JPH06158645A - Method for managing construction work of underground continuous wall - Google Patents

Abstract

PURPOSE:To enhance construction manageability by determining the position of an excavating machine based on a signal from a GPS receiver provided at the end of a boom, then positioning the excavating machine, and controlling water level based on a signal from a GPS receiver provided on the water surface of an excavated channel. CONSTITUTION:To determine the position of an excavating machine 3, an excavating position is preinput and a signal of a GPS satellite is input from a GPS receiver 10 to calculate the position of the excavating machine 3 and it is displayed in a display 13. The deviation between the position of the excavating machine 3 and the excavating position is computed and displayed in the display 1 3 and when the deviation in position is zero the position of the excavating machine 3 is determined and measurement is finished, whereas when the deviation is not zero it is displayed in an operator display 14 to report position modification to an operator 7 for RETURN. To measure water level, the level of a water surface W is preinput to a water level measuring device 21, which receives a signal of the GPS satellite from a GPS receiver 20 and computes the water level therefrom and displays it in a display 22. When the deviation in water level is plus, a stabilizer is supplied for control.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a construction management method for underground continuous wall construction using GPS surveying.

[0002]

2. Description of the Related Art In the construction of a continuous underground wall, the excavation position must be accurately determined in order to maintain the continuity of the continuous underground wall. Conventionally, as shown in FIGS. 5 and 6, the excavator 3 is visually aligned with the marking M1 on the top of the guide wall 2. That is, the signaler 8 on the guide wall 2 makes the marking M provided on the top surface of the excavator 3 suspended in the excavation groove 1 by the suspension wire 4 on the boom 5 of the base machine 6.
2 and the distance D between the marking M1 on the guide wall 2
1 and D2 are measured. And both markings M1, M2
The deviation E indicates that the signaler 8 instructs the driver 7 to position the excavator 3.

On the other hand, the water level of the stabilizing liquid during excavation must be accurately measured in order to prevent collapse of the excavation groove by the stabilizing liquid. There are the following three conventional methods.

(1) The ultrasonic distance meter 30 measures the distance to the water surface W (FIG. 7).

(2) The distance to the reflection plate 32 installed on the water surface W is measured by the light wave distance meter 31 (FIG. 8).

(3) The water level on the water surface W is measured by the float 33 (FIG. 9).

[0007]

The conventional positioning by marking alignment has the following problems.

(1) Guide wall 2 prior to excavation
It is necessary to provide the marking M1 on the top. But,
For example, when the excavation positions are arranged on the circumference, it takes time.

(2) The area around the work place is often contaminated with muddy water or the like, and the marking M1 on the guide wall 2 is easily lost.

(3) The marking M1 on the guide wall 2 cannot display the excavation position (the central vertical line V of the excavator 3). That is, the central vertical line V is in the space. Therefore, the marking M1 on the guide wall 2
Is the substitute position for the center of excavation. Therefore, errors due to the markings M1 and M2 occur at three points between the excavation center and the marking position, between both the markings M1 and M2, and the center of the excavator 3 between the markings M1.

Therefore, originally, it is best to directly align the excavation center with the excavator center.

On the other hand, the water level measurement by the conventional method has the following problems.

(1) Method using ultrasonic distance meter ◎ There is an erroneous measurement due to suspended matter on the water surface W. In addition, the installation location of the ultrasonic range finder 30 is affected by vibration.

(2) Method using an optical distance meter ◎ It is very difficult to follow the water surface W with the planar position of the reflector 32 fixed.

(3) Scale method ◎ There is a reading error of the scale 33, and it is affected by the specific gravity of the muddy water.

The present invention has been made in view of the above problems, and provides a construction management method for underground continuous wall construction which improves the construction management system by accurately measuring the position of an excavator and the water level during excavation. It is an object.

[0017]

[Observation] As a result of various studies, the present inventor has found that GPS (GLo)
It has been found that a GPS survey using a bal Positioning System (SAT) satellite can measure a three-dimensional absolute position in a space of a fixed point, and this GPS survey can be used to measure the position of an excavator and the water level during excavation.

The present invention was made based on this finding.

[0019]

According to the method of the present invention, the GP is placed on the vertical line of the excavator center at the tip of the boom where the excavator is suspended.
The S receiver is installed to find the position of the excavator by GPS surveying, and the excavator is positioned by the positional deviation between the obtained result and the predetermined excavator position, and the GPS receiver is installed on the water surface during excavation. Then, the water level is obtained by GPS surveying, and the water level is controlled by the water level deviation between the obtained result and a predetermined water level.

The GPS receiver uses independent stations for measuring the position of the excavator and the position of the water surface, respectively. When integrating, it is preferable to add a fixed station on the ground and use the relative survey method.

Further, it is preferable that the GPS receiver is installed at the tip of the boom via a receiver pedestal, and the pedestal is configured so as to be able to maintain a horizontal state even when the boom is undulated.

[0022]

According to the present invention, the position of the excavator and the position of the water surface during excavation can be accurately obtained by GPS surveying, and the positioning of the excavator and the control of the stabilizing solution can be effectively performed.

At this time, since the position of the excavator is directly measured, no marking is required, and since the central position of the excavator and the excavation position are directly compared with numerical data, the error is small.

Further, since the GPS receiver itself is installed on the surface of the water, it is not affected by other suspended matter or vibration. Further, it is not necessary to fix it because it can be placed at any plane position.

[0025]

Embodiments of the present invention will be described below with reference to the drawings.

In these drawings, the parts corresponding to those in FIG. 5 are designated by the same reference numerals, and the duplicated description will be omitted.

FIG. 1 shows an example of an apparatus for carrying out position measurement using a single station of the GPS satellite of the present invention.
In the figure, a receiver pedestal 11 is provided at the tip of the boom 5, and the pedestal 11 is held in a horizontal state even when the boom 5 is undulated by means not shown. The GPS receiver 10 is mounted on the pedestal 11 and the excavator 3
It is provided so that it may be located on the central vertical line V. The receiver 10 is connected via a cradle 11 to a position measuring device 12 composed of a personal computer equipped with a display 13 by a circuit L1, and the device 12 is connected to a driver of the base machine 6 by a circuit L2. The display 14 is connected.

When measuring the position of the excavator 3, as shown in FIG. 2, the excavation position has been input in advance, and the GPS satellite signal is input from the GPS receiver 10 (step S
1) The position of the excavator 3 is calculated and displayed on the display 13 (step S2). Next, the position deviation between the position of the excavator 3 and the excavation position is calculated (step S3) and displayed on the display 13 (step S4). Next, it is determined whether or not the positional deviation is zero (step S5), and if YES, the position of the excavator 3 is determined (step S6),
When the measurement is completed and the result is NO, the result is displayed on the driver display 14 to notify the driver 7 of the position correction (step S
7) Return.

FIG. 3 shows an example of an apparatus for performing water level measurement using a single station of the GPS satellite of the present invention.
In the figure, a GPS receiver 20 is provided on the water surface W of the trench 1.
Is floated and is connected by a circuit L2 to a water level measuring device 21 composed of a personal computer having a display 22. The device 21 is connected to a variable flow pump 24, which is interposed in a stable liquid supply pipe 23 by a circuit L4.

At the time of measuring the water level, the water level measuring device 21 is provided with a water surface W necessary to prevent the collapse of the excavation trench 1 in advance.
The water level of has been entered. The water level measuring device 21 uses GPS
A GPS satellite signal is received from the receiver 21, and the water level is calculated from the signal and displayed on the display 22. Next, the deviation between the water level input in advance and the water level obtained by the operation is calculated, and if the deviation is positive, a control signal is output to the variable flow pump 24 to replenish the stabilizing liquid so that the deviation becomes zero. Control.

FIG. 4 shows another embodiment of the device for carrying out the present invention, which is provided with a GPS receiver 40 which is a fixed station of GPS satellites, and is connected to a position / water level measuring device 41 by a line L5, and the device 41 is provided. GPS receivers 10, 2 which are mobile stations
In this example, 0 is connected to the excavator position control device 42 and the water level control device 43 to integrate the construction management.

[0032]

As described above, according to the present invention, the following effects can be obtained. (1) It is possible to accurately measure the position of the excavator and the water level during excavation, and improve the workability of construction. (2) When measuring the position, the conventional marking and signaling person are unnecessary. (3) When measuring the water level, the water level measuring device can be installed in any place, which does not hinder other work.

[Brief description of drawings]

FIG. 1 is an overall configuration diagram showing an example of an apparatus for performing position measurement according to the present invention.

FIG. 2 is a control flowchart.

FIG. 3 is an overall configuration diagram showing an example of an apparatus for performing water level measurement according to the present invention.

FIG. 4 is an overall configuration diagram showing an example of an apparatus for performing position / water level measurement according to the present invention.

FIG. 5 is a side view showing an example of a conventional position measuring device.

FIG. 6 is a top view of FIG.

FIG. 7 is a side view showing a conventional water level measuring device using an ultrasonic distance meter.

FIG. 8 is a side view showing a water level measuring device using a conventional optical distance meter.

FIG. 9 is a side view showing a conventional float water level measuring device.

[Explanation of symbols]

 E ... Deviation M1, M2 ... Marking 1 ... Excavation groove 2 ... Guide wall 3 ... Excavator 4 ... Suspension wire 5 ... Boom 6 ... Base machine 7 ...・ Driver 8 ... Signal 10,20,40 ... GPS receiver 11 ... Receiver cradle 12 ... Position measuring device 13,22 ... Display 21 ... Water level measuring device 23・ ・ ・ Liquid supply pipe 24 ・ ・ ・ Variable flow pump 30 ・ ・ ・ Ultrasonic range finder 31 ・ ・ ・ Light wave range finder 32 ・ ・ ・ Reflector 33 ・ ・ ・ Float 41 ・ ・ ・ Position / water level measuring device 42 ・..Excavator position control device 43 ... Water level control device

Claims (1)

[Claims] 1. A GPS receiver is installed on a vertical straight line of the center of the excavator at the tip of the boom where the excavator is suspended, and the position of the excavator is set to G.
Obtained by PS surveying, positioning the excavator by the positional deviation between the obtained result and the predetermined excavator position, and installing the GPS receiver on the water surface during excavation to obtain the water level by GPS surveying A construction management method for underground continuous wall construction, characterized in that the water level is controlled by the water level deviation between the result and a predetermined water level.