Pile foundation forming quality measuring device

Abstract

The utility model discloses a pile foundation forming quality measuring device which solves the problem that in the prior art, a testing head cannot pass through smoothly due to deformation of a pipe body caused by insufficient ring stiffness of a sounding pipe. The device comprises a sounding guide pipe, a transmitting module, a receiving module, a sounding analyzer and a composite cable, the sounding guide pipe is a composite pipe composed of a core pipe and an outer coating layer, the core pipe is in a U shape composed of a bending part at the bottom and two vertical parts at the upper part, the outer coating layer made of a steel fiber reinforced concrete material covers the outer sides of the vertical parts of the core pipe, and the outer coating layer is made of a steel fiber reinforced concrete material. And the transmitting module and the receiving module are respectively arranged in two vertical part tube cavities of the same core tube and are in sliding fit in the tube along the height direction under the matching of the guide bulge and the guide groove. The composite pipe enhances the rigidity of the sounding guide pipe and avoids the problem of pipe wall deformation occurring when concrete is poured in a pile hole, so that smooth passing of the transmitting module and the receiving module is guaranteed, jamming is avoided, and the measurement process is conducted smoothly.

Description

Technical Field

[0001] The utility model relates to the technical field of safe construction of expressways. Background Art

[0002] The acoustic detection tube can detect hidden underground structures, such as the quality of pile foundation molding. By analyzing the reflection of sound waves, potential problems can be identified, such as whether there is a concrete interlayer in the pile foundation.

[0003] The detection principle is that an acoustic detection tube is buried in the pile hole in advance during construction. After the concrete is poured, the transmitting module and the receiving module are placed in two oppositely arranged acoustic detection tubes, that is, the transmitting module and the receiving module start from the bottom of two opposite acoustic detection tubes, and the transmitting module emits high-frequency signals while rising in one acoustic detection tube. The high-frequency signal passes through the concrete and is obtained by the receiving module that moves synchronously in the other acoustic detection tube. The obtained data is output to the acoustic analyzer on the ground through a composite cable for sound analysis. The principle of sound analysis is that as the two modules are lifted along the pile body, the ultrasonic pulses of each measuring point are measured in turn to pass through the concrete between the two pipes. The relative changes in the parameters such as the acoustic time, amplitude and frequency transmitted by the ultrasonic wave in the concrete medium are measured to detect the defect position and defect type of the concrete between the acoustic detection tubes, for example, when the pile body is sandwiched with mud and causes concrete interlayers.

[0004] The existing pile foundation forming measurement device has the problem that the acoustic tube is not rigid enough and is easily deformed and moved, which is reflected in the change of roundness of the acoustic tube and the change of position during the pouring of concrete. For example, CN215330073U discloses an acoustic tube anti-slip installation device, the technical principle of which is that a fixed ring welded on the main reinforcement is provided at the lower part of the acoustic tube; a steel bar hook is hooked between the stirrup and the steel bar bottom support to prevent the sound tube from moving.

[0005] For example, CN207760895U discloses a high-strength plastic acoustic detection tube, including an acoustic detection tube bottom tube, a bottom tube fixing plate fixedly arranged on the top of the acoustic detection tube bottom tube, a bottom tube threaded interface fixedly arranged on the top of the acoustic detection tube bottom tube, an acoustic detection tube threadedly connected with an acoustic detection tube, an acoustic detection tube fixing chassis arranged at the bottom of the acoustic detection tube, a pipe top fixing plate fixedly arranged on the top of the acoustic detection tube, an acoustic detection tube threaded interface fixedly arranged on the top of the pipe top fixing plate, a top cover fixedly arranged on the bottom of the acoustic detection tube top cover, and a first plastic layer fixedly arranged on the outer wall of the acoustic detection tube. The utility model solves the problem that the traditional acoustic detection tube is a steel thin-walled acoustic detection tube, and although the steel material has sufficient mechanical strength, it is easy to deform after being subjected to strong external pressure, resulting in the problem that the acoustic detection tube cannot be used. After testing, the strength of the acoustic detection tube made of engineering plastic material is still insufficient, and it still deforms after being subjected to strong external pressure.

[0006] At the same time, after the measurement work is completed, the inner cavity of the acoustic detection tube needs to be sealed with mortar. The existing acoustic detection tube is a blind tube with a sealed lower end and a smaller diameter than the pile body. Therefore, there is still a risk of internal air suffocation during the secondary mortar filling and sealing process, resulting in local voids in the tube. Utility Model Content

[0007] In order to solve the shortcomings of the prior art, the utility model provides a pile foundation molding quality measuring device to solve the problem in the prior art that the test head cannot pass smoothly due to the deformation of the tube body caused by the insufficient ring stiffness of the acoustic detection tube itself, and at the same time solves the problem of low molding quality of the subsequent secondary mortar pouring.

[0008] The technical solution adopted by the utility model to solve its technical problems is:

[0009] The pile foundation forming quality measuring device comprises an acoustic detection conduit, a transmitting module, a receiving module, an acoustic detection analyzer and a composite cable, wherein the transmitting module and the receiving module are electrically connected to the acoustic detection analyzer through the composite cable respectively, and is characterized in that:

[0010] The acoustic detection catheter is a composite tube consisting of a core tube and an outer covering layer, wherein the core tube is U-shaped consisting of a bent portion at the bottom and two vertical portions at the top, the core tube is an injection-molded tube made of PVC or PE, two symmetrical guide protrusions are arranged on the inner wall of the core tube, the outer side of the vertical portion of the core tube is covered with an outer covering layer of steel fiber concrete material, the transmitting module and the receiving module are cylindrical structures and are provided with guide grooves on the side, the transmitting module and the receiving module are respectively placed in the two vertical portion cavities of the same core tube and slide in the tube along the height direction with the cooperation of the guide protrusions and the guide grooves.

[0011] Furthermore, the acoustic detection duct is installed in the inner cavity of the steel cage and is tied and connected at the top.

[0012] Furthermore, there are two core tubes arranged in a cross shape, and a cross is used to fix and support the two core tubes.

[0013] Furthermore, the thickness of the steel fiber concrete is not less than 20 mm.

[0014] Furthermore, the transmitting module and the receiving module have the same appearance and size to form a standardized module, which is interchangeable.

[0015] Furthermore, the sound wave generator and the sound wave receiver inside the transmitting module and the receiving module are arranged relative to each other.

[0016] Furthermore, it also includes an electric lifting mechanism, the upper section of the composite cable is wound on a rope drum or a rope shaft of the electric lifting mechanism, and the electric lifting mechanism synchronously lifts the two transmitting modules and the receiving module.

[0017] The beneficial effects of the utility model are:

[0018] The device changes the acoustic detection conduit from a thin-walled steel pipe or plastic pipe to a plastic and concrete composite pipe. The composite pipe enhances the rigidity of the acoustic detection conduit and avoids the problem of pipe wall deformation when pouring concrete in the pile hole, thereby ensuring the smooth passage of the transmitting module and the receiving module, avoiding jamming, and allowing the measurement process to proceed smoothly.

[0019] The acoustic detection conduit has protrusions or ribs to guide the two modules, avoid the rotation of the modules, and ensure the accuracy of the measurement. The advantages of the device are further explained below in conjunction with specific embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a diagram of the core tube structure of the acoustic detection catheter.

[0021] Figure 2 This is the overall structural diagram of the acoustic detection duct.

[0022] Figure 3 This is the working layout diagram of the pile foundation forming measurement device.

[0023] Figure 4 This is a partial enlarged view of the acoustic detection duct.

[0024] Figure 5 This is the structural diagram of the transmitter module.

[0025] In the figure:

[0026] 100 acoustic detection conduit, 110 core tube, 111 guide protrusion, 112 bending part, 120 outer covering layer, 130 cross,

[0027] 200 launch module, 210 guide groove,

[0028] 300 receiving modules,

[0029] 400 acoustic analyzer,

[0030] 500 composite cable,

[0031] 600 electric lifting mechanism

[0032] 00 pile hole, 01 steel cage. DETAILED DESCRIPTION

[0033] The pile foundation forming quality measuring device in this embodiment mainly consists of an acoustic detection conduit 100, a transmitting module 200, a receiving module 300, an acoustic detection analyzer 400, and a composite cable 500. It is lifted in conjunction with an electric lifting mechanism 600 to achieve synchronous lifting of the two modules, thereby ensuring the consistency of lifting. Figure 1 To Attachment Figure 5 Provide a detailed explanation, especially a detailed explanation of the innovations that may be involved in the implementation process.

[0034] The acoustic detection catheter 100 is one of the innovative points of the present technology. Specifically, the acoustic detection catheter 100 is a composite tube composed of a core tube 110 and an outer covering layer 120, wherein the core tube is an injection-molded tube made of PVC or PE. This core tube material has a good extrusion molding effect and can be obtained by mold opening and extrusion molding as needed. Two symmetrical guide protrusions 111, also called guide ribs, are arranged on the inner wall of the core tube to guide the transmitting module and the receiving module during the lifting process. It is ensured that the generators and receivers of the two modules are always relative to each other during the lifting process to ensure the accuracy of the measurement results.

[0035] During installation, the two core tubes are bent 180 degrees to form a U-shaped bending portion 112 at the bending portion, the diameter of which is slightly smaller than the inner diameter of the steel cage installed inside before the pile foundation is formed, so that it can be installed in the space inside the steel cage.

[0036] The two core tubes 110 are arranged in a cross shape and supported by a cross 130 therebetween to form a complete cross structure. With the support of the cross, the positions of the two core tubes are relatively fixed.

[0037] The outer side of the vertical part of the two core tubes is covered with a layer of steel fiber concrete. The so-called steel fiber concrete refers to a special concrete formed by adding steel fibers to high-strength concrete. After solidification, the steel fiber concrete forms an outer covering layer, such as an outer covering layer with a thickness of 20 mm. The existence of the outer covering layer 120 not only protects the extruded core tube inside, but also improves the overall rigidity of the core tube. This overall rigidity includes the vertical rigidity and circumferential rigidity of the core tube, and the outer covering layer 120 is a steel fiber concrete material, which has the characteristic of anti-cracking.

[0038] During installation, the acoustic tube 100 is inserted from top to bottom into the steel cage in the pile hole, wherein the bottom of the acoustic tube abuts against the bottom of the pile hole, and the acoustic tube and the steel cage are simply tied together.

[0039] The transmitting module 200 and the receiving module 300 have the same appearance profile and size, which is convenient for standardization. Both modules are cylindrical structures with a fixing hole 220 on the top for fixing and connecting the composite cable. The difference is that there are two modules, one with a sound wave generator installed inside and the other with a sound wave receiver installed inside. Among them, the sound wave transmitter generates sound waves of a specific frequency. During the propagation of these sound waves in the concrete, they encounter media of different densities, thereby producing different degrees of reflection, scattering or transmission. The sound wave receiver is responsible for capturing these sound waves that penetrate the concrete and transmitting the data to the acoustic analyzer on the ground for further processing and analysis, thereby obtaining a series of information about the concrete pile foundation.

[0040] The cylinders of the transmitting module and the receiving module are provided with guide grooves 210 for matching with the guide ribs in the acoustic detection duct. This matching ensures that the transmitting module and the receiving module are always arranged relative to each other, meets the directionality of the acoustic wave transmission, and avoids inaccurate measurement data caused by the change of the relative position of the two modules.

[0041] The transmitting module and receiving module are connected to the acoustic analyzer 400 through a composite cable 500, and the upper section of the composite cable is wound around the rope drum or rope shaft of the electric lifting mechanism 600, and the two transmitting modules and the receiving module are lifted synchronously by the electric lifting mechanism 600.

[0042] The method of using the pile foundation forming measurement device corresponding to this embodiment is as follows:

[0043] First, make the acoustic detection duct 100 on site, ensure that the length of the acoustic detection duct 100 is slightly longer than the hole depth of the pile hole 00, and ensure that the outer diameter of the acoustic detection duct 100 is slightly smaller than the inner diameter of the steel cage in the pile hole, then slowly put the acoustic detection duct 100 into the pile hole through the lifting equipment, and ensure that it touches the ground. Finally, use steel wire to simply tie the top of the acoustic detection duct 100 and the steel cage 01, and seal the pipe mouth of the above-mentioned acoustic detection tube with a rubber plug to prevent the entry of debris, and then set it aside.

[0044] The second step is to pour commercial concrete into the pile hole and form a reinforced concrete pile body after curing.

[0045] The third step is to assemble the electric lifting mechanism 600 and fix the electric lifting mechanism 600 on the equipment platform at the pile hole, wind the upper section of the composite cable around the rope drum or rope shaft of the electric lifting mechanism 600, connect the transmitting module and the receiving module to the acoustic analyzer 400 through the composite cable, and insert the two transmitting modules and the receiving module into the inner cavities of the two core tubes that are set 180 degrees opposite to each other. During installation, ensure that the receiving surfaces and the transmitting surfaces of the two modules are set opposite to each other, and slowly lower the two modules to the bottom of the core tube for use.

[0046] In the fourth step, the two transmitting modules and the receiving module are synchronously lifted by the electric lifting mechanism 600, wherein the acoustic wave transmitter generates acoustic waves of a specific frequency, which encounter different density media during the propagation process in the concrete, thereby generating different degrees of reflection, scattering or transmission. The acoustic wave receiver is responsible for capturing these acoustic waves that penetrate the concrete and transmitting the data to the acoustic analyzer on the ground for further processing and analysis, thereby obtaining a series of information about the concrete pile foundation.

[0047] The fifth step is to test another set of core tubes so that each pile body can be effectively measured in the horizontal and vertical directions, forming a three-dimensional measurement effect to ensure the accuracy of the measurement.

[0048] The sixth step is to take out the transmitting module and receiving module if there are no defects after the measurement is completed, connect the orifice of one of the core tubes to the grouting equipment, and flow mortar into it. The mortar flows from top to bottom, bypasses the U-bend, and then flows from bottom to top and finally flows out from the orifice of the core tube on the other side that is relatively set. When the overflow comes out, remove it and perform synchronous grouting on the other core tube. After the grouting is completed, remove the grouting equipment and complete the measurement of the pile foundation.

[0049] The embodiments described above are merely descriptions of preferred implementations of the present invention and are not intended to limit the scope of the present invention. Without departing from the design spirit of the present invention, various modifications and improvements to the present invention by relevant technical personnel in the field should fall within the scope of protection determined by the claims of the present invention.

Claims

1. A pile foundation forming quality measuring device, comprising an acoustic detection conduit (100), a transmitting module (200), a receiving module (300), an acoustic detection analyzer (400), and a composite cable (500), wherein: The transmitting module and the receiving module are electrically connected to the acoustic analyzer through a composite cable, and are characterized in that the acoustic detection catheter (100) is a composite tube composed of a core tube (110) and an outer covering layer (120), wherein the core tube is a U-shaped tube composed of a bent portion (112) at the bottom and two vertical portions at the top, the core tube is an injection-molded tube made of PVC or PE material, two symmetrical guide protrusions are arranged on the inner wall of the core tube, and the outer side of the vertical portion of the core tube is covered with an outer covering layer of steel fiber concrete material, the transmitting module and the receiving module are cylindrical structures and are provided with guide grooves on the side, the transmitting module and the receiving module are respectively placed in the two vertical portion cavities of the same core tube and slide in the tube along the height direction under the cooperation of the guide protrusions and the guide grooves.

2. The pile foundation forming quality measuring device according to claim 1, characterized in that: The acoustic detection duct is installed in the inner cavity of the steel cage and is tied and connected at the top.

3. The pile foundation forming quality measuring device according to claim 2, characterized in that: There are two core tubes, which are arranged in a cross shape and supported by a cross between the two.

4. The pile foundation forming quality measuring device according to claim 3, characterized in that: The thickness of the steel fiber concrete is not less than 20 mm.

5. The pile foundation forming quality measuring device according to claim 1, characterized in that: The transmitting module and the receiving module have the same appearance and size to form a standardized module, which is interchangeable.

6. The pile foundation forming quality measuring device according to claim 5, characterized in that: The sound wave generator and the sound wave receiver inside the transmitting module and the receiving module are arranged opposite to each other.

7. The pile foundation forming quality measuring device according to claim 1, characterized in that: It also includes an electric lifting mechanism, the upper section of the composite cable is wound on a rope drum or a rope shaft of the electric lifting mechanism, and the electric lifting mechanism synchronously lifts the two transmitting modules and the receiving module.

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