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(1 中冶建筑研究總院有限公司, 北京 100088; 2 中國京冶工程技術(shù)有限公司北京市巖土錨固工程中心, 北京 100088)
摘要: 以剛性樁作為豎向增強體所形成的復(fù)合地基,因其加固效果顯著備受工程界青睞,已在高層建筑、市政、高鐵等土木工程領(lǐng)域地基處理中得到廣泛應(yīng)用。 根據(jù)現(xiàn)有設(shè)計計算理論在工程設(shè)計中的實踐與應(yīng)用,對剛性樁復(fù)合地基應(yīng)用于工程實踐中的承載力提高倍數(shù) ζ 的控制、樁土應(yīng)力比 n 限值等九個熱點問題進行分析與探討。 經(jīng)過設(shè)計實踐和理論推導(dǎo)相互佐證,得出了復(fù)合地基承載力提高倍數(shù) ζ 應(yīng)控制在 2. 5 ~ 3. 0 之間、樁土應(yīng)力比 n 限值可控制在 45~ 60 之間的初步結(jié)論,可供工程技術(shù)人員參考。
關(guān)鍵詞: 剛性樁; 豎向增強體; 剛性樁復(fù)合地基; 承載力提高倍數(shù); 樁土應(yīng)力比
中圖分類號:TU472 文獻標(biāo)志碼:A 文章編號:1002-848X(2022)24-0106-08
DOI:10. 19701 / j. jzjg. 20210472
Discussion on hot issues in the application of rigid pile composite foundation
DANG Yujing1,2
(1 Central Research Institute of Building and Construction MCC, Beijing 100088, China; 2 Beijing GeotechnicalAnchorage Engineering Center, China Jingye Engineering Co. , Ltd. , Beijing 100088, China)
Abstract:The composite foundation formed by rigid piles as vertical reinforcement is favored by the engineering fieldbecause of its remarkable reinforcement effect, and has been widely used in the ground treatment of high-rise buildings,municipal administration, high-speed railway and other civil engineering fields. According to the practice and application ofexisting design calculation theory in engineering design, nine hot issues such as the control of the bearing capacity increasemultiple ζ and the pile-soil stress ratio n limit value of the rigid pile composite foundation applied in the engineeringpractice were analyzed and discussed. Through the mutual support of design practice and theoretical deduction, thepreliminary conclusions are drawn that bearing capacity increase multiple ζ of composite foundation should be controlledwithin 2. 5 ~ 3. 0, and the pile-soil stress ratio n limit value should be controlled within 45 ~ 60,which can be used as areference for engineers and technicians.
Keywords:rigid pile; vertical reinforcement; rigid pile composite foundation; bearing capacity increase multiple; pile-soilstress ratio
第一作者:黨昱敬,學(xué)士,教授級高級工程師,注冊土木工程師(巖土),主要從事巖土、地基與基礎(chǔ)和城市地下工程方面的科研和設(shè)計工作,Email:dyj765@ sina. com。
[引用本文] 黨昱敬. 剛性樁復(fù)合地基應(yīng)用熱點問題探討[ J]. 建筑結(jié)構(gòu),2022,52(24):106-113. DANG Yujing.Discussion on hot issues in the application of rigid pile composite foundation [ J]. Building Structure,2022,52 ( 24):106-113.
