Research on Construction Posture Control Technology for Shallow Buried
Extra-large Section Combined Rectangular Pipe Jacking with Tight Gaps
(1. Sinohydro Bureau 11 Co.，Ltd.，Zhengzhou 450001; 2. China Power Construction South Construction Investment Co., Ltd.,Shenzhen 518055; 3. School of Civil and Transportation Engineering, Shenzhen University, Shenzhen 518060; 4. China Railway Safety Engineering Consulting Co.，Ltd.，Tianjin 300171; 5. Shenzhen Metro Group Co., Ltd., Shenzhen 518026)
Abstract：
To better address the issues of posture control and deviation correction during construction of rectangular
pipe jacking with tight gaps, this study takes the Shasan Station project of Shenzhen Metro Line 12 as a case study.A new anti-rolling device was developed, the upper and lower multi-screw conveyors for controlling soil pressure was designed, and a detachable steel ring as the tunnel portal structure was installed for left and right pipe jacking with tight gaps. Posture control technologies such as hinged hydraulic cylinder correction, cutterhead control correction, and soil grouting correction were combined to complete the jacking of extra-large section combined rectangular pipes with tight gaps. On-site measurement data show that after the pipe jacking was completed, the horizontal and vertical deviations of the pipe segments in both the left and right lines were within the design control values, meeting the specification requirements, with good control of the jacking pipe axis. The impact of secondary jacking with tight
gaps on the posture of the pipe was analyzed, and it was found that the posture of the right line pipe fit well with the left line pipe. The lateral fit distance between the left and right pipes was reasonable, with no collision phenomenon observed. Although the distance between the jacking pipes was 15% larger than the set value, it still met the overall jacking construction requirements.
JIN Zhengxing1 GUO Ping2 ZHOU Wenpeng1 HU Qiao? SU Dong3 ZHAO Jiaxin1 SUN Bo?
.Research on Construction Posture Control Technology for Shallow Buried
Extra-large Section Combined Rectangular Pipe Jacking with Tight Gaps[J] MODERN TUNNELLING TECHNOLOGY, 2025,V62(1): 259-266
2025, Vol. 62 