CN108204236A - Pre -arranged layer tunnel piecemeal synchronous construction full face tunneling method - Google Patents

Pre -arranged layer tunnel piecemeal synchronous construction full face tunneling method Download PDF

Info

Publication number
CN108204236A
CN108204236A CN201711497976.4A CN201711497976A CN108204236A CN 108204236 A CN108204236 A CN 108204236A CN 201711497976 A CN201711497976 A CN 201711497976A CN 108204236 A CN108204236 A CN 108204236A
Authority
CN
China
Prior art keywords
peripheral
drilling depth
tunneling
construction
cycle
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201711497976.4A
Other languages
Chinese (zh)
Inventor
陈德斌
傅强
夏真荣
冯春田
税明东
刘臻武
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
China Railway No 5 Engineering Group Co Ltd
Original Assignee
China Railway No 5 Engineering Group Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by China Railway No 5 Engineering Group Co Ltd filed Critical China Railway No 5 Engineering Group Co Ltd
Priority to CN201711497976.4A priority Critical patent/CN108204236A/en
Publication of CN108204236A publication Critical patent/CN108204236A/en
Pending legal-status Critical Current

Links

Classifications

    • EFIXED CONSTRUCTIONS
    • E21EARTH DRILLING; MINING
    • E21DSHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D9/00Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries
    • EFIXED CONSTRUCTIONS
    • E21EARTH DRILLING; MINING
    • E21DSHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D9/00Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries
    • E21D9/006Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries by making use of blasting methods

Abstract

The invention discloses a kind of pre -arranged layer tunnel piecemeal synchronous construction full face tunneling methods.Tunnel excavation section is divided into middle section(1)With peripheral portion(2)Two parts synchronous construction.First use the big drilling depth drill-blast tunnelling middle section of drill jumbo tunneling boring(1), 4.0~4.5m of drilling depth, and to middle section arch wall(1‑1)It applies gunite concrete and carries out gib as first step cycle;Then the small drilling depth drill-blast tunnelling peripheral portion of drill jumbo is used(2), 2.5~3.0m of drilling depth, and to peripheral portion arch wall(2‑1)Preliminary bracing is applied to recycle as second step.Then proceed to construction middle section(1)Second first step cycle;Then continuous construction peripheral portion(2)Two second step cycles.The present invention, which successfully solves drill jumbo and excavates drilling depth, to be caused to backbreak greatly value also larger technical barrier.The present invention is suitable for I, II grade of country rock of major long tunnel and is constructed using drill jumbo full section method drill-blast tunnelling.

Description

Pre -arranged layer tunnel piecemeal synchronous construction full face tunneling method
Technical field
The present invention relates to a kind of pre -arranged layer tunnel piecemeal synchronous construction full face tunneling methods.
Background technology
When I, II grade of country rock section full section method of major long tunnel excavates, to accelerate construction progress, working efficiency is improved, is usually adopted It is constructed with three arms or four-arm rock drilling jumbo.Drill jumbo penetration rate is fast, efficient, and cyclic advance is big, general reachable 4.0~ 4.5m, therefore, construction speed are fast.But big because excavating cyclic advance, tunnel value of backbreaking is also larger.Since excessive is backbreak so that Gunite concrete quantity is significantly increased with lining concrete quantity, is added significantly to constructing tunnel cost.Therefore, one kind need to be found Method will can have faster excavation progress, and tunnel excavation can be backbreak to value control within limits.
Invention content
The technical problem to be solved by the present invention is to:A kind of pre -arranged layer tunnel piecemeal synchronous construction full face tunneling is provided Method, you can to ensure having faster excavation progress, and tunnel blasting excavation can be backbreak to value control within limits, carried High constructing tunnel comprehensive benefit.
The technical scheme is that:A kind of pre -arranged layer tunnel piecemeal synchronous construction full face tunneling method, by tunnel Road excavated section is divided into middle section and peripheral portion two parts synchronous construction, one layer of quick-fried layer of light is reserved, during peripheral portion is closely followed Between partly construct.The first big drilling depth of tunneling boring excavates middle section and applies gib and recycled as the first step, then small drilling depth It excavates peripheral portion and applies preliminary bracing and recycled as second step;Second first step cycle of construction is then proceeded to, is then connected Continuous two second step cycles of construction.It repeats the above steps and constructs.
The thickness of pre -arranged layer, that is, peripheral portion is designed according to rock property and explosion and is determined, middle hard rock for 50~ 70cm。
First step cycle excavates heavy workload, is excavated using the big drilling depth of drill jumbo, to meet excavation schedule requirement, excavates 4.0~4.5m of drilling depth;Second step cycle excavation workload is small, is excavated using the small drilling depth of drill jumbo, excessive with control over-excavation value, Excavate 2.5~3.0m of drilling depth.
In first step cycle, after middle section is excavated, gunite concrete gib is carried out to middle section arch wall, with Ensure construction safety.
In second step cycle, periphery hole spacing is designed according to rock property and explosion and is determined, middle hard rock takes 40~55cm.
In second step cycle, after peripheral portion excavates, first handled with milling digging machine and owe to dig, then to peripheral portion arch wall by setting Meter requirement applies the preliminary bracings such as 22 anchor poles of Φ and gunite concrete.
Second step cycle once or twice is carried out after often carrying out a first step cycle, makes peripheral portion excavation face and centre The distance between part face is less than 2.5m, to ensure construction safety and convenient for constructing.
Beneficial effects of the present invention:
Tunnel excavation face is divided into middle section and peripheral portion two parts synchronous construction, middle section is excavated heavy workload, adopted It is excavated with big drilling depth, can meet and excavate schedule requirement;Peripheral portion excavation workload is small, is excavated using small drilling depth, can be preferably The problem of control over-excavation value is excessive.Peripheral portion is excavated immediately following middle section, is conducive to two parts and is constructed using drill jumbo, Process conversion and construction input can be reduced.The present invention can not only meet the schedule requirement of Rapid Construction of Tunnels, but also tunnel can be avoided to open Digging value of backbreaking is excessive, successfully solves drill jumbo and excavates drilling depth and cause to backbreak greatly value also larger technical barrier, suitable for length Big I, II grade of tunnel country rock is constructed using drill jumbo full section method drill-blast tunnelling.
Description of the drawings
Fig. 1 is the tunnel piecemeal synchronous construction full face tunneling cross-sectional view of the present invention.
Fig. 2 is A-A sectional views of Fig. 1, i.e. tunnel piecemeal synchronous construction full face tunneling skiagraph.
Specific embodiment
The embodiment of the present invention:II grade of country rock section of Double-track Tunnel is excavated using three arm rock drilling jumbo full section drill bursts, Excavated section is divided into middle section 1 and 2 two parts synchronous construction of peripheral portion, when drill-blast tunnelling reserves one layer of quick-fried layer of light, i.e., Peripheral portion 2, thickness 60cm, peripheral portion 2 are constructed immediately following middle section 1.
First first step cycle is carried out with the big drilling depth drill-blast tunnelling middle section 1 of three arm rock drilling jumbo tunneling borings, drilling depth 4.5m, After muck removal, gib is carried out to middle section arch wall 1-1, applies 3cm thickness gunite concretes.It then continues to three arm drilling stagings The small drilling depth drill-blast tunnelling peripheral portion 2 of vehicle carries out second step cycle, periphery hole spacing 50cm, drilling depth 3.0m.Peripheral portion 2 After excavation, first owe to dig with a milling digging machine processing, then arch locally applies 22 anchor poles 3 of Φ, 1.5 × 1.5m of spacing, single length 2.5m;Peripheral portion arch wall 2-1 applies 5cm thickness gunite concretes.After applying preliminary bracing by design requirement, it is big to continue tunneling boring Drilling depth drill-blast tunnelling, second first step cycle of gib middle section 1, drilling depth 4.5m;Then continuous small drilling depth excavate, 2 two second step cycles of supporting peripheral portion, per cyclic advance 3.0m.It repeats the above steps and constructs.
Peripheral portion 2 is constructed immediately following middle section 1 in construction, stringent to control peripheral portion excavation face 2-2 and middle section The distance between face 1-2 is within 2.5m, to ensure construction safety and convenient for constructing.

Claims (5)

  1. A kind of 1. pre -arranged layer tunnel piecemeal synchronous construction full face tunneling method, it is characterised in that:By tunnel excavation section It is divided into middle section(1)With peripheral portion(2)Two parts synchronous construction, the first big drilling depth of tunneling boring excavate middle section(1)And it applies Make gib to recycle as the first step, then small drilling depth excavates peripheral portion(2)And it applies preliminary bracing and is followed as second step Ring;Second first step cycle of construction is then proceeded to, then continuous two second step cycles of construction.
  2. 2. piecemeal synchronous construction full face tunneling method in pre -arranged layer tunnel according to claim 1, it is characterised in that: Peripheral portion(2)Immediately following middle section(1)Construction, peripheral portion excavation face(2-2)With middle section face(1-2)Between Distance is less than 2.5m.
  3. 3. piecemeal synchronous construction full face tunneling method in pre -arranged layer tunnel according to claim 1, it is characterised in that: Pre -arranged layer peripheral portion(2)Thickness designed and determine according to rock property and explosion, middle hard rock is 50~70cm.
  4. 4. piecemeal synchronous construction full face tunneling method in pre -arranged layer tunnel according to claim 1, it is characterised in that: First step cycle excavates 4.0~4.5m of drilling depth, and second step cycle excavates 2.5~3.0m of drilling depth, often carries out a first step cycle Followed by carry out second step cycle once or twice.
  5. 5. piecemeal synchronous construction full face tunneling method in pre -arranged layer tunnel according to claim 4, it is characterised in that: In second step cycle, periphery hole spacing is designed according to rock property and explosion and is determined, middle hard rock takes 40~55cm.
CN201711497976.4A 2017-12-29 2017-12-29 Pre -arranged layer tunnel piecemeal synchronous construction full face tunneling method Pending CN108204236A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201711497976.4A CN108204236A (en) 2017-12-29 2017-12-29 Pre -arranged layer tunnel piecemeal synchronous construction full face tunneling method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201711497976.4A CN108204236A (en) 2017-12-29 2017-12-29 Pre -arranged layer tunnel piecemeal synchronous construction full face tunneling method

Publications (1)

Publication Number Publication Date
CN108204236A true CN108204236A (en) 2018-06-26

Family

ID=62606192

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201711497976.4A Pending CN108204236A (en) 2017-12-29 2017-12-29 Pre -arranged layer tunnel piecemeal synchronous construction full face tunneling method

Country Status (1)

Country Link
CN (1) CN108204236A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111502762A (en) * 2020-04-24 2020-08-07 中铁五局集团有限公司 Blasting damage detection method based on small-spacing cavern group

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103244133A (en) * 2013-05-17 2013-08-14 贵州省公路工程集团有限公司 Coal measure strata tunnel milling digging and blasting combined construction method
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
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
CN107218043A (en) * 2017-08-27 2017-09-29 中铁二十局集团第六工程有限公司 A kind of breaking surrounding rock cavern excavation method

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103244133A (en) * 2013-05-17 2013-08-14 贵州省公路工程集团有限公司 Coal measure strata tunnel milling digging and blasting combined construction method
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
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
CN107218043A (en) * 2017-08-27 2017-09-29 中铁二十局集团第六工程有限公司 A kind of breaking surrounding rock cavern excavation method

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
芮江: "《预留光面层光面爆破在大湾隧道施工中的应用》", 《四川水泥》 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111502762A (en) * 2020-04-24 2020-08-07 中铁五局集团有限公司 Blasting damage detection method based on small-spacing cavern group

Similar Documents

Publication Publication Date Title
CN102926757B (en) The construction method of the mountain ridge weak Large span tunnel two step four step excavation supporting
CN101806217B (en) Tunneling method for three-line parallel small-distance shallow-buried and unsymmetrical-pressure tunnel groups
CN103775092B (en) Tunnels in Shallow Buried tunneling remaining core soil in advance improvement CRD construction
CN101408106B (en) Small tube shed pre-grouting method
CN103835729B (en) Deep distance roadway surrounding rock pre grouting from the surface reinforcement process
CN103615250B (en) The full Open stope mining afterwards filling of itemize studding works in coordination with mining codes
CN102644466B (en) Joist arching method for constructing ultra-shallow buried large-span underground excavated subway station in rocky stratum
CN102953732A (en) Room-and-pillar major-diameter longhole inverted-step-like segmented lateral caving subsequent filling mining method
CN101144384B (en) Tunnel engineering non-blasting weak disturbance excavating method
CN104806251B (en) Subsidiary inverted excavation construction method for urban subway station under complex environment
CN108678769A (en) Deep Gateway anchor note cuts top master control and stays lane method
CN103899318B (en) The milling of medium ground tunnel is dug and supporting machinery construction
CN102678126A (en) Method for excavating mountain tunnels in weak surrounding rock-fractured zones or shallow covered slope sections
CN103306713A (en) Networking reinforcement method for cross drilling holes of outburst coal seam
CN102383813A (en) Construction method for ultralong loess accumulative roc tunnel
CN105351001B (en) A kind of method based on gob side entry retaining region reinforcement gas pumping
CN103321235A (en) Composite soil nailing wall slope support method
CN107143338B (en) A kind of coal mine roadway driving and method for protecting support
CN107023300A (en) A kind of use canopy, which is defended the doctrine, builds the construction method of subway station
CN108518222A (en) Paste body filling combination top plate presplitting second mining super high seam stops the method for adopting line coal column
CN108204236A (en) Pre -arranged layer tunnel piecemeal synchronous construction full face tunneling method
CN103775095A (en) Ridge soft-foundation tunnel advance double guide tunnel and construction method thereof
CN103016027A (en) Tunnel or roadway excavating method under weak and broken complicated geological conditions
CN108843339B (en) The auxiliary slip casting platform and construction method of large-scale solution cavity are passed through when existing tunnel digs
CN105862725A (en) Underground construction preliminary grouting waterproof and anti-seepage supporting technology

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
RJ01 Rejection of invention patent application after publication

Application publication date: 20180626

RJ01 Rejection of invention patent application after publication