人工降水影响下富水砂层冻结施工技术应用  

Application of freezing method in water-rich sandy stratum affected by groundwater pumping

作　　者：付财 Fu Cai(Beijing China Coal Mine Engineering Co.,Ltd.,Beijing 100013,China;Institute of Mine Construction,Tiandi Science&Technology Co.,Ltd.,Beijing 100013,China)

机构地区：[1]北京中煤矿山工程有限公司,北京100013 [2]天地科技建井研究院,北京100013

出　　处：《山西建筑》2020年第10期73-75,共3页Shanxi Architecture

摘　　要：以南昌某地铁联络通道冻结工程为背景,在地下水头高、江水补给快、地层渗透性高以及周边人工降水不可调和的复杂情形下,针对冻结壁不交圈问题,提出了复杂工况条件下判断及解决冻结壁不交圈问题的冻结施工技术。该技术具体包括纵向测温、地下水流速流向测试、注浆降低地层渗透性以及双排管强化冻结等一系列技术措施。通过探孔检验,证明了该技术能有效解决因人工降水等引起的冻结壁不交圈的问题,达到了较为理想的冻结效果。According to the complicated environment in the construction of a connecting passage in Nanchang metro,such as high water head,quick river water supply,high permeability and irreconcilable groundwater pumping,unclosed frozen wall judging and settling technology proposed aiming at problems happened in freezing construction.This method contains a series of technical measures,such as internal temperature measurement,test of flow velocity and flow direction,soil permeability decreasing grouting and double row pipe strengthened freezing.Through test of checking holes,it is clear that unclosed frozen wall problem could be effectively resolved by the technology,thus achieving the ideal freezing effect.

关 键 词：联络通道 人工降水 双排管冻结 

分 类 号：TU472.9[建筑科学—结构工程]