泥岩之回脹崩解特性與坡面防護方法

Mudstone's Swelling Slaking Character and the Surface Protection for Mudstone Slope

蔡錦松(Jiin-Song Tsai) ； 張家齊(Jia-Chyi Chang)

《地工技術》 48期 (1994/12) Pp. 95-105

https://doi.org/10.30140/SG.199412.0008

摘要

泥岩遇水回脹崩解之特性對山坡地維護有極大影響。本文討論泥岩不同乾燥狀態所呈現出浸水回脹與崩解之變化。內容包含探討泥岩吸水回脹的機制，不同含水量之泥岩回脹與崩解試驗，乃至於酸鹼溶液對泥岩之影響。試驗結果指出，不同含水量立泥岩最大之回脹壓力約在20－35t/m^2，最大之自由回脹率則在6－10%左右。而平均崩解速率則由第一小時10kg/m^2/hr隨時間逐漸降低至第六小時5kg/m^2/hr。結論認為泥岩護坡應參考排水、防水與止水三項原則。至於泥岩坡面防護方式，則建議以不同黏滯度之油品與瀝青材料分層塗敷會有較佳之防護效果。

關鍵字

泥岩 ； 回脹崩解 ； 護坡

並列摘要

Swelling slaking phenomenon ca used by surface hydration is always an inherent problem for the protection of mudstone slope. In this paper, study on swelling and slaking potentials of mudstone is the major concern. Efforts also extend to realize the mechanisms of both water absorption and clay particles' detaching of intact mudstone. Laboratory experiments include swelling and slaking tests for intact mudstone merged in water and solution with different pH values. Test results include: (1) the swelling percentage of intact mudstone is about 6 -10%, (2) the swelling pressure is about 20 - 35t / m^2 and (3) the slaking speed is about 10 kg / m^2 / hr for the first hour immersing in water. This study concludes that drainage, sealing and water proofing are three main ways for mudstone slope protection. In practice, a covering of layers of oiI and asphalt is probably an efficient solution for the surface protection of mudstone slope.

並列關鍵字

mudstone ； swelling slaking ； slope protection