深基坑支護(hù)結(jié)構(gòu)優(yōu)化設(shè)計(jì)探討*
武亞軍1 盧文閣2 欒茂田1 侯仰杰3
- 摘 要
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武亞軍1 盧文閣2 欒茂田1 侯仰杰3(1 大連理工大學(xué)土木工程系,海岸和近海工程國(guó)家重點(diǎn)實(shí)驗(yàn)室,116024; 2 長(zhǎng)春科技大學(xué)工程技術(shù)學(xué)院 130026; 3 天津市大港油田勘察設(shè)計(jì)院 300280)
[提要] 使用彈性支點(diǎn)法,從綜合考慮穩(wěn)定、強(qiáng)度、變形的角度討論了單支撐、雙支撐-排樁基坑支護(hù)結(jié)構(gòu)支護(hù)點(diǎn)的優(yōu)化問題,通過(guò)兩個(gè)實(shí)例分析,說(shuō)明了單純考慮樁身強(qiáng)度與穩(wěn)定的不足,以及實(shí)際工程中考慮優(yōu)化的重要意義和可行性。
[關(guān)鍵詞] 深基坑 彈性支點(diǎn)法 支護(hù)點(diǎn)優(yōu)化The FEM of beams on elastic subgrade is applied to optimize the bracing points of single and double branch-piles deep foundation supporting technology, by which the stability, strength and deformation
can be considered synthetically. The limitation of evaluating the piles' strength and stability is illustrated by two examples. The significance of optimal design of bracing structures for deep pit is given.
Keywords: deep foundation pit; FEM; beam; elastic subgrade; optimization; bracing points
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