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（1 山東建筑大學(xué)土木工程學(xué)院， 濟(jì)南 250101； 2 建筑結(jié)構(gòu)加固改造與地下空間工程教育部重點(diǎn)實(shí)驗(yàn)室， 濟(jì)南 250101； 3 山東建筑大學(xué)工程鑒定加固研究院， 濟(jì)南 250013)

［摘要］橋臺(tái)邊坡堆載過(guò)高容易導(dǎo)致相鄰橋墩偏壓超載，造成橋墩下部的樁基傾斜偏移，引起墩頂蓋梁偏位，從而導(dǎo)致架梁困難。針對(duì)山東某高速橋梁工程樁基偏移，采用理論分析和數(shù)值模擬方法揭示了高邊坡堆載作用下樁基的偏移機(jī)理； 針對(duì)可能出現(xiàn)的偏移病害，采用開(kāi)挖檢測(cè)和低應(yīng)變檢測(cè)法檢測(cè)樁基完整性和穩(wěn)定性。根據(jù)樁基傾斜偏位現(xiàn)狀和發(fā)展趨勢(shì)，在全面總結(jié)現(xiàn)有糾偏技術(shù)的基礎(chǔ)上，提出了樁側(cè)鉆糾偏孔卸壓、樁側(cè)頂推扶正、樁周開(kāi)挖空間內(nèi)回填混凝土加固的綜合糾偏處理技術(shù)，同時(shí)進(jìn)行地基注漿加固。經(jīng)過(guò)1年多不連續(xù)監(jiān)測(cè)，糾偏后樁基未再發(fā)生偏移，糾偏效果良好，可為對(duì)其他類似工程提供了良好借鑒。

［關(guān)鍵詞］橋臺(tái)堆載；  樁基；  樁身偏移；  糾偏技術(shù)

中圖分類號(hào)：TU473文獻(xiàn)標(biāo)識(shí)碼：A文章編號(hào)：1002-848X(2020)06-0061-07

Analysis of deviation mechanism and deviation-rectification technology for pile foundation of bridge due to abutment loading

Sun Jianping1, Tang Chao1,Wang Jun1,2 , Liu Yanlei1,2, Qiu Jingge3, Jiang Zongbao3

(1 School of Civil Engineering, Shandong Jianzhu University, Jinan 250101, China; 2 Key Laboratory of Building Structural Reinforcement and Reconstruction and Underground Space Engineering of Ministry of Education, Jinan 250101, China;  Engineering Research Institute of Appraisal and Strengthening, Shandong Jianzhu University, Jinan 250013, China)

Abstract:Overloading of abutment side slope is easy to lead to overload of adjacent piers, which causes the pile foundation at the lower part of the pier to tilt and offset the cover beam at the top of the pier, leading to the difficulty of girder erection. In view of the pile foundation deviation of a bridge project in Shandong, the theory analysis and numerical simulation methods were used to reveal the pile foundation deviation mechanism under the high slope heaped-up load; aiming at the possible pile foundation migration disease the integrity and stability of the pile foundation were tested by excavation test and low strain test. According to the present situation and development trend of pile foundation inclination and deviation, the comprehensive summary of the existing deviation rectification technology was conducted to put forward a comprehensive rectifying treatment technology of pile side drilling rectifying hole relieving pressure, pile side pushing and righting, backfilling concrete in the space around the pile, and grouting reinforcement of the foundation. After more than one year discontinuous monitoring, the pile foundation has not deviated again, and the effect of rectifying deviation is good, providing a good reference for other similar projects.

Keywords:abutment loading; pile foundation; pile deviation; rectification technology

作者簡(jiǎn)介：孫劍平，碩士，教授，碩士生導(dǎo)師，Email: 15069192907@163.com。