基于PLC控制系统的喷雾养护台车设计与应用

为解决二次衬砌混凝土脱模后存在裂纹、混凝土强度与耐久性不达标问题，减少混凝土裂缝、掉块等病害，通过引入自动化控制理念，并结合传统养护方式，研制了喷雾养护台车。该台车具有水温自动控制、湿度自动控制和养护行走自动控制的特点。通过加热系统，保证温差在15 ℃内，解决了由于养护水温与混凝土表面温差过大导致混凝土收缩开裂问题；通过湿度监控系统，保证混凝土表面湿度不低于90%，解决了混凝土表面吸水不充分问题；通过自动行走养护系统，保证了混凝土养护的时机与规范性。该设计可降低劳动强度，规范作业，节约水量，保证温差及养护要求，提高养护质量。

Design and Application of Spray Maintenance Trolley Based on PLC Control System

In order to solve the problems of concrete crack, concrete strength and durability not up to the standard and reduce concrete crack, drop and other diseases，the spray maintenance trolley is developed by combining the concept of automatic control and traditional maintenance method. The trolley has the characteristics of automatic water temperature control, humidity control and walking maintenance control. Through heating system, the temperature difference is guaranteed to be less than 15 degrees, which solves the problem of concrete shrinkage and cracking caused by excessive temperature difference between curing water and concrete surface. Through humidity monitoring system, concrete surface humidity is guaranteed to be no less than 90%, which avoids insufficient water absorption on concrete surface. Automatic walking maintenance system ensures the standardization of maintenance and solves the problem in manual maintenance. The design reduces labor intensity, standardizes operation, saves water, ensures temperature difference and maintenance requirements, and improves maintenance quality.