CN205296844U

CN205296844U - Precast box girder steel strand wires hoisting point

Info

Publication number: CN205296844U
Application number: CN201620061005.XU
Authority: CN
Inventors: 陈晖�; 张义龙; 龙亮; 黄卫东; 崔伟; 张荣桓; 刘琳; 王丁; 王丁一; 蒋欢; 赵士杰
Original assignee: Shanghai Civil Engineering Co Ltd of CREC; First Engineering Co Ltd of Shanghai Civil Engineering Co Ltd of CREC
Current assignee: Shanghai Civil Engineering Co Ltd of CREC; First Engineering Co Ltd of Shanghai Civil Engineering Co Ltd of CREC
Priority date: 2016-01-21
Filing date: 2016-01-21
Publication date: 2016-06-08
Anticipated expiration: 2026-01-21

Abstract

The utility model discloses a precast box girder steel strand wires hoisting point, characterized by: pre -buried steel stranded conductor in precast box girder forms each rings by steel strand wires on the settlement position of case back board, utilize each rings to hoist precast box girder to many steel strand wires are restrainted for a set of steel strand wires that parallel into, and the formation rings of bending at the middle part are restrainted to steel strand wires. The utility model discloses rational in infrastructure, the atress is even, makes the case roof beam steadily hoist, has avoided the case roof beam to take place off -centre and the run -off the straight, operation safe and reliable.

Description

Prefabricated case beam steel strand hang a little

Technical field

The utility model relates to a kind of steel strand and hangs a little, and the steel strand being more specifically applied in case beam to implement case beam lifting operation hang a little.

Background technology

In prior art, still adopting traditional embracing to hang mode for case beam lifting operation, there is following deficiency in this kind of mode:

One, wireline when playing box beam not only under tension effect be also subject to shear action, add the infringement to wireline, decrease the work-ing life of wireline, add the use cost of wireline;

Two, in case beam hoisting process, wireline is for case beam base plate and web junction, and produces squeezing action at the two ends of flange plate, it is possible to make corresponding position concrete break under the effect of racking stress or the infringements such as crack occur;

Three, the use length of wireline is excessive, is not easy to the carrying out of the inspection work before lifting operation;

Four, when employing is embraced and hung, wireline is not easy to install, and adds artificial labour cost;

Five, in case beam lifting operation process, due to the factor such as center of gravity skew of case beam, case beam can tilt because of eccentric action, adds unsafe factor in case beam lifting operation.

Practical novel content

The utility model is for avoiding the deficiency existing for above-mentioned prior art, a kind of prefabricated case beam steel strand are provided to hang a little, to ensure that case beam removes the stability of process in lifting, case beam is steadily lifted, case beam is avoided to tilt because of eccentric, reduce unsafe factor in anti-collision wall construction, reduce the construction cost of lifting operation, it is to increase working efficiency.

The utility model is that technical solution problem adopts following technical scheme:

The utility model prefabricated case beam steel strand hang constructional feature a little: bury steel strand in prefabricated case beam in advance, form each suspension ring by described steel strand on the desired location of case back plate, utilize described each suspension ring to be lifted by described prefabricated case beam.

The utility model prefabricated case beam steel strand hang constructional feature a little and are also:

Becoming steel wire bundle taking many steel strand side by side as one group, described steel wire bundle forms described suspension ring in middle part bending.

Being respectively arranged with strongback at the two ends of described steel wire bundle, the pilot hole that in described steel wire bundle, each steel strand run through corresponding on described strongback respectively at two ends obtains location.

Described steel wire bundle and the common colligation of steel bar framework of box beam, and with case beam with pre-formed altogether.

Described suspension ring have everywhere, divide and are on the position at four angles of case back plate.

Compared with the prior art, the useful effect of the utility model is embodied in:

1, the utility model is rational in infrastructure, uniform force, and case beam is steadily lifted, and avoids case beam and occurs eccentric and tilt;

2, the utility model effectively avoids case beam wireline in hoisting process and, to the concrete infringement of box beam flange plate, case beam is served good provide protection;

3, the utility model adopts the form hung a little, and wireline, without the need to encircling case beam, avoids the infringement to wireline, extends the work-ing life of wireline; Also shortening the use length of wireline simultaneously, thus reduce the use cost of wireline, it is easy to install, and reduces cost of labor;

Accompanying drawing explanation

Fig. 1 is that the utility model raising middle flask beam steel strand hang a plot plan;

Fig. 2 hangs a position case beam section structure schematic diagram in the utility model;

Fig. 3 is steel strand suspender schematic diagram in the utility model;

Fig. 4 is the fixing colligation schematic diagram of the utility model steel strand suspender and case beam reinforcing bar;

Number in the figure: 1 prefabricated case beam, 2 steel strand, 3 suspension ring, 4 strongbacks, 5 steel bar framework of box beam.

Embodiment

See Fig. 1, Fig. 2, Fig. 3 and Fig. 4, in the present embodiment, prefabricated case beam steel strand hang structure formation a little and are: bury steel strand 2 in prefabricated case beam 1 in advance, on the desired location of case back plate, form each suspension ring 3 by steel strand 2, utilize each suspension ring 3 to be lifted by prefabricated case beam 1.

In concrete enforcement, as shown in Figure 3, becoming steel wire bundle taking many steel strand 2 side by side as one group, steel wire bundle forms suspension ring 3 in middle part bending; It is respectively arranged with strongback 4 at the two ends of steel wire bundle, the pilot hole that in steel wire bundle, each steel strand run through corresponding on strongback 4 respectively at two ends obtains location, as shown in Figure 4, steel wire bundle and the common colligation of steel bar framework of box beam 5, and with case beam with pre-formed altogether.

Shown in Fig. 1, in the present embodiment, suspension ring 3 have everywhere, divide and are on the position at four angles of case back plate, its uniform force.

The selection of steel strand should be considered: the tensile strength of every root steel strand reaches 1860MP, and its comprehensive breaking force should meet the regulation of GB GB1200 88; The test-results of its maximum load, elongation, Yield Load and relaxation rate should meet the regulation of GB GB/T5224 1995; Its tensile test is undertaken by GB GB228 87, and its torsion test is undertaken by GB239 84, and relaxation test is undertaken by GB GB10120 88.

In the utility model, to hang a tensile strength big for steel strand, rational in infrastructure, it is easy to install, steel strand suspension ring become an entirety with prefabricated box-beam, planimetric position connection and reasonable arrangement, uniform force, it is possible to ensure that case beam can steadily be advanced when lifting operation, avoids occurring eccentric and causing case beam to tilt in hoisting process.

The utility model decreases the use length of wireline, is easier to install, decreases artificial use cost, facilitate the inspection work to wireline before case beam lifting operation.

Claims

1. prefabricated case beam steel strand hang a little, it is characterized in that: in prefabricated case beam (1), bury steel strand (2) in advance, on the desired location of case back plate, form each suspension ring (3) by described steel strand (2), utilize described each suspension ring (3) to be lifted by described prefabricated case beam (1).

2. prefabricated case beam steel strand according to claim 1 hang a little, it is characterized in that: become steel wire bundle taking many steel strand (2) side by side as one group, and described steel wire bundle forms described suspension ring (3) in middle part bending.

3. prefabricated case beam steel strand according to claim 2 hang a little, it is characterized in that: be respectively arranged with strongback (4) at the two ends of described steel wire bundle, in described steel wire bundle, each steel strand run through described strongback (4) upper corresponding pilot hole acquisition location respectively at two ends.

4. prefabricated case beam steel strand according to claim 2 hang a little, it is characterized in that: described steel wire bundle and the common colligation of steel bar framework of box beam (5), and with case beam with pre-formed altogether.

5. prefabricated case beam steel strand according to claim 1 hang a little, it is characterized in that: described suspension ring (3) have everywhere, divide and are on the position at four angles of case back plate.