| 顾展飞,张天旗,曲啸,岳玮琦,李娟.管线渗漏诱发粉土地面沉降试验研究[J].矿产勘查,2026,17(3):566-574 |
| 管线渗漏诱发粉土地面沉降试验研究 |
| Experimental study on ground collapse of silt induced by pipeline leakage |
| 投稿时间：2025-03-11 |
| DOI：10.20008/j.kckc.202603013 |
| 中文关键词: 管线渗漏 地面沉降 模拟试验 粉土 |
| 英文关键词: pipeline leakage ground collapse simulation test silt soil |
| 基金项目:本文受河南省重点研发与推广项目(262102320060)、河南省重点研发专项(251111321700)、郑州航空工业管理学院2025年实验室开放项目(ZHSK25-37)联合资助。 |
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| 中文摘要: |
| 为弄清管线渗漏引起地面沉降的影响因素与演化机制，进而提出合理的防治对策。本文以粉土地区地下管线为研究对象，通过室内模拟试验，研究了不同渗漏时长、流速以及不同填土材料对地面沉降过程的影响机制。主要研究结论如下:①管道破损后，随着渗漏时间增长，在水流冲刷作用下 5 min时形成了空洞， 10 min时空洞逐渐变成椭圆形，30 min时空洞呈现椭球形，35 min时地面发生了塌陷。②管线内水流速在 1.9～2.0 m/s时，水流冲刷所形成空洞的长度和宽度尺寸较小，其长度、宽度、高度约为 1.7 cm、1.1 cm、0.7 cm；但水流速增大到 2.3 m/s时，形成空洞的长度、宽度、高度均大幅度增加 0.4 cm以上。③向管道下方土体中掺入石子、粉煤灰、白色矿渣、废弃混凝土块等材料改良粉土，可以有效减小渗流引起的空洞。其中加入废弃混凝土块对空洞尺寸影响最大，该工况下水流冲刷形成空洞的长度、宽度、高度分别减少 0.4 cm、0.5 cm、 |
| 英文摘要: |
| In order to clarify the influencing factors and evolution mechanism of land subsidence caused bypipeline leakage, and then put forward reasonable prevention and control countermeasures. In this paper, the under-ground pipeline in silt area is taken as the research object to explore the influence mechanism of different leakagetime, flow velocity and filling material on the process of land subsidence. Through the indoor leakage test, the influ-ence of different leakage time, different flow velocity and different filling around the pipeline on the process of landsubsidence is simulated. The main research conclusions are as follows: ①After the pipe breakage, with the growthof seepage time, the cavity was formed at 5 min under the action of water flow scouring, the cavity gradually became ellipsoid at 10 min, the cavity showed ellipsoid shape at 30 min, and the soil body collapsed at 35 min. ②When theflow velocity of the pipeline is 1.9-2.0 m/s, the length and width of the cavity formed by water erosion are small, andthe length, width and height are about 1.7 cm, 1.1 cm and 0.7 cm. However, when the flow rate of the pipeline in-creases to 2.3 m/s, the length, width and height of the cavity are greatly increased by more than 0.4 cm. ③Mixingstones, fly ash, white slag, waste concrete and other materials into the soil below the pipeline to improve silt can ef-fectively slow down the cavity caused by seepage. Among them, the addition of waste concrete blocks has the great-est influence on the size of the cavity, and the length, width and height of the cavity formed by water erosion are re-duced by 0.4 cm, 0.5 cm and 0.6 cm respectively. The study can provide theoretical basis and technical support forthe prevention and control of geological disasters such as ground subsidence in the silt soil area. |
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