CN203547756U - Shield tunnel freezing-consolidation PVC freezing pipe - Google Patents
Shield tunnel freezing-consolidation PVC freezing pipe Download PDFInfo
- Publication number
- CN203547756U CN203547756U CN201320764868.XU CN201320764868U CN203547756U CN 203547756 U CN203547756 U CN 203547756U CN 201320764868 U CN201320764868 U CN 201320764868U CN 203547756 U CN203547756 U CN 203547756U
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- China
- Prior art keywords
- pvc
- freezing
- pipe
- consolidation
- tube body
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- Expired - Lifetime
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- 238000007710 freezing Methods 0.000 title claims abstract description 76
- 230000008014 freezing Effects 0.000 title claims abstract description 76
- 238000007596 consolidation process Methods 0.000 title claims abstract description 21
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 16
- 239000010959 steel Substances 0.000 claims abstract description 16
- 239000012267 brine Substances 0.000 claims abstract description 14
- HPALAKNZSZLMCH-UHFFFAOYSA-M sodium;chloride;hydrate Chemical compound O.[Na+].[Cl-] HPALAKNZSZLMCH-UHFFFAOYSA-M 0.000 claims abstract description 14
- 230000007306 turnover Effects 0.000 claims description 18
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 claims description 4
- 239000011780 sodium chloride Substances 0.000 claims description 4
- 238000004891 communication Methods 0.000 claims description 3
- 238000013461 design Methods 0.000 abstract description 4
- 239000007788 liquid Substances 0.000 abstract 2
- 230000005641 tunneling Effects 0.000 abstract 2
- 229920000915 polyvinyl chloride Polymers 0.000 description 28
- 239000004800 polyvinyl chloride Substances 0.000 description 28
- 239000002689 soil Substances 0.000 description 11
- 238000010276 construction Methods 0.000 description 9
- 238000000034 method Methods 0.000 description 8
- 238000005516 engineering process Methods 0.000 description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
- 230000008569 process Effects 0.000 description 4
- 229910052799 carbon Inorganic materials 0.000 description 3
- 238000001816 cooling Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000006641 stabilisation Effects 0.000 description 2
- 238000011105 stabilization Methods 0.000 description 2
- 238000005728 strengthening Methods 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 230000008901 benefit Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000012634 fragment Substances 0.000 description 1
- 238000013467 fragmentation Methods 0.000 description 1
- 238000006062 fragmentation reaction Methods 0.000 description 1
- 230000002631 hypothermal effect Effects 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 239000012266 salt solution Substances 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
Images
Landscapes
- Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
- Excavating Of Shafts Or Tunnels (AREA)
Abstract
A shield tunnel freezing-consolidation PVC freezing pipe is applied to a freezing-consolidation area, a shield tunneling machine penetrates the freezing-consolidation area along the axis, and the PVC freezing pipe comprises a pipe body. The pipe body is made from PVC, the bottom end of the pipe body is closed by a PVC pipe choke plug, and a flange assembly is arranged at the other end and provides a steel flange plate on the outer side and a PVC flange plate on the inner side. The steel flange plate and the PVC flange plate are connected, and a liquid inlet pipe penetrates the flange assembly and extends into the pipe body. A liquid outlet pipe is further arranged on the pipe body. Therefore, the shield tunnel freezing-consolidation PVC freezing pipe is simple in structure and convenient to operate and meets the engineering strength and deformation requirements in the shield tunnel brine freezing design. In addition, the freezing pipe is not required to be pulled out after freezing is finished and can be directly cut during shield tunneling, and the shield tunnel safety is improved.
Description
Technical field
The utility model relates to the freezing technology field in shield structure turnover hole, relates 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 utility model 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.
Utility model content
The technical problems to be solved in the utility model 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 utility model 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 utility model 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 utility model can obtain by explanation described later and institute's accompanying drawing.
Accompanying drawing explanation
Fig. 1 is the application schematic diagram of the utility model shield structure turnover hole consolidation by freezing PVC freezing pipe;
Fig. 2 is the structural representation of the utility model shield structure turnover hole consolidation by freezing PVC freezing pipe the first embodiment;
Fig. 3 is the internal construction schematic diagram of Fig. 2;
Fig. 4 is the structural representation of the utility model the second embodiment.
The specific embodiment
Below in conjunction with drawings and Examples, the specific embodiment of the present utility model is further described, following examples are only for the technical solution of the utility model is more clearly described, and can not limit protection domain of the present utility model with this.
As shown in Figure 1, the concrete technical scheme of implementing of the utility model 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 utility model 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 utility model has the advantage of:
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 utility model; should be understood that; for those skilled in the art; do not departing under the prerequisite of the utility model know-why; can also make some improvements and modifications, these improvements and modifications also should be considered as protection domain of the present utility model.
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 |
|---|---|---|---|
| CN201320764868.XU CN203547756U (en) | 2013-11-28 | 2013-11-28 | Shield tunnel freezing-consolidation PVC freezing pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320764868.XU CN203547756U (en) | 2013-11-28 | 2013-11-28 | Shield tunnel freezing-consolidation PVC freezing pipe |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203547756U true CN203547756U (en) | 2014-04-16 |
Family
ID=50465885
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320764868.XU Expired - Lifetime CN203547756U (en) | 2013-11-28 | 2013-11-28 | Shield tunnel freezing-consolidation PVC freezing pipe |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203547756U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103590835A (en) * | 2013-11-28 | 2014-02-19 | 北京中煤矿山工程有限公司 | PVC freezing pipe for shield tunneling freeze-consolidation |
| CN108612949A (en) * | 2018-05-13 | 2018-10-02 | 英立（江苏）机电有限公司 | A kind of pvc pipe being easily installed with dismounting |
-
2013
- 2013-11-28 CN CN201320764868.XU patent/CN203547756U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103590835A (en) * | 2013-11-28 | 2014-02-19 | 北京中煤矿山工程有限公司 | PVC freezing pipe for shield tunneling freeze-consolidation |
| CN108612949A (en) * | 2018-05-13 | 2018-10-02 | 英立（江苏）机电有限公司 | A kind of pvc pipe being easily installed with dismounting |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140416 |