CN202164545U

CN202164545U - Vertical prestressing pore canal communicating pipes and mud-jacking pipes

Info

Publication number: CN202164545U
Application number: CN2011202652355U
Authority: CN
Inventors: 王海良; 任权昌; 董鹏; 杨新磊
Original assignee: Tianjin Urban Construction College
Current assignee: Tianjin Urban Construction College
Priority date: 2011-07-26
Filing date: 2011-07-26
Publication date: 2012-03-14
Anticipated expiration: 2021-07-26

Abstract

Vertical prestressing pore canal communicating pipes and mud-jacking pipes belong to the technical field of road and bridge construction. The vertical prestressing pore canal communicating pipes and the mud-jacking pipes are characterized in that twisted steel penetrates into a thin-wall steel pipe, two ports of the thin-wall steel pipe are fixedly sealed through an upper nut and a lower nut, horizontal communicating pipes are arranged on the lower portion of the thin-wall steel pipe, inclined mud-jacking pipes or mud discharging pipes are arranged on the upper portion of the thin-wall steel pipe, and the communicating pipes are matched with connecting sleeves in an inserted mode so as to enable the communicating pipes to be communicated in a sealing mode. The vertical prestressing pore canal communicating pipes and the mud-jacking pipes have the advantages of greatly quickening installing speed of vertical prestressing rebar, enabling adjacent assemblies to be integrally communicated through the communicating pipes, enabling all the vertical prestressing pore canal mud jacking to be performed on a bridge surface, reducing construction difficulty, improving construction quality and speed and enabling vacuum mud jacking of a vertical prestressing pore canal to be possible.

Description

Vertical prestressing force opening UNICOM madjack pipe

Technical field

The utility model belongs to the construction of road and bridge technical field.

Background technology

In the construction of long span bridge girder construction; Often in the case web, vertical prestressing bar is set; Along with requiring increasingly high to mud jacking compactness in the duct; Now the duct all requires vacuum grouting in the bridge construction, because that vertical prestressing force opening is provided with is more, and its squeezing quality influences durability of structures.

At present, in the construction of long span bridge beam vertical prestressing force opening mud jacking, traditional vertical prestressing force opening is employed in the interior bottom of case beam madjack pipe is set; In fluid concrete, dismounting, in the mold process, be easy to damage the mud jacking provided pipe, because the existence of mud jacking preformed hole; Internal mold processing, installation have been increased very big difficulty, and caused spillage in the vertical prestressing force opening bottom easily, in the bridge construction of a lot of employing conventional methods construction; A lot of vertical prestressing force openings bottom is arranged can not utilize the provided pipe mud jacking because spillage stops up the duct, having to influences squeezing quality at top, duct redrilling mud jacking; Possibly not realize the vacuum grouting of vertical prestressing force opening; If adopt horizontal double vertical prestressing bar in the web, later stage boring difficulty is bigger, in the long span bridge girder construction; The spacing of vertical prestressing bar is generally about 50cm; Arrange that quantity is quite big, adopt reliable, easy vertical prestressing force opening mud jacking technology, to improving speed of application, guaranteeing that the bridge construction durability is very necessary.

Summary of the invention

The purpose of the utility model is: a kind of vertical prestressing force opening UNICOM madjack pipe is provided, and it can realize vacuum grouting effectively, improves mud jacking, installation, dismounting internal mold speed of application, has improved the bridge engineering quality.

The technical scheme of the utility model is: indented bars passes in the thin-wall steel tube; the thin-wall steel tube two-port is through top nut and lower nut sealing and fixing; be provided with the cross over pipe of level in the thin-wall steel tube bottom; top is provided with the madjack pipe or the outlet pipe of inclination, and each cross over pipe inserts with splicing sleeve and cooperates, and makes airtight connection between each cross over pipe.

The beneficial effect of the utility model is: the smart bundle of vertical prestressing twisted steel, thin-wall steel tube, last madjack pipe (outlet pipe), cross over pipe are processed assembly at the reinforcing bar processing space, accelerated the installation rate of vertical prestressing bar greatly;

Adjacent component is connected to integral body through cross over pipe; And utilize the 22# iron wire to be fixed together; Form the mud jacking cross over pipe, all vertical prestressing force opening mud jackings are all carried out at bridge floor, reduced difficulty of construction; Improved construction quality and speed, and made the vertical prestressing force opening vacuum grouting become possibility.

Description of drawings

Fig. 1 is the utility model structure chart.

The specific embodiment

Below in conjunction with accompanying drawing the utility model is done and to be further described:

As shown in the figure, the 1st, indented bars, the 2nd, thin-wall steel tube, the 3rd, top nut, the 4th, lower nut, the 5th, cross over pipe, the 6th, madjack pipe, the 7th, outlet pipe, the 8th, splicing sleeve, the 9th, concrete or plastic cushion, the 10th, iron wire.

Utilize thin-wall steel tube smart pulp (or mud jacking) pipe of pricking indented bars 1, thin-wall steel tube 2, cross over pipe 5, lower nut 4, top nut 3, top of vertical prestressing to be connected into black box at the reinforcing bar processing space; After case web reinforcing bar binding is accomplished; Assembly is placed in design attitude; Smart indented bars 1 bottom of pricking of vertical prestressing is supported with cushion block 9, makes the smart indented bars 1 of pricking have enough protective layer thickness, and assembly is fixed on the web reinforcement skeleton; Cross over pipe 5 between adjacent component inserts respectively in the bigger splicing sleeve 8; Cross over pipe and splicing sleeve 8 gap at joint positions twine the jail with adhesive tape, for preventing the coupling part to be ripped when the fluid concrete, with 22# iron wire 10 adjacent assembly are connected one.

Concrete pouring finish reach the stretch-draw of designing requirement intensity after, can on bridge floor, carry out the mud jacking of vertical prestressing force opening, be pressed into from an assembly madjack pipe 6 during mud jacking; From another assembly outlet pipe 7 pulps; Cement paste gets into its bottom from an assembly steel pipe top, gets into another assembly steel pipe bottom through cross over pipe 5, is emerged by its top; Whole mud jacking process is all carried out on bridge floor; In box girder inner formwork installation, unloading process, can not occur owing in each bottom, duct the construction inconvenience that madjack pipe causes is set by conventional method, mud jacking, installation, dismounting internal mold speed of application can improve greatly; And squeezing quality can be guaranteed, and makes vertical prestressing force opening adopt vacuum grouting to become possibility.

Claims

1. vertical prestressing force opening UNICOM madjack pipe; Comprise indented bars, it is characterized in that: indented bars passes in the thin-wall steel tube, and the thin-wall steel tube two-port is through top nut and lower nut sealing and fixing; Be provided with the cross over pipe of level in the thin-wall steel tube bottom; Top is provided with the madjack pipe or the outlet pipe of inclination, and each cross over pipe inserts with splicing sleeve and cooperates, and makes airtight connection between each cross over pipe.