CN218861534U - Reinforcing cage transfer centering device for construction of ultra-long cast-in-situ bored pile - Google Patents

Abstract

The utility model provides a centering device is transferred to reinforcing cage for construction of overlength bored concrete pile, is including being annular holding ring (1), and the upper portion array welding of holding ring (1) has four positioning cylinder (2), and the anterior articulated reinforcing cage centering ring (3) that are the arc ring shape of installing of every positioning cylinder (2). The utility model discloses a four positioning cylinder (2) can be adjusted alone respectively, guarantee the central line of steel reinforcement cage (6) and the central line coincidence of a section of thick bamboo (5), can also avoid the steel reinforcement cage to sink the in-process and collide with and protect a section of thick bamboo inner wall, simultaneously the utility model discloses the steel reinforcement cage (6) of adaptable different dimensions transfer the use.

Description

Reinforcing cage transfer centering device for construction of ultra-long cast-in-situ bored pile

Technical Field

The utility model belongs to the technical field of construction or bridge construction technique and specifically relates to a centering device is transferred to reinforcing bar cage for construction of overlength bored concrete pile.

Background

The cast-in-situ bored pile is a pile formed by forming a pile hole in foundation soil through means such as mechanical drilling, steel pipe soil extrusion or manual excavation on an engineering site and placing a reinforcement cage and cast-in-place concrete in the pile hole, wherein the pile hole with the depth of more than 70m is called as an ultra-long cast-in-situ bored pile, the reinforcement cage needs to be vertically placed in a pile hole casing during construction, the inner wall of the casing needs to be prevented from being knocked during the sinking process of the reinforcement cage, and meanwhile, the center line of the reinforcement cage and the center line of the casing need to be ensured to coincide.

In traditional overlength bored concrete pile construction, generally adopt the loop wheel machine to hoist the steel reinforcement cage, with the vertical steel reinforcement cage of placing in a stake hole pile casing, only rely on constructor's vision to judge whether the central line of steel reinforcement cage and the central line of pile casing coincide, simultaneously under the strong wind condition, can blow the steel reinforcement cage and rock, extremely bump against a pile casing inner wall. Mode is transferred to traditional steel reinforcement cage like this, can lead to the steel reinforcement cage off normal serious after a lot of bored concrete pile construction are accomplished, and the foundation quality of bored concrete pile is poor threatens engineering safety even.

SUMMERY OF THE UTILITY MODEL

In order to solve the problem that exists among the above-mentioned prior art, the utility model provides a centering device is transferred to reinforcement cage for construction of overlength bored concrete pile.

The utility model provides a technical scheme that its technical problem adopted is:

the utility model provides a centering device is transferred to reinforcing bar cage for construction of overlength bored concrete pile, has four positioning cylinder 2 including being the annular holding ring 1 of circle, the upper portion array welding of holding ring 1, and the articulated reinforcing bar cage centering ring 3 that is the arc annular of installing in the front portion of every positioning cylinder 2.

The utility model discloses still have following additional technical characterstic:

as the utility model discloses technical scheme further specifically optimizes: the inner diameter of the positioning ring 1 is larger than the outer diameter of the protecting cylinder 5, and the positioning ring 1 is sleeved outside the protecting cylinder 5.

As the utility model discloses technical scheme further specifically optimizes: the equipartition has the fixed orifices 101 that a plurality of runs through on the ring body of holding ring 1, and fixed orifices 101 cooperate and are provided with long steel nail 4, and long steel nail 4 smashes into ground after inserting in fixed orifices 101, through a plurality of long steel nail 4, with the firm fixing of holding ring 1 subaerial prevent to take place to remove.

As the utility model discloses technical scheme further specifically optimizes: a plurality of fixing blocks 102 are uniformly distributed on the ring body of the positioning ring 1, a positioning oil cylinder 2 is placed inside the fixing blocks 102, and the positioning oil cylinder 2 is fixed on the fixing blocks 102 in a welding mode.

As the utility model discloses technical scheme is further specifically optimized: the front end of the telescopic shaft of the positioning oil cylinder 2 is provided with a Y-shaped hinge groove 201, and a steel reinforcement cage centering ring 3 is installed in the hinge groove 201 in a hinge mode.

As the utility model discloses technical scheme further specifically optimizes: the whole body of the steel reinforcement cage centering ring 3 is in an arc ring shape, a bent rotating shaft 301 is welded at the rear part of the steel reinforcement cage centering ring 3, and the rotating shaft 301 is inserted into the hinge groove 201 to install the steel reinforcement cage centering ring 3 at the front end of the telescopic shaft of the positioning oil cylinder 2 in a hinged mode.

As the utility model discloses technical scheme further specifically optimizes: the reinforcement cage centering ring 3 in the shape of an arc ring is provided with different sizes so as to adapt to reinforcement cages 6 in different sizes.

Compared with the prior art, the utility model, its advantage lies in:

the utility model discloses a four positioning cylinder 2 can adjust alone respectively, guarantee the central line of steel reinforcement cage 6 and the central line coincidence of a section of thick bamboo 5, can also avoid the steel reinforcement cage to sink the in-process and collide with and protect a section of thick bamboo inner wall, simultaneously the utility model discloses the steel reinforcement cage 6 of adaptable different dimensions transfers the use.

Drawings

Fig. 1 is a schematic overall top view structure of the present invention;

FIG. 2 is a schematic view of a partial three-dimensional structure of the present invention;

fig. 3 is a schematic view of the installation structure of the present invention;

FIG. 4 is a schematic view of the structure of the present invention;

fig. 5 is a schematic view of the structure of the present invention.

Description of reference numerals: the steel reinforcement cage centering device comprises a positioning ring 1, a positioning oil cylinder 2, a steel reinforcement cage centering ring 3, a long steel nail 4, a protective cylinder 5 and a steel reinforcement cage 6.

Detailed Description

Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings.

Example 1

The utility model provides a centering device is transferred to overlength drilling bored concrete pile for steel reinforcement cage for construction, is including being the annular holding ring 1 of circle, and the upper portion array of holding ring 1 has four positioning cylinder 2, and the forward-mounted of every positioning cylinder 2 has steel reinforcement cage centering ring 3.

The internal diameter of holding ring 1 will be greater than the external diameter of protecting a section of thick bamboo 5, and it also needs be greater than the external diameter of protecting a section of thick bamboo 5 to constitute circular internal diameter when four positioning cylinder 2 are the shortest state, reserves the flexible working space of positioning cylinder 2, cup joints the outside of protecting a section of thick bamboo 5 with holding ring 1.

The equipartition has the fixed orifices 101 that a plurality of runs through on the ring body of holding ring 1, and fixed orifices 101 cooperate and are provided with long steel nail 4, and long steel nail 4 smashes into ground after inserting in fixed orifices 101, through a plurality of long steel nail 4, with the firm fixing of holding ring 1 subaerial prevent to take place to remove. Meanwhile, the top of the long steel nail 4 is provided with a lifting lug, after the steel reinforcement cage 6 is placed downwards, the lifting lug of the long steel nail 4 is hooked by the aid of a hanging hook of a crane, and the long steel nail 4 can be pulled out of the ground.

A plurality of fixing blocks 102 are uniformly distributed on the ring body of the positioning ring 1, a positioning oil cylinder 2 is placed inside the fixing blocks 102, and the positioning oil cylinder 2 is fixed on the fixing blocks 102 in a welding mode. Four positioning oil cylinders 2 are generally arranged, and the reinforcement cage 6 can be centered from four directions, namely front, back, left and right.

The front end of the telescopic shaft of the positioning oil cylinder 2 is provided with a Y-shaped hinge groove 201, the rear part of the steel reinforcement cage centering ring 3 is welded with a bent rotating shaft 301, and the rotating shaft 301 is inserted into the hinge groove 201 to install the steel reinforcement cage centering ring 3 at the front end of the telescopic shaft of the positioning oil cylinder 2 in a hinge mode. The positioning oil cylinders 2 push the steel reinforcement cage centering ring 3 to move forwards, so that the steel reinforcement cage centering ring 3 is completely attached to the outer wall of the steel reinforcement cage 6, the four positioning oil cylinders 2 are adjusted respectively, and the central line of the steel reinforcement cage 6 and the central line of the pile casing 5 are ensured to coincide. Meanwhile, the outer diameter of the steel reinforcement cage 6 is generally smaller than the inner diameter 100mm of the protective cylinder 5, after the steel reinforcement cage 6 is centered, the distance between the outer wall of the steel reinforcement cage 6 and the inner wall of the protective cylinder 5 is 50mm, and the steel reinforcement cage can be prevented from colliding with the inner wall of the protective cylinder in the sinking process.

The whole of the steel reinforcement cage centering ring 3 is arc-shaped, and the steel reinforcement cage centering ring 3 is provided with different size specifications to adapt to the steel reinforcement cages 6 with different size specifications.

Example 2

The use method of the steel reinforcement cage lowering and centering device in the construction of the ultra-long cast-in-situ bored pile comprises the following steps:

(1) Preparation for construction

And arranging a construction site, and selecting a drilling machine and a drilling tool according to geological conditions and application conditions of various drilling machines.

(2) Mounting and positioning of drilling machines

For the foundation with soft stratum and slope, a bulldozer can be used for leveling the foundation, and then a steel plate or a sleeper is laid for reinforcement, so that the stability of the foundation installed by the drilling machine is ensured.

(3) Embedded protection cylinder

When the drill hole is deep, the hole wall soil below the underground water level collapses into the hole under the hydrostatic pressure, and even the sand flowing phenomenon occurs. The embedded pile casing can prevent the collapse of the drilled hole, isolate surface water, protect the ground of the hole opening, position of the fixed pile hole and guide effect of the drill bit. The length of each section of the steel casing is about 2 to 6m.

(4) Slurry preparation

The drilling mud consists of water, clay (bentonite) and additive, and has the functions of suspending drilling slag, cooling the drill bit, lubricating the drilling tool, increasing hydrostatic pressure, forming mud skin on the hole wall, isolating seepage inside and outside the hole and preventing hole collapse.

(5) Drilling holes

Before drilling, the central line and the verticality must be aligned, and the casing must be pressed. During construction, the continuous addition of slurry and slag extraction (for impact) are required, and whether the hole is inclined or not is also required to be checked at any time.

(6) Cleaning hole

When the final hole inspection completely meets the design requirements, the hole bottom is immediately cleaned, and the problem that the drilling collapses due to mud sedimentation caused by too long time interval is avoided. The principle of cleaning holes can be that high-pressure air generated by a compressor is blown into a pipeline of the mud suction machine to blow mud out.

(7) Down-placing reinforcement cage

After the hole is cleared, the steel reinforcement cage is used for lowering the centering device to be matched with a crane to vertically lower the prefabricated steel reinforcement cage into the hole.

Firstly, the central line position of the protective cylinder 5 is measured in advance, the positioning ring 1 is sleeved outside the protective cylinder 5, the central line position of the positioning ring 1 and the central line position of the protective cylinder 5 are overlapped as much as possible, the long steel nail 4 is inserted into the fixing hole 101 and then is hammered into the ground, and the positioning ring 1 is firmly fixed on the ground to prevent movement. The four positioning oil cylinders 2 are kept in a retraction state, and a space for lowering the reinforcement cage 6 is reserved, as shown in fig. 3.

Secondly, the loop wheel machine hangs prefabricated steel reinforcement cage 6, shifts to protecting directly over a section of thick bamboo 5, transfers one section steel reinforcement cage 6, is that the bottom of steel reinforcement cage 6 is arranged in the steel reinforcement cage and transfers centering device. The stretching amounts of the four positioning oil cylinders 2 are respectively and independently adjusted, the center line of the reinforcement cage 6 is ensured to be superposed with the center line of the protective cylinder 5, and the centering step of the reinforcement cage 6 is completed, as shown in fig. 4.

Finally, the reinforcement cage 6 is continuously lowered until the lowering of the reinforcement cage 6 is completed, as shown in fig. 5.

(8) Pouring underwater concrete

After the steel reinforcement cage 6 is placed, the concrete is poured by the guide pipe, and the concrete is not interrupted during pouring, otherwise, the pile breaking phenomenon is easy to occur.

The above detailed description of embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the invention as claimed, but is merely representative of selected embodiments of the invention.

Claims (3)

1. The utility model provides a centering device is transferred to super long drilling bored concrete pile construction with steel reinforcement cage, its characterized in that: the steel reinforcement cage centering device comprises a circular positioning ring (1), wherein four positioning oil cylinders (2) are welded on the upper part of the positioning ring (1) in an array mode, and an arc-shaped steel reinforcement cage centering ring (3) is hinged to the front part of each positioning oil cylinder (2);

a plurality of fixing holes (101) which penetrate through the positioning ring (1) are uniformly distributed in the ring body of the positioning ring, long steel nails (4) are arranged in the fixing holes (101) in a matching mode, the long steel nails (4) are inserted into the fixing holes (101) and then hammered into the ground, and the positioning ring (1) is firmly fixed on the ground through the plurality of long steel nails (4) to prevent movement;

a plurality of fixing blocks (102) are uniformly distributed on a ring body of the positioning ring (1), a positioning oil cylinder (2) is placed inside each fixing block (102), and the positioning oil cylinder (2) is fixed on the fixing blocks (102) in a welding mode;

a Y-shaped hinge groove (201) is formed in the front end of a telescopic shaft of the positioning oil cylinder (2), and a steel reinforcement cage centering ring (3) is installed in the hinge groove (201) in a hinge mode;

the whole of the steel reinforcement cage centering ring (3) is in an arc ring shape, a rotating shaft (301) in a bent shape is welded at the rear part of the steel reinforcement cage centering ring, and the rotating shaft (301) is inserted into the hinge groove (201) to install the steel reinforcement cage centering ring (3) at the front end of a telescopic shaft of the positioning oil cylinder (2) in a hinged mode.

2. The reinforcing cage lowering and centering device for the construction of the overlong cast-in-situ bored pile according to claim 1, wherein: the inner diameter of the positioning ring (1) is larger than the outer diameter of the protecting cylinder (5), and the positioning ring (1) is sleeved with the outer part of the protecting cylinder (5).

3. The reinforcing cage lowering and centering device for the construction of the overlong cast-in-situ bored pile according to claim 1, wherein the centering device comprises: the reinforcement cage centering ring (3) in an arc ring shape is provided with different sizes to adapt to reinforcement cages (6) in different sizes.

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