CN110439572A - A kind of ductule zero brushes slope and appears construction technology - Google Patents

A kind of ductule zero brushes slope and appears construction technology Download PDF

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Publication number
CN110439572A
CN110439572A CN201910779616.6A CN201910779616A CN110439572A CN 110439572 A CN110439572 A CN 110439572A CN 201910779616 A CN201910779616 A CN 201910779616A CN 110439572 A CN110439572 A CN 110439572A
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CN
China
Prior art keywords
tunnel
ductule
slope
zero
excavation
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
CN201910779616.6A
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Chinese (zh)
Inventor
李友坤
董道海
黄海山
董子龙
任君
剡国强
石文林
薛潮
刑庭松
徐驰
何永坤
陈国峰
蒋宏兴
高童童
李晓生
欧阳军
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 Tunnel Group Co Ltd CRTG
Original Assignee
China Railway Tunnel Group Co Ltd CRTG
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 Tunnel Group Co Ltd CRTG filed Critical China Railway Tunnel Group Co Ltd CRTG
Priority to CN201910779616.6A priority Critical patent/CN110439572A/en
Publication of CN110439572A publication Critical patent/CN110439572A/en
Pending legal-status Critical Current

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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
    • E21D9/001Improving soil or rock, e.g. by freezing; Injections
    • 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
    • E21D9/14Layout of tunnels or galleries; Constructional features of tunnels or galleries, not otherwise provided for, e.g. portals, day-light attenuation at tunnel openings

Abstract

The embodiment of the invention discloses a kind of ductule zero brush slopes to appear construction technology, is related to technical field of tunnel construction.Heavy grade hipped end degree in tunnel to be onstructed is greater than 40 °, and light grade hipped end degree is less than 25 °, comprising the following steps: S1, tunnel excavation are unidirectionally tunneled from light grade end to heavy grade end;S2, advanced tubule spacing is adjusted at the default hole out for reaching heavy grade end, enhances advance support;S3, excavation of appearing;S4, the construction of open cut tunnel section;Advance support described in step S2 is 2~5m before reaching out hole, lays polycyclic advanced tubule, and the circumferential spacing of advanced tubule is 20cm, and two groups of advanced tubules of tunneling direction mutually overlap, and carries out slip casting to advanced tubule to reinforce country rock.Appeared using unidirectionally being tunneled from outlet to import, and because in hole pipe roof construction restrictive condition it is big, the embodiment of the present invention by solid matter ductule replace hole super-front large pipe shed, reduce hole brush slope destroyed caused by environment, it is ensured that construction safety.

Description

A kind of ductule zero brushes slope and appears construction technology
Technical field
The present embodiments relate to technical field of tunnel construction, and in particular to a kind of ductule zero brushes slope and appears work of constructing Skill.
Background technique
With rapid economic development, the various traffic base construction demands such as rail traffic, highway gradually increase, and are constructing It inevitably needs to pass through some obstructions using tunneling in journey.
The import gradient is larger when constructing tunnel, and dense vegetation, big machinery cannot be introduced into, and construct extremely difficult, Er Qieguan Outer limb is larger when canopy is constructed, and easily causing pipe canopy lower section soil layer in work progress, there are wild effects, and large area brush slope is to ring Border damages, and constructs dangerous.
Summary of the invention
Brush slope for this purpose, the embodiment of the present invention provides a kind of ductule zero and appear construction technology, with solve in the prior art by Large area brush slope welding, the unsafe problem of construction are caused into hole in brush slope greatly.
To achieve the goals above, the embodiment of the present invention provides the following technical solutions:
According to a first aspect of the embodiments of the present invention, the ductule zero brush slope is appeared construction technology, tunnel great Po to be onstructed It spends hipped end degree and is greater than 40 °, light grade hipped end degree is less than 25 °, it is characterised in that: the ductule zero brushes slope and appears construction technology The following steps are included:
S1, tunnel excavation are unidirectionally tunneled from light grade end to heavy grade end;
S2, advanced tubule spacing is adjusted at the default hole out for reaching heavy grade end, enhances advance support;
S3, excavation of appearing;
S4, the construction of open cut tunnel section;
The circumferential spacing of advanced tubule is 20cm in step S2, and arch performs a ring advanced tubule in every hole Pin, is dug Two groups of advanced tubules into direction mutually overlap, and carry out slip casting to advanced tubule to reinforce country rock.
Further, excavation of appearing described in step S3 is excavated using the interim inverted arch method of three steps.
Further, the interim inverted arch method of three steps the following steps are included:
S301, top bar is excavated, performs the preliminary bracing on top bar base tunnel periphery, base tunnel bottom performs top bar and temporarily faces upward Arch closes face;
S302, after lagging behind top bar a distance, step in excavation performs the initial stage branch on middle step base tunnel periphery Shield, performs the interim inverted arch of middle step;
S303, in lagging behind one section of step away from height after, excavation is got out of a predicament or an embarrassing situation, and the initial stage branch on base tunnel periphery of getting out of a predicament or an embarrassing situation is performed Shield, performs interim inverted arch of getting out of a predicament or an embarrassing situation.
Further, appear described in step S3 excavation base tunnel width be 1m, be highly 2m.
Further, the circumferential spacing of advanced tubule described in step S2 is 20cm.
Further, appear before excavation described in step S3, construction intercepts water day other than Tunnel slope line 5m out Ditch.
Further, in step S4 in the construction of open cut tunnel section, the open cut tunnel section supporting open cut tunnel arch of at least 5m after appearing.
The embodiment of the present invention has the advantages that
The embodiment of the present invention is used unidirectionally to tunnel from outlet to import and be appeared, and because of pipe roof construction restrictive condition in hole Greatly, the embodiment of the present invention replaces hole super-front large pipe shed by solid matter ductule, reduces hole brush slope and destroys caused by environment, Ensure construction safety.
Detailed description of the invention
It, below will be to embodiment party in order to illustrate more clearly of embodiments of the present invention or technical solution in the prior art Formula or attached drawing needed to be used in the description of the prior art are briefly described.It should be evident that the accompanying drawings in the following description is only It is merely exemplary, it for those of ordinary skill in the art, without creative efforts, can also basis The attached drawing amplification of offer obtains other implementation attached drawings.
Structure depicted in this specification, ratio, size etc., only to cooperate the revealed content of specification, for Those skilled in the art understands and reads, and is not intended to limit the invention enforceable qualifications, therefore does not have technical Essential meaning, the modification of any structure, the change of proportionate relationship or the adjustment of size are not influencing the function of the invention that can be generated Under effect and the purpose that can reach, should all still it fall in the range of disclosed technology contents can cover.
Fig. 1 is that the ductule zero that provides of the embodiment of the present invention 1 brushes slope and appears the structural schematic diagram of construction technology;
Fig. 2 is that the ductule zero that provides of the embodiment of the present invention 1 brushes slope and appears the flow diagram of construction technology;
Fig. 3 is the schematic diagram of the interim inverted arch method of three steps of the embodiment of the present invention 1;
In figure: 1- heavy grade end 2- light grade end 3- goes out arch 6- open cut tunnel in the hole 4- advanced tubule 5- of hole and encircles The interim inverted arch 11- of the step 12- that gets out of a predicament or an embarrassing situation gets out of a predicament or an embarrassing situation and faces in step 10- in the interim inverted arch 9- of frame 7- top bar 8- top bar When inverted arch 13- lock foot anchor tube.
Specific embodiment
Embodiments of the present invention are illustrated by particular specific embodiment below, those skilled in the art can be by this explanation Content disclosed by book is understood other advantages and efficacy of the present invention easily, it is clear that described embodiment is the present invention one Section Example, instead of all the embodiments.Based on the embodiments of the present invention, those of ordinary skill in the art are not doing Every other embodiment obtained under the premise of creative work out, shall fall within the protection scope of the present invention.Institute in this specification Such as "upper" of reference, "lower", "left", "right", " centre " term, be merely convenient to the clear of narration, rather than to limit The enforceable range of the present invention, relativeness are altered or modified, under the content of no substantial changes in technology, when being also considered as this hair Bright enforceable scope.
Referring to Fig. 1~2, arrow is the practical tunneling direction in tunnel in Fig. 1, and heavy grade hipped end degree in tunnel to be onstructed is 45 °, is planted Dense, big machinery cannot be introduced into, and light grade hipped end degree is 15 °, and the ductule zero brush slope construction technology of appearing includes following Step:
S1, tunnel excavation are unidirectionally tunneled from light grade end 2 to heavy grade end 1;
S2, advanced tubule spacing is adjusted at the default hole 3 out for reaching heavy grade end, enhances advance support;
S3, excavation of appearing;
S4, the construction of open cut tunnel section;
Because whole buried depth is shallower, pipe roof construction once construct distance it is longer, behind increase advance support effect it is poor, extrapolation Angle is larger, and easily causing pipe canopy lower section soil layer in work progress, there are wild effects, so advance support is to arrive in step S2 The circumferential spacing of polycyclic advanced tubule 4 is adjusted to 20cm by 3m before up to hole 3 out, and it is advanced to perform a ring for arch 5 in every hole Pin Two groups of advanced tubules 4 of ductule 4, tunneling direction mutually overlap, and carry out slip casting to advanced tubule 4 to reinforce country rock.It is small Pilot tunnel uses hand excavation, observes the Change in surrounding rocks situation on hole top in digging process in time, reduces the disturbance pushed up to hole.
Appear before excavation described in step S3, construction intercepts water gutter other than 3 side slope line 5m of hole out, it is ensured that goes out The draining of hole position is unimpeded.Schedule ahead measurement group is determined position of appearing, and carries out unwrapping wire mark to openings position, arranges Openings position vegetation is purged by construction personnel;Essence is carried out to front of tunnel heading country rock using a variety of advance geologic prediction means Quasi- judgement;Monitoring measurement personnel survey more than twice, to data in time to phase monitoring data in the earth's surface and hole appeared in range It closes administrative staff to report, and is coped in time for counter-measure is formulated in advance;It is existing without infiltration in period Dong Ding position of appearing As rainfall can be effectively discharged by the gutter that intercepts water, and self is preferable in hole.
Referring to Fig. 3, excavation of appearing in step S3 is excavated using the interim inverted arch method of three steps.The interim inverted arch method of three steps is specific The following steps are included:
S301, excavate top bar 7, top bar 7 uses mechanical engagement hand excavation, every circulation excavation 0.6m, after excavation and When perform the preliminary bracing on top bar base tunnel periphery, base tunnel bottom performs the interim inverted arch 8 of top bar, and lock foot anchor tube 13 is utilized to increase By force, lock foot anchor tube 13 is effectively connect with arch 5 in hole, closes face;
S302, after lagging behind 7 a distance of top bar, step 9 in excavation perform the initial stage branch on middle step base tunnel periphery Shield, performs the interim inverted arch 10 of middle step;
S303, in lagging behind 9 one sections of step away from height after, excavation gets out of a predicament or an embarrassing situation 11, performs the initial stage on base tunnel periphery of getting out of a predicament or an embarrassing situation Supporting performs interim inverted arch 12 of getting out of a predicament or an embarrassing situation.
Middle step 9 gets out of a predicament or an embarrassing situation 11 using control Blasting Excavation, excavates drilling depth no more than arch 5 in two holes Pin, and or so Two sides are staggered two Pin or more, and it is 4 that each arch springing position lock foot anchor tube 13, which increases, effectively connect with reinforcing bar, and immediate support;Out Within the scope of the 5m of hole position, 5 spacing of arch in hole is adjusted to 0.5m/ Pin, strengthening supporting measure, guarantee section overburden layer of appearing is relatively thin The stabilization of position.
The appear base tunnel width of excavation of step S3 is 1m, is highly 2m, appears to reduce and excavate range, it is ensured that hole top of appearing The stability of soil layer position.The circumferential spacing of advanced tubule 4 is 20cm in step S2.Arch 5 applies a ring in the hole every two Pin Advanced tubule 4 is that 4.5m ductule mutually overlaps realization ductule solid matter arrangement by joint length;It is heavy to prevent It drops, the settling amount of 25cm is reserved within the scope of Portal Section 20m, avoid the occurrence of and owe the influence later period supporting quality such as digging.
In step S4 in the construction of open cut tunnel section, the open cut tunnel section supporting open cut tunnel arch 6 of at least 5m after appearing.Tunnel outlet follows The principle of " early going out into evening ", reserves enough lining cutting spaces by open cut tunnel arch 6, adds preliminary bracing, realizes tunnel outlet " evening Out ".Easily soften because section country rock of appearing meets water, so that bearing capacity is lost, to prevent construction period rainfall from causing to tunnel excavation It influences, guarantees its own bearing capacity, covered in the position Dong Ding using colour bar cloth;Construction period supervises reinforcement in earth's surface and hole Control measures, and reports without delay detection data, and project leadership takes timely measure for data variation.
The embodiment of the present invention is used unidirectionally to tunnel from outlet to import and be appeared, and because of pipe roof construction restrictive condition in hole Greatly, the embodiment of the present invention replaces hole super-front large pipe shed by solid matter ductule, reduces hole brush slope and destroys caused by environment, Realize that zero brush slope is appeared, it is ensured that construction safety.
Although above having used general explanation and specific embodiment, the present invention is described in detail, at this On the basis of invention, it can be made some modifications or improvements, this will be apparent to those skilled in the art.Therefore, These modifications or improvements without departing from theon the basis of the spirit of the present invention are fallen within the scope of the claimed invention.

Claims (7)

  1. The construction technology 1. a kind of brush of ductule zero slope is appeared, heavy grade hipped end degree in tunnel to be onstructed are greater than 40 °, light grade hipped end degree Less than 25 °, it is characterised in that: the ductule zero brush slope appear construction technology the following steps are included:
    S1, tunnel excavation are unidirectionally tunneled from light grade end to heavy grade end;
    S2, advanced tubule spacing is adjusted at the default hole out for reaching heavy grade end, enhances advance support;
    S3, excavation of appearing;
    S4, the construction of open cut tunnel section;
    The circumferential spacing of advanced tubule described in step S2 is 20cm, and two groups of advanced tubules of tunneling direction mutually overlap, Slip casting is carried out to reinforce country rock to advanced tubule.
  2. The construction technology 2. brush of ductule zero according to claim 1 slope is appeared, it is characterised in that: appear described in step S3 It excavates and is excavated using the interim inverted arch method of three steps.
  3. The construction technology 3. brush of ductule zero according to claim 2 slope is appeared, it is characterised in that: three steps are interim Inverted arch method the following steps are included:
    S301, top bar to be excavated, performs the preliminary bracing on top bar base tunnel periphery, base tunnel bottom performs the interim inverted arch of top bar, Close face;
    S302, after lagging behind top bar a distance, step in excavation performs the preliminary bracing on middle step base tunnel periphery, applies Do the interim inverted arch of middle step;
    S303, in lagging behind one section of step away from height after, excavation is got out of a predicament or an embarrassing situation, and is performed the preliminary bracing on base tunnel periphery of getting out of a predicament or an embarrassing situation, is applied It gets out of a predicament or an embarrassing situation interim inverted arch.
  4. The construction technology 4. brush of ductule zero according to claim 1 slope is appeared, it is characterised in that: appear described in step S3 The base tunnel width of excavation is 1m, is highly 2m.
  5. The construction technology 5. brush of ductule zero according to claim 1 slope is appeared, it is characterised in that: advanced described in step S2 The circumferential spacing of ductule is 20cm.
  6. The construction technology 6. brush of ductule zero according to claim 1 slope is appeared, it is characterised in that: carrying out described in step S3 Excavation of appearing before, construction intercepts water gutter other than Tunnel slope line 5m out.
  7. The construction technology 7. brush of ductule zero according to claim 1 slope is appeared, it is characterised in that: open cut tunnel section is applied in step S4 In work, the open cut tunnel section supporting open cut tunnel arch of at least 5m after appearing.
CN201910779616.6A 2019-08-22 2019-08-22 A kind of ductule zero brushes slope and appears construction technology Pending CN110439572A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201910779616.6A CN110439572A (en) 2019-08-22 2019-08-22 A kind of ductule zero brushes slope and appears construction technology

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Application Number Priority Date Filing Date Title
CN201910779616.6A CN110439572A (en) 2019-08-22 2019-08-22 A kind of ductule zero brushes slope and appears construction technology

Publications (1)

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002078174A (en) * 2000-08-31 2002-03-15 Kanegafuchi Chem Ind Co Ltd Small duct sleeve
CN103628885A (en) * 2013-11-05 2014-03-12 中交一公局第三工程有限公司 Tunnel exit cover-excavation construction method of Ultra-shadow buried tunnel
CN204283438U (en) * 2014-11-28 2015-04-22 中铁第四勘察设计院集团有限公司 Portal supporting and protection structure
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
CN108457656A (en) * 2018-03-05 2018-08-28 北京市政建设集团有限责任公司 A kind of unearthed method for tunnel construction
CN208040395U (en) * 2018-03-02 2018-11-02 中铁第一勘察设计院集团有限公司 A kind of combined type is banketed Tunnel Portal Structures

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002078174A (en) * 2000-08-31 2002-03-15 Kanegafuchi Chem Ind Co Ltd Small duct sleeve
CN103628885A (en) * 2013-11-05 2014-03-12 中交一公局第三工程有限公司 Tunnel exit cover-excavation construction method of Ultra-shadow buried tunnel
CN204283438U (en) * 2014-11-28 2015-04-22 中铁第四勘察设计院集团有限公司 Portal supporting and protection structure
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
CN208040395U (en) * 2018-03-02 2018-11-02 中铁第一勘察设计院集团有限公司 A kind of combined type is banketed Tunnel Portal Structures
CN108457656A (en) * 2018-03-05 2018-08-28 北京市政建设集团有限责任公司 A kind of unearthed method for tunnel construction

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
高文韬: "双层超前小导管在中短隧道单向出洞施工中的应用", 《城市道桥与防洪》 *

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