本文選題：隧洞入口　切入點(diǎn)：非凸塊體　出處：《地下空間與工程學(xué)報(bào)》2017年03期 　論文類型：期刊論文

【摘要】：隧洞入口處往往是地下巖體工程事故的多發(fā)區(qū),也可能存在同時(shí)跨隧洞頂板、側(cè)壁和入口邊坡面的非凸關(guān)鍵塊體,經(jīng)典塊體理論中的凸塊體有限性判定定理不適用于非凸塊體。在經(jīng)典塊體理論的基礎(chǔ)上,筆者針對臨空面之間含有凹狀組合時(shí)需要進(jìn)行并集運(yùn)算的特征,提出了可以同時(shí)表示凸塊體和非凸塊體的一般符號表示方法,然后根據(jù)一般塊體的構(gòu)造定理,推出了用所有子塊體是否有限來判斷非凸塊體有限與否的識別準(zhǔn)則,進(jìn)而枚舉分析出系統(tǒng)中的所有有限凸塊體,并按照結(jié)構(gòu)面編碼相同的原則組合出所有可能的有限非凸塊體,同時(shí)沿著凹狀相交的臨空面逐次切割非凸塊體,可以得到僅在切割面處相連接的非凸塊體的子塊體最優(yōu)組合,從而可以實(shí)現(xiàn)隧洞入口處非凸關(guān)鍵塊體的識別。這個方法的理論意義在于從凸塊體到非凸塊體擴(kuò)展了塊體理論的應(yīng)用范圍,在實(shí)際工程中又具有一定的實(shí)用價(jià)值。
[Abstract]:The entrance of the tunnel is often the frequently occurring area of underground rock engineering accidents, and there may also be non-convex key blocks that span the roof, side wall and entrance slope of the tunnel at the same time. The finiteness theorem of convex block in classical block theory is not suitable for non-convex block. On the basis of classical block theory, the author aims at the characteristic of union operation when there is concave combination between empty surfaces. A general symbolic representation method which can represent both convex and non-convex blocks is proposed. Then, according to the construction theorem of general blocks, the recognition criteria of whether all subblocks are finite to judge the finite or not of non-convex blocks are derived. Then all finite convex blocks in the system are enumerated and analyzed, and all possible finite non-convex blocks are combined according to the same principle of structural surface coding. At the same time, the non-convex blocks are cut one by one along the concave interface. The optimal combination of sub-blocks of non-convex blocks connected only at the cutting surface can be obtained. The theoretical significance of this method is that the application range of block theory is extended from convex block to non-convex block, and it has certain practical value in practical engineering.
【作者單位】： 華北水利水電大學(xué)資源與環(huán)境學(xué)院;
【基金】：華北水利水電大學(xué)高層次人才科研啟動項(xiàng)目(40274) 國家自然科學(xué)基金(41402269,51409102)
【分類號】：U451.2

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