Application of the Dynamic Compaction Method for Ground Improvement of Collapsible Loess in Qinhai

Jun CAI; Jingtao ZHANG; Guangyin DU; Han XIA

doi:https://doi.org/10.18400/tekderg.571877

Makale detayları

Application of the Dynamic Compaction Method for Ground Improvement of Collapsible Loess in Qinhai

Yazarlar:

Jun CAI | Jingtao ZHANG | Guangyin DU | Han XIA

Yayıncı:

TMMOB İnşaat Mühendisleri Odası

Ana Başlıklar:

İnşaat mühendisliği

Dergi:

Teknik Dergi 2022 Vol.33 Issue 1, pp.11455-11472

Belge Tipi:

Makale

Yayın Tarihi:

12/2021

Belge Dili:

İngilizce

Document ID (Org No.):

2000648282

Sıklık:

İki Aylık

pISSN:

1300-3453

DOI:

https://doi.org/10.18400/tekderg.571877

Özet:

 


The collapsibility of loess has a great influence on subgrade construction in Qinghai, China, so laboratory tests are utilized to evaluate the collapsibility influencing factors, which illustrates that the collapsibility of this region is not dominated by soluble salts but an alkaline environment, high porosity and a low water content. The in situ self-weight submerging test reveals the settlement regularities, with a maximum settlement of 22.4 cm, which suggests that the soil in the test region is self-weight collapsible loess. In consideration of the economy and applicability, dynamic compaction was chosen as the ground improvement method. The optimal number of drops (N) for an energy level of 1000 kN·m is 6, and for the energy levels of 1500 kN·m and 2000 kN·m, N is 8. Besides the maximum effective depth for 1000 kN·m is 5 – 6 m, and it is 6 – 7 m for 1500 kN·m and 2000 kN·m.

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The collapsibility of loess has a great influence on subgrade construction in Qinghai, China, so laboratory tests are utilized to evaluate the collapsibility influencing factors, which illustrates that the collapsibility of this region is not dominated by soluble salts but an alkaline environment, high porosity and a low water content. The in situ self-weight submerging test reveals the settlement regularities, with a maximum settlement of 22.4 cm, which suggests that the soil in the test region is self-weight collapsible loess. In consideration of the economy and applicability, dynamic compaction was chosen as the ground improvement method. The optimal number of drops (N) for an energy level of 1000 kN·m is 6, and for the energy levels of 1500 kN·m and 2000 kN·m, N is 8. Besides the maximum effective depth for 1000 kN·m is 5 – 6 m, and it is 6 – 7 m for 1500 kN·m and 2000 kN·m.

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Makale detayları

Application of the Dynamic Compaction Method for Ground Improvement of Collapsible Loess in Qinhai

Yazarlar: Jun CAI | Jingtao ZHANG | Guangyin DU | Han XIA

Yayıncı: TMMOB İnşaat Mühendisleri Odası

Ana Başlıklar: İnşaat mühendisliği

Dergi: Teknik Dergi 2022 Vol.33 Issue 1, pp.11455-11472

Belge Tipi: Makale

Yayın Tarihi: 12/2021

Belge Dili: İngilizce

Document ID (Org No.): 2000648282

Sıklık: İki Aylık

pISSN: 1300-3453

DOI: https://doi.org/10.18400/tekderg.571877

Sayı

Yazarlar:

Jun CAI | Jingtao ZHANG | Guangyin DU | Han XIA

Yayıncı:

TMMOB İnşaat Mühendisleri Odası

Ana Başlıklar:

İnşaat mühendisliği

Dergi:

Teknik Dergi 2022 Vol.33 Issue 1, pp.11455-11472

Belge Tipi:

Makale

Yayın Tarihi:

12/2021

Belge Dili:

İngilizce

Document ID (Org No.):

2000648282

Sıklık:

İki Aylık

pISSN:

1300-3453

DOI:

https://doi.org/10.18400/tekderg.571877