Study on the anti-floating water level of the underground structure's comprehensive anti-floating

Kong, Dezhi; Guan, Youhai; Yuan, Hua

doi:10.1016/j.istruc.2023.104921

Cited by 5 publications

(3 citation statements)

References 13 publications

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“…In actual engineering construction, high‐rise structures such as power towers, TV towers, and so forth, will bear a sizeable upward pull force under the action of wind load or earthquake. Meanwhile, the large anti‐floating basement, 1 offshore dock platform, 2 suspension /cable‐stayed bridges, 3 and static load test piles 4 are all facing uplift requirements. Suppose these building structures do not consider the uplift performance of the foundation or take improper uplift measures.…”

Section: Introductionmentioning

confidence: 99%

Uplift behavior of nodular diaphragm wall: Experiment and theory

Wu,

Zhang,

et al. 2024

Num Anal Meth Geomechanics

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The nodular diaphragm wall (NDW) is a novel foundation that can provide significant uplift load resistance compared to a typical diaphragm wall foundation. With the advantages of low noise, cost‐effectiveness, high work efficiency, and construction abilities close to existing buildings, NDW has excellent engineering application prospects in urbanization construction. However, the scarce knowledge on the uplift resistance, failure mode, and calculation method of the NDW has hindered its application in practice. In this paper, indoor model tests based on particle image velocimetry (PIV) technology are carried out to investigate the uplift behavior of three NDW models with different amounts and locations of nodular parts. The load transfer mechanisms of the three NDW models are discussed in detail, and special attention is given to the failure mode analysis. In addition, a theoretical analysis is implemented based on the load transfer approach. The transfer function and associated critical parameters are discussed in detail. Accordingly, an iterative procedure is proposed to interpret the load transfer information of an uplift NDW in multilayered soils under different loading levels. The findings derived in this paper are helpful to the uplift deformation, capacity calculation, and design of NDW in practical engineering.

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Section: Introductionmentioning

confidence: 99%

Uplift behavior of nodular diaphragm wall: Experiment and theory

Wu,

Zhang,

et al. 2024

Num Anal Meth Geomechanics

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“…The buoyancy of an underground structure in a weakly permeable or impermeable foundation is usually below the calculated value, however, which is referred to as “buoyancy reduction”. The extent of this reduction can be expressed as a buoyancy reduction coefficient [ [6] , [7] , [8] , [9] ]. Designers typically apply the highest anti-floating water level to determine the buoyancy load on an underground structure, thereby overestimating buoyancy resistance.…”

Section: Introductionmentioning

confidence: 99%

Buoyancy of underground structures and pore water pressure conduction law in silty clay strata

Guo,

Zhou,

Sun

et al. 2024

Heliyon

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“…At present, the anti-floating design methods of basements mainly include "passive" [11][12][13] and "active" [14][15][16][17][18][19][20][21] anti-floating methods. The "passive" anti-floating measures pertain to conventional anti-floating technologies, including the self-weight Buildings 2023, 13, 2772 2 of 16 anti-floating method, the anti-floating anchor rod, and the anti-floating pile.…”

Section: Introductionmentioning

confidence: 99%

Numerical Simulation Study of Basement Water Discharge Pressure Relief Method under Rainstorm Conditions

Chen,

Wang,

2023

Buildings

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The development and expansion of underground space has led to a continuous increase in both the occupied area and the burial depth of underground basements. Meanwhile, due to the inaccurate estimation of groundwater buoyancy, more and more anti-floating problems of underground basement caused by rainstorm have emerged. Combined with the principles of unsaturated seepage theory, this article uses Flac3d 6.0 software to conduct simulations on the influence of various significant factors on the effect of the water discharge pressure relief method, a novel approach to reduce buoyancy. The numerical results show that the water discharge pressure relief method can ensure the stability of the basement under rainstorm conditions compared with the basement without drainage holes. In order to improve the anti-floating efficiency of the water discharge pressure relief method in preventing floating, it is recommended to initially decrease the height and spacing of the drainage holes and follow by increasing the aperture of the drainage holes. The recommended spacing of the drainage holes is between 2 m and 3 m. The height of the drainage holes should be between 1 m and 1.5 m, and the aperture of the drainage holes should be no smaller than 100 mm. Furthermore, the water head of the basement floor is proportional to the permeability of the lower backfill and cushion, and it is not significantly influenced by the upper backfill soil when its permeability is within a low range. Finally, in order to achieve a satisfactory anti-floating effect, it can be attempted to reduce the longitudinal width of the lower backfill soil or moderately increase the thickness of the cushion.

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Study on the anti-floating water level of the underground structure's comprehensive anti-floating

Cited by 5 publications

References 13 publications

Uplift behavior of nodular diaphragm wall: Experiment and theory

Uplift behavior of nodular diaphragm wall: Experiment and theory

Buoyancy of underground structures and pore water pressure conduction law in silty clay strata

Numerical Simulation Study of Basement Water Discharge Pressure Relief Method under Rainstorm Conditions

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