A processing device and method for floating reinforcement cage of concrete cast-in-place pile

Abstract

The present invention belongs to the field of civil construction technology, and in particular, relates to a processing device and method for floating of a reinforced cage of a concrete cast-in-place pile, wherein the processing device can be selectively installed on the top of a conduit, the conduit is used to transport concrete, the processing device comprises a sleeve and a sealing cover, the sleeve is detachably sleeved on the outer side of the circumference of the top of the conduit, the sealing cover is arranged on the top of the sleeve, and the sealing cover is arranged above the top of the conduit, and an openable blocking valve is arranged in the middle of the sealing cover. The present invention can solve the quality problem caused by the floating of the reinforced cage of the cast-in-place pile, and has good practical value.

Description

Technical Field

[0001] The invention belongs to the technical field of civil construction, and in particular relates to a processing device and a processing method for floating a reinforcement cage of a concrete cast-in-place pile. Background Art

[0002] Bored piles have been widely used in the foundation of highway, railway bridges and other structural engineering projects due to their mature construction technology, high bearing capacity and wide application range. Large, medium and small bridges and interchanges on high-grade highways basically use bored piles. However, since bored piles are a hidden project, practice shows that 5%-20% of bored piles still have quality problems to varying degrees, among which the incidents of abandoned piles due to floating of steel cages occur from time to time.

[0003] During the construction of bored pile foundation, if the concrete has poor workability and the construction process is not strictly controlled during pouring, it is easy for the steel cage to float up, which may be as little as a dozen centimeters, or as much as dozens of centimeters or even several meters. Slight floating generally does not affect the use value of the pile, but excessive floating of the steel cage will affect the use value of the pile. The floating of the steel cage affects the overall bearing capacity of the pile hole, and it cannot safely bear the design load, which will inevitably cause rework. If the construction is carried out at the original pile position, impact drilling must be used because the steel cage is left in the hole, and the difficulty of drilling is increased, and the cost is more than doubled. If the original pile position cannot be drilled, the design needs to be changed, and piles are added on both sides or all four sides of the original pile position, which increases the cost by 2 to 4 times.

[0004] Therefore, the existing technology needs to be improved. Summary of the invention

[0005] In view of the problems existing in the above-mentioned prior art, the present invention provides a device and method for treating the floating of a reinforcement cage of a concrete bored pile, so as to solve or partially solve the construction problems caused by the floating of the reinforcement cage in the prior art.

[0006] The present invention achieves the above-mentioned purpose through the following technical solutions:

[0007] On the one hand, the present invention provides a processing device for the floating of a concrete bored pile reinforcement cage, the processing device is used for the processing work of the floating of a concrete bored pile reinforcement cage, the processing device can be selectively installed on the top of a conduit, the conduit is used to transport concrete, the processing device includes a sleeve and a sealing cover, the sleeve is detachably mounted on the outer side of the circumference of the top of the conduit, the sealing cover is arranged on the top of the sleeve, and the sealing cover is arranged above the top of the conduit, and an openable sealing valve is arranged in the middle of the sealing cover.

[0008] Furthermore, the sleeve is threadedly sleeved on the outer circumference of the top of the conduit.

[0009] Furthermore, a gasket is provided at the bottom of the sealing cover, and the gasket is provided on the inner side of the top of the sleeve and located at the top of the conduit, and the gasket is provided with a communicating hole.

[0010] Furthermore, a through hole is provided in the middle of the sealing cover, and the edge of the through hole of the sealing cover extends upward to form a connecting sleeve, and the blocking valve is openably provided on the top of the connecting sleeve.

[0011] Furthermore, the blocking valve comprises a valve body, one end of which is rotatably connected to one side of the top of the connecting sleeve, and the other end of the valve body can be covered on the other side of the top of the connecting sleeve.

[0012] On the other hand, the present invention also provides a method for treating the floating of a reinforced cage of a concrete cast-in-place pile, the method comprising:

[0013] S1: Confirm that the steel cage around the concrete pile under construction is floating;

[0014] S2: Stop pouring concrete into the conduit, remove the hopper at the top of the conduit, and install the above-mentioned processing device at the top of the conduit;

[0015] S3: closing the blocking valve of the processing device;

[0016] S4: After lifting the conduit to the set height, the conduit is slowly lowered. During the process of lifting the conduit, the blocking valve is closed, and during the process of lowering the conduit, the blocking valve is opened;

[0017] S5: Observe whether the steel cage is reset. If the steel cage is reset, remove the processing device, install a hopper on the top of the conduit, and continue the construction of the concrete pile. If the steel cage is not reset, repeat S3 until the steel cage is reset.

[0018] Furthermore, the S1 specifically includes:

[0019] By observing the status of the steel cage suspension bars, if the suspension bars are loose or stick out of the holes, it can be confirmed that the steel cage is floating.

[0020] Furthermore, in S4, the conduit is lifted or lowered by a crane or a drilling rig.

[0021] Furthermore, in S4, the standard of the lifting height of the conduit is that the conduit does not protrude from the concrete surface after lifting.

[0022] The beneficial effects of the present invention include at least:

[0023] The present invention provides a method for processing the floating of a steel cage of a concrete bored pile. When the steel cage of the concrete bored pile floats, the hopper at the top of a conduit is removed, and a processing device is installed on the top of the conduit. After the blocking valve of the processing device is closed, the conduit is sealed, and then the conduit is lifted and lowered. During the lifting and lowering process of the conduit, a pressure difference is generated inside and outside the conduit, so that the flood concrete below the conduit is sucked into the conduit and moves in the conduit, and the concrete (dry, hard, segregated, and poorly workable concrete) causing the floating of the steel cage can be disturbed and mixed to improve the workability of the concrete in this part. Finally, the sinking and resetting of the steel cage is achieved by relying on the self-gravity of the steel cage.

[0024] The present invention is a treatment plan for the floating of the steel cage found during the construction of concrete bored piles. The problem can be discovered early and treated in time, and the operation steps are few, simple and convenient, the treatment speed is fast, the effect is obvious, the construction period is saved, the cost is saved, and the quality problem caused by the floating of the steel cage of the bored piles is solved with extremely low investment, and the problem has good practical value. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0026] Figure 1 A schematic diagram of the structure of the concrete cast-in-place pile construction environment of this embodiment;

[0027] Figure 2 This is a structural schematic diagram of a processing device for floating a reinforced cage of a concrete cast-in-place pile according to this embodiment;

[0028] Figure 3 for Figure 2 Schematic cross-sectional view of ;

[0029] Figure 4 for Figure 2 A schematic diagram of the installation state of the processing device shown;

[0030] Figure 5 It is a schematic flow chart of a method for floating a reinforced cage of a concrete bored pile according to the present embodiment. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0032] During the construction of bored concrete piles, the applicant discovered that the reason for the floating of the reinforcement cage was due to the quality problems of the poured concrete during the concrete pouring process. The concrete quality problems included hard and dry concrete, segregation and poor workability. If the poured concrete could be re-mixed, the floating of the reinforcement cage could be solved. However, the poured concrete was already underwater, making construction inconvenient. Therefore, the applicant designed a method using the siphon principle to solve the floating of the reinforcement cage of bored concrete piles.

[0033] First, this embodiment briefly introduces the construction environment of cast-in-place concrete piles.

[0034] Figure 1 The structural diagram of the concrete cast-in-place pile construction environment of this embodiment is shown in FIG. Figure 1 During the construction of concrete cast-in-place piles, the conduit 1 is used to transport concrete. A hopper 2 is provided at the top of the conduit 1. A chuck 3 is fixedly provided at the top of the conduit 1. The upper end of the steel cage 4 is suspended on the chuck 3 through a plurality of hanging rods 5. The lower end of the steel cage 4 is buried in the concrete poured at the bottom of the conduit 1.

[0035] Again, this embodiment discloses a device for processing the floating of a reinforced cage of a cast-in-place concrete pile, which is used for processing the floating of a reinforced cage of a cast-in-place concrete pile.

[0036] Figure 2 Schematic diagram of the structure of a device for processing floating reinforcement cage of a concrete cast-in-place pile according to the present embodiment. Figure 3 for Figure 2 A cross-sectional diagram of Figure 4 for Figure 2 The schematic diagram of the installation state of the processing device shown in FIG. Figure 2-Figure 4 The processing device in this embodiment can be selectively installed on the top of the catheter 1. The processing device includes a sleeve 6 and a sealing cover 7. The sleeve 6 is detachably mounted on the outer side of the circumference of the top of the catheter 1. The sealing cover 7 is arranged on the top of the sleeve 6, and the sealing cover 7 is arranged above the top of the catheter 1. An openable blocking valve 8 is arranged in the middle of the sealing cover 7.

[0037] Combination Figure 3In this embodiment, the sleeve 6 can be threadedly mounted on the outer side of the top circumference of the catheter 1 to achieve a detachable arrangement of the sleeve 6 on the outer side of the top circumference of the catheter 1, and also has a self-locking function to ensure sealing.

[0038] Combination Figure 3 In this embodiment, a gasket 9 is provided at the bottom of the sealing cover 7, and the gasket 9 is provided inside the top of the sleeve 6 and located at the top of the conduit 1, and the gasket 9 is provided with a connecting hole. The gasket of this embodiment can improve the sealing between the sleeve 6 and the conduit 1.

[0039] Furthermore, combined with Figure 3 In this embodiment, a through hole 10 is provided in the middle of the sealing cover 7, and the edge of the through hole 10 of the sealing cover 7 extends upward to form a connecting sleeve 11, and the blocking valve 8 is openably provided at the top of the connecting sleeve 11.

[0040] Combination Figure 3 In this embodiment, the blocking valve 8 includes a valve body, one end of which is rotatably connected to one side of the top of the connecting sleeve 11, and the other end of the valve body can be covered on the other side of the top of the connecting sleeve 11, that is, the blocking valve 8 of this embodiment can be operated to be opened.

[0041] In this embodiment, the blocking valve 8 may also include two opposing valve bodies, and the two valve bodies form a split structure, which is not limited in this embodiment.

[0042] Finally, this embodiment also provides a method for processing the floating of a reinforced cage of a concrete cast-in-place pile. Figure 5 This is a flow chart of a method for treating the floating of a reinforced cage of a concrete cast-in-place pile according to this embodiment, combined with Figure 5 , the processing method includes:

[0043] S1: Confirm that the steel cage around the concrete pile under construction is floating, specifically:

[0044] By observing the state of the hanging bars 5 of the steel cage 4, if the hanging bars 5 are loose, or the hanging bars 5 come out of the hole, it is confirmed that the steel cage 4 floats up.

[0045] For cast-in-place piles designed with full-length steel cages, the steel cage is most likely to float when the first batch of concrete is poured, and this requires intensive monitoring; for cast-in-place piles designed with non-full-length steel cages, the steel cage is most likely to float when the poured concrete surface contacts the bottom of the steel cage. The construction worker measures the concrete elevation in the hole, and when approaching the bottom of the steel cage, he pours concrete while observing the state of the steel cage suspension bars.

[0046] S2: Stop pouring concrete into the conduit 1, remove the hopper 2 located at the top of the conduit 1, and install the above-mentioned processing device at the top of the conduit 1;

[0047] S3: After lifting the conduit 1 to the set height, the conduit 1 is slowly lowered. During the lifting of the conduit 1, the lifting speed of the conduit 1 can be slightly faster, and the blocking valve 8 is closed. During the lowering of the conduit, the blocking valve 8 is opened.

[0048] In S3 of this embodiment, the conduit 1 can be lifted or lowered by a crane or a drilling rig, and the standard of the lifting height of the conduit 1 is that the conduit 1 after lifting does not protrude from the concrete surface to avoid pile breakage.

[0049] S4: Observe whether the steel cage 4 is reset. If the steel cage 4 is reset, remove the processing device, install the hopper 2 on the top of the guide tube 1, and continue the construction of the concrete pile. If the steel cage 4 is not reset, repeat S3 until the steel cage 4 is reset.

[0050] The present embodiment provides a method for processing the floating of a concrete bored pile reinforcement cage. When the concrete bored pile reinforcement cage floats, the hopper at the top of the conduit is removed, and a processing device is installed on the top of the conduit. After closing the sealing valve of the processing device, the conduit is sealed, and then the conduit is lifted and lowered. During the process of lifting and lowering the conduit, a pressure difference is generated inside and outside the conduit. The sealing valve of the processing device can be automatically closed when the conduit is lifted. When the conduit is lowered, the air in the conduit can automatically push open the sealing valve, and the flood concrete under the conduit can be sucked back into the conduit and move in the conduit. The concrete (dry, hard, segregated, and poorly workable concrete) that causes the reinforcement cage to float can be disturbed and mixed to improve the workability of the concrete in this area. Finally, the reinforcement cage is sunk and reset by its own gravity.

[0051] The present invention is described below by means of two specific examples.

[0052] Embodiment 1:

[0053] The bored piles of a bridge were designed to be 40 meters long, with a steel cage length of 39.95 meters and a pile diameter of 1.2 meters. The holes were drilled using the impact method and the piles were formed by pouring underwater concrete using the catheter method.

[0054] After the 5-5# bored pile hole inspection was passed, the guide tube, chuck and hopper were installed. After the preparatory engineering inspection was passed, the first batch of concrete was poured. The construction worker observed that the steel cage hanging rod was shaking and then rushed out of the hole. The construction worker immediately notified the concrete tank truck to stop discharging the material and used the crane to lift the guide tube about 30 centimeters. After the concrete in the hopper was discharged, there was no sign of the steel cage hanging rod rising. The guide tube was lowered to its original position, the hopper was removed, the processing device was installed, and the guide tube was lowered about 20 centimeters by crane, and then lifted about 50 centimeters. At this time, the steel cage hanging rod had begun to slowly descend. After the crane repeated the above actions twice, the steel cage was reset, and then replaced with qualified underwater concrete and continued pouring. There was no floating cage phenomenon and the pile foundation inspection was qualified.

[0055] Embodiment 2:

[0056] The bored piles of a bridge are designed to be 40 meters long, with a steel cage length of 24.95 meters and a pile diameter of 1.5 meters. The holes are made by the impact method and the piles are made by pouring underwater concrete using the catheter method.

[0057] After the inspection of the 2-5# bored pile was passed, the guide tube, chuck and hopper were installed. After the preparatory engineering inspection was passed, concrete pouring was carried out. When pouring the third truck of concrete, the construction worker observed that the steel cage hanging rod was shaking and then rushed out of the hole. The construction worker immediately notified the concrete tank truck to stop discharging. The concrete elevation in the hole was measured, which was about 1 meter above the bottom of the steel cage, and the guide tube was buried 2 meters deep. The construction worker directed the unloading of the hopper, installed the sealing device, and used the crane to lower the guide tube about 1 meter, and then lifted it up about 2~2.5 meters. At this time, the steel cage hanging rod had begun to slowly descend. After the crane repeated the above action twice, the steel cage was reset. After that, the qualified underwater concrete was replaced and the pouring continued. No floating cage phenomenon occurred, and the pile foundation inspection passed.

[0058] To sum up, this embodiment is a treatment plan for the floating of the steel cage found during the construction of concrete bored piles. It can be discovered early and handled in time, with fewer operating steps, simple and convenient, fast processing speed, obvious effect, saving construction time and cost. It solves the quality problems caused by the floating of the steel cage of the bored pile with extremely low investment, and has good practical value.

[0059] The above embodiments are preferred implementation modes of the present invention and are only used to facilitate the description of the present invention. They are not intended to limit the present invention in any form. Any person with ordinary knowledge in the technical field may, without departing from the scope of the technical features of the present invention, make partial changes or modifications to the technical contents disclosed in the present invention, and the equivalent embodiments without departing from the technical features of the present invention are still within the scope of the technical features of the present invention.

Claims

1. A device for processing the floating of a reinforced cage of a concrete pile, characterized in that: The processing device is used for the floating processing of the reinforced cage of the concrete cast-in-place pile. The processing device is selectively installed on the top of the conduit. The conduit is used to transport concrete. The processing device includes a sleeve and a sealing cover. The sleeve is detachably sleeved on the outer side of the circumference of the top of the conduit. The sealing cover is arranged on the top of the sleeve and above the top of the conduit. An open blocking valve is arranged in the middle of the sealing cover. The sleeve is threadedly sleeved on the outer side of the circumference of the top of the conduit; A gasket is provided at the bottom of the sealing cover, and the gasket is arranged on the inner side of the top of the sleeve and located at the top of the conduit, and the gasket is provided with a communicating hole; A through hole is arranged in the middle of the sealing cover, and the edge of the through hole of the sealing cover extends upward to form a connecting sleeve, and the blocking valve is opened and arranged on the top of the connecting sleeve.

2. A processing device for floating a concrete cast-in-place pile reinforcement cage according to claim 1, characterized in that: The blocking valve comprises a valve body, one end of which is rotatably connected to one side of the top of the connecting sleeve, and the other end cover of the valve body is arranged on the other side of the top of the connecting sleeve.

3. A method for treating the floating of a reinforced cage of a cast-in-place concrete pile according to any one of claims 1 to 2, characterized in that: The processing method comprises: S1: Confirm that the steel cage around the concrete pile under construction is floating; S2: Stop pouring concrete into the conduit, remove the hopper at the top of the conduit, and install the processing device according to any one of claims 1 to 2 at the top of the conduit; S3: closing the blocking valve of the processing device; S4: After lifting the conduit to the set height, the conduit is slowly lowered. During the process of lifting the conduit, the blocking valve is closed, and during the process of lowering the conduit, the blocking valve is opened; S5: Observe whether the steel cage is reset. If the steel cage is reset, remove the processing device, install a hopper on the top of the conduit, and continue the construction of the concrete pile. If the steel cage is not reset, repeat S3 until the steel cage is reset.

4. A method for treating the floating of a reinforced cage of a concrete bored pile according to claim 3, characterized in that: The S1 specifically includes: By observing the status of the steel cage suspension bars, if the suspension bars are loose or stick out of the holes, it can be confirmed that the steel cage is floating.

5. A method for treating the floating of a reinforced cage of a concrete bored pile according to claim 3, characterized in that: In S3, the conduit is lifted or lowered by a crane or a drilling rig.

6. A method for treating the floating of a reinforced cage of a concrete bored pile according to claim 3, characterized in that: In S3, the standard of the lifting height of the conduit is that the conduit does not protrude from the concrete surface after lifting.

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