CN103924980A - Obstacle removing construction method - Google Patents
Obstacle removing construction method Download PDFInfo
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- CN103924980A CN103924980A CN201410168225.8A CN201410168225A CN103924980A CN 103924980 A CN103924980 A CN 103924980A CN 201410168225 A CN201410168225 A CN 201410168225A CN 103924980 A CN103924980 A CN 103924980A
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- freezing
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- Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
- Excavating Of Shafts Or Tunnels (AREA)
- Lining And Supports For Tunnels (AREA)
Abstract
The invention provides an obstacle removing construction method. The obstacle removing construction method includes the following steps that (1) the information and position of an obstacle are detected before construction so as to confirm a freezing consolidation area including the obstacle; (2) a horizontal freezing method is used for construction in the freezing consolidation area, so that the freezing consolidation area is frozen, and soil mass in the freezing consolidation area forms a frozen soil heavy curtain; (3) when the thickness of the frozen soil heavy curtain in the freezing consolidation area meets the underground excavation requirement, a mine underground excavation construction method is used for excavating a channel, and while excavation is conducted to the position of the obstacle, the obstacle can be removed through the channel. Compared with the prior art, the obstacle removing construction method has the advantages that obstacle removing is carried out without occupying ground space, the influence on environments is small, the completeness and usability of an original structure cannot be damaged, and the time limit for a project cannot be affected by external factors either.
Description
Technical field
The invention belongs to construction of tunnel technical field, be specifically related to a kind of construction method of removing obstacles.
Background technology
Along with the continuous development and utilization of urban underground space, in urban rail transit construction, the situation that constructing tunnel meets with obstruction gets more and more, this obstruction is generally pipeline, pile foundation etc., remove the principal element that these obstructions often become the engineering constraint duration, increase construction risk and surrounding enviroment impact, therefore how fast, safely, effectively process the problem that these obstructions are widely paid close attention to regard to becoming engineering circles.
At present, obstruction is removed the form generally adopt ground to pull out, and the ground conventional full-rotating drill of construction of removing obstacles carries out pile pulling and removes obstacles, and need take space of planes significantly, larger for traffic, the social environment influence of urban area; Manufactured place surface construction dust, noise are larger on dwelling environment impact around; Remove obstacles the integrality of original underground structure and usability caused to certain destruction in ground; Construction period is affected by the external environment larger, as rainy day etc.
Summary of the invention
The object of the invention is to overcome the existing defect of prior art, a kind of construction method of removing obstacles is now provided, abandoned original ground removal method, after adopting horizontal freezing that this Land in Regional Land is reinforced, the mode of constructing in conjunction with Mining Method tunneling is removed obstruction, thereby solved the destruction that adopts ground removal method to cause the integrality of original underground structure and usability, reduced the impact on surrounding environment, and accelerated construction speed.
The invention provides a kind of construction method of removing obstacles, comprise the following steps: detecting obstacles thing information and position before (1) construction, for the consolidation by freezing region of confirming to comprise obstruction; (2) in described consolidation by freezing region, adopt horizontal freezing to construct, described consolidation by freezing region is freezed so that the soil body in consolidation by freezing region forms Frozen Soil Cylinder; (3) thickness for the treatment of Frozen Soil Cylinder in described consolidation by freezing region reaches tunneling requirement, adopts tunneling method for constructing in mine to excavate passage, digs to Obstacle Position place described obstruction is removed by described passage.
Preferably, in step (1), detecting obstacles thing adopts any one or a few method in electromagnetic induction method, geological radar method, high-density electric and shallow layer seismic imaging technology method.
Preferably, in step (2), described horizontal freezing comprises: first consolidation by freezing region is set to boring, in hole, lay freezing pipe, refrigeration station be installed, to be installed in place after, by freezing pipe transporting low temperature salt solution, carry out interchange of heat again, absorb described freezing pipe heat around, described consolidation by freezing regional temperature is reduced, so that the freezing soil in described consolidation by freezing region forms Frozen Soil Cylinder.
The temperature range of the described hypothermic saline of preferably, carrying by described freezing pipe is between-28 to-30 ℃.
Preferably, in step (3), mine tunneling method for constructing comprises: cutter one portal, and excavation passage is set up temporary lining in described passage, and by the soil body outward transport of digging out, until excavate Obstacle Position, rid, and transported by passage.
Preferably, before excavation passage, a safety protective door need to be installed, then to be excavated open test pit, for confirming open test pit freezing efficiency, confirm qualifiedly just can excavate passage afterwards.
Preferably, in step (3), after obstruction is removed, need reduce to the structure of the passage soil body, the soil body backfill of digging out is entered to described passage, remove temporary lining built-in slip casting pipe simultaneously, while being backfilled to hole, shutoff hole is also pulled out freezing pipe, by built-in slip casting pipe, is filled slip casting.
Preferably, after slip casting to be filled completes substantially, then forced to thaw and thaw collapse slip casting in consolidation by freezing region.
A kind of construction method of removing obstacles provided by the invention, abandoned the existing ground form of construction work of removing obstacles, transfer the underground construction of removing obstacles to, first adopt horizontal freezing that need are excavated to the planning passage at obstruction place and freezed, confirm after consolidation by freezing effect, adopt again mine tunneling method for constructing, excavation passage, and rid, in conjunction with two kinds of methods, can remove obstacles without taking in the situation of ground space, and have fewer environmental impacts, to the integrality of original structure and usability, can not form destruction, the duration is not affected by extraneous factor can yet.
Accompanying drawing explanation
Fig. 1 is the remove obstacles flow process frame diagram of construction method of the present invention.
The specific embodiment
For the benefit of the understanding to structure of the present invention, describes below in conjunction with drawings and Examples.
Fig. 1 is the remove obstacles flow process frame diagram of construction method of the present invention.
Shown in Fig. 1, the construction method of removing obstacles provided by the invention, comprises the steps:
Step S1: detecting obstacles thing information and position before construction, for the consolidation by freezing region of confirming to comprise obstruction.Detecting obstacles thing adopts any one method in electromagnetic induction method, geological radar method, high-density electric and shallow layer seismic imaging technology method conventionally, because the utilization restriction of electromagnetic induction method is less, more flexible, so be preferably electromagnetic induction method in the present embodiment.
Step S2: adopt horizontal freezing to construct in described consolidation by freezing region, described consolidation by freezing region is frozen so that the soil body in consolidation by freezing region forms Frozen Soil Cylinder.
The concrete operations of horizontal freezing are: first consolidation by freezing region is set to boring, by drilling construction, figure arranges boring, and the biased difference in hole of boring should not be greater than 50mm, and the aperture of boring is 127mm.The actual drilling depth of freezing hole is answered the large 0.5m of wall projected depth.The deflection of boring should be controlled in 8 ‰, and pore-forming maximum spacing is not more than 2m.In boring, be laid with freezing pipe, further, this freezing pipe selects wall thickness to be not less than the φ 108 low-carbon (LC) seamless steel pipes of 7mm, single pipe length 2m to 4m, and the connection between freezing pipe adopts screwed connection, then is aided with hand welding, repair welding.Then near consolidation by freezing region, on ground, refrigeration station is being installed, freezing station equipment mainly comprises power distribution cabinet, refrigerator, brine tank, brine pump, clarified water pump, cooling tower and clear water reserviors etc., and equipment is installed and undertaken by the requirement of equipment operating manual.To be installed in place after, then carry out interchange of heat by freezing pipe transporting low temperature salt solution, absorb freezing pipe heat around, consolidation by freezing regional temperature is reduced, so that freezing soil forms freezing curtain in consolidation by freezing region.Conventionally the described hypothermic saline temperature range that freezing pipe is carried is controlled between-28～-30 degrees Celsius, and after general seven days, consolidation by freezing regional temperature is reduced to-20 degrees Celsius of left and right.Adopt the beneficial effect of horizontal freezing to be that the soil strength freezing is high, in freezing the soil body, excavate passage, can accomplish water-tight, for in-cavity construction is created a favorable environment, and construction safety, not limited by place, earth's surface and the degree of depth, less to surrounding environment influence, be particularly suitable for city proper underground construction.
Step S3: the thickness for the treatment of Frozen Soil Cylinder in described consolidation by freezing region reaches tunneling requirement, adopts tunneling method for constructing in mine to excavate passage, digs to Obstacle Position place described obstruction is removed.
The concrete steps of mine tunneling method for constructing are: a safety protective door is installed, in positive freezing process, to judge whether frost wall is handed over circle and reach design thickness according to observed temperature data, thermometric judgement closure of freezing wall also reaches design thickness and excavates open test pit again, confirms after the hydraulic pressure of the basic imporosity of soil layer, formally to excavate in frost wall again.During formal excavation, first cut portal, excavation passage, according to the stability of frost wall, enters and safeguards frozen state, safeguards that solidification point is-28 ° of C.In passage, set up temporary lining, and by the soil body outward transport of digging out, until excavate Obstacle Position, rid, and transported by passage.
Step S4: after obstruction cleaning thoroughly, the soil body backfill that ground settlement and tunnel is gone out, the passage of the backfill on one side soil body, remove temporary lining on one side, while built-in slip casting pipe in backfill passage, while being backfilled to hole, adopt steel concrete shutoff portal, pull out freezing pipe and stop consolidation by freezing, by built-in slip casting pipe, fill slip casting, in order to reduce ground loss, after slip casting to be filled completes substantially, then consolidation by freezing region is thawed and thaw collapse slip casting, when preventing that frozen water in consolidation by freezing region from melting, cause soil body thaw collapse, destroy original soil structures.
Basic principle of the present invention is: in tunnel, arrange horizontal frozen hole around; and the hypothermic saline that circulates in freezing hole, near the water bearing ground of freezing hole is frozen, form intensity high; the frost wall that closure is good then uses Mining Method to carry out tunnel excavation and construction under the protection of frost wall.Main sequence of construction of the present invention is: preparation of construction, and freezing hole construction, installs and freezes refrigeration system simultaneously, installs and freezes brine system and monitoring system, actively freeze, examination is dug, tunnel piercing and temporary lining, rid, the backfill soil body, fills slip casting, thaw collapse slip casting.
A kind of construction method of removing obstacles provided by the invention, abandoned the existing ground form of construction work of removing obstacles, transfer the underground construction of removing obstacles to, first adopt horizontal freezing that need are excavated to the planning passage at obstruction place and actively freezed, confirm after consolidation by freezing effect, adopt again mine tunneling method for constructing, excavation passage, and rid, in conjunction with two kinds of methods, can remove obstacles without taking in the situation of ground space, and have fewer environmental impacts, to the integrality of original structure and usability, can not form destruction, the duration is not affected by extraneous factor can yet.
Below embodiment has been described in detail the present invention by reference to the accompanying drawings, and those skilled in the art can make many variations example to the present invention according to the above description.Thereby some details in embodiment should not form limitation of the invention, the present invention will be usingd scope that appended claims defines as protection domain.
Claims (8)
1. the construction method of removing obstacles, is characterized in that, comprises the following steps:
(1) detecting obstacles thing information and position before construction, for the consolidation by freezing region of confirming to comprise obstruction;
(2) in described consolidation by freezing region, adopt horizontal freezing to construct, described consolidation by freezing region is freezed so that the soil body in consolidation by freezing region forms Frozen Soil Cylinder;
(3) thickness for the treatment of Frozen Soil Cylinder in described consolidation by freezing region reaches tunneling requirement, adopts tunneling method for constructing in mine to excavate passage, digs to Obstacle Position place described obstruction is removed by described passage.
2. the construction method of removing obstacles according to claim 1, it is characterized in that, in step (1), detecting obstacles thing adopts electromagnetic induction method, geological radar method, high-density electric and shallow layer seismic imaging technology method or adopts any combination in electromagnetic induction method, geological radar method, high-density electric and shallow layer seismic imaging technology method.
3. the construction method of removing obstacles according to claim 1, it is characterized in that, in step (2), described horizontal freezing comprises: first consolidation by freezing region is set to boring, lay freezing pipe in hole, refrigeration station is installed, to be installed in place after, then carry out interchange of heat by freezing pipe transporting low temperature salt solution, absorb described freezing pipe heat around, described consolidation by freezing regional temperature is reduced, so that the freezing soil in described consolidation by freezing region forms Frozen Soil Cylinder.
4. the construction method of removing obstacles according to claim 3, is characterized in that, the temperature range of the described hypothermic saline of carrying by described freezing pipe is between-28 to-30 ℃.
5. the construction method of removing obstacles according to claim 1, it is characterized in that, in step (3), mine tunneling method for constructing comprises: the door that holes, and excavation passage is set up temporary lining in described passage, and by the soil body outward transport of digging out, until excavate Obstacle Position, rid, and transported by passage.
6. the construction method of removing obstacles according to claim 5, is characterized in that, before excavation passage, a safety protective door need to be installed, and then excavates open test pit, for confirming open test pit freezing efficiency, confirms qualifiedly just can excavate passage afterwards.
7. the construction method of removing obstacles according to claim 6, it is characterized in that, in step (3), obstruction need reduce to the structure of the passage soil body after removing, and the soil body backfill of digging out is entered to described passage, remove temporary lining simultaneously, and built-in slip casting pipe, while being backfilled to hole, shutoff hole is also pulled out freezing pipe, by built-in slip casting pipe, is filled slip casting.
8. the construction method of removing obstacles according to claim 7, is characterized in that, also comprises: after slip casting to be filled completes substantially, then consolidation by freezing region is thawed and thaw collapse slip casting.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410168225.8A CN103924980B (en) | 2014-04-24 | 2014-04-24 | Remove obstacles construction method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410168225.8A CN103924980B (en) | 2014-04-24 | 2014-04-24 | Remove obstacles construction method |
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| CN103924980A true CN103924980A (en) | 2014-07-16 |
| CN103924980B CN103924980B (en) | 2016-09-07 |
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| CN201410168225.8A Active CN103924980B (en) | 2014-04-24 | 2014-04-24 | Remove obstacles construction method |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106761792A (en) * | 2017-01-20 | 2017-05-31 | 武汉市市政建设集团有限公司 | A kind of full-sleeve full-rotation drill sleeve and shield cutter preceding object thing sweep-out method |
| CN107060800A (en) * | 2017-03-09 | 2017-08-18 | 广东水电二局股份有限公司 | A kind of shield-tunneling construction huge stone handling construction method |
| CN107740596A (en) * | 2017-11-30 | 2018-02-27 | 中建三局第建设工程有限责任公司 | A kind of non-open cut Demolition Construction method of underground structure being drilled into |
| CN111058850A (en) * | 2019-11-13 | 2020-04-24 | 上海隧道工程有限公司 | Underground obstacle freezing, detecting and clearing method |
| CN112502715A (en) * | 2020-11-08 | 2021-03-16 | 上海市隧道工程轨道交通设计研究院 | Temporary plugging and reinforcing method for end of shield tunnel |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106761792A (en) * | 2017-01-20 | 2017-05-31 | 武汉市市政建设集团有限公司 | A kind of full-sleeve full-rotation drill sleeve and shield cutter preceding object thing sweep-out method |
| CN107060800A (en) * | 2017-03-09 | 2017-08-18 | 广东水电二局股份有限公司 | A kind of shield-tunneling construction huge stone handling construction method |
| CN107740596A (en) * | 2017-11-30 | 2018-02-27 | 中建三局第建设工程有限责任公司 | A kind of non-open cut Demolition Construction method of underground structure being drilled into |
| CN111058850A (en) * | 2019-11-13 | 2020-04-24 | 上海隧道工程有限公司 | Underground obstacle freezing, detecting and clearing method |
| CN111058850B (en) * | 2019-11-13 | 2021-05-28 | 上海隧道工程有限公司 | Underground obstacle freezing, detecting and clearing method |
| CN112502715A (en) * | 2020-11-08 | 2021-03-16 | 上海市隧道工程轨道交通设计研究院 | Temporary plugging and reinforcing method for end of shield tunnel |
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| Publication number | Publication date |
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| CN103924980B (en) | 2016-09-07 |
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Effective date of registration: 20151123 Address after: 200232 Shanghai city Xuhui District Wanping Road No. 1099 5 floor Applicant after: SHANGHAI TUNNEL ENGINEERING CO., LTD. Applicant after: SHANGHAI TUNNEL ENGINEERING CO., LTD. Applicant after: Shanghai tunneling shield Engineering Co., Ltd Address before: 200082 No. 118, Dalian Road, Shanghai, Yangpu District Applicant before: Shanghai Tunnel Engineering Co., Ltd. Applicant before: Shanghai tunneling shield Engineering Co., Ltd |
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