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Mechanical Properties of Prefabricated Assembly Utility Tunnel Construction and Field Full-scale Test Study in the Process of Erection of Utility Tunnels
(1. No.6 Engineering Co., Ltd., CCCC Second Highway Engineering, Xi′an 710075; 2. Engineering Design & Research Institute, CCCC Second Highway Engineering Co., Ltd., Xi′an 710065; 3. Key Laboratory of Geotechnical and Underground Engineering of the Ministry of Education, College of Transportation Engineering, Tongji University, Shanghai 200092)
Abstract In order to solve the problem of inadequate installation accuracy of large tonnage hoisting of prefabricated assembly utility tunnel in Xiong'an New Area, a construction scheme of erecting utility tunnel segment is proposed.By establishing the finite element calculation model of the prefabricated assembly utility tunnel, the mechanical properties of the utility tunnel during the construction of erection are calculated and analyzed, and the calculation results are verified by carrying out the field full-scale model test. The results show that: (1) During the construction of erection of utility tunnels, the performance of the structural material meets the design requirements in the case of lifting under asymmetric load and in the case of lifting through a hole, the maximum tensile stress of structural concrete is less than the tensile strength of the material, and the structure is still in a safe state. (2) During the field test of erection of utility tunnels, stress and deformation results at the key positions of the utility tunnels meet the design requirements. (3) The construction scheme of erection is applicable to long section and large tonnage prefabricated assembly utility tunnels, which can ensure structural safety during construction.
Abstract：
In order to solve the problem of inadequate installation accuracy of large tonnage hoisting of prefabricated assembly utility tunnel in Xiong'an New Area, a construction scheme of erecting utility tunnel segment is proposed.By establishing the finite element calculation model of the prefabricated assembly utility tunnel, the mechanical properties of the utility tunnel during the construction of erection are calculated and analyzed, and the calculation results are verified by carrying out the field full-scale model test. The results show that: (1) During the construction of erection of utility tunnels, the performance of the structural material meets the design requirements in the case of lifting under asymmetric load and in the case of lifting through a hole, the maximum tensile stress of structural concrete is less than the tensile strength of the material, and the structure is still in a safe state. (2) During the field test of erection of utility tunnels, stress and deformation results at the key positions of the utility tunnels meet the design requirements. (3) The construction scheme of erection is applicable to long section and large tonnage prefabricated assembly utility tunnels, which can ensure structural safety during construction.
SHAN Hongwei1 SUN Mao2 XIAN Jianping2 ZHU Li2 YU Haitao3
.Mechanical Properties of Prefabricated Assembly Utility Tunnel Construction and Field Full-scale Test Study in the Process of Erection of Utility Tunnels[J] MODERN TUNNELLING TECHNOLOGY, 2022,V59(6): 147-153
2022, Vol. 59 