JP2011144593A - Construction management system for soil improving machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a construction management system for a soil improving machine constantly measuring the vertical position of a vehicle body to allow easy confirmation of the vertical position of a construction machine due to a rugged inclination in a site and to surely eliminate a false display of pile length due to the lift in front of the construction machine in a final base plate stage. <P>SOLUTION: A rotary laser level meter 18 is installed in the site, and a light receiving plate 19 based on light receiving elements is suspended from the soil improving machine 17 to be constantly vertical. Laser beams from the rotary laser level meter 18 are detected by the light receiving elements of the light receiving plate 19, and the output of the light receiving elements is sent to a microcomputer to measure the extent of moving-up and -down of the vehicle body of the soil improving machine from a reference point. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  More particularly, the present invention relates to a ground improvement machine that injects a ground improvement agent into a hole excavated from a swivel device through a drilling rod. It is about the construction management system of the ground improvement machine which can always be grasped from.

  There are various types of ground improvement machines. As an example, as shown in FIG. 7, as shown in FIG. 7, the lower end is pivotally supported by a swing frame 2 provided on the base machine 1 with a tilting cylinder 3 provided on the base machine 1. The leader guide 6 is supported in a tiltable manner, and the leader 8 is erected so that the leader 8 can be moved up and down with the upper and lower cylinders 7 interposed therebetween.

  Then, the swivel device 15 is provided along the leader 8 so as to be movable up and down, and the hollow excavation rod 5 is engaged with the rotary driving device 4 provided at the lower portion so as to be movable up and down so as to rotate and move up and down. In the figure, 9a is an upper part of the feed device for raising and lowering the swivel device 15, and 9b is a lower part of the feed device.

  At the lower end of the hollow excavation rod 5, an excavation head 12 having a lower end excavation blade 11 provided with excavation claws 10 is provided, on which a stirring blade 16 is attached.

  In the figure, 13 is an outrigger, 14a is a counterweight, and 14b is a cleaning device.

  As described in the following patent document, the swivel device 15 moves up and down along the reader 8, and the swivel device 15 is connected to the excavation rod 5.

The drive device 4 rotates the hollow excavation rod 5 and performs excavation work with the excavation head 12 at the lower end of the excavation rod 5, and the ground improver fed by pressure from the batcher plant via the injection hose is supplied to the upper end of the excavation rod 5. It is injected into the excavation rod 5 from the swivel device 15 provided in the excavation head 15 and stirred while injecting the ground improver into the hole excavated from the tip of the excavation head 12 to harden the ground improver and to improve the ground.
JP 2009-203659 A

Although it is not a ground improvement machine as described above, it is a ground improvement machine configured with a construction machine as a base machine, and a head casing attached to the tip of a boom of the base machine, and can be raised and lowered to the head casing. An agitation and mixing head that is supported by the guide and is driven up and down by an elevating drive mechanism so as to penetrate into the ground, and in which an agitating blade mounted on an endless chain is driven to circulate vertically. The following patent document describes a penetration depth management means for managing the penetration depth of the stirring and mixing head based on the displacement data of the boom and the lifting and lowering stroke data of the stirring and mixing head with respect to the head casing. ing.
JP 2004-225368 A

  Specifically, this Patent Document 2 includes a boom angle detection unit that detects the angle of the boom, and a stroke detection unit that detects a lifting and lowering stroke of the stirring and mixing head with respect to the head casing. The penetration depth of the stirring and mixing head is calculated and calculated based on the detection outputs of the boom angle detection means and the stroke detection means, and the calculated penetration depth is displayed on the display means.

  According to Patent Literature 2, the penetration depth can be quantitatively managed by the penetration depth management means.

  In the ground improvement machine as described above, which is used for a ground floor, the zero point position “reference point” of the current pile length is set appropriately and arbitrarily.

  Furthermore, the GL ground height in the site is often improved before the embankment, which is unqualified.

  In addition, even during improvement work, a pile length display of an imaginary “lie” occurs when the vehicle body is floating on the bottom of the pile. These errors should not be in the ground improvement work, and will cause uneven settlement at a later date, so a consistent ground improvement construction method based on the survey data and the improved design guidelines is required. I came.

  In addition, the thing of the said patent document 2 is a base machine which has a boom, and a penetration depth management means manages the penetration depth of a stirring mixing head based on the displacement data of a boom and the raising / lowering stroke data of the stirring mixing head with respect to a head casing. Therefore, it is not suitable for the case where the hollow excavation rod is rotated by the rotary driving device provided so as to be movable up and down along the leader as described above and excavation work is performed by the excavation head at the lower end of the excavation rod.

  The object of the present invention is to eliminate the above inconvenience and to always measure the vertical position of the vehicle body, so that the vertical position of the construction machine due to the uneven slope in the site can also be easily confirmed, and the pile length due to the float before the construction machine at the final bottom The object of the present invention is to provide a construction management system for a ground improvement machine that can reliably eliminate lie display.

  In order to achieve the above object, the present invention as set forth in claim 1 has a rotary laser level meter installed in the premises, and the ground improvement machine hangs the light receiving plate by the light receiving element so that it is always vertical, and the light receiving plate receives light. The gist is to detect the laser beam from the rotary laser level meter with the element, send the output of the light receiving element to the microcomputer, and measure how much the ground improvement machine body is moving up and down from the reference point.

  According to the first aspect of the present invention, when the laser beam from the rotary laser level meter hits the light receiving element of the light receiving board, the voltage ratio of the light receiving element changes, and the microcomputer detects that, and the light receiving position is determined. Check. Thereby, the position in the height direction of the machine can always be grasped from the site reference point by the ground improvement machine.

  The survey data is measured based on the BM “Benchmark”, and as described above, the ground improvement machine can always grasp the position in the height direction of the machine from the site reference point, so construction on the BM standard becomes possible. .

  In addition, if the BM standard depth display is always possible in the construction machine operating room, the vertical position of the construction machine due to uneven slope in the site can be easily confirmed on the display of the management device, and at the time of the final bottom Pile length lie display due to lifting in front of the construction machine is also eliminated.

  In addition, since the position of the lower end of the agitator bit is always displayed on the construction management device, the pile head height can be shaped into a soft, sludge-like pile, so the pile height, specified cylinder diameter, and pile core position Can be easily corrected.

  The gist of the present invention described in claim 2 is that a plurality of light receiving elements are arranged vertically, managed by a microcomputer for each light receiving element, and grasping which position the light receiving element is hit by the laser. .

  According to the second aspect of the present invention, the light receiving element is usually only 24 mm, and by arranging a plurality of the light receiving elements vertically, a span of 0 to 500 mm can be obtained. In addition, in such an arrangement, it is not possible to simply confirm which light receiving element is hit by the laser, so it is managed by a microcomputer for each light receiving element and it is possible to grasp which position the light receiving element is hit by the laser. Can do.

  According to the third aspect of the present invention, the microcomputer receiving the output of the light receiving element outputs a serial signal to the construction management device installed in the driver's seat of the ground improvement machine, and the construction management device indicates the height change of the ground improvement machine. The gist is to display the corrected position of the lower end of the stirring bit, the bottom depth of the lower portion of the display pile, and the height of the upper portion of the pile head.

  According to the third aspect of the present invention, the ground improvement data can be improved with high reliability by accurately confirming the consistency between the ground survey data, the foundation design, and the construction data.

  As described above, the construction management system for the ground improvement machine according to the present invention can always measure the vertical position of the vehicle body so that the vertical position of the construction machine due to uneven slope in the site can be easily confirmed, and the construction machine at the time of the final bottom The pile length lie display due to the previous lifting can be surely eliminated.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 is a side view showing an embodiment of the construction management system for a ground improvement machine according to the present invention, FIG. 2 is a side view showing an excavation in the same way, 17 in the figure is a ground improvement machine for a ground, and 18 is this ground It is a rotary laser level meter installed in the site constructed by the improved machine 17.

  As shown in FIG. 7, the ground improvement machine 17 is a raising / lowering cylinder 3 provided in the base machine 1, and supports the leader guide 6 pivotally supported by the swing frame 2 on the base machine 1 side in a tiltable manner, and The reader guide 6 is erected so that the reader 8 can move up and down with the upper and lower cylinders interposed.

  A swivel device 15 is provided along the leader 8 so as to be movable up and down, and a rotary drive device 4 is provided below the leader 8 so as to be movable up and down. A hollow excavation rod 5 is engaged with the rotary drive device 4 so as to be rotatable and vertically movable. Let At the lower end of the hollow excavation rod 5, an excavation head 12 having a lower end excavation blade 11 provided with excavation claws 10 is provided, and a stirring blade 16 is attached thereon.

  FIG. 6 shows the details of the excavation head 12, a triangular vertical plate-like pile core set plate 25 is projected at the tip of the rotating shaft, and a milk discharge port 26 is formed on the pile core set plate 25. It extends from the position of the milk discharge port 26 to the left and right.

  On the excavation blade 11 provided with the excavation claw 10, the anti-rotation blade 27 is provided free on the rotating shaft.

  As shown in FIG. 2, a hollow excavation rod 5 is rotated by a rotary driving device 4 provided so as to be movable up and down along a leader 8, and excavation work is performed by an excavation head 12 at the lower end of the excavation rod 5. From the swivel device 15 provided at the upper end of the excavation rod 5, the ground improvement agent pumped through the injection hose is injected into the excavation rod 5, and the ground improvement agent is injected into the hole excavated from the tip of the excavation head 12. Stir and harden the ground improver to improve the ground.

  The rotary drive device 4 has a chuck mechanism for the excavation rod 5 inside, and can hold the excavation rod 5 up and down. When the improvement length is long, the rod is lengthened to increase the improvement length.

  The rotary laser level meter 18 installed in the site rotates the laser beam A from the laser emitting unit built in the main body 18a around the vertical line, and forms an index point or a horizontal reference plane by the laser beam A. Is.

  The laser A light emitted from the rotary laser level meter 18 includes invisible laser light and visible laser light. When visible laser light is used, there is an advantage that the laser light can be visually confirmed. In the figure, 18b is a tripod.

  In this way, the rotary laser level meter 18 was installed in the site, and a vertically long light receiving plate 19 by the light receiving element 20 was suspended from the ground improvement machine 17 so as to be always vertical.

  The light receiving element 20 is a semiconductor position detection element (PSD: Position Sensitive Detector) and is a spot light position sensor. Basically, it has a PIN structure having one junction surface like a photodiode. When a spot of light is given on the semiconductor surface, charge is generated, and the generated charge reaches the electrodes at both ends. The amount of charge that has reached is inversely proportional to the distance from the position of the spot light to the electrode. By calculating the current extracted from the electrode, it can be used as data proportional to the position of the spot light.

  The light receiving element is usually only 24 mm, while the vertical span of the light receiving plate 19 for receiving the laser A from the rotary laser level meter 18 is required to be 0 to 500 mm. Therefore, as shown in FIGS. In the present invention, a plurality of light receiving elements 20 are vertically arranged to secure this necessary span.

  Each of the light receiving elements 20 is managed by the microcomputer 21 to grasp which position the light receiving element 20 is hit by the laser, but the current-voltage conversion value of each light receiving element 20 is stored in the microcomputer 21 as shown in FIG. Introduced from the AD converter of the microcomputer 21, the height position data obtained by processing by each microcomputer 21 is communicated to the construction management device 22 in a serial conforming to RS232C.

  The construction management device 22 is installed in the driver's seat of the ground improvement machine 15 and receives data input from various sensors such as an encoder, a proximity sensor, a tilt sensor, a pressure sensor, a flow meter, a height level sensor, and an inclinometer. The control unit that performs the calculation and the display unit that displays the calculation result from the control unit calculate how much the reference point is moved up and down based on the height position data, and perform correction control.

  The construction management device 22 includes the excavation depth based on the distance that the leader 8 and the excavation rod 5 are elevated, the excavation speed that is the elevation speed of the leader 8 and the excavation rod 5, the torque value of the excavation rod 5, and the pressure that is the indentation pressure. Input, rotational speed of the excavating rod 5, cumulative rotational speed of the excavating rod 5, cumulative rotational speed per m that is the total rotational speed of ascending / descending every 1 m excavation depth, flow velocity that is the speed at which cement milk flows, cement milk The integrated flow rate, which is a value obtained by counting the amount injected, and the integrated flow rate per m, which is the total flow rate of ascending / descending for each 1 m section of excavation depth, are displayed.

  Next, the usage will be described. A rotary laser level meter 18 is installed in the site, a bar-shaped light receiving plate 19 is installed in the ground improvement machine 17, and the output of the light receiving element 20 of the light receiving plate 19 is set in the driver's seat. The height position is displayed by being introduced into the construction management device 22, but the reference position is zero-corrected at the center of the light receiving panel 19.

  In the construction order, the construction order is such that the laser strikes the light receiving panel 19 at all times, and the construction machine performs construction with the rotating laser level meter facing left front.

  The zero point set of the construction management device 22 is a claw of the excavation blade 10 of the lower tip excavation blade 11 at the lower end of the hollow excavation rod 5. This claw position is set to either GL level height or BM height, and zero point correction is performed. In the figure, reference numeral 23 denotes a GL / RM group based on the GL level height.

  The laser beam A of the rotary laser level meter 18 emits horizontally, and the height of movement (the amount of increase in the vehicle body β) when the ground improvement machine 17 moves from the zero correction point to the position of the α point is the construction management in the driver's seat. It is detected by the device 22.

  Further, the auger stroke (the stroke / leader stroke of the excavation head 12 of the excavation rod 5 (the stroke of the leader 8)) and the tip position of the stirring bit are displayed. Further, it is assumed that the height position from the reference position grasped by the light receiving board 19 of the ground improvement machine 17 is corrected.

  Usually, the length of the pile is determined by the auger stroke of the ground improvement machine 17 (the stroke of the excavation head 12 of the excavation rod 5 and the stroke of the leader 8). Thus, the rotary drive device 4 has a function for changing the excavation rod 5, and if the excavation rod 5 is changed, the amount of change in the vertical position of the tip of the agitation bit cannot be measured. It becomes possible.

Therefore, together with this measurement, the displacement of the excavation rod 5 is measured and calculated in the construction management device 22. (See Figure 3)
Relative dimension of initial rod / rotary drive D
Relative displacement dimension after rod gripping E
Rod vertical displacement F = D-E

  There is a phenomenon that the rod falls when the excavation rod 5 is held. Since the depth of the tip of the stirring bit is displayed differently when it is lowered, it is measured by a displacement meter and calculated by the construction management device 22 to display the true tip depth of the stirring bit.

In order to confirm the depth from the GL ground level, first, the stack bit is adjusted so that the digging blade lower end excavation blade claw position matches the GL ground level height. At that time, it is stored in the construction management device 22. (See FIG. 4).

  After that, the construction management device 22 automatically calculates and always displays the nail position at the tip of the stirring bit.

As shown in FIG. 5, when the first pile is constructed and the vehicle is moved α during the second construction, if the entire vehicle rises by β, the laser receiver changes by γ. The amount of change is β = γ and is calculated in the construction management device 22.
From the GL ground level, the nail position at the tip of the stirring bit is displayed by the construction management device 22 as GL-.
Swivel elevation position A
Leader stroke B
Body displacement γ
Stirring bit claw position C = A + (− B) + (− γ)
When there is a gripping mechanism in the rotation drive device 4, in addition to the above, the amount of vertical displacement of the rod F is added. Stirring bit tip claw position C = (− A) + (B) + (− γ) + (− F )

  Thus, the height position of the ground improvement machine 17 main body can be grasped in the entire area of the site, and the height of the vehicle body can always be confirmed from the site reference point.

  As a result, the support depth of the improved pile is consistent with the survey data, and the optimum pile can be constructed according to the design instructions for the foundation pile.

  In addition, the pile construction depth from the reference point in the site can be determined by the construction management device 22 in the driver's seat of the ground improvement machine 17.

  The depth of the bottom base of the lower pile and the height of the upper pile head can be easily confirmed by the numerical display of the construction management device 22.

  This makes it possible to improve the ground with high reliability by confirming the consistency between the ground survey data, the foundation design, and the construction data.

  Moreover, the depth from the GL ground level is always confirmed.

  Furthermore, this makes it possible to easily construct a method that does not generate waste mud. Pile head shaping is also easy due to the viscosity of the slurry before solidification, and it becomes possible to shape a cylindrical shape with a clean and specified diameter.

  With the stirring bit forward rotation excavation agitation, the pile bottom depth is uniformly finished at all pile positions. In addition, the pile head height can be finished at an arbitrary height by reversing the stirring bit, and the shape of the pile head can be easily shaped without being solidified.

  Parallel to being able to always grasp the position of the machine height direction from the site reference point with the ground improvement machine of the present invention, the shaping of the pile head becomes easy and the pile head height level and the pile cylinder shaping can be made beautiful. .

  FIG. 10 shows an excavation head 12 used for shaping such a pile head. Excavation blades 11 are provided with excavation claws 28 for pile head processing instead of excavation claws 10. In the arrangement of the pile head processing excavation claws 28 at the tip of the stirring bit, the claws are alternately installed and the claw width is increased so that the two blade claws are flattened during shaping.

  Furthermore, the excavation head 12 provided with the pile head shaping plate 29 as shown in FIG. 11 is used. The pile head shaping plate 29 is hooked on the joint rotation prevention blade 27 at a position having a normal cylindrical diameter, and the reaction force is received by the stirring blade 16.

  FIG. 12 shows a process of such a pile head processing. After the construction with the excavation head 12 of the excavation claw 10, the excavation head 12 with the excavation head 12 of the excavation head 12 shown in FIG. The excavation head 12 having the pile head shaping plate 29 shown in FIG. In the figure, 30 is waste mud.

  In shaping the pile head, by rotating the stirring bit in the reverse direction, the unnecessary slurry escapes in the circumferential direction while pressing the pile head surface, and is peeled off from the pile by the shaping plate.

  Since the ground improvement machine of the present invention can always grasp the position in the height direction of the machine from the site reference point, the upper height position of the slurry can be stopped at the pile design height position, so the waste mud The amount of remaining soil decreases.

  Moreover, waste mud becomes zero by throwing the unnecessary slurry peeled off by the shaping plate into the piles for the next striking. As a result, the solidified material that is thrown into the pile improves the uniaxial compressive strength of the pile, and in the case of the fabric foundation, the pile head level is GL minus and the amount of solidified material is reduced.

  In parallel with the present invention, by providing a mechanism for grasping the tip position of the stirring bit at the time of empty moat construction to eliminate waste mud residual soil according to the present invention device, it is possible to prevent pile core alignment and position error. It becomes possible.

It is a side view which shows one Embodiment of the construction management system of the ground improvement machine of this invention. It is a side view which shows the middle of excavation which shows one Embodiment of the construction management system of the ground improvement machine of this invention. It is explanatory drawing which shows the rod vertical movement displacement of the construction management system of the ground improvement machine of this invention. It is explanatory drawing which shows the initial reference alignment of the construction management system of the ground improvement machine of this invention. It is explanatory drawing which shows one Embodiment of the construction management system of the ground improvement machine of this invention. It is a front view which shows the detail of a digging head. It is a side view of a ground improvement machine. It is explanatory drawing of a light-receiving board. It is explanatory drawing which shows the signal control of a light-receiving board. It is a front view which shows the excavation head 1 used for shaping of a pile head. It is a front view which shows the excavation head 2 used for shaping of a pile head. It is explanatory drawing of the shaping process of a pile head.

DESCRIPTION OF SYMBOLS 1 ... Base machine 2 ... Swing frame 3 ... Elevating cylinder 4 ... Rotation drive device 5 ... Excavation rod 6 ... Leader guide 7 ... Vertical cylinder 8 ... Leader 9a ... Feed device upper part 9b ... Feed device lower part 10 ... Excavation claw 11 ... Lower part Tip excavation blade 12 ... Drilling head 13 ... Outrigger 14a ... Counter weight 14b ... Washing device 15 ... Swivel device 16 ... Agitating blade 17 ... Ground improvement machine 18 ... Rotary laser level meter 18a ... Main body 18b ... Tripod 19 ... Light receiving plate 20 ... Light receiving element 21 ... Microcomputer 22 ... Construction management device 23 ... GL / RM base 25 ... Pile core set plate 26 ... Milk discharge port 27 ... Co-rotating blade 28 ... Pile head excavation claw 29 ... Pile head shaping plate 30 ... Waste mud

Claims (3)

  A rotary laser level meter is installed in the site, and the ground improvement machine hangs the light receiving plate by the light receiving element so that it is always vertical, the light receiving element of the light receiving plate detects the laser light from the rotary laser level meter, A ground improvement machine construction management system that sends the output of the light receiving element to a microcomputer and measures how much the ground improvement machine body is moving up and down from the reference point.   2. The construction management system for a ground improvement machine according to claim 1, wherein a plurality of light receiving elements are arranged vertically, managed by a microcomputer for each light receiving element, and grasping which position of the light receiving element is hit by the laser.   The microcomputer that received the output of the light receiving element outputs the serial signal to the construction management device installed in the driver's seat of the ground improvement machine, and the construction management device corrected the height change of the ground improvement machine to the position below the tip of the stirring bit, The construction management system of the ground improvement machine of Claim 1 or Claim 2 which displays the bottom base depth of a display pile lower part, and the pile head height of an upper part.

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