CN104234027A - Embedded blow-filled vibroflotation soft foundation processing method - Google Patents
Embedded blow-filled vibroflotation soft foundation processing method Download PDFInfo
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- CN104234027A CN104234027A CN201410447750.3A CN201410447750A CN104234027A CN 104234027 A CN104234027 A CN 104234027A CN 201410447750 A CN201410447750 A CN 201410447750A CN 104234027 A CN104234027 A CN 104234027A
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Abstract
The invention relates to a soft foundation processing method. The method comprises the following steps: (1) clearing up and leveling off landmarks of a soft foundation; (2) carrying out banking on an Nth surrounding generated in the step (1); (3) laying an initial stress layer on the leveled ground surface; (4) arranging dredge pipelines on the initial stress layer; (5) carrying out measurement and paying-off on the soil shallow layer and burying special pipelines for horizontal water collection; (6) carrying out soil blow-filling processing on the foundation structure generated in the steps; (7) carrying out silt supplementing processing on a blow-filled area generated in the step by using wool fabric woven hoses; (8) carrying out leveling processing on the ground obtained after silting in the step (6) is finished by a bulldozer; (9) carrying out high-frequency vibroflotation construction on the ground surface generated in the step by utilizing vibroflotation equipment. The soft foundation processing method has the main advantage of providing a soft foundation processing method which is simple and convenient, is low in cost and has a short construction period.
Description
Technical field
The invention relates to method for processing foundation, especially relate to the processing method of the high subgrade of a kind of water content.
Background technology
Along with the development of human society, urbanization process is more and more faster, land resources is in short supply all the more, addressing gets more and more in coastal riverine mud soft soil foundation building project along the lake, the project that the discarded object utilizing desilting to renovate carries out reclaiming fields from the sea also is increasing sharply, and the project of soft layer area more than 1,000,000 squares that the high-moisture mud utilizing strand riverine carries out hydraulic reclamation is seen everywhere.The thin Appropriate application completed and combine with making is doulbe-sides' victory way of each local enforcement at present, utilizes thin soil of completing to carry out making ground, can promote beautifying urban environment, improve the synthesized competitiveness in city.Along with the development of Soft Ground branch art, it dredging on consolidation utilize become the new industrial technology in a top.Dredging is enclosed sea and is caused ground object of construction production to be filled with new weak soil in original alluvial sediment soft clay basis blowing up, and to be a class without any consolidation, water content high and the artificial deposit be in a liquid state for this, and its soil property is liquid mud, mud burning into sand and mucky soil.The method is covered on primary weak soil by backfill (hydraulic reclamation) dredging markets, makes place form the obvious soil body and cover the diadactic structure of weak soil of underliing, thus bring new difficulty for the basement process in place.The soft foundation of this kind of engineering ground all exists that water content is high, compressibilty is high, poor permeability, in a short time also can not for building the feature used, must reinforce ground as required before carrying out building engineering construction, to improve the intensity of soft foundation, bearing capacity and stability.
Now traditional method is by arranging the vertical drainage such as plastic draining board or sand drain passage to soft foundation, sand cushion and horizontal pumping channel is laid on surface, and cover diaphragm seal thereon, then adopt vacuum pump to extract gas in film and water out in film place and produce the draught head of about 80kpa, make the water Accelerating Removal in weak soil and then reinforcing flexible foundation.With by several all over high-vacuum densification manufacture " pressure reduction " draining, and Binding number hits close all over suitable change energy, progressively reach the water content reducing the soil body, improve compactness, bearing capacity, reduce ground settlement after construction and relative settlement, but two kinds of methods are all because complexity of constructing causes very high cost.
Summary of the invention
The object of this invention is to provide the method for soft soil foundation, to solve the problems referred to above that prior art exists.
The technical scheme that the present invention takes is as follows:
A kind of pre-buried hydraulic reclamation shakes and rushes flexible foundation treatment method, it is characterized in that the method comprises the following steps:
(1) clearing up and flatten the basis cleaning degree of depth to the terrestrial reference of described subgrade is 0.2-0.5m;
(2) carry out fill around the ground produced step (1) and form embankment, embankment elevation and ground distance are greater than 0.5m, and top is wide is 3m, slope ratio is 1:2 near water, and back slope ratio is 1:3, and inside and outside lattice dike, slope ratio is 1:2, top is wide is 1m, and with bulldozer successively compacting;
(3) on the earth's surface of leveling, initial stressed layer is laid;
(4) on described initial stressed layer, arrange spoil disposal pipeline, the distance of spoil disposal pipeline and embankment toe is 5m, with ground identity distance from being greater than 0.5m;
(5) surveying setting-out is buried level underground in described soil body shallow-layer and to be catchmented pipe special, also be provided with horizontal vacuum pipe, level set water pipe is connected on horizontal vacuum pipe, wherein horizontal vacuum pipe extends at two ends in gutter respectively and is connected on vacuum pump by vertical tube, the vertical tube of the pipeline and link vacuum pump that wherein extend to gutter passes through Valve controlling, also be provided with soakaway trench to be connected by reducing tee, four-way with header, junction adopts pipe collar clamping, and water filtration membrane parcel is carried out on soakaway trench surface;
(6) foundation structure produced above-mentioned steps carries out the process of earth hydraulic reclamation;
(7) the hydraulic reclamation district produced above-mentioned steps uses Buddhist nun's suede flexible hose to carry out benefit silt process;
(8) leveling process is carried out after adopting bulldozer to build end to step (6) silt;
(9) top layer, ground produced above-mentioned steps utilizes the equipment that rushes that shakes to carry out high frequency vibroflotation construction, shakes to rush rolling layer and should determine according to settlement data, soil layer property and basement process standard, is often 3-5 days all over interval time.
Usefulness: the invention provides a kind of simple and easy, cost is low, the construction period is short processing method for subgrade, adopt the pipe laying structure of communication type, the number of vacuum pump can be selected according to different situations, reduce use cost like this, and can not result of use be affected.
Accompanying drawing explanation
Fig. 1 is drainage system floor map of the present invention.
Fig. 2 is schematic diagram of the present invention.
Wherein: 1, cofferdam 2, header 3, soakaway trench 4, valve 5, connect vacuum pump 6, hydraulic reclamation ground 7, gutter.
Specific embodiment
Below in conjunction with Figure of description, the present invention is described further:
A kind of pre-buried hydraulic reclamation shakes and rushes flexible foundation treatment method, it is characterized in that the method comprises the following steps:
(1) clearing up and flatten the basis cleaning degree of depth to the terrestrial reference of described subgrade is 0.2-0.5m;
(2) step (1) is produced which around carry out fill and form embankment, embankment elevation and ground distance are greater than 0.5m, and top is wide is 1m, slope ratio is 1:2 near water, and back slope ratio is 1:3, and inside and outside lattice dike, slope ratio is 1:2, top is wide is 1m, and with bulldozer successively compacting;
(3) on the earth's surface of leveling, initial stressed layer is laid;
(4) on described initial stressed layer, arrange spoil disposal pipeline, the distance of spoil disposal pipeline and embankment toe is 5m, with ground identity distance from being greater than 0.5m;
(5) surveying setting-out is buried level underground in described soil body shallow-layer and to be catchmented pipe special, also be provided with horizontal vacuum pipe, level set water pipe is connected on horizontal vacuum pipe, wherein horizontal vacuum pipe extends at two ends in gutter respectively and is connected on vacuum pump by vertical tube, the vertical tube of the pipeline and link vacuum pump that wherein extend to gutter passes through Valve controlling, also be provided with soakaway trench to be connected by reducing tee, four-way with header, junction adopts pipe collar clamping, and water filtration membrane parcel is carried out on soakaway trench surface;
(6) foundation structure produced above-mentioned steps carries out the process of earth hydraulic reclamation;
(7) the hydraulic reclamation district produced above-mentioned steps uses Buddhist nun's suede flexible hose to carry out benefit silt process;
(8) leveling process is carried out after adopting bulldozer to build end to step (6) silt;
(9) top layer, ground produced above-mentioned steps utilizes the equipment that rushes that shakes to carry out high frequency vibroflotation construction, shakes to rush rolling layer and should determine according to settlement data, soil layer property and basement process standard, is often 3-5 days all over interval time.
What the present invention mainly adopted is that vacuum diversion high frequency vibrating rushes concretion technology, concrete grammar is as follows: according to water force spacing before hydraulic reclamation, bury level underground at soil body shallow-layer to catchment pipe special, the level pipe special that catchments is linked on horizontal vacuum pipeline, horizontal vacuum pipeline extends in the row of gutter respectively at two ends and is connected on vacuum pump by vertical tube, the pipeline extending to gutter all uses Valve controlling with the vertical tube being connected vacuum pump, after hydraulic reclamation completes, gutter Artesian Drainage is first utilized to go out in the soil body after a large amount of free moisture, recycling vacuum pump produces the water of negative pressure extracting inside soil body, utilize the equipment that rushes that shakes to carry out high frequency vibroflotation construction on top layer simultaneously, repeatedly to shake punching according to consolidation width, load bearing requirements is reached with rapidly solidified.
Specifically can be: 1, during hydraulic reclamation, the valve closing of gutter, drainage system does not run.
2, after hydraulic reclamation district hydraulic reclamation stops hydraulic reclamation to predetermined altitude, the water discharging valve of Yield rainfall relation system is opened, and utilizes Action of Gravity Field free-draining.
3, reserve for one's own use draining flow velocity very little after, connect vacuum drainage pump, will flow automatically valve closing, start vacuum pump draining, rush equipment simultaneously carry out vibroflotation construction with high frequency vibrating, and the moisture in the acceleration soil body leaches, and discharges through vacuum drainage pump.
4, after repeatedly vibroflotation construction, the part reaching requirement for bearing capacity is flattened.
5, regional area that is higher to local cohesive soil content, that do not reach requirement for bearing capacity carries out specially treated.
6, larger to hydraulic reclamation area thickness part, adopts the method for layering consolidation, to meet requirement for bearing capacity.
Drainage pipe is laid:
1, basis, hydraulic reclamation district: carry out base process clearly according to designing requirement, then with scarifier, ground is loosened 0.5m-0.6m as pervious layer; Have sludge region to local, soakaway trench, to original soil layer, is buried 50cm to original soil layer by strip off top layer mud.
2, layout design: according to the area in each hydraulic reclamation district and the position in length and width and hydraulic reclamation height and gutter, drainage system is designed, reasonable layout often organizes the area of flowing line institute draining and the length of soakaway trench and spacing, can fast and effeciently catchment and draining to reach.
3, defence line: carry out header position unwrapping wire according to design.
4, pipe laying: utilize chain type pipelayer to carry out pipe laying, soakaway trench is done parcel process by the front water filtration membrane of pipe laying.Header adopts gluing connection.
Above are only specific embodiments of the invention, but design concept of the present invention is not limited thereto, all changes utilizing this design the present invention to be carried out to unsubstantiality, all should belong to the behavior of invading scope.
Claims (8)
1. pre-buried hydraulic reclamation shakes and rushes a flexible foundation treatment method, it is characterized in that the method comprises the following steps:
(1) terrestrial reference of described subgrade is cleared up and flattened;
(2) carry out fill around ground step (1) produced and form embankment;
(3) on the earth's surface of leveling, initial stressed layer is laid;
(4) spoil disposal pipeline is set on described initial stressed layer;
(5) surveying setting-out is buried level underground in described soil body shallow-layer and to be catchmented pipe special;
(6) foundation structure produced above-mentioned steps carries out the process of earth hydraulic reclamation;
(7) the hydraulic reclamation district produced above-mentioned steps uses Buddhist nun's suede flexible hose to carry out benefit silt process;
(8) leveling process is carried out after adopting bulldozer to build end to step (6) silt;
(9) top layer, ground produced above-mentioned steps utilizes the equipment that rushes that shakes to carry out high frequency vibroflotation construction.
2. the pre-buried hydraulic reclamation of one according to claim 1 shakes and rushes flexible foundation treatment method, it is characterized in that, the described basis cleaning degree of depth is 0.2-0.5m.
3. the pre-buried hydraulic reclamation of one according to claim 1 shakes and rushes flexible foundation treatment method, it is characterized in that, described embankment elevation and ground distance are greater than 0.5m, top is wide is 3m, slope ratio is 1:2 near water, and back slope ratio is 1:3, and inside and outside lattice dike, slope ratio is 1:2, top is wide is 1m, and with bulldozer successively compacting.
4. the pre-buried hydraulic reclamation of one according to claim 1 shakes and rushes flexible foundation treatment method, it is characterized in that, described spoil disposal pipeline and the distance of embankment toe are 5m, with ground identity distance from being greater than 0.5m.
5. the pre-buried hydraulic reclamation of one according to claim 1 shakes and rushes flexible foundation treatment method, it is characterized in that, also be provided with horizontal vacuum pipe, described level set water pipe is connected on horizontal vacuum pipe, wherein horizontal vacuum pipe extends at two ends in gutter respectively and is connected on vacuum pump by vertical tube, and the pipeline wherein extending to gutter passes through Valve controlling with the vertical tube being connected vacuum pump.
6. the pre-buried hydraulic reclamation of one according to claim 5 shakes and rushes flexible foundation treatment method, it is characterized in that, is also provided with soakaway trench and is connected by reducing tee, four-way with header, and junction adopts pipe collar clamping, and water filtration membrane parcel is carried out on soakaway trench surface.
7. the pre-buried hydraulic reclamation of one according to claim 1 shakes and rushes flexible foundation treatment method, it is characterized in that shaking described in step (9) is rushed rolling layer and should be determined according to settlement data, soil layer property and basement process standard, and often time interval time is 3-5 days.
8. the pre-buried hydraulic reclamation of one according to claim 1 shakes and rushes flexible foundation treatment method, it is characterized in that, described header adopts PVC drain pipe, and soakaway trench adopts the big pipe of PE, and between soakaway trench, Distance geometry number is determined according to engineering size and soil property character.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410447750.3A CN104234027A (en) | 2014-09-04 | 2014-09-04 | Embedded blow-filled vibroflotation soft foundation processing method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410447750.3A CN104234027A (en) | 2014-09-04 | 2014-09-04 | Embedded blow-filled vibroflotation soft foundation processing method |
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| CN201410447750.3A Pending CN104234027A (en) | 2014-09-04 | 2014-09-04 | Embedded blow-filled vibroflotation soft foundation processing method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104711968A (en) * | 2015-03-23 | 2015-06-17 | 程义吉 | Negative-pressure three-dimensional flow-guiding disturbance impact solidification dredger filling method |
| CN105862676A (en) * | 2015-09-24 | 2016-08-17 | 中交天航港湾建设工程有限公司 | Blow-filling method and structure for controlling difference elevation of mud surface after treatment and unloading of soft foundation |
-
2014
- 2014-09-04 CN CN201410447750.3A patent/CN104234027A/en active Pending
Non-Patent Citations (2)
| Title |
|---|
| 程义吉等: "东营经济技术开发区滨海临港产业区采用预埋吹填振冲软地基处理方法获得成功", 《东营日报》 * |
| 程义吉等: "预埋吹填振冲软地基处理技术", 《黄河网》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104711968A (en) * | 2015-03-23 | 2015-06-17 | 程义吉 | Negative-pressure three-dimensional flow-guiding disturbance impact solidification dredger filling method |
| CN105862676A (en) * | 2015-09-24 | 2016-08-17 | 中交天航港湾建设工程有限公司 | Blow-filling method and structure for controlling difference elevation of mud surface after treatment and unloading of soft foundation |
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Application publication date: 20141224 |