Ultrasonic depth detection device for pile foundation reinforcement cage

Abstract

The utility model provides an ultrasonic depth detection device for a pile foundation reinforcement cage, which belongs to the technical field of foundation detection and comprises a reinforcement cage and an ultrasonic detector provided with a self-transmitting and self-receiving ultrasonic probe capable of transmitting and receiving ultrasonic waves. The self-transmitting and self-receiving type ultrasonic probe can be located above one reinforcing steel bar in the reinforcing steel bar cage. When the embedding depth of the reinforcement cage needs to be detected, the reinforcement cage can be subjected to nondestructive measurement by utilizing the propagation characteristics of ultrasonic waves, and the whole measurement process has the advantages of being recyclable, low in use cost, high in efficiency, simple to use, free of nondestructive operation, low in construction environment requirement, free of additional cost for detecting drill holes and the like, and the like.

Description

Technical Field

[0001] The utility model belongs to the technical field of foundation detection, and in particular relates to an ultrasonic depth detection device for a pile foundation reinforcement cage. Background Art

[0002] At present, the following problems often occur during pile foundation construction: 1. The steel cage cannot be lowered to the specified depth due to problems such as incorrect placement or skewness of the steel cage; 2. In rock-embedded pile areas with complex geotechnical conditions, the depth of the pile wells at each location is different, and the corresponding pile lengths are different, so the steel cage is easily placed incorrectly during construction; 3. Since the length of some steel cages does not meet the design requirements during the production process, it is easy to cause the pile depth to fail to meet the requirements, which seriously affects the quality of the pile foundation. Therefore, during the pile foundation construction process, it is necessary to test the depth of the steel cage to ensure the quality of the entire pile foundation.

[0003] At present, the commonly used method for determining the buried depth of the steel cage is the magnetic logging method, that is, first drill a detection hole with the same depth as the pile foundation hole next to the pile foundation hole, then place a transmitting coil at the upper end of the steel cage, and lower the receiving coil in the detection hole, and use the principle of electromagnetic induction to detect whether the lowering depth of the steel cage reaches the specified depth.

[0004] However, since the environment around pile foundations is generally complex, it is not only easily restricted by site conditions, resulting in the distance between the detection hole and the pile foundation hole exceeding the prescribed distance, but also has the problems of slow work efficiency, high cost, and inability to apply large-area measurements. Utility Model Content

[0005] The technical problem solved by the utility model is to provide an ultrasonic depth detection device for pile foundation steel cage, and make it have the characteristics of high working efficiency, simple operation, stable detection, low cost, etc., so as to facilitate construction personnel to detect the buried depth of the steel cage.

[0006] In order to solve the above technical problems, the technical solution provided by the utility model is: an ultrasonic detection depth device for pile foundation steel cage, which includes a steel cage, and also includes an ultrasonic detector, the ultrasonic detector is provided with a self-emitting and self-receiving ultrasonic probe capable of emitting and receiving ultrasonic waves, and the self-emitting and self-receiving ultrasonic probe can be located above one of the steel bars in the steel cage. At this time, when it is necessary to detect the buried depth of the steel cage, the utility model can first place the ultrasonic detector above one of the steel bars in the steel cage, and then control the ultrasonic detector to emit ultrasonic waves downward, and control the self-emitting and self-receiving ultrasonic probe to receive the echo reflected from the pile base surface after penetrating the steel bars and connectors in the steel cage. Finally, the detection personnel can calculate the buried length of the entire steel cage according to the received echo information and the propagation speed of ultrasonic waves in different types of threaded steel bars and connected steel sleeves obtained by previous testing. Moreover, during the entire measurement process, compared with the existing steel cage buried depth detection device, since the utility model utilizes the principle that when ultrasonic waves propagate in the pile foundation hole, the acoustic characteristics and internal tissue changes of the detected steel cage and the rock and soil layer inside the pile foundation hole will have a certain impact on the propagation of ultrasonic waves, the utility model has the excellent characteristics of recyclability, low cost, high efficiency, simple use, non-destructive operation, low construction environment requirements, etc., and there is no need to increase additional costs such as detection drilling.

[0007] Furthermore, when the number of sections of the steel cage is greater than one, two adjacent sections of the steel cage are connected together by a steel connecting sleeve, and the steel connecting sleeve can adopt a common structure on the market.

[0008] Furthermore, the steel bar connecting sleeve is a straight thread connecting sleeve, and both ends of the straight thread connecting sleeve are respectively connected to the corresponding steel bar threads to achieve the connection between two adjacent steel bar cages.

[0009] Furthermore, the steel bar connecting sleeve is an axial cold-extruded steel bar connecting sleeve, and the two ends of the axial cold-extruded steel bar connecting sleeve are respectively extruded and connected together with the corresponding steel bars to achieve the connection between two adjacent steel bar cages.

[0010] Further, the steel bar connection sleeve is a radial cold extruded steel bar connection sleeve, and the two ends of the radial cold extruded steel bar connection sleeve are respectively extruded and connected to the corresponding steel bars to achieve the connection between two adjacent steel bar cages. In addition, it can also adopt other steel bar connection sleeves or other steel bar connection forms.

[0011] Furthermore, it also includes a fixed bracket, one end of which is provided with a steel bar connector, which can be installed together with the steel bar; the other end of the fixed bracket is provided with a terminal connector, which can be installed together with the self-emitting and self-retracting ultrasonic probe, and the connection between the steel bar connector and the steel bar and the connection between the terminal connector and the self-emitting and self-retracting ultrasonic probe are preferably equipped with a clamp structure; that is, the steel bar connector and the terminal connector are preferably equipped with clamps.

[0012] It can be seen from the above technical scheme that the utility model has the following advantages: compared with the existing steel cage buried depth detection device, since the utility model adopts the ultrasonic detection principle, the utility model has the excellent characteristics of recyclability, low cost, high efficiency, simple use, non-destructive operation, low construction environment requirements, etc., and there is no need to increase additional detection drilling costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the technical solution of the utility model, the drawings required for use in the description will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0014] Figure 1 It is a structural schematic diagram of a specific implementation method of the utility model;

[0015] Figure 2 This is a schematic diagram of the structure of the axial cold-extruded steel bar connecting sleeve in the utility model;

[0016] Figure 3 This is a schematic diagram of the structure of the straight thread connection sleeve in the utility model;

[0017] Figure 4 It is a schematic structural diagram of the radial cold-extruded steel bar connecting sleeve in the utility model.

[0018] In the figure: 1. Steel bar cage; 2. Ultrasonic detector; 3. Steel bar connecting sleeve. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0020] like Figures 1 to 4As shown, the utility model provides an ultrasonic depth detection device for pile foundation steel cages, which includes a steel cage 1 buried in a pile foundation hole, and when the number of sections of the steel cage 1 is greater than one, two adjacent sections of the steel cage 1 are connected together by a steel connecting sleeve 3, and the steel connecting sleeve 3 can adopt other steel connecting sleeves or other steel connection forms commonly seen on the market, such as straight threaded connecting sleeves, axial cold-extruded steel connecting sleeves, radial cold-extruded connecting sleeves, etc.

[0021] It also includes an ultrasonic detector 2, which is provided with a self-emitting and self-receiving ultrasonic probe capable of emitting and receiving ultrasonic waves. The self-emitting and self-receiving ultrasonic probe can be located above one of the steel bars in the steel cage 1 and emit ultrasonic waves toward the steel bar.

[0022] At this time, when it is necessary to detect the buried depth of the steel cage 1, the utility model can first place the ultrasonic detector 2 above one of the steel bars of the steel cage 1, and then control the ultrasonic detector 2 to emit ultrasonic waves downward, and control the self-transmitting and self-receiving ultrasonic probe to receive the echo reflected from the bottom surface of the pile after penetrating the steel bars and connectors in the steel cage 1. Finally, the detection personnel can calculate the buried length of the entire steel cage 1 based on the received echo information and the propagation speed of the ultrasonic wave in different types of threaded steel bars and connected steel sleeves obtained in advance.

[0023] Based on this, compared with the existing steel cage buried depth detection device, since the utility model utilizes the principle that when ultrasonic waves propagate in the pile foundation hole, the acoustic characteristics and internal tissue changes of the detected steel cage 1 and the rock and soil layer inside the pile foundation hole will have a certain impact on the propagation of ultrasonic waves, the utility model has the excellent characteristics of recyclability, low cost, high efficiency, simple use, non-destructive operation, low construction environment requirements, etc., and there is no need to increase additional costs such as detection drilling.

[0024] In addition, as a preference, in order to reduce the labor intensity of the detection personnel and ensure the verticality of the ultrasonic wave emitted by the ultrasonic detector 2, the utility model also includes a fixed bracket, and a steel bar connector is provided at one end of the fixed bracket, so that the steel bar connector can be installed together with the steel bar; the other end of the fixed bracket is provided with an end connector, so that the end connector can be installed together with the spontaneous self-collecting ultrasonic probe, and the connection between the steel bar connector and the steel bar and the connection between the end connector and the spontaneous self-collecting ultrasonic probe are preferably equipped with a clamp structure; that is, the steel bar connector and the end connector are preferably equipped with a clamp, so that when the ultrasonic detector 2 is used to measure the steel cage 1, the utility model can assist in positioning the relative position relationship between the spontaneous self-collecting ultrasonic probe and the steel bar through the steel bar connector and the end connector on the fixed bracket, so as to ensure that the ultrasonic wave emitted by the spontaneous self-collecting ultrasonic probe can propagate along the length direction of the steel cage.

[0025] In addition, it should be noted that the ultrasonic detector 2 mentioned in the utility model is a common and mature equipment on the market, and the ultrasonic calculation and processing method mentioned is a mature calculation method on the market, such as the ultrasonic detection system mentioned in CN208443459U, and it can directly apply common ultrasonic detectors, ultrasonic flaw detectors, etc. on the market.

[0026] The terms "first", "second", "third", "fourth", etc. (if any) in the specification and claims of the present utility model and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the utility model described here can be implemented in an order other than those illustrated or described here. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions.

[0027] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An ultrasonic depth detection device for pile foundation steel cage, comprising a steel cage; characterized in that: It also includes an ultrasonic detector, which is provided with a self-emitting and self-receiving ultrasonic probe capable of emitting and receiving ultrasonic waves, and the self-emitting and self-receiving ultrasonic probe can be located above one of the steel bars in the steel cage.

2. The ultrasonic depth detection device for pile foundation reinforcement cage according to claim 1 is characterized in that: When the number of sections of the steel cage is greater than one, two adjacent sections of the steel cage are connected together by a steel connecting sleeve.

3. The ultrasonic depth detection device for pile foundation reinforcement cage according to claim 2 is characterized in that: The steel bar connecting sleeve is a straight thread connecting sleeve, and both ends of the straight thread connecting sleeve are respectively connected to the corresponding steel bar threads.

4. The ultrasonic depth detection device for pile foundation reinforcement cage according to claim 2 is characterized in that: The steel bar connection sleeve is an axial cold-extruded steel bar connection sleeve, and the two ends of the axial cold-extruded steel bar connection sleeve are respectively extruded and connected to the corresponding steel bars.

5. The ultrasonic depth detection device for pile foundation reinforcement cage according to claim 2 is characterized in that: The steel bar connection sleeve is a radial cold-extruded steel bar connection sleeve, and the two ends of the radial cold-extruded steel bar connection sleeve are respectively extruded and connected together with the corresponding steel bars.

6. The ultrasonic depth detection device for pile foundation reinforcement cage according to any one of claims 1 to 5, characterized in that: It also includes a fixed bracket, one end of which is provided with a steel bar connector, which can be installed together with the steel bar; the other end of the fixed bracket is provided with a terminal connector, which can be installed together with a self-emitting and self-retracting ultrasonic probe.

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