煤炭工程 ›› 2014, Vol. 46 ›› Issue (9): 5-7.doi: 10.11799/ce201409002

• 设计技术 • 上一篇    下一篇

混凝土水化热对白垩系地层冻结壁温度场影响的实测分析

杨更社1,孙永岗1,屈永龙2,李庆平1,李博融1   

  1. 1. 西安科技大学
    2. 西安科技大学建筑与土木工程学院
  • 收稿日期:2013-10-11 修回日期:2014-04-24 出版日期:2014-09-10 发布日期:2014-09-10
  • 通讯作者: 孙永岗 E-mail:sunyg86@163.com

Analysis of Actual Measure for Frozen Wall temperature field in Cretaceous Stratum in the influence of the hydrated heat from the concrete shaft liner

  • Received:2013-10-11 Revised:2014-04-24 Online:2014-09-10 Published:2014-09-10

摘要:

为了了解外井壁混凝土水化热对白垩系地层冻结壁温度场的影响规律,通过对新庄煤矿回风立井冻结壁的两个地层进行温度的现场监测,分析监测数据得到:外井壁混凝土浇筑后,两个地层的冻结壁内侧温度迅速升高,监测点处的温度最高点达到15.8℃;随着深度的增加,混凝土水化热对冻结壁的影响范围增大,但冻结壁维持正温的时间减少;在混凝土水化热的作用下,冻结壁的融化深度介于250~600mm之间;水化热的减少及融化区的水热在温度梯度的作用下大量向冻结区迁移,致使冻结壁内侧高温部分的温度迅速下降。可为类似工程的设计和施工提供参考。

关键词: 冻结壁, 温度场, 实测, 混凝土水化热

Abstract:

In order to understand the influence law of the hydrated heat from the concrete shaft liner to the frozen wall temperature field, through temperature monitoring in two representative horizontal layers of mine air return shaft in Xin Zhuang coal mine, analysis the monitoring data can get: the temperature soared of frozen wall inside in two horizontal layers and the highest temperature reached 15.8℃ in monitoring point after the concrete pouring of shaft liner; With the increase of depth, the influence scope increase of concrete hydration heat for the frozen wall, but the time reduced of hold positive temperature; under the action of concrete hydration heat, the melting depth of the frozen wall between 250~600mm; the reduce of concrete hydration heat and a lot of moisture-temperature migration in the action of temperature gradient from melting zone to frozen zone, causing the temperature drops rapidly of the high temperature part in the frozen wall inside. The result can provide reference for similar engineering design and construction.

Key words: frozen wall, temperature field, actual measurement, concrete hydration heat