Abstract
The safety of foundation pit is related to the safety of surrounding buildings and roads, so it is necessary to closely observe the settlement around the excavation process. Based on the monitoring data during the excavation of the deep foundation pit project in a hospital in Guiyang, this paper studies the variation law of the excavation process of the deep foundation pit:If the excavation depth of the foundation pit is above 9 m, the key factor affecting the settlement is the surrounding shallow foundation, and the factor that has great influence on the settlement of the foundation pit below 9 m is the side length of the foundation pit;After the depth of the foundation pit reaches 15 m, the influence of the side length of the surrounding shallow foundation and the foundation pit on the settlement around the foundation pit will gradually disappear, and the settlement of the foundation pit will become stable at this time;Around the road settlement in the excavation depth of 12 m more obvious changes in the settlement area below 12 stable and less later changes;The change law of crown beam settlement and horizontal displacement of foundation pit tends to be consistent with the surrounding settlement.
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