CN215164750U

CN215164750U - Arch beam cross installation construction support for half-through tied steel box arch bridge

Info

Publication number: CN215164750U
Application number: CN202120923450.3U
Authority: CN
Inventors: 吴瑞; 蒋德林; 王安文; 薛飞
Original assignee: Road and Bridge International Co Ltd
Current assignee: Road and Bridge International Co Ltd
Priority date: 2021-04-29
Filing date: 2021-04-29
Publication date: 2021-12-14
Anticipated expiration: 2031-04-29

Abstract

The utility model relates to a well formula tie rod steel case arched bridge arched girder cross arrangement construction support of holding, including bridge floor installing support and arch rib installing support, the bridge floor installing support includes steel-pipe pile down, and the lower extreme of lower steel-pipe pile is inserted and is beaten certain degree of depth under the ground, and the upper end cross bridge of lower steel-pipe pile is to having set up the spandrel girder, and the arch rib installing support includes steel-pipe pile, goes up steel-pipe pile's lower extreme and the upper end welding of lower steel-pipe pile, and goes up steel-pipe pile and steel-pipe pile's axle center down on same straight line. The utility model discloses be as an organic whole with arch rib installing support and bridge floor installing support connection, the support basis is and inserts the pile foundation, and stability is good, and the load that the arch rib support bore directly transmits to ground, has avoided the permanent structure of bridge floor to participate in the arch rib work progress atress, can guarantee construction safety to can improve the efficiency of construction.

Description

Arch beam cross installation construction support for half-through tied steel box arch bridge

Technical Field

The utility model belongs to bridge construction field relates to a well bear formula tie rod steel case arched bridge's construction, concretely relates to a support that is used for well bear formula tie rod steel case arched bridge to adopt arched girder cross installation construction.

Background

The main structural system of the half-through tied steel box arch bridge comprises an arch support, tie bars (tie beams), a bridge deck system and arch ribs, wherein the tie bars, the bridge deck system and the arch ribs are all processed in a factory in a segmented mode and transported to be installed on site, and a steel pipe pile support needs to be erected during on-site installation. The existing construction method is to set up a bridge deck mounting bracket first, finish the beam and bridge deck system after the installation, then set up an arch rib mounting bracket on the bridge deck, and carry out the arch rib installation.

In the existing construction method, a bridge deck mounting support and an arch rib mounting support are two independent systems, the lower end of a steel pipe pile of the bridge deck mounting support is driven into the soil, and the load borne by the steel pipe pile is directly transmitted to the ground; the lower end of the arch rib mounting support is supported on the bridge floor, and the load borne by the arch rib mounting support is transmitted to the bridge floor mounting support through the bridge floor and finally transmitted to the ground. There are the following problems:

(1) the bridge deck permanent structure after installation participates in the stress of the arch rib installation construction process, which easily causes uncertain risks such as local deformation and downwarping of the bridge deck;

(2) if the lower end of the steel pipe pile of the arch rib mounting bracket is directly supported on the bridge floor, the stability is poor; if the steel pipe pile is welded with the bridge deck, welding damage can be caused to the bridge deck, and the steel pipe pile and the bridge deck need to be cut and separated when the support is dismantled, so that the bridge deck is further damaged;

(3) after the construction is finished, when the bridge deck mounting support is dismantled, due to the blocking of the bridge deck, the part entering the soil can be upwards pulled out after the steel pipe pile is cut, and the dismantling speed is slow.

Disclosure of Invention

The utility model aims at the above-mentioned problem, provide one kind and be used for the alternately installation construction method of half-through tied bar steel case arched bridge arched girder, guarantee construction safety, avoid haring the bridge floor to accelerate the construction progress.

The technical scheme of the utility model as follows:

the utility model provides a well formula tie rod steel case arched bridge arched girder alternately installs construction support, includes bridge floor installing support and arch rib installing support, the bridge floor installing support includes steel-pipe pile down, and the lower extreme of lower steel-pipe pile is inserted and is beaten certain degree of depth under the ground, and the upper end cross bridge of lower steel-pipe pile is to having set up the spandrel girder, arch rib installing support includes steel-pipe pile, its characterized in that: a bayonet is formed in the upper end of the lower steel pipe pile, the bearing beam is erected in the bayonet, and the top surface of the bearing beam is flush with the top surface of the lower steel pipe pile; the lower end of the upper steel pipe pile is welded with the upper end of the lower steel pipe pile, and the axes of the upper steel pipe pile and the lower steel pipe pile are on the same straight line.

The arch rib mounting support and the bridge deck mounting support are connected into a whole, the support foundation is a pile inserting foundation, the stability is good, and the safety of the support is improved; the load borne by the arch rib support is directly transmitted to the ground, so that the stress of the bridge deck permanent structure participating in the construction process is avoided, and uncertain risk factors such as bridge deck deformation are avoided; when the support is dismantled, the steel pipe pile can be directly pulled out, and the construction efficiency is improved.

Drawings

FIG. 1 is a schematic view of a transverse bridge structure of the present invention;

FIG. 2 is a schematic view of the forward bridge structure of the present invention;

FIG. 3 is a schematic cross-bridge direction view of a connection structure of an arch rib mounting bracket steel pipe pile and a bridge deck mounting bracket steel pipe pile;

FIG. 4 is a schematic view of a connection structure of an arch rib mounting bracket steel pipe pile and a bridge deck mounting bracket steel pipe pile along the bridge direction.

Detailed Description

As shown in fig. 1, 2, 3 and 4, the utility model comprises a bridge deck mounting support and an arch rib mounting support, wherein the bridge deck mounting support comprises a lower steel pipe pile 1, the lower end of the lower steel pipe pile is inserted into the ground to a certain depth, a bearing beam 2 is transversely bridged at the upper end of the lower steel pipe pile, a bayonet 3 is arranged at the upper end of the lower steel pipe pile, the bearing beam is erected in the bayonet, and the top surface of the bearing beam is flush with the top surface of the lower steel pipe pile; the arch rib installing support comprises an upper steel pipe pile 4, the lower end of the upper steel pipe pile 4 is welded with the upper end of a lower steel pipe pile 1, and the axle centers of the upper steel pipe pile 4 and the lower steel pipe pile 1 are on the same straight line.

The utility model discloses during the concrete implementation, for guaranteeing that steel-pipe pile and lower steel-pipe pile welding are firm, at the peripheral vertical welding polylith stiffening plate 5 of the seam of upper and lower steel-pipe pile.

Adopt the utility model discloses when carrying out the bridge floor and the arch rib erection construction of zhongcheng formula tie rod steel box arched bridge, can be according to the order construction of installation tie beam → installation part bridge floor system → installation arch rib → installation surplus bridge floor system, roof beam, arch cross construction promptly, concrete process is as follows:

(1) firstly, a bridge deck mounting bracket is erected. The lower end of the lower steel pipe pile 1 is driven into the ground to a certain depth, and then a bearing beam 2 is erected on the lower steel pipe pile. The bayonet 3 is arranged at the upper end of the lower steel pipe pile in advance, the two ends of the bearing beam 2 are transversely installed in the bayonet in a bridging mode, the top surface of the bearing beam is flush with the top surface of the lower steel pipe pile, and the upper steel pipe pile and the lower steel pipe pile are welded and welded conveniently when an arch rib installing support is erected subsequently.

(2) Installing a tie beam 6 on the bearing beam along the bridge direction, installing a bridge deck system 7 on the tie beam along the transverse bridge direction after the tie beam is installed, wherein the bridge deck system positioned at the top of the bridge deck installation support is not installed firstly when the bridge deck system is installed, and a free space is reserved, so that an arch rib installation support can be conveniently installed on the bridge deck installation support in subsequent construction;

(3) and erecting an arch rib mounting bracket on the bridge deck mounting bracket. And welding the lower end of the upper steel pipe pile 4 with the upper end of the lower steel pipe pile 1. And ensure that the axes of the upper steel pipe pile and the lower steel pipe pile are on the same line. And the stiffening plates 5 are welded at the peripheries of the welding seams of the upper and lower steel pipe piles.

(4) The rib 8 is mounted on the rib mounting bracket.

(5) And after the arch rib is installed, firstly removing the arch rib installing support, cutting and separating the upper steel pipe pile and the lower steel pipe pile during removal, then removing the bearing beam, and upwards pulling out the lower steel pipe pile by utilizing the free space of the bridge deck system.

(6) And after the supports are completely dismantled, the bridge deck system load is completely borne by the tie beams, and the rest bridge deck system is installed at the previous support building position to complete the installation construction of the bridge deck system and the arch ribs of the through tied steel box arch bridge.

Claims

1. The utility model provides a well formula tie rod steel case arched bridge arched girder alternately installs construction support, includes bridge floor installing support and arch rib installing support, the bridge floor installing support includes steel-pipe pile down, and the lower extreme of lower steel-pipe pile is inserted and is beaten certain degree of depth under the ground, and the upper end cross bridge of lower steel-pipe pile is to having set up the spandrel girder, arch rib installing support includes steel-pipe pile, its characterized in that: a bayonet is formed in the upper end of the lower steel pipe pile, the bearing beam is erected in the bayonet, and the top surface of the bearing beam is flush with the top surface of the lower steel pipe pile; the lower end of the upper steel pipe pile is welded with the upper end of the lower steel pipe pile, and the axes of the upper steel pipe pile and the lower steel pipe pile are on the same straight line.

2. The cross-mounting construction bracket for arched girders of a half-through tied steel box arch bridge according to claim 1, characterized in that: and a plurality of stiffening plates are vertically welded on the periphery of the joint of the upper steel pipe pile and the lower steel pipe pile.