Abstract
This study aims at investigating the effect of steel casing on vertical bearing characteristics of steel tube-reinforced concrete piles in loess area by centrifugal model test. Five piles were selected, one of them was a conventional reinforced concrete pile which was 35 cm in length and 2.5 cm in diameter as a contrast pile, and the length of steel casing for the remaining four steel tube-reinforced concrete piles was 8 cm, 12 cm, 16 cm, and 20 cm respectively. The results show that the axial force, unit skin friction, tip resistance, and shaft resistance of steel tube-reinforced concrete piles with different steel casing lengths were different from conventional reinforced concrete pile. Additionally, the ultimate bearing capacity of steel tube-reinforced concrete piles was compared with a conventional reinforced concrete pile. Moreover, advantages of steel casing in pile foundation engineering were summarized. The results of this study can provide reference for vertical bearing characteristics of steel tube-reinforced concrete piles in loess area.
Highlights
In recent years, with the rapid development of bridge engineering, pile foundation has attracted the attention of designers as an important part of highway bridge construction [1,2,3,4]
The results of centrifugal model test and the actual results show only proportional transformation; The results ofand centrifugal model analysis test and thebearing actualcharacteristics results showwill only proportional the law is consistent, so the following of the be directly using transformation; the law is consistent, and so the following analysis of the bearing characteristics will the results of centrifugal model test
Because the ultimate bearing capacity is the most important be directlyinusing the results of centrifugal model test. itBecause the ultimate bearing capacity is the parameter the practical application of pile foundation, is converted to the ultimate bearing capacity most important parameter in the practical application of pile foundation, it is converted to the of the prototype pile, and the lifting value of the steel casing to the ultimate bearing capacity is reflected ultimate bearing capacity prototype pile, and the lifting value of the steel casing to the ultimate by the truck whose qualityof is the kg
Summary
With the rapid development of bridge engineering, pile foundation has attracted the attention of designers as an important part of highway bridge construction [1,2,3,4]. Some researchers established theoretical models to analyze the bearing characteristics of piles [5,6,7,8]. Some researchers studied the bearing characteristics of piles through field or indoor experiments [9,10,11,12]. Some researchers studied the bearing characteristics of piles through simulation experiments [13,14,15]. In the process of pile foundation construction, various types of soil will be encountered. China introduced the conception of the “New Silk Road Economic
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