CN111456121A - Method for nondestructive detection of bridge pile foundation defects - Google Patents
Method for nondestructive detection of bridge pile foundation defects Download PDFInfo
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- CN111456121A CN111456121A CN202010300113.9A CN202010300113A CN111456121A CN 111456121 A CN111456121 A CN 111456121A CN 202010300113 A CN202010300113 A CN 202010300113A CN 111456121 A CN111456121 A CN 111456121A
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D33/00—Testing foundations or foundation structures
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Abstract
The invention provides a method for nondestructive detection of bridge pile foundation defects, and relates to the technical field of bridge pile foundation detection. The method for nondestructive detection of the defects of the bridge pile foundation comprises the following steps: s1, cleaning and leveling the detection surface of the bridge pile foundation, S2, taking three sounding pipes, leading the three sounding pipes to go deep into the bridge pile foundation, S3, measuring the inner distance, the exposed length, the diameter and the like of the outer walls of the three sounding pipes, S4, setting measuring parameters on a host, S5, filling the three sounding pipes with clear water, testing the smoothness degree of the sounding pipes, S6, placing a tripod, installing a uniform-speed lifting device, and S7, and starting to collect wave bands. According to the method for nondestructive detection of the defects of the bridge pile foundation, the influences of broken stones, sundries and the like on the detection wave band can be better reduced, the detection accuracy is improved, the transducer is lifted at a constant speed in the sound detection pipe through the constant-speed lifting device, the bridge pile foundation can be rapidly detected conveniently, and the detection accuracy and efficiency are improved.
Description
Technical Field
The invention relates to the technical field of bridge pile foundation detection, in particular to a method for nondestructively detecting defects of a bridge pile foundation.
Background
China is a developing country with mountains and dense population, and with the rapid development of society, more and more high-rise buildings and bridges appear like bamboo shoots in spring after rain. Due to the wide applicability of pile foundations, which are very commonly used in the above-mentioned buildings, a common pile foundation is composed of a bearing platform and one or more pile foundations, usually in the form of a large-diameter single pile foundation, mainly including cast-in-place bored piles and precast piles. The former is widely used in large-scale engineering.
In engineering, due to errors or non-standardization of personnel operation in the construction process or reasons of natural disasters, vehicle and ship accidents, water flow scouring and the like after construction, diseases such as necking, bending, segregation, holes, cracks, pile breakage and the like often occur in a pile foundation, and the diseases can directly influence the bearing capacity of the pile foundation and threaten human life and property and social safety, so that the defect detection of the constructed bridge pile foundation is necessary. The common detection method that goes on the bridge pile foundation has many kinds such as ultrasonic detection method, when using ultrasonic detection method, because various factor influence, there are many rubbles, debris etc. on the detection face of bridge pile foundation, can influence the detection data when examining, simultaneously when detecting, adopt artifical mode that promotes to carry out even promotion to the cable, in the use, unable accurate control at the uniform velocity promotes the cable, and then can lead to the data that detect not accurate enough.
Disclosure of Invention
The invention aims to provide a method for nondestructive testing of bridge pile foundation defects, which can effectively solve the problems in the background art.
In order to achieve the purpose, the invention is realized by the following technical scheme: a method for nondestructive detection of bridge pile foundation defects comprises the following steps:
s1, processing the bridge pile foundation detection surface to be clean and flat without loose layer, floating slurry, oil dirt, coating, honeycomb and pitted surface, removing the loose layer and sundries by using a grinding wheel, and removing residual powder and debris.
And S2, taking the three sound measuring tubes, penetrating the three sound measuring tubes into the bridge pile foundation, numbering the three sound measuring tubes, and recording on recording paper.
S3, measuring the inner distances of the outer walls of the three sounding pipes, measuring the exposed lengths of the three sounding pipes, measuring the outer diameters and the inner diameters of the three sounding pipes, and measuring the diameters of the sounding pipes by using the transducer, wherein the measuring result is accurate to mm.
S4, setting parameters such as project name, bridge pile foundation number and length of the bridge pile foundation on the host, and then setting the number of the sounding pipes and the data value measured by the sounding pipes on the host.
And S5, filling the three sounding pipes with clear water, and testing the smoothness of the sounding pipes.
S6, placing a tripod, installing a constant-speed lifting device, adjusting the direction of the tripod, aligning the wire outlet direction of the constant-speed lifting device to the pile foundation of the bridge to be measured, installing a pipe orifice pulley, placing the transducer into the constant-speed lifting device, and centering the transducer as much as possible.
Further, the method comprises the following steps: the transducers are placed into the sounding pipes according to the operation procedure in S6, and the three transducers are ensured to be deep into the bottoms of the three sounding pipes respectively.
Further, the method comprises the following steps: according to the operation step in S6, the scales of the cable on the uniform-speed lifting device are aligned with the scales of the pipe orifice of the sound detection pipe, the cable is placed into the pipe orifice pulley according to a certain sequence, the upper cover is pressed, and the cable is prevented from being wound.
Further, after S6, the method further includes the following steps:
s7, connecting the cable with the host, connecting the host connector with the corresponding numbering sounding pipe, clicking the collection button on the host after connection, and starting to collect the wave band.
Further, after S7, the method further includes the following steps:
and S8, lifting the transducer cable at a constant speed through the constant-speed lifting device until the transducer inside the sound detection pipe reaches the pipe orifice of the sound detection pipe, and completing the test.
Further, after S8, the method further includes the following steps:
and S9, after the test is finished, the host automatically stores the data, prints the data, and analyzes the printed wave band to judge the defect condition of the bridge pile foundation.
The invention provides a method for nondestructive detection of bridge pile foundation defects. The method has the following beneficial effects:
1. according to the method for nondestructive detection of the defects of the bridge pile foundation, the detection surface of the bridge pile foundation is cleaned and leveled, so that wave band data which influence detection by soil and stone sundries, surface loose layers, pitted surfaces, honeycombs and the like can be better prevented, and the detection accuracy is improved.
2. According to the method for nondestructive detection of the defects of the bridge pile foundation, the cable is lifted by adopting the uniform-speed lifting device, so that the transducer can ascend at a uniform speed in the sound detection pipe, the bridge pile foundation can be rapidly detected conveniently, and the detection accuracy and efficiency are improved.
Detailed Description
Example 1: the invention provides a technical scheme that: a method for nondestructive detection of defects of a bridge pile foundation comprises the following specific implementation steps:
step 1, cleaning and leveling the detection surface of the bridge pile foundation, wherein a loose layer, laitance, oil dirt, a coating, a honeycomb surface and a pitted surface are not available, the loose layer and impurities are removed by using a grinding wheel, and residual powder and debris are removed. The bridge pile foundation detection surface after processing can effectively reduce the influence of broken stones, sundries and the like on detection data, and improve the detection accuracy.
And 2, taking the three sounding pipes, enabling the three sounding pipes to penetrate into the bridge pile foundation, numbering the three sounding pipes, and recording on recording paper, so that the subsequent data can be analyzed and processed conveniently. The sound detecting pipe is the existing sound detecting pipe, the sound detecting pipe can detect the quality of a pile, the sound detecting pipe is the channel for the probe to enter the pile body when the bored concrete pile is subjected to the ultrasonic detection, and is an important component of the ultrasonic detection system of the bored concrete pile, the pre-embedding mode in the pile and the arrangement mode on the cross section of the pile directly influence the detection result, therefore, the arrangement and embedding mode of the sound detecting pipe is marked in the drawing when the pile to be detected is designed, the embedding quality and the thickness of the pipe wall are strictly controlled during construction, the detection work is ensured to be carried out smoothly, the number of the sound detecting pipes is set according to the pile diameter and the important degree, if the pile diameter of a single pile is below 1m, two sound detecting pipes are required to be set, if the pile diameter of a single pile is between 1m and 2m, three sound detecting pipes are required to be set, if the pile diameter of a single pile is above 2m, then just need to set up four sounding pipes according to relevant requirement, according to the particular case of engineering, can all pile foundations set up, also can some pile foundations set up, generally all use relevant design requirement as the standard.
And 3, measuring the inner distances of the outer walls of the three sounding pipes, measuring the exposed lengths of the three sounding pipes, measuring the outer diameters and the inner diameters of the three sounding pipes, measuring the diameters of the sounding pipes by using the transducer, wherein the measuring result is accurate to mm. The data to the sounding pipe are measured, and the data on the sounding pipe are stored in the host machine, so that the data are convenient to use when the bridge pile foundation is detected, and the data are input and then used for installing the position of the equipment. The transducer is a device for mutual conversion of electric energy and sound energy, is used in echo sounders, Doppler log and sound-related log, and is called as transmitting transducer for converting electric energy into sound energy, and is called as receiving transducer for converting sound energy into electric energy, and the transmitting transducer and the receiving transducer can be used separately or can be shared. The main performance indicators of the transducer are: the working frequency, frequency band width, electroacoustic frequency, impedance at resonance frequency, directivity (transmitting beam width) and sensitivity, etc. the acoustic pipes are pre-buried in the pile to be tested, the acoustic pipes are vertical and parallel to each other, the acoustic pipes are provided with ultrasonic pulse transmitting and receiving transducers, the medium of the coupling agent is clear water, ultrasonic pulses are emitted from a transmitting transducer of the instrument and pass through the pile to be measured, the received parameters such as sound time, wave amplitude, main frequency and the like can be judged after analysis, therefore, whether the concrete in the bridge pile body is complete or not is detected through comprehensive analysis, the degree of the defects of the pile foundation is judged and the position of the defects is determined, the two sounding pipes are usually combined into a group, under the coupling action of the clean water, after the pulse signal is sent out, the other transducers can accurately receive the signal and gradually rise to achieve the purpose of detecting the whole section.
And 4, setting and inputting parameters such as the number of the bridge pile foundation and the length of the bridge pile foundation on the host, so that workers can conveniently detect each bridge pile foundation, and confusion is prevented. The host computer is the device that bridge pile foundation defect was used, often will use when the defect detection, to this not too much repeated description to the host computer.
And 5, filling clear water into the three sounding pipes, testing the smoothness degree of the sounding pipes, and dredging the sounding pipes if the smoothness degree of the sounding pipes is not smooth when the sounding pipes are tested.
Step 6, place the tripod, install at the uniform velocity hoisting device, the direction of tripod has been adjusted, let the direction of being qualified for the next round of competitions of at the uniform velocity hoisting device aim at the bridge pile foundation of being surveyed, installation mouth of pipe pulley, put into the transducer, let the transducer be placed in the middle as far as possible, put into the sounding pipe with the transducer, guarantee that three transducer deepens the bottom of three sounding pipes respectively, the scale that will go up the cable at the uniform velocity hoisting device aligns with the scale of sounding pipe mouth of pipe department, put into the mouth of pipe pulley with the cable according to certain order, compress tightly the upper cover, prevent that the cable from twining. Through launching at the uniform velocity hoisting device, can make the cable rise at the uniform velocity to make the transducer follow the bottom of sounding pipe rise at the uniform velocity, reach the purpose of carrying out comprehensive detection to the bridge pile foundation. The tripod is a commonly-used device and is used for installing and fixing the position of equipment, and the uniform-speed lifting device can uniformly lift a cable.
And 7, connecting the cable with the host to enable the host connector to be connected with the corresponding numbered sounding pipe, clicking a collection button on the host after connection, starting to collect the wave band, detecting the bridge pile foundation in real time by the host, and observing the detection wave band on the host screen in real time by an operator when collecting the wave band.
And 8, lifting the transducer cable at a constant speed through the constant-speed lifting device, so that the transducer rises at a constant speed from the bottom of the sounding pipe until the transducer in the sounding pipe reaches the pipe orifice of the sounding pipe, and completing the test. In the use, can be convenient carry out comprehensive detection to the bridge pile foundation.
And 9, after the test is finished, the host can store the detected multiple wave bands, and after the data is printed and output, a user can conveniently observe the multiple wave bands for judging the defect condition of the bridge pile foundation. Meanwhile, the user can screen and store some abnormal wave bands on the host, so that subsequent observation and use are facilitated.
When the bridge pile foundation detection surface is provided with a large amount of broken stones and sundries, the bridge pile foundation detection surface can be cleaned and leveled through the step 1, so that the influence of the broken stones, the sundries and the like on the detection wave band is reduced, and the detection accuracy is improved. When the cable can not be lifted at a uniform speed better, the cable can be lifted at a uniform speed by adopting the uniform-speed lifting device through the steps 6-8, so that the transducer can be lifted at a uniform speed in the sounding pipe, and the aim of comprehensively detecting the bridge pile foundation is fulfilled.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various changes and modifications can be made without departing from the inventive concept of the present invention, and these changes and modifications are all within the scope of the present invention.
Claims (6)
1. A method for nondestructive detection of defects of a bridge pile foundation is characterized by comprising the following steps:
s1, cleaning and flattening the detection surface of the bridge pile foundation, removing a surface loose layer, laitance, oil dirt, a coating, a honeycomb surface, a pitted surface and the like, removing the loose layer and impurities by using a grinding wheel, and removing residual powder and debris;
s2, taking three sounding pipes, penetrating the three sounding pipes into the bridge pile foundation, and numbering and recording the three sounding pipes;
s3, measuring the inner distances of the outer walls of the three sound measuring tubes, wherein the measuring result is accurate to mm, measuring the exposed lengths of the three sound measuring tubes, the measuring result is accurate to mm, measuring the outer diameters and the inner diameters of the three sound measuring tubes, wherein the measuring result is accurate to mm, and then measuring the diameters of the sound measuring tubes by using a transducer;
s4, setting parameters such as an engineering name, a bridge pile foundation number and the length of a bridge pile foundation on the host, and then setting the number of the sounding pipes and the data values measured by the sounding pipes on the host;
s5, filling the three sounding pipes with clear water, and testing the smoothness degree of the sounding pipes;
s6, placing a tripod, installing a constant-speed lifting device, adjusting the direction of the tripod, aligning the wire outlet direction of the constant-speed lifting device to the pile foundation of the bridge to be measured, installing a pipe orifice pulley, placing the transducer into the constant-speed lifting device, and centering the transducer as much as possible.
2. The method for nondestructive testing of a defect of a bridge pile foundation according to claim 1, comprising the steps of: the transducers are placed into the sounding pipes according to the operation procedure in S6, and the three transducers are ensured to be deep into the bottoms of the three sounding pipes respectively.
3. The method for nondestructive testing of a defect of a bridge pile foundation according to claim 1, comprising the steps of: according to the operation step in S6, the scales of the cable on the uniform-speed lifting device are aligned with the scales of the pipe orifice of the sound detection pipe, the cable is placed into the pipe orifice pulley according to a certain sequence, the upper cover is pressed, and the cable is prevented from being wound.
4. The method for nondestructive testing of a bridge pile foundation defect of claim 3, further comprising the following steps after S6:
s7, connecting the cable with the host, connecting the host connector with the corresponding numbering sounding pipe, clicking the collection button on the host after connection, and starting to collect the wave band.
5. The method for nondestructive testing of a bridge pile foundation defect of claim 4, wherein after S7, the method further comprises the following steps:
and S8, lifting the transducer cable at a constant speed through the constant-speed lifting device until the transducer inside the sound detection pipe reaches the pipe orifice of the sound detection pipe, and completing the test.
6. The method for nondestructive testing of a bridge pile foundation defect of claim 5, further comprising the following steps after S8:
and S9, after the test is finished, automatically storing the wave band data by the host, printing the data, analyzing the printed wave band, and judging the defect condition of the bridge pile foundation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010300113.9A CN111456121A (en) | 2020-04-16 | 2020-04-16 | Method for nondestructive detection of bridge pile foundation defects |
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| CN202010300113.9A CN111456121A (en) | 2020-04-16 | 2020-04-16 | Method for nondestructive detection of bridge pile foundation defects |
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| CN111456121A true CN111456121A (en) | 2020-07-28 |
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Cited By (3)
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| CN112814046A (en) * | 2020-12-31 | 2021-05-18 | 中济通(江苏)智能科技有限公司 | Bridge engineering foundation pile detection method |
| CN113404096A (en) * | 2021-05-24 | 2021-09-17 | 江西正德工程检测有限公司 | Nondestructive testing method and device for bridge pile foundation |
| CN113866277A (en) * | 2021-09-22 | 2021-12-31 | 合诚工程咨询集团股份有限公司 | Nondestructive testing method for pile forming quality of large-diameter secant pile |
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| CN113866277A (en) * | 2021-09-22 | 2021-12-31 | 合诚工程咨询集团股份有限公司 | Nondestructive testing method for pile forming quality of large-diameter secant pile |
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Application publication date: 20200728 |