CN101591907A - The disjunctor vacuum preloading method for quickly treating of hydraulic reclamation stream mud ground base - Google Patents
The disjunctor vacuum preloading method for quickly treating of hydraulic reclamation stream mud ground base Download PDFInfo
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- CN101591907A CN101591907A CNA2009100538545A CN200910053854A CN101591907A CN 101591907 A CN101591907 A CN 101591907A CN A2009100538545 A CNA2009100538545 A CN A2009100538545A CN 200910053854 A CN200910053854 A CN 200910053854A CN 101591907 A CN101591907 A CN 101591907A
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- stream mud
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Abstract
The present invention relates to a kind of disjunctor vacuum preloading method for quickly treating of hydraulic reclamation stream mud ground base.This method hydraulic reclamation is handled once finishing to carry out ground, need not to lay the sand cushion as horizontal drainage passage and construction cushion coat, the disjunctor plastic draining board that adopts horizontal draining board and vertical drainage plate to hold together.The present invention compare with the traditional vacuum precompressed have the duration can save 1/3～1/2, cost can reduce outstanding advantage such as 1/4～1/3, the present invention has good economic benefit and wide application prospect.
Description
Technical field
The present invention relates to a kind of disjunctor vacuum preloading method for quickly treating of hydraulic reclamation stream mud ground base, particularly horizontal drainage passage and vertical drainage passage are held together, significantly reduced the vacuum transmission loss, do not need to lay sand cushion behind the hydraulic reclamation, directly insert and beat the shop plastic draining board, lay a kind of soft foundation processing method that geotextiles and vacuum diaphragm can be carried out the vacuum preloading processing, belong to Soft Ground technical field in the geotechnical engineering.
Background technology
1) hydraulic fill foundation is handled wide application prospect
Can support the minimizing that utilizes the soil along with the city, in recent years people in coastal, river, along the river hydraulic reclamation epeirogenetic engineering is increasing, and is relatively more typical in Qingdao Hai Xiwan BEIHAI SHIPYARD, Shenzhen Airport enlarging, Nanhui District Harbor, Shanghai new city, industrial occupancy, Harbor, Tianjin, the peninsula, Wenzhou engineering etc.Most of barged-in fill have easily flow, high-moisture, high-compressibility, weak infiltrative characteristics, belong to weak soil, must could satisfy instructions for use through handling after the hydraulic reclamation, just land resources is in short supply at present, this class engineering also can roll up in the future, thereby the processing of barged-in fill ground has wide application prospect.
2) conventional method for processing foundation
For saturated dredger soft soil, conventional processing method has piling prepressing, vacuum preloading, ram by force, shake and dash etc., these methods all each have its scope of application: preloading requires to intend the disposal field and has the above bearing capacity of foundation soil of 40 ~ 50kPa at least, the piling up of construction and preloading material so that the preloading vehicle is marched into the arena, be characterized in that treatment effect is reliable, deficiency is overlong time and preloading material transition problem.Vacuum preloading requires to intend the disposal field can lay 30 ~ 50cm medium coarse sand bed course at least, so that construction cushion coat and horizontal drainage passage as follow-up work, being characterized in handling load, to apply speed fast, there is not the foundation instability problem, the ground processing time is short, deficiency promptly needs sand cushion, and rare area is used and is restricted in the sand source.The strong rammer requires the foundation soil body water content to surpass 30%, clay content is unsuitable too high, there is certain bearing capacity on the top layer, for the careful usefulness of saturated soft clay, so generally be used for places such as the bigger sand gravel of hydraulic reclamation particle diameter, coarse sand, fine sand, powder fine sand and sandy silt, the general Treatment by Dynamic Compaction degree of depth is within 8m.Vibroflotation method also requires the place that certain initial bearing capacity is arranged, and apparent in view for place treatment effects such as hydraulic reclamation medium coarse sand, fine sand, powder fine sands, the degree of depth can reach more than the 20m.
The characteristics of present most of blast-filled grounds are: 1) just finished hydraulic reclamation, no consolidation time; 2) surface strength is approximately zero; 3) the barged-in fill particle is thin, index of plasticity is high; 4) water content is high, permeance property is extremely low.In short summary is high-moisture, high viscosity, low intensive stream mud place, because man-machine can't marching into the arena, There is no way to begin to cause conventional at present method for processing foundation, and the disjunctor vacuum method just is being based on a kind of ground New Method for Processing that this present situation is developed.
Summary of the invention
The objective of the invention is to have defective at prior art, a kind of disjunctor vacuum preloading method for quickly treating of hydraulic reclamation stream mud ground base is provided, for achieving the above object, design of the present invention is: because hydraulic reclamation stream mud water content is high, bearing capacity of foundation soil is extremely low, the ground processing machine can't enter, and at these many difficult points, the present invention improves conventional vacuum method, be specially: 1) cancellation sand cushion, with about two-layer geotextiles and replace at the therebetween plastic draining board; 2) vertical drainage plate and horizontal draining board do not disconnect, but do as a wholely, form by many " V " font shapes side by side and are arranged in the stratum; 3) length generally should not surpass 20m behind " V " font plastic draining plate development side by side, if the material permeance property is good, also can suitably extend; 4) " V " font plastic draining board two ends link with the vacuum chimney filter respectively; 5) the vacuum chimney filter is connected with the person in charge, is responsible for the vacuum pump of outside, place to be connected.
According to the foregoing invention design, the present invention adopts following technical proposals: a kind of disjunctor vacuum preloading method for quickly treating of hydraulic reclamation stream mud ground base is characterized in that just carrying out fast processing by following step behind the hydraulic reclamation:
1) be linked to be pontoon bridge as pioneer road with cystosepiment, in the work progress particularly in the plate process as mobile platform;
2) lay one deck braided geotextile 4. at stream mud ground primary surface, one side is as the bottom surface filtration beds of disjunctor vacuum preloading upper level bed course, on the other hand as the construction topping, in order to avoid the constructor falls into stream mud;
3) artificial inserting tied the plastic draining board that row is arranged, described every plastic draining board is that vertical drainage plate and horizontal draining board fuse and form the disjunctor plastic draining board, and the vertical drainage plate forms a plurality of " V " type, T-shape or " U " type shapes side by side and is arranged in the stratum;
4) two ends of plastic draining board are wrapped in respectively on the draining chimney filter of both sides, it between two adjacent chimney filters a unit, after each node on the single disjunctor band drain between unit is all inserted and is got to the position, the two ends of band drain are wrapped on the chimney filter of both sides respectively and colligation good;
5) the draining chimney filter links to each other with drain header by threeway or four-way, and drain header is connected on the vacuum pump of outside;
6) lay one deck non-woven geotextile, and spread braided geotextile and horizontal draining board and form the horizontal drainage passage jointly, play the effect of protection vacuum diaphragm in addition;
7) lay two-layer vacuum diaphragm, periphery is imbedded good seal in the stream mud;
8) the vacuum jet pump is installed and is vacuumized, draw sedimentation-time curve in the precompressed process, treat removal vacuum load behind the settlement stability, remove all facilities.
9) be responsible for the about 10 ~ 20m of spacing, the about 6 ~ 8m of chimney filter spacing is responsible for vertical mutually with chimney filter;
10) determine the plastic draining board degree of depth and spacing (i.e. two distances of inserting between the node) according to ground reinforcement depth and soil body penetration performance, the length of final definite single plastic draining board is not (for influencing vacuum transmission, veneer generally should not surpass 25m), manpower with the disjunctor plastic draining board 1. each node penetrate the geotextiles of having laid and be pressed in the foundation soil, need guarantee during by next node that last node is not taken up;
The present invention compared with prior art, have following conspicuous outstanding substantive distinguishing features and remarkable advantage: it is on traditional vacuum precompressed basis, the conversion mode of thinking, horizontal drainage passage and vertical drainage passage are fused, loss of vacuum is little, and the resistance of vacuum drainage is little, is more having superiority aspect duration and the cost, its duration can save 1/2 ~ 1/3, and cost can reduce by 1/4 ~ 1/3.
Above construction process is the conventional program of disjunctor vacuum preloading, and in concrete enforcement, each parameter is disjunctor spacing of prefabricated drain and length for example, chimney filter, is responsible for spacing and puts form etc. and all need to determine in conjunction with engineering experience simultaneously through calculating.
Description of drawings
Fig. 1 is that the ground fast processing of one embodiment of the invention is implemented longitudinal plan
Fig. 2 is that the ground fast processing of another embodiment of the present invention is implemented longitudinal plan
Fig. 3 is the enlarged drawing at A-A place among Fig. 1 and Fig. 2.
Fig. 4 is the enlarged drawing at B-B place among Fig. 1 and Fig. 2
Fig. 5 is the vertical view of Fig. 1
Among Fig. 1, Fig. 2 and Fig. 5: 1. being the disjunctor plastic draining board, 2. is lower floor's geotextiles, 3. is drain header, 4. is lower floor's geotextiles, 5. is the vacuum seal film, 6. is the vertical equity band drain, for the draining chimney filter, 8. is vacuum pump 7..
The specific embodiment
Case study on implementation accompanying drawings of the present invention is as follows:
Embodiment one:
Referring to Fig. 1 and Fig. 5, the disjunctor vacuum preloading method for quickly treating of this hydraulic reclamation stream mud ground base carries out with certain test site.
Certain ground Processing Test project, processing area is 2000m
2(be that 40m * 50m), just hydraulic reclamation marine facies mud finishes, man-machine can't marching into the arena, the about 2.5m of hydraulic reclamation stream mud thickness, transmission coefficient is 10
-6Below the cm/s, designing requirement preliminary treatment groundwork bearing capacity reaches 45kPa, and specific implementation process is as follows:
1) is linked to be pontoon bridge as pioneer road with cystosepiment, when plate, shop cloth, shop film, uses;
2) lay one deck braided geotextile 2. on stream mud surface, 1. the distance and the degree of depth are manually slotting beats plastic draining board by calculating, 1. plastic draining board is the disjunctor plastic draining board that 6. vertical drainage plate and horizontal draining board are connected as a body and form, and its vertical drainage plate forms " V " font and is arranged in the stratum;
3) 1. plastic draining board is connected to chimney filter and 7. goes up in two ends, adopts the canoe colligation, with perpendicular to the disjunctor band drain 1. direction more alternately level lay plastic draining board;
4) 3. drain header adopts four-way to be connected with threeway with the draining chimney filter between 2., and 8. the vacuum pump outside 3. drain header is connected to is gone up;
5) lay successively then one deck non-woven geotextile 4. with two-layer vacuum diaphragm 5., periphery imbed the sealing ditch in, but manpower treads in;
6) in vacuum diaphragm the sedimentation mark is set on 5., and vacuum meter is installed;
7) examination vacuumized after seal operation was finished, and checked gas leakage, treated that vacuum reaches 80kPa voltage stabilizing later under the film;
8) monitoring vacuum and settling amount are drawn sedimentation-time graph and vacuum-time graph;
9) total settlement reaches 60cm, and about 45 days of construction period, bearing capacity of foundation soil reaches 45kPa.
10) treat that sedimentation-time graph is stable after, removal vacuum load;
According to stream mud character, the chimney filter spacing is 5m, and person in charge's spacing is 20m, and the plastic draining board length after the expansion is 25m; The vertical part spacing of single disjunctor band drain is 1.0m, and adjacent disjunctor spacing of prefabricated drain is 0.8m; Plastic draining board adopts soft bellows, the outsourcing filter membrane, and drain header adopts soft or hard PVC pipe, and each drain header can be incorporated into a leader drain and be connected with vacuum pump.
Embodiment two:
Referring to Fig. 2 and Fig. 5, present embodiment is same as the previously described embodiments substantially, different heres be that the vertical portion of disjunctor plastic draining board divide to form " T " font and is arranged in the stratum.
Claims (5)
1. disjunctor vacuum preloading method for quickly treating to hydraulic reclamation stream mud is characterized in that just carrying out fast processing by following step behind the hydraulic reclamation:
1) is linked to be pontoon bridge as pioneer road with cystosepiment;
2) lay one deck braided geotextile at stream mud ground primary surface;
3) artificial inserting tied the plastic draining board that row is arranged, described every plastic draining board is that vertical drainage plate and horizontal draining board fuse and form the disjunctor plastic draining board, and the vertical drainage plate forms a plurality of " V " type, T-shape or " U " type shapes side by side and is arranged in the stratum;
4) two ends of described plastic draining board are wrapped in respectively on the both sides draining chimney filter;
5) described draining chimney filter links to each other with drain header by threeway or four-way, and described drain header is connected on the vacuum pump of outside;
6) lay one deck non-woven geotextile and two-layer vacuum diaphragm then successively, periphery is imbedded in the sealing ditch;
7) sedimentation mark and vacuum observation device are set on described vacuum diaphragm, vacuum pump are installed are vacuumized, monitoring vacuum and settling amount are drawn sedimentation-time graph, treat that sedimentation-time graph is stable after, removal vacuum load.
2. the disjunctor vacuum preloading method for quickly treating of hydraulic reclamation stream mud ground base according to claim 1, it is characterized in that: single disjunctor plastic draining board length is 15～40m, the vertical drainage distance between plates of single disjunctor plastic draining board is 0.6～1.5m, and adjacent disjunctor plastic draining distance between plates is 0.6～1.5m.
3. the disjunctor vacuum preloading method for quickly treating of hydraulic reclamation stream mud ground base according to claim 1 is characterized in that described draining chimney filter spacing is 4～8m, and described drain header spacing is 10～20m.
4. the disjunctor vacuum preloading method for quickly treating of hydraulic reclamation stream mud ground base according to claim 1 is characterized in that the draining chimney filter adopts soft bellows with holes, outsourcing filter membrane.
5. the disjunctor vacuum preloading method for quickly treating of hydraulic reclamation stream mud ground base according to claim 1 is characterized in that described drain header adopts soft or hard PVC pipe, and each drain header can be incorporated into a leader drain and be connected with described vacuum pump.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100538545A CN101591907B (en) | 2009-06-26 | 2009-06-26 | One-piece vacuum preloading method for quickly treating hydraulic fill hedoro foundation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100538545A CN101591907B (en) | 2009-06-26 | 2009-06-26 | One-piece vacuum preloading method for quickly treating hydraulic fill hedoro foundation |
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| Publication Number | Publication Date |
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| CN101591907A true CN101591907A (en) | 2009-12-02 |
| CN101591907B CN101591907B (en) | 2010-11-17 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2009100538545A Expired - Fee Related CN101591907B (en) | 2009-06-26 | 2009-06-26 | One-piece vacuum preloading method for quickly treating hydraulic fill hedoro foundation |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101906772A (en) * | 2010-07-26 | 2010-12-08 | 李燕青 | Fast consolidation method of blow-filled soft soil for land reclamation |
| CN102191771A (en) * | 2010-08-23 | 2011-09-21 | 上海大学 | Method for solidifying and processing soft soil foundation by draining water from plant cushion layer in vacuum |
| CN103510504A (en) * | 2012-06-15 | 2014-01-15 | 中国石油化工股份有限公司 | Processing method for highly saturated and uneven dredger fill soil foundation |
| CN109403305A (en) * | 2018-10-19 | 2019-03-01 | 杭州永创基建工程科技股份有限公司 | A kind of compacted modified enhancing processing method of the discharging consolidation soil body joint soil body of mechanical compression |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101324063B (en) * | 2008-08-06 | 2011-08-31 | 上海港湾软地基处理工程(集团)有限公司 | Special soft foundation consolidation method |
| CN101413262A (en) * | 2008-12-04 | 2009-04-22 | 中交第一航务工程勘察设计院有限公司 | Foundation treatment water drain structure of geotextile filter tube vacuum preloading method |
-
2009
- 2009-06-26 CN CN2009100538545A patent/CN101591907B/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101906772A (en) * | 2010-07-26 | 2010-12-08 | 李燕青 | Fast consolidation method of blow-filled soft soil for land reclamation |
| CN102191771A (en) * | 2010-08-23 | 2011-09-21 | 上海大学 | Method for solidifying and processing soft soil foundation by draining water from plant cushion layer in vacuum |
| CN102191771B (en) * | 2010-08-23 | 2013-11-06 | 上海大学 | Method for solidifying and processing soft soil foundation by draining water from plant cushion layer in vacuum |
| CN103510504A (en) * | 2012-06-15 | 2014-01-15 | 中国石油化工股份有限公司 | Processing method for highly saturated and uneven dredger fill soil foundation |
| CN103510504B (en) * | 2012-06-15 | 2015-11-18 | 中国石油化工股份有限公司 | High saturated uneven reclaimed ground processing method |
| CN109403305A (en) * | 2018-10-19 | 2019-03-01 | 杭州永创基建工程科技股份有限公司 | A kind of compacted modified enhancing processing method of the discharging consolidation soil body joint soil body of mechanical compression |
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| Publication number | Publication date |
|---|---|
| CN101591907B (en) | 2010-11-17 |
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