A deep foundation pit supporting structure

Abstract

The application discloses a deep foundation pit supporting structure and belongs to the technical field of deep foundation pit supporting, which comprises a deep foundation pit and a supporting structure, the supporting structure is arranged in the deep foundation pit, and the supporting structure is composed of a supporting frame, soil nails and a drainage mechanism; the application is novel in design and ingenious in device, the soil nails are arranged in the supporting frame, each soil nail penetrates into a soil layer by a certain depth, an enlarged head is arranged at the tail end of the soil nail, the friction and the pullout resistance are increased, and therefore the stability of the deep foundation pit is improved, an annular drainage ditch is arranged in the deep foundation pit, a drainage pipe is arranged around the drainage ditch, the drainage pipe is laid at the bottom of the foundation pit, one end of the drainage pipe is communicated with a water collecting well in the drainage ditch, and the other end of the drainage pipe is arranged outside the deep foundation pit, the accumulated water is discharged outside the deep foundation pit through the water collecting well, and the whole supporting structure is jointly acted on by the soil nails and the drainage system, so that the sliding and collapse of the soil bodies on both sides of the deep foundation pit are effectively prevented, and the construction safety is ensured.

Description

Technical Field

[0001] This application relates to the field of deep foundation pit support technology, and in particular to a deep foundation pit support structure. Background Technology

[0002] Deep foundation pits refer to projects with an excavation depth exceeding 5 meters (including 5 meters), or projects with particularly complex geological conditions, surrounding environment, and underground pipelines even if the depth does not exceed 5 meters. The earthwork excavation, support, and dewatering of foundation pits (trenches) with an excavation depth exceeding 5 meters (including 5 meters) are included. Foundation pit engineering mainly includes the design and construction of foundation pit support systems and earthwork excavation. It is a highly comprehensive system engineering project that requires close cooperation between geotechnical engineering and structural engineering technicians.

[0003] Traditional deep foundation pit support methods mainly include sheet piles, cast-in-place concrete piles, and anchor bolts. These methods can meet the support requirements to a certain extent, but their stability is poor under complex geological conditions, such as soft soil layers and high groundwater levels, which can easily lead to safety accidents. In addition, traditional support methods have long construction cycles, high costs, and significant environmental impacts. Therefore, new support technologies are urgently needed to improve safety, reduce construction costs, and reduce environmental pollution.

[0004] Therefore, this application proposes a deep foundation pit support structure. Utility Model Content

[0005] This application proposes a deep foundation pit support structure to solve the problems mentioned in the background art. Soil nails are installed within the support frame, each penetrating a certain depth into the soil. The ends of the soil nails are equipped with enlarged heads to increase friction and pull-out resistance, thereby improving the stability of the deep foundation pit. A circular drainage ditch is constructed within the deep foundation pit, with a drainage pipe installed around each circumference. The drainage pipes are laid at the bottom of the foundation pit, with one end connected to a sump in the drainage ditch and the other end draining out of the deep foundation pit. The accumulated water is discharged out of the deep foundation pit through the sump. The entire support structure utilizes the soil nails and drainage system...

[0006] This mechanism effectively prevents the slippage and collapse of soil on both sides of the deep foundation pit, ensuring construction safety. To achieve the above objectives, this application adopts the following technical solution:

[0007] A deep foundation pit support structure includes a deep foundation pit and a support structure. The support structure is located inside the deep foundation pit and consists of a support frame, soil nails, and a drainage mechanism. The support frame is installed on the inner wall of the deep foundation pit, the soil nails are arranged inside the support frame, and the drainage mechanism is located at the bottom of the deep foundation pit.

[0008] In a preferred embodiment, the support frame consists of main beams, columns, and secondary beams. The main beams are divided into upper and lower sections, and each column is connected between the upper and lower sections of the main beam by fixing screws. The main beams, secondary beams, and columns are made of Q345B high-strength steel, and the screws are made of 8.8 grade high-strength steel.

[0009] The bolts are used to enhance the overall robustness of the support frame, thereby improving the practicality of the device.

[0010] In a preferred embodiment, each of the secondary beams is welded to both ends with arc-shaped mounting blocks, and both ends of each secondary beam are mounted on the column using mounting screws via the arc-shaped mounting blocks.

[0011] By using the arc-shaped mounting blocks at both ends of the secondary beam to fix them to the column with mounting screws, a stable support frame is formed, thereby improving the practicality of the device.

[0012] In a preferred embodiment, a number of soil nails are arranged inside the support frame, and each soil nail penetrates into the soil layer to a certain depth.

[0013] By placing soil nails within the support frame, with each nail penetrating a certain depth into the soil, the stability of the deep foundation pit is improved, thereby enhancing the practicality of the device.

[0014] In a preferred embodiment, each soil nail is provided with an enlarged head at its end;

[0015] The practicality of the device is improved by adding an enlarged head at the end of the soil nail to increase friction and pull-out resistance.

[0016] In a preferred embodiment, the drainage mechanism includes a drainage ditch, a collection well, and a drainage outlet.

[0017] The drainage ditch is located on the periphery of the bottom end of the deep foundation pit;

[0018] By draining accumulated water from the deep foundation pit through a sump, the entire support structure, through the combined action of soil nails and a drainage system, effectively prevents the slippage and collapse of the soil on both sides of the deep foundation pit, ensuring construction safety and thus improving the practicality of the device.

[0019] In a preferred embodiment, a water collection well is provided around the drainage ditch, and a drainage pipe is provided in each water collection well;

[0020] By creating a circular drainage ditch inside the deep foundation pit, with a drainage pipe installed around each side of the ditch, and laying the drainage pipes at the bottom of the pit, one end of which connects to a collection well in the drainage ditch, and the other end of which drains out of the deep foundation pit, the practicality of the device is improved.

[0021] The beneficial effects of this application are:

[0022] In this deep foundation pit support structure, during operation, main beams and columns are first arranged around the deep foundation pit and fixed to the foundation by fixing screws. Then, secondary beams are installed in sequence, and the arc-shaped mounting blocks at both ends of the secondary beams are fixed to the columns by mounting screws to form a stable support frame. Subsequently, soil nails are laid in the support frame, and each soil nail penetrates into the soil to a certain depth. The soil nails greatly improve the practicality of the device.

[0023] This deep foundation pit support structure, through the installation of a drainage system, involves opening a circular drainage ditch inside the deep foundation pit. A drainage pipe is installed around the perimeter of the drainage ditch and laid at the bottom of the foundation pit. One end of the drainage pipe is connected to a sump in the drainage ditch, and the other end drains out of the deep foundation pit. The accumulated water is discharged out of the deep foundation pit through the sump. The entire support structure, through the combined action of soil nails and the drainage system, effectively prevents the slippage and collapse of the soil on both sides of the deep foundation pit, ensures construction safety, and greatly improves the practicality of the device. Attached Figure Description

[0024] Figure 1 is a schematic diagram of the main body of the device of this application;

[0025] Figure 2 is an enlarged view of section A in Figure 1 of this application;

[0026] Figure 3 is a schematic diagram of the support frame connection of the device of this application;

[0027] Figure 4 is a top view of the interior of the deep foundation pit of the device of this application;

[0028] Figure 5 is a schematic diagram of the soil nailing device of this application.

[0029] The diagram labels are as follows: 1. Deep foundation pit; 2. Support structure; 21. Support frame; 211. Main beam; 2111. Fixing screw; 212. Column; 213. Secondary beam; 2131. Arc-shaped mounting block; 2132. Mounting screw; 22. Soil nail; 221. Enlarged head; 23. Drainage mechanism; 231. Drainage ditch; 232. Sump; 233. Drainage pipe. Detailed Implementation

[0030] The technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments.

[0031] Referring to Figures 1-5, a deep foundation pit support structure includes a deep foundation pit 1 and a support structure 2. The support structure 2 is disposed inside the deep foundation pit 1 and consists of a support frame 21, soil nails 22, and drainage system.

[0032] The mechanism 23 consists of a support frame 21 installed on the inner wall of the deep foundation pit 1, and soil nails 22 placed on the support frame.

[0033] Inside frame 21, drainage mechanism 23 is installed at the bottom of the deep foundation pit 1.

[0034] Referring to Figures 1-3, the support frame 21 consists of main beams 211, columns 212, and secondary beams 213.

[0035] The beam 211 is divided into upper and lower sections, and each column 212 is connected between the upper and lower sections of the main beam 211 by fixing screws 2111. The main beam 211, secondary beam 212 and column 213 are made of Q345B high-strength steel and the screws are made of 8.8 grade high-strength bolts to enhance the overall rigidity of the support frame 21, thereby improving the practicality of the device.

[0036] Referring to Figures 1-3, each secondary beam 213 has an arc-shaped mounting block 2131 welded to both ends, and each

[0037] Both ends of the secondary beam 213 are mounted on the column 212 using mounting screws 2132 via arc-shaped mounting blocks 2131.

[0038] Above; by using the arc-shaped mounting blocks 2131 at both ends of the secondary beam 213 to fix them to the column 212 with mounting screws 2132, a stable support frame 21 is formed, thereby improving the practicality of the device.

[0039] Referring to Figures 1-5, a number of soil nails 22 are arranged inside the support frame 21, each soil nail 22 penetrating into the soil layer to a certain depth; by arranging soil nails 22 inside the support frame 21, each soil nail 22 penetrates into the soil layer.

[0040] A certain depth improves the stability of the deep foundation pit 1, thereby enhancing the practicality of the device.

[0041] Referring to Figures 1, 2, 3, and 5, each soil nail 22 is provided with an enlarged head 221 at its end; by providing an enlarged head 221 at the end of the soil nail 22, the friction and pull-out resistance are increased, thereby improving the practicality of the device.

[0042] Referring to Figures 1, 4, and 5, the drainage mechanism 23 includes a drainage ditch 231, a collection well 232, and a drainage pipe 233. The drainage ditch 231 is located on the periphery of the bottom of the deep foundation pit 1; the collection well 232 drains accumulated water.

[0043] Apart from the deep foundation pit 1, the entire support structure 2, through the combined action of soil nails 22 and the drainage system, has...

[0044] This effectively prevents the soil on both sides of the deep foundation pit from sliding and collapsing, ensuring construction safety and thus improving the practicality of the device.

[0045] Referring to Figures 1 and 4, a collection well 232 is provided around the perimeter of the drainage ditch 231, and a drainage pipe 233 is installed in each collection well 232; by opening a ring-shaped drainage ditch 231 in the deep foundation pit 1, and opening a drainage pipe 233 around the perimeter of the drainage ditch 231, the drainage pipes 233 are laid at the bottom of the foundation pit.

[0046] One end is connected to the water collection well 232 in the drainage ditch 231, and the other end is discharged to the outside of the deep foundation pit 1, thereby improving the practicality of the device.

[0047] Working principle: During the operation, main beams 211 and columns 212 are first arranged around the deep foundation pit 1 and fixed to the foundation by fixing screws 2111. Then, secondary beams 213 are installed in sequence, and the arc-shaped mounting blocks 2131 at both ends of the secondary beams 213 are fixed to the columns 212 by mounting screws 2132.

[0048] A stable support frame 21 is formed. Subsequently, soil nails 22 are installed within the support frame 21, with each soil nail 22 penetrating a certain depth into the soil layer. The ends of the soil nails 22 are equipped with enlarged heads 221 to increase friction.

[0049] To improve the stability of the deep foundation pit 1, the following measures are taken: first, to increase the tensile strength and pull-out resistance; second, to improve the stability of the deep foundation pit 1; and third, to install a drainage system. A circular drainage ditch 231 is constructed within the deep foundation pit 1, and a drainage pipe 233 is installed around each of the four sides of the drainage ditch 231. The drainage pipes 233 are laid at the bottom of the foundation pit, with one end connected to a collection well 232 in the drainage ditch 231.

[0050] The other end drains out of the deep foundation pit 1, and the accumulated water is discharged out of the deep foundation pit 1 through the water collection well 232. The entire support...

[0051] The retaining structure 2, through the combined action of soil nails 22 and the drainage system, effectively prevents the slippage and collapse of the soil on both sides of the deep foundation pit 1, ensuring construction safety.

[0052] The main beam 211, secondary beam 212, and column 213 are made of Q345B high-strength steel. The bolts are grade 8.8 high-strength bolts. The soil nails 22 are made of HRB400 steel bars with a diameter of φ25mm, and their length is determined according to actual conditions, typically 10m to 15m. The drainage pipe 233 is made of PVC material with a diameter of 110mm. The above description is only a preferred embodiment of this application, but the scope of protection of this application is not limited to...

[0053] Not limited to this, any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in this application, based on the technical solution and utility model concept of this application, should be included within the protection scope of this application.

Claims

1. A deep foundation pit support structure, comprising a deep foundation pit (1) and a support structure (2), characterized in that, The support structure (2) is set inside the deep foundation pit (1). The support structure (2) consists of a support frame (21), soil nails (22) and a drainage mechanism (23). The support frame (21) is installed on the inner wall of the deep foundation pit (1). The soil nails (22) are arranged inside the support frame (21). The drainage mechanism (23) is set at the bottom inside the deep foundation pit (1).

2. The deep foundation pit support structure according to claim 1, characterized in that, The supporting frame (21) consists of a main beam (211), columns (212), and secondary beams (213). (211) Divided into upper and lower sections, each column (212) is connected to the main beam by fixing screws (2111). (211) Between the upper and lower segments.

3. The deep foundation pit support structure according to claim 2, characterized in that, Each of the secondary beams (213) has an arc-shaped mounting block (2131) welded to both ends, and each of the secondary beams (213) is mounted on the column (212) by mounting screws (2132) through the arc-shaped mounting block (2131).

4. The deep foundation pit support structure according to claim 1, characterized in that, The support frame (21) is provided with a number of soil nails (22), each of which penetrates into the soil layer to a certain depth.

5. A deep foundation pit support structure according to claim 4, characterized in that, Each of the soil nails (22) is provided with an enlarged head (221) at its end.

6. The deep foundation pit support structure according to claim 1, characterized in that, The drainage mechanism (23) includes a drainage ditch (231), a water collection well (232) and a drainage pipe (233), wherein the drainage ditch (231) is located on the periphery of the bottom of the deep foundation pit (1).

7. A deep foundation pit support structure according to claim 6, characterized in that, The row A water collection well (232) is provided around the water ditch (231), and a drain pipe (233) is provided in each of the water collection wells (232).

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