JP2017082463A - Drilling situation management system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an excavation situation management system capable of quantitatively and easily calculating an aperture ratio. SOLUTION: In a caisson bottom of a pneumatic caisson method, an excavation condition management system for managing an excavation condition in a work room surrounded by a ceiling slab, a cutting edge portion hanging from the edge thereof and surrounding the ceiling slab, and an excavation bottom surface. It is 1. Then, the blade edge contact point measuring unit 2 that measures the contact position between the lower surface of the ceiling slab or the inner peripheral surface of the blade edge and the ground over the entire circumference of the work room, and the entire circumference shape of the plane position of the contact position. Area opening ratio calculation unit that calculates the area aperture ratio based on the caisson cross-sectional area and opening cross-sectional area calculated from the opening cross-sectional area integration fixed unit 3 that calculates the opening cross-sectional area from It has 5 and. [Selection diagram] Fig. 1

Description

  The present invention relates to an excavation state management system for managing an excavation state in a work chamber at a caisson bottom of a pneumatic caisson method.

  In the pneumatic caisson method, the excavator in the work room at the bottom of the caisson is remotely operated from the remote control room installed on the ground, thereby reducing the exposure of the worker to the high pressure environment as much as possible and proceeding with the excavation. Can do.

  However, if a failure occurs in the remotely operated excavator, a professional engineer enters the work room and performs repairs. Patent Document 1 discloses a remote support system that allows a specialist to not have to be resident in the field by making it possible to accurately grasp a trouble in an excavator.

  On the other hand, Patent Document 2 discloses a method that enables positioning control of a drilling hole of a rock drill in a working room in order to reduce a burden on an operator of a rock drill (excavator) that performs excavation. .

  In the systems disclosed in these Patent Documents 1 and 2, the excavation state in the work chamber by the excavator is photographed by a monitoring camera and can be confirmed in the remote operation room.

  By the way, in the pneumatic caisson method, in order to prevent the caisson from being oversunk and tilted, as described in Patent Document 3, the amount of ground (ground) in the vicinity of the blade edge is managed. It has been broken.

  The natural ground left in the vicinity of the blade edge is called earth and sand sandle. The inside area of the sand sanddle is defined as the opening cross-sectional area, and the ratio of the caisson cross-sectional area calculated from the entire peripheral shape of the tip of the blade edge is defined as the opening ratio. It has been broken.

JP 2007-205128 A JP 2002-363996 A JP-A-10-37203

  However, in order to calculate the aperture ratio, it is necessary to sketch the excavation situation in the working room photographed by the monitoring camera and obtain the opening cross-sectional area while looking at the drawing. For this reason, it was easy to perform qualitative management, the aperture ratio could only be calculated periodically, and real-time management synchronized with excavation could not be performed.

  Therefore, an object of the present invention is to provide an excavation state management system capable of calculating an aperture ratio quantitatively and easily.

  In order to achieve the above object, the excavation status management system of the present invention includes a ceiling slab, a blade mouth part that hangs down from the edge of the ceiling slab and a bottom surface of the excavation bottom at the bottom of the caisson of the pneumatic caisson method. An excavation status management system for managing an excavation status in an enclosed work chamber, wherein the contact position between the lower surface of the ceiling slab or the inner peripheral surface of the blade edge and the ground is measured over the entire circumference of the work chamber. Cutting edge contact point measuring means, opening cross-sectional area determining means for calculating the opening cross-sectional area from the entire circumferential shape of the planar position of the contact position, and caisson cross-sectional area calculated from the entire circumferential shape of the tip of the blade edge part And an area opening ratio calculating means for calculating an area opening ratio based on the opening cross-sectional area.

  Further, blade edge contact point measuring means for measuring the contact position between the lower surface of the ceiling slab or the inner peripheral surface of the blade edge and the ground over the entire circumference of the work chamber, and excavation in the depth direction of the ground Change point measuring means for measuring the shape change point over the entire circumference of the working chamber, opening volume calculating means for calculating the opening volume from the contact position and the entire circumference of the change point, the ceiling slab and the blade It is also possible to have a configuration comprising volume opening ratio calculating means for calculating the volume opening ratio based on the caisson blade inner volume surrounded by the inner peripheral surface up to the tip of the mouth and the opening volume.

  Furthermore, it can be set as the structure provided with the visualization means which illustrates excavation conditions. Moreover, it can be set as the structure with which the measuring instrument used for the said measurement is attached to the mobile excavator attached to the said ceiling slab. Furthermore, the measuring instrument used for the measurement can be configured to be movable along a rail attached to the ceiling slab.

  The excavation status management system of the present invention configured as described above is the blade edge contact point measurement for measuring the contact position between the lower surface of the ceiling slab or the inner peripheral surface of the blade edge and the ground over the entire circumference of the work room. Means.

  For this reason, the area aperture ratio can be calculated quantitatively and easily based on the measurement result. Furthermore, by providing a change point measuring means for measuring the change point of the excavation shape in the depth direction of the ground over the entire circumference of the work chamber, the volume opening ratio can be calculated quantitatively and easily. .

  In addition, if there is a visualization means that charts the excavation status such as the contact position between the inner peripheral surface of the blade edge and the ground measured over the entire circumference of the work room, the excavation status can be instantaneously visualized. I can grasp it.

  In addition, if the measuring instrument used for measurement at the blade contact point measuring means is attached to a mobile excavator that can be attached to the ceiling slab, there is no need to provide a moving means for the measuring instrument, and a system can be built easily. can do.

  Moreover, if the measuring instrument used for the measurement can be moved along the rail attached to the ceiling slab, the aperture ratio can be quickly calculated at an arbitrary timing.

It is a block diagram explaining the structure of the excavation condition management system of this Embodiment. It is sectional drawing explaining the structure of the working chamber periphery of a caisson bottom part. It is explanatory drawing used for the definition of an area aperture ratio. It is a figure explaining the measurement condition when a measuring instrument is attached to a caisson shovel. It is a figure explaining the measurement condition when moving a measuring instrument with an exclusive rail. It is the display figure which illustrated the excavation situation visualized. It is a block diagram explaining the structure of the excavation condition management system of an Example. It is explanatory drawing used for the definition of volumetric aperture ratio. It is a figure explaining the measurement condition by a measuring device. It is the display figure which illustrated the excavation situation visualized of the example.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a block diagram illustrating a configuration of an excavation state management system 1 described in the present embodiment. Moreover, FIG. 2 is a figure for demonstrating the pneumatic caisson method in which excavation condition management is performed using the excavation condition management system 1 of this Embodiment.

  In the pneumatic caisson method, a work chamber 71 is provided in the caisson bottom 7 a that is the lower part of the caisson housing 7. The work chamber 71 is surrounded by a ceiling slab 72, a blade opening 73 that is suspended from the edge of the ceiling slab 72 and surrounds the ceiling slab 72, and an excavation bottom surface G.

  The caisson housing 7 is constructed in a cylindrical shape, a polygonal cylindrical shape, an elliptical cylindrical shape, or the like, using reinforced concrete, steel, or the like. The upper part of the ceiling slab 72 and the inside of the work chamber 71 are connected by a material shaft 76 and a man shaft (not shown).

  The work chamber 71 is filled with compressed air in order to prevent entry of groundwater, and is in a high-pressure environment. Carrying in materials and the like into the work chamber 71 and discharging the excavated soil are performed via a material shaft 76 provided with a material lock.

  Excavation in the work chamber 71 is performed by a caisson shovel 75 as an excavator. The caisson shovel 75 can move along a traveling rail 74 laid on the lower surface 72 a of the ceiling slab 72.

  The caisson excavator 75 is attached to the traveling rail 74 via the traveling unit 751, and can control the movement and excavation operation by remote operation from a remote operation room (not shown) installed on the ground.

  A plurality of caisson shovels 75 can be arranged in the work chamber 71. Each caisson shovel 75 is set with an area that allows excavation, and a plurality of traveling rails 74 are laid so that excavation of the assigned area is possible.

  When excavation by the caisson shovel 75 proceeds, the total weight of the caisson housing 7 and the load loaded thereon exceeds the settlement resistance of the ground, and the caisson housing 7 sinks.

  The subsidence resistance force that affects the subsidence speed and subsidence amount of the caisson housing 7 can be managed by the amount of ground (sand sand) left in the vicinity of the blade edge part 73. Accordingly, the four excavation shapes G1-G4 will be described with reference to FIG.

  First, in the excavation shape G1 indicated by the solid line, the upper part of the inner peripheral surface 73a of the blade edge portion 73 is exposed, and the bottom width N2 is between the slopes of the earth and sand sanddle. On the other hand, the excavation shape G2 indicated by the alternate long and short dash line has the same amount of exposure of the inner peripheral surface 73a as the excavation shape G1, but the excavation bottom surface G is lowered to the bottom width N1 between the bottom edges of the sand sanddle.

  In contrast, the excavation shape G3 indicated by the two-dot chain line has the same excavation shape G2 and the bottom surface width N1, but the exposure amount of the inner peripheral surface 73a of the blade edge portion 73 is increased. On the other hand, in the excavation shape G4 indicated by the broken line, the inner peripheral surface 73a of the blade edge portion 73 is entirely covered with the ground, and the lower surface 72a of the ceiling slab 72 is supported by the earth and sand sanddle.

  It is clear that the sinking resistance is the highest in the state of the excavation shape G4. The distance between the planar positions of the contact position between the lower surface 72a of the ceiling slab 72 and the ground at this time is defined as an opening width M0.

  On the other hand, the distance between the planar positions of the contact positions between the inner peripheral surface 73a of the cutting edge 73 of the excavation shapes G1 and G2 and the ground is the opening width M1. The opening width M1 is wider than the opening width M0, and it can be said that the sinking resistance is reduced in the state of the opening width M1.

  Furthermore, the contact position between the inner peripheral surface 73a of the cutting edge 73 of the excavation shape G3 and the ground is lower than the contact position of the excavation shapes G1 and G2. The distance between the planar positions of the contact positions of the excavation shape G3 is the opening width M2.

  The opening width M2 is wider than the opening width M1, and it can be said that the sinking resistance is further reduced in the state of the opening width M2 than in the case of the opening width M1. In this way, the opening cross-sectional area is calculated using the opening widths M0, M1, and M2 that indicate the size of the space of the work chamber 71 in the planar position.

  FIG. 3 only shows the opening widths M0, M1, and M2 in one vertical section. Depending on the excavation situation, the opening widths (M0, M1, M2) may be different in all longitudinal sections of the caisson housing 7, so that it extends over the entire circumference of the work chamber 71 (the inner peripheral surface 73a of the blade edge portion 73). To measure the opening width.

  Then, the opening cross-sectional area is calculated from the entire circumferential shape of the opening width (see the contact position line 81 in FIG. 6). On the other hand, the distance between the tips of the blade openings 73 of the caisson housing 7 does not change regardless of the excavation situation.

  That is, the caisson width K in a certain longitudinal section is constant as obtained from the design drawing. However, since the caisson width K may change if the vertical cross section is different, the caisson cross-sectional area is calculated from the entire circumferential shape of the flat surface at the tip of the blade edge portion 73 (see the blade edge tip line 82 in FIG. 6).

  Further, as will be described later, the excavation state is managed based on the measurement results of the measuring instruments 21 and 21A, but the cutting edge 73 and the caisson bottom 7a before being constructed and settling are measured by the measuring instruments 21 and 21A. Calibration can be performed by measuring in advance. And based on the result actually measured by this measuring device 21 and 21A, the caisson cross-sectional area which is the perimeter shape of the blade edge part 73 tip can also be calculated.

  The area opening ratio, which is a kind of opening ratio, is calculated from the opening sectional area and caisson sectional area thus calculated.

Area opening ratio = (opening cross-sectional area) / (caisson cross-sectional area) (Formula 1)
Since the opening cross-sectional area becomes larger as the opening width (M0, M1, M2) becomes wider, it can be said from the above description that the larger the area opening ratio, the lower the sinking resistance and the more easily the caisson housing 7 sinks.

  Therefore, in the excavation state management system 1 of the present embodiment, in order to calculate the opening cross-sectional area, the contact position between the lower surface 72a of the ceiling slab 72 or the inner peripheral surface 73a of the blade edge portion 73 and the ground is measured.

  For this measurement, a measuring instrument 21 for measuring the distance is used. As shown in FIG. 4, the measuring instrument 21 can be attached to a frame of a movable caisson shovel 75 or the like.

  For example, a laser distance meter can be used as the measuring instrument 21. The laser distance meter measures the distance by irradiating the laser beam L toward the measurement object and measuring the time until the reflected light returns.

  For example, as shown in FIG. 4, the caisson shovel 75 is moved to a position adjacent to the blade opening 73. The position of the caisson shovel 75 at this time can be grasped, for example, by attaching an encoder to the traveling unit 751 so that the movement distance can be measured.

  In addition, a detection sensor may be installed at an interval on the traveling rail 74, and the position of the measuring instrument 21 may be specified by an output from the detection sensor when the traveling unit 751 passes.

  Furthermore, a line or symbol that is position information is attached to the lower surface 72a of the ceiling slab 72, and the position information of the measuring instrument 21 is obtained by photographing the position information with a monitoring camera (not shown) attached to the caisson shovel 75. The position can also be specified.

  The measuring instrument 21 includes a mechanism for changing the irradiation angle of the laser light L in the vertical direction. The angle such as the elevation angle or depression angle of the measuring instrument 21 is measured by an inclinometer provided in the measuring instrument 21 or an encoder attached to a motor that controls the angle change.

  If the three-dimensional position of the measuring instrument 21 can be specified, the distance between the lower surface 72a of the ceiling slab 72 or the inner peripheral surface 73a of the blade edge portion 73 and the measuring instrument 21 can be calculated from a design drawing, design data, or a prior measurement result as described above. Can be obtained from.

  On the other hand, when the measuring instrument 21 is shaken up and down and the distance to the lower surface 72a or the inner peripheral surface 73a is measured at each angle (irradiation direction of the laser light L), a distance different from the design data is measured. Then, it can be estimated that the ground remains at that position. For this reason, the contact position of the lower surface 72a or the inner peripheral surface 73a and the ground can also be specified.

  Identification of the contact position between the lower surface 72 a or the inner peripheral surface 73 a and the ground by the measuring instrument 21 is performed over the entire circumference of the work chamber 71. At this time, there may be a portion where measurement is difficult with the measuring instrument 21 attached to the caisson shovel 75.

  Further, there is a case where it is desired to sequentially measure the shape after excavation in real time while excavating with the caisson excavator 75. In such a case, the measuring instrument 21A can be moved by the dedicated rail 23 as shown in FIG.

  The dedicated rail 23 is attached to the lower surface 72 a of the ceiling slab 72. A measuring instrument 21 </ b> A is attached to the traveling unit 24 that is capable of traveling along the dedicated rail 23.

  As shown in FIG. 1, the excavation state management system 1 according to the present embodiment that performs such measurement includes a blade edge contact point measurement unit 2 as a blade edge contact point measurement unit, and an opening cross-section integration determination unit. The opening cross-section integration determining section 3, the caisson cross-section integration determining section 4 as a caisson cross-section integration determining means, the area opening ratio calculating section 5 as an area opening ratio calculating means, and the visualization section 6 as a visualization means. Composed.

  The blade edge part contact point measuring unit 2 is mainly configured by the measuring devices 21 and 21A and the determination processing unit 22 described above. In the determination processing unit 22, the contact position between the lower surface 72a or the inner peripheral surface 73a and the ground is specified by comparing the distance data measured by the measuring instruments 21 and 21A with the inner peripheral shape of the work chamber 71.

  The measurement by the measuring devices 21 and 21A and the specification of the contact position by the determination processing unit 22 are performed over the entire circumference of the work chamber 71. Here, the measurement over the entire circumference of the work chamber 71 can be performed continuously, but may be performed intermittently at intervals in the circumferential direction.

  In the opening cross-section integration determining unit 3, the opening cross-sectional area is calculated from the entire peripheral shape of the planar position of the contact position. That is, the contact position is obtained as three-dimensional data, but the data of the contact position is converted into two-dimensional data on the plane to specify the plane position.

  As shown by the alternate long and short dash line in FIG. 6, the opening cross-sectional area is an inner area surrounded by a contact position line 81 indicating a contact position when viewed in a plane. On the other hand, the caisson cross-section integration determining unit 4 calculates the area inside the blade edge tip line 82 that forms the entire circumferential shape of the tip of the blade edge 73 in plan view as the caisson cross-sectional area.

  The calculation of the caisson cross-sectional area by the caisson cross-section determining unit 4 may be performed once before the caisson housing 7 starts to settle. Moreover, the structure which takes in the value calculated beforehand may be sufficient.

  Then, in the area aperture ratio calculation unit 5, based on the above-described (Equation 1) based on the opening cross-sectional area calculated by the opening cross-section integration determining unit 3 and the caisson cross-sectional area calculated by the caisson cross-section integration determining unit 4. Calculate the area opening ratio.

  The calculation result calculated by the area aperture ratio calculation unit 5 is displayed on a visualization unit 6 such as a display monitor or a printer connected to the computer. Further, the visualization unit 6 can also plot and output the planar positions of the contact position line 81 and the blade tip line 82 as shown in FIG.

  Next, the operation of the excavation status management system 1 of the present embodiment will be described.

  The excavation status management system 1 according to the present embodiment configured as described above has the contact position between the lower surface 72 a of the ceiling slab 72 or the inner peripheral surface 73 a of the blade edge portion 73 and the ground over the entire circumference of the work chamber 71. A blade edge contact point measurement unit 2 for measurement is provided.

  Therefore, the area aperture ratio can be calculated quantitatively based on the measurement result. In addition, since the plane position data (contact position line 81) necessary for calculating the opening cross-sectional area is obtained by the blade edge contact point measuring unit 2, the area opening ratio can be easily calculated.

  Moreover, if the visualization part 6 which illustrates the contact position of the inner peripheral surface 73a of the blade edge part 73 etc. measured over the entire circumference of the work chamber 71 and the ground as a contact position line 81 is provided, Can grasp the excavation situation instantly.

  Further, if the measuring device 21 of the blade edge contact point measuring unit 2 is attached to a mount of a movable caisson shovel 75 attached to the ceiling slab 72, a moving means for the measuring device is provided for a range that can be measured by the measuring device 21. There is no need to provide it, and the system can be easily constructed.

  Further, if the measuring device 21A of the blade edge contact point measuring unit 2 can be moved by the traveling unit 24 along the dedicated rail 23 and the traveling rail 74 attached to the ceiling slab 72, in parallel with excavation, etc. The area aperture ratio can be calculated quickly at an arbitrary timing.

  That is, by providing the traveling unit 24 for the measuring instrument 21A, the excavated shape can be measured immediately while excavating with the caisson excavator 75, so that the area aperture ratio calculated sequentially is visualized. The excavation status can be managed in real time while viewing the contact position line 81 and the like.

  Next, an excavation status management system 9 different from the excavation status management system 1 described in the above embodiment will be described with reference to FIGS. Note that the description of the same or equivalent parts as those described in the above embodiment will be described with the same terms and the same reference numerals.

  In the above embodiment, the case of calculating the area aperture ratio which is a kind of aperture ratio has been described, but in the present embodiment, the case of calculating the volume aperture ratio which is a kind of aperture ratio will be described.

Volume opening ratio = (opening volume) / (caisson blade inner volume) (Formula 2)
In other words, the opening cross-sectional area of (Equation 1) described in the above embodiment indicates the cross-sectional area at a certain position in the vertical direction of the work chamber 71, but the opening volume is the volume of the space that becomes the work chamber 71. Will show. This open volume is compared with the caisson blade inner volume.

  The caisson blade edge volume is the volume of the space surrounded by the inner peripheral surface 73a of the blade edge 73 and the lower surface 72a of the ceiling slab 72 with the vertical position (height) of the tip of the blade edge 73 as the bottom surface. Point to.

  As shown in FIG. 7, the excavation status management system 9 of the present embodiment includes an excavation shape measurement unit 91 including a blade edge contact point measurement unit and a change point measurement unit, and an opening volume calculation unit as an opening volume calculation unit. 93, a caisson blade volume calculation unit 94 as a caisson blade volume calculation unit, a volume opening rate calculation unit 95 as a volume opening rate calculation unit, and a visualization unit 96 as a visualization unit.

  The excavation shape measuring unit 91 is mainly configured by a measuring instrument 911 similar to the measuring instruments 21 and 21A described above and a determination processing unit 912. In the determination processing unit 912, the contact position between the lower surface 72a or the inner peripheral surface 73a and the ground is specified by comparing the distance data measured by the measuring instrument 911 with the inner peripheral shape of the work chamber 71.

  When the contact position is specified, not only the planar position described in the above embodiment but also the vertical position (depth positions H0, H1, and the like) as shown in FIG. H2) can be calculated.

  For example, when the lower surface 72a of the ceiling slab 72 is the depth position H0, the contact position of the excavation shape G4 is also the depth position H0. Further, the contact position of the excavation shapes G1 and G2 is the depth position H1, and the contact position on the left side of the excavation shape G3 is the depth position H2.

  Further, the vertical position of the bottom surface width N1 of the excavation shapes G2 and G3 is indicated by a depth position D1 that is a vertical position with the tip of the blade edge portion 73 as a reference height. Further, the vertical position of the bottom surface width N2 of the excavation shapes G1 and G4 is indicated by the depth position D2.

  Such excavation shapes G1, G2, G3, and G4 can be measured by a measuring instrument 911 as shown in FIG. That is, the measurement point L1 at which the distance is measured by irradiating the laser beam L with the measuring instrument 911 tilted at an elevation angle is a measurement of the boundary position between the lower surface 72a of the ceiling slab 72 and the inner peripheral surface 73a of the blade edge portion 73. Result.

  Further, the measurement point L2 when the measuring instrument 911 is directed downward indicates the contact position between the ground and the inner peripheral surface 73a as described above. The distance measured when the measuring instrument 911 is further swung downward represents the excavation shape of the earth and sand sanddle.

  The measurement point L3 that becomes the boundary between the earth and sand sanddle and the excavation bottom surface G is a change point at which the excavation shape in the depth direction changes greatly. For example, the measurement point L3 at the turning point at which the amount of change in the distance measured with respect to the angle at which the measuring instrument 911 is swung increases can be used as the change point in the depth direction.

  In the determination processing unit 912, a change point in the depth direction is specified from the measurement result by the measuring instrument 911, and calculation processing is performed to calculate the bottom surface widths N1, N2 and the depth positions D1, D2 from the specified change point.

  The opening volume calculation unit 93 specifies the shape of the lower surface 72a of the ceiling slab 72 and the inner peripheral surface 73a of the blade edge 73, the contact position between the ground and the inner peripheral surface 73a, and the position of the change point in the depth direction. The opening volume is calculated from the entire circumferential shape of the work chamber 71 to be operated.

  That is, since the contact position between the ground and the inner peripheral surface 73a is obtained as three-dimensional data, it is converted into the values of the opening widths M0, M1, M2 and the depth positions H0, H1, H2 as shown in FIG. Can do. Further, since the position of the change point in the depth direction is also obtained as three-dimensional data, it can be converted into the values of the bottom surface widths N1, N2 and the depth positions D1, D2.

  In this way, if the peripheral position data is obtained continuously or intermittently in the depth direction over the entire circumference of the work chamber 71, the volume of the work chamber 71 can be obtained by integrating these values. Easy to do.

  On the other hand, the caisson blade inner volume calculation unit 94 calculates the volume surrounded by the inner peripheral surface 73a and the lower surface 72a with the vertical position of the tip of the blade mouth 73 as the bottom surface as the caisson blade inner volume.

  The calculation of the caisson blade inner volume by the caisson blade inner volume calculation unit 94 may be performed once before the caisson housing 7 starts to settle, similarly to the calculation of the caisson cross-sectional area described above. Moreover, the structure which takes in the value calculated beforehand may be sufficient.

  Then, in the volume opening ratio calculation unit 95, based on the opening volume calculated by the opening volume calculation unit 93 and the caisson blade inner volume calculated by the caisson blade inner volume calculation unit 94, from the above-described (Expression 2). Calculate the volumetric aperture ratio.

  The calculation result calculated by the volumetric aperture ratio calculation unit 95 is displayed on a visualization unit 96 such as a display monitor or a printer connected to the computer. Further, in the visualization unit 96, in addition to the contact position line 81 and the blade edge tip line 82 as shown in FIG. 10, a change point line 83 (broken line) indicating the planar position of the change point in the depth direction is plotted and output. can do. The area inside the change dotted line 83 represents the area of the excavation bottom surface G.

  Thus, by measuring with the measuring device 911, not only the planar shape of the excavation shape G1-G4 but also the three-dimensional shape can be easily grasped. As a result, excavation in the work chamber 71 is performed in more detail using a new index that is quantitatively calculated, not only the area opening ratio that is generally used for sedimentation management of the pneumatic caisson method. The situation can be managed.

  Other configurations and operational effects are substantially the same as those in the above-described embodiment, and thus description thereof is omitted.

  The embodiments and examples of the present invention have been described in detail with reference to the drawings. However, the specific configuration is not limited to the embodiments and examples, and the gist of the present invention is not deviated. Design changes are included in the present invention.

  For example, in the above-described embodiments and examples, a case where a one-dimensional laser rangefinder is used as the measuring instruments 21, 21A, 911 has been described. However, the present invention is not limited to this, and two-dimensional or three-dimensional A laser distance meter, a distance meter combining imaging data and image processing, or the like may be used as a measuring instrument, blade edge contact point measuring means, or change point measuring means.

  Further, in the embodiment and examples, the caisson cross-sectional area or the caisson blade volume is calculated by the caisson cross-section integration determining unit 4 or the caisson blade volume calculation unit 94, but is not limited thereto. It is also possible to load the excavation status management systems 1 and 9 using values calculated separately in advance.

1 Excavation Status Management System 2 Cutting Edge Contact Point Measurement Unit (Cutting Edge Contact Point Measuring Means)
21, 21A Measuring instrument 23 Dedicated rail 24 Traveling section 3 Opening cross-section integration fixing section (opening cross-section integration determining means)
5 Area opening ratio calculation part (Area opening ratio calculation means)
6 Visualization part (visualization means)
7a Caisson bottom portion 71 Work chamber 72 Ceiling slab 72a Lower surface 73 Blade portion 73a Inner circumferential surface 74 Traveling rail 75 Caisson excavator (excavator)
81 Contact position line (opening cross-sectional area)
82 Cutting edge tip line (Caisson cross-sectional area)
83 Change point line 9 Excavation situation management system 91 Excavation shape measuring unit (blade edge contact point measuring means, changing point measuring means)
911 Measuring instrument 93 Opening volume calculation part (opening volume calculation means)
95 Volume opening ratio calculation part (volume opening ratio calculation means)
96 Visualization part (visualization means)
G Drilling bottom L2 Measurement point (contact position)
L3 measurement point (change point in the depth direction)

Claims (5)

An excavation situation management system for managing an excavation situation in a work room surrounded by a ceiling slab and a blade edge part that surrounds the ceiling slab and an excavation bottom surface at a caisson bottom part of a pneumatic caisson method. ,
Blade edge contact point measuring means for measuring the contact position between the lower surface of the ceiling slab or the inner peripheral surface of the blade edge and the ground over the entire circumference of the working chamber,
Opening cross-section integration determining means for calculating the opening cross-sectional area from the entire circumferential shape of the planar position of the contact position;
An excavation state management system comprising: an area opening ratio calculating means for calculating an area opening ratio based on the caisson cross-sectional area calculated from the entire peripheral shape of the tip of the blade edge and the opening cross-sectional area . An excavation situation management system for managing an excavation situation in a work room surrounded by a ceiling slab and a blade edge part that surrounds the ceiling slab and an excavation bottom surface at a caisson bottom part of a pneumatic caisson method. ,
Blade edge contact point measuring means for measuring the contact position between the lower surface of the ceiling slab or the inner peripheral surface of the blade edge and the ground over the entire circumference of the working chamber,
Change point measuring means for measuring the change point of the excavation shape in the depth direction of the ground over the entire circumference of the working chamber;
An opening volume calculating means for calculating an opening volume from the entire circumference of the contact position and the changing point;
A volume opening ratio calculating means for calculating a volume opening ratio based on the caisson blade inner volume surrounded by the ceiling slab and the inner peripheral surface up to the tip of the blade edge and the opening volume is provided. And excavation situation management system.   The excavation status management system according to claim 1 or 2, further comprising a visualization means for plotting the excavation status.   The excavation state management system according to any one of claims 1 to 3, wherein a measuring instrument used for the measurement is attached to a mobile excavator attached to the ceiling slab.   The excavation state management system according to any one of claims 1 to 4, wherein a measuring instrument used for the measurement is movable along a rail attached to the ceiling slab.