Study on Bearing Capacity of Bored Cast-in-Situ Piles by Post Pressure Grouting

Author(s):  
Xudong Fu ◽  
Zhengbing Zhou
2019 ◽  
Vol 7 (7) ◽  
pp. 212
Author(s):  
Fang ◽  
Zhao ◽  
Tan ◽  
Qiu

Post-pressure grouting is an effective method to improve bearing capacity of ordinary bored cast-in-situ piles. The migration of the grout along the pile side is regarded as an important mechanism responsible for the improvement of the pile capacity. Research into the penetration height of the grout is of great important in evaluating the behavior of base grouted piles. In this paper, a prediction method of grouting penetration height along the shaft of the base grouted pile was proposed. Considering the balance and losses of the grout pressure during grouting, an iterative procedure was given to determine the penetration height of the grout in layered soils. Field test results were also provided to indicate the validity of the proposed method.


2010 ◽  
pp. 1115-1122
Author(s):  
Wenhua Gao ◽  
Jianqun Zhu ◽  
Ziyong Huang ◽  
Dong Liu
Keyword(s):  

Energies ◽  
2020 ◽  
Vol 13 (19) ◽  
pp. 5102
Author(s):  
Yu Hu ◽  
Jian Yang ◽  
Charalampos Baniotopoulos

Offshore wind energy is a rapidly maturing renewable energy technology that is poised to play an important role in future energy systems. The respective advances refer among others to the monopile foundation that is frequently used to support wind turbines in the marine environment. In the present research paper, the structural response of tall wind energy converters with various stiffening schemes is studied during the erection phase as the latter are manufactured in modules that are assembled in situ. Rings, vertical stiffeners, T-shaped stiffeners and orthogonal stiffeners are considered efficient stiffening schemes to strengthen the tower structures. The loading bearing capacity of offshore monopile wind turbine towers with the four types of stiffeners were modeled numerically by means of finite elements. Applying a nonlinear buckling analysis, the ultimate bearing capacity of wind turbine towers with four standard stiffening schemes were compared in order to obtain the optimum stiffening option.


2020 ◽  
Vol 310 ◽  
pp. 00023
Author(s):  
Pavel Kuklik ◽  
Martin Valek ◽  
Ivana Bozulic ◽  
Pratik Gajjar ◽  
Chandrashekhar Mahato ◽  
...  

The paper deals with the nonlinear computational modeling of the baroque enclosure masonry walls. The main tasks are input parameters for efficient advanced numerical tools and techniques, which are based on nonlinear and quasi brittle constitutive FEM modeling. For the work was used the knowledge and results from the Broumov Group Churches survey acquired in the frame of international SAHC university cooperation. The goal of the contribution are real bearing capacity parameters of the composite enclosure walls, which leads from standard homogenization techniques. With regards to the material micro modeling of different wall configuration in longitudinal and transversal direction was done with ATENA 2D software to evaluate the safe bearing capacity of the walls. The set of models aim to assess the bearing capacity of the enclosure wall, which is the main structural element in the church. In detail, we will present results from the numerical investigation, and partial in situ testing, from Vižňov, Ruprechtice and Otovice. Finally, we will present calculation of cracks propagation on full 3D church models. Concerning historical structures, it is one way how to validate the quality of estimations and validate numerical models.


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