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段志遠¹  ,  李德晟¹  ,   薛    澤¹  ,  陳俊昂² ,  梁慶華³

 

( 1 .  河海大學 土木與交通學院 ，江蘇 南京 210024 ;  2.  廣東省水利電力勘測設計研究院有限公司，

廣東 廣州 510000 ;  3 .  廣東省南沙區水務局 ，廣東 廣州 510000)

摘   要 ：采用水泥攪拌樁聯合排水預壓法對濱海地區軟土地基進行加固處理，通過 PLAXIS 3D 有限元軟件對該方法的加固效果進行數值模擬，模擬分析臨水或臨空條件下地基的沉降與水平位移，以及軟基深度 、土體擾動對地基穩定性的影響。結果表明：水泥攪拌樁聯合排水預壓法能夠有效降低施工期間及施工后的沉降量， 并顯著提升地基的抗變形能力和穩定性，特別是在潮汐作用下，該方法能有效控制不均勻沉降，減小路基一側的下沉和臨水一側的隆起，抵抗土體擾動；當軟基深度較大時，地基的沉降影響范圍顯著增加，但經過長時間的固結處理，沉降值顯著減小。研究結果可為濱海軟基處理提供了重要的理論依據和技術參考。

關鍵詞：水泥攪拌樁；排水預壓；有限元模擬；沉降；水平位移

中圖分類號：TU470           

文獻標志碼：A            

文章編號： 1005- 8249   (2024)  05- 0043- 07

 DOI:10. 19860/j.cnki.issn1005 - 8249.2024.05 .009

 

DUAN Zhiyuan¹,  LI Desheng¹,  XUE Ze¹  ,   CHEN Jun ’ang² ,  LIANG Qinghua³

（1 . College of Civil and Transportation,  Hohai University, Nanjing 210024, China;

2. Guangdong Hydropower Planning & Design Institute co. ，Ltd. ，Guangzhou 510000 ,  China;

3 . Nansha Water Affairs Bureau Guangdong Provincial ,  Guangzhou 510000,  China)

Abstract: In this paper, the cement mixing pile combined with drainage pre-compression method is used to reinforce the soft ground foundation in coastal area, and the numerical simulation of the reinforcement effect of this method is carried out by PLAXIS 3D finite element software, which simulates and analyses the settlement and horizontal displacement of the foundation under the conditions of waterfront or airside, as well as the influence of the depth of the soft foundation and the disturbance of the soil on the stability of the foundation. The study shows that: the cement mixing pile combined with drainage pre-compression method can effectively reduce the settlement during and after construction, and significantly improve the deformation resistance and stability of foundations, especially under tidal action, the method can effectively control the uneven settlement, reduce the subsidence of one side of the roadbed and the bulge of the waterfront side, and resist the soil disturbance: when the depth of the soft foundation is large, the settlement influence range of foundations increases significantly, but after a When the depth of soft foundation is larger, the settlement influence range of foundation increases significantly, but after a long time of consolidation treatment, the settlement value decreases significantly. The results of the study can provide important theoretical basis and technical reference for coastal soft foundation treatment.

Keywords :  cement mixing pile;  drainage pre loading;  finite element modeling;  settlement;  lateral displacement

*基金項目： 國家自然科學基金項目(52178327); 廣州市南沙區防洪潮安全系統提升關鍵技術研究項目（ 穗南水合2022-263) 。 

作者簡介：段志遠  (2002—) ,  男，本科，碩士研究生，研究方向：軟土固化處理。

通信作者： 陳俊昂  (1981 —) ,男，本科，教授級高級工程師，研究方向：水利工程技術研究 、規劃設計。 

收稿日期：2024- 02- 28