CN103899323B - A kind of construction method of shield crossing rail yard - Google Patents
A kind of construction method of shield crossing rail yard Download PDFInfo
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- CN103899323B CN103899323B CN201410137593.6A CN201410137593A CN103899323B CN 103899323 B CN103899323 B CN 103899323B CN 201410137593 A CN201410137593 A CN 201410137593A CN 103899323 B CN103899323 B CN 103899323B
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- injected hole
- shield
- slurries
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Abstract
The invention discloses a kind of construction method of shield crossing rail yard, its formed by the multiple sleeve valve barrel grouting tilted to below circuit in platform both sides to be one-sidedly connected, bilateral connects formation entirety altogether, make the soil body bottom rail track obtain integral reinforcing, improve the self-stability of the soil body.By the control of boring parameter, soil pressure be unearthed the conservative control measure and tunnel time powerful lamellar body Dwell sync slip casting, ensure that stablizing of excavation face, reduction soil disturbance, make lamellar body provide strong support force to the soil body simultaneously, avoid the soil body generation sedimentation in driving or cave in.Reinforced by the injecting grout through steel perforated pipe tunneling rear arch, avoid the posterior settlement of the soil body.Described construction method, the omnibearing control achieved to solum settlement in the construction of field, shield crossing station, reduces the security risk of construction, achieves the construction of the shield crossing rail yard of severe geological conditions.
Description
Technical field
The present invention relates to method for tunnel construction, particularly a kind of construction method of shield driven tunnel crossing rail yard.
Background technology
Along with the fast development of Construction of Urban Rail Traffic; shield method tunnel construction often can need to pass through intensive architectural complex, existing railway line; or close on the permanent construction and public utility etc. that have and must protect; strictly must control stratum settlement and displacement, this brings difficulty to shield method tunnel construction.When particularly running into the disadvantageous geologic conditions such as silty sand ground, sand pebble layer and water bearing ground, its construction is more difficult simultaneously; In shield-tunneling construction, easily produce the disasters such as surface settlement is excessive, ground caves in, very large threat is formed to the safety such as surrounding building, underground structure, pipeline, field of standing.Especially, under above-mentioned severe geological conditions, during Xia Chuan Large Fe way station field, large by field, station vehicle flowrate, the features such as the engineering time is short, its construction difficulty especially.
Summary of the invention
The present invention is intended to provide a kind of construction method that can adapt to the shield crossing rail yard of severe geological conditions.
The construction method of shield crossing rail yard of the present invention, comprises the step of following order:
A, surface grouting are reinforced;
Beat multiple injected hole stretching to inclination bottom rail track respectively from railroad platform both sides, insert mini-valve tube in each injected hole and synchronously carry out grouting and reinforcing to railway bed, reinforcement depth is not less than below flange of rail 4m; One-sided injected hole is quincuncial arrangement, and adjacent injected hole expands radius by the slurries that mini-valve tube injects and partly overlaps each other, and the slurries after expansion are connected altogether; The injected hole of both sides is parallel staggered in bottom, and the slurries injected by mini-valve tube in the injected hole of both sides are expanded radius and partly overlap each other, and the slurries after both sides are expanded connect altogether, form space network;
Slurries adopt dual slurry, and mixed by cement and water glass, wherein, the water/binder ratio of cement is 0.8:1, and concentration of sodium silicate is 40 Baume degrees (° B é), the volume ratio 1:1 of cement and water glass;
Grouting pressure is 0.2MPa, and flow rate of grouting is 10
~20L/min;
B, field, shield structure undercrossing tunnel station driving;
Shield machine steadily, at the uniform velocity advances bottom field, station; Controlling shield structure earth balance pressure power is 1.2 ~ 1.4bar, keeps native storehouse soil body position in storehouse in 1/3 ~ 1/2 position, ensures that screw machine front end invades dregs inner; Fltting speed controls at 35 ~ 45mm/min, and keep fltting speed, cutterhead rotating speed, speed of being unearthed and injection speed to match, the unearthed amount control of every ring is 60 ~ 65m
3;
In driving, there is space slip casting between periphery, section of jurisdiction and the soil body in even, continuous print, grouting amount controls 2.5-3.0 times in space, and grouting pressure controls at 0.16 ~ 0.2Mpa;
In driving, forwards add swell soil and foaming agent to improve the soil body, increase the stream plasticity of the soil body;
C, tunnel secondary grouting are reinforced;
After shield machine passes through, by arch, tunnel, reserve injected hole by section of jurisdiction outside tunnel, set many long steel floral tubes, carry out secondary supplement slip casting;
Slurries adopt dual slurry, and wherein, concentration of sodium silicate is 40 Baume degrees (° B é), and the water/binder ratio of cement is the volume ratio 1:1 of 0.8:1, cement and water glass; Grouting pressure is 0.5MPa;
Range of grouting is between 150 °-240 °, arch.
The construction method of shield crossing rail yard of the present invention, it can be one-sidedly connected after being expanded by two slurries that mini-valve tube injects, bilateral connects formation entirety altogether, make the soil body bottom rail track obtain integral reinforcing, well improve the self-stability of the soil body.By the dual slurry of special formulation, the diffusion velocity of conservative control mini-valve tube slurries and setting time, thus enable mini-valve tube inject the slurries rapid expansion of the soil body to required dilation angle, and fast and the slurries that inject of adjacent mini-valve tube fast freezing plastic strike up partnership.The control of boring parameter, ensure that the stable of excavation face, soil pressure and the conservative control measured that is unearthed, reduce soil disturbance, make land movement amount minimum, and by the high magnification synchronous grouting between lamellar body and the soil body, be filled with gap in time, and make lamellar body provide strong support force to the soil body, better avoid the soil body generation sedimentation in driving or cave in.After driving, arch is reinforced by injecting grout through steel perforated pipe, avoids the posterior settlement of the soil body.Described construction method, before integrated use driving, mini-valve tube earth's surface reinforces, to section of jurisdiction peripheral clearance high magnification synchronous grouting in driving, the method that after driving, in tunnel, steel floral tube secondary supplement mud jacking combines with shield driving state modulator, the omnibearing control achieved to solum settlement in the construction of field, shield crossing station, well overcome on stratum soft firmly lower, buried depth is more shallow, the objective factors such as station train operation is busy, achieve the tunneling construction of shield machine field, safe railroad crossing large-scale station in the upper soft lower hard compound stratum containing boulder bed, avoid the sedimentation on ground in construction, reduce the security risk of construction, achieve the construction of the shield crossing rail yard of severe geological conditions.
Accompanying drawing explanation
Fig. 1 is the constructing structure schematic diagram of shield crossing rail yard of the present invention.
Fig. 2 is one-sided mini-valve tube and slurries augmentation scenarios schematic diagram thereof.
Detailed description of the invention
A construction method for shield crossing rail yard, comprises the steps:
Beat multiple injected hole stretching to inclination bottom rail track respectively from railroad platform both sides, insert mini-valve tube in each injected hole and synchronously carry out grouting and reinforcing to railway bed, reinforcement depth is below flange of rail 4m.One-sided injected hole is quincuncial arrangement, and adjacent injected hole expands radius by the slurries that mini-valve tube injects and partly overlaps each other, and the slurries after expansion are connected, altogether as Fig. 2.The injected hole of both sides is parallel staggered in bottom, and the slurries injected by mini-valve tube in the injected hole of both sides are expanded radius and partly overlap each other, and the slurries after both sides are expanded connect altogether, form space network, as Fig. 1.Slurries adopt dual slurry, and mixed by cement and water glass, wherein, the water/binder ratio of cement is 0.8:1, and concentration of sodium silicate is 40 Baume degrees (° B é), the volume ratio 1:1 of cement and water glass; Grouting pressure is 0.2MPa, and flow rate of grouting is 10
~20L/min.
The angle of inclination of each injected hole of one-sided multiple injected holes can be each incomplete same, and part is identical, and part is different, or all different, and not identical angle of inclination makes the soil strength after reinforcing higher, better can resist the stressed of variant direction and angle.
Shield machine steadily, at the uniform velocity tunnels bottom field, station; Controlling shield structure earth balance pressure power is 1.2
~between 1.4bar, keep native storehouse soil body position in storehouse in 1/3 ~ 1/2 position, ensure that screw machine front end invades dregs inner, thus can spewing phenomenon be prevented; Fltting speed controls at 35 ~ 45mm/min, and keep fltting speed, cutterhead rotating speed, speed of being unearthed and injection speed to match, the unearthed amount of every ring controls at 60 ~ 65m
3; While driving, forwards add swell soil and foaming agent to improve the soil body, to increase the stream plasticity of the soil body; While driving, there is space slip casting between periphery, section of jurisdiction and the soil body in even, continuous print, grouting amount controls between 2.5 ~ 3.0 times of space, and grouting pressure controls at 0.16 ~ 0.2Mpa.
Wherein, soil pressure controls at 1.4bar, and fltting speed controls at 35mm/min, and the unearthed amount of every ring controls at 62m
3be equipped with as good, its soil disturbance is minimum, and land movement amount is minimum.
After shield machine passes through, in the scope by 150 ~ 240 degree, arch, tunnel, reserve injected hole by section of jurisdiction outside tunnel, set many long steel floral tubes, carry out secondary supplement slip casting; Slurries adopt dual slurry, and wherein, concentration of sodium silicate is 40 Baume degrees (° B é), and the water/binder ratio of cement is the volume ratio 1:1 of 0.8:1, cement and water glass; Grouting pressure is 0.5MPa.
Claims (3)
1. a construction method for shield crossing rail yard, is characterized in that: the step comprising following order:
A, surface grouting are reinforced;
Beat multiple injected hole stretching to inclination bottom rail track respectively from railroad platform both sides, insert mini-valve tube in each injected hole and synchronously carry out grouting and reinforcing to railway bed, reinforcement depth is not less than below flange of rail 4m; One-sided injected hole is quincuncial arrangement, and adjacent injected hole expands radius by the slurries that mini-valve tube injects and partly overlaps each other, and the slurries after expansion are connected altogether; The injected hole of both sides is parallel staggered in bottom, and the slurries injected by mini-valve tube in the injected hole of both sides are expanded radius and partly overlap each other, and the slurries after both sides are expanded connect altogether, form space network;
Slurries adopt dual slurry, and mixed by cement and water glass, wherein, the water/binder ratio of cement is 0.8:1, and concentration of sodium silicate is the volume ratio 1:1 of 40 Baume degrees, cement and water glass;
Grouting pressure is 0.2MPa, and flow rate of grouting is 10
~20L/min;
B, field, shield structure undercrossing tunnel station driving;
Shield machine steadily, at the uniform velocity advances bottom field, station; Controlling shield structure earth balance pressure power is 1.2 ~ 1.4bar, keeps native storehouse soil body position in storehouse in 1/3 ~ 1/2 position, ensures that screw machine front end invades dregs inner; Fltting speed controls at 35 ~ 45mm/min, and keep fltting speed, cutterhead rotating speed, speed of being unearthed and injection speed to match, the unearthed amount control of every ring is 60 ~ 65m
3;
In driving, there is space slip casting between periphery, section of jurisdiction and the soil body in even, continuous print, grouting amount controls 2.5-3.0 times in space, and grouting pressure controls at 0.16 ~ 0.2Mpa;
In driving, forwards add swell soil and foaming agent to improve the soil body, increase the stream plasticity of the soil body;
C, tunnel secondary grouting are reinforced;
After shield machine passes through, by arch, tunnel, reserve injected hole by section of jurisdiction outside tunnel, set many long steel floral tubes, carry out secondary supplement slip casting;
Slurries adopt dual slurry, and wherein, concentration of sodium silicate is 40 Baume degrees, and the water/binder ratio of cement is the volume ratio 1:1 of 0.8:1, cement and water glass; Grouting pressure is 0.5MPa;
Range of grouting is between 150 °-240 °, arch.
2. the construction method of shield crossing rail yard according to claim 1, is characterized in that: the angle of inclination of each injected hole of one-sided multiple injected holes is incomplete same.
3. the construction method of shield crossing rail yard according to claim 1, is characterized in that: in step B, and soil pressure controls at 1.4bar, and fltting speed controls at 35mm/min, and the unearthed amount of every ring controls at 62m
3.
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| CN201410137593.6A CN103899323B (en) | 2014-05-06 | 2014-05-06 | A kind of construction method of shield crossing rail yard |
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| CN201410137593.6A CN103899323B (en) | 2014-05-06 | 2014-05-06 | A kind of construction method of shield crossing rail yard |
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| CN103899323B true CN103899323B (en) | 2016-01-27 |
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Families Citing this family (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105888675A (en) * | 2016-06-22 | 2016-08-24 | 上海隧道工程有限公司 | Construction method for shield crossing railway line |
| CN106437723A (en) * | 2016-08-08 | 2017-02-22 | 中国矿业大学(北京) | Grouting method for controlling stratum settlement when shield tunneling machine passes through risk source |
| CN108005681B (en) * | 2017-10-16 | 2022-04-29 | 广州地铁设计研究院股份有限公司 | Compaction grouting method |
| CN108222954B (en) * | 2017-12-14 | 2020-05-05 | 上海隧道工程有限公司 | Construction method for shield to penetrate through sandstone material backfill area |
| CN111706337B (en) * | 2020-05-19 | 2022-07-15 | 北京城建中南土木工程集团有限公司 | Construction method for shield to penetrate high-speed rail |
| CN111608688B (en) * | 2020-05-27 | 2022-05-17 | 中铁建大桥工程局集团第二工程有限公司 | Method for reinforcing ground of shield underpass building |
| CN111560798B (en) * | 2020-05-29 | 2021-12-07 | 中铁二院工程集团有限责任公司 | Bidirectional adjusting device for deformation of roadbed of ballastless track high-speed railway, using method and construction method |
| CN112160758A (en) * | 2020-10-19 | 2021-01-01 | 中建八局轨道交通建设有限公司 | Construction method for slurry shield to penetrate through river dike |
| CN112228081A (en) * | 2020-10-24 | 2021-01-15 | 中铁一局集团有限公司 | Method for reinforcing pile foundation of shield tunnel side-through high-speed rail viaduct |
| CN112922610A (en) * | 2021-02-24 | 2021-06-08 | 中铁六局集团有限公司交通工程分公司 | Construction method for special railway line for downward passing freight by using shield tunneling machine |
| CN113931647A (en) * | 2021-08-31 | 2022-01-14 | 中铁三局集团有限公司 | Construction method for shield underpass railway line in sandy cobble stratum |
| CN114657817A (en) * | 2022-03-11 | 2022-06-24 | 中交第二公路勘察设计研究院有限公司 | Method for controlling deformation of roadbed of shield underpass railway in close range |
| CN114607391B (en) * | 2022-04-08 | 2023-05-09 | 中南大学 | Construction method for pre-reinforcing loose stratum of subway tunnel |
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Effective date of registration: 20170803 Address after: Three road 266100 in Shandong province Qingdao city Laoshan District No. 25 Keyuan latitude Co-patentee after: China Railway 25th Bureau Group Co., Ltd. Patentee after: THE 5TH ENGINEERING CO., LTD. OF CHINA RAILWAY 25TH BUREAU GROUP Address before: 510600, No. 55, Zhongshan Road, Yuexiu District, Guangdong, Guangzhou Co-patentee before: China Railway 25th Bureau Group Co., Ltd. Patentee before: Railway Transportation Engineering Co., Ltd. of China Railway 25th Bureau Group |
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