CN101713164A - Method for processing udoll foundation - Google Patents
Method for processing udoll foundation Download PDFInfo
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- CN101713164A CN101713164A CN200910228042A CN200910228042A CN101713164A CN 101713164 A CN101713164 A CN 101713164A CN 200910228042 A CN200910228042 A CN 200910228042A CN 200910228042 A CN200910228042 A CN 200910228042A CN 101713164 A CN101713164 A CN 101713164A
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Abstract
The invention provides a method for processing an udoll foundation, which comprises the following steps: (1) removing silty clay and sequentially paving bamboo fences, vitex basketry and warp-knitted terylene composite geotextile; (2) paving 50 to 80 centimeters of hill-skill soil on the warp-knitted terylene composite geotextile, covering the warp-knitted terylene composite geotextile on the top surface of the hill-skill soil, anchoring the warp-knitted terylene composite geotextile and the hill-skill soil in 2 meters, and performing packing to form an overall 'hard-shell layer'; (3) paving a bidirectional polypropylene geogrid on the hill-skill soil and filling 50 to 100 centimeters of hill-skill soil on the bidirectional polypropylene geogrid; and (4) performing rolling. The method is simple and easy to implement, low in cost and short in construction period.
Description
Technical field
The invention relates to method for processing foundation,, relate in particular to the higher Udoll Measures for Making Ground and Foundation method of a kind of water content.
Background technology
Coastal region roadbed major part is salt pan, fish pond, shrimp pond; irrigation canals and ditches are (fortune salt old course) in length and breadth; because of subsiding belt, Plain and decanting zone, the Bohai Sea mainly show as the marine plain that dashes that the alluvial plain of Ziyahe River water system and apron, wave cause, the geology soil layer is mainly silt clay, silty clay on landforms.Bearing capacity of foundation soil is low, and gain in strength is slow, and yielding and inhomogeneous after the loading, rate of deformation is big and stabilization time is long, has that permeability is little, thixotropy and big characteristics of rheological characteristic.In view of the sludge soft bearing capacity of foundation soil is low, compressibilty is big, and bad hydraulic permeability is difficult for satisfying the requirement of ground Design of Bearing Capacity.Utilize traditional soft base processing method, after desilting is finished, substrate soil property water content is big, bearing capacity of foundation soil is lower, directly change and fill out better densification characteristic soil, formation roadbed bullet is soft, sedimentation is big, uses processing methods such as pile foundation method, soil replacement method, grouting, consolidation, reinforcement method, cost is bigger, and the cycle is long.
Summary of the invention
The objective of the invention is to overcome the deficiencies in the prior art, provide a kind of simple and easy to do than traditional soft base processing method, cost is low, the Udoll Measures for Making Ground and Foundation method that the construction period is short.
Wet and soft earth foundation processing method of the present invention is characterized in that, has following steps:
(1) removes silt clay, lay bamboo basketry, chaste tree fragrant plant, warp-knitting polyester composite earthwork cloth successively; Described bamboo basketry, chaste tree fragrant plant tie with iron wire, and overlap joint is not less than 15cm, and the overlap joint of warp-knitting polyester composite earthwork cloth is not less than 15cm;
(2) making 50～80cm mountain skin soil on the warp-knitting polyester composite earthwork cloth of step (1), the warp-knitting polyester composite earthwork cloth is wrapped up in anchoring 2m in mountain skin soil end face anti-package, and filler forms integral body " crust layer ";
(3) on the skin soil of the mountain of step (2), lay two-way polypropylene geo-grid, fill 50～100cm mountain skin soil on it; Will firmly connect between the described two-way polypropylene geo-grid, must not be lower than material design tensile strength in the intensity that is subjected to the force direction junction, and its superimposed length should be less than 15cm;
(4) roll.
The removing silt clay of described step (1) with dig to farinose argillic horizon be principle; The desilting degree of depth in highway section is 30 centimetres to 1 meter.
The chaste tree basketry that described step (1) is laid is 1～2 layer, and described warp-knitting polyester composite earthwork cloth adopts and manually makes.
The bamboo basketry of described step (1) is 1m * 2m, and bamboo bar horizontal spacing is 30cm, and longitudinal pitch is 5cm; Described chaste tree basketry is 1.2m * 2.4m, and the transverse and longitudinal spacing is 2cm; Described warp-knitting polyester composite earthwork cloth is bidirectional stretch intensity 〉=40KM/m, elongation rate≤13%, cloth weight 〉=300g, CBR bursting strength 〉=800N; Described two-way polypropylene geo-grid is hot strength 〉=30KN, elongation per unit length≤13%.
The mountain skin soil of described step (2), step (3) making be rubble content greater than 70%, maximum particle diameter is no more than 30cm; Full section fills.
Described step (4) adopts light-duty road roller to roll, and load is 10～12 tons, rolls 6～8 times, does not have obvious wheelmark and gets final product.
Described light-duty road roller is a vibratory roller.
The invention has the beneficial effects as follows provide a kind of simple and easy to do, cost is low, the construction period short for Udoll Measures for Making Ground and Foundation methods such as mud.
Description of drawings
Fig. 1 is a structural representation of the present invention;
Fig. 2 is that the warp-knitting polyester composite earthwork cloth is wrapped up in the anchor structure schematic diagram in mountain skin soil end face anti-package.
Description of reference numerals is as follows:
1---bamboo basketry 2---chaste tree fragrant plant
3---warp-knitting polyester composite earthwork cloth 4---mountain skin soil
5---two-way polypropylene geo-grid
The specific embodiment
Below in conjunction with accompanying drawing the present invention is further described.
For waterlogged situation, need carry out necessary precipitation and handle, at excavation gutter, roadbed both sides, collecting well, concentrated water pump extracts.
At first desilting: dig to farinose argillic horizon be principle, the desilting degree of depth is generally about about 30 centimetres to 1 meter.
After treating desilting bottom surface airing leveling,,, lay one deck bamboo basketry 1 earlier according to shown in Figure 1 guaranteeing under the smooth situation in ground, 1～2 layer of chaste tree basketry 2 of making on bamboo basketry 1 again, bamboo basketry, chaste tree fragrant plant tie with iron wire, and overlap joint is not less than 15cm.Making one deck warp-knitting polyester composite earthwork cloth 3 on chaste tree basketry 2, the warp-knitting polyester composite earthwork cloth adopts and manually makes, and its overlap joint is not less than 15cm.Fill mountain skin soil 4 on warp-knitting polyester composite earthwork cloth 3, the thickness of mountain skin soil 4 is by 50～80cm control, is best with 80cm in the practice.The mountain skin soil that fills requires rubble content greater than 70%, and maximum particle diameter is no more than 30cm: full section fills.Warp-knitting polyester composite earthwork cloth 3 is wrapped up in anchoring 2m in mountain skin soil 4 end face anti-packages.So-called " anti-package is wrapped up in anchoring 2m " is meant that the mountain skin soil 4 that the warp-knitting polyester composite earthwork cloth is filled on 3 along its wraps up mountain skin soil 4, warp-knitting polyester composite earthwork cloth 3 behind the parcel is 2m at the end face folding width of mountain skin soil 4, plays anchoring (referring to Fig. 2).Filler forms integral body " crust layer ".
The two-way polypropylene geo-grid 5 of making one deck on mountain skin soil 4, so-called " two-way polypropylene geo-grid " are meant that geo-grid itself all bears pulling force along the horizontal and vertical both direction of its axis.Connection between the two-way polypropylene geo-grid should be firm, must not be lower than material design tensile strength in the intensity that is subjected to the force direction junction, and its superimposed length should do not filled 50～100cm mountain skin soil less than 15cm on two-way polypropylene geo-grid 5.
Use light-duty road roller to roll then, load is 10～12 tons, and preferred vibratory roller rolls 6～8 times, does not have obvious wheelmark and gets final product.
After adopting said method that Udoll is handled, all the other operations are carried out construction processing according to conventional methods.
Concrete construction process is: desilting → airing leveling → elevation desilting ground detection → making bamboo basketry, chaste tree basketry, warp-knitting polyester composite earthwork cloth → making mountain skin soil → compacting, survey elevation, the two-way polypropylene geo-grid of differential settlement → laying → fill 50cm mountain skin soil.
The advantage of job practices of the present invention is: filler forms integral body " crust layer ", and bearing capacity of foundation soil improves greatly relatively, and sedimentation is less, the construction material abundance, and cost is low, short construction period, job practices is easy, and quality is easy to control.Because crust layer and geotextile iso-stress diffusion form support subgrade structure layer.
Geotechnique's material requirements:
1, bamboo basketry: 1m * 2m, bamboo bar horizontal spacing is 30cm, longitudinal pitch is 5cm.
2, chaste tree basketry: 1.2m * 2.4m, the transverse and longitudinal spacing is 2cm.
3, warp-knitting polyester composite earthwork cloth: bidirectional stretch intensity 〉=40KM/m, elongation rate≤13%, cloth weight 〉=300g, CBR bursting strength 〉=800N.[CBR is the abbreviation of the California Bearing Ratio, expression load-carry duty (ratio)]
4, two-way polypropylene geo-grid: hot strength 〉=30KN, elongation per unit length≤13%.
Be the construction cost of the present invention and prior art and the comparison in man-hour below.
The roadbed in same location also has the employing high-pressure rotary jet grouting pile to construct, and pile spacing is generally 1.5m, and stake is long to be 10cm, and every linear meter(lin.m.) uses common 425
#Portland cement 200kg amounts to 76 yuan in name coin, artificial and 45 yuan/linear meter(lin.m.) of machinery, and every mechnisiam 0m/ machine-team (8 hours), as the wide 15m of roadbed, the long 15m of roadbed needs 121 of piling altogether, and cost is (76+45) * 121 * 10=146410 unit; Can only arrange two stake machines by this area, the engineering time needs 121 * 10/70 * 2=8.6 machine-team (8 hours) altogether.
Change and do processing method of the present invention: 8 yuan/m of bamboo fragrant plant
2, 7 yuan/m of chaste tree fragrant plant
2, 9 yuan/m of warp-knitting polyester composite earthwork cloth
2, 7 yuan/m of geo-grid
2, be total to 225m
2* (7+6+8)=5400 yuan (comprising artificial); 90 yuan/m of mountain skin soil
3, need mountain skin soil (0.8+0.5) * 225 * 90=26325 unit; Cost accounting is a name coin 26325+5400=31725 unit; 1 hour engineering time can finish.
By above comparison, the beneficial effect of wet and soft earth foundation processing method of the present invention obviously as seen, and the construction extremely easy.
Claims (7)
1. wet and soft earth foundation processing method is characterized in that having following steps:
(1) removes silt clay, lay bamboo basketry, chaste tree fragrant plant, warp-knitting polyester composite earthwork cloth successively; Described bamboo basketry, chaste tree fragrant plant tie with iron wire, and overlap joint is not less than 15cm, and the overlap joint of warp-knitting polyester composite earthwork cloth is not less than 15cm;
(2) making 50～80cm mountain skin soil on the warp-knitting polyester composite earthwork cloth of step (1), the warp-knitting polyester composite earthwork cloth is wrapped up in anchoring 2m in mountain skin soil end face anti-package, and filler forms integral body " crust layer ";
(3) on the skin soil of the mountain of step (2), lay two-way polypropylene geo-grid, fill 50～100cm mountain skin soil on it; Will firmly connect between the described two-way polypropylene geo-grid, must not be lower than material design tensile strength in the intensity that is subjected to the force direction junction, and its superimposed length should be less than 15cm;
(4) roll.
2. according to the wet and soft earth foundation processing method of claim 1, it is characterized in that, the removing silt clay of described step (1) with dig to farinose argillic horizon be principle, the desilting degree of depth in highway section is 30 centimetres to 1 meter.
3. according to the wet and soft earth foundation processing method of claim 1, it is characterized in that the chaste tree basketry that described step (1) is laid is 1～2 layer, described warp-knitting polyester composite earthwork cloth adopts and manually makes.
4. according to the wet and soft earth foundation processing method of claim 1, it is characterized in that the bamboo basketry of described step (1) is 1m * 2m, bamboo bar horizontal spacing is 30cm, and longitudinal pitch is 5cm; Described chaste tree basketry is 1.2m * 2.4m, and the transverse and longitudinal spacing is 2cm; Described warp-knitting polyester composite earthwork cloth is bidirectional stretch intensity 〉=40KM/m, elongation rate≤13%, cloth weight 〉=300g, CBR bursting strength 〉=800N; Described two-way polypropylene geo-grid is hot strength 〉=30KN, elongation per unit length≤13%.
5. according to the wet and soft earth foundation processing method of claim 1, it is characterized in that, the mountain skin soil of described step (2), step (3) making be rubble content greater than 70%, maximum particle diameter is no more than 30cm, full section fills.
6. according to the wet and soft earth foundation processing method of claim 1, it is characterized in that described step (4) adopts light-duty road roller to roll, load is 10～12 tons, rolls 6～8 times, does not have obvious wheelmark and gets final product.
7. according to the wet and soft earth foundation processing method of claim 5, it is characterized in that described light-duty road roller is a vibratory roller.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910228042XA CN101713164B (en) | 2009-11-06 | 2009-11-06 | Method for processing udoll foundation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910228042XA CN101713164B (en) | 2009-11-06 | 2009-11-06 | Method for processing udoll foundation |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101713164A true CN101713164A (en) | 2010-05-26 |
| CN101713164B CN101713164B (en) | 2012-08-22 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200910228042XA Expired - Fee Related CN101713164B (en) | 2009-11-06 | 2009-11-06 | Method for processing udoll foundation |
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| Country | Link |
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| CN (1) | CN101713164B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102912784A (en) * | 2012-11-08 | 2013-02-06 | 沈阳建筑大学 | Geotechnical cloth, twig and mountain stone combined treatment soft soil foundation |
| CN112281876A (en) * | 2020-11-18 | 2021-01-29 | 山东科技大学 | Construction method based on interlocking type ecological geogrid |
-
2009
- 2009-11-06 CN CN200910228042XA patent/CN101713164B/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102912784A (en) * | 2012-11-08 | 2013-02-06 | 沈阳建筑大学 | Geotechnical cloth, twig and mountain stone combined treatment soft soil foundation |
| CN112281876A (en) * | 2020-11-18 | 2021-01-29 | 山东科技大学 | Construction method based on interlocking type ecological geogrid |
| CN112281876B (en) * | 2020-11-18 | 2022-02-01 | 山东科技大学 | Construction method based on interlocking type ecological geogrid |
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| Publication number | Publication date |
|---|---|
| CN101713164B (en) | 2012-08-22 |
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Granted publication date: 20120822 Termination date: 20131106 |