發(fā)布時(shí)間：2018-01-15 05:04

  本文關(guān)鍵詞：層狀反傾-順傾邊坡傾倒變形形成條件及發(fā)育規(guī)模特征　出處：《巖土力學(xué)》2016年S2期 　論文類型：期刊論文

  更多相關(guān)文章： 陡傾層狀邊坡 傾倒變形 形成條件 發(fā)育分布特征

【摘要】：以往研究中傾倒變形研究在反傾邊坡較多而在順傾邊坡中很少,對(duì)兩種不同結(jié)構(gòu)的邊坡形成傾倒體的異同點(diǎn)更是存在較多空白。在總結(jié)大量?jī)A倒體實(shí)例基礎(chǔ)上,對(duì)層狀反傾和順傾邊坡傾倒變形形成條件及發(fā)育規(guī)模特征進(jìn)行了詳細(xì)研究。結(jié)果表明,順傾邊坡若發(fā)生傾倒,通常表現(xiàn)為坡高H100m,邊坡坡角β35°,巖層傾角α60°,巖性為薄層或薄層與中層互層的軟巖、軟硬相間的巖石;反傾邊坡當(dāng)坡角β30°及巖層傾角α30°就可能發(fā)生傾倒,其巖性為薄層~中厚層狀的軟巖、硬巖及具有似層狀結(jié)構(gòu)的堅(jiān)硬巖石均可;提出層狀巖質(zhì)邊坡"傾倒臨界傾角δ"的概念,對(duì)于順傾邊坡,δ≈60°,當(dāng)αδ時(shí)邊坡將可能產(chǎn)生傾倒破壞,當(dāng)αδ時(shí)邊坡通常產(chǎn)生順層面的"滑移-彎曲"或"滑移-拉裂"型破壞;反傾邊坡δ≈30°,當(dāng)αδ時(shí)邊坡才可能演化成明顯傾倒變形,當(dāng)αδ時(shí)邊坡不會(huì)傾倒或傾倒不明顯;對(duì)于地質(zhì)條件基本相同而坡體結(jié)構(gòu)不同的兩種邊坡,反傾邊坡形成的傾倒體無(wú)論是發(fā)育分布面積還是傾倒深度通常是大于順傾邊坡的,而且一旦形成傾倒體,二者的規(guī)模通常是深層的、大型或特大型的;傾倒體的分布面積和傾倒深度均呈現(xiàn)一種隨坡高的增加而增加的趨勢(shì),坡高H=250m時(shí)其分布面積和傾倒深度表現(xiàn)為陡然增加,并且反傾邊坡增加幅度大于順傾邊坡。
[Abstract]:In the previous research, the research of dumping deformation is more in the reverse slope than in the downdip slope, and there are many gaps in the formation of the toppling body of the two kinds of slope with different structure. On the basis of summing up a large number of examples of the dumping body, there are many gaps. The forming conditions and the developing scale characteristics of the toppling deformation of the layered and downdip slopes are studied in detail. The results show that the slope height H 100m and the slope angle 尾 35 擄are usually shown in the downdip slope. The dipping angle of rock is 偽 60 擄, the lithology is soft rock with thin layer or thin layer and interbedded with middle layer, and the rock with soft and hard phase; When the slope angle 尾 30 擄and rock stratum dip angle 偽 30 擄, the slope slope can be toppled. Its lithology is thin layer to medium thick layered soft rock, hard rock and hard rock with similar layered structure. The concept of "tipping critical dip angle 未" for bedded rock slope is put forward. For the downdip slope, 未 鈮，

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