基于海底隧道衬砌孔隙水压力的涌水量预测方法及工程应用  

Prediction Method of Water Inflow Based on Pore Water Pressure in Undersea Tunnel Lining and Its Engineering Application

作　　者：陈云娟[1,2] 王乐宁 周宗青 贾润枝 杨卓 罗平利 刘梦悦 CHEN Yunjuan;WANG Lening;ZHOU Zongqing;JIA Runzhi;YANG Zhuo;LUO Pingli;LIU Mengyue(School of Civil Engineering,Shandongjianzhu University,Jinan 250101,China;Key Laboratory of Building Structural Retrofitting and Underground Space Engineering(Shandong Jianzhu University),Ministry of Education,Jinan 250101,China;Qilu College of Transportation,Shandong University,Jinan 250101,China;China National Chemical Communications Construction Group Co.,LTD.,Jinan 250102,China;Shandong Highway Engineering Technology ResearchResearch Center Co.,LTD.,Jinan 250102,China)

机构地区：[1]山东建筑大学土木工程学院,山东济南250101 [2]山东建筑大学,建筑结构加固改造与地下空间工程教育部重点实验室,山东济南250101 [3]山东大学齐鲁交通学院,山东济南250101 [4]中化学交通建设集团有限公司,山东济南250102 [5]山东省公路工程技术研究中心有限公司,山东济南250102

出　　处：《应用基础与工程科学学报》2024年第1期288-300,共13页Journal of Basic Science and Engineering

基　　金：国家自然科学基金面上项目(42172310);山东省高等学校“青创科技计划”(2019KJG015)。

摘　　要：为获取海底隧道的环向涌水量,以海底隧道衬砌背后孔隙水压力分布为主线,在达西定律的基础上推导了与孔隙水压力相关的涌水量预测公式,公式与隧道尺寸、隧道初衬渗透系数相关,充分考虑了支护结构外缘水压力的影响,进而得到隧道洞内各处涌水量值,将涌水量计算值与现场测量值进行对比,进一步验证了公式的准确性.研究结果表明,隧道开挖时渗流场影响范围集中在隧道主洞左右各3倍洞径内,主要影响范围集中在洞周2倍洞径内.隧道开挖瞬间,洞周渗流场呈漏斗状分布,直至隧道开挖贯通.围岩性质越差,其隧道衬砌背后孔隙水压力越大,仰拱处孔隙水压力普遍大于拱顶,最大孔隙水压力一般出现在边墙与仰拱交界处.通过编译涌水量预测公式,得到隧道的涌水量,并将其与隧道现场实际情况对比,证实了公式的准确性.该涌水量预测方法为海底隧道现场施工提供了理论支撑.In order to obtain the hoop water inflow of the undersea tunnel,the pore water pressure distribution behind the undersea tunnel lining is taken as the key factor,a prediction formula relating to pore water pressure is then derived,employing Darcy's law as the basis.This formula takes into account the tunnel's dimensions and the permeability coefficient of the tunnel lining,while also thoroughly incorporating the influence of water pressure behind the supporting structure.Subsequently,water inflow values for each part of the tunnel are computed and compared against field data to validate the formula's accuracy.The results show that the influence range of seepage field caused by tunnel excavation in FLAC3D is concentrated in three times diameter of the tunnel,and the main influence range is concentrated in two times diameter around the tunnel.During excavation,the seepage field around the tunnel presents a funnel-shaped distribution until the excavation is completed.The lower the surrounding rock quality,the higher the pore water pressure behind the tunnel lining.The pore water pressure at the invert typically surpasses that at the arch,and the maximum pore water pressure generally occurs at the junction between the side wall and the invert.By comparing the water inflow calculated by prediction formula with the actual situation of the field,the accuracy of the formula is confirmed.The water inflow prediction formula has certain guiding significance for the water inflow prediction during the construction of the undersea tunnel.

关 键 词：海底隧道 孔隙水压力 达西定律 涌水量预测 渗流场 

分 类 号：TU452[建筑科学—岩土工程]