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（廣東省建筑科學(xué)研究院集團(tuán)股份有限公司，廣州 510500）

［摘要］依托廣州南站汽車客運(yùn)站深基坑工程，針對(duì)原支護(hù)方案存在的問題與不足，對(duì)大面積開挖的深基坑支護(hù)設(shè)計(jì)方案進(jìn)行了優(yōu)化設(shè)計(jì)。介紹了預(yù)應(yīng)力魚腹式鋼支撐的工作原理與優(yōu)點(diǎn)，利用有限元軟件MIDAS/GTS對(duì)優(yōu)化后支護(hù)方案進(jìn)行了數(shù)值模擬，并對(duì)優(yōu)化后支護(hù)方案與原支護(hù)方案進(jìn)行對(duì)比分析，驗(yàn)證了優(yōu)化后支護(hù)方案的合理性，也為預(yù)應(yīng)力魚腹式鋼支撐這種綠色環(huán)保的支護(hù)形式在實(shí)際工程中的應(yīng)用提供了一定的參考。

［關(guān)鍵詞］深基坑； 預(yù)應(yīng)力魚腹式鋼支撐； 優(yōu)化設(shè)計(jì)； 數(shù)值模擬

中圖分類號(hào)：TU753文獻(xiàn)標(biāo)識(shí)碼：A文章編號(hào)：1002-848X(2018)09-0103-05

Application of prestressed fish-bellied steel brace in optimization design for deep foundation pit support scheme

Liu Jie

(Guangdong Provincial Academy of Building Research Group Co., Ltd., Guangzhou 510500, China)

Abstract:Based on the deep foundation pit project of Bus Terminal of Guangzhou South Railway Station, aiming at the problems and shortcomings in the original support scheme, the design scheme of deep foundation pit support for large area excavation was optimized. The working principle and advantages of prestressed fish-bellied steel braces were introduced. The optimized support scheme was simulated by using finite element software MIDAS/GTS. The optimized support scheme was compared with the original support scheme to verify the rationality of the optimized support scheme. It also provided a reference for the application of green and environmental protection form of prestressed fish-bellied steel braces in the practical engineering.

Keywords:deep foundation pit; prestressed fish-bellied steel brace; optimization design; numerical simulation

作者簡(jiǎn)介：劉杰，碩士，工程師，Email:yingyisi2016@163.com。