CN219319292U

CN219319292U - Pile foundation pore-forming straightness detection instrument that hangs down

Info

Publication number: CN219319292U
Application number: CN202223250169.1U
Authority: CN
Inventors: 张水红; 周叙伦; 徐超
Original assignee: MCC Tiangong Group Corp Ltd
Current assignee: MCC Tiangong Group Corp Ltd
Priority date: 2022-11-25
Filing date: 2022-11-25
Publication date: 2023-07-07
Anticipated expiration: 2032-11-25

Abstract

The utility model provides a pile foundation pore-forming verticality detection tool which comprises a support frame, a detection part and a measurement part, wherein the support frame is arranged at the upper part of a pile opening, the detection part and the pile foundation pore-forming are coaxially arranged and can move up and down in the pile foundation pore-forming along the axial direction of the pile foundation pore-forming, the detection part is connected with the support frame, and the measurement part is arranged on the support frame and is positioned on a pile core of the pile opening and used for measuring an included angle between the moving direction of the detection part and the vertical direction. The utility model has the advantages of improving the accuracy of pile foundation pore-forming verticality measurement, along with simple structure, convenient operation, improving the working efficiency and saving the measurement cost.

Description

Pile foundation pore-forming straightness detection instrument that hangs down

Technical Field

The utility model belongs to the technical field of building construction, and particularly relates to a pile foundation pore-forming verticality detection tool.

Background

The pile foundation is used as a structural form applied to a building foundation, and the perpendicularity of a pile body is one of important indexes for checking the construction quality of a bored pile. In the bored pile construction process, the drilling straightness that hangs down is too big will lead to steel reinforcement cage and pipe unable to be sunk, brings a great deal of trouble for the construction, simultaneously, and drilling skewness is too big still can weaken the effective bearing capacity of foundation pile, causes the pile foundation upper portion component to take place uneven subsidence.

In the prior art, according to the inspection and acceptance standards of construction quality of building foundation and the technical standards of building pile foundation, the verticality detection of the slurry wall-protecting cast-in-place pile adopts ultrasonic waves and a caliper to measure, and the allowable verticality deviation is less than or equal to 1%. At present, ultrasonic detection is mainly adopted for detecting the verticality of a hole formed in a bored pile.

The basic principle of ultrasonic detection is that the winch of the instrument is placed on the hole to make the ultrasonic transmitting and receiving probe aim at the center of the borehole, and in the process that the probe descends along the center line of the borehole, a series of electric pulses are sent by the pulse signal generator and applied to the piezoelectric body of the transmitting transducer, the piezoelectric body converts the signals into ultrasonic pulses and transmits the ultrasonic pulses, and the ultrasonic pulses pass through mud and the rear part of the side wall of the borehole and are reflected back to be received by the receiver and then converted into electric signals to be transmitted to the operation instrument. And according to the intensity of the reflected signal and the reflection time difference, the operator prints a hole wall curve on printing paper in real time. And intuitively judging the drilling quality according to the image.

In the method, the verticality detection result of the bored pile is often influenced due to the phenomena of diffusion, transmission, reflection and the like of ultrasonic waves in the detection process, so that the measurement result is inaccurate, meanwhile, the ultrasonic detection instrument is high in cost, the construction cost is greatly increased, and certain difficulty is brought to underwater operation, so that professional personnel are required to operate.

Disclosure of Invention

In order to solve the technical problems, the utility model provides the tool for detecting the verticality of the pile foundation hole, which effectively solves the problems of inaccurate pile foundation hole forming verticality measurement result, high operation difficulty and high cost, and overcomes the defects of the prior art.

The technical scheme adopted by the utility model is as follows: a pile foundation pore-forming straightness detection tool, comprising:

the support frame is arranged at the upper part of the pile opening;

the detection piece is coaxially arranged with the pile foundation pore-forming and can move up and down in the pile foundation pore-forming along the axial direction of the pile foundation pore-forming, and the detection piece is connected with the support frame;

and the measuring piece is arranged on the supporting frame, is positioned on the pile core of the pile opening and is used for measuring the included angle between the moving direction of the detecting piece and the vertical direction.

Further, the detection piece is cylindrical, and the diameter of the detection piece is the same as the diameter of the pile.

Further, the detecting member includes structural reinforcing bars, which are uniformly distributed along the circumferential direction of the detecting member.

Further, the detecting piece further comprises reinforcing ribs, and the reinforcing ribs are uniformly distributed along the axial direction of the detecting piece.

Further, the top centre of a circle of detecting element is equipped with the rope, rope one end with the top centre of a circle of detecting element is connected, and one end is equipped with elevating gear in addition, elevating gear sets up on the support frame, can drive the rope is followed the axial extension or the shortening of pile foundation pore-forming.

Further, a line drop is arranged on the supporting frame and is positioned on the pile core of the pile opening, and an included angle between the line drop and the rope is an included angle between the moving direction of the detecting piece and the vertical direction.

Further, the measuring device is an angle gauge, is rotationally connected with the supporting frame, and can measure an included angle between the line drop and the rope, and the included angle is an acute angle.

Further, a turntable is arranged on the protractor and is in rotary connection with the supporting frame.

Further, the top of support frame is equipped with the lifting hook.

The utility model has the advantages and positive effects that: due to the adoption of the technical scheme, the accuracy of pile foundation pore-forming verticality measurement is improved, the structure is simple, the operation is convenient, the working efficiency is improved, and the measurement cost is saved.

Drawings

Fig. 1 is a schematic diagram of the overall structure of a tool for detecting verticality of pile foundation holes according to an embodiment of the present utility model.

In the figure:

1. support frame 2, detecting piece 3 and protractor

4. Wire rope 5, lifting device 6 and guide shaft

7. Wire pendant 8, rotary disk 9 and lifting hook

10. Pile mouth 11, pile bottom 12 and pile foundation pore-forming

Detailed Description

The embodiment of the utility model provides a pile foundation pore-forming verticality detection tool, and the embodiment of the utility model is described below with reference to the accompanying drawings.

In the description of the embodiments of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "top", "bottom", etc. are based on the orientation or positional relationship shown in the drawings, are merely for convenience of description and to simplify the description, and are not indicative or implying that the apparatus or element in question must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present utility model. In the description of the present utility model, it should be noted that, unless explicitly stated and limited otherwise, the terms "disposed," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art in a specific case.

As shown in fig. 1, the tool for detecting verticality of pile foundation hole forming according to the embodiment of the utility model comprises a supporting frame 1, a detecting piece 2 and a measuring piece, wherein the supporting frame 1 is arranged at the upper part of a pile opening 10 and is used for installing the detecting piece 2 and the measuring piece. The specific form of the support member is not limited, and may be a tripod support or a square or rectangular frame structure. In this embodiment, the supporting frame 1 is a square frame structure, and is made of phi 14 i-steel, and stably supported on the upper portion of the pile opening 10, and the center of the supporting frame 1 is aligned with the pile core of the pile opening 10. The support frame 1 is connected with a detection piece 2, the detection piece 2 and the pile foundation pore-forming 12 are coaxially arranged, and the detection piece can move up and down in the pile foundation pore-forming 12 along the axis of the pile foundation pore-forming 12. The measuring piece is arranged on the support frame 1 and positioned at the pile core position of the pile opening 10 and is used for measuring the included angle theta between the moving direction of the detecting piece 2 and the vertical direction. The included angle θ is the included angle between the axis of the pile foundation hole 12 and the vertical direction. The tangent value of the included angle theta is the ratio of the deviation between the center point of the pile bottom 11 and the design point, namely the pile core of the pile mouth 10, to the designed pile length, namely the perpendicularity of the pile foundation pore-forming 12.

Specifically, the detecting member 2 is cylindrical, and the diameter of the detecting member 2 is the same as the pile diameter, so that the detecting member 2 and the pile foundation pore-forming 12 can be coaxially arranged, and the moving direction of the detecting member 2 is the axial direction of the pile foundation pore-forming 12. In this embodiment, the length of the detecting member 2 is 3 meters.

The detecting member 2 is in a cylindrical shape formed by pouring concrete, and the main body frame of the detecting member 2 is formed by uniformly distributing constructional steel bars (not shown in the figure) along the circumferential direction of the detecting member 2, wherein the constructional steel bars are parallel to the axial direction of the detecting member 2. In this embodiment, the main body frame of the detecting member 2 is composed of 8 reinforcing bars of phi 16 uniformly distributed along the circumferential direction of the detecting member 2.

In order to enhance the strength of the detecting member 2, reinforcing ribs (not shown) are uniformly distributed in the axial direction of the detecting member 2. In this embodiment, the reinforcing ribs are reinforcing ribs of phi 16, and are uniformly distributed at intervals of 1 m along the axial direction of the detecting member 2. The detecting element 2 needs to be able to sink in the mud under its own weight, down to the pile bottom 11, and thus needs to have sufficient weight, if necessary, to add a counterweight to the detecting element 2.

A steel wire rope 4 is fixed at the center of the top of the detecting piece 2, and one end of the steel wire rope 4 is fixed with the center of the top of the detecting piece 2. A guide shaft 6 is installed at the pile core position of the pile opening 10, and the guide shaft 6 is fixed on a support frame. The other end of the wire rope 4 bypasses the guide shaft 6 and is connected with a lifting device 5. The lifting device 5 is arranged on the upper part of the supporting frame 1, and the lifting device 5 and the guide shaft 6 are in the same vertical direction. The specific form of the lifting device 5 is not limited, and in this embodiment, the lifting device 5 is a hoist. The lifting device 5 drives one end of the steel wire rope 4 connected with the lifting device to vertically move upwards, and the detection piece 2 is driven to move upwards through the steel wire rope 4. When the detection piece 2 moves downwards along the axial direction of the pile foundation pore-forming 12 under the action of self gravity, the steel wire rope 4 is driven to deviate towards the moving direction of the detection piece 2 by taking the guide shaft 6 as the center, namely, deviate towards the axial direction of the pile foundation pore-forming 12. When the detecting piece 2 reaches the pile bottom 11, the deflection direction of the steel wire rope 4 is the moving direction of the detecting piece 2, namely the axial direction of the pile foundation pore-forming 12,

in order to facilitate the identification of the vertical direction, a wire weight 7 is mounted on the support frame 1, and the wire weight 7 is vertically mounted on the guide shaft 6, namely, on the pile core of the pile opening 10.

Specifically, the measuring device is a protractor 3, and is a high-precision protractor. The protractor 3 is arranged on the guide shaft 6, is rotationally connected with the guide shaft 6 and is used for measuring an included angle theta between the steel wire rope 4 and the wire pendant 7, and the included angle theta is an acute angle.

In order to facilitate the rotation of the protractor 3, a turntable 8 is sleeved on the guide shaft 6, and the turntable 8 is in rotary connection with the guide shaft 6. The protractor 3 is fixedly connected with the rotary table 8, and the rotary table 8 is rotated, so that the protractor 3 can be rotated along with the rotary table, and the measurement can be conveniently carried out.

In order to facilitate the movement of the whole device, hooks 9 are provided on the top of the support frame 1, and the specific form and number of the hooks 9 are not limited. In this embodiment, a hook 9 is mounted on top of the support 1 for movement of the whole device, made of phi 12 steel.

The using method comprises the following steps: the support frame 1 is placed on the upper part of the pile mouth 10, and the center of the support frame 1 is aligned with the pile core of the pile mouth 10. The detecting element 2 is placed in the pile foundation pore-forming 12, and the detecting element 2 moves downwards along the axis of the pile foundation pore-forming 12 under the action of gravity. The detecting piece 2 pulls the steel wire rope 4, and the steel wire rope 4 stretches along the axial direction of the pile foundation pore-forming 12 under the action of the guide shaft 6. When the detecting element 2 reaches the pile bottom 11, the wire rope 4 is in a tight state. At this time, an acute included angle is formed between the wire rope 4 and the wire pendant 7. The rotary table 8 is rotated to drive the protractor 3 to rotate, and the included angle theta between the steel wire rope 4 and the wire pendant 7 is measured. The tangent value of the included angle is the perpendicularity of the pile foundation hole 12, and the perpendicularity deviation is tan theta.

The utility model has the advantages and positive effects that:

due to the adoption of the technical scheme, the accuracy of pile foundation pore-forming verticality measurement is improved, the structure is simple, the operation is convenient, the working efficiency is improved, the manufacturing materials are field construction materials, and the measurement cost is saved.

The foregoing describes the embodiments of the present utility model in detail, but the description is only a preferred embodiment of the present utility model and should not be construed as limiting the scope of the utility model. All equivalent changes and modifications within the scope of the present utility model are intended to be covered by the present utility model.

Claims

1. Pile foundation pore-forming straightness detects instrument, a serial communication port, includes:

the support frame is arranged at the upper part of the pile opening;

2. The pile foundation pore-forming verticality detection tool of claim 1, wherein: the detection piece is cylindrical, and the diameter of the detection piece is the same as the diameter of the pile.

3. The pile foundation pore-forming verticality detection tool of claim 2, wherein: the detection piece comprises construction steel bars which are uniformly distributed along the circumference of the detection piece.

4. A pile foundation pore-forming verticality detection tool according to claim 3, wherein: the detection piece further comprises reinforcing ribs which are uniformly distributed along the axial direction of the detection piece.

5. The pile foundation pore-forming verticality detection tool of any of claims 2-4, wherein: the top centre of a circle of detecting element is equipped with the rope, rope one end with the top centre of a circle of detecting element is connected, and other one end is equipped with elevating gear, elevating gear sets up on the support frame, can drive the rope is followed the axial extension or the shortening of pile foundation pore-forming.

6. The pile foundation pore-forming verticality detection tool of claim 5, wherein: the support frame is provided with a line drop, the line drop is positioned on the pile core of the pile opening, and the included angle between the line drop and the rope is the included angle between the moving direction of the detection piece and the vertical direction.

7. The pile foundation pore-forming verticality detection tool of claim 6, wherein: the measuring piece is an angle gauge and is rotationally connected with the supporting frame, so that an included angle between the line drop and the rope can be measured, and the included angle is an acute angle.

8. The pile foundation pore-forming verticality detection tool of claim 7, wherein: the protractor is provided with a rotary table, and the rotary table is rotationally connected with the supporting frame.

9. The pile foundation pore-forming verticality detection tool according to any one of claims 1 to 4 and 6 to 8, wherein: the top of the supporting frame is provided with a lifting hook.