摘要
浙江台州高速公路呈南北向穿越浙江东部沿海平原。路基一带软土极为发育,约占路段长度的65.7%,软土层总厚度一般可达20～37m,岩性以海积、湖积的淤泥及淤泥质粘土为主。软土的物理力学性质极差,孔隙比多在1.5以上,内聚力多小于10kPa,压缩系数(a1-2)最高可达2.83Mpa-1,一般都在1.3MPa-1以上,渗透系数一般为4.63×10-8～1.5×10-7cm/s,固结系数为1.85×10-4～4.94×10-3cm2/s。因此,软土多处造成路基大幅度沉降、开裂和滑移,给公路施工和运营带来了许多困难。
Taizhou superhighway passes through the coastal plain in eastern part of Zhejiang Province. Soft ground, widespread distributed there, occupies 65.7% of the route with the thickness about 20~37m. The soft ground is mainly marine or lacustrine silt and silty clay with poor physical- mechanical property. Its porosity ratio is over 1.5, cohesive force is less than 10 kPa, compressibility factor (a1- 2) over 1.3 MPa~- 1 with the maximum to 2.83 MPa~- 1, coefficient of permeability about 4.63×10~-8~1.5×10~-7cm/s, coefficient of consolidation about 1.85×10~-4~4.94×10~-3cm^2/s. Consequently, large extent subsidence, crack and slip take place along the soft ground foundation, which bring about a lot of difficulties for construction and working of the superhighway.
出处
《中国岩溶》
CAS
CSCD
2003年第3期225-229,共5页
Carsologica Sinica
关键词
高速公路
软土地基
工程地质特征
浙江台州
Superhighway
Soft ground foundation
Engineering geological property of soft ground
Taizhou, Zhejiang
