設計參數對深開挖擋土支撐之敏感度評估

Sensitivity Study of Design Parameters for Retaining and Bracing Systems of Deep Excavation

張吉佐(Chi-Tso Chang) ； 陳坤泉(Kun-Chuan Chen)

《地工技術》 76期 (1999/12) Pp. 17-24

https://doi.org/10.30140/SG.199912.0001

摘要

地下室開挖擋土支撐分析設計參數之選擇及引用，對地下室開挖之安全性佔有極重要之地位。施工良窳雖關係著擋土支撐之安全性，除了必須藉助監測系統以瞭解整個開挖行為外；為避免因突發性無預警之危險情況發生，分析必須對參數之敏感度加以掌握以及對施工廠商之不當行為嚴加預防，以發揮掌握先機之能力。本文係利用台北一工地之地層試驗資料、施工狀況，並配合全程之監測結果，作為分析基準。針對地下室開挖擋土支撐分析所引用之設計參數逐一加以改變，以瞭解設計參數變化對擋土支撐之應力及應變敏感度，供施工之參考。

關鍵字

深開挖 ； 擋土支撐 ； 設計參數

並列摘要

Evaluation of parameters is of great importance in the retaining and bracing system analyses of deep excavation. The sensitivity of the design parameters should be carefully handled and the improper construction behavior should be avoided to have the situation in control beforehand, although the safety of the bracing system is directly related to the quality of construction management and must rely upon monitoring system to thoroughly comprehend the excavation behavior.This study is based on data from soil laboratory testing, construction arrangement and monitoring results in a site of Taipei basin. All the design parameters used in the analysis are examined one by one for the sensitivity study of the stress and strain in the retaining and bracing system.

並列關鍵字

deep excavation ； retaining wall and bracing system ； design parameters