CN201317936Y - Drainage structure for vacuum preloading ground treatment in sand drain method - Google Patents
Drainage structure for vacuum preloading ground treatment in sand drain method Download PDFInfo
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- CN201317936Y CN201317936Y CNU2008201438386U CN200820143838U CN201317936Y CN 201317936 Y CN201317936 Y CN 201317936Y CN U2008201438386 U CNU2008201438386 U CN U2008201438386U CN 200820143838 U CN200820143838 U CN 200820143838U CN 201317936 Y CN201317936 Y CN 201317936Y
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- sand
- furrow
- drainage
- vacuum preloading
- plastic
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Abstract
The utility model provides a drainage structure for vacuum preloading ground treatment in a sand drain method; the drainage structure comprises a drainage system and a sealed vacuum pumping system, wherein the drainage system comprises a plastic drainage plate embedded in the soil body, a sand drain is arranged in parallel with the plastic drainage plate in the soil body of a drainage plate head along the upper part of the plastic drainage plate, the drainage plate head of the plastic drainage plate is directly connected with a filter tube, and the filter tube is embedded in the sand drain. The cross section of the sand drain is ladder-shaped, rectangular, U-shaped or one of combined shapes of the ladder, the rectangle and the U shape; and sand in the sand drain includes fine sand, medium sand, coarse sand, gravel sand and one of mixed sand of the fine sand, the medium sand, the coarse sand and the gravel sand. The utility model has the beneficial effects that the drainage structure reduces the linear loss of the vacuity transmission and increases the horizontal vacuum preloading drainage channels at the same time, and has the advantages of low manufacturing cost, less limit of sand sources by the medium sand and the coarse sand and short construction period compared with the vacuum preloading method of the traditional structure.
Description
Technical field
The utility model relates to the foundation treatment technology in civil engineering work field, the discharge structure handled of sand furrow method vacuum preloading ground particularly, be applicable to that mud and mucky soil adopt the pre-pressure drainage consolidation method construction field, particularly great to the regional application value that lacks the medium coarse sand resource.
Background technology
Traditional vacuum method is since 20th century, the later stage eighties was by successful Application, and a large amount of engineering practices prove reinforcing soft soil, as the effective ways of mud and mucky soil, remain the main foundation treatment technology of soft foundation so far.The horizontal drainage of vacuum method and vacuum transmission system are made up of sand cushion and chimney filter, and at present because medium coarse sand resource scarcity, price are higher, therefore cost and the duration influence to vacuum method is bigger.
Summary of the invention
The purpose of this utility model provides the discharge structure that a kind of sand furrow method vacuum preloading ground is handled, engineering characteristic in conjunction with soft clay area, adopt sand furrow structure for vacuum preloading ground to handle, horizontal drainage and vacuum transfer route to vacuum method are optimized, the gas clean-up transmission efficiency, be beneficial to reduce to the requirement of medium coarse sand, reduced the consumption of medium coarse sand, obtain the purpose that shortens the duration of a project and reduce construction costs as horizontal drainage.
For achieving the above object, the technical solution adopted in the utility model provides a kind of discharge structure of sand furrow method vacuum preloading ground, this structure includes drainage system and sealing pumped vacuum systems, drainage system includes the plastic draining board of imbedding in the soil body, wherein: along being provided with sand furrow abreast with plastic draining board in the soil body of plastic draining board top draining wrench, the draining wrench of plastic draining board directly connects chimney filter, and described chimney filter is embedded in the described sand furrow.
The section configuration of described sand furrow is one of combination shape of trapezoidal, rectangle, U-shaped and trapezoidal, rectangle, U-shaped shape.
Sand in the described sand furrow is one of mixed sand of fine sand, medium sand, coarse sand, gravelly sand and fine sand, medium sand, coarse sand, gravelly sand.
Described sand furrow is set to along a row or per two plastic removal material band drains sand furrow that is arranged in parallel.
Effect of the present utility model has been this structure decrease linear loss of vacuum transmission, the sand furrow structure has increased the horizontal drainage passage of vacuum preloading simultaneously, compare with the traditional vacuum preloading that to have cost low, be subjected to the restriction of medium coarse sand sand source few, the advantage that the construction period is short.
Description of drawings
Fig. 1 is a vacuum method discharge structure sectional schematic diagram of the present utility model;
Fig. 2 is band drain of the present utility model and chimney filter connection diagram.
Among the figure:
1, plastic draining board 2, chimney filter 3 sand furrows
The specific embodiment
Further specify below in conjunction with the utilization of accompanying drawing the discharge structure of sand furrow method vacuum preloading ground processing of the present utility model.
As shown in Figure 1, 2, the discharge structure that sand furrow method vacuum preloading ground of the present utility model is handled: this structure includes drainage system and sealing pumped vacuum systems, drainage system includes the plastic draining board of imbedding in the soil body 1, along being provided with sand furrow 3 abreast with plastic draining board in the soil body of plastic draining board top draining wrench, the draining wrench of plastic draining board directly connects chimney filter 2, and described chimney filter 2 is embedded in the described sand furrow 3.
The section configuration of described sand furrow 3 is one of combination shape of trapezoidal, rectangle, U-shaped and trapezoidal, rectangle, U-shaped shape.Described sand furrow 3 is set to along a row or per two plastic removal material band drains sand furrow that is arranged in parallel.
Sand in the described sand furrow 3 is one of mixed sand of fine sand, medium sand, coarse sand, gravelly sand and fine sand, medium sand, coarse sand, gravelly sand.
The discharge structure that sand furrow method vacuum preloading ground of the present utility model is handled is achieved in that this structure comprises drainage system and sealing pumped vacuum systems, and drainage system comprises chimney drain and horizontal drainage system again.
1. chimney drain
What this drainage system mainly adopted is plastic draining board 1, should select for use according to different construction depths, soil layer condition the main performance index such as central layer thickness, filter membrane intensity, complex tensile strength and vertical water-flowing amount of plastic draining board 1.Plastic draining board 1 not only has drainage, and is the main transmission channels of vacuum, and the vacuum load applies by it.
Vacuum method adopts the structure of sand furrow 3, the draining wrench of plastic draining board 1 is not directly to imbed in the sand cushion, but be embedded in the chimney filter in the sand furrow 3 or directly join by hose and arm, the water in the soil body directly enters chimney filter 2 by band drain 1, has reduced drainage distance; Vacuum directly enters band drain 1 by chimney filter, has shortened the path of vacuum transmission, thereby has improved the transmission efficiency of vacuum.
2. horizontal drainage system
Sand cushion mainly plays horizontal drainage and transmits vacuum in conventional vacuum preloading, and laying depth is 40～50cm, and clay content requires less than 3% in the sand cushion, and dry density is greater than 1.5t/m
3, transmission coefficient is greater than 1*10
-2Cm/s.Also to keep the even of sand cushion thickness during laying, fully cover chimney filter 2, make vertical drain and chimney filter 2 be coupled to an integral body, can form a unobstructed drainage system and vacuum pressure transmission system by sand cushion.
Vacuum method adopts the structure of sand furrow 3, and the effect of medium coarse sand is weakened greatly, no longer has been the key link of transmitting vacuum and horizontal drainage, and has only played the construction cushion coat effect.Can greatly reduce its quality requirement, can suit measures to local conditions to make course and all can according to material source employing fine sand, flour sand or silt, the plain fill etc. of locality.
The sand furrow structure of vacuum method, its construction technology is simple, and is easy to operate, has promotion and application and is worth.
3. band drain and chimney filter is connected
Common vacuum preloading band drain wrench directly is embedded in the sand cushion of horizontal drainage, and the structure of vacuum method sand furrow 3 is that the band drain wrench is directly linked to each other with chimney filter in the sand furrow, or links to each other with chimney filter by the arm of flexible pipe.Connected mode comprises modes such as parcel, butt joint, winding.
4. the layout of jet pump and chimney filter
Common vacuum preloading chimney filter is arranged in the sand cushion of horizontal drainage, and chimney filter is arranged negligible amounts.Sand furrow structure for vacuum preloading chimney filter is arranged in the sand furrow, general each row's band drain 1 layout or per two row's band drains 1 are arranged vertical sand furrow 3 of a parcel chimney filter, with horizontal chimney filter vertical chimney filter is connected into a net again, thereby form the netted discharge structure of a horizontal drainage, jet pump is arranged in the border of ground processing region, directly links to each other with chimney filter 2.
5. sealing vacuumizes
It is the same with traditional vacuum preloading that the sealing structure of vacuum method sand furrow 3 vacuumizes, and adopts 3 layers of diaphragm seal to seal, and ground is handled the border and adopted the sealing ditch to carry out, and has the zone of pervious layer need block pervious layer.
Therefore, the construction sequence of sand furrow structure for vacuum preloading is: 1. smooth place; 2. set plastic draining board; 3. excavate sand furrow; 4. lay chimney filter; 5. chimney filter is connected with band drain and puts into sand furrow; 6. with sand sand furrow is filled and led up, made chimney filter be full of the sand material on every side; 7. connect vacuum pump, shop film, bleed; 8. reach the requirement unloading.
Claims (4)
1, a kind of discharge structure of sand furrow method vacuum preloading ground processing, this structure includes drainage system and sealing pumped vacuum systems, drainage system includes the plastic draining board of imbedding in the soil body, chimney filter and horizontally disposed sand furrow, it is characterized in that: along being provided with sand furrow abreast with plastic draining board in the soil body of plastic draining board top draining wrench, the draining wrench of plastic draining board directly connects chimney filter, and described chimney filter is embedded in the described sand furrow.
2, the discharge structure of handling according to the described sand furrow method vacuum preloading ground of claims 1 is characterized in that: the section configuration of described sand furrow is one of combination shape of trapezoidal, rectangle, U-shaped and trapezoidal, rectangle, U-shaped shape.
3, according to the discharge structure of claims 1 or 2 described sand furrow method vacuum preloading grounds processing, it is characterized in that: the sand in the described sand furrow is one of mixed sand of fine sand, medium sand, coarse sand, gravelly sand and fine sand, medium sand, coarse sand, gravelly sand.
4, the discharge structure of handling according to the described sand furrow method vacuum preloading ground of claims 1 is characterized in that: described sand furrow is set to along a row or the per two plastic removal material band drains sand furrow that is arranged in parallel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201438386U CN201317936Y (en) | 2008-12-04 | 2008-12-04 | Drainage structure for vacuum preloading ground treatment in sand drain method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201438386U CN201317936Y (en) | 2008-12-04 | 2008-12-04 | Drainage structure for vacuum preloading ground treatment in sand drain method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201317936Y true CN201317936Y (en) | 2009-09-30 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008201438386U Expired - Lifetime CN201317936Y (en) | 2008-12-04 | 2008-12-04 | Drainage structure for vacuum preloading ground treatment in sand drain method |
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| Country | Link |
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| CN (1) | CN201317936Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103243704A (en) * | 2013-05-02 | 2013-08-14 | 浙江大学舟山海洋研究中心 | Shallow mud foundation treatment method |
| CN103410138A (en) * | 2013-06-09 | 2013-11-27 | 浙江省围海建设集团宁波宏阳建设有限公司 | Multifunctional automatic pile head for allowing plastic drainage plate to be inserted |
| CN104532824A (en) * | 2014-12-23 | 2015-04-22 | 浙江省水利水电勘测设计院 | Horizontal drainage system for vacuum preloading processing soft soil foundation |
-
2008
- 2008-12-04 CN CNU2008201438386U patent/CN201317936Y/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103243704A (en) * | 2013-05-02 | 2013-08-14 | 浙江大学舟山海洋研究中心 | Shallow mud foundation treatment method |
| CN103243704B (en) * | 2013-05-02 | 2015-03-18 | 浙江大学舟山海洋研究中心 | Shallow mud foundation treatment method |
| CN103410138A (en) * | 2013-06-09 | 2013-11-27 | 浙江省围海建设集团宁波宏阳建设有限公司 | Multifunctional automatic pile head for allowing plastic drainage plate to be inserted |
| CN103410138B (en) * | 2013-06-09 | 2015-05-13 | 浙江宏力阳生态建设股份有限公司 | Multifunctional automatic pile head for allowing plastic drainage plate to be inserted |
| CN104532824A (en) * | 2014-12-23 | 2015-04-22 | 浙江省水利水电勘测设计院 | Horizontal drainage system for vacuum preloading processing soft soil foundation |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| C53 | Correction of patent for invention or patent application | ||
| CB03 | Change of inventor or designer information |
Inventor after: Wang Keqin Inventor after: Yin Yan Inventor after: Cai Bo Inventor after: Zhu Ziping Inventor after: Chen Zhanfeng Inventor after: Tang Yuansong Inventor after: Liu Hongwei Inventor after: Li Xueyan Inventor after: Zhou Baojiang Inventor before: Tang Yuansong Inventor before: Wang Keqin Inventor before: Cai Bo Inventor before: Liu Hongwei Inventor before: Li Xueyan Inventor before: Chen Zhanfeng Inventor before: Yin Yan Inventor before: Zhu Ziping Inventor before: Zhou Baojiang |
|
| COR | Change of bibliographic data |
Free format text: CORRECT: INVENTOR; FROM: TANG YUANSONG; WANG KEQIN; CAI BO; LIU HONGWEI; LI XUEYAN; CHEN ZHANFENG; YIN GUANGTIAN; ZHU ZIPING; ZHOU BAOJIANG TO: WANG KEQIN; YIN GUANGTIAN; CAI BO; ZHU ZIPING; CHEN ZHANFENG; TANG YUANSONG; LIU HONGWEI; LI XUEYAN; ZHOU BAOJIANG |
|
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20090930 |
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| CX01 | Expiry of patent term |