【摘 要】
：
The impact of fabric anisotropy on the behaviour of soil has been paid great attention; however,the effects of the principal stress direction on the cyclic undrained response of saturated silt are not
【机 构】
：
Institute of Geotechnical Engineering,Nanjing Tech University,Nanjing,China
【出 处】
：
第一届国际海洋工程地质学术研讨会(ISMEG2016)(2016 International Symposium on
论文部分内容阅读
The impact of fabric anisotropy on the behaviour of soil has been paid great attention; however,the effects of the principal stress direction on the cyclic undrained response of saturated silt are not fully understood.An experimental study aimed at providing insights into the effect of principal stress direction on the cyclic behaviour of saturated silt with a relative density of 50%under isotropic consolidation condition is presented.A series of cyclic shear tests were conducted by GDS hollow cylinder torsional apparatus that can apply four dynamic loads,namely inner pressure,outer pressure,axial load and torque.Specimens at identical initial states were subjected to 90° jump rotation of principal stresses from different principal stress direction angle ασ0 at the initial time of cyclic loading with a constant intermediate principal stress coefficient.This investigation was placed on the influence of ασ0 on the pore pressure response,deformation characteristics and cyclic shear strength.The results show that the principal stress direction has a considerable influence on cyclic shear strength of saturated silt.It decreases significantly as the ασ0 increased to approximately 45°,and then increases with the ασ0 increased to 90°.This observation is considered to be directly related to the soil fabric anisotropy.
其他文献
This article investigates the soil creep deformation characteristics by single shear creep laboratory tests about clayey soils in Liu Hua Oil Fields,offshore China.The results of tests report the cree
The loss of structure of natural marine clay under the cyclic loading can lead to a significant change of mechanical properties,therefore,soil structure is a key factor needed to be considered in the
Gas content has a significant influence on acoustic responses of marine gas charged sediments.Using the Global Digital System(GDS)with bender-extender element system(BES)and precision measurement syst
As well known,the development of real-time monitoring system and stability analysis theory for geotechnical structures have undergone a relatively long period.Up to now,a big variety of innovative sen
Recent years,in order to protect the safety of maritime trade channel,China has carried out a large number of reclamation island projects in South China Sea.So calcareous sand,as the main raw material
Using the newly developed rotating flume experiment apparatus,the friction slope and flowing rate of the debris flow was measured to evaluate the effect of flow rate on the friction slope.Subsequently
Seafloor sliding is one of the geohazards to offshore infrastructures.The instability of the seafloor in shallow waters may be induced by waves.To analyze the seafloor stability under waves,the elasti
A modified elasto-plastic constitutive model with rotation hardening which could systematically describe the monotonic and cyclic mechanical behaviors of typical marine soils combining the subloading,
The collapsibility of saline soil subgrade has great influence on the settlement control of high speed railway.This paper combined with collapsibility disease appeared in second double line of Lanzhou
Quantification of the risk posed by submarine landslides is an essential part of the design process for offshore oil and gas developments and also for prediction and mitigation of potentially devastat