CN102644264A - Method for reinforcing soft soil foundation by adopting soft foundation light tamping mode - Google Patents
Method for reinforcing soft soil foundation by adopting soft foundation light tamping mode Download PDFInfo
- Publication number
- CN102644264A CN102644264A CN2011100389124A CN201110038912A CN102644264A CN 102644264 A CN102644264 A CN 102644264A CN 2011100389124 A CN2011100389124 A CN 2011100389124A CN 201110038912 A CN201110038912 A CN 201110038912A CN 102644264 A CN102644264 A CN 102644264A
- Authority
- CN
- China
- Prior art keywords
- ram
- foundation
- soft
- reinforcing
- soil
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Landscapes
- Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
Abstract
The invention relates to a method for reinforcing a soft soil foundation by adopting a soft foundation light tamping mode, which comprises the following steps of: firstly, paving a permeable layer with the thickness of 20 to 30cm on the surface of a natural foundation; by preset tamping energy and tamping times, enabling foundation soil at a certain depth to be solidified; arranging drainage ditches in both longitudinal and transverse directions at intervals of 10 to 20m and also arranging drainage sumps at the intersections of the drainage ditches so as to timely eliminate accumulated water; after the processing on the natural foundation reaches the requirements, filling earthwork to a preset designed elevation; and paving a permeable layer with the thickness of 20 to 30cm on the surface of the earthwork; and by preset tamping energy and tamping times, compacting the filled layer and enabling soft foundation soil underlaid under the filled layer to be further solidified. Compared with the prior art, the invention provides a novel practical method for processing the soft soil foundation of an industrial building floor; and the method is simple and easy to actually operate and has the obvious advantages on the aspect of economic technical indexes.
Description
Technical field
The present invention relates to field of civil engineering, especially relate to a kind of method that adopts soft base gently to ram reinforcing soft ground.
Background technology
As the important component part of modern industry, China's industrial construction faces the vigorous market demand, especially in the soft clay area of riverine and coastal, especially in fast development.For example logistic storage has special requirement for building ground floor, need satisfy multilayer storing goods shelf ground under full load condition and have good planeness, otherwise may cause the inclination of storing goods shelf or the fluctuation of service of goods fork truck of providing and delivering.Therefore, the Soft Ground of industrial construction terrace is extremely important.
At present the soft-soil foundation treatment method for the industrial construction terrace mainly contains: cushion, surcharge preloading method, mixing pile composite foundation method, ram closely knit method etc.See that with regard to present circumstances every kind of method has pluses and minuses, cushion is convenient feasible, but can only be applicable to the Soft Ground of shallow-layer, handles thickness and should not surpass 2m; The surcharge preloading method is the soft soil foundation settlement issues effectively, but the duration that needs is very long, is unaccommodated for the engineering that construction period is arranged; Cement mixing pile composite foundation reinforcing soft soil effect is obvious, and the construction period is short, but expense height and construction quality are difficult to control.Therefore, at the Yangtze River Delta, area, Pearl River Delta and the deep soft soil layer of other region following the line of the sea extensive development of China, the demand economical rationality, the soft-soil foundation treatment method of quick construction is the technical barrier that restriction logistic storage building ground floor is built.
Based on the characteristics of industrial construction terrace to foundation strength and deformation requirements, the load that this building ground floor bore is also little, in 50kPa, mainly is that particularly inhomogeneous deformation has the higher requirement of ratio to distortion usually.The present invention proposes the characteristics that combine multiple ground to handle means, adopt the foundation treatment mode of double-deck compacting to control soft soil base sedimentation according to terrace load and foundation condition.At natural ground and fill stratum surface one deck pervious layer is set respectively, the existence of two pervious layers has guaranteed the consolidation effect of superficial part soil layer effectively, really can form the crust layer with construction value, plays the effect of stress diffusion.Consolidation effect for each soil layer also has quantitative detection control indexes, and natural ground is mainly through the static sounding curve comparative analysis before and after reinforcing, and is aided with and rams pile penetration; The fill stratum on surface is then controlled through coefficient of consolidation, and the coefficient of consolidation that requires to ram the back fill stratum should satisfy code requirement.Shorten the construction period thereby reach, reduce the purpose of settlement after construction or relative settlement, and can significantly reduce the expense that ground is handled.Therefore, not only have remarkable advantages on the economic and technical norms, and social benefit is also very obvious.
Through the inquiry patent database, do not find to be provided with the patent report that two pervious layers are rammed processing at present as yet.Literature search is found, the method for ramming of vertical drainage plate or sand drain is set, though it is darker to handle the degree of depth, construction costs is obviously higher; And the method for ramming of single pervious layer only is set, because permeable path length is handled the degree of depth and obviously is not so good as two pervious layer modes proposed by the invention with effect; What is more important, the present invention handles natural ground and fill stratum respectively, so just can effectively guarantee the consolidation effect of natural ground, simultaneously ramming consolidation effect and also can be guaranteed for fill stratum.
Summary of the invention
The object of the invention be exactly settlement issues that a kind of effectively soft foundation is provided in order to overcome the defective that above-mentioned prior art exists, simple, economic and reliable be applicable to industrial construction terrace soft foundation dynamic consolidation processing method.
The object of the invention can be realized through following technical scheme:
A kind of method that adopts soft base gently to ram reinforcing soft ground; It is characterized in that; This method may further comprise the steps: lay 20～30cm pervious layer at foundation surface; Through preestablish ram energy and ram that number of times carries out that soft base gently rams, the variable multipass ram that foundation soil is produced is fixed, reach the purpose that significantly improves the shallow soil modulus of compressibility, whenever a gutter is set on the both direction in length and breadth of pervious layer at a distance from 10～20m; Fill cubic metre of earth a height then to predetermined backfill; Lay 20～30cm pervious layer on the surface of banketing at last, through preestablish ram energy and ram that number of times carries out that soft base gently rams, ramming of variable multipass make the fill stratum compacting, and weak foundation soil that it is crouched down is further fixed.
Described pervious layer adopts rubble, coarse sand or building waste to constitute.
The intersection point place in described gutter also can be provided with collecting well.
Also should lay rubble or coarse sand in the described gutter, guarantee moving smoothly of the equipment of ramming.
Described predetermined backfill thickness is 1～1.5m.
The soft base of strong rammer equipment gently rams in order to adopt for ramming of being told, the variable multipass is accomplished.
The described energy of ramming rams to confirm through examination according to reinforcement depth and soil condition, ram reinforce influence the degree of depth can be with reference to the estimation of Maynard (M é nard) formula, the described number of times of ramming is controlled by ramming pile penetration.
Compared with prior art, the present invention has the following advantages:
(1) for the fill stratum individual processing, both can guarantee the consolidation process effect of natural ground soil, can guarantee that again fill stratum reaches certain compactness;
(2) at natural ground and fill stratum surface one deck pervious layer is arranged respectively, the existence of two pervious layers has guaranteed the consolidation effect of superficial part soil layer effectively, really can form the crust layer with construction value, plays the effect of stress diffusion;
(3) consolidation effect of each soil layer has quantitative detection control indexes, and natural ground is mainly through experiment of the load, plate before and after reinforcing or the comparative analysis of static sounding curve, and is aided with and rams pile penetration; The fill stratum on surface is then controlled through coefficient of consolidation, and the coefficient of consolidation that requires to ram the back fill stratum should satisfy code requirement.
Description of drawings
Fig. 1 is a longitudinal plan of the present invention;
Fig. 2 is an A-A sectional drawing of the present invention.
Among the figure, 1 for the surperficial pervious layer that bankets, 2 for fill stratum, 3 for the foundation surface pervious layer, 4 for soft foundation, 5 for soil layer, 6 for gutter, 7 for collecting well.
The specific embodiment
Below in conjunction with accompanying drawing and specific embodiment the present invention is elaborated.
Embodiment
Certain logistics storage building ground floor planar dimension is long 200m, wide 150m, and about ground level 4.30m, the depth of fill is 1.2m, and the thick silt clay of 7～8m is arranged under the foundation soil, the design load that building ground floor bears is 30kPa.Method for processing foundation through proposed by the invention is handled, with bearing capacity and the deformation requirements that satisfies this logistic storage building ground floor.
Foundation treatment mode for this logistic storage building ground floor is specific as follows:
At first carrying out levelling of the land, set the settlement observation reference point, is soft foundation 4 on the top of harder soil layer 5; The hardcore bed of on soft foundation 4, laying 20cm is as foundation surface pervious layer 3; This foundation surface pervious layer 3 be through the building waste suitably handled also can, on the foundation surface pervious layer 3 the simple and easy gutter 6 of spacing 15m excavation traversed by fork (wide 20cm, dark 10cm); 6 infall excavates simple and easy collecting well 7 again in the gutter, so that in time discharge ponding when ramming.Divide and to adopt for three times strong rammer equipment to carry out that soft base gently rams, the compacting of variable multipass, the pile penetration of on average ramming of last time is no more than 5cm, reaches the pile penetration of ramming of design, stops to ram.Fill the thick fill stratum of 1.2m 2 on request, filling the earthwork is the requirement compaction in layers, and the hardcore bed of laying 20cm on the surface of fill stratum 2 at last is as banketing surperficial pervious layer 1; Tamp twice; Average compactness reaches more than 0.9, stops ramming, and its structure is shown in Fig. 1～2.
Employing is provided with the method for processing foundation of two pervious layers; Confirm to ram ability and ram end condition according to the actual conditions and the geological conditions of engineering simultaneously; Ramming energy rams to confirm through examination according to reinforcement depth and soil condition; Ram reinforce influence the degree of depth can be with reference to the estimation of Maynard (M é nard) formula, ram number of times and control and can reach satisfied effect by ramming pile penetration.The present invention has good economic benefits and application prospect for the Soft Ground of industrial construction terrace provides new practical approach.
Claims (6)
1. method that adopts soft base gently to ram reinforcing soft ground; It is characterized in that; This method may further comprise the steps: lay 20～30cm pervious layer at foundation surface; Ram energy and ram number of times and ram that foundation soil is produced is fixed through preestablishing, whenever a gutter is set on the both direction in length and breadth of pervious layer, fill a cubic metre of earth height of extremely being scheduled to backfill then at a distance from 10～20m; Lay 20～30cm pervious layer on the surface of banketing at last, ram energy and ram number of times and ram and make the fill stratum compacting get final product through preestablishing.
2. a kind of method that adopts soft base gently to ram reinforcing soft ground according to claim 1 is characterized in that, described pervious layer adopts rubble, coarse sand or building waste to constitute.
3. a kind of method that adopts soft base gently to ram reinforcing soft ground according to claim 1 is characterized in that the intersection point place in described gutter also can be provided with collecting well.
4. a kind of method that adopts soft base gently to ram reinforcing soft ground according to claim 1 is characterized in that, can lay rubble or coarse sand in the described gutter.
5. a kind of method that adopts soft base gently to ram reinforcing soft ground according to claim 1 is characterized in that the height of described predetermined backfill is 1～1.5m.
6. a kind of method that adopts soft base gently to ram reinforcing soft ground according to claim 1; It is characterized in that; The described energy of ramming carries out through strong rammer equipment according to reinforcement depth and soil condition that soft base gently rams, the examination of variable multipass rams to confirm; Ram reinforce influence the degree of depth can be with reference to the estimation of Maynard (M é nard) formula, the described number of times of ramming is controlled by ramming pile penetration.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110038912.4A CN102644264B (en) | 2011-02-16 | 2011-02-16 | Method for reinforcing soft soil foundation by adopting soft foundation light tamping mode |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110038912.4A CN102644264B (en) | 2011-02-16 | 2011-02-16 | Method for reinforcing soft soil foundation by adopting soft foundation light tamping mode |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102644264A true CN102644264A (en) | 2012-08-22 |
| CN102644264B CN102644264B (en) | 2014-07-16 |
Family
ID=46657327
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201110038912.4A Expired - Fee Related CN102644264B (en) | 2011-02-16 | 2011-02-16 | Method for reinforcing soft soil foundation by adopting soft foundation light tamping mode |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102644264B (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104234067A (en) * | 2014-10-08 | 2014-12-24 | 潘林有 | Method for treating coast weak soil unconsolidated soil |
| CN104674782A (en) * | 2014-11-04 | 2015-06-03 | 郑鲁平 | Foundation processing method based on sand well dynamic compaction composition of muddy soft soil |
| CN104988821A (en) * | 2015-06-17 | 2015-10-21 | 成都科创佳思科技有限公司 | Road drainage structure |
| CN106049406A (en) * | 2016-06-01 | 2016-10-26 | 上海建研地基基础工程有限公司 | Method for lightly tampering lime soil foundation |
| CN112359856A (en) * | 2020-11-05 | 2021-02-12 | 潍坊弘润新材料有限公司 | Gravity flow method hydraulic filling type foundation treatment construction process |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100721225B1 (en) * | 2006-02-23 | 2007-05-23 | 지호열 | Drainage structure for soft ground treatment and dehydration method |
| CN101021068A (en) * | 2007-03-09 | 2007-08-22 | 包国建 | Low-level prepressing drainage dynamic consolidating soft soil foundation processing method |
-
2011
- 2011-02-16 CN CN201110038912.4A patent/CN102644264B/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100721225B1 (en) * | 2006-02-23 | 2007-05-23 | 지호열 | Drainage structure for soft ground treatment and dehydration method |
| CN101021068A (en) * | 2007-03-09 | 2007-08-22 | 包国建 | Low-level prepressing drainage dynamic consolidating soft soil foundation processing method |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104234067A (en) * | 2014-10-08 | 2014-12-24 | 潘林有 | Method for treating coast weak soil unconsolidated soil |
| CN104674782A (en) * | 2014-11-04 | 2015-06-03 | 郑鲁平 | Foundation processing method based on sand well dynamic compaction composition of muddy soft soil |
| CN104988821A (en) * | 2015-06-17 | 2015-10-21 | 成都科创佳思科技有限公司 | Road drainage structure |
| CN106049406A (en) * | 2016-06-01 | 2016-10-26 | 上海建研地基基础工程有限公司 | Method for lightly tampering lime soil foundation |
| CN112359856A (en) * | 2020-11-05 | 2021-02-12 | 潍坊弘润新材料有限公司 | Gravity flow method hydraulic filling type foundation treatment construction process |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102644264B (en) | 2014-07-16 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102296615B (en) | Complex deep foundation pit stepped combined supporting method of under condition of soft soil foundation | |
| CN103758113B (en) | A kind of grid encloses the anti-liquefied foundation reinforcement means of hoop | |
| CN106567379B (en) | Method for reinforcing manual dewatering, bedding course, low-energy replacement dynamic compaction shallow foundation | |
| CN102561132B (en) | Plate supporting type embankment structure for post-construction settlement controlling of deep soft soil foundation on high-grade highway | |
| CN102644264B (en) | Method for reinforcing soft soil foundation by adopting soft foundation light tamping mode | |
| CN204370473U (en) | Precast module type panel Fill Reinforced With Geogrids CHARACTERISTICS OF TAILINGS SAND barricade | |
| Pakbaz et al. | Characteristics of diaphragm wall lateral deformations and ground surface settlements: Case study in Iran-Ahwaz metro | |
| CN104894937A (en) | Construction method for mucky soft soil roadbase tubular pile | |
| CN107447778A (en) | The heightening and consolidation structure and method of a kind of in-service reinforced concrete retaining wall | |
| CN103510504B (en) | High saturated uneven reclaimed ground processing method | |
| CN104947560A (en) | Pile-net composite roadbed pile top differential settlement control method | |
| CN103074882A (en) | Construction method for reinforcing island-type perennial frozen-soil foundation by adopting gravel piles | |
| CN110761264A (en) | Secondary dynamic compaction gravel replacement and reinforcement method for coastal sludge soft soil foundation | |
| CN101591903A (en) | Method for processing long-pile short-pier composite foundation | |
| CN106894432A (en) | A kind of pile variation rigidity reinforcement cushion composite foundation and its construction method | |
| CN202865855U (en) | Stabilizing plate type anchoring pile retaining structure | |
| CN207331740U (en) | A kind of heightening and consolidation structure of in-service reinforced concrete retaining wall | |
| CN112989460A (en) | Subgrade settlement calculation method caused by subgrade construction and operation in soft soil area | |
| CN104695419A (en) | Soft soil roadbed construction method | |
| CN104818658B (en) | Road widening method for collapsible yellow earth foundation layer | |
| CN207525567U (en) | A kind of pile plate composite structure suitable for Steep Slope Embankment | |
| CN106958239A (en) | Precipitation union gently rams soft soil foundation reinforcing method | |
| CN101591906A (en) | The method for processing foundation of intubate, multipass vacuum well-point dewatering dynamic consolidation | |
| CN206800092U (en) | The soft base combined type of coastal tidal, which is changed, fills out structure and Roadbed by offshore soft clay | |
| CN102493485A (en) | Method for building slope protection retaining wall during filling |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140716 Termination date: 20180216 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |