CN206360713U - A kind of two pass seam waterproof device with segment bolt connector box duct pieces of shield tunnel - Google Patents

Abstract

The utility model relates to a double seam waterproof device with a segment bolt joint box shield tunnel segment, which is used for the joint surface between the adjacent first segment and the second segment in the shield tunnel For sealing, the first segment is connected to the second segment by bolts, the first segment is provided with a first segment bolt joint box at the bolt connection, and the second segment is connected by bolts There is a second segment bolt joint box, the waterproof device includes the first waterproof unit on the outer arc surface side of the joint surface, the second waterproof unit on the inner arc surface side of the joint surface, and the second waterproof unit on the inner arc surface side of the joint surface. A joint box waterproof unit that seals around a segment bolt joint box and a second segment bolt joint box and overlaps with the second waterproof unit. Compared with the prior art, the utility model has the advantages of high waterproof ability, convenient experimental verification and the like.

Description

A double joint waterproof device with segment bolt joint box shield tunnel segment

technical field

The utility model relates to the field of seam waterproofing engineering of existing shield tunnels, in particular to a double seam waterproof device with segment bolt joints and shield tunnel segments.

Background technique

In recent years, with the continuous development of underground space in my country and the continuous improvement of urban rail transit networks, the shield method has been widely used in urban subway tunnels and large underwater tunnels due to its advantages of high degree of mechanization, fast construction speed, and small environmental impact. widely used in engineering. According to the survey, water leakage in shield tunnels has become one of the main problems affecting the safety and operation of shield tunnels, especially for power tunnels, sewage tunnels, and subway tunnels. Water leakage not only brings many safety hazards to daily operations . With the emergence of high-pressure cross-river or sea-crossing tunnels, single-channel joint waterproofing can no longer meet the existing design requirements, and double-channel or even multi-channel waterproofing has been continuously adopted in the design of shield segment joint waterproofing.

During the investigation, it was found that, in addition to the leakage of water at the joints of the lining segments (circumferential joints and longitudinal joints), the leakage of the joint box bolt hole is also common, indicating that the joint box bolt hole is also the occurrence of water leakage one of the main locations. However, in the current shield tunnel design work, for the waterproof treatment of joint box bolts, grouting caulking and other treatment methods are usually only used at the hand holes of joint box bolts. In the actual project, according to the investigation, the water leakage disease at the bolt hole of the joint box is widespread and common, indicating that the current waterproof treatment method at the bolt hole of the joint box is not good, and it is urgent to be further improved, and a targeted scientific and rational design should be carried out.

For high water pressure tunnels crossing rivers and seas, as well as power tunnels and water conveyance tunnels, the joints of segments have high waterproof capacity and waterproof safety factor requirements. The design form of double-channel waterproof gasket is often adopted. By setting two elastic gaskets, a double-channel waterproof defense line is formed under pressure to ensure that there is at least one waterproof gasket even when the segment joint is opened on one side. It can withstand high water pressure, which greatly improves the safety factor of segment joint waterproofing and the stability of waterproofing ability. In addition, there is a gap between the bolt and the bolt hole of the joint box, and the bolt hand hole has been grouted and sealed. The actual situation shows that the general treatment methods such as grouting and sealed the bolt hand hole are not effective in waterproofing, and the waterproof ability is far away. Much smaller than elastic gaskets. Therefore, in the double-layer waterproof defense line, when the first waterproof line fails, water enters the central cavity under the action of water pressure. At this time, the bolt hole of the joint box in the central cavity becomes the most vulnerable part of the waterproof, and it is quickly damaged under the action of water pressure. If it is broken down, the overall waterproofing of the seams will fail. However, in this case, the second waterproofing is almost useless and meaningless. Therefore, for the joints of shield tunnel segments with double waterproofing, the waterproofing at the bolt holes of the joint box becomes the key to whether the double waterproofing can function effectively. At present, there is no design and device for this part at home and abroad.

Utility model content

The purpose of this utility model is to provide a double seam waterproof device with segment bolt joints and shield tunnel segments with high waterproof capacity and convenient experimental verification in order to overcome the defects of the above-mentioned prior art.

The purpose of this utility model can be achieved through the following technical solutions:

A double seam waterproof device with a segment bolt joint and a shield tunnel segment, which is used to seal the joint surface between the adjacent first segment and the second segment in the shield tunnel, and the The first segment is connected to the second segment by bolts, the first segment is provided with a first segment bolt joint box at the bolt connection, and the second segment is provided with a second segment at the bolt connection. Two-segment bolt joint box, the waterproof device includes the first waterproof unit arranged on the outer arc surface side of the joint surface, the second waterproof unit arranged on the inner arc surface side of the joint surface and the first segment bolt The joint box waterproof unit that is around the joint box and the second segment bolt joint box and overlaps with the second waterproof unit for sealing.

The first segment and the second segment are provided with waterproof unit grooves on the joint surface, and the first waterproof unit, the second waterproof unit and the joint box waterproof unit are all bonded to the waterproof unit inside the trench.

The joint box waterproof unit includes a first rubber elastic gasket arranged in the groove of the first segment waterproof unit and a second rubber elastic gasket arranged in the groove of the second segment waterproof unit. The position of the first rubber elastic sealing gasket and the second rubber elastic sealing gasket are opposite to each other for sealing.

The first waterproof unit, the second waterproof unit, the first rubber elastic gasket and the second rubber elastic gasket are EPDM rubber elastic gaskets, product-type water-swellable rubber gaskets or polyether-type rubber gaskets. Polyurethane water-swellable elastic gasket.

It is characterized in that the first rubber elastic gasket and the second rubber elastic gasket are open on the joint surface near the inner arc surface, and the opening side overlaps with the second waterproof unit to form a square or polygonal seal Waterproof structure.

The distance between the inner contour of the joint box waterproof unit and the outer contour of the joint box is not less than 50mm.

The first segment and the second segment are concrete segment, cast iron segment or steel fiber segment.

Compared with the prior art, the utility model has the following advantages:

1. High waterproof ability: the utility model replaces the original grouting sealing treatment by setting a waterproof gasket around the joint box, which effectively improves the waterproof ability of the bolt holes of the double-channel waterproof segment joint box and ensures the double-channel The effective performance of waterproof performance, in the case of one waterproof failure, prevents the bolt hole of the joint box from becoming a waterproof vulnerable part and is quickly broken down, and can resist external water pressure together with another waterproof gasket, so that the double waterproof can fully Effective play greatly improves the waterproof ability of shield tunnel joints.

2. Convenient experimental verification: Combined with the waterproof performance test of the specific bolt holes, the waterproof ability of the device can be accurately measured, and the double-channel waterproof design of the joints can be scientifically and rationally designed, which has a strong guiding significance for actual engineering.

Description of drawings

Fig. 1 is the plane layout diagram of the utility model at the seam.

Fig. 2 is a sectional view of section A-A in Fig. 1 .

Among them, 1. The first segment, 2. The second segment, 3. The first rubber elastic gasket, 4. The second rubber elastic gasket, 5. The first waterproof unit, 6. The second waterproof unit, 7. The first segment bolt joint box, 8. The second segment bolt joint box.

detailed description

The utility model will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

The implementation of the present utility model is described below through specific examples, and those skilled in the art can easily understand other advantages and effects of the present utility model from the content disclosed in this specification. The utility model can also be implemented or applied through other different specific implementation modes, and the details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the utility model.

It should be noted that the structures, proportions, sizes, etc. shown in the drawings attached to this specification are only used to match the content disclosed in the specification, for those who are familiar with this technology to understand and read, and are not used to limit the implementation of the utility model Therefore, it has no technical substantive meaning. Any modification of structure, change of proportional relationship or adjustment of size shall still fall within the scope of The technical content disclosed by the utility model must be within the scope covered.

As shown in Figures 1 and 2, the utility model includes a first rubber elastic gasket 3, a second rubber elastic gasket 4, a first waterproof unit 5, a second waterproof unit 6, and a first segment bolt joint box 7 , The second segment bolt joint box 8 . As shown in the figure, the first rubber elastic gasket 3 is pasted on the surface of the first segment 1, and the second rubber elastic gasket 4 is pasted on the surface of the second segment 2; the first waterproof unit 5 and the second waterproof unit 6 , arranged up and down in the seam of the first segment 1 and the second segment 2; the first rubber elastic gasket 3 and the second rubber elastic gasket 4 are connected to the second waterproof unit 6 by overlapping, An airtight waterproof device is formed around the joint box to resist a certain water pressure; the first segment bolt joint box 7 and the second segment bolt joint box 8 are respectively located inside the first segment 1 and the second segment 2, and the first segment 1 and the second segment 2 are bolted through the first segment bolt joint box 7 and the second segment bolt joint box 8 .

The rubber elastic gasket has low cost, simple construction, high efficiency, and strong water-stopping ability. There are gasket grooves in the joint surface of the shield tunnel segment. The volume of the groove is larger than the volume of the rubber elastic gasket for the rubber elastic gasket. Deformation after compression to give full play to its waterproof ability. The specific size of the gasket groove needs to be determined and designed through specific tests and calculations. The rubber elastic gasket is placed in the gasket groove in the segment and bonded strongly with waterproof glue. There are double waterproof defense lines in the joints of the tunnel segments. The waterproof form is made of superelastic material made of EPDM rubber, which has good durability. The rubber elastic gasket is connected with the second waterproof device through lap joints. A sealed waterproof device is formed around the joint box to resist a certain water pressure.

A distance of at least 50 mm should be set between the inner contour of the gasket groove and the outer contour of the joint box to prevent stress concentration damage to the concrete at the outer edge of the groove and joint box and the influence of segment seam misalignment.

Concrete segments are used in this example, but the utility model is not limited to this type, and may be one of concrete segments, cast iron segments or steel fiber segments.

In this example, the first rubber elastic sealing gasket 3 and the second rubber elastic sealing gasket 4 are U-shaped frames, but the utility model is not limited to this type of form, it can be a kind of square frame or polygonal frame, etc., and its implementation steps are the same as this instance.

In this example, the first waterproof unit 5 and the second waterproof unit 6 adopt two EPDM rubber elastic sealing pads to compress and waterproof, but the utility model is not limited to this type, and various single or combined waterproofing methods such as can be used The way.

The above implementation examples only illustrate the principle and effect of the present utility model, but are not intended to limit the present utility model. Anyone familiar with this technology can modify or change the above-mentioned embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or changes made by those with ordinary knowledge in the technical field without departing from the spirit and technical ideas disclosed in the utility model should still be covered by the claims of the utility model.

Claims (7)

1. a kind of two pass seam waterproof device with segment bolt connector box duct pieces of shield tunnel, to adjacent in shield tunnel The first section of jurisdiction (1) and the second section of jurisdiction (2) between joint face sealed, described the first section of jurisdiction (1) passes through bolt and Two sections of jurisdiction (2) are connected, and described the first section of jurisdiction (1) is provided with the first segment bolt connector box (7) at bolt connection, and described the Two sections of jurisdiction (2) are provided with the second segment bolt connector box (8) at bolt connection, it is characterised in that the water-tight device includes setting On joint face first of waterproof unit (5) of outer arc surface side, on joint face the second waterproof unit (6) of inner arc surface side and It is arranged on around the first segment bolt connector box (7) and the second segment bolt connector box (8) and is taken with second waterproof unit (6) Connect and carry out sealed connector box waterproof unit jointly.

2. a kind of two pass seam waterproof device with segment bolt connector box duct pieces of shield tunnel according to claim 1, Characterized in that, described the first section of jurisdiction (1) and the second section of jurisdiction (2) is equipped with waterproof unit groove on joint face, it is described First waterproof unit (5), second waterproof unit (6) and connector box waterproof unit are bonded in waterproof unit groove.

3. a kind of two pass seam waterproof device with segment bolt connector box duct pieces of shield tunnel according to claim 2, Characterized in that, described connector box waterproof unit includes the first rubber being arranged in the first section of jurisdiction (1) waterproof unit groove Elastic sealing gasket (3) and the second caoutchouc elasticity sealing gasket (4) being arranged in the second section of jurisdiction (2) waterproof unit groove, it is described The first caoutchouc elasticity sealing gasket (3) and second caoutchouc elasticity sealing gasket (4) position just to sealing.

4. a kind of two pass seam waterproof device with segment bolt connector box duct pieces of shield tunnel according to claim 3, Characterized in that, described first of waterproof unit (5), second waterproof unit (6), the first caoutchouc elasticity sealing gasket (3) and Second caoutchouc elasticity sealing gasket (4) is ethylene propylene diene rubber elastic sealing gasket, product type hydro-expansive rubber sealing cushion or polyethers Type polyurethane water-swellable elastic sealing gasket.

5. a kind of two pass seam waterproof device with segment bolt connector box duct pieces of shield tunnel according to claim 3, Characterized in that, the first caoutchouc elasticity sealing gasket (3) and the second caoutchouc elasticity sealing gasket (4) on joint face close to intrados One side opening, its side that is open forms square frame-shaped or polygon hermetic water-proof structure with second waterproof unit (6) overlap joint.

6. a kind of two pass seam waterproof device with segment bolt connector box duct pieces of shield tunnel according to claim 1, Characterized in that, the Internal periphery of connector box waterproof unit and the distance between the outline of connector box are not less than 50mm.

7. a kind of two pass seam waterproof device with segment bolt connector box duct pieces of shield tunnel according to claim 1, Characterized in that, described the first section of jurisdiction (1) and the second section of jurisdiction (2) are concrete pipe sheet, cast-iron segment or steel fibre section of jurisdiction.