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(1 北京大學醫(yī)學部基建工程處, 北京 100191; 2 建筑安全與環(huán)境國家重點實驗室, 北京 100013;3 中國建筑科學研究院有限公司地基基礎(chǔ)研究所, 北京 100013; 4 北京市地基基礎(chǔ)與地下空間開發(fā)利用工程技術(shù)研究中心, 北京 100013; 5 中國建筑技術(shù)集團有限公司, 北京 100013)
摘要: 針對某具體工程實例,通過磁測檢測、取芯檢測、開挖檢測、靜載試驗試樁檢測,分析了抗拔樁抗拔承載力不足的原因及承壓水對抗拔樁帶來的危害,指出承壓水及抗拔樁施工工藝引起的樁側(cè)摩阻力的降低是導致抗拔樁抗拔承載力不足的原因. 提出了具有承壓水水文地質(zhì)條件下抗拔樁施工工藝與質(zhì)量控制措施即試樁、降止水、提高泥漿質(zhì)量、采用后壓漿工藝及增加上覆土,以期對類似工程地質(zhì)及水文地質(zhì)條件下抗拔樁的施工提供參考.
關(guān)鍵詞: 承壓水; 抗拔樁; 后壓漿; 泥漿; 上覆土
中圖分類號:TU318. 1 文獻標志碼:A 文章編號:1002-848X(2023)09-0137-04
DOI:10. 19701 / j. jzjg. 20222664
Influence of confined water on uplift pile construction and countermeasures
HAN Li1, XIA Changhua2,3,4, LI Dezhi5, DING Baohua5, JIANG Ning2,3,4
(1 Infrastructure Construction Department of Peking University Health Science Center, Beijing 100191, China;2 State Key Laboratory of Building Safety and Built Environment, Beijing 100013, China; 3 China Academy ofBuilding Research Foundation Institute, Beijing 100013, China; 4 Beijing Engineering Technology ResearchCenter of Foundation and City Underground Space Development and Utilization, Beijing 100013, China;5 China Building Technique Group Co. , Ltd. , Beijing 100013, China)
Abstract:In view of a specific engineering example, the reasons for the insufficient uplift bearing capacity of uplift pilesand the harm caused by confined water to uplift piles were analyzed through magnetic testing, core testing , excavationtesting, and static load test pile testing . It is pointed out that the reduction of pile side friction resistance caused byconfined water and the construction technology of uplift piles is the reason for the insufficient uplift bearing capacity of upliftpiles. The construction technology and quality control measures of uplift piles under hydrogeological conditions of confinedwater were put forward, namely test pile, dewatering and water sealing, improving mud quality, adopting post groutingtechnology and increasing overlying soil in order to provide reference for the construction of uplift piles under similarengineering geology and hydrogeological conditions.
Keywords:confined water; uplift pile; post grouting; slurry; overlying soil
第一作者:韓麗,碩士,工程師,主要從事工程管理工作,Email: hanli@ bjmu. edu. cn.
[引用本文] 韓麗,夏長華,李德志,等. 承壓水對抗拔樁施工的影響及對策[ J]. 建筑結(jié)構(gòu),2023,53(9):137-140.HAN Li,XIA Changhua,LI Dezhi,et al. Influence of confined water on uplift pile construction and countermeasures[ J].Building Structure,2023,53(9):137-140.
