CN103016012A - Freezing reinforcement method for controlling multidirectional risk in shield tunneling machine going in or out of tunnel - Google Patents
Freezing reinforcement method for controlling multidirectional risk in shield tunneling machine going in or out of tunnel Download PDFInfo
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- CN103016012A CN103016012A CN201210584075XA CN201210584075A CN103016012A CN 103016012 A CN103016012 A CN 103016012A CN 201210584075X A CN201210584075X A CN 201210584075XA CN 201210584075 A CN201210584075 A CN 201210584075A CN 103016012 A CN103016012 A CN 103016012A
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- freezing
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- shield machine
- tunneling machine
- shield tunneling
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- Excavating Of Shafts Or Tunnels (AREA)
- Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
Abstract
The invention discloses a freezing reinforcement method for controlling multi-bearing risk in shield tunneling machine going in or out of a tunnel, and belongs to the freezing reinforcement method for shield tunneling machine going in or out of the tunnel. The method comprises the following steps: designing and arranging freezing holes, determining freezing parameters, constructing the freezing holes, starting a shield tunneling machine to actively freeze; maintaining freezing in shield tunneling machine going in or out of the tunnel; synchronously monitoring in construction; and grouting in a thaw settlement manner. The thickness of the plate frozen and reinforced by the method is determined through calculation; the length (exceeding the shield tunneling machine body by 1 to 2 circles) of a freezing outer sleeve warping the shield tunneling machine body is determined according to the length of the shield tunneling machine body, and then the freezing holes are designed in such a way that inner rings and outer rings are arranged; and the distance between the freezing holes of the inner rings can be properly increased through using the advantages of holes freezing. The method has the advantages that the construction is simple, all possible water outlet passages around the shield tunneling machine are blocked effectively, and the safety degree is high.
Description
Technical field
The present invention relates to a kind of shield structure turnover hole multi-faceted risk control consolidation by freezing method, belong to shield structure turnover hole consolidation by freezing method.Mainly be applicable to the consolidation by freezing of shield structure turnover hole soft layer, to carrying out soil stabilization under the complicated unstable geology conditions such as water burst, quicksand, mud, high hydraulic pressure and highland pressure, its advantage is particularly evident.
Background technology
Industry generally believes: during consolidation by freezing, outer ring consolidation by freezing body sleeve parcel shield machine body is longer, more favourable to control shield structure turnover hole risk, but have document to show, frozen soil and shield machine steel component housing external surface are freezing intensity (shear strength), suppose brine freezing, shield structure-frozen soil is freezing surface temperature also can reach-10 ℃, and minimum value is got and frozen intensity 0.5MPa, and general shield machine thrust is about 3000t, metro shield external diameter 6.34m then calculates actual outer sleeve and freezes length only for 3m.Can't realize that by this multi-faceted risk control consolidation by freezing in theoretical shield structure turnover hole this also is the main cause that shield structure turnover hole multi-faceted risk control consolidation by freezing technology fails to drop into engineering practice always.And the shield structure that takes place frequently turnover hole risk is in the urgent need to safer turnover hole soil stabilization method.
Summary of the invention
In order to address the above problem, the invention provides a kind of shield structure turnover hole multi-faceted risk control consolidation by freezing method, by analyzing the shield machine structure as can be known, shield structure turnover hole construction, the cutter head of shield machine cutting soil body advances, because cutterhead than the about 20mm of housing, forms slight void between shield machine housing and frozen soil in the cutting soil body process, housing and frozen soil were not closely to freeze when sleeve had been freezed in the firm propelling of shield machine, adopted multi-faceted risk control consolidation by freezing feasible.
The present invention realizes with following technical scheme: a kind of shield structure turnover hole multi-faceted risk control consolidation by freezing method, take plate consolidation by freezing body to block the exhalant canal in shield machine the place ahead, make outer sleeve consolidation by freezing body parcel and surpass the shield machine body, can utilize the outer ring freezing hole to safeguard freezes, shield driving is cut the small pipelined channel sealing that forms in the soil body process, simultaneously because the whole parcel shield machine of consolidation by freezing body body, also for utilizing the shield machine body slip casting condition of providing convenience, can be in frozen soil and section of jurisdiction, form slip casting sealing hoop between frozen soil and the shield machine shell, completely cut off the exhalant canal of shield machine afterbody.Concrete steps are:
1) freezes the thickness of body by the calculative determination plate;
2) determine that according to the shield machine body length outer sleeve freezes length;
3) position, design arrangement freezing hole hole;
4) drilling construction;
5) start is actively freezed;
6) safeguard during the shield structure turnover hole and freeze;
7) whole construction period freezes and Environmental Monitoring synchronously;
8) stop to freeze, cut off freezing pipe and sealing of hole, thaw collapse slip casting.
Described outer sleeve freezes length and surpasses shield machine body 1～2 ring.
The mode that the layout of described freezing hole adopts inside and outside circle multi-turn to arrange, the advantage that freeze in the arrangement pitch utilization group hole of inner ring freezing hole is amplified.
Good effect of the present invention is: the present invention has constructing operation and simply, has effectively blocked all possible exhalant canal of shield machine periphery, the advantage that degree of safety is high, be applicable to the shield structure turnover hole soil stabilization construction of all kinds of soft soil layers, to carrying out soil stabilization under the complicated unstable geology conditions such as water burst, quicksand, mud, high hydraulic pressure and highland pressure, its advantage is particularly evident.
Description of drawings
Below in conjunction with the drawings and specific embodiments method of the present invention is described in further detail.
Fig. 1 is that the present invention passes in and out hole risk control schematic diagram.
Among the figure: 1, shield machine body, 2, outer sleeve consolidation by freezing body, 3, plate consolidation by freezing body.
The specific embodiment
A kind of shield structure turnover hole multi-faceted risk control consolidation by freezing method is: the thickness by calculative determination plate consolidation by freezing body → determine that according to the shield machine body length outer sleeve freezes length, outer sleeve freezes the mode that layout that length surpasses shield machine body 2 ring → design arrangement freezing holes, freezing hole adopts inside and outside circle multi-turn to arrange, the advantage that freeze in the arrangement pitch utilization group hole of inner ring freezing hole amplify → determine freezing parameters → freezing hole construction → start actively freeze → pass in and out the hole in conjunction with shield machine to safeguard and freeze → construct Simultaneous Monitoring → thaw collapse slip casting.As shown in Figure 1, plate consolidation by freezing 3 bodies have been blocked the exhalant canal in shield machine the place ahead; Make outer sleeve consolidation by freezing body parcel and surpass the shield machine body, when shield machine body 1 be advanced to outer sleeve consolidation by freezing body 2 interior after, can utilize the outer ring freezing hole to safeguard freezes, shield driving is cut the small pipelined channel sealing that forms in the soil body process, simultaneously because the whole parcel shield machine of consolidation by freezing body body, also for utilizing the shield machine body slip casting condition of providing convenience, can between frozen soil and section of jurisdiction, frozen soil and shield machine shell, form slip casting sealing hoop, completely cut off the exhalant canal of shield machine afterbody.
Claims (3)
1. a shield structure turnover hole multi-faceted risk control consolidation by freezing method is characterized in that: by the thickness of calculative determination plate consolidation by freezing body, determine that according to the shield machine body length outer sleeve freezes length, then carry out the design arrangement of freezing hole; Plate consolidation by freezing body has been blocked the exhalant canal in shield machine the place ahead; Make outer sleeve consolidation by freezing body parcel and surpass the shield machine body, utilizing the outer ring freezing hole to safeguard freezes, shield driving is cut the small pipelined channel sealing that forms in the soil body process, simultaneously because the whole parcel shield machine of consolidation by freezing body body, also for utilizing the shield machine body slip casting condition of providing convenience, can be on freezing and the section of jurisdiction, freeze on and form slip casting sealing hoop between the shield machine shell, completely cut off the exhalant canal of shield machine afterbody; Concrete steps are:
1) freezes the thickness of body by the calculative determination plate;
2) determine that according to the shield machine body length outer sleeve freezes length;
3) position, design arrangement freezing hole hole;
4) drilling construction;
5) start is freezed;
6) safeguard during the shield structure turnover hole and freeze;
7) whole construction period freezes and Environmental Monitoring synchronously;
8) stop to freeze, cut off freezing pipe and sealing of hole, thaw collapse slip casting.
2. according to the described shield structure of claim l turnover hole multi-faceted risk control consolidation by freezing method, it is characterized in that: step 2) described in outer sleeve freeze length and surpass shield machine body 1～2 ring.
3. shield structure according to claim 1 passes in and out hole multi-faceted risk control consolidation by freezing method, it is characterized in that: the mode that the layout of described freezing hole adopts inside and outside circle multi-turn to arrange, the advantage that freeze in the arrangement pitch utilization group hole of inner ring freezing hole is amplified.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210584075XA CN103016012A (en) | 2012-12-28 | 2012-12-28 | Freezing reinforcement method for controlling multidirectional risk in shield tunneling machine going in or out of tunnel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210584075XA CN103016012A (en) | 2012-12-28 | 2012-12-28 | Freezing reinforcement method for controlling multidirectional risk in shield tunneling machine going in or out of tunnel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103016012A true CN103016012A (en) | 2013-04-03 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210584075XA Pending CN103016012A (en) | 2012-12-28 | 2012-12-28 | Freezing reinforcement method for controlling multidirectional risk in shield tunneling machine going in or out of tunnel |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111365011A (en) * | 2020-04-18 | 2020-07-03 | 中铁工程装备集团有限公司 | Shield tunneling machine with function of rapidly freezing tunnel face and construction method |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101463724A (en) * | 2008-12-30 | 2009-06-24 | 上海隧道工程股份有限公司 | Construction method for connection passage by double-row hole horizontal freezing method |
| CN201460904U (en) * | 2009-06-29 | 2010-05-12 | 上海市基础工程公司 | Ultra-long horizontal freezing consolidation structure for shield entry |
-
2012
- 2012-12-28 CN CN201210584075XA patent/CN103016012A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101463724A (en) * | 2008-12-30 | 2009-06-24 | 上海隧道工程股份有限公司 | Construction method for connection passage by double-row hole horizontal freezing method |
| CN201460904U (en) * | 2009-06-29 | 2010-05-12 | 上海市基础工程公司 | Ultra-long horizontal freezing consolidation structure for shield entry |
Non-Patent Citations (3)
| Title |
|---|
| 丁利红: "冻结法盾构进出洞施工技术", 《特种结构》 * |
| 嵇彭: "盾构进出洞全方位风险控制冻结加固技术", 《中国工程科学》 * |
| 李广军: "冻结加固地层中盾构进出端头井施工风险研究", 《建筑科学》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111365011A (en) * | 2020-04-18 | 2020-07-03 | 中铁工程装备集团有限公司 | Shield tunneling machine with function of rapidly freezing tunnel face and construction method |
| CN111365011B (en) * | 2020-04-18 | 2022-02-08 | 中铁工程装备集团有限公司 | Shield tunneling machine with function of rapidly freezing tunnel face and construction method |
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Application publication date: 20130403 |