细颗粒沉积物分布区地下水源热泵抽灌井施工工艺探讨

发布时间：2018-03-30 18:01

本文选题：泵吸反循环钻探　切入点：细颗粒　出处：《水文地质工程地质》2017年01期

【摘要】：郑州市广泛分布着第四系松散堆积物,其特点是颗粒细,厚度大,含水介质主要为细颗粒的砂层。由于地下水富水性好,目前郑州市浅层地温能开发利用主要以地下水地源热泵工程为主。传统正循环泥浆钻探工艺施工的地温空调井,普遍存在洗井困难、涌水量和回灌量偏小的问题,在很大程度上限制了地下水地源热泵工程的推广使用。针对这一问题,本次采用泵吸反循环工艺施工地温空调井。施工过程及试验数据对比分析表明,在细颗粒松散沉积物分布区,采用泵吸反循环钻探工艺施工地温空调井,对提高施工进度、增大出水量和回灌量等方面具有显著优势,可以为类似地区地温空调井的施工提供借鉴。
[Abstract]:Because the groundwater is rich in water, the development and utilization of shallow geothermal energy in Zhengzhou is mainly based on the groundwater ground source heat pump project.The problems of difficult well washing, small water inflow and small recharge are common in the conventional drilling technology of normal circulation mud drilling, which limits the application of ground-source heat pump engineering to a great extent.In order to solve this problem, this paper uses pump suction reverse circulation process to construct ground-temperature air-conditioning well.The comparison and analysis of construction process and test data show that in the distribution area of fine granular loose sediment, the application of pump suction reverse circulation drilling technology in the construction of geothermal air conditioning wells has remarkable advantages in improving the construction progress, increasing the water output and recharging capacity, and so on.It can be used for reference for the construction of air conditioning wells in similar areas.
【作者单位】：河南省地质调查院;地下清洁能源勘查开发技术创新战略联盟;河南省地质矿产勘查开发局第一地质环境调查院;
【基金】：郑州市浅层地温能调查评价(1212011120056、1212011220833)
【分类号】：P314;P641.25

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