CN104372749B - The drainage system of cut type open cut tunnel structure - Google Patents
The drainage system of cut type open cut tunnel structure Download PDFInfo
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- CN104372749B CN104372749B CN201410680178.5A CN201410680178A CN104372749B CN 104372749 B CN104372749 B CN 104372749B CN 201410680178 A CN201410680178 A CN 201410680178A CN 104372749 B CN104372749 B CN 104372749B
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- drainage
- open cut
- tunnel
- cut tunnel
- slope
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01F—ADDITIONAL WORK, SUCH AS EQUIPPING ROADS OR THE CONSTRUCTION OF PLATFORMS, HELICOPTER LANDING STAGES, SIGNS, SNOW FENCES, OR THE LIKE
- E01F5/00—Draining the sub-base, i.e. subgrade or ground-work, e.g. embankment of roads or of the ballastway of railways or draining-off road surface or ballastway drainage by trenches, culverts, or conduits or other specially adapted means
- E01F5/005—Culverts ; Head-structures for culverts, or for drainage-conduit outlets in slopes
Abstract
The present invention relates to a kind of drainage system of cut type open cut tunnel structure, arrange upper and lower two charge for remittance conduits in open cut tunnel backfill layer, every bar charge for remittance conduit comprises a longitudinal drainage pipe and the fixed pedestal for fixing longitudinal drainage pipe; Between two longitudinal drainage pipes, interval is furnished with the horizontal aqueduct of multiple tracks, and longitudinal drainage pipe top loop is to being provided with multiple inlet opening; Draining filtering layer is also provided with between backfill rock layers and side wall backfill layer; Be furnished with two rows along tunnel longitudinal separation in side slope and face upward oblique drain hole; Side wall backfill layer end face is provided with transverse drainage slope.The present invention is on the basis of traditional open cut tunnel drainage system, change and be close to the drainage pattern that open cut tunnel lining cutting arranges dewatering installation, by arranging charge for remittance conduit, longitudinal drainage pipe, concrete pedestal, facing upward oblique drain hole, draining filtering layer and transverse drainage slope etc., the great drainage effect improving lining cutting behind, the draining drawback solving current mountain tunnel open cut tunnel lining cutting behind of system.
Description
Technical field
The present invention relates to light cave design and the technical field of construction of highway, railway and municipal mountain tunnel, be specifically related to a kind of drainage system of cut type open cut tunnel structure.
Background technology
Open cut tunnel in cutting or side-hill fill, builds liner structure with cut and cover method, and in the tunnel of its appearance backfill stone.Open cut tunnel is mainly used in suffering caving in, falling rocks or flowstone, the tunnel portal of stream mud harm or cutting location, be the designs such as highway, railway and municipal mountain tunnel and construction time common structure.
At present, the lining cutting draining behind of mountain tunnel open cut tunnel is arranged vertically and longitudinal gutter that punches often through being close to open-cut tunnel structure outer rim, then ditch in transverse drain ejectment to hole is set, but often cause lining cutting Yong water behind because construction is not good at, open cut tunnel backfill is even caused to run off, form cavity, stressed unfavorable to open cut tunnel liner structure.The disadvantage of this drainage pattern is mainly:
(1) longitudinal drainage pipe is embedded in backfill, and backfill construction is often coarse, gutter cracky or block up;
(2) longitudinal drainage pipe is easily extruded when constructing, thus causes gutter flexural deformation, impeded drainage;
(3) open cut side slope is loose, the rock crushing of soil layer often, ooze under surface rain, lining cutting is come together in behind along domatic, if impeded drainage, then affect slope stability, cause that open-cut tunnel structure is stressed to change, likely cause open-cut tunnel structure to bear hydraulic pressure, the diseases such as open-cut tunnel structure cracking, percolating water after accumulating over a long period, will be caused.
Therefore the drainage system designing a kind of cut type open cut tunnel structure is necessary, to overcome the problems referred to above.
Summary of the invention
The object of the invention is to the defect overcoming prior art, provide a kind of drainage system of cut type open cut tunnel structure, effectively improve reliability and the construction conveniency of mountain tunnel open cut tunnel lining cutting draining behind.
The present invention is achieved in that
The invention provides a kind of drainage system of cut type open cut tunnel structure, draining is carried out behind for the lining cutting at cut-and-cover tunnel, described open cut tunnel lining cutting both sides or be one-sidedly provided with side slope, are furnished with backfill rock layers, side wall backfill layer and foundation backfill layer from top to bottom between described open cut tunnel and side slope all successively.Described side wall backfill layer and foundation backfill layer end face one end, slope of keeping to the side longitudinally is respectively equipped with a charge for remittance conduit along tunnel, every bar charge for remittance conduit comprise be located at bottom fixed pedestal, be fixed on the longitudinal drainage pipe on described fixed pedestal and be located at the pervious layer on top; Between two longitudinal drainage pipes, interval is furnished with the horizontal aqueduct that many connect described two longitudinal drainage pipes, and described longitudinal drainage pipe top loop is to being provided with multiple inlet opening; Draining filtering layer is also provided with between described backfill rock layers and side wall backfill layer.
Further, be furnished with multiple tracks along tunnel longitudinal separation in the side slope at described every bar charge for remittance conduit place and face upward oblique drain hole.
Further, described in face upward oblique drain hole the elevation angle be 10 ~ 15 °, the described adjacent twice distance of facing upward between oblique drain hole is 3 ~ 5m.
Further, described side wall backfill layer end face is provided with transverse drainage slope, and described transverse drainage slope is extended to side slope by open cut tunnel.
Further, described longitudinal drainage pipe top is arranged circumferentially each inlet opening within the scope of 120 ° ~ 180 °.
Further, the distance between the horizontal aqueduct of described adjacent twice is 5 ~ 10m.
Further, described draining filtering layer is piled up by non-fine concrete or sandy gravel and is formed.
Further, described draining thickness of filter bed is 40 ~ 60cm.
Further, described fixed pedestal is concrete pedestal or cement mortar pedestal.
Further, be longitudinally provided with multiple tracks transverse row water-band at described side slope surface along tunnel, described each transverse row water-band and each horizontal aqueduct transpostion interval are arranged, each transverse row water-band is connected with bottom charge for remittance conduit respectively.
The present invention has following beneficial effect: by arranging upper and lower two charge for remittance conduits in the backfill layer of open cut tunnel both sides, with fixing longitudinal drainage pipe, and protected by top pervious layer, thus can avoid that construction period longitudinal drainage pipe is bending, affect drainage effect after distortion; Article two, between charge for remittance conduit, interval arranges about the many horizontal aqueducts be communicated with, and ensures that draining is unobstructed further.Take the mode that two longitudinal drainage pipes combine with many horizontal aqueducts, effectively improve open cut tunnel lining cutting drainage effect behind.By arranging draining filtering layer between backfill rock layers and side wall backfill layer, filtration and permeable effect can be played, be beneficial to the smooth unobstructed eliminating of underground water, effectively improve drainage effect.
Further beneficial effect of the present invention is: face upward oblique drain hole by arranging two rows in side slope, can underground water in ejectment side slope to charge for remittance conduit, improve side slope ponding situation, improve the stability of side slope.
Further beneficial effect of the present invention is: by arranging transverse drainage slope at side wall backfill layer end face, and ejectment of back fill course can being seeped water is to charge for remittance conduit place, and white-out lining cutting is ponding behind, effectively improves drainage effect.
Further beneficial effect of the present invention is: by arranging transverse row water-band on side slope surface, by the ejectment of side slope surface seepage in underground to bottom charge for remittance conduit, can ensure the stability of side slope further.
Further beneficial effect of the present invention is: described drainage system is layed in each backfill layer of open cut tunnel, but not is close to the setting of open-cut tunnel structure outer rim, thus easy construction.Longitudinal drainage pipe, horizontal aqueduct, transverse row water-band etc. all rely on side slope surface to arrange, and thus structure is more stable.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
The structural representation of the drainage system of the cut type open cut tunnel structure that Fig. 1 provides for the embodiment of the present invention;
The plane structure schematic diagram of the drainage system of the cut type open cut tunnel structure that Fig. 2 provides for the embodiment of the present invention;
The structure section schematic diagram of the charge for remittance conduit that Fig. 3 provides for the embodiment of the present invention.
Detailed description of the invention
Below in conjunction with the accompanying drawing in the embodiment of the present invention, be clearly and completely described the technical scheme in the embodiment of the present invention, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, other embodiments all that those of ordinary skill in the art obtain under the prerequisite not making creative work, all belong to the scope of protection of the invention.
As Fig. 1-Fig. 3, the embodiment of the present invention provides a kind of drainage system of cut type open cut tunnel structure, carries out draining behind for the lining cutting 1 at cut-and-cover tunnel, described open cut tunnel lining cutting 1 both sides or be one-sidedly provided with side slope 6, in the present embodiment, side slope 6 is all set in described open cut tunnel lining cutting 1 both sides.Backfill rock layers 2, side wall backfill layer 5 and foundation backfill layer 7 is furnished with from top to bottom all successively between described open cut tunnel and every side slope 6.Described every side side wall backfill layer 5 and foundation backfill layer 7 end face one end, slope 6 of keeping to the side longitudinally is respectively equipped with a charge for remittance conduit 8 along tunnel, every bar charge for remittance conduit 8 comprise be located at bottom fixed pedestal 13, be fixed on the longitudinal drainage pipe 10 on described fixed pedestal 13 and be located at the pervious layer 14 on top.Between two longitudinal drainage pipes 10, interval is furnished with the horizontal aqueduct 11 that many connect described two longitudinal drainage pipes 10; Described longitudinal drainage pipe 10 top loop is to being provided with multiple inlet opening 12; Draining filtering layer 3 is also provided with between described backfill rock layers 2 and side wall backfill layer 5.Wherein, the distance between described adjacent two horizontal aqueducts 11 is 5 ~ 10m, and the horizontal aqueduct 11 of every root is connected with upper and lower two longitudinal drainage pipes 10 respectively by tee junction; Described fixed pedestal 13 is concrete pedestal or cement mortar pedestal, and the thickness of described fixed pedestal 13 is 20cm; Charge for remittance conduit 8 is concrete conduit or cement mortar conduit, and side wall backfill layer 5 is piled up by mortar flag stone or sheet stone concrete and formed; Described pervious layer 14 is sandy gravel pervious layer.Described draining filtering layer 3 is piled up by non-fine concrete or sandy gravel and is formed, and the thickness of described draining filtering layer 3 is 40 ~ 60cm.The discharge structure of both sides is symmetrical along tunnel center line, and described horizontal aqueduct 11 is preferably along the adjacent domatic setting of side slope 6.
Take said structure can reach following beneficial effect: by arranging upper and lower two charge for remittance conduits 8 in backfill stratum, open cut tunnel both sides, with fixing longitudinal drainage pipe 10, and protected by top pervious layer 14, thus can avoid that construction period longitudinal drainage pipe 10 is bending, affect drainage effect after distortion; Article two, between charge for remittance conduit 8, interval arranges about the many horizontal aqueducts 11 be communicated with, and ensures that draining is unobstructed further.Take the mode that two longitudinal drainage pipes 10 combine with many horizontal aqueducts 11, effectively improve open cut tunnel lining cutting 1 drainage effect behind.By arranging draining filtering layer between backfill rock layers and side wall backfill layer, filtration and permeable effect can be played, be beneficial to the smooth unobstructed eliminating of underground water, effectively improve drainage effect.
As Fig. 3, in the present embodiment, described longitudinal drainage pipe top is arranged circumferentially each inlet opening within the scope of 120 ° ~ 180 °.The structure described longitudinal drainage pipe 10 being offered inlet opening 12 can take following several mode:
(1) the longitudinal drainage pipe 10 described in is evenly divided into the first half and the latter half, wherein the latter half is fixed in fixed pedestal 13, the first half hoop is provided with many water inlet pore areas, described water inlet pore area comprises multiple priming holes 12 that longitudinally gutter 10 length direction is arranged, and the vertical axis of described many water inlet pore areas longitudinally gutter 10 is symmetrical arranged.
(2) the longitudinal drainage pipe 10 described in is evenly divided into the first half and the latter half, wherein the latter half is fixed in concrete pedestal 13, the first half hoop is provided with many water inlet pore areas, and described water inlet pore area comprises multiple priming holes 12 that longitudinally gutter 10 length direction is arranged.According to the difference of longitudinal drainage pipe 10 horizontal left and right sides ponding situation, in the side that ponding is more, longitudinal drainage pipe 10 can be offered several water inlet pore areas more, to improve drainage effect.The central angle corresponding in two cambered surfaces of intaking between pore areas in outside is 150 ° ~ 180 °.
As Fig. 1, as a kind of preferred structure of the present embodiment, be furnished with multiple tracks along tunnel longitudinal separation in the side slope 6 at every bar charge for remittance conduit 8 place and face upward oblique drain hole 4.Wherein, the setting of the quantity and the elevation angle of facing upward oblique drain hole 4 should consider the developmental state of underground water in side slope 6.Preferably, the described adjacent twice distance of facing upward between oblique drain hole 4 is 3 ~ 5m, described in face upward oblique drain hole 4 the elevation angle be 10 ~ 15 °.Face upward oblique drain hole 4 by arranging two rows in side slope 6, can underground water in ejectment side slope 6 to charge for remittance conduit 8, improve side slope 6 ponding situation, thus improve the stability of side slope 6.
As Fig. 1, as a kind of preferred structure of the present embodiment, described side wall backfill layer 5 end face is provided with transverse drainage slope, and described transverse drainage slope is extended to side slope 6 by lining cutting 1.The different gradients is taked according to the water permeability difference of backfill rock layers 2 in described transverse drainage slope, and in the present embodiment, the gradient on described transverse drainage slope is 1% ~ 2%.By arranging transverse drainage slope, can by backfill rock layers infiltration ejectment to charge for remittance conduit place, white-out lining cutting is ponding behind, effectively improves drainage effect.
In addition, in actual use procedure, in conjunction with the developmental state of underground water and the status of protection of side slope 6, along tunnel, longitudinally multiple tracks transverse row water-band is set described side slope 6 is domatic, described each transverse row water-band and each horizontal aqueduct 11 transpostion interval are arranged, each transverse row water-band is connected with bottom charge for remittance conduit 8 respectively.By domatic for side slope 6 seepage in underground ejectment to bottom charge for remittance conduit 8, the stability of side slope 6 can be ensured further by arranging multiple tracks transverse row water-band.
As Fig. 1, described backfill rock layers 2 end face is also provided with clay water barrier 9, and the gradient of described clay water barrier 9 is 2%, and at the bottom of described clay water barrier 9 slope, one end is connected with gutter.By arranging clay water barrier 9, effectively can isolate top infiltration, reducing lining cutting 1 groundwater run off behind, thus improving ponding situation, improving the stability of open-cut tunnel structure.
The present embodiment has following beneficial effect: on the basis of traditional open cut tunnel drainage system, change and be close to the drainage pattern that open cut tunnel lining cutting arranges dewatering installation, by arranging charge for remittance conduit 8, longitudinal drainage pipe 10, concrete pedestal 13, facing upward oblique drain hole 4, draining filtering layer 3 and transverse drainage slope etc., the great drainage effect improving lining cutting 1 behind, the draining drawback solving current mountain tunnel open cut tunnel lining cutting 1 behind of system.After longitudinal drainage pipe 10 adopts concrete pedestal 13 fixing, not easily occur bending and deformation, draining is unobstructed.In massif, underground water is also got rid of in time by facing upward oblique drain hole 4 simultaneously, is conducive to the stability of side slope 6 structure, improves the stressing conditions of open cut tunnel, improves the stability of open-cut tunnel structure.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (8)
1. the drainage system of a cut type open cut tunnel structure, draining is carried out behind for the lining cutting at cut-and-cover tunnel, described open cut tunnel lining cutting both sides or be one-sidedly provided with side slope, backfill rock layers, side wall backfill layer and foundation backfill layer is furnished with from top to bottom all successively between described open cut tunnel and side slope, it is characterized in that: described side wall backfill layer and foundation backfill layer end face one end, slope of keeping to the side longitudinally is respectively equipped with a charge for remittance conduit along tunnel, every bar charge for remittance conduit comprise be located at bottom fixed pedestal, be fixed on the longitudinal drainage pipe on described fixed pedestal and be located at the pervious layer on top; Between two longitudinal drainage pipes, interval is furnished with the horizontal aqueduct that many connect described two longitudinal drainage pipes, and described longitudinal drainage pipe top loop is to being provided with multiple inlet opening; Draining filtering layer is also provided with between described backfill rock layers and side wall backfill layer;
Distance between the horizontal aqueduct of adjacent twice is 5 ~ 10m;
Longitudinally be provided with multiple tracks transverse row water-band at described side slope surface along tunnel, each transverse row water-band and each horizontal aqueduct transpostion interval are arranged, each transverse row water-band is connected with bottom charge for remittance conduit respectively.
2. the drainage system of cut type open cut tunnel structure according to claim 1, is characterized in that: be furnished with multiple tracks along tunnel longitudinal separation in the side slope at described every bar charge for remittance conduit place and face upward oblique drain hole.
3. the drainage system of cut type open cut tunnel structure according to claim 2, is characterized in that: described in face upward oblique drain hole the elevation angle be 10 ~ 15 °, the adjacent twice distance of facing upward between oblique drain hole is 3 ~ 5m.
4. the drainage system of cut type open cut tunnel structure according to any one of claim 1 to 3, is characterized in that: described side wall backfill layer end face is provided with transverse drainage slope, and described transverse drainage slope is extended to side slope by lining cutting.
5. the drainage system of cut type open cut tunnel structure according to claim 1, is characterized in that: described longitudinal drainage pipe top is arranged circumferentially each inlet opening within the scope of 120 ° ~ 180 °.
6. the drainage system of cut type open cut tunnel structure according to claim 1, is characterized in that: described draining filtering layer is piled up by non-fine concrete or sandy gravel and formed.
7. the drainage system of the cut type open cut tunnel structure according to claim 1 or 6, is characterized in that: described draining thickness of filter bed is 40 ~ 60cm.
8. the drainage system of cut type open cut tunnel structure according to claim 1, is characterized in that: described fixed pedestal is concrete pedestal or cement mortar pedestal.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410680178.5A CN104372749B (en) | 2014-11-25 | 2014-11-25 | The drainage system of cut type open cut tunnel structure |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410680178.5A CN104372749B (en) | 2014-11-25 | 2014-11-25 | The drainage system of cut type open cut tunnel structure |
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| CN104372749B true CN104372749B (en) | 2016-03-30 |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106436596B (en) * | 2016-11-24 | 2018-06-19 | 河北工业大学 | A kind of construction method for highway fiberglass sand inclusion pipe culverts |
| CN112228151A (en) * | 2020-09-21 | 2021-01-15 | 中铁工程设计咨询集团有限公司 | Tunnel open cut tunnel water drainage system |
| CN114086561B (en) * | 2021-11-04 | 2023-05-12 | 中铁八局集团第七工程有限公司 | Symmetrical backfilling and pouring method for rubble concrete on two sides of side wall of open cut tunnel |
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| EP1350922A1 (en) * | 2002-04-03 | 2003-10-08 | Société Lyonnaise d' Etanchéité par Géomembrane - S.L.E.G. | Device for draining, insulating and waterproofing of a tunnel |
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| CN203669886U (en) * | 2014-01-23 | 2014-06-25 | 招商局重庆交通科研设计院有限公司 | Maintainable-type tunnel drainage system |
| CN204356704U (en) * | 2014-11-25 | 2015-05-27 | 中铁第四勘察设计院集团有限公司 | The drainage system of cut type open cut tunnel structure |
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2014
- 2014-11-25 CN CN201410680178.5A patent/CN104372749B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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| US5470178A (en) * | 1994-02-17 | 1995-11-28 | Weholt; Raymond L. | Insulating tunnel liner system |
| EP1350922A1 (en) * | 2002-04-03 | 2003-10-08 | Société Lyonnaise d' Etanchéité par Géomembrane - S.L.E.G. | Device for draining, insulating and waterproofing of a tunnel |
| CN101435342A (en) * | 2008-12-22 | 2009-05-20 | 长安大学 | Tunnel ring direction drainpipe equipped with strip heat-insulating layer |
| CN202100263U (en) * | 2011-06-22 | 2012-01-04 | 中铁二院工程集团有限责任公司 | High-backfill open cut tunnel lining structure of high-intensity swelled ground region |
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