摘要
针对偏远山区土方转运困难、地质环境复杂、采用深基础大开挖易扰动周围环境而产生次生地质灾害的特点,以及锚碇基础施工场地处于巨厚覆盖层、持力层埋藏较深、地质条件差或较为复杂、采用重力式扩大基础大开挖施工对周围环境影响较大的情况,提出了一种由地连墙构成的分体多格室锚碇基础.该基础采用了地连墙施工工艺,充分利用了基础-土体相互作用对承载力的有益影响,适当降低了对持力层的承载性能要求,大幅降低了土石方工程量和对施工过程边坡防护的要求,减小了对周围环境的不利影响,并认为在环境保护要求下,有必要采用分体多格室锚碇基础.该基础的运用可为复杂地质条件的锚碇基础选型提供参考.
Abstract
In remote mountainous areas,because of the characteristic of difficult transporting earthworks,complex geological environments,and secondary geological disasters caused by the surrounding environment disturbance by deep foundation excavation,as well as the fact that the anchor foundation construction site is in a thick cover layer,the bearing layer is deeply buried,the geological conditions are poor or complex,and the use of gravity expanded foundation excavation construction has a significant impact on the surrounding environment,a split multi-compart-ment anchorage foundation composed of diaphragm wall is proposed.This foundation adopts the construction tech-nology of diaphragm wall,which fully utilizes the beneficial influence of foundation-soil interaction on bearing ca-pacity,appropriately reduces the requirements for bearing performance of the bearing layer,significantly reduces the amount of earthwork and the requirements for slope protection during construction,and reduces the adverse im-pact on the surrounding environment.It is believed that under environmental protection requirements,it is neces-sary to adopt a split multi-compartment anchorage foundation,the application can provide reference for the selec-tion of anchor foundations with complex geological conditions.
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