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基于樁頂位移協(xié)調(diào)的地下室底板抗浮設(shè)計(jì)
何日雄
摘 要

 

 (廣州市科城建筑設(shè)計(jì)有限公司, 廣州 510663)

摘要]預(yù)應(yīng)力混凝土管樁具有較高的抗壓和抗拔承載力,且施工速度快、經(jīng)濟(jì)性好,在沿海地區(qū)被廣泛采用。對于承受較大水頭壓力的地下室底板結(jié)構(gòu)而言,抗浮方案往往是控制底板結(jié)構(gòu)工程造價(jià)的關(guān)鍵因素。通過優(yōu)化布樁方案,采用剪切位移法計(jì)算抗拔樁變形,結(jié)合工程實(shí)踐經(jīng)驗(yàn)對相關(guān)參數(shù)進(jìn)行修正,最終求得抗拔樁的豎向剛度理論值,并按照樁頂與地下室底板結(jié)構(gòu)變形協(xié)調(diào)的模式,采用有限元法對地下室底板進(jìn)行內(nèi)力分析和設(shè)計(jì)。

關(guān)鍵詞]抗拔樁剛度; 位移協(xié)調(diào); 剪切位移法; 泊松比; 抗浮設(shè)計(jì)

中圖分類號:TU354,TU318.2      文獻(xiàn)標(biāo)識(shí)碼:A      文章編號:1002-848X(2014)08-0040-04

Anti-floating design of the basement slab structure based on the pile-top displacement consistent

He Rixiong

 (Guangzhou Keycity Architectural Design Co., Ltd., Guangzhou 510663, China)

Abstract: Due to the characteristics of high uplift resistance capacity and compressive strength, fast construction speed, well economic efficiency, prestressed concrete pipe piles are widely used in coastal areas. For the basement slab structure under high water pressure, anti-floating scheme are usually the key factor to control its cost. Through the optimization of the pile arrangement scheme, shear-displacement method was used to calculate the uplift pile deformation. Combined with the engineering practice, the relevant parameters were amended. Finally, the theoretical vertical stiffness of uplift piles were obtained and finite element method was used to analyze the internal force and design the basement slab structure according to the pile-top and basement slab structure displacement consistent model.

Keywords: uplift pile stiffness; displacement consistent; shear-displacement method; Poisson’s ratio; anti-floating design

作者簡介:何日雄,學(xué)士,一級注冊結(jié)構(gòu)工程師,Email:81089472@qq.com

參考文獻(xiàn)

1COOKE R W, PRINCE G. Strains and displacements around friction pilesC//Proceedings of the Eighth International Conference on Soil Mechanics and Foundation Engineering. Moscow, U.S.S.R,1973.

2RANDOLPH M F, WROTH C P. Analysis of deformation of vertically loaded pilesJ. Journal of Geotechnical Engineering, ASCE, 1978,104(12):1465-1489.

3JGJ 942008 建筑樁基技術(shù)規(guī)范[S. 北京:中國建筑工業(yè)出版社,2008.

4JCCAD用戶手冊及技術(shù)條件[M. 北京:中國建筑科學(xué)研究院PKPM CAD工程部, 2011. 

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