An underground diaphragm wall rubber waterstop joint and its construction method

Abstract

The present application relates to the technical field of diaphragm walls, and particularly to a rubber waterstop joint for diaphragm walls, which comprises a joint plate and a rubber waterstop installed on the joint plate. One side of the rubber waterstop is poured into the concrete. The joint plate comprises a plate body and a groove body installed on the plate body. A groove hole for installing the rubber waterstop is formed in the middle of the groove body. The rubber waterstop comprises a serrated belt part, a trapezoidal solid part, a connecting spherical part and a steel edge part which are connected in sequence. The serrated belt part is located outside the groove hole and is poured into the concrete. The cross-section of the trapezoidal solid part is a trapezoidal structure, and the serrated belt part is connected to the long bottom side of the trapezoid formed by the trapezoidal solid part. The connecting spherical part is used for connecting the steel edge part and is located in the groove hole. Half of the trapezoidal solid part is clamped in the groove hole. The present application also discloses a construction method for the rubber waterstop joint of the diaphragm wall. The present application has the effect of reducing the tearing of the rubber waterstop when the joint plate is removed.

Description

Technical Field

[0001] The present application relates to the technical field of diaphragm walls, and in particular to a rubber waterstop joint for diaphragm walls and a construction method thereof. Background Art

[0002] A diaphragm wall is a deep groove excavated downward along the peripheral axis of a deep excavation project on the ground by a trenching machine. After placing a steel reinforcement cage in the groove, concrete is poured to form a unit cell segment. This is carried out section by section to build a continuous reinforced concrete wall structure underground. The diaphragm wall has the functions of water cutoff, seepage prevention, load bearing, and water retaining. During construction, for two adjacent unit cell segments that are poured successively, a waterstop needs to be set at the joint position to ensure the water cutoff and water retaining functions of the diaphragm wall.

[0003] A new type of split rubber waterstop joint plate is disclosed in the related art, which includes a front plate and a rear plate. Both the front plate and the rear plate are box-shaped structures. Ear plates are provided on both sides of the long side of the rear plate, and guide grooves are provided on both sides of the short side of the rear plate. Wing plates sleeved in the guide grooves are provided on both sides of the long side of the front plate. A slot hole is opened on the surface of the short side of the front plate, and a through hole penetrating the front plate is opened on the side of the slot hole. Rubber waterstops are inserted into the slot holes. During construction, a part of the rubber waterstop is exposed from the slot hole and is first poured into a unit cell segment. Then, after the excavation of the adjacent deep groove is completed, the joint plate is removed from the rubber waterstop so that the rubber waterstop located in the slot hole can be poured into another adjacent unit cell segment.

[0004] However, in the above structure, the rubber waterstop is inserted into the slot hole, resulting in a gap between the rubber waterstops on the inner wall of the slot hole. When mud enters the gap, the connection between the rubber waterstop and the joint plate is relatively firm, and it is easy to cause the rubber waterstop to tear when the joint plate is removed from the rubber waterstop. Summary of the Invention

[0005] In order to reduce the tearing of the rubber waterstop when the joint plate is removed, the present application provides a rubber waterstop joint for diaphragm walls and a construction method thereof.

[0006] The present application provides a rubber waterstop joint for diaphragm walls, adopting the following technical solution:

[0007] An underground diaphragm wall rubber waterstop joint, comprising a joint plate and a rubber waterstop installed on the joint plate. One side of the rubber waterstop is poured into the concrete. The joint plate includes a plate body and a groove body installed on the plate body. A groove hole for installing the rubber waterstop is formed in the middle of the groove body. The rubber waterstop includes a serrated tooth belt part, a trapezoidal solid part, a connecting spherical part and a steel edge part connected in sequence. The serrated tooth belt part is located outside the groove hole and is poured into the concrete. The cross-section of the trapezoidal solid part is a trapezoidal structure, and the serrated tooth belt part is connected to the long bottom edge of the trapezoid formed by the trapezoidal solid part. The connecting spherical part is used to connect the steel edge part and is located in the groove hole. Half of the trapezoidal solid part is clamped in the groove hole.

[0008] By adopting the above technical solution, during use, the groove body is installed on the plate body. The groove hole formed by the groove body is used to place the connecting spherical part and the steel edge part. At the opening of the groove hole is the trapezoidal solid part. Since the longer bottom edge of the trapezoidal solid part is connected to the serrated tooth belt part, the serrated tooth belt part is located outside the groove hole. Thus, the trapezoidal solid part can seal the opening of the groove hole. At the same time, the groove hole can also accurately position the rubber waterstop. When pouring concrete at the position of the serrated tooth belt part, the concrete squeezes the trapezoidal solid part, further improving the sealing performance and reducing the entry of cement slurry in the concrete into the groove hole. Thus, when disassembling the joint plate, the rubber waterstop is easily separated from the joint plate. At the same time, the trapezoidal solid part has a lower precision requirement for the groove hole, and both the manufacturing and use processes can reduce costs and increase the turnover times of the joint plate.

[0009] Preferably, a limiting device is provided at the upper end of the joint plate. The limiting device is fixed on the joint plate and is used to abut against the ground under the gravity of the joint plate.

[0010] By adopting the above technical solution, the limiting device is provided at the upper end of the joint plate. After the limiting device is fixed to the joint plate, the limiting device abuts against the ground under the gravity of the joint plate, limiting the angle of the joint plate, reducing the deflection of the joint plate with the rubber waterstop, improving the installation accuracy of the rubber waterstop, and facilitating the peeling of the joint plate.

[0011] Preferably, the joint plate further includes a main box body. The main box body includes two pouring panels and a connecting plate. The connecting plate is parallel and spaced from the plate body. The two pouring panels are symmetrically arranged on both sides of the connecting plate and form a box structure with the connecting plate and the plate body. The groove body is arranged on the side of the connecting plate away from the plate body. The pouring panels are inclined to the connecting plate, and the distance between the two pouring panels on the side close to the connecting plate is less than the distance on the side close to the plate body.

[0012] By adopting the above technical solution, the main box body includes two casting panels and a connecting plate. The box body structure formed by the cooperation of the two casting panels and the connecting plate and the plate body makes the joint plate have higher strength. At the same time, the distance between the two casting panels on the side close to the connecting plate is less than the distance on the side close to the plate body, which is convenient for the joint plate to be peeled off from the cast concrete. During the splicing of adjacent two sections of concrete in the later stage, the joint surface is long and can also have a good waterproof effect.

[0013] Preferably, a plurality of reinforcing bars are arranged in the main box body. The two ends of the reinforcing bars are welded to the plate body, the connecting plate or the casting panel. The reinforcing bars are located at the included angle between the casting panel and the connecting plate or between the casting panel and the plate body; a reinforcing auxiliary box is arranged on the side of the plate body far away from the main box body.

[0014] By adopting the above technical solution, reinforcing bars are arranged in the main box body, and the reinforcing bars are located at the included angle between the casting panel and the connecting plate or between the casting panel and the plate body. Thus, the deformation of the main box body can be reduced through the reinforcing bars, and the overall strength of the joint plate can be improved in cooperation with the reinforcing auxiliary box, thereby improving the service life of the joint plate.

[0015] Preferably, a limiting device is arranged at the upper end of the joint plate. The limiting device includes a body and a fixing screw. Installation parts are reserved on both sides of the plate body. An installation groove is formed on one side of the body. The installation groove is used for placing the reinforcing auxiliary box. The installation parts are attached to the surface of the body where the installation groove is formed. The fixing screw is threadedly connected to the joint plate, and the end of the fixing screw is used to abut against the installation part to fix the joint plate to the body.

[0016] By adopting the above technical solution, an installation groove is formed on one side of the body, and the position of the reinforcing auxiliary box is placed in the installation groove to position the joint plate on the body. Then, the fixing screw is used to clamp the installation part, and the joint plate is fixed on the body, so that the limiting device is fixedly connected to the joint plate.

[0017] Preferably, the reinforcing auxiliary box includes a sub-board and two side boards. The sub-board is parallel to and spaced from the plate body. The two side boards are symmetrically arranged on both sides of the sub-board. The sub-board, the plate body and the two side boards form a box body structure.

[0018] By adopting the above technical solution, the sub-board and the two side boards cooperate to form a reinforcing auxiliary box with a box body structure, which makes the strengthening effect of the reinforcing auxiliary box on the plate body better, improves the bending resistance of the joint plate, further improves the service life of the joint plate, and at the same time, the weight of the joint plate is lighter, reducing the manufacturing cost of the joint plate.

[0019] Preferably, the groove body includes two inclined plates and two groove plates. The two groove plates are perpendicular to the plate body. The two groove plates are parallel and spaced apart. The groove hole is formed between the two groove plates. The inclined plates are inclined with respect to the groove plates. One side of the inclined plate is welded to the side of the groove plate away from the plate body, and the other side is fixedly connected to the plate body.

[0020] By adopting the above technical solution, the two groove plates are parallel and spaced apart, so that the position between the two groove plates is used to place the rubber water stop. At the same time, the inclined plates are inclined with respect to the groove plates, and the inclined plates can strengthen the strength of the groove plates and reduce the deformation of the groove plates during use.

[0021] Preferably, the groove body includes a bent plate and a clamping plate. The plate body is provided with a connecting plate in parallel. There are two bent plates which are symmetrically arranged on both sides of the connecting plate. The bent plates and the connecting plate are arranged at an acute angle. There are two clamping plates which correspond to the two bent plates one by one. The clamping plate includes a connecting portion, a clamping portion and an abutting portion which are connected in sequence. When the clamping portions on the two clamping plates are parallel, they are used to form the groove hole. The side of the connecting portion away from the clamping portion is used to be hinged on the bent plate. A driving block is arranged at a position of the abutting portion away from the clamping portion. One side of the driving block abuts on the connecting plate, and an airbag is arranged on the side of the driving block close to the bent plate.

[0022] By adopting the above technical solution, the clamping plate includes a connecting portion, a clamping portion and an abutting portion. The connecting portion is hinged to the bent plate. The two clamping portions are used to clamp the rubber water stop relatively. The driving block abuts on the abutting portion. When the airbag connected to the driving block is inflated, the airbag will push the driving block to move towards the clamping plate, and the rubber water stop can be loosened after the airbag is released, thus facilitating the disassembly of the joint plate.

[0023] Preferably, a plurality of driving blocks are arranged. Each driving block corresponds to one joint plate. The airbags between adjacent two driving blocks are connected by an air pipe, and a connecting rod is arranged between adjacent two driving blocks. The connecting rod is fixedly connected to the driving block.

[0024] By adopting the above technical solution, a plurality of driving blocks are arranged. Adjacent two driving blocks are connected by a connecting rod, which is convenient for the driving blocks to be taken out first. The airbags in a plurality of driving blocks are connected by an air pipe. Each airbag can individually correspond to one clamping plate. When the airbag is inflated, a plurality of clamping plates can clamp the rubber water stop.

[0025] The present application provides a construction method for a rubber water stop joint of a diaphragm wall, adopting the following technical solution:

[0026] A construction method for the joint of a rubber waterstop in a diaphragm wall, including installing the rubber waterstop. First, the rubber waterstop is installed into the slot of the joint plate, and then the joint plate is lifted. A limiting device is fixedly arranged at the upper end of the joint plate, and when the limiting device is placed on the ground, the lower end of the joint plate is spaced from the bottom of the slot.

[0027] By adopting the above technical solution, the joint plate with the rubber waterstop is lifted, the limiting device is fixed on the joint plate, and at the same time, when the joint plate is placed in the slot, it is spaced from the bottom of the slot. Thus, the gravity of the joint plate can be transmitted to the ground through the limiting device, and further, the position of the limiting device can control the position of the rubber waterstop, reducing the deflection of the rubber waterstop.

[0028] In summary, the present application includes at least one of the following beneficial technical effects:

[0029] 1. The trapezoidal solid part can seal the opening of the slot, and at the same time, the slot can accurately position the rubber waterstop. When the concrete extrudes the trapezoidal solid part, the sealing performance can be further improved, reducing the entry of cement slurry in the concrete into the slot. Thus, when the joint plate is disassembled, the rubber waterstop can be easily separated from the joint plate;

[0030] 2. The limiting device is abutted against the ground by the gravity of the joint plate, so that the limiting device limits the angle of the joint plate, reducing the deflection of the joint plate with the rubber waterstop and improving the installation accuracy of the rubber waterstop;

[0031] 3. The driving block abuts against the abutting part. When the airbag connected to the driving block is inflated, the airbag will push the driving block towards the direction of the clamping plate. After releasing the airbag, the rubber waterstop can be released, thus facilitating the disassembly of the joint plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 is the top view of the first embodiment of the present application;

[0033] Figure 2 is the structural schematic diagram of the joint plate in the first embodiment of the present application;

[0034] Figure 3 is the installation structural schematic diagram of the limiting device in the first embodiment of the present application;

[0035] Figure 4 is the excavation sequence schematic diagram of the trench excavator in the first embodiment of the present application;

[0036] Figure 5 is the position diagram of the conduit in the first embodiment of the present application;

[0037] Figure 6 is the schematic diagram of the peeling process of the joint plate in the first embodiment of the present application;

[0038] Figure 7 It is a schematic structural diagram of the tank body in the second embodiment of the present application;

[0039] Figure 8 It is a schematic connection structure diagram of adjacent driving blocks in the second embodiment of the present application.

[0040] Explanation of reference numerals: 1. Connector plate; 11. Plate body; 111. Installation part; 12. Main box body; 121. Casting panel; 122. Connecting plate; 123. Reinforcing bar; 13. Tank body; 131. Inclined plate; 132. Tank plate; 133. Bent plate; 134. Clamping plate; 1341. Connecting part; 1342. Clamping part; 1343. Abutting part; 135. Sealing strip; 136. Driving block; 137. Airbag; 138. Air pipe; 139. Connecting rod; 14. Tank hole; 15. Reinforcing auxiliary box; 151. Auxiliary plate; 152. Side plate; 2. Rubber water stop; 21. Sawtooth belt part; 22. Trapezoidal solid part; 23. Connecting spherical part; 24. Steel edge part; 3. Limiting device; 31. Body; 311. Installation groove; 32. Fixed screw; 33. Connecting ear; 34. Pressing seat; 4. Guide wall; 5. Grooving machine; 6. Steel reinforcement cage; 7. Conduit; 8. Excavator. Detailed implementation manners

[0041] The following further elaborates on the present application with reference to the attached Figure 1-8 drawings.

[0042] The embodiment of the present application discloses an underground diaphragm wall rubber water stop joint and its construction method.

[0043] Embodiment 1:

[0044] This embodiment discloses an underground diaphragm wall rubber water stop joint. Referring to Figure 1 , it includes a connector plate 1 and a rubber water stop 2 arranged on the connector plate 1. The connector plate 1 is used to be arranged at the end of the excavation trench, so that the concrete poured in the excavation trench forms a preset shape at the connector plate 1, and at the same time, it is convenient to position the rubber water stop 2, improving the anti-seepage effect of the underground diaphragm wall.

[0045] Referring to Figure 2, the joint plate 1 includes a plate body 11, a main box body 12 and a groove body 13. The vertical length of the plate body 11 is set to 10 m. When the excavation groove depth is greater than 10 m, the joint plate 1 is spliced along the length direction and fixed by welding, so that the joint plate 1 can adapt to the required groove depth. The main box body 12 includes two pouring panels 121 and a connecting plate 122. The connecting plate 122 is parallel to the plate body 11 and has the same length as the plate body 11. Both sides of the connecting plate 122 are used to install two pouring panels 121. The two pouring panels 121, the plate body 11 and a connecting plate 122 form a box structure. One side of the pouring panel 121 is welded to the plate body 11, and the other side is welded to the edge of the connecting plate 122. And the two pouring panels 121 are symmetrically arranged on both sides of the connecting plate 122. The distance between the side of the two pouring panels 121 close to the plate body 11 is greater than the distance between the side of the two pouring panels 121 close to the connecting plate 122, so that the pouring panel 121 is arranged obliquely to the plate body 11. The surface of the pouring panel 121 far from the center of the plate body 11 is the pouring surface for contacting with concrete, so that the poured concrete forms a preset shape, and at the same time, it is convenient to remove the joint plate 1 from the solidified concrete. In order to improve the connection strength between the main box body 12 and the plate body 11, a plurality of reinforcing bars 123 are arranged inside the main box body 12. The reinforcing bars 123 are welded and fixed on the surfaces of the plate body 11, the connecting plate 122 and the pouring panel 121 located on the inner wall of the main box body 12. The reinforcing bars 123 are located at the angles formed by the plate body 11 and the pouring panel 121 or the pouring panel 121 and the connecting plate 122. Thus, the reinforcing bars 123 can reduce the deformation of the main box body 12 when stressed; at the same time, the main box body 12 and the plate body 11 can improve the overall bending strength of the joint plate 1.

[0046] Reference Figure 2 , the groove body 13 includes two inclined plates 131 and two groove plates 132. The two groove plates 132 are parallel and spaced apart to form a groove hole 14 between the two groove plates 132. The two groove plates 132 are perpendicular to the plate body 11. A rubber water stop 2 is placed in the groove hole 14. The position of the groove hole 14 corresponds to the middle of the connecting plate 122. One inclined plate 131 is correspondingly arranged with one groove plate 132. One side of the groove plate 132 is welded and fixed to the connecting plate 122, and the other side is welded to the inclined plate 131. One side edge of the inclined plate 131 is connected to the groove plate 132, and the other side is welded and fixed to the connecting plate 122. The inclined plate 131 is parallel to the pouring panel 121. The inclined plate 131, the groove plate 132 and the connecting plate 122 form a triangular box structure, so that the position of the groove plate 132 is relatively firm and can be turned over more times during use.

[0047] Reference Figure 1 and Figure 2, a reinforcing auxiliary box 15 is fixedly arranged on the surface of the plate body 11 away from the main box body 12. The reinforcing auxiliary box 15 includes a secondary plate 151 and two side plates 152. The secondary plate 151 is parallel to the plate body 11 and is arranged at an interval from the plate body 11. One side of the side plate 152 is welded to the surface of the plate body 11, and the other side is welded to the side edge of the secondary plate 151. The two side plates 152 are symmetrically arranged on both sides of the secondary plate 151. The two side plates 152 and the secondary plate 151 form an isosceles trapezoidal box structure, and the distance between the two side plates 152 close to the secondary plate 151 is less than the distance between the two side plates 152 close to the plate body 11. The connection between the reinforcing auxiliary box 15 and the plate body 11 can improve the bending resistance of the joint plate 1 and further improve the service life of the joint plate 1. During use, the reinforcing auxiliary box 15 is located on the side of the plate body 11 away from the cast concrete. When it is necessary to remove the joint plate 1 from the cast concrete, an excavator 8 is used on the ground to apply a force to the upper end of the joint plate 1 in a direction away from the concrete, so that the joint plate 1 is gradually peeled off from the rubber water stop 2 from top to bottom. Installation parts 111 are reserved at the outer sides of the side plates 152 welded on both sides of the plate body 11 and the casting panel 121. The positions of the installation parts 111 are used to install the limiting device 3, and the limiting device 3 is used to fix the joint plate 1 so that the joint plate 1 is fixed on the ground.

[0048] Reference Figure 2, the rubber water stop 2 includes a sawtooth belt portion 21, a trapezoidal solid portion 22, a connecting spherical portion 23 and a steel edge portion 24. The sawtooth belt portion 21, the trapezoidal solid portion 22 and the connecting spherical portion 23 are all made of rubber material, and the rubber water stop 2 is made into a whole according to the depth of the grooving to avoid splicing in the middle. At the same time, steel fibers are added to the sawtooth belt portion 21, the trapezoidal solid portion 22 and the connecting spherical portion 23 within 2m of the lower end of the rubber water stop 2. The steel fibers strengthen the rubber water stop 2. When peeling the joint plate 1, the steel fibers can improve the strength of the rubber water stop 2 and reduce the tearing of the rubber water stop 2. The sawtooth belt portion 21, the trapezoidal solid portion 22, the connecting spherical portion 23 and the steel edge portion 24 are connected in sequence, and the sawtooth belt portion 21 is the part first poured into the concrete. The cross-section of the trapezoidal solid portion 22 is an isosceles trapezoid. The sawtooth belt portion 21 is located in the middle of the long bottom side of the trapezoid formed by the trapezoidal solid portion 22. The connecting spherical portion 23 is connected to the middle position of the short bottom side of the trapezoid formed by the trapezoidal solid portion 22. The steel edge portion 24 is connected to the side of the connecting spherical portion 23 away from the trapezoidal solid portion 22, so that the steel edge portion 24 is embedded in the connecting spherical portion 23. When the rubber water stop 2 is connected to the slot hole 14, both the connecting spherical portion 23 and the steel edge portion 24 are inserted into the slot hole 14. At the same time, half of the trapezoidal solid portion 22 is extruded into the slot hole 14, and the other half is located outside the slot hole 14, that is, the width of the slot hole 14 is less than the long bottom side of the trapezoid formed by the trapezoidal solid portion 22 and greater than the short bottom side of the trapezoid formed by the trapezoidal solid portion 22. The rubber water stop 2 can seal the opening position of the slot hole 14 through the trapezoidal solid portion 22, and can be further extruded into the slot hole 14 when being extruded by the concrete, reducing the entry of the slurry in the concrete into the slot hole 14. In addition, the trapezoidal solid portion 22 reduces the accuracy requirement for the width of the slot hole 14, which is beneficial to cost control in the manufacture of the joint plate 1 and can increase the turnover times during use, thereby reducing costs.

[0049] Reference Figure 1 and Figure 3, first, a guide wall 4 is set on the ground. The depth of the guide wall 4 is 1.2 m. An excavation trench is dug at the middle position of the guide wall 4. The limiting device 3 is placed on the upper surface of the guide wall 4 and straddles the two guide walls 4. The limiting device 3 includes a body 31 and a fixing screw 32. One side of the body 31 is for placing the joint plate 1, and an installation groove 311 is formed on the body 31. The shape of the installation groove 311 is the same as that of the reinforcement auxiliary box 15, so that the reinforcement auxiliary box 15 can be placed in the installation groove 311. At the same time, the installation parts 111 on both sides of the plate body 11 are correspondingly abutted against the surface of the body 31 where the installation groove 311 is opened. A connecting ear 33 is fixedly arranged on the body 31. The connecting ear 33 is L-shaped, so that the connecting ear 33 and the body 31 are arranged at the installation part 111. The fixing screw 32 is threadedly connected to the connecting ear 33 and is perpendicular to the installation part 111. One end of the fixing screw 32 close to the body 31 is rotatably installed on the pressure seat 34, and the pressure seat 34 abuts against the installation part 111. A plurality of fixing screws 32 are symmetrically installed on both sides of the body 31. Through the fixing screws 32, the pressure seat 34 fixes the joint plate 1 on the body 31, and further fixes the limiting device 3 on the guide wall 4 to position the joint plate 1, making the direction of the rubber water stop 2 more accurate and facilitating the installation of the rubber water stop 2 and the peeling of the joint plate 1.

[0050] This embodiment also discloses a construction method for the rubber water stop joint of the diaphragm wall, which is used to form a rubber water stop joint of the diaphragm wall disclosed in the above embodiment, including constructing the guide wall 4, excavating the trench, installing the rubber water stop 2, pouring concrete and removing the joint plate 1.

[0051] Reference Figure 4 , when excavating the trench, a trenching machine 5 is used to dig downward at the middle position of the guide wall 4. The excavation depth is based on the design depth. In this embodiment, the excavation depth is 38 m, and the excavation length of one section is 6 m. After the first section is excavated, two rubber water stops 2 are lowered, and then concrete is poured. The second trench is excavated at a position adjacent to the first section, and then the joint plate 1 is removed. During the process of excavating the trench, first, the part close to the joint plate 1 is excavated, then the part far from the joint plate 1 is excavated, and finally the middle part is excavated. Each section of excavation is carried out three times from top to bottom.

[0052] Reference Figure 5 , when installing the rubber water stop 2, first lift the rubber water stop 2 and the joint plate 1 into the trench, and then stop at a position 1 m from the joint plate 1 to the bottom of the trench. Fix the limiting device 3 on the joint plate 1. At the same time, the height of the joint plate 1 is less than 1 m. After adjusting the direction of the joint plate 1, place the limiting device 3 on the guide wall 4. The limiting device 3 is pressed on the guide wall 4 by the gravity of the joint plate 1, reducing the deflection of the rubber water stop 2 caused by the sliding of the limiting device 3 on the guide wall 4.

[0053] ReferenceFigure 5 , concrete is poured. When pouring the concrete, first place the steel reinforcement cage 6 in the excavated groove, then insert the conduit 7 into the excavated groove, and gradually pour the concrete upward from the bottom of the excavated groove through the conduit 7 until the excavated groove is filled with concrete.

[0054] Reference Figure 6 , remove the joint plate 1. Use the excavator 8 to pull at the upper end of the joint plate 1. Apply a horizontal force with the excavator 8 to peel the rubber water stop 2 from the joint plate 1, and gradually peel the rubber water stop 2 from top to bottom. To ensure that the rubber water stop 2 is fully peeled, the excavator 8 pulls the joint plate 1 at least 3 times back and forth.

[0055] Embodiment 2:

[0056] This embodiment discloses a rubber water stop joint for a diaphragm wall. Reference Figure 7 , the difference from Embodiment 1 is that the groove body 13 includes a bent plate 133 and a clamping plate 134. One side of the bent plate 133 is flush with the pouring panel 121 and is welded and fixed to the connecting plate 122, and the other side is parallel to the connecting plate 122. There are two bent plates 133, and the two bent plates 133 are symmetrically and spaced apart. There are two clamping plates 134 corresponding to the two bent plates 133 one by one. The clamping plates 134 are located inside the bent plates 133. The clamping plate 134 includes a connecting portion 1341, a clamping portion 1342, and an abutting portion 1343. The connecting portion 1341, the clamping portion 1342, and the abutting portion 1343 are connected in sequence. The clamping portions 1342 of the two clamping plates 134 face each other to form a slot hole 14. The side of the connecting portion 1341 away from the clamping portion 1342 is hinged to the inside of the bent plate 133; when the two clamping portions 1342 are parallel, the connecting portion 1341 is parallel to the connecting plate 122 and abuts against the portion of the clamping plate parallel to the connecting plate 122. A sealing strip 135 is fixedly arranged on the surface of the connecting portion 1341 in contact with the clamping plate. The sealing strip 135 is used to seal the abutting position between the connecting portion 1341 and the bent plate 133 to reduce the entry of cement slurry in the concrete into the hinged position between the connecting portion 1341 and the bent plate 133. The abutting portion 1343 is connected to the side edge of the clamping portion away from the connecting portion 1341 and extends in a direction away from the slot hole 14.

[0057] Reference Figure 8, a driving block 136 is provided at the angle between the bent plate 133 and the connecting plate 122. The cross-section of the driving block 136 is a triangular structure. One side of the driving block 136 abuts against the connecting plate 122. One of the two sides of the driving block 136 away from the abutting plate is parallel to the bent plate 133, and the other side is used to abut against the abutting portion 1343. An airbag 137 is fixedly provided on the side of the driving block 136 parallel to the bent plate 133. The airbag 137 extends from the driving block 136. At the same time, a trachea 138 is connected to the airbag 137. After the airbag 137 is inflated, the airbag 137 can squeeze the driving block 136 to move closer to the middle of the connecting plate 122, so that the two clamping plates 134 approach each other relatively and clamp the trapezoidal solid part 22 on the rubber water stop 2 in the slot hole 14. When it is necessary to disassemble the joint plate 1, first release the gas in the airbag 137 through the trachea 138, take out the driving block 136 from the groove body 13, and then the two clamping plates 134 loosen the rubber water stop 2, which further facilitates the peeling of the joint plate 1.

[0058] Reference Figure 8 , when multiple joint plates 1 need to be spliced, a connecting rod 139 is provided between the driving blocks 136 in adjacent two joint plates 1. Both ends of the connecting rod 139 are fixedly connected to the ends of the driving blocks 136. The airbags 137 on the two driving blocks 136 are connected through the trachea 138. When inflating multiple airbags 137, multiple airbags 137 can individually correspond to one clamping plate 134. Even if the moving distances of different clamping plates 134 are different due to shape changes, after the multiple airbags 137 are filled with gas, they can simultaneously clamp the rubber water stop 2 by multiple clamping plates 134.

[0059] The above are all the preferred embodiments of the present application, and the protection scope of the present application is not limited accordingly. Therefore, all equivalent changes made according to the structure, shape, and principle of the present application should be covered within the protection scope of the present application.

Claims

1. An underground diaphragm wall rubber waterstop joint, comprising a joint plate (1) and a rubber waterstop (2) installed on the joint plate (1), one side of the rubber waterstop (2) being poured into concrete, characterized in that: The joint plate (1) includes a plate body (11) and a groove body (13) installed on the plate body (11). A groove hole (14) for installing a rubber waterstop (2) is formed in the middle of the groove body (13). The rubber waterstop (2) includes a serrated belt portion (21), a trapezoidal solid portion (22), a connecting spherical portion (23), and a steel edge portion (24) connected in sequence. The serrated belt portion (21) is located outside the groove hole (14) and is poured into the concrete. The cross-section of the trapezoidal solid portion (22) is a trapezoidal structure, and the serrated belt portion (21) is connected to the long bottom edge of the trapezoid formed by the trapezoidal solid portion (22). The connecting spherical portion (23) is used to connect the steel edge portion (24) and is located in the groove hole (14). Half of the trapezoidal solid portion (22) is clamped in the groove hole (14). A limiting device (3) is provided at the upper end of the joint plate (1). The limiting device (3) is fixed on the joint plate (1) and is used to abut against the ground under the gravity of the joint plate (1). The joint plate (1) further includes a main box body (12). The main box body (12) includes two pouring panels (121) and a connecting plate (122). The connecting plate (122) is parallel to and spaced from the plate body (11). The two pouring panels (121) are symmetrically arranged on both sides of the connecting plate (122) and form a box structure with the connecting plate (122) and the plate body (11). The groove body (13) is arranged on the side of the connecting plate (122) away from the plate body (11). The pouring panels (121) are inclined to the connecting plate (122), and the distance between the two pouring panels (121) on the side close to the connecting plate (122) is less than the distance on the side close to the plate body (11). A plurality of reinforcing bars (123) are arranged in the main box body (12). The two ends of the reinforcing bars (123) are welded to the plate body (11), the connecting plate (122), or the pouring panel (121). The reinforcing bars (123) are located at the angles between the pouring panel (121) and the connecting plate (122) or between the pouring panel (121) and the plate body (11). A reinforcing auxiliary box (15) is arranged on the side of the plate body (11) away from the main box body (12). The limiting device (3) includes a body (31) and a fixing screw (32). Installation parts (111) are reserved on both sides of the plate body (11). An installation groove (311) is formed on one side of the body (31). The reinforcing auxiliary box (15) is placed in the installation groove (311). The installation part (111) is attached to the surface of the body (31) where the installation groove (311) is opened. The fixing screw (32) is threadedly connected to the joint plate (1), and the end of the fixing screw (32) is used to abut against the installation part (111) to fix the joint plate (1) to the body (31). The slot body (13) includes a bent plate (133) and a clamping plate (134). The plate body (11) is arranged parallel to the connecting plate (122). There are two bent plates (133) which are symmetrically arranged on both sides of the connecting plate (122). The bent plate (133) and the connecting plate (122) are arranged at an acute angle. There are two clamping plates (134) which correspond to the two bent plates (133) one by one. The clamping plate (134) includes a connecting portion (1341), a clamping portion (1342) and an abutting portion (1343) which are connected in sequence. When the clamping portions (1342) on the two clamping plates (134) are parallel, they are used to form the slot hole (14). The side of the connecting portion (1341) away from the clamping portion (1342) is used to be hinged on the bent plate (133). A driving block (136) is arranged at a position of the abutting portion (1343) away from the clamping portion (1342). One side of the driving block (136) abuts on the connecting plate (122), and an airbag (137) is arranged on the side of the driving block (136) close to the bent plate (133).

2. The rubber water stop joint for diaphragm wall according to claim 1, characterized in that: The reinforcing auxiliary box (15) includes a auxiliary plate (151) and two side plates (152). The auxiliary plate (151) is parallel and spaced from the plate body (11). The two side plates (152) are symmetrically arranged on both sides of the auxiliary plate (151). The auxiliary plate (151), the plate body (11) and the two side plates (152) form a box structure.

3. The rubber water stop joint for diaphragm wall according to claim 1, characterized in that: There are multiple driving blocks (136). Each driving block (136) corresponds to a joint plate (1). The airbags (137) between adjacent two driving blocks (136) are connected by a trachea (138). And a connecting rod (139) is arranged between adjacent two driving blocks (136). The connecting rod (139) is fixedly connected with the driving block (136).

4. A construction method for a rubber waterstop joint of a diaphragm wall, which is used to fabricate a rubber waterstop joint of a diaphragm wall according to any one of claims 1-3, characterized in that: It includes installing a rubber water stop (2). First, the rubber water stop (2) is installed into the slot hole (14) of the joint plate (1). Then the joint plate (1) is lifted. A limiting device (3) is fixedly arranged at the upper end of the joint plate (1). And when the limiting device (3) is placed on the ground, the lower end of the joint plate (1) is spaced from the slot bottom.

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