CN107605490A - Single hole large cross-section tunnel double side wall construction conversion process - Google Patents
Single hole large cross-section tunnel double side wall construction conversion process Download PDFInfo
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- CN107605490A CN107605490A CN201710748122.2A CN201710748122A CN107605490A CN 107605490 A CN107605490 A CN 107605490A CN 201710748122 A CN201710748122 A CN 201710748122A CN 107605490 A CN107605490 A CN 107605490A
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- side wall
- double side
- tunnel
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- supporting
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Abstract
The invention discloses a kind of single hole large cross-section tunnel double side wall construction conversion process, comprise the following steps：The first step：Mid-board is moved to the left, interim inverted arch moves overlapped with CRD mid-board, interim inverted arch gradually downward on the left of double side wall tunnel；Second step：Base tunnel top bar at left and right sides of double side wall, get out of a predicament or an embarrassing situation and middle part top bar excavation supporting, reserved middle part is got out of a predicament or an embarrassing situation Core Soil；3rd step：Light section benching tunnelling method top bar, excavation supporting of getting out of a predicament or an embarrassing situation；4th step：Top bar at left and right sides of middle section CRD, right side are got out of a predicament or an embarrassing situation excavation supporting；5th step：Get out of a predicament or an embarrassing situation in the middle part of double side wall excavation supporting, excavation supporting of being got out of a predicament or an embarrassing situation on the right side of CRD.The present invention is combined and constructed using the movement of two side-wall pilot tunnel mid-board and remaining core soil in advance, is ensured that construction safety is convenient, is reduced cost, accelerating construction progress, arrangement and method for construction adjustment flexibility is big, and surrouding rock deformation hardly develops, and disclosure satisfy that the project construction strict to deformation requirements.
Description
Technical field
The present invention relates to vcehicular tunnel, city underground engineering technical field, more particularly to a kind of single hole large cross-section tunnel are double
Side wall construction conversion process.
Background technology
With the continuous development of urban rail transit in China, the construction of subway enters a peak period.In new and old tunnel
Linkage section and other specific conditions under, the situation that large cross-section tunnel is changed to double-hole tunnel can be run into.Due to tunnel cross-section
Difference, there is some difference for lining style, supporting parameter and digging construction method, determines and engineering method conversion is faced during constructing tunnel
Situation.Because section size differs greatly with design of its support, in the case where not removing temporary support, construction inconvenience, such as go out
Slag can only be carried out manually with charging.One kind is needed on the premise of temporary support is not removed, and ensures construction safety and continuous new
Technique, engineering method.
The content of the invention
, can be with the invention provides a kind of single hole large cross-section tunnel double side wall construction conversion process to overcome above mentioned problem
In the case where not removing temporary support, complete single hole large cross-section tunnel and changed to double hole CRD and benching tunnelling method.
The technical solution adopted by the present invention is：
Single hole large cross-section tunnel double side wall construction conversion process, comprises the following steps：
The first step：Mid-board is moved to the left on the left of large cross-section tunnel double side wall overlaps with CRD mid-boards, is left office on double side wall
The interim inverted arch of rank is moved down to be moved to the interim inverted arch of CRD up/down steps and overlapped；
Second step：Base tunnel top bar, excavation supporting of getting out of a predicament or an embarrassing situation on the right side of double side wall, double side wall left side base tunnel top bar, leave office
Rank excavation supporting, double side wall middle part top bar excavation supporting, reserves Core Soil of being got out of a predicament or an embarrassing situation in the middle part of double side wall；
3rd step：Light section benching tunnelling method top bar, excavation supporting of getting out of a predicament or an embarrassing situation；
4th step：Top bar, excavation supporting of getting out of a predicament or an embarrassing situation on the left of middle section CRD, CRD right sides top bar excavation supporting；
5th step：Get out of a predicament or an embarrassing situation in the middle part of double side wall Core Soil excavation supporting, excavation supporting of being got out of a predicament or an embarrassing situation on the right side of CRD.
A segment distance starts to construct in face of double side wall tunnel excavation to tunnel conversion in the first step, while During Initial Stage Construction
Supporting and temporary supporting system installation.
The preliminary bracing includes the gibs such as main body preliminary bracing, mid-board supporting and interim inverted arch supporting, every
After individual pilot drive, the preliminary bracing needs to close.
Double side wall tunnel temporary supporting system construction stops when being moved to CRD tunnel partition walls and the coincidence of interim inverted arch
Only.
Fine-tuning benching tunnelling method tunnel shoulder height in the first step, makes double side wall up/down steps inverted arch and benching tunnelling method step
It is completely superposed.
In 5th step, large cross-section tunnel gib and interim inverted arch are removed after construction, carries out two lining constructions.
The beneficial effects of the invention are as follows：
The present invention is combined and constructed using the movement of two side-wall pilot tunnel mid-board and remaining core soil in advance, convenient construction,
Reserved double side wall Core Soil of getting out of a predicament or an embarrassing situation excavates after tunnel conversion, ensure that the safety of tunnel excavation, reduces cost, accelerate to apply
Work progress, arrangement and method for construction adjustment flexibility is big, and surrouding rock deformation hardly develops, and disclosure satisfy that the project strict to deformation requirements
Construction.
Brief description of the drawings
Below in conjunction with the drawings and specific embodiments, the present invention is further detailed explanation.
Fig. 1 is the single hole big cross section double side wall tunnel structure schematic diagram of the present invention.
Drawing reference numeral explanation：1st, mid-board on the right side of double side wall；2nd, interim inverted arch on the right side of double side wall；3rd, interval on the left of double side wall
Wall；4th, interim inverted arch in the middle part of double side wall；5th, interim inverted arch on the left of double side wall；6th, Core Soil.
Embodiment
As shown in figure 1, one of embodiment provided by the invention, single hole large cross-section tunnel double side wall construction conversion process, bag
Include following steps：
The first step：Mid-board 3 is moved to the left on the left of large cross-section tunnel double side wall overlaps with CRD mid-boards, above and below double side wall
The interim inverted arch of step is moved to coincidence to the interim inverted arch of CRD up/down steps；
Second step：Double side wall right side base tunnel top bar excavation supporting simultaneously applies interim inverted arch 2 on the right side of double side wall, the double side wall right side
Side is got out of a predicament or an embarrassing situation excavation supporting, and base tunnel top bar excavation supporting simultaneously applies interim inverted arch 5, double side wall on the left of double side wall on the left of double side wall
Left side is got out of a predicament or an embarrassing situation excavation supporting, and top bar excavation supporting simultaneously applies interim inverted arch 4 in the middle part of double side wall in the middle part of double side wall, in double side wall
Subordinate's step remaining core soil in advance 6；
3rd step：Light section benching tunnelling method top bar excavation supporting, excavation supporting of getting out of a predicament or an embarrassing situation；
4th step：Middle section CRD left side top bar excavation supportings simultaneously apply interim inverted arch, excavation branch of being got out of a predicament or an embarrassing situation on the left of CRD
Shield, CRD right side top bar excavation supportings simultaneously apply interim inverted arch；
5th step：Get out of a predicament or an embarrassing situation in the middle part of double side wall Core Soil excavation supporting, excavation supporting of being got out of a predicament or an embarrassing situation on the right side of CRD.
25m starts in face of double side wall tunnel excavation to tunnel conversion, mid-board 3 on the left of large cross-section tunnel double side wall by
Step is moved to the left, until being overlapped with CRD or so mid-board, interim inverted arch 5 moves gradually downward on the left of double side wall, until and CRD
The interim inverted arch of step overlaps in up and down.If inverted arch is not completely superposed with benching tunnelling method step during double side wall up/down steps, need to finely tune
Benching tunnelling method tunnel shoulder height makes its coincidence.
When construction large cross-section tunnel double side wall mid-board and interim inverted arch, while During Initial Stage Construction supporting and temporary supporting system
Installation, temporary supporting system construction stop when being moved to CRD tunnel partition walls and the coincidence of interim inverted arch, and the preliminary bracing includes
Gib, the preliminary bracings such as main body preliminary bracing, mid-board supporting and interim inverted arch supporting need to be in each pilot drives
After close.
After completing preliminary bracing, continue progressively to construct double side wall right side top bar excavation supporting and apply double side wall right side to face
When inverted arch 2, excavation supporting of getting out of a predicament or an embarrassing situation on the right side of double side wall, top bar excavation supporting on the left of double side wall, get out of a predicament or an embarrassing situation out on the left of double side wall
Supporting is dug, double side wall middle part top bar excavation supporting simultaneously applies interim inverted arch 4 in the middle part of double side wall, got out of a predicament or an embarrassing situation in the middle part of double side wall reserved
Core Soil 6.
Then light section benching tunnelling method constructing tunnel top bar, excavation supporting of getting out of a predicament or an embarrassing situation are carried out, CRD tunnel excavation supports are simultaneously applied
Make interim inverted arch, top bar excavation supporting on the right side of got out of a predicament or an embarrassing situation on the left of CRD excavation supporting, and CRD.
Soil of being got out of a predicament or an embarrassing situation in the middle part of big cross section double side wall tunnel is finally excavated, excavation supporting of being got out of a predicament or an embarrassing situation on the right side of construction CRD tunnels is complete
Into after construction, large cross-section tunnel gib and interim inverted arch are removed, carries out two lining constructions.
It is described above, simply presently preferred embodiments of the present invention, the invention is not limited in above-mentioned embodiment, as long as
It reaches the technique effect of the present invention with identical means, should all belong to protection scope of the present invention.
Claims (6)
- The conversion process 1. single hole large cross-section tunnel double side wall is constructed, it is characterised in that comprise the following steps：The first step：Mid-board is moved to the left on the left of large cross-section tunnel double side wall overlaps with CRD mid-boards, and double side wall up/down steps face When inverted arch move down to be moved to the interim inverted arch of CRD up/down steps and overlap；Second step：Base tunnel top bar, excavation supporting of getting out of a predicament or an embarrassing situation on the right side of double side wall, double side wall left side base tunnel top bar, get out of a predicament or an embarrassing situation out Supporting is dug, double side wall middle part top bar excavation supporting, reserves Core Soil of being got out of a predicament or an embarrassing situation in the middle part of double side wall；3rd step：Light section benching tunnelling method top bar, excavation supporting of getting out of a predicament or an embarrassing situation；4th step：Top bar, excavation supporting of getting out of a predicament or an embarrassing situation on the left of middle section CRD, CRD right sides top bar excavation supporting；5th step：Get out of a predicament or an embarrassing situation in the middle part of double side wall Core Soil excavation supporting, excavation supporting of being got out of a predicament or an embarrassing situation on the right side of CRD.
- 2. single hole large cross-section tunnel double side wall construction conversion process according to claim 1, it is characterised in that：In the first step A segment distance starts to construct in face of double side wall tunnel excavation to tunnel conversion, while During Initial Stage Construction supporting and temporary supporting system peace Dress.
- 3. single hole large cross-section tunnel double side wall construction conversion process according to claim 2, it is characterised in that：The initial stage Supporting includes the gibs such as main body preliminary bracing, mid-board supporting and interim inverted arch supporting, described after each pilot drive Preliminary bracing needs to close.
- 4. single hole large cross-section tunnel double side wall construction conversion process according to claim 2, it is characterised in that：The bilateral The temporary supporting system construction of wall tunnel stops when being moved to CRD tunnel partition walls and the coincidence of interim inverted arch.
- 5. single hole large cross-section tunnel double side wall construction conversion process according to claim 1, it is characterised in that：In the first step Fine-tuning benching tunnelling method tunnel shoulder height, makes double side wall up/down steps inverted arch be completely superposed with benching tunnelling method step.
- 6. single hole large cross-section tunnel double side wall construction conversion process according to claim 1, it is characterised in that：5th step In, large cross-section tunnel gib and interim inverted arch are removed after construction, carries out two lining constructions.
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| 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 |
| 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 |
| 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 |
| CN110331980A (en) * | 2019-06-17 | 2019-10-15 | 中国铁建大桥工程局集团有限公司 | A kind of shallow embedding fine sand layer tunnel Varied section transition and conversion construction method |
| CN110821502A (en) * | 2019-11-29 | 2020-02-21 | 中铁隧道局集团有限公司 | Novel construction method for entrance section of weak surrounding rock large-span mountain tunnel |
| CN112523760A (en) * | 2020-12-18 | 2021-03-19 | 山东高速科技发展集团有限公司科技研发中心 | Construction method for converting double-side-wall pilot tunnel into CD method in large-section tunnel |
| CN113389566A (en) * | 2021-07-30 | 2021-09-14 | 中铁十二局集团有限公司 | Construction method for rapid expanding excavation and conversion by CRD (China railway track) normal double-side-wall pit guiding method |
| CN113417645A (en) * | 2021-06-01 | 2021-09-21 | 上海宝冶集团有限公司 | Large-section tunnel excavation method based on double-side-wall pit guiding method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| 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 |
| 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 |
| 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 |
| CN110331980A (en) * | 2019-06-17 | 2019-10-15 | 中国铁建大桥工程局集团有限公司 | A kind of shallow embedding fine sand layer tunnel Varied section transition and conversion construction method |
| CN110821502A (en) * | 2019-11-29 | 2020-02-21 | 中铁隧道局集团有限公司 | Novel construction method for entrance section of weak surrounding rock large-span mountain tunnel |
| CN112523760A (en) * | 2020-12-18 | 2021-03-19 | 山东高速科技发展集团有限公司科技研发中心 | Construction method for converting double-side-wall pilot tunnel into CD method in large-section tunnel |
| CN112523760B (en) * | 2020-12-18 | 2022-05-13 | 山东高速工程咨询集团有限公司科技研发中心 | Construction method for converting double-side-wall pilot tunnel into CD method in large-section tunnel |
| CN113417645A (en) * | 2021-06-01 | 2021-09-21 | 上海宝冶集团有限公司 | Large-section tunnel excavation method based on double-side-wall pit guiding method |
| CN113389566A (en) * | 2021-07-30 | 2021-09-14 | 中铁十二局集团有限公司 | Construction method for rapid expanding excavation and conversion by CRD (China railway track) normal double-side-wall pit guiding method |
| CN113389566B (en) * | 2021-07-30 | 2022-04-08 | 中铁十二局集团有限公司 | Construction method for rapid expanding excavation and conversion by CRD (China railway track) normal double-side-wall pit guiding method |
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