本文選題：邊坡地貌演化　切入點(diǎn)：危巖座裂解體　出處：《重慶師范大學(xué)學(xué)報(bào)(自然科學(xué)版)》2017年03期

【摘要】：【目的】灰?guī)r地區(qū)的危巖表現(xiàn)為危巖聚集體,具有類砌體結(jié)構(gòu)特征;危巖座裂解體是灰?guī)r地區(qū)危巖破壞的核心科學(xué)問題。【方法】以在三峽庫區(qū)具有代表性的重慶市金佛山甄子巖為例,采用現(xiàn)場(chǎng)連續(xù)觀測(cè)和地貌學(xué)方法,研究灰?guī)r地區(qū)邊坡的發(fā)育機(jī)制問題。【結(jié)果】危巖的形成與破壞是灰?guī)r地區(qū)邊坡演化的主要?jiǎng)恿W(xué)機(jī)制,甄子巖危巖體下座過程中基座的碳質(zhì)頁巖表現(xiàn)出顯著的壓裂噴射現(xiàn)象,類砌體結(jié)構(gòu)底部快速解體;甄子巖坡腳碳質(zhì)頁巖自然風(fēng)化速度約48 mm·a-1,甄子巖危巖形成過程的地貌學(xué)解譯可概化為3個(gè)階段,每個(gè)過程邊坡后退35~40m,所需時(shí)間在600a左右;灰?guī)r地區(qū)巖質(zhì)邊坡演化在較短時(shí)間尺度(如甄子巖在600a左右)具有局部后退特征,但在較長時(shí)間尺度(如甄子巖在1 200a以上)表現(xiàn)為平行后退。【結(jié)論】研究成果對(duì)于科學(xué)解譯三峽庫區(qū)邊坡地貌演化規(guī)律、防治灰?guī)r地區(qū)危巖崩塌災(zāi)害有積極意義。
[Abstract]:[objective] the dangerous rock in limestone area is characterized by a mass of dangerous rock, which has the characteristics of masonry structure.The pyrolysis of perilous rock block is the core scientific problem of the destruction of dangerous rock in limestone area. [methods] taking the representative Jinfushan screening rock in the three Gorges Reservoir area as an example, continuous field observation and geomorphology methods are used.The mechanism of slope development in limestone area is studied. [results] formation and destruction of dangerous rock is the main dynamic mechanism of slope evolution in limestone area.The bottom of the similar masonry structure disintegrates rapidly, the natural weathering rate of carbonaceous shale at the foot of Zhenzi rock slope is about 48mm a-1, the geomorphological interpretation of the formation process of the dangerous rock in the Yanzi rock can be generalized into three stages, the slope retreating 35 ~ 40m in each process, and the time required is about 600a.The evolution of rock slope in limestone area has the characteristic of partial retrogression on a relatively short time scale (such as about 600a for the screening rock).But on a long time scale (for example, the Yanzi rock is more than 1 200 years old), it is shown that the parallel retrogression. [conclusion] the research results have positive significance for the interpretation of the geomorphological evolution law of the slope in the three Gorges Reservoir area and the prevention of the dangerous rock collapse disaster in the limestone area.
【作者單位】： 重慶交通大學(xué)巖土工程研究所;
【基金】：國家自然科學(xué)基金(No.51678067;No.51378521;No.11272185) 重慶市首席專家工作室專項(xiàng)經(jīng)費(fèi)(No.201605) 重慶市"兩江學(xué)者"計(jì)劃專項(xiàng)資金(No.201309) 2016年重慶高校創(chuàng)新團(tuán)隊(duì)建設(shè)計(jì)劃(No.CXTDG201602012)
【分類號(hào)】：P642.2

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