A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Field measurement on the interaction between socketed pipes during pipe-roof jacking in soft ground and corresponding surface settlement
https://orcid.org/0000-0001-7164-4135
Highlights The interaction effects between socketed pipes during jacking were revealed. The closure error evolution law of the large-scale pipe-roof was investigated. A numerical pipe-roof jacking model considering constraint effect was developed. The impacts of the interaction effects on the surface settlement were concluded.
Abstract Pipe-roof Pre-construction Method (PPM) usually acts as an auxiliary trenchless technology for large underground excavation to assure construction safety and protect surrounding facilities. During the construction process of PPM, complex interaction would take place between inner-connected pipes (socketed pipes), which could affect the closure of the pipe-roof and ground settlement. Nevertheless, scarce research was carried out to explore these interaction effects and their impacts. In this paper, a comprehensive field measurement for a large undercrossing project in Shanghai soft ground by means of roof-box jacking (RBJ) was conducted on the postures of a group of socketed pipes and surface settlements. Based on the observations, several conclusions could be drawn: 1) Notable constraint effect between sockets (especially in the direction perpendicular to the pipe row) and jacking distance effect of pipe were observed via the statistical analysis of the relative deviations. 2) Closure quality of the pipe-roof was well maintained when launching and jacking in the reinforced zone, but closure errors soared in the zones beyond owing to the jacking distance effect, which could cause clearance invasion and even block the latter jacking of box culvert. 3) The surface settlement was successfully controlled within 25 mm without interruption on the traffic above. The shielding effect, repeated disturbance effect and constraint effect had a non-negligible impact on the magnitude and distribution of surface settlement. The case serves as a valued example for engineers to understand the origin and effect of group-jacking deviations and better control the jacking precision and ground disturbance.
Field measurement on the interaction between socketed pipes during pipe-roof jacking in soft ground and corresponding surface settlement
https://orcid.org/0000-0001-7164-4135
Highlights The interaction effects between socketed pipes during jacking were revealed. The closure error evolution law of the large-scale pipe-roof was investigated. A numerical pipe-roof jacking model considering constraint effect was developed. The impacts of the interaction effects on the surface settlement were concluded.
Abstract Pipe-roof Pre-construction Method (PPM) usually acts as an auxiliary trenchless technology for large underground excavation to assure construction safety and protect surrounding facilities. During the construction process of PPM, complex interaction would take place between inner-connected pipes (socketed pipes), which could affect the closure of the pipe-roof and ground settlement. Nevertheless, scarce research was carried out to explore these interaction effects and their impacts. In this paper, a comprehensive field measurement for a large undercrossing project in Shanghai soft ground by means of roof-box jacking (RBJ) was conducted on the postures of a group of socketed pipes and surface settlements. Based on the observations, several conclusions could be drawn: 1) Notable constraint effect between sockets (especially in the direction perpendicular to the pipe row) and jacking distance effect of pipe were observed via the statistical analysis of the relative deviations. 2) Closure quality of the pipe-roof was well maintained when launching and jacking in the reinforced zone, but closure errors soared in the zones beyond owing to the jacking distance effect, which could cause clearance invasion and even block the latter jacking of box culvert. 3) The surface settlement was successfully controlled within 25 mm without interruption on the traffic above. The shielding effect, repeated disturbance effect and constraint effect had a non-negligible impact on the magnitude and distribution of surface settlement. The case serves as a valued example for engineers to understand the origin and effect of group-jacking deviations and better control the jacking precision and ground disturbance.
Field measurement on the interaction between socketed pipes during pipe-roof jacking in soft ground and corresponding surface settlement
https://orcid.org/0000-0001-7164-4135
Highlights The interaction effects between socketed pipes during jacking were revealed. The closure error evolution law of the large-scale pipe-roof was investigated. A numerical pipe-roof jacking model considering constraint effect was developed. The impacts of the interaction effects on the surface settlement were concluded.
Abstract Pipe-roof Pre-construction Method (PPM) usually acts as an auxiliary trenchless technology for large underground excavation to assure construction safety and protect surrounding facilities. During the construction process of PPM, complex interaction would take place between inner-connected pipes (socketed pipes), which could affect the closure of the pipe-roof and ground settlement. Nevertheless, scarce research was carried out to explore these interaction effects and their impacts. In this paper, a comprehensive field measurement for a large undercrossing project in Shanghai soft ground by means of roof-box jacking (RBJ) was conducted on the postures of a group of socketed pipes and surface settlements. Based on the observations, several conclusions could be drawn: 1) Notable constraint effect between sockets (especially in the direction perpendicular to the pipe row) and jacking distance effect of pipe were observed via the statistical analysis of the relative deviations. 2) Closure quality of the pipe-roof was well maintained when launching and jacking in the reinforced zone, but closure errors soared in the zones beyond owing to the jacking distance effect, which could cause clearance invasion and even block the latter jacking of box culvert. 3) The surface settlement was successfully controlled within 25 mm without interruption on the traffic above. The shielding effect, repeated disturbance effect and constraint effect had a non-negligible impact on the magnitude and distribution of surface settlement. The case serves as a valued example for engineers to understand the origin and effect of group-jacking deviations and better control the jacking precision and ground disturbance.
Field measurement on the interaction between socketed pipes during pipe-roof jacking in soft ground and corresponding surface settlement
He, Junzuo (author) / Liao, Shaoming (author) / Tan, Yong (author) / Liu, Mengbo (author)
2022-09-21
Article (Journal)
Electronic Resource
English
Sensitivity analysis of ground settlement induced by pipe-jacking construction in soft soil stratum
| DOAJ | 2019
Pipe-soil interaction during pipe jacking
| Online Contents | 1999
| Springer Verlag | 2025