宜万铁路大支坪隧道+990岩溶治理技术

Treatment techniques for +990 Karst of Dazhiping Tunnel of Yichang-Wanzhou Railway

主要介绍宜万铁路大支坪隧道DK133+990岩溶异常体水文地质特征、岩溶发育规模、高压富水溶腔突水突泥经过及特点,并根据溶洞工程、水文地质条件及历次突水突泥机理,综合考虑施工及运营安全等多种因素,遵循"释能降压、注浆加固、超前支护、综合治理"的原则进行溶洞治理。

This paper mainly introduced Yichang-Wanzhou Railway Dazhiping Tunnel DK133 ＋ 990 karst excrescent body＇ s hydrogeology characteristics, karst development scale, water inrush and mud burst processes and characteristics of high-pressure water-rich cavern. According to karst cave project, hydrogeology condition and water inrush and mud burst mechanisms, cave processing should comprehensively take many factors, such as construction and operation safety, ect. into consideration, and abide by the principle of ＂releasing energy to reduce pressure, reinforcing by grouting, supporting in advance and processing comprehensively＂.