Abstract Mechanical pipe jacking construction technology is characterized by many advantages, such as fast construction, high automation, safety, reliability, and less impact on surroundings; it is therefore of great importance in the construction of heat supply tunnels. During the operation phase, a heat supply tunnel will be subjected to a high environmental temperature and internal forces of constant thrust, guiding thrust, and so on. This paper analyzes the deformation and mechanical state of the mechanically jacked reinforced concrete pipe for a heat supply tunnel in different temperatures by means of field testing and theoretical calculation. The results were verified by engineering practice. Additionally, it summarizes how the design and calculation method for reinforced concrete pipes are applicable to heat supply engineering. Finally, it concludes that the calculation results for the structural design of the reinforced concrete pipe in a jacked heat supply tunnel are similar to the test results with more safety redundancy, provided that a reduction method for the concrete strength and elastic modulus is used.
Abstract：
Mechanical pipe jacking construction technology is characterized by many advantages, such as fast construction, high automation, safety, reliability, and less impact on surroundings; it is therefore of great importance in the construction of heat supply tunnels. During the operation phase, a heat supply tunnel will be subjected to a high environmental temperature and internal forces of constant thrust, guiding thrust, and so on. This paper analyzes the deformation and mechanical state of the mechanically jacked reinforced concrete pipe for a heat supply tunnel in different temperatures by means of field testing and theoretical calculation. The results were verified by engineering practice. Additionally, it summarizes how the design and calculation method for reinforced concrete pipes are applicable to heat supply engineering. Finally, it concludes that the calculation results for the structural design of the reinforced concrete pipe in a jacked heat supply tunnel are similar to the test results with more safety redundancy, provided that a reduction method for the concrete strength and elastic modulus is used.
.On the Design of a Reinforced Concrete Pipe
for a Heat Supply Tunnel Constructed by Pipe Jacking[J] MODERN TUNNELLING TECHNOLOGY, 2013,V50(3): 115-123
2013, Vol. 50 