CN102996135B - Construction method for crossing for complex formation of shield under ultra-deep earth - Google Patents
Construction method for crossing for complex formation of shield under ultra-deep earth Download PDFInfo
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- CN102996135B CN102996135B CN201210529268.5A CN201210529268A CN102996135B CN 102996135 B CN102996135 B CN 102996135B CN 201210529268 A CN201210529268 A CN 201210529268A CN 102996135 B CN102996135 B CN 102996135B
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Abstract
The invention relates to a construction method for the crossing for a complex formation of a shield under ultra-deep earth, comprising the following specific steps of: 1, setting the front earth pressure of the shield; 2, improving the front earth body of the shield; 3, controlling the attitude of the shield; and 4, controlling synchronous grouting for the tail of the shield. Via the construction method disclosed by the invention, many difficulties and problems in shield construction in many complex formations can be solved, and mature ultra-deep shield tunnelling construction processes and construction technologies in sandy soil confined aquifers are formed to lay the foundation for the development of underground space exploitation to the deep in future, thus overcoming the limitation of shield projects in areas with many underground installations, and guaranteeing the sustainable development of underground shield tunnel project development and the universality of application.
Description
Technical field
The present invention relates to a kind of shield crossing bad ground construction method, especially a kind of ultra-deep earthing shield crossing bad ground construction method.
Background technology
Shield tunnel is as the important construction method of Construction of Urban Rail Traffic, the history in more than 20 years is had in the application of the urban rail transit construction of the domestic city such as Shanghai, Beijing, through the development in more than 20 years, construction technology reaches its maturity, but the utilization rate before this due to urban underground space is not high, the condition of underground space development is relatively better, the construction overwhelming majority of shield tunnel is before this positioned at Subsurface, and its buried depth of the shield tunnel related in Construction of Urban Rail Traffic is generally no more than 30m.And for the ultra-deep shield tunnel of edpth of tunnel more than 30m, no matter be heading equipment or construction technology, for domestic shield method tunnel construction enterprise, all also in the exploratory stage.
The present invention is directed to the feature of driving in tunnel super large buried depth, saturated sand and artesian aquifer, sharp radius curve section driving, for shield-tunneling construction equipment, the construction technology in small curve tunnel under the construction technology of shield tunnel in the compliance of super large buried depth, saturated sand and artesian aquifer, saturated sand and artesian aquifer, disadvantageous geologic condition is studied, target forms a set of construction technology for conditions of similarity, improve the technological reserve of enterprise, for the construction of later similar engineering provides experience.
Summary of the invention
The present invention will provide a kind of shield crossing bad ground construction method under ultra-deep earthing.
For achieving the above object, the technical solution used in the present invention is: a kind of ultra-deep earthing shield crossing complex random systems construction method, and concrete steps are as follows:
1) the soil pressure setting of shield structure head
According to the upper soft lower hard bad ground of the shield machine front soil body, setting shield structure head front soil pressure;
2) shield machine front soil improvement
When shield crossing hardpan and artesian aquifer, take householder method to improve the shield machine front soil body, be convenient to correctly set up shield machine earth balance pressure power;
3) TBM's position control
When shield machine is constructed in hard-soft heterogeneous ground, control shield attitude, for preventing, the section of jurisdiction of shield machine is cracked, misalignment of axe;
4) shield tail synchronous grouting controls
When shield machine is constructed in sandy soil layer, control synchronization grouting amount, sinks to causing shield attitude worsen after causing earth's surface posterior settlement and section of jurisdiction to deviate from shield tail for preventing synchronous grouting quantity not sufficient.
Shield machine front soil improvement.
The concrete establishing method of the soil pressure setting of shield structure head:
Utilize portal crane to weigh to the trunkful weight of the mud that often struggles against and empty weight, calculate and often advance the actual weight of being unearthed of a ring, and the side's of being converted into amount, obtain actual amount and the soil pressure of being unearthed of every ring; Or record shield machine often advances the actual revolution of the screw machine of a ring and compares, infer that each ring is unearthed and measure and soil pressure; Or calculate theoretical soil pressure according to geology reporting conditions.
The concrete grammar of shield machine front soil improvement:
1) hardpan adopts the cutterhead mode of adding water to improve:
1. find the equalization point that adds water under different fltting speed, ensure screw machine continuous excavation;
2. cutterhead should keep continuing to add water, and avoids forming interlayer in native storehouse;
2) artesian aquifer adopts mode such as filling foaming agent and polymer etc. to carry out soil improvement.
TBM's position control concrete grammar:
1. shield machine gross thrust is lowered: use cutter of backbreaking, shield shell touches wall antifriction slip casting, use the foaming agent improvement front soil body;
2. slip casting hoop: the section of jurisdiction holding out shield tail;
3. the paster material of cork is adopted.
The invention has the beneficial effects as follows:
The feature of driving, sharp radius curve section driving in construction method integrating tunnel super large buried depth of the present invention, saturated sand and artesian aquifer, for the construction technology of shield-tunneling construction equipment to shield tunnel in the compliance of super large buried depth, saturated sand and artesian aquifer, saturated sand and artesian aquifer, solve the construction technology difficult problem in small curve tunnel under disadvantageous geologic condition, define a set of construction method for conditions of similarity.
Construction method of the present invention to solve in many bad grounds difficult point and problem in shield-tunneling construction, form ultra-deep shield tunnel tunneling construction process, construction technology in ripe sandy soil artesian aquifer, for underground space development lays the first stone to Deep Development from now on, solve shield structure engineering in the limitation of underground installation compared with multizone, ensure the sustainable development of Tunnel Boring construction of tunnel exploitation and the popularity of application.
Detailed description of the invention
Below in conjunction with specific embodiment, set forth the present invention further.Should be understood that these embodiments are only not used in for illustration of the present invention to limit the scope of the invention.In addition should be understood that those skilled in the art can make various changes or modifications the present invention, and these equivalent form of values fall within the application's appended claims limited range equally after the content of having read the present invention's instruction.
The present invention marks the construction technology of engineering ultra-deep earthing shield crossing bad ground at Shanghai Rail Transit No. 12 lines 26, the tunnel that construct, and concrete working measure is:
1) the soil pressure setting of shield structure head
Soil pressure establishing method:
1. utilize portal crane to weigh to the trunkful weight of the mud that often struggles against and empty weight, calculate and often advance the actual weight of being unearthed of a ring, and the side's of being converted into amount, obtain actual amount and the soil pressure of being unearthed of every ring, compare with the theory amount of being unearthed.
2. record shield machine often advance the actual revolution of the screw machine of a ring and compare, infer each ring be unearthed measure and soil pressure whether reasonable.
3. theoretical soil pressure is calculated according to geology reporting conditions.
2) shield machine front soil improvement
The 6. layer hardpan adopt the cutterhead mode of adding water to improve:
1. find the equalization point that adds water under different fltting speed, ensure screw machine continuous excavation;
2. cutterhead should keep continuing to add water, and avoids forming interlayer in native storehouse;
The 7. 1,7. 2 layers of artesian aquifer adopt modes such as filling foaming agent and polymer etc. to carry out soil improvement
3) TBM's position control
When shield machine is constructed in hard-soft heterogeneous ground, TBM's position control is not good easily causes the problems such as section of jurisdiction is cracked, misalignment of axe, takes measures as follows:
1. gross thrust is lowered: use cutter of backbreaking, shield shell touches wall antifriction slip casting, use the foaming agent improvement front soil body;
2. slip casting hoop: the section of jurisdiction holding out shield tail;
3. adopt the paster material of cork, resistance to compression is good, and the section of jurisdiction rectifying effect improved when gross thrust reaches 3500t is obvious.
4) shield tail synchronous grouting controls
There is relatively big difference when constructing in synchronous grouting amount and argillic horizon when shield machine is constructed in sandy soil layer, sink to causing shield attitude to worsen after synchronous grouting quantity not sufficient may cause earth's surface posterior settlement and section of jurisdiction to deviate from shield tail.The every ring of sandy soil inter-sync grouting amount need reach about 4m
3.
Claims (3)
1. a ultra-deep earthing shield crossing complex random systems construction method, it is characterized in that, concrete steps are as follows:
1) the soil pressure setting of shield structure head
According to the upper soft lower hard bad ground of the shield machine front soil body, setting shield structure head front soil pressure: utilize portal crane to weigh to the trunkful weight of the mud that often struggles against and empty weight, calculate and often advance the actual weight of being unearthed of a ring, and the side's of being converted into amount, obtain actual amount and the soil pressure of being unearthed of every ring; Or record shield machine often advances the actual revolution of the screw machine of a ring and compares, infer that each ring is unearthed and measure and soil pressure; Or calculate theoretical soil pressure according to geology reporting conditions;
2) shield machine front soil improvement
When shield crossing hardpan and artesian aquifer, take householder method to improve the shield machine front soil body, be convenient to correctly set up shield machine earth balance pressure power;
3) TBM's position control
When shield machine is constructed in hard-soft heterogeneous ground, control shield attitude, for preventing, the section of jurisdiction of shield machine is cracked, misalignment of axe;
4) shield tail synchronous grouting controls
When shield machine is constructed in sandy soil layer, control synchronization grouting amount, sinks to causing shield attitude worsen after causing earth's surface posterior settlement and section of jurisdiction to deviate from shield tail for preventing synchronous grouting quantity not sufficient.
2. ultra-deep earthing shield crossing complex random systems construction method according to claim 1, is characterized in that: the concrete grammar of described shield machine front soil improvement:
1) hardpan adopts the cutterhead mode of adding water to improve:
1. find the equalization point that adds water under different fltting speed, ensure screw machine continuous excavation;
2. cutterhead should keep continuing to add water, and avoids forming interlayer in native storehouse;
2) artesian aquifer adopts filling foaming agent and polymeric version to carry out soil improvement.
3. ultra-deep earthing shield crossing complex random systems construction method according to claim 1, is characterized in that: described TBM's position control concrete grammar:
1. shield machine gross thrust is lowered: use cutter of backbreaking, shield shell touches wall antifriction slip casting, use the foaming agent improvement front soil body;
2. slip casting hoop: the section of jurisdiction holding out shield tail;
3. the paster material of cork is adopted.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210529268.5A CN102996135B (en) | 2012-12-11 | 2012-12-11 | Construction method for crossing for complex formation of shield under ultra-deep earth |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210529268.5A CN102996135B (en) | 2012-12-11 | 2012-12-11 | Construction method for crossing for complex formation of shield under ultra-deep earth |
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| CN102996135A CN102996135A (en) | 2013-03-27 |
| CN102996135B true CN102996135B (en) | 2015-06-24 |
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| CN103422864B (en) * | 2013-08-21 | 2016-01-06 | 国家电网公司 | Electric power tunnel passes through existed building process perturbations and moves construction control method |
| CN103603670B (en) * | 2013-11-21 | 2019-03-05 | 上海市基础工程集团有限公司 | Ultra-deep earthing shield crossing bad ground construction method |
| CN104389613B (en) * | 2014-09-26 | 2016-04-13 | 上海隧道工程有限公司 | Slurry balance shield passes through the construction method of jeopardously underground pipelines |
| CN104533432A (en) * | 2014-12-25 | 2015-04-22 | 上海市基础工程集团有限公司 | Construction method for shield to penetrate through buildings in old town of downtown in complex stratums |
| CN104912565B (en) * | 2015-05-05 | 2017-05-10 | 上海隧道工程股份有限公司 | Soil amount pressure balance shield control method and system |
| CN105525925B (en) * | 2015-10-30 | 2017-09-29 | 中铁十六局集团北京轨道交通工程建设有限公司 | Containing the construction method for wasting reduction shield machine cutter damage in rib rock compound stratum |
| CN105257307B (en) * | 2015-10-30 | 2017-09-29 | 上海交通大学 | It is a kind of to reduce the construction method that shield machine cutter is damaged in upper-soft lower-hard ground |
| CN109723447A (en) * | 2018-11-21 | 2019-05-07 | 上海市基础工程集团有限公司 | Shield continuously intensively passes through the construction method that different type rail hands over facility |
| CN109707385B (en) * | 2018-12-18 | 2021-05-28 | 上海隧道工程有限公司 | Intelligent synchronous grouting control method and system for shield construction |
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| GB2079349A (en) * | 1980-06-30 | 1982-01-20 | Iseki Kaihatsu Koki | Shield tunnelling method and machine therefor |
| CN1614196A (en) * | 2004-10-14 | 2005-05-11 | 上海隧道工程股份有限公司 | Ground deformation control for going through soft earth layer by double circular shielding |
| CN1932244A (en) * | 2006-09-28 | 2007-03-21 | 上海隧道工程股份有限公司 | Construction method for double-circular shield near-distance passing through building or structure |
| CN101126319A (en) * | 2007-10-09 | 2008-02-20 | 中铁二局股份有限公司 | Shield tunnel lateral cross-over pile base construction method |
| CN101294496A (en) * | 2008-06-25 | 2008-10-29 | 上海隧道工程股份有限公司 | Slip casting control shield attitude and deviation correcting construction method |
| CN101749025A (en) * | 2009-12-24 | 2010-06-23 | 上海隧道工程股份有限公司 | Improved construction method of soil mass of extra-large-diameter soil pressure balancing shield on soft soil stratum |
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Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2079349A (en) * | 1980-06-30 | 1982-01-20 | Iseki Kaihatsu Koki | Shield tunnelling method and machine therefor |
| CN1614196A (en) * | 2004-10-14 | 2005-05-11 | 上海隧道工程股份有限公司 | Ground deformation control for going through soft earth layer by double circular shielding |
| CN1932244A (en) * | 2006-09-28 | 2007-03-21 | 上海隧道工程股份有限公司 | Construction method for double-circular shield near-distance passing through building or structure |
| CN101126319A (en) * | 2007-10-09 | 2008-02-20 | 中铁二局股份有限公司 | Shield tunnel lateral cross-over pile base construction method |
| CN101294496A (en) * | 2008-06-25 | 2008-10-29 | 上海隧道工程股份有限公司 | Slip casting control shield attitude and deviation correcting construction method |
| CN101749025A (en) * | 2009-12-24 | 2010-06-23 | 上海隧道工程股份有限公司 | Improved construction method of soil mass of extra-large-diameter soil pressure balancing shield on soft soil stratum |
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| CN102996135A (en) | 2013-03-27 |
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