大直径长距离输水隧洞静水压试验方案研究

发布时间：2018-02-26 08:01

本文关键词： 静水压试验渗漏检验试验参数输水隧洞南水北调工程　出处：《人民黄河》2017年04期 　论文类型：期刊论文

【摘要】：北京市南水北调配套工程东干渠输水隧洞为内径4.6 m、长44.7 km的双层复合衬砌结构有压输水隧洞,如何检验工程质量、有效节约利用南水北调水资源是关系工程建设成败的重要问题,但目前尚无规范对此类规模隧洞的静水压试验方法和指标做出具体规定。为了研究检验工程质量的量测方法和验收标准,通过分析东干渠隧洞工程特点对既有规范的适用性,借鉴类似工程水压试验经验,研究并制定了输水隧洞静水压试验充水、加压、观测、排水各环节方案,以及静水压试验段分区长度、边界条件,制定了试验压力和渗水量标准,确定了观测位置和设备,设计了详细可行的试验分段检验步骤。现场试验表明,该输水隧洞的渗漏量小于控制标准,说明工程质量合格。整体试验方案具有较强的可行性,提出的试验条件和参数有较强的针对性,为类似结构和规模的隧洞工程提供了科学、合理、可靠的渗漏检验方法。
[Abstract]:In Beijing South-to-North Water transfer Project, the water conveyance tunnel in the east trunk canal is a double-layer composite lining tunnel with an inner diameter of 4.6 m and a length of 44.7 km. How to check the quality of the project? Effective conservation and utilization of water resources for South-to-North Water transfer is an important issue related to the success or failure of the project construction. However, there is no specific specification for the hydrostatic pressure test method and index of this kind of tunnel. In order to study the measurement method and acceptance standard for the quality of the tunnel, the applicability of the characteristics of the tunnel in the east trunk canal to the existing codes is analyzed. Based on the experience of water pressure test in similar projects, the water filling, pressure, observation and drainage schemes of hydrostatic pressure test of water conveyance tunnel are studied and formulated, as well as the partition length and boundary conditions of hydrostatic pressure test section, and the standards of test pressure and water seepage are worked out. The observation position and equipment are determined, and the detailed and feasible test steps are designed. The field test shows that the leakage of the tunnel is less than the control standard, which indicates that the quality of the project is up to standard, and the overall test scheme is more feasible. The proposed test conditions and parameters have strong pertinence, which provides a scientific, reasonable and reliable method for tunnel engineering of similar structure and scale.
【作者单位】：北京市水利规划设计研究院;
【分类号】：TV672.1

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