CN215332885U - Shield tunnel pipe circumferential weld seal structure - Google Patents
Shield tunnel pipe circumferential weld seal structure Download PDFInfo
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- CN215332885U CN215332885U CN202121766159.6U CN202121766159U CN215332885U CN 215332885 U CN215332885 U CN 215332885U CN 202121766159 U CN202121766159 U CN 202121766159U CN 215332885 U CN215332885 U CN 215332885U
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Abstract
The utility model discloses a sealing structure for a pipe ring joint of a shield tunnel, which is arranged at the joint between a first pipe ring and a second pipe ring; the sealing structure comprises a first sealing gasket and a second sealing gasket which are arranged between pipe ring joints, and the cross sections of the first sealing gasket and the second sealing gasket are of inverted L-shaped structures; the utility model forms a vertical waterproof layer by arranging two inverted L-shaped sealing gaskets at the joint of the pipe ring and extending the sealing vertical sections of the two sealing gaskets into the joint of the pipe ring; the sealing horizontal sections of the two sealing gaskets are vertically arranged at the exposed ends of the sealing vertical sections and are fixedly sealed together to form a horizontal waterproof layer which is vertical to the joint between the pipe rings, so that the waterproof pipe has multiple waterproof capabilities, realizes multi-dimensional waterproof, has higher integral deformation capability, effectively avoids damage caused by dislocation of the joint between the pipe rings or horizontal tensioning, and has higher waterproof capability.
Description
Technical Field
The utility model belongs to the technical field of shield tunnel engineering, and particularly relates to a sealing structure for an annular joint of a shield tunnel pipe.
Background
At present, the construction of subway tunnels generally adopts shield construction, shield tunnel segments are main assembly components of the shield construction, after pipe rings are formed, circular seams formed between the pipe rings are the weakest waterproof link, and in order to prevent the leakage of the circular seams caused by the water level outside the shield tunnel segments, the circular seams between the pipe rings are generally formed by mainly adopting sealing grooves and sealing gaskets through splicing and extrusion to achieve the waterproof purpose. However, under the action of vertical dislocation, horizontal tensioning and the like of ground cracks, the joints between the shield tunnel pipe rings intersected with the ground crack sections have dislocation and tensioning phenomena, the stretched joints cause contact stress of contact surfaces between sealing gaskets to be too small, water seepage is caused, the joints subjected to dislocation cause the sealing gaskets to be separated from the sealing grooves due to too large friction, and therefore waterproof failure of the joints between the pipe rings is caused.
Therefore, the traditional rubber sealing gasket section form and the waterproof thought can not meet the engineering requirements under the ground crack site condition, and aiming at analyzing the reason of water stop failure of the inter-ring joint of the pipe, the novel waterproof sealing gasket section form needs to be provided, so that the vertical dislocation amount and the opening amount of the inter-ring joint of the pipe can be met under the action of the ground crack, and the waterproof performance of the inter-ring joint of the pipe is improved.
SUMMERY OF THE UTILITY MODEL
Aiming at the technical problems in the prior art, the utility model provides a sealing structure for a pipe ring joint of a shield tunnel, which aims to solve the technical problem that the contact stress of a contact surface between sealing gaskets is too small due to the stretched joint between pipe rings of the shield tunnel, so that the waterproof failure of the joint between the pipe rings is caused.
In order to achieve the purpose, the utility model adopts the technical scheme that:
the utility model provides a sealing structure for a pipe ring joint of a shield tunnel, which is arranged at the joint between a first pipe ring and a second pipe ring; the sealing structure comprises a first sealing gasket and a second sealing gasket which are arranged between pipe ring joints, and the cross sections of the first sealing gasket and the second sealing gasket are of inverted L-shaped structures;
the first sealing gasket comprises a first sealing horizontal section and a first sealing vertical section, and the first sealing vertical section extends into the space between the pipe ring joints; the first sealing horizontal section is vertically arranged at the exposed end of the first sealing vertical section and extends towards the outer side surface of the second pipe ring; the second sealing gasket comprises a second sealing horizontal section and a second sealing vertical section, the second sealing vertical section extends into the space between the pipe ring joints, and the second sealing horizontal section is vertically arranged at the exposed end of the second sealing vertical section;
one side of the first sealing vertical section is fixed with the joint end of the first pipe ring in a sealing way, the other side of the first sealing vertical section is fixed with one side of the second sealing vertical section in a sealing way, and the other side of the second sealing vertical section is fixed with the joint end of the second pipe ring in a sealing way; one side of the second sealing horizontal section is fixed with the outer side surface of the second pipe ring in a sealing way, and the other side of the second sealing horizontal section is tightly attached to the first sealing horizontal section.
Furthermore, the device also comprises a pre-buried baffle bar; the embedded baffle strip is arranged on the outer side surface of the second pipe ring and is close to the second sealing horizontal section; a wedge-shaped opening is formed in the side face of the embedded barrier strip and is close to the second sealing horizontal section; the end part of the extending end of the first sealing horizontal section is provided with a wedge-shaped head, and the wedge-shaped head is extruded and arranged in the wedge-shaped opening.
Furthermore, the pre-buried shelves strips adopt the rubber material shelves strips.
Furthermore, the exposed end of the first vertical sealing section extends to the outer side of the first pipe ring, and the extending length of the exposed end of the first vertical sealing section is the same as the thickness of the second horizontal sealing section.
Furthermore, a first sealing gasket mounting groove is formed in the joint end of the first pipe ring, the first sealing gasket mounting groove is arranged close to the outer side face of the first pipe ring, and the first sealing vertical section is arranged in the first sealing gasket mounting groove in a sealing mode;
the joint end of the second pipe ring is provided with a second sealing gasket mounting groove, the second sealing gasket mounting groove is arranged close to the outer side face of the second pipe ring, and the second sealing vertical section is arranged in the second sealing gasket mounting groove in a sealing mode.
Further, the width of the first sealing gasket mounting groove is smaller than the thickness of the first sealing vertical section; the width of the second gasket mounting groove is smaller than the thickness of the second sealing vertical section.
Furthermore, resin type environment-friendly adhesives are adopted to bond and fix the first sealing gasket and the first pipe ring, the second sealing gasket and the second pipe ring, and the second sealing horizontal section and the pre-buried shelves.
Furthermore, the first sealing gasket and the second sealing gasket are both ethylene propylene diene monomer sealing gaskets.
Compared with the prior art, the utility model has the beneficial effects that:
the utility model provides a sealing structure for a pipe ring joint of a shield tunnel, which is characterized in that two inverted L-shaped sealing gaskets are arranged at the pipe ring joint, and a vertical sealing section extends into the pipe ring joint to form a vertical waterproof layer; the sealing horizontal sections of the two sealing gaskets are vertically arranged at the exposed ends of the sealing vertical sections, and the sealing horizontal sections of the two sealing gaskets are sealed and fixed together to form a horizontal waterproof layer which is vertical to a joint between the pipe rings, so that the multi-waterproof structure has multiple waterproof capability, multi-dimensional waterproof is realized, the overall deformation capability is higher, damage caused by dislocation of joints between the pipe rings or horizontal tensioning is effectively avoided, and the waterproof capability is higher.
Furthermore, through setting up pre-buried shelves strip, with the wedge head extrusion setting of one of them sealed horizontal segment tip in the wedge mouth of pre-buried shelves strip, form wholly with the sealed pad connection on the adjacent pipe ring, effectively improved the whole deformability of two sealed pads, strengthened seal structure's waterproof ability greatly.
Drawings
FIG. 1 is a schematic view of an assembly structure of a sealing structure of a circumferential seam of a shield tunnel pipe according to the present invention;
FIG. 2 is a schematic view of a first gasket construction of the present invention;
fig. 3 is a schematic view of a second gasket structure according to the present invention.
The device comprises a first pipe ring 1, a second pipe ring 2, a first sealing gasket 3, a second sealing gasket 4 and a pre-buried baffle strip 5, wherein the first pipe ring, the second pipe ring, the first sealing gasket, the second sealing gasket and the pre-buried baffle strip are arranged in sequence; 31 a first sealed horizontal section, 32 a first sealed vertical section, 33 a wedge; 41 a second packer horizontal section, 42 a second sealed vertical section; 51 wedge-shaped opening.
Detailed Description
In order to make the technical problems, technical solutions and advantageous effects of the present invention more apparent, the following embodiments further describe the present invention in detail. It should be understood that the specific embodiments described herein are merely illustrative of the utility model and are not intended to limit the utility model.
As shown in fig. 1-3, the present invention provides a sealing structure for pipe ring joints of a shield tunnel, wherein the sealing structure is arranged at a joint between a first pipe ring 1 and a second pipe ring 2; the sealing structure comprises a first sealing gasket 3, a second sealing gasket 4 and a pre-buried baffle bar 5; the first sealing gasket 3 and the second sealing gasket 4 are arranged in a joint between the first pipe ring 1 and the second pipe ring 2, and the first sealing gasket 3 and the second sealing gasket 4 are fixed together in a sealing mode.
The first sealing gasket 3 comprises a first sealing horizontal section 31 and a first sealing vertical section 32, one end of the first sealing vertical section 32 extends into the space between the pipe ring joints, and the other end extends to the outer side of the first pipe ring 1; one end of the first sealing horizontal section 31 is vertically fixed at the exposed end of the first sealing vertical section 32, and the other end of the first sealing horizontal section 31 extends towards the outer side wall surface of the second pipe ring 2; preferably, the exposed end of the first vertical seal segment 32 extends for the same length as the thickness of the second horizontal seal segment 41.
The second sealing gasket 4 comprises a second sealing horizontal section 41 and a second sealing vertical section 42, one end of the second sealing vertical section 42 extends into the space between the pipe ring joints, and the other end extends to the outer side of the second pipe ring 2; one end of the second sealing horizontal section 41 is vertically fixed at the exposed end of the second sealing vertical section 42, and the other end of the second sealing horizontal section 41 extends towards the outer side wall surface of the second pipe ring 2.
One side of the first sealing vertical section 32 is fixed with the joint end of the first pipe ring 1 in a sealing way, the other side of the first sealing vertical section 32 is fixed with one side of the second sealing vertical section 42 in a sealing way, and the other side of the second sealing vertical section 42 is fixed with the joint end of the second pipe ring 2 in a sealing way; one side of the second sealing horizontal section 41 is fixed with the outer side surface of the second pipe ring 3 in a sealing way, and the other side is fixed with the extending end of the first sealing horizontal section 31 in a sealing way.
The embedded baffle strip 5 is arranged on the outer side surface of the second pipe ring 2 and is close to the second sealing horizontal section 41, and the embedded baffle strip 5 and the end part of the second sealing horizontal section 41 are fixed in a sealing mode; a wedge-shaped opening 51 is formed in the side face of the embedded barrier strip 5 and is arranged close to one side of the second sealing horizontal section 41; the extending end of the first sealing horizontal segment 31 is provided with a wedge head 33, and the wedge head 33 is arranged in the wedge opening 51 in a pressing mode.
In the utility model, a first sealing gasket mounting groove is arranged at the joint end of a first pipe ring 1, the first sealing gasket mounting groove is arranged close to the outer side wall surface of the first pipe ring 1, and a first sealing vertical section 32 is arranged in the first sealing gasket mounting groove in a sealing manner; the seam end of second pipe ring 2 is provided with the sealed mounting groove of second packing, and the sealed mounting groove of second packing sets up near the outside wall of second pipe ring 2, and the sealed vertical section 42 of second seals is sealed to be set up in the sealed mounting groove of second packing.
Wherein the width of the first gasket mounting groove is less than the thickness of the first vertical sealing section 32 and the width of the second gasket mounting groove is less than the thickness of the second vertical sealing section 42; through the width that is less than the width of the first sealed vertical section 32 of filling up the mounting groove of filling up and the width that is less than the second sealed vertical section 42 of filling up the mounting groove of second, guaranteed to produce mutual squeezing action between the first sealed vertical section and the second sealed vertical section, improve sealed effect.
Resin type environment-friendly adhesives are adopted to bond and fix the first sealing gasket 3 and the first pipe ring 1, the second sealing gasket 4 and the second pipe ring 2, and the second sealing horizontal section 41 and the pre-buried baffle bar 5; the first sealing gasket 3 and the second sealing gasket 4 are both made of ethylene propylene diene monomer sealing gaskets; the pre-buried baffle strips 5 are made of rubber; preferably, the rubber material barrier strip is made of ethylene propylene diene monomer.
The structure and the construction process of the sealing structure of the circumferential joint of the shield tunnel pipe according to the present invention will be described in detail below.
The utility model relates to a sealing joint of a shield tunnel pipe annular jointThe structure comprises a first sealing gasket 3 and a second sealing gasket 4, wherein the first sealing gasket 3 is arranged at the joint end of the first pipe ring 1, and the cross section structure of the first sealing gasket 3 is inverted L-shaped; the joint end of the first pipe ring 1 is provided with
The type notch, as first sealed packing mounting groove, the first sealed vertical section 32 of first sealed packing 3 passes through resin type environmental protection adhesive bonding to be fixed in first sealed packing mounting groove.
The second sealing gasket 4 is arranged at the joint end of the second pipe ring 2, and the cross section of the second sealing gasket 4 is of an inverted L shape; the joint end of the second pipe ring 2 is provided with
And the groove opening is used as a second sealing gasket mounting groove, and the second sealing vertical section 42 of the second sealing gasket 4 is bonded and fixed in the second sealing gasket mounting groove through a resin type environment-friendly adhesive.
The lateral surface of second pipe ring 2 is provided with pre-buried shelves strip 5, and pre-buried shelves strip 5 is close to the tip setting of second sealed horizontal segment 41 to, the side of pre-buried shelves strip 5 passes through resin type environmental protection adhesive bonding fixed with the tip of second sealed horizontal segment 41.
The first sealing vertical section 32 of the first sealing gasket 3 extends towards the outer side of the first pipe ring 1, and the first sealing horizontal section 31 of the first sealing gasket 3 is vertically arranged at the exposed end of the first sealing vertical section 32; the exposed end of the first vertical seal segment 32 extends the same length as the thickness of the second horizontal seal segment 41.
The extending end of the first sealing horizontal section 31 extends to the position of the embedded barrier strip 5 towards the second pipe ring 2, a wedge-shaped opening 51 is formed in the side face of the embedded barrier strip 5, a wedge-shaped head 33 is arranged at the end part of the extending end of the first sealing horizontal section 31, and the wedge-shaped head 33 is extruded into the wedge-shaped opening 51; the wedge-shaped opening on the pre-buried baffle strip 5 is utilized to enable the first sealing horizontal section 31 and the second sealing horizontal section 41 to generate mutual extrusion acting force to form an integral structure,
the first sealing gasket 3, the second sealing gasket 4 and the embedded blocking strip 5 are all made of ethylene propylene diene monomer rubber materials; after the first pipe ring 1 and the second pipe ring 2 are assembled, the first sealing gasket 3, the second sealing gasket 4 and the pre-buried baffle bar 5 form a multi-dimensional inverted L-shaped sealing structure at the joint of the pipe rings; wherein, form horizontal waterproof layer in the outside of perpendicular to pipe ring seam, form vertical waterproof layer in pipe ring seam.
The construction method of the shield tunnel pipe circular seam sealing structure comprises the following steps:
after the first pipe ring is installed, installing a first sealing gasket at the abutted seam end of the first pipe ring;
mounting a second sealing gasket and a pre-buried baffle at the joint end of the second pipe ring;
hoisting the second pipe ring to a preset installation position so as to enable the second sealing horizontal section to be tightly attached to the first sealing horizontal section, and extruding the wedge-shaped head of the first sealing horizontal section into the wedge-shaped opening of the pre-buried baffle bar;
and fixing the second pipe ring, namely finishing the installation of the sealing structure of the pipe ring joint of the shield tunnel.
According to the sealing structure for the pipe ring joint of the shield tunnel, a pair of sealing gaskets with the inverted L-shaped cross sections and pre-buried baffle strips which are tightly attached to the outer sides of the pipe ring joint are used for integrally forming a horizontal waterproof layer perpendicular to the pipe ring joint and a vertical waterproof layer in the pipe ring joint, so that a multi-dimensional waterproof structure is formed, the sealing structure has multiple waterproof capabilities, and the waterproof problem is fundamentally solved; the two sealing gaskets are connected into a whole by the aid of the pre-buried baffle strips, so that the whole deformation capacity of the sealing structure is effectively improved, and water stopping damage caused by dislocation and horizontal tensioning of joints between pipe rings is prevented; the sealing structure is used for sealing joints among pipe rings of the shield tunnel, and the multi-layer inverted L-shaped sealing structure on the outer side of the pipe ring indirect joint has multi-dimensional waterproof capability, so that the sealing structure can prevent the stress of a sealing gasket contact surface from being reduced under the action of ground cracks and prevent the sealing gasket from being separated from the sealing groove due to excessive friction, water seepage at the joints of the pipe rings is avoided, and the sealing structure has important practical significance.
The above-described embodiment is only one of the embodiments that can implement the technical solution of the present invention, and the scope of the present invention is not limited by the embodiment, but includes any variations, substitutions and other embodiments that can be easily conceived by those skilled in the art within the technical scope of the present invention disclosed.
Claims (8)
1. A shield tunnel pipe ring joint sealing structure is characterized in that the sealing structure is arranged at a joint between a first pipe ring (1) and a second pipe ring (2); the sealing structure comprises a first sealing gasket (3) and a second sealing gasket (4) which are arranged between pipe ring joints, and the cross sections of the first sealing gasket (3) and the second sealing gasket (4) are both of inverted L-shaped structures;
the first sealing gasket (3) comprises a first sealing horizontal section (31) and a first sealing vertical section (32), and the first sealing vertical section (32) extends into the space between the pipe ring joints; the first sealing horizontal section (31) is vertically arranged at the exposed end of the first sealing vertical section (32) and extends towards the outer side surface of the second pipe ring (2); the second sealing gasket (4) comprises a second sealing horizontal section (41) and a second sealing vertical section (42), the second sealing vertical section (42) extends into the space between the pipe ring joints, and the second sealing horizontal section (41) is vertically arranged at the exposed end of the second sealing vertical section (42);
one side of the first sealing vertical section (32) is fixed with the joint end of the first pipe ring (1) in a sealing way, the other side of the first sealing vertical section (32) is fixed with one side of the second sealing vertical section (42) in a sealing way, and the other side of the second sealing vertical section (42) is fixed with the joint end of the second pipe ring (2) in a sealing way; one side of the second sealing horizontal section (41) is fixed with the outer side surface of the second pipe ring (2) in a sealing way, and the other side of the second sealing horizontal section is tightly attached to the first sealing horizontal section (31).
2. The seal structure of the circumferential joint of the shield tunnel pipe according to claim 1, further comprising a pre-buried barrier strip (5); the embedded blocking strip (5) is arranged on the outer side surface of the second pipe ring (2) and is close to the second sealing horizontal section (41); a wedge-shaped opening (51) is formed in the side face of the embedded barrier strip (5), and the wedge-shaped opening (51) is arranged close to the second sealing horizontal section (41); the end part of the extending end of the first sealing horizontal section (31) is provided with a wedge-shaped head (33), and the wedge-shaped head (33) is arranged in the wedge-shaped opening (51) in an extruding way.
3. The sealing structure of the circumferential joint of the shield tunnel pipe according to claim 2, wherein the pre-buried barrier strips (5) are made of rubber.
4. The pipe ring seam sealing structure of the shield tunnel according to claim 1, wherein the exposed end of the first vertical sealing segment (32) extends to the outside of the first pipe ring (1), and the exposed end of the first vertical sealing segment (32) extends to the same length as the thickness of the second horizontal sealing segment (41).
5. The pipe ring joint sealing structure of the shield tunnel according to claim 1, wherein the joint end of the first pipe ring (1) is provided with a first gasket mounting groove, the first gasket mounting groove is arranged near the outer side surface of the first pipe ring (1), and the first sealing vertical section (32) is arranged in the first gasket mounting groove in a sealing manner;
the joint end of second pipe ring (2) is provided with the sealed mounting groove of second packing, and the sealed lateral surface that fills up the mounting groove and be close to second pipe ring (2) sets up of second, and the sealed vertical section of second (42) is sealed to be set up in the sealed mounting groove of second packing.
6. The seal structure of the circumferential joint of the shield tunnel pipe according to claim 5, wherein the width of the first gasket mounting groove is smaller than the thickness of the first seal vertical section (32); the width of the second gasket mounting groove is smaller than the thickness of the second vertical gasket sealing section (42).
7. The sealing structure of the pipe ring joint of the shield tunnel according to claim 2, wherein the first sealing gasket (3) and the first pipe ring (1), the second sealing gasket (4) and the second pipe ring (2), and the second sealing horizontal section (41) and the pre-buried baffle bar (5) are bonded and fixed by resin type environment-friendly adhesive.
8. The sealing structure of the annular joint of the shield tunnel pipe according to claim 1, wherein the first sealing gasket (3) and the second sealing gasket (4) are both ethylene propylene diene monomer sealing gaskets.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121766159.6U CN215332885U (en) | 2021-07-30 | 2021-07-30 | Shield tunnel pipe circumferential weld seal structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121766159.6U CN215332885U (en) | 2021-07-30 | 2021-07-30 | Shield tunnel pipe circumferential weld seal structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215332885U true CN215332885U (en) | 2021-12-28 |
Family
ID=79574419
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121766159.6U Active CN215332885U (en) | 2021-07-30 | 2021-07-30 | Shield tunnel pipe circumferential weld seal structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215332885U (en) |
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2021
- 2021-07-30 CN CN202121766159.6U patent/CN215332885U/en active Active
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