Tunnel secondary lining arch unit and the arch structure and erection method formed by it
A technology of secondary lining and arch frame, applied in tunnel lining, tunnel, shaft lining and other directions, can solve the problems of reducing waterproof capacity, increasing the risk during tunnel operation, reducing the life of secondary lining, etc. Good application prospect and promotion value, high work efficiency
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Embodiment 1
[0036] Such as Figure 1 ~ Figure 4 As shown, a tunnel secondary lining arch unit includes three arch unit main reinforcements 1 of the same length, and the three arch unit main reinforcements 1 together form an arch unit frame with an equilateral triangle cross section. The main reinforcement 1 of the arch unit is made of HRB335 or HRB400 steel, and the diameter of the main reinforcement 1 of the arch unit is 20mm-28mm. The exterior of all arch unit frames is fixedly connected by several stirrups 2 to form an arch unit skeleton, and the two ends of the arch unit skeleton are respectively fixedly connected with connecting angle steel 3, and bolt holes 4 are opened on the connecting angle steel 3. In this embodiment, The connecting angle steel 3 is made of Q235 steel material. Such as figure 1 , figure 2 As shown, the stirrups 2 are arranged at regular intervals along the length direction outside the arch unit frame; the stirrups 2 are made of HRB335 steel bar material or HRB...
Embodiment 2
[0048] Such as Figure 1 ~ Figure 4 As shown, a tunnel secondary lining arch unit includes four arch unit main reinforcements 1 of the same length, and the four arch unit main reinforcements 1 together form an arch unit frame with a square cross-section, and two adjacent arch units The net spacing of the main reinforcement 1 of the unit is 350mm. The exterior of all the arch unit frames are fixedly connected by a number of stirrups 2 to form an arch unit skeleton, and the two ends of the arch unit skeleton are respectively fixedly connected with connecting angle steel 3 , and bolt holes 4 are opened on the connecting angle steel 3 .
[0049] Such as figure 1 , figure 2 As shown, the stirrups 2 are arranged at regular intervals along the length direction outside the frame of the arch unit.
[0050] Such as image 3 As shown, two bolt holes 4 are opened on the connecting angle steel 3, and bolts and nuts 5 are installed in the bolt holes 4; the connecting angle steel 3 is f...
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