CN102493305A - Subgrade treatment structure of soft soil areas and construction technology thereof - Google Patents
Subgrade treatment structure of soft soil areas and construction technology thereof Download PDFInfo
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- CN102493305A CN102493305A CN2011103865936A CN201110386593A CN102493305A CN 102493305 A CN102493305 A CN 102493305A CN 2011103865936 A CN2011103865936 A CN 2011103865936A CN 201110386593 A CN201110386593 A CN 201110386593A CN 102493305 A CN102493305 A CN 102493305A
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Abstract
The invention discloses a subgrade treatment structure of soft soil areas, which is arranged on the soil matrix, wherein a hill-skin oil bearing layer, a limestone soil adjustment layer and a pavement structure layer are sequentially arranged from bottom to up and have the height of 60cm to 80cm; and the limestone mixing amount of the limestone soil adjustment layer is 8% to 10%. The subgrade treatment structure also comprises at least one seeping tank which is also used as a wall chase. The invention further discloses a construction technology of the subgrade treatment structure. Because the limestone mixing amount of the limestone soil is increased, the strength of the limestone soil adjustment layer is increased, a break stone water-resistant layer is dispensed, the designed elevation of a road is reduced, accordingly, under the premise of ensuring the strength and stability of a subgrade, the engineering earth volume is reduced, and the construction investment is reduced. The limestone mixing amount of the limestone soil is appropriately improved, the whole strength of the pavement is also benefited, meanwhile, the stability of the subgrade under the groundwater level freeze-thaw cycle condition is also improved, and the whole stability of the pavement is improved.
Description
Technical field
The present invention relates to road technology field, relate in particular to a kind of roadbed Processing Structure of soft clay area.The invention still further relates to the construction technology of this roadbed Processing Structure.
Background technology
Be illustrated in figure 1 as the cross-sectional configuration sketch map of the roadbed Processing Structure of common a kind of soft clay area; 60 centimetres to 80 centimetres mountain skin soil supporting layer 1 at first is set on soil matrix; Upwards build 40 centimetres rubble water barrier 2 then; Make groundwater table B be positioned at rubble water barrier 2, to prevent the erosion of underground water to roadbed.On rubble water barrier 2, fill the rendzinas adjustment layer 3 of mixing ash amount 6% again, build road structure 4 at last, make road structure 4 reach design elevation A (with reference to A place among the figure 1).
But coastal and some are along the lake, along the river the area, groundwater table is than higher.When constructing road, for guaranteeing that roadbed keeps long-term stability under the higher phreatic effect of water level, also to satisfy design elevation A simultaneously, just need do a large amount of earth volumes and come bed hedgehopping in the job site of hypsography low-lying, so just increased the investment of engineering.
If reduce the design elevation of road, construction investment is practiced thrift in the approximately quite backfill earthwork of thickness like this.But the rubble water barrier 2 that under the situation of the design elevation after the reduction, is provided with 40 centimetres again prevents the erosion of underground water to roadbed, just can not satisfy the minimum thickness requirement of rendzinas adjustment layer 3.
Therefore, those skilled in the art is devoted to develop a kind of roadbed Processing Structure that satisfies the good soft clay area of resistance to overturning under low design elevation, the phreatic high condition simultaneously, and the construction technology of this ground Processing Structure.
Summary of the invention
Because the above-mentioned defective of prior art, technical problem to be solved by this invention provides the roadbed Processing Structure of the good soft clay area of resistance to overturning under a kind of low design elevation, the phreatic high condition.
For realizing above-mentioned purpose, the invention provides a kind of roadbed Processing Structure of soft clay area, be arranged on the soil matrix, set gradually 60 centimetres to 80 centimetres mountain skin soil supporting layer, rendzinas adjustment layer and road surface structare layer from bottom to top; It is 8% to 10% that said rendzinas is adjusted the grey amount of mixing of layer.
Preferably, said roadbed Processing Structure also comprises at least one infiltration groove.
Preferably, the double chase of doing of said infiltration groove.
Preferably, groundwater table is positioned at said rendzinas adjustment layer.
Preferably, the discrepancy in elevation of design elevation and said groundwater table is less than 1.1 meters.
Another object of the present invention is to provide a kind of roadbed Processing Structure construction technology, may further comprise the steps with good construction environment:
Further, after the step 4, drain said infiltration groove, and in said infiltration groove pipeline installation.
Further, step 2 also comprises and utilizes said infiltration groove that groundwater table is reduced under the said mountain skin soil supporting layer.
Further, said rendzinas adjustment layer to mix the ash amount be 8% to 10%.
Further, the discrepancy in elevation of design elevation and said groundwater table is less than 1.1 meters.
The invention has the beneficial effects as follows:
Rendzinas (claiming that also lime improves soil) is a kind of roadbed filling commonly used, in highway construction in the past, is used widely.But prior art still can not accomplish to confirm concrete lime incorporation to different soil property, different execution conditions such as water content to the just in addition wide in range restriction on the basis that laboratory simulation is calculated of the dust burdening of rendzinas.
The roadbed Processing Structure of soft clay area of the present invention; Improve the ash amount of mixing of rendzinas, strengthened the intensity of rendzinas adjustment layer, save the rubble water barrier; Reduced the design elevation of road; Thereby under the prerequisite of intensity that guarantees roadbed and stability, reduced the earth volume of engineering, reduced construction investment.The ash amount of mixing of the rendzinas that suitably improves; Also help the bulk strength on road surface; Improved simultaneously the stability of roadbed under groundwater table freeze thawing cycling condition again; Therefore improved the resistance to overturning on road surface, the roadbed Processing Structure of soft clay area of the present invention has satisfied simultaneously under low design elevation, the phreatic high condition and has had good whole stability.
The roadbed Processing Structure construction technology of soft clay area of the present invention; Offered the double infiltration groove of doing chase; In work progress, reduced the groundwater table absolute altitude in the red line scope effectively by the infiltration groove, for the roadbed filling construction provides good construction environment.Thereafter, the groove that should seep water again in conjunction with follow-up various pipeline constructions, has further been practiced thrift the construction working amount of engineering as chase, has shortened the duration, has reduced investment.
Below will combine accompanying drawing that the technique effect of design of the present invention, concrete structure and generation is described further, to understand the object of the invention, characteristic and effect fully.
Description of drawings
Fig. 1 is the structural representation of existing roadbed Processing Structure.
Fig. 2 is the structural representation of roadbed Processing Structure one specific embodiment of the present invention.
Fig. 3 is the construction sketch map of roadbed Processing Structure of the present invention under existing construction technology condition.
Fig. 4 is the construction sketch map of roadbed Processing Structure of the present invention under construction technology of the present invention.
The specific embodiment
As shown in Figure 2, roadbed Processing Structure one specific embodiment of soft clay area of the present invention is arranged on the soil matrix, sets gradually 60 centimetres to 80 centimetres mountain skin soil supporting layer 1, rendzinas adjustment layer 3 and road surface structare layer 4 from bottom to top.Wherein, rendzinas adjustment layer 3 to mix the ash amount be 8% to 10%.
In the present embodiment; The design elevation A of roadbed Processing Structure is 3 meters, and (in other embodiments, according to the actual conditions of construction environment, design elevation A can adjust; Maybe for 2.6 meters, 2.8 meters, 3.0 meters, 3.2 meters, 3.4 meters or the like various maybe), groundwater table B is positioned at rendzinas adjustment layer 3.
Referring to shown in Figure 4, this roadbed Processing Structure also comprises the infiltration groove 51 that is positioned at soil matrix 5 both sides in practical implementation.In follow-up construction, the also double chase of doing of infiltration groove 51 wherein can be provided with pipeline 6.
The roadbed Processing Structure of soft clay area of the present invention, to execution conditions such as special soil property, water content, mixing the raising of ash amount and confirming as 8% to 10% rendzinas; Strengthened the intensity of rendzinas adjustment layer; Save rubble water barrier of the prior art, reduced the design elevation of road, thereby under the prerequisite of intensity that guarantees roadbed and stability; Reduce the earth volume of engineering, reduced construction investment.The ash of mixing of the rendzinas that suitably improves is measured, and also helps the bulk strength on road surface, has improved the stability of roadbed under groundwater table freeze thawing cycling condition again simultaneously, has improved the resistance to overturning on road surface.
As shown in Figure 3; Adopt existing construction technology, when the construction operation of roadbed Processing Structure of the present invention, groundwater table B is arranged in rendzinas adjustment layer 3; Thereby cause rendzinas to adjust layer 3 construction operation in groundwater environment; Construction environment is not good, the insufficient strength of construction back rendzinas adjustment layer 3, and structural stability is not good.
As shown in Figure 4, adopt roadbed Processing Structure construction technology of the present invention, may further comprise the steps:
Thereafter, even groundwater table B gos up to rendzinas adjustment layer 3 again, the structural strength of rendzinas adjustment layer 3 also can obtain basic assurance, satisfies technological requirement.
The present invention adopts above-mentioned construction technology, under the prerequisite of intensity that guarantees roadbed and stability, can the design elevation A of roadbed Processing Structure be reduced significantly, has reduced the earth volume of engineering, has reduced construction investment.
Owing to adopted road structure of the present invention; Can the discrepancy in elevation of design elevation and groundwater table be controlled at less than in 1.1 meters the scope; Satisfied the construction environment requirement of low design elevation, phreatic high simultaneously; And under this construction environment, obtained to have the road structure of good whole stability.
The roadbed Processing Structure construction technology of soft clay area of the present invention; Offered the double infiltration groove of doing chase; In work progress, reduced the groundwater table absolute altitude in the red line scope effectively by the infiltration groove, for the roadbed filling construction provides good construction environment.Thereafter, the groove that should seep water again in conjunction with follow-up various pipeline constructions, has further been practiced thrift the construction working amount of engineering as chase, has shortened the duration, has reduced investment.
More than describe preferred embodiment of the present invention in detail.Should be appreciated that those of ordinary skill in the art need not creative work and just can design according to the present invention make many modifications and variation.Therefore, all technician in the art all should be in the determined protection domain by claims under this invention's idea on the basis of existing technology through the available technical scheme of logical analysis, reasoning, or a limited experiment.
Claims (10)
1. the roadbed Processing Structure of a soft clay area is arranged on the soil matrix, sets gradually 60 centimetres to 80 centimetres mountain skin soil supporting layer, rendzinas adjustment layer and road surface structare layer from bottom to top; It is characterized in that: it is 8% to 10% that said rendzinas is adjusted the grey amount of mixing of layer.
2. roadbed Processing Structure as claimed in claim 1 is characterized in that: said roadbed Processing Structure also comprises at least one infiltration groove.
3. roadbed Processing Structure as claimed in claim 2 is characterized in that: the double chase of doing of said infiltration groove.
4. like the arbitrary described roadbed Processing Structure of claim 1 to 3, it is characterized in that: groundwater table is positioned at said rendzinas adjustment layer.
5. like the arbitrary described roadbed Processing Structure of claim 1 to 3, it is characterized in that: the discrepancy in elevation of design elevation and groundwater table is less than 1.1 meters.
6. the construction technology of the roadbed Processing Structure of the described soft clay area of above-mentioned arbitrary claim may further comprise the steps:
Step 1 at least one side of soil matrix, is excavated the double infiltration groove of doing chase;
Step 2 on said soil matrix, is provided with 60 centimetres to 80 centimetres mountain skin soil supporting layer;
Step 3 is provided with rendzinas adjustment layer on said mountain skin soil supporting layer;
Step 4 is provided with road surface structare layer on said rendzinas adjustment layer.
7. construction technology as claimed in claim 6 wherein, after the step 4, drains said infiltration groove, and in said infiltration groove pipeline installation.
8. construction technology as claimed in claim 6, wherein, step 2 also comprises utilizes said infiltration groove that groundwater table is reduced under the skin soil supporting layer of said mountain.
9. construction technology as claimed in claim 6, wherein, it is 8% to 10% that said rendzinas is adjusted the grey amount of mixing of layer.
10. like the arbitrary described construction technology of claim 6 to 9, wherein, the discrepancy in elevation of design elevation and said groundwater table is less than 1.1 meters.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2011103865936A CN102493305A (en) | 2011-11-29 | 2011-11-29 | Subgrade treatment structure of soft soil areas and construction technology thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2011103865936A CN102493305A (en) | 2011-11-29 | 2011-11-29 | Subgrade treatment structure of soft soil areas and construction technology thereof |
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| CN102493305A true CN102493305A (en) | 2012-06-13 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104762859A (en) * | 2015-03-17 | 2015-07-08 | 江苏花王园艺股份有限公司 | Method for treating soft soil roadbed by hillside stones |
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| EP0355014A1 (en) * | 1988-08-19 | 1990-02-21 | Bau-Ag Strabag | Consolidation of earth's surface |
| CN101343852A (en) * | 2008-08-19 | 2009-01-14 | 中交第二公路勘察设计研究院有限公司 | Method for filling highroad roadbed by waste steel slags |
| CN202369883U (en) * | 2011-11-29 | 2012-08-08 | 上海市城市建设设计研究总院 | Road base treatment structure for soft soil region |
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2011
- 2011-11-29 CN CN2011103865936A patent/CN102493305A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0355014A1 (en) * | 1988-08-19 | 1990-02-21 | Bau-Ag Strabag | Consolidation of earth's surface |
| CN101343852A (en) * | 2008-08-19 | 2009-01-14 | 中交第二公路勘察设计研究院有限公司 | Method for filling highroad roadbed by waste steel slags |
| CN202369883U (en) * | 2011-11-29 | 2012-08-08 | 上海市城市建设设计研究总院 | Road base treatment structure for soft soil region |
Non-Patent Citations (5)
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| 叶继杰等: "软土土质中管道沟槽开挖施工技术", 《山西建筑》 * |
| 姜晨光等: "石灰改良软土路基力学性能的研究", 《2011中国功能材料科技与产业高层论坛论文集（第三卷）》 * |
| 尚奇: "沿海地区软土路基处理方案研究", 《北方交通》 * |
| 戢英: "公路路基软土处理的施工", 《黑龙江科技信息》 * |
| 李英琦: "软土地区排水管道铺设工程技术研究", 《城市道桥与防洪》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104762859A (en) * | 2015-03-17 | 2015-07-08 | 江苏花王园艺股份有限公司 | Method for treating soft soil roadbed by hillside stones |
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Application publication date: 20120613 |