Vibration replacement gravel pile is one of the key technical methods to solve the problem of deep overburden layer in hydropower development in southwest China. As a concealed project,the construction quality management of vibration replacement gravel pile is affected by many adverse conditions. In order to overcome the problems in traditional vibration replacement gravel pile quality management system,such as human factors,low timeliness of quality management,based on the foundation treatment of Yingliangbao Hydropower Project,this paper the quality management process of vibration replacement gravel pile was combed,and a set of construction quality management system of vibrating replacement gravel pile was developed,which can effectively improve the construction quality management level of vibrating replacement gravel pile.
Based on the example of the middle pier foundation protection of Jinlong Bridge on Dadu River in Jinkouhe District,Leshan City,this paper analyzes and summarizes the construction characteristics,construc-tion technology and quality inspection methods of high-pressure jet grouting piles and steel pipe piles.Practice has proved that the combined application of high-pressure jet grouting piles and steel pipe piles can combine strong points of each other to make up for their mutual deficiencies to achieve the expected effect,which can provide reference for the construction of similar projects in the future.
The rigid body limit equilibrium method is used to review and calculate the anti-sliding stability of arch dam abutment of a hydropower station,and a sensitivity analysis is carried out for the mechanical parameters of structural plane and the reduction coefficient of uplift pressure.The calculation results show that the anti-sliding stability and safety of arch dam abutment meet the specification requirements,and there is a large safety margin,which can provide reference for the safe operation and management of the hydropower station dam.
2023年10月28日9时13分,由水电十局机电安装分局承建的西藏那曲色尼区欧码亭嘎100兆瓦风电项目24号风机轮毂与发电机机舱顺利完成对接,标志着西藏那曲100兆瓦风电项目25台风机全部顺利完成吊装,为年内全容量并网发电目标奠定了坚实的基础.
The tailrace tunnel of Karuma Hydropower Station in Uganda is divided into three branch tunnel con-struction sections:N0.8 and No.9,and the tailrace.During the construction process,the electrical equipment used in the tunnel includes concrete pump trucks,multi-arm drilling machines,water pump drainage systems,ventilators,lighting and various types of small power tools used in construction.Due to the far distance be-tween the working face and the tunnel opening and the high power of electrical equipment,it is necessary to in-troduce 10 kV high voltage into the tunnel and reduce the voltage to 400 V to meet the use of electrical equip-ment.Therefore,how to choose suitable 10 kV distribution equipment,electrical materials,ensure qualified power supply and safe operation of safe operation of the distribution system.This article takes the construction area of the No.8 adit as an example to organize the selection principles and calculation methods,which can provide reference for similar projects.
