Active Settlement Control with Compensation Grouting—Results from a Case Study

Kummerer, Clemens; Schweiger, Helmut; Otterbein, Reiner

doi:10.1061/40663(2003)16

Cited by 3 publications

(1 citation statement)

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“…Wu [28] proposed that the combined pre-support technology of a pipe roof and grouting reinforcement can effectively consolidate the in situ stress and improve the bearing capacity of the soft rock surrounding the rock, which plays a significant role in controlling settlement. Kummerer [29] reported compensation grouting to be an active method that can be divided into two stages: adjusting the intermediate soil and actual grouting, which can offset the settlement caused by tunnel excavation. Focusing on the project of Shenyang Metro Line 9 Olympic East-Olympic Center interval underpassing the existing Olympic Center Station of Line 2, Huo [30] verified the superiority of the CRD method in underpass construction via numerical simulation and simultaneously suggested deep-hole grouting reinforcement and jack-up technologies for the effective control of the settlement of existing structural floors.…”

Section: Introductionmentioning

confidence: 99%

Relationship between the Intermediate Soil State and Settlement Control Measures during Tunnel Construction Undercrossing the Existing Station

Zhang

et al. 2023

Buildings

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Settlement control of existing stations has consistently been a key issue in tunnel construction. Intermediate soil has a significant influence on the settlement of the existing station as a connector between the new tunnel and the existing station which should be considered when selecting settlement control measures. To clarify the relationship between the state of the intermediate soil and the settlement and control measures of the existing station, this study investigated 49 new tunnel projects under existing stations and elucidated the relationship between the settlement and the settlement control measures of the existing station and the intermediate soil. The relationship between the failure of the intermediate soil and the settlement of the existing station was further analyzed by numerical simulation. Lastly, a simple mechanical model of intermediate soil failure was constructed to determine the stress state of the intermediate soil in constructing a tunnel under the existing station to guide the formulation of settlement control measures for the existing station. Hence, when the intermediate soil is completely destroyed, active control measures, such as jack or grouting lifting, should be implemented; when the intermediate soil is partially damaged, passive control measures should be undertaken. Thus, this study can provide a reference for settlement control of tunnels under existing stations.

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Section: Introductionmentioning

confidence: 99%

Relationship between the Intermediate Soil State and Settlement Control Measures during Tunnel Construction Undercrossing the Existing Station

Zhang

et al. 2023

Buildings

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Influence of the Ground Displacement and Deformation of Soil around a Tunnel Caused by Shield Backfilled Grouting during Construction

Liu

Song

Zhang³

et al. 2017

J. Perform. Constr. Facil.

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Time-Varying Analysis of Retaining Structures Enhanced with Soil Nails and Prestressed Anchors

et al. 2022

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At present, the research results for the stress response and deformation characteristics of composite support structures are mostly based on ideal or standard working conditions. External disturbances often exist in practical engineering, which makes the monitoring data deviate from the calculation results. In order to analyze the causes of deviation and correct them in practice, it is necessary to consider the time-varying effect and study the construction mechanics behaviors of composite support structures. Based on in situ test data, the effects of soil predisturbance, excessive excavation, unloading on the surface of edges, the tensioning and lagging of the anchor, and continuous rainfall on the stress-time curves of soil nails were analyzed. On the basis of verifying the effectiveness of the model, ABAQUS finite element software (v.2017) was used to simulate practical engineering based on ideal working conditions. Comparing the in situ test data and numerical simulation results, the development of mechanical response and deformation characteristics in the process of support structure installation and soil digging and filling were analyzed. Research shows that the time-varying effect has a significant impact on construction mechanics behaviors, especially on soil nailing combined with the use of prestressed anchors, due to layered excavation and support.

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Active Settlement Control with Compensation Grouting—Results from a Case Study

Cited by 3 publications

References 0 publications

Relationship between the Intermediate Soil State and Settlement Control Measures during Tunnel Construction Undercrossing the Existing Station

Relationship between the Intermediate Soil State and Settlement Control Measures during Tunnel Construction Undercrossing the Existing Station

Influence of the Ground Displacement and Deformation of Soil around a Tunnel Caused by Shield Backfilled Grouting during Construction

Time-Varying Analysis of Retaining Structures Enhanced with Soil Nails and Prestressed Anchors

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