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Anti-pucking tunnel inverted arch structure
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A technology of arch structure and arch structure, which is applied in the direction of tunnel, tunnel lining, shaft equipment, etc., can solve the problems of troubled construction safety and lagging construction period, affecting the passage of construction vehicles, endangering the safety of people, etc. The effect of increasing stiffness and increasing the ability to resist buoyancy
Inactive Publication Date: 2020-07-10
CHINA RAILWAY 18TH BUREAU GRP CO LTD +1
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Abstract
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The main hazards of the inverted arch floor drum to the tunnel construction are: the inverted arch floor drum is often accompanied by strong deformation or damage of the tunnel, such as secondary lining cracking, falling blocks and intrusion into the boundary, etc., endangering the safety of people, affecting the passage of construction vehicles, and seriously disturbing the construction. Safety and Backlogs
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Embodiment 1
[0030] In a typical embodiment of the present invention, such as Figure 1 to Figure 4 As shown, a tunnel inverted arch structure with anti-floor drum, including arch foot locking anchor 1, anti-floating anchor 2, prestressed anchor 5, self-drilling hollow grouting anchor 4, foam concrete layer, reinforced concrete The main body of the inverted arch structure 8 is formed after the pouring of the reinforced concrete layer. A mortise and tenon structure is set at the connection surface with the cast-in-place secondary lining 9 to make the two more closely combined; a steel joint 3 is reserved between the main body 8 of the inverted arch structure and the secondary lining 9, and the rigidity of the structure is increased by using steel bars to connect , Strengthen the anti-deformation performance.
[0031] In this example, please refer to figure 1 , figure 1 A sectional view showing the main structure of this embodiment is shown, and the orientation in this figure is used as a...
Embodiment 2
[0043] In a typical implementation of the present invention, a construction method of a floor drum-resistant tunnel inverted arch structure is disclosed, comprising the following steps:
[0044] 1) Tunnel excavation, construction initial support;
[0045] 2) After the initial support construction is completed, the inverted arch is excavated, leveled and treated for the base, and the prestressed anchor rods 5 are installed, and the prestressed anchor rods 5 are installed at the arch feet on both sides of the tunnel;
[0046] 3) Drilling self-drilling prestressed anchor rods 4, symmetrically distributed with respect to the central axis of the tunnel, and grouting after the drilling is completed;
[0047] 4) Set up arch foot locking anchor 1 and anti-floating anchor 2;
[0048] 5) Fill the foam concrete base cushion 10, and add an appropriate amount of carbon fiber to improve the strength;
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Abstract
The invention discloses an anti-pucking tunnel inverted arch structure, and belongs to the field of civil engineering. An inverted arch structure body, a base cushion layer and anchor rods are included. The base cushion layer is arranged on the inner side of the inverted arch structure body, and the inverted arch structure body is fixedly connected with the anchor rods. The multiple anchor rods are arranged and penetrate through the base cushion layer to be inserted into surrounding rock. The two end portions of the inverted arch structure body are connected with the anchor rods. A forward arch structure can be formed by the anchor rods at the two ends of the inverted arch structure body. The anchor rods at the two ends of the inverted arch structure body can be connected with an upper lining and lining foot locking anchor rods. The anti-pucking tunnel inverted arch structure can avoid harm to tunnel construction from inverted arch pucking and harm to tunnel operation from inverted arch pucking.
Description
technical field [0001] The invention belongs to the field of civil engineering, and in particular relates to a floor drum-resistant tunnel inverted arch structure. Background technique [0002] The statements herein merely provide background information related to the present invention and do not necessarily constitute prior art. [0003] The inverted arch of the tunnel is a reverse arched structure set at the bottom of the tunnel to improve the stress condition of the upper supporting structure. It is one of the main components of the tunnel structure. The load on the road surface is effectively transmitted to the ground, and it can also effectively resist the reaction force from the lower layer of the tunnel. [0004] The inventors found that the bottom drum of the inverted arch destroyed the overall support structure of the tunnel formed together with the secondary lining, which caused great harm to the construction and operation of the tunnel. The main hazards of the i...
Claims
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Application Information
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