On the Mechanical Behaviour of the Gibraltar Strait Breccias

机译：关于直布罗陀海峡角砾岩的力学行为

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The tunnel planned for the Gibraltar Strait fixed link will cross-among other formations-two paleo-channels filled with breccias.The breccias exhibit poor mechanical properties in the range between stiff clays and weak rocks.The overburden and high pore pressures in-situ may lead,in combination with the low strength of the breccias,to heavy squeezing during construction of the tunnel.The mechanical properties of the breccias were studied using special triaxial tests.The testing technique is very demanding due to the need for pore water control in combination with high applied loads.Neither standard rock nor soil mechanics testing equipment is adequate for this purpose.In addition,the low hydraulic conductivity of the breccias demands extremely low loading rates,which leads to very long test durations.The paper presents and comments on the test results on the strength,volumetric behaviour,consolidation state and hydraulic conductivity of the breccias.

机译：计划用于直布罗陀海峡固定连接的隧道将穿越其他地层-充满角砾岩的两个古河道-角砾岩在硬质粘土和弱岩石之间的范围内表现出较差的力学性能。铅，再加上角砾岩的强度低，导致隧道施工时严重挤挤。采用特殊的三轴试验研究了角砾岩的力学性能。由于结合了孔隙水控制，测试技术要求很高。在较高的施加载荷下，标准的岩石和土壤力学测试设备都无法满足此目的。此外，角砾岩的低水力传导率要求极低的载荷率，从而导致非常长的测试时间。关于角砾岩的强度，体积行为，固结状态和水力传导率的测试结果。

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《Constitutive modeling of geomaterials : advances and new applications》|2012年|409-416|共8页
会议地点 Beijing(CN)
作者
Weixin Dong; E.Pimentel; G.Anagnostou;
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作者单位

Department of Civil,Environmental and Geomatic Engineering ETH Zurich Wolfgang-Pauli-Strasse 15,8093 Zurich,Switzerland;

Department of Civil,Environmental and Geomatic Engineering ETH Zurich Wolfgang-Pauli-Strasse 15,8093 Zurich,Switzerland;

Department of Civil,Environmental and Geomatic Engineering ETH Zurich Wolfgang-Pauli-Strasse 15,8093 Zurich,Switzerland;

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中图分类土力学、地基基础工程;
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On the Mechanical Behaviour of the Gibraltar Strait Breccias

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