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坡桑隧道系新建沪昆客专长大隧道之一,由中铁二十局集团公司第六工程公司承建,属于高压富水隧道。“以堵为主”的帷幕注浆法处治,历时长,收效一般,施工风险高。释能降压技术“以排为主、排堵结合、因地制宜、综合制理”的隧道施工原则和坚持“物探先行、钻探验证”的预报程序,与传统的帷幕注浆工法相比,成本更低、工期更短、安全可靠。释能降压处治高压富水溶腔,通过溶腔查找、近溶腔、定溶腔范围、开溶腔、治溶腔等几个阶段,将高压富水溶腔的处理问题化暗为明,大大降低了施工风险,并加快了穿越岩溶强烈发育段的进度。
Pondsang Tunnel is one of the newly built large tunnels of Shanghai-Kunming Specialties, which is constructed by No. 6 Engineering Company of China Railway 20th Corporation and belongs to high-pressure water-rich tunnels. “To block-based ” curtain grouting method of treatment, over a long period of time, the general effect, high construction risk. Energy-saving technology “to row the main line with the combination of drainage, according to local conditions, integrated rationale,” the principle of the tunnel construction and adhere to the “geophysical exploration, drilling validation,” the forecast program, and the traditional curtain grouting method Than the lower cost, shorter construction period, safe and reliable. Release to pressure treatment of high pressure water-soluble cavity, through the cavity to find, near the cavity, the cavity of the cavity, open the cavity, cure cavity and several other stages, the problem of handling the high pressure water-soluble cavity dark, bright Reduce the construction risk, and accelerate the progress of intense karst development.