CN101748734A - Foundation pit side slope sandy soil drainage method - Google Patents
Foundation pit side slope sandy soil drainage method Download PDFInfo
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- CN101748734A CN101748734A CN200810204056A CN200810204056A CN101748734A CN 101748734 A CN101748734 A CN 101748734A CN 200810204056 A CN200810204056 A CN 200810204056A CN 200810204056 A CN200810204056 A CN 200810204056A CN 101748734 A CN101748734 A CN 101748734A
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- side slope
- foundation pit
- filter
- sandy soil
- drainage method
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Abstract
The invention relates to foundation construction field, in particular to a sand soil drainage method for foundation pit side slope. The foundation pit side slope sandy soil drainage method includes that: step 1, filter pipe fabrication; step 2, water filter pipe embedment; the foundation pit is excavated to the scale height of the sand layer, and the filter pipe fabricated in step 1 is embedded in the sandy interlayer of the side slope and is communicated with a vacuum pump; step 3, the vacuum pump is started: the pump operates to drain water; step 4, the lower soil is continuously excavated. The invention can utilize vacuum negative pressure principle to enable the vacuum dewatering filter head to be transversely laid in the quicksand layer for quickly absorbing the effluent water of the sandy interlayer, is convenient, simple and quick in treating quicksand, and has high construction efficiency.
Description
Technical field
The present invention relates to foundation construction field, especially sand soil drainage method for foundation pit side slope.
Background technology
China all reclaims land from the sea many coastal areas, and the beach between land and the ocean is transformed into the soil that industrial or agricultural can be adopted.Wherein, all need establish the rainwater comb in the road construction underground row.Usually, be dregs layer, burning into sand layer and the silt clay layer of backfill successively under this type of regional pavement of road.And the depth of burying of rainwater comb is just in the burning into sand layer because be rich in water in the burning into sand layer and infiltration mobile, cause slope excavation after, the water in the burning into sand layer forms quicksand and causes the side slope unstable phenomenon.For this reason, people adopt and to beat on the foundation ditch limit that timber is fixed and absorb the water that the burning into sand layer is discharged with the base sand pocket, and this method not only drainage effect is not good, prolongation duration, and cost height.
Summary of the invention
The present invention is intended to address the deficiencies of the prior art, and a kind of foundation pit side slope sandy soil drainage method is provided.The present invention can utilize the principle of negative pressure of vacuum, and the filter that becomes vacuum-dewatering is absorbed the water outlet of burning into sand layer rapidly in the drift sand formation that laterally is laid in, and it is simple and convenient, quick to handle quicksand, the efficiency of construction height.
The present invention is achieved in that a kind of foundation pit side slope sandy soil drainage method, and it comprises:
Step 1, chimney filter is made;
Step 2, filter pipe is buried underground; Be excavated to the absolute altitude place of burning into sand layer, the chimney filter that step 1 is made is embedded in the burning into sand layer of side slope, and this chimney filter is communicated with a vacuum pump;
Step 3 is opened vacuum pump: change pump drainage;
Step 4 continues to dig subsoil.
Described foundation pit side slope sandy soil drainage method, described step 1 comprise, bore the infiltration hole on the plastic pipe tube wall, are the arrangement of plum blossom shape, and aperture Φ 12mm spacing is 500mm, and porosity is greater than 15%, and tube wall is provided with filter screen outward.
Described foundation pit side slope sandy soil drainage method, described filter screen comprise inside and outside two-layer, and inner filter screen is 30～80 purpose nylon wires, and outer filter is 5 purpose nylon wires, and fasten on chimney filter with iron wire at interval.
Described foundation pit side slope sandy soil drainage method, described step 2 comprises: the burning into sand layer on the artificial laterally cleaning excavation slope, described chimney filter is embedded in the burning into sand layer of side slope, and supports in arranged outside at a certain distance temporarily, with burying with seal the chimney filter pipeline outside with clay.
Described foundation pit side slope sandy soil drainage method, described step 2 comprises: the chimney filter interlude of described level production is provided with a tee junction and connects vacuum pump and chimney filter with the transparent hose with the interior steel wire ring that supports.
Described foundation pit side slope sandy soil drainage method, described step 3 comprise, behind filter pipe built-in length 50～80m, can change pump drainage, and the vacuum that vacuum pump produced is drawn onto the water in the burning into sand layer in the filter pipe and discharges.
The present invention adopts the PVC filter pipe mode of the embedding Φ 50 of level in the thick burning into sand layer of 200～300mm to solve the drainage problem.Horizontal chimney filter is communicated with the person in charge of vacuum pump, utilizes negative pressure of vacuum to absorb the water outlet of burning into sand layer rapidly, and it is simple and convenient, quick to handle quicksand, the efficiency of construction height.What the invention solves conventional employing beats timber also with the defective of the method stabilization by drainage of building sand pocket, intercepts water in the side slope drifting sand layer and changes from passive to active, and effect is obvious, construction period is short, less investment, and filter pipe can have enough to meet the need and recycle, and reduces construction cost greatly and reduces energy consumption.
The specific embodiment
A kind of foundation pit side slope sandy soil drainage method, it comprises:
Step 1, chimney filter is made;
Step 2, filter pipe is buried underground; Be excavated to the absolute altitude place of burning into sand layer, the chimney filter that step 1 is made is embedded in the burning into sand layer of side slope, and this chimney filter is communicated with a vacuum pump;
Step 3 is opened vacuum pump: change pump drainage;
Step 4 continues to dig subsoil.
Particularly, each step comprises:
Chimney filter is made:
With Φ 50PVC plastic pipe, the infiltration pitch of holes of boring Φ 12mm on tube wall is 500mm, is the arrangement of plum blossom shape, porosity should be greater than 15%, the two-layer filter screen of tube wall peripheral hardware, and inner filter screen adopts 30～80 purpose nylon wires, outer filter adopts 5 purpose nylon wires, fastens with iron wire every 500mm.
Filter pipe is buried underground:
When the absolute altitude place of digging to the burning into sand layer, burning into sand layer on the artificial laterally cleaning excavation slope is to horizontal depth 500mm place, the Φ 50PVC chimney filter that interior out filtering layer is arranged that parcel is good is embedded in the burning into sand layer of side slope, and every 2.0m at the reinforcing bar of Φ 14 long 600mm of outside nail as interim support, with burying with outside the clay closed conduct.
Open vacuum pump:
Behind filter pipe built-in length 50～80m, can change pump drainage.The horizontal tube interlude is provided with a tee junction.Transparent hose with the steel wire ring that supports in the band is connected with the threeway head, and the vacuum that is produced is drawn onto the water in the burning into sand layer in the filter pipe and discharges.
Continue to dig subsoil:
When the skerry on the side slope is moisture stopped after, when continuing to dig down layer cubic metre of earth, do not had the quicksand in the burning into sand layer to occur on the side slope, side slope can unstability, construction can normally be carried out.
Claims (6)
1. foundation pit side slope sandy soil drainage method is characterized in that it comprises:
Step 1, chimney filter is made;
Step 2, filter pipe is buried underground; Be excavated to the absolute altitude place of burning into sand layer, the chimney filter that step 1 is made is embedded in the burning into sand layer of side slope, and this chimney filter is communicated with a vacuum pump;
Step 3 is opened vacuum pump: change pump drainage;
Step 4 continues to dig subsoil.
2. foundation pit side slope sandy soil drainage method according to claim 1 is characterized in that; Described step 1 comprises, bores the infiltration hole on the plastic pipe tube wall, is the arrangement of plum blossom shape, and porosity is greater than 15%, and tube wall is provided with filter screen outward.
3. foundation pit side slope sandy soil drainage method according to claim 2 is characterized in that, described filter screen comprises inside and outside two-layer, and inner filter screen is 30～80 purpose nylon wires, and outer filter is 5 purpose nylon wires, and fastens on chimney filter with iron wire at interval.
4. foundation pit side slope sandy soil drainage method according to claim 1, it is characterized in that, described step 2 comprises: the burning into sand layer on the artificial laterally cleaning excavation slope, described chimney filter is embedded in the burning into sand layer of side slope, and support in arranged outside at a certain distance, with burying with seal the chimney filter pipeline outside with clay. temporarily
5. foundation pit side slope sandy soil drainage method according to claim 1 is characterized in that, described step 2 comprises: the chimney filter interlude of described level production is provided with a tee junction and connects vacuum pump and chimney filter with the transparent hose with the interior steel wire ring that supports.
6. foundation pit side slope sandy soil drainage method according to claim 1 is characterized in that, described step 3 comprises, behind filter pipe built-in length 50～80m, changes pump drainage, and the vacuum that vacuum pump produced is drawn onto the water in the burning into sand layer in the filter pipe and discharges.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810204056A CN101748734A (en) | 2008-12-04 | 2008-12-04 | Foundation pit side slope sandy soil drainage method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810204056A CN101748734A (en) | 2008-12-04 | 2008-12-04 | Foundation pit side slope sandy soil drainage method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101748734A true CN101748734A (en) | 2010-06-23 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200810204056A Pending CN101748734A (en) | 2008-12-04 | 2008-12-04 | Foundation pit side slope sandy soil drainage method |
Country Status (1)
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| CN (1) | CN101748734A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102787608A (en) * | 2012-08-17 | 2012-11-21 | 中国土木工程集团有限公司 | Gravity type foundation pit supporting system under vacuum effect and construction method |
| CN102966090A (en) * | 2012-12-14 | 2013-03-13 | 北京科技大学 | System for automatically draining water on side slope and method therefor |
| CN103452118A (en) * | 2013-03-22 | 2013-12-18 | 中国建筑股份有限公司上海分公司 | Foundation pit slope soil-nailing dewatering support construction method |
| CN105256684A (en) * | 2015-09-08 | 2016-01-20 | 河南万里路桥集团股份有限公司 | Embankment transverse draining construction method |
| CN106801427A (en) * | 2016-12-15 | 2017-06-06 | 宁波二十冶建设有限公司 | Foundation ditch horizontal precipitation device and its application method |
| CN107970659A (en) * | 2017-12-27 | 2018-05-01 | 神翼航空器科技（天津）有限公司 | On-site slurry separator and its separation method |
| CN108277807A (en) * | 2018-04-09 | 2018-07-13 | 浙江乔兴建设集团有限公司 | Deep basal pit artesian water is prominent to gush decompression control water-bound |
-
2008
- 2008-12-04 CN CN200810204056A patent/CN101748734A/en active Pending
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102787608A (en) * | 2012-08-17 | 2012-11-21 | 中国土木工程集团有限公司 | Gravity type foundation pit supporting system under vacuum effect and construction method |
| CN102966090A (en) * | 2012-12-14 | 2013-03-13 | 北京科技大学 | System for automatically draining water on side slope and method therefor |
| CN102966090B (en) * | 2012-12-14 | 2014-07-02 | 北京科技大学 | System for automatically draining water on side slope and method therefor |
| CN103452118A (en) * | 2013-03-22 | 2013-12-18 | 中国建筑股份有限公司上海分公司 | Foundation pit slope soil-nailing dewatering support construction method |
| CN103452118B (en) * | 2013-03-22 | 2015-10-14 | 中国建筑股份有限公司上海分公司 | A kind of excavation slope soil nailing de-watering and shoring construction method |
| CN105256684A (en) * | 2015-09-08 | 2016-01-20 | 河南万里路桥集团股份有限公司 | Embankment transverse draining construction method |
| CN106801427A (en) * | 2016-12-15 | 2017-06-06 | 宁波二十冶建设有限公司 | Foundation ditch horizontal precipitation device and its application method |
| CN106801427B (en) * | 2016-12-15 | 2019-05-28 | 宁波二十冶建设有限公司 | Foundation pit horizontal precipitation device and its application method |
| CN107970659A (en) * | 2017-12-27 | 2018-05-01 | 神翼航空器科技（天津）有限公司 | On-site slurry separator and its separation method |
| CN108277807A (en) * | 2018-04-09 | 2018-07-13 | 浙江乔兴建设集团有限公司 | Deep basal pit artesian water is prominent to gush decompression control water-bound |
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Open date: 20100623 |