The Application of Various Deep Mixing Methods for Excavation Support Systems

Andromalos, Kenneth B.; Bahner, Eric W.

doi:10.1061/40663(2003)25

Cited by 12 publications

(3 citation statements)

References 1 publication

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“…As a commonly used method for strengthening and treating foundations, it has the advantages of good integrity, constructability, and economy [1][2][3] . In recent years, methods of using cement-soil to improve the engineering properties of soft clays, such as cement-soil mixing piles [4] , retaining walls [5] , deep cement mixing (DCM) piles, and walls [6] have been developed. Notably, the DCM method can reduce total settlement, differential settlement, and increase slope stability; thus, it is widely utilised in areas with a thick soft clay layer.…”

Section: Introductionmentioning

confidence: 99%

Model Tests and 3D Simulations of Deep Cement Mixing Wall Reinforced with Prestressed Steel Tubular Truss

Chen,

Wang,

Shi

et al. 2024

Preprint

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Steel trusses have desirable bending performance; accordingly, a new type of stiffen deep cement mixing (SDCM) wall，namely deep cement mixing wall (DCM) reinforced with a prestressed steel tubular truss, is proposed in this paper. Its performance is studied via model tests and 3D finite element simulations of cement–soil composite beams. The deformation, stiffness, and crack distribution characteristics of different cement–soil composite beams are compared and analysed, and the stiffness contribution of the steel truss and cement–soil to the composite beams is elucidated. According to the test results, the ultimate deflection of the cement–soil composite beam reinforced with prestressed steel tubular truss is reduced by approximately 25% compared with a cement–soil composite beam reinforced with an ordinary steel tubular truss, and it is reduced by approximately 29% compared with the prestressed steel tubular truss. The results show that the steel truss bears approximately 70% of the load, whereas the cement–soil bears the remaining 30% of the load. Prestressing can effectively delay the development of cracks in cement–soil composite beams, thus greatly improving the overall stiffness and support capacity of composite beams. Analysing the loading process of composite beams via the finite element model revealed that the bearing characteristics of steel trusses are largely uniform: in the cement–soil composite beam or steel truss alone. Accordingly, along with the results of the numerical simulation analysis, it is proved that the steel truss is critical to improving the flexural capacity of composite beams, and the load sharing ratio of the prestressed steel truss is higher than that of an ordinary steel truss. The prestressed steel truss reinforced composite beams have better flexural performance than an I-beam.

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Section: Introductionmentioning

confidence: 99%

Model Tests and 3D Simulations of Deep Cement Mixing Wall Reinforced with Prestressed Steel Tubular Truss

Chen,

Wang,

Shi

et al. 2024

Preprint

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“…Deep mixing has been used as reinforced retaining structures [1][2][3][4][5], but one relatively new application is to install columns on the passive side in an interaction with sheet pile walls. Columns are installed in rows or blocks inside the sheet pile wall and thereby increase the passive resistance and after excavation act as a ground improvement of the excavation bottom and foundation of the construction.…”

Section: Introductionmentioning

confidence: 99%

Two- and three-dimensional analyses of excavation support with rows of dry deep mixing columns

Ignat¹,

Baker

Larsson³

et al. 2015

Computers and Geotechnics

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“…A great number of experimental studies dealing with the effects of binder type and ratio on deep mixing method are available in the literature. Some of these studies focused on water/cement-lime (w/c) ratio [13][14][15][16][17][18][19][20][21][22][23][24][25][26][27][28][29][30][31] and others dealt with curing period [32,33]. Most of the researchers pointed out that the unconfined compressive strength (UCS) increased when the w/c ratio and curing time were increased.…”

Section: Introductionmentioning

confidence: 99%