CN212376693U - Tunnel drainage structure with deep-buried central ditch and drainage tunnel combined - Google Patents
Tunnel drainage structure with deep-buried central ditch and drainage tunnel combined Download PDFInfo
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- CN212376693U CN212376693U CN202020624800.1U CN202020624800U CN212376693U CN 212376693 U CN212376693 U CN 212376693U CN 202020624800 U CN202020624800 U CN 202020624800U CN 212376693 U CN212376693 U CN 212376693U
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Abstract
The utility model relates to a tunnel drainage structure combining a deep-buried central ditch and a drainage tunnel, which comprises an upper drainage cold-proof structure and a lower drainage cold-proof structure; the upper drainage cold-proof structure comprises an annular blind pipe positioned between the primary tunnel support and the secondary tunnel lining; the lower drainage cold-proof structure comprises a deep-buried central ditch and a longitudinal drainage tunnel; the deep buried central trench is longitudinally arranged below the central line of the inverted arch of the tunnel, and the longitudinal drainage tunnel is longitudinally arranged below the central line of the deep buried central trench; the bottom end of the annular blind pipe is connected with a deeply buried central ditch, and the bottom of the deeply buried central ditch is connected into a longitudinal drainage tunnel through a vertical PVC pipe with the diameter of 100 mm. The utility model discloses traditional tunnel lateral wall groundwater warp flows and excretes the route, collects the hole extra income fast and channels into burying central ditch deeply, continues to discharge through the leading-in deep sluicing hole of inspection shaft and excretes, has effectually taken into account drainage and winter protection dual function.
Description
Technical Field
The utility model belongs to the technical field of tunnel engineering, concretely relates to bury tunnel drainage structure of center ditch and sluicing tunnel combination deeply.
Background
The freezing injury problem of the plateau high-cold tunnel is mainly embodied in that underground water cannot be drained and frozen in time, and then ditches and ballast beds in the tunnel are frozen, so that the operation safety is seriously influenced.
The existing water prevention and drainage principle and engineering arrangement usually collect and drain underground water and flow through the inner side ditch of the hole, so that freezing damage such as freezing, ice hanging and the like in the flowing process is easy to generate. In order to effectively realize the collection and drainage of underground water in the tunnel, a convenient and appropriate-scale drainage and cold-proof structure needs to be realized.
Disclosure of Invention
The utility model aims at providing a bury tunnel drainage structure of central ditch and sluicing hole combination deeply can change tunnel groundwater from shallow layer longitudinal flow into deep longitudinal flow and excrete, has compromise winter protection and drainage function, the effectual tunnel structure safety that has ensured.
The utility model discloses the technical scheme who adopts does:
the utility model provides a bury tunnel drainage structures of central ditch and sluicehole combination deeply which characterized in that:
the structure comprises an upper water drainage cold-proof structure and a lower water drainage cold-proof structure;
the upper drainage cold-proof structure comprises an annular blind pipe positioned between the primary tunnel support and the secondary tunnel lining;
the lower drainage cold-proof structure comprises a deep-buried central ditch and a longitudinal drainage tunnel; the deep buried central trench is longitudinally arranged below the central line of the inverted arch of the tunnel, and the longitudinal drainage tunnel is longitudinally arranged below the central line of the deep buried central trench;
the bottom end of the annular blind pipe is connected with a deeply buried central ditch, and the bottom of the deeply buried central ditch is connected into a longitudinal drainage tunnel through a vertical PVC pipe with the diameter of 100 mm.
The upper water-draining cold-proof structure also comprises a longitudinal blind pipe arranged at the tunnel arch springing, and the annular blind pipe is communicated with the longitudinal blind pipe at the tunnel arch springing through a tee joint.
The upper drainage cold-proof structure also comprises bilateral ditches longitudinally arranged on two sides in the tunnel;
the lower part drainage cold-proof structure also comprises a transverse drainage tunnel which is vertically communicated with the longitudinal drainage tunnel;
the bottoms of the ditches at the two sides are connected into a transverse drainage tunnel through a vertical PVC pipe with the diameter of 150 mm.
And a drainage cross slope with the gradient of 4% is arranged in the transverse drainage tunnel and is communicated with the longitudinal drainage tunnel.
The deep-buried central ditch comprises a longitudinal central circular pipe, wherein the bottom of the central circular pipe is provided with cushion concrete, and the upper part of the central circular pipe is covered with a graded broken stone filter layer.
The lower part drainage cold-proof structure also comprises a plurality of inspection wells which are vertically arranged along the longitudinal interval of the tunnel, the top of each inspection well is positioned in the tunnel, and the bottom of each inspection well is connected into the longitudinal drainage tunnel.
The inspection well comprises a concrete well body, an oil-impregnated wood cover plate is arranged at the top of the concrete well body, a polyurethane heat-insulating layer covers the oil-impregnated wood cover plate, and a concrete cover plate is arranged above the polyurethane heat-insulating layer.
And a steel ladder is arranged on the inner wall of the inspection well.
And water retaining walls are arranged in the ditches on the two sides of the starting point section of the longitudinal drainage tunnel and used for intercepting catchment in the ditches on the high end side of the tunnel and vertically and inversely discharging the catchment into the transverse drainage tunnel at the lower part through a PVC pipe with the diameter of 150 mm.
The utility model has the advantages of it is following:
the utility model discloses a tunnel drainage winter protection structure whole building overall arrangement is simple, the principle is clear simple, drainage and winter protection are effectual, the civil engineering investment is practiced thrift. The method specifically comprises the following steps: the underground water channel flow and the drainage path of the side wall of the traditional tunnel are overturned, the water outside the tunnel is quickly collected and guided into the deep buried central ditch, and the water is continuously guided into the deep drainage tunnel through the inspection well and drained, so that the double functions of drainage and cold prevention are effectively considered. Meanwhile, the seepage water and the cleaning water in the side ditches can directly flow into the transverse drainage tunnel through the vertical PVC pipe, so that the side ditches are in a dry or wet state for a long time, and the freezing disease of the ditches is avoided.
Drawings
FIG. 1 is a schematic view of the whole tunnel water drainage cold-proof structure of the present invention;
FIG. 2 is a schematic view of the upper tunnel water drainage and cold-proof structure of the present invention;
FIG. 3 is a schematic view of the drainage structure of the lower tunnel of the present invention;
FIG. 4 is a schematic view of the tunnel deep buried center trench of the present invention;
FIG. 5 is a schematic view of the connection between the drainage tunnel at the lower part of the tunnel and the inspection well;
FIG. 6 is a schematic sectional view of the connection between a drainage tunnel and a tunnel according to the present invention;
FIG. 7 is a schematic plan view of the sluicing tunnel of the present invention;
fig. 8 is a schematic view of the arrangement of the drainage planes of the combined structure of the present invention.
In the figure: 1-upper drainage cold-proof structure, 2-lower drainage cold-proof structure, 3-tunnel primary support, 4-tunnel secondary lining, 5-annular blind pipe, 6-longitudinal blind pipe, 7-bilateral ditch, 8-longitudinal drainage hole, 9-transverse drainage hole, 10-deep buried central ditch, 11-inspection well, 12-diameter 100mm PVC pipe, 13-diameter 150mm PVC pipe, 14-central circular pipe, 15-cushion concrete, 16-graded broken stone filter layer, 17-steel ladder stand, 18-oil-impregnated wood cover plate, 19-concrete shaft body, 20-concrete cover plate, 21-polyurethane heat-insulating layer and 22-water retaining wall.
The letters in the figures: the distance from the bottom of the inverted arch to the top surface of the drainage tunnel.
Detailed Description
The present invention will be described in detail with reference to the following embodiments.
The utility model relates to a bury tunnel drainage structure of central ditch and sluicing cave combination deeply, to plateau alpine region tunnel engineering drainage and winter protection setting, ensure that the tunnel is safe and not frozen harm takes place at operation service period structural safety. The structure comprises an upper drainage cold-proof structure 1 and a lower drainage cold-proof structure 2; the upper drainage cold-proof structure 1 comprises an annular blind pipe 5 positioned between the primary tunnel support 3 and the secondary tunnel lining 4; the lower drainage cold-proof structure 2 comprises a deep-buried central ditch 10 and a longitudinal drainage tunnel 8; the deep buried central trench 10 is longitudinally arranged below the central line of the inverted arch of the tunnel, and the longitudinal drainage tunnel 8 is longitudinally arranged below the central line of the deep buried central trench 10; the bottom end of the annular blind pipe 5 is connected with a deep-buried central ditch 10, and the bottom of the deep-buried central ditch 10 is connected with a longitudinal drainage tunnel 8 through a PVC pipe 12 with the vertical diameter of 100 mm.
The upper drainage cold-proof structure 1 further comprises a longitudinal blind pipe 6 arranged at the tunnel arch foot, and the annular blind pipe 5 is communicated with the longitudinal blind pipe 6 at the tunnel arch foot through a tee joint. The upper drainage cold-proof structure 1 also comprises bilateral ditches 7 longitudinally arranged at two sides in the tunnel; the lower part drainage cold-proof structure 2 also comprises a transverse drainage tunnel 9 which is vertically communicated with the longitudinal drainage tunnel 8; the bottom of the bilateral ditch 7 is connected into the transverse drainage tunnel 9 through a vertical PVC pipe 13 with the diameter of 150 mm. A drainage cross slope with the gradient of 4% is arranged in the transverse drainage tunnel 9 and is communicated with the longitudinal drainage tunnel 8.
The deeply buried central trench 10 comprises a longitudinal central circular tube 14, wherein the bottom of the central circular tube 14 is provided with cushion concrete 15, and the upper part of the central circular tube is covered with a graded broken stone filter layer 16.
The lower part drainage cold-proof structure 2 further comprises an inspection well 11, the inspection well 11 is vertically arranged at a plurality of positions along the longitudinal direction of the tunnel at intervals, the top of the inspection well 11 is positioned in the tunnel, and the bottom of the inspection well is connected into the longitudinal drainage tunnel 8. The inspection well 11 comprises a concrete well body 19, an oil-impregnated wood cover plate 18 is arranged at the top of the concrete well body 19, a polyurethane heat-insulating layer 21 covers the oil-impregnated wood cover plate 18, and a concrete cover plate 20 is arranged above the polyurethane heat-insulating layer 21. The inner wall of the inspection well 11 is provided with a steel ladder stand 17.
The water retaining wall 22 is arranged in the bilateral ditch 7 at the starting point section of the longitudinal sluicing tunnel 8 and is used for intercepting catchment in the ditch at the high end of the tunnel and vertically and inversely discharging the catchment into the lower transverse sluicing tunnel 9 through a PVC pipe 13 with the diameter of 150 mm.
The construction method of the tunnel drainage structure combining the deep-buried central ditch and the drainage tunnel comprises the following steps:
the method comprises the following steps: after the starting and finishing points of the longitudinal drainage tunnel 8 and the deep-buried central trench 10 are determined, construction and line laying are started, and the central axis of the longitudinal drainage tunnel is positioned and excavated; the longitudinal drainage tunnel 8 is constructed ahead of the upper drainage cold-proof structure 1;
step two: after a longitudinal drainage tunnel 8 is excavated for 100m, an upper drainage cold-proof structure 1 is excavated and constructed, and an annular blind pipe 5 and a longitudinal blind pipe 6 are distributed on the surface of a primary support 3 of the tunnel;
step three: slotting and paving cushion concrete 15 at the bottom of the primary tunnel support 3, then placing a central circular tube 14 at the upper part, covering a graded broken stone filter layer 16, and connecting the annular blind tube 5 with the central circular tube 14 to form a deep-buried central ditch 10;
step four: when an inverted arch of a tunnel secondary lining 4 is constructed, a plane hole of the inspection well 11 is reserved through a secondary lining trolley mold; the hole is vertically excavated downwards to form a concrete well body 19 which is communicated with the lower longitudinal drainage tunnel 8;
step five: a steel ladder stand 17, an oil-impregnated wood cover plate 18, a concrete cover plate 19 and a polyurethane heat-insulating layer 20 are arranged in the inspection well 11;
step six: after the bilateral ditch 7 is poured, a hole is drilled in the ditch through a directional drill to the transverse drainage hole 9, and a PVC pipe 13 with the diameter of 150mm is installed to realize vertical communication between the ditch and the transverse drainage hole.
Referring to fig. 2, the upper drainage cold-proof structure 1 comprises a tunnel primary support 3, a tunnel secondary lining 4, a circumferential blind pipe 5, a longitudinal blind pipe 6 and a bilateral ditch 7. The annular blind pipe 5 is arranged between the primary tunnel support 3 and the secondary tunnel lining 4, and is in three-way connection with the longitudinal blind pipe 6 at the arch springing position.
Referring to fig. 3, the lower drain structure 2 includes a longitudinal spillway tunnel 8, a transverse spillway tunnel 9, a deep-buried central trench 10, and an inspection shaft 11. The structural center line of the longitudinal sluicing tunnel 8 coincides with the center line of the tunnel structure, the transverse arrangement dimension of the transverse sluicing tunnel 9 is equal to the span of the tunnel structure, and 4% of drainage transverse slopes are arranged to be communicated with the longitudinal sluicing tunnel 8.
Referring to fig. 5, the longitudinal sluicehole 8 has a straight-wall section without an inverted arch, and has a size of 2.2 × 2.5m (height × width), and the depth is set to a value of H under the inverted arch of the tunnel which is not less than the minimum freezing depth and 5 m. The construction is carried out by adopting a subsurface excavation method, which is designed by combining the conditions of the stratum and underground water in advance of the construction of the main tunnel, the lining back of the drainage tunnel and the reverse filtration measure of the drainage holes.
The deep-buried central ditch 10 comprises a central circular pipe 14, a plain concrete cushion layer 15 and a graded broken stone filter layer 16. The central ditch 10 is arranged closely under the inverted arch of the tunnel, and the graded broken stone filtering layer 16 is used for filtering the underground water entering the central circular pipe 14 through the annular blind pipe 5.
The inspection well 11 is arranged for inspection and dredging, is longitudinally arranged at an interval of 50m and comprises a steel ladder stand 17, an oil-impregnated wood cover plate 18, a concrete well body 19, a concrete cover plate 20 and a polyurethane heat-insulating layer 21. A polyurethane heat-insulating layer 21 is additionally arranged between the concrete cover plate 20 and the oil-impregnated wood cover plate 18 so as to be convenient for heat insulation.
The annular blind pipe 5, the central circular pipe 14, the vertical PVC pipe and the drainage tunnel pipe form a shallow and deep underground water flow path from top to bottom, and the purposes of drainage, drainage and cold prevention are achieved.
Water in the ditch 7 on the two sides in the tunnel is guided into the transverse drainage tunnel 9 through a PVC pipe 13 with the vertical diameter of 150mm and converged to the longitudinal drainage tunnel 8.
The deep-buried central ditch and sluicehole combined structure for tunnel drainage and cold protection comprises the following steps:
the method comprises the following steps: according to meteorological, hydrological and geological data, after the starting and ending points of the longitudinal drainage tunnel 8 and the deep-buried central trench 10 are determined, construction and setting-out are started, the central axis of the longitudinal drainage tunnel is positioned, and excavation is carried out. The longitudinal drainage tunnel 8 is constructed ahead of the upper drainage cold-proof structure 1, and meanwhile, controlled blasting is adopted for excavation in order to reduce disturbance to surrounding rocks and a main tunnel structure.
Step two: after the longitudinal drainage tunnel 8 is excavated for 100m, the upper drainage cold-proof structure 1 can be excavated and constructed, and the annular blind pipe 5 and the longitudinal blind pipe 6 are distributed on the surface of the primary support 3 of the tunnel. The longitudinal distance between the circumferential blind pipes 5 can be properly encrypted or reduced according to the theoretical water inflow of the underground water.
Step three: and (3) slotting and paving a plain concrete cushion layer 15 at the bottom of the primary tunnel support 3, then placing a central circular pipe 14 at the upper part, covering a graded broken stone filter layer 16, and connecting the annular blind pipe 5 with the central circular pipe 14 to form a deep-buried central ditch 10.
Step four: when the inverted arch of the tunnel secondary lining 4 is constructed, a plane hole of the inspection well 11 is reserved through the secondary lining trolley mold. The hole is used to vertically excavate downwards to form a concrete well bore 19 and communicate with the lower longitudinal drainage tunnel 8.
Step five: auxiliary structures such as a steel ladder stand 17, an oil-impregnated wood cover plate 18, a concrete cover plate 20, a polyurethane heat-insulating layer 21 and the like are arranged in the inspection well 11;
step six: after the bilateral ditch 7 is poured, a hole is drilled in the ditch through a directional drill to the transverse drainage hole 9, and a PVC pipe 13 with the diameter of 150mm is installed to realize vertical communication between the ditch and the transverse drainage hole.
Referring to fig. 4, the central circular pipe 14 may be a prefabricated reinforced concrete circular pipe, the inner diameter of the circular pipe may be designed according to 60cm, and the connection part with the annular blind pipe 5 may be wrapped by geotextile.
Referring to FIG. 6, PVC pipes with 150mm diameter are arranged in groups of 5 pipes at 50cm intervals, and each group is longitudinally spaced at 50m intervals.
Referring to fig. 7, the diameter of the outlet holes of the drainage tunnels can be 5cm, and the distance between the outlet holes is 1 × 1m (ring × longitudinal).
The utility model discloses in, tunnel drainage winter protection structrual branch upper portion and two parts of lower part. The upper structure mainly plays a role in collecting water through a blind pipe system; the lower structure is a deep-buried structure and mainly realizes cold-proof and water drainage functions. The combination of the two can greatly shorten the underground water converging path, form a high-speed channel for converging, discharging and discharging, avoid the problems of ice accumulation, freezing, rail upwelling and the like of the inner side ditch of the tunnel, and improve the durability and service cycle of the tunnel structure.
The upper structure overturns the water collecting and draining principle of the ditch on two sides in the traditional tunnel, and underground water is directly introduced into the deep-buried central ditch through a blind pipe system so as to realize the deep water collecting function; the lower structure mainly realizes that underground water is changed from shallow longitudinal flow to deep longitudinal flow and is discharged by arranging the deep-buried central ditch and the deep drainage tunnel at the bottom of the center of the tunnel, and the cold-proof and drainage functions are considered, and the upper structure and the lower structure are communicated through the vertical PVC pipe. For tunnel portal projects in areas with the average temperature of the coldest month lower than minus 8 ℃ and high groundwater water-rich property, groundwater does not flow into the tunnel portal, and freezing diseases of ditches and road beds in the tunnel are avoided. Meanwhile, the lower drainage cold-proof structure is arranged at the bottom of the center of the tunnel, so that the arrangement scale of the transverse drainage tunnel can be properly reduced, the investment is reduced, and the construction risk is controlled.
The content of the present invention is not limited to the examples, and any equivalent transformation adopted by the technical solution of the present invention is covered by the claims of the present invention by those skilled in the art through reading the present invention.
Claims (9)
1. The utility model provides a bury tunnel drainage structures of central ditch and sluicehole combination deeply which characterized in that:
the structure comprises an upper water drainage cold-proof structure (1) and a lower water drainage cold-proof structure (2);
the upper water drainage and cold protection structure (1) comprises a circumferential blind pipe (5) positioned between a primary tunnel support (3) and a secondary tunnel lining (4);
the lower part drainage cold-proof structure (2) comprises a deep-buried central ditch (10) and a longitudinal drainage tunnel (8); the deep buried central trench (10) is longitudinally arranged below the central line of the tunnel inverted arch, and the longitudinal drainage hole (8) is longitudinally arranged below the central line of the deep buried central trench (10);
the bottom end of the annular blind pipe (5) is connected into a deeply buried central ditch (10), and the bottom of the deeply buried central ditch (10) is connected into a longitudinal drainage tunnel (8) through a vertical PVC pipe (12) with the diameter of 100 mm.
2. The tunnel drainage structure of claim 1, wherein the central ditch is deeply buried and the tunnel drainage structure is combined with a drainage tunnel, and the tunnel drainage structure comprises:
the upper water drainage and cold protection structure (1) further comprises a longitudinal blind pipe (6) arranged at the tunnel arch foot, and the annular blind pipe (5) is communicated with the longitudinal blind pipe (6) at the tunnel arch foot through a tee joint.
3. The tunnel drainage structure of claim 2, wherein the central ditch is deeply buried and the tunnel drainage structure is combined with a drainage tunnel, and the tunnel drainage structure comprises:
the upper water-draining and cold-preventing structure (1) also comprises bilateral ditches (7) longitudinally arranged at two sides in the tunnel;
the lower part drainage cold-proof structure (2) also comprises a transverse drainage tunnel (9) which is vertically communicated with the longitudinal drainage tunnel (8);
the bottoms of the bilateral ditches (7) are connected into the transverse drainage tunnel (9) through a vertical PVC pipe (13) with the diameter of 150 mm.
4. The tunnel drainage structure of claim 3, wherein the central ditch is deeply buried and the tunnel drainage structure is combined with a drainage tunnel, and the tunnel drainage structure comprises:
a drainage cross slope with the gradient of 4 percent is arranged in the transverse drainage tunnel (9) and is communicated with the longitudinal drainage tunnel (8).
5. The tunnel drainage structure of claim 4, wherein the central ditch is deeply buried and the tunnel drainage structure is combined with a drainage tunnel, and the tunnel drainage structure comprises:
the deeply buried central trench (10) comprises a longitudinal central circular tube (14), wherein the bottom of the central circular tube (14) is provided with cushion concrete (15), and the upper part of the central circular tube is covered with a graded broken stone filter layer (16).
6. The tunnel drainage structure of claim 5, wherein the central ditch is deeply buried and the tunnel drainage structure is combined with a drainage tunnel, and the tunnel drainage structure comprises:
the lower part drainage cold-proof structure (2) further comprises an inspection well (11), a plurality of positions are vertically arranged on the inspection well (11) at intervals along the longitudinal direction of the tunnel, the top of the inspection well (11) is located in the tunnel, and the bottom of the inspection well is connected into the longitudinal drainage tunnel (8).
7. The tunnel drainage structure of claim 6, wherein the central ditch is deeply buried and the tunnel drainage structure is combined with a drainage tunnel, and the tunnel drainage structure comprises:
the inspection well (11) comprises a concrete well body (19), an oil-impregnated wood cover plate (18) is arranged at the top of the concrete well body (19), a polyurethane heat-insulating layer (21) covers the oil-impregnated wood cover plate (18), and a concrete cover plate (20) is arranged above the polyurethane heat-insulating layer (21).
8. The tunnel drainage structure of claim 7, wherein the central ditch is deeply buried and the tunnel drainage structure is combined with a drainage tunnel, and the tunnel drainage structure comprises:
the inner wall of the inspection well (11) is provided with a steel ladder (17).
9. The tunnel drainage structure of claim 8, wherein the central ditch is deeply buried and the tunnel drainage structure is combined with a drainage tunnel, and the tunnel drainage structure comprises:
and water retaining walls (22) are arranged in the bilateral ditches (7) at the starting point section of the longitudinal drainage tunnel (8) and used for intercepting catchment water in the high-end side ditches of the tunnel and vertically and inversely discharging the catchment water to the lower transverse drainage tunnel (9) through a PVC pipe (13) with the diameter of 150 mm.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202020624800.1U CN212376693U (en) | 2020-04-23 | 2020-04-23 | Tunnel drainage structure with deep-buried central ditch and drainage tunnel combined |
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| CN202020624800.1U CN212376693U (en) | 2020-04-23 | 2020-04-23 | Tunnel drainage structure with deep-buried central ditch and drainage tunnel combined |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111441820A (en) * | 2020-04-23 | 2020-07-24 | 中铁第一勘察设计院集团有限公司 | Tunnel drainage structure combining deep-buried central ditch and drainage tunnel and construction method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111441820A (en) * | 2020-04-23 | 2020-07-24 | 中铁第一勘察设计院集团有限公司 | Tunnel drainage structure combining deep-buried central ditch and drainage tunnel and construction method |
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