首页>
外文会议>International pipeline conference
>SOME OBSERVATIONS ON SOIL-PIPE INTERFACE SHEAR STRENGTH IN DIRECT SHEAR UNDER LOW EFFECTIVE NORMAL STRESSES AND LARGE DISPLACEMENTS
【24h】
SOME OBSERVATIONS ON SOIL-PIPE INTERFACE SHEAR STRENGTH IN DIRECT SHEAR UNDER LOW EFFECTIVE NORMAL STRESSES AND LARGE DISPLACEMENTS
Experimental work is undertaken at the University of British Columbia (UBC) to study the soil-pipe interface shear strength at levels of shear displacements and effective normal stresses typically encountered in offshore soil-pipe interaction problems. A macro-scale interface direct shear apparatus having a test specimen footprint of 1.72 m x 7.75 m was designed and built for this purpose. The apparatus is capable of testing various soil-pipe interfaces under effective normal stresses in the range of 3 kPa to 6 kPa. A maximum shear displacement of 1.2 m is achievable at rates ranging from 0.1 μm/s to 1 mm/s. Sensors mounted at the interface enable the accurate determination of the effective normal stress at the interface when fully saturated fine-grained soils are tested. This paper presents some observations arising from a series of interface direct shear tests involving fine-grained soils of different plasticity against bare and epoxy coated steel surfaces.
展开▼
机译:不列颠哥伦比亚大学(UBC)进行了实验工作,以研究在剪切位移水平和近海土壤管相互作用问题中通常遇到的有效法向应力水平下的土壤管界面剪切强度。为此目的,设计并制造了具有1.72 m x 7.75 m的试样足迹的大型界面直接剪切设备。该设备能够在3kPa至6kPa的有效法向应力下测试各种土壤管界面。在0.1μm/ s到1 mm / s的速率下,可以实现1.2 m的最大剪切位移。当测试完全饱和的细粒土壤时,安装在界面上的传感器可以准确确定界面上的有效法向应力。本文提出了一些观察结果,这些观察结果是通过一系列界面直接剪切试验得出的,这些试验涉及在裸露的表面和环氧涂层的钢表面上具有不同可塑性的细粒土壤。
展开▼