【摘要】：采用有限元法模擬分析了在較大坑外堆載條件下,樁錨支護箱涵深基坑的受力規(guī)律,并通過對比四種樁錨方案的支護結(jié)構(gòu)受力狀況和過程,探討了不同應(yīng)力特點對支護結(jié)構(gòu)的影響。結(jié)果表明,堆載對基坑上層土體產(chǎn)生了很大的側(cè)向壓力,因此把首層錨索盡可能地設(shè)置在護坡樁頂,并予以加強,可以有效地控制樁的位移和內(nèi)力,而增設(shè)雙排樁對改善支護結(jié)構(gòu)內(nèi)力的效果不顯著,不建議采用。另外,錨樁受到地層的約束較弱,在水平拉力下幾乎呈平動,未能有效起到錨的作用,因此也不建議采用。
[Abstract]:The finite element method is used to simulate and analyze the stress law of the deep foundation pit of the box culvert supported by pile and anchor under the condition of loading outside the large pit, and by comparing the stress state and process of the supporting structure of four kinds of pile and anchor schemes, The influence of different stress characteristics on support structure is discussed. The results show that the surcharge has great lateral pressure on the upper soil of foundation pit. Therefore, the first layer anchor cable can be set on the top of the slope protection pile as far as possible and strengthened, which can effectively control the displacement and internal force of the pile. However, the effect of adding double row piles to improve the internal force of supporting structure is not remarkable, so it is not recommended to use. In addition, the anchor pile is weak by the constraints of the stratum, and is almost translational under the horizontal tensile force, which can not play the role of anchor effectively, therefore, it is not recommended to use it.
【作者單位】： 北京工業(yè)職業(yè)技術(shù)學院;中國水利水電科學研究院;
【基金】：北京工業(yè)職業(yè)技術(shù)學院2013年院級科研課題“深基坑支護施工全過程仿真系統(tǒng)的開發(fā)”(bgzyky201362) 水利部公益性行業(yè)科研專項“水利水電專業(yè)軟件平臺開發(fā)”(201201050)
【分類號】：U449.82

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