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Construction technology of lime-soil compaction piles in bridgehead road section in collapsible loess area

A technology for lime-soil compaction piles and collapsible loess, which is applied in soil protection, infrastructure engineering, construction and other directions, and can solve problems such as technical difficulties in the construction of lime-soil compaction piles

Inactive Publication Date: 2018-11-13
HENAN UNIVERSITY OF TECHNOLOGY
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  • Abstract
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  • Application Information

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Problems solved by technology

Considering this situation, it is necessary to avoid or eliminate the large settlement of the foundation during subgrade treatment. The most effective and common way of subgrade treatment in collapsible loess areas is to use lime-soil compaction pile composite foundation, but currently in this case There are great difficulties and deficiencies in the construction technology of lime-soil compaction piles

Method used

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  • Construction technology of lime-soil compaction piles in bridgehead road section in collapsible loess area
  • Construction technology of lime-soil compaction piles in bridgehead road section in collapsible loess area

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Embodiment Construction

[0018] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0019] 【Example】

[0020] The foundation treatment measures of lime-soil compaction piles (1) are adopted for the bridge head section with high filling height, settlement that does not meet the requirements, and soil collapsibility, plum blossom-shaped layout, and lime-soil compaction piles (1). The pile diameter is 300mm, and the pile spacing is general The pile length is 0.9~1.1m, the pile length is 10m and 13m, and the treatment length is 3 times the height of the bridgehead subgrade filling + 20m transition section (11). Determine the construction technical parameters of the lime-soil compaction pile (1) according to the design requirements: 1. pile diameter D ;Pile length(9) h ;2. Lime-soil ratio: 3:7 (volume ratio); 3. Spacing: 0.9m and 1.1m, arranged in plum blossom shape; 4. Hole forming and compaction are all done by machinery; 5. Material re...

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Abstract

A construction technology of lime-soil compaction piles in a bridgehead road section in a collapsible loess area comprises the main steps of site formation, calibration of compaction pile hole positions and check points, drilling construction, mixing and backfilling, pile foundation compaction and punning and pile-forming acceptance check. By means of the construction technology, convenience and reliability of construction of the lime-soil compaction piles in the collapsible loess area can be effectively guaranteed, the bearing capacity of a foundation in the area is effectively improved, andthen damage caused by foundation collapsibility caused by high roadbed filling is avoided or eliminated.

Description

technical field [0001] The invention relates to a construction technology of lime-soil compaction piles in bridgehead road sections in collapsible loess areas, in particular to the construction technology of lime-soil compaction piles in bridgehead road sections with high filling height and unsatisfactory settlement. Background technique [0002] The natural foundation formed by collapsible loess belongs to soft soil foundation, which is characterized by collapsibility and large uneven settlement under certain pressure and soaking conditions. If there is uneven settlement in the bridgehead section, it will cause the phenomenon of "jumping at the bridgehead", which will cause traffic inconvenience. [0003] In the bridgehead section in the collapsible loess area, the high filling height of the road will generate greater pressure on the subgrade. Considering this situation, it is necessary to avoid or eliminate the large settlement of the foundation during subgrade treatment....

Claims

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Application Information

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IPC IPC(8): E02D3/08
CPCE02D3/08
Inventor 徐志军郭兆翔刘婷婷韩星原方刘军张冉冉张健程远浩杜乾刘海林姜学佳庞照昆
Owner HENAN UNIVERSITY OF TECHNOLOGY
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