外文資料翻譯---柔弱巖石上短距離隧道的動(dòng)態(tài)施工力學(xué)的研究-公路隧道(參考版)
2025-05-17 04:46本頁(yè)面
【正文】 CHEN Jia. (2020). Structure design and analysis of hallowembeddding longspaan neighbourhood highway tunnnel, highway, 12, 217222. Figure 1. The Finite Element Analyssis Model Table 1. Baasic mechanicaal parameters oof surroundingg rock and tunnnel structures Figure 2. The Graph of Surface Subbsidence 120 th th Moderrn Applied Sciience Vool. 4, No. 6。 ? Surrrounding Rockk 410 21 29 Reiinforced Rockk 460 21 32 Priimary Support 28000 23 — — — Senncondly Liningg 31000 25 — — — g, mic sh Modern Appliied Science tunnel in freewway. Jouranal of Eailway Enngineering Socciety, 2, 6368. YAN Qixiang HE Chuan, amp。 WANG Jianhua. (2020). Excavation method analysis of little distance 119 E /MPa 169。 HE Manchao. (1996). Surrounding rock stability under plicated condition and rock dynamic construction mechanics. Beijing: Science Press. LIU Yanqing, HAN Shihang, LU Rusui, amp。 Sun Jun. (1997). Numerical analysis of large nonlinear deformation mechanism for plex 10 tunnel lining in inpentent countryrock. Rock and Soil Mechanics, 4, 327336. JIN Fengnian, amp。 HE Chuan. (2020). 3D elastoplastic numerical simulation of surrounding rock displacement in soft surrounding rock sectionduring construction process. Chinese Journal of Rock Mechanics and Engineering, 3, 623629. SUN Jun, amp。, the bination between the layers of rock is general, and the level of rock is grade V. The groundwater is poor, and the main form of the water in tunnel is damp or dripping. The saturated uniaxial pressive strength of mudstone Rc=, Integrity factor Kv=, K1=, K2=, K3=0, [BQ]=219. The saturated uniaxial pressive strength of Sandstone Rc=, integrity factor Kv=, K1=, K2=, K3=0, [BQ]=319. The surface of geological structure is very developed, the rock body is extremely fragmented, and the block strength is not strong. So it belongs to the typical category of the soft and weak rocks. Engineering Construction Method The double sidewalls construction method is guided under the supporting role with advanced small pipe, in order to reduce the influence of tunnel construction on the highway operations, ensure the safety of tunnel construction. The outside radius of advanced small pipe is Φ42mm, the length is and the circumferential spacing is 40cm. In the construction process, the excavation length is controlled strictly, the primary support is constructed every 4m, and the 30cm thick closed loop of steel concrete is molded between the secondly lining and primary support. The bolts are the forms of hollow grouting and quincunx layout, the diameter and length are setted as 25mm and , the vertical and circumferential spacing are located 200cm and 80cm apart. The primary support and secondly lining are forms of the 28cm thick C20 shotcrete and 60cm thick C25 model reinforced concrete. 3. NumericalModel The tunnel length in simulating model is selected as 20m, and the model has 21850 elements, in which bolts have 3850 elements(). The tunnel surrounding rock is considered to be elastoplastic material. Because the mechanics characteristic of the support structure is better than the surrounding rock, so it could be regarded as elastic material. The effect of steel arch shelf in shotcrete and advanced small pipe could be simulated using equivalent method. is the basic mechanics parameter of the material. In order to ensure the veracity of calculation, the model dimension can be set as : left and right are all 50m, vertical to earth surface, down is 8 50m. 4 Results Analysis Surface Subsidence Analysis The surface subsidence should be strictly controlled, in order to ensure the safety of highway operations in the tunnel construction. From , the graph of the surface subsidence after pletion of t
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