樁承式路堤土拱效應(yīng)分析及土拱效應(yīng)比的提出
張八芳
- 摘 要
-
(廈門市工程檢測(cè)中心有限公司，廈門 361004)［摘要］根據(jù)路堤荷載作用下的樁土變形特性，分析了樁承式路堤土拱效應(yīng)的形成機(jī)理及形成條件?；谕凉靶?yīng)的研究現(xiàn)狀，提出了采用土拱效應(yīng)比來反映土拱效應(yīng)的發(fā)揮程度，通過現(xiàn)場(chǎng)試驗(yàn)的實(shí)測(cè)數(shù)據(jù)及數(shù)值分析對(duì)土拱效應(yīng)比和樁體荷載分擔(dān)比進(jìn)行了對(duì)比分析。結(jié)果表明，土拱效應(yīng)比能更合理全面地反映土拱效應(yīng)的發(fā)揮程度；面積置換率是控制土拱效應(yīng)發(fā)揮程度的關(guān)鍵因素，土拱效應(yīng)比隨著面積置換率的提高先增后減，存在一個(gè)最優(yōu)值。［關(guān)鍵詞］樁承式路堤; 土拱效應(yīng); 土拱效應(yīng)比; 樁體荷載分擔(dān)比; 面積置換率中圖分類號(hào)：TU433,TU411.3 文獻(xiàn)標(biāo)識(shí)碼：A 文章編號(hào)：1002-848X(2015)01-0094-04Soil arching effect analysis of pile-supported embankment and proposal of the soil arching effect ratioZhang Bafang(Xiamen Engineering Center Inspection Co., Ltd., Xiamen 361004, China)Abstract: According to the deformation characteristics of piles and soil under the embankment loadings, the formation mechanism of soil arching effect and its forming conditions of pile-supported embankment were analyzed. Based on the current study situation of soil arching effect, the soil arching effect ratio was suggested to reflect the utilization degree of soil arching effect. Based on the field measured results and the numerical simulation analyses, the soil arching effect ratio was compared analysis with pile efficacy. Results show that the soil arching effect ratio is more scientific and reasonable to reflect the utilization degree of soil arching effect; the area replacement ratio plays a key role in utilization degree of soil arching effect, and as the rise of the area replacement ratio, the soil arching effect ratio increases first and then decreases, which means that there exists a optimum valve of the soil arching effect ratio.Keywords: pile-supported embankment; soil arching effect; soil arching effect ratio; pile efficacy； area replacement ratio作者簡(jiǎn)介：張八芳，碩士，工程師，Email：zbafang@163.com。參考文獻(xiàn)［1］周小文，濮家騮. 隧洞結(jié)構(gòu)受力及變形特征的離心試驗(yàn)?zāi)Ｐ脱芯浚跩］. 清華大學(xué)學(xué)報(bào):自然科學(xué)版，2001，41(8)：110-112.［2］周健，亓賓，曾慶有. 被動(dòng)樁土拱效應(yīng)與影響因素細(xì)觀研究［J］. 建筑結(jié)構(gòu)，2009，39(9)：100-103，77.［3］TERZAGHI K. Theoretical soil mechanic［M］. New York: John Wiley & Sons.,Inc., 1943.［4］朱小軍，趙學(xué)亮，龔維明，等. 剛性樁復(fù)合地基墊層土拱效應(yīng)宏細(xì)觀機(jī)理研究［J］. 建筑結(jié)構(gòu)，2014，44(1)：82-87.［5］楊明輝，汪羅成，趙明華. 有限土體主動(dòng)土壓力計(jì)算的土拱效應(yīng)分析［J］. 建筑結(jié)構(gòu)，2013，43(2)：71-75.［6］楊雪強(qiáng)，何世秀，莊心善. 土木工程中的成拱效應(yīng)［J］. 湖北工學(xué)院學(xué)報(bào)，1994,9(1)：1-7.［7］朱朝輝. 建立考慮土拱效應(yīng)的抗滑樁間距計(jì)算公式的嘗試［J］. 建筑結(jié)構(gòu)，2012，42(S2)：507-509.［8］席培勝，劉松玉. 水泥土深層攪拌法加固軟弱地基新技術(shù)研究［J］. 施工技術(shù)，2006,31(1)：2-5.［9］HEWLETT W J, RANDOLPH M F. Analysis of piled embankments ［J］. Ground Engineering, 1988, 21(3): 12-18.［10］LOW B K, TANG S K, CHOA V. Arching in piled embankment［J］. Journal of Geotechnical Engineering, 1983, 120(11): 1917-1938.［11］陳云敏，賈寧，陳仁朋. 樁承式路堤土拱效應(yīng)分析［J］. 中國(guó)公路學(xué)報(bào)，2004，10(4)：1-6.
- 下載地址
-
你還沒注冊(cè)？或者沒有登錄？這篇論文要求至少是本站的注冊(cè)會(huì)員才能閱讀！
如果你還沒注冊(cè)，請(qǐng)趕緊點(diǎn)此注冊(cè)吧！
如果你已經(jīng)注冊(cè)但還沒登錄，請(qǐng)趕緊點(diǎn)此登錄吧！
