Analysis On Influencing Factors Of Landslide On Northeast Slope Of Piutou Mountain In Nanjing City

Located near nanshan training ground,pukou district,nanjing city,nanjing city,shandong beslope landslide caused direct economic loss of 2 million yuan,and estimated potential economic loss of 25 million yuan,and threatened to build a special road for nanshan training ground of nanjing army command college.Therefore,it is of great significance to carry out the research on the formation mechanism and prediction of landslide in the research area for the prevention and control of geological disasters,the safety of people's life and property,and the protection of military facilities.This paper finds out the geological environment conditions and development characteristics of the landslide in the area,and analyzes and evaluates the formation mechanism,stability and development trend of the landslide.The main research conclusions are as follows:1.The sliding surface of the landslide is a folding type,which is mainly located in the kaolin layer in contact with the impervious layer.2.Some geographical traffic and geological conditions in the study area are mainly introduced.The study area is located in the north slope of shandong province of zhutou and belongs to the erosional accumulation hill landform.The top of the slope is nanshan training ground,and there are residential buildings and enterprises at the bottom of the slope.There is no large water system distribution in the surrounding area,and only a small ditch and pond water system distribution in the local area.Moreover,there is no effective cut-off drainage system around the geological disaster sites,which is easy to cause the surface water overflow flow formed by atmospheric precipitation to form certain erosion on the slope.Meanwhile,due to the slow slope slope,atmospheric precipitation is easy to infiltrate and cause adverse impact on the slope stability.There are two main reasons for the formation of landslide.One is that the upper part of the landslide body is formed by mining the abandoned soil from the placer,which increases the load of the upper part of the slope body.Second,improper slope cutting at the foot of the slope leads to the formation of an air surface,which causes the landslide to lose its support.In addition,long-term rainfall infiltration and the softening effect of groundwater on the soil make the landslide unstable and sliding.3,landslides mainly happens on the period of heavy rainfall,the landslide area high underground water level,groundwater of concrete and corrosion of the reinforced concrete structure with micro,landslides drains seriously damaged,the trench wall deformation,distortion,and cracks,local trench wall connected to the groove fracture,several coping uplift drainage GouGou wall concrete,the landslide sliding zone mainly in the kaolin clay layer.4.The landslide prevention and control engineering treatment scheme in the research area adopts the gantry type double-row anti-slide piles to analyze the formation mechanism of the landslide in the research area from various aspects.Under the state of heavy rainfall,slow creep is easy to occur,indicating the influence of rainfall on geological disasters.In human engineering activities,the mountain is filled with landfills to form a thick soil layer.Houses and factories are built to cut the slope of the mountain,forming an unfavorable slope shape with the foot of the slope facing the sky,which brings great hidden dangers to the landslide disaster.5.The stability analysis of the landslide shows that all sections are in stable state under natural state;The three sections are all in unstable state under heavy rainfall condition,which is consistent with the fact that landslides mainly occur in heavy rainfall period.It is generally believed that the landslide is in an unstable state and may slide in whole and part under certain inducement.