Foundation pit inner supporting structure for semi-reverse construction of underground structure

Abstract

The utility model relates to the field of foundation pit supporting, in particular to a foundation pit inner supporting structure for semi-reverse construction of an underground structure, which comprises a supporting plate. The device further comprises a through groove, water permeable holes, a mounting groove, a baffle, a sliding rod, a shifting block and a notch, the through groove is formed in the top surface of the supporting plate, the water permeable holes distributed in an array mode are formed in the front side surface of the supporting plate, the mounting groove is formed in the lower position of the rear side surface of the supporting plate, and the baffle is inserted into the top of the inner surface of the mounting groove in a sliding connection mode. Through the arrangement of the water permeable holes, after the supporting plate and the side wall of the foundation pit are installed in an attached mode, water leaked from the side wall of the foundation pit can flow into the through groove of the supporting plate through the water permeable holes, then the sliding rod and the baffle are driven by the shifting block to move upwards by shifting the shifting block, the bottom of the installation groove can be opened, and therefore the leaked water can be discharged; and the problem that the soil texture of the side wall of the foundation pit is soft and collapsed due to the fact that accumulated water cannot be discharged in time is solved.

Description

Technical Field

[0001] This utility model relates to the field of foundation pit support, and in particular to an internal support structure for foundation pit construction using a semi-reverse construction method for underground structures. Background Technology

[0002] Foundation pit support is a temporary support, reinforcement and protection measure taken for the sidewalls and surrounding environment of the foundation pit to ensure the safety of underground structure construction and the surrounding environment. These measures aim to prevent the collapse of the foundation pit walls and protect surrounding buildings, underground pipelines, roads and soil and groundwater from the impact of foundation pit excavation.

[0003] The existing underground structure semi-reverse construction method for the foundation pit support structure does not have a drainage structure when in use. This makes it impossible to drain the water seeping from the foundation pit sidewall in time, resulting in the sidewall soil always having a high water content, which easily leads to the problem of softness and collapse.

[0004] Therefore, the existing underground structure semi-reverse construction method for foundation pit support structures lacks drainage features, preventing timely drainage of water seeping from the pit sidewalls. This results in consistently high soil moisture content, making the soil prone to softening and collapse. A new underground structure for foundation pit support using the semi-reverse construction method can be designed. By incorporating permeable holes, after the support plate is installed flush with the pit sidewalls, water seeping from the sidewalls can flow into the grooves of the support plate. Then, by moving a lever, the sliding rod and baffle can be raised, opening the bottom of the installation groove and draining the seeping water. This prevents water accumulation and subsequent soil softening and collapse of the pit sidewalls. Utility Model Content

[0005] In order to overcome the problem that the existing underground structure semi-reverse construction method of the foundation pit support structure does not have a drainage structure when in use, it is impossible to drain the water seeping from the foundation pit sidewall in time, resulting in the sidewall soil having a high water content and being prone to softness and collapse.

[0006] The technical solution of this utility model is as follows: a foundation pit support structure for semi-reverse construction of underground structures, including a support plate; it also includes a through groove, permeable holes, an installation groove, a baffle, a sliding rod, a lever, and a slot. The top surface of the support plate has a through groove, the front surface of the support plate has a plurality of arrayed permeable holes, the rear surface of the support plate has an installation groove at the lower position, the top of the inner surface of the installation groove is slidably connected to a baffle, the front surface of the baffle has one end of a sliding rod at the upper middle position, the other end of the sliding rod is connected to a lever, and the rear surface of the support plate has a slot above the installation groove, with the sliding rod slidably connected to the slot.

[0007] Preferably, by setting permeable holes, after the support plate is installed in close contact with the side wall of the foundation pit, the water seeping from the side wall of the foundation pit can flow into the through groove of the support plate through the permeable holes. Then, by moving the lever, the sliding rod and the baffle are moved up, which can open the bottom of the installation groove, thereby draining the seeping water and preventing the water from accumulating and causing the soil of the foundation pit side wall to become soft and collapse. This solves the problem that the support plate of the existing semi-reverse construction method of underground structure foundation pit support structure does not have a drainage structure when in use, which makes it impossible to drain the water seeping from the foundation pit side wall in time, resulting in the soil of the side wall always having a high water content and being prone to softness and collapse.

[0008] Preferably, the inner surface of the mounting groove is provided with limit grooves on both the left and right sides, and the left and right surfaces of the baffle are provided with limit blocks, which are slidably connected to the limit grooves.

[0009] Preferably, connecting rods are provided on both the left and right sides of the outer surface of the lever, and positioning screws are provided on the rear side of the two connecting rods away from the lever. Positioning holes are provided on both the left and right sides of the rear surface of the support plate located in the groove, and the positioning screws match the positioning holes.

[0010] Preferably, L-shaped inserts are provided on both the left and right surfaces of the support plate, and the two L-shaped inserts are matched.

[0011] Preferably, two symmetrical hinge seats are provided on the upper part of the rear surface of the support plate. One end of the support rod is rotatably connected to the inner surface of the hinge seat, and a pad is provided on the other end of the support rod.

[0012] Preferably, a water flow plate is provided on the rear surface of the support plate below the mounting groove, and filter plates are provided on both the left and right sides of the inner surface of the water flow plate.

[0013] Preferably, a base plate is provided on the bottom surface of the support plate, and fixing bolts are provided at the corners of the bottom surface of the base plate. The base plate is fixed to the support plate by the fixing bolts.

[0014] The beneficial effects of this utility model are:

[0015] 1. By setting permeable holes, after the support plate is installed in close contact with the side wall of the foundation pit, the water seeping from the side wall of the foundation pit can flow into the through groove of the support plate through the permeable holes. Then, by moving the lever, the sliding rod and the baffle are moved up, which can open the bottom of the installation groove, thereby draining the seeping water and preventing the water from accumulating and causing the soil of the foundation pit side wall to become soft and collapse. This solves the problem that the support plate of the existing semi-reverse construction method of underground structure foundation pit support structure does not have a drainage structure when in use, which makes it impossible to drain the water seeping from the foundation pit side wall in time, resulting in the side wall soil always having a high water content and being prone to softness and collapse. Attached Figure Description

[0016] Figure 1 The diagram shown is a three-dimensional structural schematic of the internal support structure of an underground structure constructed using a semi-reverse construction method according to this utility model.

[0017] Figure 2 The diagram shows a three-dimensional structural design of the support plate for the foundation pit in a semi-reverse construction method for underground structures according to this utility model.

[0018] Figure 3 The diagram shows a three-dimensional structural design of an installation groove for a support structure inside a foundation pit during the semi-reverse construction method of an underground structure, according to this utility model.

[0019] Figure 4 The diagram shows a three-dimensional structural schematic of a support structure baffle plate for a foundation pit constructed using a semi-reverse construction method for underground structures, according to this utility model.

[0020] Figure 5 The diagram shown is a three-dimensional structural diagram of the foundation slab of the underground structure support structure in the pit constructed using the semi-reverse construction method of this utility model.

[0021] Explanation of reference numerals in the attached drawings: 1. Support plate; 2. Through groove; 3. Water permeable hole; 4. Mounting groove; 5. Baffle; 6. Slide rod; 7. Pulley; 8. Groove opening; 9. Limiting groove; 10. Limiting block; 11. Connecting rod; 12. Positioning screw; 13. Positioning hole; 14. L-shaped insert plate; 15. Hinge seat; 16. Support rod; 17. Pad plate; 18. Flow plate; 19. Filter plate; 20. Base plate; 21. Fixing bolt. Detailed Implementation

[0022] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0023] Please see Figures 1-5This utility model provides an embodiment of an internal support structure for a foundation pit constructed using a semi-reverse construction method for underground structures. The structure includes a support plate 1; it also includes a through groove 2, permeable holes 3, an installation groove 4, a baffle 5, a sliding rod 6, a lever 7, and a slot 8. The top surface of the support plate 1 has the through groove 2. The front surface of the support plate 1 has a plurality of arrayed permeable holes 3. The rear surface of the support plate 1 has an installation groove 4 located at a lower position. A baffle 5 is slidably inserted into the top of the inner surface of the installation groove 4. One end of the sliding rod 6 is located at the upper middle position of the front surface of the baffle 5. The other end of the sliding rod 6 is connected to a lever 7. The rear surface of the support plate 1 has a slot 8 located above the installation groove 4. The sliding rod 6 and the slot 8... The sliding connection, with permeable holes 3, allows water seeping from the pit sidewall to flow into the through groove 2 of the support plate 1 after the support plate 1 is installed in close contact with the pit sidewall. Then, by moving the lever 7, the sliding rod 6 and the baffle 5 are moved upward, opening the bottom of the installation groove 4 and draining the seeping water. This prevents water from accumulating and causing the soil on the pit sidewall to become soft and collapse. This solves the problem that the existing semi-reverse construction method of underground structure pit support structure does not have a drainage structure, which prevents the timely drainage of water seeping from the pit sidewall, resulting in the soil on the sidewall always having a high water content and being prone to softness and collapse.

[0024] Please see Figures 1-4 In this embodiment, limiting grooves 9 are provided on both the left and right sides of the inner surface of the mounting groove 4, and limiting blocks 10 are provided on both the left and right sides of the baffle 5. The limiting blocks 10 are slidably connected to the limiting grooves 9. By setting the limiting blocks 10 and the limiting grooves 9, the limiting blocks 10 can be driven to slide synchronously inside the limiting grooves 9 when the baffle 5 moves up and down, thereby improving the stability of the movement of the baffle 5. Connecting rods 11 are provided on both the left and right sides of the outer surface of the lever 7. Positioning screws 12 are provided on the rear surface of the two connecting rods 11 away from the lever 7. The rear of the support plate 1... Positioning holes 13 are provided on both the left and right sides of the side surface at the slot 8. Positioning screws 12 are matched with positioning holes 13. By setting positioning screws 12 and positioning holes 13, after the baffle 5 is moved up, the positioning screws 12 can be screwed into the interior of the positioning holes 13, thereby positioning the baffle 5 and keeping it in a raised state. L-shaped inserts 14 are provided on both the left and right sides of the support plate 1. The two L-shaped inserts 14 are matched. By setting L-shaped inserts 14, it is easy for workers to insert and assemble the two support plates 1, which improves the installation efficiency.

[0025] Please see Figures 1-5In this embodiment, two symmetrical hinge seats 15 are provided on the upper part of the rear surface of the support plate 1. One end of the support rod 16 is rotatably connected to the inner surface of the hinge seat 15, and a pad 17 is provided on the other end of the support rod 16. By providing the support rod 16, lateral support can be provided for the support plate 1, forming a triangle with the ground and the support plate 1, thereby improving the support strength. A water flow plate 18 is provided on the lower side of the rear surface of the support plate 1, located below the mounting groove 4. Filter plates 19 are provided on both the left and right sides of the inner surface of the water flow plate 18. By setting up the flow plate 18, the water flowing out of the installation groove 4 will be guided by the flow plate 18 into the main water inlet of the foundation pit. The filter plate 19 can filter the mud and sand mixed in the water to avoid clogging. The bottom surface of the support plate 1 is provided with a base plate 20. Fixing bolts 21 are provided at the corners of the bottom surface of the base plate 20. The base plate 20 is fixed to the support plate 1 by fixing bolts 21. By setting up fixing bolts 21, the base plate 20 can be easily disassembled and assembled, thereby facilitating the cleaning of mud and sand inside the support plate 1.

[0026] During operation, by setting the limiting block 10 and the limiting groove 9, the limiting block 10 can be driven to slide synchronously inside the limiting groove 9 when the baffle 5 moves up and down, thereby improving the stability of the movement of the baffle 5. By setting the positioning screw 12 and the positioning hole 13, after the baffle 5 is moved up, the positioning screw 12 can be screwed into the positioning hole 13 to position the baffle 5 and keep it in the raised state. By setting the L-shaped insert plate 14, it is easy for the workers to insert and assemble the two support plates 1, improving the installation efficiency. By setting the support rod 16, it can provide side support for the support plate 1, forming a triangle with the ground and the support plate 1, thereby improving the support strength. By setting the water flow plate 18, the water flowing out of the installation groove 4 will be guided by the water flow plate 18 into the main water inlet of the foundation pit. The filter plate 19 can filter the mud and sand mixed in the water to avoid clogging. By setting the fixing bolt 21, it is easy to disassemble and assemble the bottom plate 20, thereby facilitating the cleaning of mud and sand inside the support plate 1.

[0027] Through the above steps, by setting permeable holes 3, after the support plate 1 is installed in close contact with the side wall of the foundation pit, the water seeping from the side wall of the foundation pit can flow into the through groove 2 of the support plate 1 through the permeable holes 3. Then, by moving the lever 7, it can drive the sliding rod 6 and the baffle 5 to move upward, which can open the bottom of the installation groove 4, thereby draining the seeping water and avoiding the problem of water accumulation not being able to be drained in time, which would cause the soil of the foundation pit side wall to become soft and collapse. This solves the problem that the support plate of the existing underground structure semi-reverse construction method foundation pit support structure does not have a drainage structure when in use, which cannot allow the water seeping from the foundation pit side wall to be drained in time, resulting in the side wall soil always having a high water content and being prone to softness and collapse.

Claims

1. A support structure in a foundation pit for construction of a semi-top-down method of an underground structure, comprising a support plate (1); characterized in that: It also includes a slot (2), a water hole (3), a mounting slot (4), a baffle (5), a sliding rod (6), a block (7) and a notch (8), the top surface of the support plate (1) is provided with a slot (2), the front surface of the support plate (1) is provided with a plurality of arrayed water holes (3), the lower position of the rear surface of the support plate (1) is provided with a mounting slot (4), the inner surface of the mounting slot (4) is inserted into the sliding connection with the baffle (5), the front surface of the baffle (5) is provided with one end of the sliding rod (6) at the upper position, the other end of the sliding rod (6) is connected with the block (7), the rear surface of the support plate (1) is provided with a notch (8) above the mounting slot (4), and the sliding rod (6) is in sliding connection with the notch (8).

2. The supporting structure in a foundation pit for a top-down method of constructing an underground structure according to claim 1, wherein: The inner surface of the mounting slot (4) is provided with a limiting slot (9) on the left and right sides, and the left and right surfaces of the baffle (5) are provided with limiting blocks (10), the limiting blocks (10) and the limiting slots (9) are in sliding connection.

3. The supporting structure in a foundation pit for underground structure half top-down method construction according to claim 1, characterized in that: The outer surface of the block (7) is provided with a connecting rod (11) on the left and right sides, the rear surface of the two connecting rods (11) is provided with a positioning screw (12) away from the block (7), the rear surface of the support plate (1) is provided with a positioning hole (13) on the left and right sides of the notch (8), and the positioning screw (12) is matched with the positioning hole (13).

4. The underground structure half top-down method construction foundation pit support structure according to claim 1, characterized in that: The left and right surfaces of the support plate (1) are provided with L-shaped plugs (14), and the two L-shaped plugs (14) are matched.

5. The underground structure half top-down method construction foundation pit support structure according to claim 1, characterized in that: The rear surface of the support plate (1) is provided with two symmetrical hinge seats (15) at the upper position, one end of the hinge seat (15) is rotatably connected with the inner surface of the support plate (1), and the other end of the hinge seat (15) is provided with a pad (17).

6. The underground structure half top-down method construction foundation pit support structure according to claim 1, characterized in that: The rear surface of the support plate (1) is provided with a water flow plate (18) below the mounting slot (4), and the inner surface of the water flow plate (18) is provided with a filter plate (19) on the left and right sides.

7. The underground structure half top-down method construction foundation pit support structure according to claim 1, characterized in that: The bottom surface of the support plate (1) is provided with a bottom plate (20), and the bottom surface of the bottom plate (20) is provided with a fixing screw (21) at the corner position, and the bottom plate (20) is fixed with the support plate (1) through the fixing screw (21).

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