CN207537870U

CN207537870U - A kind of precast beam unit of cantilevered shape of a hoof bent cap

Info

Publication number: CN207537870U
Application number: CN201721280583.3U
Authority: CN
Inventors: 姚玲玲; 陈猛; 李凯章; 毛登峰; 白冰; 霍省伟; 赵洁; 王雪; 于文静; 李长军; 禹沛; 谷艳蕊
Original assignee: Zhengzhou Communications Planning Survey & Design Institute
Current assignee: Zhengzhou Transportation Planning Survey Design And Research Institute Co ltd
Priority date: 2017-09-30
Filing date: 2017-09-30
Publication date: 2018-06-26
Anticipated expiration: 2027-09-30

Abstract

The utility model is related to a kind of precast beam units of cantilevered shape of a hoof bent cap, precast beam unit is the beam of horseshoe-shaped structure, it is provided with that surrounding is totally enclosed to pour groove on beam, the bottom middle position of beam is equipped with service sleeve, tensioning has first prestressed strand on beam, and the perforation installed for second batch prestressed strand is arranged on the side wall of the opposite end of the beam.Realize the construction production of shape of a hoof bent cap, efficiency is higher, cost is relatively low, live hauling operation is simple.

Description

A kind of precast beam unit of cantilevered shape of a hoof bent cap

Technical field

The utility model is related to a kind of precast beam units of cantilevered shape of a hoof bent cap.

Background technology

With the construction of modern city, municipal works also rapidly develop therewith, and the requirement to construction quality and efficiency is got over Come higher, the traffic impact brought therewith is also increasingly severe.It is generally constructed for cantilevered bent cap using prefabrication and lifting, still Due to the features such as its weight is big and the component scale of construction is big, the requirement to lifting machine and Transport Machinery is high, while to operation side It is also higher with the requirement of the accuracy of lifting positioning, it is affected to traffic, therefore inconvenient and efficiency of constructing is low.The prior art In have using erection construction bent cap stent at the scene, Coping Construction template on stent is installed, is poured in external mold later Concrete, and carry out curing concrete to design strength, then completes installation by external mold, stent dismounting, but this applies Work technique needs manually to carry out the installation of external mold, erection construction stent, this results in the effect of production in practical operating process Rate is relatively low, and construction quality is not easy to ensure, and cost is higher, and live hauling operation is more numerous and diverse, is brought centainly to work progress Influence.

Utility model content

The purpose of this utility model is to provide a kind of precast beam unit of cantilevered shape of a hoof bent cap, to solve existing skill Less efficient during cantilevered Coping Construction in art, the problem of cost is higher, live hauling operation is more numerous and diverse.

To achieve the above object, the precast beam unit technical solution of the cantilevered shape of a hoof bent cap of the utility model is：

Scheme 1：The precast beam unit of cantilevered shape of a hoof bent cap, the precast beam unit are the beam of horseshoe-shaped structure, It is provided with that surrounding is totally enclosed to pour groove on beam, the bottom middle position of beam is equipped with service sleeve, beam structure Tensioning has first prestressed strand on part, is disposed on the side wall of the opposite end of the beam for second batch prestress steel The perforation that beam installs.

Scheme 2：On the basis of scheme 1, the cross section for pouring groove of the precast beam unit is trapezoidal.

Scheme 3：On the basis of scheme 1 or 2, the height in the centre position of the prestressed strand in the precast beam unit Higher than the height at both ends.

Scheme 4：On the basis of scheme 1 or 2, first prestressed strand has at least 6, wherein one end of beam At least eight is perforated on side wall.

The beneficial effects of the utility model are：Compared with the prior art, the cantilevered shape of a hoof involved by the utility model The prefabricated shape of a hoof beam of bent cap is conducive to the quality control of integral construction and actual effect control；Prefabricated shape of a hoof component exists Place maintenance a period of time is stored in before erection, so as to reduce the contraction of concrete after assembling Cheng Liang and creep； Requirement to Transport Machinery and lifting machine is relatively low, and less Site Template machine is cast with the protection conducive to environment；Meanwhile Larger mobility is provided on working procedure, it is positive that the transport hub and other congested areas to urban district protect road to have Meaning, and construction team's surrounding enviroment and traffic above-ground influence are small, and construction period is shorter, rapid recovery traffic pressure；Make at scene Industry amount is few, quick construction, technically simple maturation, conducive to popularization.The construction production of cantilevered shape of a hoof bent cap can be achieved, improve The precision of bent cap assembly, the requirement to operation side is little, convenient, fast.

Description of the drawings

Fig. 1 is the structure diagram of the precast beam unit of the cantilevered shape of a hoof bent cap of the utility model；

Fig. 2 is the positional structure schematic diagram of the six steel Shu Zhangla of end of precast beam unit in Fig. 1；

Fig. 3 is the positional structure schematic diagram of the six steel Shu Zhangla of centre position of precast beam unit in Fig. 1；

Fig. 4 is the schematic diagram of positional structure of the six steel beams of tensioning in Fig. 1 in precast beam unit；

Fig. 5 is the precast beam unit of the utility model and the assembling structure schematic diagram of column；

Fig. 6 is the dimensional structure diagram after the precast beam unit of the utility model pours；

Fig. 7 is the positional structure schematic diagram of eight steel Shu Zhangla of the end of precast beam unit in Fig. 6；

Fig. 8 is the positional structure schematic diagram of the eight steel Shu Zhangla in the centre position of precast beam ditch part in Fig. 6；

Fig. 9 is the schematic diagram of positional structure of the eight steel beams of tensioning in Fig. 6 in precast beam unit.

Specific embodiment

The embodiment of the utility model is described further below in conjunction with the accompanying drawings.

The embodiment one of the precast beam unit of the cantilevered shape of a hoof bent cap of the utility model, as shown in Fig. 1 ~ 4, as rear The bed die of continuous stage entirety erection without scaffolding and the precast beam unit of side form, structure are in the shape of a hoof, and bottom has for two simultaneously The support portion that bridge pier 7 is integrally supported is arranged, while service sleeve 2 is installed at support portion, in the present embodiment, in beam 1 Portion pours groove 5 as trapezium structure, this trapezium structure pour groove 5 enable to horseshoe-shaped beam 1 itself Weight reaches most light, ensures the convenient of subsequent lifting, and tensioning is gone back on the beam 1 of horseshoe-shaped structure 6 steel beams, after being Continuous prestressed stretch-draw reserving hole channel.

When producing cantilevered shape of a hoof bent cap, generally poured and in the gradually tensioning of each stage using prefabricated in batches The mode of steel beam carries out the whole erection without scaffolding of cantilevered shape of a hoof bent cap, specifically includes following four step：

Step（1）：As shown in Fig. 1 ~ 4：Using precast beam unit as the bed die of follow-up phase entirety erection without scaffolding and Side form, the precast beam unit are horseshoe-shaped beam 1, and beam 1 is equipped with that surrounding is totally enclosed pours groove 5, pours recessed Slot 5 is trapezoidal groove, while installs service sleeve 2 in the bottom of beam middle position corresponding with bridge pier, for supplying bridge The reinforcing bar 6 reserved on pier passes through, and enhances the load bearing stength of bent cap.6 prestressed strand F1 ~ F3 of tensioning on beam is formed Steel beam hole 3, the prestressed stretch-draw reserving hole channel for follow-up phase.

Step（2）：As shown in figure 5, above-mentioned beam 1 is moved to 7 top of bridge pier, and the steel that will be reserved on bridge pier 7 Muscle 6 passes through service sleeve 2 and stretches to and pour in groove 5, and beam 1 is lifted on bridge pier 7.

Step（3）：As shown in Fig. 6 ~ 9, using the hollow space for pouring groove 5 of 8 cast-in-place beam of fill concrete, together When accordingly length pour 8 prestressed strand F4 ~ F5. of tensioning in groove 5

Step（4）：It is conserved, the whole erection without scaffolding of cantilevered shape of a hoof bent cap is completed.

In particular, it should be pointed out that the cantilevered shape of a hoof bent cap is molded using one-time-concreting, therefore it is four to pour groove 5 Thorough closed pockets, final one-time-concreting is in place；Simultaneously as the structure stress feature of cantilevered shape of a hoof bent cap, in tensioning During steel beam 4, the position height among steel beam 4 ensures the knot of bent cap higher than tensioning is carried out by the way of the position height at both ends Structure stress and structure reactance meet stress needs.

In other embodiments, the structure for pouring groove 5 can be other structures, such as U-shaped, V-arrangement.

In other embodiments, the quantity of the tensioning steel beam in each stage can increase or decrease according to the actual needs.

In other embodiments, the stretching mode of steel beam can be replaced by other modes, need to ensure the cantilevered shape of a hoof The intensity of the final structure of each position of bent cap reaches requirement.

Claims

1. a kind of precast beam unit of cantilevered shape of a hoof bent cap, it is characterised in that：The precast beam unit is horseshoe-shaped structure Beam, is provided with that surrounding is totally enclosed to pour groove on beam, and the bottom middle position of beam is equipped with pre-buried set Pipe, on beam tensioning have first prestressed strand, be arranged on the side wall of the opposite end of the beam for second Criticize the perforation that prestressed strand installs.

2. the precast beam unit of cantilevered shape of a hoof bent cap according to claim 1, it is characterised in that：The precast beam structure The cross section for pouring groove of part is trapezoidal.

3. the precast beam unit of cantilevered shape of a hoof bent cap according to claim 1 or 2, it is characterised in that：It is described prefabricated The height in the centre position of the prestressed strand in beam is higher than the height at both ends.

4. the precast beam unit of cantilevered shape of a hoof bent cap according to claim 1 or 2, it is characterised in that：First is pre- Stress steel beam has at least 6, and at least eight is perforated on the side wall of wherein one end of beam.