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（1 江蘇科技大學(xué)土木工程與建筑學(xué)院, 鎮(zhèn)江 212003； 2 湖南科技大學(xué)巖土工程穩(wěn)定控制與健康監(jiān)測(cè)湖南省重點(diǎn)實(shí)驗(yàn)室， 湘潭 411201；3 廣西大學(xué)土木建筑工程學(xué)院， 南寧 530004； 4 南京工業(yè)大學(xué)交通運(yùn)輸工程學(xué)院， 南京 211816）

［摘要］透水管樁通過(guò)在樁身預(yù)留透水孔，聯(lián)通土體,釋放超靜孔隙水壓力，可加速沉樁過(guò)程樁周土的固結(jié)，有效減小沉樁擠土效應(yīng)；但是，預(yù)留孔不可避免地會(huì)破壞樁身結(jié)構(gòu)的完整性，為了探討開(kāi)孔對(duì)透水管樁抗彎抗裂性能的影響，開(kāi)展了普通管樁與透水管樁的抗彎試驗(yàn)，記錄了各樁的開(kāi)裂彎矩、破壞彎矩以及不同彎矩作用下的樁身?yè)隙扰c裂縫寬度，探討了開(kāi)孔對(duì)透水管樁抗彎抗裂性能的影響。研究表明，相對(duì)普通管樁，透水管樁跨中撓度更大，開(kāi)裂彎矩降低，但仍滿(mǎn)足規(guī)范要求；在相同彎矩作用下，透水管樁裂縫寬度小于普通管樁；在以相同裂縫寬度（1-5mm）作為極限狀態(tài)判斷標(biāo)準(zhǔn)的條件下，透水管樁的破壞彎矩大于普通管樁，透水管樁擁有優(yōu)于普通管樁的抗彎性能。

［關(guān)鍵詞］透水管樁； 抗彎性能； 撓度； 樁身裂縫

中圖分類(lèi)號(hào)：TU398-7文獻(xiàn)標(biāo)識(shí)碼：A文章編號(hào)：1002-848X(2020)07-0130-06

Experimental study on flexural properties of permeable pipe pile

SHEN Lin1， ZENG Chaofeng2，3， MEI Guoxiong3， CAO Yalei 4

（1 School of Civil Engineering and Architecture,Jiangsu University of Science and Technology, Zhenjiang 212003, China; 2 Hunan Provincial Key Laboratory of Geotechnical Engineering for Stability Control and Health Monitoring, Hunan University of Science and Technology, Xiangtan 411201, China; 3 School of Civil Engineering and Architecture, Guangxi University, Nanning 530004, China; 4 School of  Transportation Engineering, Nanjing Tech University，   Nanjing 211816, China)

Abstract:Permeable pipe piles have water holes in the pile body to communicate with the soil and release the super-static pore water pressure, which can accelerate the consolidation of the soil around the pile and effectively reduce the squeezing effect of the pile. However, the reserved holes will damage the integrity of the pile shaft structure. In order to explore the effect of holes on the flexural and crack properties of permeable pipe piles, the flexural tests of ordinary pipe piles and permeable pipe piles were carried out, and the cracking flexural moments of each pile were recorded. The damage flexural moment and the deflection of the pile body and the crack width under the action of different flexural moments, the effects of openings on the flexural and crack properties of pervious pipe piles were discussed. The research shows that, compared with ordinary pipe piles, the permeable pipe piles have greater deflection in the mid-span and the cracking moment is reduced, but still meets the requirements of the code; under the same flexural moment, the crack width of the permeable pipe piles is smaller than that of ordinary pipe piles; under the condition that the same crack width (1-5mm) is used as the criterion for determining the limit state, the flexural moment of the permeable pipe pile is greater than that of the ordinary pipe pile, and the permeable pipe pile has a better flexural property than the ordinary pipe pile.

Keywords:permeable pipe pile; flexural property; deflection; crack in pile shaft

*國(guó)家自然科學(xué)基金項(xiàng)目（51578164，51708206），濱海土木工程結(jié)構(gòu)與安全教育部重點(diǎn)實(shí)驗(yàn)室開(kāi)放課題（2017-KF03），廣西自然科學(xué)基金創(chuàng)新研究團(tuán)隊(duì)項(xiàng)目（2016GXNSFGA380008）。

作者簡(jiǎn)介：沈琳，碩士，Email：Sherly0@126.com。