Segmental precast concrete ventilating slabs of structure and construction way in tunnel for rapid installation

摘要

The present invention is provided with a wind guide slab 150 that crosses the upper side of the spring line 91 in the tunnel 90 to supply and exhaust air inside the tunnel structure, and when a cross flow method is applied, the wind guide slab 110 ) Install a bulkhead 150 that vertically partitions between the crown portion of the tunnel lining 100 and the windpipe slab 110 and the pressure jaw 101 from the upper surface side, or a tunnel without a bulkhead 150 as in the case of a semi-cross flow type In installing the tunnel wind slab 200 of any one of the facilities for internal ventilation, The bracket 110 protruding to the inside of the tunnel lining 100, and the wind slab 110 divided into both sections inclined upward from the bracket, the pressure jaw 101, which is a protrusion, is formed on the central side, and the inside The edge 103 side of the wind guide slab 110, which has created several cavities 102 in the transverse direction, is placed in the tunnel lining 100 bracket 104, respectively, and protrudes from the edge of the sectioned slabs 110' and 110". The stopper 105, which is the drawn out reinforcing bar 119, is mounted in close contact with the tunnel lining 100, and the pressure jaw 101, which is a protrusion on the central side, forms a mutual butt between the cut-out slabs 110' and 110" on both sides. And the wind slab 110, When the windmill slab 110 is mounted, several sets of cut slabs 110', 110" on one side and the other side in the production and yard outside the tunnel pit are placed on the first bogie 200' in the shape of a hat. Put it on the tunnel lining 100 and move the stroke of the control hydraulic jack 209 disposed on the main beam 201 so that it can pass over the bracket 104 in a lifted state, and several sets of wind slabs 110 ) In order to ensure that the end 103 side is mounted on the bracket 104 of the tunnel lining 100 at the same time, if the stroke of the hydraulic jack 202 at the upper end of the first bogie 200 ′ transverse beam 203 is gradually lowered, the single-piece slab (110 ', 110 ") The pressure jaws 101 on both sides are automatically brought into contact with each other so that the compression force 101 due to their own weight is introduced into the slabs 110 ', 110 " on both sides along the slope of the hat. method and Here, after first lowering the stroke of the control hydraulic jack 209 disposed on the main beam of the first bogie 200', the first bogie 200' is completely separated from the wind slab 110, and then the first bogie 200' is the upper end. Since the chain block 206 disposed on the 2, lowering the tunnel lining 100 to below the bracket 104 face to form the first entry bogie 200', cross the other entering first bogie 200', and the wind road outside the tunnel and to move the slab 110 to the production site and the yard; As another method, the second bogie 200" lowers the stroke disposed between the main beams 201 so that the transverse beam 203 is horizontal, and then the C-shaped steel 207 installed on either side of the transverse beam 203 is selected. After entering the other transverse beam 203 and entering the C-beam 207 installed on the other transverse beam 203 into the transverse beam 203 on either side to form a structure that does not shake, the tunnel 80, out-of-pit wind slab 110 manufacturing site and Two methods of mounting so that it can be moved to the yard; When mounting the wind slab 110 in a state where the exposed reinforcing bar bracket 113 is installed, the lifting and lowering of the control hydraulic jack 209 of any one of the first bogie 200' and the second bogie 200" is controlled. 3 methods of mounting configured to pass through the bracket reinforcing bar 124 of the exposed reinforcing bar bracket 113 using In the above, the bracket 104, which is an obstacle to mounting the wind slab 110, is separated from the existing shape and composed of an exposed reinforcing bar bracket 113, which is a horizontal and inclined hole 114 in the tunnel lining 110. In the state where the screw-type small steel pipe 135 is embedded and fixed, and the bracket reinforcing bar 124 is installed and bound, when mounted on the second bogie 200", both side sectioned slabs (110', 110") The bracket reinforcing bar 124 of the exposed reinforcing bar bracket 113 is passed through the line port 132 installed on the 103) side, and the bent steel plate 116 with the rubber packing 117 attached to the edge is applied to the exposed reinforcing bar bracket 113. After placing the rubber pad 141 in a state where it is inserted into the upper reinforcing bar to form an uneven portion, the cut slabs 110' and 110" are mounted, but the edge 103 lower groove 115 is a bent steel plate 116 iron To fit into the (凸) part, to be combined with a bolt and nut (BN), to install a reinforcing bar 125, and to install a non-shrinkable mortar 118 to the bent part; The soft bracket 104 on the tunnel lining 100 is installed intermittently, not continuously, forming a certain length, and the intermittent bracket 104 is installed with the exposed reinforcing bar bracket 113 as described above. The bracket reinforcing bar 124 of the exposed reinforcing bar bracket 113 is passed through the line port 132 installed on the edge 103 side of both sides of the In a state in which the cut slabs 110' and 110" on both sides are lifted to be located in the center, the bent steel plate 116 with a rubber packing 117 attached to the edge and the rubber pad 141 are attached to the exposed reinforcing bar bracket 113. ) Insert into the upper reinforcing bar to form a concave-convex portion, and then mount the cut slabs 110 ', 110 ", so that the edge 103, lower groove 115 is inserted into the convex portion of the bent steel plate 116. To be combined with bolts and nuts (BN), install reinforcing bars 125 and install non-shrink mortar 118 at the bending part, and concrete bracket 104 for pouring rust-preventing shotcrete and exposed reinforcing bar bracket 113 4 methods of mounting to be configured concurrently, By placing several circular concavo-convex 131 on the pressure jaw 101 facing from the central side of the wind slab 110, the male and female are coupled to each other so as not to be displaced from each other, and the binding hole 107 installed at the bottom ) The installation of the binding reinforcing bar 108 inside is a facility for stabilizing the wind speed slab 110 in preparation for seismic waves, and the hook installed with the reinforcing bar in the wind speed slab 110 in the wind guide slab 110 between long legs ( 109) and a wire 112 made of a pc twisted wire and a turnbuckle or cable on the latch 111 installed in the tunnel lining 100 to provide a preparation for the deflection and fall of the wind slab 110, When the cut-off slabs 110', 110" are arranged at a certain angle, the pull-out reinforcing bar 119 is disposed at the edge of the cut-off slabs 110', 110". (105) to set up to function; In installing the cavity 102 in the wind slab 110, the membrane structure 120 is composed of a short side, these joints are wrapped with a cut short side exterior 121, tied with a band, sprinkled with water, and covered with a vinyl 122. After pouring and curing, the air is removed from the membrane structure 120 to recover both the membrane structure 120 and the cut short side exterior 121, so that the cavity 102 can be created, or the long side exterior 133 And the facility using the lubricant 134, In the cross-flow ventilation method that requires a bulkhead 150 facility, a relatively light material is placed between the pressure jaw 101 part protruding from the top of the tunnel wind slab 110 and the crown part and the facility is installed so that it can be fixed, A segmented wind speed slab capable of rapid installation in a tunnel, characterized in that a fireproof material 123 is applied to the lower surface of the installed wind guide slab 110 to protect the structure of the wind guide slab 110 due to a fire in the tunnel 80. structure