CN103711071B - Elevated section structure for straddle monorail - Google Patents

Abstract

The invention relates to the field of bridges, in particular to an elevated section structure for a straddle-type monorail, characterized in that: the pier column is a reinforced concrete pier column, the top of the pier column is provided with a box-type embedded part, and the box-type There are reserved short columns on the embedded part; the beam is a prefabricated steel beam, and installation holes are reserved at the corresponding installation positions of the lower flanges at both ends of the box-type embedded part, and the beam body of the beam A reserved cavity is provided above, wherein the installation hole fits with the reserved short column to form a mating connection so that the beam is fixedly connected to the pier column. The invention has the advantages of: while ensuring the construction quality of the steel beam, shortening the construction period, reducing the impact on the ground traffic and eliminating the potential safety hazards caused by the construction of the full support in the road; solving the anchoring installation problem of the tension support of the monorail traffic , high installation precision, good support effect.

Description

Elevated section structure for straddle monorail

technical field

The invention relates to the field of bridges, in particular to an elevated section structure for a straddle monorail.

Background technique

The straddle-type monorail transit elevated line needs to be equipped with a door-shaped pier structure when the roadside is converted to each other in the middle of the road, the line spacing is large, and there are multiple lines. The general method is to use prestressed concrete structure door-shaped pier beams and full hall brackets for construction. When steel structures are used, the tension supports supporting monorail traffic are directly welded to the steel components. However, the above-mentioned methods have obvious disadvantages. Full support has a great impact on ground road traffic and has potential safety hazards; secondly, since the tension support is a complex system, the installation accuracy requirements are relatively high, and it is difficult to meet the accuracy requirements by direct welding. Traffic lines pose safety hazards.

Contents of the invention

The object of the present invention is to provide an elevated section structure for straddle-type monorail according to the deficiencies of the above-mentioned prior art. The prefabricated steel beams are hoisted on the concrete piers and then poured into one body, which not only shortens the construction period, but also reduces the impact on the ground. The impact of traffic and the elimination of potential safety hazards caused by the construction of the full house support in the road; at the same time, the anchor box of the tension support and the reserved cavity of the prefabricated steel beam are poured into one body, so that the installation accuracy and support strength are guaranteed.

The object of the present invention is realized by the following technical solutions:

An elevated section structure for straddle-type monorail, comprising a beam and a pier column, the beam is fixedly supported by the pier columns on both sides thereof, characterized in that: the pier column is a reinforced concrete pier column, and the pier column There is a box-type embedded part on the top of the column, and there are reserved short columns on the box-type embedded part; Mounting holes are reserved respectively, and a reserved cavity is provided above the beam body of the beam, wherein the mounting holes are fitted with the reserved short columns to form a mating connection so that the beam is fixedly connected to the pier column.

A tensile support anchor box for supporting the monorail is arranged in the reserved cavity.

The box-type embedded part is composed of several coamings, and the coaming is welded and fixed with the reserved main reinforcement of the pier column. The inside of the box-type embedded part is a concrete pouring body, and the box-type embedded part and The mounting holes are bolted and fixed.

An integral structure is formed between the concrete pouring body inside the box-type embedded part and the pier column.

An integrated structure is formed by pouring concrete between the reserved cavity and the support anchor box for fixing the tension support.

The invention has the advantages of: while ensuring the construction quality of the steel beam, the construction period is shortened, the impact on the ground traffic is reduced, and the potential safety hazards caused by the construction of the full hall support in the road are eliminated; the anchorage of the tensile support of the monorail traffic track beam is solved Installation problem, high installation accuracy, good support effect.

Description of drawings

Fig. 1 is a structural representation of the present invention;

Fig. 2 is the connection structure diagram of pier column and crossbeam in the present invention;

Fig. 3 is the connecting structure diagram of beam and tension support in the present invention;

Fig. 4 is the elevation view of beam in the present invention;

Fig. 5 is the bottom view of Fig. 4;

Fig. 6 is a sectional view of Fig. 4;

Fig. 7 is the elevation view of pier column in the present invention;

Fig. 8 is a plan view of the top of the pier column in the present invention;

Fig. 9 is a transverse sectional view of Fig. 8;

FIG. 10 is a longitudinal sectional view of FIG. 8 .

Detailed ways

The features of the present invention and other related features will be further described in detail below in conjunction with the accompanying drawings through embodiments, so as to facilitate the understanding of those skilled in the art:

As shown in Figure 1-10, the numbers 1-20 in the figure are: pier column 1, beam 2, tension support 3, reserved short column 4, post-cast concrete for beam 5, post-cast concrete for pier column 6, vertical Coaming plate 7, bolt 8, anchor bar 9, post-cast concrete in the cavity 10, reserved cavity 11, installation hole 12, pier main reinforcement 13, bolt hole 14, horizontal plate 15, support plate 16, connecting plate 17, lower wing plate 18. Box type embedded parts 19, support anchor box 20.

Embodiment: As shown in Figure 1, the elevated section structure for straddle-type monorail in this embodiment is composed of a door-shaped structure composed of pier columns 1 and beams 2, wherein the beam 2 is fixedly supported by pier columns 1 located at its two ends , two tension supports 3 are fixedly installed above the beam 2, and each tension support 3 supports a monorail track beam respectively.

As shown in Figures 9 and 10, the pier column 1 is a concrete pier column, and a vertically upward box-type embedded part 19 is arranged on the top of the column. There is a reserved short column 4 on the box-type embedded part 19. The short column 4 is used as the connection part with the beam 2, and a connecting plate 17 is arranged on its periphery, and the bolt hole 14 is opened on the connecting plate 17; as shown in Figure 4-6, the beam 2 is a prefabricated steel beam, and the lower wings on both sides Mounting holes 12 are respectively reserved at the corresponding installation positions of the plate 18 and the reserved short column 4, and the lower flanges 18 on both sides of the mounting hole 12 are respectively provided with bolt holes matching the positions of the bolt holes 14; as shown in Figure 2 As shown, the installation holes 12 are fitted with the corresponding reserved short columns 4 on both sides, so that a fixed connection is formed between the beam 2 and the pier column 1, and the lower flange 18 on the beam 2 and the horizontal coaming plate 15 on the pier column 1 The fastening connection is formed by bolts 8, and the beam 2 and the pier column 1 form an integrated structure by pouring the beam and then pouring the concrete 5. While ensuring the support force of the pier column 1 to the beam 2, it realizes the method of factory prefabrication and on-site hoisting The construction of the elevated section structure not only shortens the construction period, but also reduces the impact on the ground traffic and eliminates the safety hazards caused by the construction of the full hall support in the road.

As shown in Figures 4 and 5, two reserved cavities 11 are provided above the prefabricated crossbeam 2, and the reserved cavities 11 are respectively used as installation positions for tension supports 3 supporting two monorail traffic lines. As shown in Figure 3, a number of horizontally arranged anchor bars 9 are buried in the reserved cavity 11 so that the reserved cavity 11 forms a support anchor box 20, and the tension support 3 is positioned in the support anchor box 20 before pouring the cavity Concrete 10 is poured back inside the body, so that the tension support 3 and the support anchor box 20 are integrated. While ensuring the installation accuracy requirements of the tension support 3, the supporting effect of the beam 2 on the tension support 3 is also strengthened.

As shown in Figure 7-10, a box-type embedded part 19 is provided on the periphery of the reserved short column 4 at the top of the pier column 1. The box-type embedded part 19 functions as a positioning support for the reserved short column 4, and it The role of forming an integral body with the pier column 1. The box-type embedded part 19 is composed of a vertical coaming plate 7, a horizontal plate 15 and a supporting plate 16, wherein the vertical coaming plate 7 is arranged around the circumference direction of the column top of the pier column 1 and is respectively connected with the reserved space on the pier column 1. The main reinforcement 13 of the bridge pier is fixed, and the vertical coaming plate 7 forms the pouring area of the post-poured concrete 6 on the top of the pier column 1; It is welded and fixed with the vertical coaming plate 7, and its upper surface is fixedly connected to support the reserved short column 4; the horizontal plate 15 encapsulates the upper opening of the semi-enclosed area formed by the vertical coaming plate 7, because the height of the reserved short column 4 is greater than the vertical The height of the shroud 7, so the coverage of the horizontal plate 15 boards is from the upper edge of the vertical shroud 7 to the column of the reserved short column 4. The pouring area in the hoarding structure consisting of the vertical hoarding 7 , the horizontal slab 15 and the support slab 16 is filled with the post-cast concrete 6 of the piers to realize the phase fixation between the reserved piers 4 and the piers 1 .

When this embodiment is actually implemented: the vertical coaming 7 around the pre-embedded pier 4 is first welded with the main reinforcement 13 of the pier, and then the remaining coamings are welded, and after calibration, concrete is poured to complete the installation of the pre-embedded pier 4 .

Hoist the crossbeam 2 processed in the factory in advance. When erecting, the lower flange mounting holes 12 at both ends of the steel crossbeam 2 are directly set on the reserved short column 4 at the top of the pier column 1, and the bolts 8 at the beam end are tightened for temporary positioning.

During installation, the beam 2 and the pier column 1 are not fixed. After the track beam and other second-stage dead load constructions are completed, it will be converted into a rigid connection. This method reduces the bending moment at the top of the pier column and improves the structural stress.

Weld the anchor bar 9 in the reserved cavity 11 on the beam 2, hoist the tension support 3, and pour the concrete 10 in the cavity after calibration.

Claims (4)

1. An elevated section structure for straddling monorail, comprising a beam and a pier column, the beam is fixedly supported by the pier columns on both sides thereof, it is characterized in that: the pier column is a reinforced concrete pier column, the The top of the pier column is provided with a box-type embedded part, and the box-type embedded part has a reserved short column; the beam is a prefabricated steel beam, and the corresponding installation Installation holes are reserved at the positions respectively, and a reserved cavity is provided above the beam body of the beam, wherein the installation holes are fitted with the reserved short columns and form a mating connection so that the beams and the pier columns are fixed connection, a tension support for supporting the monorail track beam is arranged in the reserved cavity. 2. The elevated section structure for straddle-type monorail according to claim 1, characterized in that: the box-type embedded parts are composed of several coaming panels, and the coaming panels and the pier columns are reserved The main reinforcement is welded and fixed, the inside of the box-type embedded part is a concrete pouring body, and the box-type embedded part is connected and fixed with the bolts in the installation holes. 3. The elevated section structure for straddle-type monorail according to claim 2, characterized in that: the concrete pouring bodies inside the box-type embedded parts and the pier columns form an integrated structure. 4. The elevated section structure for straddle-type monorail according to claim 1, characterized in that an integral structure is formed by pouring concrete between the reserved cavity and the support anchor box for fixing the tension support .