Analysis of braced excavations with coupled finite element formulations

Finno, Richard J.; Harahap, Indra Sati Hamonangan; Sabatini, Paul J.

doi:10.1016/0266-352x(91)90001-v

Cited by 38 publications

(15 citation statements)

References 16 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Numerous experimental and measured data show that there is no simple linear relationship between the width coefficient of the formation settlement trough and the tunnel depth of the stratum. e deformation of the overlying soil caused by tunnel excavation in different soil layers is different [21,22]. For clay layers with high cohesion, the disturbed soil is "pot" (see Figure 1) rather than inverted triangle shape.…”

Section: Peck Formula and The Width Of The Settlement Troughmentioning

confidence: 99%

“…At present, there are many methods for predicting surface settlement caused by urban subway tunnel construction, such as the empirical formula method [6][7][8], elastic strain method [9][10][11][12][13], air stress function method [14][15][16][17][18], stochastic medium theory [19][20][21], numerical simulation method [22,23], and centrifugal test method [24,25]. Although there are many methods for predicting surface settlement, the calculation of the influence radius of formation settlement is still mainly based on empirical formula data regression [26][27][28][29], and the settlement trough width is not theoretically determined.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

A Theoretical Calculation Method of Influence Radius of Settlement Based on the Slices Method in Tunnel Construction

Tian

Song

Wang

et al. 2020

Mathematical Problems in Engineering

View full text Add to dashboard Cite

At present, the empirical formula is used to calculate the influence radius of surface settlement and the width of settlement trough, which lacks theoretical support. Aiming at this problem, this paper derived the theoretical calculation formula for predicting the influence radius of formation settlement based on the slices method. Then, the expression of the width of settlement trough was obtained according to the relationship between the settlement influence radius and the settlement trough width. The rationality of the formula was verified by the Heathrow Express tunnel and the Green Park tunnel. Through analysis and discussion, it was found that in the clay stratum, the settlement calculation formula can more accurately predict the surface settlement, while there is a big error in predicting the stratum settlement within 4d near the tunnel vault. In the sand layer, the internal friction angle is less than 40°, and the reinforcement surface is applied to the unsupported face to reduce the radius of influence; in the clay formation, when the cohesion is less than 50 kPa, the influence radius can be reduced by applying reinforcement measure to the unsupported face.

show abstract

Section: Peck Formula and The Width Of The Settlement Troughmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

A Theoretical Calculation Method of Influence Radius of Settlement Based on the Slices Method in Tunnel Construction

Tian

Song

Wang

et al. 2020

Mathematical Problems in Engineering

View full text Add to dashboard Cite

show abstract

“…As a result of the consolidation, the main features that determine the performance of the retaining structure are affected, such as, the ground and wall displacements, earth pressures and structural stresses (Finno et al 1991;Ou et al 1998).…”

Section: Introductionmentioning

confidence: 99%

Analysis of A Braced Excavation In Soft Soils Considering The Consolidation Effect

2007

View full text Add to dashboard Cite

The studies of excavations in soft clayey soils are normally based on undrained total stress analyses. A better approach consists of taking into account the effects of consolidation during the excavation-bracing process and after the completion of the construction by means of coupled finite element analyses in effective stresses. In this paper, the geotechnical behaviour of a braced excavation in the soft soils of San Francisco (USA) is analysed, both during and after the construction period. Numerical analyses are performed with a finite element program, which incorporates the Biot consolidation theory (coupled formulation of the water flow and equilibrium equations) and soil constitutive relations simulated by the p-q-h critical state model. Numerical results are compared with field results.

show abstract

“…Out of all these values the maximum value of each of the above design parameters has been compared under both static and seismic conditions. Numerical methods have been used for analysis of braced excavation under static condition ( [1], [2], [3], [4], [5], [6]). The optimum values of the design parameters i.e.…”

Section: Introductionmentioning

confidence: 99%

Stability of Earth Retention System in Dry Cohesionless Soil Under Static and Seismic Condition

Chowdhury¹,

Deb²,

Sengupta³

2014

Proceedings of the 4th International Conference on Computational Methods in Structural Dynamics and Earthquake Engineering (COM

View full text Add to dashboard Cite

show abstract

Analysis of braced excavations with coupled finite element formulations

Cited by 38 publications

References 16 publications

A Theoretical Calculation Method of Influence Radius of Settlement Based on the Slices Method in Tunnel Construction

A Theoretical Calculation Method of Influence Radius of Settlement Based on the Slices Method in Tunnel Construction

Analysis of A Braced Excavation In Soft Soils Considering The Consolidation Effect

Stability of Earth Retention System in Dry Cohesionless Soil Under Static and Seismic Condition

Contact Info

Product

Resources

About