軟弱岩石之現地傍壓、透水及波速量測試驗

Field Pressuremeter, Lugeon and Wave Velocity Measurements in Soft Rocks

黃安斌(An-Bin Huang) ； 廖志中(Jyh-Jon Liao) ； 潘以文(Yii-Wen Pan)

《地工技術》 83期 (2001/02) Pp. 69-76

https://doi.org/10.30140/SG.200102.0005

摘要

台灣中北部麓山帶地區出露之地層多屬極軟弱年輕之砂岩，普遍具有固結差，膠結不良之特性。岩層取樣過程對岩樣本身之組織構造可能已造成破壞。因此現地試驗是量測軟弱岩石力學性質比較理想的方法。作者研發完成適用於軟弱岩石之高壓傍壓儀，其最高承受之壓力為25MPa，傍壓儀之徑向變形量以12個貼有應變片之量測臂來進行。現地透水試驗常用之Lugeon試驗設備也經過修改以加強其試驗之品質。作者在新竹縣寶山鄉建立了一個試驗站，並在此地軟弱砂岩中完成了一系列之現地試驗包括高壓傍壓儀、Lugeon、以及P-S Logging試驗。本論文敘述這些試驗設備、使用程序、結果之解釋、以及討論使用這些試驗方法對量測軟弱岩石工程性質之影響。

關鍵字

軟弱岩石 ； 現地試驗

並列摘要

The outcrops in the central and northern regions of Western Taiwan often contain poorly cemented, very weak and young rock formations. The rock sampling process is likely to damage the structure that originally existed in the rock mass. For this reason, in situ testing is a desirable alternative in characterizing the properties for soft rocks. The authors have developed a high stress pressuremeter specifically for testing in soft rocks. The new pressuremeter can sustain a maximum expansion pressure of 25 Mpa, and instrumented with 12 strain-gauged strain arms. The Lugeon test equipment typically used to conduct field permeability tests has been modified to enhance the quality of test results. The authors established a test site in Bao Shan Township of Hsin Chu County, where a series of high stress pressuremeter tests, Lugeon tests, and P-S logging tests were conducted. This paper describes details of these test equipment, procedure, interpretation of the data and their implications in the characterization of soft rocks.

並列關鍵字

Soft rocks ； In situ testing