CN212867583U - Waterproof structure for thin-wall two-lining deformation joint of sewage tunnel - Google Patents
Waterproof structure for thin-wall two-lining deformation joint of sewage tunnel Download PDFInfo
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- CN212867583U CN212867583U CN202021132240.4U CN202021132240U CN212867583U CN 212867583 U CN212867583 U CN 212867583U CN 202021132240 U CN202021132240 U CN 202021132240U CN 212867583 U CN212867583 U CN 212867583U
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Abstract
The utility model discloses a waterproof construction for two lining movement joints of sewage tunnel thin wall, this waterproof construction has set gradually outer formula rubber waterstop, closed cell polyethylene cystosepiment, modified polysulfide sealant, first layer butyl rubber waterproof sealing sticky tape, omega rubber waterstop, second floor butyl rubber waterproof sealing sticky tape, stainless steel metal pressing plate, the mechanical crab-bolt of expansion type torque control formula, polymer cement mortar from first lining cutting to secondary lining direction. Through the mutual cooperation of the materials, an effective and stable deformation joint waterproof sealing structure is formed, the integrity can be guaranteed under long-term sewage environment and external force impact, tearing and gaps caused by contraction or expansion of the deformation joint due to general external force and natural sedimentation are avoided, and the waterproof quality of the thin-wall two-lining deformation joint of the sewage tunnel is effectively improved. The construction method is simple and convenient in process, compared with the traditional buried deformation joint structure, secondary lining construction is not influenced, and the construction period can be shortened while the waterproof quality of the deformation joint is ensured.
Description
Technical Field
The utility model relates to a tunnel building waterproof construction technical field specifically is a waterproof structure that is used for two lining movement joints of sewage tunnel thin wall.
Background
The underground tunnel is in the relatively poor section of geological conditions, receives the inhomogeneous influence of weak foundation factor of land and tectonic load, and the deformation difference of structure probably causes the structure crack, destroys, and inevitable needs in the lining in-process predetermine the movement joint so that guarantee the structure safety, and the movement joint sets up the interval and need littleer than conventional. The traditional construction method is that a 2-3 cm gap is formed between a first pouring lining section and a second pouring lining section, a middle buried steel edge rubber waterstop or a galvanized red copper waterstop is arranged between two end linings, a gap is filled by adopting a joint filling material, a rubber waterstop is arranged between a primary lining and a secondary lining, and a water receiving box is arranged at the arch top of the tunnel.
The method is used for the conventional tunnel secondary lining, but when the method is used for a secondary lining structure with smaller thickness, the conventional deformation joint waterproof treatment method has the following defects: firstly, the secondary lining is small in thickness, if a middle-buried steel-edged rubber water stop belt or a galvanized red copper water stop belt is arranged, the deformation joint is difficult to seal tightly, the problem that the top of an arch wall is difficult to pour compactly is caused, the top of the secondary lining is hollowed and forms a water permeable channel, and the waterproof effect cannot be achieved; and secondly, the deformation joint is a waterproof weak part of the tunnel, and the deformation joint of the sewage tunnel not only ensures that external water does not leak inwards, but also prevents sewage from leaking outwards. In the traditional construction method, the water stopping material is buried in the concrete structure, the secondary lining is small in thickness and limited in space, the structure belongs to a thin-wall structure, concrete cannot completely enter the position below the buried water stopping material, cavities are easily formed at deformation joints, and the structure has defects. Under the long-term action of bearing external load and sewage internal pressure, the concrete at the deformation joint is easy to crack, and the waterproof function is lost.
Disclosure of Invention
In order to overcome the poor technical defect of water-proof effects of tunnel secondary lining movement joint among the prior art, the utility model provides a waterproof structure for two lining movement joints of sewage tunnel thin wall can satisfy secondary lining's movement joint waterproof requirement, especially the prevention of seepage requirement under the sewage environment to can make movement joint and sewage tunnel reach the effect of integration through above-mentioned waterproof structure, solve above-mentioned technical problem.
The utility model discloses a following technical scheme realizes above-mentioned purpose, a new waterproof structure of two lining movement joints of sewage tunnel thin wall, including outer formula rubber waterstop, closed cell polyethylene cystosepiment, the sealed glue of modified polysulfide, the waterproof sealing adhesive tape of butyl rubber, omega rubber waterstop, the control formula machinery crab-bolt of expansion type moment of torsion, stainless steel metal pressing plate, polymer cement mortar and secondary lining structure.
The smooth surface of the externally-attached rubber waterstop is bonded on the primary lining structure by adopting a chloroprene adhesive, the convex part faces the inner arc surface of the primary lining structure, the externally-attached rubber waterstop is lapped by adopting a plane hot-pressing vulcanization method, a 50-100 mm solid part can exist at a joint at a middle hole, the joint is hollow, and a slot is cut at the bottom of the middle hole to extract a core, and then the core is bonded by using glue.
The secondary lining structure concrete deformation joint is pre-embedded with a closed-cell polyethylene foam board for reserving a groove and is also used as an end template during lining of the secondary lining structure.
And chiseling the closed-cell polyethylene foam board to a depth of 30-50 mm, and filling the modified polysulfide sealant to be tightly combined with the concrete on the side wall of the deformation joint.
The butyl rubber waterproof sealant has two layers, the first layer of butyl rubber waterproof sealant tape is used for bonding concrete on the inner wall of the groove at the deformation joint and the omega rubber water stop, and the second layer of butyl rubber waterproof sealant tape is used for bonding the omega rubber water stop and the stainless steel metal pressing plate.
The radian of the omega-shaped rubber water stop belt is 180 degrees, the diameter of the omega-shaped rubber water stop belt is the width of a deformation joint, and the semicircular bulge faces to the inner cambered surface of the secondary lining structure.
The stainless steel metal pressing plate is provided with round holes at fixed positions away from the edge, the round holes are distributed at equal intervals, and the stainless steel metal pressing plate and the omega-shaped rubber water stop are firmly connected through the expansion type torque control type mechanical anchor bolt.
The notch of the closed-cell polyethylene foam board groove is plugged by adopting a mode of galvanized electric welding steel wire mesh and polymer cement mortar, the polymer cement mortar is coated in two layers, the middle layer is provided with the steel wire mesh, and the steel wire mesh is connected with the stainless steel metal pressing plate through short steel bar electric welding by utilizing short bars.
The waterproof structure for the thin-wall two-lining deformation joint of the sewage tunnel is characterized in that the externally-attached rubber water stop, the butyl rubber waterproof sealing adhesive tape and the omega rubber water stop are all ethylene propylene diene monomer rubber.
The expansion type torque control type mechanical anchor bolt and the stainless steel metal pressing plate are both made of 304 stainless steel.
Generally, through the utility model discloses above technical scheme who conceives compares with prior art, can reach following beneficial effect: the utility model relates to a waterproof construction for sewage tunnel thin wall two lining movement joints can satisfy the waterproof requirement of secondary lining movement joint, especially under the sewage tunnel environment, and can make movement joint and sewage tunnel reach the integrated effect through waterproof construction, solved the problem of movement joint sewage exosmosis in the minor thickness secondary lining construction process;
drawings
The following detailed description of embodiments of the present invention is provided with reference to the accompanying drawings, in which:
FIG. 1 is a schematic view of the overall structure of a new waterproof structure of a thin-wall secondary-lining deformation joint of a sewage tunnel of the present invention;
FIG. 2 is an enlarged partial schematic view of FIG. 1;
FIG. 3 is an enlarged partial schematic view of FIG. 1;
in the figure: 1-external-sticking type rubber waterstop, 2-closed-cell type polyethylene foam board, 3-modified polysulfide sealant, 4-butyl rubber waterproof sealing tape, 5-omega rubber waterstop, 6-expansion type torque control type mechanical anchor bolt, 7-stainless steel metal pressing board, 8-polymer cement mortar, 9-primary lining structure, 10-secondary lining structure, 11-chloroprene adhesive and 12-cement-based permeable crystalline waterproof coating.
Detailed Description
As shown in fig. 1 to fig. 3, the overall structural schematic diagram and the partial enlarged schematic diagram of a new waterproof structure of a thin-wall two-lining deformation joint of a sewage tunnel are shown, and the waterproof structure comprises an externally-attached rubber water stop 1, a closed-cell polyethylene foam plate 2, an expansion type torque control type mechanical anchor bolt 6, a stainless steel metal pressing plate 7, polymer cement mortar 8 and a secondary lining structure 10.
The smooth surface of the externally-attached rubber waterstop 1 is bonded on the primary lining structure 9 by adopting a chloroprene adhesive 11, the convex part faces the inner arc surface of the primary lining structure 9, the externally-attached rubber waterstop 1 is lapped by adopting a plane hot-pressing vulcanization method, a joint at the middle hole position can have a 50-100 mm solid part, the joint is hollow, and a core is cut and extracted at the bottom of the middle hole and then bonded by using glue.
The closed-pore polyethylene foam plates 2 are pre-embedded in the concrete deformation joints of the secondary lining structure 10 and are used for reserving grooves, and the secondary lining structure 10 is also used as an end template during lining.
The closed-cell polyethylene foam plate 2 is chiseled to a depth of 30mm-50mm, and is filled with the modified polysulfide sealant 3 to be tightly combined with the concrete on the side wall of the deformation joint.
The butyl rubber waterproof sealing adhesive tape 4 has two layers, the first layer of butyl rubber waterproof sealing adhesive tape 4 is used for bonding groove inner wall concrete and the omega-shaped rubber water stop 5 at the deformation joint, and the second layer of butyl rubber waterproof sealing adhesive tape 4 is used for bonding the omega-shaped rubber water stop 5 and the stainless steel metal pressing plate 7.
The radian of the omega-shaped rubber water stop 5 omega-shaped part is 180 degrees, the diameter is the width of a deformation joint, and the semicircular bulge faces to the inner arc surface of the secondary lining structure 10.
The stainless steel metal pressing plate 7 is provided with round holes at fixed positions away from the edge, the round holes are distributed at equal intervals, and the stainless steel metal pressing plate 7 and the omega-shaped rubber water stop belt 5 are firmly connected through the expansion type torque control type mechanical anchor bolt 6.
The notch of 2 recesses of closed cell polyethylene foam board adopts the mode of galvanized electric welding wire net + polymer cement mortar 8 to block, and polymer cement mortar 8 coats in two-layer, and the intermediate level sets up the wire net, and the wire net utilizes short muscle and stainless steel metal pressing plate 7 to pass through the short steel bar electric welding and is connected.
Through the mutual cooperation of the materials, an effective and stable deformation joint waterproof sealing structure is formed, the integrity can be guaranteed under long-term sewage environment and external force impact, tearing and gaps caused by contraction or expansion of the deformation joint due to general external force and natural sedimentation are avoided, and the waterproof quality of the thin-wall two-lining deformation joint of the sewage tunnel is effectively improved.
Waterproof structure when carrying out tunnel construction, mainly satisfy secondary lining's deformation joint waterproof requirement through following construction steps, make deformation joint and sewage tunnel reach the effect of integration:
the method comprises the following steps: reserving a groove with the width of 220mm and the depth of 30mm at a deformation joint during secondary lining;
step two: the neoprene adhesive 11 is applied to the primary lining structure 9, and after waiting for about 20 minutes, the exterior rubber waterstop 1 is attached.
Step three: when the secondary lining structure 10 template is installed, pre-burying a closed-pore polyethylene foam plate 2 at a deformation joint position;
step four: chiseling a 40mm deep closed-cell polyethylene foam board 2, filling the modified polysulfide sealant 3, and brushing a cement-based permeable crystalline waterproof coating 12 at the groove of the deformation joint;
step five: finishing the pasting 4 of the first layer of butyl rubber waterproof sealing tape 4, the omega rubber water stop 5 and the second layer of butyl rubber waterproof sealing tape 4;
step six: stainless steel metal pressing plates 7 with the width of 100mm and the thickness of 5mm are respectively stuck on two sides, holes are formed in the grooves, and M10 expansion type torque control type mechanical anchor bolts 6 are installed;
step seven: utilize polymer cement mortar 8 shutoff recess, adopt reinforcing bar electric welding to link stainless steel metal to press 7 and stainless steel wire net piece, the processing of dabbing of movement joint recess side to increase the bonding of polymer cement mortar 8 and stainless steel metal clamp plate 7 and movement joint recess side.
The construction method is simple and convenient in process, compared with the traditional buried deformation joint structure construction process, the construction can be penetrated and followed in advance, the secondary lining construction is not influenced, the waterproof quality of the deformation joint is ensured, and the construction period can be shortened.
It will be understood by those skilled in the art that the foregoing is merely a preferred embodiment of the present invention, and is not intended to limit the invention, and that any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included within the scope of the present invention.
Claims (3)
1. A waterproof structure for a thin-wall secondary lining deformation joint of a sewage tunnel is characterized by comprising: the waterproof sealing structure comprises an externally-attached rubber waterstop (1), a closed-cell polyethylene foam board (2), a modified polysulfide sealant (3), a butyl rubber waterproof sealing tape (4), an omega rubber waterstop (5), an expansion type torque control type mechanical anchor bolt (6), a stainless steel metal pressing plate (7), polymer cement mortar (8) and a secondary lining structure (10);
the smooth surface of the externally-attached rubber waterstop (1) is bonded on the primary lining structure (9) by adopting a chloroprene adhesive (11), the convex part faces the inner arc surface of the primary lining structure (9), the externally-attached rubber waterstop (1) is lapped by adopting a plane hot-pressing vulcanization method, a joint at a middle hole has a 50-100 mm solid part, the joint is hollow, and a core is cut at the bottom of the middle hole and bonded by using glue after being extracted;
the concrete deformation joint of the secondary lining structure (10) is pre-embedded with a closed-cell polyethylene foam plate (2) for reserving a groove, and the secondary lining structure (10) is also used as an end template during lining;
the closed-cell polyethylene foam plate (2) is chiseled to a depth of 30-50 mm, and is filled with the modified polysulfide sealant (3) to be tightly combined with the concrete on the side wall of the deformation joint;
the butyl rubber waterproof sealing adhesive tape (4) is provided with two layers, the first layer of butyl rubber waterproof sealing adhesive tape (4) is used for bonding the concrete on the inner wall of the groove at the deformation joint and the omega rubber water stop (5), and the second layer of butyl rubber waterproof sealing adhesive tape (4) is used for bonding the omega rubber water stop (5) and the stainless steel metal pressing plate (7);
the radian of an omega-shaped rubber water stop (5) is 180 degrees, the diameter is the width of a deformation joint, and a semicircular bulge faces to the inner arc surface of the secondary lining structure (10);
round holes are punched at positions, which are far away from the edge and fixed, of the stainless steel metal pressing plate (7) and are distributed at equal intervals, and the stainless steel metal pressing plate (7) is firmly connected with the omega-shaped rubber water stop (5) through an expansion type torque control type mechanical anchor bolt (6);
the notch of the groove of the closed-cell polyethylene foam board (2) is plugged by adopting a mode of galvanized electric welding steel wire mesh and polymer cement mortar (8), the polymer cement mortar (8) is coated in two layers, the middle layer is provided with the steel wire mesh, and the steel wire mesh is connected with the stainless steel metal pressing plate (7) through short steel bar electric welding by utilizing short bars.
2. The waterproof structure for the thin-wall two-lining deformation joint of the sewage tunnel according to claim 1, wherein the externally-attached rubber water stop (1), the butyl rubber waterproof sealing tape (4) and the omega rubber water stop (5) are all ethylene propylene diene monomer rubber.
3. The waterproof structure for the thin-wall secondary-lining deformation joint of the sewage tunnel according to claim 1, wherein the expansion type torque control type mechanical anchor bolt (6) and the stainless steel metal pressure plate (7) are both made of 304 stainless steel.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021132240.4U CN212867583U (en) | 2020-06-17 | 2020-06-17 | Waterproof structure for thin-wall two-lining deformation joint of sewage tunnel |
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| CN202021132240.4U CN212867583U (en) | 2020-06-17 | 2020-06-17 | Waterproof structure for thin-wall two-lining deformation joint of sewage tunnel |
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| CN212867583U true CN212867583U (en) | 2021-04-02 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111663953A (en) * | 2020-06-17 | 2020-09-15 | 中建三局基础设施建设投资有限公司 | Waterproof structure for thin-wall secondary-lining deformation joint of sewage tunnel and construction method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111663953A (en) * | 2020-06-17 | 2020-09-15 | 中建三局基础设施建设投资有限公司 | Waterproof structure for thin-wall secondary-lining deformation joint of sewage tunnel and construction method |
| CN111663953B (en) * | 2020-06-17 | 2024-06-28 | 中建三局基础设施建设投资有限公司 | Waterproof structure for sewage tunnel thin-wall two-lining deformation joint and construction method |
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