CN101457519A - Rapid 'stereo high vacuum water covering prepressing' superficial layer flexible foundation treatment method - Google Patents
Rapid 'stereo high vacuum water covering prepressing' superficial layer flexible foundation treatment method Download PDFInfo
- Publication number
- CN101457519A CN101457519A CNA2007101721271A CN200710172127A CN101457519A CN 101457519 A CN101457519 A CN 101457519A CN A2007101721271 A CNA2007101721271 A CN A2007101721271A CN 200710172127 A CN200710172127 A CN 200710172127A CN 101457519 A CN101457519 A CN 101457519A
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- Prior art keywords
- water
- draining board
- vacuum
- steel wire
- embankment
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Links
- 238000000034 method Methods 0.000 title claims abstract description 29
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 20
- 239000004746 geotextile Substances 0.000 claims abstract description 13
- 239000002689 soil Substances 0.000 claims abstract description 12
- 241000532412 Vitex Species 0.000 claims abstract description 9
- 238000005086 pumping Methods 0.000 claims abstract description 9
- 239000004744 fabric Substances 0.000 claims abstract description 7
- 230000003203 everyday effect Effects 0.000 claims abstract description 4
- 229910000831 Steel Inorganic materials 0.000 claims description 11
- 239000010959 steel Substances 0.000 claims description 11
- 241000196324 Embryophyta Species 0.000 claims description 10
- 235000001667 Vitex agnus castus Nutrition 0.000 claims description 7
- 239000000835 fiber Substances 0.000 claims description 6
- 238000004062 sedimentation Methods 0.000 claims description 5
- 238000012946 outsourcing Methods 0.000 claims description 4
- 238000010276 construction Methods 0.000 abstract description 7
- 239000004576 sand Substances 0.000 abstract description 7
- 235000009347 chasteberry Nutrition 0.000 abstract 2
- 230000002093 peripheral effect Effects 0.000 abstract 2
- 239000007787 solid Substances 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 4
- 238000012545 processing Methods 0.000 description 2
- 238000007596 consolidation process Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D3/00—Improving or preserving soil or rock, e.g. preserving permafrost soil
- E02D3/02—Improving by compacting
- E02D3/10—Improving by compacting by watering, draining, de-aerating or blasting, e.g. by installing sand or wick drains
Abstract
The invention provides a fast treating method of shallow soft foundation by solid and high-vacuum heaped preloading. The method comprises the following steps: (A) the surface of the soft soil is laid with a layer of striped fabric which is laid with a layer of vitex basketry; the vitex basketry is laid with a layer of geotextile which is inserted with a plastic draining board; the plastic draining board is externally left by a proper length and is provided with a horizontal draining facility; one end of the horizontal draining facility is connected with the externally left part of the draining board and the other end thereof is connected with vacuum-pumping equipment; a vacuum film is laid on the horizontal draining facility which is built with a small peripheral dyke and is provided with a water-stop film; (B) vacuum pumping is carried out, and the pumped water is injected into the peripheral dyke so as to form heaped water; and (C) after vacuum pumping is carried out for a period, settling condition is observed; if the settlement everyday is less than 2 to 5mm for continuous 3 to 7 days, the vacuum pumping is stopped. The method provided with invention is adopted to treat the soft soil foundation, thus being capable of achieving the purpose of treating the soft soil foundation fast and simply, also avoiding the use of heavy mechanical equipment and sand mats and reducing the construction cost.
Description
Technical field
The present invention relates to a kind of method of large-area Soft Ground, specifically, relate to a kind of rapid ' stereo high vacuum water covering prepressing ' superficial layer flexible foundation treatment method.
Background technology
At present the method for conventional consolidation Soft Ground mainly contains: three kinds of vacuum method, preloading and High vacuum compacting methods.Adopt above method to carry out Soft Ground, all need to use machinery to walk in the enterprising every trade of subgrade, therefore, the initial bearing capacity of ground generally need be more than 30～40KPa.And at the seabeach, the zone of new hydraulic reclamation, its initial bearing capacity is almost nil, therefore can't directly use said method to carry out treatment of soft foundation, and needs to improve earlier the initial bearing capacity of ground.
In order to improve initial bearing capacity, the method that adopts is at present: lay geotextiles earlier, re-lay the chaste tree fragrant plant, add the thick sand cushion of 0.5～1.5m again.The effect of sand cushion both can improve the initial bearing capacity of ground, can do the horizontal channel of vacuum preloading again.
But, use sand cushion, its investment is bigger, but also therefore not environmental protection, is necessary to improve this job practices, to reduce construction cost.
Summary of the invention
The objective of the invention is to, a kind of rapid ' stereo high vacuum water covering prepressing ' superficial layer flexible foundation treatment method is provided, thereby avoid using heavy plant equipment, and save the huge sand cushion of investment, to reduce construction cost, accelerating construction progress.
Rapid ' stereo high vacuum water covering prepressing ' superficial layer flexible foundation treatment method of the present invention may further comprise the steps:
At first lay one deck colour bar cloth on the weak soil top layer, on colour bar cloth, lay one deck chaste tree fragrant plant, on the chaste tree fragrant plant, lay one deck geotextiles, on the geotextiles of laying, manually plug some plastic draining boards then, and stay suitable length outward, be horizontally disposed with some horizontal drainage facilities simultaneously, an end of horizontal drainage facility is connected with the outer part of staying of plastic draining board, and the other end then connects vaccum-pumping equipment; Laying vacuum diaphragm on the horizontal drainage facility, and around build little embankment (water retaining dike), water-separating film is set on the embankment;
Start vaccum-pumping equipment then and begin to vacuumize, the water of releasing is injected in the embankment, form naturally and cover water to increase pressure; Observation sedimentation situation after a period of time, then stops to vacuumize less than 2～5mm as the sedimentation of continuous 3～7 day every day.
According to the present invention, described horizontal drainage facility adopts ventilative steel wire tube or fiber draining bag.
According to the present invention, the outer length of staying of described plastic draining board is 30～60cm.
According to the present invention, described plastic draining board is arranged as square or equilateral triangle.
According to the present invention, the spacing of described plastic draining board is 1.1～1.4 meters.
According to the present invention, the spacing of described ventilative steel wire tube is 1～4 meter.
According to the present invention, described embankment inner area is 10000～50000m
2
According to the present invention, described embankment height is 1.5～3.5 meters.
According to the present invention, the described time that vacuumizes is 1～5 month.
Adopt method provided by the invention, soft soil foundation, particularly during the almost nil soft foundation of the initial bearing capacities such as zone of seabeach, new hydraulic reclamation, can reach the purpose that subgrade not only fast but also that economize is handled, simultaneously, can also avoid using heavy plant equipment, and save the huge sand cushion of investment, thereby reduce construction cost.
Description of drawings
Fig. 1 is that plastic draining board is arranged schematic diagram.
Fig. 2 is ventilative steel wire tube schematic diagram
Fig. 3 is a fiber draining bag schematic diagram
Fig. 4 is a processing method schematic diagram of the present invention.
The specific embodiment
Below in conjunction with specific embodiment, the invention will be further described.Should be understood that following examples only are used to the present invention is described but not are used to limit scope of the present invention.
Embodiment, certain 1,000,000 m
2The mud of firm hydraulic reclamation, the initial almost nil special soft place of bearing capacity
Because this place is the mud of firm hydraulic reclamation, its initial bearing capacity is almost nil, therefore, need carry out ground and handle, and makes its bearing capacity be increased to 40-60Kpa, so that carry out follow-up construction.Method for processing foundation is specific as follows:
At first lay one deck colour bar cloth,, on colour bar cloth, lay one deck chaste tree fragrant plant then, as the second layer, on the chaste tree fragrant plant, lay geotextiles then, as the 3rd layer as first floor on the weak soil top layer.
With reference to figure 1～4, on the geotextiles of laying, utilize light artificial flashboard rack, arrange plastic draining board in the mode that manually plugs, band drain is arranged to square or equilateral triangle, and the spacing of plastic draining board is 1.1～1.4 meters, and stays 30～60cm outside plastic draining board is above geotextiles.
Be horizontally disposed with some horizontal drainage facilities (ventilative steel wire tube or fiber draining bag) simultaneously, the spacing of horizontal drainage facility is 2～4 meters, one end of horizontal drainage facility is connected with the outer part of staying of plastic draining board, and the other end then connects vaccum-pumping equipment (using jet pump in the present embodiment).Wherein, ventilative steel wire tube as the horizontal drainage facility is that the diameter that geotextiles outsourcing steel wire is rolled into is the bend pipe (as shown in Figure 2) of 30～60cm, and fiber level draining bag is the satchel (as shown in Figure 3) that geotextiles or linen outsourcing string tow form.
The two-layer vacuum diaphragm of laying on the horizontal drainage facility then, respectively as the 4th layer, layer 5, thereby the laying of having finished on the ground of weak soil top layer prepare, and begin to prepare to vacuumize.
With reference to figure 4, with 10000～50000m
2The above-mentioned weak soil top layer ground that lays be arranged to one and cover water unit, around covering water unit, this builds water retaining dike, highly usually, be about 1.5～3.5m, and a water-separating film is set on water retaining dike, use jet pump to begin to vacuumize then, and the water that will vacuumize out injects in the dike, form nature and cover water, to increase pressure to soft foundation, vacuumized about 1～2 month, carry out settlement observation, observed continuous 3～7 days, the sedimentation of every day is all less than 2～5mm, and stop to vacuumize this moment, and detects bearing capacity of foundation soil.After testing, bearing capacity of foundation soil is at this moment brought up to 80Kpa from 10KPa, reaches the processing target of expection.
Through estimation, the operating expenses of present embodiment is 60～70% of a conventional vacuum preloading.
Therefore, rapid ' stereo high vacuum water covering prepressing ' superficial layer flexible foundation treatment method of the present invention can reach not only fast but also economize the purpose of ground soft soil foundation treatment, simultaneously, can also avoid using heavy plant equipment, and invest huge sand cushion, thereby reduce construction cost.
Claims (11)
1, a kind of rapid ' stereo high vacuum water covering prepressing ' superficial layer flexible foundation treatment method is characterized in that, may further comprise the steps:
A) lay one deck colour bar cloth on the weak soil top layer, on colour bar cloth, lay one deck chaste tree fragrant plant, on the chaste tree fragrant plant, lay one deck geotextiles, on the geotextiles of laying, manually plug plastic draining board then, and stay suitable length outward, be horizontally disposed with some horizontal drainage facilities simultaneously, an end of horizontal drainage facility is connected with the outer part of staying of plastic draining board, and the other end then connects vaccum-pumping equipment; Laying vacuum diaphragm on ventilative steel wire tube, and around build little embankment, water-separating film is set on the embankment;
B) start vaccum-pumping equipment and begin to vacuumize, the water of releasing is injected in the embankment, form naturally and cover water to increase pressure;
C) vacuumize a period of time after, observation sedimentation situation, then stops to vacuumize less than 2～5mm as the sedimentation of continuous 3～7 day every day.
2, the method for claim 1 is characterized in that, described horizontal drainage facility is selected from ventilative steel wire tube or fiber draining bag.
3, the method for claim 1 is characterized in that, described ventilative steel wire tube is that the diameter that geotextiles outsourcing steel wire is rolled into is the bend pipe of 30～60cm.
4, the method for claim 1 is characterized in that, described fiber level draining bag is the satchel that geotextiles or linen outsourcing string tow form.
5, the method for claim 1 is characterized in that, the outer length of staying of described plastic draining board is 30～60cm.
6, the method for claim 1 is characterized in that, described plastic draining board is arranged as square or equilateral triangle.
7, the method for claim 1 is characterized in that, the spacing of described plastic draining board is 1.1～1.4 meters.
8, the method for claim 1 is characterized in that, the spacing of described ventilative steel wire tube is 1～4 meter.
9, the method for claim 1 is characterized in that, described embankment inner area is 10000～50000m
2
10, the method for claim 1 is characterized in that, described embankment height is 1.5～3.5 meters.
11, the method for claim 1 is characterized in that, the described pumpdown time is 1～5 month.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007101721271A CN101457519B (en) | 2007-12-12 | 2007-12-12 | Rapid 'stereo high vacuum water covering prepressing' superficial layer flexible foundation treatment method |
| PCT/CN2008/073090 WO2009074041A1 (en) | 2007-12-12 | 2008-11-17 | Rapid treatment method for shallow weak ground |
| MYPI2010002743A MY157332A (en) | 2007-12-12 | 2008-11-17 | Rapid treatment method for shallow weak ground |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007101721271A CN101457519B (en) | 2007-12-12 | 2007-12-12 | Rapid 'stereo high vacuum water covering prepressing' superficial layer flexible foundation treatment method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101457519A true CN101457519A (en) | 2009-06-17 |
| CN101457519B CN101457519B (en) | 2010-09-22 |
Family
ID=40755233
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2007101721271A Active CN101457519B (en) | 2007-12-12 | 2007-12-12 | Rapid 'stereo high vacuum water covering prepressing' superficial layer flexible foundation treatment method |
Country Status (3)
| Country | Link |
|---|---|
| CN (1) | CN101457519B (en) |
| MY (1) | MY157332A (en) |
| WO (1) | WO2009074041A1 (en) |
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| CN103225267A (en) * | 2013-03-29 | 2013-07-31 | 天津二十冶建设有限公司 | Construction method of deep and thick soft soil foundation bed bridge abutment |
| CN103397627A (en) * | 2013-08-21 | 2013-11-20 | 上海港湾基础建设（集团）有限公司 | Improved causeway water overlaying preloading method |
| CN104746506A (en) * | 2013-12-30 | 2015-07-01 | 深圳市工勘岩土工程有限公司 | Soft soil combined preloading structure and construction method |
| CN105350511A (en) * | 2015-12-01 | 2016-02-24 | 浙江理工大学 | Border dike water bag strip, water storing border dike, and method for performing water bag strip pile-loading and prepressing |
| CN105862714A (en) * | 2016-06-01 | 2016-08-17 | 上海建研地基基础工程有限公司 | Soft foundation water cover type integrated well point plastic strip vacuum system |
| CN105862719A (en) * | 2016-06-01 | 2016-08-17 | 上海建研地基基础工程有限公司 | Reinforced foundation |
| CN105862717A (en) * | 2016-06-01 | 2016-08-17 | 上海建研地基基础工程有限公司 | Integrated well point plastic strip vacuum system |
| CN105926577A (en) * | 2016-06-01 | 2016-09-07 | 上海建研地基基础工程有限公司 | Vacuum prepressing seepage consolidation method |
| CN105970910A (en) * | 2016-06-01 | 2016-09-28 | 上海建研地基基础工程有限公司 | Well point plastic draining pipe film coating type vacuum preloading and dewatering preloading combined power consolidation method |
| CN107761700A (en) * | 2017-10-10 | 2018-03-06 | 武汉大学 | The ballast method of soft soil foundation |
| CN107870128A (en) * | 2017-01-05 | 2018-04-03 | 天津大学 | A kind of mudding formula vacuum preloading laboratory test model |
| CN113216145A (en) * | 2021-05-12 | 2021-08-06 | 国强建设集团有限公司 | Vacuum preloading construction method for steel sheet pile combined clay sealing wall |
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| JP3270968B2 (en) * | 1990-06-17 | 2002-04-02 | 丸山工業株式会社 | Improved construction method for soft ground and its improved construction equipment |
| US7198430B2 (en) * | 2002-10-31 | 2007-04-03 | Maruyama Kougyo Kabushikikaisha | Reformation of soft soil and system therefor |
| CN100340721C (en) * | 2005-04-01 | 2007-10-03 | 东南大学 | Operation method for consolidating soft soil foundation by pneumatic flerry vacuum preloading method |
| CN100516375C (en) * | 2006-03-07 | 2009-07-22 | 张志铁 | Combined method for fastening soft soil ground by dual vacuum prepressing and dynamic extruding method |
| CN100473786C (en) * | 2006-03-23 | 2009-04-01 | 周健 | Soft soil foundation high side pressure quick-discharging consolidation method |
| CN1884709A (en) * | 2006-06-21 | 2006-12-27 | 徐士龙 | Quick soft groundsill consolidation method of filling water for prepressing, kinetic differential pressure for discharging water |
| CN1884708A (en) * | 2006-07-11 | 2006-12-27 | 张志铁 | Method for integrative consolidation of soft soil groundsill by double vacuum self-load combined prepress and dynamic squeeze |
| CN100537903C (en) * | 2006-11-20 | 2009-09-09 | 包国建 | " short distance overload vacuum precompression and dynamic water-drainage consolidation combination method " soft soil foundation processing method |
-
2007
- 2007-12-12 CN CN2007101721271A patent/CN101457519B/en active Active
-
2008
- 2008-11-17 MY MYPI2010002743A patent/MY157332A/en unknown
- 2008-11-17 WO PCT/CN2008/073090 patent/WO2009074041A1/en active Application Filing
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| CN103225267A (en) * | 2013-03-29 | 2013-07-31 | 天津二十冶建设有限公司 | Construction method of deep and thick soft soil foundation bed bridge abutment |
| CN103225267B (en) * | 2013-03-29 | 2015-07-15 | 天津二十冶建设有限公司 | Construction method of deep and thick soft soil foundation bed bridge abutment |
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| CN104746506A (en) * | 2013-12-30 | 2015-07-01 | 深圳市工勘岩土工程有限公司 | Soft soil combined preloading structure and construction method |
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Also Published As
| Publication number | Publication date |
|---|---|
| WO2009074041A1 (en) | 2009-06-18 |
| MY157332A (en) | 2016-05-31 |
| CN101457519B (en) | 2010-09-22 |
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| CP03 | Change of name, title or address | ||
| CP03 | Change of name, title or address |
Address after: 201507 Shanghai Jinshan District, Caojing Town, Ting Wei Road, 3316, 1, two, 207 rooms. Patentee after: Shanghai Bay infrastructure construction (Group) Limited by Share Ltd Address before: 201507 eight Caojing Town, Jinshan District, Shanghai Patentee before: Shanghai harbor infrastructure (Group) Co., Ltd. |