JP6847621B2 - Construction management system - Google Patents

Description

The present invention relates to a construction management system that manages the driving construction of steel pipe piles by the rotary press-fitting method.

Ground improvement work may be carried out to reinforce the ground by placing steel pipe piles in the part where the foundation of the building will be provided. Various systems for managing the construction of such ground improvement work have been proposed. For example, in Patent Document 1 below, a system for obtaining the pile core position of a steel pipe pile by measuring the position of a prism attached to the steel pipe pile. Is disclosed.

Japanese Patent No. 5546416

By the way, especially in the initial stage of construction, since the distance between the upper end of the steel pipe pile and the ground is large, the position of the pile core at the upper end and the position of the pile core near the ground do not match. is there. In this way, in order to know whether the steel pipe pile has penetrated into the ground in the correct state, it is important to grasp the position of the pile core near the ground of the steel pipe pile.

However, in the above-mentioned conventional technique, since the prism is attached to the steel pipe pile itself, the prism has to be provided at the upper end of the steel pipe pile. Therefore, in the above-mentioned conventional technique, it is not possible to measure the pile core position of the steel pipe pile near the ground.

The present invention has been made in view of the above problems, and an object of the present invention is to provide a construction management system capable of obtaining a pile core position of a steel pipe pile in the vicinity of the ground.

According to the construction management system according to the present invention, the subject is to hold the upper end portion of the steel pipe pile, hold the drive unit that press-fits the steel pipe pile into the ground while rotating the steel pipe pile, and hold the steel pipe pile in the vicinity of the ground. A construction management system that manages the driving work of the steel pipe pile by a pile driver provided with a steady rest member, the first rail provided on the steady rest member and orbiting the steel pipe pile, and the first rail. a rail member in which the second rail is formed respectively in the above the first rail, inquiries by the steel pipe pile and magnetic force, in accordance with the rotation of the steel pipe pile, the first to slide along the first rail A second sliding body that attracts the sliding body and the first sliding body by magnetic force, follows the first sliding body, and slides along the second rail, and the second sliding body. Based on the attached first object, the measuring instrument for measuring the position of the first object, and the plurality of positions of the first object measured by the measuring instrument, the steel pipe pile The sliding range of the second sliding body is regulated by fixing the calculation unit for calculating the pile core position to the second rail at a predetermined interval and sandwiching the second sliding body between them. The first regulating member and the second regulating member are connected to the second sliding body and the first regulating member so that the second sliding body is positioned in the vicinity of the first regulating member. The second sliding body is provided with a connecting member having a restoring force, and the second sliding body follows the first sliding body until it reaches the second regulating member in the sliding range. After sliding along the second rail from the regulating member side toward the second regulating member side and reaching the second regulating member, the restoring force of the connecting member causes the first regulating member. The first sliding body is solved by continuing to slide along the first rail.
Further, the subject is a pile driver including a drive unit that holds the upper end portion of the steel pipe pile and press-fits the steel pipe pile into the ground while rotating the steel pipe pile, and a steady rest member that holds the steel pipe pile in the vicinity of the ground. It is a construction management system that manages the driving work of the steel pipe pile by the above, and is attracted by the magnetic force to the rail member provided on the steady rest member and formed by the rail that orbits the steel pipe pile. A measuring instrument that measures the positions of a sliding body that slides along the rail, a first object attached to the sliding body, and the first object that follows the rotation of the steel pipe pile. A calculation unit that calculates the pile core position of the steel pipe pile based on a plurality of positions of the first object measured by the measuring instrument, and a drive unit that is attached so as to surround the drive unit. An annular body that rotates with the annulus and a second object fixed to the annular body are provided, and the first object and the second object are symmetrical with respect to the pile core of the steel pipe pile. The measuring instrument is arranged, and the measuring instrument measures the position of the first object and the second object that are not hidden by the steel pipe pile, and the calculation unit is a plurality of the first objects. The pile core position of the steel pipe pile in the vicinity of the ground is calculated based on the position of, and the pile core position of the steel pipe pile at the upper end is calculated based on the plurality of positions of the second object. It is also solved by this.

According to the construction management system according to the present invention, the pile core position of the steel pipe pile in the vicinity of the ground can be obtained.

It is a figure which shows the structure of the construction management system which concerns on 1st Embodiment. It is an enlarged view of the vicinity of the position measurement jig. FIG. 3 is a sectional view taken along line III-III of FIG. It is a top view for demonstrating the movement of a prism. It is a top view for demonstrating the movement of a prism. It is a top view for demonstrating the movement of a prism. It is a top view for demonstrating the movement of a prism. It is a top view for demonstrating the movement of a prism. It is a figure which shows the structure of the operator terminal. It is a figure explaining an example of the calculation method of the pile core position of a steel pipe pile. It is a figure which shows the structure of the construction management system which concerns on 2nd Embodiment. It is an enlarged view of the vicinity of a drive part. It is a top view for demonstrating the movement of the 1st prism and the 2nd prism. It is a cross-sectional view of XIV-XIV of FIG.

Hereinafter, a construction management system according to an embodiment of the present invention (hereinafter, the present embodiment) will be described with reference to FIGS. 1 to 14.
The construction management system 1 according to the present embodiment is a system capable of acquiring the pile core position of the steel pipe pile being driven while the steel pipe pile is being driven by the rotary press-fitting method.

[First Embodiment]
First, the construction management system 1 according to the first embodiment of the present invention will be described with reference to FIGS. 1 to 10.
As shown in FIG. 1, the pile driver holds the upper end of the steel pipe pile P and press-fits the steel pipe pile P into the ground while rotating the drive unit 6 and the vicinity of the ground (for example, a predetermined height from the ground). A steady rest member 4 for holding the steel pipe pile P is provided.

As shown in FIG. 1, the construction management system 1 includes a position measurement jig 10 provided on the steady rest member 4 and a prism 5 (an example of an object) provided in the position measurement jig 10. A measuring instrument 2 for measuring the position and an operator terminal 3 for calculating the position of the core of the steel pipe pile P based on the measurement result by the measuring instrument 2 are provided.

Hereinafter, the configuration of the position measurement jig 10 will be described with reference to FIGS. 2 and 3.
As shown in FIGS. 2 and 3, the position measuring jig 10 includes a rail member 20 mounted on the steady rest member 4.
The rail member 20 and the steel pipe pile P are configured to maintain a constant distance by a spacer 17.

Further, as shown in FIGS. 2 and 3, the rail member 20 is formed with a first rail 20A and a second rail 20B that orbit the steel pipe pile P.

The first rail 20A is an annular rail formed so that the cross section is substantially L-shaped from the inner side surface to the central portion of the rail member 20. A first magnet 15A (an example of a first sliding body) is provided on the first rail 20A so that the first magnet 15A can slide on the first rail 20A.

The first magnet 15A is a permanent magnet, and the tip portion protruding from the first rail 20A toward the steel pipe pile P side is in contact with the side surface of the drive unit 6. As a result, the first magnet 15A slides along the first rail 20A following the rotation of the steel pipe pile P.
In the present embodiment, the steel pipe pile P is rotated clockwise in FIG. 2, and in that case, the first magnet 15A also rotates clockwise along the first rail 20A.

The second rail 20B is an annular rail formed as a recess on the upper surface of the rail member 20. Then, as shown in FIG. 2, the second rail 20B is provided with the first regulation member 11 and the second regulation member 12, and the first regulation member 11 and the second regulation member 12 are separated from each other. Two magnets 15B (an example of a second sliding body) are arranged. The second magnet 15B and the first regulating member 11 are connected by an elastic member 13 (an example of a connecting member) such as a spring.

The second magnet 15B is a permanent magnet, and a prism 5 is attached to the upper portion of the second magnet 15B.
The second magnet 15B and the first magnet 15A are arranged so that different magnetic poles face each other. That is, the first magnet 15A and the second magnet 15B are arranged so as to attract each other. Therefore, when the first magnet 15A passes below the second magnet 15B, the first magnet 15A attracts the second magnet 15B, so that the second magnet 15B follows the first magnet 15A and follows the second rail. It slides along 20B.

Here, the movement of the prism 5 attached to the second magnet 15B will be described with reference to FIGS. 4 to 8. In the following, since the prism 5 is attached to the second magnet 15B, the second magnet 15B and the prism 5 move in the same manner.

4 to 8 correspond to a view of the position measuring jig 10 as viewed from above. Here, in the second rail 20B, the range separated by the first regulating member 11 and the second regulating member 12 and in which the second magnet 15B is provided is defined as the sliding range of the second magnet 15B. To do.
The sliding range faces the measuring instrument 2, and when the prism 5 is in the sliding range, the measuring instrument 2 can always track the prism 5.

The first magnet 15A moves along the first rail 20A at the same rotation speed as the steel pipe pile P as the steel pipe pile P rotates. Here, it is assumed that the direction of rotation of the first magnet 15A is clockwise.

In the state shown in FIG. 4, it is assumed that the elastic member 13 is compressed to the minimum length, and in this case, the second magnet 15B is stopped in the vicinity of the first regulating member 11.
Here, the first magnet 15A approaches the second magnet 15B from behind the first regulating member 11 and reaches the first magnet 15A below the second magnet 15B, as shown in FIG. Then, as shown in FIG. 6, the second magnet 15B is attracted to the first magnet 15A and follows the first magnet 15A to slide the second rail 20B clockwise.

Next, as shown in FIG. 7, the second magnet 15B slides along the second rail 20B, and when it reaches the second regulating member 12, the second regulating member 12 restricts the movement beyond that. Will be done. On the other hand, since the first magnet 15A continues the orbiting motion along the first rail 20A, the distance between the first magnet 15A and the second magnet 15B is increased, and the attractive force between the two is weakened. Then, as shown in FIG. 8, the elastic member 13 connecting the second magnet 15B and the first regulating member 11 tries to be restored from the stretched state. As a result, the second magnet 15B is pulled back to the side of the first regulating member 11, and as a result, the second magnet 15B returns to the state shown in FIG.
The above cycle is repeated every time the first magnet 15A goes around the first rail 20A.

The measuring instrument 2 irradiates a region including the sliding range of the second magnet 15B with a light wave, and determines the position coordinates (three-dimensional coordinates) of the prism 5 based on the reflected light from the prism 5 attached to the second magnet 15B. measure. The measuring instrument 2 repeatedly executes the measurement of the position coordinates of the prism 5 at predetermined time intervals.
According to the construction management system 1 according to the first embodiment, the prism 5 reciprocates in the sliding range between the first regulating member 11 and the second regulating member 12 and is not hidden by the steel pipe pile P. Therefore, the measuring instrument 2 can constantly measure the position of the prism 5.
Then, the measuring instrument 2 sequentially transmits the measured position of the prism 5 to the operator terminal 3 which is communicably connected.

The operator terminal 3 is a computer operated by the operator of the pile driver. The operator terminal 3 may be a mobile terminal such as a smartphone or a tablet terminal, or may be an operation terminal provided in a pile driver.

As shown in FIG. 9, the operator terminal 3 includes a calculation unit 3A, a storage unit 3B, a communication unit 3C, and an output unit 3D.

The calculation unit 3A is realized by, for example, a CPU (Central Processing Unit), and executes numerical calculation, information processing, and device control.
In the present embodiment, the calculation unit 3A calculates the pile core position of the steel pipe pile P based on the position information (coordinate information) of the prism 5 acquired from the measuring instrument 2.
Hereinafter, an example of the calculation process of the pile core position of the steel pipe pile P executed by the calculation unit 3A will be described with reference to FIG.

As shown in FIG. 10, it is assumed that the position coordinates of the prism 5 measured by the measuring instrument 2 are two points, X1 and X2. In this case, the calculation unit 3A is an intersection (A, B) of a circle centered on the coordinate position X1 and having a radius at a predetermined distance R and a circle centered on the coordinate position X2 and having a radius R. ) Coordinate position is calculated.
Next, the calculation unit 3A obtains the intersection (A) on the side farther from the measuring instrument 2 from the calculated coordinate positions as the pile core position.
The distance R is the total value of the radius of the steel pipe pile P (distance from the center to the outer circumference), the width of the spacer 17, and the distance from the inner peripheral surface of the rail member 20 to the center of the second rail 20B. This distance R is a fixed value and may be stored in the storage unit 3B in advance.

The method of calculating the pile core position of the steel pipe pile P by the calculation unit 3A is not limited to the above example. For example, when the coordinate positions of the prism 5 are measured at three or more points, the center position of the circumscribed circle of the triangle connecting the coordinate positions of the three points may be obtained as the pile core position of the steel pipe pile P.

Further, the calculation unit 3A calculates the amount of deviation (coordinate difference) between the target value of the pile core position of the steel pipe pile P and the calculated pile core position. The target value of the pile core position of the steel pipe pile P may be data input by the operator to the operator terminal 3 before the start of driving the steel pipe pile P.

The storage unit 3B is realized by, for example, a semiconductor memory, a magnetic disk device, or the like, stores data and programs, and is also used as a work memory of the calculation unit 3A.
In the present embodiment, the storage unit 3B stores in advance the target value of the pile core position of the steel pipe pile P, the value of the above distance R, and the like, as well as the coordinate position of the prism 5 measured by the measuring instrument 2. Information on the pile core position of the steel pipe pile P calculated by the calculation unit 3A may be stored.

The communication unit 3C is realized by, for example, a communication interface that executes wireless communication and wired communication, and performs data communication with an external device such as a measuring instrument 2.
In the present embodiment, the communication unit 3C performs data communication with the measuring instrument 2 and acquires the information of the coordinate position of the prism 5 measured by the measuring instrument 2 from the measuring instrument 2.

The output unit 3D displays, for example, the amount of deviation (coordinate difference) between the target value of the pile core position of the steel pipe pile P calculated by the calculation unit 3A and the calculated pile core position, which is realized by a display device. Display and output to the device.

According to the construction management system 1 described above, the position of the core of the steel pipe pile P at the position of the steady rest member 4 near the ground can be obtained. This makes it possible to confirm that there is no problem with the position of the core of the steel pipe pile P near the ground.

Further, according to the construction management system 1, the prism 5 moving around the steel pipe pile P can be reciprocated within the area that can be measured by the measuring instrument 2.
As a result, the measuring instrument 2 can constantly measure the position of the prism 5. That is, according to the construction management system 1, the pile core position of the steel pipe pile P can be constantly grasped.

Further, according to the construction management system 1, by providing the spacer 17 between the steel pipe pile P and the rail member 20, the distance between the steel pipe pile P and the prism 5 can be kept constant. As a result, the pile core position of the steel pipe pile P can be accurately obtained from the position of the prism 5 measured by the measuring instrument 2.

Further, according to the construction management system 1, the construction of the steel pipe pile P is planned by outputting the deviation amount between the pile core position of the steel pipe pile P under construction and the target value to the output unit 3D of the operator terminal 3. You can check if it is done on the street.

[Second Embodiment]
Next, the construction management system 1A according to the second embodiment of the present invention will be described with reference to FIGS. 11 to 14.
In the construction management system 1A according to the second embodiment, the first prism 5A (an example of the first object) and the second prism 5B (the second object) are located in the vicinity of the steady rest member 4 and the drive unit 6, respectively. It differs from the construction management system 1 according to the first embodiment in that an example of an object) is provided and the positions of both can be measured. The pile driver has the same configuration.

As shown in FIG. 11, the construction management system 1A includes a position measurement jig 10A provided on the steady rest member 4, an annular body 30 attached to the drive unit 6, and a position measurement jig 10A. A measuring instrument 2 that measures the positions of the first prism 5A and the second prism 5B attached to the annular body 30 provided in the above, and an operator terminal that calculates the position of the core of the steel pipe pile P based on the measurement result by the measuring instrument 2. 3 is provided.
In the second embodiment, the angle of the measuring instrument 2 is adjusted so that both the first prism 5A and the second prism 5B can measure the angle.

First, the mounting structure of the second prism 5B will be described with reference to FIG. FIG. 12 shows an enlarged view of the vicinity of the drive unit 6.
As shown in FIG. 12, the annular body 30 is arranged so as to surround the drive unit 6, and the annular body 30 and the drive unit 6 are fixed by a fixture 31 penetrating the annular body 30. As a result, as the drive unit 6 rotates, the annular body 30 also rotates.
Here, the second prism 5B is fixed to the upper surface of the annular body 30. As a result, the second prism 5B rotates around the drive unit 6 as the drive unit 6 rotates.

Next, the configuration of the position measurement jig 10A will be described with reference to FIGS. 13 and 14.
As shown in FIGS. 13 and 14, the position measuring jig 10A includes a rail member 21 mounted on the steady rest member 4.
The rail member 21 and the steel pipe pile P are configured to maintain a constant distance by a spacer 17.

Further, the rail member 21 is formed with a rail 21A that orbits the steel pipe pile P.
The rail 21A is an annular rail formed so that the cross section is substantially U-shaped from the inner side surface to the inside of the rail member 20. A magnet 16 is provided on the rail 21A so that the magnet 16 can slide.

The magnet 16 is a permanent magnet, and the tip portion protruding from the rail 21A toward the steel pipe pile P side is attracted to the side surface of the drive unit 6 by a magnetic force. Therefore, the magnet 16 follows the rotation of the steel pipe pile P and slides along the rail 21A.
In the present embodiment, the steel pipe pile P is rotated clockwise in FIG. 13, and in that case, the magnet 16 is also rotated clockwise along the rail 21A.

Here, as shown in FIGS. 13 and 14, the first prism 5A and the second prism 5B are arranged symmetrically with respect to the pile core of the steel pipe pile P.
By arranging the first prism 5A and the second prism 5B in this way, the measuring instrument 2 can alternately capture the positions of the first prism 5A and the second prism 5B.
That is, the measuring instrument 2 measures the positions of the first prism 5A and the second prism 5B by measuring the positions of the first prism 5A and the second prism 5B that are located on the front side of the steel pipe pile P. can do.

The measuring instrument 2 transmits the measured position coordinates of the first prism 5A and the second prism 5B to the operator terminal 3.
The calculation unit 3A of the operator terminal 3 calculates the pile core position of the steel pipe pile P in the vicinity of the steady rest member 4 based on the position coordinates of a plurality of points of the first prism 5A received from the measuring instrument 2.
Similarly, the calculation unit 3A of the operator terminal 3 calculates the pile core position of the steel pipe pile P in the vicinity of the drive unit 6 based on the position coordinates of a plurality of points of the second prism 5B received from the measuring instrument 2.
The calculation unit 3A of the operator terminal 3 may identify the position coordinates of the first prism 5A and the second prism 5B based on the coordinate values in the respective height directions.

The calculation unit 3A of the operator terminal 3 may calculate the amount of penetration of the steel pipe pile P into the ground based on the pile core position of the steel pipe pile P in the vicinity of the drive unit 6 calculated above. For example, the calculation unit 3A of the operator terminal 3 may obtain the downward change amount of the pile core position of the steel pipe pile P calculated based on the second prism 5B as the penetration amount of the steel pipe pile P.

Further, the calculation unit 3A of the operator terminal 3 determines the inclination of the steel pipe pile P based on the pile core position of the steel pipe pile P in the vicinity of the steady rest member 4 and the pile core position of the steel pipe pile P in the vicinity of the drive unit 6. It may be calculated. Then, the output unit 3D of the operator terminal 3 may output the inclination of the steel pipe pile P calculated above.

According to the construction management system 1A described above, the pile core positions of the upper and lower parts of the steel pipe pile P can be obtained. As a result, the angle of the steel pipe pile P can be grasped.
Further, according to the construction management system 1A, the amount of penetration of the steel pipe pile P into the ground can be obtained from the amount of change in the height of the pile core position of the second prism 5B.

[Additional Notes]
Typical embodiments of the present invention are as follows.

In the construction management system according to the present invention, a drive unit that holds the upper end portion of the steel pipe pile and press-fits the steel pipe pile into the ground while rotating the steel pipe pile, and a steady rest member that holds the steel pipe pile in the vicinity of the ground. A construction management system that manages the driving work of the steel pipe pile by a pile driver provided, and is a rail member provided on the steady rest member and formed with a rail that orbits the steel pipe pile, and the steel pipe pile. A sliding body that slides along the rail, a first object attached to the sliding body, a measuring instrument that measures the position of the first object, and the measuring instrument. It is characterized by including a calculation unit for calculating the pile core position of the steel pipe pile based on a plurality of measured positions of the first object.
According to the above construction management system, it is possible to obtain the pile core position of the steel pipe pile in the vicinity of the ground. This makes it possible to confirm whether the steel pipe pile has penetrated into the ground in the correct state.

In the above construction management system, the rail member has a first rail and a second rail, and a first slide that slides along the first rail following the rotation of the steel pipe pile. A moving body, a second sliding body that follows the first sliding body and slides along the second rail, and a sliding range of the second sliding body provided on the second rail. The first target is provided with a first regulating member and a second regulating member, a connecting member that connects the second sliding body and the first regulating member and has a restoring force, and has a restoring force. The object is attached to the second sliding body, and the second sliding body follows the second sliding body until it reaches the second regulating member in the sliding range. After sliding along the rail of the above and reaching the second restricting member, it may be pulled back to the vicinity of the first regulating member by the restoring force of the connecting member.
By doing so, the object moving around the steel pipe pile can be reciprocated within a predetermined range without orbiting the steel pipe pile.

In the construction management system, the first sliding body and the second sliding body are both magnets, and the first sliding body attracts the steel pipe pile and follows the first sliding body. It slides along the first rail, and the second sliding body attracts the first sliding body and slides along the second rail following the second sliding body. Good as a matter of fact.
By doing so, with a simple configuration, an object moving around the steel pipe pile can be reciprocated within a predetermined range without orbiting the steel pipe pile.

In the above construction management system, the connecting member may be an elastic member.
By doing so, the second sliding body can be pulled back to the vicinity of the first regulating member by a simple configuration.

In the above construction management system, the measuring instrument may be arranged so as to face the sliding range.
By doing so, the measuring instrument can constantly measure the position of the object. As a result, the position of the pile core of the steel pipe pile can be constantly grasped.

In the above construction management system, the first object is provided with an annular body that is attached so as to surround the drive unit and rotates together with the drive unit, and a second object fixed to the annular body. And the second object are arranged symmetrically with respect to the steel pipe pile, and the measuring instrument is located at a position of the first object and the second object which is not hidden by the steel pipe pile. Is measured, and the calculation unit calculates the pile core position of the steel pipe pile in the vicinity of the ground based on the plurality of positions of the first object, and at the plurality of positions of the second object. Based on this, the pile core position of the steel pipe pile at the upper end may be calculated.
By doing so, the pile core positions of the upper and lower parts of the steel pipe pile can be obtained. As a result, the penetration angle of the steel pipe pile can be grasped.
Further, the amount of penetration of the steel pipe pile into the ground can be obtained from the position of the pile core at the upper end.

In the above construction management system, a spacer provided between the steel pipe pile and the rail member and keeping the positions of the rail member and the steel pipe pile constant may be provided.
By doing so, the pile core position of the steel pipe pile can be accurately obtained from the position of the object.

In the above construction management system, an output unit that outputs the amount of deviation between the pile core position of the steel pipe pile and the target value calculated by the calculation unit may be provided.
By doing so, it is possible to confirm whether or not the construction of the steel pipe piles is carried out as planned.

In the above construction management system, the first object may be a prism.
By doing so, the position of the first object can be measured with high accuracy.

In the above construction management system, the second object may be a prism.
By doing so, the position of the second object can be measured with high accuracy.

P Steel pipe pile 1 Construction management system 1A Construction management system 2 Measuring instrument 3 Operator terminal 3A Calculation unit 3B Storage unit 3C Communication unit 3D Output unit 4 Steering member 5 Prism 5A 1st prism 5B 2nd prism 6 Drive unit 10 For position measurement Jig 10A Position measurement jig 11 1st regulation member 12 2nd regulation member 13 Elastic member 15A 1st magnet 15B 2nd magnet 16 Magnet 17 Spacer 20 Rail member 20A 1st rail 20B 2nd rail 21 Rail member 21A Rail 30 Ring 31 Fixture

Claims (9)

The steel pipe pile by a pile driver including a drive unit that holds the upper end portion of the steel pipe pile and press-fits the steel pipe pile into the ground while rotating the steel pipe pile, and a steady rest member that holds the steel pipe pile in the vicinity of the ground. It is a construction management system that manages casting construction.
A rail member provided on the steady rest member and formed with a first rail that goes around the steel pipe pile and a second rail that is above the first rail, respectively .
A first sliding body that attracts the steel pipe pile by magnetic force , follows the rotation of the steel pipe pile, and slides along the first rail.
A second sliding body that is attracted by a magnetic force to the first sliding body, follows the first sliding body, and slides along the second rail.
The first object attached to the second sliding body and
A measuring instrument that measures the position of the first object, and
A calculation unit that calculates the pile core position of the steel pipe pile based on a plurality of positions of the first object measured by the measuring instrument.
A first regulating member and a second regulation that regulate the sliding range of the second sliding body by being fixed to the second rail at a predetermined interval and sandwiching the second sliding body in between. Members and
A connecting member that connects the second sliding body and the first regulating member and has a restoring force so as to position the second sliding body in the vicinity of the first regulating member is provided.
The second sliding body follows the first sliding body from the first regulating member side to the second regulating member side until it reaches the second regulating member in the sliding range. After sliding along the second rail toward the second rail and reaching the second regulating member, the first sliding body is pulled back to the vicinity of the first regulating member by the restoring force of the connecting member. Is a construction management system characterized in that it continues to slide along the first rail. Construction management system of claim 1 wherein the first sliding body and the second sliding body is characterized in that both Ru magnet der. The construction management system according to claim 1 or 2 , wherein the connecting member is an elastic member. The construction management system according to any one of claims 1 to 3 , wherein the measuring instrument is arranged at a fixed point of a construction yard and is arranged so as to face the sliding range. The steel pipe pile by a pile driver including a drive unit that holds the upper end portion of the steel pipe pile and press-fits the steel pipe pile into the ground while rotating the steel pipe pile, and a steady rest member that holds the steel pipe pile in the vicinity of the ground. A construction management system that manages casting construction
A rail member provided on the steady rest member and formed with a rail that orbits the steel pipe pile, and a rail member.
A sliding body that attracts the steel pipe pile by magnetic force and slides along the rail following the rotation of the steel pipe pile.
The first object attached to the sliding body and
A measuring instrument that measures the position of the first object, and
A calculation unit that calculates the pile core position of the steel pipe pile based on a plurality of positions of the first object measured by the measuring instrument.
An annular body that is attached so as to surround the drive unit and rotates together with the drive unit.
A second object fixed to the ring is provided.
The first object and the second object are arranged symmetrically with respect to the pile core of the steel pipe pile.
The measuring instrument measures the position of the first object and the second object that are not hidden by the steel pipe pile.
The calculation unit
Based on the plurality of positions of the first object, the pile core positions of the steel pipe piles in the vicinity of the ground are calculated.
A construction management system characterized in that the pile core position of the steel pipe pile at the upper end is calculated based on a plurality of positions of the second object. The construction management system according to any one of claims 1 to 5 , further comprising a spacer provided between the steel pipe pile and the rail member and keeping the position of the rail member and the steel pipe pile constant. The construction management system according to any one of claims 1 to 6 , further comprising an output unit that outputs a deviation amount between the pile core position of the steel pipe pile and the target value calculated by the calculation unit. The construction management system according to any one of claims 1 to 7 , wherein the first object is a prism. The construction management system according to claim 5 , wherein the second object is a prism.

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