CN221032667U - Composite sealing gasket and structure for waterproof joint of socket joint shield segment - Google Patents
Composite sealing gasket and structure for waterproof joint of socket joint shield segment Download PDFInfo
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- CN221032667U CN221032667U CN202323041650.4U CN202323041650U CN221032667U CN 221032667 U CN221032667 U CN 221032667U CN 202323041650 U CN202323041650 U CN 202323041650U CN 221032667 U CN221032667 U CN 221032667U
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- sealing gasket
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- sealing
- waterproof
- composite
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- 238000007789 sealing Methods 0.000 title claims abstract description 125
- 239000002131 composite material Substances 0.000 title claims abstract description 36
- 230000006835 compression Effects 0.000 claims abstract description 16
- 238000007906 compression Methods 0.000 claims abstract description 16
- NIXOWILDQLNWCW-UHFFFAOYSA-N Acrylic acid Chemical class OC(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 claims abstract description 10
- 239000011248 coating agent Substances 0.000 claims abstract description 10
- 238000000576 coating method Methods 0.000 claims abstract description 10
- 239000000463 material Substances 0.000 claims abstract description 9
- 239000007787 solid Substances 0.000 claims abstract description 7
- 238000001125 extrusion Methods 0.000 claims description 10
- 238000004078 waterproofing Methods 0.000 claims description 9
- 229920002943 EPDM rubber Polymers 0.000 claims description 3
- 229920001084 poly(chloroprene) Polymers 0.000 claims description 3
- 150000001875 compounds Chemical class 0.000 claims 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 8
- 230000000694 effects Effects 0.000 abstract description 7
- 238000000034 method Methods 0.000 description 8
- 230000008569 process Effects 0.000 description 7
- 238000010276 construction Methods 0.000 description 6
- 238000010586 diagram Methods 0.000 description 3
- 238000013461 design Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 238000003780 insertion Methods 0.000 description 2
- 230000037431 insertion Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 230000008961 swelling Effects 0.000 description 2
- 229920001730 Moisture cure polyurethane Polymers 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229920001296 polysiloxane Polymers 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
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- Lining And Supports For Tunnels (AREA)
Abstract
The utility model belongs to the technical field of waterproof of shield tunnel, and in particular relates to a composite sealing gasket and structure for waterproof of a joint shield segment joint of a socket joint, which comprises a sealing gasket body, wherein the sealing gasket body is of a solid structure made of water-swelling materials, the sealing gasket body is provided with a mounting surface capable of being mounted on the bottom surface of a waterproof groove of a shield segment and a sealing surface capable of being matched with a sealing gasket of another shield segment to be extruded and sealed, and an organosilicon modified acrylic acid coating is arranged on the sealing surface. The composite sealing gasket adopts double sealing measures of compression sealing and water expansion sealing, so that the waterproof capacity and the durable service life of a shield segment joint adopting a socket joint are improved; and the sealing surface of the sealing gasket is provided with the organosilicon modified acrylic acid coating, so that the friction coefficient of the longitudinal joint sealing gasket during assembly is reduced, the waterproof effect is prevented from being reduced due to the fact that the sealing gasket is separated from the duct piece groove due to the overlarge friction coefficient, and the water-swelling sealing effect is not influenced.
Description
Technical Field
The utility model belongs to the technical field of waterproofing of shield tunnels, and particularly relates to a composite sealing gasket and a structure for waterproofing a socket joint shield segment joint.
Background
With the development of underground space in recent years becoming mature and diversified, various construction technologies and processes of shield tunnels are rapidly developed. Along with the construction and development of deep drainage, river crossing, sea crossing and the like, the design and construction of the shield tunnel are faced with adverse factors such as high water pressure, and the like, so that higher requirements are provided for the usability of the tunnel sealing waterproof material.
The shield tunnel waterproof comprises segment self-waterproof, seam waterproof and hand hole waterproof. The duct pieces are prefabricated in factories, the product quality is guaranteed, the impermeability is good, a large number of circumferential and longitudinal joints between the duct pieces are the weakest waterproof parts, and the method is also the most important link of waterproof design. At present, the segments of the shield tunnel are connected by bolts, the joint sealing gasket is waterproof by compression sealing, a certain opening amount and a certain staggering amount exist in the process of bolting and fixing the segments (the maximum opening of a common subway shield tunnel is 6mm, the staggering is 8mm, the maximum opening of a large-diameter shield tunnel is 8mm, the staggering is 15 mm), and the sealing gasket needs to have a larger compression amount to meet the waterproof requirement.
At present, socket joints are increasingly adopted to realize connection between duct pieces, and the socket joints are ring joints and longitudinal joint connectors adopted for automatic construction and high-precision construction on the basis of meeting the requirements of tunnel lining ring load and deformation and can meet rapid assembly. In the process of connecting and assembling the socket type quick connector segments, the opening and staggering amount between the segments is very small, the basic control is within 2mm, the long longitudinal insertion distance exists in the segment assembling process, the failure risk of the sealing gasket caused by extrusion, friction and the like is high, and the traditional sealing gasket with high compression amount is difficult to meet the assembling requirement.
Disclosure of utility model
In order to overcome the defects in the prior art, the utility model aims to provide the composite sealing gasket and the structure for the waterproof of the shield segment joint of the socket joint, so that the waterproof capacity and the durable service life of the shield segment joint of the socket joint are improved, and the failure risk of the sealing gasket caused by extrusion, friction and the like in the assembly process of the shield segment is reduced.
In order to achieve the above purpose, the technical scheme of the utility model is that the waterproof composite sealing gasket for the joint of the socket joint shield segment comprises a sealing gasket body, wherein the sealing gasket body is of a solid structure made of water-swelling materials, the sealing gasket body is provided with a mounting surface capable of being mounted on the bottom surface of a waterproof groove of the shield segment and a sealing surface capable of being matched with the sealing gasket of another shield segment to be extruded and sealed, and an organosilicon modified acrylic acid coating is arranged on the sealing surface.
In one embodiment, the compression amount of the composite gasket is 1 to 2mm.
As one embodiment, the cross section of the sealing gasket body is trapezoid, and the size of the sealing surface is smaller than that of the mounting surface.
As one embodiment, the gasket body has a carcass layer embedded therein.
As one of the implementation modes, a groove is formed in the mounting surface, and the framework layer is embedded into the groove.
As one embodiment, the groove extends along a length direction of the gasket body.
As one of the implementation modes, the skeleton layer is an ethylene propylene diene monomer layer or a chloroprene rubber layer.
The utility model also provides a waterproof structure for the joint of the socket joint shield segment, which comprises two shield segments, wherein the two shield segments are spliced by the socket joint, waterproof grooves of the two shield segments are oppositely arranged and are provided with the composite sealing gasket, and sealing surfaces of the composite sealing gasket in the waterproof grooves of the two shield segments are mutually extruded and sealed.
Compared with the prior art, the utility model has the beneficial effects that:
(1) The composite sealing gasket is mainly composed of a solid sealing gasket body made of water-swelling materials, when the duct pieces are assembled without gaps, the sealing gasket is sealed through extrusion counterforce of the sealing gasket after being in an extrusion state, when the opening amount occurs between the duct pieces, the sealing gasket contacts water, volume expansion is carried out for sealing, and by adopting double sealing measures of compression sealing and water-swelling sealing, the waterproof capacity of a shield duct piece joint adopting a socket joint is improved, and the durability is prolonged;
(2) According to the utility model, the organosilicon modified acrylic acid coating is arranged on the sealing surface of the sealing gasket body, so that the extrusion friction resistance between the sealing gaskets is effectively reduced, the installation and fixation effects of the sealing gaskets are improved when the socket joint is assembled, the waterproof performance of the sealing gaskets is improved, and the organosilicon modified acrylic acid coating does not limit the expansion of the sealing gasket body;
(3) According to the utility model, the skeleton layer is embedded in the sealing gasket body, so that the strength of the whole structure of the sealing gasket is increased, the deformation resistance of the sealing gasket is improved, and the deformation of the sealing gasket body when the shield segment slides in the longitudinal direction is reduced;
(4) The composite sealing gasket provided by the utility model has the advantages that the compression load force is extremely small, the assembly is easy, the situation that the sealing gasket corners are piled up in the pipe piece assembly process is avoided, and the waterproof effect of the sealing gasket corners and the pipe piece assembly are prevented from being influenced.
Drawings
In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the utility model, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic structural diagram of a composite gasket for waterproofing a joint of a socket joint shield segment according to an embodiment of the present utility model;
FIG. 2 is a schematic view illustrating installation of a composite gasket according to an embodiment of the present utility model;
Fig. 3 is a schematic diagram of a shield segment under a large-opening-amount working condition according to an embodiment of the present utility model;
FIG. 4 is a schematic diagram of a water-swellable seal of a composite gasket under a large-opening-amount working condition of a shield segment provided by an embodiment of the utility model;
In the figure: 1. a gasket body; 2. a framework layer; 3. a silicone modified acrylic coating; 4. shield segments; 5. waterproof grooves.
Detailed Description
The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
In the description of the present utility model, it should be understood that the terms "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate orientations or positional relationships based on the orientation or positional relationships shown in the drawings, merely to facilitate describing the present utility model and simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model.
The terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first", "a second" may include one or more such features, either explicitly or implicitly; in the description of the present utility model, unless otherwise indicated, the meaning of "a plurality" is two or more.
As shown in fig. 1-4, the embodiment provides a waterproof composite sealing gasket for a joint of a socket joint shield segment, which comprises a sealing gasket body 1, wherein the sealing gasket body 1 is of a solid structure made of a water-swelling material, the sealing gasket body 1 is provided with a mounting surface capable of being mounted on the bottom surface of a waterproof groove 5 of a shield segment 4 and a sealing surface capable of being matched with a sealing gasket of another shield segment 4 to be extruded and sealed, and an organosilicon modified acrylic coating 3 is arranged on the sealing surface.
The composite sealing gasket of the embodiment adopts the solid sealing gasket body 1 made of water-swelling materials as the main part, when the duct pieces are assembled without gaps, the sealing gasket is sealed through the extrusion counterforce of the sealing gasket after being in an extrusion state, when the opening amount occurs between the duct pieces, the sealing gasket contacts water and is sealed through volume swelling, and by adopting the double sealing measures of compression sealing and water-swelling sealing, the waterproof capacity and the durable service life of the joint of the shield duct pieces adopting the socket joint are improved; and be provided with organosilicon modified acrylic acid coating 3 on sealed face of sealed pad body 1, reduce the coefficient of friction when the sealed pad of longitudinal joint is assembled, avoid coefficient of friction too big to lead to sealed pad to deviate from the section of jurisdiction slot, cause the water-proof effects to descend, and organosilicon modified acrylic acid coating 3 can not restrict the inflation of sealed pad body 1.
The sealing gasket body 1 is of a solid structure made of water-swelling materials, has smaller compression quantity, and can avoid the influence on the waterproof effect and segment assembly caused by deformation of shield segments assembled by socket joints during longitudinal insertion; the water-swelling material can adopt polyurethane prepolymer, so that the overall structural strength of the sealing gasket body 1 is increased, the mass loss rate can be controlled at a level less than or equal to 2%, the durability of the sealing gasket body 1 is greatly improved, and the water-swelling multiplying power is basically kept constant for a long time.
The compression amount of the composite sealing gasket is 1-2mm by optimizing the embodiment.
The compression load force of the composite sealing gasket is smaller, the compression load force can be controlled to be 15-30 KN/m and is far smaller than that of a conventional sealing gasket by more than 50KN/m, the compression deformation generated when the composite sealing gasket is subjected to compression load is smaller, the composite sealing gasket has better sealing performance, and the assembling requirement of a pin type socket joint is met.
Further, the cross section of the gasket body 1 is trapezoidal, and the size of the sealing surface is smaller than that of the mounting surface. As shown in fig. 1-2, the cross section of the sealing gasket body 1 adopts a trapezoid structure, so that the contact area of the sealing surfaces of the two sealing gasket bodies 1 can be reduced, and the assembling stress of the sealing gasket is reduced better.
Optimizing the above embodiment, the gasket body 1 is embedded with the skeleton layer 2. According to the embodiment, the skeleton layer 2 is embedded into the sealing gasket body 1, so that the strength of the whole sealing gasket structure is improved, the deformation resistance of the whole sealing gasket is improved, the deformation of the sealing gasket body 1 when the shield segment slides longitudinally is reduced, and the sealing gasket corner is prevented from being accumulated to affect the sealing gasket corner waterproof and segment assembly.
In some implementations, a groove is provided on the mounting surface, and the carcass layer 2 is embedded in the groove. Specifically, the cross-sectional shape of the skeleton layer 2 is matched with the cross-sectional shape of the groove, and the size of the skeleton layer 2 is matched with the size of the groove. Further, the number of the grooves is one and the grooves extend along the length direction of the gasket body 1, and the grooves may be plural and spaced apart.
Preferably, the skeleton layer 2 is an ethylene propylene diene monomer layer or a neoprene layer, has higher strength, and can increase the strength of the whole structure of the sealing gasket. The skeleton layer 2 can be vulcanized synchronously with the sealing gasket body 1 and formed at one time, and can be fixed in the groove in a sticking mode.
The embodiment also provides a waterproof structure for a socket joint type joint shield segment joint, which comprises two shield segments 4, wherein the two shield segments 4 are spliced through a socket joint, waterproof grooves 5 of the two shield segments 4 are oppositely arranged and are provided with the composite sealing gasket according to any one of the above, and sealing surfaces of the composite sealing gasket in the waterproof grooves 5 of the two shield segments 4 are mutually extruded and sealed, as shown in fig. 2-4.
The composite sealing gasket of the embodiment adopts double waterproof measures of compression sealing and water expansion sealing, generates internal stress after the composite sealing gasket is in an extrusion state, and achieves a waterproof effect through extrusion counterforce of the sealing gasket body 1; when the composite sealing gasket contacts water, the water-swelling part in the composite sealing gasket swells in volume when contacting water, thereby playing a role in dual waterproof.
Along with the change of the opening gap of the duct piece in the tunnel construction or operation process, the water-swelling part can automatically fill the changed duct piece gap according to the characteristic of water swelling, and the applicability is strong.
The foregoing description of the preferred embodiments of the utility model is not intended to be limiting, but rather is intended to cover all modifications, equivalents, alternatives, and improvements that fall within the spirit and scope of the utility model.
Claims (8)
1. A waterproof compound sealing gasket of socket joint shield constructs section of jurisdiction seam which characterized in that: the waterproof sealing gasket comprises a sealing gasket body, wherein the sealing gasket body is of a solid structure made of a water-swelling material, the sealing gasket body is provided with a mounting surface capable of being mounted on the bottom surface of a waterproof groove of a shield segment and a sealing surface capable of being matched with a sealing gasket of another shield segment in an extrusion sealing mode, and an organosilicon modified acrylic acid coating is arranged on the sealing surface.
2. The composite gasket for waterproofing a joint of a socket joint shield segment joint of claim 1, wherein: the compression amount of the composite sealing gasket is 1-2 mm.
3. The composite gasket for waterproofing a joint of a socket joint shield segment joint of claim 2, wherein: the cross section of the sealing gasket body is trapezoid, and the size of the sealing surface is smaller than that of the mounting surface.
4. The composite gasket for waterproofing a joint of a socket joint shield segment joint of claim 1, wherein: the sealing gasket body is embedded with a framework layer.
5. The composite gasket for waterproofing a joint of a socket joint shield segment joint of claim 4, wherein: the mounting surface is provided with a groove, and the framework layer is embedded into the groove.
6. The composite gasket for waterproofing a joint of a socket joint shield segment joint of claim 5, wherein: the groove extends along the length direction of the sealing gasket body.
7. The composite gasket for waterproofing a joint of a socket joint shield segment joint of claim 4, wherein: the skeleton layer is an ethylene propylene diene monomer layer or a chloroprene rubber layer.
8. A be used for socket joint formula to connect shield and construct waterproof structure of section of jurisdiction seam, constructs section of jurisdiction, its characterized in that including two: the two shield segments are spliced through the socket joint, the waterproof grooves of the two shield segments are arranged oppositely and are provided with the composite sealing gasket according to any one of claims 1-7, and the sealing surfaces of the composite sealing gasket in the waterproof grooves of the two shield segments are mutually extruded and sealed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202323041650.4U CN221032667U (en) | 2023-11-10 | 2023-11-10 | Composite sealing gasket and structure for waterproof joint of socket joint shield segment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202323041650.4U CN221032667U (en) | 2023-11-10 | 2023-11-10 | Composite sealing gasket and structure for waterproof joint of socket joint shield segment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN221032667U true CN221032667U (en) | 2024-05-28 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202323041650.4U Active CN221032667U (en) | 2023-11-10 | 2023-11-10 | Composite sealing gasket and structure for waterproof joint of socket joint shield segment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN221032667U (en) |
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2023
- 2023-11-10 CN CN202323041650.4U patent/CN221032667U/en active Active
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