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一、引言浅基托换通常分小段进行。正如斯莫尔契克(Smoltczyk)教授所述:“……浅基托换一般用于承重墙底部,可分段挖槽。并砌新基础。每段槽宽不得超过1.25m,槽间距离应不小于三倍槽宽。”分段槽宽太小在结构处理和施工过程中常会遇到很大的困难。为了克服这些困难,在合肥工业大学老中楼托换基础工程中,最大分段槽宽达44.8m。为了确保安全,必须设置支撑系统,以承受上部结构的重量。(设置支撑系统后,“分段槽宽”可以增大,故称“分段槽长”更恰当。但本文为了与“十届”会议的提法一致起见仍作“分段槽宽”。)
I. Introduction Shallow basal changes are usually performed in small segments. As Professor Smoltczyk stated: "...Shallow base exchange is generally used at the bottom of the bearing wall, and can be grooved in sections and built on a new foundation. The width of each groove must not exceed 1.25 m. It should not be less than three times the width of the slot.” The slot width is too small to encounter great difficulties in the process of construction and construction. In order to overcome these difficulties, the maximum slot width is 44.8m in the foundation project of the old Zhong Lou Lou of Hefei University of Technology. To ensure safety, a support system must be set up to withstand the weight of the superstructure. (After setting up the support system, the “slot width” can be increased, so “segment length” is more appropriate. However, for the sake of consistency with the “Tenth” meeting, this paper still regards “slot width”. )