基于改进层次-灰色关联法优选的深基坑方案设计

Design of Deep Foundation Pit Scheme Based on Improve AHP-Grey Correlation Method Optimization

为了避免临时性基坑工程可靠性不足和经济浪费,优选降水支护方案具有重要意义。以洛阳市君河湾小区深基坑项目为分析背景,建立了双层准则多目标层次结构评价体系,通过改进传统层次分析法的标度,结合灰色关联法建立方案优选模型,提高了关联度数值结果的精度,从而准确优选出最佳降水方案:管井降水;最佳支护方案:桩锚支护。依次对基坑降水和支护方案给出详细的设计过程,并采用理正软件验算分析,结果均满足规范要求。

In order to avoid the lack of reliability and economic waste of temporary foundation pit,it is important for optimizing the dewatering support scheme.Taking the deep foundation pit project of Junhewan Community in Luoyang city as the analysis background,a two-level criterion multi-objective hierarchical evaluation system is established.By improving the traditional AHP scale,combined with the grey correlation method,the optimal model was established,and improving the accuracy of the correlation.So the best precipitation scheme:pipe well precipitation;Support scheme:pile-anchor support.The detailed calculation process of foundation pit dewatering and supporting is given.The results of the Lizheng software checking and field testing all meet the requirements of the code.