JPH08219778A - Method for measuring and indicating shape of wall of xcavated groove - Google Patents

Abstract

PURPOSE: To provide a method for measuring and indicating a shape of a wall of an excavated groove that enables automatic calculation of an excavation accuracy and quick forming of the record of the excavation accuracy when measuring an inner section of the wall of the excavated groove by means of a groove wall measuring device. CONSTITUTION: A sensor 1 of a groove wall measuring device is lowered into an excavated groove 2 and a preparation operation wherein upper and lower limit values in data to be adopted are determined from a distribution of all of the data obtained by the sensor 1, is executed. After that, measuring is started, then a median is selected from the plurality of pieces of data obtained by the sensor 1 by each prescribed range of depth, a calculated excavation accuracy is indicated on a screen and the data is preserved.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for measuring and displaying an excavated groove wall shape for accurately grasping the verticality of the excavated groove wall and the groove wall shape.

[0002]

2. Description of the Related Art Conventionally, when excavating an underground continuous wall or the like, an ultrasonic groove wall measuring machine is used after completion of predetermined excavation in order to confirm the verticality of the excavation groove wall and the shape of the groove wall. It was For example, as an example of the underground wall, excavation is performed using a bucket 21 as shown in FIG. 8, and then a primary slime treatment is performed, that is, after the bottom is roughened, and a secondary slime is used using a suction device as shown in FIG. After the treatment, the excavation groove 2 is further equipped with a reinforcing material 24 to protect the reinforcing bar cage 23 shown in FIG. 10 and the end joint portion of the reinforcing bar cage 23 shown in FIG. I am setting up.

After the construction of the preceding element shown in FIGS. 8 to 12, the succeeding element is subsequently constructed in the same procedure as described above. At that time, the reinforcing element cage of the succeeding element is attached to the joint portion of FIG. By connecting the joints of and connecting concrete, a continuous underground wall is constructed. Therefore, as a conventional measuring method for the groove wall shape of the excavation groove 2 after completion of excavation of the excavation groove 2 as described above, the sensor 1 of the ultrasonic groove wall measuring machine as shown in FIG. At the same time, the measurement result is output from the recording paper 4 from the reception recorder 3 connected to the sensor 1.

By measuring the deviation from the planned line (design wall thickness line) by drawing a tangent line to the wall surface record of the recording paper 4 so that the measurer can match the excavation shape recorded by pointing and the like, a desktop electric calculator The excavation accuracy is calculated based on the above, and then the construction management documents are created in the prescribed format.
However, in the above-mentioned conventional method, the excavation accuracy is not immediately known at the time of measuring the groove wall, and the position of the excavation wall may be read depending on the measurer's handling of the recording paper 4 such as how to draw the tangent line or the deviation amount from the planned line. However, there was a problem that variations were seen among people.

On the other hand, according to the conventional measuring method, when the excavation groove is measured by the sensor 1 of the ultrasonic groove wall measuring machine, the measurement data in the width direction of the excavation groove as shown in FIG. 13 and the excavation as shown in FIG. The measurement data in the longitudinal direction of the groove will be drawn with a pen recorder, etc., but these data are the distance converted from the time when ultrasonic waves are reflected and bounced, and it is calculated from dispersed particles in a stable liquid. It measures all the reflected information such as reflections of. Normal sensor 1 is 1
When descending at a speed of 0 cm / sec, about 30 data were taken while descending by 5 cm, resulting in high density recording and many overlapping displays, making it difficult to read individual data.

Further, these data may include local collapse of the excavation groove 2 and the like, and from the viewpoint of the accuracy of the excavation groove 2 having a depth of several tens of meters, a local value in the depth direction. It is not always an accurate value to pick up, but the actual situation is that the final accuracy often depends on the experience of the measurer. In addition, experience is required for the accuracy calculation process depending on the soil quality, such as skin loss due to buried soil or improved ground at the top of the excavation trench 2, and natural collapse due to cobbles and gravel in the support layer at the bottom, and as a construction management document. There was a problem that it took a lot of time to create it.

[0007]

DISCLOSURE OF THE INVENTION The present invention has been made to solve the above-mentioned problems of the prior art. In the groove wall, which is carried out at the time of excavating an excavation groove wall such as an underground continuous wall or at the completion of excavation. In the measurement with the ultrasonic groove wall measuring machine of, the state of the excavation groove wall surface is properly grasped, and the automatic calculation of the excavation accuracy and
It is an object of the present invention to provide a method for measuring and displaying the shape of an excavation groove wall, which enables rapid creation of excavation accuracy records.

[0008]

SUMMARY OF THE INVENTION To achieve the above object, the present invention lowers a sensor of a groove wall measuring machine into an excavation groove, and an upper limit of data to be adopted from a distribution of all data obtained by the sensor. After performing the preparatory work to determine the value and the lower limit value, start the measurement, take the median value from a plurality of data obtained by the sensor for each predetermined depth width, the median value for each predetermined depth width And a method of displaying the calculated excavation accuracy and storing the excavation groove wall position and the excavation accuracy, and further displaying and displaying the calculated excavation accuracy. In, the measurement display method is capable of designating the depth range that affects the excavation accuracy calculation as the measurement condition.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below. First, the structure of the measuring device applied to the measuring and displaying method of the present invention is as shown in FIG. And the reception recorder 3 connected to the sensor 1.
And a winch 5 that can lower the sensor 1 into the trench 2.
In addition, a sequencer including a dedicated board 10 for removing noise of the measurement signal from the ultrasonic groove wall measuring device and converting it into groove wall data, and a programmable controller for transferring the converted groove wall data to the notebook personal computer 11 It consists of 12.

Next, a method for measuring and displaying the shape of the excavated trench wall by the measuring apparatus of this embodiment as described above will be described.
As described above, in the measurement data sent from the conventional ultrasonic measuring machine, normally, B of FIGS.
As shown in C, ultrasonic waves are scattered and reflected back from other than the wall surface to be measured, and some are mistakenly sent due to external factors such as electrical noise and internal factors unavoidable in terms of structure. .

Therefore, in the method of the present invention, the sensor 1 is lowered to the bottom of the excavation groove 2, and the upper limit value and the lower limit value of the data to be adopted are determined from the distribution of all the data obtained by the sensor 1. For example, even if the value obtained by converting the correct groove wall data into a distance is 75 cm, 75,200,1
0, 20, 80, 100, 75, 0, 0, 200, 20
0,0,0,75,75,5,5,200,200,7
Data such as 5 is sent from the ultrasonic groove wall measuring machine. A graph of the distribution of these data is shown in FIG. 6, for example. Therefore, except for the data that is not necessary as the data of the upper limit value and the lower limit value (20 <X <200) of the data to be adopted from FIG. 6, the data to be adopted is 75,
80,100,75,75,75,75.

After the above preparations are completed, the sensor 1 is set at GL ± 0 at the center position in the width direction of the excavation groove, the measurement start button is pressed, and then the sensor 1 is lowered into the excavation groove 2 via the winch 5. Then, the reception recorder 3 takes in the data. From the set state of GL ± 0 of sensor 1,
As shown in FIG. 5, when the sensor 1 is lowered into the excavation groove 2 at a rate of 10 cm / sec, for example, a width of 5 cm in the normal depth direction results in about 3 cm.
It is possible to capture 0 sets of trench wall data, and
For example, in the case of the excavation trench 2 having a depth of 20 m, about 1200 sets of trench wall data will be fetched.

Therefore, as described above, 75, 80, 100, 75, 75, 7 after removing unnecessary data
The median value, that is, 75 is taken from the data of 5,75. Here, if the average value of the above data is used instead of the median value, then 7
Since it becomes 9.29, there is a risk of a wide excavation width due to the influence of the local data of 80,100 in the depth direction of 5 cm, so in the present invention, the median value of 75 is taken from the above data.

Among the various calculation methods, the reason why the median value is selected is that the calculation method is simple and quick processing can be performed, and appropriate data for managing the trench width can be obtained. It is possible. If the calculation method is simple, it is easiest to obtain the average value, but in that case, there is a considerable error in obtaining appropriate data, which is inappropriate.

Further, it is best to take the most frequent value in order to acquire appropriate data, but in that case, the processing becomes complicated and the processing cannot be performed depending on the number of data, the configuration, etc. Sometimes. On the other hand, the present inventor has obtained several hundreds of sample data using an ultrasonic groove wall measuring device, and as a result of verification, confirmed that there is no problem even with a median value in obtaining appropriate data. In the present invention, the median value is used.

When the sensor 1 reaches the bottom of the trench 2,
When the measurement end button is pressed, the measured excavation groove wall is displayed on the excavation accuracy management screen of FIG. 2, and the excavation accuracy such as the excavation accuracy, the precision upper depth and the precision lower depth is automatically calculated by the personal computer 11 or the like, and the screen is displayed. Is displayed in. The operation flow of this apparatus after determining the range to be adopted from the distribution of data is shown in the operation flow chart of FIG. 3, and its flow chart is shown in FIG.

That is, the above-mentioned personal computer (abbreviated as a personal computer in the figure) 11 is capable of setting its measurement conditions, and the measurement signal from the sensor 1 is converted and converted from the transferred groove wall data. The excavation accuracy is calculated from the median value obtained by selecting appropriate data, the excavation accuracy is drawn on the excavation accuracy management screen of FIG. 2, and the measurement data is temporarily stored in the hard disk, and the temporarily saved measurement is performed. The data is copied on the floppy disk 13 or the like and output in a predetermined format at an office or the like where the printer 14 is installed.

Further, at the time of the above-mentioned measurement, the personal computer 11 is required to specify, as a measurement condition, a depth range which affects excavation accuracy calculation due to skin falling and natural collapse at the upper and lower portions of the excavation groove 2. Thus, the excavation accuracy can be recalculated by removing the depth range. The present invention can be applied not only to the underground continuous wall, but also to the case of measuring the shape of other excavated trench walls such as cast-in-place piles.

[0019]

As described above, according to the method for measuring and displaying the shape of the excavation groove wall of the present invention, the position of the excavation groove wall can be properly grasped, and the excavation accuracy can be quickly calculated automatically when measuring the excavation groove wall. As is clear, there is no human variation in the excavation accuracy due to handling such as drawing a tangent line on the recording paper as in the conventional case, and an appropriate measurement result can be obtained.

Further, as described above, by designating the depth range that influences the calculation of the excavation accuracy due to the soil properties, the required excavation accuracy of the excavation groove wall surface can be obtained again by automatic calculation outside the range. Furthermore, it is possible to quickly create easy-to-read construction management documents such as excavation accuracy measurement records and construction accuracy tables, and accumulate excavation groove wall information.

[Brief description of drawings]

FIG. 1 is a perspective view of a schematic arrangement according to an embodiment of an apparatus for measuring and displaying the shape of a trench wall by the measuring and displaying method of the present invention.

FIG. 2 is a front view of an excavation accuracy management screen of FIG.

FIG. 3 is an operation flow chart showing a series of operations of the apparatus of FIG. 1 after determining the range of data to be adopted from the distribution of data.

4 is a flow chart of the apparatus of FIG. 1 after determining the range of data to be adopted from the distribution of data.

FIG. 5 is an explanatory diagram of capturing groove wall data by a sensor that descends inside the excavation groove wall in FIG. 1;

FIG. 6 is a diagram showing a data distribution at the time of data acquisition by the ultrasonic groove wall measuring machine according to FIG.

FIG. 7 is a perspective view showing an arrangement of measuring devices according to a conventional measurement display method.

FIG. 8 is a conceptual diagram for explaining the excavation of a continuous underground wall.

FIG. 9 is a conceptual diagram of secondary slime processing after FIG.

FIG. 10 is a conceptual diagram of reinforced cage installation after FIG. 9.

11 is a conceptual diagram of joint part protection after FIG.

FIG. 12 is a conceptual diagram of concrete pouring after FIG. 11.

FIG. 13 is a record of measurement data in the width direction of an excavation groove by a conventional ultrasonic groove wall measuring device.

FIG. 14 is a record of measurement data in the longitudinal direction of FIG.

[Explanation of symbols]

 1 sensor 2 excavation ditch 3 receiver recorder X measured value

[Procedure amendment]

[Submission date] June 9, 1995

[Procedure Amendment 1]

[Document name to be amended] Statement

[Correction target item name] 0012

[Correction method] Change

[Correction content]

After the above preparations are completed, the sensor 1 is set at GL ± 0 at the center position in the width direction of the excavation groove, the measurement start button is pressed, and then the sensor 1 is lowered into the excavation groove 2 via the winch 5. Then, the reception recorder 3 takes in the data. As shown in FIG. 5, when the sensor 1 is lowered into the excavation groove 2 at a rate of 10 cm / sec from the set state of the sensor 1 of GL ± 0, about 30 sets of excavation groove wall data with a width of 5 cm in the normal depth direction are fetched. It is possible,
Therefore, for example, in the case of the excavation groove 2 having a depth of 20 m, about 1
It will take in 2,000 sets of groove wall data.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (71) Applicant 000150615 Haseko Corporation 2-32-1, Shibaura, Minato-ku, Tokyo (72) Inventor Kazuhisa Yamamoto 3-12-8 Shibaura, Minato-ku, Tokyo Ando Construction Co., Ltd. In the company

Claims (2)

[Claims] 1. A measurement of a groove wall measuring machine after descending the sensor into an excavation groove and performing a preparatory work for determining an upper limit value and a lower limit value of data to be adopted from a distribution of all data obtained by the sensor. Starting, and taking the median value from a plurality of data obtained for each predetermined depth width with the sensor, displaying the median value as the position of the excavation groove wall for each predetermined depth width, and the calculated excavation accuracy And a method for measuring and displaying the shape of the trench groove wall, wherein the position of the trench groove wall and the excavation accuracy are stored. 2. The method for measuring and displaying the excavation groove wall shape according to claim 1, wherein a depth range that affects excavation accuracy calculation can be designated as the measurement condition.