A waterstop for a reserved ground wall joint for underground bypass construction

Abstract

The application relates to a water stop belt for a reserved ground wall joint for underground bypass construction, which is a hollow rubber cylinder in the center, one side of the hollow rubber cylinder is connected with a solid rubber body, the other side is connected with a rubber plate, and a combined steel edge is inserted into the lower part of the solid rubber body; the steel edge is in a combined and detachable structure. In the pipe jacking machine or shield tunneling machine tunneling opening door construction, the rubber steel edge water stop belt in the ground wall joint cannot be wound on the cutter head, and the required anti-permeation requirement is ensured.

Description

Technical Field

[0001] This invention relates to a waterstop for joints used in the construction of underground structures of buildings, and more particularly to a waterstop for the joint of a ground wall in the construction of a reserved bypass in an underground structure. Background Technology

[0002] With the increasing development of urban underground space, the use of bypass passages to connect the underground structures of various buildings is becoming more and more common. In the underground structures of buildings, diaphragm walls are usually used as retaining structures. When constructing bypass passages, it is necessary to open doorways in the diaphragm walls, and the rigid joints between the diaphragm walls usually use rubber-steel edge waterstops as water-stopping components.

[0003] Rubber-steel edged waterstops are composite components consisting of deformable rubber and a galvanized steel edge on one side. These waterstops primarily rely on the compression or stretching of the central rubber section within the concrete expansion joint to achieve a sealing and waterproofing effect.

[0004] Currently, during bypass construction, when using pipe jacking machines or tunnel boring machines for excavation, the steel edge can easily become entangled on the cutterhead as the cutterhead rotates and cuts the ground wall to create a doorway, affecting the excavation process.

[0005] How to prevent the rubber-steel edge waterstop in the wall joint from getting tangled on the cutterhead during the tunneling and opening of the tunnel using a pipe jacking machine or shield machine, while also preserving the impermeability of the joint in the existing wall, is a technical problem that needs to be solved. Summary of the Invention

[0006] To solve the above-mentioned technical problems, the purpose of this invention is to provide a waterstop for a reserved ground wall joint used in underground bypass construction. This waterstop ensures that the rubber-steel edge waterstop in the ground wall joint will not get tangled on the cutterhead during the tunneling and opening of the tunnel by a pipe jacking machine or a shield machine, and guarantees that the required anti-seepage requirements are met.

[0007] To achieve the above objectives, the technical solution of the present invention is: a waterstop for a reserved ground wall joint used in underground bypass construction, the center of which is a hollow rubber cylinder, a solid rubber body is connected to one side of the hollow rubber cylinder, and a rubber plate is connected to the other side. A steel edge is inserted into the lower part of the solid rubber body, and the steel edge is a detachable combined structure.

[0008] Furthermore, the solid rubber body is a solid rubber body with an "8" shaped cross-section.

[0009] Furthermore, the cross-section of the hollow rubber cylinder at the center is a hollow circle, and the material is rubber.

[0010] Furthermore, the rubber sheet has a long rectangular cross-section, with several solid protruding strips symmetrically arranged on both sides of the central plane of its long side. The protruding strips have rectangular cross-sections and are made of homogeneous rubber, which are used to increase the bonding with the concrete and prevent pull-out.

[0011] Furthermore, the steel edge is constructed by interlocking a set of unit steel sheets.

[0012] Furthermore, the thickness of the unit steel sheet is 0.4-1.2mm, and it is made using sheet metal processing. A folded ear is punched and bent on one side of the folded ear, which extends beyond the steel sheet body. The folded ear body protrudes from the steel sheet body. An arc-shaped protrusion is bent at the top of the folded ear, which faces the steel sheet body and is lower than the steel sheet body. The end of the protrusion is connected to a short flat section, which is coplanar with the steel sheet body.

[0013] Furthermore, a rectangular opening is punched out on the steel sheet body on the opposite side of the folded lug of the unit steel sheet, which matches the size of the arc protrusion of the folded lug.

[0014] The folded lug of the first unit steel sheet is inserted parallel to the opening of the second unit steel sheet, and the two interlock to form a whole. When an external force is applied to the protrusion of the folded lug of the first unit steel sheet, it can disengage from the opening of the second unit steel sheet and separate into two pieces.

[0015] The beneficial effects of this invention are as follows:

[0016] (1) The steel edge can be separated into several steel pieces under the action of external force, which facilitates the construction of the broken ground wall in pipe jacking / shield tunneling.

[0017] (2) Removing a portion of the waterstop in the wall will not affect the integrity of the steel edges of the waterstop in the wall at both ends that have not been removed, and can maintain the original impermeability. Attached Figure Description

[0018] Figure 1 This is a cross-sectional schematic diagram of the present invention;

[0019] Figure 2 This is a planar schematic diagram of the present invention;

[0020] Figure 3 This is a planar schematic diagram of the steel sheet socket engagement;

[0021] Figure 4 This is a cross-sectional schematic diagram of the steel plate socket engagement. Detailed Implementation

[0022] The technical solution of the present invention will be described in detail below with reference to the accompanying drawings and embodiments.

[0023] like Figure 1As shown in Figure 2, this invention provides a waterstop for a pre-reserved ground wall joint used in underground bypass construction. Its center is a hollow rubber cylinder 3, one side is a rubber plate 4, and the other side is a steel edge. The steel edge is constructed by interlocking a set of unit steel plates 1. The hollow rubber cylinder 3 has a hollow circular cross-section and is made of rubber. One side of the hollow rubber cylinder 3 is connected to a solid rubber body 2 with a figure-eight cross-section, and the steel edge 1 is inserted into this solid rubber body. The other side of the hollow rubber cylinder 3 has a rubber plate 4 with a long rectangular cross-section. Several solid protruding strips with rectangular cross-sections are symmetrically arranged on both sides of the central plane of the long side of the plate, made of homogeneous rubber, to increase the interlocking with the concrete and prevent pull-out.

[0024] like Figure 3 As shown in Figure 4, the steel edge is formed by several unit steel sheets 1 interlocking with each other to form a whole steel edge.

[0025] The unit steel sheet (thickness 0.4-1.2mm) is made using sheet metal processing. A folded ear is punched and bent on one side of the sheet, with the folded ear extending beyond the steel sheet. The folded ear body protrudes from the steel sheet body. An arc-shaped protrusion is bent at the top of the folded ear, facing the steel sheet body and being lower than the steel sheet body. A short flat section is connected to the end of the protrusion.

[0026] A rectangular opening is punched out on the steel sheet body on the opposite side of the folded lug of the unit steel sheet, which matches the arc protrusion of the aforementioned folded lug.

[0027] The folded lug of unit #1 steel sheet is inserted parallel to the opening of unit #2 steel sheet, and the two interlock to form a whole. When an external force is applied to the protrusion of the folded lug of unit #1 steel sheet, it can be dislodged from the opening of unit #2 steel sheet and separated into two pieces.

[0028] Example:

[0029] like Figure 1 , 2 As shown, the present invention comprises: a steel sheet 1, a solid rubber body 2 with an "8" shaped cross section, a hollow rubber cylinder 3, and a rubber plate 4.

[0030] like Figure 3 , 4 The folded lug of unit #1 steel sheet is inserted parallel to the opening of unit #2 steel sheet, and the two interlock to form a whole. Unit #3, #4, and so on are added sequentially until the required length for the specified depth of the floor wall is reached.

[0031] Place one side of the steel edge 1 of the rubber-steel edge waterstop of the present invention into the groove of the special joint box, with the protruding part with the folded lug facing the outside of the wall, and fix the waterstop. Place the joint box into the concrete trench section of the ground wall to be poured, then lower the steel cage, pour the concrete, and after the concrete has set and the rear trench section has been excavated, the joint box can be taken out, and the construction of the wedge joint ground wall can be completed in sequence.

[0032] When it is necessary to carry out the jacking / shield tunneling and opening of the access passage in the wall at this location in the future, the scraper on the cutterhead can push out or cut off the folded protrusions between the steel plates when cutting the concrete wall, so that they are separated from each other. The broken steel plates will not affect the integrity of the waterstop steel edge in the uncut wall at the upper and lower ends, thus maintaining the existing anti-seepage capacity.

Claims

1. A waterstop for use in a predrilled wall joint for underground bypass construction, characterized in that: The water stop center is a hollow rubber cylinder, one side of which is connected with a solid rubber body, and the other side is connected with a rubber plate, a steel edge is inserted into the lower part of the solid rubber body, and the steel edge is a combined detachable structure; the steel edge is composed of a group of unit steel sheets in a socket joint; the thickness of the unit steel sheet is 0.4-1.2mm, which is made of sheet metal process, and a folded ear is punched and bent on one side of the steel sheet, the folded ear protrudes from the steel sheet body; the folded ear body protrudes from the steel sheet body; the top end of the folded ear is bent into a circular arc-shaped protrusion, which faces one side of the steel sheet body, and the protrusion is lower than the steel sheet body; the end of the protrusion is connected with a small flat surface, which is coplanar with the steel sheet body; a rectangular opening is punched on the opposite side of the steel sheet body of the folded ear of the unit steel sheet, which is matched with the size of the circular arc protrusion of the folded ear; the folded ear of the first unit steel sheet is inserted into the opening of the second unit steel sheet in parallel, and the two are mutually engaged to form a whole, when an external force acts on the protrusion of the folded ear of the first unit steel sheet, it can make it come out of the opening of the second unit steel sheet, and separate into two pieces.

2. The waterstop for use in a reserve pit wall joint for underground bypass construction according to claim 1, characterized by: The solid rubber body is a solid rubber body with an "8" shaped cross section.

3. The waterstop for use in a reserve pit wall joint for underground bypass construction according to claim 1, characterized by: The cross section of the hollow rubber cylinder is a hollow circle, and the material is rubber.

4. The waterstop for use in a reserve pit wall joint for underground bypass construction according to claim 1, characterized by: The cross section of the rubber plate is a long rectangle, and a plurality of solid protruding strips are symmetrically arranged on both sides of the central axis of the long side of the cross section, the cross section of the protruding strip is rectangular, and the material is homogeneous rubber, which is used to increase the engagement with the concrete and prevent pulling out.

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