工程地质学报
工程地質學報
공정지질학보
2014年
3期
379-385
,共7页
王佳运%石小亚%冯卫
王佳運%石小亞%馮衛
왕가운%석소아%풍위
黄土塬边滑坡%分布规律%发育背景%掀斜运动%渭河北迁
黃土塬邊滑坡%分佈規律%髮育揹景%掀斜運動%渭河北遷
황토원변활파%분포규률%발육배경%흔사운동%위하북천
Landslide at the edge of loess table land%Distribution regular%Development background%Tilting movement%Northward movement of Weihe river
在前人工作的基础上,借助实地调查、勘查等手段,分析研究了陕西省宝鸡-常兴段黄土塬边滑坡分布规律与发育背景。通过分析、研究认为:(1)宝鸡-常兴段黄土塬边自西向东滑坡规模由特大型向大型、中型甚至小型渐变;(2)三级阶地缺失或三级、二级阶地同时缺失地段均有滑坡发育;(3)宝鸡-常兴段黄土塬边滑坡集中发育在3个时期:晚更新世初期、全新世初期与全新世漫滩期;(4)渭河盆地西部地壳差异性向东掀斜运动形成了不同高差级别台塬的地貌格局,决定了滑坡发育规模的规律性变化;渭河北迁与侵蚀加剧造成了宝鸡-常兴段黄土塬边滑坡不同时期的集中出现;(5)人类工程活动的加剧是漫滩侵蚀期新滑坡或古老滑坡复活的主要诱发因素。
在前人工作的基礎上,藉助實地調查、勘查等手段,分析研究瞭陝西省寶鷄-常興段黃土塬邊滑坡分佈規律與髮育揹景。通過分析、研究認為:(1)寶鷄-常興段黃土塬邊自西嚮東滑坡規模由特大型嚮大型、中型甚至小型漸變;(2)三級階地缺失或三級、二級階地同時缺失地段均有滑坡髮育;(3)寶鷄-常興段黃土塬邊滑坡集中髮育在3箇時期:晚更新世初期、全新世初期與全新世漫灘期;(4)渭河盆地西部地殼差異性嚮東掀斜運動形成瞭不同高差級彆檯塬的地貌格跼,決定瞭滑坡髮育規模的規律性變化;渭河北遷與侵蝕加劇造成瞭寶鷄-常興段黃土塬邊滑坡不同時期的集中齣現;(5)人類工程活動的加劇是漫灘侵蝕期新滑坡或古老滑坡複活的主要誘髮因素。
재전인공작적기출상,차조실지조사、감사등수단,분석연구료합서성보계-상흥단황토원변활파분포규률여발육배경。통과분석、연구인위:(1)보계-상흥단황토원변자서향동활파규모유특대형향대형、중형심지소형점변;(2)삼급계지결실혹삼급、이급계지동시결실지단균유활파발육;(3)보계-상흥단황토원변활파집중발육재3개시기:만경신세초기、전신세초기여전신세만탄기;(4)위하분지서부지각차이성향동흔사운동형성료불동고차급별태원적지모격국,결정료활파발육규모적규률성변화;위하북천여침식가극조성료보계-상흥단황토원변활파불동시기적집중출현;(5)인류공정활동적가극시만탄침식기신활파혹고로활파복활적주요유발인소。
This paper is based on the predecessors′research and is aided with investigation and prospection at field.It analyzes the distribution regularity and development background of landslides at the edge of the loess table lands from Baoji to Changxing.It proves the following five points.(1 )The scales of the landslides decrease gradually from super large to large and middle,even small.(2)Landslides are at these sites where Ⅲ terrace or both Ⅲ and Ⅱ terrace disappeared.(3)Development of landslides mainly has three periods:early stage of late Pleistocene epoch,early stage of Holocene epoch and last stage of Holocene epoch.(4 )The eastward tilting movement with activity difference of the lithosphere in the west of Weihe river basin resulted in the physiognomy pattern of tablelands with distinct altitude differences.Then it controlled the development regular change of scales of the landslides.The northward movement of Weihe river and intense riverside eroding induced the concentrated development of landslides at the edge of the tablelands in different periods.(5 )The intense human engineering movements are the main inducing factor of new landslides or revival of old landslides in late stage of Holocene.