non-penetrating soil part. Replacement driving can be set between pile and
hammer to improve the anti-impact performance of pile hammer. From the
strain distribution, it can be seen that the strain is the same everywhere in the
pile body, which indicates that the deformation intensity of each part is the
same. The displacement of the whole pile can be divided into two parts. One is
the overall decline caused by impact, the other is the deformation caused by
stress, which is different according to different stress. During piling, the displacement field distribution shows that the displacement from pile top to pile
bottom decreases gradually.
(3) In the process of hydraulic hammer piling, the maximum displacement and
stress of soil occur around the pile body, including the pile side and the pile
bottom, while the maximum shear force and strain occur around the pile body.
The soil around the pile is compressed and deformed by the penetration
process of the pile, and the soil on the surface is uplifted upward, which has
obvious soil compaction effect. No matter the displacement, stress, shear force
or strain are in accordance with the distribution law, that is, the maximum
deformation appears around the pile body, and gradually diffuses outward with
the maximum area as the core. The farther away from the pile, the smaller the
deformation value is.
The comparison between the theoretical calculation results and the field application shows that the proposed theory and analysis method can well explain the pile
penetration process and the changing trend of soil parameters. According to the
above research results, the phenomena of pile collapse and pile breakage in pile
driving construction can be predicted, prevented and evaluated, which can provide
technical support for pile foundation construction.
Bibliography
1. Yin Y-B, Luo J-Y, Zhou G-P, Guo C-X (2007) Development of a powder injection pile
drawing device with quadrant combination steel pipe. Build mach (10):71–74
2. Yin Y-B, Yu L, Zhang H Hydraulic pneumatic pilehammer:201020676102.2[P], 3 Aug 2011
3. Yin Y, Hu X, Li Y, Others (2010) Mathematical modeling and analysis on
hydraulic-pneumatic-compound hammers. Chin J Constr Mach 8(4):379–384
4. Yin Y-B, Huang J-Q, Wang H-Q, Shen Y-C, Guo C-X (2011) Pile—soil contact analysis via
hydraulic hammering process. Chin J Constr Mach 8(4):67–71
5. Yin Y-B, Huang J-Q, Xiong W, et al (2012) Modeling and analysis of hydraulic pile. hammer
system. In: Proceedings of the 2011 international conference on advances in construction
machinery and vehicle engineering, Chinese Construction Machinery Society, Shanghai
Scientific &Technical Publishers, pp 90–94
6. Yin Y-B, Huang J-Q, Zhang X-Q, Guo C-X, Shen Y-C (2012) Analysis of
hydraulic-pneumatic hammer working process. Build Mach (4):67–71
7. Yin Y-B, Huang J-Q, Hu X-H, Guo C-X (2012) A compare of several typical foreign
hydraulic system of hydraulic hammers. Build Mach (2):10–13
8. Yin Y-B, Liang Z, Huang S, Guo C-X (2012) Analysis of fast dropping process of
hydraulic-pneumatic hammer. Fluid Power Transm Control (2):10–13
320
12 Pneumatic–Hydraulic Pile Driving Hammer
hammer to improve the anti-impact performance of pile hammer. From the
strain distribution, it can be seen that the strain is the same everywhere in the
pile body, which indicates that the deformation intensity of each part is the
same. The displacement of the whole pile can be divided into two parts. One is
the overall decline caused by impact, the other is the deformation caused by
stress, which is different according to different stress. During piling, the displacement field distribution shows that the displacement from pile top to pile
bottom decreases gradually.
(3) In the process of hydraulic hammer piling, the maximum displacement and
stress of soil occur around the pile body, including the pile side and the pile
bottom, while the maximum shear force and strain occur around the pile body.
The soil around the pile is compressed and deformed by the penetration
process of the pile, and the soil on the surface is uplifted upward, which has
obvious soil compaction effect. No matter the displacement, stress, shear force
or strain are in accordance with the distribution law, that is, the maximum
deformation appears around the pile body, and gradually diffuses outward with
the maximum area as the core. The farther away from the pile, the smaller the
deformation value is.
The comparison between the theoretical calculation results and the field application shows that the proposed theory and analysis method can well explain the pile
penetration process and the changing trend of soil parameters. According to the
above research results, the phenomena of pile collapse and pile breakage in pile
driving construction can be predicted, prevented and evaluated, which can provide
technical support for pile foundation construction.
Bibliography
1. Yin Y-B, Luo J-Y, Zhou G-P, Guo C-X (2007) Development of a powder injection pile
drawing device with quadrant combination steel pipe. Build mach (10):71–74
2. Yin Y-B, Yu L, Zhang H Hydraulic pneumatic pilehammer:201020676102.2[P], 3 Aug 2011
3. Yin Y, Hu X, Li Y, Others (2010) Mathematical modeling and analysis on
hydraulic-pneumatic-compound hammers. Chin J Constr Mach 8(4):379–384
4. Yin Y-B, Huang J-Q, Wang H-Q, Shen Y-C, Guo C-X (2011) Pile—soil contact analysis via
hydraulic hammering process. Chin J Constr Mach 8(4):67–71
5. Yin Y-B, Huang J-Q, Xiong W, et al (2012) Modeling and analysis of hydraulic pile. hammer
system. In: Proceedings of the 2011 international conference on advances in construction
machinery and vehicle engineering, Chinese Construction Machinery Society, Shanghai
Scientific &Technical Publishers, pp 90–94
6. Yin Y-B, Huang J-Q, Zhang X-Q, Guo C-X, Shen Y-C (2012) Analysis of
hydraulic-pneumatic hammer working process. Build Mach (4):67–71
7. Yin Y-B, Huang J-Q, Hu X-H, Guo C-X (2012) A compare of several typical foreign
hydraulic system of hydraulic hammers. Build Mach (2):10–13
8. Yin Y-B, Liang Z, Huang S, Guo C-X (2012) Analysis of fast dropping process of
hydraulic-pneumatic hammer. Fluid Power Transm Control (2):10–13
320
12 Pneumatic–Hydraulic Pile Driving Hammer