CN204626432U - A kind of vacuum drop water hole being applicable to drift sand formation tunnel - Google Patents
A kind of vacuum drop water hole being applicable to drift sand formation tunnel Download PDFInfo
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- CN204626432U CN204626432U CN201520167060.2U CN201520167060U CN204626432U CN 204626432 U CN204626432 U CN 204626432U CN 201520167060 U CN201520167060 U CN 201520167060U CN 204626432 U CN204626432 U CN 204626432U
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- downcomer
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- sand formation
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Abstract
The utility model belongs to by reducing low water level technical field, specifically a kind of vacuum drop water hole being applicable to drift sand formation tunnel.Solve in the construction of drift sand formation tunnel vacuum-dewatering and easily occur this phenomenon of collapse hole, downcomer is difficult to enter precipitation hole smoothly, or to the geotextiles well damage of downcomer outer wrapping, thus do not reach the problem of good dewatering effect, a kind of vacuum drop water hole being applicable to drift sand formation tunnel, comprise precipitation hole, downcomer assembly is provided with in precipitation hole, described downcomer assembly comprises some downcomers, be welded to connect by union between adjacent downcomer, the inner end of downcomer assembly is provided with closed tube head, tube head welded top has cross head, downcomer pipe shaft is drilled with aperture, aperture is quincuncial arrangement, wherein downcomer assembly the inner and Dou You imperforate section, outer end, often save outside downcomer and be enclosed with geotextiles, filter screen is tied with outside geotextiles, filter screen is by tied silk tighten.
Description
Technical field
The utility model belongs to by reducing low water level technical field, specifically a kind of vacuum drop water hole being applicable to drift sand formation tunnel.
Background technology
With regard to current tunnel excavation, in drift sand stratum, tunneling has become an international difficult problem undoubtedly, and wherein construction technology often takes a step forward and all will face great challenge, is equally also great breakthrough.
Generally, in the face of drift sand water burst tunnel, usual way is vacuum-dewatering, but how to accomplish that precipitation has just become the key issue of whole work progress fast and effectively, and particularly the problem of vacuum drop water hole pore-forming difficulty seriously governs the progress of precipitation and construction.Therefore how to solve collapse hole and just become the problem that current urgent need solves.
Summary of the invention
The utility model easily occurs this phenomenon of collapse hole to solve in the construction of drift sand formation tunnel vacuum-dewatering, downcomer is difficult to enter precipitation hole smoothly, or to the geotextiles well damage of downcomer outer wrapping, thus do not reach the problem of good dewatering effect, a kind of vacuum drop water hole being applicable to drift sand formation tunnel is provided.
The utility model takes following technical scheme: a kind of vacuum drop water hole being applicable to drift sand formation tunnel, comprise precipitation hole, downcomer assembly is provided with in precipitation hole, described downcomer assembly comprises some downcomers, be welded to connect by union between adjacent downcomer, the inner end of downcomer assembly is provided with closed tube head, tube head welded top has cross head, downcomer pipe shaft is drilled with aperture, aperture is quincuncial arrangement, wherein downcomer assembly the inner and Dou You imperforate section, outer end, often save outside downcomer and be enclosed with geotextiles, filter screen is tied with outside geotextiles, filter screen is by tied silk tighten.
Precipitation pipe range 12m, is wrapped up by the long steel pipe segmentation of the φ 50mm often saving 1.5m and is made of welded connection.
The diameter of downcomer pipe shaft aperture is 8mm, aperture pitch 10cm.
Downcomer is φ 50mm steel pipe or φ 40mm steel pipe, and φ 50mm precipitation steel pipe adopts 40 steel pipes to adopt 25 steel pipes as every pipe joint as every pipe joint, φ 40mm precipitation steel pipe, is welded to connect.
Specific construction step is as follows:
1) hole: utilize XY-2 geological drilling rig (drilling rod is φ 73mm sleeve pipe) to hole.
2) downcomer processing: the long 12m of the every root of downcomer, is wrapped up by the long steel pipe segmentation of the φ 50mm often saving 1.5m and is made of welded connection.Pipe shaft bores 8mm aperture, and pitch of holes 10cm quincuncial arrangement, pipe end 2 m and tube head 0.5m section do not establish precipitation to hole.Adopt geotextiles to wrap up after every pipe joint boring two-layer, twine 100 mesh filter screen one decks outward, after having twined, adopt tied silk tighten at interval of 20cm.φ 50mm precipitation steel pipe adopts 40 steel pipes to adopt 25 steel pipes as every pipe joint as every pipe joint, φ 40mm precipitation steel pipe, is welded to connect.
3) downcomer is installed: boring adopts water drilling pore-forming, exits after boring.Downcomer with special construction tube head is docked (can spot welding) with sleeve pipe, then start to send pipe, often next joint downcomer follow-up casing joint, downcomer joint is soldered, send pipe to put in place backed off after random sleeve pipe.
Compared with prior art, the utility model can prevent the phenomenon of drift sand formation tunnel vacuum-dewatering collapse hole, accelerates construction speed, has saved cost, has structure simple simultaneously, workable, the advantages such as easy processing.
Accompanying drawing explanation
Fig. 1 is downcomer structural representation;
1-downcomer in figure, 2-tube head, 3-aperture.
Detailed description of the invention
As shown in Figure 1, a kind of vacuum drop water hole being applicable to drift sand formation tunnel, comprise precipitation hole, downcomer assembly is provided with in precipitation hole, described downcomer assembly comprises some downcomers 1, be welded to connect by union between adjacent downcomer 1, the inner end of downcomer assembly is provided with closed tube head 2, tube head 2 welded top has cross head, downcomer 1 pipe shaft is drilled with aperture 3, aperture 3 is in quincuncial arrangement, wherein downcomer assembly the inner and Dou You imperforate section, outer end, often save outside downcomer 1 and be enclosed with geotextiles, filter screen is tied with outside geotextiles, filter screen is by tied silk tighten.
The long 12m of downcomer 1, is wrapped up by the long steel pipe segmentation of the φ 50mm often saving 1.5m and is made of welded connection.
The diameter of downcomer 1 pipe shaft aperture is 8mm, aperture pitch 10cm.
Downcomer 1 is φ 50mm steel pipe or φ 40mm steel pipe, and φ 50mm precipitation steel pipe adopts 40 steel pipes to adopt 25 steel pipes as every pipe joint as every pipe joint, φ 40mm precipitation steel pipe, is welded to connect.
Concrete construction method is as follows:
1) hole: utilize XY-2 geological drilling rig (drilling rod is φ 73mm sleeve pipe) to hole.
2) downcomer processing: the long 12m of the every root of downcomer, is wrapped up by the long steel pipe segmentation of the φ 50mm often saving 1.5m and is made of welded connection.Pipe shaft bores 8mm aperture, and pitch of holes 10cm quincuncial arrangement, pipe end 2 m and tube head 0.5m section do not establish precipitation to hole.Adopt geotextiles to wrap up after every pipe joint boring two-layer, twine 100 mesh filter screen one decks outward, after having twined, adopt tied silk tighten at interval of 20cm.φ 50mm precipitation steel pipe adopts 40 steel pipes to adopt 25 steel pipes as every pipe joint as every pipe joint, φ 40mm precipitation steel pipe, is welded to connect.
3) downcomer is installed: boring adopts water drilling pore-forming, exits after boring.Downcomer with special construction tube head is docked (can spot welding) with sleeve pipe, then start to send pipe, often next joint downcomer follow-up casing joint, downcomer joint is soldered, send pipe to put in place backed off after random sleeve pipe.
Claims (4)
1. one kind is applicable to the vacuum drop water hole of drift sand formation tunnel, comprise precipitation hole, it is characterized in that: in precipitation hole, be provided with downcomer assembly, described downcomer assembly comprises some downcomers (1), adjacent downcomer is welded to connect by union between (1), the inner end of downcomer assembly is provided with closed tube head (2), tube head (2) welded top has cross head, downcomer (1) pipe shaft is drilled with aperture (3), aperture (3) is in quincuncial arrangement, wherein downcomer assembly the inner and Dou You imperforate section, outer end, often save downcomer (1) outside and be enclosed with geotextiles, filter screen is tied with outside geotextiles, filter screen is by tied silk tighten.
2. the vacuum drop water hole being applicable to drift sand formation tunnel according to claim 1, is characterized in that: downcomer (1) long 12m, is wrapped up be made of welded connection by the long steel pipe segmentation of the φ 50mm often saving 1.5m.
3. the vacuum drop water hole being applicable to drift sand formation tunnel according to claim 2, is characterized in that: the diameter of downcomer (1) pipe shaft aperture is 8mm, aperture pitch 10cm.
4. the vacuum drop water hole being applicable to drift sand formation tunnel according to claim 3, it is characterized in that: downcomer (1) is φ 50mm steel pipe or φ 40mm steel pipe, φ 50mm precipitation steel pipe adopts 40 steel pipes to adopt 25 steel pipes as every pipe joint as every pipe joint, φ 40mm precipitation steel pipe, is welded to connect.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520167060.2U CN204626432U (en) | 2015-03-24 | 2015-03-24 | A kind of vacuum drop water hole being applicable to drift sand formation tunnel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520167060.2U CN204626432U (en) | 2015-03-24 | 2015-03-24 | A kind of vacuum drop water hole being applicable to drift sand formation tunnel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204626432U true CN204626432U (en) | 2015-09-09 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201520167060.2U Active CN204626432U (en) | 2015-03-24 | 2015-03-24 | A kind of vacuum drop water hole being applicable to drift sand formation tunnel |
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| CN (1) | CN204626432U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106049414A (en) * | 2016-08-03 | 2016-10-26 | 长江勘测规划设计研究有限责任公司 | Lap joint combined type hole interior protection device and method for deep drainage hole of deep and thick layer slip mass |
| CN109812223A (en) * | 2019-03-25 | 2019-05-28 | 五冶集团上海有限公司 | It is a kind of suitable for silt, the hole punched device of flour sand soil property and application method |
| CN112942396A (en) * | 2021-03-11 | 2021-06-11 | 中建七局交通建设有限公司 | Dewatering equipment suitable for quicksand stratum and using method thereof |
-
2015
- 2015-03-24 CN CN201520167060.2U patent/CN204626432U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106049414A (en) * | 2016-08-03 | 2016-10-26 | 长江勘测规划设计研究有限责任公司 | Lap joint combined type hole interior protection device and method for deep drainage hole of deep and thick layer slip mass |
| CN109812223A (en) * | 2019-03-25 | 2019-05-28 | 五冶集团上海有限公司 | It is a kind of suitable for silt, the hole punched device of flour sand soil property and application method |
| CN112942396A (en) * | 2021-03-11 | 2021-06-11 | 中建七局交通建设有限公司 | Dewatering equipment suitable for quicksand stratum and using method thereof |
| CN112942396B (en) * | 2021-03-11 | 2022-03-15 | 中建七局交通建设有限公司 | Dewatering equipment suitable for quicksand stratum and using method thereof |
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