CN210660137U - Shield constructs end ring beam and section of jurisdiction seam crossing seepage maintenance structure - Google Patents
Shield constructs end ring beam and section of jurisdiction seam crossing seepage maintenance structure Download PDFInfo
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- CN210660137U CN210660137U CN201920966050.3U CN201920966050U CN210660137U CN 210660137 U CN210660137 U CN 210660137U CN 201920966050 U CN201920966050 U CN 201920966050U CN 210660137 U CN210660137 U CN 210660137U
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Abstract
The utility model provides a shield constructs end ring beam and section of jurisdiction seam crossing seepage maintenance structure, including interior bushing wall, ring beam and section of jurisdiction, the ring beam retainer ring is located interior bushing wall inboard and is located tunnel entrance to a cave department, the section of jurisdiction ring locate interior bushing wall inboard and with ring beam fixed connection, it has foam filling material, joint sealing clay to fill in proper order in the ring beam and the annular seam of section of jurisdiction, foam filling material is located the inner ring department of joint sealing clay, the surface that is located the ring beam of annular seam crossing and section of jurisdiction is equipped with the adhesive layer that is suitable for covering joint sealing clay, the adhesive layer surface is equipped with sealing adhesive tape layer. This shield constructs end ring roof beam and section of jurisdiction seam crossing seepage maintenance structure through multi-level waterproof construction, makes the seam crossing resume original waterproof construction, solves the percolating water problem, and does not destroy seam peripheral concrete.
Description
Technical Field
The utility model belongs to the technical field of the shield tunnel structure, concretely relates to shield constructs end ring beam and section of jurisdiction seam crossing seepage maintenance structure.
Background
The shield constructs the section of jurisdiction and is the main assembly component of shield tunnel construction, locates inside the interior wall of tunnel, is the inlayer protective screen in tunnel, undertakes the effect of resisting soil layer pressure, groundwater pressure and some special loads, and the ring beam is the interior wall of shield end and the structure of shield section of jurisdiction junction, and the primary function is to be connected shield section of jurisdiction and the interior wall of shield end, and plays the effect of interface stagnant water. Under the general condition, the shield segment is a concrete prefabricated structure, the ring beam is a concrete cast-in-place structure, in the construction process, in order to ensure the waterproof performance of the shield tunnel structure, an expansion water stop strip which expands when meeting water is arranged in a joint of the cast-in-place concrete ring beam and the prefabricated concrete segment, the expansion water stop strip automatically expands 2-3 times when meeting water and fills gaps among holes, and in addition, a grouting filling layer is used as a waterproof layer between the shield segment and the inner lining wall. However, as the shield segment and the ring beam both belong to mass concrete, the shield segment and the ring beam are very sensitive to thermal expansion and cold contraction caused by temperature difference change, and are very easy to pull at a position with poor cohesion in the concrete to form a defect, long-term vibration disturbance easily causes a water gap to appear at the joint of the cast-in-place ring beam and the segment, and a grouting filling layer is not full or a new gap appears due to later deformation, the shield is generally positioned below an underground water line, runoff formed by underground water and ground rainfall can generate large water pressure which exists for a long time, and the water gap appears at the joint of the cast-in-place ring beam and the segment or the water leakage generated inside the shield tunnel is very easy to generate when the gap appears in the grouting filling layer. Once water leakage occurs at the joint of the ring beam and the pipe piece, the joint needs to be maintained, and the method for maintaining and treating the joint in the prior art is complex, such as the patent document with the patent name of CN109184707A, namely the water seepage treatment method of the shield receiving tunnel portal; in addition, the foamed polyurethane crack repair process commonly adopted in the prior art needs to widen the joint, which can damage the concrete around the joint and damage the compressive strength of the concrete.
SUMMERY OF THE UTILITY MODEL
The utility model provides a technical problem provide a shield constructs end ring beam and section of jurisdiction seam crossing seepage maintenance structure, through multi-level waterproof construction, make seam crossing resume original waterproof construction, solve the percolating water problem, and do not destroy the peripheral concrete of seam.
In order to solve the problems, the utility model provides a shield end ring beam and duct piece seam leakage maintenance structure, which comprises a lining wall, a ring beam and a duct piece, wherein a ring beam fixing ring is arranged at the inner side of the lining wall and is positioned at the tunnel opening; the surfaces of the ring beam and the segment at the annular joint are provided with adhesive layers suitable for covering joint sealing plaster, and the surfaces of the adhesive layers are provided with sealing adhesive tape layers.
In the technical scheme, preferably, a grouting material is filled between the duct piece and the inner lining wall to form a grouting filling layer.
In the technical scheme, preferably, the annular joint is further filled with a grouting material, and the grouting material is located at an inner ring of the foam filling material.
In the technical scheme, preferably, a plurality of expansion water stop strips are further arranged in the annular joint and/or in the gap between the ring beam and the inner lining wall and/or in the gap between the duct piece and the grouting filling layer.
In the technical scheme, preferably, a plurality of grouting holes are formed in the pipe piece, the grouting holes extend from the inner surface of the pipe piece to the grouting filling layer, and grouting materials are filled in the grouting holes.
In the technical scheme, preferably, each grouting hole is arranged along the radial direction of the segment and is circumferentially arranged along the ring of the axis of the segment perpendicular to the segment.
In the technical scheme, preferably, the distance between the grouting hole and the annular seam is 150-250 mm; further preferably, the distance between the grouting holes and the joint is 200 mm.
In the technical scheme, preferably, the distance between adjacent grouting holes is 250-350 mm; further preferably, the distance between adjacent grouting holes is 300 mm.
In the technical scheme, preferably, the adhesive layer takes the annular seam as a symmetrical center line, and the width of the adhesive layer is 250-350 mm; more preferably, the width of the adhesive layer is 300 mm.
In the technical scheme, preferably, the ring beam is formed by cast-in-place concrete in reinforcing steel bars, and the ring beam is connected with the duct piece and the ring beam is connected with the lining wall through embedded reinforcing steel bars.
Compared with the prior art, the utility model, following beneficial effect has: according to the leakage maintenance structure for the joints of the shield end ring beam and the duct piece, foam filling materials are filled in the joints, the joints are sealed through joint sealing cement, grouting materials are filled in the joints, sealing tapes are fixedly bonded at the tops of the joints through adhesives after sealing, and multi-level waterproof structures are matched to form waterproof consolidation filling of a first-level grouting filling layer; sealing the second layer of foam filling material and joint sealing plaster; the multilayer waterproof structure sealed by the third-layer adhesive layer and the sealing adhesive tape is combined rigidly and flexibly, so that water leaked from a joint between the duct piece and the ring beam can be effectively blocked, and the leakage at the joint between the shield end cast-in-place ring beam structure and the duct piece is thoroughly solved; the maintenance process of the maintenance structure has simple steps, does not damage the concrete structure at the periphery of the crack, and does not damage the compressive strength of the concrete.
Drawings
Fig. 1 is a cross-sectional view of a leakage maintenance structure at a joint between a shield end ring beam and a segment according to an embodiment of the present invention;
fig. 2 is a partially enlarged view of a portion a in fig. 1.
Wherein: 1-lining wall; 2-ring beam; 3-a pipe piece; 4-a foam filling material; 5-sealing joint plaster; 6-an adhesive layer; 7-sealing adhesive tape layer; 8-grouting a filling layer; 9-expansion water stop strip; 10-grouting holes.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
It should be noted that, since the duct piece and the ring beam are both in a circular ring structure, the term "outer ring" refers to the side of the duct piece or the ring beam near the outside of the tunnel, i.e., the side of the outside of the ring, "inner ring" refers to the side near the inside of the tunnel, i.e., the side of the inside of the ring.
In the shield tunnel, the section of jurisdiction all belongs to bulky concrete with the ring beam, and expend with heat and contract with cold is very sensitive, very easily gathers the relatively poor position of power and pulls the formation defect in the concrete, and consequently, the water gap appears in the seam position that long-term vibrations disturbance very easily leads to cast-in-place ring beam and section of jurisdiction, and the slip casting filling layer slip casting is not full or because of the new gap appears in the deformation in later stage, and because the shield constructs below generally being located the groundwater bit line, very easily produces the seepage of water at the seam position, for solving this problem, the utility model provides a shield end ring beam and section of jurisdiction seam leakage maintenance structure.
As shown in fig. 1 and 2, the leakage maintenance structure for the joint between the shield end ring beam and the segment of the present embodiment includes a lining wall 1, a ring beam 2 and a segment 3, wherein the ring beam 2 is fixedly and annularly arranged on the inner side of the lining wall 1 and located at the tunnel opening, the segment 3 is annularly arranged on the inner side of the lining wall 1 and fixedly connected with the ring beam 2, a foam filling material 4 and a joint sealing cement 5 are sequentially filled in the ring joint between the ring beam 2 and the segment 3, and the foam filling material 4 is located at the inner ring of the joint sealing cement 5; the surfaces of the ring beam 2 and the pipe piece 3 positioned at the annular joint are provided with an adhesive layer 6 suitable for covering the joint sealing plaster 5, and the surface of the adhesive layer 6 is provided with a sealing adhesive tape layer 7.
According to the leakage maintenance structure for the joints of the shield end ring beam and the duct piece, foam filling materials are filled in the ring joints, then the ring joints are sealed through joint sealing cement, and sealing tapes are fixedly bonded at the joints through adhesives after sealing to form a multi-layer waterproof structure, so that water from the leakage of the joints of the duct piece and the ring beam can be effectively blocked, and the leakage of the joints of the shield end ring beam and the duct piece is solved; and the maintenance process of the maintenance structure has simple steps, does not damage the concrete structure at the periphery of the crack and does not damage the compressive strength of the concrete.
Wherein, section of jurisdiction 3 is precast concrete structure, and ring beam 2 is cast in situ concrete structure, is connected through embedded steel between ring beam 2 and the section of jurisdiction 3, is connected through embedded steel between ring beam 2 and interior headwall 1.
The foam filling material 4 can be foam expansion adhesive tape adhered to two base surfaces in the joint, or foam strips, the shape type of the foam filling material can be selected according to the depth of the crack, the foam filling material belongs to the prior art, is a material commonly used in building engineering for filling the crack and the gap of the building, and can be made of polyurethane, polyethylene, rubber and the like.
The joint sealing daub 5 belongs to the prior art, is a commonly used material for sealing structures such as cracks in building engineering, and can be made of different materials according to actual conditions, such as joint sealing daubs taking epoxy resin as a main agent.
The adhesive layer 6 is a layer structure formed by coating adhesive on the surfaces of the ring beam and the segment at the periphery of the joint, the adhesive is used for firmly bonding the sealing adhesive tape at the periphery of the joint and can be realized by using adhesives made of different materials in the prior art, preferably, the adhesive is a two-component thixotropic adhesive, so that the bonding strength is better, and the structural sealing performance at the joint is better. The coating width of the adhesive can be selected according to actual conditions, but the width of the adhesive layer is too narrow, the bonding strength of the adhesive layer to the sealing tape is not enough, the sealing tape is easy to fall off, the sealing effect of the joint is poor, the width of the adhesive layer is too wide, the waste of the adhesive and the sealing tape is caused, and the structures of the ring beam and the surface of the duct piece are influenced. Preferably, the adhesive layer 6 has a width of 250 to 350mm with the center line of the seam as the center line of symmetry, and more preferably, the adhesive layer 6 has a width of 300 mm.
In the technical scheme, preferably, a grouting filling layer 8 is formed by filling a grouting material between the duct piece 3 and the inner lining wall 1, and a grouting filling layer is formed by filling a grouting material between the duct piece 3 and the inner lining wall 1 and is used as a waterproof layer between the duct piece and the inner lining wall, so that the waterproof reliability of the shield tunnel is greatly improved, the waterproof structure is suitable for waterproof joints of the shield tunnel, and is particularly suitable for tunnels with strong stratum water permeability and large water pressure or tunnels with high waterproof requirements;
in the technical scheme, preferably, the annular joint is filled with grouting materials. Fill grouting material in the annular joint, form the waterproof construction of another level in annular joint, with joint sealing clay and the waterproof structure cooperation of sealing tape, formed: the first-level waterproof structure comprises: waterproof consolidation filling of the grouting filling layer; the second-level waterproof structure: foam filling materials and joint sealing daub; the third-level waterproof structure: the multilayer waterproof structure of the adhesive layer and the sealing adhesive tape thoroughly solves the problem of leakage at the joint of the shield end cast-in-place ring beam structure and the duct piece.
The grouting material belongs to the prior art, and the plugging grouting material commonly used in the prior art can be used, such as a mixture of rubberized asphalt, resin, an accelerant, an initiator and the like.
In the technical scheme, preferably, the area of the annular joint, which is close to the inner ring of the ring beam 2, is filled with the foam filling material 4, the end part of the joint, which is close to the inner ring of the ring beam 2, is sealed by the joint sealing mortar, and the rest area of the annular joint is filled with the grouting material. The filling thickness of the foamed filling material is preferably in the range of 6-10 mm. As shown in fig. 1, a ring beam is positioned at the bottom of the tunnel, a foam filling material 4 is filled in the top area of the joint of the ring beam and the segment, and a sealing mastic is filled above the foam filling material to seal the joint above the foam filling material.
In the technical scheme, preferably, a plurality of expansion water stop strips 9 are further arranged between joints of the ring beam 2 and the pipe piece 3, between the ring beam 2 and the inner lining wall 1 and between the pipe piece 3 and the grouting filling layer 8, and the expansion water stop strips 9 have the performance of common rubber products and the performance of self expansion when meeting water so as to stop water. The expansion water stop rod expands when meeting water, the expansion multiplying power is generally 2-3 times, the expansion water stop rod is installed at the joint of each structure, and when meeting water, the expansion water stop rod absorbs water to expand to fill space gaps and prevent water from spreading. The expansion water stop strip belongs to the prior art, and has been widely applied to construction joints, expansion joints and the like of projects such as swimming pools, sewage treatment projects, underground railways and the like as a waterproof piece.
In the technical scheme, preferably, a plurality of grouting holes 10 are formed in the duct piece 3, the grouting holes 10 extend into the grouting filling layer 8 from the inner surface of the duct piece 3, and grouting materials are filled in the grouting holes 10. The water passing gap appears at the joint part of the ring beam and the pipe piece due to long-term vibration disturbance, the pipe piece is drilled, the grouting hole is introduced into the grouting filling layer, and the gap is filled through grouting of the grouting hole to form waterproof consolidation filling.
In the technical scheme, preferably, each grouting hole 10 is arranged along the radial direction of the segment and is circumferentially arranged along a ring of the axis of the segment perpendicular to the same direction. As the shield segment is in a circular ring shape, the grouting holes are formed along the same circumference, so that the grouting is more uniform.
In the technical scheme, the distance between the grouting holes 10 and the annular seam is preferably 150-250 mm. When the distance between the grouting hole 10 and the annular joint is too small, the concrete structure around the joint is damaged when the hole is drilled, and when the distance is too large, the joint cannot be filled by grouting, so that the filling effect is poor. It is further preferred that the distance between the injection hole 10 and the joint is 200 mm.
In the technical scheme, the distance between the adjacent grouting holes 10 is preferably 250-350 mm. Further preferably, the distance between adjacent injection holes 10 is 300 mm.
The construction method of the leakage maintenance structure at the joint of the shield end ring beam and the segment comprises the following specific steps:
1. cleaning joints at joints of the duct pieces and the ring beams by taking the center lines of the joints as center lines and respectively cleaning 150mm of two sides in the width direction of the joints, and polishing and cleaning the working surface;
2. cleaning two side surfaces of a joint, adhering foam expansion adhesive tapes on the two side surfaces, and sealing the joint of the top of the foam expansion adhesive tapes by using joint sealing adhesive plaster;
3. drilling grouting holes on the inner side surface of the duct piece, wherein the grouting holes extend from the inner surface of the duct piece to the grouting filling layer along the radial direction of the duct piece, and the distance between the grouting holes and the joint is 200 mm;
4. drilling a plurality of grouting holes at intervals on the inner side surface of the duct piece, wherein the plurality of grouting holes are distributed along the same circle vertical to the axis of the duct piece, and the pitch between every two adjacent grouting holes is 300 mm;
5. mounting grouting needles on the grouting holes;
6. a multi-component plugging grouting material (polymers of rubber asphalt, resin, an accelerant, an initiator and the like) is poured into a gap between an original grouting filling layer and a joint through a grouting needle, the polymerization time of the grouting material is about 10 seconds, and grouting pressure is point pouring, low pressure and intermittent grouting at the temperature of 25 ℃;
7. after grouting is finished, polishing and cleaning the inner wall surface of the tube again, taking a joint as a central line, cleaning the width of the joint to be 300mm, and coating a bi-component thixotropic adhesive on a cleaned base surface;
8. sticking a sealing adhesive tape special for the deformation joint on the thixotropic adhesive;
9. dredging bottom drainage facilities and ensuring smooth drainage.
In the leakage maintenance structure for the joints of the shield end ring beam and the duct piece, the joints are filled with foam filling materials and sealed by joint sealing cement, grouting materials are filled in the joints, sealing tapes are fixedly bonded at the tops of the joints by adhesives after sealing, and a first-level grouting filling layer is formed by waterproof consolidation filling due to matching of multi-level waterproof structures; sealing the second layer of foam filling material and joint sealing plaster; the multilayer waterproof structure sealed by the third-layer adhesive layer and the sealing adhesive tape can effectively block water leaked from a joint between the duct piece and the ring beam, and thoroughly solves the problem of leakage at the joint between the shield end cast-in-place ring beam structure and the duct piece; the maintenance process of the maintenance structure has simple steps, does not damage the concrete structure at the periphery of the crack, and does not damage the compressive strength of the concrete.
It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications can be made without departing from the scope of the invention.
Claims (10)
1. The utility model provides a shield constructs end ring beam and section of jurisdiction seam crossing seepage maintenance structure which characterized in that: the tunnel sealing structure comprises a lining wall, a ring beam and a duct piece, wherein the ring beam fixing ring is arranged on the inner side of the lining wall and is positioned at a tunnel opening, the duct piece is arranged on the inner side of the lining wall in a surrounding manner and is fixedly connected with the ring beam, a foam filling material and joint sealing cement are sequentially filled in an annular joint of the ring beam and the duct piece, and the foam filling material is positioned at an outer ring of the joint sealing cement; and the surfaces of the ring beam and the segment at the annular joint are provided with adhesive layers suitable for covering the joint sealing plaster, and the surfaces of the adhesive layers are provided with sealing adhesive tape layers.
2. The shield end ring beam and segment joint leakage maintenance structure of claim 1, characterized in that: and grouting materials are filled between the duct piece and the inner lining wall to form a grouting filling layer.
3. The shield end ring beam and segment joint leakage maintenance structure of claim 2, characterized in that: the annular joint is also filled with the grouting material, and the grouting material is positioned at the outer ring of the foam filling material.
4. The shield end ring beam and segment joint leakage maintenance structure of claim 2 or 3, characterized in that: and a plurality of expansion water stop strips are further arranged in the annular joint and/or in the gap between the ring beam and the inner lining wall and/or in the gap between the duct piece and the grouting filling layer.
5. The shield end ring beam and segment joint leakage maintenance structure of claim 2 or 3, characterized in that: be equipped with a plurality of injected holes on the section of jurisdiction, the injected hole by the internal surface of section of jurisdiction extends to in the slip casting filling layer, it has to fill in the injected hole grouting material.
6. The shield end ring beam and segment joint leakage maintenance structure of claim 5, characterized in that: each grouting hole is arranged along the radial direction of the segment and is circumferentially distributed on the ring perpendicular to the axis of the segment.
7. The shield end ring beam and segment joint leakage maintenance structure of claim 5, characterized in that: the distance between the grouting holes and the annular seam is 150-250 mm.
8. The shield end ring beam and segment joint leakage maintenance structure of claim 5, characterized in that: the distance between adjacent grouting holes is 250-350 mm.
9. The shield end ring beam and segment joint leakage maintenance structure of any one of claims 1-3, characterized in that: the adhesive layer takes the annular seam as a symmetrical center line, and the width of the adhesive layer is 250-350 mm.
10. The shield end ring beam and segment joint leakage maintenance structure of any one of claims 1-3, characterized in that: the ring beam is formed by casting concrete in a reinforcing steel bar in situ, and the ring beam is connected with the duct piece and the ring beam is connected with the lining wall through embedded reinforcing steel bars.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920966050.3U CN210660137U (en) | 2019-06-25 | 2019-06-25 | Shield constructs end ring beam and section of jurisdiction seam crossing seepage maintenance structure |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920966050.3U CN210660137U (en) | 2019-06-25 | 2019-06-25 | Shield constructs end ring beam and section of jurisdiction seam crossing seepage maintenance structure |
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| CN210660137U true CN210660137U (en) | 2020-06-02 |
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| CN201920966050.3U Active CN210660137U (en) | 2019-06-25 | 2019-06-25 | Shield constructs end ring beam and section of jurisdiction seam crossing seepage maintenance structure |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113356897A (en) * | 2021-05-19 | 2021-09-07 | 中国建筑第五工程局有限公司 | Shield access portal ring beam assembly type structure and construction method |
| CN113389570A (en) * | 2021-07-30 | 2021-09-14 | 西安建筑科技大学 | Shield tunnel pipe annular joint sealing structure and construction method thereof |
-
2019
- 2019-06-25 CN CN201920966050.3U patent/CN210660137U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113356897A (en) * | 2021-05-19 | 2021-09-07 | 中国建筑第五工程局有限公司 | Shield access portal ring beam assembly type structure and construction method |
| CN113356897B (en) * | 2021-05-19 | 2023-09-12 | 中国建筑第五工程局有限公司 | Assembled structure of shield passageway portal ring beam and construction method |
| CN113389570A (en) * | 2021-07-30 | 2021-09-14 | 西安建筑科技大学 | Shield tunnel pipe annular joint sealing structure and construction method thereof |
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Effective date of registration: 20220111 Address after: 215031 rooms 504 and 506, No. 279, Xiyuan Road, Gusu District, Suzhou City, Jiangsu Province Patentee after: Dongfang Yuhong Construction Engineering Co.,Ltd. Address before: 215002 room 101-2, F3 building, 88 Dongchang Road, Suzhou Industrial Park, Suzhou City, Jiangsu Province Patentee before: DONGFANG YUHONG BUILDING REPAIR TECHNOLOGY Co.,Ltd. |