CN102912702A - Soft soil subgrade treatment method adopting spodosol and hill-skill soil - Google Patents
Soft soil subgrade treatment method adopting spodosol and hill-skill soil Download PDFInfo
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- CN102912702A CN102912702A CN2012104433900A CN201210443390A CN102912702A CN 102912702 A CN102912702 A CN 102912702A CN 2012104433900 A CN2012104433900 A CN 2012104433900A CN 201210443390 A CN201210443390 A CN 201210443390A CN 102912702 A CN102912702 A CN 102912702A
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Abstract
The invention provides a soft soil subgrade treatment method adopting spodosol and hill-skill soil, which is an affordable subgrade construction technique realizing local material utilization, convenience for construction and firm subgrade. The technical scheme is as follows: a, a trough is cut in the soft soil subgrade, firstly, down-digging in full width from the in-situ plane is performed, the elevation of the original ground and the elevation of the grooved ground are detected at any time to guarantee the filling thickness, and secondly, the width of the trough bottom is measured to meet the requirement for the filling width of the subgrade, gradient of the excavated side slope is taken into consideration in road trough excavation, and soil is placed with a distance of 2-3 m reserved to the edge of the road trough; b, a shortcut is constructed at the trough bottom through hill-skill soil, then part of soil left after trough cutting is mixed with lime in the road trough, the mixture is shaped, compacted and cured to form a first layer gravel limestone soil structure; and c, after the curing of the first layer gravel limestone soil structure is performed, a second layer gravel limestone soil structure is constructed, soil, lime and hill-skill soil with calculated quantity are uniformly mixed and spread as per a certain width and thickness, and then shaping, compacting and curing are performed again. The method is applied to soft soil and salinized soil subgrade strengthening, and meets the requirement for one-step construction of road subgrades in cities.
Description
Technical field
The present invention relates to the road construction technical field, specifically a kind of dirt adds mountain skin stone and processes soft soil roadbed method, is applicable to build at very weak ground the situation of road foundation.
Background technology
Because coastal industrial base geological condition is complicated, coastal industrial base, Yingkou road belongs to urban road, and the pavement design absolute altitude is restricted, and groundwater table is high again, does not reach the roadbed minimum height of fill of regulation and stipulation, and roadbed was in wet condition throughout the year.Adopt conventional Soft Soil Subgrade Treatment Method both to need to waste a large amount of materials and fund, can not fundamentally solve the subgrade stability problem again, and need the long duration (having 18 months sedimentation period just can carry out pavement construction such as the roadbed General Requirements).Seek a kind of be economic and practically can gather materials on the spot again, convenient construction, and the effective ways of soft soil roadbed processing can be proposed within a short period of time, be the very urgent task of pendulum in face of coastal industrial base builder.
Summary of the invention
The purpose of this invention is to provide a kind of proposition dirt and add mountain skin stone and process soft soil roadbed method, be particularly useful for building at very weak ground the situation of road foundation.Its advantage is to beat sidewalk with mountain skin stone construction machinery and road materials are transported in the groove of the road of weakness; Part mountain skin stone enters in the bottom land foundation soil, has improved bearing capacity of foundation soil.Dirt adds mountain skin stone and processes soft soil roadbed technology, it is characterized in that: a, soft soil roadbed fluting, and at first full width is down dug from former ground line, detects at any time the absolute altitude behind original ground absolute altitude and the fluting, to guarantee filling-up thickness; Measuring flume bottom width degree, to satisfy the roadbed filling width, groove excavation in road will be considered the gradient of excavation slope, placing soil will be apart from road trough rim 2 ~ 3m; B, beat sidewalk with mountain skin stone first at bottom land, then in the groove of road with the remaining part soil of fluting and lime mixes and stirs, integer, roll, health, form the grey soil structure of first floor gravel work stone; C, after the health of first floor gravel work stone ash soil structure is finished, carry out second layer gravel work stone dirt structure construction: will calculate good soil amount, amount of lime, mountain skin stone amount mix and evenly shakeout by one fixed width, thickness afterwards; Again carry out shaping, roll, health.
This achievement can be applied to build advanced road and ordinary road, is particularly useful for the needs that urban roadbed once builds up.It can make the compaction quality of Chinese Udoll roadbed and intensity reach advanced world standards, its structure such as Fig. 1.
The beneficial effect of type of the present invention is: application of the present invention makes Udoll roadbed intensity after calcium lime powder is processed improve 2 ~ 6 times, and plastic strain reduces 60 ~ 90%.The intensity of Stabilized Soil own improves 5 ~ 12 times, and frost resistance improves, and the rear density of enduring cold is unchanged, and the frost heave coefficient reduces 50 ~ 70%; Use to give birth to the soft soil roadbed technology building of stone flour consistent wet road surface, but the lime in its road structure, flyash, gravel base thickness attenuate 1/3 ~ 1/2; Rendzinas is mixed mountain skin stone structure, adds mountain skin stone saving construction cost 35 Yuan/㎡ with powder spray piling; Coastal industrial base is built up 1,500,000 square metres of rendzinases and is mixed mountain skin stone road structure in Yingkou, than adopting powder spray piling to save 5,250 ten thousand yuan, than adopting packing sedimentation by throwing stones to save 2505 ~ 6,180 ten thousand yuan.If 4,000,000 square metres in engineering road all adopts this structure, will economize on the use of funds about 1.2 hundred million.If 1,200 ten thousand square metres in the total planning area road all adopts this structure, will economize on the use of funds about 3.6 hundred million.
This processing scheme is by detection, and nearly 2 years observation, proves that construction quality is better than other conventional treatment method, and the construction period is reasonable, has saved the soft soil roadbed processing time, has accelerated construction speed, shortened the construction period,, regional economic development also there is facilitation.
Description of drawings
Fig. 1 is road structure layer schematic diagram of the present invention;
Among the figure: dirt is mixed mountain skin cubic meter of stone case (gravel work stone dirt scheme): through recommending the road groove depth 90cm of excavation below the roadbed design absolute altitude after the test, adopt dirt to mix mountain skin stone and fill, the mass ratio that dirt is mixed the mountain skin is lime: soil: mountain skin stone=10:30-40:50-60.Mixture proportions recommended is lime: soil: mountain skin stone=10:30:60 or=10:40:50.
The specific embodiment
The present invention recommends road-mix construction, and the Specific construction process is as follows:
1. roadbed is slotted
At first down dig to design elevation from former ground line.Road groove excavation will be considered the gradient of excavation slope, and placing soil will be apart from road trough rim 2 ~ 3m.
2. first floor gravel work stone dirt
Beat sidewalk with mountain skin stone first at bottom land, then in the groove of road the remaining part soil of fluting, play mountain skin stone and lime that sidewalk does not enter bottom land, the three mixes and stirs, integer, roll, health, form the grey soil structure of first floor gravel work stone;
After the health of first floor gravel work stone dirt is finished, carry out second layer construction.Good soil amount, amount of lime, mountain skin stone amount mix are evenly rear to be shakeout by one fixed width, thickness with calculating; Again carry out shaping, roll, health.
Claims (2)
1. dirt adds mountain skin stone and processes soft soil roadbed method, it is characterized in that: a, soft soil roadbed fluting, and at first full width is down dug from former ground line, detects at any time the absolute altitude behind original ground absolute altitude and the fluting, to guarantee filling-up thickness; Measuring flume bottom width degree, to satisfy the roadbed filling width, groove excavation in road will be considered the gradient of excavation slope, placing soil will be apart from road trough rim 2 ~ 3m; B, beat sidewalk with mountain skin stone first at bottom land, then in the groove of road with the remaining part soil of fluting and lime mixes and stirs, integer, roll, health, form the grey soil structure of first floor gravel work stone; C, after the health of first floor gravel work stone ash soil structure is finished, carry out second layer gravel work stone dirt structure construction: will calculate good soil amount, amount of lime, mountain skin stone amount mix and evenly shakeout by one fixed width, thickness afterwards; Again carry out shaping, roll, health.
2. dirt according to claim 1 adds mountain skin stone and processes soft soil roadbed method, it is characterized in that: behind the soft soil roadbed fluting, beat sidewalk with mountain skin stone first, and then forming gravel work stone ash soil structure with the mountain skin stone of beating sidewalk and rendzinas mix, the mass ratio that dirt is mixed the mountain skin is lime: soil: mountain skin stone=10:30 ~ 40:50 ~ 60.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012104433900A CN102912702A (en) | 2012-11-08 | 2012-11-08 | Soft soil subgrade treatment method adopting spodosol and hill-skill soil |
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| CN2012104433900A CN102912702A (en) | 2012-11-08 | 2012-11-08 | Soft soil subgrade treatment method adopting spodosol and hill-skill soil |
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| CN102912702A true CN102912702A (en) | 2013-02-06 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104532712A (en) * | 2014-12-25 | 2015-04-22 | 中交第二公路勘察设计研究院有限公司 | Design method and structure for preventing settlement-deformation damage of soft-rock subgrade of road |
| 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 |
| CN105714634A (en) * | 2016-01-23 | 2016-06-29 | 中交三公局第一工程有限公司 | Construction method of soil-rock geological roadbed |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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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2012
- 2012-11-08 CN CN2012104433900A patent/CN102912702A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 (4)
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| 张文全: ""东营市某路段软土路基施工分析"", 《黑龙江交通科技》, no. 6, 30 June 2010 (2010-06-30) * |
| 张海英: ""基于营口沿海产业基地的软土路基处理研究"", 《中国优秀硕士学位论文全文数据库》, 31 December 2011 (2011-12-31) * |
| 王建勇: ""灰土拌山皮石结构在营口软土地基处理中的应用研究"", 《辽宁省交通高等专科学校学报》, vol. 10, no. 2, 30 April 2008 (2008-04-30) * |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104532712A (en) * | 2014-12-25 | 2015-04-22 | 中交第二公路勘察设计研究院有限公司 | Design method and structure for preventing settlement-deformation damage of soft-rock subgrade of road |
| 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 |
| CN105714634A (en) * | 2016-01-23 | 2016-06-29 | 中交三公局第一工程有限公司 | Construction method of soil-rock geological roadbed |
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Application publication date: 20130206 |