基于树根桩地基加固法的井塔纠偏方案  

Correction scheme of auxiliary shaft tower based on foundation reinforcement method using root piles

作　　者：曹明星 高永涛[1] 周喻[1] CAO Mingxing;GAO Yongtao;ZHOU Yu(Key Laboratory of Ministry of Education for Efficient Mining and Safety of Metal Mine,University of Science&Technology Beijing,Beijing 100083,China)

机构地区：[1]北京科技大学金属矿山高效开采与安全教育部重点实验室,北京100083

出　　处：《中南大学学报（自然科学版）》2020年第10期2906-2916,共11页Journal of Central South University:Science and Technology

基　　金：中央高校基本科研业务费专项资金资助项目(FRF-TP-18-016A3);国家青年科学基金资助项目(51504016)。

摘　　要：以三山岛金矿副井井塔楼偏斜工程为研究背景,提出采用树根桩对井塔进行加固纠偏的方案。通过考虑地下水及树根桩长度对工后残余沉降的影响,采用修正后的Boussinesq解和FLAC3D软件对井塔基础树根桩加固纠偏过程中的竖向沉降量进行对比分析。研究结果表明:增大树根桩的加固长度可有效减小工后残余沉降,但超过一定范围会导致施工费用增加较多,32.5 m长度的树根桩具有经济合理性;地下水对井塔地基的竖向沉降有显著影响;树根桩的加固作用可有效减小地下水对井塔地基土体造成的影响。树根桩加固纠偏法可以有效运用于矿山井塔纠偏。Taking the deviation engineering of the auxiliary shaft tower of Sanshandao Gold Mine as the example,the scheme of using the root piles to reinforce and correct the auxiliary shaft tower was proposed. Considering the influence of groundwater and the length of the root piles on the post-construction residual settlement, the corrected Boussinesq solution and FLAC3D software were combined to analyze the vertical displacement during the rectification process of the reinforcement. The results show that increasing the reinforcement length of the root piles can effectively reduce the post-construction residual settlement, which leads to more construction costs when exceeding a certain range. The economically reasonable length of the root piles is 32.5 m. Groundwater has significant impact on the vertical settlement of the foundation. The reinforcement of the root piles can effectively reduce the impact of groundwater on the foundation soil of the tower. The reinforcement method that uses root piles can be effectively applied in the correction of mine shafts.

关 键 词：井塔纠偏 树根桩 工后残余沉降 BOUSSINESQ解 流固耦合 

分 类 号：TU472[建筑科学—结构工程]