CN201661074U

CN201661074U - Integral twitch-type steel-cored mould

Info

Publication number: CN201661074U
Application number: CN2009201099875U
Authority: CN
Inventors: 蔡新宁; 田庆梅; 杨卫平
Original assignee: CCCC First Highway Engineering Co Ltd
Current assignee: CCCC First Highway Engineering Co Ltd
Priority date: 2009-07-13
Filing date: 2009-07-13
Publication date: 2010-12-01
Anticipated expiration: 2019-07-13

Abstract

The utility model adopts an integral twitch-type steel-cored mould, which comprises a core mould top plate, a core mould web plate and a core mould motherboard. Two sets of connecting devices are vertically and symmetrically arranged on a plane which is parallel to the core mould top plate and the core mould motherboard. At the same time, the corners of the core mould top plate and the core mould web plate and the center of the core mould motherboard are provided with three rotating bearings. Each set of connecting devices are formed by connecting a longitudinal U-steel and a plurality of transverse armor plates which are symmetrical about the longitudinal U-steel. Each two transverse armor plates on one line are connected through two contraction rotating shafts and a central rotating shaft which is arranged between the two contraction rotating shafts. Each central rotating shaft is fixed on the longitudinal U-steel. The outer side of each transverse armor plate is connected with a contraction template which tightly fits the inner surface of the core mould web plate. The longitudinal U-steel is vertical to the core mould top plate. The utility model can not damage top plate concrete, ensure that a core mould can be drawn out in time and the turnover times of the core mould, and improve economic benefits.

Description

Whole twitch formula steel core mould

Technical field

The utility model relates to a kind of post stretching precast hollow plate-girder that is mainly used in, and is a kind of whole twitch formula steel core mould specifically.

Background technology

It is several that the spanning of highway hollow slab beam is generally 13m, 16m, 20m etc. at present.Because it has advantages such as thin thickness, in light weight, quick construction, cost are low, be widely used in common road and speedway grade separation without ramps and general in foot bridge.To adopting the hollowcore slab of post-tensioned construction, at present, its traditional construction technology mainly contains following several:

1, reel mould

Hollowcore slab pore-forming technique early adopts the reel mould, wraps plastic sheeting at itself and concrete surface side, because the concrete hydrating heat effect, film temperature distortion, concrete extrusion die plate, form removal be difficulty very, and labor strength is big, it is many to expend timber, the construction cost height.

2, whole vacuolar membrane core

Along with the appearance of high-strength lightweight material,, there is the people once to imagine and adopts integral plastics vacuolar membrane core in order to solve the difficult problem that core is removed, because in light weight, disposable use, forever stay in the hollowcore slab, feasible on this technology, but cost is too high, should not adopt in a large number.

3, combination steel core mould

Adopt 3mm steel sheet processing combined steel, its physical dimension accurately, good rigidity, pore-forming overall size can reach designing requirement, the template number of turnover is many, but the workman is drilled in a large amount of template of piece dismounting in the very little space, and its poor working environment, operation are very difficult, efficiency is very low.

4, aerated capsule core

In recent years core generally adopts the moulding of autocratic inflating rubber capsule, for guaranteeing the accurate of capsule position, is not the capsule come-up, establishes stirrup together for per 50 centimetres by every capsule of designing requirement usually, and its lower end is provided with a horizontal bar, and the stirrup bottom is connected and fixed with horizontal bar.Have advantages such as easy construction, easy operating, quick construction, better economic benefit but also have many deficiencies.

1. the time of core extraction is difficult to control, extracts too early, and concrete sinking slump makes hollowcore slab form the crack, even the cavity; Spend evening, concrete setting causes core and concrete binding, is difficult to extract.

2. capsule is pulled out in the process, concrete and capsule bonding, and it is inevitable to pull concrete, influences the concrete inherent quality.

Therefore, be necessary to provide a kind of novel core, overcome the defective in the above-mentioned pre existing making sheet beam construction.

The utility model content

Technical problem to be solved in the utility model is, a kind of whole twitch formula steel core mould is provided, its not only can guarantee hollow slab beam physical dimension, build the quality of concrete, and assembling is simple, form removal is convenient.

Overall pulling down formula steel core mould, it is characterized in that: comprise core top board 8, core web 9, core base plate 10, be parallel to upper and lower symmetrical two set of connection devices are installed on the plane of core top board and core base plate, in the corner and the core base plate center of core top board and core web three place's rolling bearings are set simultaneously; Many the horizontal steel plates 3 that described every set of connection devices adopts a vertical channel-section steel 1 to reach about vertical channel-section steel symmetric arrangement interconnect composition, per two horizontal steel plates point-blank shrink turning cylinder 4 by two and two center rotating shafts 5 that shrink between the turning cylinder connect, and each center rotating shaft is fixed on vertical channel-section steel 1; Every horizontal steel plate outside connects shrinks template 2, shrinks template 2 and core web 9 inner surfaces and closely cooperates.

Utilize said structure of the present utility model, whole twitch formula steel core mould of the present utility model is because rolling bearing is installed in core top board and web junction, play rotary action, and finishing upper back web template in concreting inwardly shrinks, after contraction was finished, the web upper mould can separate with the bottom template.

The utility model is exempted concrete roof is damaged, and guarantees that core can extract out in time, guarantees the core number of turnover, increases economic efficiency.

Description of drawings

Fig. 1 plate-girder central sill of the present utility model schematic diagram;

Fig. 2 overall pulling down formula of the present utility model steel core mould rotation system floor map;

Fig. 3 overall pulling down formula of the present utility model steel core mode structure schematic diagram;

Figure before Fig. 4 a overall pulling down formula of the present utility model steel core module dress;

Fig. 4 b overall pulling down formula of the present utility model steel core module dress back figure.

The specific embodiment

Shown in Fig. 1～4, the utility model adopts overall pulling down formula steel core mould to comprise core top board 8, core web 9, core base plate 10, be parallel on the plane of core top board and core base plate upper and lower symmetry two set of connection devices are installed, in the corner and the core base plate center of core top board and core web three place's rolling bearings are set simultaneously; Many the horizontal steel plates 3 that described every set of connection devices adopts a vertical channel-section steel 1 to reach about vertical channel-section steel symmetric arrangement interconnect composition, per two horizontal steel plates point-blank shrink turning cylinder 4 by two and two center rotating shafts 5 that shrink between the turning cylinder connect, and each center rotating shaft is fixed on vertical channel-section steel 1; Every horizontal steel plate outside connects shrinks template 2, shrinks template 2 and core web 9 inner surfaces and closely cooperates.

In the utility model, as shown in Figure 2, the effect of center rotating shaft 5 is to guarantee the connection punching block steel plate 3 and the contraction turning cylinder 4 of both sides are connected, and guarantees that template hauls out smoothly; The effect that turning cylinder 4 is shunk in both sides is to guarantee in center rotating shaft 5 outside stretch-draw the contraction template 2 of both sides, web top to be shunk to the center.

In the utility model, as shown in Figure 2, in the template construct process, pay special attention to the angle at web template top and lower joint place, this angle must satisfy the top web and upwards pressure concrete roof not being produced when shrink at the center, exempts that concrete roof is damaged, and guarantees that core can extract out in time, guarantee the core number of turnover, increase economic efficiency.

In the utility model, as shown in Figure 3, increase a pair of easy contraction rolling bearing 7 at the top board of core and the corner of web.Its effect is that core top board and web junction can be rotated, and finishes after-contraction template 2 in concreting and can inwardly shrink, and after contraction was finished, web top was shunk template 2 and can be separated with the bottom template.

In the utility model, because in the hollowcore slab design drawing, beam-ends bar construction form generally is designed to whole circle sealing reinforcing bar, the colligation before core is installed of all reinforcing bars finishes.Therefore we are optimized design to the whole circle sealing reinforcing bar in 2 meters scopes of beam-ends, to put in order circle sealing reinforcing bar and be divided into two sections, promptly make " U " reinforcing bar of two sections couplings, and joining place is up and down strengthened, meet design requirement to guarantee construction quality at the web place.The installation of whole reinforcing bar was divided into for two steps to be carried out, and constructs according to the program of colligation base plate, web reinforcement → build underplate concrete → installation core → colligation top board reinforcing bar, has so just solved the core installation question.

In the utility model, 8～10 hours begin to remove core after concreting is finished, and only need artificial jack or the small winch of cooperating can easily extract the steel core mould out, and the dismounting time of whole core is only used 30 minutes.After form removable was finished, in time the concrete thickness to base plate and top board detected, by a plurality of points of cloth on base plate and top board are detected, and the thickness that testing result meets design requirement fully, and corner angle are clearly demarcated, the concrete apparent mass is good.

The foregoing description is a specific embodiment of the present utility model, only is used to illustrate the utility model, but not is used to limit the utility model.

Claims

1. overall pulling down formula steel core mould, it is characterized in that: comprise core top board, core web, core base plate, be parallel on the plane of core top board and core base plate symmetry upper and lower two set of connection devices are installed, in the corner and the core base plate center of core top board and core web three place's rolling bearings are set simultaneously; Many the horizontal steel plates that described every set of connection devices adopts a vertical channel-section steel to reach about vertical channel-section steel symmetric arrangement interconnect composition, per two horizontal steel plates point-blank shrink turning cylinder by two and two center rotating shafts that shrink between the turning cylinder connect, and each center rotating shaft is fixed on vertical channel-section steel; Every horizontal steel plate outside connects shrinks template, shrinks template and core web inner surface and closely cooperates.