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Study on the Self-propelling Function of Sleeve-type Screw-driven Tunnel Boring Machine for Excavating Rescue Channel in Loose Rock and Soil
(1. College of Architecture and Civil Engineering of BJUT, Beijing 100124; 2. Beijing Municipal One Construction Supervision Co.,Ltd., Beijing 100083; 3. China Construction Eighth Engineering Division Transit Construction Co., Ltd., Nanjing 210046)
Abstract It is the primary task of emergency rescue to quickly, efficiently and timely excavate the rescue channel to the place where people are trapped (buried) in the loose rock and soil medium with geological disasters such as landslides or debris flow, tunnel collapse and earthquakes. This paper introduces a new type of tunneling technology and equipment that relies on the rotation of multiple long helices mounted parallel to the periphery of the cylindrical tunnel boring machine to drive the entire boring machine to traverse and excavate independently in the loose rock and soil, analyzes the structure of the tunnel boring machine and the self-propelling mechanism, and deduces the conditions for the self-propelling of the sleeve-type screw-driven tunnel boring machine. Based on the reasonable values of the parameters of helical tooth height, tooth root pitch and tooth profile angle obtained by laboratory tests,the first test prototype of the sleeve-type screw-driven tunnel boring machine has been developed. In the field test,the prototype autonomously moves forward for a distance of 10 m in the loose soil, which proves the feasibility of using the screw-driven principle to autonomously move forward to excavate the rescue channel in loose rock and soil media, and provides safe and rapid construction technology and equipment for the construction of rescue channel to rescue trapped people in similar disasters and accidents.
Abstract：
It is the primary task of emergency rescue to quickly, efficiently and timely excavate the rescue channel to the place where people are trapped (buried) in the loose rock and soil medium with geological disasters such as landslides or debris flow, tunnel collapse and earthquakes. This paper introduces a new type of tunneling technology and equipment that relies on the rotation of multiple long helices mounted parallel to the periphery of the cylindrical tunnel boring machine to drive the entire boring machine to traverse and excavate independently in the loose rock and soil, analyzes the structure of the tunnel boring machine and the self-propelling mechanism, and deduces the conditions for the self-propelling of the sleeve-type screw-driven tunnel boring machine. Based on the reasonable values of the parameters of helical tooth height, tooth root pitch and tooth profile angle obtained by laboratory tests,the first test prototype of the sleeve-type screw-driven tunnel boring machine has been developed. In the field test,the prototype autonomously moves forward for a distance of 10 m in the loose soil, which proves the feasibility of using the screw-driven principle to autonomously move forward to excavate the rescue channel in loose rock and soil media, and provides safe and rapid construction technology and equipment for the construction of rescue channel to rescue trapped people in similar disasters and accidents.
LU Qingguo1 MA Shaojun2 YAO Wenjie3 ZHANG Peng2
.Study on the Self-propelling Function of Sleeve-type Screw-driven Tunnel Boring Machine for Excavating Rescue Channel in Loose Rock and Soil[J] MODERN TUNNELLING TECHNOLOGY, 2023,V60(1): 256-261
2023, Vol. 60 