Foundation pit water-proofing water-resisting curtain underground continuous wall

Abstract

This utility model relates to the field of civil engineering technology and discloses a waterproof curtain underground continuous wall for foundation pits. It includes a foundation, an inner guide wall fixedly connected to the outside of the foundation, a connecting plate fixedly connected to the outside of the inner guide wall, an outer guide wall fixedly connected to the outside of the connecting plate, a prefabrication mechanism on the outside of the inner guide wall, and a forming mechanism on the bottom outer side of the foundation. The prefabrication mechanism includes a top plate, which is fixedly connected to the outside of the inner guide wall. A prefabricated wall is fixedly connected to the bottom of the top plate, and installation grooves are provided on both sides of the outside of the prefabricated wall. In this utility model, the fixed connection between the top plate and the inner guide wall drives the installation of the prefabricated wall, thereby achieving a tight connection between the prefabricated walls and providing good waterproof performance. This effectively prevents groundwater from seeping into the foundation pit, strengthens and waterproofs the soil, and enhances the bonding between the wall and the soil.

Description

Technical Field

[0001] This utility model relates to the field of civil engineering technology, and in particular to a seepage-proof and waterproof curtain underground continuous wall for foundation pits. Background Technology

[0002] In modern construction engineering, with the continuous development of urban construction, the development and utilization of underground space is becoming increasingly widespread. Foundation pit engineering, as a crucial component of underground engineering, is of paramount importance. Foundation pit engineering involves multiple aspects, including earthwork excavation, support structure design and construction, and groundwater control. During construction, various factors such as the surrounding environment, geological conditions, and structural stability must be considered, making it highly complex and risky. Groundwater is one of the key factors requiring attention in foundation pit engineering. Improper handling of groundwater around the foundation pit can easily lead to a series of problems, such as water seepage on the pit sidewalls, water inrush at the base, and quicksand. These problems not only affect the construction environment within the foundation pit but also easily reduce the stability of the foundation pit support structure, thereby threatening the safety of surrounding buildings and underground pipelines.

[0003] A search revealed Chinese patent publication number CN209741861U, which discloses a lateral waterproof curtain underground continuous wall for seepage prevention in civil engineering foundation pits. The wall includes a foundation pit body, with side plates fixedly installed on the inner surface of the foundation pit body. A filling cavity is provided between the side plates and the sidewall of the foundation pit body, and a concrete wall is formed inside the filling cavity by pouring concrete. Corner protrusions are provided at the corners of the concrete wall. An intermediate connecting plate is fixedly connected to one end of each side plate. Connecting plugs and connecting holes are respectively provided at both ends of the outer surfaces of the side plates and the intermediate connecting plate. The outer surface of the connecting plug is slidably connected to the inner surface of the connecting hole. The outer surfaces of both the side plates and the intermediate connecting plate are fixedly connected to the outer surface of the concrete wall. This design greatly improves the convenience and stability of use and ensures waterproof performance.

[0004] The aforementioned patent specification mentions that "the corner of the concrete wall is provided with a corner protrusion, one end of the side plate is fixedly connected to an intermediate connecting plate, the outer surfaces of the side plate and the intermediate connecting plate are respectively provided with a connecting plug and a connecting hole, the outer surface of the connecting plug is slidably connected to the inner surface of the connecting hole, and the outer surfaces of the side plate and the intermediate connecting plate are both fixedly connected to the outer surface of the concrete wall. This can greatly improve the convenience and stability of use and ensure water-proof performance." The above content can provide stable support and fixation for the concrete wall. However, it is difficult to tightly connect the concrete walls and it does not have good waterproof performance. It cannot effectively prevent groundwater from seeping into the foundation pit, and it is difficult to reinforce and waterproof the soil. This results in poor bonding between the wall and the soil, which leads to increased safety risks of the foundation pit, affected construction quality, failure of waterproofing projects, weakened soil reinforcement effect, and aggravated environmental impact. Therefore, a seepage-proof and waterproof curtain underground continuous wall for foundation pits is proposed to solve the above problems. Utility Model Content

[0005] To overcome the above shortcomings, this utility model provides a groundwater-proof and waterproof curtain underground continuous wall for foundation pits. It aims to improve the problems in the prior art where some prefabricated walls are difficult to connect tightly and do not have good waterproof performance, which cannot effectively prevent groundwater from seeping into the foundation pit, and it is difficult to reinforce and waterproof the soil, resulting in poor bonding between the wall and the soil.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A type of underground continuous wall for foundation pit seepage prevention and waterproofing includes a foundation, an inner guide wall fixedly connected to the outside of the foundation, a connecting plate fixedly connected to the outside of the inner guide wall, an outer guide wall fixedly connected to the outside of the connecting plate, a prefabrication mechanism provided outside the inner guide wall, a forming mechanism provided on the bottom outer side of the foundation, the prefabrication mechanism including a top plate, the top plate fixedly connected to the outside of the inner guide wall, a prefabricated wall fixedly connected to the bottom of the top plate, installation grooves opened on both sides of the outside of the prefabricated wall, a connector slidably connected inside the installation groove, a sealing port opened on the inner side of the outside of the connector, an injection cavity opened inside the prefabricated wall, an extrusion hole opened on the outside of the prefabricated wall, a sealing component fixedly connected to the top of the prefabricated wall, and an injection groove opened inside the top plate.

[0008] The above technical solution involves: firstly, a top plate is fixed to the outside of the inner guide wall for support; during the construction of the precast wall, the connector is slidably embedded along the installation groove, and the sealing port is in a ready-to-work state; construction materials enter through the injection groove and then flow into the injection cavity inside the precast wall; as the pressure inside the injection cavity increases, the material is extruded through the extrusion hole, filling the surrounding foundation gaps to form a seepage-proof structure; the sealing component plays a role at the top of the precast wall; the inner guide wall, connecting plate, and outer guide wall together constitute a stable guiding and supporting structure, ensuring the accurate construction direction of the precast mechanism; and the forming mechanism on the outside of the foundation bottom assists in completing the forming of the bottom seepage-proof structure during the construction of the diaphragm wall, enabling the entire diaphragm wall to achieve the purpose of water prevention.

[0009] As a further description of the above technical solution:

[0010] The forming mechanism includes a base, the outer inner side of which is fixedly connected to the outer bottom side of the foundation, an assembly groove is provided on the top inner side of the base, an outer placement hole is provided on the top of the base, an inner placement hole is provided on the outer inner side of the assembly groove, and the top of the assembly groove is supported on the bottom of the precast wall.

[0011] Through the above technical solution: the foundation provides stable support for the entire molding mechanism, the base is fixed to the bottom of the foundation through its outer inner side to ensure the stability of the mechanism, the bottom of the precast wall is supported on the assembly groove on the top of the base, the assembly groove plays a role in positioning and initial fixing of the precast wall, and the outer and inner mounting holes are located on the top of the base and the outer inner side of the assembly groove, respectively.

[0012] As a further description of the above technical solution:

[0013] The outer guide wall has an external connection hole inside, and the inner guide wall has an internal connection hole inside;

[0014] Through the above technical solution, the outer guide wall and the inner guide wall achieve the same function through the outer connecting hole and the inner connecting hole. The outer connecting hole is opened inside the outer guide wall, and the inner connecting hole is located inside the inner guide wall. The outer steel bars and the inner steel bars can be inserted through the outer connecting hole and the inner connecting hole, so that the outer guide wall and the inner guide wall maintain a stable relative position during operation, work together to complete the support, and ensure the overall stability.

[0015] As a further description of the above technical solution:

[0016] An external reinforcing bar is fixedly connected inside the outer mounting hole, and an internal reinforcing bar is fixedly connected inside the inner mounting hole;

[0017] Through the above technical solution, the outer installation hole and the inner installation hole are connected by the outer steel bars and the inner steel bars respectively. The outer steel bars are fixed inside the outer installation hole, and the inner steel bars are fixed inside the inner installation hole, so that the external force is transmitted to the base and the foundation, and the precast wall, the base and the foundation form a coordinated force.

[0018] As a further description of the above technical solution:

[0019] The interior of the external connecting hole is fixedly connected to the exterior of the external reinforcing bar, and the interior of the internal connecting hole is fixedly connected to the exterior of the internal reinforcing bar.

[0020] Through the above technical solution: the outer guide wall transmits force to the outer steel bar through the outer connection hole, the inner guide wall transmits force to the inner steel bar through the inner connection hole, and the outer steel bar and inner steel bar transmit force to the base and foundation, forming a load transfer path.

[0021] As a further description of the above technical solution:

[0022] The sealing assembly includes a connecting pipe, the bottom of which is fixedly connected to the top of the precast wall, and the connecting pipe has a connection port at the inside.

[0023] Through the above technical solution: when the sealing component is running, the connecting pipe at the top of the precast wall is positioned with the precast wall, and the connecting port inside the connecting pipe allows fluid or medium to communicate with the sealing port inside the precast wall through the connecting port, thereby realizing the medium transmission function.

[0024] As a further description of the above technical solution:

[0025] The outside of the connector slides from the top of the precast wall into the interior of the mounting groove, so that the precast wall forms the sealing opening on both sides of the connector;

[0026] Through the above technical solution: the connector slides from the top of the precast wall into the installation groove. During the sliding process, the precast wall is squeezed by the connector, forming a sealing opening on both sides, which provides a basis for the subsequent connection of the sealing components.

[0027] As a further description of the above technical solution:

[0028] The bottom of the connecting pipe is fixedly connected to the top of the mounting groove, and the connecting port and the sealing port are horizontal and vertical.

[0029] The above technical solution involves fixing the connecting pipe to the top of the mounting groove, aligning the connecting port perpendicular to the sealing port with the sealing port, thus providing a channel for media transmission.

[0030] This utility model has the following beneficial effects:

[0031] 1. In this utility model, the precast wall is installed by fixing the top plate to the inner guide wall. Then, the connecting parts are inserted by using the installation grooves on both sides of the precast wall, so that the sealing port and the sealing component cooperate. The injection groove is used as the inlet to inject waterproof or reinforcing material into the injection cavity. Then, the material is injected into the soil around the wall through the extrusion hole, thereby achieving a tight connection between the precast walls and a good waterproof performance. This effectively prevents groundwater from seeping into the foundation pit, and also reinforces and waterproofs the soil, enhancing the bonding between the wall and the soil.

[0032] 2. In this utility model, the outer and inner reinforcing bars are fixed in the outer and inner installation holes, respectively. The outer connecting hole of the outer guide wall is matched with the outer reinforcing bar, and the inner connecting hole of the inner guide wall is matched with the inner reinforcing bar, so that a stable connection system is formed between the components of the underground continuous wall. After the reinforcing material is injected outward through the extrusion hole, the problems of loose connection, poor stability, easy water seepage at the bottom of the underground continuous wall, and insufficient structural integrity of the traditional structure are solved, and the waterproof performance and overall stability of the wall are significantly improved. Attached Figure Description

[0033] Figure 1 This is a three-dimensional schematic diagram of a seepage-proof and waterproof curtain underground continuous wall for foundation pits proposed in this utility model.

[0034] Figure 2 This is a schematic diagram of the base of a continuous underground wall for foundation pit seepage prevention and waterproof curtain proposed in this utility model.

[0035] Figure 3 This is a structural schematic diagram of a connector for a continuous underground wall with a seepage-proof and waterproof curtain for foundation pits, as proposed in this utility model.

[0036] Figure 4 This is a schematic diagram of the sealing opening of a continuous underground wall with a seepage-proof curtain for foundation pits, as proposed in this utility model.

[0037] Legend:

[0038] 1. Foundation; 2. Inner guide wall; 3. Outer guide wall; 4. Connecting plate; 5. Precast mechanism; 51. Top slab; 52. Precast wall; 53. Mounting groove; 54. Connector; 55. Sealing port; 56. Injection cavity; 57. Extrusion hole; 58. Sealing assembly; 581. Connecting pipe; 582. Connection port; 59. Injection groove; 6. Molding mechanism; 61. Base; 62. Assembly groove; 63. Outer mounting hole; 64. Inner mounting hole; 65. Outer connecting hole; 66. Inner connecting hole; 67. Outer reinforcing bar; 68. Inner reinforcing bar. Detailed Implementation

[0039] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0040] Reference Figure 1 , Figure 3 and Figure 4 An embodiment of this utility model is provided: a seepage-proof and waterproof curtain underground continuous wall for foundation pits, including a foundation 1, which is the construction site. An inner guide wall 2 is fixedly connected to the outside of the foundation 1. The inner guide wall 2 plays a positioning and guiding role. A connecting plate 4 is fixedly connected to the outside of the inner guide wall 2. The connecting plate 4 connects the inner guide wall 2 and the outer guide wall 3, forming an integral frame structure. An outer guide wall 3 is fixedly connected to the outside of the connecting plate 4. The outer guide wall 3 cooperates with the inner guide wall 2 to further strengthen the guidance and constraint of trenching construction. A prefabrication mechanism 5 is set on the outside of the inner guide wall 2, and a forming mechanism 6 is set on the bottom outer side of the foundation 1.

[0041] Specifically, the underground continuous wall of the foundation pit seepage prevention and water-proof curtain includes the foundation 1 as the construction site, and the outer side of the foundation 1 is provided with an inner guide wall 2 for positioning and guidance. The inner guide wall 2 and the outer guide wall 3 are fixedly connected by a connecting plate 4 to form a frame structure. The outer guide wall 3 assists the inner guide wall 2 in strengthening the guiding constraint of trench construction. The prefabrication mechanism 5 is arranged on the outer side of the inner guide wall 2, and the forming mechanism 6 is set on the outer side of the bottom of the foundation 1.

[0042] The prefabrication mechanism 5 includes a top plate 51, which serves as a connecting component between the prefabrication mechanism 5 and the inner guide wall 2. The top plate 51 is externally fixedly connected to the outside of the inner guide wall 2, and a prefabricated wall 52 is fixedly connected to the bottom of the top plate 51. The prefabricated wall 52 prevents groundwater from seeping into the foundation pit and also bears the pressure of the surrounding soil. Installation grooves 53 are provided on both sides of the outside of the prefabricated wall 52. The installation grooves 53 provide space for the installation and sliding of the connectors 54, enabling the prefabricated walls 52 to be quickly and accurately connected through the connectors 54, ensuring the connection accuracy between the prefabricated walls 52. For sealing, a connector 54 is slidably connected inside the mounting groove 53. The connector 54 connects to the adjacent precast wall 52, so that the precast wall 52 forms a continuous wall structure. At the same time, it cooperates with the sealing component 58 through the sealing port 55 to improve the waterproof performance of the wall. The outer inner side of the connector 54 has a sealing port 55, which cooperates with the connection port 582 of the sealing component 58. Concrete is injected into the sealing port 55 to form an integral sealing structure between the connector 54 and the precast wall 52, preventing groundwater from seeping into the foundation pit from the gaps between the precast walls 52.

[0043] Specifically, the prefabricated structure 5 is fixedly connected to the outer side of the inner guide wall 2 by the top plate 51, and the bottom of the structure extends into a prefabricated wall 52. The prefabricated wall 52 has installation grooves 53 on both sides, and connectors 54 are slidably embedded in the grooves for splicing adjacent prefabricated walls 52. The connectors 54 have sealing ports 55 on their inner sides, which can be connected to the connection ports 582 of the sealing components 58. By pouring concrete into the sealing ports 55, the connectors 54 and the prefabricated wall 52 form a sealed whole.

[0044] The precast wall 52 has an injection cavity 56 inside, which is used to store the injected waterproof or reinforcing material. During construction, the material is injected into the soil around the wall through the extrusion hole 57, which serves to waterproof and reinforce the soil. The precast wall 52 has an extrusion hole 57 on the outside, which serves as the outlet for the waterproof or reinforcing material in the injection cavity 56, so that the material can be injected evenly into the soil around the wall, thereby achieving soil reinforcement and waterproofing. A sealing component 58 is fixedly connected to the top of the precast wall 52. An injection groove 59 is opened inside the top plate 51, which serves as the inlet for injecting the waterproof or reinforcing material into the injection cavity 56, facilitating construction operations and allowing the material to be smoothly injected into the injection cavity 56.

[0045] Specifically, the precast wall 52 has an injection cavity 56 inside and an extrusion hole 57 on the outside, forming a material conveying channel. The top of the precast wall 52 is fixed with a sealing component 58, and the top plate 51 that cooperates with it has an injection groove 59 inside, which serves as an inlet for conveying waterproof or reinforcing materials to the injection cavity 56, so that the material can flow into the injection cavity 56 through the injection groove 59 and then be discharged into the soil around the wall through the extrusion hole 57.

[0046] The sealing assembly 58 includes a connecting pipe 581, which connects the precast wall 52 and the sealing port 55, providing a channel for the injection of sealing material and enhancing the sealing performance of the top of the precast wall 52 to prevent groundwater from seeping in from the top of the precast wall 52. The bottom of the connecting pipe 581 is fixedly connected to the top of the precast wall 52. The connecting pipe 581 has a connecting port 582 inside, which cooperates with the sealing port 55 to form a sealing channel, allowing the sealing material to be accurately filled into the gaps between the precast walls 52, achieving waterproof sealing of the wall. The outside of the connector 54 slides from the top of the precast wall 52 into the interior of the mounting groove 53, so that the precast wall 52 forms sealing ports 55 on both sides of the connector 54. The bottom of the connecting pipe 581 is fixedly connected to the top of the mounting groove 53, and the connecting port 582 and the sealing port 55 are horizontal and vertical.

[0047] Specifically, the bottom of the connecting pipe 581 of the sealing component 58 is fixed to the top of the precast wall 52 and the top of the mounting groove 53. It has a connecting port 582 inside. The connector 54 slides from the top of the precast wall 52 into the mounting groove 53, forming a sealing port 55 on both sides of the precast wall 52. The connecting port 582 and the sealing port 55 are horizontally and vertically corresponding to each other, forming a sealing material delivery channel for filling the gaps between the precast walls 52.

[0048] Reference Figure 1 and Figure 2 The forming mechanism 6 includes a base 61, which provides bottom support for the precast wall 52 and is connected to the foundation 1 to distribute the load transmitted by the precast wall 52 to the foundation 1. The outer inner side of the base 61 is fixedly connected to the outer bottom side of the foundation 1. An assembly groove 62 is provided on the top inner side of the base 61. The assembly groove 62 is used to install and position the bottom of the precast wall 52 to ensure the stability and accuracy of the precast wall 52 in the vertical direction, and at the same time provide space for the connection between the precast wall 52 and the base 61.

[0049] Specifically, the bottom outer side of the base 61 of the molding mechanism 6 is fixedly connected to the foundation 1 to provide bottom support for the precast wall 52. An assembly groove 62 is provided on the inner side of the top of the base 61, into which the bottom of the precast wall 52 can be embedded. Vertical positioning and installation are achieved through the assembly groove 62, forming a connection structure between the two.

[0050] The top of the base 61 has an external mounting hole 63 for fixing the external reinforcing bar 67, so that the external reinforcing bar 67 can be accurately installed in the base 61. The inner side of the assembly groove 62 has an internal mounting hole 64 for fixing the internal reinforcing bar 68, so that the internal reinforcing bar 68 can be accurately installed in the base 61. The top of the assembly groove 62 is supported on the bottom of the precast wall 52. The outer guide wall 3 has an external connecting hole 65 inside, which cooperates with the external reinforcing bar 67 in the external mounting hole 63 to realize the reinforcing bar connection between the outer guide wall 3 and the base 61. The inner guide wall 2 has an internal connecting hole 66 inside, which cooperates with the internal reinforcing bar 68 in the internal mounting hole 64 to realize the reinforcing bar connection between the inner guide wall 2 and the base 61.

[0051] Specifically, the base 61 has an external mounting hole 63 at the top for fixing the external reinforcing bar 67, and an internal mounting hole 64 is opened on the inner wall of the outer side of the assembly groove 62 for fixing the internal reinforcing bar 68. The top of the assembly groove 62 supports the bottom of the precast wall 52. The external connecting hole 65 inside the outer guide wall 3 corresponds to the external reinforcing bar 67 in the external mounting hole 63, and the internal connecting hole 66 inside the inner guide wall 2 corresponds to the internal reinforcing bar 68 in the internal mounting hole 64, so as to realize the reinforcing bar connection between the outer guide wall 3, the inner guide wall 2 and the base 61 respectively.

[0052] An outer reinforcing bar 67 is fixedly connected inside the outer mounting hole 63. The outer reinforcing bar 67 serves as a connecting reinforcing bar between the outer guide wall 3 and the base 61, transmitting the force between the two and enhancing the connection strength and integrity between the outer guide wall 3 and the base 61. An inner reinforcing bar 68 is fixedly connected inside the inner mounting hole 64. The inner reinforcing bar 68 serves as a connecting reinforcing bar between the inner guide wall 2 and the base 61, transmitting the force between the two and enhancing the connection strength and integrity between the inner guide wall 2 and the base 61. The inner connection hole 65 is fixedly connected to the outside of the outer reinforcing bar 67, and the inner connection hole 66 is fixedly connected to the outside of the inner reinforcing bar 68.

[0053] Specifically, the outer reinforcing bar 67 is fixed inside the outer mounting hole 63, the outer connecting hole 65 of the outer guide wall 3 is fixed to the outside of the outer reinforcing bar 67, the inner reinforcing bar 68 is fixed inside the inner mounting hole 64, and the inner connecting hole 66 of the inner guide wall 2 is fixed to the outside of the inner reinforcing bar 68, forming a structure in which the outer guide wall 3 and the inner guide wall 2 are respectively connected to the base 61 by reinforcing bars.

[0054] Working principle: During construction, the inner guide wall 2 is first fixedly connected to the outside of the foundation 1, and connected to the outer guide wall 3 through the connecting plate 4 to form an integral frame. The base 61 is fixed to the outside of the bottom of the foundation 1, and the top plate 51 is fixed to the outside of the inner guide wall 2. Its bottom is connected to the precast wall 52. The mounting grooves 53 on both sides of the precast wall 52 are used to insert the connector 54. The sealing port 55 on the connector 54 cooperates with the sealing component 58. During construction, waterproof or reinforcing material is injected from the injection groove 59 into the injection cavity 56, and then injected into the soil around the wall through the extrusion hole 57. The bottom of the connecting pipe 581 of the sealing component 58 is connected to the top of the precast wall 52 and the top of the mounting groove 53. The connecting port 582 is aligned with the sealing port 55. Reinforcing material is injected into the sealing port 55 to achieve sealing.

[0055] The assembly groove 62 at the top of the base 61 supports the bottom of the precast wall 52. The outer mounting hole 63 and the inner mounting hole 64 are used to fix the outer steel bar 67 and the inner steel bar 68, respectively. The outer connecting hole 65 of the outer guide wall 3 cooperates with the outer steel bar 67, and the inner connecting hole 66 of the inner guide wall 2 cooperates with the inner steel bar 68. When the reinforcing material is injected outward through the extrusion hole 57, the inner guide wall 2 and the base 61 form an integral whole.

[0056] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A type of seepage-proof and waterproof curtain diaphragm wall for foundation pits, comprising a foundation (1), characterized in that: The foundation (1) is fixedly connected to an inner guide wall (2), the inner guide wall (2) is fixedly connected to a connecting plate (4), the connecting plate (4) is fixedly connected to an outer guide wall (3), the inner guide wall (2) is provided with a prefabrication mechanism (5), and the foundation (1) is provided with a forming mechanism (6) on the outer side of the bottom. The prefabrication mechanism (5) includes a top plate (51), the outside of which is fixedly connected to the outside of the inner guide wall (2). A prefabricated wall (52) is fixedly connected to the bottom of the top plate (51). Mounting grooves (53) are provided on both sides of the outside of the prefabricated wall (52). A connector (54) is slidably connected inside the mounting groove (53). A sealing port (55) is provided on the inner side of the outside of the connector (54). An injection cavity (56) is provided inside the prefabricated wall (52). An extrusion hole (57) is provided on the outside of the prefabricated wall (52). A sealing component (58) is fixedly connected to the top of the prefabricated wall (52). An injection groove (59) is provided inside the top plate (51).

2. The underground continuous wall with seepage prevention and waterproof curtain for foundation pits according to claim 1, characterized in that: The forming mechanism (6) includes a base (61), the outer inner side of the base (61) is fixedly connected to the outer bottom side of the foundation (1), the top inner side of the base (61) is provided with an assembly groove (62), the top of the base (61) is provided with an outer placement hole (63), the outer inner side of the assembly groove (62) is provided with an inner placement hole (64), and the top of the assembly groove (62) is supported at the bottom of the precast wall (52).

3. A seepage-proof and waterproof curtain diaphragm wall for foundation pits according to claim 2, characterized in that: The outer guide wall (3) has an external connection hole (65) inside, and the inner guide wall (2) has an internal connection hole (66) inside.

4. A seepage-proof and waterproof curtain diaphragm wall for foundation pits according to claim 3, characterized in that: The outer mounting hole (63) is fixedly connected to an outer steel bar (67), and the inner mounting hole (64) is fixedly connected to an inner steel bar (68).

5. A seepage-proof and waterproof curtain diaphragm wall for foundation pits according to claim 4, characterized in that: The interior of the outer connecting hole (65) is fixedly connected to the exterior of the outer reinforcing bar (67), and the interior of the inner connecting hole (66) is fixedly connected to the exterior of the inner reinforcing bar (68).

6. A diaphragm wall with seepage prevention and waterproofing for foundation pits according to claim 1, characterized in that: The sealing assembly (58) includes a connecting pipe (581), the bottom of which is fixedly connected to the top of the precast wall (52), and the connecting pipe (581) has a connection port (582) inside.

7. A seepage-proof and waterproof curtain diaphragm wall for foundation pits according to claim 6, characterized in that: The outside of the connector (54) slides from the top of the precast wall (52) into the interior of the mounting groove (53), so that the precast wall (52) forms the sealing opening (55) on both sides of the connector (54).

8. A seepage-proof and waterproof curtain diaphragm wall for foundation pits according to claim 7, characterized in that: The bottom of the connecting pipe (581) is fixedly connected to the top of the mounting groove (53), and the connecting port (582) is horizontally perpendicular to the sealing port (55).

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