CN101725358A - Excavation construction method of ultra-shallow buried uneven weathered stratum of tunnel - Google Patents

Excavation construction method of ultra-shallow buried uneven weathered stratum of tunnel Download PDF

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Publication number
CN101725358A
CN101725358A CN200810143470A CN200810143470A CN101725358A CN 101725358 A CN101725358 A CN 101725358A CN 200810143470 A CN200810143470 A CN 200810143470A CN 200810143470 A CN200810143470 A CN 200810143470A CN 101725358 A CN101725358 A CN 101725358A
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CN
China
Prior art keywords
construction
excavation
tunnel
stage
appearing
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CN200810143470A
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Chinese (zh)
Inventor
付志刚
申传喜
彭青
李为强
李波
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中铁四局集团有限公司
中铁四局集团第二工程有限公司
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Application filed by 中铁四局集团有限公司, 中铁四局集团第二工程有限公司 filed Critical 中铁四局集团有限公司
Priority to CN200810143470A priority Critical patent/CN101725358A/en
Publication of CN101725358A publication Critical patent/CN101725358A/en

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Abstract

The invention relates to an excavation construction method of an ultra-shallow buried uneven weathered stratum of a tunnel. A segmented step method is used for construction, and a tunnel section is divided into a left side of an upper station, a right side of the upper station, a middle station and a lower station; each segment of step is sequentially constructed circularly, one-time excavation length of each segment of step is not larger than 30m preferably, and a middle partition wall is changed into a straight wall from the traditional curved wall at the left side of the upper station. Thus, for the uneven weathered stratum in the shallow buried area of wall rocks, the dynamic construction method using the segmented step method has little process interference, reduces the construction cost, has simple operation, safety, reliability, less temporary support, low fund investment and high construction speed, is suitable for large machinery for construction, and ensures that the whole construction process is in a safe, stable, high-quality and high-speed controllable state.

Description

The ultra-shallow buried uneven weathered stratum of tunnel excavation construction method

Technical field:

The present invention relates to a kind of tunnel excavation job practices, refer to a kind of excavation construction method that is applicable to ultra-shallow buried uneven weathered stratum of tunnel especially.

Background technology:

The tunnel excavation job practices is commonly used double side wall pilot tunnel method, median septum method, the median septum method etc. of intersecting.The median septum method is mainly used in double track tunnel IV level country rock buried hard rock location and location, strong yellow soil tunnel (IV level country rock).The median septum method of intersecting is mainly used in the buried soft rock of IV level country rock, shallow embedding, bias voltage location and the buried location of V level country rock.Thereby these two kinds of job practicess all can't be applied to V level country rock shallow embedding location.Though the double side wall pilot tunnel method is mainly used in the shallow embedding of V level country rock, bias voltage and hole section, it is the base tunnel of first tunneling both sides, and carries out preliminary bracing, again the method for partial excavation remainder.When edpth of tunnel 6-21 rice only, and the stratum in country rock shallow embedding location is mainly mud stone, during the uneven weathered stratum of argillaceous sandstone and chiltern mud stone, because the geology of this section is bad: uneven weathered red beds solution cavity and crack cavern water, karst are comparatively grown, the many fillings of solution cavity, solution cavity scale are 1.0-5.2 rice; Add uneven weathered trough valley and easily cause the unstability of caving in, underground water infiltration etc.; Thereby, exist edpth of tunnel shallow, the construction geology condition is poor, and security risk is big, the duration problem of big pressure.And tunnel portal is in the deep foundation ditch, adopts double side wall base tunnel rule to advance very difficulty of hole.

Summary of the invention:

Technical problem to be solved by this invention is: at above-mentioned the deficiencies in the prior art, providing a kind of is applicable to shallow buried uneven weathered stratum and advances the ultra-shallow buried uneven weathered stratum of tunnel excavation construction method that excavates in the hole from the arch, it is simple to operate, safe and reliable, and suitable big machinery is constructed.

In order to solve the problems of the technologies described above, the technical solution adopted in the present invention is: a kind of ultra-shallow buried uneven weathered stratum of tunnel excavation construction method, it adopts the construction of branch benching tunnelling method, at first tunnel cross-section is divided into four parts: the left side of appearing on the stage, the right side of appearing on the stage, Zhong Tai, and leave from office; Concrete construction sequence is as follows:

1), arch advance support: utilize the upright steelframe of a last circulation frame to apply advance support;

2), excavate the left side 2 of appearing on the stage:

Excavate the left side 2 of appearing on the stage, excavation ring width 0.5-1m causes surface subsidence for reducing tunnel deformation, and ensures construction safety, carry out the preliminary bracing and the mid-board temporary lining of barrel structure, promptly just spray the thick concrete of 4cm, the upright tunnel of frame steelframe, (comprising the interim steelframe of base tunnel), and lock foot anchoring stock is set, multiple pneumatically placed concrete is to design thickness after being drilled with radially anchor pole, and the bottom steelframe is just setting up behind the pneumatically placed concrete, sets up the back pneumatically placed concrete sealing again that finishes; And mid-board changed into stalk by former bent wall, like this, more convenient, quick when other worker's methods CRD, CD and the conversion of three steps.

3), excavate the right side of appearing on the stage:

The excavation right side of appearing on the stage, the right side of the appearing on the stage left side 5-10m that appears on the stage that lags behind, excavation ring width 0.5-1m, the interim steelframe of mid-board part has been constructed and has been finished, and applies preliminary bracing, and interim inverted arch is set up according to the base plate geological condition.Length of bench is not more than 10m.

Adopt the hand excavation to reserve core soil when appearing on the stage, all adopt artificial muck removal to soil property.

4), platform in the excavation:

Top bar construction to suitable distance back (generally being not more than 10m), platform in the excavation, about the excavation that staggers, apply preliminary bracing, i.e. the first thick concrete of spray 4cm, frame founds steelframe, is drilled with behind the system anchor bolt again pneumatically placed concrete to design thickness.Length of bench is about 10m.

5), excavation is left office:

Excavation is left office, sealing preliminary bracing Cheng Huan, and inverted arch in time follows up, and fills at the bottom of the placing tunnel, utilizes the disposable placing secondary lining of lining shuttering chassis, and the arch wall lining cutting once applies.

In the construction, the construction that circulates successively of each step, each step once excavates length should not be greater than 30m, and strengthens construction monitoring and instruct site operation, measures frequency every day 1-2 time.The working procedure and the execution conditions of above-mentioned preliminary bracing and temporary lining are same as the prior art.

So, uneven weathered stratum in country rock shallow embedding location, adopt Dynamic Construction worker's method of above-mentioned branch benching tunnelling method, operation is disturbed few, has reduced construction costs, and this job practices is simple to operate, safe and reliable, suitable big machinery is constructed, and temporary lining is few, drop into economic lacking, speed of application is fast; Guaranteed that construction overall process is in safety, stable, high-quality, controllable state fast.

Description of drawings:

Fig. 1 is a working procedure of the present invention cross section schematic diagram.

Fig. 2 is a working procedure vertical section schematic diagram of the present invention.

The specific embodiment:

Referring to Figure 1 and Figure 2, for the present invention in shallow buried uneven weathered stratum, the ultra-shallow buried uneven weathered stratum of tunnel excavation construction method that excavates in the hole is advanced in employing from the arch, it adopts the construction of branch benching tunnelling method, at first tunnel cross-section is divided into four parts: the left side 1 of appearing on the stage, the right side 2 of appearing on the stage, middle platform 3, and leave office 4; Concrete construction sequence is as follows:

1), arch advance support 5 (leading pre-reinforcing of φ 108 pipe canopies):

Take the leading 108 long tube canopies encrypted in the 140 ° of scopes in arch, tunnel, length 20-40m, circumferential distance 40cm, long tube canopy overlap joint 4-5m between every circulation.Be aided with φ 42 leading ductule 1.5m one rings that long 3.5m encrypts in the excavation.Leading long tube canopy level sets, and establishes the guiding wall, and level plugs the long tube canopy.

2), excavate the left side 1 of appearing on the stage:

Excavate the left side 1 of appearing on the stage, excavation ring width 0.5-1m, cause surface subsidence for reducing tunnel deformation, and guarantee construction safety, apply the preliminary bracing and mid-board 6 temporary linings of barrel structure, spraying concrete thickness is 35cm, and steelframe is I 25 i iron, interim inverted arch adopts I 22 i iron, sprays the thick 28cm of concrete; Mid-board 6 adopts I 22 i iron, sprays the thick 22cm of concrete.And lock foot anchoring stock is set, and promptly add φ 50 lock pin anchor tubes 7, add 4 under every Pin steelframe.Arch springing place excavation face amplifies, and adopts the spray of injection concrete full.

3), excavate the right side 2 of appearing on the stage:

Excavate the right side 2 of appearing on the stage, 5-10m on the left of the right side of appearing on the stage lags behind and appears on the stage, excavation length is not more than 10m, applies preliminary bracing, and interim inverted arch is set up according to the base plate geological condition.

Adopt the hand excavation to reserve core soil when appearing on the stage, all adopt artificial muck removal to soil property.

4), platform 3 in the excavation:

Platform in the excavation, excavation length is 10m, applies preliminary bracing.Middle platform can apply mid-board and interim inverted arch according to geological condition.

5), excavation leaves office 4:

Excavation is left office, sealing preliminary bracing Cheng Huan, and inverted arch in time follows up, and fills 8 at the bottom of the placing tunnel, utilizes the disposable placing secondary lining 9 of lining shuttering chassis, and the arch wall lining cutting once applies.The every 2-3m of inverted arch supporting constructs once, and inverted arch lining cutting 5m once.

In the construction, each step circulation construction, each step once excavates length should not be greater than 30m, and the reinforcement construction monitoring measures, surface subsidence, vault sink and horizontal clearance convergence 5m is provided with a section, measuring point is arranged on the same section in surface subsidence point and the hole, measurement frequency every day 1-2 time.

Claims (2)

1. ultra-shallow buried uneven weathered stratum of tunnel excavation construction method is characterized in that: adopt branch's benching tunnelling method construction, at first tunnel cross-section is divided into four parts: the left side of appearing on the stage, the right side of appearing on the stage, Zhong Tai, and leave from office; Concrete construction sequence is as follows:
1), arch advance support;
2), the excavation left side of appearing on the stage: excavation ring width 0.5-1m applies the preliminary bracing of barrel structure and is the temporary lining of the mid-board of stalk, and lock foot anchoring stock is set;
3), the excavation right side of appearing on the stage: the right side of the appearing on the stage left side 5-10m that appears on the stage that lags behind, excavation length is not more than 10m, applies preliminary bracing;
4), platform in the excavation: excavation length is not more than 10m, applies preliminary bracing;
5), excavation is left office: excavation length is 2-3m, seals preliminary bracing Cheng Huan, and inverted arch in time follows up, filling, secondary lining at the bottom of the placing tunnel;
In the construction, the construction that circulates successively of each step, each step once excavates length and is not more than 30m, and strengthens construction monitoring and measure.
2. ultra-shallow buried uneven weathered stratum of tunnel excavation construction method according to claim 1 is characterized in that: being set to of described lock foot anchoring stock adds lock pin anchor tube, adds 4 under every Pin steelframe.
CN200810143470A 2008-10-31 2008-10-31 Excavation construction method of ultra-shallow buried uneven weathered stratum of tunnel CN101725358A (en)

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Application Number Priority Date Filing Date Title
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Cited By (25)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102003187A (en) * 2010-10-13 2011-04-06 中国水电顾问集团华东勘测设计研究院 Construction method of under cutting excavation supporting of of deeply buried soft-rock large tunnel
CN102061923A (en) * 2010-11-28 2011-05-18 山东科技大学 Tunnel construction method capable of protecting existing building
CN102182469A (en) * 2011-05-04 2011-09-14 中铁三局集团有限公司 Construction method for preventing cracking of second lining of middle cavity of large span tunnel
CN102226399A (en) * 2011-06-02 2011-10-26 中铁二院工程集团有限责任公司 Soft rock four-line large-span tunnel three-bench cable-bracing excavation construction method
CN102305091A (en) * 2011-08-25 2012-01-04 中铁十六局集团有限公司 Support structure for hard rock large-section tunnel construction, and construction method for support structure
CN102312672A (en) * 2011-09-23 2012-01-11 中南大学 Fast large-cross-section tunnel construction method adapting to complicated and variable geological conditions
CN102392651A (en) * 2011-11-30 2012-03-28 中铁五局(集团)有限公司 Completely weathered granite tunnel excavation construction method
CN102562075A (en) * 2012-03-09 2012-07-11 中交第二公路工程局有限公司 Large cross-section weak surrounding rock tunnel three-step and six-part short-distance construction method
CN102562076A (en) * 2011-12-23 2012-07-11 中铁十九局集团第五工程有限公司 Underground excavation construction technology for large cross-section subway station under geological condition of soft upper layer and hard lower layer
CN102587924A (en) * 2012-03-26 2012-07-18 中铁十三局集团第四工程有限公司 Construction method for shallow-buried high-water-content clayed soil tunnel
CN102767379A (en) * 2012-08-10 2012-11-07 中国建筑第四工程局有限公司 Shallow-buried unsymmetrical pressure section tunnel drilling construction method
CN102817621A (en) * 2012-08-13 2012-12-12 中铁十二局集团有限公司 Comprehensive construction method applicable to controlling arch basement sedimentation for tunnel in unfavorable geological conditions
CN103899318A (en) * 2014-03-17 2014-07-02 神华包神铁路有限责任公司 Medium ground tunnel milling excavating and mating mechanized construction method
CN104154326A (en) * 2014-08-14 2014-11-19 中石化第十建设有限公司 Rigid sleeve head for desert and silt geology jacking pipe and jacking pipe construction method thereof
CN104314571A (en) * 2014-08-19 2015-01-28 西安建筑科技大学 Construction method for three-step six-step ultrashort step for large-section tunnel
CN104533428A (en) * 2014-11-28 2015-04-22 大连市市政设计研究院有限责任公司 Steep cliff tunnel hole excavation construction method
CN104564085A (en) * 2014-12-23 2015-04-29 中铁十一局集团第五工程有限公司 Comprehensive construction method for excavating tunnel with super large cross-section under urban super shallow-buried condition
CN105156121A (en) * 2015-10-08 2015-12-16 中铁二十五局集团第五工程有限公司 Construction method of large-cross section loess tunnel cave entering shallow buried section
CN105525618A (en) * 2015-09-08 2016-04-27 浙江中林勘察研究股份有限公司 Arched foundation pit retaining structure and construction method thereof
CN106121659A (en) * 2016-06-27 2016-11-16 中交公局第三工程有限公司 The narrow-bore tunnel excavation method of major urban arterial highway upper-soft lower-hard ground is worn under one
CN106979013A (en) * 2017-04-07 2017-07-25 中交第二航务工程局有限公司 A kind of excavation construction method for the large section tunnel for biasing Shallow-Buried Soft Rock
CN107288652A (en) * 2017-08-22 2017-10-24 中铁五局集团有限公司 A kind of five excavation construction methods of three step of light section Support System in Soft Rock Tunnels
CN107905814A (en) * 2017-10-20 2018-04-13 长安大学 Large span loess tunnel top bar CD construction methods
CN108488121A (en) * 2018-02-12 2018-09-04 宝鸡石油机械有限责任公司 A kind of board migration device hydraulic pressure is from ambulation control method and control system
CN109630140A (en) * 2018-12-14 2019-04-16 广西大学 The dynamic partition pilot tunnel method on big cross section gradual change Soft Rock Tunnel stratum

Cited By (31)

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Publication number Priority date Publication date Assignee Title
CN102003187A (en) * 2010-10-13 2011-04-06 中国水电顾问集团华东勘测设计研究院 Construction method of under cutting excavation supporting of of deeply buried soft-rock large tunnel
CN102061923B (en) * 2010-11-28 2013-06-05 山东科技大学 Tunnel construction method capable of protecting existing building
CN102061923A (en) * 2010-11-28 2011-05-18 山东科技大学 Tunnel construction method capable of protecting existing building
CN102182469A (en) * 2011-05-04 2011-09-14 中铁三局集团有限公司 Construction method for preventing cracking of second lining of middle cavity of large span tunnel
CN102226399A (en) * 2011-06-02 2011-10-26 中铁二院工程集团有限责任公司 Soft rock four-line large-span tunnel three-bench cable-bracing excavation construction method
CN102305091A (en) * 2011-08-25 2012-01-04 中铁十六局集团有限公司 Support structure for hard rock large-section tunnel construction, and construction method for support structure
CN102312672A (en) * 2011-09-23 2012-01-11 中南大学 Fast large-cross-section tunnel construction method adapting to complicated and variable geological conditions
CN102392651A (en) * 2011-11-30 2012-03-28 中铁五局(集团)有限公司 Completely weathered granite tunnel excavation construction method
CN102392651B (en) * 2011-11-30 2014-10-22 中铁五局(集团)有限公司 Completely weathered granite tunnel excavation construction method
CN102562076A (en) * 2011-12-23 2012-07-11 中铁十九局集团第五工程有限公司 Underground excavation construction technology for large cross-section subway station under geological condition of soft upper layer and hard lower layer
CN102562075A (en) * 2012-03-09 2012-07-11 中交第二公路工程局有限公司 Large cross-section weak surrounding rock tunnel three-step and six-part short-distance construction method
CN102562075B (en) * 2012-03-09 2014-06-11 中交第二公路工程局有限公司 Large cross-section weak surrounding rock tunnel three-step and six-part short-distance construction method
CN102587924A (en) * 2012-03-26 2012-07-18 中铁十三局集团第四工程有限公司 Construction method for shallow-buried high-water-content clayed soil tunnel
CN102767379A (en) * 2012-08-10 2012-11-07 中国建筑第四工程局有限公司 Shallow-buried unsymmetrical pressure section tunnel drilling construction method
CN102817621A (en) * 2012-08-13 2012-12-12 中铁十二局集团有限公司 Comprehensive construction method applicable to controlling arch basement sedimentation for tunnel in unfavorable geological conditions
CN103899318A (en) * 2014-03-17 2014-07-02 神华包神铁路有限责任公司 Medium ground tunnel milling excavating and mating mechanized construction method
CN103899318B (en) * 2014-03-17 2016-03-02 神华包神铁路有限责任公司 The milling of medium ground tunnel is dug and supporting machinery construction
CN104154326A (en) * 2014-08-14 2014-11-19 中石化第十建设有限公司 Rigid sleeve head for desert and silt geology jacking pipe and jacking pipe construction method thereof
CN104314571A (en) * 2014-08-19 2015-01-28 西安建筑科技大学 Construction method for three-step six-step ultrashort step for large-section tunnel
CN104533428B (en) * 2014-11-28 2018-02-13 大连市市政设计研究院有限责任公司 A kind of steep cliffs tunnel outlet engineering method
CN104533428A (en) * 2014-11-28 2015-04-22 大连市市政设计研究院有限责任公司 Steep cliff tunnel hole excavation construction method
CN104564085A (en) * 2014-12-23 2015-04-29 中铁十一局集团第五工程有限公司 Comprehensive construction method for excavating tunnel with super large cross-section under urban super shallow-buried condition
CN105525618A (en) * 2015-09-08 2016-04-27 浙江中林勘察研究股份有限公司 Arched foundation pit retaining structure and construction method thereof
CN105156121A (en) * 2015-10-08 2015-12-16 中铁二十五局集团第五工程有限公司 Construction method of large-cross section loess tunnel cave entering shallow buried section
CN106121659A (en) * 2016-06-27 2016-11-16 中交公局第三工程有限公司 The narrow-bore tunnel excavation method of major urban arterial highway upper-soft lower-hard ground is worn under one
CN106979013A (en) * 2017-04-07 2017-07-25 中交第二航务工程局有限公司 A kind of excavation construction method for the large section tunnel for biasing Shallow-Buried Soft Rock
CN107288652A (en) * 2017-08-22 2017-10-24 中铁五局集团有限公司 A kind of five excavation construction methods of three step of light section Support System in Soft Rock Tunnels
CN107905814A (en) * 2017-10-20 2018-04-13 长安大学 Large span loess tunnel top bar CD construction methods
CN107905814B (en) * 2017-10-20 2019-08-13 长安大学 Large span loess tunnel top bar CD construction method
CN108488121A (en) * 2018-02-12 2018-09-04 宝鸡石油机械有限责任公司 A kind of board migration device hydraulic pressure is from ambulation control method and control system
CN109630140A (en) * 2018-12-14 2019-04-16 广西大学 The dynamic partition pilot tunnel method on big cross section gradual change Soft Rock Tunnel stratum

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Application publication date: 20100609