CN110284909B - A friction-reducing pipe segment waterproof sealing pad and shield pipe segment waterproof structure - Google Patents

A friction-reducing pipe segment waterproof sealing pad and shield pipe segment waterproof structure Download PDF

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Publication number
CN110284909B
CN110284909B CN201910699173.XA CN201910699173A CN110284909B CN 110284909 B CN110284909 B CN 110284909B CN 201910699173 A CN201910699173 A CN 201910699173A CN 110284909 B CN110284909 B CN 110284909B
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China
Prior art keywords
sealing gasket
waterproof
friction
segment
shield
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CN110284909A (en
Inventor
谢俊
孙文昊
郭磊
段伟
王春梅
王均勇
李姣阳
徐晨
王少锋
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China Railway Siyuan Survey and Design Group Co Ltd
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China Railway Siyuan Survey and Design Group Co Ltd
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Priority to CN201910699173.XA priority Critical patent/CN110284909B/en
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    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
    • E21D11/04—Lining with building materials
    • E21D11/08—Lining with building materials with preformed concrete slabs
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
    • E21D11/38—Waterproofing; Heat insulating; Soundproofing; Electric insulating
    • E21D11/385—Sealing means positioned between adjacent lining members

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  • Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Mining & Mineral Resources (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Geology (AREA)
  • Lining And Supports For Tunnels (AREA)

Abstract

The invention belongs to the technical field of civil engineering, and particularly relates to an antifriction duct piece waterproof sealing gasket. The invention also provides a shield segment waterproof structure, wherein sealing gaskets are arranged in the two waterproof grooves, and at least one sealing gasket is the antifriction segment waterproof sealing gasket; the antifriction material layer on the shield segment provided with the antifriction segment waterproof sealing gasket and the extrusion end of the sealing gasket on the other shield segment are mutually extruded and sealed. According to the invention, the friction coefficient between the contact surfaces of the waterproof sealing gaskets of the duct pieces is effectively reduced by arranging the antifriction material layer on the surface of the waterproof sealing gaskets of the existing duct pieces, which is away from the surface attached to the bottom surface of the waterproof groove, so that the dislocation phenomenon is effectively relieved, and the waterproof capability of the formed shield tunnel is remarkably improved; the duct piece waterproof sealing gasket can be matched with a common sealing gasket or an antifriction sealing gasket.

Description

Antifriction duct piece waterproof sealing pad and shield duct piece waterproof structure
Technical Field
The invention belongs to the technical field of civil engineering, and particularly relates to an antifriction duct piece waterproof sealing gasket and a shield duct piece waterproof structure.
Background
At present, ethylene propylene diene monomer rubber or neoprene rubber is generally used for the waterproof elastic sealing gasket of the shield segment structure. In the pipe piece assembling process, under the action of the rotating torque of the pipe piece assembling machine, the sealing gasket of the pipe piece longitudinal joint is compacted, the pipe piece structure longitudinally slides to be in place under the action of jack thrust, and then the pipe piece is locked by adopting a connecting bolt, so that the pipe piece assembling is completed. In the assembling process, great friction exists between the contact surfaces of the sealed gaskets of the extruded longitudinal seams, the gaskets of the assembled duct pieces can displace in opposite directions to the tunneling direction of the shield under the action of the friction, and the gaskets of the assembled duct pieces can displace in accordance with the tunneling direction of the shield under the action of the friction, so that the sealed gaskets of the longitudinal seams at the corners of the duct pieces are generally staggered in the assembling process, the phenomenon can not be completely eliminated even in a mode of brushing drag reducer, the waterproof capability of the duct piece structure is weakened, and even corner water leakage occurs, and the durability and the normal service performance of the shield tunnel are influenced.
Disclosure of Invention
In order to overcome the defects in the prior art, the invention aims to provide the antifriction pipe segment waterproof sealing gasket and the shield pipe segment waterproof structure, which can reduce the friction force of the contact surface of the pipe segment waterproof sealing gasket, thereby effectively relieving the dislocation phenomenon and remarkably improving the waterproof capacity of a formed shield tunnel.
In order to achieve the above purpose, the technical scheme of the invention is that the antifriction duct piece waterproof sealing gasket comprises a sealing gasket body, wherein the sealing gasket body is provided with a mounting end which can extend into a waterproof groove of a shield duct piece and an extrusion end which can be matched with the sealing gasket of another shield duct piece for extrusion, and the end face of the extrusion end of the sealing gasket body is provided with an antifriction material layer.
Further, the thickness of the antifriction material layer is 0.1-1 mm.
Further, the friction reducing material layer is a sheet made of polytetrafluoroethylene or a material having a small friction coefficient similar to polytetrafluoroethylene.
Further, the antifriction material layer and the sealing gasket body are vulcanized synchronously and molded at one time, or the antifriction material layer is adhered to the surface of the sealing gasket body.
Further, the mounting end of the sealing gasket body is provided with a groove with an opening facing away from the extrusion end.
Still further, be equipped with a plurality of through-holes in the sealing pad body, the through-hole is followed the length direction of sealing pad body arranges, just the through-hole is located antifriction material layer with between the recess.
Further, the through hole comprises a plurality of first holes and a plurality of second holes, and the second holes are arranged above the adjacent two first holes.
Further, a third hole is arranged above the outer sides of the first holes on both sides.
The invention also provides a shield segment waterproof structure, which comprises two shield segments, wherein waterproof grooves of the two shield segments are oppositely arranged; sealing gaskets are arranged in each waterproof groove, and at least one sealing gasket is the antifriction duct piece waterproof sealing gasket; and the antifriction material layer of the sealing gasket body on the shield segment provided with the antifriction segment waterproof sealing gasket is mutually extruded and sealed with the extrusion end of the sealing gasket on the other shield segment.
Compared with the prior art, the invention has the beneficial effects that:
(1) According to the invention, the antifriction material layer is arranged on the end face of the extrusion end of the sealing gasket body, which is used for being matched and extruded with the sealing gasket of another shield segment, so that the friction coefficient between the contact surfaces of the waterproof sealing gaskets of the segment is effectively reduced, the dislocation phenomenon is effectively relieved, and the waterproof capacity of the formed shield tunnel is remarkably improved;
(2) According to the invention, the sealing gasket is reduced from being dislocated in the assembling process by pasting or synchronously vulcanizing polytetrafluoroethylene or a material with a small friction coefficient similar to polytetrafluoroethylene on the existing duct piece waterproof sealing gasket;
(3) The segment waterproof sealing gasket provided by the invention can be matched with a common sealing gasket or an antifriction sealing gasket for use.
Drawings
In order to more clearly illustrate the embodiments of the invention 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 invention, 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 cross-sectional view of a conventional waterproof gasket;
FIG. 2 is a cross-sectional view of a friction reducing segment waterproof gasket provided in an embodiment of the present invention;
FIG. 3 is a cross-sectional view of a friction reducing segment waterproof gasket provided by an embodiment of the present invention in use in combination;
in the figure: 1. the sealing gasket comprises a sealing gasket body 2, an antifriction material layer 3, grooves 4, a first hole 5, a second hole 6 and a third hole.
Detailed Description
The following description of the embodiments of the present invention 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 invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
In the description of the present invention, 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 invention 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 invention.
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 invention, unless otherwise indicated, the meaning of "a plurality" is two or more.
As shown in fig. 2, the embodiment of the invention provides an antifriction duct piece waterproof sealing gasket, which comprises a sealing gasket body 1, wherein the sealing gasket body 1 is provided with a mounting end which can extend into a waterproof groove of a shield duct piece and an extrusion end which can be matched with a sealing gasket of another shield duct piece for extrusion, and the end face of the extrusion end of the sealing gasket body 1 is provided with an antifriction material layer 2. According to the invention, the antifriction material layer 2 is arranged on the extrusion end face of the extrusion end of the sealing gasket body 1, which is used for being matched with the sealing gasket of another shield segment for extrusion, so that the friction coefficient between the contact surfaces of the waterproof sealing gaskets of the segment is effectively reduced, the dislocation phenomenon is effectively relieved, and the waterproof capability of the formed shield tunnel is remarkably improved.
Further, the thickness of the antifriction material layer 2 is 0.1-1 mm. The invention reduces the friction coefficient and ensures other service performances of the sealing gasket body 1 through the proper thickness of the antifriction material layer 2. Further, the antifriction material layer 2 of the present embodiment may be a sheet made of polytetrafluoroethylene, or may be a sheet made of a polymer material having the same or similar coefficient of friction as the polytetrafluoroethylene sheet. In this embodiment, the antifriction material layer 2 may be fixed on the extrusion end surface of the extrusion end of the sealing pad body 1, which is used to match and extrude with the sealing pad of another shield segment, preferably, the antifriction material layer 2 and the sealing pad body 1 are vulcanized synchronously and formed in one step, or the antifriction material layer 2 is adhered to the surface of the sealing pad body 1, so as to reduce the friction force between the segment waterproof sealing pad and the segment waterproof sealing pad, and facilitate the sliding of the segment structure in place along the longitudinal direction, and avoid the occurrence of dislocation of the sealing pad body 1 in the assembling process.
Further, the mounting end of the gasket body 1 is provided with a groove 3 with an opening facing away from the extrusion end. The connecting line of the middle points of the upper side and the lower side of the cross section of the sealing gasket body 1 in this embodiment is the symmetry axis of the sealing gasket body 1, and a plurality of grooves 3 are symmetrically distributed on two sides of the symmetry axis, as shown in fig. 2, four U-shaped grooves 3 with openings facing the shield segment are arranged on one side of the sealing gasket body 1, which is attached to the bottom surface of the waterproof groove, and two grooves 3 are arranged on each side of the symmetry axis.
Further, a plurality of through holes are arranged in the sealing gasket body 1, the through holes are arranged at intervals along the length direction of the sealing gasket body 1, and the through holes are positioned between the antifriction material layer 2 and the groove 3; the plurality of through holes of the present embodiment are symmetrical with respect to the symmetry axis. Further, the through hole comprises a plurality of first holes 4 and a plurality of second holes 5, and the second holes 5 are arranged above the adjacent two first holes 4; and a third hole 6 is arranged above the outer sides of the first holes 4 on two sides. As shown in fig. 2, three first holes 4, two second holes 5 and two third holes 6 are provided in the gasket body 1 of the present embodiment, the two second holes 5 are respectively located above the first holes 4 in the middle and the first holes 4 on both sides thereof, the first holes 4 in the middle are symmetrical about the symmetry axis, and the third holes 6 are located outside the first holes 4 on both sides.
Further, the cross section of the first hole 4 is triangular, and the cross section of the second hole 5 is inverted triangular. As shown in fig. 2, the first holes 4 and the second holes 5 are the same in size, the second holes 5 are located right above between two adjacent first holes 4, and the bottoms of the second holes 5 are inserted between the two first holes 4. The cross section of the third hole 6 in this embodiment is irregularly elliptical, and the size of the third hole 6 is smaller than the first hole 4 and the second hole 5, as shown in fig. 2.
The reinforced material can be additionally arranged in the sealing gasket body 1 of the duct piece waterproof sealing gasket, so that the deformation resistance of the sealing gasket under the action of friction force is improved, the deformation of the sealing gasket under the action of friction force of a contact surface is effectively reduced, the dislocation phenomenon is further relieved, and the waterproof capacity of a formed shield tunnel is remarkably improved. The reinforced material is a high elastic modulus material; the reinforcement material in this embodiment may be steel bars, nylon ropes or other high modulus materials. Preferably, the reinforcement material is disposed inside the inside of the extrusion end of the reinforcement material gasket body 1, reducing deformation of the gasket body when the segment structure slides. The reinforced material comprises a plurality of longitudinal ribs arranged along the length direction of the reinforced material sealing gasket body 1, the longitudinal ribs are arranged at intervals, and the number of the specific longitudinal ribs is set according to actual needs. The longitudinal ribs arranged in the sealing gasket body along the length direction of the sealing gasket body are consistent with the sliding direction of the duct piece structure, the deformation reinforcing rib material for reducing the sealing gasket body can also comprise a plurality of transverse ribs arranged at intervals along the length direction of the reinforcing rib material sealing gasket body 1, the plurality of transverse ribs are connected with the plurality of longitudinal ribs to form a net structure, and the integral deformation resistance is improved.
The invention also provides a shield segment waterproof structure, which comprises two shield segments, wherein waterproof grooves of the two shield segments are oppositely arranged; sealing gaskets are arranged in each waterproof groove, and at least one sealing gasket is the antifriction duct piece waterproof sealing gasket; and the antifriction material layer 2 of the sealing gasket body 1 on the shield segment provided with the antifriction segment waterproof sealing gasket is mutually extruded and sealed with the extrusion end of the sealing gasket on the other shield segment. As shown in FIG. 3, in this embodiment, by adhering or synchronously vulcanizing polytetrafluoroethylene (or other materials capable of effectively reducing friction coefficient between rubbers) sheets on the existing sealing gasket, the friction coefficient between contact surfaces of the sealing gasket is effectively reduced, and the segment waterproof sealing gasket of this embodiment can be used in combination with a common sealing gasket or the antifriction segment waterproof sealing gasket provided in this embodiment, so as to effectively alleviate the dislocation phenomenon and remarkably improve the waterproof capability of the formed shield tunnel.
The foregoing description of the preferred embodiments of the invention 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 invention.

Claims (4)

1.一种减摩的管片防水密封垫，包括密封垫本体，所述密封垫本体具有可伸入盾构管片的防水沟槽内的安装端以及可与另一盾构管片的密封垫配合挤压的挤压端，其特征在于：所述密封垫本体挤压端的端面设有减摩材料层；所述减摩材料层的厚度为0.1-1㎜；所述密封垫本体内还设有加筋材料；所述减摩材料层是由聚四氟乙烯制成的薄片；加筋材料包括沿密封垫本体的长度方向设置的多根纵筋，多根纵筋间隔设置；沿密封垫本体的长度方向设置的纵筋与管片结构的滑移方向一致；加筋材料还包括沿密封垫本体的长度方向间隔设置的多根横筋，多根横筋与多根纵筋连接形成网状结构；所述密封垫本体的安装端设有开口背向挤压端的凹槽；所述密封垫本体内设有多个通孔，所述通孔沿所述密封垫本体的长度方向布置，且所述通孔位于所述减摩材料层与所述凹槽之间；所述通孔包括若干第一孔和若干第二孔，相邻两个第一孔之间的上方设有第二孔；所述第一孔呈三角形，所述第二孔呈倒三角形。1. A friction-reducing pipe segment waterproof sealing gasket, comprising a sealing gasket body, wherein the sealing gasket body has a mounting end that can be inserted into a waterproof groove of a shield pipe segment and an extrusion end that can be extruded in cooperation with a sealing gasket of another shield pipe segment, characterized in that: an end surface of the extrusion end of the sealing gasket body is provided with a friction-reducing material layer; the thickness of the friction-reducing material layer is 0.1-1 mm; a reinforcing material is also provided in the sealing gasket body; the friction-reducing material layer is a thin sheet made of polytetrafluoroethylene; the reinforcing material comprises a plurality of longitudinal ribs arranged along the length direction of the sealing gasket body, and the plurality of longitudinal ribs are arranged at intervals; and a plurality of longitudinal ribs are arranged along the length direction of the sealing gasket body. The longitudinal reinforcement is consistent with the sliding direction of the pipe segment structure; the reinforcement material also includes a plurality of transverse reinforcements arranged at intervals along the length direction of the gasket body, and the plurality of transverse reinforcements are connected with the plurality of longitudinal reinforcements to form a mesh structure; the mounting end of the gasket body is provided with a groove with an opening facing away from the extrusion end; a plurality of through holes are provided in the gasket body, the through holes are arranged along the length direction of the gasket body, and the through holes are located between the friction-reducing material layer and the groove; the through holes include a plurality of first holes and a plurality of second holes, and a second hole is provided above two adjacent first holes; the first hole is triangular, and the second hole is inverted triangular. 2.如权利要求1所述的一种减摩的管片防水密封垫，其特征在于：所述减摩材料层与所述密封垫本体同步硫化、一次成型，或者所述减摩材料层粘贴于所述密封垫本体的表面。2. A friction-reducing pipe segment waterproof sealing gasket as described in claim 1, characterized in that: the friction-reducing material layer and the sealing gasket body are synchronously vulcanized and formed in one step, or the friction-reducing material layer is adhered to the surface of the sealing gasket body. 3.如权利要求1所述的一种减摩的管片防水密封垫，其特征在于：位于两边的所述第一孔的外侧的上方均设有第三孔。3. A friction-reducing pipe segment waterproof sealing gasket as described in claim 1, characterized in that a third hole is provided above the outer side of the first hole on both sides. 4.一种盾构管片防水结构，其特征在于：包括两片盾构管片，两片盾构管片的防水沟槽相对设置；各所述防水沟槽内均安装有密封垫，且至少有一个密封垫为如权利要求1-3任一项所述的减摩的管片防水密封垫；安装有所述减摩的管片防水密封垫的盾构管片上的密封垫本体的减摩材料层与另一盾构管片上的密封垫的挤压端相互挤压密封。4. A shield segment waterproof structure, characterized in that: it comprises two shield segments, and the waterproof grooves of the two shield segments are arranged opposite to each other; a sealing gasket is installed in each of the waterproof grooves, and at least one sealing gasket is a friction-reducing segment waterproof sealing gasket as described in any one of claims 1 to 3; the friction-reducing material layer of the sealing gasket body on the shield segment installed with the friction-reducing segment waterproof sealing gasket and the extrusion end of the sealing gasket on the other shield segment are extruded and sealed against each other.
CN201910699173.XA 2019-07-31 2019-07-31 A friction-reducing pipe segment waterproof sealing pad and shield pipe segment waterproof structure Active CN110284909B (en)

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CN111677527B (en) * 2020-06-30 2024-11-05 中冶天工集团有限公司 A composite lining segment sealing groove

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