Tong-san Freeway(Zhuhai) Disposal Of Soft Soils Subgrade And Optimization Design

In recent years the superhighway construction got the quick development, being open to traffic the mileage to increase consumedly, the superhighway has already become one of the important markings of the modern transportation.Compared with the general highway, the superhighway faces to the route, roadbed, road of have higher request, so usually need to cross the bad foundation district, particularly the soft soil road segment, the soft soil has the high compressibility and contains the amount of water high, the big crevice compare, small permeate, the stability of water is bad, the anti- shears the strength low etc. characteristics.The soft soil of the our country[1] mainly distributes to follow sea and each big rivers at the southeast estuarine go into the region in the sea delta flood plain, such as Tianjin Tanggu, Lianyun harbor, Shanghai, Ningbo, Wenzhou, Fuzhou, Zhuhai, Shenzhen etc..Pearl Rever Delta big and parts of foundations of region for alongside the sea the soft soil that sink to accumulate with river mutually, the province of Guangdong has already set up and just a few data enunciations of superhighway that set up, the longer soft soil road segment, since not easy processing, build the price to also correspond the increment.Such as have already set up of in the superhighway, the length is the wide superhighway of Guangfo of the 15.7 kms, the soft soil foundation road segment long 4.43 kms, have 29.4% of the total mileage of whole line;The wide deep superhighway is whole long 122 kms, the soft soil foundation road segment long 34 kms, have 28% of the total mileage of whole line, the Fokai superhighway long 80 kms, among them the soft soil foundation road segment long 12.98 kms, about have whole line 16.3%.It is thus clear that at Pearl Rever Delta soft soil foundation in region[2] is very high in the comparison in the superhighway, the choice reasonable soft foundation processing method[3] will expect the investment, work project, in the late to protect to manage etc. to rise to the front of the engineering decisive function.Adopt the heap to carry to prepare the method for press to carry on the processing to the soft soil roadbed generally currently, but constuct along with the our country superhighway of fly to develop soon, the request of the work period and the processing result is also more and more high.The heap of the normal...