- 摘 要
-
（中聯(lián)西北工程設(shè)計研究院有限公司， 西安 710077）
［摘要］CFG樁作為復(fù)合地基的一種，因其顯著的優(yōu)越性，在高層建筑中被大量使用，若用于濕陷性黃土地區(qū)，應(yīng)先對濕陷性進(jìn)行處理。強夯法在處理濕陷性黃土?xí)r，具有施工速度快、造價低廉、處理效果好等優(yōu)點。以具體工程為例，對強夯+CFG樁復(fù)合地基在具有腐蝕性的濕陷性黃土地區(qū)的應(yīng)用做了介紹，對強夯法的適用性、強夯設(shè)計步驟、施工注意事項、濕陷處理效果、CFG樁復(fù)合地基的設(shè)計方法等方面進(jìn)行了詳細(xì)闡述。工程實踐表明，在具有腐蝕性的濕陷性黃土場地使用該方法進(jìn)行地基處理可行，承載力及沉降均可滿足規(guī)范要求，效果良好。
［關(guān)鍵詞］強夯； CFG樁； 腐蝕性； 濕陷性黃土； 地基處理
中圖分類號：TU472-99文獻(xiàn)標(biāo)識碼：A文章編號：1002-848X(2020)23-0114-04
Application of dynamic compaction and CFG pile composite foundation in corrosive collapsible loess regions
LIU Ting, LIU Dongshun, ZHANG Pingshun, LEI Jing, HE Chao
(China United Northwest Institute for Engineering Design and Research Co., Ltd., Xi′an 710077, China)
Abstract:As a kind of composite foundation, CFG piles are widely used in high-rise buildings due to their remarkable advantages. If it was used in collapsible loess regions, the collapsibility should be treated first. The dynamic compaction method has advantages of fast construction speed, low cost and good treatment effect when dealing with collapsible loess. Taking specific project as an example, the application of dynamic compaction and CFG piles composite foundation in corrosive collapsible loess regions was introduced. The applicability of dynamic compaction, dynamic compaction design steps, construction precautions, collapsibility treatment effects and the design method of CFG pile composite foundation were elaborated in detail. The engineering practice shows that it is feasible to use this method for foundation treatment in corrosive collapsible loess regions, and the bearing capacity and settlement can meet the requirements of the specification, and the effect shows well.
Keywords:dynamic compaction; CFG pile; corrosive; collapsible loess regions; foundation treatment
作者簡介：劉挺，碩士，高級工程師，一級注冊結(jié)構(gòu)工程師，Email:8962401@qq.com。
