CN101769154A - Excavation supporting method for tunnel construction - Google Patents

Excavation supporting method for tunnel construction Download PDF

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Publication number
CN101769154A
CN101769154A CN200810191752A CN200810191752A CN101769154A CN 101769154 A CN101769154 A CN 101769154A CN 200810191752 A CN200810191752 A CN 200810191752A CN 200810191752 A CN200810191752 A CN 200810191752A CN 101769154 A CN101769154 A CN 101769154A
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CN
China
Prior art keywords
excavation
tunnel
construction
supporting
steelframe
Prior art date
Application number
CN200810191752A
Other languages
Chinese (zh)
Inventor
王化平
程文亮
刘平金
李志勇
秦建晟
安渊
王春立
Original Assignee
中铁六局集团呼和浩特铁路建设有限公司
中铁六局集团有限公司
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Application filed by 中铁六局集团呼和浩特铁路建设有限公司, 中铁六局集团有限公司 filed Critical 中铁六局集团呼和浩特铁路建设有限公司
Priority to CN200810191752A priority Critical patent/CN101769154A/en
Publication of CN101769154A publication Critical patent/CN101769154A/en

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Abstract

The invention discloses an excavation supporting method for tunnel construction. In the method, the tunnel is excavated in parts and blocks, arch part primary support and temporary steel frame support are erected to form reticular closed stable support system, and finally a complete tunnel section is formed, the excavation and support of each part are in vertical staggered manner along tunnel and are carried on through parallel advancing construction method. The excavation supporting method has large excavation part section, facilitates the operation of construction machinery, has simple primary-support process, easy operation, reduces the arch jack fabrication, anchor rod mounting and concrete spraying processes for middle partition and temporary inverted arch construction, reduces the construction period and the construction cost.

Description

A kind of excavation supporting method of constructing tunnel

Technical field

The present invention relates to a kind of excavation supporting method of constructing tunnel, refer in particular to the excavation supporting method that is applicable to ancient talus geology V, VI level surrounding rock tunnel, basalt geology tunnel.

Background technology

Earth surface exists a large amount of mountain ranges, and particularly China western part mainly is based on the mountain area.Because effects such as wind erosion, rainwater, earthquake make the massif avalanche form a large amount of talus geology sections.And railway, highway engineering, because the requirement of speed, line style will be passed through these talus geology sections with the form in tunnel inevitably.Ancient talus geology self-stable ability extreme difference, cohesion are poor, have differential settlement, belong to unstable rock mass.Under this geological conditions, in the constructing tunnel process, the reservoir stress redistribution, tunnel preliminary bracing structure is formed huge vertical and lateral pressure, if job practices is improper, will cause that preliminary bracing sinking and horizontal convergence value are excessive, cause the preliminary bracing structure to invade the secondary lining headroom.At present, the construction tunnel existence is faced a difficult choice in ancient talus geology, i.e. " excavation is difficult ", " supporting difficulty ".China's constructing tunnel excavation has multiple job practices, but is almost blank at ancient talus geology tunnel excavation supporting method, does not have written construction.How to make tunnel safety, pass through ancient talus geology, basalt geology apace, seek the new problem that a kind of job practices new under unfavorable geological condition is the tunnel safety construction works.

Summary of the invention

The technical problem to be solved in the present invention is the excavation supporting method that a kind of constructing tunnel is provided under unfavorable geological condition, and this method is to cooperate the temporary lining of cross steelframe on the basis of three bench excavation methods, just " cross steelframe supporting excavation method ".

Technical problem of the present invention is solved by following scheme: a kind of excavation supporting method of constructing tunnel, this method is to cooperate the temporary lining of cross steelframe on the basis of three bench excavation methods, it is characterized in that: in the tunnel excavation section, with tunnel branch piecemeal excavation, the first step tunneling arc base tunnel of topping bar applies the arch preliminary bracing and interim vertical steelframe supports; The middle step of the second step construction, one side also applies the preliminary bracing of sealing and connects that upright interim vertical steelframe supports, interim laterally steelframe supports, the middle step of tunneling opposite side and apply the preliminary bracing and the support of interim laterally steelframe of sealing; The 3rd step is two bottoms, bottom about excavation respectively, form tunnel preliminary bracing and interim vertical support net closed stablity supporting, form the support system of sealing, be combined into a complete tunnel cross-section at last, the excavation at each position vertically staggers along the tunnel with supporting, the job practices of parallel propelling is carried out.

Advantage of the present invention is: 1, excavation branch section is big, and enough construction machinery spaces are provided, and is convenient to the construction machinery operation, and construction machinery participates in construction, has reduced constructor's labour intensity, and efficiency of construction is provided, and has accelerated excavation speed.2, this method is different with conventional CRD excavation method job practices, top bar to adopt and once excavate moulding, can make the arch of topping bar once reach the design profile size, in time finish preliminary bracing, reduced secondary disturbance to the arch country rock, improve the self-stable ability of arch country rock, formed arch fast and be subjected to stress effect, guaranteed the safety of bottom construction and excavation.3, preliminary bracing operation is simple, and easy operating shortens preliminary bracing and performs the time, and the preliminary bracing moulding is fast.Preliminary bracing was shaped in the short period, had controlled the relaxation of deformation of country rock, made country rock become the ingredient of support system fast.4, this excavation supporting method is compared with CRD excavation method, median septum and interim inverted arch construct anchor pole when making and installing of needed bow member, the operation of sprayed mortar have been reduced, and remove required human and material resources, the time of median septum the shortcoming of also having avoided CRD excavation method median septum supporting excavation to be difficult to moulding simultaneously.This excavation supporting method greatly reduces construction cost, has shortened the construction period.5, this construction and excavation method both had been applicable to basalt, ancient talus geology V, the construction of VI level surrounding rock tunnel, also was applicable to the construction of loess tunnel and other unfavorable geology surrounding rock tunnel simultaneously.

Description of drawings

Fig. 1 is a construction flow chart of the present invention

Fig. 2 is a cross steelframe temporary lining excavation front schematic view

Fig. 3 is a cross steelframe method excavation floor map

The specific embodiment

The first step: the excavation supporting 1 of topping bar applies the 1. leading ductule of portion; 2 1. portion annular mechanical equivalent of light excavation, manual amendments, 1. portion's face sprays the concrete sealing, 3 1. portion just spray the thick concrete of 4cm; 4 1. portion hang steel mesh reinforcement; 5 1. portion install the preliminary bracing steelframe, install 1. portion's system anchor bolt and lock pin anchor tube; 6 1. portion's injection preliminary bracings; 7 excavate 1. portion's core soil, interim vertical steelframe supporting;

Second step: middle bench excavation supporting 1 is portion, 3. stagger excavation, manual amendment of portion's machinery 2.; 2 2. portion, 3. portion's face injection concrete sealings; 3 2. portion, 3. the thick concrete of 4cm is just sprayed in portion; 4 2. portion, 3. steel mesh reinforcement is hung by portion; 5 2. portion, 3. portion installs the preliminary bracing steelframe, installs 2. portion, 3. portion's system anchor bolt and lock pin anchor tube; 6 2. portion, 3. portion's injection preliminary bracings; 2. 7 excavate portion, the 3. core soil between the portion, connect interim in the vertical steelframe supporting of step; 2. 8 connect portion, the 3. interim laterally steelframe of portion.

The 3rd step: get out of a predicament or an embarrassing situation excavation supporting 1 4. portion, 5. stagger excavation, manual amendment of portion's machinery; 2 4. portion, 5. portion's face injection concrete sealings; 3 4. portion, 5. the thick concrete of 4cm is just sprayed in portion; 4 4. portion, 5. steel mesh reinforcement is hung by portion; 5 4. portion, 5. portion installs the preliminary bracing steelframe, installs 4. portion, 5. portion's system anchor bolt and lock pin anchor tube; 6 4. portion, 5. portion's injection preliminary bracings; 4. 7 excavate portion, the 5. core soil between the portion, connects the vertical steelframe supporting of temporarily getting out of a predicament or an embarrassing situation;

The 4th step: tunnel bottom excavation supporting 1 is portion, 7. stagger excavation, manual amendment of portion's machinery 6.; 2 6. portion, 7. the thick concrete of 4cm is just sprayed in portion; 3 excavations are reserved core soil at the bottom of the tunnels, connect vertical steelframe at the bottom of the tunnel; 4 6. portion, 7. portion installs the preliminary bracing steelframe; 5 6. portion, 7. portion's injection preliminary bracings;

The 5th step: laterally interim steelframe supporting is removed in inverted arch 1 segmentation of constructing, and to encircle the operation of inverted arch reinforcing bar binding be standard to the length of dismounting to satisfy one; 2 inverted arch reinforcing bar bindings; 3 formwork erections, installation waterstop; 4 inverted arch concretings;

The 6th goes on foot: vertical interim steelframe supporting is removed in 1 segmentation of arch wall lining construction, and removing length is standard can satisfy the operation of lining papers block; 2 lay hoop and longitudinal drainage pipe; Lay splash guard.3 reinforcing bar bindings are installed Grouting Pipe; 4 install end template and in buried, external labeling type waterstop; 5 primary concreting arch wall concrete.

Claims (1)

1. the excavation supporting method of a constructing tunnel, this method is to cooperate the temporary lining of cross steelframe on the basis of three bench excavation methods, it is characterized in that: in the tunnel excavation section, with tunnel branch piecemeal excavation, the first step tunneling arc base tunnel of topping bar applies the arch preliminary bracing and interim vertical steelframe supports; The middle step of the second step construction, one side also applies the preliminary bracing of sealing and connects that upright interim vertical steelframe supports, interim laterally steelframe supports, the middle step of tunneling opposite side and apply the preliminary bracing and the support of interim laterally steelframe of sealing; The 3rd step is two bottoms, bottom about excavation respectively, form tunnel preliminary bracing and interim vertical support net closed stablity supporting, form the support system of sealing, be combined into a complete tunnel cross-section at last, the excavation at each position vertically staggers along the tunnel with supporting, the job practices of parallel propelling is carried out.
CN200810191752A 2008-12-31 2008-12-31 Excavation supporting method for tunnel construction CN101769154A (en)

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Application Number Priority Date Filing Date Title
CN200810191752A CN101769154A (en) 2008-12-31 2008-12-31 Excavation supporting method for tunnel construction

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Cited By (24)

* 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
CN102022127A (en) * 2010-11-08 2011-04-20 中铁隧道集团有限公司 Arch center mounting device for construction of tunnel
CN102042019A (en) * 2010-11-11 2011-05-04 中铁十三局集团第四工程有限公司 Two-stair five-step excavation construction method for shallow-buried large-span soft plastic clay tunnel
CN102071947A (en) * 2011-01-21 2011-05-25 中交四航局第一工程有限公司 Construction method for soft surrounding rock section of large-span tunnel portal
CN102140918A (en) * 2011-04-01 2011-08-03 长安大学 Loess tunnel 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
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
CN103195455A (en) * 2013-03-11 2013-07-10 中铁二院工程集团有限责任公司 Large section tunnel construction support and protection system and construction method under flabby geological environment
CN103323279A (en) * 2013-06-21 2013-09-25 中国水电顾问集团华东勘测设计研究院 Test method for evaluating influence of size effect on tunnel excavation response
CN103590841A (en) * 2012-08-13 2014-02-19 上海市政工程设计研究总院(集团)有限公司 Supporting method for primary support of underground excavated chamber
CN103590834A (en) * 2013-11-21 2014-02-19 成都理工大学 Excavation and support method of asymmetric squeezing type deformation tunnel
CN104100272A (en) * 2014-07-11 2014-10-15 中国路桥工程有限责任公司 Quick construction method of tunnels traversing unfavorable geology
CN104389618A (en) * 2014-10-13 2015-03-04 中铁二院重庆勘察设计研究院有限责任公司 Method for constructing multiple-arch tunnel hole body large room-free pipe shed support
CN104533465A (en) * 2015-01-14 2015-04-22 中南大学 Temporary supporting structure for tunnel construction
CN104790978A (en) * 2015-03-10 2015-07-22 中铁九局集团有限公司 Small-clear-distance grade separation tunnel annular guide pit construction method
CN105134258A (en) * 2015-08-14 2015-12-09 中国建筑土木建设有限公司 Construction method by utilizing multiple steps and leg-locking of pipe shed for completely-weathered VI-grade surrounding rock of tunnel
CN105160111A (en) * 2015-09-11 2015-12-16 山西省交通科学研究院 Simulation method for loess tunnel numerical model by considering surrounding rock structural characteristics
CN105545323A (en) * 2015-12-07 2016-05-04 中交第二航务工程局有限公司 Construction method for open cut tunnel lining
CN105781573A (en) * 2016-03-18 2016-07-20 中铁九局集团第六工程有限公司 Railway down-traversing highway tunnel double-layer casing pipe reinforcement double-pipe shed follow-pipe drilling construction method
CN106121661A (en) * 2016-08-08 2016-11-16 中铁二局集团有限公司 A kind of tunnel trunk is by loess separating surface water rich strata construction method
CN106761769A (en) * 2016-11-23 2017-05-31 长安大学 A kind of construction technology of big cross section large-deformation tunnel in soft rock
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
CN107152283A (en) * 2017-07-11 2017-09-12 中交隧道工程局有限公司 It is a kind of in shallow tunnel weak surrounding rock use cross hang step excavation method
CN107401411A (en) * 2017-07-11 2017-11-28 中交隧道工程局有限公司 Step excavation construction method is strengthened in a kind of interim perpendicular support for being applied to IV grade of country rock Shallow depth bored tunnel

Cited By (34)

* 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
CN102022127A (en) * 2010-11-08 2011-04-20 中铁隧道集团有限公司 Arch center mounting device for construction of tunnel
CN102022127B (en) * 2010-11-08 2013-03-13 中铁隧道集团有限公司 Arch center mounting device for construction of tunnel
CN102042019A (en) * 2010-11-11 2011-05-04 中铁十三局集团第四工程有限公司 Two-stair five-step excavation construction method for shallow-buried large-span soft plastic clay tunnel
CN102042019B (en) * 2010-11-11 2012-12-19 中铁十三局集团第四工程有限公司 Two-stair five-step excavation construction method for shallow-buried large-span soft plastic clay tunnel
CN102071947A (en) * 2011-01-21 2011-05-25 中交四航局第一工程有限公司 Construction method for soft surrounding rock section of large-span tunnel portal
CN102071947B (en) * 2011-01-21 2013-02-06 中交四航局第一工程有限公司 Construction method for soft surrounding rock section of large-span tunnel portal
CN102140918A (en) * 2011-04-01 2011-08-03 长安大学 Loess tunnel 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
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
CN103590841B (en) * 2012-08-13 2017-02-08 上海市政工程设计研究总院(集团)有限公司 Supporting method for primary support of underground excavated chamber
CN103590841A (en) * 2012-08-13 2014-02-19 上海市政工程设计研究总院(集团)有限公司 Supporting method for primary support of underground excavated chamber
CN103195455A (en) * 2013-03-11 2013-07-10 中铁二院工程集团有限责任公司 Large section tunnel construction support and protection system and construction method under flabby geological environment
CN103195455B (en) * 2013-03-11 2016-05-11 中铁二院工程集团有限责任公司 Weak geological environment large cross-section tunnel construction supporting system and construction method
CN103323279B (en) * 2013-06-21 2015-11-18 中国水电顾问集团华东勘测设计研究院 Evaluate the test method of size effect on tunnel excavation response impact
CN103323279A (en) * 2013-06-21 2013-09-25 中国水电顾问集团华东勘测设计研究院 Test method for evaluating influence of size effect on tunnel excavation response
CN103590834B (en) * 2013-11-21 2016-03-09 成都理工大学 The excavation supporting method of Non-symmetric Extrusion type deformation tunnel
CN103590834A (en) * 2013-11-21 2014-02-19 成都理工大学 Excavation and support method of asymmetric squeezing type deformation tunnel
CN104100272A (en) * 2014-07-11 2014-10-15 中国路桥工程有限责任公司 Quick construction method of tunnels traversing unfavorable geology
CN104389618A (en) * 2014-10-13 2015-03-04 中铁二院重庆勘察设计研究院有限责任公司 Method for constructing multiple-arch tunnel hole body large room-free pipe shed support
CN104533465A (en) * 2015-01-14 2015-04-22 中南大学 Temporary supporting structure for tunnel construction
CN104790978A (en) * 2015-03-10 2015-07-22 中铁九局集团有限公司 Small-clear-distance grade separation tunnel annular guide pit construction method
CN105134258A (en) * 2015-08-14 2015-12-09 中国建筑土木建设有限公司 Construction method by utilizing multiple steps and leg-locking of pipe shed for completely-weathered VI-grade surrounding rock of tunnel
CN105160111A (en) * 2015-09-11 2015-12-16 山西省交通科学研究院 Simulation method for loess tunnel numerical model by considering surrounding rock structural characteristics
CN105160111B (en) * 2015-09-11 2019-03-08 山西省交通科学研究院 A kind of emulation mode for the loess tunnel numerical model considering surrounding rock structure characteristic
CN105545323A (en) * 2015-12-07 2016-05-04 中交第二航务工程局有限公司 Construction method for open cut tunnel lining
CN105781573A (en) * 2016-03-18 2016-07-20 中铁九局集团第六工程有限公司 Railway down-traversing highway tunnel double-layer casing pipe reinforcement double-pipe shed follow-pipe drilling construction method
CN105781573B (en) * 2016-03-18 2019-03-01 中铁九局集团第六工程有限公司 The two-tube canopy pipe-following drilling construction method of vcehicular tunnel bilayer sleeve reinforcement is worn under railway
CN106121661A (en) * 2016-08-08 2016-11-16 中铁二局集团有限公司 A kind of tunnel trunk is by loess separating surface water rich strata construction method
CN106761769B (en) * 2016-11-23 2019-01-29 长安大学 A kind of construction technology of big cross section large-deformation tunnel in soft rock
CN106761769A (en) * 2016-11-23 2017-05-31 长安大学 A kind of construction technology of big cross section large-deformation tunnel in soft rock
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
CN107152283A (en) * 2017-07-11 2017-09-12 中交隧道工程局有限公司 It is a kind of in shallow tunnel weak surrounding rock use cross hang step excavation method
CN107401411A (en) * 2017-07-11 2017-11-28 中交隧道工程局有限公司 Step excavation construction method is strengthened in a kind of interim perpendicular support for being applied to IV grade of country rock Shallow depth bored tunnel

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