CN209908535U - Waterproof elastic sealing gasket for shield tunnel segment joint - Google Patents
Waterproof elastic sealing gasket for shield tunnel segment joint Download PDFInfo
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- CN209908535U CN209908535U CN201920759511.XU CN201920759511U CN209908535U CN 209908535 U CN209908535 U CN 209908535U CN 201920759511 U CN201920759511 U CN 201920759511U CN 209908535 U CN209908535 U CN 209908535U
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Abstract
The utility model discloses a shield tunnel section of jurisdiction seam waterproof elastic sealing pad, sealed pad sets up along its vertical central line bilateral symmetry, sealed pad includes recess and through-hole subassembly, the recess sets up the lower tip at sealed pad, the through-hole subassembly is located the top of recess, through-hole subassembly top-down includes first row of through-hole in proper order, second row of through-hole and third row of through-hole, sealed pad is last, lower terminal surface is parallel, first row of through-hole, the pass of second row of through-hole and third row of through-hole is triangle-shaped, and triangle-shaped's three angle is the fillet, first row of through-hole, the base of second row of through-hole and third row of through-hole all with sealed up end parallel arrangement, the apex angle of first row of through-hole and second row of through-hole sets up down. The utility model provides a shield tunnel seals up section form suitable for under high water pressure, the big buried depth environment, under the condition of the same compressive capacity, the contact stress between the sealed pad of triangle-shaped pass is bigger, and waterproof performance is better.
Description
Technical Field
The utility model relates to a shield tunnel engineering technical field especially relates to a shield tunnel section of jurisdiction seam waterproof elastic sealing pad.
Background
Shield tunnels for deep drainage, crossing the river, crossing the sea and the like have high requirements on preventing water leakage of the shield tunnels, wherein the waterproof of segment joints is the key part. At present, the waterproof sealing gasket material for the shield tunnel segment joint in China adopts Ethylene Propylene Diene Monomer (EPDM), and also has a small part of water-swellable rubber and composite rubber consisting of the two. In the engineering, the elastic sealing gasket is adhered in a groove prefabricated by the duct piece, the elastic sealing gasket adhered to the two duct pieces respectively by extrusion when the duct pieces are assembled obtains a waterproof function, but because deep drainage, cross-river, cross-sea shield tunnels and the like have higher requirements on the waterproof capacity of the elastic sealing gasket, in order to achieve certain waterproof capacity, the elastic sealing gasket can be thicker and larger, the assembling force required by the preset opening amount of the elastic sealing gasket is overlarge by the extrusion sealing gasket, and the joint end part (concrete outside the groove of the sealing gasket) of the duct piece can be damaged.
The circular hole is the most commonly used hole type of the sealing gasket, the stress change is relatively even when the circular hole is stressed and compressed, the stability is good, and the sealing gasket is mostly suitable for domestic subway tunnels and partial large-scale river crossing or river crossing tunnels, but the sealing gasket is not suitable for shield tunnels with large buried depth, high water pressure and large diameter, particularly submarine tunnels, and general subway tunnel segment seam waterproof sealing gaskets are not suitable. Therefore, a novel section form of the elastic sealing gasket is needed to be provided, so that the waterproof requirement of the shield tunnel segment joint under high water pressure can be met, and meanwhile, the assembling force can be guaranteed to meet the construction and design requirements.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a shield tunnel section of jurisdiction seam water proof test device just in order to solve above-mentioned problem.
In order to achieve the purpose, the invention provides a waterproof elastic sealing gasket for a shield tunnel segment joint, which is used for sealing the joint of two adjacent tunnel segments, the lower end of the sealing gasket is arranged in a mounting groove of the tunnel segments, the sealing gasket comprises a groove and a through hole assembly, the groove is in a U shape, a plurality of grooves are spaced at the lower end part of the sealing gasket, the through hole assembly is arranged on the sealing gasket and positioned above the groove, the sealing gasket is arranged along the vertical central line thereof in a bilateral symmetry manner, the through hole assembly sequentially comprises a first row of through holes, a second row of through holes and a third row of through holes from top to bottom, the upper end surface and the lower end surface of the sealing gasket are parallel, the hole patterns of the first row of through holes, the second row of through holes and the third row of through holes are all triangles, three corners of the triangles are all round corners, the bottom edges of the, the vertex angle of the first row of through holes and the second row of through holes is arranged downwards, the vertex angle of the third row of through holes is arranged upwards, the first row of through holes and the second row of through holes are arranged at intervals, and the second row of through holes and the third row of through holes are arranged at intervals.
The beneficial effects of the utility model reside in that:
1. the utility model provides a shield tunnel sealing gasket section form suitable for under high water pressure, the big buried depth environment. The hole pattern on the cross section is triangular, compared with a circular shape and a drop shape, the triangular hole pattern has higher stability, and larger compression stress is needed for compressing the triangular hole pattern, so that the rigidity of the triangular hole pattern sealing gasket is larger compared with the circular shape and the drop shape sealing gasket, under the condition of the same opening amount of the sealing gasket, the contact stress between the triangular hole pattern sealing gasket is larger, and the waterproof performance of the sealing gasket is better;
2. the utility model discloses sealed pad is provided with three rows of through-holes, and its highly more general sealed pad will be high, and under the same section of jurisdiction seam volume of opening condition, this sealed pad volume of compression is great, and its waterproof performance increases.
Drawings
The accompanying drawings, which are included to provide a further understanding of the disclosure and are incorporated in and constitute a part of this specification, illustrate embodiments of the disclosure and together with the description serve to explain the disclosure without limiting the disclosure. In the drawings:
fig. 1 is a schematic sectional view of a waterproof elastic sealing gasket for a shield tunnel segment seam according to the present invention;
fig. 2 is a schematic cross-sectional view of a waterproof elastic gasket according to an embodiment of the present invention.
Description of the reference numerals
1-first type through holes, 2-second row of through holes, 3-third row of through holes, 4-grooves and 5-second type through holes.
Detailed Description
The following detailed description of specific embodiments of the present disclosure is provided in connection with the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating the present disclosure, are given by way of illustration and explanation only, not limitation.
In the present disclosure, unless otherwise specified, the terms of orientation such as "upper" and "lower" are generally defined based on the orientation or positional relationship shown in the drawings, and specifically refer to the direction of the drawing shown in fig. 1 in combination with the positional relationship of the corresponding parts in other drawings. Furthermore, the terms "first," "second," and the like, as used in this disclosure, are intended to distinguish one element from another, and not necessarily for order or importance. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated.
As shown in fig. 1, the utility model relates to a shield tunnel section of jurisdiction seam waterproof elastic sealing pad for the sealed of two adjacent tunnel section of jurisdiction seams department, sealed pad sets up along its vertical central line bilateral symmetry, and sealed up end is sealed pad contact surface, and the lower terminal surface is the section of jurisdiction contact surface, and sealed lower extreme setting of filling up is in the mounting groove of tunnel section of jurisdiction, and sealed upper and lower terminal surface parallel of filling up. The sealing gasket is made of ethylene propylene diene monomer. The gasket comprises a groove 4 and a through hole assembly.
Specifically, as shown in fig. 2, the gasket upper end face length L10 is 37mm, the lower end face length L8 is 43mm, and the gasket width L9 is 28 mm. The outer contours of two side faces of the sealing gasket are folding lines, two bending points are arranged on the folding lines, the vertical distance L2 between the two bending points is 5.5mm, the vertical distance L1 between the bending point close to the upper end face and the upper end face is 11.5mm, and the vertical distance L3 between the bending point close to the lower end face and the lower end face is 11 mm.
As shown in figure 1, four grooves 4 are arranged at the lower end part of the sealing gasket at intervals, the four grooves 4 are arranged along the vertical central line of the sealing gasket in bilateral symmetry, and the arrangement of the grooves 4 at the lower end part of the sealing gasket is beneficial to reducing the compression force during the assembly of the sealing gasket.
Specifically, this utility model relates to a recess 4's both sides slightly downward sloping setting, the recess 4 of the outside of sealed lower extreme is 3mm with the horizontal distance L4 of sealed side, and the horizontal distance L6 of the adjacent limit of two recesses 4 is 3mm, and the width L5 of the bottom of recess 4 is 7 mm.
The through hole assembly is arranged on the sealing gasket and positioned above the groove 4, and the through hole assembly sequentially comprises a first row of through holes, a second row of through holes 2 and a third row of through holes 3 from top to bottom. The hole patterns of the first row of through holes, the second row of through holes 2 and the third row of through holes 3 are all triangular, and three corners of each triangle are fillets.
The first row of through-holes include two first type through-holes 1 and two second type through-holes 5, and the outside of first row of through-holes is first type through-hole 1, and two between the first type through-hole 1 be second type through-hole 5, and first type through-hole 1 forms to right angled triangle structure, and the right angle of first type through-hole 1 is located the upside. The second type through holes 5 are isosceles triangle through holes. The vertex angle of the first row of through holes is arranged downwards. The bottom edge of the first row of through holes is arranged in parallel with the upper end face of the sealing gasket.
The second row of through holes 2 comprises three holes, one less than the number of through holes of the first row. The second row of through holes 2 is arranged in parallel with the upper end face of the sealing gasket. The apex angle of the second row of through holes 2 is arranged downwards. Specifically, the second row of through holes 2 are isosceles triangle-shaped through holes, and the hole area of the hole in the middle of the second row of through holes 2 is smaller than the hole area of the holes on both sides.
The third row of through holes 3 comprises four holes, the number of through holes of the third row of through holes 3 being equal to the number of through holes of the first row of through holes. The bottom edge of the third row of through holes 3 is arranged in parallel with the upper end face of the sealing gasket. The top angle of the third row of through holes 3 is arranged upwards. Specifically, the through holes 3 in the third row are all isosceles triangle-shaped through holes. The hole areas of the two holes of the third row of through holes 3 located at the middle position are smaller than the hole areas of the holes located at the two sides.
The first row of through holes and the second row of through holes 2 are arranged at intervals, and the second row of through holes 2 and the third row of through holes 3 are arranged at intervals. The through hole area of the third row of through holes 3 is larger than the through hole areas of the first row of through holes and the second row of through holes 2. The vertex angle connecting line of the second row of through holes 2 is positioned at the lower side of the vertex angle connecting line of the third row of through holes 3.
The utility model provides a shield tunnel sealing gasket section form suitable for under high water pressure, the big buried depth environment. The hole pattern on the section is triangular, the triangle has higher stability compared with the circle and the drop, and needs larger compression stress when being compressed, so the rigidity of the triangular hole pattern sealing gasket compared with the circle and the drop is larger, the contact stress between the triangular hole pattern sealing gasket is larger under the condition of the same opening amount of the sealing gasket, and the waterproof performance of the sealing gasket is better.
The utility model discloses sealed pad is provided with three rows of through-holes, and sealed pad height will be higher than general section of jurisdiction seam waterproof gasket, and under the same section of jurisdiction seam volume of opening condition, this sealed pad volume of compression is great. For a large-diameter underwater shield tunnel, particularly under the condition of high water pressure, the opening amount of a segment joint is large. If the adopted sealing gasket is low in height and small in compression amount, the joints of the pipe pieces are opened under the action of external load, the sealing gasket is loosened, and the waterproof performance of the sealing gasket is greatly reduced.
The utility model discloses a material that adopts is Ethylene Propylene Diene Monomer (EPDM). For submarine tunnels and under the marine environment, the effect of Ethylene Propylene Diene Monomer (EPDM) with more stable property is better than that of water-swelling rubber and composite rubber. The reason is that the durability of the water-swellable rubber in a seawater environment is not clear, and in the composite sealing gasket, the water-swellable rubber and the ethylene propylene diene monomer rubber are mostly bonded by using the instant adhesive, so that the adhesive is not waterproof, and the swelling part of the instant adhesive can be separated from the main body of the EPDM sealing gasket after the instant adhesive is not waterproof when meeting water, so that the waterproof stability is poor. Therefore, Ethylene Propylene Diene Monomer (EPDM) is preferably used as the sealing gasket material in the high-water-pressure submarine tunnel.
The sealing gasket is subjected to a waterproof performance experiment in a laboratory, and water seepage occurs when the water pressure reaches 1.4MPa through testing, so that the waterproof requirements of a large buried depth, high water pressure and large-diameter underwater shield tunnel can be met.
The dynamic triaxial compression performance experiment is carried out on the sealing gasket in a laboratory, the compression stress required when the compression gap clearance reaches 0mm is 58KN/m, and the sealing gasket is constructed according to the construction experience of Shanghai subways and Chengdu subways: when the sealing gasket has a closing compression force of less than 60kN/m, the pipe pieces can be well assembled. The condition that the joint end part of the pipe piece (concrete outside the sealing gasket groove) is damaged due to overlarge assembling force can not occur.
The preferred embodiments of the present disclosure are described in detail with reference to the accompanying drawings, however, the present disclosure is not limited to the specific details of the above embodiments, and various simple modifications may be made to the technical solution of the present disclosure within the technical idea of the present disclosure, and these simple modifications all belong to the protection scope of the present disclosure.
It should be noted that, in the foregoing embodiments, various features described in the above embodiments may be combined in any suitable manner, and in order to avoid unnecessary repetition, various combinations that are possible in the present disclosure are not described again.
In addition, any combination of various embodiments of the present disclosure may be made, and the same should be considered as the disclosure of the present disclosure, as long as it does not depart from the spirit of the present disclosure.
Claims (6)
1. The utility model provides a shield tunnel section of jurisdiction seam waterproof elastic sealing pad for the sealing of two adjacent tunnel section of jurisdiction seams, the lower extreme setting of sealed pad is in the mounting groove of tunnel section of jurisdiction, and sealed pad includes recess and through-hole subassembly, and the recess forms into the U style of calligraphy, and a plurality of recess intervals are at the lower tip of sealed pad, and the through-hole subassembly sets up on the sealing pad and is located the top of recess, and sealed pad sets up its characterized in that along its vertical central line bilateral symmetry: through-hole subassembly top-down includes first row of through-hole in proper order, second row of through-hole and third row of through-hole, sealed up upper and lower terminal surface is parallel, first row of through-hole, the pass of second row of through-hole and third row of through-hole is triangle-shaped, and the three angle of triangle-shaped is the fillet, first row of through-hole, the base of second row of through-hole and third row of through-hole all sets up with sealed up end parallel arrangement, the apex angle of first row of through-hole and second row of through-hole sets up down, the apex angle of third row of through-hole sets up, first row of through-hole sets up with second row of through-hole interval.
2. The waterproof elastic sealing gasket for the joints of the shield tunnel segments as claimed in claim 1, wherein: the first row of through holes comprise first type through holes and second type through holes, the outermost side of each first row of through holes is a first type through hole, the second type through holes are formed between the two first type through holes, the first type through holes are formed into right-angled triangle structures, and the right angles of the first type through holes are located on the upper side.
3. The waterproof elastic sealing gasket for the joints of the shield tunnel segments as claimed in claim 1, wherein: the number of the through holes in the first row of through holes is n, the number of the through holes in the third row of through holes is n, and the number of the through holes in the second row is n-1.
4. The waterproof elastic sealing gasket for the joints of the shield tunnel segments as claimed in claim 1, wherein: the area of the third row of through holes is larger than that of the first row of through holes and that of the second row of through holes.
5. The waterproof elastic sealing gasket for the joints of the shield tunnel segments as claimed in claim 1, wherein: and the vertex angle connecting line of the second row of through holes is positioned at the lower side of the vertex angle connecting line of the third row of through holes.
6. The waterproof elastic sealing gasket for the joints of the shield tunnel segments as claimed in claim 1, wherein: the sealing gasket is made of ethylene propylene diene monomer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920759511.XU CN209908535U (en) | 2019-05-24 | 2019-05-24 | Waterproof elastic sealing gasket for shield tunnel segment joint |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920759511.XU CN209908535U (en) | 2019-05-24 | 2019-05-24 | Waterproof elastic sealing gasket for shield tunnel segment joint |
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| CN209908535U true CN209908535U (en) | 2020-01-07 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201920759511.XU Active CN209908535U (en) | 2019-05-24 | 2019-05-24 | Waterproof elastic sealing gasket for shield tunnel segment joint |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112708213A (en) * | 2020-12-23 | 2021-04-27 | 汕头大学 | Waterproof sealing gasket material for submarine shield tunnel |
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2019
- 2019-05-24 CN CN201920759511.XU patent/CN209908535U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112708213A (en) * | 2020-12-23 | 2021-04-27 | 汕头大学 | Waterproof sealing gasket material for submarine shield tunnel |
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