建立考慮土拱效應(yīng)的抗滑樁間距計算公式的嘗試*
朱朝輝
- 摘 要
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朱朝輝(合肥工業(yè)大學(xué)土木與水利工程學(xué)院，合肥230009)[摘要] 樁間距的確定是抗滑樁設(shè)計中的一個重要內(nèi)容，其與樁間土體的土拱效應(yīng)有關(guān)。對常見的5種考慮土拱效應(yīng)的樁間凈距計算理論進行了對比分析，結(jié)果表明盡管它們已在單個工程算例中被驗證為合理的，但它們不具有廣泛的適用性與有效性。進而基于歸納法的思想，利用多個實際工程的設(shè)計參數(shù)，對建立起考慮土拱效應(yīng)影響的樁間距統(tǒng)一計算公式進行嘗試，最終發(fā)現(xiàn)無法建立起一種普適的樁間距計算公式。但借助模型試驗與現(xiàn)場試驗研究增進對土拱效應(yīng)作用機理的認(rèn)識，針對局部區(qū)域或單個滑坡建立起樁間距的經(jīng)驗計算公式是可能的。[關(guān)鍵詞] 抗滑樁；樁間距；土拱效應(yīng)中圖分類號：TU452 文獻(xiàn)標(biāo)識碼：A 文章編號：1002-848X(2012) S2-0507-03Study on the formula for spacing of anti-slide piles considering with soil arching effectZhu Zhaohui( School of civil Engineering Hefei university of Technology, Hefei 230009, China)Abstract: Pile spacing is an important index during the design of anti-slide piles, which affected by the soil arching effect between piles.5 kinds of formulas for calculating the spacing of anti-slide piles had been comparatively analyzed in this article. It is found that they all have not universal applicability and validity in all cases of engineering, although which have been approved by some cases. Based on the inductive method, a widespread applicable formula of pile spacing is try to established with the design parameters of real projects. It is shown that there is no distinct regularity among these data, which indicated that a widespread applicable formula of pile spacing is too difficult to found. But it is possible to establish some experiential method for calculating pile spacing of some local or single engineering, with the enhancive understanding of soil arclung mechanism by field experiment and model investigation.Keywords: anti-slide pile; pile spacing; soil arching effect
