能源地下连续墙的热力学行为模型试验研究

Physical Modeling Research on Thermo-Mechanical Behavior of Energy Diaphragm Wall

鉴于目前国内外针对能源地下连续墙的热力学行为的研究较少,开展了能源地下连续墙的室内模型试验研究。为了研究不同换热工况以及约束条件对墙体以及墙土接触面热力学行为的影响,设计了三组对照试验。通过对试验过程中读取的温度、应力、应变数据进行分析,探索了地下连续墙在换热过程中的温度场、墙体内的垂向应变以及接触面法向应力的变化规律。对比研究了不同工况下墙内轴向应变以及墙土接触面法向应力数据的差异性,揭示了温升变化和约束变化对这些参数的影响机制以及重要程度。

Nowadays,the researches on the thermo-mechanical behavior of energy diaphragm wall lacks in contrast to its increasing significance in energy geostructures worldwide.To study the thermo-mechanical behavior of wall and wall-soil interface under different heating and constraining conditions,three contrast tests were conducted in a self-made laboratory model chamber.By analysing the data obtained,this paper presented the change laws of fields regarding heat,vertical strain in wall,and normal stress on the interface during process.Furthermore,the variations of these parameters revealed the mechanism,in which temperature changes and constrain changes would influence the thermo-mechanical behavior of energy diaphragm wall.