CN202830785U

CN202830785U - High pier bridge cantilever casting concrete 0 # block pier top bracket

Info

Publication number: CN202830785U
Application number: CN201220441251XU
Authority: CN
Inventors: 穆建廷; 雷军; 孙炜; 任晓琴; 渠茂涛
Original assignee: Second Engineering Co Ltd of China Railway 12th Bureau Group Co Ltd
Current assignee: Second Engineering Co Ltd of China Railway 12th Bureau Group Co Ltd
Priority date: 2012-09-02
Filing date: 2012-09-02
Publication date: 2013-03-27
Anticipated expiration: 2022-09-02

Abstract

The utility model relates to the field of bridge construction, in particular to a high pier bridge cantilever casting concrete 0 # block pier top bracket which solves the problems that installation of brackets is time-consuming and laborious, and appearance quality of pier bodies is influenced existing in the 0 # block construction. The pier top bracket comprises joist steel preformed holes, long joist steel and a triangular bracket. The long joist steel and the triangular bracket are arranged in the joist steel preformed holes in an inserted and penetrating mode. The triangular bracket comprises a group of embedded finish rolling deformed bar, a group of short joist steel and an inclined strut. One end of the short joist steel is welded with a connecting plate, and the short joist steel is fixed with a pier body surface through the connecting plate, nuts and the finish rolling deformed bar in an anchoring mode. A plain plate and a group of vertical steel plates are fixed below the short joist steel and at the lower end of the inclined strut, and the lower end of the inclined strut is connected with the plain plate in a hinged mode. Underbridge space is not occupied, dosage of materials small than that of a steel pipe support, other components can be recycled except the embedded finish rolling deformed bar, construction cost is greatly reduced, and inherence and the appearance quality of pier bodies are not largely influenced. The pier top bracket is simple in structure, convenient, easy to install and dismantle, and wide in application range.

Description

High pier bridge cantilever pouring concrete 0# piece pier jacking frame

Technical field

The utility model relates to field of bridge construction, is specially a kind of high pier bridge cantilever pouring concrete 0# piece pier jacking frame.

Background technology

During bridge construction, several method is arranged: the methods such as integral cast-in-situ, Hanging Basket cantilever, cantilever, integral prefabricated then lifting.When Hanging Basket cantilever and section assembling, all whole beam to be divided into some sections by length or presstressed reinforcing steel or rod member, piecemeal construction.That section at general pier shaft top is called 0# sections or 0# piece, numbers to span centre successively.The 0# piece is as the girder construction on Dun Ding top, the counter-force application point of Hanging Basket and the job platform that Hanging Basket is installed, when construction, must build at the rack platform with enough Rigidity and strengths, when pier shaft is low, generally adopt and set up scaffold or steel pipe frame as form bracing system from ground, employed timbering material is many; The general pier jacking frame that adopts when the high 50m of surpassing of pier shaft, traditional method is at present, pre-embedded steel slab when Operation on pier top, before the construction 0# piece, carrier member and pre-embedded steel slab are welded successively, after the construction of 0# piece is finished, again carrier member is cut off one by one, the carriage welded and installed, cut off and waste time and energy, and pre-embedded steel slab all has a strong impact on the external quality of pier quality, simultaneously overhead welding, cutting also increased security risk.

Summary of the invention

The utility model exists carriage to install, cut off the problem that wastes time and energy, affects pier shaft inherence and presentation quality in order to solve when existing high pier bridge 0# piece is constructed, and a kind of high pier bridge cantilever pouring concrete 0# piece pier jacking frame is provided.

The utility model is to adopt following technical scheme to realize: high pier bridge cantilever pouring concrete 0# piece pier jacking frame, comprise the i iron preformed hole that is disposed on top around the pier shaft and is symmetric in two opposing sidewalls of pier shaft, run through being inserted with long i iron in the i iron preformed hole that distributes symmetrically; Also comprise be separately positioned under the 0# piece web, the shelf bracket at pier shaft sidewall two ends parallel with the bridge center line, described shelf bracket comprises one group of fining twisted steel being embedded in the pier shaft, be arranged in parallel with long i iron and with the fixing one group short i iron in pier shaft surface and the upper end is connected with the weak point i iron, lower end and the surperficial diagonal brace of fixing of pier shaft, short i iron one end is welded to connect plate, and short i iron is solid by junction plate, nut, the fining twisted steel that is positioned at the junction plate two ends and pier shaft surface bolt; Short i iron below and diagonal brace lower end are fixed with a plain plate and are positioned at the plain plate below, are inserted in one group of vertical steel plate of pier shaft by the steel plate preformed hole, and diagonal brace lower end and plain plate are hinged.

The described junction plate back side is provided with the steel plate of putting more energy into short i iron welding, to increase short i iron and pier shaft anchoring strength.

On the described long i iron that is positioned at pier shaft one sidewall or long i iron and short i iron are added is provided with one group of i iron horizon bar, during construction, can the erection construction platform at four groups of i iron horizon bars that are positioned at around the pier shaft.

Adopt carrier structure described in the utility model, its intensity, rigidity and stability satisfy construction requirement, before the construction carriage is carried out preloading classification precompressed, the precompressed gross weight is 120% of case beam deadweight, with the safety of check carriage steel work, and eliminate the structure nonelastic deformation, draw the elastic deformation amount, in order to when formwork erection, control the bed die absolute altitude.

Compared with prior art, carriage described in the utility model does not take space under bridge, material is few than the steel pipe support consumption, and except pre-buried through rolling screw-thread steel, the equal reusable edible of other parts, greatly reduce construction cost, without considerable influence, features simple structure is easy to install, dismounting to pier shaft inherence and presentation quality, applied widely, have certain promotional value and use value.

Description of drawings

Fig. 1 is structural representation of the present utility model;

Fig. 2 is the lateral view of Fig. 1;

Fig. 3 is the enlarged drawing of A section among Fig. 2;

Among the figure: the 1-pier shaft; 2-i iron preformed hole; The long i iron of 3-; The 4-fining twisted steel; The short i iron of 5-; The 6-diagonal brace; The 7-junction plate; The 8-nut; The 9-plain plate; 10-steel plate preformed hole; 11-founds steel plate; The 12-steel plate of putting more energy into; 13-i iron horizon bar.

The specific embodiment

High pier bridge cantilever pouring concrete 0# piece pier jacking frame, as shown in Figure 1, 2, comprise the i iron preformed hole 2 that is disposed on top around the pier shaft 1 and is symmetric in two opposing sidewalls of pier shaft, hole size can be 125mm*260mm, run through being inserted with long i iron 3 in the i iron preformed hole that distributes symmetrically, can adopt 25 i iron; Also comprise and be separately positioned under the 0# piece web, the shelf bracket at the pier shaft sidewall two ends of parallel with the bridge center line (vertical bridge to), as shown in Figure 3, it is ￠ 32 that described shelf bracket comprises the one group of fining twisted steel 4(diameter that is embedded in the pier shaft), be arranged in parallel with long i iron and can adopt 45 i iron with the fixing one group short i iron 5(in pier shaft surface) and the upper end with lack i iron and be connected, the diagonal brace 6 that lower end and pier shaft surface are fixing, short i iron one end is welded to connect plate 7, junction plate 7 back sides are provided with the thick steel plate 12 of putting more energy into of 10mm with short i iron 5 welding, and short i iron passes through junction plate, nut 8, the fining twisted steel and the pier shaft surface bolt that are positioned at the junction plate two ends are solid; Short i iron below and diagonal brace lower end be fixed with a plain plate 9 and be positioned at the plain plate below, be 30mm*300mm*500mm by steel plate preformed hole 10(hole size) be inserted in a group of pier shaft and found steel plate 11, diagonal brace lower end and plain plate are hinged.Be positioned on the long i iron 3 of pier shaft one sidewall or long i iron 3 and short i iron 5 are added is provided with one group of i iron horizon bar 13, can adopt 25 i iron.

Case history:

Beijing-to-Shijiazhuang visitor specially stone too direct-through line stride 307 national highway bridge Beijing-to-Shijiazhuang Line for Passenger Transportation stones too direct-through line stride No. 4 piers of 307 national highway bridge (48+80+80+48) m continuous rigid frames (the high 61m of pier), No. 5 piers (the high 74m of pier), three T structure Dun Ding of No. 6 piers (the high 72m of pier) and adopt construction equipment construction described in the utility model, easy and simple to handle, construction safety is quick.Before the construction carriage has been carried out preloading classification precompressed, its intensity, rigidity and stability satisfy construction requirement.Adopt construction equipment described in the utility model, for the 0# piece is finished fast, launch rapidly to hang blue assembly unit and other beam section concretes of cantilever pouring create conditions, built, the consistent favorable comment of design, supervisor.

Claims

1. one kind high pier bridge cantilever pouring concrete 0# piece pier jacking frame, it is characterized in that comprising being disposed on pier shaft (1) all around top and the i iron preformed hole (2) that is symmetric in two opposing sidewalls of pier shaft, run through being inserted with long i iron (3) in the i iron preformed hole that distributes symmetrically; Also comprise be separately positioned under the 0# piece web, the shelf bracket at pier shaft sidewall two ends parallel with the bridge center line, described shelf bracket comprises one group of fining twisted steel (4) of being embedded in the pier shaft, be arranged in parallel with long i iron and be connected with the weak point i iron with fixing one group of short i iron (5) and upper end, pier shaft surface, lower end and the surperficial diagonal brace (6) of fixing of pier shaft, short i iron one end is welded to connect plate (7), and short i iron is solid by junction plate, nut (8), the fining twisted steel that is positioned at the junction plate two ends and pier shaft surface bolt; Short i iron below and diagonal brace lower end are fixed with a plain plate (9) and are positioned at the plain plate below, are inserted in a group of pier shaft by steel plate preformed hole (10) and found steel plate (11), and diagonal brace lower end and plain plate are hinged.

2. high pier bridge cantilever pouring concrete 0# piece pier jacking frame according to claim 1, its feature junction plate (7) back side are provided with and the steel plate of putting more energy into (12) of short i iron (5) welding.

3. high pier bridge cantilever pouring concrete 0# piece pier jacking frame according to claim 1 and 2 is characterized in that being positioned at the upper or long i iron (3) of the long i iron (3) of pier shaft one sidewall and lacks the added one group of i iron horizon bar (13) that is provided with of i iron (5).