Comprehensive compacting method for highfill embankment in loess area

Abstract

The invention relates to the technical field of geotechnical engineering construction, and in particular to a comprehensive compacting method for highfill embankment in a loess area. The method comprises the following steps: (1) clearing the surface of a soil foundation for 30cm and overbreaking for 2m, after overbreaking, compacting the foundation by using a heavy hammer, and processing a lower layer foundation, wherein the effective processing depth is no less than 1m; (2) paving 6% ash soil of 1m in thickness along the compacted soil foundation, and compacting; (3) after paving the ash soil, filling plain soil layer to layer, and compacting, wherein the filling thickness of each layer is not greater than 300mm, and a vibratory roller of 18t tons is adopted for compacting through rolling in a waling speed of 4km / h, and the compact coefficient is not less than 96%; (4) compacting to reinforce once by using the heavy hammer when every 3m of the plain soil is filled; and (5) refilling the plain soil till 1m below a roadbed, refilling 6% ash soil within 1m below the roadbed, and compacting. As the comprehensive compacting method for highfill embankment in the loess area is combined with a heavy hammer rammering construction process on the basis of a conventional vibratory roller compact process, a pre-compaction sinking period is shortened.

Description

technical field [0001] The invention relates to the technical field of geotechnical engineering construction, in particular to a comprehensive compaction method for high-fill embankments in loess areas. Background technique [0002] Traditional high-fill embankment treatment methods generally use vibratory and impact rollers to pave soil in layers and roll in layers. This type of method requires embankments to go through a long period of pre-compression settlement after construction (usually 6 to 12 months) The pavement can only be paved within a short period of time, which obviously cannot meet the requirements of the construction period in road projects with tight construction period requirements. Furthermore, these traditional high-fill treatment technologies are not ideal when dealing with ultra-high loess fill bodies, and some effective processes cannot meet the design requirements during use or are limited by site factors. Contents of the invention [0003] In o...

AI Technical Summary

Problems solved by technology

[0002] Traditional high-fill embankment treatment methods generally use vibratory and impact rollers to pave soil in layers and roll in layers. This type of method requires the embankment to go through a long period of pre-compression settlement after construction (usually 6 to 12 months) Road paving can only be carried out within the specified period, which obviously cannot meet the requirements of the construction period in road projects with tight construction period requirements

Furthermore, these traditional high-fill treatment technologies are not ideal when dealing with ultra-high loess fill bodies, and some effective processes cannot meet the design requirements during use or are limited by site factors.

Images