论21世纪我国城市地下空间的开发利用

在分析我国城市发展状况的基础上,论述了开发利用城市地下空间资源对建设立体化生态城市,解决环境、资源、人口危机,实现城市可持续发展的重要作用;介绍了城市地下空间资源开发利用的主要形式并指出我国城市地下空间开发利用中有待解决的问题。     

浅埋洞室锚喷参数的回归正交有限元试验分析研究

通过三维有限元数值模拟计算,分析了某浅埋洞室稳定性指标的主要影响因素和锚喷支护参数与洞室顶底板相对位移间的关系并确立了二者之间的经验公式,为工程的设计施工提供了理论指导     

Experimental Research on Early-Age Property of High-Performance Concrete Column by Embedded Sensors

This paper aims at monitoring the autogenous shrinkage (AS) of a high-performance concrete (HPC) column specimen using an embedded strain gauge just after concrete pouring. A real size specimen (40 cm x40 cra x 100 cm ) was made to simulate the structural members in construction site. The results show that the amount of HPC AS is comparable to that of drying shrinkage and even larger than it, so AS can not be omitted for HPC. By comparing the plain I-IPC and reinforce, d HPC specimens, the influences of reinforced bars on autogenous shrinkage and temperature distribution were obtained.