CN105064280A - Tunnel underground river water burst blockage construction method - Google Patents
Tunnel underground river water burst blockage construction method Download PDFInfo
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- CN105064280A CN105064280A CN201510417891.5A CN201510417891A CN105064280A CN 105064280 A CN105064280 A CN 105064280A CN 201510417891 A CN201510417891 A CN 201510417891A CN 105064280 A CN105064280 A CN 105064280A
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Abstract
The invention discloses a tunnel underground river water burst blockage construction method. The early drainage and the later closing are performed on the underground river water burst by using modes of a water retaining wall, mortar filling and a water closing gate sluice valve to realize the maximum control over the underground river water burst. The construction method overcomes the influence of the water burst on the concrete pouring construction to the greatest extent in the concrete construction process of tunnel with a lot of water burst, so that the concrete construction quality is improved, the construction period is guaranteed, and the water burst treatment construction cost is reduced.
Description
Technical field
The invention belongs to tunnel engineering technical field, be specifically related to a kind of tunnel hydrous fluids underground river water burst plugging construction method.
Background technology
In the various built tunnel engineering of China, 80% harm meeting underground water in construction.Water burst is geological disaster the most common in construction of tunnel.In water burst geological disaster, especially serious with Karst water bursting.
Happen suddenly in tunnel construction a large amount of water burst, and harm is serious, not only causes equipment, personal injury, is even forced to stop work, affect the duration adversely, and difficult treatment, somewhat expensive.In increasing Inter-Basin Water Transfer Project, the buried Super-long tunnel of big cross section, hole line passes through various stratum.The seepage of construction period and water burst are great engineering geological problems.Success ground solves burst problem in construction, particularly not only water burst but also gush the problem of sand, is the key of the buried Ultra long tunnel project success or failure of big cross section.
Such as, come from cattle pen river-Dian Chi moisturizing Pumping Station water diversion engineering tunnel engineering, diversion tunnel full face excavation meets underground river, underground to during 2+483.5 pile No., and the constant water yield in underground river is more than 2m
3/ s.This is underground water rare both at home and abroad, and 2+483.5 ~ 2+018 hole, the diversion tunnel main hole section causing diversion 2# working tunnel and completed excavation construction is flooded.This plugging construction method is invented for realizing underground river water burst control.
Summary of the invention
The object of the invention is to control to realize tunnel underground river water burst, a kind of construction method being conducive to the water burst shutoff of tunnel underground river is provided.
Technical scheme of the present invention is: the mode utilizing waterwall+filled with mortar+close Water gate valve, underground river water burst is carried out drainage in early stage and the later stage is closed, and realizes the control to greatest extent to underground river water burst.
Concrete grammar is as follows:
The first step, digs mutually with one voice by underground river and diversion tunnel, meanwhile, arranges joint bar at underground river water surface curve above hole wall hoop, exposes part and welds with it after water conservancy diversion penstock installation completes, as water conservancy diversion steel pipe anchor point;
Second step, water conservancy diversion penstock installation: install gate valve at water conservancy diversion steel pipe water export, fill a pressure meter at gate valve upstream side, and connect by a fine steel tube and cause diversion tunnel;
3rd step, build waterwall by laying bricks or stones: after water conservancy diversion penstock installation completes, inside and outside water conservancy diversion steel pipe, termination, both sides builds two standard common brick waterwall respectively by laying bricks or stones, first in-built concrete woven bag is jettisoninged bottom underground river, water level is made to increase, until water conservancy diversion steel pipe 1/3 section overcurrent, stopping is jettisoninged, start to build waterwall by laying bricks or stones on volume bag, first inner side waterwall is built by laying bricks or stones, space between water conservancy diversion steel pipe and underground river solution cavity is filled up by inner side waterwall, after inner side waterwall has been built by laying bricks or stones, carry out outside waterwall to build by laying bricks or stones, method is identical with inner side waterwall, fill concrete delivery port and the backfill grouting mouth of pipe is reserved on waterwall top, after 24h built by laying bricks or stones by waterwall, concrete backfill is carried out to the space between twice waterwall, after concrete backfill completes 24h, carry out backfill grouting,
4th step, closes valve and closes water: valve is implemented by 1/3 stroke, 2/3 stroke, complete shut-down 3 steps, and after front stroke completes, interval 10min carries out next stroke, observed pressure meter reading simultaneously, after gate valve complete shut-down, pressure gauge reading is stabilized in 0.35MPa, is less than blocking concrete unstability water pressure;
Finally, structural concrete lining construction is carried out.
Described two standard common brick waterwalls are made up of two-layer common brick therebetween filled with mortar.
Construction method of the present invention, ensure that and exist in the tunnel concrete work progress of a large amount of water burst, overcome the impact of water burst on concrete pouring construction to greatest extent, improve concrete construction quality, ensure that the construction period, reduce Tunnel gushing treatment construction cost.
Accompanying drawing explanation
Fig. 1 is tunnel underground river of the present invention water burst plugging construction method floor map.
In figure: 1-diversion tunnel, 2-gate valve, 3-waterwall, 4-water conservancy diversion steel pipe, 5-joint bar, 6-fills mortar, and 7-digs, 8-fine steel tube.
Detailed description of the invention
The first step, with one voice digs 7 for 3.5m × 2m, so that mounted valve, does not does not occupy diversion tunnel concrete lining size after valve installation by underground river and diversion tunnel 1 phase.Meanwhile, arrange joint bar 5 at underground river water surface curve above hole wall hoop, joint bar is Φ 25mm, and slotting L=2m enters rock 1.7m, an array pitch 1.5m, exposes part and welds with it after water conservancy diversion penstock installation completes, as water conservancy diversion steel pipe anchor point.
Second step, water conservancy diversion penstock installation, water conservancy diversion steel pipe 4 adopts internal diameter 600mm, wall thickness 4mm steel pipe, and the long 7.5m of water conservancy diversion steel pipe is formed by connecting by the single-unit steel pipe flange of long 1.5m, installs gate valve 2 at water conservancy diversion steel pipe water export.Water conservancy diversion steel pipe distance from bottom underground river water surface curve 30cm, water conservancy diversion steel pipe merogenesis is transported to installation work face, docks after in place, reinforces.For monitoring underground river water pressure, install a pressure meter additional at gate valve upstream side, pressure gage measuring range is 0.6MPa, is connect and causes diversion tunnel, be convenient to observed reading by the fine steel tube 8 of a 10mm.
3rd step, builds waterwall 3 by laying bricks or stones, and after water conservancy diversion penstock installation completes, inside and outside water conservancy diversion steel pipe, termination, both sides builds two standard common brick waterwall respectively by laying bricks or stones.Waterwall is made up of the 24 common brick walls of twice interval 30cm, space between twice brick wall adopts M30 slurry placement 6, first concrete for in-built C30 woven bag is jettisoninged bottom underground river, water level is made to increase, until water conservancy diversion steel pipe 1/3 section overcurrent, stop jettisoninging, start to build waterwall by laying bricks or stones on volume bag, first build inner side waterwall by laying bricks or stones, the space between water conservancy diversion steel pipe and underground river solution cavity is filled up by inner side waterwall.After inner side waterwall has been built by laying bricks or stones, carry out outside waterwall and build by laying bricks or stones, method is identical with inner side waterwall.But fill concrete delivery port and the backfill grouting mouth of pipe is reserved on waterwall top.
After 24h built by laying bricks or stones by waterwall, concrete backfill is carried out in the space between starting twice waterwall, and fill concrete grade is C30/38, and concrete adopts pumping to put in storage.After concrete backfill completes 24h, carry out backfill grouting.
4th step, carries out pass valve and closes water, and valve is implemented by 1/3 stroke, 2/3 stroke, complete shut-down 3 steps.After front stroke completes, interval 10min carries out next stroke.Observed pressure meter reading simultaneously, after gate valve complete shut-down, pressure gauge reading is stabilized in 0.35MPa, is less than blocking concrete unstability water pressure.
Finally, structural concrete lining construction is carried out.
Claims (4)
1. a tunnel underground river water burst plugging construction method, is characterized in that carrying out according to the following steps:
The first step, digs mutually with one voice by underground river and diversion tunnel, meanwhile, arranges joint bar at underground river water surface curve above hole wall hoop, exposes part and welds with it after water conservancy diversion penstock installation completes, as water conservancy diversion steel pipe anchor point;
Second step, water conservancy diversion penstock installation: install gate valve at water conservancy diversion steel pipe water export, fill a pressure meter at gate valve upstream side, and connect by a fine steel tube and cause diversion tunnel;
3rd step, build waterwall by laying bricks or stones: after water conservancy diversion penstock installation completes, inside and outside water conservancy diversion steel pipe, termination, both sides builds two standard common brick waterwall respectively by laying bricks or stones, first in-built concrete woven bag is jettisoninged bottom underground river, water level is made to increase, until water conservancy diversion steel pipe 1/3 section overcurrent, stopping is jettisoninged, start to build waterwall by laying bricks or stones on volume bag, first inner side waterwall is built by laying bricks or stones, space between water conservancy diversion steel pipe and underground river solution cavity is filled up by inner side waterwall, after inner side waterwall has been built by laying bricks or stones, carry out outside waterwall to build by laying bricks or stones, method is identical with inner side waterwall, fill concrete delivery port and the backfill grouting mouth of pipe is reserved on waterwall top, after 24h built by laying bricks or stones by waterwall, concrete backfill is carried out to the space between twice waterwall, after concrete backfill completes 24h, carry out backfill grouting,
4th step, closes valve and closes water: valve is implemented by 1/3 stroke, 2/3 stroke, complete shut-down 3 steps, and after front stroke completes, interval 10min carries out next stroke, observed pressure meter reading simultaneously, after gate valve complete shut-down, pressure gauge reading is stabilized in 0.35MPa, is less than blocking concrete unstability water pressure;
Finally, structural concrete lining construction is carried out.
2. tunnel underground river according to claim 1 water burst plugging construction method, is characterized in that
Described two standard common brick waterwalls are made up of two-layer 24 common brick centre M30 filled with mortar, twice waterwall interval 30cm.
3. tunnel underground river according to claim 1 water burst plugging construction method, is characterized in that described joint bar is Φ 25mm, long 2m, inserts rock 1.7m, an array pitch 1.5m.
4. tunnel underground river according to claim 1 water burst plugging construction method, it is characterized in that water conservancy diversion steel pipe adopts internal diameter 600mm, wall thickness 4mm, long 7.5m, connected and composed by the single-unit steel pipe flange of long 1.5m.
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| CN201510417891.5A CN105064280A (en) | 2015-07-16 | 2015-07-16 | Tunnel underground river water burst blockage construction method |
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| CN201510417891.5A CN105064280A (en) | 2015-07-16 | 2015-07-16 | Tunnel underground river water burst blockage construction method |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105821894A (en) * | 2016-01-22 | 2016-08-03 | 中国水电基础局有限公司 | Processing method for large karst cave underground river with water gushing and structure thereof |
| CN109653171A (en) * | 2018-12-17 | 2019-04-19 | 中冶沈勘秦皇岛工程设计研究总院有限公司 | Tailings Dam water discharge tunnel band water seal blocking method |
| CN112031811A (en) * | 2020-07-22 | 2020-12-04 | 济南力稳岩土工程有限公司 | System and method for blocking cliff through water burst and grouting |
| CN112282784A (en) * | 2020-10-15 | 2021-01-29 | 浙江省水利水电勘测设计院 | Construction method for tunnel crossing underpass close to karst cave underground river |
| CN113279429A (en) * | 2021-07-01 | 2021-08-20 | 中国葛洲坝集团生态环境工程有限公司 | Plugging structure and plugging method for underground diversion operation |
| CN114483185A (en) * | 2022-02-17 | 2022-05-13 | 中铁二院工程集团有限责任公司 | Overflow-prevention structure for operating period of diffusion-accumulation inclined shaft and construction method |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105821894A (en) * | 2016-01-22 | 2016-08-03 | 中国水电基础局有限公司 | Processing method for large karst cave underground river with water gushing and structure thereof |
| CN109653171A (en) * | 2018-12-17 | 2019-04-19 | 中冶沈勘秦皇岛工程设计研究总院有限公司 | Tailings Dam water discharge tunnel band water seal blocking method |
| CN112031811A (en) * | 2020-07-22 | 2020-12-04 | 济南力稳岩土工程有限公司 | System and method for blocking cliff through water burst and grouting |
| CN112282784A (en) * | 2020-10-15 | 2021-01-29 | 浙江省水利水电勘测设计院 | Construction method for tunnel crossing underpass close to karst cave underground river |
| CN113279429A (en) * | 2021-07-01 | 2021-08-20 | 中国葛洲坝集团生态环境工程有限公司 | Plugging structure and plugging method for underground diversion operation |
| CN114483185A (en) * | 2022-02-17 | 2022-05-13 | 中铁二院工程集团有限责任公司 | Overflow-prevention structure for operating period of diffusion-accumulation inclined shaft and construction method |
| CN114483185B (en) * | 2022-02-17 | 2022-09-13 | 中铁二院工程集团有限责任公司 | Overflow-prevention structure for operating period of diffusion-accumulation inclined shaft and construction method |
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Application publication date: 20151118 |