Tunnel pipe shed

Abstract

The utility model discloses a tunnel pipe shed. The tunnel pipe shed is mainly used for improving design and construction of a guide wall and an orifice pipe. According to a common tunnel pipe shed design, an orifice pipe with the diameter of 140 mm and the wall thickness of 6 mm is pre-buried in a guide wall, and the orifice pipe is welded to a flange of I-shaped steel I 18. However, during actual construction, a pipe shed can be downwarped to invade an excavation contour line, and during hidden hole construction, the invasion limit pipe shed has to be cut. The upward inclination elevation angle of the orifice pipe can be increased, it can be known from the figure that the pipe shed exceeds the guide wall at the end of the guide wall, and it is indicated that if the thickness of the guide wall cannot meet the upward inclination angle according to the original design. The utility model provides a novel guide wall structure which can effectively solve the problem. The guide wall is designed to have a variable cross section, the orifice pipe is adjusted to 5-7 degrees, and the thickness of the protective layer is at least 5cm. A small amount of concrete is added to the variable cross-section guide wall, and the elevation angle of the orifice pipe is increased, so that the long pipe shed is downwarping without invasion, and the advanced support effect and action of the pipe shed are ensured.

Description

TECHNICAL FIELD

[0001] The utility model relates to tunnel construction technical field, specifically come to be a kind of tunnel pipe shed that makes long pipe shed under flexion not invade limit, guarantee the tunnel pipe shed of advance support effect and function. BACKGROUND

[0002] Pipe shed is the necessary means of tunnel entrance, pipe shed mainly plays two roles: (1) grouting reinforcement surrounding rock, improve the strength and integrity of surrounding rock; (2) pipe shed in 120 ° range of arch top, form a circle of artificial bearing arch, ensure tunnel safety entrance.But, according to the actual construction found, for the existing pipe shed structure, in the construction process, due to the long pipe shed (generally 30m or so), relative linear stiffness decreases, appears flexion invasion in stratum, needs to cut the pipe shed of invasion in dark hole construction, cannot play the role of pipe shed advance support.Waste material consumption time, and do not play the role of pipe shed. CONTENT OF UTILITY MODEL

[0003] Therefore, in order to solve the above-mentioned insufficient, the utility model provides a kind of tunnel pipe shed here.The tunnel portal pipe shed construction of present, pipe shed flexion invasion, cannot play the role of pipe shed as advance support.

[0004] The utility model is realized, construct a kind of tunnel pipe shed, its characterized in that;Including guide wall, preburied hole mouth pipe in guide wall, hole mouth pipe is welded on the flange of Ⅰ 18 I-shaped steel;The guide wall is the section of right-angle trapezoid, the upward angle of hole mouth pipe is 5~7 °, guarantee at least 5cm protective layer thickness, variable cross section guide wall increases concrete not much, increases hole mouth pipe upward angle, makes long pipe shed flexion not invasion, guarantee the advance support effect and function of pipe shed.

[0005] According to the tunnel pipe shed of the utility model, the guide wall is designed as 50cm thick, 200cm wide.

[0006] According to the tunnel pipe shed of the utility model, the hole mouth pipe is the hole mouth pipe with 140mm diameter and 6mm wall thickness.

[0007] The utility model has the following advantages: (1) change guide wall section form, effectively solve the problem of traditional pipe shed flexion invasion;(2) effectively solve the problem of traditional pipe shed invasion, need manual cutting invasion part, increase construction procedure and time, pipe shed advance support does not play the role;(3) after upward angle increases, can effectively reduce flexion, avoid interference to subsequent small guide pipe construction, stand. DRAWING DESCRIPTION

[0008] Figure 1 It is the design elevation view of two-lane tunnel pipe shed of separation type;

[0009] Figure 2 This is a schematic diagram of the relevant specifications for the guide wall;

[0010] Figure 3 This is a diagram illustrating the downward deflection of the pipe roof during construction.

[0011] Figure 4 This is a schematic diagram showing the upward tilt angle (approximately 5°) of the orifice pipe;

[0012] Figure 5 This is a schematic diagram of the improved guide wall in this application.

[0013] Among them: guide wall 1 (C30 concrete arch), orifice pipe 2, I18 I-beam 3. Detailed Implementation

[0014] The following will be combined with the appendix Figures 1-5 This utility model will be described in detail, and the technical solutions in the embodiments of this utility model will be clearly and completely described. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of this utility model.

[0015] This utility model provides a tunnel pipe roof, such as Figures 1-5 As shown, it can be implemented in the following manner; this technology mainly involves the improved design and construction of guide walls and orifice pipes; the elevation drawing of the separated two-lane tunnel pipe shed design is as follows. Figure 1 As shown in the figure, a 140mm diameter, 6mm wall thickness orifice pipe 2 is pre-embedded in the guide wall 1 (C30 concrete arch). Orifice pipe 2 is welded to the flange of I18 I-beam 3. The guide wall is designed to be 50cm thick and 200cm wide (see figure). Figure 2 During the design, the upward angle of the orifice pipe is 1~2°, that is, the pipe roof angle is 1~2°, such as Figure 2 As shown. However, during actual construction, the pipe roof may deflect downwards (see...). Figure 3 When the excavation outline is encroached upon, it becomes necessary to cut the encroaching pipe roof during tunnel construction. This can be addressed by increasing the upward tilt angle of the pipe at the orifice (approximately 5°), such as... Figure 4 As shown in the figure, the pipe roof extends beyond the guide wall at its end, indicating that the original guide wall thickness cannot meet the upward tilting angle requirement. Therefore, this application provides a novel guide wall (see...). Figure 5), which can effectively solve the problem. The guide wall is designed as a variable cross-section (the original design of the guide wall is a rectangular longitudinal section, and the improved guide wall is a right-angled trapezoidal section), and the orifice pipe adjustment is 5-7°, which ensures a thickness of at least 5cm of the protective layer. As can be seen from the figure, the variable cross-section guide wall increases the concrete by a small amount, and the orifice pipe is increased in the upward angle, so that the long pipe shed does not infringe the limit, and the effect and role of the pipe shed are ensured.

[0016] The patent has the following advantages and beneficial effects: (1) changing the cross-section form of the guide wall effectively solves the problem of traditional pipe shed deflection and infringement; (2) effectively solves the problem of traditional pipe shed infringement, which requires artificial cutting of the infringing part, increases the construction process and time, and the pipe shed does not play a role in the advanced support; (3) after increasing the upward angle, the deflection can be effectively reduced, and interference to the subsequent small guide pipe construction and stand formation can be avoided.

[0017] The above description of the disclosed embodiments enables a person skilled in the art to implement or use the utility model. Various modifications to the embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the utility model. Therefore, the utility model will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A tunnel shed, characterized in that; It comprises a guide wall (1), a hole pipe (2) is embedded in the guide wall (1), and the hole pipe is welded on the I18 H-shaped steel flange (3); the guide wall has a trapezoidal cross section, the upward angle of the hole pipe (2) is 5-7°, at least 5cm of the protective layer thickness is ensured, the variable cross section guide wall does not increase the concrete much, the upward angle of the hole pipe is increased, the long pipe shed is not invaded, and the advance support effect and role of the pipe shed are ensured.

2. A tunnel tube shed according to claim 1, wherein The guide wall (1) is designed to be 50cm thick and 200cm wide.

3. The tunnel pipe roof according to claim 1, wherein; The hole pipe (2) is a hole pipe with a diameter of 140mm and a wall thickness of 6mm.

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