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针对水工砼工程实际中常常遇到张开型裂缝或缝内含有与砼和岩石不同导热介 质的材料，引入等效热导率，以确定热断裂解，即求解含缝体的温度场、应力场或应力强 度因子。等效热导率可用两块平行板，中间有不同厚度的间隔或不同的导热介质时的实 验量测而得。解析结果和实验结果吻合良好。对某实际工程的计算结果表明，由充满导 热介质的裂缝干扰稳定温度场而引起的应力强度因子远小于裂缝面绝热假定引起的应力 强度因子值。
For the hydraulic concrete engineering practice often encountered open crack or slit containing different materials with the concrete and rock thermal conductivity of the medium, the introduction of equivalent thermal conductivity to determine the thermal fracture solution, that is solved with the seam body temperature field, Stress field or stress intensity factor. Equivalent thermal conductivity can be two parallel plates, the middle of the different thickness of the interval or different thermal conductivity of the experimental measurements derived. The analytical results agree well with the experimental results. The calculation results of a practical project show that the stress intensity factor caused by the interference of stable thermal field filled by the cracks of the heat-conducting medium is much smaller than the stress intensity factor caused by the adiabatic assumption of the fracture surface.