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PREDICTION AND ANALYSIS OF DEFORMATION OF DEEP EXCAVATION
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摘要: 由于基坑工程的复杂性，很难从理论上对围护结构水平位移和周围地表沉降进行预测，故在基坑开挖过程中信息化施工就显得特别重要。采用改进的BP算法对深基坑围护结构变形进行预测的方法，与传统的BP算法相比，该算法具有更快的收敛速度，能有效地改善传统BP算法收敛慢的缺点。通过对预测结果与实测结果进行对比分析，表明改进的BP网络是预测基坑围护结构变形的一种十分有效的方法。最后分析了基坑周围地表沉降与围护结构变形之间的关系。Abstract: Because of the complexity of excavation engineering, it is very difficult to predict the displacement of retaining structure and the settlement of ground surface, and information construction is very important for an excavation engineering.A method for predicting displacement of retaining structure based on modified BP algorithm is used. The modified algorithm has higher convergence rate and thus improves the conventional one effectively. It is proved that prediction results agree with the measured ones very well, so displacement prediction by the modified BP algorithm is practicable. Finally, the relation between the displacement of retaining structure and the settlement of ground surface is analyzed.
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Key words:
- modified BP algorithm /
- deep excavation /
- deformation prediction /
- retaining structure
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