Inter-amplitude joint waterproof structure of underground diaphragm wall

Abstract

The utility model discloses an inter-amplitude joint waterproof structure of an underground diaphragm wall. The inter-amplitude joint waterproof structure comprises a first water stop belt and a first cover plate, the underground diaphragm wall comprises an underground diaphragm wall, the underground diaphragm wall comprises an excavation face, the wall connecting plate is lower than the excavation face of the underground diaphragm wall in the direction perpendicular to the excavation face, and a first containing groove is formed in the position, close to the excavation face, of the wall connecting plate and the width joint. The first water-stop belt is arranged in the first accommodating groove, and two wings of the first water-stop belt are correspondingly bonded with two sides of the inter-width seam; the first cover plate is arranged on the excavation face corresponding to the first containing groove, and the first cover plate is detachably connected with the underground diaphragm wall. Compared with a middle-buried rubber water-stop belt, the waterproof structure is higher in waterproof reliability and more convenient to maintain, and the first water-stop belt adopts a built-in bonding mode, so that the water-stop belt can be protected from being damaged on the construction site of cross operation.

Description

Technical Field

[0001] This utility model relates to the field of waterproofing technology for diaphragm walls, specifically a waterproofing structure for the joints between sections of a diaphragm wall. Background Technology

[0002] Diaphragm walls are increasingly widely used in construction engineering, and waterproofing between diaphragm sections is a key technology. Traditionally, the waterproofing structure for diaphragm wall joints uses embedded rubber waterstops, while the wall itself is made of reinforced concrete. Due to the lack of adhesion between concrete and rubber, and factors such as concrete shrinkage, creep, aging, and hardening of the rubber waterstop, gaps exist between the wall and the embedded rubber waterstop. Furthermore, the embedded rubber waterstop, located in the middle of the wall, cannot be effectively repaired, leading to frequent leaks at the joints of diaphragm wall sections. Utility Model Content

[0003] The purpose of this utility model is to provide a waterproof structure for the inter-section joints of a diaphragm wall, which can improve the reliability of waterproofing between the inter-section joints of the diaphragm wall and is easy to maintain.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0005] A waterproof structure for inter-span joints of a diaphragm wall, comprising a first waterstop and a first cover plate;

[0006] The inter-section joint is provided with a wall connecting plate. The underground continuous wall includes an excavation surface. In the direction perpendicular to the excavation surface, the wall connecting plate is lower than the excavation surface of the underground continuous wall. The wall connecting plate and the inter-section joint form a first receiving groove near the excavation surface.

[0007] The first waterstop is built into the first receiving groove, and the two wings of the first waterstop are correspondingly bonded to the two sides of the inter-width joint.

[0008] The first cover plate is disposed on the excavation surface corresponding to the first receiving groove, and the first cover plate is detachably connected to the underground continuous wall.

[0009] In some embodiments, the first waterstop includes a U-shaped outer shell and polyurethane foam disposed within the U-shaped outer shell.

[0010] In some embodiments, the U-shaped outer shell is elastic.

[0011] In some embodiments, the U-shaped housing includes an open end and a closed end opposite to the open end, the open end facing the wall connecting plate and the closed end facing the first cover plate.

[0012] In some embodiments, the wall connecting plate includes a first end near the excavation surface, the first end having a plurality of connecting holes, the center line of the connecting holes being perpendicular to the excavation surface, the connecting holes being used to detachably connect the forming template of the first receiving groove to the wall connecting plate.

[0013] In some embodiments, the wall connecting plate includes a first plate perpendicular to the excavation surface and a second plate parallel to the excavation surface. The first plate is located at the inter-width joint, and the second plate extends into the wall on both sides of the inter-width joint. The interior of the wall includes a reinforcing cage, and the second plate is connected to the reinforcing cage.

[0014] In some embodiments, the waterproof structure further includes a second waterstop, a waterstop elbow, and a second cover plate;

[0015] A second receiving groove is provided in the basement floor slab corresponding to the joint between the sections;

[0016] The second waterstop is built into the second receiving groove, and the waterstop elbow is connected to the first waterstop and the second waterstop respectively;

[0017] The second cover plate is disposed on the basement floor slab corresponding to the second receiving groove, and the second cover plate is detachably connected to the basement floor slab.

[0018] In some embodiments, the cross-sections of the waterstop elbow, the first waterstop, and the second waterstop are all U-shaped structures; the end of the waterstop elbow is provided with a lip, and the first and second waterstops overlap the lip of the waterstop elbow and are bonded and fixed to the lip.

[0019] Compared with the prior art, the present invention has at least the following beneficial effects:

[0020] Since the first waterstop is embedded in the first receiving groove in the inter-width joint, and the two wings of the first waterstop are bonded to the two sides of the inter-width joint, there are no leakage gaps at the joint of the wall. Therefore, compared with the embedded rubber waterstop, the waterproof structure of this utility model has higher waterproof reliability.

[0021] The first waterstop is installed close to the excavation face of the underground continuous wall and is bonded, making the maintenance of the waterproof structure of this utility model more convenient than that of the embedded rubber waterstop.

[0022] The first waterstop uses an internal adhesive method, which can protect the waterstop from damage during construction sites with overlapping operations. Attached Figure Description

[0023] Figure 1 Schematic diagrams of some embodiments of the joint waterproofing structure for diaphragm walls;

[0024] Figure 2 for Figure 1 Enlarged view of section A in the middle;

[0025] Figure 3 This is a schematic diagram of the forming template;

[0026] Figure 4 for Figure 3 A sectional view;

[0027] Figure 5 This is a diagram showing the combined state of the molded template and the wall connection plate;

[0028] Figure 6 This is a schematic diagram of the wall connection plate;

[0029] Figure 7 This is a diagram showing the combined state of the joint box, wall connection plate, and molding template;

[0030] Figure 8 This is a schematic diagram of the entire wall construction.

[0031] Figure 9 This is a schematic diagram of the construction of a single wall panel;

[0032] Figure 10 This is a schematic diagram of the wall after the pouring is completed;

[0033] Figure 11 for Figure 10 Enlarged view of section B;

[0034] Figure 12 This is a schematic diagram of the first waterstop, the waterstop elbow, and the second waterstop before they are combined.

[0035] Figure 13 This is a schematic diagram showing the combination of the first waterstop, the waterstop elbow, and the second waterstop.

[0036] Figure 14 This is a diagram showing the state of the second waterstop, waterstop elbow, and second cover plate after they are installed on the floor.

[0037] Figure label:

[0038] 100. Diaphragm wall; 101. First wall section; 102. Inter-section joint; 103. Second wall section; 104. First receiving groove; 105. Third wall section; 200. Wall connecting plate; 201. Connecting hole; 202. Second plate; 203. First plate; 300. First waterstop; 301. Outer shell; 302. Polyurethane foam; 400. First cover plate; 401. Top burst bolt; 500. Forming template; 501. Countersunk hole; 502. Countersunk bolt; 600. Joint box; 700. Reinforcing cage; 800. Waterstop elbow; 801. Lip; 900. Second waterstop; 1000. Second cover plate; 1100. Basement floor slab; 1101. Second receiving groove. Detailed Implementation

[0039] This invention employs an adhesive-bonded waterstop, with its two wings bonded to the concrete walls on both sides of the joint between the sections, eliminating gaps between the waterstop and the joint and significantly improving the waterproofing reliability of the joint. Because the waterstop is positioned on the excavated side of the diaphragm wall, close to the excavation face, maintenance is convenient, ensuring the service life of the waterproofing project matches that of the building.

[0040] The technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the embodiments of this utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of this utility model.

[0041] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," such descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, features defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this utility model.

[0042] Combination Figure 1 and Figure 2 In some embodiments, the waterproofing structure of the inter-span joint 102 of the diaphragm wall 100 includes a first waterstop 300 and a first cover plate 400.

[0043] The diaphragm wall 100 is a concrete wall, comprising an excavation face and an oncoming face, which are spatially opposite each other. Figure 1 The upper middle side is the excavation face, and the lower side is the soil-facing face.

[0044] The joint 102 between sections is provided with a wall connecting plate 200, in the direction perpendicular to the excavation face, i.e. Figure 2 In the vertical direction, the wall connecting plate 200 is lower than the excavation surface of the underground continuous wall 100, so that the wall connecting plate 200 and the inter-panel joint 102 form a first receiving groove 104 near the excavation surface.

[0045] The first waterstop 300 is built into the first receiving groove 104, and the two wings of the first waterstop 300 are correspondingly bonded to the two sides of the inter-width joint 102.

[0046] The first cover plate 400 is disposed on the excavation face corresponding to the first receiving groove 104, and the first cover plate 400 is detachably connected to the diaphragm wall 100. Specifically, the first cover plate 400 is detachably connected to the wall by the top explosion bolt 401, and the first cover plate 400 is preferably a steel plate.

[0047] Since the first waterstop 300 is embedded in the first receiving groove 104 in the inter-width joint 102, and the two wings of the first waterstop 300 are correspondingly bonded to the two sides of the inter-width joint 102, there are no leakage gaps at the joint of the wall. Therefore, compared with the embedded rubber waterstop, the waterproof structure has higher waterproof reliability.

[0048] Since the first waterstop 300 is set close to the excavation face of the underground continuous wall 100 and is connected to the wall by adhesive, the first waterstop 300 can be removed and replaced after the first cover plate 400 is removed. This makes the maintenance of this waterproof structure more convenient than that of the embedded rubber waterstop. Through maintenance, the service life of the waterproof project can be made consistent with the service life of the building.

[0049] Because the first waterstop 300 uses an internal bonding method, it can protect the waterstop from damage during construction sites with overlapping operations.

[0050] The first receiving groove can be formed directly during the wall pouring process, specifically by using a forming template 500 to form the first receiving groove 104. Figure 3 and Figure 4 The structure of the molding template 500 is shown. Figure 5 The structure after the molding template 500 and the wall connecting plate 200 are combined is shown.

[0051] Combination Figures 1 to 5 The wall connecting plate 200 includes a first end near the excavation face, the first end being... Figure 5The upper end of the wall connecting plate 200 has multiple connecting holes 201 at its first end. The center line of the connecting holes 201 is perpendicular to the excavation surface. The connecting holes 201 are used to detachably connect the forming template 500 to the wall connecting plate 200. The forming template 500 has countersunk holes 501, which correspond to the connecting holes 201 on the wall connecting plate 200. Countersunk bolts 502 are installed in the countersunk holes 501 and are connected to the connecting holes 201 on the wall connecting plate 200 to connect the forming template 500 to the first end of the wall connecting plate 200.

[0052] Before pouring the wall, the forming template 500 is connected to the first end of the wall connecting plate 200. After the wall is poured, the forming template 500 is removed. The groove formed by the forming template 500 in the wall is the first receiving groove 104, which is used to install the first waterstop 300.

[0053] By detachably connecting the molding template 500 to the first end of the wall connecting plate 200, a first receiving groove 104 can be reserved when casting the molded wall.

[0054] Combination Figure 1 , Figure 6 and Figure 8 The wall connecting plate 200 includes a first plate 203 perpendicular to the excavation surface and a second plate 202 parallel to the excavation surface. The first plate 203 is located at the inter-width joint 102, and the second plate 202 extends into the wall on both sides of the inter-width joint 102. The interior of the wall includes a reinforcing cage 700, and the second plate 202 is connected to the reinforcing cage 700. The forming template 500 is connected to the first plate 203.

[0055] In this embodiment, the wall connecting plate 200 has one second plate 202, and the wall connecting plate 200 is cross-shaped. The wall connecting plate 200 may also have two or more second plates 202, all of which are arranged in parallel.

[0056] By welding the second plate 202 of the wall connecting plate 200 to the reinforcing cage 700, the forming template 500, the wall connecting plate 200 and the reinforcing cage 700 are integrated into one unit, which can reduce the displacement of the wall connecting plate 200 during the wall pouring process, make the first receiving groove 104 basically perpendicular to the excavation surface of the wall, and make the first waterstop 300 easy to install.

[0057] The first waterstop 300 has a strip-shaped structure, and the width of the first waterstop 300 is adapted to the width of the first receiving groove 104.

[0058] The first waterstop 300 can be a waterstop made of a single material or a composite material waterstop.

[0059] Waterstops made of a single material can be, for example, polyvinyl chloride waterstops, rubber waterstops, or waterstops made of other polymer materials.

[0060] Reference Figure 2 One embodiment of the composite material first waterstop 300 specifically includes a U-shaped outer shell 301 and a polyurethane foam 302 disposed within the U-shaped outer shell 301. The U-shaped outer shell 301 includes an open end and a closed end opposite to the open end. The open end faces the wall connecting plate 200, and the closed end faces the first cover plate 400. The closed end of the U-shaped outer shell 301 may or may not contact the first cover plate 400. The U-shaped outer shell 301 is elastic, and the material of the outer shell 301 can be polyvinyl chloride, rubber, or other polymer materials. The polyurethane foam 302 has the property of maintaining the shape of the outer shell 301. The outer shell 301 has good strength, which facilitates bonding and provides good sealing performance. The use of the elastic outer shell 301 can compensate for the width change of the first receiving groove 104 caused by deformation.

[0061] The construction method for the above-mentioned waterproof structure is as follows:

[0062] Step 1: Fabricate a 600mm joint box, a 200mm wall connection plate, a 500mm forming template, and a 700mm rebar cage. Figure 7 The assembly state of the connector box 600, wall connection plate 200, and forming template 500 is shown.

[0063] Step 2: Complete all wall construction, such as... Figure 8 As shown, the first wall section 101 and the third wall section 105 are poured first, followed by the second wall section 103. Figure 8 The left side is the first wall panel 101, the right side is the third wall panel 105, and the middle is the second wall panel 103. Before pouring the third wall panel 105, remove the connector box 600 on the right side of the first wall panel 101 and the connector box 600 on the left side of the third wall panel 105, and so on, to complete all the walls. (Refer to...) Figure 9 The construction of a single wall section is as follows: A grab bucket is used to excavate a trench; a 600mm joint box is installed inside the trench; a 700mm reinforcing cage, a 200mm wall connection plate, and a 500mm precast formwork are then installed; concrete is poured to complete the construction of the single wall section. After construction, the 200mm wall connection plate remains within the 100mm diaphragm wall, while the 600mm joint box does not remain within the 100mm diaphragm wall.

[0064] Step 3: After excavating the inner side of the diaphragm wall 100, the inter-panel joint 102 is exposed, refer to... Figure 10 and Figure 11 Remove the countersunk bolt 502, take off the molding template 500, and clean and repair the concrete surface inside the joint.

[0065] Step 4: Use epoxy resin adhesive to bond the first waterstop strip 300.

[0066] Step 5: Install the first cover plate 400 on the outer facade of the first waterstop 300, and fix it with a top bolt 401 on one side of the first cover plate 400.

[0067] Construction is now complete. The post-construction condition is as follows: Figure 1 and Figure 2 As shown.

[0068] To achieve waterproofing at the joint between the diaphragm wall and the basement floor slab, the following treatment was applied at the end of the first waterstop 300mm:

[0069] Combination Figure 12 and Figure 14 The waterproof structure further includes a second waterstop 900, a waterstop elbow 800, and a second cover plate 1000.

[0070] On the basement floor slab 1100, a groove 60mm deep, 20mm wide, and 100mm long is cut at the position corresponding to the inter-width joint 102 to form a second receiving groove 1101. The second waterstop 900 is bonded to the second receiving groove 1101 with epoxy resin adhesive. The waterstop elbow 800 is bonded to the first waterstop 300 and the second waterstop 900 respectively. The second cover plate 1000 is set on the basement floor slab corresponding to the second receiving groove 1101. One side of the second cover plate 1000 is fixed with a top bolt 401 and is detachably connected to the basement floor slab 1100.

[0071] By extending the water-stop structure of the inter-width joint 102 to the basement floor slab through the water-stop elbow 800 and the second water-stop 900, water is prevented from seeping in from the bottom of the inter-width joint 102, thereby achieving a better waterproofing effect.

[0072] The cross-sections of the waterstop elbow (800), the first waterstop (300), and the second waterstop (900) are all U-shaped.

[0073] The waterstop elbow 800 has a lip 801 at one end. The first waterstop 300 overlaps with the lip 801 at one end, and the second waterstop 900 overlaps with the lip 801 at the other end. The overlaps are bonded and fixed. Compared with the end-butt connection, the overlap connection has a larger connection surface. Combined with the bonded fixation of the overlap, it ensures that the strength of the waterstop at the connection point is not lower than the strength of the waterstop body.

[0074] Specifically, after the first waterstop 300, the second waterstop 900, and the waterstop elbow 800 are glued, they are clamped with a mold to ensure reliable bonding of the overlapping parts. The three are combined into a single component and then installed as a whole into the receiving groove of the wall and floor, making installation more convenient and reliable.

[0075] The present invention has been described in detail above through specific embodiments. These detailed descriptions are only intended to help those skilled in the art understand the content of the present invention and should not be construed as limiting the scope of protection of the present invention. Various modifications and equivalent transformations made by those skilled in the art to the above solutions under the concept of the present invention should be included within the scope of protection of the present invention.

Claims

1. A waterproof structure for the inter-panel joints (102) of a diaphragm wall (100), characterized in that: Includes a first waterstop (300) and a first cover plate (400); The inter-width joint (102) is provided with a wall connecting plate (200), the underground continuous wall (100) includes an excavation surface, and in the direction perpendicular to the excavation surface, the wall connecting plate (200) is lower than the excavation surface of the underground continuous wall (100), and the wall connecting plate (200) and the inter-width joint (102) form a first receiving groove (104) near the excavation surface; The first waterstop (300) is built into the first receiving groove (104), and the two wings of the first waterstop (300) are correspondingly bonded to the two sides of the inter-width joint (102). The first cover plate (400) is disposed on the excavation surface corresponding to the first receiving groove (104), and the first cover plate (400) is detachably connected to the underground continuous wall (100).

2. The waterproof structure of the inter-row joints (102) of the diaphragm wall (100) according to claim 1, characterized in that: The first waterstop (300) includes a U-shaped outer shell (301) and a polyurethane foam (302) disposed within the U-shaped outer shell (301).

3. The waterproof structure of the inter-row joints (102) of the diaphragm wall (100) according to claim 2, characterized in that: The U-shaped outer shell (301) is elastic.

4. The waterproof structure of the inter-row joints (102) of the diaphragm wall (100) according to claim 2, characterized in that: The U-shaped outer shell (301) includes an open end and a closed end opposite to the open end, the open end facing the wall connecting plate (200) and the closed end facing the first cover plate (400).

5. The waterproof structure of the inter-row joints (102) of the diaphragm wall (100) according to claim 1, characterized in that: The wall connecting plate (200) includes a first end near the excavation surface. The first end is provided with a plurality of connecting holes (201). The center line of the connecting holes (201) is perpendicular to the excavation surface. The connecting holes (201) are used to detachably connect the forming template (500) of the first receiving groove (104) to the wall connecting plate (200).

6. The waterproof structure of the inter-row joints (102) of the diaphragm wall (100) according to claim 5, characterized in that: The wall connecting plate (200) includes a first plate (203) perpendicular to the excavation surface and a second plate (202) parallel to the excavation surface. The first plate (203) is located at the inter-width joint (102), and the second plate (202) extends into the wall on both sides of the inter-width joint (102). The interior of the wall includes a reinforcing cage (700), and the second plate (202) is connected to the reinforcing cage (700).

7. The waterproof structure of the inter-row joints (102) of the diaphragm wall (100) according to claim 1, characterized in that: The waterproof structure also includes a second waterstop (900), a waterstop elbow (800), and a second cover plate (1000); A second receiving groove (1101) is provided in the basement floor slab corresponding to the inter-width joint (102); The second waterstop (900) is built into the second receiving groove (1101), and the waterstop elbow (800) is connected to the first waterstop (300) and the second waterstop (900) respectively. The second cover plate (1000) is disposed on the basement floor slab corresponding to the second receiving groove (1101), and the second cover plate (1000) is detachably connected to the basement floor slab.

8. The waterproof structure of the inter-row joints (102) of the diaphragm wall (100) according to claim 7, characterized in that: The cross-sections of the waterstop elbow (800), the first waterstop (300), and the second waterstop (900) are all U-shaped structures; The end of the waterstop elbow (800) is provided with a lip (801), and the first waterstop (300) and the second waterstop (900) overlap the lip (801) of the waterstop elbow (800) and are bonded and fixed to the lip (801).

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