Active and passive instability teaching demonstrator of shield excavation face
A kind of excavation surface, active and passive technology, applied in the field of teaching demonstration instrument, can solve problems such as students' difficulty in understanding, and achieve the effect of rich demonstration content, meeting the needs of classroom teaching, and simple structure
Active Publication Date: 2014-05-21
ZHEJIANG UNIV
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Problems solved by technology
In the lecture, data analysis and pictures are generally used to explain the soil damage of the excavation surface generated in the construction of the shield method. It is difficult for students to understand. A demonstration method for the active and passive instability process of the excavation surface in the construction of the shield method is developed. Teaching equipment is very necessary
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Embodiment Construction
[0020] The present invention will be further described below in conjunction with drawings and embodiments.
[0021] like figure 1 Shown, the present invention is by the front panel 27 of plexiglass, all the other are the model case that the left side plate 3, right side plate 7, base plate 12 and back plate 28 of metal plate constitute opening; The shortest upper shield body 4, middle shield body 5 and the section of the longest lower shield body 11 are hollow semi-cylindrical bodies of the same diameter, and the plane parts of the three shield bodies are fixed from top to bottom on the inner surface of the plexiglass plate 27 of the model box, and the three shield bodies The axes are all parallel to the bottom plate 12.
[0022] like figure 1 As shown, the upper shield body 4, the middle shield body 5 and the lower shield body 11 have the same structure, but the lengths of the three major axes are different, and some of the upper shield body 4, the middle shield body 5 and ...
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The invention discloses an active and passive instability teaching demonstrator of a shield excavation face. An opened model box is formed by a front panel made of organic glass, three shield body sections are hollow semi-cylinders with same diameter, plane parts of the three shield bodies are sequentially parallel to a bottom plate from top to bottom and are clung to the inner side face of an organic glass plate of the model box, pressure bearing baffle plates, barrels and mobile brackets are sequentially coaxially arranged in the hollow semi-cylindrical surfaces of the right sides of the three shield bodies; lead screws on one ends of three step-shaped long shafts respectively penetrate through respective mobile brackets to be threaded with the barrels, left sides of the three shield bodies are abutted with a left side plate, the other ends of the three step-shaped long shafts penetrate through the left side plate, a metal substrate, gear inner gear baffle gaskets, gears and gear outer gear baffle gaskets to be threaded with nuts on respective shaft ends; and the three gears are fixed on respective shafts by using respective location screws. According to the active and passive instability teaching demonstrator, the deformation and damage process of soil bodies before the pressure bearing baffle plates under three depths can be demonstrated, and the damage condition of the soil bodies can be statically observed under any displacement. The active and passive instability teaching demonstrator can meet the classroom teaching demand.
Description
technical field [0001] The invention relates to a teaching demonstration instrument, in particular to a teaching demonstration instrument for active and passive instability of a shield excavation face. Background technique [0002] The shield method is a relatively advanced roof culvert construction method. On the basis of retaining the traditional roof culvert construction and roadside prefabrication technology of bridge and culvert structures, a major reform has been carried out on the structure jacking support method. It is used as shield support for underground excavation, and the advancement of underground excavation reduces the impact of construction on ground activities, and is widely used in underground tunnel and culvert construction. [0003] The shield tunneling method construction is carried out by using a shield machine. The shield machine is a machine with a metal shell, the whole machine and auxiliary equipment are installed in the shell, and the excavation o...
Claims
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IPC IPC(8): G09B25/02
Inventor 孔令刚陈仁朋姚罡王顺玉陈云敏韩连兵李君
Owner ZHEJIANG UNIV