Dragline type steel grating lagging jack and construction method thereof
A steel grid and cable-type technology, which is applied in earthwork drilling, wellbore lining, tunnel lining, etc., to achieve the effects of improving rigidity, improving bending resistance, and quick connection
Active Publication Date: 2018-01-19
SHANDONG UNIV OF SCI & TECH
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Problems solved by technology
Solve the initial support problems of subway tunnels, mine roadways, etc. through the steel grid arch frame
Method used
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[0024] Such as figure 1 The shown cable-type steel grid arch is composed of arc-shaped steel grid sub-section 1, vertical steel grid sub-section 2, steel strand cable ring 3 and sub-section connection structure 4, the arc Both the shaped steel grid subsection 1 and the vertical steel grid subsection 2 are composed of two internal main reinforcements 5 and two external main reinforcements 5, the four main reinforcements 5 are connected by stirrups 6, and the internal and external main reinforcements 5 are connected by reinforcing ribs 7 ; arc-shaped steel grid sub-section 1 and vertical steel grid sub-section 2 are surrounded by a number of steel strand cable rings 3 and sub-section connection structures 4, and are close to the steel grid arch frame of the excavation surface; The steel strand cable ring 3 is to stretch a steel strand 8 in the upper, middle and lower parts of the arc-shaped steel grid subsection 1, and connect them into a ring through the cable connection struct...
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The invention discloses a dragline type steel grating lagging jack and a construction method thereof. The steel grating lagging jack clinging to an excavation surface is surrounded by arc-shaped steelgrating subsegments and vertical steel grating subsegments through a plurality of steel strand dragline rings and subsegment connecting structures; the steel strand dragline rings are formed by stretching-drawing steel strands at the upper parts, the middle parts and the lower parts of the arc-shaped steel grating subsegments, and connecting through dragline connecting structures; each dragline connecting structure is characterized in that two steel angles are welded to a non-joint side face on a steel strand triple connector, circular holes are formed in the steel angles, and bolts are inserted into the circular holes; each subsegment connecting structure is formed by butt joint of two square flange plates; five circular holes are formed in each square flange plate; four main ribs and one longitudinal connecting rib are inserted into the circular holes. The dragline type steel grating lagging jack provided by the invention has the advantages of less steel material consumption, uniformity in overall stress, convenience in installation and construction and the like, and is applicable to preliminary bracing of a mine roadway and the like.
Description
technical field [0001] The invention relates to a cable-type steel grid arch frame and a construction method thereof, belonging to the fields of underground engineering support such as coal, military industry, metallurgy, transportation, and water conservancy. Background technique [0002] In order to solve problems such as land degradation, population explosion, and resource shortage, underground engineering construction has entered a stage of rapid development. In the process of underground engineering construction, in order to ease the movement of surrounding rock, suppress the separation of the roof, prevent the falling of stones, prevent the side wall, etc., it is necessary to support the underground engineering. One of the supporting methods is the arch support. protect. The arch support has good shrinkability and large bearing capacity, and can effectively restrain the deformation of the surrounding rock. It is widely used in underground projects such as coal, milita...
Claims
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IPC IPC(8): E21D11/18E21D11/14
Inventor 冉金林李廷春周游李春廷管清升殷齐浩王洪闪
Owner SHANDONG UNIV OF SCI & TECH