土建外文翻译---城市地下铁道连拱隧道群施工技术研究-公路隧道(编辑修改稿)

土建外文翻译---城市地下铁道连拱隧道群施工技术研究-公路隧道(编辑修改稿)内容摘要：

r mon procedures ranging from crossarch tunnel numerical simulation, using stratigraphic structural model of the structure of the tunnel by the force and deformation analysis (Figure 1, Fi gure 2, Figure 3). The scope of the horizontal direction taken by force along the direction of the tunnel crosssection to crosshole 3 times the limit, taking the top of the vertical direction to the surface, the bottomhole span to 3 times the limit, unit model uses the DP formation of elasticplastic material entity, the tunnel Lining with elastic beam element simulation, beam elements and solid elements used to connect coupling equation. Through the analysis of data in Table 2 we can see that during the construction of large tunnels in a greater impact on small tunnel, if a small section of the tunnel with the necessary strengthening of measures and control the removal of temporary support to the longitudinal spacing, the program is useful and feasible to The. 5 Construction of key technologies and corresponding measures Arch tunnel construction segment is required on a strict construction organization and strong technical assurance measures carried out under the good job in organizing the construction of steps to prepare the construction of a variety of technical preventive measures are key to success. pairs of pull anchor and strengthen the bolt Abolition of a single type of wall, the excavation is plete in the wall thickness of , pull anchor and strengthen the right bolt set is very necessary. Φ22 steel bolt used on the pull bolt drug volume, pitch, , the length of the wall thickness according to the ~ . Strengthen the bolt in the wall located at the invert and side walls at both sides, using of Φ25 hollow grouting anchor, spacing . in the body wall, grouting rock block folders In the wall of rock thinnest Department to , after repeated blasting excavation process, the impact of the rock wall around the loose, their bearing capacity affected. Therefore, we must separate the wall in the vault, wall, invert Department for loose rock for grouting. Φ42 embedded steel, cement slurry to take water glass pairs of liquid slurry, the parameter of 1:1 cement and 30 ~ 45Be sodium silicate solution, grouting pressure of ~ . In both excavation grouting in the wall were carried out, after the pletion of the final excavation carried out in saturated sandwich wall grouting. millisecond blasting technology microseisms Tunnel excavation construction method used in all drilling and blasting. Because the lot is located in downtown Guangzhou, the groundintensive buildings, and the Tunnel 0 spacing excavation, blasting must be set aside in accordance with glossy layer of smooth microseismic millisecond blasting program construction blasting vibration control will be allowed within the . For the doublearch tunnel in which strata of Ⅲ , Ⅳ grade rock blasting to take measures as follows: (1) The blasting equipment, using lowspeed emulsion explosive shock. (2) strict control of footage per cycle ( ~ ), around the borehole spacing of , reduce the loading dose to control the smooth blasting effect (Figure 4). (3) The use of multiple detonators per blast detonation, using nonelectric millisecond detonator initiation work asymmetric microvibration technology. (4), excavation and construction of the wall at the second to take first reserve 1m smooth layer, Cutting away from the eyes arranged in the side of the wall on the second floor reserved for smooth blasting around the eyes more than surface layout of the empty eyes, a small charge. Put an end to ultradigging, digging, when partially due to artificial air pick excavation. Through the above effective measures, in the wall during the construction of the second blast, right in the thick wall of basic did not cause damage to the smooth passage of the doublearch tunnel 0 from the excavation. Auxiliary scissors to strengthen supporting By ANSYS simulation analysis, in order to ensure that small section of tunnel construction safety, the need for auxiliary support of small section tunnel reinforcement to resist the impact of blasting and rock produced by the instantaneous release of excavation loads generated by bias.。