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近年来,我们采用在线间设置活支点的方法,较好的解决了区间双线地段的架空难题,成功地顶进了1～12.0m箱形桥及桥高8.7m的箱形桥,下面以陇海线K6811-5.0×4.0箱涵顶进的实例,介绍我们的做法。 (一)线路慢行防护,搭设枕木垛 (二)在线间距中心顺线路方向铺设两路枕木,长度同架空长度。(见图2A处)。 (三)在枕木档间穿Ⅰ_(30)工字钢横梁并每根均与(二)设置的枕木间顶紧。 (四)设置纵梁。两侧各3片Ⅰ_(55)工字钢,两线间为5扣轨束吊梁,将Ⅰ_(30)工字钢联成整体,起分布力的作用。纵梁与横梁用角钢夹板及(?)22螺栓联结牢固。(见图1、图2)。 (五)顶进挖上,箱涵顶进。
In recent years, we have adopted the method of setting live fulcrums between lines to better solve the overhead problem of two-lane lots in the interval. Successfully, the 1 ~ 12.0m box-shaped bridge and the box-shaped bridge with a height of 8.7m are completed. Longhai line K6811-5.0 × 4.0 box culvert jacking example, introduce our approach. (A) slow line of protection, take the pillow (2) online spacing center along the line direction laying two sleepers, the length of the same overhead length. (See Figure 2A). (C) wear I_ (30) beam beams in the sleeper file and each with (b) set tight sleeper tight. (D) set up stringers. On each side of the three Ⅰ_ (55) I-beam, between the two lines for the five buckle beam beam beam, the I_ (30) I-beam integrated into the whole, from the distribution of the role. Longitudinal beams and beams with angle plywood and (?) 22 bolts firmly. (See Figure 1, Figure 2). (E) dug into the top of the box culvert.