阅读说明：本技术 一种基于电容法的套筒灌浆密实度检测装置及方法 (Sleeve grouting compactness detection device and method based on capacitance method ) 是由 唐孟雄 周治国 孙晓立 王洪业 杨军 胡贺松 周伍阳 卞德存 赵亚宇 邵继喜 赵 于 2020-05-09 设计创作，主要内容包括：本发明公开了一种基于电容法的套筒灌浆密实度检测装置及方法,通过在灌浆金属套筒内布置电容极性探头,以及外接的便携式智能测试仪激发电流信号在耐压防腐防水线缆和探头上传递,从而当电容极性探头周围介质发生变化,其测得的电容也会发生变化,进而通过便携式智能测试仪接收到的电容信号也发生变化,并在显示器上显示,最后保存于便携式智能测试仪的数据存储装置；最终通过无线网络进行检测数据远程传输与判别,从而有效检测出金属套筒内部灌浆饱满信息。相较于其他的检测方法,本发明不但检测精度高,而且便于实现,具有一定的使用价值。(The invention discloses a sleeve grouting compactness detection device and method based on a capacitance method, wherein a capacitance polarity probe is arranged in a grouting metal sleeve, and an external portable intelligent tester stimulates a current signal to be transmitted on a pressure-resistant anticorrosive waterproof cable and the probe, so that when a medium around the capacitance polarity probe changes, the measured capacitance also changes, and further, a capacitance signal received by the portable intelligent tester also changes, is displayed on a display, and is finally stored in a data storage device of the portable intelligent tester; and finally, remote transmission and judgment of detection data are carried out through a wireless network, so that the information of the fullness of the grouting inside the metal sleeve is effectively detected. Compared with other detection methods, the method has the advantages of high detection precision, convenience in implementation and certain use value.)

1. A sleeve grouting compactness detection device based on a capacitance method comprises a grouting metal sleeve (1), a pouring template (4), a portable intelligent tester (2) and a capacitance polarity probe (3); the device is characterized in that the capacitance polarity probe (3) penetrates through the grouting metal sleeve (1) from top to bottom to the bottom of the grouting metal sleeve (1); the capacitance polar probe (3) has the characteristics of no water adhesion and no dry and wet concrete adhesion; the capacitance polarity probe (3) penetrates through the pouring template (4) through a pressure-resistant anticorrosive waterproof cable (5) to be connected to the portable intelligent tester (2); the pouring template (4) has a waterproof function; the portable intelligent tester (2) can detect the capacitance value of the grouting metal sleeve (1) corresponding to the capacitance polarity probe (3) in real time and record the capacitance value.

2. The device for detecting the grouting compactness of the sleeve based on the capacitance method according to claim 1, wherein the grouting metal sleeve (1) comprises a hollow metal sleeve (11), a rubber plug (12), embedded steel bars (14), connecting steel bars (15) and a rubber plug (16); the upper side and the lower side of the hollow metal sleeve (11) are respectively provided with a grout outlet (111) and a grout filling port (112); the embedded steel bars (14) and the connecting steel bars (15) are respectively embedded in the upper end and the lower end of the hollow metal sleeve (11); the rubber plug (16) is plugged in the grout outlet (111); the rubber plug (12) is connected to the top of the hollow metal sleeve (11).

3. The device for detecting the grouting compactness of the sleeve based on the capacitance method according to claim 2, wherein the rubber plug (12) is provided with a through hole for the embedded steel bar (14) and the capacitance polarity probe (3) to penetrate through; and the rubber plug (12) is provided with a copper sheet (161) for connecting the hollow metal sleeve (11) and the pressure-resistant, corrosion-resistant and waterproof cable (5).

4. The device for detecting the grouting compactness of the sleeve based on the capacitance method according to claim 2, is characterized in that: the metal hose penetrates through the pouring template (4) from the outside to the inside of the metal sleeve; the pressure-resistant, anti-corrosion and waterproof cable (5) penetrates through the metal hose.

5. The device for detecting the grouting compactness of the sleeve based on the capacitance method according to claim 2, is characterized in that: the installation mode of the capacitance polarity probe (3) comprises 3 types: the top rubber plug (12) can be inserted into the hollow metal sleeve (11), the rubber plug (16) can enter the hollow metal sleeve (11) from the grout outlet (111), and the rubber plug can be connected with the connecting steel bar (15) in parallel and then inserted into the hollow metal sleeve (11).

6. The device for detecting grouting compactness of the sleeve based on the capacitance method according to any one of claims 1 to 5, is characterized in that: except for the connection part of the capacitance polarity probe (3) and the pressure-resistant, anti-corrosion and waterproof cable (5), the surfaces of the rest parts of the capacitance polarity probe (3) are coated with hydrophobic materials; the hydrophobic coating material has the characteristics of no water adhesion and no dry and wet concrete adhesion.

7. The device for detecting the grouting compactness of the sleeve based on the capacitance method according to claim 6, is characterized in that: the capacitance polarity probe (3) adopts 200-400-mesh irregular quartz sand for sand blasting treatment.

8. The device for detecting the grouting compactness of the sleeve based on the capacitive method according to claim 6, wherein the hydrophobic material is a polysilazane-modified material; the polysilazane modified material comprises 10 parts of polysilazane, 0.4 part of silane coupling agent, 0.2 part of silicon dioxide and 0.08 part of perfluoropolyether in parts by weight; after the sand blasting process is finished, the polysilazane modified material is sintered on the capacitance polar probe (3) by using tetrafluoroethylene.

9. The sleeve grouting compactness detection method based on the capacitance method is characterized in that any one device is used for detecting the grouting metal sleeve (1) according to the following steps:

firstly, inserting a capacitance polarity probe (3) into the bottom of a hollow metal sleeve (11); then, the capacitance polarity probe (3) is sequentially connected with the pouring template (4) and the portable intelligent tester (2) through a pressure-resistant, corrosion-resistant and waterproof cable (5);

secondly, opening the portable intelligent tester (2), observing the capacitance value of each capacitance polarity probe (3) before grouting, and setting a threshold range;

grouting the hollow metal sleeve (11), and recording the capacitance value change condition measured by the capacitance polarity probe (3) in the process of slurry liquid level rising in the hollow metal sleeve (11);

if the capacitance value measured by the capacitance polarity probe (3) at a certain depth in the grouting metal sleeve (1) is increased to a set threshold value range, the position is fully grouted; if the capacitance value measured by the capacitance polarity probe (3) is not increased to the set threshold value range at the end of grouting, grout at the position is not full; if the capacitance value measured by the capacitance polarity probe (3) is increased to a set threshold value range at the end of grouting and then is restored to the capacitance value before grouting, the liquid level of the slurry at the position falls back, and the grouting is not full.

And fifthly, if the fullness of the grouting metal sleeve (1) is found to have defects, recording the engineering code on the surface of the grouting metal sleeve (1), and simultaneously recording and storing the engineering code of the defective grouting metal sleeve (1) in the portable intelligent tester (2) to provide detailed information for later reinforcing.

10. The method for detecting the grouting compactness of the sleeve based on the capacitance method according to claim 9, wherein the method comprises the following steps: the capacitance polarity probe (3) can be embedded in a plurality of positions in the hollow metal sleeve (11) according to the detection position requirement, and the embedding depth can be different.

Technical Field

The invention belongs to the field of assembled structure detection, and particularly relates to a sleeve grouting compactness detection device and method based on a capacitance method; in particular to a grouting material plumpness detection method which is suitable for vertical steel bar sleeve connecting joints and constraint slurry anchor lap joints in prefabricated columns and prefabricated walls of prefabricated concrete structures.

Background

Along with the rapid development of economy and urbanization in China, the building industrialization process is accelerated, and the traditional cast-in-place building technology cannot meet the development requirements of the building industry due to unreasonable resource allocation, low construction mechanization degree and poor construction operation environment. The assembly type building is a standardized green building form which is developed in recent years, efficient and rapid in construction, energy-saving and environment-friendly and has guaranteed quality, and the assembly type building receives attention from the building industry.

The earthquake resistance and integrity of the fabricated building are important influencing factors restricting the development of the fabricated building, and in order to improve the earthquake resistance and integrity of the fabricated building, reliable connection between fabricated building components needs to be ensured. The common assembly type building connection mode mainly comprises steel bar sleeve grouting connection, the integrity of the assembly type building is effectively guaranteed by the connection mode, the shock resistance of the assembly type building is correspondingly improved, and the assembly type building connection mode is widely applied to building structures such as prefabricated shear walls of buildings, assembled box girders of bridges, piers of bridges and the like.

The steel bar sleeve is mainly composed of an assembly type building component connecting steel bar and a sleeve. At present, the conventional method for detecting the grouting compactness degree in the grouting metal sleeve is to adopt methods such as unidirectional tension, high-stress repeated tension-compression test, large-deformation repeated tension-compression test and the like for a grouting metal sleeve connecting joint test piece; however, the defects of the sleeve grouting material are concealed, so that the concrete defect positions of the grouting metal sleeve cannot be well known by detecting the compaction degree of the sleeve grouting material by the conventional method, so that the constructor can be conveniently and pertinently reinforced. On the basis of a nondestructive detection method, the positions and the degrees of the defects of the compactness of the sleeve grouting material cannot be accurately judged by an ultrasonic method, an impact echo method, an infrared thermal imaging method and the like, and the detection precision is low; although the X-ray industrial CT method can clearly obtain the internal structure, compactness and defect distribution images of the grouting metal sleeve and realize the grouting compactness detection of the grouting metal sleeve, the method has the problems of excessively large and complicated test equipment and high manufacturing cost of detection instruments, and simultaneously, the methods also have the problems of ray radiation, environmental pollution and the like, which are harmful to human bodies, so the X-ray industrial CT method cannot be industrially applied.

Disclosure of Invention

In order to overcome the defects of the prior art, the invention provides a sleeve grouting compactness detection device and method based on a capacitance method.

The technical scheme adopted by the invention for solving the technical problems is as follows:

a sleeve grouting compactness detection device based on a capacitance method comprises a grouting metal sleeve, a pouring template, a portable intelligent tester and a capacitance polarity probe; the capacitance polarity probe penetrates through the grouting metal sleeve from top to bottom to the bottom of the grouting metal sleeve; the capacitance polar probe has the characteristics of no water adhesion and no dry-wet concrete adhesion; the capacitance polarity probe penetrates through the pouring template through a pressure-resistant anticorrosive waterproof cable to be connected with the portable intelligent tester; the pouring template has a waterproof function; the portable intelligent tester can detect the capacitance value of the grouting metal sleeve corresponding to the capacitance polarity probe in real time and record the capacitance value.

Further, the grouting metal sleeve comprises a hollow metal sleeve, a rubber plug, embedded steel bars, connecting steel bars and a rubber plug; the upper side and the lower side of the hollow metal sleeve are respectively provided with a grout outlet and a grout filling port; the embedded steel bars and the connecting steel bars are respectively embedded in the upper end and the lower end of the hollow metal sleeve; the rubber plug is plugged at the grout outlet; the rubber stopper is connected to the top of the hollow metal sleeve.

Further, the rubber plug is provided with a through hole for the embedded steel bar and the capacitor polarity probe to penetrate through; and the rubber plug is provided with a copper sheet for connecting the hollow metal sleeve and the pressure-resistant, anti-corrosion and waterproof cable.

The metal hose penetrates through the pouring template from the outside to the inside of the metal sleeve; the pressure-resistant, anti-corrosion and waterproof cable penetrates through the metal hose.

Further, the installation mode of the capacitance polarity probe has 3 types: inside accessible top rubber buffer inserted cavity metal sleeve, also accessible rubber end cap got into cavity metal sleeve from the grout outlet inside, also can insert cavity metal sleeve inside with connecting reinforcement parallelly connected back.

Furthermore, except for the connection part of the capacitance polarity probe and the pressure-resistant, anti-corrosion and waterproof cable, the surfaces of the rest parts of the capacitance polarity probe are coated with hydrophobic materials; the hydrophobic coating material has the characteristics of no water adhesion and no dry and wet concrete adhesion.

Further, the capacitance polarity probe adopts 200-400-mesh irregular quartz sand for sand blasting treatment.

Further, the hydrophobic material is a polysilazane modified material; the polysilazane modified material comprises 10 parts of polysilazane, 0.4 part of silane coupling agent, 0.2 part of silicon dioxide and 0.08 part of perfluoropolyether in parts by weight; and after the sand blasting process is finished, the polysilazane modified material is sintered on the capacitance polar probe by using tetrafluoroethylene.

Further, the grouting metal sleeve is detected by any one of the devices according to the following steps:

firstly, inserting a capacitance polarity probe into the bottom of a hollow metal sleeve; then, sequentially connecting the capacitance polarity probe with the pouring template and the portable intelligent tester through a pressure-resistant, corrosion-resistant and waterproof cable;

secondly, opening the portable intelligent tester, observing the capacitance value of each capacitance polarity probe before grouting, and setting a threshold range;

grouting the hollow metal sleeve, and recording the capacitance value change condition measured by the capacitance polarity probe in the process of rising the liquid level of the slurry in the hollow metal sleeve;

if the capacitance value measured by the capacitance polarity probe at a certain depth in the grouting metal sleeve is increased to be within a set threshold range, the grouting at the position is full; if the capacitance value measured by the capacitance polarity probe is not increased to the set threshold value range at the end of grouting, the grout at the position is not full; if the capacitance value measured by the capacitance polarity probe is increased to a set threshold value range when grouting is finished, and then the capacitance value is restored to the capacitance value before grouting, the liquid level of the slurry at the position falls back, and grouting is not full.

And fifthly, if the fullness of the grouting metal sleeve is found to have defects, recording the engineering code on the surface of the grouting metal sleeve, and simultaneously recording and storing the engineering code of the defective grouting metal sleeve in a portable intelligent tester, so as to provide detailed information for later reinforcing.

Furthermore, the capacitance polarity probe can be embedded in a plurality of positions in the hollow metal sleeve according to the detection position requirement, and the embedding depth can be different.

The invention has the beneficial effects that: the invention forms a current loop with a capacitance polarity probe through a portable intelligent tester; when the medium around the probe changes, the capacitance value measured by the probe also changes, and then is compared with the capacitance value range of the grouting material set by the intelligent tester, the grouting fullness result of the sleeve is given in real time, and finally the detection data is stored in the portable intelligent tester. Compared with the prior art, the invention has the advantages of low detection cost, convenient carrying of equipment and extremely high detection precision.

Drawings

The invention is further described with reference to the following figures and examples.

FIG. 1 is a schematic diagram of the general structure of the present invention;

FIG. 2 is a schematic structural view of the rubber stopper of the present invention;

FIG. 3 is a schematic view of a capacitor polarity probe penetrating through a rubber stopper according to the present invention;

fig. 4 is a schematic view of the structure of the rubber plug and the copper sheet of the invention.

Detailed Description

As shown in fig. 1-4, a sleeve grouting compactness detection device based on a capacitance method comprises a grouting metal sleeve 1, a pouring template 4, a portable intelligent tester 2 and a capacitance polarity probe 3; the capacitance polarity probe 3 penetrates through the pouring template 4 through a pressure-resistant anti-corrosion waterproof cable 5 to be connected to the portable intelligent tester 2, and the pouring template 4 has a waterproof function. The grouting metal sleeve 1 is composed of a hollow metal sleeve 11, a rubber plug 12, grouting materials, embedded steel bars 14, connecting steel bars 15 and a rubber plug 16; the upper side and the lower side of the hollow metal sleeve 11 are respectively provided with a grout outlet 111 and a grout inlet 112, the rubber plug 12 is positioned at the top of the hollow metal sleeve 11, and the rubber plug 12 is provided with a through hole for the embedded steel bar 14 and the capacitor polarity probe 3 to penetrate through; and the rubber plug 12 is provided with a copper sheet 161 for connecting the hollow metal sleeve 11 and the pressure-resistant, corrosion-resistant and waterproof cable 5. The capacitance polarity probe 3 penetrates through the through hole of the rubber plug 12 until reaching the inside of the cylinder body of the hollow metal sleeve 11; according to actual conditions, the electrode wire embedding mode of the invention has various modes. The capacitance polarity probe 3 can be embedded in the hollow metal sleeve 11, or can be embedded from the grout outlet 111 when the hollow metal sleeve 11 is grouted, or can be inserted into the hollow metal sleeve 11 after being bonded with the connecting steel bar 15. Embedded steel bars 14 and connecting steel bars 15 are respectively embedded at the upper end and the lower end in the hollow metal sleeve 11; after the capacitance polarity probe 3, the embedded steel bar 14 and the connecting steel bar 15 are installed in the hollow metal sleeve 11, the hollow metal sleeve 11 is filled with the grouting material entering from the grouting opening 112, the grouting opening 111 is blocked by the rubber plug 16, and the grouting material is solidified in the hollow metal sleeve 11; and the capacitance polarity probe 3 has the characteristics of no water adhesion and no dry and wet concrete adhesion.

In order to recycle the capacitance polarity probe 3, the grouting metal sleeve 1 further comprises a metal hose, and the metal hose penetrates through the pouring template 4 from the outside to the inside of the hollow metal sleeve 11; the pressure-resistant, corrosion-resistant and waterproof cable 5 passes through the metal hose.

The portable intelligent tester 2 consists of a capacitance testing and analyzing device, a display, a built-in power supply, a data storage device and an engineering code scanner; the grouting compactness detection information engineering code has the function of generating and printing grouting compactness detection information engineering code of the grouting metal sleeve 1, the capacitance value measured by the capacitance polarity probe 3 is obtained through a built-in capacitance testing and analyzing device and is displayed on a display of the grouting metal sleeve in real time, field test data can be stored in a data storage device of the grouting metal sleeve in real time or transmitted to a computer and a mobile phone end through a wireless network, the engineering code of the surface of a prefabricated part where the sleeve is located is scanned through an engineering code scanner, code scanning information is recorded, and grouting detection data and part information can be linked.

In this embodiment, except for the end of the capacitance polar probe 3, the surface of the electrode wire is coated with a hydrophobic material. The capacitance polarity probe 3 is firstly subjected to sand blasting treatment by using 200-400-mesh irregular quartz sand, so that the end part is ensured not to be subjected to sand blasting.

The hydrophobic material comprises the following components: the polysilazane modified material comprises 10 parts of polysilazane, 0.4 part of silane coupling agent, 0.2 part of silicon dioxide and 0.08 part of perfluoropolyether according to the parts by weight; the hydrophobic material composition can also be as follows: after the sand blasting process is finished, a special process is adopted, and tetrafluoroethylene is sintered on the electrode.

As shown in fig. 1 to 4, the sleeve grouting compactness detection device based on the capacitance method can detect the grouting metal sleeve 1 according to the following steps:

firstly, a hollow metal sleeve 11 is inserted into a capacitance polarity probe 3 through a top rubber plug 12, the upper part of the capacitance polarity probe 3 is connected with a pressure-resistant anticorrosive waterproof cable 5, and the pressure-resistant anticorrosive waterproof cable 5 is connected with the end of a portable intelligent tester 2 when an assembled concrete component is poured, and a component pouring template 4 is required to be led out;

before grouting the hollow metal sleeve 11, connecting the pressure-resistant, anticorrosive and waterproof cable 5 with the portable intelligent tester 2, starting up and observing the capacitance values of the capacitance polarity probes 3 before grouting, and setting a threshold range;

thirdly, grouting the hollow metal sleeve 11, and deducing the grouting fullness in the hollow metal sleeve 11 according to the capacitance value change condition measured by the capacitance polarity probe 3 in the process of slurry level rising in the hollow metal sleeve 11;

if the capacitance value measured by the capacitance polarity probe 3 at a certain depth in the hollow metal sleeve 11 is increased to be within a set threshold range, the position is fully grouted; if the capacitance value measured by the capacitance polarity probe 3 is not increased to the set threshold value range at the end of grouting, the grout at the position is not full; if the capacitance value measured by the capacitance polarity probe 3 is increased to a set threshold value range when grouting is finished, and then the capacitance value is restored to the capacitance value before grouting, the liquid level of the slurry at the position falls back, and grouting is not full.

When some assembled component detects and finds that the grouting fullness of the hollow metal sleeve 11 has defects, a code scanner of the intelligent tester is adopted to scan the engineering code pasted on the surface of the prefabricated component, the serial number of the defective component can be recorded and stored, and position information is provided for later reinforcing.

The above disclosure is only for the purpose of illustrating the preferred embodiments of the present invention, and it is therefore to be understood that the invention is not limited by the scope of the appended claims.