scholarly journals Effect of Steel Casing on Vertical Bearing Characteristics of Steel Tube-Reinforced Concrete Piles in Loess Area

2019 ◽  
Vol 9 (14) ◽  
pp. 2874 ◽  
Author(s):  
Zhongju Feng ◽  
Haibo Hu ◽  
Yunxiu Dong ◽  
Fuchun Wang ◽  
Minghui Jia ◽  
...  
Keyword(s):  
Reinforced Concrete ◽  
Steel Tube ◽  
Foundation Engineering ◽  
Loess Area ◽  
Concrete Piles ◽  
Concrete Pile ◽  
Tip Resistance ◽  
Reinforced Concrete Piles ◽  
Vertical Bearing ◽  
Centrifugal Model

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.

scholarly journals The Horizontal Bearing Capacity of Composite Concrete-Filled Steel Tube Piles

2020 ◽  
Vol 2020 ◽  
pp. 1-15
Author(s):  
Yunxiu Dong ◽  
Zhongju Feng ◽  
Haibo Hu ◽  
Jingbin He ◽  
Qilang Zhang ◽  
...  
Keyword(s):  
Bearing Capacity ◽  
Soil Compaction ◽  
Soil Mass ◽  
Steel Tube ◽  
Continuous Increase ◽  
Concrete Filled Steel Tube ◽  
Concrete Piles ◽  
Compaction Zone ◽  
Reinforced Concrete Piles ◽  
Centrifugal Model

Steel casings (SCs) are extensively and increasingly used to stabilize the borehole wall in the construction of bridge pile foundations. Steel casings (SCs), together with reinforced concrete piles (RCPs), form composite concrete-filled steel tube piles (CCFSTPs), which differ significantly from ordinary RCPs in horizontal bearing capacity. In this study, based on the characteristics of CCFSTPs, the horizontal bearing capacity of a CCFSTP was examined through a centrifugal model test with the length of the steel casing (LSC) and the modulus of the soil mass in the steel casing soil compaction zone (ESCSC_zone) as variables. Pile-side soil resistance, load-displacement curves, and pile moment curves were obtained for the CCFSTP. The results show that increasing LSC within a range of 12 cm significantly increases the ultimate horizontal bearing capacity of the CCFSTP, and further increasing LSC beyond 12 cm produces a continuous increase in the ultimate horizontal bearing capacity of the CCFSTP but only to an insignificant extent. In addition, increasing ESCSC_zone increases the ultimate horizontal bearing capacity of the CCFSTP, but to a relatively small extent. The results of this study provide a theoretical basis and technical support for the design and construction of CCFSTPs.

Field Test Study on Cutting Obstacle Piles Directly by Shield Cutters

2013 ◽  
Vol 353-356 ◽  
pp. 1433-1439
Author(s):  
Fei Wang ◽  
Da Jun Yuan ◽  
Rong Cai ◽  
Yong Jiang Mu ◽  
Meng Shu Wang
Keyword(s):  
Reinforced Concrete ◽  
Field Test ◽  
Social Benefits ◽  
Test Results ◽  
Concrete Piles ◽  
Test Study ◽  
Concrete Pile ◽  
Reinforced Concrete Piles ◽  
Cutting Effect ◽  
Configuration Scheme

Shield cutting obstacle pile directly has significant economic and social benefits compared to traditional methods, however, the corresponding cutting technology is far from mature currently in the international. Based on the construction need of cutting 14 bridge piles with the diameter of 1.0~1.2 meters by Suzhou subway shield, the preliminary scheme of cutter configuration was studied and proposed first, and then the worlds first field test of shield cutting reinforced concrete piles was carried out, the effect and rule of shield cutters cutting piles were analyzed, and the cutter configuration scheme was verified and optimized. The test results indicate that the shell cutter is fit for cutting reinforced concrete pile, its cutting effect on rebar and concrete is shear cutting; In order to make rebar shorter, we should make the rebar be cut off instead of pulled off as possible as we can. The main damage form of shell cutter is alloy cracked. Cutting side pile produces more damage on shell cutter than cutting central pile. The shell cutter configuration scheme should not only satisfy the whole cutting ability and covering the entire cutting plane, but also to be favorable to fix rebar by surrounding concrete.

The Application for Reinforced Concrete Piles of Marine Sedimentary Soft Soil Foundation Treatment

2013 ◽  
Vol 353-356 ◽  
pp. 411-414
Author(s):  
Yang Du ◽  
Tao Chen ◽  
Song Li
Keyword(s):  
Reinforced Concrete ◽  
Yellow River ◽  
Soft Soil ◽  
River Estuary ◽  
Concrete Piles ◽  
Foundation Treatment ◽  
Concrete Pile ◽  
Reinforced Concrete Piles ◽  
Soil Foundation ◽  
Soft Soil Foundation

Marine sedimentary soft soil is larger water content, higher compressibility, and lower strength and buried deep. The sluice project in the marine soft soil foundation construction is beneficial to the people's livelihood needs to conduct foundation treatment. Through the scheme comparison, the sluice wing wall is located in the Yellow River estuary uses reinforced concrete pile to treat foundation. The pile diameter is 0.5m, the pile length is 19m, and the pile end is located in the sand to meet the requirements of various conditions.

scholarly journals Analisis Numerik Perkerasan Sistem Pelat Terpaku Tiang Tunggal menggunakan Tiang Pipa Baja pada Tanah Lunak

2020 ◽  
Vol 25 (2) ◽  
pp. 171
Author(s):  
Anas Puri
Keyword(s):  
Reinforced Concrete ◽  
Soft Clay ◽  
Steel Pipe ◽  
Wheel Load ◽  
Pipe Pile ◽  
Concrete Piles ◽  
Concrete Pile ◽  
Reinforced Concrete Piles ◽  
Full Scale Tests ◽  
Steel Pipe Pile

All of the full-scale tests and numerical analysis of Nailed-slab System from previous researchers used massive reinforced concrete piles. This research will study the possibility of steel pipe pile as a replacement of massive reinforced concrete piles if there are available enough steel pipe piles. This research is aimed to study the behavior of single steel pipe pile Nailed-slab System on soft clay and the influence of pile length due to slab deflection and soil stresses. It was used the data from Puri (2015a) for a single massive reinforced concrete pile Nailed-slab. This massive reinforced concrete pile was replaced by a single steel pipe pile with similar and varied diameter which analyzed by the 2D finite element method. Results show that the steel pipe pile can be used as a “nail” at the Nailed-slab pavement system but by a larger dimension compared to the massive reinforced concrete pile. The maximum effective shear stress in soil did not reach undrained shear strength under a standard wheel load 40 kN. Generally, the soil was not failure.

Static and dynamic pile testing of reinforced concrete piles with structure integrated fibre optic strain sensors

2013 ◽  
Author(s):  
Constanze Schilder ◽  
Harald Kohlhoff ◽  
Detlef Hofmann ◽  
Frank Basedau ◽  
Wolfgang R. Habel ◽  
...  
Keyword(s):  
Reinforced Concrete ◽  
Strain Sensors ◽  
Fibre Optic ◽  
Concrete Piles ◽  
Reinforced Concrete Piles ◽  
Pile Testing

QUALITY MANAGEMENT IN THE PRODUCTION OF REINFORCED CONCRETE PRODUCTS FOR AGRICULTURAL FACILITIES

2020 ◽  
Author(s):  
E.A. Shlyakhova ◽  
◽  
I.A. Serebryanaya ◽  
A.V Serdyukova
Keyword(s):  
Reinforced Concrete ◽  
Quality Management ◽  
Business Process ◽  
Process Map ◽  
Concrete Piles ◽  
Reinforced Concrete Piles ◽  
Inputs And Outputs

The article provides an example of regulation of the main business process on the example of the process of "Production of reinforced concrete piles". A process map has been developed and the main inputs and outputs have been identified, and an example of drawing up a business process passport has been developed&

scholarly journals DYNAMIC ANALYSES OF BUILDING SUPPORTED BY REINFORCED CONCRETE PILES WITH GOOD DEFORMATION CAPACITY

2002 ◽  
Vol 67 (555) ◽  
pp. 107-114 ◽  
Author(s):  
Takuya NAGAE ◽  
Hitoshi UCHIMURA ◽  
Kouichi KOBAYASHI ◽  
Nozomu YOSHIDA ◽  
Shizuo HAYASHI
Keyword(s):  
Reinforced Concrete ◽  
Deformation Capacity ◽  
Concrete Piles ◽  
Dynamic Analyses ◽  
Reinforced Concrete Piles

Nonlinear finite elements modeling and experiments of FRP-reinforced concrete piles under shear loads

Structures ◽  
2020 ◽  
Vol 28 ◽  
pp. 106-119 ◽  
Author(s):  
Ahmed H. Ali ◽  
Ahmed Gouda ◽  
Hamdy M. Mohamed ◽  
Mohamed H. Rabie ◽  
Brahim Benmokrane
Keyword(s):  
Reinforced Concrete ◽  
Finite Elements ◽  
Concrete Piles ◽  
Finite Elements Modeling ◽  
Shear Loads ◽  
Nonlinear Finite Elements ◽  
Reinforced Concrete Piles ◽  
Modeling And Experiments
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