CN217175790U

CN217175790U - Concrete pouring anti-segregation flexible string barrel

Info

Publication number: CN217175790U
Application number: CN202220816183.4U
Authority: CN
Inventors: 卢冠楠; 刘丹娜; 肖向荣; 宋海山; 石兆斌; 雷领; 赖引民; 邵文泽
Original assignee: Road and Bridge International Co Ltd
Current assignee: Road and Bridge International Co Ltd
Priority date: 2022-04-11
Filing date: 2022-04-11
Publication date: 2022-08-12
Anticipated expiration: 2032-04-11

Abstract

The utility model relates to a concrete placement prevents flexible string section of thick bamboo that educes, including at least two string section of thick bamboo units of connecting from top to bottom, every string section of thick bamboo unit includes barrel and flange, the barrel is the funnel-shaped structure that upper circle is flat under adopting flexible rubber materials to make, and its first section cross section is circular, and the lower half is flat mouth, and the inner wall of double-phase offside is laminated each other, and its apical pore is equipped with the annular turn-ups of turning over a certain width of turning over outward, the flange includes upper flange and lower flange, and upper flange presses the turn-ups top surface at the barrel, and lower flange cover is on the barrel and near the turn-ups bottom surface, passes through bolted connection and presss from both sides the turn-ups with turn-ups between upper flange and lower flange and fix; the flanges of the upper and lower string cylinder units are connected through a rigging or a suspender. The utility model discloses make the concrete flow under a confined state, can not take place to educe.

Description

Concrete pouring anti-segregation flexible string barrel

Technical Field

The utility model belongs to the construction field relates to the construction of pouring of concrete, concretely relates to prevent to pour flexible cluster section of thick bamboo of in-process concrete segregation.

Background

Concrete segregation refers to the phenomenon of non-uniform internal composition and structure due to the separation of concrete mixture components. When a large concrete structure is poured, when the free falling height of concrete exceeds two meters, segregation occurs. The occurrence of segregation can greatly reduce the strength and the bearing capacity of the concrete structural member and influence the safety of the concrete structural member; meanwhile, the concrete structural member has poor appearance effect, and is easy to have sand marks, exposed aggregates, exposed reinforcing steel bars and the like, so that the durability of the concrete structure is influenced. Therefore, when the pouring height of the concrete structural member exceeds two meters, the vertical pouring usually adopts a guide pipe, a string barrel or a chute to convey, the effects of gathering and condensing, preventing dispersion and buffering the concrete are achieved, and the concrete is prevented from being segregated to a certain degree.

In the existing anti-segregation technology, a guide pipe and a string barrel are of a cylindrical structure rolled by a thin steel plate, the lengths of sections are 1.0-2.0 m, the sections are connected by adopting bolt threads or steel bar rings, and the guide pipe or the string barrel is dismantled section by section along with the rising of a concrete pouring surface so as to keep the distance between the bottom opening of the guide pipe or the string barrel and the concrete surface to be less than 2 m.

The concrete chute is better in the aspect of preventing the segregation, but because the chute needs certain angle can guarantee that the concrete flows by oneself in the chute by the dead weight, in order to adjust the chute angle, often need set up reliable and stable chute support, increased casting cost and support and set up the high altitude construction risk, in addition, the opening position of chute is fixed, the in-mould distribution of concrete is also limited, therefore its applicable place is very a bit, the less shallow foundation ditch plain concrete of mainly used area pours.

When the concrete pouring fall is not large, the string barrel and the guide pipe can play a certain anti-segregation effect, but when the pouring fall is large, because the volume weights of broken stones, mortar and cement paste in the concrete mixture are different and the friction resistance of the string barrel wall is different, the free landing speed can be different after a certain distance, and segregation is inevitable. In some engineering constructions, such as underground structures like large deep foundation pits, the vertical falling height of concrete can reach more than 10m, and in some cases 40m, the segregation phenomenon is more prominent, and if no segregation prevention measures or improper measures are taken, the pouring quality of the concrete is greatly influenced.

At present, two main solutions for solving the problem of large-drop concrete pouring segregation are provided in China, one is to arrange an elbow at the bottom opening of a serial cylinder or a conduit so as to prevent the speed of concrete entering a mold, but the method has the problems that the concrete at the elbow is already segregated, so that the segregation prevention effect cannot be well achieved, and the condition of pipe blockage at the elbow can be frequently caused; the other method is that a gate valve structure is arranged at one or more positions in the middle of a conduit or a string cylinder, the free landing height of concrete is limited in sections, the method has the problems that the gate valve cannot be freely opened and closed due to the adhesion of cement paste, the later pouring is influenced, and the gate valve is a machined part, so that the general weight is heavy, the operation of workers is difficult during installation and disassembly, the cleaning is time-consuming and labor-consuming, and the popularization and application effects are poor.

Disclosure of Invention

The utility model aims at the above-mentioned problem, provide a flexible string section of thick bamboo structure that educes when simple structure, convenient to use and can effectively prevent big drop concrete placement.

The technical scheme of the utility model as follows:

the utility model provides a concrete placement prevents flexible cluster section of thick bamboo of educing, includes at least two string section of thick bamboo units of connecting from top to bottom, its characterized in that: each cylinder string unit comprises a cylinder body and a flange, the cylinder body is of a funnel-shaped structure which is made of flexible rubber materials and is round at the upper part and flat at the lower part, the cross section of the upper half part of the cylinder body is round, the lower half part of the cylinder body is a flat mouth, the inner walls of the two opposite sides are mutually attached, the top opening of the cylinder body is provided with an annular flange which is outwards turned over for a certain width, the flange comprises an upper flange and a lower flange, the upper flange is pressed on the top surface of the flange of the cylinder body, the lower flange is sleeved on the cylinder body and is close to the bottom surface of the flange, and the upper flange is connected with the lower flange through bolts and clamps and fixes the flange; the flanges of the upper and lower string cylinder units are connected through a rigging or a suspender.

Compared with the prior art, the utility model, following beneficial effect has:

1. the cylinder body of the string cylinder of the utility model is a flat nozzle-shaped funnel structure and is made of rubber, when a certain amount of concrete enters the upper part of the cylinder body, the lower flat nozzle part is automatically and gradually propped open under the extrusion of the dead weight of the concrete, and the concrete slowly flows down from the propped flat nozzle by the dead weight; after the concrete flows through, the flat cylinder body recovers, the whole flowing process of the concrete flows in a restrained state, and the concrete does not have the states of dispersion and free falling and cannot be segregated.

2. The suspender with different diameters, which can bear the dead weight of the concrete in the string cylinder and the cylinder, can be continuously lengthened to any length, and is suitable for concrete pouring with any drop.

3. The flexible rubber material has light dead weight, low cost, convenient installation, disassembly and cleaning, smooth inner wall which is not easy to be bonded with concrete, and no pipe clamping and blocking phenomena in the concrete pouring process.

Drawings

Fig. 1 is a schematic side view of the present invention;

FIG. 2 is an exploded view of a tandem unit;

FIG. 3 is a schematic front view of a tandem unit;

FIG. 4 is a schematic side view of a tandem unit;

FIG. 5 is a schematic view of the initial state of the cast concrete of the present invention;

FIG. 6 is a schematic view showing a state where concrete is dropped from the upper cylinder to the lower cylinder;

FIG. 7 is a schematic view showing a state after concrete in the upper string casing completely flows out;

fig. 8 is a schematic view of the continuous casting of concrete according to the present invention.

Detailed Description

As shown in fig. 1, fig. 2, fig. 3, and fig. 4, the present invention includes at least two series cylinder units connected up and down, each series cylinder unit includes a cylinder 1 and a flange 2, the cylinder 1 is a funnel-shaped structure made of flexible rubber material with a round top and a flat bottom, the cross section of the upper half is round, the lower half is a flat mouth, and the inner walls of the two opposite sides are mutually attached, the top opening is provided with an annular flange 11 turning outwards for a certain width, the flange 2 includes an upper flange 21 and a lower flange 22, the upper flange 21 is pressed on the top surface of the flange 11 of the cylinder, the lower flange 22 is sleeved on the cylinder and is close to the bottom surface of the flange 11, the upper flange and the lower flange are connected through a bolt 3 and clamp and fix the flange; the flanges of the upper and lower string cylinder units are connected through a rigging or a suspender 4.

The utility model discloses during the implementation, the barrel can adopt 3 ~ 5 millimeters thick integrative preparation of flexible rubber to take shape.

The utility model discloses during the concrete implementation, the turn-ups width of barrel top mouth can set up to 5 ~ 8cm, is convenient for fixed with the flange.

The utility model discloses during the concrete implementation, the length of every barrel can set up to 1-2m, and the top mouth diameter of barrel is 25 ~ 35 cm.

The utility model discloses during the concrete implementation, go up flange and lower flange and all can adopt 3 ~ 5 millimeters thick steel sheet processing, its size is unanimous with the turn-ups size of barrel.

When the utility model is implemented, in order to facilitate the connection of the upper and lower cylinder stringing units, 6 suspender through holes 5 can be respectively arranged on the upper flange and the lower flange of each cylinder stringing unit and the flanging of the cylinder body in an annular and equidistant way; two adjacent string section of thick bamboo units from top to bottom are connected through 3 jibs 4 that the ring is to the equidistance and distributes, and the jib can adopt the finish rolling screw-thread steel, and 3 jibs upper and lower both ends pass 3 jib through-holes that the ring is to the equidistance and distributes on the upper and lower string section of thick bamboo unit respectively to at the upper flange top surface of upper and lower string section of thick bamboo unit and lower flange bottom surface spiro union nut 6 respectively, jib and nut play the connection effect of upper and lower flange concurrently, flange joint firmness about increasing. The suspender can keep the vertical posture and the stability of the string cylinder and ensure the smooth flowing and falling of the concrete.

During specific implementation, a bolt or deformed steel bar with a hook can also be arranged in the through hole of the suspender in a penetrating way, and the upper and lower string cylinder units are connected by a rigging through the hook.

The utility model is used for when concreting, according to the height of pouring the drop, with the cluster section of thick bamboo unit interconnect of appropriate quantity. A lifting rope can be wound at the bottom of the flange of the uppermost string of barrel units and connected with the concrete hopper. The pouring process comprises the following steps:

as shown in fig. 5 and 6, during initial pouring, after entering the cylinder 1 of the uppermost cylinder string unit, the concrete 7 is firstly accumulated on the circular part of the cylinder, and when reaching a certain amount, the concrete slides downwards under the action of gravity and gradually props up the flat mouth part of the cylinder to fall into the lower cylinder, and the flat mouth part can restrict and delay the falling speed of the concrete to prevent segregation;

after the concrete in the upper barrel enters the lower barrel 1, the concrete in the lower barrel falls in the same way as the upper barrel, and falls step by step in such a way, and finally reaches a pouring position.

As shown in fig. 7, after the concrete in the upper cylinder 1 completely flows out, the cylinder is restored by elasticity; when the subsequent concrete enters the cylinder body again, the falling process of the concrete is the same as that of the initial pouring.

As shown in fig. 8, when large amount of concrete is poured continuously, because the flat mouth part of each stage of the cylinder body has the functions of convergence and retardation on the concrete, the whole flowing process of the concrete flows in a restrained state, and the concrete does not have the states of divergence and free fall, thereby achieving the ideal anti-segregation effect.

Along with the rising of pouring surface, can lift off the lower string of a section of thick bamboo unit step by step to the pouring height of adaptation concrete.

Claims

1. The utility model provides a concrete placement prevents flexible cluster section of thick bamboo of educing, includes at least two string section of thick bamboo units of connecting from top to bottom, its characterized in that: each cylinder string unit comprises a cylinder body and a flange, the cylinder body is of a funnel-shaped structure which is made of flexible rubber materials and is round at the upper part and flat at the lower part, the cross section of the upper half part of the cylinder body is round, the lower half part of the cylinder body is a flat mouth, the inner walls of the two opposite sides are mutually attached, the top opening of the cylinder body is provided with an annular flange which is outwards turned over for a certain width, the flange comprises an upper flange and a lower flange, the upper flange is pressed on the top surface of the flange of the cylinder body, the lower flange is sleeved on the cylinder body and is close to the bottom surface of the flange, and the upper flange is connected with the lower flange through bolts and clamps and fixes the flange; the flanges of the upper and lower string cylinder units are connected through a rigging or a suspender.

2. The concrete pouring segregation-preventing flexible string of barrels of claim 1, wherein: the barrel is integrally formed by flexible rubber with the thickness of 3-5 mm.

3. The concrete pouring segregation-preventing flexible string of barrels of claim 1, wherein: the width of the flange of the cylinder is 5-8 cm.

4. The concrete pouring segregation-preventing flexible string of barrels of claim 1, wherein: the length of each cylinder is 1-2m, and the diameter of the top opening of each cylinder is 25-35 cm.

5. The concrete pouring segregation-preventing flexible string of barrels of claim 1, wherein: the upper flange and the lower flange are both processed by adopting steel plates with the thickness of 3-5 mm, and the size of the upper flange and the size of the lower flange are consistent with the size of a flange of the cylinder.

6. The concrete pouring segregation-preventing flexible string of barrels of claim 1, wherein: the upper flange and the lower flange of each string cylinder unit and the turned-over edge of the cylinder body are respectively provided with 6 suspender through holes circumferentially and equidistantly; two string section of thick bamboo units adjacent from top to bottom are connected through 3 jibs that the ring is to equidistance and distributes, and 3 jib through-holes that the ring is to the equidistance and distributes on upper and lower string section of thick bamboo unit are passed respectively to both ends about 3 jibs to upper flange top surface and lower flange bottom surface at upper and lower string section of thick bamboo unit are a spiro union nut respectively.