摘要
泵送大体积混凝土具有水化热温升高和温升快的特点,直接采用低温水通水冷却,易使得进水温度和混凝土内部温度之间温差过大,而人工调控水温工作量大且效率低,本研究基于无线温度采集装置、换水装置和电控装置,结合水箱自循环水,设计了一套适用于泵送混凝土的通水冷却远程调控系统。该系统以预设混凝土内部最高温度和进水温度之间的允许温差为约束条件,利用冷水置换水箱一定体积的热水,从而在水箱中调控获得合适的水温进行通水冷却,以实现更优降温效果。升金湖泵站工程实践中根据设定的允许温差20℃采用该系统进行多次远程调控后,虽然随着混凝土温度逐渐升高,进水温度在19.0~54.5℃动态变化,但混凝土内部温度和进水温度之间的温差能够控制在19.9℃以内,表明该系统能较好地调控进水温度,提升泵送大体积混凝土温控的智能化水平。
Pumped mass concrete is characterized by high hydration-heat temperature rise and rapid temperature increase.Direct cooling with low-temperature water can easily result in an excessive temperature difference between the cooling water and the internal temperature of the pouring block.Manual water temperature regulation,moreover,is labor-intensive and inefficient To address these issues,this paper developed a remote control regulation system for pipe cooling of pumping concrete.The system integrated a wireless temperature acquisition device,a water exchange device,and an electronic control device unit with a self-circulating water tank.A preset allowable temperature difference between the maximum internal temperature of the pouring block and the inlet water temperature served as the constraint.Cold water from well was used to displace a certain volume of hot water in the water tank,thereby achieving a suitable water temperature.This process ensured the temperature difference between the concrete and the cooling water complies with the standard,optimizing the cooling effect.A successful application in the ongoing Shengjin Lake Pump Station project demonstrated the system's effectiveness.With the allowable temperature difference set at 20 C,multiple rounds of remote adjustment were performed.As the temperature of the pouring block gradually increased,the inlet water temperature was dynamically adjusted within a range of 19.0°C to 54.5°C.The temperature difference between the concrete and the inlet water was effectively controlled within 19.9 C.This practice confirmed that the system proficiently regulates the cooling water temperature,thereby enhancing the intelligence of temperature control for mass pumped concrete.
作者
王湘虎
向紫怡
余进
钟胜
许新刚
黄耀英
WANG Xianghu;XIANG Ziyi;YU Jin;ZHONG Sheng;XU Xing´ang;HUANG Yaoying(Anhui Shui'an Construction Group Co.,Ltd.,Hefei 230000,China;College of Hydraulic&Environmental Engineering,China Three Gorges University,Yichang 443002,China)
出处
《江淮水利科技》
2025年第6期59-64,共6页
Jianghuai Water Resources Science and Technology
基金
国家自然科学基金项目(52239009)。
关键词
泵送混凝土
通水冷却
远程控制
进水温度
混凝土温度
pumped concrete
water cooling
remote control
inlet water temperature
concrete temperature
