Reinforcing structure of tunnel top
By setting up a reinforcement structure consisting of a full-ring steel frame, advanced pipe roof, and jet grouting piles around the tunnel and on the ground surface, the safety issues of tunnel construction and operation were solved, and a low-cost safety reinforcement effect was achieved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-05-21
- Publication Date
- 2026-03-27
AI Technical Summary
During tunnel construction, especially when tunneling under ponds, existing technologies are insufficient to effectively guarantee construction and operational safety, and construction costs are high.
The tunnel adopts a combination of tunnel body reinforcement and surface reinforcement structures, including a full-ring steel frame, advanced pipe roof, jet grouting piles, and overburden layer, forming a multi-layer reinforcement system to ensure the stability of the tunnel and the ground surface.
It ensures safety during tunnel construction and operation, reduces construction costs, and provides a reliable and convenient reinforcement structure.
Smart Images
Figure CN224049205U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to a reinforcing structure of tunnel hole top. BACKGROUND
[0002] The tunnel is the engineering construction that is built in the underground or underwater, and is used for the passage of vehicles, pedestrians, water flow and pipelines.
[0003] When the highway and railway are laid in the mountainous area, a large number of tunnels need to be set up due to the influence of the terrain and the existing ground buildings.
[0004] When the tunnel passes under the water pond, the construction of the tunnel will be affected, and safety accidents may be caused. Therefore, the water pond needs to be treated and the hole body needs to be reinforced before the tunnel construction. Therefore, the reinforcing structure of tunnel hole top is provided for the above problems. UTILITY MODEL CONTENT
[0005] The utility model aims at overcoming the defects of the prior art and providing a reinforcing structure of tunnel hole top, which ensures the safety of tunnel construction and operation.
[0006] The technical scheme for realizing the above-mentioned purpose is as follows: a reinforcing structure of tunnel hole top, comprising a hole body reinforcing mechanism and a ground surface reinforcing mechanism; the hole body reinforcing mechanism is arranged around the tunnel, and the ground surface reinforcing mechanism is arranged above the hole body reinforcing mechanism.
[0007] The hole body reinforcing mechanism comprises a full-ring steel frame and an advanced pipe shed, the inner wall of the tunnel is provided with secondary lining concrete, the full-ring steel frame is arranged around the secondary lining concrete, the advanced pipe shed is arranged on the outside of the tunnel, and the advanced pipe shed is arranged around the full-ring steel frame.
[0008] The ground surface reinforcing mechanism comprises a plurality of rotary jet piles and a covering layer, the plurality of rotary jet piles are arranged above the tunnel, and the covering layer is arranged above the plurality of rotary jet piles.
[0009] Preferably, the covering layer comprises backfilling soil and rock, a clay layer and planting soil; the backfilling soil and rock is arranged above the plurality of rotary jet piles, the clay layer is arranged above the backfilling soil and rock, and the planting soil is arranged above the clay layer.
[0010] Preferably, one end of the plurality of rotary jet piles is provided with backfilling soil.
[0011] Preferably, one end of the backfilling soil and rock, the clay layer and the planting soil is provided with slope protection.
[0012] Preferably, one side of the slope protection is provided with a drainage ditch.
[0013] Preferably, the backfilling soil is viscous soil.
[0014] The tunnel roof reinforcing structure has the advantages that the hole body reinforcing mechanism is arranged around the tunnel, the ground reinforcing mechanism is arranged above the hole body reinforcing mechanism, construction safety and operation safety are ensured during tunnel construction, the reinforcing structure is convenient to construct, reliable in structure and low in cost. BRIEF DESCRIPTION OF DRAWINGS
[0015] Fig. 1 is a schematic view of the tunnel roof reinforcing structure of the utility model;
[0016] Fig. 2 is a schematic view of the arrangement of the rotary jetting pile of the utility model.
[0017] In the drawing: 1, secondary lining concrete; 2, full-ring steel frame; 3, advanced pipe shed; 4, rotary jetting pile; 5, backfill soil; 6, backfill soil and stone; 7, clay layer; 8, planting soil; 9, slope protection; 10, drainage ditch; 11, water pond mud surface line. DETAILED DESCRIPTION
[0018] The technical scheme of the utility model will be described clearly and completely below in combination with the drawings. In the description of the utility model, it should be noted that the orientation or position relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like is based on the orientation or position relationship shown in the drawings, and is only for the convenience of describing the utility model and simplifying the description, and therefore cannot be understood as a limitation on the utility model that the indicated device or element must have a particular orientation, be constructed in a particular orientation and be operated. In addition, the terms "first", "second", "third" are only for the purpose of description, and cannot be understood as indicating or implying the importance of the opposite.
[0019] The utility model will be further described below in combination with the drawings.
[0020] As Figs. 1-2 shown, a tunnel roof reinforcing structure comprises a hole body reinforcing mechanism and a ground reinforcing mechanism; the hole body reinforcing mechanism is arranged around the tunnel, and the ground reinforcing mechanism is arranged above the hole body reinforcing mechanism; the hole body reinforcing mechanism comprises a full-ring steel frame 2 and an advanced pipe shed 3, a secondary lining concrete 1 is arranged on the inner wall of the tunnel, the full-ring steel frame 2 is arranged on the periphery of the secondary lining concrete 1, the advanced pipe shed 3 is arranged on the outer side of the tunnel, and the advanced pipe shed 3 is located on the periphery of the full-ring steel frame 2.
[0021] Specifically, the secondary lining concrete 1 is C35 reinforced concrete, the impermeability grade is ≥P10, and the thickness is 85 cm. The full-ring steel frame 2 is a 22a type steel, the spacing is 0.6 m, and the full-ring steel frame 2 is arranged on the periphery of the secondary lining concrete 1. The advanced pipe shed 3 is a pipe shed with a diameter of 76 mm, a length of 9 m, an overlap of 3 m, a ring spacing of 0.6 m, 50 roots per ring, and the pipe shed is grouted.
[0022] Specifically, the ground surface reinforcing mechanism comprises a plurality of rotary jet grouting piles 4 and a covering layer, the plurality of rotary jet grouting piles 4 are arranged above the tunnel, and the covering layer is arranged above the plurality of rotary jet grouting piles 4. The rotary jet grouting piles 4 have a diameter of 600 mm, are arranged in a regular triangle, have a length of 5 m, and have a spacing of 1 m.
[0023] Specifically, the covering layer comprises backfilling soil and rock 6, a clay layer 7, and planting soil 8; the backfilling soil and rock 6 is arranged above the plurality of rotary jet grouting piles 4, the clay layer 7 is arranged above the backfilling soil and rock 6, and the planting soil 8 is arranged above the clay layer 7. The backfilling soil and rock 6, the clay layer 7, and the planting soil 8 have thicknesses of 1 m, 50 cm, and 30 cm, respectively.
[0024] Specifically, one end of the plurality of rotary jet grouting piles 4 is provided with backfilling soil 5. The backfilling soil 5 is made of cohesive soil. The soil and mud surface line 11 is excavated to a depth of 1 m, and then backfilled with 5 m of backfilling soil.
[0025] Specifically, one end of the backfilling soil and rock 6, the clay layer 7, and the planting soil 8 is provided with slope protection 9. The slope protection 9 is provided with a drainage ditch 10 on one side. The slope protection 9 is grassed by spraying and seeding, and has a slope of 1:2. The drainage ditch 10 is 2 m away from the slope toe of the slope protection 9, is inverted trapezoidal, has a depth of 50 cm, a lower opening width of 30 cm, an upper opening width of 60 cm, and a thickness of 10 cm.
[0026] The reinforcing structure of the tunnel roof, by arranging the tunnel body reinforcing mechanism around the tunnel, arranging the ground surface reinforcing mechanism above the tunnel body reinforcing mechanism, ensures the construction safety and operation safety during the tunnel construction, and the reinforcing structure is convenient to construct, reliable in structure, and low in cost.
[0027] The above embodiments are only used to illustrate the technical solutions of the present application, and are not limited thereto; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that the technical solutions recorded in the foregoing embodiments can be modified, or some or all of the technical features can be replaced by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.
Claims
1. A reinforcing structure for a tunnel roof, characterized by The tunnel body reinforcing mechanism and the ground surface reinforcing mechanism; the tunnel body reinforcing mechanism is arranged around the tunnel, and the ground surface reinforcing mechanism is arranged above the tunnel body reinforcing mechanism; The tunnel body reinforcing mechanism comprises a full-ring steel frame (2) and a forepoling pipe shed (3), the inner wall of the tunnel is provided with secondary lining concrete (1), the periphery of the secondary lining concrete (1) is provided with the full-ring steel frame (2), and the outer side of the tunnel is provided with the forepoling pipe shed (3); the forepoling pipe shed (3) is located at the periphery of the full-ring steel frame (2). The ground surface reinforcing mechanism comprises a plurality of rotary jet piles (4) and a covering layer, the plurality of rotary jet piles (4) are arranged above the tunnel, and the covering layer is arranged above the plurality of rotary jet piles (4).
2. A reinforcing structure for a tunnel roof according to claim 1, characterized in that The covering layer comprises backfilling soil and rock (6), a clay layer (7) and planting soil (8); the plurality of rotary jet piles (4) are arranged above the backfilling soil and rock (6), the backfilling soil and rock (6) is arranged above the clay layer (7), and the clay layer (7) is arranged above the planting soil (8).
3. A reinforcing structure for a tunnel roof according to claim 1, wherein One end of the plurality of rotary jet piles (4) is provided with backfilling soil (5).
4. A reinforcing structure for a tunnel roof according to claim 2, wherein One end of the backfilling soil and rock (6), the clay layer (7) and the planting soil (8) is provided with a slope protection (9).
5. A reinforcing structure for a tunnel roof according to claim 4, wherein One side of the slope protection (9) is provided with a drainage ditch (10).
6. A reinforcing structure for a tunnel roof according to claim 3, wherein The backfilling soil (5) is viscous soil.