JP5032840B2 - Method and apparatus for measuring and managing excavation depth - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a control method and its equipment having high safety with high measurement precision by suppressing generation of air bubbles caused by negative pressure without requiring an air bubbles vent operation. <P>SOLUTION: In an equipment, an excavating and agitating equipment for excavating the ground surface vertically is set at the tip of the driving arm of a civil engineering work machinery, The equipment comprises: a head tank, set in the excavating and agitating equipment, filled with a liquid and opened to atmosphere; a pressure sensor, set in the civil engineering work machinery, measuring a liquid level of the head tank as a water head value H1 at the pressure receiving surface; a connection pipe connecting between the head tank and the pressure sensor; and a calculating means calculating excavation depth DP=-HI-HS+LO, when a height over the ground of the pressure sensor is represented as HS, and a vertical length between the head tank and the excavation tip of the excavating and agitating equipment is represented as L0. <P>COPYRIGHT: (C)2008,JPO&amp;INPIT

Description

  The present invention is mainly based on a civil engineering machine such as a backhoe, equipped with an excavating and agitating device at the tip of the arm, and excavating and agitating the surface soil relatively thickly from the ground surface while discharging cement-based solidifying material slurry and the like. In the ground improvement work, the depth of penetration of the tip of the excavator and the tilt angle of the excavator is calculated, displayed on the operator's display, and further recorded. The present invention relates to a method and apparatus for measuring and managing depth.

  There is a prior art implemented in the above technical field as shown in FIG. 10a (Patent Document 1). In this prior art, a pillar is set up on the civil engineering machine 10, the head tank 32 is fixedly installed thereon, and the pressure (or two pressures) of the pressure sensor 30 installed on the bracket 24 on the upper part of the excavating and stirring device 37. The average penetration pressure of the sensors 30 and 31) and the water head difference of the head tank 32 are used to measure the penetration depth, and the inverse trigonometric function calculator and angle are calculated from the distance and pressure difference between the two pressure sensors 30 and 31. The inclination angle of the mixing and stirring device was calculated using a transmitter.

  More specifically, the measuring device for the inclination angle and the excavation depth in the excavator shown in FIG. 10 a is obtained by excavating and agitating device 37 detachably provided at the tip of the hydraulic drive arm 14 in the self-propelled civil engineering machine 10. In the excavating apparatus, the head tank 32 provided in the civil engineering machine 10 and the two pressure sensors 30, 31 provided at different positions on the excavating and stirring apparatus 37 are connected via a pressure guiding pipe 33, and The calculation means for calculating the excavation depth and the inclination angle is coupled to the output sides 34 and 35 of the two pressure sensors 30 and 31, and the calculation means includes the respective head values from the pressure sensors 30 and 31 to the head tank 32, and The inclination angle of the excavating and stirring device 37 is calculated from the predetermined distance between the pressure sensors 30 and 31, and from either one of the pressure sensors 30 or 31 A water head value up Ddotanku 32 is obtained by adapted to calculating the excavation depth from the vertical length of the distance and the drilling stirrer 37 from the head tank 32 to a preset up construction ground 20.

In FIG. 10a, HS is the height from the head water surface of the head tank 32 provided on the civil engineering machine 10 to be applied to the construction ground 20, and L0 is the pressure received by the water level sensor 30 as a reference for the excavation depth. Since the dimensions from the surface to the excavation tip of the excavation stirring device 37 are all fixed values, if the head value of the variable obtained by the water level sensor 30 is H1, the vertical distance H1 based on the head value H1 is the pressure It is calculated by the calculation means from the water head value from the sensor 30 to the head tank 32, and the excavation depth DP is DP = H1-HS + L0.
Given in.

Further, when the excavating and stirring device 37 is vertical, as shown in FIG. 11, when the water level sensors 30 and 31 are mounted with a difference in height from each other, the dimension L1 between the pressure-receiving surfaces and the dimension difference ΔH0 in the vertical direction. Is a fixed value, the angle θ0 formed by the straight line connecting the pressure receiving surfaces of both water level sensors 30, 31 and the horizontal plane is
θ0 = sin ⁻¹ (ΔH0 / L1)
It is a fixed value given by.
At this time, if the two water level sensors 30, 31 are arranged on the same horizontal plane without any difference in height,
θ0 = 0
It is.

In the example of FIG. 10a, the head tank 32 is attached to the civil engineering machine 10 as high as possible by a post or the like. However, the pressure receiving surfaces 85 and 86 of the pressure sensors 30 and 31 detect negative pressure even when attached to a low position. There is no difference from the above operation example in the case of positive pressure.
However, in the case where the head tank 32 is installed at a low position as shown in FIG. 12, if the top part of the pressure guiding tube 33 reaches a predetermined height or more, a problem of malfunction may occur. If the height h from the liquid level of the head tank 32 to the top of the pressure guiding pipe 33 exceeds 10.3 m when the liquid of the pressure transmission medium filled in the head tank 32 is pure water, the top portion will be By becoming a vacuum. Therefore, when the head tank 32 is attached, it is necessary to set the height h of the top portion and the head tank 32 so as not to exceed 10.3 m. In particular, since water contains impurities, bubbles, etc., this height h is set to 7 to 8 m in anticipation of safety.
JP 2004-157112 A

The above-described conventional apparatus has the effect that it is possible to perform construction work with high work efficiency at low cost without requiring a high degree of skill from the worker and without arranging auxiliary notification personnel. Have.
However, there are some problems as follows.
(1) When the length of the excavating and stirring device 37 is short as in Patent Document 1, when the tip of the excavating and stirring device 37 is raised to the vicinity of the ground surface as shown in FIG. When the water level difference (H1) of the head tank 32 was up to 2 m, there was no problem that bubbles were deposited in the conduit of the liquid circulation system.
However, when the digging depth is about 4 m or more, as shown in FIG. 10 c, the length of the digging agitation device 37 increases accordingly, and the water level difference (H1) between the pressure sensor 31 and the head tank 32 exceeds 2 m. When the position of the head tank 32 is directly installed on the civil engineering machine 10, the negative pressure generated in the water conduit increases from the start of excavation when the excavating and stirring device 37 reaches the highest position to the initial penetration, and the management device Bubbles are deposited in the pressure guiding tube of the liquid circulation system, resulting in a large measurement error and a significant decrease in construction accuracy. Therefore, in order to remove air bubbles, air bubble removal work is required, which leads to a significant reduction in construction capacity.
(2) Therefore, in order not to generate a negative pressure in the pressure guiding pipe of the liquid circulation system, the position of the head tank 32 needs to be increased. For this purpose, as shown in FIG. 10d, the civil engineering machine 10 is provided with a support column and the head tank 32 is installed on the support column. The higher the support column supporting the head tank 32, the greater the construction. The vibration at the time or the like is amplified to give a large vibration to the head tank 32, which becomes unstable and increases the measurement error, and causes a safety problem.

  The present invention intends to provide a management method and apparatus that suppresses the generation of bubbles due to negative pressure even when the mounting position of the head tank is lowered, does not require a bubble removal operation, and has high measurement accuracy and safety. It is.

In the present invention, when excavating the ground surface only vertically, an excavation stirrer for excavating the ground surface vertically is provided at the tip of a drive arm in a civil engineering machine, and the excavation depth by the excavation stirrer is measured and managed. In the device
A head tank provided with a plurality of baffle plates provided at a predetermined interval in a liquid container which is provided in the excavating and stirring device and which is filled with liquid and opened to the atmosphere;
A pressure sensor that is provided in the civil engineering machine and measures the pressure level of the liquid level of the head tank as a water head value H1,
A pressure guiding pipe connecting between the head tank and the pressure sensor;
And a means for calculating a digging depth DP = −H1−HS + L0 when the ground height of the pressure sensor is HS and the vertical distance between the head tank and the digging tip of the digging agitator is L0.

In the case of excavating not only vertically but also in an inclined direction, the present invention, in addition to the above configuration,
An inclination angle sensor that is provided in the excavation agitator and measures an inclination angle θ with respect to a vertical line of the excavator agitator;
And a means for calculating a depth of excavation DP = −H1−HS + L0cos θ, where HS is the ground height of the pressure sensor and L0 is a vertical distance between the head tank and the excavation tip of the excavating and stirring device.

In the head tank, it is preferable that a plurality of baffle plates having a large number of flow holes are provided at predetermined intervals in a liquid container filled with liquid and opened to the atmosphere.
The pressure guiding tube can be directly confirmed as to whether or not bubbles are generated by forming a part or all of the pressure guiding tube with a transparent pipe.
If antifreeze is used, the liquid can be used even in cold regions or in winter.

The present invention has the following effects.
(1) Since the head tank is provided in the excavation agitation device and the pressure sensor is provided in the civil engineering machine, the head tank mounting position is increased regardless of the length of the excavation agitation device even when the excavation depth exceeds 4 m. There is no need.
Therefore, stable measurement can be performed without giving a large vibration to the head tank.
(2) Since the head tank is installed in the excavator and agitator and the pressure sensor is installed in the civil engineering machine, it is not necessary to make it so high that bubbles are generated even under negative pressure. Work is unnecessary, and construction capacity is greatly improved.
(3) When excavating not only vertically but also in an inclined direction, an inclination angle sensor is provided in the excavation stirrer, and the excavation depth DP = −H1−HS + L0 cos θ is easily calculated by a calculation means. Can be measured.
(4) By installing a plurality of baffle plates with a large number of flow holes in the liquid container constituting the head tank at predetermined intervals, the fluctuation of the liquid level that occurs during excavation can be suppressed and more accurate. Can measure.
(5) The pressure guiding tube can be directly confirmed as to whether or not bubbles are generated by forming a part or all of the pressure guiding tube with a transparent pipe.
(6) The liquid can be used even in a cold region or in winter if an antifreeze is used.

The present invention, when excavating the ground surface vertically by the excavation stirring device attached to the tip of the drive arm in the civil engineering machine,
Obtaining the head height H1 of the liquid level of the head tank provided at the upper end of the excavator and agitation device at the pressure receiving surface of the pressure sensor provided at a stable location such as the body of the civil engineering machine;
And calculating a depth of excavation DP = −H1−HS + L0 where HS is the ground height of the pressure sensor and L0 is the vertical distance between the head tank and the excavation tip of the excavator agitator.

In the case of excavating not only in the vertical direction but also in the inclined direction,
In addition to the step of obtaining the water head value H1, a step of detecting the excavation inclination angle θ with respect to the vertical line by the excavation agitator with an inclination angle sensor provided in the excavation agitator is further added. The ground height of the sensor is HS, the distance between the head tank and the excavation tip of the excavator agitator is L0, and the excavation depth DP = −H1−HS + L0 cos θ when the inclination angle of the excavator agitator with respect to the vertical line is θ. Calculate.

  When the liquid level height of the head tank provided in the excavating agitator is higher than the pressure receiving surface of the pressure sensor provided in the civil engineering machine, it is set to + H1, and the liquid level height of the head tank provided in the excavating agitator is When the pressure sensor is lower than the pressure receiving surface of the pressure sensor, the calculation is performed as -H1.

When excavating the ground surface vertically,
A head tank provided in the excavating and stirring device, filled with liquid and opened to the atmosphere;
A pressure sensor that is provided in the civil engineering machine and measures the pressure level of the liquid level of the head tank as a water head value H1,
A pressure guiding pipe connecting between the head tank and the pressure sensor;
And a means for calculating a digging depth DP = −H1−HS + L0 where HS is the ground height of the pressure sensor and L0 is a vertical distance between the head tank and the digging tip of the digging agitator.

When excavating not only in the vertical direction but also in the inclined direction,
A head tank provided in the excavating and stirring device, filled with liquid and opened to the atmosphere;
An inclination angle sensor that is provided in the excavation agitator and measures an inclination angle θ with respect to a vertical line of the excavator agitator;
A pressure sensor that is provided in the civil engineering machine and measures the pressure level of the liquid level of the head tank as a water head value H1,
A pressure guiding pipe connecting between the head tank and the pressure sensor;
And a means for calculating a digging depth DP = −H1−HS + L0cos θ when the ground height of the pressure sensor is HS and the vertical distance between the head tank and the digging tip of the digging agitator is L0.

In the head tank, a plurality of baffle plates having a large number of flow holes are provided at predetermined intervals in a liquid container filled with liquid and opened to the atmosphere.
In order to confirm the generation of bubbles, the pressure guiding tube is a partly or entirely transparent pipe.
The liquid is antifreeze so that it can be used even in cold regions during the winter.

Hereinafter, Embodiment 1 of the method and apparatus for measuring and managing the excavation depth according to the present invention will be described with reference to the drawings.
First, a general series of flow from the manufacture and supply of grout to excavation and agitation of the ground for ground improvement and injection of grout will be described with reference to FIG.
A grout base material, such as cement, is sent from the silo 40 to the measuring tank 43 via the conveyor 41, supplied with water (not shown), sent to the stirrer 42 and stirred by the stirring blade 44, and the finished grout 49 is supplied. The tank 45 is further pumped by a grout pump 47 via a flow meter 46, and is fed to a drilling and stirring device 37, which is a front attachment, via a pumping hose 48, and a grout 49 is injected into the ground from the lower end of the column 38. Meanwhile, the soft soil is excavated by the agitation bit 39 of the excavating and agitating device 37 and agitated and mixed. The improved soil 23 is formed by sequentially excavating the excavation holes 21 in the construction ground 20.
In FIG. 6, reference numeral 53 denotes a generator.

An apparatus for measuring and managing the depth of excavation mounted on the civil engineering machine 10 and the excavating and agitating device 37 will be described with reference to FIG. 1. In the civil engineering machine 10 of the type self-propelled by the crawler 11, hydraulic drive arms 12 and 13 are provided. An excavation and stirring device 37 that is sequentially connected and can excavate a relatively thick topsoil layer as a front attachment is detachably attached via a bracket 24 at the front end. In the excavating and stirring device 37, a stirring bit 39 is rotatably provided at the lower end portion of the vertical excavating and stirring device 37, and the construction ground 20 is excavated by the stirring bit 39.
FIG. 1 is a side view showing a state in which the hole wall 19 is correctly and vertically constructed. The excavator agitation device 37 is generally configured such that an operator can freely adjust the excavation depth and the excavation inclination angle from the cockpit via the hydraulic drive arms 12 and 13 and the hydraulic cylinders 18 and 18.

  The bracket 24 at the upper end of the excavating and stirring device 37 is provided with a head tank 32 and an inclination angle sensor 57 supported by a support member 50. A pressure sensor 31 is provided at one place of the stable vehicle body of the civil engineering machine 10. The pressure sensor 31 is connected to the head tank 32 via a transparent pressure guiding pipe 33 provided along the hydraulic drive arms 12 and 13 so that the water head pressure from the head tank 32 can be measured.

A monitoring panel 36 is installed in the cockpit 15 of the civil engineering machine 10. As shown in FIGS. 5A and 5B, the monitoring panel 36 is provided with a display 81, a power switch 82, and a zero setting switch 83 on the front.
This display 81 not only has a display function, but can also employ a programmable display having a panel touch switch function. It is also possible to selectively notify the operator of progress, construction deviation, etc.

The mounting and specific structure of the head tank 32 and the inclination angle sensor 57 will be described with reference to FIGS.
In FIG. 2, a plurality of support members 50, which are aligned with the pillars 38 of the excavation stirring device 37, are fixed to a bracket 24 that connects the hydraulic drive arm 13 and the excavation stirring device 37, and a head is attached to the upper end portion of the support member 50. The mounting plate 56 to which the tank 32 and the inclination angle sensor 57 are attached is fixed.
As shown in FIGS. 3 (a) and 3 (b), the head tank 32 is composed of a liquid container 55 which is a circular cylinder. The liquid container 55 is provided with a liquid level monitoring tube 29. The liquid 25 as a pressure transmission medium is filled. Since this liquid 25 is free from environmental pollution and is inexpensive, water is generally used. However, the liquid 25 is not limited to water, and in cold regions, an antifreeze for vehicles mainly composed of ethylene glycol is used. In addition, alcohols having a low viscosity can be used to increase the response speed, or oils having a high viscosity can be used to decrease the response speed.

The liquid container 55 is provided with a fluid inlet 28 and a bubble vent pipe 52 at the upper end, and a liquid outlet 64 and a spare pipe connection port 73 at the lower end. A liquid level monitoring tube 29 is attached to the side surface of the liquid container 55.
The bubble removal pipe 52 is provided with a bubble removal valve 65 that is opened when the head tank 32 is measured and closed when not used for transportation. The liquid outlet 64 and the pressure sensor 31 are connected by a transparent pressure guiding tube 33 in order to confirm the generation of bubbles.
In the liquid container 55, a baffle plate 26 in which a large number of small flow holes 27 are formed is housed in order to prevent the liquid level of the liquid 25 from violently shaking during excavation by the excavating and stirring device 37. As shown in FIG. 4 (a), the baffle plate 26 is formed by drilling through holes 27 having a diameter of about 6 to 10 mm at intervals of about 10 to 15 mm on an iron plate having a thickness of about 1 mm. 3-4 sheets are arranged vertically at intervals of -15 mm. Further, in order to deal with the shaking in all directions, as shown in FIG.

  For example, a commercially available servo-type gravitational acceleration detection type is used as the tilt angle sensor 57 and is connected to the monitoring panel 36 by a signal cable 34, and the tilt angle signal emitted from the tilt angle sensor 57 is stored in the cockpit 15. It is given to the monitoring board 36 provided in, and is configured to be displayed as an inclination angle of the excavating and stirring device 37.

In the configuration as described above, the grout 49 pumped by the grout pump 47 is sent to the excavating and stirring device 37 via the pumping hose 48 and injected into the ground from the lower end of the support column 38, while the stirring bit 39 is used for soft soil. Drill and stir to mix. Generally, the improvement soil 23 is formed by standing upright the support | pillar 38 of the excavation stirring apparatus 37, and excavating the excavation hole 21 perpendicular | vertical to this construction ground 20 sequentially.
In addition, as shown in FIG. 9, when there is a buried pipe 72 or the like in the construction area and it is not possible to excavate vertically, the improved soil 23 is formed by intentionally excavating with an inclination.

Next, the measurement principle of the excavation depth by the excavation stirring device 37 will be described.
7A and 7B,
HS is the height from the pressure receiving surface of the pressure sensor 31 installed in a stable state on the civil engineering machine 10 to be applied to the construction ground 20,
L0 is a dimension in the vertical direction from the liquid level of the head tank 32, which serves as a reference for the excavation depth, to the excavation tip of the excavation agitator 37, and both are fixed values.
Here, the water head value H1 is a height difference calculated based on the water head difference between the liquid level of the head tank 32 and the pressure receiving surface of the pressure sensor 31 serving as a reference for excavation depth, and is a variable value, but the water head difference is measured. If it is easy to find.
Therefore, the excavation depth DP is given by the following equation.
DP = -H1-HS + L0
When the excavation direction is not only vertical but also includes the inclination direction when excavating and agitating the excavator agitation device 37 as shown in FIG. 9, the general formula is given by the following equation.
DP = −H1−HS + L0 cos θ
Here, since the inclination angle sensor 57 is installed in the excavation stirring device 37, L0 cos θ can be easily calculated.

More specifically, as shown in FIG. 7A, when the liquid level of the head tank 32 is higher than the liquid level of the pressure sensor 31 as a reference for the excavation depth, the excavation is performed in the vertical direction. In this case, since the head value H1 ≧ 0 and cos θ = 1, the excavation depth DP is given by the following equation.
DP = -H1-HS + L0
Further, as shown in FIG. 7 (b), when the liquid level of the head tank 32 is lower than the liquid level of the pressure sensor 31 serving as a reference for the excavation depth, and when excavating in the vertical direction, Since the head value H1 <0 and cos θ = 1, the excavation depth DP is given by the following equation.
DP = − (− H1) −HS + L0 = H1−HS + L0
As shown in FIG. 9, the excavation depth DP when excavating with the excavation stirring device 37 inclined, that is, excavating at an angle θ with respect to the vertical line is given by the following equation.
DP = −H1−HS + L0 cos θ

  In FIG. 7 (b), when the water head value H1 <0, a negative pressure is applied to the liquid circulation system for depth detection. In the present invention, the pressure sensor 31 is used for the civil engineering machine 10 without a column. An experiment was conducted in which the negative pressure value was about 2 m at most and no bubbles were generated by installing the head tank 32 in a stable state directly on the vehicle body and attaching the head tank 32 to the upper end of the excavating and stirring device 37. Has been confirmed by. However, when H1 is −2 m or more, generation of bubbles is recognized, and it has been confirmed that measurement accuracy is affected.

Next, FIG. 8 is a block diagram showing a specific calculation method according to the equation for obtaining the excavation depth DP described based on FIGS. 7 (a) and 7 (b).
In FIG. 8, the analog signal from the pressure sensor 31 that transmits the head pressure of the head tank 32 is digitally converted by the A / D converter 51 to obtain the head pressure H1, and the head value signal H1 is added to the addition calculator 67. Sent to. The reference head setter 66 calculates −HS + L0 cos θ based on the output value θ of the tilt angle sensor 57 and sends it to the addition calculator 67. In this addition calculator 67, −H1 and −HS + L0 cos θ are added to obtain the excavation depth DP (= −H1−HS + L0 cos θ), which is output to the recorder 62 via the D / A converter 69, and the conversion amplifier 68 Is output to the depth indicator 70, and is further output as a drilling depth recording signal 71 to a recording medium (M) (not shown) to be recorded, displayed and stored.
When the excavating and agitating device 37 excavates vertically, the tilt angle signal cos θ = 1 from the tilt angle sensor 57 is input to the reference head setting device 66, and the known − HS + L0 is sent to the addition calculator 67 and added to -H1.

  The tilt angle signal of the excavating and agitating device 37 obtained by the subtracting calculator 57 is output to the recorder 62 through the D / A converter 59 and recorded, and also to the tilt angle indicator 60 through the conversion amplifier 58. It is output and displayed, and is further output as a tilt angle recording signal 61 to a recording medium (M) (not shown) and stored in the recording medium.

  In the embodiment shown in FIG. 8, the output of the tilt angle sensor 57 and the reference head setting device 66 is fixed in advance in order to simplify the description. However, the digitally converted output value of the pressure sensor 31 that is generated when the excavating and stirring device 37 on which the head tank 32 is mounted is held vertically and placed at a depth of zero is shown in FIGS. It can be configured to automatically set by taking in through a latch gate by a signal from the zero setting switch 83 of the monitoring panel 36 and storing it in a memory register.

When the pressure transmission medium is a liquid other than water and the liquid density is ρ, the atmospheric pressure is p, and the gravitational acceleration is g, the height h is
h <p / (ρg)
It is desirable to set to.

  In the embodiment, as shown in FIG. 1, a bracket 24 is detachably attached to the tip of a hydraulic drive arm 13 as a front attachment, and a stirring bit that rotates horizontally on both sides of a column 38 at the lower end of the bracket 24. Although what attached 39 was demonstrated, what attached the excavation and stirring blade to the endless belt chain as shown in FIG. 10 may be used.

  In the above embodiment, the case where the ground surface is excavated and stirred as the excavator is used for an excavator that improves the surface ground by agitating and agitating the ground surface, but the front attachment is not necessarily accompanied by grout injection. It may be used for an excavator that simply excavates the ground surface.

It is explanatory drawing at the time of an excavation which shows one Example of the method and apparatus for measuring and managing the excavation depth by this invention. FIG. 5 is a detailed perspective view of a state in which the head tank 32 and the tilt angle sensor 57 are attached. FIG. 4A is a front view in which a part of the head tank 32 is cut away, and FIG. (A) (b) is a perspective view which shows the example from which each baffle plate 26 attached to the inside of the head tank 32 differs. An example of the monitoring board provided in a cockpit is shown, (a) is a side view, (b) is a front view. It is explanatory drawing of a series of operation | work which also added the manufacture and supply apparatus of the grout to inject | pour into the ground improvement excavation and the stirring part. It is for demonstrating the measurement principle of excavation depth DP, (a) is explanatory drawing when water head value H1 is +, (b) is explanatory drawing when water head value H1 is-. It is a block diagram which shows the specific calculation method which calculates | requires excavation depth and an inclination angle. It is explanatory drawing which shows the state which is inclined and excavated. It is explanatory drawing of the vertical excavation state for demonstrating background art. It is explanatory drawing for demonstrating background art, Comprising: It is explanatory drawing in case the length of the excavation stirring apparatus 37 is short. It is explanatory drawing for demonstrating background art, Comprising: The length of the excavation stirring apparatus 37 is long, and it is explanatory drawing at the time of installing the head tank 32 in the civil engineering machine 10 directly. It is explanatory drawing for demonstrating background art, Comprising: The length of the excavation stirring apparatus 37 is long, and is explanatory drawing at the time of installing the head tank 32 on a high support | pillar. It is explanatory drawing for calculating | requiring excavation depth by background art. It is other explanatory drawing for calculating | requiring excavation depth by background art.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 10 ... Civil engineering machine, 11 ... Crawler, 12 ... Hydraulic drive arm, 13 ... Hydraulic drive arm, 14 ... Hydraulic drive arm, 15 ... Cockpit, 17 ... Bit, 18 ... Hydraulic cylinder, 19 ... Vertical hole wall, 20 ... Construction ground, 21 ... excavation hole, 22 ... excavation bottom surface, 23 ... improved soil, 24 ... bracket, 25 ... liquid, 26 ... baffle plate, 27 ... flow hole, 28 ... fluid inlet, 29 ... liquid level monitoring pipe, 30 DESCRIPTION OF SYMBOLS ... Pressure sensor, 31 ... Pressure sensor, 32 ... Head tank, 33 ... Pressure guiding pipe, 34 ... Signal cable, 35 ... Signal cable, 36 ... Monitoring board, 37 ... Excavation stirring apparatus, 38 ... Strut, 39 ... Stirring bit, 40 ... silo, 41 ... conveyor, 42 ... stirrer (agitator), 43 ... weighing tank, 44 ... stirring blade, 45 ... supply tank, 46 ... flow meter, 47 ... grout pump, 48 ... pressure feed hose, 49 ... grout, 5 DESCRIPTION OF SYMBOLS ... Supporting member, 51 ... A / D converter, 52 ... Bubble vent pipe, 53 ... Generator, 55 ... Liquid container, 56 ... Mounting plate, 57 ... Inclination angle sensor, 58 ... Conversion amplifier, 59 ... D / A converter, DESCRIPTION OF SYMBOLS 60 ... Inclination angle indicator, 61 ... Recording medium inclination angle signal, 62 ... Recorder, 64 ... Liquid outlet, 65 ... Air bubble removal valve, 66 ... Reference head setting device, 67 ... Addition computing unit, 68 ... Conversion amplifier , 69 ... D / A converter, 70 ... Depth depth indicator, 71 ... Depth signal for recording medium, 72 ... Embedded pipe, 73 ... Spare pipe connection port, 81 ... Display, 82 ... Power switch, 83 ... Zero setting switch 85 ... pressure receiving surface, 86 ... pressure receiving surface, 87 ... receiver, 88 ... receiver.

Claims (7)

In the method of measuring and managing the excavation depth by this excavation agitation device, provided at the tip of the drive arm in the civil engineering machine is an excavation agitation device capable of excavating the ground surface vertically,
Wherein is found provided drilling stirrer, a liquid was filled, and, in a liquid container open to the atmosphere, the liquid surface height of the head tank which is installed a plurality of baffles bored a number of circulation holes at predetermined intervals The step of obtaining these water head values H1 at the pressure receiving surface of the pressure sensor provided in the civil engineering machine,
The depth of excavation comprises the step of calculating an excavation depth DP = −H1−HS + L0 where HS is the ground height of the pressure sensor, and L0 is the vertical distance between the head tank and the excavation tip of the excavation agitator. How to manage and measure. In the method of measuring and managing the excavation depth by this excavation agitation device, provided at the tip of the drive arm in the civil engineering machine is an excavation agitation device capable of excavating the ground surface,
Liquid level height of a head tank provided with a plurality of baffle plates provided at a predetermined interval in a liquid container that is provided in the excavating and stirring device and is filled with liquid and opened to the atmosphere. Obtaining these water head values H1 at the pressure receiving surface of the pressure sensor provided in the civil engineering machine,
A step of detecting a digging inclination angle θ with respect to a vertical line by the digging agitator with an inclination angle sensor provided in the digging agitator;
A step of calculating the depth of excavation DP = −H1−HS + L0cosθ from the inclination angle θ while setting the ground height of the pressure sensor to HS, the distance between the head tank and the excavation tip of the excavator agitator to L0. A method for measuring and managing the depth of excavation. In the apparatus for measuring and managing the depth of excavation by this excavation agitation device, provided at the tip of the drive arm in the civil engineering machine is an excavation agitation device capable of excavating the ground surface vertically,
A head tank provided with a plurality of baffle plates provided at a predetermined interval in a liquid container which is provided in the excavating and stirring device and which is filled with liquid and opened to the atmosphere;
A pressure sensor that is provided in the civil engineering machine and measures the pressure level of the liquid level of the head tank as a water head value H1,
A pressure guiding pipe connecting between the head tank and the pressure sensor;
Means for calculating a digging depth DP = −H1−HS + L0 when HS is a ground height of the pressure sensor and L0 is a vertical distance between the head tank and a digging tip of a digging agitator. A device that measures and manages drilling depth. In the apparatus for measuring and managing the excavation depth by this excavation agitation device, provided at the tip of the drive arm in the civil engineering machine is an excavation agitation device capable of excavating the ground surface,
A head tank provided with a plurality of baffle plates provided at a predetermined interval in a liquid container which is provided in the excavating and stirring device and which is filled with liquid and opened to the atmosphere;
An inclination angle sensor that is provided in the excavation agitator and measures an inclination angle θ with respect to a vertical line of the excavator agitator;
An inclination angle sensor which is provided in the excavation agitator and detects an excavation inclination angle θ with respect to a vertical line by the excavation agitator;
A pressure sensor that is provided in the civil engineering machine and measures the pressure level of the liquid level of the head tank as a water head value H1,
A pressure guiding pipe connecting between the head tank and the pressure sensor;
And means for calculating a depth of excavation DP = −H1−HS + L0cos θ when the ground height of the pressure sensor is HS and the vertical distance between the head tank and the excavation tip of the excavation agitator is L0. A device that measures and manages drilling depth. 5. The excavation according to claim 3, wherein the pressure sensor is provided in one place of a stable vehicle body of the civil engineering machine, and the head tank is provided in a bracket connecting the drive arm and the excavation stirring device. Device for measuring and managing depth. 6. The apparatus for measuring and managing the excavation depth according to claim 3, 4 or 5 , wherein the pressure guiding pipe is partially or entirely made of a transparent pipe.   6. The apparatus for measuring and managing the depth of excavation according to claim 3, wherein the liquid is made of antifreeze.

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