首页> 中文期刊> 《煤炭学报》 >深厚冻结基岩中新型单层井壁的施工技术与混凝土应变实测

深厚冻结基岩中新型单层井壁的施工技术与混凝土应变实测

         

摘要

Based on the project example of Hulusu Coal Mine in Hujierte mining area, construction technology and mo- nitoring analysis on concrete strain of a first new singlelayer shaft lining was carried out in bed rock during freeze sinking. Some main technical difficulties in construction process were analyzed in detail and the concrete quality con- trol standards of shaft lining were given. In-situ measurement results reveal that concrete strain is the combined action result of freezing pressure and shaft lining temperature. The process of concrete strain can be described by 4 periods: OA period ,AB period ,BC period and CD period. At 99.6 - 149.5 days after concrete pouring, the maximum vertical compressive micro-strain reaches -190. 5 --458.0 and the maximum tangential compressive micro-strain reaches -590. 4 - -799. 1. The maximum tangential compressive micro-strain is 1.3 - 4. 2 times of vertical direction. Mean- while, the maximum tangential compressive micro-strain is not more than 25.7% of concrete ultimate compressive mi crostrain εmax Therefore, the new single-layer shaft lining of Hulusu Coal Mine is in safe status during freeze sinking.%以呼吉尔特矿区葫芦素副立井为工程实例,详细阐述了国内首个基岩冻结新型单层井壁的施工工艺和混凝土应变实测方法,对施工过程中的技术难点进行了分析,给出了井壁混凝土的质量控制指标。现场实测表明:新型单层井壁混凝土应变是冻结压力、井壁温度共同作用的结果,其变化规律可分为OA,AB,BC,CD等4个阶段;混凝土浇筑完毕后的99.6~149.5d,混凝土竖向、环向压微应变极值分别达到-190.5--458.0和-590.4--799.1;混凝土环向压微应变极值为竖向的1.3~4.2倍,且最大不超过混凝土极限压微应变估算值εmax的25.7%;凿井期葫芦素副立井单层井壁处于安钱状态.

著录项

  • 来源
    《煤炭学报》 |2012年第2期|192-199|共8页
  • 作者单位

    中国矿业大学深部岩土力学与地下工程国家重点实验室,江苏徐州221116;

    中国矿业大学力学与建筑工程学院,江苏徐州221116;

    中天合创能源有限责任公司,内蒙古鄂尔多斯017000;

    中天合创能源有限责任公司,内蒙古鄂尔多斯017000;

    中国矿业大学深部岩土力学与地下工程国家重点实验室,江苏徐州221116/中国矿业大学力学与建筑工程学院,江苏徐州221116;

  • 原文格式 PDF
  • 正文语种 chi
  • 中图分类 TD262.64;
  • 关键词

    深厚含水基岩; 新型单层井壁; 施工技术; 混凝土应变; 冻结法凿井;

相似文献

  • 中文文献
  • 外文文献
  • 专利
获取原文

客服邮箱:kefu@zhangqiaokeyan.com

京公网安备:11010802029741号 ICP备案号:京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有
  • 客服微信

  • 服务号