Method of treating tunnel collapse using pavilion support

A method of treating tunnel collapse using a pavilion support, comprising the following steps:

• at step 1, mounting a pavilion support structure, comprising an assembly base, a shield plate, a column, a longitudinal canopy, and a transverse canopy, wherein the longitudinal canopy and the transverse canopy are fixed on the shield plate, and the column is fixed between the base and the shield plate;
• at step 2, leveling a collapse body under a collapse cavity to form a platform, and placing the pavilion support structure on the platform;
• at step 3, inserting a plurality of hydraulic props into a bottom prop groove on the base under the protection of the shield plate, lifting the plurality of hydraulic props to enable each hydraulic prop of the plurality of hydraulic props to be fitted with the longitudinal canopy or the transverse canopy;
• at step 4, disconnecting the column and the base, and continuing lifting the plurality of hydraulic props smoothly until a lower edge of a top prop groove is higher than a contour line of an initial supporting arch;
• at step 5, mounting a bottom column, firstly fixing a lower connection plate of the column and an upper connection plate of the bottom column and then inserting a padding plate between the bottom column and the base;
• at step 6, erecting the initial supporting arch under the shield plate, and fixedly connecting an original supporting structure in a tunnel and the initial supporting arch under the shield plate to form an initial supporting shed;
• at step 7, removing the plurality of hydraulic props, mounting an air discharge pipe and a filling material pumping pipe on the shield plate, and laying an anchor net under the initial supporting arch;
• at step 8, spraying concrete onto the initial supporting arch, and after setting of the concrete, pumping a filling material into the collapse cavity and discharging air in the collapse cavity with the air discharge pipe until the collapse cavity is filled up with the filling material.