Soft Soil Property And Handling Technology In Naqu Area Of Sitsang

With the completion and operation of the Qinghai-Tibet railway, economic of Sitsang .especially Naqu area will rapidly advance. As infrastructure of economic advance, road construction of Naqu area will quickly develop, too. Because there are lots of soft soil , such as mud,bog soil and so on in Naqu area of Sitsang, which takes on many features such as hige compressibility, big settling volume,bad drainage consolidation stability and so on,it take much trouble to existing and newbuilding road construction in Naqu area of Sitsang. Whereas technical force is very weakness in scientific experiment and research, prospective design, construction, conservation and maintenance, this thesis analytically study soft soil engineering property and handling technology by wildly referring to cure on soft soil, especial referring to geologic examination information of Naqu area, which is published by the first design institute of railway department.This thesis study several aspects following:1.Put forward formation cause of soft soil in Naqu area and infection of environmental factor;2. comparing with soft soil of somewhere else, probe into its frost thawing property, swellabitity, rheological property, thixotropy;3. Expatiating mechanism of action of existing handling technology and environmental factors of chosen handling technology;4. Put forward several methods such as change and stuff bed course, gravel pile to handle soft soil foundation in Naqu area;5. By analyzing mechanism of subgrade consolidation with gravel pile of qinshen passenger special line and prefabrication drains in soft soin in Yuhui , applying them to soft soil handling in Naqu area is effective.