Concrete covering prevention protection device for arch foot connecting plate of steel arch frame

Abstract

The utility model discloses a protection device for preventing concrete from covering an arch foot connecting plate of a steel arch frame, the bottom of the steel arch frame is connected with the arch foot connecting plate, the protection device comprises two protection structures, the two protection structures are both arranged on the arch foot connecting plate and cover the arch foot connecting plate, and the two protection structures are symmetrically located on the two sides of the steel arch frame respectively; the protection structure comprises a protection plate and a connecting rod, the protection plate is laid on the surface of the arch foot connecting plate, one end of the connecting rod abuts against the protection plate, the other end of the connecting rod is connected with the steel arch, and the protection structure has the advantages of being easy and convenient to install, high in precision and high in efficiency and can guarantee comprehensive protection of the connecting plate in construction.

Description

Technical Field

[0001] The utility model relates to the field of preventing concrete covering and protecting the connecting plate at the arch foot of a steel arch. More specifically, the utility model relates to a device for preventing concrete covering and protecting the connecting plate at the arch foot of a steel arch. Background Art

[0002] In the construction of a double-track high-speed railway tunnel with a speed of 350 km / h, the initial support is a key link to ensure the stability and safety of the tunnel structure. During the process of shotcreting the upper bench, the bolt holes of the connecting plate at the arch foot are easily covered by the shotcrete, which poses a hidden danger for subsequent construction steps. The protection of the traditional connecting plate at the arch foot mainly relies on the operators to cover it with muck. This method has obvious limitations: 1. Poor protection effect: It is difficult to form a tight protective layer with muck covering, and the shotcrete is easy to penetrate, resulting in the blockage of bolt holes. 2. Construction quality problems: The muck covering may also affect the density and uniformity of the shotcrete, thereby reducing the strength of the overall support structure. 3. Low working efficiency: Manually covering muck is not only time-consuming and laborious, but also difficult to ensure the accuracy and consistency of the covering. Construction quality problems and rework costs. Due to the limitations of the above protection methods, the following problems often occur during the construction process: 1. Damage and deformation of the connecting plate at the arch foot: When erecting the frame of the lower bench, due to the blockage of bolt holes or damage to the connecting plate, it is easy to cause deformation or even fracture of the connecting plate. 2. Incompacted shotcrete: The shotcrete under the muck covering is difficult to reach the ideal density, affecting the support effect. 3. High rework cost and difficulty: The unqualified part of the project needs to be reworked, which not only increases the cost, but also prolongs the construction period, having an adverse impact on the overall construction progress. Summary of the Utility Model

[0003] To achieve these and other advantages according to the present utility model, a preferred embodiment of the present utility model provides a device for preventing concrete covering and protecting the connecting plate at the arch foot of a steel arch. The bottom of the steel arch is connected with a connecting plate at the arch foot. The device for preventing concrete covering and protecting the connecting plate at the arch foot of the steel arch includes two protection structures, both of which are arranged on the connecting plate at the arch foot, covering the connecting plate at the arch foot therein, and the two protection structures are symmetrically located on both sides of the steel arch respectively;

[0004] The protection structure includes a protection plate and a connecting rod. The protection plate is laid on the surface of the connecting plate at the arch foot, one end of the connecting rod abuts against the protection plate, and the other end is connected to the steel arch.

[0005] According to a preferred embodiment of the present utility model, the protection plate is a foam board.

[0006] According to a preferred embodiment of the present utility model, the protection structure further includes a fixing member, which is horizontally arranged, the connecting rod is obliquely arranged, and the fixing member and the connecting rod are fixed as a whole.

[0007] According to a preferred embodiment of the present utility model, a slot is provided at one end of the protection plate close to the steel arch, so as to avoid the flange plate of the steel arch.

[0008] According to a preferred embodiment of the present utility model, the fixing member is a fixing plate or a fixing steel bar.

[0009] According to a preferred embodiment of the present utility model, when the fixing member is a fixing steel bar, its diameter is more than 5 times the diameter of the connecting rod.

[0010] The present utility model has at least the following beneficial effects:

[0011] (1) The concrete covering protection device for the connecting plate at the arch foot of the arch frame ensures the comprehensive protection of the connecting plate during construction with its characteristics of simple installation, high precision and fast efficiency.

[0012] (2) The device greatly reduces the construction difficulty, effectively improves the quality of the initial support, and ensures the stability of the tunnel structure.

[0013] (3) The device can also significantly shorten the cycle time of the construction process, speed up the project progress, and improve the overall construction efficiency.

[0014] Other advantages, objectives and features of the present utility model will be partially reflected by the following description, and partially will also be understood by those skilled in the art through the research and practice of the present utility model. Description of the Drawings

[0015] Figure 1 It is the front view of the concrete covering protection device for the connecting plate at the arch foot of the steel arch in the present utility model.

[0016] Figure 2 It is the top view of the concrete covering protection device for the connecting plate at the arch foot of the steel arch in the present utility model.

[0017] Figure 3 It is the structural schematic diagram of the protection plate in the present utility model. Detailed Embodiment

[0018] The following further detailed description of the present utility model is made in conjunction with the drawings, so that those skilled in the art can implement it according to the description in the specification.

[0019] The following description is used to disclose the present utility model so that those skilled in the art can implement the present utility model. The preferred embodiments in the following description are only examples, and those skilled in the art can think of other obvious deformations. The basic principles defined in the following description of the present utility model can be applied to other implementation schemes, deformation schemes, improvement schemes, equivalent schemes, and other technical schemes without departing from the spirit and scope of the present utility model.

[0020] Those skilled in the art should understand that in the disclosure of the present utility model, the orientation or positional relationship indicated by the terms "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, the above terms should not be construed as limiting the present utility model.

[0021] It can be understood that the term "one" should be understood as "at least one" or "one or more". That is, in one embodiment, the number of one element can be one, while in other embodiments, the number of this element can be multiple. The term "one" should not be construed as limiting the quantity.

[0022] As Figures 1-3 shown, a preferred embodiment of the present utility model provides a protection device for preventing the concrete from covering the arch foot connecting plate of the steel arch frame. The bottom of the steel arch frame 1 is connected with the arch foot connecting plate 2. The protection device for preventing the concrete from covering the arch foot connecting plate of the steel arch frame includes two protection structures, which are both arranged on the arch foot connecting plate 2, covering the arch foot connecting plate 2 therein, and the two protection structures are symmetrically located on both sides of the steel arch frame 1 respectively;

[0023] The protection structure includes a protection plate 3 and a connecting rod 4. The protection plate 3 is laid on the surface of the arch foot connecting plate 2. One end of the connecting rod 4 abuts against the protection plate 3, and the other end is connected to the steel arch frame 1.

[0024] The protection structure further includes a fixing member 5, which is horizontally arranged. The connecting rod 4 is obliquely arranged, and the fixing member 5 and the connecting rod 4 are fixed as a whole.

[0025] Construction steps:

[0026] (1) Installation of the steel arch frame

[0027] Through measurement and setting out, determine the installation position of the steel arch frame, erect the steel arch frame and fix it.

[0028] (2) Installation of the foam board

[0029] Place the two pre-processed protection plates 3 on the arch connecting plate 2 and splice them in place.

[0030] (3) Reinforcement of the protection device

[0031] Fix the pre-processed fixing piece 5 and the connecting rod 4 into one body, then use the fixing piece 5 to press the protection plate 3, and weld the connecting rod 4 to the steel arch 1. The two protection structures form a protection device for preventing the concrete from covering the arch foot connecting plate of the arch.

[0032] According to a preferred embodiment of the present invention, the protection plate 3 is a foam board, which can play a good protective role for the arch foot connecting plate, and has light weight and low cost.

[0033] According to a preferred embodiment of the present invention, a slot 6 is provided at one end of the protection plate 3 close to the steel arch to avoid the flange plate of the steel arch. It is equivalent to that the two protection plates 3 are clamped on both sides of the steel arch and assembled into a complete structure to cover the arch foot connecting plate.

[0034] According to a preferred embodiment of the present invention, the fixing piece is a fixing plate or a fixing steel bar. The fixing plate has a large contact area with the protection plate and better pressing stability effect, while the fixing steel bar has a wide source and low cost.

[0035] According to a preferred embodiment of the present invention, when the fixing piece is a fixing steel bar, its diameter is more than 5 times the diameter of the connecting rod, so as to further increase the contact area between the fixing steel bar and the protection plate and ensure better pressing stability effect.

[0036] Although the embodiments of the present invention have been disclosed as above, it is not limited to the applications listed in the specification and embodiments. It can be fully applied to various fields suitable for the present invention. For those skilled in the art, additional modifications can be easily made. Therefore, without departing from the general concept defined by the claims and the equivalent scope, the present invention is not limited to the specific details and the illustrated examples here.

Claims

1. A protective device for preventing concrete covering of a steel arch foot connecting plate, wherein the bottom of the steel arch is connected with an arch foot connecting plate, characterized in that: The anti-concrete covering protection device for the arch foot connection plate of the steel arch frame includes two protection structures, both of which are arranged on the arch foot connection plate to cover the arch foot connection plate, and the two protection structures are symmetrically located on both sides of the steel arch frame; The protection structure comprises a protection plate and a connecting rod. The protection plate is laid on the surface of the arch foot connecting plate. One end of the connecting rod abuts against the protection plate, and the other end is connected to the steel arch frame.

2. The device for protecting the steel arch foot connection plate from concrete covering according to claim 1 is characterized in that: The protection plate is a foam plate.

3. The device for protecting the steel arch foot connection plate from concrete covering according to claim 1 is characterized in that: The protection structure also includes a fixing piece, which is arranged horizontally, and the connecting rod is arranged obliquely, and the fixing piece and the connecting rod are fixed as a whole.

4. The device for protecting the steel arch foot connection plate from concrete covering according to claim 3 is characterized in that: The protection plate is provided with a slot at one end close to the steel arch frame to avoid the flange plate of the steel arch frame.

5. The device for protecting the steel arch foot connection plate from concrete covering according to claim 4 is characterized in that: The fixing member is a fixing plate or a fixing steel bar.

6. The device for protecting the steel arch frame arch foot connection plate from concrete covering according to claim 5, characterized in that: When the fixing member is a fixed steel bar, its diameter is more than 5 times the diameter of the connecting rod.

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