CN109989788B - Drainage structure of tunnel short side wall drainage hole and construction method - Google Patents
Drainage structure of tunnel short side wall drainage hole and construction method Download PDFInfo
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- CN109989788B CN109989788B CN201910194273.7A CN201910194273A CN109989788B CN 109989788 B CN109989788 B CN 109989788B CN 201910194273 A CN201910194273 A CN 201910194273A CN 109989788 B CN109989788 B CN 109989788B
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- E21—EARTH DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F16/00—Drainage
- E21F16/02—Drainage of tunnels
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Abstract
The invention relates to a drainage structure of a tunnel low-profile wall drainage hole and a construction method, belonging to the technical field of tunnel engineering construction.A drainage hole is arranged at the bottom of the tunnel low-profile wall, the drainage hole is connected with a first drainage pipe through a side large-reducing three-way pipe, the first drainage pipe is connected with a main drainage pipe through an equal-diameter three-way pipe, and the right end of the first drainage pipe is also connected with a temporary drainage pipe; according to the drainage structure of the tunnel short side wall drain hole, the temporary drainage pipeline is arranged on the right side of the first drainage pipeline, so that temporary drainage can be performed at the initial building stage, auxiliary drainage can be performed at a period with a large water quantity, the concrete construction quality of a ditch cable trough is ensured, and the engineering defects of concrete segregation, subsequent seepage, water leakage and the like in the construction of the ditch cable trough are avoided.
Description
Technical Field
The invention belongs to the technical field of tunnel engineering construction, and particularly relates to a drainage structure of a short side wall drain hole of a tunnel and a construction method.
Background
In the excavation process of the tunnel, water gushing in the tunnel is one of the main difficulties in tunnel construction. When a ditch cable trough in a tunnel main tunnel is manufactured, as the water yield of a water drain hole on a part of secondary lining inverted arch short side wall is larger, the former construction method of 'blocking first and then passing' is not suitable for an integral type trough template, the pipe opening of the water drain hole is not tightly blocked, water leakage occurs when the water pressure in the pipe is too high after blocking, and various engineering defects such as separation of concrete during concrete pouring and subsequent inverted arch water leakage and water leakage are easily caused. Therefore, how to connect the drain holes in the short-side walls to the main-tunnel ditch is also a difficult and important engineering for the construction of the ditch cable trench at the water-rich section, and the connection of the drain holes in the ditch cable trench directly influences the construction quality of the ditch cable trench.
The 3# inclined shaft of the middle strip mountain tunnel penetrates through a limestone section at the positive hole, underground water develops, most of karst fracture water flows in a strand shape, enters the positive hole from the 3# inclined shaft in 3 months in 2017 to penetrate through a fracture water development section 85 at present, a small karst cave develops locally, and the pumping and drainage amount reaches up to 69000m3/d(2875m3H). The number of the low side walls in the pipe section is large, the water yield is high, and the construction difficulty of the cable trough of the ditch is high.
For example, the Chinese patent application number is: the patent of CN201510195760.7 discloses a drainage method in the process of tunnel construction through a water-rich broken zone. Water gushing on the tunnel face of the water tunnel is discharged to another tunnel by arranging the water guide structure on the spacing rock wall of the small clear distance tunnel, and the water discharge flow of the water gushing tunnel is increased. The method is based on the surrounding rock seepage field theory, the safe distance between the left tunnel and the right tunnel is kept when the small clear distance tunnel is excavated, the non-water-gushing tunnel is used as the water diversion tunnel to replace a drainage mode of arranging an independent water diversion tunnel, the problem that the independent water diversion tunnel needs to be arranged in tunnel construction under the condition of extra large water inflow of the mountain tunnel is solved, the tunnel construction period is shortened, the engineering cost is reduced, and the construction risk is reduced. But the invention is not suitable for the drainage of the tunnel short side wall drain hole.
Also, for example, the Chinese patent application number is: the patent of CN200810047843.1 discloses a transverse water collecting tank for an underwater tunnel, which comprises a left-line travelling vehicle tunnel, a right-line travelling vehicle tunnel and a service tunnel, and is characterized in that the transverse water collecting tank adopts a transverse water collecting channel, the transverse water collecting tank is arranged below the tunnels of the left-line travelling vehicle tunnel, the right-line travelling vehicle tunnel and the service tunnel, the axis of the transverse water collecting tank is vertical or approximately vertical to the axes of the left-line travelling vehicle tunnel, the right-line travelling vehicle tunnel and the service tunnel, side ditches are arranged in the left-line travelling vehicle tunnel and the right-line travelling vehicle tunnel, a vertical drainage pipe is arranged at the bottom of each side ditch, and a drainage pump house is arranged on the transverse water collecting tank. The invention can meet the requirement of uniformly collecting the waste water in a plurality of tunnels, the waste water is collected in one waste water pump room after the collection is finished, and the waste water is treated and discharged, thereby greatly reducing the engineering quantity, lowering the engineering cost, improving the water collection efficiency, simplifying the structure and the structure of a water collection system, and being suitable for the field of submarine or underwater tunnel construction engineering. Similarly, the invention is not suitable for the drainage of the drain hole of the tunnel low side wall.
Disclosure of Invention
The invention aims to provide a drainage structure of a short side wall drain hole of a tunnel and a construction method aiming at the defects of the prior art, so that the concrete construction quality of a ditch cable trough is ensured, and the engineering defects of concrete segregation, subsequent water seepage, water leakage and the like in the construction of the ditch cable trough are avoided.
A short side wall outlet drainage structures in tunnel includes as follows: the bottom of the short side wall is provided with drain holes, the aperture is 85mm, and the distance between the drain holes is 1.5 m; the water outlet is connected with a middle connector of the side large-reducing three-way pipe, and a side connector of the side large-reducing three-way pipe is connected with a first drainage pipeline; a temporary drainage pipeline is arranged on the right side of the first drainage pipeline; the first drainage pipeline is also connected with a side interface of the equal-diameter three-way pipe, and the middle interface of the equal-diameter three-way pipe is connected with the main drainage pipeline.
Further, the first drainage pipeline is a PVC pipe with the diameter of 100 mm.
Further, the temporary drainage pipeline is made of a fire hose.
Further, the main drainage pipeline is a PVC pipe with the diameter of 110 mm.
Further, first drainage pipe sets up in the ditch cable duct, highly is less than the weep hole outcrop height.
Furthermore, the diameter of the two side joints of the side large reducing tee pipe is 110mm, and the diameter of the middle joint is 75 mm.
Further, the interface diameter of the equal-diameter tee pipe is 110 mm.
The method for connecting the tunnel low-side wall drain hole and the main tunnel ditch comprises the following steps:
step 1.1, punching drain holes at the bottom of the short side wall by using a punching machine, wherein the hole diameter is 85mm, and the distance between the drain holes is 1.5 m; the elevation of the upper part of the drainage hole is 55cm below the rail surface, and the elevation of the lower part of the drainage hole is 60cm below the rail surface;
step 1.2, checking the edge of the drainage hole, and performing secondary cement building on the damaged position and the position filled with calcium; detecting and cleaning the blocked drain holes;
2.1, selecting a HDPE double-wall corrugated pipe with the diameter of 80mm, cutting the HDPE double-wall corrugated pipe into 300mm sections for later use, inwards bending pipe orifices at two ends of the double-wall corrugated pipe by 135 degrees, sleeving PVC pipes outside the pipe orifices of the double-wall corrugated pipe, connecting one end of each pipe orifice with a circumferential blind pipe in a lining of a main tunnel, and guiding effluent in a side wall of the main tunnel to a drain hole of a low side wall;
step 2.2, wrapping a waterproof adhesive tape with the thickness of 2.5mm outside the cut double-wall corrugated pipe;
step 2.3, arranging the double-wall corrugated pipe wrapped with the waterproof adhesive tape inside the water drainage hole, and spraying the waterproof adhesive at the interfaces at the two ends of the water drainage hole respectively for sealing;
step 3.1, selecting a side large reducing three-way pipe with the diameter of 110mm changed into 75mm, wrapping a 2.5mm waterproof adhesive tape outside a middle connector of the side large reducing three-way pipe, and connecting the double-wall corrugated pipe in the step 2;
3.2, communicating a PVC pipe with the diameter of 100mm with a side interface of the large-diameter side tee pipe in the step 3.1 to form a first drainage pipeline;
3.3, adopting a fire hose as a temporary drainage pipeline, wherein the right end of the first drainage pipeline is connected with the temporary drainage pipeline;
step 4.1, arranging a PVC pipe with the longitudinal phi of 110mm in the ditch cable trough as a main drainage pipeline;
step 4.2, selecting a phi 110mm equal-diameter three-way pipe, wherein two side interfaces of the equal-diameter three-way pipe are respectively connected to the first drainage pipeline, and the middle interface of the equal-diameter three-way pipe is connected with the main drainage pipeline;
further, in step 4.1, the ditch cable trough is built by adopting a ditch cable trough template, the ditch cable trough template is a group of 8m, the main drainage pipeline is arranged inside the ditch cable trough, and cement is adopted for building and filling.
Furthermore, the main drainage pipe is provided with an equal-diameter three-way pipe along two ends of the ditch cable trough template, and the middle part of the ditch cable trough template is additionally provided with 1-2 equal-diameter three-way pipes.
The invention has the beneficial effects that:
1. according to the drainage structure of the tunnel short side wall drain hole, the temporary drainage pipeline is arranged on the right side of the first drainage pipeline, so that temporary drainage can be performed at the initial building stage, and auxiliary drainage can be performed at the time of a large water amount.
2. According to the drainage structure of the drain hole of the tunnel low side wall, the pipeline is arranged for drainage, so that the concrete construction quality of the cable trench of the ditch is ensured, and the engineering defects of concrete segregation, subsequent seepage, water leakage and the like in the construction of the cable trench of the ditch are avoided.
Drawings
FIG. 1 is a schematic view of a drainage structure of a tunnel low-profile wall drainage hole according to the present invention;
FIG. 2 is a schematic structural view of a side large reducing three-way pipe of the drainage structure of the tunnel low-profile wall drainage hole of the invention;
FIG. 3 is a schematic structural view of an isometric three-way pipe of the drainage structure of the tunnel low-profile wall drainage hole of the invention;
FIG. 4 is a sectional view of a drainage structure of a drainage hole of a tunnel low-profile wall according to the present invention;
in the figure: 1-short side wall, 2-water outlet, 3-first water drainage pipeline, 4-main water drainage pipeline, 5-side large-reducing tee pipe, 6-equal-diameter tee pipe and 7-temporary water drainage pipeline.
Detailed Description
The invention is further described below with reference to the accompanying drawings.
As shown in fig. 1, the drainage structure of the tunnel short side wall drainage hole comprises the following components: the bottom of the short side wall 1 is provided with drain holes 2, the aperture is 85mm, and the distance between the drain holes 2 is 1.5 m; the water outlet 2 is connected with a middle interface of the side large-reducing three-way pipe 5, and a side interface of the side large-reducing three-way pipe 5 is connected with the first drainage pipeline 3; a temporary drainage pipeline 7 is arranged on the right side of the first drainage pipeline 3; the first drainage pipeline 3 is also connected with a side interface of the equal-diameter three-way pipe 6, and the middle interface of the equal-diameter three-way pipe 6 is connected with the main drainage pipeline 4.
Further, the first drainage pipe 3 is a PVC pipe having a diameter of 100 mm.
Further, the temporary drainage pipeline 7 is made of a fire hose.
Further, the main drainage pipe 4 is a PVC pipe with a diameter of 110 mm.
Further, first drainage pipe 3 sets up in the ditch cable duct, highly is less than 2 outcrop height of outlet.
Furthermore, the diameter of the two side joints of the side large reducing tee pipe 5 is 110mm, and the diameter of the middle joint is 75 mm.
Further, the diameter of the interface of the equal-diameter tee 6 is 110 mm.
The method for connecting the tunnel low-side wall drain hole and the main tunnel ditch comprises the following steps:
step 1.1, punching drain holes 2 at the bottom of the short side wall 1 by using a punching machine, wherein the hole diameter is 85mm, and the distance between the drain holes 2 is 1.5 m; the elevation of the upper part of the drainage hole 2 is 55cm below the rail surface, and the elevation of the lower part of the drainage hole 2 is 60cm below the rail surface;
step 1.2, checking the edge of the water drainage hole 2, and performing secondary cement building on the damaged position and the position filled with calcium; detecting and cleaning the blocked water drainage holes 2;
2.1, selecting a HDPE double-wall corrugated pipe with the diameter of 80mm, cutting the HDPE double-wall corrugated pipe into 300mm sections for later use, inwards bending pipe orifices at two ends of the double-wall corrugated pipe by 135 degrees, sleeving PVC pipes outside the pipe orifices of the double-wall corrugated pipe and connecting the PVC pipes with a circumferential blind pipe in a lining of a main tunnel, and guiding effluent in a side wall of the main tunnel to a drain hole 2 of a short side wall 1;
step 2.2, wrapping a waterproof adhesive tape with the thickness of 2.5mm outside the cut double-wall corrugated pipe;
step 2.3, arranging the double-wall corrugated pipe wrapped with the waterproof adhesive tape inside the water escape hole 2, and spraying waterproof adhesive to the interfaces at the two ends of the water escape hole 2 respectively for sealing;
step 3.1, selecting a side large reducing three-way pipe 5 with the diameter of 110mm changed into 75mm, wrapping a 2.5mm waterproof adhesive tape outside a middle connector of the side large reducing three-way pipe 5, and connecting the double-wall corrugated pipe in the step 2;
step 3.2, communicating a side interface of the large-diameter side tee pipe 5 in the step 3.1 by adopting a PVC pipe with the diameter of 100mm to form a first drainage pipeline 3;
3.3, adopting a fire hose as a temporary drainage pipeline 7, wherein the right end of the first drainage pipeline 3 is connected with the temporary drainage pipeline 7;
step 4.1, arranging a PVC pipe with the longitudinal phi of 110mm in the cable trough of the ditch as a main drainage pipeline 4;
step 4.2, selecting a phi 110mm equal-diameter three-way pipe 6, wherein two side interfaces of the equal-diameter three-way pipe 6 are respectively connected to the first drainage pipeline 3, and the middle interface of the equal-diameter three-way pipe 6 is connected with the main drainage pipeline 4;
further, in step 4.1, the ditch cable duct is built by adopting a ditch cable duct template, the ditch cable duct template is a group of 8m, the main drainage pipeline 4 is arranged inside the ditch cable duct, and cement is adopted for building and filling.
Furthermore, the main drainage pipe is provided with equal-diameter three-way pipes 6 along two ends of the ditch cable trough template, and the middle part of the ditch cable trough template is additionally provided with 1-2 equal-diameter three-way pipes 6.
Before the trench cable trough is demoulded, water in the short side wall 1 flows into the first drainage pipeline 3 through the side large-reducing three-way pipe 5 and flows out through the temporary drainage pipe at the right end of the first drainage pipeline 3 as shown in fig. 4. After the cable trough of the ditch is demolded, the water in the short side wall 1 flows into the first drainage pipeline 3 through the side large reducing three-way pipe 5, and flows into the main drainage pipeline 4 through the equal-diameter three-way pipe 6 to flow out.
The first stage is as follows: the water flowing out of the drain hole 2 of the short side wall 1 flows out of the temporary drainage pipeline 7 through the side large-reducing three-way pipe 5 and the first drainage pipeline 3; and a second stage: the water flowing out of the drain hole 2 of the short side wall 1 flows out of the middle connector of the equal-diameter three-way pipe 6 to the main drain pipe 4 through the side large-diameter three-way pipe 5 and the first drain pipe 3 and is discharged.
Although the present invention has been described with reference to the accompanying drawings, it will be understood by those skilled in the art that various changes and modifications may be made in the parameters of the present invention without departing from the scope and spirit of the invention. It is to be understood, therefore, that the above-described embodiments are not to be taken in a limiting sense, but are to be construed in all aspects as illustrative.
Claims (5)
1. The utility model provides a short side wall outlet drainage structures in tunnel which characterized in that includes as follows: the short side wall is provided with drain holes at the bottom, the diameter of each drain hole is 85mm, the distance between every two drain holes is 1.5m, the drain holes are connected with a middle interface of a side large-reducing three-way pipe, a side interface of the side large-reducing three-way pipe is connected with a first drainage pipeline, the diameter of the interfaces on two sides of the side large-reducing three-way pipe is 110mm, the diameter of the middle interface of the side large-reducing three-way pipe is 75mm, a temporary drainage pipeline is arranged on the right side of the first drainage pipeline, the temporary drainage pipeline is made of fire hoses, the side interface of an equal-diameter three-way pipe is further connected onto the first drainage pipeline, the diameter of the interface of the equal-diameter three-way pipe is 110mm, the middle interface of the equal-diameter three-way pipe.
2. The tunnel low side wall weep hole drainage structure of claim 1, wherein the first drainage conduit is arranged in the trench cable trench at a height lower than the outcropping height of the weep hole.
3. A construction method of a drainage structure of a tunnel short side wall drainage hole is characterized by comprising the following steps:
step 1, setting a short side wall drain hole:
step 1.1, punching drain holes at the bottom of the short side wall by using a punching machine, wherein the hole diameter is 85mm, and the distance between the drain holes is 1.5 m; the elevation of the upper part of the drainage hole is 55cm below the rail surface, and the elevation of the lower part of the drainage hole is 60cm below the rail surface;
step 1.2, checking the edge of the drainage hole, and performing secondary cement building on the damaged position and the position filled with calcium; detecting and cleaning the blocked drain holes;
step 2, arranging a double-wall corrugated pipe:
2.1, selecting a HDPE double-wall corrugated pipe with the diameter of 80mm, cutting the HDPE double-wall corrugated pipe into 300mm sections for later use, inwards bending pipe orifices at two ends of the double-wall corrugated pipe by 135 degrees, sleeving PVC pipes outside the pipe orifices of the double-wall corrugated pipe, connecting one end of each pipe orifice with a circumferential blind pipe in a lining of a main tunnel, and guiding effluent in a side wall of the main tunnel to a drain hole of a low side wall;
step 2.2, wrapping a waterproof adhesive tape with the thickness of 2.5mm outside the cut double-wall corrugated pipe;
step 2.3, arranging the double-wall corrugated pipe wrapped with the waterproof adhesive tape inside the water drainage hole, and spraying the waterproof adhesive at the interfaces at the two ends of the water drainage hole respectively for sealing;
step 3, arranging a water outlet pipeline:
step 3.1, selecting a side large reducing three-way pipe with the diameter of 110mm changed into 75mm, wrapping a 2.5mm waterproof adhesive tape outside a middle connector of the side large reducing three-way pipe, and connecting the double-wall corrugated pipe in the step 2;
3.2, communicating a PVC pipe with the diameter of 100mm with a side interface of the large-diameter side tee pipe in the step 3.1 to form a first drainage pipeline;
3.3, adopting a fire hose as a temporary drainage pipeline, wherein the right end of the first drainage pipeline is connected with the temporary drainage pipeline;
step 4, setting a main drainage pipeline:
step 4.1, arranging a PVC pipe with the longitudinal phi of 110mm in the ditch cable trough as a main drainage pipeline;
and 4.2, selecting a phi 110mm equal-diameter three-way pipe, wherein two side interfaces of the equal-diameter three-way pipe are respectively connected to the first drainage pipeline, and the middle interface of the equal-diameter three-way pipe is connected with the main drainage pipeline.
4. The method for constructing a drainage structure of a tunnel low side wall drainage hole as claimed in claim 3, wherein in the step 4.1, the trench cable groove is built by using trench cable groove formworks, the trench cable groove formworks are in 8m groups, and the main drainage pipeline is arranged inside the trench cable groove and is buried by using cement building.
5. The construction method of the drainage structure of the tunnel low side wall drain hole according to claim 3, wherein the main drainage pipe is provided with a three-way pipe with equal diameter along two ends of the cable trough formwork of the ditch, and 1-2 three-way pipes with equal diameter are additionally arranged in the middle of the cable trough formwork of the ditch.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910194273.7A CN109989788B (en) | 2019-03-14 | 2019-03-14 | Drainage structure of tunnel short side wall drainage hole and construction method |
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| CN201910194273.7A CN109989788B (en) | 2019-03-14 | 2019-03-14 | Drainage structure of tunnel short side wall drainage hole and construction method |
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| CN109989788B true CN109989788B (en) | 2021-05-18 |
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Citations (5)
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|---|---|---|---|---|
| CH697239B1 (en) * | 2004-01-17 | 2008-07-31 | Marcel Christian Wegmueller | Preventing deposits in tunnel constructions, comprises mixing water conditioning agent to the mountain water in secondary part of drainage system and conducting mountain water to primary drainage system |
| CN101798939A (en) * | 2010-03-17 | 2010-08-11 | 中铁隧道勘测设计院有限公司 | Maintainable tunnel drainage system |
| CN204511513U (en) * | 2015-03-05 | 2015-07-29 | 西安科技大学 | A kind of tunnel drainage blind pipe syndeton |
| CN205618199U (en) * | 2016-05-05 | 2016-10-05 | 中铁第一勘察设计院集团有限公司 | Prefabricated cable pipe and prefabricated drain pipe structure in tunnel |
| KR20180057428A (en) * | 2016-11-22 | 2018-05-30 | 건국대학교 산학협력단 | Backflow prevention cover and backflow prevention apparatus comprising the same |
-
2019
- 2019-03-14 CN CN201910194273.7A patent/CN109989788B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CH697239B1 (en) * | 2004-01-17 | 2008-07-31 | Marcel Christian Wegmueller | Preventing deposits in tunnel constructions, comprises mixing water conditioning agent to the mountain water in secondary part of drainage system and conducting mountain water to primary drainage system |
| CN101798939A (en) * | 2010-03-17 | 2010-08-11 | 中铁隧道勘测设计院有限公司 | Maintainable tunnel drainage system |
| CN204511513U (en) * | 2015-03-05 | 2015-07-29 | 西安科技大学 | A kind of tunnel drainage blind pipe syndeton |
| CN205618199U (en) * | 2016-05-05 | 2016-10-05 | 中铁第一勘察设计院集团有限公司 | Prefabricated cable pipe and prefabricated drain pipe structure in tunnel |
| KR20180057428A (en) * | 2016-11-22 | 2018-05-30 | 건국대학교 산학협력단 | Backflow prevention cover and backflow prevention apparatus comprising the same |
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| CN109989788A (en) | 2019-07-09 |
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