A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Control method for preventing long-term settlement of metro shield tunnel
The invention discloses a control method for preventing long-term settlement of a metro shield tunnel. During construction in a shield tunnel, the bottom of a duct piece is drilled by using a diggingmethod through relative rotation of an outer sleeve and a spiral drill pipe in the outer sleeve, when the spiral drill pipe is driven to spirally drill by one power head, the outer sleeve is driven tosettle by the other power head and synchronously follows to descend together with the spiral drill pipe, the outer sleeve is ejected into soil below the duct piece in sections in the shield tunnel byusing a hydraulic jacking station or jacking type pile-sinking or pressing type pile-sinking equipment, and soil within a pile pressing range is continuously discharged to the shield tunnel throughrotary drilling of the spiral drill pipe in the outer sleeve, so that the synchronous settlement of the outer sleeve and the spiral drill pipe is realized. The control method has the beneficial effects that the load of the metro tunnel during operation is transferred to the soil with high bearing capacity through a formed pile body, so that the long-term settlement of the metro tunnel during operation is reduced and prevented, the construction and operation are simple and during operation, the equipment is less, and the construction cost is low.
本发明公开了一种防止地铁盾构隧道长期沉降的控制方法，在盾构隧道内施工，在管片底部通过中掘工法将外套管与外套管内部的螺旋钻杆的相对旋转进行钻孔，在一个动力头带动螺旋钻杆进行螺旋钻进的同时，另一个动力头带动外套管下沉，与螺旋钻杆同步跟进下行，在盾构隧道内部利用液压顶进工作站或顶压式沉桩或抱压式沉桩设备将外套管一节一节顶入管片下方土体中，通过外套筒内部的螺旋钻杆的回转钻进将压桩范围内的土体源源不断的排到盾构隧道中来，从而实现外套管和螺旋钻杆的同步下沉。有益效果：将运营期地铁隧道的荷载通过形成的桩体传递到承载力较高的土层，从而减少和防止运营地铁隧道的长期沉降。施工操作简便、设备少、施工成本低。
Control method for preventing long-term settlement of metro shield tunnel
The invention discloses a control method for preventing long-term settlement of a metro shield tunnel. During construction in a shield tunnel, the bottom of a duct piece is drilled by using a diggingmethod through relative rotation of an outer sleeve and a spiral drill pipe in the outer sleeve, when the spiral drill pipe is driven to spirally drill by one power head, the outer sleeve is driven tosettle by the other power head and synchronously follows to descend together with the spiral drill pipe, the outer sleeve is ejected into soil below the duct piece in sections in the shield tunnel byusing a hydraulic jacking station or jacking type pile-sinking or pressing type pile-sinking equipment, and soil within a pile pressing range is continuously discharged to the shield tunnel throughrotary drilling of the spiral drill pipe in the outer sleeve, so that the synchronous settlement of the outer sleeve and the spiral drill pipe is realized. The control method has the beneficial effects that the load of the metro tunnel during operation is transferred to the soil with high bearing capacity through a formed pile body, so that the long-term settlement of the metro tunnel during operation is reduced and prevented, the construction and operation are simple and during operation, the equipment is less, and the construction cost is low.
本发明公开了一种防止地铁盾构隧道长期沉降的控制方法，在盾构隧道内施工，在管片底部通过中掘工法将外套管与外套管内部的螺旋钻杆的相对旋转进行钻孔，在一个动力头带动螺旋钻杆进行螺旋钻进的同时，另一个动力头带动外套管下沉，与螺旋钻杆同步跟进下行，在盾构隧道内部利用液压顶进工作站或顶压式沉桩或抱压式沉桩设备将外套管一节一节顶入管片下方土体中，通过外套筒内部的螺旋钻杆的回转钻进将压桩范围内的土体源源不断的排到盾构隧道中来，从而实现外套管和螺旋钻杆的同步下沉。有益效果：将运营期地铁隧道的荷载通过形成的桩体传递到承载力较高的土层，从而减少和防止运营地铁隧道的长期沉降。施工操作简便、设备少、施工成本低。
Control method for preventing long-term settlement of metro shield tunnel
一种防止地铁盾构隧道长期沉降的控制方法
HU JUN (author) / LIU YONG (author) / CHANG LIYONG (author) / WANG RUI (author)
2020-06-16
Patent
Electronic Resource
Chinese
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