併構岩為包含著岩塊與基質二種材料所組成之岩石，其力學性質會受到異質性與異向性之影響。本研究利用不同配比之水泥與高嶺土製作橫向等向性併構岩試體，進以探討併構岩之力學行為。
岩塊含量是用來評估併構岩整體工程性質的重要參數，本研究使用旋轉式掃描器擷取併構岩試體之表面展開影像，利用影像處理法估算併構岩試體之岩塊體積比。並擷取破壞後試體之表面展開影像觀察其破壞模態，將破壞模態分為滑動破壞模態與非滑動破壞模態兩類，其中非滑動破壞又細分為張裂破壞模態、剪力破壞模態與延性壓縮破壞模態。
試驗結果顯示併構岩試體之破壞強度隨著圍壓增加而提高；強度異向性則隨著圍壓增加而降低。本研究並以Tien and Kuo(2001)破壞準則與FLAC有限差分軟體對併構岩試體之破壞強度、強度異向性與破壞模態進行理論模擬分析，結果顯示理論預測與試驗數據大致相符，可知此模式可求得異向性岩體之合理模擬效果。

Bimrock is a kind of rock which contains the composition of block and matrix, its mechanical properites can be influenced by heterogeneous and anisotropy. This research is in different proportion with cement and kaolin to make transversely isotropic specimen of bimrock, then evolute to probe on mechanical behavior.
The content of rock is an important parameter to estimate bimrock, this research use rotary scanner to pick specimen of bimrock and develope the image on the surface, use image process method to estimate the raito of specimen of bimrock.
The result shows that the increase of confining pressure cause he destructive force to raise,and heterogeneous strength to reduce. This research use Tien and Kuo(2001) failure criterion and FLAC program to analyze the strength、heterogeneous and failure mode.the result show that prediction and experimental data are fairly agreeable.

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