为给管养单位提供实时的高速公路桥面路况信息,使管养单位能有目的地对桥面交通进行保养和维护,提出在桥面布设无线传感器来检测桥面的温湿度信息、倾斜度信息、结冰信息、振动信息和位移信息等,并采用LoRa(Long Range Radio)无线传输...为给管养单位提供实时的高速公路桥面路况信息,使管养单位能有目的地对桥面交通进行保养和维护,提出在桥面布设无线传感器来检测桥面的温湿度信息、倾斜度信息、结冰信息、振动信息和位移信息等,并采用LoRa(Long Range Radio)无线传输技术将采集到的数据信息汇聚到一体化机柜中。利用视频事件检测器、毫米波雷达来监测桥面的交通事故和拥堵情况,并将这些信息同无线传感器采集到的数据信息一起汇聚到一体化机柜中,再通过沿高速公路铺设的主干光缆传输至监控分中心工作站,为工作人员提供实时的交通信息,同时采用LED(发光二极管)可变信息情报板向来车司机显示桥面的路况信息。该方案能够有效协助工作人员监测桥面的路况信息,也能提醒来车司机前方桥面路况,提高驾驶的安全性。展开更多
The paper presents examples of technological designs for concrete placement in road bridges constructed during the S5/S 10 expressway extension in Poland. The project included eight concrete or composite bridge struct...The paper presents examples of technological designs for concrete placement in road bridges constructed during the S5/S 10 expressway extension in Poland. The project included eight concrete or composite bridge structures with different numbers of decks. The concrete placement technology is presented for the following bridge decks： slabs cast-in-situ, composite with precast or VFT （prefabricated composite beam） beams and mixed with cast in situ slabs and VFT-WIB （filler beam） beams. Continuous concrete placement was adopted for almost all the bridge superstructures except the mixed-type decks where construction joints were necessary. To control shrinkage, formwork deformations and existing restraints, the concrete was poured in layers and in stages. The design pace of concrete placement was moderate to be regulated at site without compromising safety and quality. The placement methods enabled both efficient and safe concrete pours.展开更多
文摘为给管养单位提供实时的高速公路桥面路况信息,使管养单位能有目的地对桥面交通进行保养和维护,提出在桥面布设无线传感器来检测桥面的温湿度信息、倾斜度信息、结冰信息、振动信息和位移信息等,并采用LoRa(Long Range Radio)无线传输技术将采集到的数据信息汇聚到一体化机柜中。利用视频事件检测器、毫米波雷达来监测桥面的交通事故和拥堵情况,并将这些信息同无线传感器采集到的数据信息一起汇聚到一体化机柜中,再通过沿高速公路铺设的主干光缆传输至监控分中心工作站,为工作人员提供实时的交通信息,同时采用LED(发光二极管)可变信息情报板向来车司机显示桥面的路况信息。该方案能够有效协助工作人员监测桥面的路况信息,也能提醒来车司机前方桥面路况,提高驾驶的安全性。
文摘The paper presents examples of technological designs for concrete placement in road bridges constructed during the S5/S 10 expressway extension in Poland. The project included eight concrete or composite bridge structures with different numbers of decks. The concrete placement technology is presented for the following bridge decks： slabs cast-in-situ, composite with precast or VFT （prefabricated composite beam） beams and mixed with cast in situ slabs and VFT-WIB （filler beam） beams. Continuous concrete placement was adopted for almost all the bridge superstructures except the mixed-type decks where construction joints were necessary. To control shrinkage, formwork deformations and existing restraints, the concrete was poured in layers and in stages. The design pace of concrete placement was moderate to be regulated at site without compromising safety and quality. The placement methods enabled both efficient and safe concrete pours.
