摘要
Abstract
Aiming at the working conditions of increasing construction depth,complex geology and harder stratum of domestic diaphragm walls,combined with the characteristics and difficulties of double-wheel milling equipment at home and abroad,this paper carries out the development and application research of air-lift reverse circulation double-wheel milling machine to support the construction of deep,large and high-precision diaphragm walls in complex stratum.Guided by the concept of greenization,intelligence and digitalization,the core goal of this research is to solve the problems of efficient slag discharge by air-lift reverse circulation,efficient construction in complex stratum and high-precision trench formation,and improve the adaptability,efficiency and trench quality of this equipment.Three key systems are developed:firstly,the air-lift reverse circulation slag discharge system,which adopts the combination of numerical simulation and experimental verification to optimize parameters and pipelines,with the slag discharge efficiency increased by more than 30%compared with traditional equipment;secondly,the high-torque and high-reliability milling wheel,whose structure is optimized and high-strength wear-resistant materials are selected to solve the problems of insufficient power and easy damage in hard stratum milling and extend the service life;thirdly,the adaptive control system,which realizes the precise control of uniform lowering and micro-feeding of the milling mechanism through closed-loop control of feeding speed and feedback of travel sensor,ensuring the verticality of trench formation.The equipment has been applied in many deep and large diaphragm wall projects,with the construction efficiency increased by 25%-40%,energy consumption and cost significantly reduced.,and it is suitable for various complex hard stratum.关键词
双轮铣/气举反循环/自适应控制/连续墙施工Key words
trench cutter/air-lift reverse circulation/adaptive control/diaphragm wall construction分类
天文与地球科学
