“Escape device with mechanical speed limiter for operator working at heights”, which is a national major R&D project, 

has successfully been applied in S06 section of Shenzhen-Zhongshan Bridge from 12^th to 14^th March. The application 

demonstrated that the controlled descent escape from super-high structure up to 300 m is achievable by means of this 

escape device.

The escape system with inclined descent function, which moves up along with the height of pylon pillar in construction, 

is invented and used for emergency escape from a structure up to 300 m.  R&D of thesystem has broken through the

national technical indicators andreferred to a large number of international standards.  Application of the group standard

in Shaanxi Province for the system has been submitted for approval at present.The escape system was highly appraised 

by the expert group as "world leading" with a total score of 95.57 in the performance evaluation in Wuhan on 17^thMarch, 2021.

Demonstration test of the escape system is performed in conditions of 128 m of vertical descent height, 200 kg of max. 

carrying capacity and 1.5 m/s of descent speed limit; the escape descent of operator is guided by the system with 18 º 

of inclined angle. The test has demonstrated that the escape device coordinates with jumping formwork perfectly during

 the construction process, is applicable to a variety of complex construction environments and has versatility.In case unintended

 risk occurs on the working platform of pylon pillar, the operator can escape in emergency by means of the device.  R&D of

the system fills in the gap of escape device for working at heights in the construction stage of construction industry.  Investigation

 worldwide shows that the escape device is the only one that realizes safe escape from super-high pylon pillar up to 300 m.

The escape device is the first one that realizessafe escape from a super-high structureat an inclined angle, and is the only

 one that enables 2-persons descend simultaneously.

Shenzhen-Zhongshan Bridge is a doublepylonsuspension bridge with 580 m of main span.The pylon is an H-shaped concrete 

structure with 213.5 m in height.  The escape system has been used successfully on the west pylon of the bridge under 

construction and the reliability of the escape device verified. In addition, practical tests of the escape system have also 

been performed at site of Jiangxinzhou Yangtze River Bridge in Nanjing and Yangbaoshan Bridge of Gui-Huang Expressway. 

 The successful application of the system has helped accumulation ofexperience on emergency measures for safe working

 at heights in bridge construction. Furthermore, the successful applications of the escape system in various environments

 have a very important practical significance for improving the relevant technical standards at home and abroad.