Assembled foundation pit retaining wall structure

Abstract

The invention discloses an assembled foundation pit retaining wall structure, which belongs to the technical field of foundation pit retaining wall structures. A prefabricated water retaining plate is provided to block the seepage water on the foundation pit wall surface and the surface water on the foundation pit ground, thereby avoiding the penetration of underground water at the edge of the foundation pit and reducing the water seepage of the stratum at the edge of the foundation pit. A water pump is provided in an insert pipe and water is pumped by a water pump to pump out the water blocked above the prefabricated water retaining plate, thereby improving the waterproof effect, ensuring a lower humidity in the bottom layer at the edge of the foundation pit, and ensuring that the foundation pit construction can still proceed smoothly on rainy days.

Description

Technical Field

[0001] The invention belongs to the technical field of foundation pit retaining wall structures, and in particular relates to an assembled foundation pit retaining wall structure. Background Art

[0002] Retaining wall structures need to be built on the walls around the foundation pit to reinforce the foundation pit and prevent water seepage. The walls can be reinforced by setting steel plates or prefabricated panels. The existing wall reinforcement structure is only a retaining wall structure for the wall. Accidental water seepage on the wall can still seep into the foundation pit through the bottom of the retaining wall structure. Moreover, the water seepage inside the foundation pit during the rainy season will also seep into the bottom layer below the retaining wall structure. Long-term water seepage will cause the soil below the retaining wall structure to become loose and the supporting force to be insufficient, causing problems such as collapse or even tilt of the retaining wall structure. Summary of the Invention

[0003] In view of this, the object of the present invention is to provide an assembled foundation pit retaining wall structure, which is simple and reasonable to install and improves the water seepage problem below the retaining wall structure.

[0004] In order to achieve the above object, the present invention provides the following technical solutions:

[0005] The present invention includes a prefabricated water retaining plate embedded in the ground layer at the edge of a foundation pit, and the ground at the edge of the foundation pit is provided with a plurality of retaining wall structures arranged along the edge of the foundation pit, and the retaining wall structure includes wall panels spliced ​​at intervals and insert pipes, the wall panels are vertically arranged, and a bottom plate is provided on the bottom side of the wall panels, and casting holes are downwardly provided at the bottom plate, which pass through the bottom plate, the ground, the prefabricated water retaining plate and the soil layer below the prefabricated water retaining plate in sequence, and also includes a pre-positioning cylinder placed on the inner side of the top of the casting hole and a steel cage inside the casting hole, concrete is poured in the casting hole, slots spliced ​​with the edges of the wall panels are provided on both sides of the insert pipe, the soil at the bottom end of the insert pipe is hollowed out and a pumping pipe is provided, and the pumping pipe extends along the insert pipe to the outside of the foundation pit and is connected to a water pump.

[0006] Furthermore, the water pumping pipes are arranged at intervals in the arranged cannulas, and the bottom ends of the other cannulas are provided with liquid level sensors. The liquid level sensors are arranged along the extension direction of the water pumping pipes, the lower ends of the liquid level sensors contact the prefabricated water retaining plates, and the upper ends are higher than the ground at the edge of the foundation pit.

[0007] Furthermore, the upper end of the pre-positioning cylinder is provided with a connection flange fixedly connected to the bottom plate.

[0008] Furthermore, a reinforcing rib plate is fixedly connected between the wall panel and the bottom plate.

[0009] Furthermore, the bottom end of the cannula is a sharpened structure.

[0010] Furthermore, the bottom end of the insert pipe is against the top side of the prefabricated water retaining plate, and the wall surface of the bottom end of the insert pipe is provided with a plurality of through grooves, and the through grooves are covered with a layer of fine mesh.

[0011] Furthermore, the bottom surface of the prefabricated water retaining plate is horizontal, and the two sides extend obliquely outward and upward, forming an inverted trapezoidal structure. The wall panel is located above the middle of the prefabricated water retaining plate, and the wall panel is filled with soil toward the side of the foundation pit wall.

[0012] The beneficial effects of the present invention are:

[0013] The present invention is arranged on the ground at the edge of the foundation pit and is in the form of a wall structure. Its construction method is as follows: first, a ditch is dug under the ground at the edge of the foundation pit, and then a prefabricated water retaining plate is laid in the ditch. The prefabricated water retaining plate is a steel plate structure. After the paving is completed, the ditch is filled and leveled, and the wall panels and the plug-in plates are installed. The wall panels and the plug-in plates are arranged at intervals, and the wall panels are placed vertically on the ground through the bottom plate structure. The plug-in plates are plugged into the wall panels through slots, so that the retaining wall structure is a continuous and sealed water-proof wall surface. The wall panels are arranged against the foundation pit wall surface. After the retaining wall structure is arranged, a casting hole is drilled by a drilling rig, and the bottom plate, the ground, the prefabricated water retaining plate and the soil layer below the prefabricated water retaining plate are drilled at one time to form a casting hole, and then a pre-positioning cylinder is arranged at the bottom plate drill hole to estimate the expected The steel cage is then poured with concrete. The pre-positioning cylinder is used to limit the vertical position of the wall panels. After the concrete solidifies, the steel cage forms a fixed pile body connecting the prefabricated water retaining plate, the wall panels and the ground. The pile body serves as the anchor structure of the retaining wall structure to prevent the wall panels from tilting. This retaining wall structure, by setting up a prefabricated water retaining plate, blocks the seepage water of the foundation pit wall and the surface water of the foundation pit ground, avoids the penetration of underground water at the edge of the foundation pit, and reduces the seepage of the stratum at the edge of the foundation pit. By setting a pumping pipe in the intubation pipe and pumping water through a water pump, the water blocked above the prefabricated water retaining plate is pumped out, thereby improving the waterproof effect, ensuring a lower humidity in the bottom layer at the edge of the foundation pit, and ensuring that the foundation pit construction can still proceed smoothly on rainy days.

[0014] Other advantages, objectives and features of the present invention will be described in the following description and will be apparent to those skilled in the art to some extent, or those skilled in the art can be taught from the practice of the present invention. The objectives and other advantages of the present invention can be realized and obtained through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to make the purpose, technical solutions and beneficial effects of the present invention more clear, the present invention provides the following drawings for illustration:

[0016] Figure 1 This is a schematic diagram of assembling a foundation pit retaining wall according to an embodiment of the present invention;

[0017] Figure 2 This is a cross-sectional view of a pouring hole according to an embodiment of the present invention;

[0018] Figure 3 This is a schematic diagram of the structure of the cannula end according to an embodiment of the present invention;

[0019] Figure 4 This is a schematic diagram of the splicing of wall panels and pipes according to an embodiment of the present invention;

[0020] Figure 5 This is a schematic diagram of the internal structure of the cannula in an embodiment of the present invention;

[0021] The markings in the attached drawings are as follows: 1. Prefabricated water retaining plate; 2. Retaining wall structure; 21. Wall panel; 211. Reinforcement plate; 22. Insert pipe; 221. Slot; 222. Through groove; 223. Fine mesh; 23. Bottom plate; 24. Casting hole; 25. Pre-positioning cylinder; 251. Connecting flange; 26. Steel cage; 27. Suction pipe; 28. Liquid level sensor. DETAILED DESCRIPTION

[0022] like Figures 1 to 5 As shown, the present invention discloses an assembled foundation pit retaining wall structure, such as Figure 1 、 Figure 2 As shown, it includes a prefabricated water retaining plate 1 embedded in the ground layer at the edge of the foundation pit, and the ground at the edge of the foundation pit is provided with a plurality of retaining wall structures 2 arranged along the edge of the foundation pit, and the retaining wall structure 2 includes spaced wall panels 21 and intubations 22, the wall panels 21 are vertically arranged, and a bottom plate 23 is provided on the bottom side of the wall panel 21, and a casting hole 24 is downwardly opened at the bottom plate 23 that passes through the bottom plate 23, the ground, the prefabricated water retaining plate 1 and the soil layer below the prefabricated water retaining plate 1 in sequence, and also includes a pre-positioning cylinder 25 placed on the inner side of the top of the casting hole 24 and a steel cage 26 inside the casting hole 24, and concrete is poured in the casting hole 24, with reference to Figure 4 , slots 221 are provided on both sides of the insert pipe 22 for splicing with the edges of the wall panel 21, the bottom end of the insert pipe 22 is against the top side of the prefabricated water retaining plate 1, and a plurality of through grooves 222 are provided on the wall surface of the bottom end of the insert pipe 22, and the through grooves 222 are covered with a layer of fine mesh 223. The soil at the bottom end of the insert pipe 22 is hollowed out and a pumping pipe 27 is provided. The pumping pipe 27 extends along the insert pipe 22 to the outside of the foundation pit and is connected to a water pump.

[0023] This structure is set on the ground at the edge of the foundation pit and is a wall structure. Its construction method is to first dig a ditch under the ground at the edge of the foundation pit, and then lay a prefabricated water retaining plate 1 in the ditch. The prefabricated water retaining plate 1 is a steel plate structure. After paving, fill the ditch, and implement the installation of wall panels 21 and plugs 22. The wall panels 21 and the plugs are set at intervals. The wall panels 21 are placed vertically on the ground through the bottom plate 23 structure. The plugs 22 are plugged into the wall panels 21 through the slots 221, so that the retaining wall structure 2 is a continuous and sealed water-proof wall surface. The wall panels 21 are set against the foundation pit wall surface. After the retaining wall structure 2 is arranged, the casting holes 24 are drilled by the drilling rig. The bottom plate 23, the ground, the prefabricated water retaining plate 1 and the lower soil layer of the prefabricated water retaining plate 1 are drilled at one time to form the casting holes 24, and then the casting holes 24 are set at the bottom plate 23 drilling holes. The pre-positioning cylinder 25 anticipates the steel cage 26, and finally the concrete is poured. The pre-positioning cylinder 25 is used to vertically limit the wall panel 21. After the concrete solidifies, the steel cage 26 forms a fixed pile body connecting the prefabricated water retaining plate 1, the wall panel 21 and the ground. The pile body serves as the anchoring structure of the retaining wall structure 2 to prevent the wall panel 21 from tilting; this retaining wall structure, by setting the prefabricated water retaining plate 1, blocks the seepage water of the foundation pit wall and the surface water of the foundation pit ground, avoids the penetration of underground water at the edge of the foundation pit, and reduces the seepage of the stratum at the edge of the foundation pit. By setting a pumping pipe 27 in the insert pipe 22 and pumping water through a pump, the water blocked above the prefabricated water retaining plate 1 is pumped out, thereby improving the waterproof effect, ensuring the lower humidity of the bottom layer at the edge of the foundation pit, and ensuring that the foundation pit construction can still proceed smoothly on rainy days.

[0024] In a further solution, Figure 5 As shown, the pumping pipes 27 are arranged at intervals in the arranged inserts 22, and the bottom ends of the remaining inserts 22 are provided with liquid level sensors 28. The liquid level sensors 28 are arranged along the extension direction of the pumping pipes 27. The lower ends of the liquid level sensors 28 contact the prefabricated water retaining plate 1, and the upper ends are higher than the ground at the edge of the foundation pit.

[0025] In this structure, the liquid level sensor 28 can sense the depth of the liquid level in the infiltration tube 22. By setting the liquid level sensor 28, the degree of water seepage at the edge of the foundation pit can be judged to control the switch of the water pump and save energy. The water pumping pipes 27 and the liquid level sensor 28 arranged at intervals can not only ensure the rapid and uniform extraction of water seepage at the edge of the foundation pit, but also ensure the real-time data recording of the water seepage depth at the edge of the foundation pit.

[0026] In a further solution, Figure 1 and Figure 4 As shown, the upper end of the pre-positioning cylinder 25 is provided with a connecting flange 251 fixedly connected to the base plate 23. By setting the flange, the pre-positioning cylinder 25 is fixed to the position of the base plate 23, thereby improving the fixing ability of the pre-positioning cylinder 25 and ensuring that the pre-positioning cylinder 25 limits the vertical position of the wall panel 21.

[0027] In a further solution, Figure 1 The wall panel 21 and the bottom panel 23 are fixedly connected with a reinforcing rib plate 211. By providing the reinforcing rib plate 211, the verticality between the bottom panel 23 and the vertical panel is ensured, and the supporting capacity of the wall panel 21 is also ensured after the construction is completed.

[0028] In a further solution, Figure 3 As shown, the bottom end of the insert tube 22 is a pointed structure. By providing the insert tube 22 with a pointed structure, it is easy to insert the insert tube 22 into the ground, thereby improving the convenience of construction operation.

[0029] In a further solution, the bottom surface of the prefabricated water retaining plate 1 is horizontal, and the two sides extend obliquely outward and upward, forming an inverted trapezoidal structure. The wall panel 21 is located above the middle part of the prefabricated water retaining plate 1, and the wall panel 21 is filled with soil toward the side of the foundation pit wall. This structure is conducive to the collection and diversion of seepage water.

[0030] Finally, it should be noted that the above preferred embodiments are only used to illustrate the technical solutions of the present invention and are not limiting. Although the present invention has been described in detail through the above preferred embodiments, those skilled in the art should understand that various changes can be made in form and details without departing from the scope defined by the claims of the present invention.

Claims

1. An assembled foundation pit retaining wall structure, characterized in that: The invention comprises a prefabricated water retaining plate (1) embedded in the ground layer at the edge of a foundation pit, wherein the ground layer at the edge of the foundation pit is provided with a plurality of retaining wall structures (2) arranged along the edge of the foundation pit, wherein the retaining wall structure (2) comprises wall panels (21) spliced ​​at intervals and a plug pipe (22), wherein the wall panels (21) are arranged vertically, and a bottom plate (23) is provided at the bottom side of the wall panels (21), and a casting hole (24) is provided downwardly at the bottom plate (23) and passes through the bottom plate (23), the ground, the prefabricated water retaining plate (1), and the soil layer below the prefabricated water retaining plate (1) in sequence, and further comprises a pre-positioning cylinder (25) placed inside the top of the casting hole (24) and a steel cage (26) inside the casting hole (24). , concrete is poured into the pouring hole (24), slots (221) are provided on both sides of the insert pipe (22) to be spliced ​​with the edge of the wall panel (21), the soil at the bottom end of the insert pipe (22) is hollowed out and provided with a pumping pipe (27), the pumping pipe (27) extends along the insert pipe (22) to the outside of the foundation pit and is connected to a pumping pump; the pumping pipes (27) are arranged at intervals in the arranged insert pipes (22), and the bottom ends of the remaining insert pipes (22) are provided with liquid level sensors (28), the liquid level sensors (28) are arranged along the extension direction of the pumping pipes (27), the lower ends of the liquid level sensors (28) are in contact with the prefabricated water retaining plate (1), and the upper ends are higher than the ground at the edge of the foundation pit.

2. The assembled foundation pit retaining wall structure according to claim 1 is characterized in that: The upper end of the pre-positioning cylinder (25) is provided with a connecting flange (251) fixedly connected to the bottom plate (23).

3. The assembled foundation pit retaining wall structure according to claim 2 is characterized in that: A reinforcing rib plate (211) is fixedly connected between the wall plate (21) and the bottom plate (23).

4. The assembled foundation pit retaining wall structure according to claim 3 is characterized in that: The bottom end of the insertion tube (22) is a sharpened structure.

5. The assembled foundation pit retaining wall structure according to claim 4 is characterized in that: The bottom end of the insert pipe (22) is against the top side of the prefabricated water retaining plate (1), and a plurality of through grooves (222) are provided on the wall surface of the bottom end of the insert pipe (22), and a layer of fine mesh (223) is covered on the through grooves (222).

6. The assembled foundation pit retaining wall structure according to claim 5 is characterized in that: The bottom surface of the prefabricated water retaining plate (1) is horizontal, and the two sides extend obliquely outward and upward, forming an inverted trapezoidal structure. The wall panel (21) is located above the middle of the prefabricated water retaining plate (1), and the wall panel (21) is filled with soil on one side of the foundation pit wall.

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