CN211927603U - Pore grouting compactness detection device - Google Patents
Pore grouting compactness detection device Download PDFInfo
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- CN211927603U CN211927603U CN202020322643.9U CN202020322643U CN211927603U CN 211927603 U CN211927603 U CN 211927603U CN 202020322643 U CN202020322643 U CN 202020322643U CN 211927603 U CN211927603 U CN 211927603U
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Abstract
The utility model discloses a closely knit degree detection device of pore canal grout relates to engineering construction quality and detects technical field, including pressure detection module and connection rope. A plurality of pressure detection modules are fixedly arranged on the connecting rope. The connecting rope is fixedly provided with a lead, and the lead is electrically connected with the pressure detection module respectively. The pressure detection module comprises a pressure sensor for detecting the pressure in the pore passage. The utility model discloses a fixed a plurality of pressure measurement module on a connection rope to couple together these for the pressure measurement module bus, each pressure measurement module can both realize 360 degrees pressure measurement. When in use, the porous pipe is distributed along the length direction of the pore canal and is arranged upwards. The utility model discloses a can accurately detect each insufficient position of slip casting and can accurately mark, its reasonable in design, the structure is ingenious, low cost, convenient operation, and stability is good, and is small, light in weight, portable, the equipment and the maintenance of also being convenient for have extensive popularization prospect.
Description
Technical Field
The utility model relates to an engineering construction quality detects technical field, concretely relates to closely knit degree detection device of pore canal grout.
Background
In recent years, with the vigorous development of infrastructure construction technology in China, prestressed concrete beams are widely applied to the construction of a large number of bridges due to the excellent characteristics of the prestressed concrete beams. The development of new technology is always accompanied with a series of technical problems to be solved urgently, wherein the prestressed duct grouting is a very critical process in the construction of prestressed concrete structures. If grouting defects and incompact pore canals exist, a protective layer cannot be formed around the steel strands, and then the steel strands in high tension are corroded too early, so that the overall effective prestress of the bridge is reduced, and the durability of the bridge is greatly influenced. Even breakage may occur, and in severe cases, a sudden safety accident may occur. Therefore, the grouting compactness of the prestressed duct is ensured, the prestressed reinforcing steel in the duct is prevented from being corroded prematurely, the good prestressed stress of the bridge is ensured, and the problems of construction control and detection are always serious problems. However, a systematic, rapid and effective method and technology are still lacking at home and abroad for detecting and evaluating the grouting compaction degree of the prestressed duct.
Since the pore grouting is of great significance to the prestressed concrete bridge in structure and durability, a series of researches have been developed at home and abroad for a long time, and some nondestructive testing methods are proposed, which can be roughly divided into:
an electromagnetic wave-based detection method; 2) an ultrasonic-based detection method; 3) detection methods based on radiation (X-ray, gamma ray, etc.); 4) a detection method based on a shock elastic wave. In the existing detection method, the detection methods based on various waves have respective defects, so that the result of low detection precision is caused. The detection method based on the electromagnetic waves is not suitable for iron sheet corrugated pipes and is also not suitable for the dense condition of the steel bars; and foreign related research also shows that the effectiveness of the impact echo method is not high when the key compactness of the plastic pore channel is detected. The other two methods also have the disadvantages of poor workability or low efficiency.
SUMMERY OF THE UTILITY MODEL
In order to solve the problems, the utility model provides a device for detecting the grouting compactness of a pore channel, which comprises a pressure detection module and a connecting rope;
the connecting rope is fixedly provided with a plurality of pressure detection modules;
the connecting rope is fixedly provided with wires which are respectively and electrically connected with the pressure detection module;
the pressure detection module comprises a pressure sensor for detecting the pressure in the pore passage.
Preferably, the pressure detection modules are arranged in line at equal intervals on the connecting rope;
at least two wires are fixedly arranged on the connecting rope and used for providing power supply and communication for the pressure detection module.
Preferably, the pressure detection module further comprises an elastic bag made of an elastic material;
the elastic bag comprises an inner cylinder and an outer cylinder, and the outer diameter of the inner cylinder is smaller than the inner diameter of the outer cylinder; the inner diameter of the inner cylinder can penetrate through the connecting rope;
the two ends of the inner cylinder are respectively connected with the two ends of the outer cylinder in a sealing way, the outer wall of the inner cylinder and the inner wall of the outer cylinder form a closed cavity, and liquid or gas is injected into the cavity;
the pressure sensor is fixed on the outer barrel, and a pressure detection part of the pressure sensor extends into the cavity and is used for detecting the pressure in the cavity.
Preferably, the pressure sensor comprises a sensing bin, an elastic sheet, a deformation sensing element, a supporting rod and a circuit board;
the induction bin is of a hollow cylindrical structure, and the top of the induction bin is open; the elastic sheet is hermetically arranged on the sensing bin, and the deformation sensing element is fixedly arranged on the bottom surface of the elastic sheet;
the bottom of the induction bin is fixedly provided with the supporting rod, and the bottom of the supporting rod is fixedly connected with the circuit board;
the circuit board is welded with a control unit;
the support rod penetrates through the outer barrel and extends the induction bin into the cavity.
Preferably, the control unit comprises a microcontroller and a communication module;
the deformation sensing element is electrically connected with the control unit;
the deformation sensing element is a resistance strain gauge.
Preferably, the pressure detection device further comprises a communication master station, wherein the communication master station is provided with a power line carrier communication master station module and is used for providing power for the pressure detection module and collecting signals;
the communication module is a power line carrier communication module.
Preferably, the elastic material is a silicone material.
The utility model discloses a fixed a plurality of pressure measurement module on a connection rope to couple together these for the pressure measurement module bus, each pressure measurement module can both realize 360 degrees pressure measurement. When in use, the porous pipe is distributed along the length direction of the pore canal and is arranged upwards. The utility model discloses a can accurately detect each insufficient position of slip casting and can accurately mark, its reasonable in design, the structure is ingenious, low cost, convenient operation, and stability is good, and is small, light in weight, portable, the equipment and the maintenance of also being convenient for have extensive popularization prospect.
Drawings
Fig. 1 is a schematic view of the overall structure of the device for detecting grouting compactness of a duct provided by the present invention;
fig. 2 is a cross-sectional view of a pressure detection module in the pore grouting compactness detection device provided by the present invention;
fig. 3 is a schematic view of the overall structure of a pressure detection module in the pore grouting compactness detection device provided by the present invention;
fig. 4 is a schematic structural diagram of a pressure sensor in the pore grouting compactness detecting device provided by the present invention;
FIG. 5 is a schematic view of a channel grouting test using only one channel grouting compactness test device;
FIG. 6 is a schematic view of a grouting compactness testing device for six channels;
fig. 7 is a side view of fig. 6.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the embodiments of the present application will be described clearly and completely with reference to fig. 1 to 7 of the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments obtained by a person of ordinary skill in the art without any inventive work based on the embodiments in the present application are within the scope of protection of the present application. Thus, the following detailed description of the embodiments of the present application, as presented in the figures, is not intended to limit the scope of the claimed application, but is merely representative of selected embodiments of the application.
As shown in fig. 1, the device for detecting grouting compactness of a pore passage comprises a pressure detection module 1 and a connecting rope 2. The connecting rope 2 is made of a material which is easily bendable and not easily corroded, preferably a steel wire rope. The connecting rope 2 is fixedly provided with a plurality of pressure detection modules 1, and each pressure detection module 1 at least comprises a pressure sensor 13 for detecting the pressure in the pore channel. Furthermore, the connecting rope 2 is fixedly provided with wires, and the wires respectively connect all the pressure detection modules 1 on the connecting rope.
More specifically, the pressure detecting modules 1 are arranged in line at equal intervals on the connecting rope 2 so as to be able to detect each area uniformly. At least two wires are fixedly arranged on the connecting rope 2 and used for providing power supply and communication for the pressure detection module 1.
As shown in fig. 2 to 4, the pressure detection module 1 further includes an elastic bag made of an elastic material, preferably a silicone material. The material is corrosion resistant and has good elasticity.
As shown in fig. 2 and 3, the elastic bag comprises an inner cylinder 10 and an outer cylinder 11, wherein the outer diameter of the inner cylinder 10 is smaller than the inner diameter of the outer cylinder 11; the inner diameter of the inner cylinder 10 can pass through the connecting rope 2. Two ends of the inner cylinder 10 are respectively connected with two ends of the outer cylinder 11 in a sealing way, the outer wall of the inner cylinder 10 and the inner wall of the outer cylinder 11 form a closed cavity 12, and liquid or gas is filled in the cavity 12. In this embodiment, the cavity 12 is preferably filled with water. The pressure sensor 13 is fixed to the outer cylinder 11, and a pressure detection portion of the pressure sensor 13 extends into the cavity 12 for detecting the pressure in the cavity 12. Of course, the pressure sensor 13 may be fixed elsewhere or suspended within the cavity 12, as long as it can sense and detect the pressure within the cavity 12.
As shown in fig. 4, the pressure sensor 13 includes a sensing chamber 130, an elastic sheet 131, a deformation sensing element 132, a supporting rod 133, and a circuit board 134. The sensing chamber 130 has a hollow cylindrical structure, and the top thereof is open. The sensing chamber 130 is hermetically provided with an elastic sheet 131, and the bottom surface of the elastic sheet 131 is fixedly provided with a deformation sensing element 132. The space between the elastic sheet 131 and the sensing chamber 130 can be filled with gas under a certain pressure or vacuumized, so that when the external pressure changes, the elastic sheet 131 is deformed, and the deformation is transmitted to the deformation sensing element 132. The deformation sensing element 132 may be a resistance strain gauge, which has the advantages of mature circuit, low cost and easy production.
The bottom of the induction bin 130 is fixedly provided with a support rod 133, and the bottom of the support rod 133 is fixedly connected with a circuit board 134. To facilitate the connection, the support rod 133 may be formed in a hollow structure through which a wire is inserted. The circuit board 134 has a control unit 135 soldered thereto. The support rod 133 passes through the outer cylinder 11 and extends the induction cartridge 130 into the cavity 12.
The control unit 135 comprises a microcontroller and a communication module, the deformation sensing element 132 is connected with the control unit 135, and signals generated by the deformation sensing element 132 are acquired and converted into digital signals by the microcontroller through AD (analog-to-digital) and then are converted into pressure values.
In addition, in order to enable the device to work normally, a communication master station 3 should be further provided, and the communication master station 3 is provided with a power line carrier communication master station module and a controller, and is used for providing power and signal acquisition for the pressure detection module 1. Similarly, the communication module in the control unit 135 is also a plc communication module, and is matched with and corresponds to the plc master station module.
As shown in fig. 5, this is a schematic diagram of performing the grouting detection of the duct by using only one duct grouting compactness detection device, and the detection method is specifically described as follows:
firstly, a pore grouting compactness detection device is arranged along a pore needing grouting in a penetrating mode. In the figure, the mark 5 is a pore channel which can be a PVC pipeline or a corrugated pipe, the mark 4 is a steel strand, 1 is a pressure detection module, and 2 is a connecting rope. It should be noted that if only one device is used for detection, the device for detecting the grouting compactness of the duct should be arranged along the length direction of the duct and at the middle-upper part of the duct. The purpose of doing so is that, because the grout receives the action of gravity, the lower-middle part of pore is more full usually, and there is the phenomenon of cavity or insufficient filling seldom, and the insufficient filling position is most concentrated in the upper-middle part even top in pore, therefore it is extremely important to set up pore grout compactness detection device in the middle and upper position in pore.
And secondly, connecting a power supply and communication terminal interface of the pore grouting compactness detection device with the communication master station 3, and reading and storing data of all the pressure detection modules 1. The method is a standard detection which is carried out before grouting after the pore grouting compactness detection device is installed, is equivalent to self-detection and is used for judging whether all pressure detection modules 1 in the device are good or not and what the basic pressure value is when the pressure detection modules are not pressed. This base pressure value is used to prepare for subsequent data comparisons.
And thirdly, grouting cement slurry into the pore channel, wherein the step is the same as the conventional process and has no new improvement.
And fourthly, reading and storing the data of all the pressure detection modules 1 again after grouting is finished. The data read in this step is to confirm whether the pressure sensor in each pressure detection module 1 receives pressure again, and if there is pressure, the pressure value is different from the basic pressure value read for the first time, which further explains that the device can be used normally. If the sensor is abnormal, emergency treatment can be carried out, such as re-threading or replacement.
And fifthly, reading and storing the data of all the pressure detection modules 1 again when the cement slurry in the pore channel is initially set. The most critical step is that after the cement paste is initially set, the volume of the cement paste changes to a certain extent, and since the elastic bag in each pressure detection module 1 is made of a silica gel material and has elasticity, and the cavity 12 of the pressure detection module is filled with liquid, the liquid is in contact with the pressure detection part of the pressure sensor 13, no matter which part of the elastic bag is subjected to pressure or pulling force, the cavity 12 deforms and the pressure in the cavity 12 changes, so that the pressure or the pulling force is transmitted to the pressure sensor 13 through the liquid. This is where this pressure detection module 1 is distinguished from other sensors, which can achieve 360 degree pressure detection.
And sixthly, comparing the data read for three times, judging whether a position with insufficient grouting exists in the pore channel, and if so, marking the position. Because the data of each pressure detection module 1 are ID and pressure value, on the same pore grouting compactness detection device, the identification information of each pressure detection module 1 can not be repeated. For example, the pressure value of the pressure detection module 1 with the identity code of 1A is placed in the first column of the table, the first row in the first column stores the basic pressure value, the second row in the first column is the pressure value read for the second time during grouting, the third row in the first column is the pressure value after the last initial setting, and the basic change of the pressure can be known by comparing the three pressure values. Of course, the reading can be performed for multiple times, and is not limited to three times, and three times are only for convenience of description. If the pressure value of the sensor is not large but small or does not change greatly, the phenomenon that the cement at the sensor has a cavity or is insufficiently filled is indicated, the specific position of each sensor can be quickly judged through the self identification code of each sensor, and the subsequent operation is guided.
And step seven, finishing detection.
In order to solve the problem, as shown in fig. 6 and 7, 6 parallel hole grouting compactness detection devices can be arranged in a hole to be grouted, and the parallel hole grouting compactness detection devices are uniformly arranged along the radial direction of the hole from bottom to top. The structure can conveniently know the size of the longitudinal cavity in the pore channel, can accurately position the position of the pore channel, and provides data basis for providing compactness evaluation indexes.
The utility model discloses a fixed a plurality of pressure measurement module 1 on a connecting rope 2 to couple together these pressure measurement module 1 with bus connection, 360 degrees pressure measurement can both be realized to each pressure measurement module 1. When in use, the porous pipe is distributed along the length direction of the pore canal and is arranged upwards. The utility model discloses a can accurately detect each insufficient position of slip casting and can accurately mark, its reasonable in design, the structure is ingenious, low cost, convenient operation, and stability is good, and is small, light in weight, portable, the equipment and the maintenance of also being convenient for have extensive popularization prospect.
Claims (7)
1. The device for detecting the grouting compactness of the pore passage is characterized by comprising a pressure detection module (1) and a connecting rope (2);
the connecting rope (2) is fixedly provided with a plurality of pressure detection modules (1);
the connecting rope (2) is fixedly provided with wires which are respectively and electrically connected with the pressure detection module (1);
the pressure detection module (1) comprises a pressure sensor (13) for detecting the pressure in the pore channel.
2. The apparatus for testing the grouting compactness of the duct according to claim 1, wherein:
the pressure detection modules (1) are arranged in a line at equal intervals on the connecting rope (2);
at least two wires are fixedly arranged on the connecting rope (2) and used for providing power supply and communication for the pressure detection module (1).
3. The apparatus for testing the grouting compactness of the duct according to claim 2, wherein:
the pressure detection module (1) further comprises an elastic bag made of elastic materials;
the elastic bag comprises an inner cylinder (10) and an outer cylinder (11), and the outer diameter of the inner cylinder (10) is smaller than the inner diameter of the outer cylinder (11); the inner diameter of the inner cylinder (10) can penetrate through the connecting rope (2);
two ends of the inner cylinder (10) are respectively connected with two ends of the outer cylinder (11) in a sealing way, the outer wall of the inner cylinder (10) and the inner wall of the outer cylinder (11) form a closed cavity (12), and liquid or gas is injected into the cavity (12);
the pressure sensor (13) is fixed on the outer cylinder (11), and a pressure detection part of the pressure sensor (13) extends into the cavity (12) and is used for detecting the pressure in the cavity (12).
4. The apparatus according to claim 3, wherein the apparatus comprises:
the pressure sensor (13) comprises a sensing bin (130), an elastic sheet (131), a deformation sensing element (132), a supporting rod (133) and a circuit board (134);
the induction bin (130) is of a hollow cylindrical structure, and the top of the induction bin is open; the elastic sheet (131) is hermetically arranged on the sensing bin (130), and the deformation sensing element (132) is fixedly arranged on the bottom surface of the elastic sheet (131);
the bottom of the induction bin (130) is fixedly provided with the supporting rod (133), and the bottom of the supporting rod (133) is fixedly connected with the circuit board (134);
a control unit (135) is welded on the circuit board (134);
the supporting rod (133) penetrates through the outer cylinder (11) and extends the induction bin (130) into the cavity (12).
5. The apparatus according to claim 4, wherein the apparatus comprises:
the control unit (135) comprises a microcontroller and a communication module;
the deformation sensing element (132) is electrically connected with the control unit (135);
the deformation sensing element (132) is a resistive strain gauge.
6. The apparatus according to claim 5, wherein the apparatus comprises:
the pressure detection device is characterized by further comprising a communication master station (3), wherein the communication master station (3) is provided with a power line carrier communication master station module and is used for providing power for the pressure detection module (1) and collecting signals;
the communication module is a power line carrier communication module.
7. The apparatus according to claim 3, wherein the apparatus comprises:
the elastic material is a silica gel material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020322643.9U CN211927603U (en) | 2020-03-16 | 2020-03-16 | Pore grouting compactness detection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020322643.9U CN211927603U (en) | 2020-03-16 | 2020-03-16 | Pore grouting compactness detection device |
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| Publication Number | Publication Date |
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| CN211927603U true CN211927603U (en) | 2020-11-13 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202020322643.9U Active CN211927603U (en) | 2020-03-16 | 2020-03-16 | Pore grouting compactness detection device |
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Address after: No.6, Gaoxin 2nd Road, XiXiangTang District, Nanning City, Guangxi Zhuang Autonomous Region Patentee after: Guangxi Jiaoke Group Co.,Ltd. Address before: 530007 No. 6 hi-tech two road, XiXiangTang District, Nanning, the Guangxi Zhuang Autonomous Region Patentee before: GUANGXI TRANSPORTATION RESEARCH & CONSULTING Co.,Ltd. |