Research on Stability of Loess Roadbed Reinforced with Cement-soil Mixing Piles
[1]DENG Yousheng,MENG Liqing,CAI Mengzhen,et al.Research on Stability of Loess Roadbed Reinforced with Cement-soil Mixing Piles[J].Journal of Zhengzhou University (Engineering Science),2022,43(03):59-66.[doi:10.13705/j.issn.1671-6833.2022.03.009]
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Journal of Zhengzhou University (Engineering Science)[ISSN
1671-6833/CN
41-1339/T] Volume:
43
Number of periods:
2022 03
Page number:
59-66
Column:
Public date:
2022-04-10
- Title:
- Research on Stability of Loess Roadbed Reinforced with Cement-soil Mixing Piles
- Keywords:
- rainfall infiltration; loess; cement-soil; roadbeds reinforcement; ABAQUS
- CLC:
- TU44
- DOI:
- 10.13705/j.issn.1671-6833.2022.03.009
- Abstract:
- Aiming to solve the problem of the stability of roadbed in the condition of rainfall infiltration in loess area, cement-soil mixing pile was adopted as the foundation reinforcement treatment method.Based on the foundation geotechnical test of loess and the unconfined compressive strength test results of cement soil modified with different amounts of fly ash and coal gangue, according to the M-C criterion and the load-settlement principle of roadbed in rainfall infiltration conditions, the roadbed model treated with cement soil mixing pile in rainfall infiltration was constructed by using the finite element analysis software ABAQUS.Combined with the numerical simulation results, the load settlement variation law of loess roadbed reinforced with cement-soil mixing piles with different rainfall duration, rainfall intensity and pile elastic modulus was analyzed; the bearing characteristics of loess roadbed were discussed; and the influence of rainfall infiltration on the stability of loess roadbed was explored.The research results showed that the cement-soil mixing pile had a significant strengthening effect on the vertical direction of the loess roadbed in the condition of rainfall infiltration, and the displacement of the roadbed slope foot could increase with the increase of rainfall intensity and rainfall duration.In the condition that the rainfall intensity was 2 mm/h and the rainfall duration was 18 h, the road pavement settlement decreased with the increase of pile elastic modulus.When the elastic modulus of the pile was 300 MPa, the cement-soil mixing pile had the best reinforcement effect on the loess roadbed.
- References:
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Last Update:
2022-05-02