JP2003119784A - Pile driving system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a pile driving system capable of reducing artificial work and easily and precisely carrying out a pile driving work within a short period. SOLUTION: When a driving point is positioned in the case of pile driving, an antenna for receiving position measuring information transmitted from an artificial satellite is provided to a pile driving hammer put on a pile driver, operation processing of the information received from the antenna is made by a computer, an obtained position co-ordinate is confirmed by a display, and a pile is driven in a position coinciding with a design co-ordinate value.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pile driving system for driving piles by using a pile driver at a civil engineering or construction site.

[0002]

2. Description of the Related Art In recent years, in the field of surveying, a GPS (Global Positioning System) capable of obtaining a specific position on the ground based on positioning information measured by an artificial satellite has been widely used.

By the way, in the case of piling work, in order to determine the driving position, a known point existing in the construction site or its surroundings is used as a base point, and a point corresponding to the designed driving position is determined based on the known point. You need to figure out.

It is also necessary to monitor the state of the pile during the work of placing the pile to monitor whether the pile has penetrated while maintaining the planned posture. By measuring the amount of displacement such as the rebound amount, it is necessary to manage the actual driving depth, the driving speed, and the work efficiency with respect to the design driving depth of the pile.

Since the allowable bearing capacity of the pile can be obtained by measuring the amount of displacement described above, it is recorded as a record with the final driving amount for each pile, and a countermeasure construction method corresponding to the property of the ground is taken. Can be taken.

Conventionally, the following means have been adopted for performing the above work.

In determining the placement position, a reference point is added from a known point existing at or near the construction site to the vicinity of the planned placement point using a surveying instrument such as a transit or theodolite. The additional reference points were used to identify the points that matched the design placement position.

When monitoring the condition of piles during pile driving and managing the amount of displacement, a reference is set by marking the piles,
A method of measuring the displacement has been used by an optical system surveying instrument or the like installed at a place away from the placement point.

When measuring the amount of rebound,
A measurement sheet was attached to the pile being placed, a person fixed the arm with a wooden frame, etc., and recorded the displacement amount with a pencil.

[0010]

The above-mentioned conventional method has the following problems.

When determining the driving position of the pile, if the known point and the planned driving point are far from each other, many additional reference points must be provided, which requires a lot of workers, labor and time. Becomes In the case of a place with poor visibility, it is extremely difficult to use a surveying instrument such as the transit or theodolite that requires collimation.

Even when the pile condition, displacement amount, and rebound amount are measured during the placing work, the marking must be done manually, so that the pre-work takes time and labor, and the placing site. There was a problem that the work could be dangerous depending on the situation.

Further, the measurement work is performed by human eyes and manual work. Therefore, the measured values vary depending on the person who records the data, and the statistical data also depends on the human hand, so that the work time is very long. There was a problem that

Further, since the installation location of the surveying instrument must be installed at a place away from the setting point, communication between the placing operator and the surveyor must be made by using some communication means. In some cases, it was not possible to secure the optimum installation location due to poor visibility and other reasons.

The present invention is not limited to using the above-mentioned GPS as a means for simply obtaining position information.
The purpose is to provide a pile driving system that can be used more positively and that can reduce the human work at the time of pile driving and can easily and accurately drive a pile in a short period of time. It is in.

[0016]

In view of the development of such surveying technique, the present invention utilizes the system having the above-mentioned advantages to overcome the above-mentioned problems by the following pile driving method. And devise a device.

[0017] The above-mentioned object is to provide a pile driving hammer equipped with a pile driving machine with an antenna for receiving positioning information transmitted from an artificial satellite when locating a driving point during pile driving. This is achieved by computing the information received from the antenna with a computer, confirming the obtained position coordinates on the display, and installing the pile at a position that matches the design coordinate values.

[0018]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention will be described in detail below with reference to the drawings.

FIG. 1 is a system configuration diagram showing an embodiment of the present invention.

A cap 15 for protecting the pile head during setting is set on the head portion of the pile driving hammer 3 for driving the pile 1, and the positioning information 4 from the artificial satellite 4 is attached to the cap 15. Is installed and is suspended by the base machine 2 together with a reader 16 for guiding the pile driving hammer 3. The positioning information 4 received by the antenna 5 is input to the computer 7 installed in the base machine 2 via the receiver 6. The computer 7 analyzes the program for converting the positioning information 4 from the artificial satellites into the local coordinates and the allowable bearing capacity of the pile 1 from the displacement amount when the pile 1 is placed. It has a built-in program that records data statistically. In addition to the receiver 6, the computer 7 is also provided with a keyboard 9 capable of inputting the design placing position coordinates of the pile 1 and initial conditions for analyzing the design supporting force and the allowable supporting force.
A display 8 for outputting various analysis results, observation data, design conditions, etc., a printer 10 for outputting them, and a hammer control panel 12 for controlling the operation of the pile hammer 3 are connected. The hammer control panel 12 is connected to a transmitter 11 and a generator 13 that send a control signal to the pile hammer 3. As shown in FIG. 2, the antenna 5 is fixed by a screw fixing type antenna fixing pedestal 17 welded to the cap 15.
The distance between the center of the pile 1 and the antenna 5 and the height difference between the pile head and the antenna 5 are corrected by inputting them into the computer 7 as initial conditions in advance, and the output is always converted to the position coordinate of the pile head. It is assumed that

Next, a method of determining the pile driving position will be described with reference to the flowchart of FIG.

First, before the work, the design placement position of the pile 1 is input to the computer 7 by the keyboard 9 (step 18). The pile 1 is lifted by the crane of the base machine 2 at the setting site (step 19) and moved to the vicinity of the design setting point (step 20). The antenna 5 installed on the head cap 15 of the pile driving hammer 3
The positioning data 4 from the artificial satellite is received by (step 2
1) The computer 7 receives the obtained information via the receiver 6.
Input to. Based on the input data, the computer 7 incorporating a program that converts the position coordinates measured by an artificial satellite into the local coordinates is converted into the local coordinates, and further the deviation of the positional coordinates between the antenna 5 and the pile head is corrected. (Step 22). The calculated pile head coordinates and the values of the previously entered design placement position coordinates and those plotted on the local coordinate axes are output to the display 8 (step 23), and the difference between the current position and the design position is confirmed. (Step 24). Then, based on this difference, the base machine 2 is operated, and the pile 1 is installed at the design placing point while monitoring the displacement at any time by the same method as described above (step 25).

Next, a management method during pile driving work will be described with reference to the flowchart of FIG.

First, before the work, information about the design driving position and height of the pile 1 and initial conditions such as pile diameter and pile length for analyzing the allowable bearing force from the displacement amount are input to the computer 7. (Step 26). Then, the hammer operation panel 12 is operated (step 27), the positioning data from the artificial satellite is received by the antenna 5 (step 28), and based on this, the computer 7 measures the pile head coordinates at any time and calculates the displacement amount. -Record (step 29). In addition, as for the displacement of the position and orientation of the pile 1 that occurs during driving, the values of the pile head coordinates and the design driving position coordinates and those values are plotted on the local coordinate axes, as in the above-described positioning work at the pile driving point. Confirming by outputting the thing to the display 8, if a certain amount of deviation occurs, a stop signal is sent from the computer 7 to the hammer control panel 12, and the pile driving hammer 3 is stopped via the transmitter 11, Correct the posture deviation. When the driven pile 1 approaches the design depth, the position coordinates are continuously received and calculated, and the amount of rebound of the pile 1 due to driving is measured. Then, the allowable supporting force of the pile 1 with respect to the displacement amount is calculated in advance by the computer 7
The calculation and recording are continuously performed according to the predetermined analysis program input to (step 30), and the operations from 28 to 30 are automatically repeated until the pile 1 reaches the design depth (step 31). When the pile 1 is driven to the final design depth and the design supporting force is satisfied, a stop signal is sent from the computer 7 to the hammer operation panel 12, the pile driving hammer 3 is stopped via the transmitter 11, and the pile driving work is completed. (Step 32). Then, based on the calculation results so far, various analysis results such as the pile number, the driving position, the displacement amount distribution, the final driving depth, and the allowable stress level distribution are recorded and displayed on the display 8, and as necessary. Is output by the printer 10 (step 33) and used as statistical data for the subsequent stakeout work.

According to this embodiment, the following effects can be obtained.

In the work of determining the pile installation position, since the current position is measured only by the positioning antenna installed in the pile driver, it is not necessary to add a reference point, and the number of workers, their labor, and time In addition, the piles can be installed easily and accurately without being affected by the environment of each site such as poor visibility.

Even when managing the condition of the pile during pile driving and managing the amount of displacement, it is not necessary to perform prior work such as marking on the pile for measuring the amount of displacement, and furthermore, the transit and the optical distance measuring device are not required. Rather than measuring the displacement amount of the pile from a remote location using, etc., a positioning antenna that measures the displacement amount, a computer that performs various analysis processing and recording, a hammer control panel that controls the operation of the pile hammer, etc. Since all the equipment necessary for installation work is installed at the casting site,
A series of pile driving operations can be processed only at the driving site. In addition, the actual work can be basically performed only by the crane operator, and from the measurement of pile displacement amount to the analysis of allowable bearing capacity of piles and the recording of statistics, there is almost no human factor and it is automatically performed. Moreover, it can be carried out accurately in a short period of time.

[0028]

As described above, according to the present invention, it is possible to reduce manual work and to easily and accurately perform pile driving work in a short period of time.

[Brief description of drawings]

FIG. 1 is a system configuration diagram showing an embodiment of the present invention.

FIG. 2 is a mounting view of an antenna 5 shown by reference numeral 5 in FIG.

FIG. 3 is a flowchart of a pile driving position determining operation according to an embodiment of the present invention.

FIG. 4 is a management flowchart during a pile driving operation according to an embodiment of the present invention.

[Explanation of symbols]

1 ... Pile, 2 ... Base machine, 3 ... Pile hammer, 4
... Positioning information from artificial satellites, 5 ... Antenna, 6 ... Receiver, 7 ... Computer, 8 ... Display, 9 ... Keyboard, 10 ... Printer, 11 ... Transmitter, 12 ... Hammer control panel, 13 ... Generator, 14 ... ground, 15 ... cap, 16 ... leader, 17 ... pedestal for fixing antenna.

Claims (3)

[Claims] 1. A pile driving system that requires positioning of a driving point when driving a pile, wherein a pile driving hammer provided in the pile driving machine receives positioning information transmitted from an artificial satellite. Is provided, the information received from the antenna is arithmetically processed by a computer, the obtained position coordinates are confirmed on a display, and a pile is installed at a position that matches the design coordinate value. 2. During pile driving work, position information from the antenna is continuously recorded in the computer, and deviation of the posture of the pile occurring during the driving work is confirmed / managed by the display and corrected. The pile driving system according to claim 1. 3. A pile displacement operation in the vertical direction is recorded and managed by the computer during pile driving work, and an allowable supporting force of the pile is calculated from the displacement amount by the computer, and is input to the computer in advance. The pile driving system according to claim 1 or 2, wherein the driving work is continued until the specified design supporting force is reached, and statistical progress of the amount of penetration, rebound amount and supporting force of the pile is output as a construction record.