Impact of Lateral Pressure Coefficient and Parameters of Backfilling Material on DS-TBM Jamming Control
[1]Winson,Jia Shuyao,Gao Xingpu.Impact of Lateral Pressure Coefficient and Parameters of Backfilling Material on DS-TBM Jamming Control[J].Journal of Zhengzhou University (Engineering Science),2020,41(02):91-96.[doi:10.13705/j.issn.1671-6833.2019.03.013]
Copy
Journal of Zhengzhou University (Engineering Science)[ISSN
1671-6833/CN
41-1339/T] Volume:
41
Number of periods:
2020 02
Page number:
91-96
Column:
Public date:
2020-05-31
- Title:
- Impact of Lateral Pressure Coefficient and Parameters of Backfilling Material on DS-TBM Jamming Control
- Keywords:
- Double shield TBM; card machine control; side pressure coefficient; Modulus of elasticity of the backfill material; soft fill length
- CLC:
- -
- DOI:
- 10.13705/j.issn.1671-6833.2019.03.013
- Abstract:
- In order to study the effects of lateral pressure coefficient λ, elastic modulus E of backfill material, and soft filling length Lr on the jamming control of double-shield TBM in deep squeeze formation, the interaction model between TBM and surrounding rock was established by using 3DEC. In the numerical calculation, the improved Burgers (CVISC) viscoelastic-plastic creep constitutive was used to simulate the dynamic step-by-step excavation of the TBM. The results showed that: (1) The larger the λ, the more unfavorable the TBM jamming control: when λ≤1 When λ≥1.2, the degree of influence is small; when 1<λ≤1.2, the degree of influence gradually increases; when λ≥1.2, the total resistance of the TBM rises sharply, which is extremely unfavorable to the control of the jamming machine; (2) The larger the backfill material E, the smaller the total contact pressure and total resistance of the TBM, which is more beneficial to the control of TBM jamming; (3) The larger L r is , the greater the total resistance of the TBM is, and the greater the probability of TBM jamming is; , in order to reduce the probability of jamming, the length of the soft filling stage should be shortened as much as possible.
- References:
- -
- Similar References:
Memo
-
Last Update:
2020-05-30