Waterproof structure of new and old connecting structure in reverse construction method

Abstract

The utility model relates to a waterproof structure of a new-old connecting structure in a reverse building method. The waterproof structure comprises an underground diaphragm wall, a bottom plate connected with the underground diaphragm wall and a water stop belt arranged between the underground diaphragm wall and the bottom plate and used for preventing water from seeping inwards. The water stop belt comprises a long steel plate fixed to the underground diaphragm wall in advance and a water stop steel plate fixed to the long steel plate in a welded mode. The long steel plate is located at the joint of the underground diaphragm wall and the bottom plate. The water stop steel plate is located on the side, close to the bottom plate, of the long steel plate and embedded in the bottom plate. The waterstop steel plate and the long steel plate are arranged between the underground diaphragm wall and the bottom plate to form a waterstop, water can be effectively prevented from seeping into the basement, and the waterproof function of the basement is achieved.

Description

Technical Field

[0001] This application relates to the technical field of building construction, and in particular to a waterproof structure for a reverse construction method for connecting old and new structures. Background Technology

[0002] Currently, as an important component of buildings, the waterproofing of basements is directly related to the structural safety of the building. Once a basement leaks, the foundation soil will lose its supporting effect, leading to serious consequences such as building subsidence and tilting.

[0003] With the maturation of reverse construction technology, it has been widely applied in the construction of basements. In this process, the diaphragm wall is a crucial component, and the basement slab must be poured only after the diaphragm wall is completed. The joint between the first-poured diaphragm wall and the subsequently poured basement slab is a major cause of basement leakage; therefore, the waterproofing of this joint needs to be considered. This application proposes a waterproof structure for achieving waterproofing between new and old connection structures in reverse construction. Utility Model Content

[0004] When constructing a basement using the reverse construction method, in order to ensure reliable waterproofing at the joint between the first-cast diaphragm wall and the subsequently-cast basement floor slab, this application provides a waterproofing structure for the connection between the old and new structures in the reverse construction method.

[0005] This application provides a waterproof construction method for connecting old and new structures using a reverse construction approach, employing the following technical solution:

[0006] A waterproof structure for a reverse construction method connecting old and new structures includes a diaphragm wall, a base plate joined to the diaphragm wall, and a waterstop strip installed between the diaphragm wall and the base plate to prevent water seepage. The waterstop strip includes a long steel plate pre-fixed to the diaphragm wall and a waterstop steel plate welded and fixed to the long steel plate. The long steel plate is located at the joint between the diaphragm wall and the base plate. The waterstop steel plate is installed along the length of the joint surface between the base plate and the diaphragm wall, and is located on the side of the long steel plate closer to the base plate. The waterstop steel plate is embedded in the base plate.

[0007] By adopting the above technical solution, the water-stop steel plate and long steel plate are set between the diaphragm wall and the base plate to form a barrier structure. While directly blocking water seepage, it also greatly extends the effective sealing length of the sealing surface, which can effectively prevent water from seeping into the basement and improve the waterproof function of the basement.

[0008] Preferably, the water-stop steel plate is perpendicular to the long steel plate, and the water-stop steel plate is fully welded and fixed to the long steel plate.

[0009] By adopting the above technical solution, the water-stop steel plate is perpendicular to the long steel plate, which achieves a good water-blocking effect; the water-stop steel plate is fully welded and fixed to the long steel plate, which further enhances the connection strength between the water-stop steel plate and the long steel plate, and at the same time makes the water-stop steel plate and the long steel plate have good sealing performance.

[0010] Preferably, the width of the waterstop steel plate is set to 400~600mm.

[0011] By adopting the above technical solution, the width of the waterstop steel plate is set to 400~600mm, which expands the range of water stopper that prevents water seepage and enhances the waterproof effect of the waterstop.

[0012] Preferably, the joint surface between the diaphragm wall and the base plate is provided with a toothed groove, and the toothed groove is provided along the length direction of the joint surface between the base plate and the diaphragm wall; the long steel plate is located in the toothed groove and is provided along the length of the toothed groove.

[0013] By adopting the above technical solution, the base plate is filled with grooves during casting. The grooves can extend the joint surface between the diaphragm wall and the base plate, thereby enhancing the sealing performance between the diaphragm wall and the base plate.

[0014] Preferably, the waterstop also includes anchor bolts, which are fixed to the side of the long steel plate away from the base plate and are pre-embedded in the diaphragm wall; the anchor bolts are perpendicular to the long steel plate and multiple anchor bolts are provided.

[0015] By adopting the above technical solution, the anchor bolts are pre-embedded in the diaphragm wall to facilitate the fixing of the long steel plate to the toothed groove; the setting of multiple anchor bolts enhances the connection stability between the anchor bolts and the long steel plate.

[0016] Preferably, the anchor bolts are arranged in two rows along the vertical direction, with multiple anchor bolts evenly arranged along the length of the tooth groove in each row, and the spacing between adjacent anchor bolts in the same row is set to 500mm.

[0017] By adopting the above technical solution, the anchor bolts are arranged in two rows to further enhance the connection stability between the long steel plate and the anchor bolts; the spacing between adjacent anchor bolts in the same row is set to 500mm, which saves materials while ensuring the connection stability between the anchor bolts and the long steel plate.

[0018] Preferably, it also includes grouting conduits embedded in the base slab, one end of which is located at the joint surface between the diaphragm wall and the base slab, and the other end of which extends out of the base slab away from the diaphragm wall; multiple grouting conduits are arranged along the length of the joint surface between the base slab and the diaphragm wall.

[0019] By adopting the above technical solution, after the base slab is poured, the grout is injected into the joint surface between the diaphragm wall and the base slab through the grouting pipe. The grout fills the joint and seals it, further preventing water from seeping into the basement. The setting of multiple grouting pipes improves the efficiency of grouting.

[0020] Preferably, it also includes a grouting pipe pre-embedded in the base slab, the grouting pipe being arranged along the length of the joint surface between the base slab and the diaphragm wall; a grout outlet is provided on the side of the grouting pipe near the diaphragm wall, and multiple grout outlets are provided and evenly arranged along the length of the grouting pipe, with the spacing between two adjacent grout outlets set to 200~300mm; the end of each grouting conduit near the diaphragm wall is connected to the grouting pipe, and the spacing between two adjacent grouting conduits is set to 5~6m.

[0021] By adopting the above technical solution, after the base slab is poured, grout is injected into one end of the grouting pipe. The grout enters the grouting pipe through the grouting pipe and enters the joint between the base slab and the diaphragm wall through the grout outlet. The grout fills the joint and seals it, further preventing water from seeping into the basement. Multiple grout outlets are evenly spaced along the length of the grouting pipe, making the grout filling of the joint more uniform, saving grout consumption, and improving grouting efficiency. The spacing between two adjacent grouting pipes is set to 5~6m, ensuring grouting efficiency while saving materials.

[0022] Preferably, it also includes a water-swellable sealant, which is located at the junction of the diaphragm wall and the base plate and is embedded in the base plate. The water-swellable sealant is arranged along the length of the junction surface between the base plate and the diaphragm wall.

[0023] By adopting the above technical solution, the water-swellable sealant expands upon contact with water, further preventing water from seeping into the basement and enhancing the waterproofing effect of the basement.

[0024] Preferably, the side of the diaphragm wall closest to the base plate is roughened to form an uneven, rough surface.

[0025] By adopting the above technical solution, roughening treatment can increase the contact area between the diaphragm wall and the base plate, and reduce the formation of gaps and cracks between the diaphragm wall and the base plate.

[0026] In summary, this application includes at least one of the following beneficial technical effects:

[0027] 1. The long steel plate and water-stop steel plate installed between the diaphragm wall and the base slab form a water-stop strip, which effectively prevents water from seeping into the basement and achieves the waterproof function of the basement;

[0028] 2. A grouting pipe is installed between the diaphragm wall and the base slab. Grouting fills the joint between the diaphragm wall and the base slab to seal the joint, further preventing water from seeping into the basement.

[0029] 3. At the junction of the diaphragm wall and the base slab, water-swellable sealant is pre-embedded in the base slab. The water-swellable sealant expands when exposed to water, further preventing water from seeping into the basement.

[0030] 4. The joint surface between the diaphragm wall and the base plate is provided with a toothed groove. When the base plate is poured, the toothed groove is filled. The toothed groove extends the joint surface between the diaphragm wall and the base plate, thereby enhancing the sealing performance between the diaphragm wall and the base plate. Attached Figure Description

[0031] Figure 1 This is a schematic diagram of the overall structure of an embodiment of this application;

[0032] Figure 2 This is a schematic diagram of the waterstop structure in the embodiments of this application;

[0033] Figure 3 This is a schematic diagram showing the position and structure of the grouting conduit and grouting pipe in the embodiments of this application.

[0034] Attached reference numerals: 1. Diaphragm wall; 2. Base plate; 3. Toothed groove; 4. Waterstop strip; 41. Anchor bolt; 42. Long steel plate; 43. Waterstop steel plate; 5. Grouting conduit; 6. Grouting pipe; 7. Water-swellable sealant. Detailed Implementation

[0035] The following is in conjunction with the appendix Figure 1 -Appendix Figure 3 This application will be described in further detail.

[0036] This application discloses a waterproof structure for a reverse-construction method for connecting old and new structures.

[0037] Reference Figure 1 A waterproof structure for a reverse construction method connecting the old and new structures includes a diaphragm wall 1, a base plate 2 connected to the diaphragm wall 1, a waterstop 4 installed between the diaphragm wall 1 and the base plate 2 to prevent water seepage, a grouting conduit 5 and a grouting pipe 6 embedded in the base plate 2, and a water-swellable sealant 7 installed at the joint between the diaphragm wall 1 and the base plate 2.

[0038] Reference Figure 1 and Figure 2 A groove 3 is provided on the joint surface between the diaphragm wall 1 and the base slab 2. The groove 3 is set along the length of the joint surface between the diaphragm wall 1 and the base slab 2, and the interface of the groove 3 is trapezoidal. When the base slab 2 is poured, the concrete fills the groove 3, which extends the joint surface between the base slab 2 and the diaphragm wall 1, thereby enhancing the sealing performance between the diaphragm wall 1 and the base slab 2. During the pouring of the diaphragm wall, extruded polystyrene boards are pre-embedded in the side wall of the diaphragm wall to create space for the groove 3. After the diaphragm wall is formed, the extruded polystyrene boards are removed to expose the groove 3.

[0039] Before pouring the base slab 2, the surface of the diaphragm wall 1 near the base slab 2 is roughened to create an uneven surface, which increases the contact area between the diaphragm wall 1 and the base slab 2, thereby improving the bonding force between them and effectively reducing the formation of gaps and cracks.

[0040] Reference Figure 1 and 2 The waterstop 4 includes anchor bolts 41, long steel plates 42 and waterstop steel plates 43. Anchor bolts 41 are vertically welded and fixed to one side of a long steel plate 42. The long steel plate 42 is attached to the bottom of the toothed groove 3 and is set along the length of the toothed groove 3. Anchor bolts 41 are pre-embedded in the diaphragm wall 1. Multiple anchor bolts 41 are provided and are evenly arranged along the length of the toothed groove 3. The spacing between two adjacent anchor bolts 41 is set to 500mm. There are two rows of anchor bolts 41 in the vertical direction. The spacing between the two rows of anchor bolts 41 is 100~150mm. In this embodiment, 100mm is selected. Waterstop steel plate 43 is set along the length of the toothed groove 3 and is fully welded and fixed to the long steel plate 42. Waterstop steel plate 43 is perpendicular to the long steel plate 42. The width of waterstop steel plate 43 is designed to be 400~600mm. In this embodiment, 500mm is selected. The width of waterstop steel plate 43 is designed to ensure the range of water infiltration blocked by waterstop strip 4. While saving materials, the waterproof effect of waterstop strip 4 is more reliable.

[0041] Reference Figure 1 and Figure 3 The grouting pipe 6 is located at the junction of the diaphragm wall 1 and the base plate 2 and is set along the length of the junction surface. The grouting pipe 6 is located below the toothed groove 3. A grout outlet is opened on the side of the grouting pipe 6 away from the base plate 2. One end of the grouting conduit 5 extends out of the base plate 2 and is exposed above the base plate 2, which is convenient for construction personnel to grout. The other end of the grouting conduit 5 is connected to the side of the grouting pipe 6 near the base plate 2. There are multiple grouting conduits 5, and the distance between two adjacent grouting conduits 5 is set to 5~6m. In this embodiment, 5m is selected. Grouting is injected into multiple grouting conduits 5 at the same time, which improves the grouting efficiency. There are multiple grout outlets and they are evenly arranged along the length of the grouting pipe 6. The distance between adjacent grout outlets is set to 200~300mm. In this embodiment, 250mm is selected. This makes the grout filling of the junction more uniform and saves the amount of grout used.

[0042] In this embodiment, multiple grouting pipes 6 are provided, all of which are arranged along the length of the joint surface between the diaphragm wall 1 and the base plate 2, and are located at the joint between the diaphragm wall 1 and the base plate 2. They are arranged in a staggered manner along the vertical direction, and both ends of the grouting pipe 6 are connected to grouting conduits 5. In other embodiments, the grouting pipe 6 can be a pipe arranged along the length of the joint surface between the diaphragm wall 1 and the base plate 2, with its length corresponding to the length of the joint surface. Multiple grouting conduits 5 are connected to the grouting pipe 6 along the length of the pipe body.

[0043] After the base slab 2 is poured, grout is injected into one end of the grouting pipe 5. The grout enters the grouting pipe 6 through the grouting pipe 5 and enters the joint between the base slab 2 and the diaphragm wall 1 through the grout outlet. The grout fills the joint and seals it, further preventing water from seeping into the basement and enhancing the waterproofing effect of the basement.

[0044] Water-swellable sealant 7 is embedded in the base plate 2. The water-swellable sealant 7 is located below the grouting pipe 6 and is set along the length of the joint surface between the diaphragm wall 1 and the base plate 2. The water-swellable sealant 7 expands when exposed to water and fully fills the joint between the old and new structures, further preventing water from seeping into the basement and enhancing the waterproofing effect of the basement.

[0045] The implementation principle of this application embodiment is as follows: During the construction process of building a basement using the reverse construction method, a toothed groove 3 is formed by reserving space for the extruded polystyrene board to create a toothed groove 3; a long steel plate 42 is fixed by anchor bolts 41 embedded in the diaphragm wall 1 to fix a water-stop steel plate 43 in the toothed groove 3, and the anchor bolts 41, the long steel plate 42, and the water-stop steel plate 43 form a water-stop strip 4 to prevent water from seeping into the basement; by injecting grout into the grouting pipe 5, the joint surface between the diaphragm wall 1 and the base plate 2 is sealed, further preventing water from seeping into the basement; and a water-swellable sealant 7 is installed at the joint between the diaphragm wall 1 and the base plate 2 to further prevent water from seeping into the basement.

[0046] In summary, the waterstop 4, grouting conduit 5, grouting pipe 6, and water-swellable waterproof sealant 7 form a three-layer waterproof layer at the joint between the diaphragm wall 1 and the base slab 2, effectively enhancing the waterproofness of the joint between the diaphragm wall 1 and the base slab 2, and giving the joint between the diaphragm wall 1 and the base slab 2 a reliable waterproof function.

[0047] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A waterproof construction method for connecting old and new structures using a reverse construction method, characterized in that, The system includes a diaphragm wall (1), a base plate (2) connected to the diaphragm wall (1), and a waterstop (4) installed between the diaphragm wall (1) and the base plate (2) to prevent water seepage. The waterstop (4) includes a long steel plate (42) pre-fixed on the diaphragm wall (1) and a waterstop steel plate (43) welded and fixed on the long steel plate (42). The long steel plate (42) is located at the joint between the diaphragm wall (1) and the base plate (2). The waterstop steel plate (43) is installed along the length of the joint surface between the base plate (2) and the diaphragm wall (1), and the waterstop steel plate (43) is located on the side of the long steel plate (42) closer to the base plate (2). The waterstop steel plate (43) is embedded in the base plate (2).

2. The waterproof structure of the reverse construction method for connecting old and new structures according to claim 1, characterized in that, The water-stop steel plate (43) is perpendicular to the long steel plate (42), and the water-stop steel plate (43) is fully welded and fixed on the long steel plate (42).

3. The waterproof construction of a reverse-construction new-old connection structure according to claim 2, characterized in that, The width of the waterstop steel plate (43) is set to 400~600mm.

4. The waterproof structure of the reverse construction method for connecting old and new structures according to claim 2, characterized in that, The joint surface between the diaphragm wall (1) and the base plate (2) is provided with a toothed groove (3), which is arranged along the length of the joint surface between the base plate (2) and the diaphragm wall (1); the long steel plate (42) is located in the toothed groove (3) and is arranged along the length of the toothed groove (3).

5. The waterproof structure of the reverse construction method for connecting old and new structures according to claim 4, characterized in that, The waterstop (4) also includes anchor bolts (41), which are fixed on the side of the long steel plate (42) away from the bottom plate (2). The anchor bolts (41) are embedded in the diaphragm wall (1). The anchor bolts (41) are perpendicular to the long steel plate (42), and there are multiple anchor bolts (41).

6. The waterproof construction of a reverse-construction connection structure for old and new structures according to claim 5, characterized in that, The anchor bolts (41) are arranged in two rows along the vertical direction. Multiple anchor bolts (41) are evenly arranged in each row along the length of the tooth groove (3), and the spacing between adjacent anchor bolts (41) in the same row is set to 500mm.

7. The waterproof structure of the reverse construction method for connecting old and new structures according to claim 1, characterized in that, It also includes grouting conduits (5) pre-embedded in the base plate (2). One end of the grouting conduit (5) is located at the joint surface between the diaphragm wall (1) and the base plate (2), and the other end of the grouting conduit (5) away from the diaphragm wall (1) extends out of the base plate (2). Multiple grouting conduits (5) are arranged along the length of the joint surface between the base plate (2) and the diaphragm wall (1).

8. The waterproof construction of a reverse-construction connection structure for old and new structures according to claim 7, characterized in that, It also includes a grouting pipe (6) pre-embedded in the base plate (2), the grouting pipe (6) being arranged along the length of the joint surface between the base plate (2) and the diaphragm wall (1); the grouting pipe (6) having a grout outlet on the side near the diaphragm wall (1), the grout outlet having multiple outlets and being evenly arranged along the length of the grouting pipe (6), the spacing between two adjacent outlets being set to 200~300mm; the end of each grouting conduit (5) near the diaphragm wall (1) being connected to the grouting pipe (6), the spacing between two adjacent grouting conduits (5) being set to 5~6m.

9. The waterproof structure of the reverse construction method for connecting old and new structures according to claim 1, characterized in that, It also includes a water-swellable sealant (7), which is located at the junction of the diaphragm wall (1) and the base plate (2) and is embedded in the base plate (2). The water-swellable sealant (7) is arranged along the length of the junction surface between the base plate (2) and the diaphragm wall (1).

10. The waterproof construction of a reverse-construction connection structure for old and new structures according to claim 1, characterized in that, The side of the diaphragm wall (1) closest to the base plate (2) is an uneven rough surface formed by chiseling.

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