微型钢管桩在重力式挡墙中的应用及验算

Application and Checking of Micro Steel-tube Piles in Gravity Retaining Wall

重力式挡墙因其防护强度高、施工便捷、造价经济等特点被广泛应用于建筑填方或挖方边坡支挡工程中,但当天然地基土抗剪强度较低时,需增大挡墙尺寸并进行地基加固处治,以致其在造价经济性方面的优势不复存在。文章以南宁市青环路K9＋140K9＋690段左侧路基滑坡工程为例,介绍了将微型钢管桩应用于重力式挡墙的设计方案,并通过验算分析,得出该设计方案在确保支挡工程安全可靠的同时,减小了挡墙尺寸,节约了工程造价。

Due to its high protection strength, convenient construction, economical cost and other charac- teristics,the gravity retaining wall is widely used in the retaining engineedng of construction filling or ex- cavation slope,however,when the natural foundation soil has lower shear strength, it is required to in- crease the retaining wall size together with foundation reinforcement treatment, thus its advantages in terms of economic cost does no longer e）dst.Taking the roadbed landslide engineedng at the left side of Nanning Qinghuan Road K9＋ 140-K9＋ 690 section as the example, this article introduced the design program of applying the micro steel-tube piles in the gravity retaining wall,and through the checking a- nalysis, it obtained that this design program can ensure the safe and reliable support engineedng, while reducing the size of retaining wall and saving the project cost.