CN103939106A - Construction method for converting two side-wall pilot tunnel method to CRD method - Google Patents

Construction method for converting two side-wall pilot tunnel method to CRD method Download PDF

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Publication number
CN103939106A
CN103939106A CN201410132331.0A CN201410132331A CN103939106A CN 103939106 A CN103939106 A CN 103939106A CN 201410132331 A CN201410132331 A CN 201410132331A CN 103939106 A CN103939106 A CN 103939106A
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interim
tunnel
conversion
progressively
crd
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CN201410132331.0A
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Chinese (zh)
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CN103939106B (en
Inventor
许崇帮
王华牢
赵旭
朱连臣
刘涛
汪成兵
周宁
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北京交科公路勘察设计研究院有限公司
北京工业大学
青岛建工集团有限公司
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Abstract

A construction method for converting a two side-wall pilot tunnel method to a CRD method includes the following steps that when the quality of surrounding rocks in front of a tunnel face is uniform wholly, conversion is achieved by moving a left side temporary middle wall and a right side temporary middle wall to the middle of a tunnel; when the quality of the surrounding rocks in front of the tunnel face is not uniform wholly, the surrounding rocks on one side are good in quality, and the surrounding rocks on the other side are broken, conversion is achieved by laterally moving the temporary middle wall on the single side. According to the method, reasonable construction conversion paths can be selected according to the geological condition and the topographic condition in the tunnel construction process, conversion control objects are clear, tunnel construction safety can be guaranteed, and construction efficiency is improved.

Description

A kind of double side wall pilot tunnel method is to the construction method of CRD method conversion

Technical field

The present invention relates to highway tunnel, city underground engineering technical field, especially relate to the construction method of a kind of double side wall pilot tunnel method to the conversion of CRD method.

Background technology

In the design and construction such as highway tunnel, city underground engineering, need select different construction methods according to the wall rock condition of tunnel structure span and construction exposure, and conversion method between different construction methods is always out in the cold, make in practice of construction engineering method conversion unorderedly follow, without Zhang Keyi, often make engineering method conversion and control too conservative, or engineering method transfer process construction risk is excessive, cause national wealth waste or property loss, casualties.

Summary of the invention

The object of the invention is to design the construction method of a kind of novel double side wall pilot tunnel method to the conversion of CRD method, address the above problem.

To achieve these goals, the technical solution used in the present invention is as follows:

Double side wall pilot tunnel method, to a construction method for CRD method conversion, comprises that step is as follows:

When tunnel tunnel face front quality of surrounding rock overall distribution is even, the temporarily middle wall in the employing left and right sides moves realization conversion simultaneously in the middle of tunnel;

When tunnel supremo's face quality of surrounding rock skewness, wherein a side quality is better, and opposite side country rock is when more broken, adopt one-sided interim in wall sidesway realize conversion.

When tunnel tunnel face front quality of surrounding rock overall distribution evenly, self is without significant difference on cross section, when surrounding rock stability is easier to control, its step is as follows:

The first step, during left side is interim wall and right side interim in wall all progressively move to center, tunnel, the interim inverted arch of left side base tunnel and the interim inverted arch of right side base tunnel along with the left and right sides interim in the progressively broadening of movement of wall, constriction progressively of the interim inverted arch of middle base tunnel;

Second step, when in described left side is interim, the interim middle wall in wall and described right side contacts, stops mobile;

The 3rd step, cancel the described right side of rear construction interim in wall, retain described left side interim in wall, described left side is interim in wall be converted to centre in CRD method interim in wall, complete engineering method conversion;

When tunnel supremo's face quality of surrounding rock skewness, wherein a side quality is better, and opposite side country rock is when more broken, and its step is as follows:

When tunnel tunnel face right front country rock is during than left front variance:

The first step, during right side is interim, wall remains unchanged, and during left side is interim, wall progressively moves to centre position, tunnel, the progressively broadening thereupon of the interim inverted arch of left side base tunnel, constriction progressively of the interim inverted arch of middle base tunnel;

Second step, in the time that the interim middle wall in described left side moves to centre position, stops moving, and interim described left side middle wall is converted to the interim middle wall in centre in CRD method;

The 3rd step, removes the interim middle wall in described right side, completes engineering method conversion;

When tunnel tunnel face left front country rock is during than right front variance:

The first step, during left side is interim, wall remains unchanged, and during right side is interim, wall progressively moves to centre position, the progressively broadening thereupon of the interim inverted arch of right side base tunnel, constriction progressively of the interim inverted arch of middle base tunnel;

Second step, in the time that the interim middle wall in described right side moves to centre position, stops moving, and interim described right side middle wall is converted to the interim middle wall in centre in CRD method;

The 3rd step, removes the interim middle wall in described left side, completes engineering method conversion;

When conversion, transformation segment length is controlled at 30-35m.

In constructing tunnel of the present invention, double side wall pilot tunnel method is to the construction method of CRD method conversion, can select corresponding translative mode according to tunnel tunnel face front Change in surrounding rocks situation, when tunnel tunnel face front Change in surrounding rocks evenly adopt the left and right sides interim in wall simultaneously to mobile conversion in the middle of tunnel., when the tunnel tunnel face front country rock left and right side difference in change opposite sex is large, adopt one-sided temporarily middle wall sidesway conversion, and by the method for the interim middle wall of progressive adjustments, make to excavate base tunnel and reach predetermined size, realize the progressively conversion of engineering method.This construction method is simple, can rationally utilize tunnel surrounding self bearing capacity simultaneously, effectively improves constructing tunnel efficiency and safety.

In the present invention, be to change progressive adjustments temporary support structures position according to wall rock condition, progressively change the mode of base tunnel span, realize double side wall pilot tunnel method and be converted to CRD method.If tunnel tunnel face front Change in surrounding rocks evenly adopts the middle mobile conversion to tunnel simultaneously of the interim middle wall in the left and right sides when construction of double side wall base tunnel.If the country rock left and right side difference in change opposite sex is large, adopt one-sided interim middle wall sidesway conversion.When the interim middle wall in a place reaches precalculated position in double side wall pilot tunnel method, remove the interim middle wall in another place and form CRD method.

The present invention relates to highway tunnel, city underground engineering, be particularly useful for that engineering structures span is large, the high underground construction of construction requirement of settlement control.For the conventional double side wall pilot tunnel method of highway tunnel and CRD method, the construction method of double side wall pilot tunnel method to the conversion of CRD method proposed, be that the safety conversion of two kinds of construction methods provides safeguard.The technical solution adopted for the present invention to solve the technical problems is: 1) determine the pattern of double side wall pilot tunnel method to the conversion of CRD method according to Change in surrounding rocks condition; 2) provide the path of double side wall pilot tunnel method to the conversion of CRD method according to translative mode.

Beneficial effect of the present invention can be summarized as follows:

1, the present invention can select reasonably construction transduction pathway according to geological conditions in constructing tunnel process and orographic condition, and the object of conversion and control is clear and definite, can ensure safety for tunnel engineering, improves efficiency of construction.

2, construction technology of the present invention is simple, and implementation cost is cheap.

Brief description of the drawings

Fig. 1 is double side wall pilot tunnel method structure chart

Fig. 2 is CRD method structure chart

Fig. 3 is two wall sidesways pattern conversion placed in the middle working drawing.

Fig. 4 is single wall lateral displacement mode conversion working drawing.

In Fig. 1,2,1 tunnel just serves as a contrast, 2 left sides interim in wall, 3 right sides interim in the middle of the interim inverted arch of base tunnel, the interim inverted arch of 6 right side base tunnel, 7 in the middle of wall, the interim inverted arch of 4 left side base tunnel, 5 in interim in lower base tunnels in the middle of top headings, 13 in the middle of base tunnel, 12 under base tunnel, 10 right side top headings, 11 right sides under walls, 8 left side top headings, 9 left sides.

Detailed description of the invention

In order to make technical problem solved by the invention, technical scheme and beneficial effect clearer, below in conjunction with drawings and Examples, the present invention is further elaborated.Should be appreciated that specific embodiment described herein, only in order to explain the present invention, is not intended to limit the present invention.

A kind of double side wall pilot tunnel method as shown in Figures 1 to 4, to the construction method of CRD method conversion, comprises that step is as follows:

When tunnel tunnel face front quality of surrounding rock overall distribution is even, the temporarily middle wall in the employing left and right sides moves realization conversion simultaneously in the middle of tunnel; When tunnel supremo's face quality of surrounding rock skewness, wherein a side quality is better, and opposite side country rock is when more broken, adopt one-sided interim in wall sidesway realize conversion.

In the embodiment being more preferably:

When tunnel tunnel face front quality of surrounding rock overall distribution evenly, self on cross section without significant difference, when surrounding rock stability is easier to control, its step is as follows: the first step, during left side is interim, the interim middle wall 3 in wall 2 and right side all progressively moves to center, tunnel, the left side interim inverted arch 4 of base tunnel and the interim inverted arch 6 of right side base tunnel along with the left and right sides interim in the progressively broadening of movement of wall, constriction progressively of the interim inverted arch of middle base tunnel; Second step, when in described left side is interim, the interim middle wall 3 in wall 2 and described right side contacts, stops mobile; The 3rd step, cancel the described right side of rear construction interim in wall 3, retain described left side interim in wall 2, described left side is interim in wall 2 be converted to centre in CRD method interim in wall 7, complete engineering method conversion;

When tunnel supremo's face quality of surrounding rock skewness, wherein a side quality is better, and opposite side country rock is when more broken, and its step is as follows:

When tunnel tunnel face right front country rock is during than left front variance,: the first step, during right side is interim, wall 3 remains unchanged, and during left side is interim, wall 2 progressively moves to centre position, tunnel, the interim inverted arch progressively broadening thereupon of left side base tunnel, progressively constriction of 5 of interim inverted arch of middle base tunnel; Second step, in the time that the interim middle wall 2 in described left side moves to centre position, stops moving, and interim described left side middle wall 2 is converted to the interim middle wall 7 in centre in CRD method; The 3rd step, removes the interim middle wall 3 in described right side, completes engineering method conversion;

When tunnel tunnel face left front country rock is during than right front variance,: the first step, during left side is interim, wall 2 remains unchanged, and during right side is interim, wall 3 progressively moves to centre position, the progressively broadening thereupon of the interim inverted arch of right side base tunnel, progressively constriction of 5 of interim inverted arch of middle base tunnel; Second step, in the time that the interim middle wall 3 in described right side moves to centre position, stops moving, and interim described right side middle wall 3 is converted to the interim middle wall 7 in centre in CRD method; The 3rd step, removes the interim middle wall 2 in described left side, completes engineering method conversion;

In the embodiment being more preferably: when conversion, transformation segment length is controlled at 30-35m.

In certain preferred embodiment:

As shown in Figure 3, suppose tunnel tunnel face right front, left front Change in surrounding rocks same difference, during left side is interim, wall 2, the interim middle wall 3 in right side progressively move (seeing Fig. 3 (2)) to centre position, the interim inverted arch 4 of left side base tunnel, the interim inverted arch 6 of right side base tunnel are along with the movement of the interim middle wall in the left and right sides progressively increases, and 5 of the interim inverted arch of middle base tunnel progressively shorten (seeing Fig. 3 (2)).When in left side is interim, wall, the interim middle wall in right side contact (seeing Fig. 3 (3)), stop mobile; Cancel the temporarily middle wall 3 in right side of rear construction, on the left of retaining, interim middle wall 2(is now converted to middle interim middle wall 7), complete engineering method conversion (seeing Fig. 3 (4)).Transformation segment length should be controlled at 30-35m.

As shown in Figure 4, suppose that tunnel tunnel face right front country rock is more poor than left front, during right side is interim, wall 3 remains unchanged, during left side is interim, wall 2 progressively moves (seeing Fig. 4 (2)) to centre position, the interim inverted arch 4 of left side base tunnel progressively increases thereupon, and 5 of the interim inverted arch of middle base tunnel progressively shorten (seeing Fig. 4 (2)).In the time that the interim middle wall 2 in left side moves to centre position, stop mobile (in interim now, wall 2 is converted to middle interim middle wall 7) (seeing Fig. 4 (3)), remove the interim middle wall in right side, complete engineering method conversion (seeing Fig. 4 (4)).Transformation segment length should be controlled at 30-35m.

More than by the detailed description of concrete and preferred embodiment the present invention; but those skilled in the art should be understood that; the present invention is not limited to the above embodiment; within the spirit and principles in the present invention all; any amendment of doing, be equal to replacement etc., within protection scope of the present invention all should be included in.

Claims (3)

1. double side wall pilot tunnel method, to a construction method for CRD method conversion, is characterized in that, comprises that step is as follows:
When tunnel tunnel face front quality of surrounding rock overall distribution is even, the temporarily middle wall in the employing left and right sides moves realization conversion simultaneously in the middle of tunnel;
When tunnel supremo's face quality of surrounding rock skewness, wherein a side quality is better, and opposite side country rock is when more broken, adopt one-sided interim in wall sidesway realize conversion.
2. double side wall pilot tunnel method according to claim 1, to the construction method of CRD method conversion, is characterized in that:
When tunnel tunnel face front quality of surrounding rock overall distribution evenly, self is without significant difference on cross section, when surrounding rock stability is easier to control, its step is as follows:
The first step, during left side is interim wall and right side interim in wall all progressively move to center, tunnel, the interim inverted arch of left side base tunnel and the interim inverted arch of right side base tunnel along with the left and right sides interim in the progressively broadening of movement of wall, constriction progressively of the interim inverted arch of middle base tunnel;
Second step, when in described left side is interim, the interim middle wall in wall and described right side contacts, stops mobile;
The 3rd step, cancel the described right side of rear construction interim in wall, retain described left side interim in wall, described left side is interim in wall be converted to centre in CRD method interim in wall, complete engineering method conversion;
When tunnel supremo's face quality of surrounding rock skewness, wherein a side quality is better, and opposite side country rock is when more broken, and its step is as follows:
When tunnel tunnel face right front country rock is during than left front variance:
The first step, during right side is interim, wall remains unchanged, and during left side is interim, wall progressively moves to centre position, tunnel, the progressively broadening thereupon of the interim inverted arch of left side base tunnel, constriction progressively of the interim inverted arch of middle base tunnel;
Second step, in the time that the interim middle wall in described left side moves to centre position, stops moving, and interim described left side middle wall is converted to the interim middle wall in centre in CRD method;
The 3rd step, removes the interim middle wall in described right side, completes engineering method conversion;
When tunnel tunnel face left front country rock is during than right front variance:
The first step, during left side is interim, wall remains unchanged, and during right side is interim, wall progressively moves to centre position, the progressively broadening thereupon of the interim inverted arch of right side base tunnel, constriction progressively of the interim inverted arch of middle base tunnel;
Second step, in the time that the interim middle wall in described right side moves to centre position, stops moving, and interim described right side middle wall is converted to the interim middle wall in centre in CRD method;
The 3rd step, removes the interim middle wall in described left side, completes engineering method conversion.
3. double side wall pilot tunnel method according to claim 1, to the construction method of CRD method conversion, is characterized in that: when conversion, transformation segment length is controlled at 30-35m.
CN201410132331.0A 2014-04-03 2014-04-03 A kind of double side wall pilot tunnel method is to the construction method of CRD method conversion CN103939106B (en)

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Cited By (10)

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Publication number Priority date Publication date Assignee Title
CN104631475A (en) * 2015-01-20 2015-05-20 中铁隧道集团有限公司杭州公司 Safe and fast construction method of down-traversing river shallow depth bored tunnel
CN106246191A (en) * 2016-08-22 2016-12-21 北京市市政工程研究院 A kind of hole body is dredged deeply, filling is plentiful large-scale karst cave treatment and tunnel excavation method
CN106246192A (en) * 2016-08-22 2016-12-21 北京市政路桥股份有限公司 Large-scale karst cave treatment under a kind of tunnel basis and base plate and tunnel excavation method
CN106640093A (en) * 2017-01-11 2017-05-10 中铁四局集团第工程有限公司 Tunnel excavating face blasting construction method
CN106761779A (en) * 2017-01-24 2017-05-31 中铁二十局集团第六工程有限公司 A kind of shallow-depth-excavation tunnel passes through the construction method of box culvert
CN107490336A (en) * 2017-08-22 2017-12-19 浙江工业大学 A kind of experimental provision and test method of simulation CRD method constructing tunnels
CN107605490A (en) * 2017-08-28 2018-01-19 中交第二航务工程局有限公司 Single hole large cross-section tunnel double side wall construction conversion process
CN109611101A (en) * 2018-12-04 2019-04-12 中铁二十四局集团有限公司 A kind of section in Tunneling by mining method converts construction technology
CN109989757A (en) * 2019-04-03 2019-07-09 长安大学 Super-span tunnel is in V grade of engineering method conversion construction method to IV grade of country rock section
CN110454171A (en) * 2019-08-21 2019-11-15 中铁隧道局集团有限公司 It is constructed from benching tunnelling method to the conversion method of two side-wall pilot tunnel construction in hole

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Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104631475A (en) * 2015-01-20 2015-05-20 中铁隧道集团有限公司杭州公司 Safe and fast construction method of down-traversing river shallow depth bored tunnel
CN106246191A (en) * 2016-08-22 2016-12-21 北京市市政工程研究院 A kind of hole body is dredged deeply, filling is plentiful large-scale karst cave treatment and tunnel excavation method
CN106246192A (en) * 2016-08-22 2016-12-21 北京市政路桥股份有限公司 Large-scale karst cave treatment under a kind of tunnel basis and base plate and tunnel excavation method
CN106246191B (en) * 2016-08-22 2018-10-30 北京市市政工程研究院 A kind of hole body is dredged, fills plentiful large-scale karst cave treatment and tunnel excavation method deeply
CN106640093A (en) * 2017-01-11 2017-05-10 中铁四局集团第工程有限公司 Tunnel excavating face blasting construction method
CN106761779A (en) * 2017-01-24 2017-05-31 中铁二十局集团第六工程有限公司 A kind of shallow-depth-excavation tunnel passes through the construction method of box culvert
CN106761779B (en) * 2017-01-24 2019-02-15 中铁二十局集团第六工程有限公司 A kind of shallow-depth-excavation tunnel passes through the construction method of box culvert
CN107490336A (en) * 2017-08-22 2017-12-19 浙江工业大学 A kind of experimental provision and test method of simulation CRD method constructing tunnels
CN107490336B (en) * 2017-08-22 2019-04-09 浙江工业大学 A kind of experimental provision and test method for simulating CRD method constructing tunnel
CN107605490A (en) * 2017-08-28 2018-01-19 中交第二航务工程局有限公司 Single hole large cross-section tunnel double side wall construction conversion process
CN107605490B (en) * 2017-08-28 2018-11-09 中交第二航务工程局有限公司 Single hole large cross-section tunnel double side wall construction conversion process
CN109611101A (en) * 2018-12-04 2019-04-12 中铁二十四局集团有限公司 A kind of section in Tunneling by mining method converts construction technology
CN109989757A (en) * 2019-04-03 2019-07-09 长安大学 Super-span tunnel is in V grade of engineering method conversion construction method to IV grade of country rock section
CN110454171A (en) * 2019-08-21 2019-11-15 中铁隧道局集团有限公司 It is constructed from benching tunnelling method to the conversion method of two side-wall pilot tunnel construction in hole

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