CN102168430A - Method for reducing soil pressure on retaining wall in expansive rock-soil area - Google Patents
Method for reducing soil pressure on retaining wall in expansive rock-soil area Download PDFInfo
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- CN102168430A CN102168430A CN 201110064448 CN201110064448A CN102168430A CN 102168430 A CN102168430 A CN 102168430A CN 201110064448 CN201110064448 CN 201110064448 CN 201110064448 A CN201110064448 A CN 201110064448A CN 102168430 A CN102168430 A CN 102168430A
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Abstract
The invention relates to a method for reducing a soil pressure on a retaining wall in an expansive rock-soil area. In the method, expansive rock-soil excavated during construction is filled into soil engineering bags directly, and the soil engineering bags are stacked in the rear of the retaining wall in a staggered mode and are ground fully to form a buffer layer for reducing the soil pressure in the rear of the wall. The method is based on a principle that after the expansive rock-soil in the soil engineering bags meets water to expand, the bags are stretched to form tension which can restrain the dilatational strain of the expansive rock-soil and forms the large additional cohesive force in the expansive rock-soil, so that the bagged expansive rock-soil has a very high strength. Therefore, the soil engineering bags serving as the buffer layer can restrain the dilatational strain of the soil in the rear of the wall and also can be used a support structure to bear part of soil pressure so as to reduce the pressure of the expansive rock-soil on the retaining wall effectively, and the pressured can be reduced by about 30 to 50 percent, so the buffer effect exceeds that of the conventional buffer material. The method has the advantages that: the construction speed is high; the cost is saved; land resources are not damaged; and the like.
Description
One, technical field
The invention belongs to a kind of utilize swelled rock and soil geotechnique bag as wall when building retaining wall in swelled rock and soil area after padded coaming, to reduce the method for Earth Pressure on Retaining Wall.
Two, background technology
Swelled rock and soil is a kind of fissurity that has, the high-ductility soil of swell-shrink characteristic and overconsolidation, and its volumetric change is subjected to the control of moisture content, as: when meeting water, soil expansion; During dehydration, the soil body shrinks.When the swelled rock and soil water-swellable, if dilatancy is subjected to the constraint of object, then swelled rock and soil is just to quite high expansion outward thrust of constrained body effect.Hence one can see that; the retaining wall that is built in the swelled rock and soil area not only will bear the soil pressure on the conventional meaning; also to bear the bulbs of pressure that the swelled rock and soil dilatancy is tied and produces; therefore, the retaining wall in swelled rock and soil area occurs cutting off, topples and mode of failure such as sliding deformation is excessive through regular meeting.For reducing Earth Pressure on Retaining Wall, many engineers propose to be provided with the method for certain thickness non-expansibility material as cushion coat behind retaining wall, as adopting rubble, gravel, cohesive soil.In recent years, along with the develop rapidly of geosynthetics, the someone has proposed to adopt geotechnological foamed material (EPS) as cushioning layer material, acts in the retaining wall engineering in swelled rock and soil area.Yet, material in suitable engineerings such as swelled rock and soil area famine rubble, sand gravel, non-expansibility cohesive soils, and EPS usually again can't site prefabrication, its regular shape also can't flexible adaptation engineering complexity landform and border condition, caused the difficulty of constructing in the engineering and the raising of cost.Therefore, for reducing engineering cost, improve efficiency of construction, and reduce destruction, need badly and seek a kind of new cushion coat packing material other regional land resources.
Three, summary of the invention
Technical problem to be solved by this invention provides a kind of method that reduces swelled rock and soil area Earth Pressure on Retaining Wall.
The present invention reduces to act on soil pressure on the swelled rock and soil retaining wall with following technical scheme, and the principal character of this technical scheme is to adopt swelled rock and soil geotechnique bag as the cushion coat packing material, now is described below:
A kind of method that reduces swelled rock and soil area Earth Pressure on Retaining Wall is characterized in that adopting swelled rock and soil geotechnique bag 2 as cushioning layer material in retaining wall 1 back, and to reduce to act on the expansive rock soil pressure on the retaining wall 1, the construction sequence of this method is as follows:
A excavates ground, and the swelled rock and soil of excavation is packed into behind the geotechnique bag, forms swelled rock and soil geotechnique bag 2 with the good sack of rope colligation, and is stand-by;
B carries out retaining wall 1 construction according to the concrete retaining wall construction sequence, treats stripping after retaining wall 1 moulding, and retaining wall 1 is maintained;
C is staggered 1 ~ 2 row swelled rock and soil geotechnique bag of laying in retaining wall (1) back, adopt during swelled rock and soil geotechnique's bag (2) construction and successively stack, the mode that successively rolls, adopt rolling compaction machine that swelled rock and soil geotechnique's bag (2) is rolled into tabular, until the grinding compacting degree 1.5-2.0g/cm that reaches designing requirement
3
D to the 1m height, rolls processing at retaining wall (1) back backfill swelled rock and soil (3) then after swelled rock and soil geotechnique's bag (2) laying highly reaches 1m;
E continues to fill height to retaining wall (1) according to the same manner of step c-d.
At the geotechnique's bag described in the step a is woven bag, is made by admixture 1% ageing-resistant polypropylene material, and planar dimension is at 75cm * 50cm or 100cm * 100cm.
The described method of swelled rock and soil area Earth Pressure on Retaining Wall that reduces is in swelled rock and soil local highway and railway retaining wall application in engineering.
The described method of swelled rock and soil area Earth Pressure on Retaining Wall that reduces is in river course, swelled rock and soil area, slope treatment retaining wall application in engineering.
Described geotechnique's bag 2 is the geotechnological woven bag of interior dress swelled rock and soil, and planar dimension is 75cm * 50cm to 100cm * 100cm.Every laying one deck all should roll, and makes geotechnique's bag 2 be stable tabular, sack tension force be effectively played; A geotechnique bag cushion coat columns should be classified as suitablely with 1 ~ 2 behind the retaining wall, and geotechnique's bag 2 is staggered between the levels when placement in layers.After adopting this method to handle, the swelled rock and soil pressure on the concrete retaining wall can be reduced to act on effectively, 30% ~ 50% soil pressure can be reduced usually.
Principle of the present invention is as follows: (1) utilizes the tension force of geotechnique's bag to suppress the dilatancy of swelled rock and soil in the bag, and then reduces the expansion force of swelled rock and soil to retaining wall.(2) utilize the strong seepage of water of swelled rock and soil geotechnique bag cushion coat, accelerate the drainage rates in the swelled rock and soil behind the retaining wall, thereby reduce the dilatancy that swelled rock and soil fully soaks and produces.(3) utilize the underwater stability of swelled rock and soil geotechnique bag apparently higher than other material.(4) geotechnique's bag itself can be born demi-inflation ground pressure as a kind of flexible retaining soil material.(5) swelled rock and soil geotechnique bag has compressibility, and the lateral compression distortion by geotechnique's bag can reduce the expansion force that the swelled rock and soil distortion suffers restraints and produces;
The present invention compares with traditional swelled rock and soil barricade cushion coat, has following advantage:
1. the present invention can make full use of the disadvantageous swelled rock and soil of retaining wall by swelled rock and soil is packed as cushioning layer material, accomplishes ' converting enemies into friends '.
2. the present invention utilizes swelled rock and soil geotechnique bag, has replaced the material of traditional non-expansive soil stone materials such as sand gravel as the retaining wall cushion coat, can gather materials on the spot, and reduces construction costs, reduces the destruction that land resources is caused.
3. the present invention is obvious to the more traditional method of the effect that reduces Earth Pressure on Retaining Wall, adopt this method can reduce 30% ~ 50% swelled rock and soil pressure, and traditional method can only reach between 20% ~ 30%.
4. geotechnique's bag is flexible retaining soil material among the present invention, can bear part retaining soil pressure, and its quick construction, and is convenient, can adapt to various complex-terrains, reduction of erection time effectively.
Four, description of drawings
Fig. 1 reduces the schematic diagram of retaining wall pressure as cushion coat with swelled rock and soil geotechnique bag
Reference numeral: 1, concrete retaining wall; 2, swelled rock and soil geotechnique bag; 3, backfill swelled rock and soil
Five, the specific embodiment
The inventive method mainly provides a kind of method that reduces the swelled rock and soil Earth Pressure on Retaining Wall, utilize the cushioning layer material of swelled rock and soil geotechnique bag as retaining wall, the swelled rock and soil that is about to excavate out in engineering construction ground is directly packed in the geotechnique bag, after being deposited in retaining wall according to certain arrangement mode, adopt rolling apparatus successively to roll geotechnique's bag, make it closely knit, thereby form the cushion coat of swelled rock and soil retaining wall.
The specific implementation process that embodiment 1. geotechnique's bag cushion coats are provided with:
1) the engineering construction ground of delimiting in the swelled rock and soil area, according to design retaining wall height is 4m, then at first side slope or ground behind the design retaining wall are excavated, the swelled rock and soil 3 that excavates out packed into to be of a size of in the geotechnological woven bag of 75cm * 50cm, and it is stand-by to form swelled rock and soil geotechnique bag 2 behind the good sack of colligation;
2) the poured in place concrete retaining wall 1, treat concrete retaining wall 1 moulding after, adopt the soil layer excavation face of the smooth retaining wall 1 back 1m ~ 2m of rolling compaction machine, make it become the work plane that is suitable for constructing;
3) swelled rock and soil geotechnique bag 2 is winched to work plane, arrange swelled rock and soil geotechnique bag 2 along the retaining wall length direction by the arrangement mode that staggers, two row swelled rock and soils geotechnique bag 2 is set behind retaining wall 1 wall, swelled rock and soil geotechnique bag 2 adopts successively to be laid, the form of construction work that successively rolls, swelled rock and soil geotechnique bag 2 is rolled into tabular, until the grinding compacting degree 1.5-2.0g/cm that reaches designing requirement
3Till;
4) when retaining wall 1 back swelled rock and soil geotechnique bag 2 layings highly reach 1m, to geotechnique's bag cushion coat laying height, take grinding compacting to handle to it at swelled rock and soil retaining wall 1 back backfill excavation swelled rock and soil soil 3 then, compactness is 1.5-2.0g/cm
3
5) according to step 3,4 same quadrat method is successively constructed, and reaches the retaining wall top until filled height.
Claims (4)
1. method that reduces swelled rock and soil area Earth Pressure on Retaining Wall, it is characterized in that adopting swelled rock and soil geotechnique's bag (2) as cushioning layer material in retaining wall (1) back, to reduce to act on the swelled rock and soil pressure on the retaining wall (1), the construction sequence of this method is as follows:
(a) excavation ground is packed the swelled rock and soil of excavation behind the geotechnique bag into, forms swelled rock and soil geotechnique's bag (2) with the good sack of rope colligation, and is stand-by;
(b) carry out retaining wall (1) construction according to the concrete retaining wall construction sequence, treat stripping after retaining wall (1) moulding, retaining wall (1) is maintained;
(c) staggered 1 ~ 2 row swelled rock and soil geotechnique bag of laying in retaining wall (1) back, adopt during swelled rock and soil geotechnique's bag (2) construction and successively stack, the mode that successively rolls, adopt rolling compaction machine that swelled rock and soil geotechnique's bag (2) is rolled into tabular, until the grinding compacting degree 1.5-2.0g/cm that reaches designing requirement
3
(d) after swelled rock and soil geotechnique's bag (2) laying highly reaches 1m, to the 1m height, roll processing then at retaining wall (1) back backfill swelled rock and soil (3);
(e) continue to fill height according to the same manner of step c-d to retaining wall (1).
2. a kind of method that reduces swelled rock and soil area Earth Pressure on Retaining Wall according to claim 1, it is characterized in that being woven bag at the geotechnique's bag described in the step (a), made by admixture 1% ageing-resistant polypropylene material, planar dimension is at 75cm * 50cm or 100cm * 100cm.
3. the method for swelled rock and soil area Earth Pressure on Retaining Wall that reduces as claimed in claim 1 is in swelled rock and soil local highway and railway retaining wall application in engineering.
4. the method for swelled rock and soil area Earth Pressure on Retaining Wall that reduces as claimed in claim 1 is in river course, swelled rock and soil area, slope treatment retaining wall application in engineering.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011100644486A CN102168430B (en) | 2011-03-17 | 2011-03-17 | Method for reducing soil pressure on retaining wall in expansive rock-soil area |
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| CN2011100644486A CN102168430B (en) | 2011-03-17 | 2011-03-17 | Method for reducing soil pressure on retaining wall in expansive rock-soil area |
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| CN102168430A true CN102168430A (en) | 2011-08-31 |
| CN102168430B CN102168430B (en) | 2012-06-27 |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103088834A (en) * | 2013-02-01 | 2013-05-08 | 河海大学 | Method for improving slope stability of expansive soil and controlling structural damage of expansive soil |
| CN105804101A (en) * | 2016-05-16 | 2016-07-27 | 陈静波 | Load-reducing retaining system capable of reducing stress of retaining structure, construction method and applications |
| CN107237230A (en) * | 2017-08-01 | 2017-10-10 | 四川睿铁科技有限责任公司 | A kind of swelled ground（Rock）Subgrade support retainer subtracts swollen structure and its construction method |
| CN108708393A (en) * | 2018-06-04 | 2018-10-26 | 广东工业大学 | A kind of Vibrant buffer layer of retaining wall |
| CN111622236A (en) * | 2020-04-23 | 2020-09-04 | 东南大学 | Expansive rock side slope retaining wall Inclusion structure and arrangement method thereof |
| CN113567268A (en) * | 2021-06-18 | 2021-10-29 | 太原理工大学 | Shear-damage-resistant geotextile bag and shear-resistant method thereof |
| CN114775681A (en) * | 2022-04-15 | 2022-07-22 | 南京工业大学 | Retaining wall anti-seismic device with layered water bag and application method thereof |
| CN115162403A (en) * | 2022-07-06 | 2022-10-11 | 同济大学 | Light high-energy-consumption rockfall protection geotextile bag cushion layer and construction method thereof |
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| CN1865603A (en) * | 2006-06-09 | 2006-11-22 | 郧县三强建筑有限责任公司 | Governing method for swelling clay slope and land slide zone |
| KR100756680B1 (en) * | 2006-05-01 | 2007-09-07 | 주식회사 도화종합기술공사 | Wall using precast concrete building material and construction method therefor |
| CN101538863A (en) * | 2009-03-25 | 2009-09-23 | 贵州省交通规划勘察设计研究院 | Method and structure for constructing permanent soil-nailed retaining wall by woven fabric bags filled with soil |
-
2011
- 2011-03-17 CN CN2011100644486A patent/CN102168430B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| KR100756680B1 (en) * | 2006-05-01 | 2007-09-07 | 주식회사 도화종합기술공사 | Wall using precast concrete building material and construction method therefor |
| CN1865603A (en) * | 2006-06-09 | 2006-11-22 | 郧县三强建筑有限责任公司 | Governing method for swelling clay slope and land slide zone |
| CN101538863A (en) * | 2009-03-25 | 2009-09-23 | 贵州省交通规划勘察设计研究院 | Method and structure for constructing permanent soil-nailed retaining wall by woven fabric bags filled with soil |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103088834A (en) * | 2013-02-01 | 2013-05-08 | 河海大学 | Method for improving slope stability of expansive soil and controlling structural damage of expansive soil |
| CN105804101A (en) * | 2016-05-16 | 2016-07-27 | 陈静波 | Load-reducing retaining system capable of reducing stress of retaining structure, construction method and applications |
| CN107237230A (en) * | 2017-08-01 | 2017-10-10 | 四川睿铁科技有限责任公司 | A kind of swelled ground（Rock）Subgrade support retainer subtracts swollen structure and its construction method |
| CN108708393A (en) * | 2018-06-04 | 2018-10-26 | 广东工业大学 | A kind of Vibrant buffer layer of retaining wall |
| CN111622236A (en) * | 2020-04-23 | 2020-09-04 | 东南大学 | Expansive rock side slope retaining wall Inclusion structure and arrangement method thereof |
| CN113567268A (en) * | 2021-06-18 | 2021-10-29 | 太原理工大学 | Shear-damage-resistant geotextile bag and shear-resistant method thereof |
| CN114775681A (en) * | 2022-04-15 | 2022-07-22 | 南京工业大学 | Retaining wall anti-seismic device with layered water bag and application method thereof |
| CN114775681B (en) * | 2022-04-15 | 2023-06-13 | 南京工业大学 | Retaining wall anti-seismic device with layered water bags and application method thereof |
| CN115162403A (en) * | 2022-07-06 | 2022-10-11 | 同济大学 | Light high-energy-consumption rockfall protection geotextile bag cushion layer and construction method thereof |
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| CN102168430B (en) | 2012-06-27 |
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