| 贵州裸露型岩溶地下河系统污染防治施工技术 —以遵义坪桥地下河系统污染防治工程为例 |
| 投稿时间：2024-01-06 修订日期：2024-04-14 点此下载全文 |
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| 基金项目:贵州省科学技术厅科研项目地下河走向物理化学探测及数字地图绘制技术集成与应用（编号：黔科合成果[2023]重大006）；贵州省地质矿产勘查开发局重大科研项目“贵州岩溶地下水环境污染勘查与地学治理关键技术研究”（编号：黔地矿科合[2022]2号） |
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| 中文摘要:裸露型岩溶区岩溶强发育、水文地质条件复杂，受污染的地下河系统通道隐蔽性强、污染防治难度大。本文以坪桥地下河系统污染防治工程为例，在近污染源的主径流通道实施“地下水防渗帷幕+污水抽排”工程措施实现近源截排。施工面临岩溶破碎地层易掉块卡埋钻、钻效低及岩溶强发育段浆液扩散距离远和材料浪费大等难题。通过配备适宜的钻进工艺，采取纯压式灌浆、水泥砂浆灌填溶洞、低压限量及速凝浆液灌注等灌浆控制和自动感应抽水措施，保证了工程质量和进度，实现了源头治理污染地下水的目的。“近源截排”对类似水文地质条件下地下水污染防治提供可借鉴复制的地学治理模式。 |
| 中文关键词:裸露型岩溶 地下河系统污染防治 防渗帷幕 近源截排 浆液流距控制 智能抽水 地学治理 |
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| Pollution Prevention and Construction Techniques for Exposed Karst Underground River Systems in Guizhou—Case Study: Pollution Prevention Project for the Pingqiao Underground River System in Zunyi |
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| Abstract:In exposed karst areas, karst development is strong and hydrogeological conditions are complex, making the pollution prevention of contaminated underground river systems particularly challenging due to the concealed nature of their channels. Taking the Pingqiao Underground River System's pollution prevention as an example, "underground impermeable curtain + sewage pumping and drainage" and "source～near interception and drainage" engineering measures were implemented in the main flow channels near the pollution source. The construction faced difficulties such as blo
ckages and low efficiency due to complex karst fragmentation, excessive waste of materials due to long grout flow distances in strong karst segments, and the need to pump and drain contaminated groundwater in real～time. Effective technical measures such as suitable drilling techniques, pure pressure grouting, cement mortar grouting to fill dissolution voids, low-pressure and limited～volume grouting,and automatic induction pumping were employed to control the flow distance of the grout and to ensure the progress and quality of the project, Achieved the treatment of groundwater from the vicinity of the source of pollution.The "source～near interception and drainage" provides a replicable geoscientific management model for groundwater pollution prevention under analogous hydrogeological conditions. |
| keywords:Exposed karst Underground river system pollution prevention Impermeable curtain Source～near interception and drainage Grout flow distance control Intelligent pumping Geoscientific management |
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