CN103032096B - Cold-proof construction method of tunnel central ditch of severe cold area - Google Patents
Cold-proof construction method of tunnel central ditch of severe cold area Download PDFInfo
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- CN103032096B CN103032096B CN201210537841.7A CN201210537841A CN103032096B CN 103032096 B CN103032096 B CN 103032096B CN 201210537841 A CN201210537841 A CN 201210537841A CN 103032096 B CN103032096 B CN 103032096B
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Abstract
The invention relates to a cold-proof construction method of a tunnel central ditch of a severe cold area, comprising the following steps of: a, carrying out cold-proof construction on a central water pipe; b, carrying out inspection well construction and c, carrying out outside-tunnel hidden pipe and heat-preservation water outlet construction. According to the cold-proof construction method disclosed by the invention, a tunnel is designed to adopt the deeply-buried central pipe in a range of 200 m from a tunnel opening to discharge water; all transverse water pipes are directly communicated with a central water discharging pipe; and a lining side wall has no water-leaking holes and a side ditch does not bear the effect of discharging the water. The center of a deeply-buried water pipe is located below a primary support; the peripheries of the water pipes are covered by graded broken stones to be used as reversed filtering layers; foam concrete covers the graded broken stones and an inspection well is arranged on the central water pipe; and after the water in the deeply-buried central pipe flows out of the tunnel, water in a blind ditch flows to a low-lying terrain part outside the tunnel through a through cut to be communicated with a previous river. According to the cold-proof construction method disclosed by the invention, a water discharging design of the tunnel is comprehensively considered on the aspects of design and construction, so that the tunnel damages problems of the tunnels of cold and severe cold areas, which are caused by the water, are basically solved.
Description
Technical field
The present invention relates to a kind of construction method of drainage, particularly relate to a kind of Cold-proof construction method of tunnel central ditch of severe cold area, belong to civil engineering technical field.
Background technology
In Jiaohe City, Jilin Province, the coldest monthly mean temperature in locality-23.4 DEG C, Annual lowest climate temperature-41.8 DEG C, belongs to severe cold area, maximum frozen depth 1.67m.Because temperature is low, tunnel water handling faces enormous challenge, and the fine or not completion having influence on tunnel being tested to a great extent of guarded drainage construction quality gives normal use.For severe cold area climate condition, easily there is frost heave in tunnel Central drain such as ponding when adopting common working measure winter, draining is obstructed, threatens normal use and the operation security in tunnel.Investigation shows, be in 34 railway tunnel of runing at present in the Harbin Railway Bureau administrative area of severe cold area, wherein have 2O seat to endanger by percolating water, 4 affect by freeze injury, simultaneously by freeze injury and seepage water mitigation, cause very large cost to operation at present and maintenance for 3.
From design and construction, how comprehensively consider the Drainage Design in tunnel, fundamentally solve Han Qu, tunnel in cold regions and cause the disease problem in tunnel to become day by day urgent due to water.
Summary of the invention
The technical problem to be solved in the present invention is, proposes to solve tunnel in cold regions causes the freezing damage problem in tunnel construction method due to water.
The present invention is the technical scheme solving the problems of the technologies described above proposition: a kind of Cold-proof construction method of tunnel central ditch of severe cold area, comprises the following steps:
A. the cold-proof construction of central water tube is carried out
Between two ports in described tunnel, bury the central water tube be connected with lining cutting draining blind pipe by horizontal water pipe underground, when described length of tunnel is less than or equal to four kms, described central water tube is all buried; When described length of tunnel is greater than four kms, buried into and out of the central water tube in each two kilometages of port apart from described tunnel, the central water tube shallow embedding of all the other paragraphs laying in described tunnel; The draining face of described buried central water tube is positioned at below local frost line;
B. manhole construction is carried out
Described central water tube circuit is interval with multiple manhole, and double-layer cover plate established by described manhole, and upper strata is reinforced concrete cover plate, and lower floor is immersion oil wooden cover plate; Be filled with heat insulating material between upper and lower layer cover plate, at described manhole well lid and borehole wall junction, rubber washer be set to increase manhole sealing;
C. hidden pipe and heat-insulating water outlet construction outside hole is carried out
Left and right lateral sulcus and buried underground run off is outside equipped with in the hole of the low hole end in described tunnel, described buried underground run off is postponed at horizontal hypsography low-lying place, side at hole, be embedded in below the depth of frost penetration and be more than or equal to 25 centimeters, the gradient is greater than 5/1000ths.
In a step of the present invention, described central water tube adopts joint to be the prefabricated reinforced concrete pipe that embedding mouth inserts formula; Central water tube groove excavates together with the inverted arch in described tunnel, concrete leveling layer is applied after excavation puts in place, and described central water tube is installed, central water tube longitudinal gradient after installation is consistent with line slope, the center line of described water pipe overlaps with line midline, water pipe installs and applies concrete pedestal, and is adopted by union wire gauze and mortar to process, backfill rubble loaded filter; Backfill the graded broken stone cleaned up between the buried water pipe in center and preliminary bracing, and graded broken stone particle diameter reduces gradually from the bottom to top, after the backfill of rubble loaded filter, lay foam concrete.On described central water tube body, also interval has blossom type spilled water hole.
In b step of the present invention, outside tunnel portal mileage, be also provided with the manhole of 3 corresponding left and right lateral sulcus of difference and Central drain, be communicated with horizontal insulating tube between manhole.
In step c of the present invention, described underground run off is interval with manhole, arranges heat-insulating water outlet at underground run off end, heat-insulating water outlet is in lee side's setting on the sunny side.
Beneficial effect of the present invention:
This Tunnel Design adopts the buried water pipe draining in center in the mileage of each two kms of inlet and outlet cave, and the central water tube in all the other sections all adopts the mode of shallow embedding, and all horizontal water pipes lead directly to central drainage pipe, and lateral sulcus does not bear the effect of draining substantially.Buried centre of conduit is positioned at below preliminary bracing, water pipe surrounding utilizes graded broken stone to wrap up as loaded filter, graded broken stone is covered with foam concrete, central water tube is provided with manhole, behind the water outflow tunnel of buried Central drain, covered conduit is adopted to be communicated with original river by the outer low-lying place of landform of cutting inflow hole.The present invention considers the Drainage Design in tunnel from design and construction comprehensively, compared with the two ends, tunnel at the end, central water tube is buried in temperature, prevent the freeze injury that low temperature produces water pipe, central water tube can be carried out shallow embedding to reduce construction cost by the tunnel stage casing higher in temperature, fundamentally can solve Han Qu, tunnel in cold regions cause the disease problem in tunnel due to water by the construction of construction method in the present invention.
Accompanying drawing explanation
Below in conjunction with accompanying drawing, Cold-proof construction method of tunnel central ditch of severe cold area of the present invention is described further.
Fig. 1 is the cross section structural representation of the drainage system of a kind of tunnel in cold regions related in construction method of the present invention.
Fig. 2 is the structural representation of the vertical section of the drainage system of a kind of tunnel in cold regions in the present invention.
Fig. 3 is the structural representation of the manhole related in construction method of the present invention.
Detailed description of the invention
The Cold-proof construction method of tunnel central ditch of severe cold area of the present embodiment comprises the following steps:
The cold-proof construction of a, central water tube
As shown in Figure 1, consider according to the coldest monthly mean temperature of length of tunnel and locality:
(1) when described length of tunnel is less than or equal to four kms, central water tube 1 is all buried and make the draining face of central water tube 1 be positioned at below local frost line (water pipe end face absolute altitude is lower 3.28 meters of rail level), and central water tube 1 is also connected with lining cutting draining blind pipe by horizontal water pipe 2.
(2) when described length of tunnel is greater than four kms, buried central water tube 1 in each 2000 meters of mileages of inlet and outlet cave, and make the draining face of central water tube 1 be positioned at below local frost line (water pipe end face absolute altitude is lower 3.28 meters of rail level), central water tube 1 all shallow embeddings of all the other paragraphs, central water tube 1 is also connected with lining cutting draining blind pipe by horizontal water pipe.
Tunnel central water tube 1 adopts prefabricated reinforced concrete pipe, internal diameter D=60cm, and wall thickness t=12cm often saves long 2m, and joint adopts embedding mouth in the formula of inserting.On central water tube 1 body, also interval has blossom type spilled water hole.Central water tube 1 is positioned at inverted arch and just props up less than 4, rail level 3.7 meters in central water tube 1 center to center distance, during inverted arch excavation, central water tube groove is excavated together, install for ease of central water tube 1, the degree of depth can suitably be backbreak 10cm, C20 concrete leveling layer 6 is applied after excavation puts in place, and mounting center water pipe 1, central water tube 1 longitudinal gradient its center line consistent with line slope overlaps with line midline, central water tube 1 installs and applies C20 concrete pedestal in time, and adopted by union 20# wire gauze and mortar to process, backfill rubble loaded filter.Backfill graded broken stone between central water tube 1 and preliminary bracing layer 4, and graded broken stone particle diameter reduces gradually from the bottom to top, particle diameter is at 2.5 ~ 5cm; Should clean up before graded broken stone construction, forbid graded broken stone surface to there is fine grained, earth etc., prevent from blocking graded broken stone draining gap; Graded broken stone should be tamped and meet base bearing capacity requirement.Lay the foam concrete 5 that the thick unit weight of 15cm is 300kg/m3 after the backfill of rubble loaded filter, this foam concrete 5 coefficient of thermal conductivity is not more than 0.08W/ (m.k), and compressive strength is not less than 600kpa, and fire resistance rating is A level.
B, manhole are constructed
As shown in Figures 2 and 3, central water tube 1 circuit is interval with multiple manhole, manhole 7 has the important function checking and get rid of in central drainage pipe pipe and silt, be effectively communicated with longitudinal drainage ditch and collect abutment wall draining up, and construction quality directly affects the quality of tunnel drainage.Double-layer cover plate established by manhole 7, and lower floor is immersion oil wooden cover plate, and upper strata is reinforced concrete cover plate; Upper and lower layer cover plate spacing is 0.35m, and central filler heat insulating material carries out isothermal holding, and manhole 7 is along line direction 30 meters/road.For preventing cold air from entering manhole 7, causing water in manhole 7 to freeze, in manhole 7 well lid and borehole wall junction, the thick rubber washer of 2cm being set to increase manhole 7 sealing.
Hidden pipe and heat-insulating water outlet outside c, hole
End hole, low hole, tunnel is outside equipped with left and right lateral sulcus and buried underground run off, described buried underground run off is postponed in horizontal hypsography low-lying place, side or closer distance physical features lower, front, side, fair line road at hole, be embedded in below the depth of frost penetration and be not less than 25cm, the gradient is greater than 5 ‰, 3 manholes 7 corresponding arranged on left and right sides ditch and Central drain is respectively provided with outside tunnel portal mileage, be communicated with horizontal insulating tube between manhole 7, the every 50m of underground run off arranges place's manhole 7.Underground run off adopts the reinforced concrete prefabricated pipe of φ 600, wall thickness 6cm.Gutter end arranges heat-insulating water outlet, heat-insulating water outlet leeward setting on the sunny side.
Of the present inventionly be not limited to above-described embodiment, all employings are equal to the technical scheme of replacing and being formed, and all drop in the protection domain of application claims.
Claims (1)
1. a Cold-proof construction method of tunnel central ditch of severe cold area, is characterized in that comprising the following steps:
A. the cold-proof construction of central water tube is carried out
Between two ports in described tunnel, be embedded with the central water tube be connected with lining cutting draining blind pipe by horizontal water pipe, when described length of tunnel is less than or equal to four kms, described central water tube is all buried; When described length of tunnel is greater than four kms, buried into and out of the central water tube in each two kilometages of port apart from described tunnel, the central water tube shallow embedding of all the other paragraphs laying in described tunnel; The draining face of described buried central water tube is positioned at below local frost line, and on described central water tube body, also interval has blossom type spilled water hole;
B. manhole construction is carried out
Described central water tube circuit is interval with multiple manhole, and double-layer cover plate established by described manhole, and upper strata is reinforced concrete cover plate, and lower floor is immersion oil wooden cover plate; Heat insulating material is filled with between upper and lower layer cover plate, at described manhole well lid and borehole wall junction, rubber washer is set to increase manhole sealing, described underground run off is interval with manhole, arranges heat-insulating water outlet at underground run off end, heat-insulating water outlet is in lee side's setting on the sunny side;
C. hidden pipe and heat-insulating water outlet construction outside hole is carried out
Left and right lateral sulcus and buried underground run off is outside equipped with in the hole of the low hole end in described tunnel, described buried underground run off is postponed at horizontal hypsography low-lying place, side at hole, be embedded in below the depth of frost penetration and be more than or equal to 25 centimeters, the gradient is greater than 5/1000ths, outside described Tunnel, be also provided with the manhole of 3 corresponding left and right lateral sulcus of difference and Central drain, be communicated with horizontal insulating tube between manhole.
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| CN201210537841.7A CN103032096B (en) | 2012-12-13 | 2012-12-13 | Cold-proof construction method of tunnel central ditch of severe cold area |
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| CN201210537841.7A CN103032096B (en) | 2012-12-13 | 2012-12-13 | Cold-proof construction method of tunnel central ditch of severe cold area |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104696011B (en) * | 2015-04-01 | 2017-03-08 | 广东安元矿业勘察设计有限公司 | The improved method of underground mine midplane drainage system |
| CN105840210B (en) * | 2016-06-12 | 2018-09-21 | 中铁二院工程集团有限责任公司 | The compound arch tunnel lining structure in box tunnel bottom with hydrophobic function |
| CN107201908B (en) * | 2017-06-16 | 2023-10-31 | 中铁五局集团有限公司 | Construction method for deep-buried central ditch of tunnel in severe cold region |
| CN107191677A (en) * | 2017-06-22 | 2017-09-22 | 中交二公局第五工程有限公司 | A kind of oil-gas pipeline protector and its construction method |
| CN107218058A (en) * | 2017-07-06 | 2017-09-29 | 中铁第四勘察设计院集团有限公司 | A kind of railway tunnel structure of layered arrangement |
| CN110258586A (en) * | 2019-07-05 | 2019-09-20 | 兰州铁道设计院有限公司 | Increase the structure and method of existing high roadbed tunnel backfill height |
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| CN202108542U (en) * | 2011-06-22 | 2012-01-11 | 中铁二院工程集团有限责任公司 | Heat preservation ditch structure of railway tunnel |
| CN102661171A (en) * | 2012-05-02 | 2012-09-12 | 中铁十一局集团第五工程有限公司 | Frost damage prevention drainage system for tunnel |
| CN202560320U (en) * | 2012-05-02 | 2012-11-28 | 中铁十一局集团第五工程有限公司 | Frost-damage preventing drainage system for tunnels |
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| CN202108542U (en) * | 2011-06-22 | 2012-01-11 | 中铁二院工程集团有限责任公司 | Heat preservation ditch structure of railway tunnel |
| CN102661171A (en) * | 2012-05-02 | 2012-09-12 | 中铁十一局集团第五工程有限公司 | Frost damage prevention drainage system for tunnel |
| CN202560320U (en) * | 2012-05-02 | 2012-11-28 | 中铁十一局集团第五工程有限公司 | Frost-damage preventing drainage system for tunnels |
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| 严寒地区隧道防排水施工技术探讨;王化平;《内蒙古科技与经济》;20090630(第11期);83-86 * |
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