Double-row steel sheet pile tension brace supporting structure serving as temporary operation platform

Abstract

The invention relates to a double-row steel sheet pile tension brace supporting structure concurrently serving as a temporary operation platform. The double-row steel sheet pile tension brace supporting structure comprises front-row steel sheet piles, rear-row steel sheet piles, a connecting pull rod assembly and the temporary operation platform. The front-row steel sheet piles are arranged on the inner side of a foundation pit, the rear-row steel sheet piles are arranged on the outer side of the foundation pit, the connecting pull rod assembly is connected between the front-row steel sheet piles and the rear-row steel sheet piles, and the temporary operation platform is arranged above the connecting pull rod assembly. The double-row steel sheet pile tension brace supporting structure concurrently serving as the temporary operation platform is provided for overcoming existing defects, the structure is simple, and the double-row steel sheet pile tension brace supporting structure can bear both tension and pressure.

Description

Technical Field

[0001] The invention relates to a double-row steel sheet pile bracing and supporting structure which also serves as a temporary working platform. Background Art

[0002] During foundation pit construction, facing the complex hydrogeological conditions, double-row steel sheet pile cofferdams have advantages over single-row steel sheet pile cofferdams in terms of good stability and strong water-stopping ability. Steel bar tie rods are used between double-row steel sheet piles, and the two ends are fixed with nuts and pads to reduce the outward deformation of the steel sheet piles.

[0003] During the construction of double-row steel sheet pile cofferdam, different effects are produced under different working conditions. Double-row steel sheet pile cofferdam can deform both outward and inward. The use of steel bar tie rods for fixing can only withstand tensile force, weakening the deformation of the steel sheet piles outward, but cannot weaken the deformation of the steel sheet piles inward. The support system with one end fixed and the other end free is limited in the tensile pressure it can withstand, and a double tie rod or multi-tie rod support system is required, which cannot adapt to complex working conditions in deep foundation pits and water.

[0004] Therefore, in order to solve the above problems, a double-row steel sheet pile support structure which also serves as a temporary working platform is proposed. Summary of the invention

[0005] The purpose of the present invention is to overcome the existing defects and provide a double-row steel sheet pile bracing and supporting structure which also serves as a temporary working platform. The structure is simple and can withstand both tension and pressure.

[0006] The technical solution to achieve the above-mentioned purpose is: a double-row steel sheet pile support structure that also serves as a temporary working platform, including a front row of steel sheet piles, a rear row of steel sheet piles, a connecting rod assembly and a temporary working platform; the front row of steel sheet piles are arranged on the inner side of the foundation pit, the rear row of steel sheet piles are arranged on the outer side of the foundation pit, the connecting rod assembly is connected between the front row of steel sheet piles and the rear row of steel sheet piles, and the temporary working platform is arranged above the connecting rod assembly.

[0007] Preferably, the connecting tie rod assembly includes a tie rod and a purlin, the purlin is respectively connected to the opposite surfaces of the front row of steel sheet piles and the rear row of steel sheet piles, and both ends of the tie rod pass through the purlins on both sides, the front row of steel sheet piles and the rear row of steel sheet piles; both ends of the tie rod protrude on both sides of the front row of steel sheet piles and the rear row of steel sheet piles, and are connected with a fixing assembly.

[0008] Preferably, a section of the pull rod between the front row of steel sheet piles and the rear row of steel sheet piles is sleeved with a casing.

[0009] Preferably, the temporary working platform comprises a steel mesh, a crushed stone cushion layer and a clay seal layer; the steel mesh is connected to the purlins connected to the opposite surfaces of the front row of steel sheet piles and the rear row of steel sheet piles, the crushed stone cushion layer is laid on the steel mesh, and the clay seal layer is laid on the crushed stone cushion layer.

[0010] Preferably, the fixing assembly includes a nut and a gasket; both ends of the pull rod are threaded sections connected to the nut, and the gasket is provided on the inner side of the nut.

[0011] Preferably, the casing is grout-injected to bond with the pull rod.

[0012] Preferably, bare soil backfill is provided between the front row of steel sheet piles and the rear row of steel sheet piles and below the steel mesh.

[0013] Preferably, the rear row of steel sheet piles are arranged close to the outside of the foundation pit to compact the original soil.

[0014] Preferably, the top elevation of the gravel cushion layer is lower than the top elevation of the rear row steel sheet piles; the top elevation of the clay sealing layer is higher than the top elevation of the rear row steel sheet piles and lower than the top elevation of the front row steel sheet piles.

[0015] The beneficial effects of the present invention are:

[0016] 1) The double-row steel sheet pile tension support structure, which also serves as a temporary working platform, is provided with a casing by adding a steel bar tie rod between the double-row steel sheet piles. The tie rod can bear the tension to reduce the deformation of the double-row steel sheet pile cofferdam to the away side, and the casing can bear the pressure to reduce the deformation of the double-row steel sheet pile cofferdam to the inward side. The fixed end and the free end of the support system are separated, which can be used for deep foundation pit construction and underwater cofferdams. It has the advantages of simple structure, good waterproof performance, and a wide range of applications.

[0017] 2) By injecting grout into the casing, the casing and the tie rod are bonded to improve the vertical compressive resistance of the casing. The casing is fixed vertically by angle steel to form a fixed end force system, which can also improve the vertical compressive resistance of the casing.

[0018] 3) By installing steel mesh or geogrid on the steel purlin, the bearing capacity of the temporary working platform can be improved and the reflective cracks caused by uneven stress can be reduced; at the same time, the steel sheet piles, steel purlins, casings, and tie rods can be protected, making them easy to dismantle and reuse after the construction is completed, which has certain economic benefits.

[0019] 4) By laying steel mesh, gravel cushion and clay seal on the double-row steel sheet pile angle purlin, the bearing capacity of the soil between the double-row steel sheet piles is improved; at the same time, the temporary working platform and the double-row steel sheet piles are connected as a whole so that they are subjected to force together, thereby improving the stability of the overall tension support structure; on the other hand, it can save construction site land, thereby saving project costs, and has certain economic benefits. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a plan view of the double-row steel sheet pile bracing support structure of the present invention which also serves as a temporary working platform;

[0021] Figure 2 It is a side sectional view of the double-row steel sheet pile bracing support structure of the present invention which also serves as a temporary working platform;

[0022] Figure 3 It is a partial schematic diagram of a double-row steel sheet pile bracing and supporting structure of the present invention which also serves as a temporary working platform.

[0023] In the figure: 1. Front row steel sheet piles; 2. Rear row steel sheet piles; 3. Tie rods; 4. Casing; 5. Purlin; 51. Short limb side of angle steel; 52. Long limb side of angle steel; 6. Fixing assembly; 61. Nut; 62. Pad; 7. Steel mesh; 8. Gravel cushion layer; 9. Clay seal layer; 10. Plain soil backfill; 11. Compacting the original soil. DETAILED DESCRIPTION

[0024] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. In the description of the present invention, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside" and the like indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, which are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0025] The present invention will be further described below in conjunction with the accompanying drawings.

[0026] like Figure 1-3 As shown, a double-row steel sheet pile support structure which also serves as a temporary working platform includes a front row of steel sheet piles 1, a rear row of steel sheet piles 2, a connecting rod assembly and a temporary working platform; the front row of steel sheet piles 1 are arranged on the inner side of the foundation pit, the rear row of steel sheet piles 2 are arranged on the outer side of the foundation pit, the front row of steel sheet piles 1 and the rear row of steel sheet piles 2 are connected with a connecting rod assembly, and a temporary working platform is arranged above the connecting rod assembly.

[0027] Specifically, the connecting rod assembly includes a rod 3 and a purlin 5. The purlin 5 is connected to the opposite surfaces of the front steel sheet pile 1 and the rear steel sheet pile 2 respectively. The two ends of the rod 3 penetrate through the purlin 5, the front steel sheet pile 1 and the rear steel sheet pile 2 on both sides. The two ends of the rod 3 protrude from both sides of the front steel sheet pile 1 and the rear steel sheet pile 2, and are connected with a fixing assembly 6. A sleeve 4 is sleeved on a section of the rod 3 between the front steel sheet pile 1 and the rear steel sheet pile 2. The sleeve 4 is grout-injected and bonded to the rod 3.

[0028] Specifically, the fixing assembly 6 includes a nut 61 and a gasket 62 ; both ends of the pull rod 3 are threaded sections connected with the nut 61 , and a gasket 62 is provided on the inner side of the nut 61 .

[0029] Specifically, the steel purlin 5 is an angle steel purlin, which is installed on the inner side of the double-row steel sheet piles. The angle steel is divided into a short limb side 51 and a long limb side 52. The short limb of the angle steel is welded to the opposite side of the steel sheet pile. The steel mesh 7 is placed on the long limb side 52 of the angle steel purlin.

[0030] Specifically, the temporary working platform includes a steel mesh 7, a crushed stone cushion layer 8 and a clay seal layer 9; the steel mesh 7 is connected to the purlin 5 connected to the opposite surfaces of the front row steel sheet piles 1 and the rear row steel sheet piles 2, the crushed stone cushion layer 8 is laid on the steel mesh 7, and the clay seal layer 9 is laid on the crushed stone cushion layer 8. The steel mesh can be replaced by a geogrid.

[0031] Specifically, between the front row steel sheet piles 1 and the rear row steel sheet piles 2, a plain soil backfill 10 is provided below the steel mesh 7. The rear row steel sheet piles 2 are provided with original soil compaction 11 near the outer side of the foundation pit. The top elevation of the crushed stone cushion layer 8 is lower than the top elevation of the rear row steel sheet piles 2; the top elevation of the clay sealing layer 9 is higher than the top elevation of the rear row steel sheet piles 2 and lower than the top elevation of the front row steel sheet pile 1.

[0032] The double-row steel sheet pile bracing support structure, which also serves as a temporary working platform, adds casings by adding steel tie rods between the double-row steel sheet piles. It can use the tie rods to bear the tensile force and reduce the deformation of the double-row steel sheet pile cofferdam to the away side, and use the casings to bear the pressure and reduce the deformation of the double-row steel sheet pile cofferdam to the inward side. By grouting in the casings, using angle steel to fix the casings vertically, and laying steel mesh, gravel cushion and clay sealing layers on the angle steel purlins, the bearing capacity of the soil between the double-row steel sheet piles is improved, and the reflective cracks caused by uneven stress are reduced, so that it can be used as a temporary mechanical platform. At the same time, it effectively protects the steel sheet piles, steel purlins, casings, and tie rods, which are convenient for dismantling and reuse after the construction is completed, thereby saving engineering costs and having certain economic benefits.

[0033] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that the technical solutions described in the above embodiments may still be modified, or some or all of the technical features may be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A double-row steel sheet pile support structure that also serves as a temporary working platform, characterized in that: It comprises a front row of steel sheet piles (1), a rear row of steel sheet piles (2), a connecting rod assembly and a temporary working platform; the front row of steel sheet piles (1) are arranged on the inner side of a foundation pit, the rear row of steel sheet piles (2) are arranged on the outer side of a foundation pit, the connecting rod assembly is connected between the front row of steel sheet piles (1) and the rear row of steel sheet piles (2), and the temporary working platform is arranged above the connecting rod assembly.

2. The double-row steel sheet pile bracing support structure serving as a temporary working platform according to claim 1 is characterized in that: The connecting rod assembly comprises a rod (3) and a purlin (5), wherein the purlin (5) is respectively connected to the opposite surfaces of the front row of steel sheet piles (1) and the rear row of steel sheet piles (2), and both ends of the rod (3) pass through the purlins (5) on both sides, the front row of steel sheet piles (1) and the rear row of steel sheet piles (2); both ends of the rod (3) protrude from both sides of the front row of steel sheet piles (1) and the rear row of steel sheet piles (2), and are connected to a fixing assembly (6).

3. The double-row steel sheet pile bracing support structure serving as a temporary working platform according to claim 2 is characterized in that: A section of the pull rod (3) between the front row of steel sheet piles (1) and the rear row of steel sheet piles (2) is sleeved with a casing (4).

4. The double-row steel sheet pile bracing support structure serving as a temporary working platform according to claim 2 is characterized in that: The temporary working platform comprises a steel mesh (7), a crushed stone cushion layer (8) and a clay sealing layer (9); the steel mesh (7) is connected to the surrounding purlin (5) connected to the opposite surfaces of the front row steel sheet piles (1) and the rear row steel sheet piles (2), the crushed stone cushion layer (8) is laid on the steel mesh (7), and the clay sealing layer (9) is laid on the crushed stone cushion layer (8).

5. The double-row steel sheet pile bracing support structure serving as a temporary working platform according to claim 2 is characterized in that: The fixing assembly (6) comprises a nut (61) and a gasket (62); both ends of the pull rod (3) are threaded sections connected to the nut (61), and the gasket (62) is arranged on the inner side of the nut (61).

6. The double-row steel sheet pile bracing support structure serving as a temporary work platform according to claim 3 is characterized in that: The sleeve (4) is grout-injected to bond with the pull rod (3).

7. The double-row steel sheet pile bracing support structure serving as a temporary work platform according to claim 4 is characterized in that: Between the front row of steel sheet piles (1) and the rear row of steel sheet piles (2), a plain soil backfill (10) is provided below the steel mesh (7).

8. The double-row steel sheet pile bracing support structure serving as a temporary working platform according to claim 1 is characterized in that: The rear row of steel sheet piles (2) are provided with original soil compaction (11) near the outer side of the foundation pit.

9. The double-row steel sheet pile bracing support structure serving as a temporary work platform according to claim 4 is characterized in that: The top elevation of the crushed stone cushion layer (8) is lower than the top elevation of the rear row steel sheet piles (2); the top elevation of the clay sealing layer (9) is higher than the top elevation of the rear row steel sheet piles (2) and lower than the top elevation of the front row steel sheet piles (1).

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