A truss fixing mechanism on a bridge pier column

Abstract

The present invention discloses a truss fixing mechanism on a bridge pier column, which is used to fix the truss on both sides of the bridge pier column, and is characterized in that the truss fixing mechanism includes a mounting hole opened on the truss, a horizontal reserved through hole on the bridge pier column, and a pin rod passing through the mounting hole and the horizontal reserved through hole, and the two ends of the pin rod are respectively sleeved with support sleeves to form a support with the inner wall surface of the mounting hole and the inner wall surface of the horizontal reserved through hole, and the support sleeve extends from the mounting hole to the inside of the horizontal reserved through hole. The advantages of the present invention are: the combined structure of the pin rod and the support sleeve is used between the truss and the bridge pier column, which can effectively fix the truss on the bridge pier column, and can minimize the diameter and weight of the pin rod while meeting the bearing capacity requirements, thereby reducing the difficulty of installation.

Description

Technical Field

[0001] The invention belongs to the technical field of roads and bridges, and in particular relates to a truss fixing mechanism on a bridge pier column. Background Art

[0002] On-site pouring construction of urban bridges often requires road closure, long construction period, difficult to control construction quality, large consumption of supports and formworks during construction, high construction costs, which directly affects the road capacity of the construction site. In addition, the construction and transportation of concrete materials bring dust, noise and other pollution to the city, seriously affecting citizens' travel and quality of life, often causing great public grievances, which is incompatible with the requirements of urban construction and development.

[0003] Based on this, in order to shorten the construction period and reduce the impact on surrounding traffic and residents' lives, prefabricated cap beams are increasingly used in the construction of urban bridges. Compared with on-site cast cap beams, prefabricated cap beams have the advantages of scalable prefabrication, easy transportation and installation, and are widely used in the field of bridge construction.

[0004] Before erecting the prefabricated cap beam, it is necessary to install a fixed truss structure on the pier column. The more commonly used structure is to open a through hole on the pier column and set a pin in the through hole to fix the truss on the pier column. However, the entire set of pins has the problem of heavy weight and high cost, which makes it difficult to install. Summary of the invention

[0005] The object of the present invention is to provide a truss fixing mechanism on a bridge pier column in view of the deficiencies of the above-mentioned prior art. The truss fixing mechanism is configured to have support sleeves respectively sleeved on both ends of the pin rod, thereby greatly reducing the diameter and weight of the pin rod while meeting the bearing capacity requirements, thereby reducing the difficulty of installing the pin rod.

[0006] The purpose of the present invention is achieved by the following technical solutions:

[0007] A truss fixing mechanism on a pier column, used for fixing the truss to both sides of the pier column, characterized in that the truss fixing mechanism comprises a mounting hole opened on the truss, a horizontal reserved through hole on the pier column, and a pin rod passing through the mounting hole and the horizontal reserved through hole, the two ends of the pin rod are respectively provided with support sleeves to closely adhere to the inner wall surface of the mounting hole and the inner wall surface of the horizontal reserved through hole to form support, and the support sleeve extends from the mounting hole to the horizontal reserved through hole.

[0008] The extension length L of the support sleeve in the horizontal reserved through hole of the pier column is 2-3 times of the outer diameter d of the support sleeve, that is, 2d<L<3d.

[0009] The outer wall surface of the supporting sleeve is provided with a circle of flanges, and the flanges are clamped between the pier column and the truss.

[0010] The truss is provided with a fixing sleeve, which includes a flange and a sleeve connected to each other. The fixing sleeve is sleeved on the exposed end of the supporting sleeve through the sleeve and is fixedly connected to the truss through the flange.

[0011] The outer end of the pin rod protrudes from the fixing sleeve, and a nut is arranged on the outer end of the pin rod and is screwed against the fixing sleeve to fix the pin rod.

[0012] The advantages of the present invention are: a combined structure of pin rods and supporting sleeves is used between the truss and the pier column, which can effectively fix the truss on the pier column and can minimize the diameter and weight of the pin rods while meeting the bearing capacity requirements, thereby reducing the difficulty of installation. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the truss in the present invention being fixed on the bridge pier column via a fixing mechanism;

[0014] Figure 2 For the present invention Figure 1 AA section view in;

[0015] Figure 3 For the present invention Figure 2 A one-side local enlarged schematic diagram;

[0016] Figure 4 For the present invention Figure 1 A partial enlarged schematic diagram in B. DETAILED DESCRIPTION

[0017] The features of the present invention and other related features are further described in detail below through embodiments in conjunction with the accompanying drawings to facilitate understanding by those skilled in the art:

[0018] like Figure 1-4 The marks in the figure are: truss 1, pier column 2, prefabricated cap beam 3, truss fixing mechanism 4, pin rod 5, support sleeve 6, fixing sleeve 7, nut 8, horizontal reserved hole 9, installation hole 10, flange 11.

[0019] Example: Figure 1 , 2As shown in Figures 3 and 4, the present embodiment specifically relates to a truss fixing mechanism on a pier column, wherein the truss fixing mechanism 4 is used to fix the truss 1 on the pier column 2, and the truss fixing mechanism 4 comprises a mounting hole 10 provided on the truss 1, a horizontal reserved hole 9 provided on the pier column, and a pin rod 5 passing through the mounting hole 10 and the horizontal reserved hole 9, and both ends of the pin rod 5 are respectively provided with support sleeves 6 to closely adhere to the inner wall surface of the mounting hole 10 and the inner wall surface of the horizontal reserved hole 9 to form support, and each support sleeve 6 extends from the mounting hole 10 to the horizontal reserved hole 9.

[0020] like Figure 1 , 2 As shown in Figures 3 and 4, the pier column 2 in this embodiment is used to set up the prefabricated cap beam 3, and the trusses 1 on both sides of the pier column 1 are used to guide and support the prefabricated cap beam 3 during the construction process. Figure 1 and 4 As shown, two sets of truss fixing mechanisms 4 are provided on each bridge pier column 2 , so as to secure the truss 1 on the bridge pier column 2 .

[0021] like Figure 2 , 3 As shown, the mounting hole 10 on the truss 1 corresponds to the horizontal reserved hole 9 on the pier column 2, and the apertures of the two are the same; the diameter of the pin rod 5 is smaller than the apertures of the horizontal reserved hole 9 and the mounting hole 10, and the pin rod 5 passes through the mounting hole 10 on the truss 1 on one side, the horizontal reserved hole 9 on the pier column 2, and the mounting hole 10 on the truss 1 on the other side in sequence, and support sleeves 6 are sleeved on both ends of the pin rod 5. The outer diameter of the support sleeve 6 corresponds to the apertures of the horizontal reserved hole 9 and the mounting hole 10. Therefore, after the support sleeves 6 are sleeved on both ends of the pin rod 5, the support sleeves 6 can be made to fit closely to the inner wall surfaces of the mounting hole 10 and the inner wall surfaces of the horizontal reserved hole 9, so as to form a supporting force. The middle part of the support sleeve 6 is provided with a circle of flange 11 to divide the support sleeve 6 into two parts in the length direction. One part extends into the horizontal reserved hole 9 of the pier column 2 during installation, and the other part is arranged in the installation hole 10 of the truss 1 during installation. The circle of flange 11 is sandwiched between the inner wall surface of the truss 1 and the outer wall surface of the pier column 2, thereby playing a role in fixing and limiting the support sleeve 6. It should be further explained that the extension length L of the support sleeve 6 in the horizontal reserved hole 9 is 2-3 times the outer diameter d of the support sleeve 6, that is, 2d<L<3d. The selection of the above extension length L can make the mechanical properties of the combination of the support sleeve 6 and the pin rod 5 reach the mechanical properties of the pin rod 5 with the same diameter d.

[0022] like Figure 2 , 3As shown, the outer end of the supporting sleeve 6 slightly protrudes from the truss 1, and a fixing sleeve 7 is provided on the truss 1 corresponding to each supporting sleeve 6. The fixing sleeve 7 includes a flange and a sleeve connected to each other. The sleeve is specifically sleeved on the exposed end of the supporting sleeve 6, and the flange is fixedly connected to the truss 1 by bolts; the outer end of the pin rod 5 protrudes from the fixing sleeve 7, and nuts are respectively sleeved on both ends of the pin rod 5 and tightened against the fixing sleeve to fix the pin rod 5.

[0023] like Figure 1-4 As shown, the installation method of the truss fixing mechanism in this embodiment includes the following steps:

[0024] (1) inserting the support sleeve 6 into each horizontal reserved hole 9 of the pier column 2, so that the front half of the support sleeve 6 extends into the horizontal reserved hole 9, and the flange 11 on the support sleeve 6 is closely arranged on the outer wall surface of the pier column 1;

[0025] (2) Align the mounting holes 10 on the truss 1 with the supporting sleeves 6 and insert them into each other to place the truss 1 on the supporting sleeves 6;

[0026] (3) The pin rod 5 is installed by passing through the support sleeve 6 on one side, the horizontal reserved hole 9 and the support sleeve 6 on the other side in sequence. After installation in place, a fixing sleeve 7 is sleeved on the outer side of the truss 1 and fixed with bolts; a nut is set on the outer end of the pin rod 5 and tightened against the fixing sleeve 7 to fix the pin rod 5.

Claims

1. A truss fixing mechanism on a bridge pier column, used to fix the truss on both sides of the bridge pier column, characterized in that The truss fixing mechanism comprises a mounting hole opened on the truss, a horizontal reserved through hole on the pier column, and a pin rod passing through the mounting hole and the horizontal reserved through hole, and the two ends of the pin rod are respectively sleeved with support sleeves to closely contact with the inner wall surface of the mounting hole and the inner wall surface of the horizontal reserved through hole to form support, and the support sleeve extends from the mounting hole to the horizontal reserved through hole; The extension length L of the support sleeve in the horizontal reserved through hole of the pier column is 2-3 times the outer diameter d of the support sleeve, that is, 2d<L<3d; The outer wall surface of the supporting sleeve is provided with a circle of flange, and the flange is clamped between the pier column and the truss; the truss is provided with a fixing sleeve, and the fixing sleeve includes a flange and a sleeve connected to each other, and the fixing sleeve is sleeved on the exposed end of the supporting sleeve through the sleeve, and is fixedly connected to the truss through the flange; the outer end of the pin rod protrudes from the fixing sleeve, and a nut is provided on the outer end of the pin rod and tightened against the fixing sleeve to fix the pin rod.

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