Study on deformation of layered rock tunnel based on material point method

• Autorzy: Pang Jingjie , Xing Zhenhua , Li Yang , Xia Binwei , Wan Gexin , Wang Shusen , Fu Kang

Identyfikatory

DOI

10.24425/ace.2025.153321

• Języki publikacji: EN

Abstrakty

EN

The stability problems of layered rock mass are frequently encountered in tunnel and underground engineering. Affected by bedding plane, the mechanical properties of surrounding rock show obvious anisotropy, which makes its failure characteristics more complicated. Therefore, it is essential to clarify the deformation and damage characteristics of the tunnel in layered rock for the safe and efficient development. In this study, a numerical simulation tool based on material point method and strain softening model is used to establish the plane strain model of tunnel in layered rock, and the deformation process of the tunnel with different dip angles and different rock thickness is studied. The results show that: 1) Compared with the physical simulation test, it is proved that the tool used can simulate the complex process of tunnel deformation and instability, and effectively realize delamination, shear slip and rock fracture in the failure process of tunnel in layered rock; 2) The bedding plane has a significant influence on the failure characteristics of surrounding rock, and the damaged area increases significantly on the bedding plane, cracks are always concentrated in the direction perpendicular to the bedding plane, and the smaller the thickness of the rock layer, the larger the damage area of the surrounding rock; 3) With the increase of joint angle, the number of failure points presents a U-shaped trend, and the decrease of rock thickness will lead to an increase in the number of failure points and a decrease in the percentage of shear failure points.

Słowa kluczowe

EN

fracture field; layered rock mass; material point method; stability; surrounding rock; tunnel

PL

pole spękań; masa skalna warstwowa; metoda punktowa materiału; stabilność; skała otaczająca; tunel

• Wydawca: Komitet Inżynierii Lądowej i Wodnej PAN ; Politechnika Warszawska, Wydział Inżynierii Lądowej
• Czasopismo: Archives of Civil Engineering
• Rocznik: 2025
• Tom: Vol. 71, nr 1
• Strony: 65--81
• Opis fizyczny: Bibliogr. 24 poz., il., tab.

Twórcy

autor

Pang Jingjie

• State Key Laboratory of Coal Mine Disaster Dynamics and Control, Chongqing University, Chongqing, China

• https://orcid.org/0009-0001-2884-3777

autor

Xing Zhenhua

• China Construction Third Engineering Bureau Group Co., Ltd, Wuhan, Hubei Province, China

• https://orcid.org/0009-0002-3137-6353

autor

Li Yang

• Chongqing Expressway Group Co., Ltd, Chongqing, China

• https://orcid.org/0009-0001-6313-9312

autor

Xia Binwei

• State Key Laboratory of Coal Mine Disaster Dynamics and Control, Chongqing University, Chongqing, China

• https://orcid.org/0000-0002-8928-0461

autor

Wan Gexin

• Chongqing Expressway Group Co., Ltd, Chongqing, China

• https://orcid.org/0009-0006-9643-2941

autor

Wang Shusen

• China State Construction Railway Investment & Engineering Group Co., Ltd.
• China Construction Third Engineering Bureau Group Co., Ltd, Beijing, China

• https://orcid.org/0009-0002-3925-3016

autor

Fu Kang

• China State Construction Railway Investment & Engineering Group Co., Ltd.
• China Construction Third Engineering Bureau Group Co., Ltd, Beijing, China

• https://orcid.org/0009-0000-9002-3190

Bibliografia

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