›› 2018, Vol. 39 ›› Issue (5): 1767-1774.doi: 10.16285/j.rsm.2016.0173

• 基础理论与实验研究 • 上一篇    下一篇

城市隧道动、静水头作用下的渗流模型试验

李 铮1, 2,何 川2,杨赛舟2,杨文波2   

  1. 1. 重庆市城市建设投资(集团)有限公司,重庆 400015;2. 西南交通大学 交通隧道工程教育部重点实验室,四川 成都 610031
  • 收稿日期:2016-01-21 出版日期:2018-05-11 发布日期:2018-06-12
  • 通讯作者: 杨文波,男,1985年生,博士,副教授,主要从事隧道与地下工程方面的教学和研究工作。E-mail: yangwenbo1179@hotmail.com E-mail:lizheng872@163.com
  • 作者简介:李铮,男,1987年生,博士,高级工程师,主要从事隧道与地下工程方面的管理和研究工作。
  • 基金资助:

    国家重点研发计划(No. 2016YFC0802210);国家自然科学基金青年基金(No. 51408494, No. 51678499);四川省交通科技项目(No. 110109066)。

Seepage model experiments on urban tunnel influenced by dynamic and hydrostatic head

LI Zheng1, 2, HE Chuan2, YANG Sai-zhou2, YANG Wen-bo2   

  1. 1. Chongqing City Construction Investment(Group) Co., Ltd., Chongqing, 400015, China; 2. MOE Key Laboratory of Transportation Tunnel Engineering, Southwest Jiaotong University, Chengdu, Sichuan, 610031, China
  • Received:2016-01-21 Online:2018-05-11 Published:2018-06-12
  • Supported by:

    This work was supported by the National Key R & D Plan(2016YFC0802210), the Young Foundation of the National Natural Science Foundation of China (51408494, 51678499) and the Traffic Science and Technology Project of Sichuan Province(110109066).

摘要: 依托毗邻深圳水库的深圳东部过境高速公路连接线工程,研制了以控制渗透系数为核心的围岩-支护体系新型相似材料,利用自制渗流模型试验系统,研究不同高度的动、静作用水头对水压力、排水量及渗流场的影响。试验表明:地下水位较高时,注浆圈内壁经历块状润湿、浸润线状态、完全湿润、拱腰以上挂满水珠、间断性水流线等过程,而随着作用水头的降低,渗流速度减慢,渗流时间大幅增加;随着静水头高度降低,各特征点水压力呈近似线性下降,且作用水头越小,相同位置二衬和注浆圈背后的水压力值更加接近,而隧道排水量测试的离散性也越小;动水头作用下,水压力随时间变化有明显的滞后性,其时间效应不利于结构稳定,而动水头下降过程中浅埋处更易受到影响,需加强隧道顶部的承载及抗渗设计,隧道排水量值随动水头下降呈减小的趋势,且降低相同水位差所需的时间越长。

关键词: 水库下游, 城市隧道, 渗流模型, 动、静水头, 水压力, 排水量

Abstract: A new type of similar material for the surrounding rock-support system was developed to control the permeability coefficient, based on the Shenzhen East Transit Expressway Link Project adjacent to Shenzhen reservoir. A self-made seepage model test device was used to analyse the effects of dynamic and hydrostatic heads with different heights on water pressure, water discharge and seepage field. The results showed that when the groundwater level was relatively high, the inner walls of grouting ring underwent several procedures such as heavy wetting, the occurrence of saturation line, thoroughly wetting, overhanging water drops above the arch and intermittent water flow. With the decrease of the water head, the seepage velocity slowed down and the seepage time increased greatly. The water pressure at each feature point reduced approximately linearly with decreasing the height of the hydrostatic head. Besides, when the hydrostatic head became lower, the water pressure values at the same position of secondary lining and grouting ring were closer, and the dispersion of tunnel water discharge test was also smaller. Under the action of the dynamic head, the water pressure presented an obvious time lag, and the time effect was not conducive to the stability of the structure. The shallow buried areas were more easily affected by the decrease of the dynamic head, which indicated that it was necessary to strengthen the capacity and anti-seepage design of the tunnel roof. The water discharge of the tunnel exhibited a decreased tendency with the decrease of the dynamic head, and it took a longer time to reduce the same water-head difference.

Key words: downstream area of reservoir, urban tunnel, seepage model, dynamic and hydrostatic head, water pressure, water discharge

中图分类号: 

  • TU 458

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