以二次注入灌漿控制潛盾施工引致之沈陷

Reduce the Ground Settlement by Using the Secondary Grout Injection in Shield Tunnelling

賴慶和(Ching-Ho Lai) ； 余明山(Ming-Shan Yu) ； 吳建閩(Chien-Min Wu) ； 吳偉康(Wei-Kan Wu)

《地工技術》 60期 (1997/04) Pp. 83-96

https://doi.org/10.30140/SG.199704.0006

摘要

潛盾隧道施工時，因背填灌漿不易確實執行而造成地表過量沈陷之工程問題時有所聞，因此在土壤漏失所引致之沈陷效應尚未傳導至地表，即掌握時機自隧道內對地層施以二次注入灌漿填充土層中空隙之施工案例日益增加。本文將探討隧道四周土壤漏失、背填灌漿與地表沈陷的關係，以說明二次注入灌漿減少地表沈陷之機制及施工方式，進而藉由案例探討以了解實際工程施工之灌漿時機、範圍、管理、材料及成效，供未來類似工程施工之參考。

關鍵字

潛盾隧道 ； 土壤漏失 ； 二次注入灌漿 ； 沉陷

並列摘要

Significant ground settlement has been observed from time to time during shield tunneling when backfill grout injection is not carried out accurately. It becomes more popular to use secondary grout injection at the proper time before the influence of ground loss to the surrounding medium extended to ground surface and to prevent/or reduce the ground settlementThis paper will begin with explaining the relation between ground loss, backfill grout injection, and ground settlement. It also discribes the mechanism and application of secondary grout injection in reducing ground settlement. Case study focusing on the timing, area, construction management, material and effects of the secondary grout injection will also be given. It is expected that this paper can provide some valuable data for similar case in the future.

並列關鍵字

Shield tunnel ； ground loss ； secondary grout injection ； settlement