Application Study of Long-Short-Piled Raft Foundation

Abstract

The long-short-piled raft foundation is an unusual type of building base. This kind of foundation is usually applied for pile foundation reinforcement of existing buildings when shortage of bearing capacity of piles occurs. The bearing capacity of pile foundation is improved and less settlement is expected. Since this method has so many obvious advantages, it is recommended in the reinforcement design of piled raft foundation of an existing building in Tianjin. Longer reinforced concrete bored piles are adopted as the supplementary ones. The bearing capacity of this kind of piled raft foundation was studied. The settlement was also analyzed with the National standard method together with the finite element numerical method. According to the study, the bearing capacity of piled raft foundation is enhanced effectively after adding piles. Also, the results show that the total settlement and differential settlement during the construction is in control respectively.

Parametric Investigations into the Analysis of Piled Raft for Multi-Storeyed Building

“…Sometimes the difficulties are reduced to an axi-symmetric or a plane-strain problem in order to simplify the computing work. Several researchers [12][13][14][15][16][17][18][19][20][21][22][23][24][25][26][27][28][29] made noteworthy contributions using this method. While some researchers studied circular piled rafts, others reported on the effectiveness of piled-raft foundations in case of multi storyed buildings.…”

Analysis of the piled raft for three load patterns: A parametric study

“…In order to reduce the computational efforts, the problems are sometimes simplified to an axi-symmetric problem or a plane-strain problem. Some of the noteworthy contributions using this method include those by Hooper (1973), Madhav and Karmarkar (1982), Kakurai et al (1991), Wiesner (1991), Gandhi and Maharaj (1996), Smith and Wang (1998), Franke et al (2000), Katzenbach et al (2000), Reul and Randolph (2003), Maharaj and Gandhi (2004), Poulos et al (2006), Thoiba Singh, N. and Balweshwar Singh (2008), Noh et al (2008), Cheng (2011), Xie et al (2012) and Sawant et al (2012). Some of the researchers analyzed the circular piled rafts while few of them, reported the performance of piled raft foundation for a muti-storeyed building.…”