Hybrid Bored Prestressed Concrete Cased Piles: Equipment and Construction Procedures

Chen, Hang; Hu, Hesong; Tang, Mengxiong; Yang, Xiaosong; Zhu, Jianxin

doi:10.1061/(asce)co.1943-7862.0001578

Cited by 5 publications

(1 citation statement)

References 13 publications

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“…Drilling with pre-stressed concrete pile cased pile (hereafter referred to as DPC pile) is a new type of energy-saving, environmentally friendly, and non-soil-squeezing pre-stressed high-strength concrete (PHC) pipe pile foundation with large diameters ranging from 800 to 1,400 mm (Yang, 2018;Tang et al, 2020;Hou et al, 2021Hou et al, , 2022a. Engineering practice shows that the DPC pipe is a kind of the friction end-bearing pile, and the bearing capacity of the DPC pile with a diameter of 1.0 m is usually more than 20,000 kN (Chen et al, 2018;Liu et al, 2021;Hou et al, 2022a,b). The bearing capacity of the DPC pile is higher by 33.42 and 23.16%, respectively, than bored piles and hammered pipe piles with the same pile diameter.…”

Section: Introductionmentioning

confidence: 99%

Experimental research on the flow law of the grouting fluid in an annular gap between a non-soil-squeezing PHC pipe pile wall and a hole wall

Hou

Ze-jun

et al. 2023

Front. Ecol. Evol.

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The bearing capacity of drilling with pre-stressed concrete pile cased pile (hereafter referred to as DPC pile) is closely related to the grouting effect on an annular gap between a pre-stressed high-strength concrete (PHC) pipe pile wall and a hole wall (hereafter referred to as the an annular pile–soil gap). A physical grouting model testing system for the DPC pile based on a high-precision three-dimensional (3D) scanner and a multi-functional grouting box has been independently developed. In this method, 3D geometric size and spatial point information of the grouting stone have been quantitatively characterized. The influences of the water–cement ratio, grouting pressure, collapsed holes, and falling sand have been studied. The conclusions are obtained as follows: (1) a quantitative characterization method of the 3D geometric dimensions of the grouting stone based on a 3D scan is accurate and reliable and can overcome the shortcomings of traditional manual measurement. (2) In the same horizontal plane, grouting body thickness gradually decreases as its horizontal distance from the grouting outlet increases, and the higher the elevation, the greater the rate of decrease; conversely, the lower the elevation, the slower the rate of decrease. When the horizontal distance from the pulp outlet is equal, slurry thickness gradually decreases as the height increases. (3) For the grouting liquid with a water–cement ratio of 0.5, grouting pressure should not be less than 0.6 MPa. (4) When the falling sand is not far above the grouting outlet, a grouting root system can be formed, whose grout veins, complexity, and grout coverage area can be optimally improved by changing the fluidity of the grout and grouting pressure. When the falling sand is on the side of the grouting outlet or the surface of the grouting outlet but far away from the grouting outlet, it is easy to be avoided by the grout, which can greatly reduce the grouting effect.

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Section: Introductionmentioning

confidence: 99%

Experimental research on the flow law of the grouting fluid in an annular gap between a non-soil-squeezing PHC pipe pile wall and a hole wall

Hou

Ze-jun

et al. 2023

Front. Ecol. Evol.

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Numerical Modeling of Grout Injection for Hybrid Bored Prestressed Concrete Cased Piles

Prabhu

Chen

et al. 2021

Advances in Urban Geotechnical Engineering

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Field tests on bearing characteristics of DPC pipe piles including effects of end sealing and side grouting

Tang

et al. 2023

Acta Geotech.

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Hybrid Bored Prestressed Concrete Cased Piles: Equipment and Construction Procedures

Cited by 5 publications

References 13 publications

Experimental research on the flow law of the grouting fluid in an annular gap between a non-soil-squeezing PHC pipe pile wall and a hole wall

Experimental research on the flow law of the grouting fluid in an annular gap between a non-soil-squeezing PHC pipe pile wall and a hole wall

Numerical Modeling of Grout Injection for Hybrid Bored Prestressed Concrete Cased Piles

Field tests on bearing characteristics of DPC pipe piles including effects of end sealing and side grouting

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