高耸构筑物地基变形和风振对爆破拆除安全性的影响

本文对高耸构筑物控爆前的倾斜、失稳的诱发因素(地基变形、风振)进行了探讨,当高耸构筑物向倾斜相反方向倒塌时,必须从地基、基础、上部结构三者之间的变形协调条件和静力平衡条件综合考虑进行爆破设计,施爆时必须采取一定的技术措施.

A STUDY ON THE DEMOLISHING SECURITY BEFORE BLASTING A TALL TOWER-SHAPE STRUCTURES

This paper is mainly engaged in the study of the unstable factors of the leaning tall tower shape structures. A structure of such nature under cross wind induced vibrations is supposed to be divided into several portions, each at the same time affected by a variety of vibrations, some under resonance and others under random vibrations. The method suggested in this paper intends to provide an introduction to a comprehensive calculation and analytic method to estimate the cross wind induced vibrations of a circular tall structure. When a tall building collapses in the opposite directions, it can be estimated through an analysis of the comprehensive conditions of the deformed coordination from the supporting balance of the ground, foundation and upper structure till the blasting design. All effective technical measures should be taken based on the well thought of blasting design.Some basic information must be considered before blasting.Such as (1) whether the structure is inclined,and the causes of inclintion,inclined direction and degree,deviant of center of gravity;(2) the specification of the structure;(3) the structure information,ambient conditions,failure information,and the local maximum wind velocity;(4) the symmetry of inclined direction;(5) the connection conditions of the structure and the basic steel reinforced concrete.