River-facing foundation pit communicating opening waterproof structure and construction method thereof

Abstract

The invention discloses a river-facing foundation pit communicating opening waterproof structure and a construction method thereof, and relates to the technical field of foundation pit waterproofness, the waterproof structure comprises a structural self-waterproof system, an embedded steel plate, a water stop steel plate, an expansion water stop strip and an outer layer protection structure, and the structural self-waterproof system comprises a main body basement outer wall, a subway side wall body and a communicating opening side wall; the main body basement outer wall is connected with the subway side wall body through the communicating port side wall, and a communicating port is formed between the main body basement outer wall and the subway side wall body; the pre-embedded steel plate is pre-embedded in the main body basement outer wall; the water stop steel plate is connected to the embedded steel plate and located in a communicating opening plate behind the surface of the communicating opening. The expansion water-stop strip is arranged in a shear-resistant groove of the main body basement outer wall; the outer layer protection structure comprises a rubber water stop belt arranged in a deformation joint node of the communication opening and a flexible full-wrapping waterproof layer laid on the communication opening. According to the construction method, the waterproof performance of the underground connecting channel is effectively improved.

Description

Technical Field

[0001] The invention relates to the technical field of deep foundation pit waterproof structures, and in particular to a riverside foundation pit connecting opening waterproof structure and a construction method thereof. Background Art

[0002] During the implementation of the Linjiang deep foundation pit project, planning and constructing the connecting ports required for future underground rail transit is a crucial link. These connecting ports are often located under complex geological conditions with high groundwater levels and strong water pressure, and their waterproof design and construction have become a major technical challenge in the project.

[0003] Traditional waterproof materials and technical means often face the following technical problems when dealing with the waterproof design of such connecting ports: Firstly, at the junction of the connecting port and the main underground structure, since the connecting passage usually needs to be constructed after the implementation of the waterproof structure, waterproofing the interface is particularly difficult; in addition, if the waterproofing measures are improper or fail, it will lead to water infiltration, which will not only affect the normal function of the connecting port, but may also pose a risk to the structural stability of the entire deep foundation pit and underground rail transit. Summary of the invention

[0004] In view of this, the purpose of the present invention is to provide a waterproof structure for the connecting port of a riverside foundation pit and a construction method thereof in order to address the problems and shortcomings of the prior art, so as to solve the problem that the existing waterproof measures affect the normal function of the connecting port and may also pose a risk to the structural stability of the entire deep foundation pit and underground transportation. To solve the above problems, the present invention adopts the following technical solutions: The first object of the present invention is to provide a waterproof structure for a riverside foundation pit communication port, the waterproof structure for a riverside foundation pit communication port comprising: The structural self-waterproofing system includes a main basement outer wall, a subway side wall and a connecting port side wall formed by pouring reinforced concrete structure, wherein the main basement outer wall is connected to the subway side wall through the connecting port side wall, and a connecting port located in the connecting port side wall is formed between the main basement outer wall and the subway side wall; Pre-buried steel plates are pre-buried in the outer wall of the main basement; A water-stop steel plate connected to the embedded steel plate, and the water-stop steel plate is located inside the rear connecting port plate on the surface of the connecting port; An expansion water stop strip is arranged in the shear groove of the outer wall of the main basement; The outer protective structure comprises a rubber water stop strip arranged in the deformation joint node of the connecting port and a flexible full-cover waterproof layer laid at the connecting port.

[0005] Furthermore, a first deformation joint is provided between the side wall of the communication port and the side wall of the subway.

[0006] Furthermore, the rubber water stop is arranged in the first deformation joint between the subway side wall and the side wall of the connecting port.

[0007] Furthermore, the width of the embedded steel plate is not less than 100 mm, and the cross-sectional size of the shear groove is 100×100 mm.

[0008] Furthermore, plate reinforcement is arranged in the rear connecting port plate, and the plate reinforcement is connected to the L-shaped reserved reinforcement of the outer wall of the main basement.

[0009] Furthermore, the post-made connecting port plate includes a connecting port top plate located on the top wall of the connecting port, top steel bars are arranged around the connecting port top plate and the outer wall of the main basement, and the rubber water stop is arranged between the gaps of the top steel bars.

[0010] Furthermore, the post-made connecting port plate also includes a connecting port bottom plate located on the bottom wall of the connecting port, bottom steel bars are arranged around the connecting port bottom plate and the outer wall of the main basement, and the rubber water stop is arranged between the gaps of the bottom steel bars.

[0011] Furthermore, a concrete cushion layer is provided on the lower surface of the bottom plate of the connecting port, and the thickness of the concrete cushion layer is 99-101 mm.

[0012] Furthermore, the width of the first deformation joint is set to 99-101 mm.

[0013] The second object of the present invention is to provide a construction method of a waterproof structure for a connecting opening of a riverside foundation pit, which is applied to the waterproof structure for a connecting opening of a riverside foundation pit as described above, and the construction method comprises the following steps: Step S 1 : When constructing the main basement exterior wall, set up embedded steel plates and L-shaped reserved steel bars around the connection between the connecting port and the main basement exterior wall; Step S 2 : When making the rear connection of the connecting port, chisel out the surrounding wall within the connection port and the 1m range of the external expansion, and chisel the shear groove on the surface of one side of the connecting port plate close to the main basement outer wall; Step S 3 : Install expansion water stop strips in shear grooves; Step S 4 : Connect the plate reinforcement with the L-shaped reserved reinforcement, and weld the waterstop steel plate in the connecting plate to the embedded steel plate.

[0014] Compared with the prior art, the present invention has significant advantages and beneficial effects, which are specifically embodied in the following aspects: 1. The waterproof structure of the connecting opening of the riverside foundation pit in the present invention is composed of the connection between the outer wall of the main basement, the side wall of the subway and the side wall of the connecting opening, which constructs a relatively regular and stable connecting space as a whole. Its integrated structural form helps to disperse water pressure, avoid the risk of leakage caused by local concentrated force, and rely on the tightness of its own structure to first achieve a preliminary waterproof barrier effect; in the construction stage, the embedded steel plate is placed in the designated position of the outer wall of the main basement in advance, and when the water-stop steel plate is connected thereto later, the two can form a stable connection foundation. This pre-embedded method ensures the reliability of the installation of the water-stop steel plate, so that the water-stop structure can be accurately set at the key position that needs waterproofing, avoiding the leakage risk caused by unstable installation in the later stage, and enhancing the overall stability of the waterproof structure in the connection port area; the water-stop steel plate uses its own material characteristics and shape design to form a barrier. When the water flow tries to penetrate through the gaps and other parts of the connection port plate, the water-stop steel plate can effectively prevent the water from continuing to penetrate inward, and guide the water flow to be discharged or stagnant along the predetermined path, thereby greatly enhancing the waterproof effect of the connection port surface and preventing water from entering the foundation pit and causing damage; the expansion water stop strip is located in the specific position of the shear groove. When it encounters water, it will expand and fill the gap between the shear groove and the surrounding structure to form a tight seal. This feature enables it to actively respond to the generation of tiny cracks or gaps that may be caused by factors such as structural deformation and vibration, and timely block potential water seepage channels. It can not only prevent water from penetrating under normal circumstances, but also maintain good waterproof performance when a certain degree of displacement or deformation occurs, further improving the reliability and durability of the waterproofing of the entire structure; the rubber waterstop can adapt to the deformation of the expansion and contraction, dislocation, etc. of the deformation joint due to its flexibility and elasticity. During the deformation process, the rubber waterstop can effectively prevent water from entering the foundation pit from the deformation joint, ensuring that even when the structure undergoes certain changes, it can still maintain a good waterproof effect and protect the foundation pit from moisture intrusion. The flexible full-cover waterproof layer wraps the entire connection port, which can effectively isolate external moisture from direct contact with the connection port structure. Whether it is river water, groundwater or other sources of moisture, it is blocked in the outer layer to prevent moisture from penetrating into the foundation pit. At the same time, it can adapt to the slight deformation of the structure around the connection port, play an all-round protective role, and further improve the comprehensive performance of the entire waterproof structure. Therefore, the structural self-waterproofing system serves as the basis of the overall waterproofing capability, reducing the possibility of water penetration; then the embedded steel plates and waterstop steel plates target the weak points of the connecting ports to enhance the local waterproofing capability; the expansion waterstop strips further supplement the weak links in the structure, preventing leakage through dynamic sealing; finally, the outer protective structure serves as the last line of defense, ensuring the waterproofing performance of the entire connecting port. These four parts cooperate with each other to form a multi-level, all-round waterproofing system. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1It is a schematic diagram of the plane positioning structure of the waterproof structure of the connecting port of the riverside foundation pit in an embodiment of the present invention; Figure 2 for Figure 1 The schematic diagram of the local enlarged structure at position Ⅰ in the middle; Figure 3 for Figure 1 Schematic diagram of the cross-section structure at AA in the middle; Figure 4 It is a schematic diagram of the planar layout of the structure connected to the connecting port in an embodiment of the present invention; Figure 5 for Figure 4 Schematic diagram of the local enlarged structure at II in the middle; Figure 6 Schematic diagram of the deformation joint node of the top plate of the connecting port in the embodiment of the present invention; Figure 7 for Figure 6 The schematic diagram of the local enlarged structure at point III in the middle; Figure 8 Schematic diagram of the node of the bottom plate of the connecting port in the embodiment of the present invention; Fig. 9 for Figure 8 The schematic diagram of the local enlarged structure at position IV in the middle; Fig.10 It is a schematic diagram of the construction method of the waterproof structure of the connecting port of the riverside foundation pit in an embodiment of the present invention.

[0016] Description of reference numerals: 1-Structural self-waterproof system; 11-Exterior wall of the main basement; 111-Shear groove; 112-Removal area of ​​the retaining wall; 12-Metro side wall; 13-Connecting port side wall; 14-Connecting port; 141-Connecting port plate at the back; 1411-Connecting port top plate; 1412-Connecting port bottom plate; 15-Slab reinforcement; 16-Top reinforcement; 17-Bottom reinforcement; 18-Concrete cushion; 2-Embedded steel plate; 3- Waterstop steel plate; 4-Expansion water stop; 5-Outer protective structure; 51-Rubber waterstop. DETAILED DESCRIPTION

[0017] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0018] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0019] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined. The meaning of "several" is one or more, unless otherwise clearly and specifically defined.

[0020] In the description of the present invention, it is necessary to understand that the directions or positional relationships indicated by the terms "up", "down", "front", "back", "left", "right", etc. are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0021] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0022] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, specific embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0023] Please refer to Figure 1-9 As shown, an embodiment of the present invention provides a riverside foundation pit connection port waterproof structure, the riverside foundation pit connection port waterproof structure comprises a structural self-waterproof system 1, an embedded steel plate 2, a water stop steel plate 3, an expansion water stop strip 4 and an outer protective structure 5, wherein: The structural self-waterproofing system 1 serves as the basis of the entire waterproof structure. The structural self-waterproofing system 1 in this embodiment includes a main basement outer wall 11, a subway side wall 12 and a connecting port side wall 13 formed by casting a reinforced concrete structure. The main basement outer wall 11 is connected to the subway side wall 12 through the connecting port side wall 13, and a connecting port 14 located in the connecting port side wall 13 is formed between the main basement outer wall 11 and the subway side wall 12. Since the reinforced concrete main structure itself has a certain waterproof ability, especially when the density and proportion of the concrete are appropriate, the main basement outer wall 11, the subway side wall 12 and the connecting port side wall 13 form an integral structure for achieving a preliminary waterproof effect.

[0024] In order to enhance the strength of the main basement outer wall 11 and also provide a stable connection point for the subsequent installation of the water-stop steel plate, the embedded steel plate 2 in this embodiment is pre-buried in the main basement outer wall 11, greatly reducing the possibility of direct water penetration.

[0025] The water-stop steel plate 3 is connected to the embedded steel plate 2, and the water-stop steel plate 3 is located in the back-made connecting port plate 141 on the surface of the connecting port 14. In this way, with the help of the stability of the embedded steel plate 2, the water-stop steel plate 3 can play a key role in water-stopping in the back-made connecting port plate 141 on the surface of the connecting port 14. For example, when water flow attempts to penetrate through the gaps of the connecting port plate and other parts, the water-stop steel plate 3 can effectively prevent the water from continuing to penetrate inward, and guide the water flow to be discharged or stagnant along a predetermined path, thereby greatly enhancing the waterproof effect of the surface of the connecting port 14 and preventing water from entering the interior of the foundation pit and causing damage.

[0026] In order to enhance the shear resistance of the main basement outer wall 11, a shear groove 111 is set in the main basement outer wall 11 to prevent the wall from slipping when subjected to force. However, the existence of the shear groove 111 may become a channel for water seepage, so in order to fill the potential water seepage path, an expansion water stop strip 4 is set in the shear groove 111 of the main basement outer wall 11.

[0027] The outer protective structure 5 includes a rubber waterstop 51 arranged in the deformation joint node of the connecting port 14 and a flexible full-cover waterproof layer laid at the connecting port 14. The deformation joint is a natural weak point in the structure. It is a part that allows the structure to deform. If it is not handled properly, water can easily penetrate from here. In this embodiment, the rubber waterstop 51 is arranged in the deformation joint node. Its purpose is to deal with the risk of water seepage at the deformation joint. The rubber waterstop 51 can maintain waterproof performance when the structure is deformed through its own elasticity and flexibility. The flexible full-cover waterproof layer is a comprehensive protection for the entire connecting port. It can cover all possible water seepage paths to form a complete waterproof barrier.

[0028] Specifically, the connection between the main basement exterior wall 11, the subway side wall 12 and the connecting port side wall 13 forms a connecting port 14, which constructs a relatively regular and stable connecting space as a whole. Its integrated structural form helps to disperse water pressure, avoid the risk of leakage due to local concentrated force, and rely on the tightness of its own structure to achieve a preliminary waterproof barrier effect.

[0029] During the construction phase, the embedded steel plate 2 is placed in advance at the designated position of the main basement outer wall 11. When the water-stop steel plate 3 is connected thereto later, the two can form a stable connection foundation. This pre-embedded method ensures the reliability of the installation of the water-stop steel plate 3, so that the water-stop structure can be accurately set at the key position that needs waterproofing, avoiding the leakage risk caused by unstable installation in the later stage, and enhancing the overall stability of the waterproof structure in the connection port area.

[0030] The waterstop steel plate 3 utilizes its own material properties and shape design to form a barrier. When water attempts to penetrate through the gaps in the connecting port plate and other parts, the waterstop steel plate 3 can effectively prevent the water from continuing to penetrate inward and guide the water to be discharged or stagnant along a predetermined path, thereby greatly enhancing the waterproof effect of the surface of the connecting port 14 and preventing water from entering the interior of the foundation pit and causing damage.

[0031] The expansion water stop strip 4 is located at a specific position of the shear groove 111. When it encounters water, it will expand and fill the gap between the shear groove 111 and the surrounding structure to form a tight seal. This feature enables it to actively respond to the generation of tiny cracks or gaps that may be caused by factors such as structural deformation and vibration, and timely block potential water seepage channels. It can not only prevent water from penetrating under normal circumstances, but also maintain good waterproof performance when a certain degree of displacement or deformation occurs, further improving the reliability and durability of the waterproofing of the entire structure.

[0032] The rubber waterstop 51 can adapt to the deformation of the expansion and contraction, dislocation, etc. of the deformation joint due to its flexibility and elasticity. During the deformation process, the rubber waterstop 51 can effectively prevent moisture from entering the foundation pit from the deformation joint, ensuring that even when the structure undergoes certain changes, it can still maintain a good waterproof effect and protect the foundation pit from moisture intrusion. The flexible full-cover waterproof layer wraps the entire connecting port 14, which can effectively isolate external moisture from direct contact with the connecting port structure. Whether it is river water, groundwater or other sources of moisture, it is blocked in the outer layer to prevent moisture from penetrating into the foundation pit. At the same time, it can adapt to the slight deformation of the structure around the connecting port, play an all-round protective role, and further improve the comprehensive performance of the entire waterproof structure.

[0033] Therefore, the structural self-waterproofing system 1 serves as the basis of the overall waterproofing capability, reducing the possibility of water penetration; then the embedded steel plates 2 and waterstop steel plates 3 target the weak points of the connecting openings 14 to enhance the local waterproofing capability; the expansion waterstop strips 4 further supplement the weak links in the structure to prevent leakage through dynamic sealing; finally, the outer protective structure serves as the last line of defense to ensure the waterproofing performance of the entire connecting opening 14. These four parts cooperate with each other to form a multi-level, all-round waterproofing system.

[0034] Specifically, see Figure 1 As shown, in one embodiment of the present invention, there is a first deformation joint between the connecting port side wall 13 and the subway side wall 12. On the one hand, it allows the structure to deform freely within a certain range, such as settling, expansion or rotation; on the other hand, it prevents the expansion of cracks and avoids the destruction of the integrity of the structure.

[0035] It needs to be explained here that in order to deal with settlement differences or deformation problems during construction, in actual projects, the structural characteristics of the connecting port side walls and the subway side walls may be different. For example, the connecting port side walls may be cast later, while the subway side walls are already existing structures. In this case, it is normal to have settlement differences or deformations between the two.

[0036] Specifically, see Figure 2 As shown, in one embodiment of the present invention, the rubber water stop strip 51 is arranged in the first deformation joint between the subway side wall 12 and the connecting port side wall 13.

[0037] Since the connecting port 14 is located near the river, there may be pressure from river water or groundwater outside. If there is no waterproofing measure for the deformation joint, water can easily penetrate through the gap, affecting the safety of the foundation pit. Therefore, the first deformation joint also adopts a similar waterproof design, such as embedding a rubber water stop 51 in the joint, which can allow deformation and block moisture.

[0038] Specifically, see Figure 5 As shown, in one embodiment of the present invention, the width of the embedded steel plate 2 is not less than 100 mm, and the cross-sectional size of the shear groove 111 is 100×100 mm. The main function of the embedded steel plate 2 is to provide a stable connection foundation for the subsequent water-stop steel plate 3. If the steel plate is too narrow, the connection strength may be insufficient. Especially in a complex underground environment, the water-stop steel plate 3 may loosen or even fall off due to water pressure or other external forces. Therefore, the design of a width of not less than 100 mm is to ensure the reliability of the connection. This width can also provide a larger contact area, disperse stress, and avoid excessive local force.

[0039] The expansion water stop strip 4 is used to prevent water penetration, and the cross-sectional size of the shear groove 111 can provide enough space to allow the expansion water stop strip 4 to be installed more firmly, and at the same time, it can fully expand when encountering water and fill the gap in the groove. If the shear groove 111 is too small, the expansion water stop strip 4 may not function properly, and if it is too large, it may cause material waste or unstable installation.

[0040] Specifically, see Figure 5 As shown, in one embodiment of the present invention, a plate reinforcement 15 is provided in the rear connecting port plate 141, and the plate reinforcement 15 is connected to the L-shaped reserved reinforcement.

[0041] The connection between the plate reinforcement 15 and the L-shaped reserved reinforcement closely combines the later-made connecting port plate with the original main basement outer wall 11, subway side wall 12 and other structures. This connection method allows each structural part to restrain each other and cooperate with each other to form a more integrated structural system. When facing external loads (such as soil pressure, water pressure, etc.), it can effectively disperse and transmit the force to the entire structure, avoiding local excessive force causing structural damage, thereby improving the stability and bearing capacity of the entire connecting port area structure.

[0042] In addition, in concrete structures, steel bars can effectively restrain cracking of concrete, especially when the structure is subjected to tension or shear. This connection method can reduce cracks caused by factors such as temperature changes and uneven settlement, prevent moisture from penetrating into the foundation pit through cracks, and ensure the integrity of the waterproof structure.

[0043] Specifically, see Figure 6 , 7 As shown, in one embodiment of the present invention, the connecting port plate 141 includes a connecting port top plate 1411 located on the top wall of the connecting port 14, and top steel bars 16 are arranged around the connecting port top plate 1411 and the main basement outer wall 11, and a rubber water stop 51 is arranged between the gaps of the top steel bars 16, which can better disperse and transmit forces when facing external loads (such as soil pressure, water pressure, etc.), avoid local excessive force causing structural damage, and improve the stability of the structure. The provision of the top steel bars 16 provides additional support for the connecting port top plate 1411, which can effectively resist the stress caused by structural deformation (such as settlement, temperature change, etc.). In a complex underground environment, this anti-deformation ability helps to maintain the geometric shape of the connecting port area and prevent cracks caused by structural deformation, thereby ensuring the integrity of the waterproof structure.

[0044] In addition, the rubber water stop 51 can be better integrated with the structure during the concrete pouring process, reducing gaps and leakage channels caused by loose concrete pouring.

[0045] Specifically, see Figure 8 , 9 As shown, in one embodiment of the present invention, the connecting port plate 141 also includes a connecting port bottom plate 1412 located on the bottom wall of the connecting port 14, and bottom steel bars 17 are arranged around the connecting port bottom plate 1412 and the main basement outer wall 11, and rubber water stop strips 51 are arranged between the gaps of the bottom steel bars 17.

[0046] Thus, the bottom plate 1412 of the communication port is connected to the outer wall 11 of the main basement through the bottom reinforcement 17 around it, forming a stable frame structure. This connection method can effectively combine the bottom plate 1412 of the communication port with the outer wall 11 of the main basement, thereby enhancing the integrity of the entire structure. When facing external loads (such as soil pressure, water pressure, etc.), it can better disperse and transmit force, avoid local excessive force leading to structural damage, and improve the stability of the structure.

[0047] In addition, the bottom reinforcement 17 provides additional support for the bottom plate 1412 of the communication port, which can effectively resist the stress caused by structural deformation (such as settlement, temperature change, etc.). In a complex underground environment, this anti-deformation ability helps to maintain the geometric shape of the communication port area and prevent cracks caused by structural deformation, thereby ensuring the integrity of the waterproof structure.

[0048] Specifically, see Figure 8 , 9 As shown, in one embodiment of the present invention, a concrete cushion layer 18 is further provided on the lower surface of the communication port bottom plate 1412, and the thickness of the concrete cushion layer 18 is 99-101 mm.

[0049] During the construction process, the underground soil layer may be uneven or soft. The concrete cushion layer can effectively fill these uneven parts so that the connecting port bottom plate 1412 can be evenly stressed, avoiding stress concentration and cracking of the bottom plate caused by uneven foundation, thereby improving the stability of the entire structure.

[0050] The concrete cushion layer 18 can increase the structural weight of the communication port bottom plate 1412, thereby enhancing the connection stability between the bottom plate and the main basement outer wall 11. When facing external water pressure, soil pressure and other loads, the heavier bottom plate can better resist the effects of these forces, reduce the risk of the bottom plate floating or displacement, and ensure the stability of the entire communication port area structure.

[0051] Specifically, see Figure 1 As shown, in one embodiment of the present invention, the width of the first deformation joint is set to 99-101 mm.

[0052] In underground projects, different structural parts (such as the side wall of the connecting port and the side wall of the subway) may produce different degrees of settlement due to geological conditions, construction loads and other factors. Setting the width of the first deformation joint to 99-101mm can provide sufficient space buffer for such settlement differences. When the structure on one side settles, the structure on the other side will not be subjected to excessive tension or pressure, thereby avoiding structural cracking due to settlement differences and ensuring the stability of the structure. As a preferred embodiment of this embodiment, the width of the first deformation joint is set to 100mm, which can just accommodate the expansion and contraction deformation of the structure under temperature changes.

[0053] See also Fig.10 As shown, in another embodiment of the present invention, a construction method of the waterproof structure of the connecting opening of the river foundation pit is provided. The waterproof structure of the connecting opening of the river foundation pit described above is adopted, and the construction method comprises the steps of: Step S 1 When making the main basement outer wall 11, a pre-buried steel plate 2 and an L-shaped reserved steel bar are arranged around the connection between the connecting port 14 and the main basement outer wall 11.

[0054] In this step, the embedded steel plate 2 and L-shaped reserved steel bars are pre-embedded during the construction of the main basement outer wall 11, providing a stable connection point for the subsequent installation of the connecting port structure. The embedded steel plate 2 can be tightly combined with the main basement outer wall 11, and the L-shaped reserved steel bars can be connected with the subsequent plate steel bars 15 to form an integral reinforced concrete structure, thereby enhancing the connection stability between the connecting port and the main basement outer wall, and effectively preventing the structure from loosening or displacement due to external forces.

[0055] Step S 2 : When the connecting port 14 is connected, the surrounding wall is chiseled out within the range of 1m of the connecting port and the outer expansion, and the shear groove 111 is chiseled on the surface of one side of the connecting port plate 141 close to the main basement outer wall 11; In this step, the chiseling of the shear groove 111 provides space for installing the expansion water stop strip 4, and also enhances the shear resistance between the main basement outer wall 11 and the later connecting port plate 141. When the structure is stressed, the shear groove 111 can effectively transmit the shear force, prevent structural damage caused by excessive shear force, and improve the structural stability of the entire connecting port area.

[0056] Step S 3 : Install the expansion water stop strip 4 in the shear groove 111; In this step, an effective waterproof barrier can be formed by installing the expansion water stop strip 4 in the shear groove 111. The expansion water stop strip 4 has the characteristic of swelling when it encounters water. When water penetrates, it will swell and fill the gap between the shear groove and the surrounding structure, forming a tight seal to prevent further water penetration, thereby improving the waterproof performance of the connection port area.

[0057] Step S 4 : Connect the plate reinforcement 15 with the L-shaped reserved reinforcement, and weld the water stop steel plate 3 in the connecting port plate 141 and the embedded steel plate 2 together.

[0058] In this step, the plate reinforcement 15 is connected to the L-shaped reserved reinforcement, and the water stop steel plate 3 in the later connecting port plate 141 is welded to the embedded steel plate 2, further enhancing the integrity of the entire connecting port structure. The connection between the plate reinforcement and the L-shaped reserved reinforcement forms an integral reinforcement skeleton between the later connecting port plate and the main basement outer wall, which can jointly bear external loads and improve the stability and bearing capacity of the structure.

[0059] This construction method adopts the method of connecting the connection port later, and uses the method of welding the pre-buried steel plate of the basement outer wall with the water-stop steel plate in the later connecting port plate to block the water on the outer side of the retaining structure, extend the water seepage route, and greatly improve the waterproof effect. By setting up shear grooves and expansion water-stop strips, the waterproof effect at the connecting port is further enhanced to avoid leakage.

[0060] Although the present invention is disclosed as above, the protection scope of the present invention is not limited thereto. Those skilled in the art may make various changes and modifications without departing from the spirit and scope of the present invention, and these changes and modifications will fall within the protection scope of the present invention.

Claims

1. A waterproof structure for a riverside foundation pit connection port, characterized in that: include: The structural self-waterproofing system includes a main basement outer wall, a subway side wall and a connecting port side wall formed by pouring reinforced concrete structure, wherein the main basement outer wall is connected to the subway side wall through the connecting port side wall, and a connecting port located in the connecting port side wall is formed between the main basement outer wall and the subway side wall; Pre-buried steel plates are pre-buried in the outer wall of the main basement; A water-stop steel plate connected to the embedded steel plate, and the water-stop steel plate is located inside the rear connecting port plate on the surface of the connecting port; An expansion water stop strip is arranged in the shear groove of the outer wall of the main basement; The outer protective structure comprises a rubber water stop strip arranged in the deformation joint node of the connecting port and a flexible full-cover waterproof layer laid on the connecting port.

2. The waterproof structure for the riverside foundation pit connection port according to claim 1 is characterized in that: A first deformation joint is provided between the side wall of the communication port and the side wall of the subway.

3. The waterproof structure for the riverside foundation pit connection port according to claim 2 is characterized in that: The rubber water stop is arranged in the first deformation joint between the subway side wall and the side wall of the connecting port.

4. The waterproof structure for the riverside foundation pit connection port according to claim 1 is characterized in that: The width of the embedded steel plate is not less than 100 mm, and the cross-sectional size of the shear groove is 100×100 mm.

5. The waterproof structure for the riverside foundation pit connection port according to claim 1 is characterized in that: The back-made connecting port plate is provided with plate reinforcement, and the plate reinforcement is connected with the L-shaped reserved reinforcement on the outer wall of the main basement.

6. The waterproof structure for the riverside foundation pit connection port according to claim 1 is characterized in that: The post-made connecting port plate includes a connecting port top plate located on the top wall of the connecting port, top steel bars are arranged around the connecting port top plate and the outer wall of the main basement, and the rubber water stop strip is arranged between the gaps of the top steel bars.

7. The waterproof structure for the riverside foundation pit connection port according to claim 3 is characterized in that: The post-made connecting port plate also includes a connecting port bottom plate located on the bottom wall of the connecting port, bottom steel bars are arranged around the connecting port bottom plate and the outer wall of the main basement, and the rubber water stop strip is arranged between the gaps of the bottom steel bars.

8. The waterproof structure for the riverside foundation pit connection port according to claim 7 is characterized in that: A concrete cushion layer is also provided on the lower surface of the bottom plate of the connecting port, and the thickness of the concrete cushion layer is 99-101 mm.

9. The waterproof structure for the riverside foundation pit connection port according to claim 2 is characterized in that: The width of the first deformation joint is set to 99-101 mm.

10. A construction method for a riverside foundation pit connecting port waterproof structure, applied to the riverside foundation pit connecting port waterproof structure as claimed in any one of claims 1 to 9, characterized in that: The construction method comprises the steps of: Step S1: When making the main basement outer wall, a pre-buried steel plate and L-shaped reserved steel bars are arranged around the connection between the connecting port and the main basement outer wall; Step S2: When making the rear connection of the connecting port, the surrounding wall is chiseled out within the range of 1m of the connecting port and the outer expansion, and a shear groove is chiseled on the surface of one side of the connecting port plate close to the outer wall of the main basement; Step S3: installing an expansion water stop strip in the shear groove; Step S4: Connect the plate reinforcement with the L-shaped reserved reinforcement, and weld the water-stop steel plate in the connecting port plate to the embedded steel plate.

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