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The structure of a subgrade should be designed on the basis of its utilizing demands, natural conditions and construction conditions locally. Before the design, information should be gathered in terms of local geology, water, terrain, weather and so on, in particular, attention should be paid on the impacts of local terrain and geology. Designer should adopt proper cross section and gradient of side slope for the subgrade, as well as take disease control and prevention measures.

Under the impact of external load, large subsidence will happen on soft soil subgrade and last for a long time. When a superhighway is built on soft soil subgrade, potential subsidence after construction will make large damage on traffic transportation, so appropriate measures should be taken to consolidate the soft soil subgrade. There are many ways to consolidate it but with both merits and limitations. Thus, how to choose proper ways to deal with it is directly associated with quality, progress and investment of the construction.

The structural design of the roadbed should be designed according to the use of requirement and the local natural conditions,as well as combine the construction condition. Before design, Fully data such as geology along the line, hydrology, terrain, meteorology and so on should be collected . Pay special attention to the influence of the topographical and geological conditions, and have the choice of appropriate form of embankment sections,grade of side slope and disease measures of prevention and control .
Soft soil subgrade has the character of big subsidence and long time of continuity under the influence of the outer load. To build the high grade highway in the soft soil foundation , the potential settlement after the construction of transportation will cause a great harm. therefore, Effective and reasonable reinforcement measures should be taken on the weak foundationspin. Soft soil foundation dealed with many ways has its advantages and disadvantages and limitations, how to select the way of the reasonable foundation treatment is directly related to project quality, progress of the project and project investment.
本人翻译 可供参考

The structure design of roadbed should use request and local natural condition according to it, and combine a construction condition to carry on a design.Before designing in response to the full collections follow datas, such as line geology, hydrology, geography and weather...etc..To specially notice geography and geology conditional influence choose the measure harming appropriate roadbed cross section form, the side ascent slope and prevention and cure disease.
The soft soil roadbed carries a function in the outside lotus under, it sinks to decline greatly, and keeps on time long.Build grade highway in Gao on the soft land radicle, the latent construction will bring very great harm to transportation after sinking to decline, therefore the weak foundation should adopt reasonable to effectively reinforce to handle Cuo Xuan.The way of soft land radicle processing includes a lot, each treatment with merit and shortcoming and limits sex, how chooses reasonable foundation directly relates to engineering quality, work project and engineering investment.

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