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工程实际中时有塔式起重机混凝土基础不回填就使用或者基坑内产生积水的现象,最终导致塔式起重机与混凝土基础整体倾翻的事故。本文以QTZ40型塔式起重机为例,介绍混凝土基础不回填时的稳定性校核方法,给出正常回填的基础受力分析与计算示意图。1混凝土基础力学模型与受力分析1.1混凝土基础所受外力当固定式塔式起重机混凝土基础不回填,基础四周无回填土而裸露或有回填土,但未夯实,混凝土基
In practice, there is a phenomenon that the tower crane concrete foundation is not used for backfilling or water is generated inside the foundation pit, which eventually leads to the entire tipping over of the tower crane and the concrete foundation. Taking QTZ40 tower crane as an example, this paper introduces the method of checking the stability of concrete foundation without backfilling, and gives the basic stress analysis and calculation of normal backfill. 1 Foundation mechanics and stress analysis of concrete 1.1 The external force on the concrete foundation When the fixed tower crane concrete foundation is not backfilled, there is no backfill around the foundation, bare or backfilled, but not tamping, concrete foundation