CN205370643U - A drainage structures before secondary lining for undercut tunnel - Google Patents
A drainage structures before secondary lining for undercut tunnel Download PDFInfo
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- CN205370643U CN205370643U CN201620162537.2U CN201620162537U CN205370643U CN 205370643 U CN205370643 U CN 205370643U CN 201620162537 U CN201620162537 U CN 201620162537U CN 205370643 U CN205370643 U CN 205370643U
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- drainage
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- drainage duct
- lining cutting
- lining
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Abstract
The utility model discloses a drainage structures before secondary lining for undercut tunnel, including first lining cutting first lining cutting bottom surface upper berth is equipped with the drainage layer, and it is in place at the drainage along the axis direction setting in tunnel to drive the drainage pipe that has a plurality of apertures on the outer wall, still including installing the water -stop sheet in drainage layer top. Through first lining cutting and permeate and to pass through pulling of drainage pipe to the ponding of secondary lining bottom and discharged, the drainage layer be then can avoid the solid phase to block up the drainage pipe silt that produces when the excavating solid -liquid mixture hierarchy treatment with groundwater, the efficiency of improvement drainage.
Description
Technical field
This utility model relates to constructing tunnel field, is specifically related to bored tunnel base plate drainage sunk well structure.
Background technology
Tunnel is to build in underground or under water or in massif, places an iron railway or builds highway for the current building of motor vehicles.Mountain tunnel, submerged tunnel and city tunnel three major types can be divided into: for reducing the distance and avoid steep gradient and being called mountain tunnel from what pass through the mountain ridge or hills according to its position；For river crossing or straits from river or seabed pass through be called submerged tunnel；It is called city tunnel by metropolitan needs what Urban Underground passed through for adapting to railway.
After tunnel excavation, for making adjoining rock stability, it is ensured that operation security, need to building one layer of supporting construction with sufficient intensity by certain overall size, this tunnel support structure is called tunnel-liner.Conventional lining cutting kind has concrete perfusion class, prefabricated section assembly, spray anchor or single spraying concrete, composite lining on the spot.And it is directed to the geologic structure that water content is abundant, composite lining is then adopted during constructing tunnel, composite lining refers to point tunnel-liner that inside and outside two-layer successively applies, secondary lining including the first lining cutting of outer layer and internal layer, and the Second Lining Construction in tunnel must keep tunnel drying, the safety of guarantee constructing tunnel and quality.Owing to geologic structure is complicated, groundwater source is abundant, survey that data are inaccurate, the reason such as rainy season construction, dewatering well dewatering effect are undesirable, during the first lining construction in often tunnel, there will be the situation that subsoil water hydrops is more in tunnel, significantly delay the construction speed of secondary lining.
Utility model content
The purpose of this utility model is in that to provide bored tunnel base plate drainage sunk well structure, realize in the bored tunnel of rich groundwater dewatering well dewatering effect undesirable or because of execution conditions cannot be carried out dewatering well construction, energy effective drainage subsoil water also blocks in terminal, it is ensured that tunnel inner drying.
This utility model is achieved through the following technical solutions:
Bored tunnel base plate drainage sunk well structure, including first lining cutting, described first lining cutting bottom surface is equipped with drainage layer, outer wall has the drainage duct of multiple aperture and is arranged in drainage layer along the axis direction in tunnel, also include being arranged on the water-stop sheet above drainage layer.In prior art, the abundant tunnel of water content is when excavating, not only due to the dewatering effect of dewatering well is undesirable and cause accumulation substantial amounts of water tunnel in, also as ooze out substantial amounts of hydrops on lining cutting bottom surface for the first time, make to cannot be carried out in tunnel next step construction, serious slow project progress；And the location that this utility model enriches for water content when using, when adopting composite lining, first lay respectively on first lining cutting bottom surface and after pre-buried good drainage layer and drainage duct, again water-stop sheet is placed on drainage layer, finally carry out secondary lining again, make the hydrops remaining between first lining cutting and secondary lining under the filter effect of drainage layer, be quickly discharged tunnel by drainage duct, it is ensured that drying of secondary lining bottom surface.Further, infiltrate into the hydrops bottom secondary lining can be discharged through the traction of drainage duct through first lining cutting；Drainage layer then can by the solidliquid mixture layered shaping of the silt produced when excavating and subsoil water, it is to avoid drainage duct is blocked by solid phase, improves the efficiency of draining.
Described drainage layer includes rock layers in small, broken bits and the coarse crushing rock layers from top to bottom laid successively.Drainage layer is mainly used in the solidliquid mixture penetrated on first lining cutting bottom surface is filtered cleaning, after avoiding substantial amounts of silting, drainage duct inside is resulted in blockage, and mud can successively be processed by rock layers in small, broken bits and coarse crushing rock layers, ensure that the aperture that will not flow through on drainage duct outer wall with water for the sandstone filtered is discharged simultaneously.
The number at least two of described drainage duct.The number of drainage duct is arranged on two or two or more, to ensure that on first lining cutting bottom surface, the outer row of hydrops can keep consistent with the progress of infiltration, facilitates the construction of secondary lining.
Described first lining cutting bottom surface is circular arc.As preferably, the bottom surface of first lining cutting being set to circular arc so that leaving a cavity between lining cutting and secondary lining for the first time, the hydrops of infiltration can directly be temporarily stored in this cavity, finally put together by the unified outer row of drainage duct.
Described aperture includes the lower opening on the lower half circle side face of upper hole and the drainage duct being arranged on the upper semi-circle side face of drainage duct, and the aperture in upper hole is less than the aperture of lower opening.It is embedded in the drainage duct in drainage layer and mainly includes two parts, upper semi-circle part and lower half circle part, relatively small upper hole, aperture is arranged on upper semi-circle part, can to the upper strata hydrops after rock layers in small, broken bits filters first is fed directly in drainage duct, and the bigger lower opening in aperture is arranged in lower half circle part, can the lower floor's hydrops that filter through coarse crushing rock layers be fed directly in drainage duct, by hydrops levels is collected simultaneously, the efficiency making the outer row of hydrops is greatly improved, reduce the workload of dewatering well, serious consequence when dewatering well dewatering effect can be prevented undesirable, improve the efficiency of construction of tunnel excavation.
Described drainage duct is arranged at intervals with multiple reducing, and the internal diameter of described reducing is less than the internal diameter of drainage duct.In the mud produced in tunnelling process, crystallization easily occurs when calcareous content is more inside drainage duct, drainage efficiency in drainage duct is substantially reduced, and spaced multiple reducings on the drainage duct in this utility model, make on drainage duct, form multiple stream section, and what is called reducing refers to that the internal diameter size of this part is little with the internal diameter of the non-reducing part on drainage duct, namely at hydrops in the process of row outside the axis direction of drainage duct, its flow velocity is unbalanced, more slow at the flow velocity of non-choke office hydrops, the easy crystallization of calcium compound in hydrops；And can suddenly accelerate at hydrops its flow velocity when the runner suddenly reduced by unit are of reducing part specific discharge, namely relatively improved by the flow velocity of second section after first is flowed section at hydrops, the calcium compound that partially crystallizable can be attached on inside pipe wall by the hydrops improving flowing velocity washes away totally, it is ensured that drainage duct inner wall smooth.
This utility model compared with prior art, has such advantages as and beneficial effect:
1, in this utility model, infiltrate into the hydrops bottom secondary lining can be discharged through the traction of drainage duct through first lining cutting；Drainage layer then can by the solidliquid mixture layered shaping of the silt produced when excavating and subsoil water, it is to avoid drainage duct is blocked by solid phase, improves the efficiency of draining；
2, the bottom surface of first lining cutting is set to circular arc by this utility model so that leaving a cavity between lining cutting and secondary lining for the first time, the hydrops of infiltration can directly be temporarily stored in this cavity, finally puts together by the unified outer row of drainage duct；
3, this utility model can be accelerated suddenly at hydrops its flow velocity when the runner suddenly reduced by unit are of reducing part specific discharge, namely relatively improved by the flow velocity of second section after first is flowed section at hydrops, the calcium compound that partially crystallizable can be attached on inside pipe wall by the hydrops improving flowing velocity washes away totally, it is ensured that drainage duct inner wall smooth.
Accompanying drawing explanation
Accompanying drawing described herein is used for providing being further appreciated by this utility model embodiment, constitutes the part of the application, is not intended that the restriction to this utility model embodiment.In the accompanying drawings:
Fig. 1 is this utility model structural representation；
Fig. 2 is the structural representation of drainage duct.
The parts title of labelling and correspondence in accompanying drawing:
The first lining cutting of 1-, 2-secondary lining, 3-tunnel, 4-water-stop sheet, 5-drainage duct, 51-reducing, the upper hole of 52-, 53-lower opening, 6-drainage layer.
Detailed description of the invention
For making the purpose of this utility model, technical scheme and advantage clearly understand, below in conjunction with embodiment and accompanying drawing, the utility model is described in further detail, exemplary embodiment of the present utility model and explanation thereof are only used for explaining this utility model, are not intended as restriction of the present utility model.
Embodiment 1
As shown in Figure 1, the present embodiment includes first lining cutting 1, described first lining cutting 1 bottom surface is equipped with drainage layer 6, outer wall has the drainage duct 5 of multiple aperture and is arranged in drainage layer 6 along the axis direction in tunnel 3, also include the water-stop sheet 4 being arranged on above drainage layer 6.
In prior art, the abundant tunnel 3 of water content is when excavating, not only due to the dewatering effect of dewatering well is undesirable and cause accumulating in tunnel 3 substantial amounts of water, also as ooze out substantial amounts of hydrops on first lining cutting 1 bottom surface, make to cannot be carried out in tunnel 3 next step construction, serious slow project progress；For the location that water content is abundant during use, when adopting composite lining, first lay respectively on first lining cutting 1 bottom surface and after pre-buried good drainage layer 6 and drainage duct 5, again water-stop sheet 4 is placed on drainage layer 6, finally carry out secondary lining 2 again, make the hydrops remaining between first lining cutting 1 and secondary lining 2 under the filter effect of drainage layer 6, be quickly discharged tunnel 3 by drainage duct 5, it is ensured that drying of secondary lining 2 bottom surface.Further, infiltrate into the hydrops bottom secondary lining 2 can be discharged through the traction of drainage duct 5 through first lining cutting 1；Drainage layer 6 then can by the solidliquid mixture layered shaping of the silt produced when excavating and subsoil water, it is to avoid drainage duct 5 is blocked by solid phase, improves the efficiency of draining.
Drainage layer 6 is mainly used in the solidliquid mixture penetrated on first lining cutting 1 bottom surface is filtered cleaning, result in blockage to drainage duct 5 is internal after avoiding substantial amounts of silting, and mud can successively be processed by rock layers in small, broken bits and coarse crushing rock layers, ensure that the aperture that will not flow through with water on drainage duct 5 outer wall for the sandstone filtered is discharged simultaneously.
As preferably, the number of drainage duct 5 being arranged on two or two or more, to ensure that on first lining cutting 1 bottom surface, the outer row of hydrops can keep consistent with the progress of infiltration, facilitates the construction of secondary lining 2.
As preferably, the bottom surface of first lining cutting 1 being set to circular arc so that leaving a cavity between lining cutting 1 and secondary lining 2 for the first time, the hydrops of infiltration can directly be temporarily stored in this cavity, finally put together by the unified outer row of drainage duct 5.
Embodiment 2
As in figure 2 it is shown, aperture described in this enforcement includes the lower opening 53 on the lower half circle side face of upper the hole 52 and drainage duct 5 being arranged on the upper semi-circle side face of drainage duct 5, and the aperture in upper hole 52 is less than the aperture of lower opening 53；Described drainage duct 5 is arranged at intervals with multiple reducing 51, and the internal diameter of described reducing 51 is less than the internal diameter of drainage duct 5.
The drainage duct 5 being embedded in drainage layer 6 mainly includes two parts, upper semi-circle part and lower half circle part, relatively small upper hole 52, aperture is arranged on upper semi-circle part, can to the upper strata hydrops after rock layers in small, broken bits filters first is fed directly in drainage duct 5, and the bigger lower opening 53 in aperture is arranged in lower half circle part, can the lower floor's hydrops that filter through coarse crushing rock layers be fed directly in drainage duct 5, by hydrops levels is collected simultaneously, the efficiency making the outer row of hydrops is greatly improved, reduce the workload of dewatering well, serious consequence when dewatering well dewatering effect can be prevented undesirable, improve the efficiency of construction of tunnel 3 tunneling.
In the mud produced in tunnel 3 mining process, easily inside drainage duct 5, crystallization occurs when calcareous content is more, drainage efficiency in drainage duct 5 is substantially reduced, and spaced multiple reducings 51 on the drainage duct 5 in this utility model, make on drainage duct 5, form multiple stream section, and what is called reducing 51 refers to that the internal diameter size of this part is little with the internal diameter of non-reducing 51 part on drainage duct 5, namely in the process that hydrops is arranged outside the axis direction along drainage duct 5, its flow velocity is unbalanced, more slow at the flow velocity of non-reducing 51 part place hydrops, the easy crystallization of calcium compound in hydrops；And can suddenly accelerate at hydrops its flow velocity when the runner suddenly reduced by unit are of reducing 51 fractional unit flow, namely relatively improved by the flow velocity of second section after first is flowed section at hydrops, the calcium compound that partially crystallizable can be attached on inside pipe wall by the hydrops improving flowing velocity washes away totally, it is ensured that drainage duct 5 inner wall smooth.
Above-described detailed description of the invention; the purpose of this utility model, technical scheme and beneficial effect have been further described; it is it should be understood that; the foregoing is only detailed description of the invention of the present utility model; it is not used to limit protection domain of the present utility model; all within spirit of the present utility model and principle, any amendment of making, equivalent replacement, improvement etc., should be included within protection domain of the present utility model.
Claims (6)
1. bored tunnel base plate drainage sunk well structure, including first lining cutting (1), it is characterized in that: on described first lining cutting (1) bottom surface, be equipped with drainage layer (6), outer wall has the drainage duct (5) of multiple aperture be arranged in drainage layer (6) along the axis direction of tunnel (3), also include the water-stop sheet (4) being arranged on drainage layer (6) top.
2. bored tunnel base plate drainage sunk well structure according to claim 1, it is characterised in that: described drainage layer (6) includes rock layers in small, broken bits and the coarse crushing rock layers from top to bottom laid successively.
3. bored tunnel base plate drainage sunk well structure according to claim 1, it is characterised in that: the number at least two of described drainage duct (5).
4. bored tunnel base plate drainage sunk well structure according to claim 1, it is characterised in that: described first lining cutting (1) bottom surface is circular arc.
5. the bored tunnel base plate drainage sunk well structure according to claim 1 or 3, it is characterized in that: described aperture includes the lower opening (53) on the lower half circle side face of upper hole (52) and the drainage duct (5) being arranged on the upper semi-circle side face of drainage duct (5), and the aperture of upper hole (52) is less than the aperture of lower opening (53).
6. bored tunnel base plate drainage sunk well structure according to claim 5, it is characterised in that: on described drainage duct (5), it is arranged at intervals with multiple reducing (51), and the internal diameter of described reducing (51) is less than the internal diameter of drainage duct (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620162537.2U CN205370643U (en) | 2016-03-04 | 2016-03-04 | A drainage structures before secondary lining for undercut tunnel |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620162537.2U CN205370643U (en) | 2016-03-04 | 2016-03-04 | A drainage structures before secondary lining for undercut tunnel |
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| CN205370643U true CN205370643U (en) | 2016-07-06 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105545356A (en) * | 2016-03-04 | 2016-05-04 | 中国五冶集团有限公司 | Drainage treatment structure of concealed excavated tunnel base plate |
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2016
- 2016-03-04 CN CN201620162537.2U patent/CN205370643U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105545356A (en) * | 2016-03-04 | 2016-05-04 | 中国五冶集团有限公司 | Drainage treatment structure of concealed excavated tunnel base plate |
| CN105545356B (en) * | 2016-03-04 | 2018-02-13 | 中国五冶集团有限公司 | Bored tunnel bottom plate drainage sunk well |
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