本文選題：泥林　切入點：滲透破壞　出處：《吉林大學(xué)》2017年碩士論文

【摘要】：中入字井北溝潛蝕錯落邊坡位于泥林國家地質(zhì)公園的形成區(qū),潛蝕錯落災(zāi)害沿溝谷邊坡發(fā)育,面積大,危及道路、房屋、農(nóng)田及村民,同時嚴重制約著泥林景觀的發(fā)展。目前坡頂垂直裂隙、串珠狀落水洞發(fā)育,潛蝕錯落災(zāi)害范圍逐年增大,急需治理。由于土質(zhì)特殊,同時受地表水的入滲及地下水的潛蝕作用,中入字井北溝潛蝕錯落災(zāi)害形成機制獨特,與以往的土坡崩塌、滑坡破壞形式不同,目前對該破壞模式及評價體系還不完善。因此分析潛蝕錯落破壞機理及演化過程,建立潛蝕錯落邊坡評價方法,對泥林潛蝕錯落災(zāi)害治理具有重要的理論意義及迫切的現(xiàn)實意義。泥林潛蝕錯落災(zāi)害的治理工作已于2013年啟動,但從目前的治理效果來看,由于缺乏對地下水潛蝕作用的認識,導(dǎo)致治理工程失敗。本文針對中入字井北溝潛蝕錯落的形成機制,以最大限度的保證泥林形成區(qū)地貌景觀的完整性為基本原則,對多種方法適宜性進行分析,最終提出了潛蝕錯落災(zāi)害治理建議。論文取得的主要成果如下:(1)對中入字井北溝潛蝕錯落進行了地質(zhì)勘察,收集相關(guān)地質(zhì)、氣象資料,查明了地形地貌、地層、地下水位等工程地質(zhì)條件;(2)中入字井潛蝕錯落邊坡土體顆粒以粉粒為主,易溶鹽含量較高,容易被地表水侵蝕和地下水潛蝕;孔隙率高,垂直節(jié)理發(fā)育,干燥情況下具有很好的直立性,坡頂遇水易沿節(jié)理裂隙發(fā)生下滲潛蝕;(3)通過現(xiàn)場調(diào)查,分析了中入字井北溝潛蝕錯落破壞過程,并從潛蝕力學(xué)原理和潛蝕錯落破壞過程出發(fā),研究潛蝕錯落評價方法,并對中入字井北溝潛蝕錯落四個典型剖面進行了穩(wěn)定性評價;(4)對多治理方法適宜性進行探討,并根據(jù)中入字井北溝潛蝕錯落破壞機理,提出了采用坡頂?shù)乇斫厮疁�、坡腳設(shè)置水平排水孔、坡底布設(shè)抗沖刷結(jié)構(gòu)的綜合治理方案。
[Abstract]:The Beigou submersible slope of Zhongjin well is located in the forming area of the mud forest national geopark. The potential erosion disaster develops along the gully slope and has a large area, which endangers roads, houses, farmland and villagers. At the same time, the development of mud forest landscape is seriously restricted. At present, vertical fissure at the top of the slope, beaded caverns are developed, and the range of potential erosion disaster increases year by year, which is in urgent need of treatment. Because of the special soil quality, it is also affected by the infiltration of surface water and the latent erosion of groundwater. The formation mechanism of subsurface erosion in Beigou of Zhongjin well is unique, which is different from the collapse of soil slope and the failure form of landslide. At present, the failure mode and evaluation system are not perfect. Therefore, the mechanism and evolution process of subsurface erosion and dislocation are analyzed. It is of great theoretical and practical significance to establish the evaluation method of subsurface erosion slope, which is of great theoretical and practical significance to the management of submerged erosion disaster of mud forest. The management of hidden erosion disaster of mud forest has been started in 2013, but from the point of view of the current control effect, Due to the lack of understanding of groundwater subsurface erosion, the treatment project failed. In view of the formation mechanism of underlying erosion in Beigou of Zhongjin well, the basic principle is to ensure the integrity of geomorphological landscape in mud-forest forming area to the maximum extent. This paper analyzes the suitability of various methods, and finally puts forward some suggestions for controlling the potential erosion disaster. The main results obtained in this paper are as follows: 1) the geological survey of the subsurface erosion in the Beigou of Zhongjin well is carried out, and the relevant geological and meteorological data are collected. The engineering geological conditions such as topography, geomorphology, strata, groundwater level and other engineering geological conditions are found out.) the subsurface erosion in the well is dominated by silt particles, the content of soluble salt is relatively high, and it is easy to be eroded by surface water and groundwater, and the porosity is high. The vertical joints are developed and the dry condition is very upright, and the top of the slope is prone to infiltrate and erode along the joint fissure. (3) based on the field investigation, the process of subsurface erosion and failure in the north trench of the middle entry well is analyzed. Based on the principle of submersible erosion mechanics and the process of submersible erosion, the evaluation method of submersible erosion is studied, and the stability evaluation of four typical sections of Beigou subsurface erosion in Zhongying well is carried out, and the suitability of multiple control methods is discussed. On the basis of the mechanism of subsurface erosion and failure in the north trench of the middle entry well, a comprehensive treatment scheme is put forward, which adopts the surface interception ditch at the top of the slope, the horizontal drainage hole at the foot of the slope, and the anti-scour structure on the bottom of the slope.
【學(xué)位授予單位】：吉林大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：P642.2

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