Water stop enclosure structure of foundation pit

Abstract

The utility model belongs to the technical field of building foundation pit support, and particularly discloses a water stop support structure of a foundation pit, which comprises concrete piles arranged on the peripheral side of the foundation pit, a reinforcing mesh fixedly arranged between two adjacent concrete piles, a concrete layer formed by spraying concrete on the reinforcing mesh, and a water stop plate arranged on the outer side of the concrete layer. The bottom of the water stop plate is connected with the bottom of the foundation pit through a first fixing mechanism, and the top of the water stop plate is connected with the concrete layer through a second fixing mechanism. According to the utility model, the concrete layer is arranged between the concrete piles and the water stop plate, so that gaps between the concrete piles are filled, and the overall water stop and support performance is improved; the water stop plate is fixed through the first fixing mechanism and the second fixing mechanism, the fixing effect is guaranteed, meanwhile, excessive occupation of the internal space of the foundation pit is avoided, and construction of the foundation pit is facilitated.

Description

TECHNICAL FIELD

[0001] The utility model belongs to building foundation pit support technology field especially relates to the water stop support structure of foundation pit. BACKGROUND

[0002] In the field of construction engineering, foundation pit engineering is the basic engineering of underground space development and utilization. With the acceleration of urbanization process, high-rise buildings, underground rail transit, large underground commercial complexes and other projects are emerging, and the scale and depth of foundation pit engineering are also increasing. The water stop support structure of foundation pit plays a crucial role in foundation pit engineering. Its main function is to prevent groundwater from flowing into the foundation pit, ensure the dryness of the working environment during foundation pit excavation and foundation construction, and also support the surrounding soil to prevent soil collapse and protect the safety of surrounding buildings, underground pipelines and other infrastructure.

[0003] The Chinese patent with publication number CN219261045U discloses a partial interlocking pile and grouting water stop deep foundation pit support structure, which realizes water stop by interconnecting the interlocking pile bodies. The interlocking pile bodies are connected by a clamping groove and a clamping block, forming a circular shape with two semicircular grooves, and the steel reinforcement cage is installed and the concrete is poured to form a continuous support structure. However, in this scheme, the limiting frame has a large area, which occupies more internal space of the foundation pit, limits the operation range of the construction equipment, affects the activity space of the construction personnel, makes the material transportation and storage inconvenient, interferes with the installation of the steel reinforcement cage in the pile, concrete pouring and other operations, and reduces the construction efficiency. UTILITY MODEL CONTENTS

[0004] The utility model aims to overcome the defects in the prior art and provide a water stop support structure for foundation pit.

[0005] The utility model provides a water stop support structure for foundation pit, which comprises a concrete pile arranged on the side of the foundation pit, a steel mesh fixedly arranged between two adjacent concrete piles, a concrete layer formed by spraying concrete on the steel mesh, a water stop plate arranged on the outer side of the concrete layer, a first fixing mechanism connecting the bottom of the water stop plate with the bottom of the foundation pit, and a second fixing mechanism connecting the top of the water stop plate with the concrete layer.

[0006] Further, a corbel is poured on the top of the concrete pile, and the top of the water stop plate abuts against the bottom of the corbel.

[0007] Further, the first fixing mechanism comprises a connecting plate, one side of the connecting plate abuts against the water stop plate, a bent plate is arranged at the bottom of the connecting plate, a connecting sleeve is arranged at the end of the bent plate, a pin is arranged in the connecting sleeve, and the pin penetrates through the connecting sleeve and is inserted into the bottom of the foundation pit.

[0008] The top plate is arranged on the side of the connecting sleeve close to the water stop plate and abuts against the water stop plate.

[0009] Further, the bending plate is bent away from the water stop plate, and an end of the bending plate away from the water stop plate is perpendicular to the water stop plate.

[0010] Further, a reinforcing member is arranged on the side of the bending plate away from the water stop plate and is attached to the bending plate.

[0011] Further, wooden frames are arranged between the connecting plate and the water stop plate and between the top plate and the water stop plate.

[0012] Further, the second fixing mechanism comprises a pre-buried plate pre-buried in the concrete layer, a screw rod arranged on the side of the pre-buried plate away from the concrete layer, the screw rod penetrating through the water stop plate and extending to the outside of the water stop plate, a nut arranged on the end of the screw rod, the nut being threadedly connected with the screw rod, and a gasket arranged between the nut and the screw rod.

[0013] Compared with the prior art, the utility model has the advantages that:

[0014] The utility model discloses a concrete pile and water stop plate are arranged between concrete layer and fill the gap between concrete pile, improve integral water stop and support performance, water stop plate directly blocks groundwater, and concrete pile, concrete layer jointly form complete water stop system, effectively prevent groundwater from gushing into the foundation pit, guarantee dry construction environment in the foundation pit, through first fixed mechanism and second fixed mechanism are fixed to water stop plate, guarantee fixed effect while avoiding too much occupation inside space of the foundation pit, convenient for the construction of the foundation pit.

[0015] The first fixing mechanism of the utility model comprises a connecting plate, a bending plate, a connecting sleeve and a pin, and stably connects the bottom of the water stop plate and the bottom of the foundation pit, the connecting plate and the top plate abut against the water stop plate, increases the contact area, and makes the connection more reliable, the pin penetrates through the connecting sleeve and is inserted into the bottom of the foundation pit, effectively fixes the water stop plate, guarantees the position stability, the bending plate is bent away from the water stop plate and the end thereof is perpendicular to the water stop plate, increases the mechanical stability of the bending plate, can better bear the force from the water stop plate and the bottom of the foundation pit, prevents the bottom of the water stop plate from being inclined or displaced, guarantees that the water stop plate always keeps perpendicular to the bottom of the foundation pit, and therefore guarantees that the water stop effect is not influenced.

[0016] The second fixing mechanism of this utility model securely connects the top of the waterstop plate to the concrete layer through an embedded plate, screw, nut, and washer pre-embedded in the concrete layer. The embedded plate ensures the stability of the connection, the screw passes through the waterstop plate and is tightened with the nut, and the washer increases the tightness of the connection, preventing the top of the waterstop plate from loosening and ensuring that the waterstop plate plays a stable water-stopping role in the entire foundation pit water-stopping retaining structure. Attached Figure Description

[0017] The following figures are for illustrative purposes only and are not intended to limit the scope of the present invention.

[0018] Figure 1 : A schematic diagram of the structure of this utility model;

[0019] Figure 2 : Schematic diagram of the first fixed mechanism;

[0020] Figure 3 : Schematic diagram of the first fixed mechanism in its fixed state;

[0021] Figure 4 Schematic diagram of the second fixing mechanism:

[0022] In the diagram: 1. Foundation pit; 2. Concrete column; 3. Reinforcing mesh; 4. Concrete layer; 5. Waterstop; 6. Crown beam; 7. First fixing mechanism; 8. Second fixing mechanism; 9. Shim; 10. Timber; 11. Connecting plate; 12. Fastening bolt; 13. Bending plate; 14. Top plate; 15. Connecting sleeve; 16. Reinforcing member; 17. Pin; 18. Embedded plate; 19. Screw; 20. Nut. Detailed Implementation

[0023] To make the objectives, technical solutions, design methods, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are for illustrative purposes only and are not intended to limit the scope of this utility model.

[0024] like Figure 1 As shown, this utility model provides a water-stopping retaining structure for a foundation pit, including concrete piles 2 set around the perimeter of the foundation pit 1, a steel mesh 3 fixedly set between two adjacent concrete piles 2, a concrete layer 4 formed by spraying concrete onto the steel mesh 3, a water-stopping plate 5 set on the outside of the concrete layer 4, the bottom of the water-stopping plate 5 being connected to the bottom of the foundation pit 1 through a first fixing mechanism 7, and the top of the water-stopping plate 5 being connected to the concrete layer 4 through a second fixing mechanism 8.

[0025] In the embodiment, a corbel 6 is poured on the top of the concrete pile 2, the top of the water stop plate 5 abuts against the bottom of the corbel 6, the integrity and stability of the top of the concrete pile 2 are enhanced, the stress of the whole enclosure structure is more uniform, the close abutment of the water stop plate 5 and the corbel 6 further improves the water stop effect, reduces the possibility of underground water seepage from the top, and also enhances the fixing effect of the top of the water stop plate 5.

[0026] As shown in Figure 2 and Figure 3 , the first fixing mechanism 7 includes a connecting plate 11, one side of the connecting plate 11 abuts against the water stop plate 5, a bent plate 13 is arranged at the bottom of the connecting plate 11, an end of the bent plate 13 is provided with a connecting sleeve 15, a pin 17 is arranged in the connecting sleeve 15, the pin 17 penetrates through the connecting sleeve 15 and is inserted into the bottom of the foundation pit 1, a top plate 14 is arranged on the side of the connecting sleeve 15 close to the water stop plate 5, and the top plate 14 abuts against the water stop plate 5. The bent plate 13 is bent away from the water stop plate 5, so that the end of the bent plate 13 away from the water stop plate 5 is perpendicular to the water stop plate 5, the mechanical stability of the bent plate is increased, the force from the water stop plate 5 and the bottom of the foundation pit 1 can be better borne, the inclination or displacement of the bottom of the water stop plate 5 is prevented, the water stop plate 5 is ensured to always keep perpendicular to the bottom of the foundation pit 1, and thus the water stop effect is ensured to be not affected. The side of the bent plate 13 away from the water stop plate 5 is provided with a reinforcing piece 16, and the reinforcing piece 16 is attached to the bent plate 13. The attachment of the reinforcing piece 16 to the bent plate 13 further enhances the strength and rigidity of the bent plate 13, improves the overall bearing capacity of the first fixing mechanism 7, enables the first fixing mechanism 7 to better resist external force in a long-term use process, guarantees the stability of the connection between the water stop plate 5 and the bottom of the foundation pit 1, and prolongs the service life of the enclosure structure.

[0027] In the embodiment, wood frames 10 are arranged between the connecting plate 11 and the water stop plate 5 and between the top plate 14 and the water stop plate 5. Since the wood frames 10 have a certain elasticity and buffering effect, the rigid contact between the connecting plate 11, the top plate 14 and the water stop plate 5 can be reduced, the water stop plate 5 is prevented from being damaged due to external force in the construction or use process, and meanwhile the wood frames 10 also help to adjust the small gap between the connecting components, improve the sealing and stability of the connection.

[0028] As shown in Figure 4As shown, the second fixing mechanism 8 comprises a pre-embedded plate 18 embedded in the concrete layer 4, a screw rod 19 is arranged on the side of the pre-embedded plate 18 away from the concrete layer 4, the screw rod 19 penetrates the water stop plate 5 and extends to the outside of the water stop plate 5, a nut 20 is arranged on the end of the screw rod 19, the nut 20 is threadedly connected with the screw rod 19, and a gasket 9 is further arranged between the nut 20 and the screw rod 19. By screwing the nut 20 and the screw rod 19 together with the gasket, the loosening of the top of the water stop plate 5 is effectively prevented, and the stable water stopping effect of the water stop plate 5 in the water stopping enclosure structure of the whole foundation pit is ensured.

[0029] The above has described the embodiments of the present application, and the above description is exemplary, not exhaustive, and is not limited to the disclosed embodiments. Many modifications and changes are obvious to those skilled in the art without departing from the scope and spirit of the described embodiments. The selection of the terms used herein is intended to best explain the principles, practical application or technical improvement in the market of the embodiments, or to enable other ordinary skilled persons in the art to understand the disclosed embodiments.

Claims

1. A water-stopping retaining structure for an excavation pit, characterized in that, The structure includes concrete piles (2) set around the perimeter of the foundation pit (1), a steel mesh (3) fixed between two adjacent concrete piles (2), a concrete layer (4) formed by spraying concrete onto the steel mesh (3), a waterstop (5) set on the outside of the concrete layer (4), the bottom of the waterstop (5) being connected to the bottom of the foundation pit (1) through a first fixing mechanism (7), and the top of the waterstop (5) being connected to the concrete layer (4) through a second fixing mechanism (8).

2. The water-stopping retaining structure for the foundation pit according to claim 1, characterized in that, A capping beam (6) is poured on top of the concrete pile (2), and the top of the waterstop plate (5) abuts against the bottom of the capping beam (6).

3. The water-stopping retaining structure for the foundation pit according to claim 1, characterized in that, The first fixing mechanism (7) includes a connecting plate (11), one side of which abuts against the waterstop plate (5), a bending plate (13) is provided at the bottom of the connecting plate (11), a connecting sleeve (15) is provided at the end of the bending plate (13), and a pin (17) is provided inside the connecting sleeve (15), the pin (17) penetrates the connecting sleeve (15) and is inserted into the bottom of the foundation pit (1); The connecting sleeve (15) has a top plate (14) on the side near the waterstop plate (5), and the top plate (14) abuts against the waterstop plate (5).

4. The water-stopping retaining structure for the foundation pit according to claim 3, characterized in that, The bent plate (13) is bent away from the waterstop plate (5) so that the end of the bent plate (13) away from the waterstop plate (5) is perpendicular to the waterstop plate (5).

5. The water-stopping retaining structure for the foundation pit according to claim 4, characterized in that, A reinforcing member (16) is provided on the side of the bent plate (13) away from the waterstop plate (5), and the reinforcing member (16) is in contact with the bent plate (13).

6. The water-stopping retaining structure for the foundation pit according to claim 5, characterized in that, Wooden beams (10) are provided between the connecting plate (11) and the waterstop plate (5) and between the top plate (14) and the waterstop plate (5).

7. The water-stopping retaining structure for the foundation pit according to claim 1, characterized in that, The second fixing mechanism (8) includes an embedded plate (18) embedded in the concrete layer (4), a screw (19) is provided on the side of the embedded plate (18) away from the concrete layer (4), the screw (19) passes through the waterstop plate (5) and extends to the outside of the waterstop plate (5), a nut (20) is provided at the end of the screw (19), the nut (20) is threadedly connected to the screw (19), and a washer (9) is also provided between the nut (20) and the screw (19).

Images