Bridge cast stone balustrade formed by grouting connection of stand columns

Abstract

The utility model discloses a bridge cast stone balustrade with grouting connection of stand columns, belongs to the field of bridge balustrades, and solves the problems that a traditional stone balustrade is too large in dead weight, a base is heavy, and installation is not firm. The fence comprises a stand column and a fence plate, the stand column is installed on a base, an installation notch is formed in the top of the base, a cavity is formed in the stand column, the bottom of the cavity is of an open structure, concrete is integrally poured into the cavity and the installation notch, and the concrete in the cavity is not poured to the top of the stand column. The vertical column of the stone balustrade adopts a cavity casting stone structure, so that the self weight of the stone balustrade is effectively reduced, and the load of a bridge body is reduced; according to the utility model, the railing upright post and the base are poured into a whole in a manner of pouring connection at the top of the upright post, so that the stability of the railing is enhanced, and the structural size of the base is reduced; due to the fact that the stand column embedded steel bars are arranged in the stand column, ductility and toughness of the stand column are improved, material characteristics of the steel bars and cast stone are effectively exerted, and materials are fully utilized.

Description

Technical Field

[0001] The utility model belongs to the field of bridge railings, and in particular relates to a cast stone bridge railing connected by grouting of upright columns. Background Art

[0002] Bridge railings are common accessory structures. For conventional bridges, well-designed railings serve to identify the structure and enhance the surrounding environment, making them important landscape elements. Stone railings, on the other hand, have a long history, are durable, aesthetically pleasing, and blend seamlessly with the surrounding environment. They are widely used on bridges, often providing a finishing touch. However, due to the characteristics of natural stone (heavy weight, brittleness, and poor bending resistance), stone railings also have some drawbacks. An investigation of stone railings on highway and municipal bridges revealed the following key drawbacks.

[0003] 1) Traditional stone railings are bulky and heavy. According to the "Urban Bridge Design Code" (CJJ 11-2011), "the vertical load acting on sidewalk handrails should be 1.2 kN / m; the horizontal outward load should be 2.5 kN / m." Structural calculations for stone railings show that to meet these design requirements, the column cross-section must be no less than 25 x 25 cm, the handrail cross-section no less than 15 x 15 cm, the column spacing no more than 2.0 m, and the stone strength grade must be no less than MU120. At this point, the deadweight of the railing reaches 4.5 to 5.5 kN / m, far greater than that of materials like carbon steel, stainless steel, and concrete. This increases the load on the bridge and has a certain impact on the bridge structure.

[0004] 2) The railing foundation is large, and the columns are not securely installed. Stone railings and bridges often use a mortise and tenon connection. This involves setting a concrete base on the bridge deck as the railing foundation. Grooves are created at intervals of approximately 1.5 to 2.0 meters to embed the railing columns. The gaps between the columns and the grooves are filled and secured with epoxy mortar. To meet the requirements for mortise and tenon installation and the minimum protective layer thickness of the base reinforcement, the foundation dimensions are typically much larger than the column dimensions. For example, for a 25×25 cm rectangular column, the foundation thickness must be 45 cm to meet the requirements. Excessively large foundation dimensions not only affect the appearance but also increase the load on the bridge. The columns and foundation are secured with epoxy mortar. If vibration is not dense, the joints may become loose or fall off.

[0005] 3) High stone strength requirements make railings expensive. As shown in 1), the strength grade of bridge stone railings must be no less than MU120. Typically, only structurally sound, uniform granite can meet this requirement, resulting in railings being much more expensive than concrete or steel railings.

[0006] In summary, natural stone bridge railings offer significant advantages in terms of safety, durability, and aesthetics, but they also have disadvantages such as heavy weight, high foundation requirements, and relatively high prices. Therefore, designing a stone railing with a new material and new connection method that can address these issues has broad application prospects. Utility Model Content

[0007] The utility model aims to provide a bridge cast stone railing connected by grouting of columns, so as to solve the problems of excessive deadweight, bulky base and unstable installation of traditional stone railings.

[0008] The technical solution of the utility model is: a cast stone railing for a bridge connected by grouting of columns, comprising columns and railings, the columns being mounted on a base, a mounting groove being provided on the top of the base, a cavity being provided inside the columns, the bottom of the cavity being an open structure, the interior of the cavity and the mounting groove being integrally poured with concrete, and the concrete inside the cavity is not poured to the top of the columns.

[0009] As a further improvement of the present invention, the height of the concrete poured inside the cavity is at least 1 / 2 of the height of the column.

[0010] As a further improvement of the present invention, a base longitudinal steel bar is provided in the base, and a base bending steel bar is provided around the base longitudinal steel bar; a column embedded steel bar is provided in the column, and the column embedded steel bar is tied and fixed to the base longitudinal steel bar and the base bending steel bar.

[0011] As a further improvement of the present invention, a shear key is provided at the bottom of the installation notch.

[0012] As a further improvement of the present invention, a pouring port is provided on the top of the column, and concrete is poured through the pouring port.

[0013] The beneficial effects of the utility model are:

[0014] 1. The stone railing columns of this utility model adopt a cavity cast stone structure, which effectively reduces the deadweight of the stone railing, reduces the load on the bridge body, and has a favorable effect on the bridge structure.

[0015] 2. This utility model utilizes the method of pouring connection at the top of the column to cast the railing column and the base into one piece. Compared with the traditional "mortise and tenon connection", it has higher shear strength and bearing capacity, enhances the stability of the railing, and reduces the structural size of the base.

[0016] 3. The utility model increases the ductility and toughness of the column by arranging pre-embedded steel bars in the column, effectively brings into play the material properties of steel bars and cast stone, and fully utilizes the materials. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1This is a structural diagram of a cast stone railing for a bridge connected by grouting of columns in the utility model;

[0018] Figure 2 A schematic diagram of the cross-sectional structure of the column and base of the utility model;

[0019] Figure 3 It is a structural diagram of the installation notch in the utility model.

[0020] Figure 4 The utility model is a schematic diagram of the planar structure of a cast stone railing for a bridge connected by grouting of columns.

[0021] In the figure: 1-column; 11-cavity; 12-concrete; 13-embedded steel bars for column; 14-casting mouth; 2-base; 21-base longitudinal steel bars; 22-base bending steel bars; 23-grooving line; 24-shear key; 25-installation notch; 3-guardrail; 4-temporary pad. DETAILED DESCRIPTION

[0022] The present invention will be further described in detail below with reference to the accompanying drawings and specific implementation methods.

[0023] A cast stone bridge railing with column grouting connection includes a column 1 and a railing 3. The column 1 is installed on a base 2. The top of the base 2 is provided with a mounting notch 25 ( Figure 3 The dotted area in the figure is the installation slot 25). A through-length cavity 11 is provided inside the column 1. The bottom of the cavity 11 is an open structure. Concrete 12 is poured integrally inside the cavity 11 and the installation slot 25. The concrete 12 inside the cavity 11 is not poured to the top of the column 1.

[0024] The height of the poured concrete 12 inside the cavity 11 is at least 1 / 2 of the height of the column 1 .

[0025] The base 2 is provided with a base longitudinal steel bar 21, and the base bending steel bar 22 is provided around the base longitudinal steel bar 21; the column 1 is provided with a column embedded steel bar 13, and the column embedded steel bar 13 is tied and fixed to the base longitudinal steel bar 21 and the base bending steel bar 22.

[0026] A shear key 24 is provided at the bottom of the mounting notch 25 .

[0027] A pouring port 14 is provided on the top of the column 1 , through which concrete 12 is poured.

[0028] Example 1

[0029] In this embodiment, the concrete 12 is made of fine stone concrete.

[0030] The columns 1 and the balustrades 4 are prefabricated in the factory using cement, quartz sand, steel mesh and other materials in a certain proportion, and cast into shape through a mold (i.e., cast stone). Compared with natural stone, they have the advantages of long life, high plasticity and high strength.

[0031] The construction method is as follows:

[0032] A. For an existing base 2, design a slot line 23 on the upper portion of the base 2. Use a cutting machine and an electric drill to cut an installation slot 25 along the slot line 23 at the top of the base 2 and form a shear key 24. When cutting, be sure to preserve the base longitudinal reinforcement 21 and the base bending reinforcement 22. If the reinforcement is damaged, it can be restored to its original strength. After cutting, clean the installation slot 25. For a cast-in-place base 2, reserve the installation slot 25 and form the shear key 24 when casting the base 2.

[0033] B. Arrange the column embedded steel bars 13 at the installation notch 25 and tie them together with the base longitudinal steel bars 21 and the base bending steel bars 22;

[0034] C. Hoist the column 1 and guardrail 3 assembled in the factory, place the column 1 in the installation notch 25, ensure that the embedded steel bars 13 of the column are located inside the cavity 11 and the shear key 24 is in the predetermined position, and place the temporary pad 4 at the bottom of the guardrail 3 for support and positioning;

[0035] D. Install the formwork outside the installation notch 25, and pour concrete 12 into the cavity 11 and the installation notch 25 through the pouring port 14. Pour the concrete 12 to 1 / 2 of the height of the column 1. It is not necessary to pour it to the top of the column 1 to reduce the deadweight of the handrail 1 as much as possible. After the concrete 12 is vibrated and compacted, it is cured.

[0036] E. After the concrete 12 reaches the designed strength, remove the template outside the installation notch 25, remove the temporary pad 4, and seal the pouring port 14 with cement mortar.

[0037] The utility model constructs a cast stone railing for bridges with column grouting connection, which is convenient to construct, simple in structure, safe and reliable, and low in cost. While meeting the landscape requirements, it effectively solves the problems of traditional stone railings such as excessive deadweight, bulky foundation, and unstable installation.

Claims

1. A cast stone bridge railing with column grouting connection, comprising a column (1) and a railing (3), wherein the column (1) is mounted on a base (2), and is characterized in that: A mounting notch (25) is provided at the top of the base (2), a cavity (11) is provided inside the column (1), the bottom of the cavity (11) is an open structure, concrete (12) is cast inside the cavity (11) and the mounting notch (25) as a whole, and the concrete (12) inside the cavity (11) is not cast to the top of the column (1).

2. The cast stone bridge railing with column grouting connection according to claim 1, characterized in that: The height of the concrete (12) poured inside the cavity (11) is at least 1 / 2 of the height of the column (1).

3. A cast stone bridge railing with column grouting connection according to claim 1 or 2, characterized in that: The base (2) is provided with a base longitudinal steel bar (21), and the base bending steel bar (22) is provided on the periphery of the base longitudinal steel bar (21); the column (1) is provided with a column embedded steel bar (13), and the column embedded steel bar (13) is tied and fixed to the base longitudinal steel bar (21) and the base bending steel bar (22).

4. The cast stone bridge railing with column grouting connection according to claim 3, characterized in that: A shear key (24) is provided at the bottom of the mounting notch (25).

5. The cast stone bridge railing with column grouting connection according to claim 4, characterized in that: A pouring port (14) is provided on the top of the column (1), and concrete (12) is poured through the pouring port (14).

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