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梁 晟1 ,  王曉磊2, 曹妮娜2,  張建英3, 于庭富3

( 1 .  新疆理工學院 機電工程學院 ，新疆 阿克蘇 843100 ;  

2.  河北工程大學 土木工程學院， 河北 邯鄲 056038 ;  

3 .  中國二十二冶集團有限公司路橋工程分公司 ，河北 唐山 064000)

摘   要 ：河北省邯鄲市地處華北平原 ，地下水資源較為豐富 ，在城市建設中基坑支護設計既要保證工程的 安全性還要兼顧一定的經濟性。以邯鄲市趙王大街地下綜合管廊深基坑工程為背景 ，利用 Midas - GTS 軟件對基坑降水開挖進行了全過程的數值模擬 ，在驗證模型的準確性后 ，分別分析支護樁的插入比 、內支撐預應力和止 水帷幕對基坑變形的影響。結果表明：支護樁的嵌固深度減小會導致樁前 、后土壓力差值增大 ，造成基坑失穩 破壞 ；內支撐的預應力值在 200 kN 時 ，可以有效控制基坑變形 ；止水帷幕的增設可以延長滲流路徑 ，減緩滲流 速度 ，對抑制基坑變形有積極作用。

關鍵詞：基坑開挖 ；數值模擬 ；基坑變形 ；富水地層

中圖分類號：TU924    

文獻標志碼：A  

文章編號： 1005- 8249   (2024)  03- 0068- 05 

DOI：10. 19860/j.cnki.issn1005 - 8249.2024.03 .014

 LIANG Sheng1 , WANG Xiaolei2, CAO Nina2, ZHANG Jianying3 , YU Tingfu3

1 . School of Mechanical and Electrical Engineering , Xinjiang Institute of Technology , Aksu 843100 , China;

2. College of Civil Engineering , Hebei University of Engineering , Handan 056038 , China;

3 . Road and Bridge Engineering Branch of China 22 Metallurgy Group Co. ，Ltd. ，Tangshan 064000 , China

Abstract : Handan City , Hebei Province is located in the North China Plain. The groundwater resources in this area are abundant. In urban construction , the design of foundation pit support should not only ensure the safety of the project , but also take into account the economy. Based on the deep foundation pit engineering of underground comprehensive pipe gallery in Zhaowang Street of Handan City , Midas - GTS software is used to simulate the whole process of foundation pit dewatering and excavation. After verifying the accuracy of the model , the influence of the insertion ratio of supporting pile , the prestress of internal support and the waterproof curtain on the deformation of foundation pit is analyzed respectively. The results show that the decrease of the embedded depth of the supporting pile will lead to the increase of the difference between the soil pressure before and after the pile , resulting in the instability and failure of the foundation pit. When the prestress value of the inner support is 200 kN , the deformation of the foundation pit can be effectively limited. The addition of waterproof curtain can prolong the seepage path , slow down the seepage velocity , and play a positive role in inhibiting the deformation of foundation pit. The relevant results can provide experience and reference for the optimization of similar water - rich strata support.

Keywords : foundation pit excavation; numerical simulation; foundation pit deformation; water - rich strat

 

 

*基金項目：河北省建設科技項目  (2022 - 2013) 。

作者簡介：梁   晟  (1997—) ,   男 ，碩士 ，研究方向：巖土工程。 

收稿日期：2023- 02- 12