Study on Wave Velocity Characteristics of Lignin-Modified Loess Site
Loess is a Quaternary sediment with special properties including seismic vulnerability and water sensitivity. It is prone to landslides, seismic subsidence, and liquefaction under earthquakes. As an environmentally friendly and economical material, lignin can effectively improve the seismic performa...
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| Main Authors: | , , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Wiley
2025-01-01
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| Series: | Shock and Vibration |
| Online Access: | http://dx.doi.org/10.1155/vib/7187456 |
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| Summary: | Loess is a Quaternary sediment with special properties including seismic vulnerability and water sensitivity. It is prone to landslides, seismic subsidence, and liquefaction under earthquakes. As an environmentally friendly and economical material, lignin can effectively improve the seismic performance of loess under appropriate dosage. However, the study of wave velocity characteristics in lignin-modified loess (LML) sites is still insufficient. Based on the laboratory test results of LML, this paper comprehensively uses the methods of field wave velocity test and regression analysis to study the wave velocity characteristics of lignin improvement loess sites and establishes the mathematical fitting formula between wave velocity and LML in different dosages with depth. The variation law of wave velocity versus lignin dosage of the sites under the influence of depth is analyzed, and the wave velocity characteristics of the sites under the influence of saturation state and lignin dosage are obtained. The results show that the variation of wave velocity of LML with the thickness of LML is highly consistent with the Power function model under each lignin dosage. The wave velocity of LML increases obviously with the increase of lignin dosage. When the lignin dosage is 1%, the wave velocity of unsaturated LML is the largest and then decreases slowly. When the lignin dosage is 3%, the wave velocity value of saturated LML is the largest and then decreases rapidly. The variation of wave velocity of LML versus the thickness of modified loess and lignin dosage conforms to the Poly surface relationship, and the increase of wave velocity is related to the more advantageous thickness of LML. |
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| ISSN: | 1875-9203 |