A simplified prediction method for evaluating tunnel displacement induced by laterally adjacent excavations

Zheng, Gang; Yang, Xinyu; Zhou, Haizuo; Du, Yunfei; Sun, Jiayu; Yu, Xiaozhou

doi:10.1016/j.compgeo.2017.10.006

Cited by 115 publications

(18 citation statements)

References 41 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Many analysis methods for excavation-induced internal force and deformation in a subway tunnel have been proposed, which can be classified into the numerical analysis method [16][17][18][19], field monitoring method [20][21][22][23], and theoretical analysis method [24][25][26]. The numerical analysis method can simulate the complex process of excavation and is therefore a favored choice for engineers and researchers.…”

Section: Introductionmentioning

confidence: 99%

Predicting Response of Constructed Tunnel to Adjacent Excavation with Dewatering

et al. 2021

View full text Add to dashboard Cite

This paper proposes a new method for predicting the displacement and internal force of constructed tunnels induced by adjacent excavation with dewatering. In this method, the total excavation-induced additional stress on the constructed tunnel is derived by superposing the additional stresses induced by excavation unloading and dewatering effects. The additional stress induced by unloading effect is calculated using Mindlin’s solution. The additional stress induced by dewatering effect is calculated using the principle of effective stress and the Dupuit precipitation funnel curve. With the beam on elastic foundation method, the total additional stress is then used for calculating the tunnel displacement and internal force caused by adjacent excavation with dewatering. Based on three well-documented case histories, the performance of the proposed method is verified. Moreover, a parametric analysis is also performed to capture the effects of excavation depth, tunnel-to-excavation distance, initial water level, excavation plan view size, and specific yield on the responses of the constructed tunnels. The results indicate that the effect of excavation depth on the tunnel maximum vertical displacement, maximum bending moment, and maximum shear force is more significant at an excavation depth greater than the cover depth of the constructed tunnel. The tunnel maximum vertical displacement, maximum bending moment, and maximum shear force decrease nonlinearly with an increase in the tunnel-to-excavation distance and the initial water level. Among the investigated parameters, the excavation dimension in the tunnel longitudinal direction affects most the tunnel responses. The effect of specific yield on the tunnel displacement and internal force induced by adjacent excavation with dewatering becomes more obvious as increasing the initial water level and excavation depth.

show abstract

Section: Introductionmentioning

confidence: 99%

Predicting Response of Constructed Tunnel to Adjacent Excavation with Dewatering

et al. 2021

View full text Add to dashboard Cite

show abstract

“…ese geological models are built based on survey data, and many of the strata are simplified, making them relatively simple [19,20]. Moreover, when the structural model needs to be considered, most of the calculation add simplified structural units as needed.…”

Section: D Geological Modelmentioning

confidence: 99%

Development of Data Integration and Sharing for Geotechnical Engineering Information Modeling Based on IFC

Chen

et al. 2021

Advances in Civil Engineering

View full text Add to dashboard Cite

With the rapid development of infrastructure construction, geotechnical engineering has always been worthy of attention due to its complexity and diversity. Accelerating the informatization of geotechnical engineering will contribute to the project management, but the information contained in geotechnical engineering cannot be well integrated because of the lack of unified data standards. Building Information Modeling (BIM) has been considered as an effective technology to manage information, and Industry Foundation Classes (IFC) in BIM serves as a neutral and open standard for the exchange of information. However, it was found that BIM cannot express the information of some structure objects and geological objects well during the construction process of geotechnical engineering. Combined with the characteristics of geotechnical engineering, taking advantage of the good extensibility of IFC, this paper proposes a “Built-In Generation Schema” for geotechnical structure models and a “Plug-In Extension Schema” for three-dimensional (3D) geological models, ultimately forming the basic data system of geotechnical engineering information models based on IFC. Applying extended IFC to the modeling process, the BIM-based modeling method of geotechnical models is proposed. In addition, an IFC-based platform is developed to integrate geological models and structure models for further displaying and analyzing of geotechnical engineering models. The work in this paper provides a feasible way and technical support for promoting the integration and sharing of geotechnical engineering information and enhancing the multiprofessional collaborative work.

show abstract

“…We are only interested in the forces acting on the retaining structures that arise due to excavation (rather than those induced by the installation process). Therefore, the installation of the retaining structures was modeled using a 'wished-in-place' method [23][24][25]. We also note that the analyses were conducted in drained conditions using effective stress and so we did not take into account the effect of the curtain.…”

Section: Structure Model and Input Propertiesmentioning

confidence: 99%

Preliminary Numerical Analysis of a Novel Retaining System in Dry Sandy Soil and Its First Application to a Deep Excavation in Wuhan (China)

et al. 2020

View full text Add to dashboard Cite

A new form of retaining system for use in deep excavations in crowded cities is proposed in this paper. The new system, which we have coined the herringbone retaining system (HRS) involves the use of vertical and batter piles, capping beams, and wales. A numerical study was conducted (using the finite difference tool FLAC3D) to investigate various aspects of the behavior of the new system and reveal the mechanisms responsible for it. The HRS method was compared subsequently to two other commonly-used systems: the cantilever retaining structure (CRS) and horizontal-strutted retaining structure (HSRS). The results show that using the HRS method significantly reduces the deformation of the vertical piles and bending moments acting on them. More specifically, the maximum values of the deformation and bending moment were calculated to be 4.5% and 23.1% of the corresponding CRS values, respectively (the corresponding figures calculated for the HSRS method are 5.3% and 19.7%, respectively), so the HRS and HSRS methods provide similar levels of support. Finally, a real-world application of the system was presented to provide a valuable reference for the future use of HRS.

show abstract

A simplified prediction method for evaluating tunnel displacement induced by laterally adjacent excavations

Cited by 115 publications

References 41 publications

Predicting Response of Constructed Tunnel to Adjacent Excavation with Dewatering

Predicting Response of Constructed Tunnel to Adjacent Excavation with Dewatering

Development of Data Integration and Sharing for Geotechnical Engineering Information Modeling Based on IFC

Preliminary Numerical Analysis of a Novel Retaining System in Dry Sandy Soil and Its First Application to a Deep Excavation in Wuhan (China)

Contact Info

Product

Resources

About