中高水头船闸渗压力监测及成果分析研究

The Detection of Seepage Pressure in High-Head Navigation Lock Area and Result Analysis

中高水头船闸岩基合理的渗透力及承载力是船闸安全的基础。以富春江船闸扩建改造工程为例,通过对船闸底板下岩基内渗压力的观测分析,得出了岩基封闭区域内底板下的渗压值包括外界水体直接渗透压力和上部结构荷载引起的岩隙水压两部分组成的特性。在船闸运营期,渗压值增加会提高岩基的承载力,对船闸有利,在检修期,通过中高水头船闸岩基防渗排水减压体系,能有效降低船闸底板的扬压力。

The rational seepage force and bearing capacity of high-head navigation lock area’s batholith are important to the safety of ship lock. Taking reconstruction and extension project of Fuchun River navigation lock as the example, the observation and analysis in the seepage force inside the batho-lith under the ship lock baseboard are established. Based on this, the features of osmotic pressure value under baseboard within batholith closed region are understood, including direct osmotic pressure from external water body and hydraulic pressure in rock gap caused by upper structure loads. During the ship lock operating period, the raise of seepage force value is advantageous for the lock by increasing bearing capacity of batholith. On the other hand, during the overhaul period, uplift pressure of ship lock baseboard could be reduced efficiently through the anti-seepage drai-nage decompression system of high-head navigation lock area’s batholith.