Foundation pit water leakage prevention structure

Abstract

The invention discloses a foundation pit water leakage preventing structure, and relates to the technical field of foundation pit supporting, the foundation pit water leakage preventing structure comprises a foundation pit body, a concrete bottom plate is poured at the bottom of the inner wall of the foundation pit body, a clamping groove is formed in the upper end of the concrete bottom plate, a collecting water tank is arranged at the upper end of the foundation pit body, and a water tank connector is formed in the side end of the collecting water tank; the device comprises a foundation pit body, at least three supporting mechanisms are arranged on the side slope of the foundation pit body, each supporting mechanism comprises a sealing supporting plate, and two water flow boxes are arranged in each sealing supporting plate. The reinforcing anchor rod can be installed, and then the two side anchor columns on the reinforcing anchor rod are inserted into the foundation pit body to form a point which interacts with the interior of the foundation pit body, so that the anchoring force between the sealing supporting plate and surrounding soil or rock is improved, and the installation stability of the sealing supporting plate is improved.

Description

Technical Field

[0001] The invention relates to the technical field of foundation pit support, and in particular to a foundation pit water leakage prevention structure. Background Art

[0002] Foundation pit engineering refers to the retaining structures, groundwater control, environmental protection and other measures required to ensure the safety and stability of the underground space formed by excavation from the ground during the construction of underground structures. Foundation pit engineering is a systematic project that integrates geological engineering, geotechnical engineering, structural engineering and geotechnical testing technology. Its main contents include engineering survey, support structure design and construction, information construction and surrounding environmental protection;

[0003] The current foundation pit anti-leakage structure is found to have at least the following technical problems:

[0004] First, the current foundation pit support plates are not sufficiently connected to the soil inside the foundation pit during installation. When encountering different terrains (such as soft soil, sand, rock and other geological layers), the support plates may become loose during installation, thereby reducing the stability of the support plate installation.

[0005] Second, the current foundation pit support plates lack an effective pressure relief mechanism for groundwater pressure, which can easily cause damage to the support structure and waterproof layer due to increased water pressure caused by high groundwater levels, such as deformation and damage of the support structure, and rupture of the waterproof layer.

[0006] Third, the current support structure does not have a separate supporting and fixing mechanism installed on its side end, so the support mechanism cannot be effectively reinforced, making it difficult to cope with the situation when the water pressure increases due to the high groundwater level. Summary of the invention

[0007] 1. Technical issues to be resolved

[0008] In view of the deficiencies in the prior art, the present invention provides a foundation pit water leakage prevention structure to solve the above-mentioned technical problems.

[0009] (II) Technical solution

[0010] To achieve the above objectives, the present invention is implemented through the following technical solutions:

[0011] A foundation pit water leakage prevention structure comprises a foundation pit body, a concrete bottom plate is cast at the bottom of the inner wall of the foundation pit body, a slot is opened at the upper end of the concrete bottom plate, a water collecting tank is opened at the upper end of the foundation pit body, a water tank interface is opened at the side end of the water collecting tank, and at least three groups of support mechanisms are provided on the slope of the foundation pit body, the support mechanism comprises a sealing support plate, two water flow boxes are arranged inside the sealing support plate, a multi-porous fork rod is fixedly installed on the left end of each of the water flow boxes, a conical head is fixedly installed on the left end of the multi-porous fork rod, a reinforcing anchor rod is slidably installed inside the multi-porous fork rod, the water flow box is installed inside the water tank interface opened in the water collecting tank, two slide grooves are equidistantly opened on the circumference of the left end surface of the reinforcing anchor rod, the two slide grooves opened by the reinforcing anchor rod are connected with side anchor columns through a rotating shaft, and springs are fixedly installed in the two slide grooves opened by the reinforcing anchor rod.

[0012] Preferably: a locking nut is threadedly connected to the circumferential surface of the right end of the reinforcing anchor rod, a mounting groove is provided at the right end of the sealing support plate, the locking nut is located in the mounting groove of the sealing support plate, the porous fork rod is connected to the interior of the water flow box, and the two springs are respectively fitted with two side anchor columns.

[0013] Preferably: a ground plug plate is fixedly installed at the lower end of the sealing support plate, and the ground plug plate is slidably installed in a slot opened in the concrete bottom plate, a sealing strip for sealing is provided between the sealing support plate and the concrete bottom plate, an L-shaped block is fixedly installed at the right end of the sealing support plate, and a locking screw is installed on the right side of the L-shaped block through a thread.

[0014] Preferably: a T-shaped mounting block is provided between every two of the sealing support plates in the three groups of support mechanisms, an insert block is fixedly installed on the left end of each of the T-shaped mounting blocks, the insert blocks on the left end of each T-shaped mounting block are inserted and installed in two adjacent sealing support plates, a reinforcement rod is slidably installed through the three T-shaped mounting blocks, the reinforcement rod is slidably installed in the L-shaped block and fits with the locking screw, and a waterstop strip for sealing is provided at the junction of every two of the sealing support plates and the foundation pit body.

[0015] (III) Beneficial effects

[0016] 1. The present invention arranges reinforcing anchor rods and side anchor columns inside the porous fork rod, so that after the sealing support plate inside the device is installed, the reinforcing anchor rod can be installed, and then the two side anchor columns on the reinforcing anchor rod are inserted into the inside of the foundation pit body to form a point of interaction force with the inside of the foundation pit body, thereby improving the anchoring force between the sealing support plate and the surrounding soil or rock mass, and improving the stability of the installation of the sealing support plate.

[0017] 2. The present invention arranges upper multi-holes on the multi-hole fork rod, and connects an upper water flow box and a collecting water tank at the rear end of the multi-hole fork rod, so that when the groundwater inside the foundation pit body is pressed into the foundation pit body by pressure, it will flow into the water flow box through the multi-hole fork rod, and then flow into the collecting water tank through the pressure, thereby completing the pressure relief of the groundwater pressure and avoiding the increase of water pressure due to the high groundwater level, which will generate a large thrust on the support structure and the waterproof layer, thereby causing deformation and damage of the support structure, rupture of the waterproof layer and other problems.

[0018] 3: The present invention installs a waterstop at the connection between each sealing support plate and the foundation pit body, and then sets a sealing strip between the sealing support plate and the concrete bottom plate, thereby providing the best sealing protection for the sealing support plate and the concrete bottom plate, preventing groundwater inside the foundation pit body from flowing into the pit of the foundation pit body through the supporting mechanism, thereby greatly improving the anti-leakage effect inside the foundation pit body.

[0019] 4: The present invention arranges T-shaped mounting blocks, insert blocks and reinforcement rods on the right sides of multiple sealing support plates, thereby reinforcing the right sides of the sealing support plates. When the sealing support plates are subjected to increased water pressure due to a high groundwater level, the reinforcement rods and T-shaped mounting blocks can exert a good force on the support structure, further avoiding deformation and damage of the support structure and rupture of the waterproof layer.

[0020] Five: The present invention arranges the supporting mechanism installed on the foundation pit body into multiple modules, so that when the supporting mechanism is installed on the foundation pit body, the installation operation can be carried out very simply, and when one of them has a problem, the damaged one can be disassembled and assembled separately, which is very convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The above description is only an overview of the technical solution of the present invention. In order to more clearly understand the technical means of the present invention and implement it according to the contents of the specification, the following is a detailed description of the preferred embodiments of the present invention in conjunction with the accompanying drawings.

[0022] Figure 1 It is a structural diagram of the present invention as a whole;

[0023] Figure 2 It is a structural diagram of the foundation pit body of the present invention;

[0024] Figure 3 It is a structural diagram of a T-shaped mounting block of the present invention;

[0025] Figure 4 It is a structural diagram of the sealing support plate of the present invention;

[0026] Figure 5 It is the structural diagram of the L-shaped block of the present invention;

[0027] Figure 6 This is a structural diagram of a multi-hole fork rod of the present invention;

[0028] Figure 7 It is a structural diagram of the reinforcement anchor rod of the present invention;

[0029] Figure 8 For the present invention Figure 7 A magnified view of the structure at A.

[0030] Legend: 11. Reinforcement anchor rod; 12. Locking nut; 13. Slide groove; 15. Side anchor column; 16. Spring; 21. Multi-hole fork rod; 22. Conical head; 24. Water flow box; 31. Sealing support plate; 32. Ground plug plate; 33. L-shaped block; 34. Locking screw; 35. Mounting groove; 36. Sealing strip; 41. Reinforcement rod; 42. T-shaped mounting block; 43. Plug block; 51. Foundation pit body; 52. Concrete bottom plate; 53. Slot; 55. Collection water tank; 56. Water tank interface. DETAILED DESCRIPTION

[0031] The following is a further detailed description of the embodiments of the present invention in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention but are not intended to limit the scope of the present invention.

[0032] Example: Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 and Figure 8As shown, in view of the problems existing in the prior art, the present invention provides a foundation pit water leakage prevention structure, including a foundation pit body 51, a concrete bottom plate 52 is cast at the bottom of the inner wall of the foundation pit body 51, a slot 53 is provided at the upper end of the concrete bottom plate 52, a water collection tank 55 is provided at the upper end of the foundation pit body 51, a water tank interface 56 is provided at the side end of the water collection tank 55, and at least three groups of supporting mechanisms are provided on the slope of the foundation pit body 51, the supporting mechanisms include a sealing supporting plate 31, two water flow boxes 24 are provided inside the sealing supporting plate 31, and each water flow box 24 The left end of the multi-hole fork rod 21 is fixedly installed with a conical head 22, and the interior of the multi-hole fork rod 21 is slidably installed with a reinforcing anchor rod 11, and the water flow box 24 is installed inside the water tank interface 56 opened in the water collection tank 55. Two chute grooves 13 are equidistantly opened on the left end surface of the reinforcing anchor rod 11, and the two chute grooves 13 opened in the reinforcing anchor rod 11 are connected with side anchor columns 15 through a rotating shaft, and the two chute grooves 13 opened in the reinforcing anchor rod 11 are fixedly installed with springs 16. When the slope is supported and water-proofed, a support mechanism needs to be added to the slope and the bottom. When the device is installed in the foundation pit body 51, each sealing support plate 31 is first inserted into the inclined edge of the foundation pit body 51 through the conical head 22 at its rear end, and then the sealing support plate 31 is completely fitted with the slope surface of the foundation pit body 51 under the movement of the conical head 22. At the same time, when multiple sealing support plates 31 are installed, a water stop strip can be installed at the connection between every two sealing support plates 31 and the foundation pit body 51, so as to protect multiple sealing support plates. The connection between the plurality of sealing support plates 31 is sealed, and when the plurality of sealing support plates 31 are installed, the water flow box 24 at the upper end thereof is also inserted into the water tank interface 56 provided in the water collecting tank 55, so that the interior of the water flow box 24 can be connected with the water collecting tank 55. The present invention arranges the support mechanism installed on the foundation pit body 51 into a plurality of modules, so that when the support mechanism is installed on the foundation pit body 51, the installation operation can be performed very simply, and when one of them has a problem, the damaged one can be disassembled and assembled separately, which is very convenient.

[0033] The right side end circumferential surface of the reinforcing anchor rod 11 is connected with a locking nut 12 through a threaded sleeve, and the right side end of the sealing support plate 31 is provided with a mounting groove 35, and the locking nut 12 is located in the mounting groove 35 provided in the sealing support plate 31, and the porous fork rod 21 is connected with the inside of the water flow box 24, and the two springs 16 are respectively fitted with the two side anchor columns 15. After the installation of multiple sealing support plates 31 is completed, the user can use a tool to knock the reinforcing anchor rod 11 on the right side of the sealing support plate 31. During the knocking process, the left end of the reinforcing anchor rod 11 is allowed to contact the inside of the slope of the foundation pit body 51, and then continue to move toward the inside of the foundation pit body 51. When the positions of the two side anchor columns 15 are completely moved out of the porous fork rod 21, the elastic force of the two springs 16 When the two side anchor columns 15 are used, a little outward force will be applied to the two side anchor columns 15. At this time, the user installs the locking nut 12 at the end of the reinforcement anchor rod 11, and then uses a tool to rotate the locking nut 12. Through the threaded connection between the locking nut 12 and the reinforcement anchor rod 11, and the installation groove 35 opened in the sealing support plate 31 limits the locking nut 12, the reinforcement anchor rod 11 can be moved to its original position. At the same time, when the two side anchor columns 15 come back, the two side anchor columns 15 will form a 90-degree angle with the reinforcement anchor rod 11 under the action of the inclined surface of their opposite surfaces. At this time, the two side anchor columns 15 are fixed inside the foundation pit body 51, and at this time, the locking nut 12 and the sealing support plate 31 are under the force of interaction, so that the sealing support plate can be 31 plays a good fixation role. The present invention arranges the reinforcing anchor rod 11 and the side anchor column 15 inside the porous fork rod 21, so that the sealing support plate 31 inside the device can be installed after installation. The reinforcing anchor rod 11 can then be installed by inserting the two side anchor columns 15 on the reinforcing anchor rod 11 into the foundation pit body 51 to form a point of interaction force with the inside of the foundation pit body 51, thereby improving the anchoring force between the sealing support plate 31 and the surrounding soil or rock mass, and improving the installation stability of the sealing support plate 31. The present invention arranges multiple holes on the porous fork rod 21, and connects the water flow box 24 and the water collection tank 55 to the rear end of the porous fork rod 21, so that the groundwater inside the foundation pit body 51 can flow to the foundation pit body under pressure. When the water is compressed inside 51, it will flow into the water flow box 24 through the porous fork rod 21, and then through the pressure, the water flow box 24 will flow into the collection water tank 55, so as to complete the pressure relief of groundwater pressure, avoid the high groundwater level causing the water pressure to increase, and produce a large thrust on the support structure and the waterproof layer, thereby causing the support structure to be deformed, damaged, the waterproof layer to rupture and other problems. The present invention installs a water stop belt at the connection between each sealing support plate 31 and the foundation pit body 51, and then sets a sealing strip 36 between the sealing support plate 31 and the concrete bottom plate 52, so as to provide the best sealing protection for the sealing support plate 31 and the concrete bottom plate 52, and avoid the groundwater inside the foundation pit body 51 from flowing into the pit of the foundation pit body 51 through the support mechanism.The water leakage prevention effect in the foundation pit body 51 is greatly improved.

[0034] The lower end of the sealing support plate 31 is fixedly installed with a ground plug plate 32, which is slidably installed in the card groove 53 opened in the concrete bottom plate 52. A sealing strip 36 for sealing is provided between the sealing support plate 31 and the concrete bottom plate 52. An L-shaped block 33 is fixedly installed at the right end of the sealing support plate 31. A locking screw 34 is installed through a thread through the right side of the L-shaped block 33. Then, by concrete pouring, the concrete bottom plate 52 is cast through a mold at the bottom of the inner wall of the foundation pit body 51. At the same time, the ground plug plate 32 at the lower end of the sealing support plate 31 is in the card groove 53 of the concrete material, so as to ensure the sealing The sealing support plate 31 is fixed for the second time, and after the sealing support plate 31 and the concrete base plate 52 are installed, the user can use the T-shaped mounting block 42 and the plug block 43 to be installed in multiple sealing support plates 31 respectively, so that multiple sealing support plates 31 can be connected, and then the reinforcement rod 41 is moved down in the T-shaped mounting block 42 and moved into the L-shaped block 33, and then the locking screw 34 is locked with a tool to complete the locking of the reinforcement rod 41. At this time, multiple T-shaped mounting blocks 42 and reinforcement rods 41 are in a stable connection state with multiple sealing support plates 31.

[0035] A T-shaped mounting block 42 is provided between every two sealing support plates 31 in the three groups of support mechanisms, and an insert block 43 is fixedly installed on the left end of each T-shaped mounting block 42. The insert block 43 on the left end of each T-shaped mounting block 42 is inserted and installed in two adjacent sealing support plates 31. A reinforcing rod 41 is slidably installed between the three T-shaped mounting blocks 42. The reinforcing rod 41 is slidably installed in the L-shaped block 33 and fits with the locking screw 34. A waterstop strip for sealing is provided at the intersection of every two sealing support plates 31 and the foundation pit body 51. The present invention arranges T-shaped mounting blocks 42, insert blocks 43 and reinforcing rods 41 on the right ends of multiple sealing support plates 31, so that the right end of the sealing support plate 31 can be reinforced, so that when the sealing support plate 31 is subjected to increased water pressure due to a high groundwater level, the reinforcing rod 41 and the T-shaped mounting block 42 can exert a good force on the support structure, thereby further avoiding deformation and damage of the support structure and rupture of the waterproof layer.

[0036] Working principle:

[0037] In the first step, when supporting and preventing water leakage on the slope in the foundation pit, it is necessary to add a support mechanism on the slope and the bottom. When the device is installed in the foundation pit body 51, each sealing support plate 31 is first inserted into the inclined edge of the foundation pit body 51 through the conical head 22 at its rear end, and then under the movement of the conical head 22, the sealing support plate 31 is completely fitted with the slope surface of the foundation pit body 51. At the same time, when multiple sealing support plates 31 are installed, a water stop strip can be installed at the connection between every two sealing support plates 31 and the foundation pit body 51, so as to provide a plurality of sealing support plates 31 with a waterproof belt. The connection of the sealing support plate 31 is sealed. When multiple sealing support plates 31 are installed, the water flow box 24 at the upper end thereof will also be inserted into the water tank interface 56 opened in the water collection tank 55, so that the interior of the water flow box 24 can be connected with the water collection tank 55. The present invention arranges the support mechanism installed on the foundation pit body 51 into multiple modules, so that when the support mechanism is installed on the foundation pit body 51, the installation operation can be carried out very simply, and when one of them has a problem, the damaged one can be disassembled and assembled separately, which is very convenient.

[0038] In the second step, after the multiple sealing support plates 31 are installed, the user can use a tool to knock the reinforcement anchor rod 11 on the right side of the sealing support plate 31. During the knocking process, the left end of the reinforcement anchor rod 11 is in contact with the inside of the slope of the foundation pit body 51, and then it continues to move toward the inside of the foundation pit body 51. When the positions of the two side anchor columns 15 are completely moved out of the interior of the multi-porous fork rod 21, the two side anchor columns 15 are exerted a little outward force under the elastic force of the two springs 16. At this time, the user installs the locking nut 12 on the end of the reinforcement anchor rod 11, and then uses a tool to rotate the locking nut 12. Through the locking nut 12 and the reinforcement anchor rod 11, the user can tighten the locking nut 12 and tighten the anchor rod 11. The threaded connection and the installation groove 35 opened in the sealing support plate 31 limit the locking nut 12, so that the reinforcement anchor rod 11 can be moved to the original position. At the same time, when the two side anchor columns 15 come back, the two side anchor columns 15 will form a 90-degree angle with the reinforcement anchor rod 11 under the action of the inclined surface on their opposite sides. At this time, the two side anchor columns 15 are fixed inside the foundation pit body 51, and the locking nut 12 and the sealing support plate 31 are under the force of interaction, so that the sealing support plate 31 can be well fixed. The present invention uses the reinforcement anchor rod 11 and the side anchor columns 15 arranged inside the porous fork rod 21, so that the sealing support plate 31 in the device can be installed. The reinforcing anchor rod 11 is installed, and then the two side anchor columns 15 on the reinforcing anchor rod 11 are inserted into the interior of the foundation pit body 51 to form a point of interaction force with the interior of the foundation pit body 51, thereby improving the anchoring force between the sealing support plate 31 and the surrounding soil or rock mass, and improving the stability of the installation of the sealing support plate 31. The present invention provides a plurality of holes on the multi-hole fork rod 21, and connects a water flow box 24 and a water collection tank 55 to the rear end of the multi-hole fork rod 21, so that the groundwater inside the foundation pit body 51 can flow into the interior of the water flow box 24 through the multi-hole fork rod 21 when it is pressed into the foundation pit body 51 by pressure, and then the water flow box 24 is compressed by pressure. 4 flows into the collecting water tank 55, thereby completing the pressure relief of the groundwater, avoiding the increase of water pressure caused by the high groundwater level, generating a large thrust on the supporting structure and the waterproof layer, thereby causing the deformation and damage of the supporting structure, the rupture of the waterproof layer and other problems. The present invention installs a water stop belt at the connection between each sealing support plate 31 and the foundation pit body 51, and then sets a sealing strip 36 between the sealing support plate 31 and the concrete bottom plate 52, so as to provide the best sealing protection for the sealing support plate 31 and the concrete bottom plate 52, avoid the groundwater inside the foundation pit body 51 from flowing into the pit of the foundation pit body 51 through the supporting mechanism, and greatly improve the anti-leakage effect in the foundation pit body 51.

[0039] In the third step, a concrete bottom plate 52 is cast through a mold at the bottom of the inner wall of the foundation pit body 51 by concrete pouring. At the same time, the ground plug plates 32 at the lower end of the sealing support plate 31 are all in the card groove 53 of the concrete material, so as to fix the sealing support plate 31 for the second time. After the sealing support plate 31 and the concrete bottom plate 52 are installed, the user can use the T-shaped mounting block 42 and the plug block 43 to respectively insert and install them in multiple sealing support plates 31, so as to connect multiple sealing support plates 31, and then move the reinforcement rod 41 downward in the T-shaped mounting block 42 and move it to the L-shaped block 33, and then use a tool to lock the locking screw 34, so as to complete the locking of the reinforcement rod 41. At this time, multiple T-shaped mounting blocks 42 and reinforcement rods 41 are in a stable connection state with multiple sealing support plates 31.

[0040] In the fourth step, the present invention arranges a T-shaped mounting block 42, an insert block 43 and a reinforcing rod 41 on the right side end of multiple sealing support plates 31, so as to reinforce the right side end of the sealing support plate 31. When the sealing support plate 31 is subjected to increased water pressure due to a high groundwater level, the reinforcing rod 41 and the T-shaped mounting block 42 can exert a good force on the supporting structure, thereby further avoiding deformation and damage of the supporting structure and rupture of the waterproof layer.

[0041] Finally, it should be noted that: Obviously, the above embodiments are only examples for clearly explaining the present invention, and are not intended to limit the implementation methods. For ordinary technicians in the relevant field, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived from this are still within the scope of protection of the present invention.

Claims

1. A foundation pit water leakage prevention structure, comprising a foundation pit body (51), characterized in that: A concrete bottom plate (52) is cast at the bottom of the inner wall of the foundation pit body (51), a slot (53) is provided at the upper end of the concrete bottom plate (52), a water collection tank (55) is provided at the upper end of the foundation pit body (51), and a water tank interface (56) is provided at the side end of the water collection tank (55); The side slope of the foundation pit body (51) is provided with at least three groups of supporting mechanisms, the supporting mechanisms comprising a sealing supporting plate (31), two water flow boxes (24) are provided inside the sealing supporting plate (31), a multi-hole fork rod (21) is fixedly installed on the left end of each water flow box (24), a conical head (22) is fixedly installed on the left end of the multi-hole fork rod (21), a reinforcing anchor rod (11) is slidably installed inside the multi-hole fork rod (21), and the water flow box (24) is installed inside a water tank interface (56) opened in a water collection tank (55); Wherein, two slide grooves (13) are equidistantly arranged on the circumference of the left end surface of the reinforcement anchor rod (11), and the two slide grooves (13) of the reinforcement anchor rod (11) are both connected to side anchor columns (15) via a rotating shaft, and springs (16) are fixedly installed in the two slide grooves (13) of the reinforcement anchor rod (11).

2. A foundation pit water leakage prevention structure according to claim 1, characterized in that: The right side end circumferential surface of the reinforcement anchor rod (11) is connected with a locking nut (12) through a threaded sleeve, and the right side end of the sealing support plate (31) is provided with a mounting groove (35); The locking nut (12) is located in a mounting groove (35) provided on the sealing support plate (31).

3. A foundation pit water leakage prevention structure according to claim 2, characterized in that: The multi-hole fork rod (21) is connected to the interior of the water flow box (24); The two springs (16) are respectively fitted with the two side anchor columns (15).

4. A foundation pit water leakage prevention structure according to claim 3, characterized in that: A ground plug plate (32) is fixedly mounted on the lower end of the sealing support plate (31), and the ground plug plate (32) is slidably mounted in a slot (53) provided in the concrete bottom plate (52); A sealing strip (36) for sealing is provided between the sealing support plate (31) and the concrete bottom plate (52).

5. A foundation pit water leakage prevention structure according to claim 4, characterized in that: An L-shaped block (33) is fixedly mounted on the right side end of the sealing support plate (31).

6. A foundation pit water leakage prevention structure according to claim 5, characterized in that: A locking screw (34) is installed on the right side of the L-shaped block (33) through a thread.

7. A foundation pit water leakage prevention structure according to claim 6, characterized in that: A T-shaped mounting block (42) is provided between each two sealing support plates (31) in the three groups of support mechanisms; Wherein, an insert block (43) is fixedly mounted on the left end of each T-shaped mounting block (42).

8. A foundation pit water leakage prevention structure according to claim 7, characterized in that: The insert block (43) at the left end of each T-shaped installation block (42) is inserted and installed in two adjacent sealing support plates (31).

9. A foundation pit water leakage prevention structure according to claim 8, characterized in that: A reinforcement rod (41) is slidably installed between the three T-shaped mounting blocks (42); The reinforcing rod (41) is slidably mounted in the L-shaped block (33) and fits closely with the locking screw (34).

10. A foundation pit water leakage prevention structure according to claim 9, characterized in that: A water stop strip for sealing is provided at the junction between every two sealing support plates (31) and the foundation pit body (51).

Images