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Analysis of Shrinkage Effect in Static Pressure Densification Piles and a Novel Fill-tamp Integrated Device
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Liang GUO1, Fangchao LEI1, Fei PEI2, Chuanzhao XU1, Kai XING1
Science Technology and Industry | 2025, 25(15) : 101 - 105
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Science Technology and Industry | 2025, 25(15): 101-105
• Technology Innovation •
Analysis of Shrinkage Effect in Static Pressure Densification Piles and a Novel Fill-tamp Integrated Device
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Liang GUO1, Fangchao LEI1, Fei PEI2, Chuanzhao XU1, Kai XING1
Affiliations
  • 1 China JIKAN Research Institute of Engineering Investigations and Design Co., Ltd., Xi'an 710043, China
  • 2 School of Civil Engineering, Xi'an Traffic Engineering Institute, Xi'an 710300, China
Published: 2025-08-10
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Static pressure densification piles exhibit significant technical and economic advantages in addressing the collapsibility of loess. However, during construction, there is a widespread issue of severe shrinkage after static pressure hole formation. To address this, specialized field tests were conducted using the volume conversion method to compare and analyze the shrinkage conditions of static pressure densification piles after the first and fourth hole formations. It is found that shrinkage occurred to varying degrees after both hole formations, with the overall shrinkage rate after the fourth hole formation reaching as high as 26.54%, an increase of 101.40% compared to the first hole formation. To effectively tackle this challenge and ensure the quality of pile construction, the importance of the tamping and filling process stands out. Given the limitations of traditional heavy hammer tamping methods in terms of construction efficiency, quality control, and environmental protection, an innovative fill-tamp integrated device has been developed. This device not only improves the quality and efficiency of densification pile construction but also advances tamping and filling technology, achieving dual improvements in economic and social benefits, and it has value for promotion and application.

static pressure densification pile  /  shrinkage effect  /  heavy hammer compaction  /  fill-tamp integrated device
Liang GUO, Fangchao LEI, Fei PEI, Chuanzhao XU, Kai XING. Analysis of Shrinkage Effect in Static Pressure Densification Piles and a Novel Fill-tamp Integrated Device[J]. Science Technology and Industry, 2025 , 25 (15) : 101 -105 .
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Year 2025 volume 25 Issue 15
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Article Info
  • Receive Date：2025-02-10
  • Online Date：2025-09-18
  • Published：2025-08-10
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  • Received：2025-02-10
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    1 China JIKAN Research Institute of Engineering Investigations and Design Co., Ltd., Xi'an 710043, China
    2 School of Civil Engineering, Xi'an Traffic Engineering Institute, Xi'an 710300, China
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表12种不同金属材料的力学参数
科
Family		 属数
Number of
genus		 种数
Number of
species		 占总种数比例
Percentage of
total species (%)		 属
Genus		 种数
Number of
species		 占总种数比例
Percentage of total
species (%)
鹅膏菌科Amanitaceae 2 11 5.26 鹅膏菌属 Amanita 10 4.78
小菇科 Mycenaceae 2 12 5.74 丝盖伞属 Inocybe 5 2.39
多孔菌科 Polyporaceae 8 14 6.70 蜡蘑属 Laccaria 5 2.39
红菇科 Russulaceae 3 23 11.00 小皮伞属 Marasmius 6 2.87
小菇属 Mycena 11 5.26
光柄菇属 Pluteus 5 2.39
红菇属 Russula 17 8.13
栓菌属 Trametes 5 2.39
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