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近年来,我国修建的长大隧道经常遭遇高压地下水作用,隧道围岩中渗流场与应力场存在着耦合作用。对于高水压隧道而言,按照耦合过程中围岩的破坏情况,可以分为变形过程中的耦合作用和破裂过程中的耦合作用。如果只考虑隧道开挖后围岩的变形,则渗流-应力耦合作用可概括为天然充填物变形、无充填裂隙接触变形、裂隙时效变形和人工充填物变形等模式。考虑隧道开挖过程中围岩的破坏,则渗流-应力耦合作用可以概括为卸荷和水力劈裂裂隙模式。在隧道二次应力场中,变形和破裂过程相伴而生,耦合作用模式的建立可以为隧道设计、施工及地质灾害防治提供明确的概念模型和参考依据。
In recent years, the long and large tunnels built in our country often suffer from high pressure groundwater, and the coupling between the seepage field and the stress field in the surrounding rock of tunnels. For high-pressure tunnel, according to the destruction of surrounding rock during the coupling process, it can be divided into the coupling effect in the deformation process and the coupling effect in the rupture process. If only the deformation of surrounding rock after tunneling is considered, the seepage-stress coupling can be summarized as the deformation of natural filling, the contact deformation of unfilled crack, the crack aging crack and the deformation of artificial filling. Considering the failure of surrounding rock during tunnel excavation, seepage-stress coupling can be summarized as unloading and hydraulic fracturing modes. In the secondary stress field of the tunnel, the deformation and rupture process come into being. The establishment of coupling mode can provide a clear conceptual model and reference for tunnel design, construction and prevention of geological disasters.