{"id":2499,"date":"2025-07-04T14:32:58","date_gmt":"2025-07-04T14:32:58","guid":{"rendered":"https:\/\/fenzemin.com\/services\/ground-nail\/"},"modified":"2026-10-24T13:39:59","modified_gmt":"2026-10-24T13:39:59","slug":"ground-nail","status":"publish","type":"page","link":"https:\/\/fenzemin.com\/en\/services\/ground-nail\/","title":{"rendered":"Ground Nail"},"content":{"rendered":"\n
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Soil Nailing & Soil Nail Walls | Fen Zemin & \u0130n\u015faat<\/code><\/h1><\/div>\n<\/div><\/div>\n\n\n\n
\"\"<\/figure>\n\n\n\n

Soil Nailing & Soil Nail Walls | Fen Zemin & \u0130n\u015faat<\/h2>\n\n\n\n

Fen Zemin & \u0130n\u015faat carries out soil nailing<\/strong> for excavation support and slope stabilisation projects, with nail geometry, drilling method, facing system and construction sequence determined according to ground conditions and geotechnical design.<\/p>\n\n\n\n

Soil nailing is a passive reinforcement method in which steel bars are installed into the ground at defined angles and spacing to create a reinforced soil mass.<\/p>\n\n\n\n

The nails generally work together with the surrounding ground, shotcrete facing, reinforcement and drainage system.<\/p>\n\n\n\n

At Fen Zemin & \u0130n\u015faat, soil nailing is evaluated as a complete retaining system rather than simply as a drilling operation.<\/p>\n\n\n\n

What Is Soil Nailing?<\/h2>\n\n\n\n

Soil nailing is a ground reinforcement technique used to improve the stability of excavations and slopes.<\/p>\n\n\n\n

Steel reinforcement bars are installed in drilled holes and typically bonded to the surrounding ground with cement grout.<\/p>\n\n\n\n

As excavation progresses and the retained ground undergoes small movements, tensile forces develop in the soil nails.<\/p>\n\n\n\n

For this reason, soil nails are generally considered passive reinforcement elements.<\/p>\n\n\n\n

They are not normally prestressed in the same way as ground anchors.<\/p>\n\n\n\n

Where Is Soil Nailing Used?<\/h2>\n\n\n\n

Soil nailing may be used in:<\/p>\n\n\n\n

    \n
  • deep excavations,<\/li>\n\n\n\n
  • basement excavations,<\/li>\n\n\n\n
  • road cuttings,<\/li>\n\n\n\n
  • slope stabilisation,<\/li>\n\n\n\n
  • urban redevelopment projects,<\/li>\n\n\n\n
  • retaining structures,<\/li>\n\n\n\n
  • infrastructure works.<\/li>\n<\/ul>\n\n\n\n

    The method is particularly suitable where staged top-down excavation is possible and the ground can remain sufficiently stable during each construction stage.<\/p>\n\n\n\n

    Not every excavation is suitable for soil nailing.<\/p>\n\n\n\n

    Ground conditions, groundwater, neighbouring structures, excavation geometry and deformation limits must be considered before the method is selected.<\/p>\n\n\n\n

    How Does a Soil Nail Wall Work?<\/h2>\n\n\n\n

    A soil nail wall does not rely on a single structural element.<\/p>\n\n\n\n

    The system works through the interaction between:<\/p>\n\n\n\n

      \n
    • the reinforced soil mass,<\/li>\n\n\n\n
    • steel soil nails,<\/li>\n\n\n\n
    • grout surrounding the nails,<\/li>\n\n\n\n
    • shotcrete or other facing,<\/li>\n\n\n\n
    • reinforcement mesh,<\/li>\n\n\n\n
    • drainage.<\/li>\n<\/ul>\n\n\n\n

      As excavation progresses, the ground tends to deform.<\/p>\n\n\n\n

      This deformation mobilises tensile forces in the nails.<\/p>\n\n\n\n

      The nails then help restrain the soil mass and improve overall stability.<\/p>\n\n\n\n

      The facing distributes local loads and helps maintain the stability of the excavation surface.<\/p>\n\n\n\n

      How Is Soil Nailing Installed?<\/h2>\n\n\n\n

      Soil nail construction usually progresses from the top downward in controlled excavation stages.<\/p>\n\n\n\n

      1. Project and Site Review<\/h3>\n\n\n\n

      Before construction begins, the geotechnical design and available ground information are reviewed.<\/p>\n\n\n\n

      Important design parameters may include:<\/p>\n\n\n\n

        \n
      • nail length,<\/li>\n\n\n\n
      • inclination,<\/li>\n\n\n\n
      • horizontal spacing,<\/li>\n\n\n\n
      • vertical spacing,<\/li>\n\n\n\n
      • bar diameter,<\/li>\n\n\n\n
      • grout requirements,<\/li>\n\n\n\n
      • facing thickness,<\/li>\n\n\n\n
      • excavation stages.<\/li>\n<\/ul>\n\n\n\n

        Site conditions are also assessed.<\/p>\n\n\n\n

        Neighbouring buildings, utilities, access restrictions and groundwater may affect the construction method.<\/p>\n\n\n\n

        2. Staged Excavation<\/h3>\n\n\n\n

        Soil nail walls are generally constructed in stages.<\/p>\n\n\n\n

        A limited excavation depth is completed first.<\/p>\n\n\n\n

        The exposed face is then stabilised before the next excavation stage begins.<\/p>\n\n\n\n

        This sequence is fundamental to the performance of the system.<\/p>\n\n\n\n

        Excavating too deeply before installing the required reinforcement can increase instability and deformation risk.<\/p>\n\n\n\n

        3. Surface Preparation<\/h3>\n\n\n\n

        The excavation face is trimmed and prepared.<\/p>\n\n\n\n

        Depending on the ground conditions and design, an initial layer of shotcrete may be applied before drilling.<\/p>\n\n\n\n

        In more stable ground, drilling may be carried out directly before the main facing is installed.<\/p>\n\n\n\n

        The exact sequence should follow the approved geotechnical design.<\/p>\n\n\n\n

        4. Soil Nail Drilling<\/h3>\n\n\n\n

        Holes are drilled at the specified locations and inclinations.<\/p>\n\n\n\n

        The drilling method depends on:<\/p>\n\n\n\n

          \n
        • soil conditions,<\/li>\n\n\n\n
        • groundwater,<\/li>\n\n\n\n
        • nail length,<\/li>\n\n\n\n
        • borehole stability,<\/li>\n\n\n\n
        • access conditions.<\/li>\n<\/ul>\n\n\n\n

          The drilling angle and position should follow the project requirements.<\/p>\n\n\n\n

          Changing the geometry simply to make drilling easier can affect the behaviour of the system.<\/p>\n\n\n\n

          5. Reinforcement Bar Installation<\/h3>\n\n\n\n

          The specified steel bar is installed into the drilled hole.<\/p>\n\n\n\n

          Centralisers or other detailing may be used where required to position the reinforcement correctly within the hole.<\/p>\n\n\n\n

          For permanent systems, corrosion protection requirements may also affect the type of reinforcement and protective measures.<\/p>\n\n\n\n

          6. Grouting<\/h3>\n\n\n\n

          The annular space around the steel bar is filled with cementitious grout.<\/p>\n\n\n\n

          The grout provides bond between the steel reinforcement and the surrounding ground.<\/p>\n\n\n\n

          This bond is essential because soil nail forces are transferred into the ground through the grouted length.<\/p>\n\n\n\n

          Grouting quality therefore directly affects the performance of the nail.<\/p>\n\n\n\n

          Soil Nailing and Shotcrete<\/h2>\n\n\n\n

          Shotcrete is commonly used as the facing element of a soil nail wall.<\/p>\n\n\n\n

          After the nails are installed, reinforcement mesh and nail-head details may be completed before the shotcrete layer is applied.<\/p>\n\n\n\n

          The facing system may include:<\/p>\n\n\n\n

            \n
          • welded wire mesh,<\/li>\n\n\n\n
          • reinforcing bars,<\/li>\n\n\n\n
          • nail-head plates,<\/li>\n\n\n\n
          • shotcrete,<\/li>\n\n\n\n
          • drainage elements.<\/li>\n<\/ul>\n\n\n\n

            Shotcrete should not be considered only as surface protection.<\/p>\n\n\n\n

            In a soil nail wall, it forms part of the retaining system and helps distribute loads between adjacent nails.<\/p>\n\n\n\n

            What Is the Difference Between a Soil Nail and a Ground Anchor?<\/h2>\n\n\n\n

            Soil nails and ground anchors may appear similar during drilling, but their structural behaviour is different.<\/p>\n\n\n\n

            A soil nail<\/strong> is generally a passive reinforcement element.<\/p>\n\n\n\n

            It develops tensile load as the reinforced ground mass deforms.<\/p>\n\n\n\n

            A prestressed ground anchor<\/strong> is actively tensioned and transfers a defined force into the ground or rock before significant retaining-wall movement occurs.<\/p>\n\n\n\n

            The two systems should therefore not be treated as interchangeable.<\/p>\n\n\n\n

            The appropriate system depends on:<\/p>\n\n\n\n

              \n
            • ground conditions,<\/li>\n\n\n\n
            • excavation depth,<\/li>\n\n\n\n
            • allowable deformation,<\/li>\n\n\n\n
            • surrounding structures,<\/li>\n\n\n\n
            • available working area,<\/li>\n\n\n\n
            • construction sequence.<\/li>\n<\/ul>\n\n\n\n

              Which Soils Are Suitable for Soil Nailing?<\/h2>\n\n\n\n

              Soil nailing is generally most suitable where the ground can remain stable for a short period during staged excavation.<\/p>\n\n\n\n

              Suitable conditions may include:<\/p>\n\n\n\n

                \n
              • stiff cohesive soils,<\/li>\n\n\n\n
              • dense granular soils with sufficient apparent stability,<\/li>\n\n\n\n
              • weathered formations,<\/li>\n\n\n\n
              • certain residual soils.<\/li>\n<\/ul>\n\n\n\n

                The method may be less suitable in very loose, running or highly unstable soils unless additional measures are used.<\/p>\n\n\n\n

                Suitability should be confirmed from geotechnical information rather than assumed from surface appearance.<\/p>\n\n\n\n

                How Does Groundwater Affect Soil Nailing?<\/h2>\n\n\n\n

                Groundwater can significantly affect soil nail wall performance.<\/p>\n\n\n\n

                Water may reduce face stability, increase pore pressures and create local erosion or washout.<\/p>\n\n\n\n

                Drainage is therefore an important part of many soil nail systems.<\/p>\n\n\n\n

                Depending on the design, drainage measures may include:<\/p>\n\n\n\n

                  \n
                • weep holes,<\/li>\n\n\n\n
                • drainage strips,<\/li>\n\n\n\n
                • surface drainage,<\/li>\n\n\n\n
                • local collection systems,<\/li>\n\n\n\n
                • other groundwater-control measures.<\/li>\n<\/ul>\n\n\n\n

                  A shotcrete facing should not trap uncontrolled water pressure behind the wall.<\/p>\n\n\n\n

                  How Are Nail Length, Angle and Spacing Determined?<\/h2>\n\n\n\n

                  There is no single standard soil nail geometry suitable for every project.<\/p>\n\n\n\n

                  Nail length, inclination and spacing depend on:<\/p>\n\n\n\n

                    \n
                  • excavation height,<\/li>\n\n\n\n
                  • soil strength,<\/li>\n\n\n\n
                  • groundwater,<\/li>\n\n\n\n
                  • potential failure surfaces,<\/li>\n\n\n\n
                  • external loads,<\/li>\n\n\n\n
                  • neighbouring structures,<\/li>\n\n\n\n
                  • required factor of safety,<\/li>\n\n\n\n
                  • deformation criteria.<\/li>\n<\/ul>\n\n\n\n

                    The design should evaluate both internal and external stability.<\/p>\n\n\n\n

                    The construction layout should therefore follow the approved geotechnical design rather than standard field dimensions.<\/p>\n\n\n\n

                    Temporary and Permanent Soil Nail Walls<\/h2>\n\n\n\n

                    Soil nail systems may be temporary or permanent depending on the project requirements.<\/p>\n\n\n\n

                    Temporary Soil Nail Walls<\/h3>\n\n\n\n

                    Temporary systems are generally used during construction and may later be incorporated behind or replaced by permanent structural elements.<\/p>\n\n\n\n

                    Permanent Soil Nail Walls<\/h3>\n\n\n\n

                    Permanent systems remain part of the long-term retaining structure.<\/p>\n\n\n\n

                    Durability, corrosion protection, facing details and drainage therefore require greater long-term consideration.<\/p>\n\n\n\n

                    The intended service life should be defined during design.<\/p>\n\n\n\n

                    Corrosion Protection for Soil Nails<\/h2>\n\n\n\n

                    Permanent soil nail systems require appropriate durability measures.<\/p>\n\n\n\n

                    Depending on the design and exposure conditions, corrosion protection may involve:<\/p>\n\n\n\n

                      \n
                    • grout cover,<\/li>\n\n\n\n
                    • coated reinforcement,<\/li>\n\n\n\n
                    • protective sheaths,<\/li>\n\n\n\n
                    • project-specific corrosion protection systems.<\/li>\n<\/ul>\n\n\n\n

                      The required level of protection depends on the service life, ground conditions and applicable design requirements.<\/p>\n\n\n\n

                      Corrosion protection should not be selected informally during construction.<\/p>\n\n\n\n

                      Soil Nail Pullout Testing<\/h2>\n\n\n\n

                      Pullout testing may be used to evaluate the bond resistance between the grouted soil nail and the surrounding ground.<\/p>\n\n\n\n

                      During the test, load is applied to the nail and the corresponding movement is monitored.<\/p>\n\n\n\n

                      The test can help verify whether the ground-grout interface develops the required resistance.<\/p>\n\n\n\n

                      Test procedures, test loads and acceptance criteria should be defined by the geotechnical design or technical specification.<\/p>\n\n\n\n

                      Soil Nailing Quality Control<\/h2>\n\n\n\n

                      Because soil nails remain largely below ground, quality control is important.<\/p>\n\n\n\n

                      Depending on the project, field records may include:<\/p>\n\n\n\n

                        \n
                      • drilling location,<\/li>\n\n\n\n
                      • nail inclination,<\/li>\n\n\n\n
                      • nail length,<\/li>\n\n\n\n
                      • reinforcement details,<\/li>\n\n\n\n
                      • grout records,<\/li>\n\n\n\n
                      • pullout test results,<\/li>\n\n\n\n
                      • shotcrete thickness,<\/li>\n\n\n\n
                      • reinforcement mesh details.<\/li>\n<\/ul>\n\n\n\n

                        Construction records help confirm that the installed system is consistent with the approved design.<\/p>\n\n\n\n

                        Why Is Staged Excavation Important?<\/h2>\n\n\n\n

                        The construction sequence is one of the most important aspects of soil nail wall performance.<\/p>\n\n\n\n

                        Soil nailing is generally installed from the top downward.<\/p>\n\n\n\n

                        Each excavation stage exposes a limited height of soil.<\/p>\n\n\n\n

                        The nails, drainage and facing for that stage are then completed before excavation continues.<\/p>\n\n\n\n

                        This sequence helps control deformation and maintain face stability.<\/p>\n\n\n\n

                        The excavation depth per stage should therefore follow the design and observed ground conditions.<\/p>\n\n\n\n

                        Soil Nailing vs Ground Anchors<\/h2>\n\n\n\n

                        Soil nailing and ground anchors are both used in excavation support, but they work differently.<\/p>\n\n\n\n

                        Soil nails reinforce the ground mass itself and are generally passive.<\/p>\n\n\n\n

                        Ground anchors actively support a retaining structure through prestressing.<\/p>\n\n\n\n

                        Soil nail walls can be effective where staged excavation and moderate ground deformation are acceptable.<\/p>\n\n\n\n

                        Anchored retaining systems may be more appropriate where stricter deformation control or different structural behaviour is required.<\/p>\n\n\n\n

                        The final choice should be based on project-specific geotechnical analysis.<\/p>\n\n\n\n

                        Soil Nailing vs Bored Pile Retaining Walls<\/h2>\n\n\n\n

                        A soil nail wall reinforces the existing ground mass and generally uses shotcrete as the facing.<\/p>\n\n\n\n

                        A bored pile retaining wall creates a line of structural pile elements before or during excavation.<\/p>\n\n\n\n

                        Bored pile systems may be more appropriate where:<\/p>\n\n\n\n

                          \n
                        • the ground cannot remain stable during unsupported excavation,<\/li>\n\n\n\n
                        • deformation limits are strict,<\/li>\n\n\n\n
                        • neighbouring structures are sensitive,<\/li>\n\n\n\n
                        • excavation conditions require a more rigid retaining system.<\/li>\n<\/ul>\n\n\n\n

                          Soil nailing can be more efficient where the ground is suitable and staged excavation is feasible.<\/p>\n\n\n\n

                          These systems should therefore not be selected solely by comparing unit prices.<\/p>\n\n\n\n

                          Advantages of Soil Nailing<\/h2>\n\n\n\n

                          Where ground and site conditions are suitable, soil nailing can provide several practical advantages.<\/p>\n\n\n\n

                          These may include:<\/p>\n\n\n\n

                            \n
                          • top-down construction,<\/li>\n\n\n\n
                          • relatively compact drilling equipment,<\/li>\n\n\n\n
                          • adaptability to irregular excavation geometry,<\/li>\n\n\n\n
                          • limited working space requirements,<\/li>\n\n\n\n
                          • integration with shotcrete facing,<\/li>\n\n\n\n
                          • flexibility during staged excavation.<\/li>\n<\/ul>\n\n\n\n

                            The method can be particularly useful on urban sites where large retaining equipment would be difficult to mobilise.<\/p>\n\n\n\n

                            Limitations of Soil Nailing<\/h2>\n\n\n\n

                            Soil nailing also has limitations.<\/p>\n\n\n\n

                            The method may be less suitable where:<\/p>\n\n\n\n

                              \n
                            • the ground cannot remain stable during staged excavation,<\/li>\n\n\n\n
                            • groundwater is uncontrolled,<\/li>\n\n\n\n
                            • large deformations cannot be tolerated,<\/li>\n\n\n\n
                            • underground obstructions interfere with nail installation,<\/li>\n\n\n\n
                            • neighbouring foundations conflict with nail geometry,<\/li>\n\n\n\n
                            • property boundaries restrict nail length.<\/li>\n<\/ul>\n\n\n\n

                              These conditions should be reviewed before the method is selected.<\/p>\n\n\n\n

                              Soil Nailing Cost<\/h2>\n\n\n\n

                              Soil nailing cost should not be evaluated only from the total drilling length.<\/p>\n\n\n\n

                              The total cost may be affected by:<\/p>\n\n\n\n

                                \n
                              • number of nails,<\/li>\n\n\n\n
                              • nail length,<\/li>\n\n\n\n
                              • borehole diameter,<\/li>\n\n\n\n
                              • ground conditions,<\/li>\n\n\n\n
                              • reinforcement,<\/li>\n\n\n\n
                              • grout quantity,<\/li>\n\n\n\n
                              • shotcrete thickness,<\/li>\n\n\n\n
                              • mesh reinforcement,<\/li>\n\n\n\n
                              • pullout testing,<\/li>\n\n\n\n
                              • drainage,<\/li>\n\n\n\n
                              • excavation stages,<\/li>\n\n\n\n
                              • project location,<\/li>\n\n\n\n
                              • mobilisation.<\/li>\n<\/ul>\n\n\n\n

                                Two projects with similar excavation heights can therefore have significantly different costs.<\/p>\n\n\n\n

                                A reliable quotation requires review of both the geotechnical design and actual site conditions.<\/p>\n\n\n\n

                                How Does Fen Zemin & \u0130n\u015faat Evaluate a Soil Nailing Project?<\/h2>\n\n\n\n

                                The initial review begins with the available technical documents.<\/p>\n\n\n\n

                                Where available, we review:<\/p>\n\n\n\n

                                  \n
                                • ground investigation report,<\/li>\n\n\n\n
                                • excavation support design,<\/li>\n\n\n\n
                                • excavation sections,<\/li>\n\n\n\n
                                • nail lengths,<\/li>\n\n\n\n
                                • nail spacing,<\/li>\n\n\n\n
                                • nail inclination,<\/li>\n\n\n\n
                                • shotcrete details,<\/li>\n\n\n\n
                                • drainage requirements.<\/li>\n<\/ul>\n\n\n\n

                                  Site conditions are then evaluated.<\/p>\n\n\n\n

                                  Neighbouring buildings, working space, equipment access, property boundaries, groundwater and excavation sequence may all affect construction.<\/p>\n\n\n\n

                                  The objective is to ensure that the approved soil nail system can realistically be executed under the actual site conditions.<\/p>\n\n\n\n

                                  Soil Nailing in Istanbul and Across T\u00fcrkiye<\/h2>\n\n\n\n

                                  Fen Zemin & \u0130n\u015faat is based in \u00dcmraniye, Istanbul.<\/p>\n\n\n\n

                                  Soil nailing projects in Istanbul and other regions of T\u00fcrkiye may be evaluated depending on excavation geometry, project size, ground conditions, mobilisation requirements and site access.<\/p>\n\n\n\n

                                  Projects may include:<\/p>\n\n\n\n

                                    \n
                                  • deep excavations,<\/li>\n\n\n\n
                                  • basement works,<\/li>\n\n\n\n
                                  • slope stabilisation,<\/li>\n\n\n\n
                                  • urban redevelopment,<\/li>\n\n\n\n
                                  • infrastructure projects,<\/li>\n\n\n\n
                                  • retaining systems.<\/li>\n<\/ul>\n\n\n\n

                                    Each project is assessed individually before the construction method and equipment requirements are defined.<\/p>\n\n\n\n

                                    Soil Nailing Frequently Asked Questions<\/h2>\n\n\n\n

                                    What is soil nailing?<\/h3>\n\n\n\n

                                    Soil nailing is a passive ground reinforcement method in which steel bars are installed into drilled and grouted holes to improve the stability of excavations or slopes.<\/p>\n\n\n\n

                                    Is a soil nail the same as a ground anchor?<\/h3>\n\n\n\n

                                    No. Soil nails are generally passive reinforcement elements, while prestressed ground anchors are actively tensioned.<\/p>\n\n\n\n

                                    Is shotcrete always used with soil nails?<\/h3>\n\n\n\n

                                    Shotcrete is commonly used as the facing system in soil nail walls, but the exact facing arrangement depends on the project design.<\/p>\n\n\n\n

                                    How are soil nails installed?<\/h3>\n\n\n\n

                                    Soil nails are generally installed in stages as excavation progresses. Holes are drilled, steel bars are placed, grout is injected and the facing system is completed before excavation continues.<\/p>\n\n\n\n

                                    How long are soil nails?<\/h3>\n\n\n\n

                                    There is no single standard length. Nail length depends on excavation height, ground conditions, stability requirements and the geotechnical design.<\/p>\n\n\n\n

                                    Can soil nailing be used permanently?<\/h3>\n\n\n\n

                                    Yes. Soil nail walls may be designed as temporary or permanent systems. Permanent applications require appropriate durability and corrosion protection.<\/p>\n\n\n\n

                                    What is a soil nail pullout test?<\/h3>\n\n\n\n

                                    A pullout test applies controlled tensile load to a soil nail to evaluate the bond resistance between the grouted nail and the surrounding ground.<\/p>\n\n\n\n

                                    Can soil nailing be used in groundwater?<\/h3>\n\n\n\n

                                    Groundwater does not automatically prevent soil nailing, but drainage and groundwater conditions must be carefully considered. Uncontrolled water can significantly affect face stability and system performance.<\/p>\n\n\n\n

                                    What determines soil nailing cost?<\/h3>\n\n\n\n

                                    Nail quantity, length, ground conditions, grout, reinforcement, shotcrete, drainage, testing, excavation sequence and mobilisation all affect total cost.<\/p>\n\n\n\n

                                    What information is required for a soil nailing quotation?<\/h3>\n\n\n\n

                                    Where available, the ground investigation report, excavation support design, nail layout, lengths, quantities, shotcrete details, project location and site information should be provided.<\/p>\n\n\n\n

                                    Discuss Your Soil Nailing Project with Fen Zemin & \u0130n\u015faat<\/h2>\n\n\n\n

                                    For deep excavations, slope stabilisation and soil nail wall applications, you can share your available project information with Fen Zemin & \u0130n\u015faat.<\/p>\n\n\n\n

                                    Where available, provide the ground investigation report, excavation support design, soil nail layout, shotcrete details and site information so that the technical scope and construction requirements can be reviewed accurately.<\/p>\n\n\n\n

                                    Contact the Fen Zemin & \u0130n\u015faat technical team to discuss your soil nailing project.<\/strong><\/p>\n","protected":false},"excerpt":{"rendered":"

                                    Soil Nailing & Soil Nail Walls | Fen Zemin & \u0130n\u015faat Soil Nailing & Soil Nail Walls | Fen Zemin & \u0130n\u015faat Fen Zemin & \u0130n\u015faat carries out soil nailing for excavation support and slope stabilisation projects, with nail geometry, drilling method, facing system and construction sequence determined according to ground conditions and geotechnical design. 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