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首页> 外文期刊>Australian Geomechanics >EQUILIBRIUM MOISTURE CONTENT OF VOLUNIETRICALLY ACTIVE CLAY EARTHWORKS IN QUEENSLAND
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EQUILIBRIUM MOISTURE CONTENT OF VOLUNIETRICALLY ACTIVE CLAY EARTHWORKS IN QUEENSLAND

机译：昆士兰州主动性黏土土的平衡水分含量

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摘要

The water changes of volumetrically active clays result in movement of the overlying pavements and in a change in the subgrade strength. This adverse effect results in damage to roads and buildings, with over one-third of Queensland covered with such clays. This paper discusses the equilibrium moisture content (EMC) operating range in southeast Queensland, and the philosophy behind the procedures for assessment and design on reactive clay earthworks. Two important considerations for wet environments with highly reactive clays are 1) the EMC is wet of the Optimum Moisture Content (OMC), and 2) the long-term density is below the Maximum Dry Density (MDD). If this placement condition is not targeted, then movements can be expected in the early years. This may result in damage to overlying structures irrespective of the design subgrade strength adopted. Targeting the OMC and MDD in such cases is building in future long term movement. This EMC condition must be considered together with construction issues.
机译：体积活性粘土的水变化导致上覆路面的运动和路基强度的变化。这种不利影响导致对道路和建筑物的破坏，昆士兰的三分之一以上都被此类粘土覆盖。本文讨论了昆士兰州东南部的平衡含水量（EMC）操作范围，以及活性土工评估和设计程序背后的理念。对于具有高反应性粘土的潮湿环境，两个重要的考虑因素是：1）EMC处于最佳水分含量（OMC）的潮湿状态; 2）长期密度低于最大干密度（MDD）。如果此放置条件不是针对性的，则可以预期在早期会有运动。无论采用何种设计路基强度，都可能导致上覆结构的损坏。在这种情况下，以OMC和MDD为目标将成为未来的长期发展方向。必须将此EMC条件与构造问题一起考虑。

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