JP2007046940A - Method for detecting filling, mortar pie manufacturing apparatus and system for detecting filling - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To obtain a method for detecting filling which enables the manufacture of a mortar pie becoming distorted in shape and not forming a notch part and capable of certainly detecting the filling state of a filler in a gap between a column base plate and foundation concrete; and also to provide a mortar pie manufacturing apparatus and a filling detecting system. <P>SOLUTION: This system is provided with the mortar pie manufacturing apparatus 2. The mortar pie manufacturing apparatus 2 having a ring-shaped frame body 21 keeps a piezoelectric speaker 22 arranged on the outer peripheral surface of the ring-shaped frame body 21 and connected to a filling sensor 3. The filling sensor 3 is constituted so as to detect the filling state of the filler from vibration frequency characteristics obtained by applying an electric signal changed in frequency with the elapse of time to the piezoelectric speaker 22. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention detects the filling state of the filling material between the column base plate and the foundation concrete when the steel column connected to the steel column or CFT (Concrete Filled steel Tube) column base plate is installed in the foundation concrete. Mortar bun making apparatus and mortar for producing mortar buns to be constructed on the surface of the foundation concrete and immediately below the column base plate when the steel column connected with the column base plate is built in the foundation concrete The present invention relates to a filling detection system equipped with a bun manufacturing apparatus.

  Conventionally, when a steel column is built in foundation concrete in a building foundation structure, an anchor bolt fixed to the foundation concrete is fitted into the anchor bolt hole of the column base plate connected to the steel column, and a nut is inserted into the anchor bolt protruding from the anchor bolt hole. There is a method of building by tightening. In this construction method, when a steel column is built into the foundation concrete, a non-shrink grout material (kneaded mortar) required to support the steel column called “Mortar Manju” at the center of the upper surface of the foundation concrete has a predetermined height. Install the material applied to After the mortar bun is installed, the column base plate is erected. At that time, cement milk or mortar called back-filled mortar is used to fill the gap between the foundation concrete around the mortar bun and the column base plate. A filler containing is injected.

  For detecting the filling condition of the filler injected between the foundation concrete and the column base plate, the anchor bolt hole of the column base plate is formed large, and the filler injection hole communicating with the anchor bolt hole and the filling There is a method of providing a material detection hole and injecting a filler from a filler injection hole, and filling the filler into a full state when the filler overflows from the filling detection hole by this injection (for example, Patent Documents) 1).

JP-A-7-10239

  However, in the conventional method of detecting the filler performed to fill the gap between the column base plate and the foundation concrete as described above, only the filling state of the periphery of the anchor bolt can be confirmed, and the filler injection method (for example, There is a problem that unfilled portions remain around the mortar depending on the size and shape of the mortar.

  In particular, the shape of mortar buns is usually round and square, but in the case of mortar buns with a square shape, even if the filler is continuously injected, the periphery of the mortar buns, especially from the filling position. As can be seen, an unfilled portion due to air accumulation tends to occur on the downstream side of the mortar bun. This is because, as the flow distance of the filler increases, the flow of the filler changes at the corners of the mortar bun, so that an unfilled portion due to air accumulation tends to occur at a point where the flow has slowed. Therefore, it is preferable to make the mortar bun into a round shape rather than a square shape in order to suppress the occurrence of unfilled portions. However, mortar buns usually have non-shrinkable mortar stacked on the center part of the column base plate and manually molded to a predetermined height. There is a possibility that an unfilled portion may occur due to a factor that occurs in a mold-shaped mortar bun.

  Also, in the conventional method, the filling status is checked by visually judging the outflow of the filler from the filler detection hole. However, footnotes, reinforcing bars and steel frames are often overcrowded at the construction site. In such a case, there is also a problem that it is difficult to visually check the filler detection hole and the confirmation of the filling state cannot be easily performed.

  The present invention has been made in view of such circumstances, and can be used to produce a mortar bun that does not have an irregular shape or a notch, and the pedestal base plate and the foundation concrete around the mortar bun. It is an object of the present invention to provide a filling detection method, a mortar bun production apparatus, and a filling detection system that can reliably detect the filling state of a filler in a gap between them.

The above object is achieved by the following method and configuration.
(1) In the filling detection method for detecting the filling state of the filler injected into the gap between the column base plate and the foundation concrete when the steel column connected with the column base plate is built into the foundation concrete, After placing a substantially ring-shaped frame body directly below the column base plate on the foundation concrete surface and driving in a non-shrink mortar for producing mortar buns in the frame body, the steel column is moved to the foundation concrete. At the time of injecting the filler between the column base plate and the foundation concrete around the mortar bun when built in, the output signal of the sensor element arranged in advance in the substantially ring-shaped frame, Based on this output signal, it is injected into the gap between the column base plate and the foundation concrete. Detects the filling status of the filler.

(2) In the filling detection method according to (1), the sensor element that converts electrical energy into mechanical energy is used, and an electrical signal whose frequency changes with time is applied to the sensor element. The vibration frequency characteristic of the sensor element is detected, and the filling state of the filler is detected based on the detected vibration frequency characteristic of the sensor element.

(3) A mortar bun making apparatus using a non-shrink mortar on the surface of the foundation concrete and immediately below the pedestal base plate when the steel column connected with the pedestal base plate is built into the basic concrete. Is provided with a substantially ring-shaped frame.

(4) The mortar bun manufacturing apparatus according to (3), further including a height adjusting unit that enables adjustment in a height direction of the substantially ring-shaped frame.

(5) In the mortar bun manufacturing apparatus according to (3) or (4), a plurality of sensors that are spaced apart from each other on the outer peripheral surface of the substantially ring-shaped frame and each convert electrical energy into mechanical energy The device is provided.

(6) In the filling detection system for detecting the filling state of the filler injected into the gap between the column base plate and the foundation concrete when the steel column connected to the column base plate is built in the foundation concrete, A mortar bun making apparatus having a substantially ring-shaped frame for making a mortar bun using non-shrink mortar on the base concrete surface and directly under the column base plate, and the mortar bun making apparatus arranged in the substantially ring-shaped frame A filling detection device for detecting a filling state of the filler injected between the column base plate around the mortar steam and the foundation concrete based on an output signal of a sensor element.

(7) In the filling detection system according to the above (6), the sensor element converts electrical energy into mechanical energy, and the filling detection device has a frequency of each of the plurality of sensor elements over time. A changing electrical signal is applied to detect the vibration frequency characteristic of each sensor element, and the filling state of the filler is detected based on the detected vibration frequency characteristic of each sensor element.

  In the filling detection method described in (1) above, the use of a substantially ring-shaped frame for the production of mortar buns on the foundation concrete may cause the shape to become irregular or have a notch. No mortar buns can be made. After the mortar bun is manufactured, even if the filler is injected intermittently during the process of injecting the filler into the gap between the column base plate around the mortar bun and the foundation concrete, The sensor element is arranged on the outer peripheral surface of the frame body, the output signal of the sensor element is taken in, and the filling state of the filling material is detected based on this output signal value. This can be detected immediately. As a result, the injection method can be reviewed, and the determination of reworking can be ensured. Moreover, the filling condition of the filler can be confirmed nondestructively.

  In the filling detection method described in (2) above, a sensor element that converts electrical energy into mechanical energy is used, and an electrical signal whose frequency changes with time is applied to the sensor element to obtain vibration frequency characteristics. By determining, the filling state of the filler can be confirmed nondestructively.

  In the mortar bun making apparatus described in the above (3), since the substantially ring-shaped frame body is provided, the mortar bun can be easily produced without distorting the shape or forming a notch. . Thereby, the generation | occurrence | production ratio of unfilling can be suppressed low and the reliable connection of a steel column and foundation concrete is attained.

  In the mortar bun making apparatus described in the above (4), since the substantially ring-shaped frame body includes the height adjusting means, the height of the mortar bun and the leveling at the time of mortar bun making can be easily performed.

  In the mortar bun manufacturing apparatus described in the above (5), since the plurality of sensor elements are provided in the substantially ring-shaped frame body, the filling state of the filler can be confirmed nondestructively. In particular, by providing the sensor element over the entire outer peripheral surface of the ring-shaped frame, it is possible to detect the filling state of the filler without leaving any excess.

  The filling detection system described in (6) above has a substantially ring-shaped frame for producing mortar buns, so that mortar buns that do not become distorted or have notches are produced. can do. In addition, in the process of injecting the filler into the gap between the column base plate around the mortar bun and the foundation concrete after the mortar bun is manufactured, even if the filler is injected intermittently, the mortar bun making apparatus Since the filling state of the filling material is detected by the sensor element and the filling detection device, when there is no filling, it can be immediately detected. As a result, the injection method can be reviewed and the judgment of re-installation can be ensured. Moreover, the filling condition of the filler can be confirmed nondestructively.

  In the filling detection system according to (7) above, a sensor element that converts electrical energy into mechanical energy is provided, and an electrical signal whose frequency changes with time is applied to the sensor element to determine the vibration frequency characteristics. Therefore, the filling condition of the filler can be confirmed nondestructively. In particular, by providing a plurality of sensor elements over the entire outer peripheral surface of the substantially ring-shaped frame body, it is possible to detect the filling state of the filler without leaving.

  DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, preferred embodiments for carrying out the invention will be described in detail with reference to the drawings.

  FIG. 1 is a block diagram showing a schematic configuration of a filling detection system according to an embodiment of the present invention. In this figure, the filling detection system 1 according to the present embodiment includes a mortar bun production apparatus 2 and a filling detection apparatus 3.

  As shown in FIG. 7, the mortar bun production apparatus 2 is for producing mortar buns 8 provided on the surface of the foundation concrete 7 when the steel column 6 connected to the column base plate 5 is built into the foundation concrete 7. In addition, after the mortar buns 8 are made, the filling material (cement milk, mortar, etc.) 9 is filled into the gap formed between the column base plate 5 and the foundation concrete 7 around the mortar buns. Used to detect the situation. The filler 9 is injected from between the filler flow-stopping mold 10 temporarily installed around the column base 5 and the column base 5.

  Returning to FIG. 1, the mortar bun production apparatus 2 includes a ring-shaped frame 21 formed in a substantially circular shape, and a plurality (six in this embodiment) of piezoelectric speakers (sensors) each converting electrical energy into mechanical energy. Element) 22. A piezoelectric ceramic diaphragm may be used instead of the piezoelectric speaker. Further, the number of piezoelectric speakers or piezoelectric ceramic diaphragms as sensor elements is not limited to six, and may be less or more.

As shown in FIG. 2, the ring-shaped frame 21 of the mortar bun manufacturing apparatus 2 is made of metal (or resin), and sensor mounting brackets formed in an L-shape on the upper edge of the outer periphery thereof. 21a are attached at intervals of 60 degrees.
As shown in FIG. 3, the sensor mounting bracket 21 a is attached to the main body of the ring-shaped frame 21 by spot welding 25. In addition to attaching by spot welding, as shown in FIG. 4, a method of attaching with a screw (or rivet) 26, or as shown in FIG. There is a method of attaching by forming a plurality of holes 27 and inserting one end portion of the sensor mounting bracket 21 a into each hole 27.

  Moreover, as shown in FIG. 6, the height adjustment metal fitting 21b for leveling and leveling the mortar bun to produce is attached to the outer peripheral surface of the ring-shaped frame 21 of the mortar bun production apparatus 2. The height adjusting bracket 21b is composed of a main body 30 formed in an L shape and having a screw hole cut in one piece thereof, and a height adjusting screw 31 screwed into the screw hole of the main body 30. Three are provided at intervals of 120 degrees along the circumferential direction of the frame 21. In addition, the attachment of the height adjustment fitting 21b to the main body includes spot welding, screws (rivets), insertion, and the like, similar to the attachment of the sensor attachment fitting 21a. Note that the number of height adjusting brackets 21b attached to the ring-shaped frame 21 is not limited to three, and may be more or less.

  By turning the height adjustment screw 31 of the height adjustment fitting 21b in the direction of entering the main body 30, the tip of the height adjustment screw 31 hits the foundation concrete 7, and then further turning around, so that the ring-shaped frame body 21 is lifted and the height L of the mortar buns to be produced is increased. As described above, the height adjusting bracket 21b can set the height of the mortar buns produced in accordance with the surface of the foundation concrete 7 to a desired value, and can also easily level the mortar buns.

Each of the six piezoelectric speakers 22 uses a piezoelectric element, and converts an electrical signal into a mechanical signal and outputs it. Each piezoelectric speaker 22 is attached to the lower surface of the sensor mounting bracket 21a protruding from the ring-shaped frame 21 as shown in FIG. 3, FIG. 4, or FIG.
By attaching the piezoelectric speaker 22 to the lower surface of the sensor mounting bracket 21a, the filling state of the filling material 9 can be detected when the filling material 9 is filled up to the height of the mortar manju 8, and the column base plate 5 around the mortar manju. It is possible to reliably fill the filler 9 into the gap between the base concrete 7 and the base concrete 7. If a plurality of piezoelectric speakers 22 are attached along the height direction of the ring-shaped frame body 21, it is possible to sequentially grasp the progress of the filling state. That is, since the filler is sequentially detected from the lower piezoelectric speaker 22 in accordance with the progress of the injection of the filler, the progress of the filling state can be known.

Next, the usage method of the mortar bun production apparatus 2 is demonstrated with reference to FIG.
First, after placing the mortar bun production apparatus 2 on the upper surface of the foundation concrete 7 and at a position corresponding to the lower center of the column base plate 5, the height adjusting screw 31 of the height adjusting bracket 21b is adjusted to adjust the height. Adjustment is performed and the upper end of the ring-shaped frame 21 is leveled. After the height adjustment and leveling, a non-shrink mortar is driven into the ring-shaped frame body 21, and then the upper end of the ring-shaped frame body 21 is leveled with a trowel so that there is no gap with the column base plate. Level out as follows.

The mortar bun manufacturing apparatus 2 is capable of manufacturing the mortar bun 8 that comes into close contact with the column base plate 5 very easily because the ring-shaped frame 21 is close to a perfect circle from the beginning and includes the height adjusting bracket 21b. Can do. In addition, since it is possible to produce a mortar bun almost close to a perfect circle, in the process of injecting the filler in the subsequent process, the flow of the filler is less likely to change, and the occurrence of unfilled portions due to air accumulation generated in the prior art is prevented. It can be kept low.
Since the unfilled portion of the filler that occurs around the mortar bun under the column base plate cannot be visually observed, it is effective to detect the unfilled portion by any method when filling the filler in the sense of reducing the unfilled portion. is there. And if an unfilled part can be detected, the injection | pouring method can be reviewed and the judgment of reworking can be performed reliably.
In the filling detection system 1 of the present embodiment, the filling state of the filling material is detected by the six piezoelectric speakers 22 of the mortar bun making apparatus 2 and the filling detection device 3, so that the user can easily determine the filling state from the result. can do.

Next, the filling detection device 3 will be described.
FIG. 8 is a block diagram illustrating a schematic configuration of the filling detection device 3. In this figure, the filling detection device 3 includes a signal generation / application unit 50 and frequency characteristic detection units 60-1, 60-2,..., 60-6 that are the same as the number of piezoelectric speakers 22 of the mortar bun production device 2. The determination unit 70 and the display unit 80 are provided.
The signal generation / application unit 50 includes a synchronization signal generator 51, a variable frequency oscillator 52, and an amplifier 53. The synchronization signal generator 51 generates a synchronization signal for repeatedly operating the variable frequency oscillator 52.
The variable frequency oscillator 52 generates a sinusoidal electric signal whose frequency continuously changes in a predetermined frequency range (for example, 1 kHz to 20 kHz). In this case, every time a synchronization signal is output from the synchronization signal generator 51, a sine wave signal is repeatedly generated from an initial frequency (for example, 1 kHz).
The amplifier 53 amplifies the sine wave signal from the variable frequency oscillator 52 to a level at which the piezoelectric speaker 22 of the mortar bun making apparatus 2 can be driven, and outputs it as an excitation signal Vr.

Each of the frequency characteristic detectors 60-1, 60-2,..., 60-6 has a one-to-one relationship with each piezoelectric speaker 22 of the mortar bun making apparatus 2, and each includes a resistor 61 and a differential amplifier. 62, a four-quadrant multiplier 63, and a low-pass filter 64.
The resistor 61 is inserted in series between the amplifier 53 of the signal generating / applying unit 50 and the mortar bun making apparatus 2 and corresponds to the current flowing through one piezoelectric speaker 22 of the mortar bun making apparatus 2 at both ends thereof. A voltage is generated.
Since the amplitude and phase of the current flowing through the piezoelectric speaker 22 change according to the change in frequency, the voltage generated across the resistor 61 reflects the frequency characteristics of the piezoelectric speaker 22.

The differential amplifier 62 amplifies the voltage generated at both ends of the resistor 61 and outputs the voltage Vi.
The four-quadrant multiplier 63 multiplies the excitation signal Vr output from the amplifier 53 of the signal generation / application unit 50 by the voltage Vi output from the differential amplifier 62 to remove the influence of noise on these voltages. To do.
The low-pass filter 64 outputs a signal (output voltage Vo) obtained by removing cos (2ωt + α + β) described below from the output signal of the 4-quadrant multiplier 63. In this embodiment, as shown in FIG. 1, one signal generation / application unit 50 is provided for the six frequency characteristic detection units 60-1, 60-2,..., 60-6. , 60-6 may be provided for each of the six frequency characteristic detectors 60-1, 60-2,..., 60-6.

  The determination unit 70 includes a microcomputer, a RAM, a ROM, and an A / D converter (not shown). Based on the characteristic vibration frequency characteristics when the filler is not brought into contact with each piezoelectric speaker 22 of the mortar bun manufacturing apparatus 2. Then, the contact / non-contact of the filler with respect to each piezoelectric speaker 22 is determined from the signal output from the low-pass filter 64, and the result (good or bad) is displayed on the display unit 80. In addition, once the unique vibration frequency characteristics of each piezoelectric speaker 22 are set, it is not necessary to reset them except during maintenance. The unique vibration frequency characteristics of each piezoelectric speaker 22 are stored in the RAM. A program for controlling the microcomputer is stored in the ROM.

Next, the operation of the filling detection device 3 having the above configuration will be described.
After the sine wave signal generated by the variable frequency oscillator 52 is amplified by the amplifier 53, it is applied to each of the six piezoelectric speakers 22 of the mortar bun making apparatus 2 as the excitation voltage Vr. Thereafter, since the operations corresponding to the six piezoelectric speakers 22 are all the same, the description will be continued with a focus on one piezoelectric speaker 22.
Mechanical vibration is generated by applying the excitation voltage Vr to the piezoelectric speaker 22, and a voltage corresponding to the current flowing through the piezoelectric speaker 22 is generated in the resistor 61. The voltage generated in the resistor 61 is amplified by the differential amplifier 62 to obtain the voltage Vi, and the voltage Vi is input to the 4-quadrant multiplier 63.

  On the other hand, the excitation voltage Vr from the amplifier 53 of the signal generating / applying unit 50 is also input to the 4-quadrant multiplier 63, and the excitation voltage Vr and the voltage Vi from the differential amplifier 62 are multiplied. The noise for the voltage is removed. The output signal from the four-quadrant multiplier 63 from which noise has been removed is input to the low-pass filter 64, and the cos (2ωt + α + β) component is removed to obtain the output voltage Vo. The output voltage Vo is a signal reflecting the frequency characteristics (amplitude and phase) of the piezoelectric speaker 22 with respect to the frequency change of the excitation voltage Vr. At this time, if the filler 9 is not in contact with the surface of the piezoelectric speaker 22 (the air is in contact), the frequency near the natural frequency of the piezoelectric speaker 22 has a peak as shown in FIG. A voltage appears. On the other hand, when the filler 9 is filled around the piezoelectric speaker 22, as shown in FIG. 10, the vibration characteristics of the piezoelectric speaker 22 change, and the position and magnitude of the peak voltage change. That is, there is almost no peak voltage. The determination unit 70 determines the filling state of the filler from the change in the peak voltage, and displays the result on the display unit 80.

  In particular, the determination unit 70 switches the frequency characteristic detection units 60-1 to 60-6 in a short time, takes in the output voltages Vo of the frequency characteristic detection units 60-1 to 60-6, and performs determination on each. . For example, if the filler is detected from the direction indicated by the arrow 90 in FIG. 1, the detection is performed from the piezoelectric speaker 22 closest to the filler, and thereafter, the filler is detected in the order closest to the filler to be filled. Detection is performed. Then, filling detection is performed by the farthest piezoelectric speaker 22. When detection is performed in all the piezoelectric speakers 22, filling is completed. If even one detection is not performed, it is determined that an unfilled portion due to an air pocket has occurred, and the injection method is reviewed, It will be judged again.

  Here, FIG. 11 is an example of a filling detection result when the filler is continuously injected. FIG. 12 shows an example of the filling detection result when the filler is injected intermittently. 11 and 12, the vertical axis indicates the elapsed time, and the horizontal axis indicates the sensor number. For example, as shown in FIG. 1, the sensor numbers are assigned as (1), (2), (3), (4), (5), and (6) to the six piezoelectric speakers 22 as shown in FIG. ing. When the filling material is continuously injected, as shown in FIG. 11, the filling of the filling material is detected by all the piezoelectric speakers 22 at 6 minutes 06 seconds after the start of the injection (1) to (6). On the other hand, when the filler is injected intermittently, as shown in FIG. 12, even after 19 minutes and 26 seconds from the start of injection, only the piezoelectric speaker 22 of (1) just before the injection port is used. It can be seen that filling is not detected and filling is not detected in the piezoelectric speakers 22 of (2) to (6). Thus, the mortar bun production apparatus 2 can detect the filling state of the filler 9 with respect to the entire periphery of the ring-shaped frame 21.

Next, the operation principle will be described using mathematical expressions.
Here, it is assumed that Vr = Asin (ωt + α) and Vi = Bsin (ωt + β). However, A and B are amplitudes, ωt is a frequency, and α and β are phase shifts.
Vr × Vi = Asin (ωt + α) × Bsin (ωt + β)
= AB [cos (β-α) -cos (2ωt + α + β)] / 2 (1)

  The part of cos (β−α) in the equation (1) is a direct current component that changes in accordance with the phase difference, and includes the amplitude component of the voltage Vi. The portion of cos (2ωt + α + β) is a signal having a frequency twice that of the original excitation voltage Vr and voltage Vi. Since the necessary frequency characteristic information is the amplitude (magnitude) of the voltage Vi, only cos (β−α) in the equation (1) is sufficient. Therefore, the component of cos (2ωt + α + β) may be removed by passing through the low-pass filter 64. In this way, frequency characteristics appear in the form of voltage in the output voltage Vo.

  As shown in FIG. 9 and FIG. 10, when the filler 9 is filled in the gap between the column base plate 5 and the foundation concrete 7 around the mortar buns 8, the peak frequency and level change. The situation can be detected.

  Thus, according to the filling detection system 1 of the present embodiment, since the mortar bun production apparatus 2 having the ring-shaped frame body 21 is provided, the shape does not become distorted or a notch is not formed. Mortar buns 8 can be produced. Also, since the mortar bun production apparatus 2 is provided with a height adjustment 21b that enables height adjustment, the height of the mortar bun 8 can be set to a desired value, and the mortar bun 8 can be leveled. It can be done easily. Moreover, even if the injection | pouring is performed intermittently in the process which inject | pours the filler 9 into the clearance gap between the column base plate 5 and the foundation concrete 7 around the mortar bun 8 after mortar bun manufacture, mortar bun manufacture Since the filling state of the filler 9 is detected nondestructively by the six piezoelectric speakers 22 and the filling detection device 3 of the apparatus 2, the injection of the filler 9 becomes intermittent when an unfilled portion is detected. As a result, it is possible to review the injection method and to make a judgment on re-installation. Thereby, the filler 9 can be reliably filled into the gap between the column base plate 5 and the foundation concrete 7.

  In the above embodiment, a sine wave having a single frequency range is used. However, a frequency range switch (not shown) for switching the frequency range is provided to selectively select a sine wave having a plurality of frequency ranges. You may be able to do it. In this case, the variable frequency oscillator 52 has a function of repeatedly generating a sine wave signal in the frequency band in the range switched by the frequency range switch. In this way, by selecting sine waves in multiple frequency ranges, the optimum frequency range for measurement can be selected according to the physical characteristics such as the structure and material of the column base plate and foundation concrete. Therefore, measurement with higher accuracy is possible.

  The present invention makes it possible to produce a mortar bun that does not become distorted or have a notch, and fills the gap between the column base plate and the foundation concrete around the mortar bun. It has the effect that it can be performed reliably, and the production of mortar buns for the construction of steel columns connected to steel or CFT column base plates into the basic concrete, and between the column base plate and the basic concrete This is useful as a filling detection device that detects the filling state of the filling material into the gap in a non-destructive manner.

It is a block diagram which shows schematic structure of the filling detection system which concerns on one embodiment of this invention. It is a perspective view which shows the general appearance of the ring-shaped frame of the mortar bun manufacturing apparatus of FIG. It is a figure which shows the example of attachment of the sensor attachment metal fitting in the ring-shaped frame of FIG. It is a figure which shows the other example of attachment of the sensor attachment metal fitting in the ring-shaped frame of FIG. It is a figure which shows the other example of attachment of the sensor attachment metal fitting in the ring-shaped frame of FIG. It is a figure which shows the height adjustment metal fitting in the ring-shaped frame of FIG. It is a figure which shows the state after erection in the foundation concrete of the steel column which connected the column base plate. It is a block diagram which shows schematic structure of the filler detection apparatus of FIG. It is an example of the measurement result in the filler detection apparatus of FIG. 1, and is an output voltage waveform diagram when the filler is not in contact with the piezoelectric speaker. It is an example of the measurement result in the filler detection apparatus of FIG. 1, and is an output voltage waveform diagram when the filler is in contact with the piezoelectric speaker. It is a figure which shows the filling detection result when filling material is continuously inject | poured. It is a figure which shows the filling detection result when a filling material is inject | poured intermittently.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Filling detection system 2 Mortar bun production apparatus 3 Filling detection apparatus 5 Column base plate 6 Steel column 7 Foundation concrete 8 Mortar bun 9 Filling material 10 Filling material flow-stop mold 21 Ring-shaped frame 21a Sensor mounting bracket 21b Height adjustment bracket DESCRIPTION OF SYMBOLS 22 Piezoelectric speaker 31 Height adjustment screw 50 Signal generation / application part 51 Synchronization signal generator 52 Variable frequency oscillator 53 Amplifier 60-1 to 60-6 Frequency characteristic detection part 61 Resistor 62 Differential amplifier 63 Four quadrant multiplier 64 Low pass Filter 70 Determination unit 80 Display unit

Claims (7)

In the building detection method for detecting the filling state of the filler to be injected into the gap between the column base plate and the foundation concrete when the steel column connected to the column base plate is built into the foundation concrete,
After placing a substantially ring-shaped frame body directly below the column base plate on the foundation concrete surface and driving in a non-shrink mortar for producing mortar buns in the frame body, the steel column is moved to the foundation. In the process of injecting the filler between the column base plate around the mortar bun when building into concrete and the foundation concrete, the output signal of the sensor element arranged in advance in the substantially ring-shaped frame is captured. A filling detection method for detecting a filling state of the filler based on the output signal.   A sensor element that converts electrical energy into mechanical energy is used as the sensor element, and an electric signal whose frequency changes with time is applied to the sensor element to detect vibration frequency characteristics of the sensor element, and the detected sensor element The filling detection method according to claim 1, wherein a filling state of the filler is detected based on a vibration frequency characteristic of the filler.   A substantially ring-shaped frame for producing a mortar bun using non-shrink mortar on the surface of the foundation concrete and immediately below the column base plate when the steel column connected with the column base plate is built into the foundation concrete. A mortar bun making device equipped with.   The mortar bun manufacturing apparatus of Claim 3 provided with the height adjustment means which enables adjustment of the height direction of the said substantially ring-shaped frame.   The mortar bun manufacturing apparatus according to claim 3 or 4, comprising a plurality of sensor elements that are spaced apart from each other on the outer peripheral surface of the substantially ring-shaped frame and each convert electric energy into mechanical energy. In the building detection system for detecting the filling state of the filler injected into the gap between the column base plate and the foundation concrete when the steel column connected to the column base plate is built into the foundation concrete,
A mortar bun making apparatus having a substantially ring-shaped frame for making a mortar bun using non-shrink mortar on the foundation concrete surface and immediately below the column base plate;
A filling detection device for detecting a filling state of the filler injected between the column base plate around the mortar bun and the foundation concrete based on an output signal of a sensor element arranged in the substantially ring-shaped frame; ,
A filling detection system comprising: The sensor element converts electrical energy into mechanical energy,
The filling detection device detects an oscillation frequency characteristic of each sensor element by applying an electric signal whose frequency changes over time to each of the plurality of sensor elements, and based on the detected oscillation frequency characteristic of each sensor element, The filling detection system according to claim 6, wherein the filling state of the filling material is detected.

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