CN102296962B - Adverse slope excavating construction method of large-section tunnel in water-rich tunnel section - Google Patents
Adverse slope excavating construction method of large-section tunnel in water-rich tunnel section Download PDFInfo
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- CN102296962B CN102296962B CN 201110162591 CN201110162591A CN102296962B CN 102296962 B CN102296962 B CN 102296962B CN 201110162591 CN201110162591 CN 201110162591 CN 201110162591 A CN201110162591 A CN 201110162591A CN 102296962 B CN102296962 B CN 102296962B
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Abstract
The invention relates to an adverse slope excavating construction method of a large-section tunnel in a water-rich tunnel section, and aims at providing a construction method capable of orderly and automatically discharging underground gushing water. The technical scheme of the invention comprises the steps of: a, firstly, carrying out top step excavation to form a top step excavating hole section; b, carrying out low slope excavation to form a top step sloping hole section; c, setting a ponding bin; d, installing a water pump and a pumping pipe in the ponding bin; e, carrying out top step excavation on a water-rich hole section according to a temporary positive slope; and f, carrying out bottom step bottom excavation according to the reverse direction of a designed longitudinal slope of a tunnel after the top step excavation of the water-rich hole section is completed and a bottom excavated working face at the downstream side of the tunnel runs through. The invention is suitable for construction of underground projects such as water conservancy and hydropower projects, traffics, mines and the like in an underground gushing water-rich hole section.
Description
Technical field
The present invention relates to a kind of big section tunnel in rich water hole section excavation adverse grade job practices, be applicable to that underground constructions such as water conservancy and hydropower, traffic, mine enrich the construction of hole section at underground water burst.
Background technology
Underground construction is at underground water water burst hole section adverse grade excavation construction, not only there are constructor, device security hidden danger, and because the excavation face is subjected to influence on groundwater, cause tunnel floor boring, powder charge, slag tap and blasting efficiency reduces significantly, thereby increased the excavation activity duration, execution conditions are also comparatively abominable simultaneously.
Summary of the invention
The technical problem to be solved in the present invention is: provide a kind of big section tunnel in rich water hole section excavation adverse grade job practices at the problems referred to above, this method is safe and reliable, can flow automatically in order and discharge underground water burst,, improve construction environment to improve adverse grade water burst hole section efficiency of construction.
The technical solution adopted in the present invention is: a kind of big section tunnel may further comprise the steps in rich water hole section excavation adverse grade job practices:
A, at first in the position that is higher than tunnel design floor elevation to the tunnel excavation of topping bar, forming tops bar excavates the hole section;
B, before excavated surface enters rich water hole section, with tunnel according to ratio of slope less than 10% longitudinal gradient descending excavation, form the descending grade hole section of topping bar, it is terminal to design floor elevation with tunnel and flushes;
C, the ponding storehouse is set, in the scope of ponding storehouse, tunnel is carried out full face excavation, form the full face excavation section, its rich water hole of terminal next-door neighbour section in end one side of the descending grade hole section of topping bar;
D, water pump and drinking-water pipe are installed in described ponding storehouse, the water side of drinking-water pipe causes outside the hole;
E, according to interim along the slope to the rich water hole section excavation of topping bar, in digging process, arrange along the tunnel sidewall interim along sloping gutter, this gutter and the connection of ponding storehouse; Form the execution conditions of conventional tunnel;
F, excavation is finished and after connecting with tunnel downstream end of a year or month excavation face, be reversed getting out of a predicament or an embarrassing situation end of a year or month excavation according to tunnel design longitudinal gradient to treat to top bar rich water hole section.
As preferably, in step e, described interim ratio of slope along the slope is 0.15%～0.2%, and the tunnel height of its peak is 5～6m.
The invention has the beneficial effects as follows: the present invention is when tunnel excavation, according to landform and geology characteristic, top bar excavation section, the descending grade hole section of topping bar, full face excavation hole section and rich water hole section of construction successively, at last tunnel is reversed end of a year or month excavation, in the hole, also is furnished with the draining and the facility that draws water simultaneously.This method sequence of construction is reasonable, the underground water burst that discloses can be discharged outside the hole easily and effectively, thereby improve big section tunnel adverse grade water burst hole section efficiency of construction greatly, has improved construction environment.
Description of drawings
Fig. 1 is the layout schematic diagram of the embodiment of the invention.
Fig. 2 is the longitudinal section sectional view one of the embodiment of the invention.(excavation of topping bar)
Fig. 3 is the longitudinal section sectional view two of the embodiment of the invention.(excavation of getting out of a predicament or an embarrassing situation)
The specific embodiment
Fig. 1～Fig. 3 has shown the embodiment of the big section tunnel of the present invention in rich water hole section excavation adverse grade job practices, and its concrete construction sequence is as follows:
A, at first in the position that is higher than tunnel design floor elevation 11 to the tunnel excavation of topping bar, forming tops bar excavates hole section 1.(this moment, the excavated surface of tunnel did not also enter rich water hole section 4)
B, before excavated surface enters rich water hole section 4, with tunnel according to ratio of slope less than 10% longitudinal gradient descending excavation, form the descending grade hole section 2 of topping bar, the end of the descending grade hole section 2 of topping bar designs floor elevation 11 with tunnel and flushes.The excavation hole section 1 of promptly topping bar designs floor elevation 11 by descending grade hole section 2 descending grades to the tunnel of topping bar.(this moment, the excavated surface of tunnel did not enter rich water hole section 4 yet)
C, in end one side of the descending grade hole section 2 of topping bar ponding storehouse 5 is set, in the scope of ponding storehouse, tunnel is carried out full face excavation, form full face excavation section 3, the end of full face excavation section is close to rich water hole section 4.
D, water pump 6 and drinking-water pipe 7 are installed in described ponding storehouse 5, the water side of drinking-water pipe 7 causes outside the hole.
E, treat that the facility that draws water in the steps d forms pumpage after, according to interim along sloping i
FaceTo rich water hole section 4 excavation of topping bar, in digging process, arrange along the tunnel sidewall interim along sloping gutter 8, this gutter and 5 connections of ponding storehouse.(this moment, the excavated surface of tunnel entered rich water hole section 4 fully)
General interim along sloping i
FaceRatio of slope be 0.15%～0.2%, for making things convenient for mechanization supporting operation, interim along sloping i
FaceThe tunnel height of peak is advisable with 5～6m.
When top bar interim disclose underground water burst along slope excavation face 9 after, can drain into voluntarily in the ponding storehouse 5 along sloping gutter 8 along interim, again by water pump 6 along drinking-water pipe 7 pump drainages to the hole, the arrow among Fig. 1 is represented water (flow) direction.
F, as shown in Figure 3, excavation is finished and after tunnel connects, according to tunnel design longitudinal gradient i whole piece hole section (promptly top bar excavation hole section 1, the descending grade hole section 2 of topping bar and rich water hole section 4) is reversed getting out of a predicament or an embarrassing situation end of a year or month excavation to treat to top bar rich water hole section.Reference numeral 10 expressions among Fig. 3 are got out of a predicament or an embarrassing situation to feel at ease and are excavated face.
Claims (2)
1. one kind big section tunnel is characterized in that may further comprise the steps in rich water hole section excavation adverse grade job practices:
A, at first in the position that is higher than tunnel design floor elevation (11) to the tunnel excavation of topping bar, forming tops bar excavates hole section (1);
B, to enter rich water hole section (4) at excavated surface preceding, with tunnel according to ratio of slope less than 10% longitudinal gradient descending excavation, form the descending grade hole section (2) of topping bar, it is terminal to design floor elevation (11) with tunnel and flushes;
C, ponding storehouse (5) is set, in the scope of ponding storehouse, tunnel is carried out full face excavation, form full face excavation section (3), its terminal next-door neighbour's rich water hole section (4) in end one side of the descending grade hole section (2) of topping bar;
D, water pump (6) and drinking-water pipe (7) are installed in described ponding storehouse (5), the water side of drinking-water pipe (7) causes outside the hole;
E, according to interim along slope (i
Face) to rich water hole section (4) excavation of topping bar, in digging process, arrange temporarily along sloping gutter (8) along the tunnel sidewall, this gutter and ponding storehouse (5) connection form the execution conditions of conventional tunnel;
F, excavation is finished and after connecting with tunnel downstream end of a year or month excavation face (10), be reversed getting out of a predicament or an embarrassing situation end of a year or month excavation according to tunnel design longitudinal gradient (i) to treat to top bar rich water hole section.
2. big section tunnel according to claim 1 is characterized in that in rich water hole section excavation adverse grade job practices: among the step e, described interim along slope (i
Face) ratio of slope be 0.15%～0.2%, the tunnel height of its peak is 5～6m.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110162591 CN102296962B (en) | 2011-06-14 | 2011-06-14 | Adverse slope excavating construction method of large-section tunnel in water-rich tunnel section |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110162591 CN102296962B (en) | 2011-06-14 | 2011-06-14 | Adverse slope excavating construction method of large-section tunnel in water-rich tunnel section |
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| Publication Number | Publication Date |
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| CN102296962A CN102296962A (en) | 2011-12-28 |
| CN102296962B true CN102296962B (en) | 2013-07-24 |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105064280A (en) * | 2015-07-16 | 2015-11-18 | 中国水利水电第十四工程局有限公司 | Tunnel underground river water burst blockage construction method |
| CN108643920A (en) * | 2018-04-17 | 2018-10-12 | 贵州开磷集团股份有限公司 | A kind of blast working structure and construction method for the interim ditch in tunnel |
| CN109555528B (en) * | 2018-11-26 | 2019-10-11 | 中铁二十局集团有限公司 | Pass through that high angle is inverse to rush rich water richness sand tomography tunnel excavation and method for protecting support |
| CN113216123B (en) * | 2021-04-30 | 2024-03-22 | 中国葛洲坝集团第一工程有限公司 | Gate chamber side wall karst water gushing treatment method |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2760476B2 (en) * | 1994-05-19 | 1998-05-28 | 株式会社大林組 | Rock tunnel excavation method |
| JPH08270374A (en) * | 1995-03-31 | 1996-10-15 | Hazama Gumi Ltd | Blasting type tunnel construction method |
| CN1920254A (en) * | 2006-07-27 | 2007-02-28 | 董淑练 | Small pilot hole penetrated construction method when small pilot hole entering big pilot hole in two holes crossing in tunnel construction |
| CN100487224C (en) * | 2006-10-27 | 2009-05-13 | 中铁四局集团有限公司 | Rapid-construction method for rapid change of small-section into large-section tunnel |
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