CN100489361C - Method for reducing prop force with ring-shape mud sheath in pipe-jacking construction - Google Patents
Method for reducing prop force with ring-shape mud sheath in pipe-jacking construction Download PDFInfo
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- CN100489361C CN100489361C CNB2005101104263A CN200510110426A CN100489361C CN 100489361 C CN100489361 C CN 100489361C CN B2005101104263 A CNB2005101104263 A CN B2005101104263A CN 200510110426 A CN200510110426 A CN 200510110426A CN 100489361 C CN100489361 C CN 100489361C
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Abstract
The present invention relates to a method for reducing jacking force by using ring slurry guard cover in pipe-jacking construction of building engineering technology field. Said method includes the following several procedures: (1), reinforced concrete pipe-jacking machine utilization procedure; (2), gap utilization procedure; (3), using slurry-pressing equipment to feed the bentonite slurry into slurry-pressing hole; and (4) making the bentonite slurry be diffused into earth body. Said invention also provides the concrete steps of the above-mentioned every procedure.
Description
Technical field
The present invention relates to a kind of method of construction engineering technical field, specifically is the method that reduces top power in a kind of jacking construction with ring-shape mud sheath.
Background technique
Jacking construction has been widely used in the construction of under ground pipings such as municipal wastewater pipe at present.In the jacking construction, the size of jacking power directly influences jacking efficient.When reducing the pipeline jacking and the surface friction drag between the soil body, the diameter of follow-up tube coupling is than the little 10mm of diameter of push-bench.Like this, between the tube coupling and the soil body, formed the gap of 10mm, during jacking, inject bentonitic drag reduction mud by the reserving hole channel on the tube coupling to pipeline outer wall, form a shape mud sheath in that pipeline is peripheral, reduced the frictional resistance between the tube coupling outer wall and the soil body, thus the top power when reducing jacking.The quality that shape mud sheath forms directly has influence on the effect of drag reduction.Most widely used in the pipe-jacking project is bentonite slurry.Bentonite clay becomes suspension after adding the water stirring, when suspension is static, can form gelatin.Bentonite slurry has thixotropy, and this helps the jacking pipeline to become anti-friction agent when the ground interlayer moves, and reduces frictional resistance with viscous liquid; When static, become gelatin and support the stratum.Therefore, a key measure in the jacking construction is evenly to be pressed into bentonite slurry in the annular space between jacking tube coupling and surrounding soil, forms stable shape mud sheath.
Through existing technical paper retrieval is found, Chinese patent application CN99240224.7, denomination of invention: a kind of device that is used for surface friction drag between jacking construction minimizing tube wall and the soil layer, publication number: CN2413120, this patent readme is: a kind of device that is used for surface friction drag between jacking construction minimizing tube wall and the soil layer, in existing pipe jacking equipment, set up a cover auxiliary hydraulic pressure equipment.Transport pipe a section from the oil pump outlet end to the single-unit tube inlet is a flexible pipe; Top at each single-unit inner tube wall, along the oil transportation house steward is set on its length direction, at the middle part of each single-unit inner tube wall the annular oil transportation that is connected with the oil transportation house steward being set is in charge of, the annular oil transportation is in charge of and is provided with several spray bars, is provided with circular hole with the spray bar corresponding section on the tube wall of each single-unit pipe.Concrete grammar is: during the push pipe jacking, bentonite slurry enters the oil transportation house steward under pressure fuel pump, when bentonite slurry saves the middle part of inwall through single tube, entering the annular oil transportation that is connected with the oil transportation house steward is in charge of, be in charge of the spray bar that is provided with and the circular hole on the tube wall by annular oil transportation and enter space between tube coupling and the surrounding soil, be full of slurries around making pipeline, form shape mud sheath.Though this patent has proposed a method that reduces frictional resistance between tube wall and the soil layer, bentonite slurry extrudes by the mud jacking hole that is arranged on the tube wall of single tube joint middle part, forms the point-like mud jacking.The mud that adopts this mode to extrude often is concentrated near the mud jacking hole, in the space around can not being evenly distributed in.Therefore, can not form stabilizing effective shape mud sheath.In actual engineering, drag-reduction effect is not very good.
Summary of the invention
The present invention is directed to above-mentioned the deficiencies in the prior art, propose to reduce with ring-shape mud sheath in a kind of jacking construction the method for top power.This method has changed the way that mud jacking hole in the past is located at the tube coupling middle part, and it is located at the circumferential weld position, the rubber seal outside of tube coupling female end, thereby make the outlet of point-like slurries outlet having become ring-type slurries, help forming effective ring-shape mud sheath so greatly.
The present invention is achieved by the following technical solutions, may further comprise the steps:
1) utilizes the reinforced concrete push-bench.The push pipe tube coupling adopts reinforced concrete tongue and groove pipe, places liner material and rubber seal between female end that it is inboard and the socket end; There is the annular space of 20mm in the outside of female end and socket end.
2) utilize above-mentioned gap, enter the mouth near layout tube coupling mud jacking hole on the inwall of female end at reinforced concrete tongue and groove pipe, at rubber seal outside circumferential weld location arrangements mud jacking hole exits.Specifically be to arrange 4 mud jacking holes equably, be 90 ° of hoop intercross arrangement at reinforced concrete tongue and groove pipe afterbody hoop.Embedded steel tube is adopted in the mud jacking hole, and side has thread within it, so that the mud jacking flexible pipe is attached thereto, and the time spent can not used the plug shutoff.
When 3) the jacking machine advances, by existing mud jacking equipment bentonite slurry is delivered to the mud jacking hole, by the outside mud jacking in mud jacking hole.
4) bentonite slurry enters into the annular space of tube coupling female end and socket end by the mud jacking hole inlet of inwall, mud is after being full of the annular space, in the soil body, spread, point-like slurries outlet having become ring-type slurries outlet like this, form effective ring-shape mud sheath, improve squeezing quality, can obtain good drag-reduction effect.
The present invention is by being pressed into bentonite slurry in the circumferential weld space between reinforced concrete tube coupling and surrounding soil, space when filling jacking construction between pipeline and the surrounding soil, be full of mud equably in the whole pipe periphery, form stable ring-type bentonite slurry sheath, reduced the frictional resistance between the tube coupling outer wall and the soil body, thus the top power when effectively reducing jacking.
The present invention is simple and reliable, and is economical and practical, is applied in the jacking construction of under ground pipings such as municipal wastewater pipe.Through the engineering practice checking, obtained significant effect.
Description of drawings
Fig. 1 arranges sectional drawing for mud jacking of the present invention hole
Fig. 2 arranges sectional view for mud jacking of the present invention hole
Embodiment
Provide following examples in conjunction with technological scheme of the present invention:
Embodiment:
As shown in Figure 1 and Figure 2, case history is the sewage pipe pipe-jacking project in the Shanghai City combined sewage improvement engineering.Engineering adopts the reinforced concrete tongue and groove pipe of Φ 1650mm, external diameter φ 2030mm, and wall thickness 190mm, every joint effective length is 2000mm, total length 2135mm.To new crossing, east, recovery West Road, total length 231.5m divides two top journeys to the engineering section from No. 12 wells at crossing, Zhongshan North Road Langao.
The point-like mud jacking method construction that the first top Cheng Caiyong is traditional; The construction of second top Cheng Caiyong ring-type mud jacking of the present invention method.
The first top journey, owing to adopt the construction of point-like mud jacking method, mud jacking work is undesirable, top power rises very fast during jacking, after jacking 22 joints, during jacking length 45m place, strengthen the mud jacking measure, and take the ftercompction slurry, and top power is descended to some extent, top power has reached 3040kN in 100m.And the change in resistance when respectively saving jacking is bigger.
The second top journey is improved mud jacking technology, adopts the construction of ring-type mud jacking method.Concrete construction sequence is as follows:
1) reinforced concrete tongue and groove tubular type push pipe tube coupling has liner material and rubber seal between female end that it is inboard and the socket end; The outer survey of female end and socket end has the annular space of 20mm, as shown in Figure 1.
2) enter the mouth near layout tube coupling mud jacking hole on the inwall of female end at reinforced concrete tongue and groove pipe, at rubber seal outside circumferential weld location arrangements mud jacking hole exits.Have 4 mud jacking holes, the position is separately positioned on 45 °, 135 °, 225 °, 315 ° and locates, and is 90 ° of hoop intercross arrangement.
The embedded steel tube of φ 20 * 3 is adopted in the mud jacking hole, and its inboard has thread, so that the mud jacking flexible pipe is attached thereto, and the time spent can not used the plug shutoff.
When 3) the jacking machine advances, by existing mud jacking equipment bentonite slurry is delivered to the mud jacking hole, by mud jacking hole mud jacking, as shown in Figure 1.
4) bentonite slurry enters into the circumferential weld space of tube coupling female end and socket end by the mud entrance of inwall, mud spreads in the soil body after being full of the circumferential weld space, point-like slurries outlet having become ring-type slurries outlet like this, form effective ring-shape mud sheath, improve squeezing quality.
In the whole jack-in process, top power is not along with jacking has obvious variation apart from increase, and the measure of ftercompction slurry is not adopted in omnidistance jacking.The top power of this top journey in 100m only is 1226kN, reduces 60% than traditional point-like mud jacking method construction.The mud drag-reduction effect of ring-type mud jacking method construction is very remarkable.
Claims (4)
1, reduce the method for top power in a kind of jacking construction with ring-shape mud sheath, it is characterized in that, may further comprise the steps:
1) utilize the reinforced concrete push-bench, the push pipe tube coupling adopts reinforced concrete tongue and groove pipe, places liner material and rubber seal between female end that it is inboard and the socket end; There is the annular space in the outside of female end and socket end;
2) utilize above-mentioned gap, enter the mouth near layout tube coupling mud jacking hole on the inwall of female end at reinforced concrete tongue and groove pipe, at rubber seal outside circumferential weld location arrangements mud jacking hole exits;
When 3) the jacking machine advances, by mud jacking equipment bentonite slurry is delivered to the mud jacking hole, by the outside mud jacking in mud jacking hole;
4) the mud jacking hole inlet of bentonite slurry by inwall enters into the annular space of tube coupling female end and socket end, and mud forms the ring-type slurries through the mud jacking hole exits and exports after being full of the annular space, spreads in the soil body, forms effective ring-shape mud sheath.
2, reduce the method for top power in the jacking construction according to claim 1 with ring-shape mud sheath, it is characterized in that, described annular space is 20mm.
3, reduce the method for top power in the jacking construction according to claim 1 with ring-shape mud sheath, it is characterized in that step 2) in, arrange 4 mud jacking holes equably at reinforced concrete tongue and groove pipe afterbody hoop, be 90 ° of hoop intercross arrangement.
4, according to the method that reduces top power in claim 1 or the 3 described jacking constructions with ring-shape mud sheath, it is characterized in that step 2) in, embedded steel tube is adopted in the mud jacking hole, side has thread within it, be convenient to the mud jacking flexible pipe and be attached thereto, and the time spent is not used the plug shutoff.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005101104263A CN100489361C (en) | 2005-11-17 | 2005-11-17 | Method for reducing prop force with ring-shape mud sheath in pipe-jacking construction |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005101104263A CN100489361C (en) | 2005-11-17 | 2005-11-17 | Method for reducing prop force with ring-shape mud sheath in pipe-jacking construction |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1773151A CN1773151A (en) | 2006-05-17 |
| CN100489361C true CN100489361C (en) | 2009-05-20 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNB2005101104263A Expired - Fee Related CN100489361C (en) | 2005-11-17 | 2005-11-17 | Method for reducing prop force with ring-shape mud sheath in pipe-jacking construction |
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Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102537516A (en) * | 2010-12-13 | 2012-07-04 | 上海市基础工程有限公司 | Sandy soil pipe jacking anti-drag mud sleeve forming device |
| CN102359659B (en) * | 2011-08-09 | 2013-11-13 | 上海交通大学 | Method for optimizing pipeline design in construction of reinforced concrete jacking pipe |
| CN102359672B (en) * | 2011-09-28 | 2013-05-29 | 无锡华毅管道有限公司 | Prestressed steel cylinder concrete push pipe |
| CN103133766A (en) * | 2011-11-29 | 2013-06-05 | 上海市基础工程有限公司 | Over-length heavy caliber steel jacking pipe mud resistance reducing system |
| CN105422984A (en) * | 2015-08-27 | 2016-03-23 | 中国十七冶集团有限公司 | Method for preventing joint of jacking pipes from being broken |
| CN108548010A (en) * | 2018-06-29 | 2018-09-18 | 成都金玉雄辉建筑工程有限公司 | Improve security performance push-bench |
| CN110645410A (en) * | 2019-09-03 | 2020-01-03 | 上海市基础工程集团有限公司 | Auxiliary forming device for anti-drag slurry sleeve in pipe jacking construction of sand layer |
| CN111914373B (en) * | 2020-08-21 | 2023-11-21 | 重庆大学 | Long-distance rock jacking pipe friction resistance calculation method and pipe-rock contact state detection method |
| CN114893219B (en) * | 2022-05-26 | 2023-03-10 | 中山大学 | Pipe joint assembly, pipe curtain and box culvert replacement pipe curtain construction method |
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2005
- 2005-11-17 CN CNB2005101104263A patent/CN100489361C/en not_active Expired - Fee Related
Non-Patent Citations (2)
| Title |
|---|
| 地下顶管工程中组合密封中继环的新设计. 王承德.建筑施工，第19卷. 1997 |
| 地下顶管工程中组合密封中继环的新设计. 王承德.建筑施工，第19卷. 1997 * |
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Granted publication date: 20090520 Termination date: 20111117 |