CN103590835A - PVC freezing pipe for shield tunneling freeze-consolidation - Google Patents
PVC freezing pipe for shield tunneling freeze-consolidation Download PDFInfo
- Publication number
- CN103590835A CN103590835A CN201310617131.XA CN201310617131A CN103590835A CN 103590835 A CN103590835 A CN 103590835A CN 201310617131 A CN201310617131 A CN 201310617131A CN 103590835 A CN103590835 A CN 103590835A
- Authority
- CN
- China
- Prior art keywords
- pvc
- pipe
- freezing
- consolidation
- tube body
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Landscapes
- Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
- Excavating Of Shafts Or Tunnels (AREA)
Abstract
A PVC freezing pipe for shield tunneling freeze-consolidation is used in a freeze-consolidation area. A shield tunneling machine penetrates through the freeze-consolidation area along the axis. The PVC freezing pipe comprises a pipe body, wherein the pipe body is made of PVC, the bottom end of the pipe body is sealed by a PVC pipe choke plug, a flange assembly is arranged at the other end of the pipe body, the flange assembly comprises a steel flange plate on the outer side and a PVC flange plate on the inner side, the steel flange plate is connected with the PVC flange plate, a liquid inlet pipe passes through the flange assembly and then stretches into the pipe body, and a liquid outlet pipe is further arranged on the pipe body. The PVC freezing pipe for shield tunneling freeze-consolidation is simple in structure, convenient to operate, and capable of meeting engineering strength and deformation requirements in shield tunneling saline water freezing design. Meanwhile, the freezing pipe can be directly cut off during shield tunneling and does not need to be pulled out after freezing is achieved, and therefore safety of shield tunneling is improved.
Description
Technical field
The present invention relates to the freezing technology field in shield structure turnover hole, relate in particular to a kind of shield structure turnover hole consolidation by freezing PVC freezing pipe.
Background technology
Artificial stratum freezing process; to utilize artificial cooling technology; make the water freezing in the ground of stratum; natural ground is become to frozen soil; increase its strength and stability; contacting of isolated underground water and underground construction, to carry out the special construction technology of underground engineering construction under the protection of frost wall, its essence is and utilize artificial cooling Iterim Change rock and soil properties with strengthening stratum.Artificial Soil stratum freezing process is not owing to being substantially subject to the restriction of supporting scope and the supporting degree of depth, can effectively prevent that water burst and city from excavating, adjacent soil deformation and be subject to more and more right attention in Drilling construction, becomes the Main Means of underground construction.
Development along with city; greatly develop underground rail rapid transit and seem more and more urgent; and adopt shield method to build tunnel or various underground pipeline; become the key of development underground traffic; in the operation of the turnover hole of shield structure; soil stabilization technology is the important procedure that shield method is built tunnel, directly affects quality, the effect of inlet and outlet cave place environmental protection and the success or failure of engineering construction of conduit axis, and freezes the key that rule is soil stabilization technology.
Existing freezing process, what generally adopt is low-carbon (LC) seamless steel pipe, but the shield machine using at city tunnel mostly is weak soil shield structure, cutterhead cannot excise the steel freezing pipe of squeezing into the soil body, thereby cause difficulty to the propelling of shield structure, therefore in order to complete smoothly shield structure, pull out and freeze steel pipe.
And in pulling out, be prone to two problems: 1, need to circulate with hot salt brine during tube drawing, and the time of circulation is difficult to grasp, time, too short freezing pipe was difficult to pull out, and easily cause fracture of freezing pipe, overlong time can cause frozen soil wall to melt too much, may cause a large amount of water, silt by the freezing hole ground that gushes out, and causes portal to cave in; 2, be prone to fracture of freezing pipe during tube drawing, cause freezing pipe residual, to shield machine turnover hole, cause very large risk.
For this reason, designer of the present invention is because above-mentioned defect, by concentrating on studies and designing, is comprehensively engaged in for a long time experience and the achievement of related industry for many years, and research and design goes out a kind of shield structure turnover hole consolidation by freezing PVC freezing pipe, to overcome above-mentioned defect.
Summary of the invention
The technical problem to be solved in the present invention is: existing freezing process, and what generally adopt is low-carbon (LC) seamless steel pipe, and easily causes in freezing steel pipe a large amount of water, silt to cause portal to cave in by the freezing hole ground that gushes out pulling out; And be prone to fracture of freezing pipe and residual, to shield machine turnover hole, cause very large risk.
For solving this technical problem, the invention discloses a kind of shield structure turnover hole consolidation by freezing PVC freezing pipe, be applied in consolidation by freezing district, shield machine runs through described consolidation by freezing district along axis, it is characterized in that:
Described PVC freezing pipe is containing tube body, described tube body is made by PVC, its bottom is silently closed by pvc pipe, the other end is provided with flange assembly, the steel flanges dish that described flange assembly comprises outside and the PVC flange of inner side, described steel flanges dish and PVC flange interconnect, and a feed tube passes described flange assembly and stretches in described tube body; On described tube body, be also provided with a drain pipe.
Wherein: described drain pipe is by the internal communication of a PVC tee piece and described tube body.
Wherein: described tube body is formed by connecting by multistage pvc pipe, in the junction of each pvc pipe, be provided with PVC connector to strengthen the intensity of junction.
Wherein: described drain pipe also passes flange assembly and stretches in tube body.
Wherein: described feed tube is connected to cold moving saline container by pump, and described drain pipe is connected to chilled brine container.
Known by said structure, shield structure turnover of the present invention hole consolidation by freezing PVC freezing pipe has following technique effect:
1, simple in structure, easy to operate, in the brine freezing design of shield structure turnover hole, meet engineering strength and deformation requirements;
2, need not pull out freezing pipe after having freezed, shield structure can directly cut freezing pipe, improves the safety in shield structure turnover hole.
Detailed content of the present invention can obtain by explanation described later and institute's accompanying drawing.
Accompanying drawing explanation
Fig. 1 is the application schematic diagram of shield structure turnover of the present invention hole consolidation by freezing PVC freezing pipe;
Fig. 2 is the structural representation of shield structure turnover hole consolidation by freezing PVC freezing pipe the first embodiment of the present invention;
Fig. 3 is the internal construction schematic diagram of Fig. 2;
Fig. 4 is the structural representation of second embodiment of the invention.
The specific embodiment
Below in conjunction with drawings and Examples, the specific embodiment of the present invention is further described, following examples are only for technical scheme of the present invention is more clearly described, and can not limit the scope of the invention with this.
As shown in Figure 1, the concrete technical scheme of implementing of the present invention is: shield structure turnover hole consolidation by freezing PVC freezing pipe 102, be applied in consolidation by freezing district 103, and shield machine runs through described consolidation by freezing district 103 along axis 103 with arrow 104 directions.
Referring to Fig. 2 and Fig. 4, one embodiment of shield structure turnover of the present invention hole consolidation by freezing PVC freezing pipe comprises tube body 5, described tube body 5 is by PVC(Polyvinyl chloride polymer) make, its bottom is by pvc pipe 7 closures silently, the other end is provided with flange assembly, the steel flanges dish 1 that described flange assembly comprises outside and the PVC flange 2 of inner side, described steel flanges dish 1 and PVC flange 2 interconnect, and a feed tube passes described flange assembly and stretches in described tube body 5.
On described tube body 5, be also provided with a drain pipe 4, referring to Fig. 2 and Fig. 3, described drain pipe 4 is the internal communication with described tube body 5 by a PVC tee piece 3.
Wherein, described tube body 5 can be formed by connecting by multistage pvc pipe, is provided with PVC connector 6 to strengthen the intensity of junction in the junction of each pvc pipe.
Wherein, described feed tube can be connected to cold moving saline container by pump, and described drain pipe is connected to chilled brine container, and described chilled brine container is provided with freezing unit.
Referring to Fig. 4, in another embodiment, drain pipe also can be passed to flange assembly and stretches in tube body, with conserve space, avoided multicompartment.
In practicality, surperficial by test of many times:
(1) flexural stress, radial pressure that the temperature, pressure causing at hypothermic saline, different soil frost heave cause are poor, do not occur PVC freezing pipe generation brittle fracture, and salt solution Seepage meets shield brine freezing and reinforces the requirement to freezing hole watertightness.
(2) PVC freezing pipe coefficient of thermal conductivity 0.2w/ (m. ℃), the coefficient of thermal conductivity 40w/ (m. ℃) of steel pipe, from data, analyze, the coefficient of thermal conductivity of pvc pipe is 0.005 times of steel pipe, there is very large difference with steel pipe, actual freezing efficiency analysis, PVC freezing pipe outside wall temperature and brine temp differ larger, maximum temperature difference reaches 11.5 ℃, along with the continuity of freezing, the increase of freeze-off time, frozen soil plate region increases gradually, the temperature of PVC freezing hole tube wall significantly decreases, the temperature difference reduces gradually, freezing the middle and later periods, brine temp is stable at-30 ℃, temperature minimum the reaching-25 ℃ of PVC freezing pipe outer wall, and be stabilized in-25 ℃, and be stabilized in 5 ℃ with the brine temp temperature difference, and average temperature is lower.Evidence, the in the situation that of proper extension freeze-off time, PVC freezing pipe is to meet the thermal conductivity demand that shield brine freezing is reinforced.
(3) fragment of collecting from test is added up, shield driving can be by the size general control of freezing pipe fragmentation in 100mm left and right, easily directly by screw propeller, be unearthed, therefore in the brine freezing strengthening construction of shield, because PVC plastic pipe can directly be cut propelling by shield structure, do not need to pull out freezing pipe, reduce construction risk.
As can be seen here, the invention has the advantages that:
1, simple in structure, easy to operate, in the brine freezing design of shield structure turnover hole, meet engineering strength and deformation requirements;
2, need not pull out freezing pipe after having freezed, shield structure can directly cut freezing pipe, improves the safety in shield structure turnover hole.
The above is only preferential embodiment of the present invention; it should be pointed out that for those skilled in the art, do not departing under the prerequisite of the technology of the present invention principle; can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (5)
1. a shield structure turnover hole consolidation by freezing PVC freezing pipe, is applied in consolidation by freezing district, and shield machine runs through described consolidation by freezing district along axis, it is characterized in that:
Described PVC freezing pipe is containing tube body, described tube body is made by PVC, its bottom is silently closed by pvc pipe, the other end is provided with flange assembly, the steel flanges dish that described flange assembly comprises outside and the PVC flange of inner side, described steel flanges dish and PVC flange interconnect, and a feed tube passes described flange assembly and stretches in described tube body; On described tube body, be also provided with a drain pipe.
2. PVC freezing pipe according to claim 1, is characterized in that: described drain pipe is by the internal communication of a PVC tee piece and described tube body.
3. PVC freezing pipe according to claim 1, is characterized in that: described tube body is formed by connecting by multistage pvc pipe, is provided with PVC connector to strengthen the intensity of junction in the junction of each pvc pipe.
4. PVC freezing pipe according to claim 1, is characterized in that: described drain pipe also passes flange assembly and stretches in tube body.
5. according to arbitrary described PVC freezing pipe in claim 1-4, it is characterized in that: described feed tube is connected to cold moving saline container by pump, and described drain pipe is connected to chilled brine container.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310617131.XA CN103590835A (en) | 2013-11-28 | 2013-11-28 | PVC freezing pipe for shield tunneling freeze-consolidation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310617131.XA CN103590835A (en) | 2013-11-28 | 2013-11-28 | PVC freezing pipe for shield tunneling freeze-consolidation |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103590835A true CN103590835A (en) | 2014-02-19 |
Family
ID=50081131
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310617131.XA Pending CN103590835A (en) | 2013-11-28 | 2013-11-28 | PVC freezing pipe for shield tunneling freeze-consolidation |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103590835A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104806815A (en) * | 2015-04-20 | 2015-07-29 | 北京中煤矿山工程有限公司 | Method for using high-density PVC (polyethylene) pipe as low-temperature saline efficient conveying pipe |
| CN107489427A (en) * | 2017-10-10 | 2017-12-19 | 南昌轨道交通集团有限公司地铁项目管理分公司 | A kind of water-rich sand layer shield launching termination ruggedized construction and its construction method |
| CN108005663A (en) * | 2017-12-18 | 2018-05-08 | 上海市基础工程集团有限公司 | Export ＆ import exempts from tube drawing consolidation by freezing construction method |
| CN108843336A (en) * | 2018-07-02 | 2018-11-20 | 中国铁建重工集团有限公司 | Development machine, development machine cutterhead and cutter replacing method |
| CN109882184A (en) * | 2019-03-20 | 2019-06-14 | 中国建筑第八工程局有限公司 | The construction method of freezing process tunneling |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000054785A (en) * | 1998-08-03 | 2000-02-22 | Kajima Corp | Renewal shield tunneling |
| CN201539261U (en) * | 2009-11-30 | 2010-08-04 | 北京中煤矿山工程有限公司 | Pull-out-free freezing device |
| CN102392653A (en) * | 2011-10-21 | 2012-03-28 | 同济大学 | Bent pipe one-sided freezing method for shield docking of stratum and freezing pipe driving device |
| CN203547756U (en) * | 2013-11-28 | 2014-04-16 | 北京中煤矿山工程有限公司 | Shield tunnel freezing-consolidation PVC freezing pipe |
-
2013
- 2013-11-28 CN CN201310617131.XA patent/CN103590835A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000054785A (en) * | 1998-08-03 | 2000-02-22 | Kajima Corp | Renewal shield tunneling |
| CN201539261U (en) * | 2009-11-30 | 2010-08-04 | 北京中煤矿山工程有限公司 | Pull-out-free freezing device |
| CN102392653A (en) * | 2011-10-21 | 2012-03-28 | 同济大学 | Bent pipe one-sided freezing method for shield docking of stratum and freezing pipe driving device |
| CN203547756U (en) * | 2013-11-28 | 2014-04-16 | 北京中煤矿山工程有限公司 | Shield tunnel freezing-consolidation PVC freezing pipe |
Non-Patent Citations (2)
| Title |
|---|
| 崔兵兵等: "聚氯乙烯盐水冻结管在盾构进洞中的工艺性能分析", 《城市轨道交通研究》 * |
| 方大千，方欣等编著: "《建筑电气安装技术问答》", 31 March 2007, 北京：金盾出版社 * |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104806815A (en) * | 2015-04-20 | 2015-07-29 | 北京中煤矿山工程有限公司 | Method for using high-density PVC (polyethylene) pipe as low-temperature saline efficient conveying pipe |
| CN107489427A (en) * | 2017-10-10 | 2017-12-19 | 南昌轨道交通集团有限公司地铁项目管理分公司 | A kind of water-rich sand layer shield launching termination ruggedized construction and its construction method |
| CN108005663A (en) * | 2017-12-18 | 2018-05-08 | 上海市基础工程集团有限公司 | Export ＆ import exempts from tube drawing consolidation by freezing construction method |
| CN108843336A (en) * | 2018-07-02 | 2018-11-20 | 中国铁建重工集团有限公司 | Development machine, development machine cutterhead and cutter replacing method |
| CN108843336B (en) * | 2018-07-02 | 2024-02-02 | 中国铁建重工集团股份有限公司 | Heading machine, heading machine cutterhead and cutter changing method |
| CN109882184A (en) * | 2019-03-20 | 2019-06-14 | 中国建筑第八工程局有限公司 | The construction method of freezing process tunneling |
| CN109882184B (en) * | 2019-03-20 | 2021-02-26 | 中国建筑第八工程局有限公司 | Construction method for excavating tunnel by freezing method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106285605B (en) | A kind of microwave liquid nitrogen collaboration freeze thawing coal seam anti-reflection method | |
| CN103590835A (en) | PVC freezing pipe for shield tunneling freeze-consolidation | |
| CN104213932B (en) | A kind of projecting coal bed waterpower phase transformation fracturing coal uncovering method | |
| CN104213921B (en) | Based on the freezing type coal uncovering method of hydraulic slotted liner technique | |
| CN104653185B (en) | One freezes the adjustable frigo of segment length and freezing method thereof | |
| AU2015299587A1 (en) | Enhanced phase-change fracking gas extraction method for low-permeability coal bed | |
| CN201077982Y (en) | Partial freezing device | |
| CN201460904U (en) | Ultra-long horizontal freezing consolidation structure for shield entry | |
| CN202881927U (en) | Liquid nitrogen freezer for segmental freeze | |
| CN206052685U (en) | Screw thread freezing pipe | |
| CN103898895B (en) | Coaxial for liquid back pipe frigo | |
| CN105239585A (en) | In-pile freezing structure of deep underground space and constructing method | |
| CN105756648A (en) | Phase-changing transformation method of coal reservoir | |
| CN106592573A (en) | Freezer-free liquid nitrogen artificial ground freezing method | |
| CN104088652A (en) | Method for horizontal dynamic controlled-freezing water stopping between pipe roofs | |
| CN103234076A (en) | Device for exchanging underground pipelines without trenching and application method thereof | |
| CN110878697A (en) | Shield underwater receiving method next to urban main road in high-water-rich sandy gravel stratum | |
| CN106285695A (en) | A kind of shield tunnel termination microorganism ruggedized construction and construction method thereof | |
| CN203547756U (en) | Shield tunnel freezing-consolidation PVC freezing pipe | |
| CN103924980B (en) | Remove obstacles construction method | |
| CN101696572B (en) | Freezer with gas guide structure | |
| CN203808045U (en) | Freezer for coaxial liquid supply pipe and liquid return pipe | |
| CN201539261U (en) | Pull-out-free freezing device | |
| CN102720465B (en) | Method for forcibly unfreezing frozen hole | |
| JP2003239270A (en) | Freezing method and pipe material used for the same |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C12 | Rejection of a patent application after its publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20140219 |