Tunnel inverted arch foundation reinforcing assembly

Abstract

The utility model discloses a tunnel inverted arch foundation reinforcing assembly which comprises a plurality of guide pipes which are arranged in a quincunx shape, each guide pipe is inserted into the bottom of a tunnel, the included angle between the guide pipes located on the two outer sides and the vertical direction is 15 degrees, the guide pipe located in the middle is perpendicular to the bottom of the tunnel, the driving length of the guide pipes ranges from 5 m to 8 m, and the driving length of the guide pipes ranges from 5 m to 8 m. The distance between every two adjacent guide pipes on the bottom surface of the tunnel is 1m; the conduit is filled with double-liquid slurry; the guide pipe is inserted into the bottom of the tunnel, pressure grouting is conducted in the guide pipe, grout is diffused to consolidate and reinforce the soil body at the bottom of the tunnel, compaction and dynamic compaction are better, and construction difficulty is small; and labor, machinery and material costs of basic treatment are reduced, and the method has a good development prospect.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of tunnel inverted arch foundation reinforcement. More specifically, the utility model relates to a tunnel inverted arch foundation reinforcement assembly. BACKGROUND

[0002] Loess has large pores and vertical joints, and under natural humidity, its compressibility is low and its strength is high, but when wetted by water, the strength of the soil significantly decreases, and the subsidence deformation caused by additional pressure and the self-weight pressure of the soil is a large amount of subsidence and fast subsidence speed unstable deformation, which is harmful to buildings, and at the present stage, the foundation treatment and reinforcement measures in loess tunnel civil engineering are: high-pressure grouting, high-pressure jet grouting pile, dynamic pressure concrete, CFG pile, dynamic compaction, replacement, dynamic / vibration compaction pile, grouting, rolling, static pressure (precast) and the like, but due to the limitation of the working face after loess tunnel excavation, the process flow connection is affected, and the above measures have little applicability in treating the tunnel bottom foundation, and the popularization rate is not high, and at the present stage, replacement, compaction, dynamic compaction and other measures are basically used; when important structures are passed under the loess tunnel, loess evolves into collapsible loess when wetted by water, and these measures cannot meet the safety quality requirements for the effect of foundation reinforcement, and affect the safety of surface structures and the settlement and convergence change in the hole. SUMMARY

[0003] In order to achieve these purposes and other advantages according to the utility model, a preferred embodiment of the utility model provides a tunnel inverted arch foundation reinforcement assembly, comprising a plurality of guide pipes arranged in a quincunx shape, each guide pipe is inserted into the tunnel bottom, the guide pipes located on the outer sides form an angle of 15° with the vertical direction, the guide pipes located in the middle are perpendicular to the tunnel bottom, the length of the guide pipes is 5-8m, and the distance between adjacent guide pipes on the surface of the tunnel bottom is 1m; double-liquid slurry is poured into the guide pipes; the front end of the guide pipe is sharp, and the side wall of the guide pipe is provided with an opening.

[0004] According to a preferred embodiment of the utility model, the double-liquid slurry comprises cement slurry and water glass with a volume ratio of 1:0.5.

[0005] According to a preferred embodiment of the utility model, the outlet of the guide pipe is plugged with plastic mud.

[0006] According to a preferred embodiment of the utility model, it further comprises a plurality of reinforcing pieces arranged around the guide pipe, one end of the reinforcing piece is movably hinged to the front end of the guide pipe, and the middle part of the reinforcing piece is connected to the outer side wall of the guide pipe through an elastic structure.

[0007] According to a preferred embodiment of the utility model, adjacent reinforcing pieces are connected by a steel wire rope.

[0008] According to a preferred embodiment of the present invention, the reinforcing plate includes a first reinforcing plate and a second reinforcing plate, which are connected at an obtuse angle, and the length of the first reinforcing plate is 1.5 times the length of the second reinforcing plate.

[0009] This utility model has at least the following beneficial effects: The tunnel invert foundation reinforcement component of this utility model strengthens the soil at the bottom of the tunnel by inserting a guide pipe into the bottom of the tunnel and injecting grout into the guide pipe under pressure. The grout diffuses and consolidates the soil at the bottom of the tunnel, which can solve the limitations of traditional foundation reinforcement measures in tunnel construction due to the size of the working face, process flow and process connection. The effect of foundation reinforcement is better than the commonly used replacement, compaction and dynamic compaction in tunnels, and the construction difficulty is small. It reduces the labor, machinery and material costs of foundation treatment and has good development prospects.

[0010] Other advantages, objectives and features of this invention will be partly apparent from the following description, and partly understood by those skilled in the art through study and practice of this invention. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the structure of the tunnel invert arch foundation reinforcement component in this utility model.

[0012] Figure 2 This is a schematic diagram of the structure of the catheter in this utility model. Detailed Implementation

[0013] The present invention will now be described in further detail with reference to the accompanying drawings, so that those skilled in the art can implement it based on the description.

[0014] The following description is intended to disclose the present invention so that those skilled in the art can implement it. The preferred embodiments described below are merely examples, and other obvious modifications will occur to those skilled in the art. The basic principles of the present invention defined in the following description can be applied to other embodiments, modifications, improvements, equivalents, and other technical solutions that do not depart from the spirit and scope of the present invention.

[0015] Those skilled in the art should understand that in the disclosure of this utility model, the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the above terms should not be construed as a limitation of this utility model.

[0016] It is understood that the term "a" should be understood as "at least one" or "one or more", that is, in one embodiment, the number of an element can be one, while in another embodiment, the number of the element can be multiple, and the term "a" should not be understood as a limitation on the number.

[0017] like Figure 1 As shown, a preferred embodiment of this utility model provides a tunnel invert foundation reinforcement component, including several guide tubes 1 arranged in a quincunx pattern. Each guide tube 1 is driven into the bottom of the tunnel 2, wherein the guide tubes on the two outer sides form a 15° angle with the vertical direction, and the guide tube in the middle is perpendicular to the bottom of the tunnel. The driving length of the guide tube 1 is 5-8m, and the distance between two adjacent guide tubes 1 on the bottom surface of the tunnel 2 is 1m. The guide tubes are filled with double-liquid grout. The front end of the guide tube is pointed, and the side wall of the guide tube has an opening.

[0018] The above-mentioned technical solution involves inserting a guide pipe into the bottom of the tunnel and injecting pressure grout into the pipe. The pressure grouting diffuses the grout to consolidate and reinforce the soil at the bottom of the tunnel. This solution overcomes the limitations of traditional foundation reinforcement measures, which are restricted by the size of the working face, the process flow, and the connection between processes when constructing inside the tunnel. The effect of the foundation reinforcement is better than that of commonly used tunnel replacement, compaction, and dynamic compaction methods. The construction is less difficult and reduces the labor, machinery, and material costs of foundation treatment, thus showing good development prospects.

[0019] According to a preferred embodiment of this utility model, the dual-liquid grout comprises cement grout and water glass in a volume ratio of 1:0.5. Using the above-mentioned cement-water glass dual-liquid grout results in a short gel time, a high stone formation rate in the grout body, and a certain strength, making it suitable for water-rich loess tunnels and capable of blocking water.

[0020] According to a preferred embodiment of the present invention, the outlet of the conduit 1 is sealed with plastic mud, and the cracks around the conduit are sealed with plastic mud. If necessary, the area near the grouting pipe and the working surface are sealed with concrete to prevent pressure loss during grouting.

[0021] According to a preferred embodiment of this utility model, it further includes reinforcing plates 3, of which multiple plates are arranged around the conduit 1. One end of each reinforcing plate 3 is movably hinged to the front end of the conduit, and the middle part of each reinforcing plate 3 is connected to the outer wall of the conduit via an elastic structure 4. The elastic structure can be a spring, such as a rigid spring. When the conduit is inserted below the tunnel, the compressed spring will generate a rebound force, opening the reinforcing plate 3 outward, making the whole structure more stable, especially during the upward process, the reinforcing plate plays a good role in fixing the conduit. Specifically, the reinforcing plate 3 includes a first reinforcing plate and a second reinforcing plate, which are connected at an obtuse angle. The length of the first reinforcing plate is 1.5 times the length of the second reinforcing plate. The first reinforcing plate is connected to the front end of the conduit. This structure of the reinforcing plate, based on the first reinforcing plate and with the addition of the second reinforcing plate, increases the contact area between the reinforcing plate and the soil layer, thereby improving the overall stability.

[0022] According to a preferred embodiment of the present invention, two adjacent reinforcing plates 3 are connected by steel wire ropes, which can further improve the stability of the entire structure.

[0023] Although the embodiments of this utility model have been disclosed above, they are not limited to the applications listed in the specification and embodiments. They can be applied to various fields suitable for this utility model. For those skilled in the art, other modifications can be easily made. Therefore, without departing from the general concept defined by the claims and their equivalents, this utility model is not limited to the specific details and the illustrations shown and described herein.

Claims

1. A tunnel invert foundation reinforcement component, characterized in that, It includes several conduits arranged in a quincunx pattern. Each conduit is driven into the bottom of the tunnel. The two outer conduits form a 15° angle with the vertical direction, and the middle conduit is perpendicular to the bottom of the tunnel. The length of each conduit is 5-8m, and the distance between two adjacent conduits on the bottom surface of the tunnel is 1m. The conduits are filled with a double-liquid grout. The front end of each conduit is pointed, and the side wall of each conduit has an opening.

2. The tunnel invert foundation reinforcement component according to claim 1, characterized in that, The outlet of the conduit was sealed with plastic putty.

3. The tunnel invert foundation reinforcement component according to claim 1, characterized in that, It also includes multiple reinforcing plates arranged around the conduit. One end of the reinforcing plate is movably hinged to the front end of the conduit, and the middle part of the reinforcing plate is connected to the outer wall of the conduit through an elastic structure.

4. The tunnel invert foundation reinforcement component according to claim 3, characterized in that, The two adjacent reinforcing plates are connected by steel wire ropes.

5. The tunnel invert foundation reinforcement component according to claim 4, characterized in that, The reinforcing plate includes a first reinforcing plate and a second reinforcing plate, which are connected at an obtuse angle. The length of the first reinforcing plate is 1.5 times the length of the second reinforcing plate.

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