Construction assist device and construction assist method

Abstract

To provide a construction assist device and a construction assist method to assist the construction of pile holes.SOLUTION: A management device 30 assists the judgement as to whether a pile has arrived at a bearing layer, comprising a control section connected to a display unit. The management device 30: identifies stratum information corresponding to the depths in the ground at a job site; specifies a bearing layer in the strata at a pile hole location; and determines prioritized boring locations among pile holes according to the upper face geometry of the bearing layer, which is output to the display unit.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present disclosure relates to a construction support device and a construction support method for supporting construction of pile holes for installing piles. [Background technology]

[0002] When constructing a structure, multiple piles may be driven into the supporting layer, allowing the load of the structure to be supported by the piles. Therefore, pile holes into which the piles are inserted are extended to the supporting layer. However, it is difficult to establish a qualitative judgment index for confirming whether the piles have reached the supporting layer. Therefore, a ground firmness estimation system capable of efficiently evaluating the firmness of the ground has been studied (see, for example, Patent Document 1). The ground firmness estimation system described in Patent Document 1 acquires values ​​measured by a drilling depth measuring device, a flow rate measuring device, a current measuring device, and a vibration measuring device. Then, a multivariate analysis is performed using the acquired measurement values ​​and firmness index value as explanatory variables and a target variable. When measurement values ​​are acquired during the excavation of the target pile hole, the firmness index value of the ground where the target pile hole is excavated is estimated using these measurement values ​​and a multiple regression equation.

[0003] Furthermore, an evaluation support device for supporting the evaluation of the ground at a proposed building construction site is also under consideration (see, for example, Patent Document 2). The evaluation support device described in Patent Document 2 acquires a three-dimensional geological layer estimation model generated based on geological layer information from a modeling device.

[0004] Furthermore, a pile construction method for constructing a large number of piles on a large site has also been studied (see, for example, Patent Document 3). In the pile construction method described in Patent Document 3, bearing layer data showing the overall picture of the bearing layer expected at the pile driving target site is created from bearing layer depth information at the ground investigation site. Then, pile lengths are set for each pile driving point based on the bearing layer data. Furthermore, bearing layer depth information of the piles at each pile driving point, which is sequentially acquired during the pile driving work, is added as bearing layer depth information to update the bearing layer data. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Patent Publication No. 2021-80737 [Patent Document 2] Japanese Patent Application Publication No. 2023-144684 [Patent Document 3] Japanese Patent Application Laid-Open No. 2019-100082 Summary of the Invention [Problem to be solved by the invention]

[0006] However, depending on the shape of the top surface of the supporting layer, it may be necessary to consider the excavation of pile holes. For example, if the top surface of the supporting layer at a given pile position is steep, measures such as increasing the pile length may be taken. [Means for solving the problem]

[0007] The construction support device for solving the above problems includes a control unit connected to a display device and supports management of the excavation status of pile holes. The control unit identifies a stratum according to the depth of the ground at the construction site, identifies a supporting layer for the pile hole position in the stratum, and identifies a priority excavation position within the pile hole according to the top surface shape of the supporting layer, and outputs the results to the display device. [Effects of the Invention]

[0008] According to the present disclosure, construction of pile holes can be assisted. [Brief explanation of the drawings]

[0009] [Figure 1] 1 is an explanatory diagram illustrating a schematic configuration of a construction support system according to an embodiment. [Figure 2] FIG. 2 is an explanatory diagram of a hardware configuration of the embodiment. [Figure 3] FIG. 2 is an explanatory diagram of functions of a management device of the construction support system according to the embodiment. [Figure 4] FIG. 2 is an explanatory diagram of a processing procedure according to an embodiment. [Figure 5] FIG. 2 is an explanatory diagram of a processing procedure according to an embodiment. [Figure 6] FIG. 2 is an explanatory diagram of a geological formation estimation model according to the embodiment. [Figure 7] FIG. 2 is an explanatory diagram of the relationship between a geological layer estimation model and a pile hole model in the embodiment. [Figure 8] FIG. 2 is an explanatory diagram of the relationship between a geological layer estimation model and a pile hole model in the embodiment. [Figure 9] 1A and 1B are explanatory views of the upper surface of a support layer in an embodiment, where FIG. 1A is an explanatory view of a gently sloping shape, and FIG. 1B is an explanatory view of a steeply sloping shape. [Figure 10] FIG. 2 is an explanatory diagram of a display screen in the embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0010] Hereinafter, a specific embodiment of a construction support device and a construction support method will be described with reference to FIGS. As shown in FIG. 1, the construction support system A1 includes a ground estimation system C1, a construction management system C2, a measuring device 20, and a management device 30 (construction support device), which are connected via a network.

[0011] When drilling pile holes h0 for installing piles of a building, an excavator 10 is used as an excavation device. The excavator 10 includes a base machine 11, a mast 14, and an auger machine 16. The base machine 11 includes a lower traveling body including crawlers 12, and an upper rotating body 13 including an operation room 13a.

[0012] The mast 14 is erected on the base machine 11. A wire for measuring depth is provided inside the mast 14. An auger machine 16 is attached to the mast 14 so that it can be raised and lowered. The auger machine 16 is equipped with a drive motor housed in a box and a drilling rod 17 that is driven and rotated by the drive motor. A drilling head 18 is attached to the tip (lower end) of the drilling rod 17. The drilling head 18 has a pair (two) of swinging drilling arms with drilling blades formed at the tips. The raising and lowering of the drilling head 18 is controlled by an operator in the operation room 13a.

[0013] In addition, a drilling water supply device (not shown) that supplies drilling water to the drilling head 18 is connected to the drilling machine 10. The amount of drilling water is adjusted by the operator in the operation room 13a depending on the drilling conditions.

[0014] The excavation management uses a ground estimation system C1, a construction management system C2, a measuring device 20, and a management device 30. These will be described in detail later. (Example of hardware configuration) FIG. 2 shows an example of the hardware configuration of an information processing device H10 that functions as a ground estimation system C1, a construction management system C2, a measuring device 20, and a management device 30.

[0015] The information processing device H10 includes a communication device H11, an input device H12, a display device H13, a storage device H14, and a processor H15. Note that this hardware configuration is an example, and the information processing device H10 may include other hardware.

[0016] The communication device H11 is an interface that establishes a communication path with other devices and transmits and receives data. The input device H12 is a device that accepts input from the user.

[0017] The display device H13 is a display, a touch panel, or the like that displays various information. The storage device H14 stores data and various programs for executing various functions of the ground estimation system C1, the construction management system C2, the measuring device 20, and the management device 30. Examples of the storage device H14 include a ROM, a RAM, a hard disk, etc.

[0018] The processor H15 controls each process in the ground estimation system C1, the construction management system C2, the measuring device 20, and the management device 30 using the programs and data stored in the storage device H14.

[0019] (Configuration of each functional part) Next, each functional unit that realizes the construction support method will be described. In this embodiment, the management device 30 realizes the construction support method using various information acquired from the ground estimation system C1, the construction management system C2, and the measurement device 20.

[0020] (Ground Estimation System C1) The ground estimation system C1 shown in Fig. 1 is a computer system that generates geological layer information that estimates the geological layers that make up the ground. In this embodiment, a geological layer estimation model and a borehole model that represent the geological layers as a three-dimensional model are used as the geological layer information. This ground estimation system C1 uses three-dimensional CAD (computer-aided design) technology to perform modeling processing (three-dimensional CAD processing) in which each element related to the geological layers that make up the ground is represented as a three-dimensional model (object) and placed in a three-dimensional virtual space.

[0021] In this modeling, a cylindrical 3D model (a borehole model) is generated for each borehole position coordinate. The borehole model is a 3D model that represents the geological layer at the borehole position as a column in the depth direction. Furthermore, the ground estimation system C1 arranges the strata using the minimum depth of each stratum according to the boring results with respect to the boring position coordinates.

[0022] This ground estimation system C1 estimates the layer boundary surface so as to connect common layers in the surrounding cylindrical three-dimensional models. In this case, the layer surface is smoothed by an approximation method. Then, the ground estimation system C1 generates a three-dimensional model (layer estimation model) in which the estimated layer boundary surfaces are set.

[0023] (Construction Management System C2) The construction management system C2 shown in Fig. 1 is a computer system that supports construction progress management. This construction management system C2 includes a construction information storage unit.

[0024] The construction information storage unit stores 3D model information created by 3D CAD using BIM (Building Information Modeling) technology, etc. This 3D model information is recorded when piles are designed using 3D CAD. The 3D model information includes information on the project code, area code, pile number, name, element model, placement, attributes, process code, and progress code.

[0025] The project code is an identifier for identifying each project (construction site). The area code is an identifier for identifying the area into which the construction site is divided. When drilling pile holes, construction is carried out for each area.

[0026] The pile number is an identifier for identifying the element (pile hole) for constructing the pile used in this project. Name is the name of this element (pile hole). The element model is a three-dimensional model (object) of this element (pile hole).

[0027] The placement is information about the coordinates at which each element model is placed. The attribute is attribute information of this element (specifications, dimensions, weight, material, etc.). The process code is an identifier that specifies the order in which this element (hole) is excavated. The progress code is an identifier indicating whether the pile hole is before construction (scheduled date), during construction (implemented date), or completed construction (completion date).

[0028] (Measuring device 20 of excavator 10) As shown in FIG. 1, the measurement device 20 of the excavator 10 includes measuring instruments such as a depth meter 21, a current meter 22, a flow meter 23, a vibration meter 24, and the like.

[0029] The depth meter 21 measures the amount of wire fed out inside the mast 14 and measures the excavation depth according to the position of the excavation head 18. The excavation speed can be calculated from this excavation depth and the excavation time required to excavate this depth.

[0030] The ammeter 22 measures the load current of the drive motor of the auger machine 16 . The flow meter 23 measures the injection flow rate of the drilling water supplied from the drilling water supply device. The vibration meter 24 measures vibrations at the installation location. In this embodiment, the vibration meter 24 is installed inside the operation room 13a, on the roof of the operation room 13a, on the operation lever inside the operation room 13a, and on the mast 14. The vibration meter 24 measures vertical and horizontal vibrations.

[0031] The measurement device 20 then acquires various measurement values ​​from each measuring instrument (depth meter 21, ammeter 22, flow meter 23, and vibration meter 24). In this embodiment, the measurement values ​​acquired during excavation are used as measurement information. During excavation, the measurement device 20 manages the measurement information acquired from each measuring instrument as evidence information during excavation.

[0032] (Management device 30) The management device 30 shown in FIG. 1 is a computer system used by a construction site manager to manage the excavation status.

[0033] As shown in FIG. 3, the management device 30 includes a control unit 31, a ground information storage unit 32, and an excavation information storage unit 33. The control unit 31 performs various processes (processes such as an acquisition stage, an analysis stage, and a support stage) and functions as an acquisition unit 311, an analysis unit 312, and a support unit 313 by executing an excavation management program stored in the memory.

[0034] The acquisition unit 311 acquires various information from the ground estimation system C1, the construction management system C2, and the measuring device 20. Furthermore, the acquisition unit 311 executes a process of registering the acquired information in each storage unit (32, 33).

[0035] The analysis unit 312 analyzes the geological formation estimation model and performs processing to identify the shape of the top surface of the supporting layer. The support unit 313 executes a process for managing the construction status of the construction site. The support unit 313 holds an arrival determination model for determining whether the support layer has been reached, according to the measurement information acquired from the measurement device 20. As the arrival determination model, for example, a multiple regression equation using the measurement values ​​as variables as described in Patent Document 1 can be used.

[0036] The ground information storage unit 32 stores layer model information of the layers that make up the ground. This layer model information is stored when a layer estimation model is acquired from the ground estimation system C1. The layer model information includes 3D model information (object ID, element model, placement information, attribute information) for each layer.

[0037] The object ID is information about an identifier for identifying the three-dimensional shape (three-dimensional model) that constitutes the stratum. The element model is information relating to a three-dimensional object (three-dimensional model) that constitutes a stratum. In this embodiment, a stratum estimation model and a boring model are used as the element model.

[0038] The placement information includes information about the placement of the three-dimensional model (coordinates in the three-dimensional virtual space). The attribute information includes the contents of each element model. The attribute information of the stratum estimation model and the boring model includes a soil type classification that indicates the soil type of the stratum. The soil type classification is a classification of soil type. Here, for example, gravel (coarse gravel, sandy gravel, etc.), gravelly soil (silty gravel, etc.), sand (gravel-mixed sand, etc.), sandy soil (silty sand, etc.), silt (sandy silt, etc.), clayey soil (sandy clay, etc.), etc. are recorded. The supporting layer of the pile is identified by this soil type classification.

[0039] The excavation information storage unit 33 records excavation management information including measurement information acquired from the measuring device 20. This excavation management information is recorded when measurement information is acquired from the measuring device 20. This excavation management information records area code, pile number, construction order, pile hole position, pile specifications, bearing layer evaluation value, measurement information, and bearing layer depth.

[0040] The area code is an identifier for identifying an area into which a construction site is divided into small regions. The stake number is an identifier for identifying each stake. The construction order is the order in which the pile hole h0 for this pile is excavated.

[0041] The pile hole position is a coordinate for specifying the position of the pile at the construction site. The pile specifications are information about the pile length, pile diameter, etc. of this pile hole h0, and the size of the pile hole. The support layer evaluation value is information obtained by evaluating the shape of the upper surface of the support layer at the position of the hole. In this embodiment, the difference in elevation of the upper surface of the support layer within the hole h0 is used as the support layer evaluation value.

[0042] The measurement information includes measurement history data on management items and measurement values ​​for each construction time. The construction time is a date and time, and is recorded periodically (for example, every 1 or 2 seconds). In this embodiment, the management items used are excavation time, current value, water volume, and vibration. The bearing layer depth is the depth at which the bearing layer is determined to have been reached in this pile hole h0.

[0043] (Administrative processing) The management process will be described with reference to Figures 4 to 10. The management process includes an evaluation process and an excavation support process.

[0044] (Evaluation process) First, the evaluation process will be described with reference to Fig. 4. Here, the excavation order is determined using a geological formation estimation model.

[0045] First, the control unit 31 of the management device 30 executes a process for acquiring a stratum estimation model (step S11). Specifically, the ground estimation system C1 generates a 3D model (stratum estimation model) that estimates the stratum of the ground at the construction site based on the boring results at the construction site. Then, the acquisition unit 311 of the control unit 31 acquires the stratum estimation model and the boring model from the ground estimation system C1. Next, the acquisition unit 311 records the 3D model in the ground information storage unit 32. This stratum estimation model makes it possible to identify the stratum based on the depth of the ground to the bearing layer at the construction site.

[0046] 6, in the three-dimensional model 500 (stratum estimation model), a plurality of stratum models 501 are arranged for each soil type classification with respect to the ground surface G1. Each stratum model 501 is estimated from the stratum included in the boring model 502.

[0047] Here, the control unit 31 of the management device 30 executes a process of identifying the stratum at the pile hole position (step S12). Specifically, the analysis unit 312 of the control unit 31 acquires 3D model information for excavating pile holes from the construction management system C2, and registers the excavation management information in the excavation information storage unit 33. In this case, the pile number, construction order, and pile hole position are recorded in the excavation management information. Next, the analysis unit 312 identifies the stratum at the pile hole position in the stratum model recorded in the ground information storage unit 32.

[0048] As shown in FIG. 7, in the stratum model 510, the pile hole models 503 are arranged in correspondence with the positions of the pile holes so as to reach the supporting layer model 511 and have a length sufficient to function as piles. Next, the control unit 31 of the management device 30 executes a process for identifying the shape of the support layer (step S13). Specifically, the analysis unit 312 of the control unit 31 identifies a support layer evaluation value that represents the characteristics of the shape of the upper surface of the support layer at the pile hole position. Here, the elevation difference of the upper surface of the support layer within the pile hole is used as the support layer evaluation value. Then, the analysis unit 312 records the elevation difference (support layer evaluation value) in the excavation information storage unit 33 in association with the pile number.

[0049] As shown in Fig. 8, the pile hole model 503 reaches the supporting layer model 511 via a plurality of stratum models 501. In this case, the shape of the upper surface of the supporting layer differs depending on the pile hole position. As shown in Fig. 9(a), for example, the reach surface 511a has a gentle slope that is relatively close to horizontal, but as shown in Fig. 9(b), the reach surface 511b has a steep slope. Therefore, the reach surface 511b has a larger difference in elevation inside the hole than the reach surface 511a.

[0050] Next, the control unit 31 of the management device 30 executes a priority specification process (step S14). Specifically, the analysis unit 312 of the control unit 31 assigns priorities according to the shape of the upper surface of the bearing stratum at the position of each pile hole within the area. Here, the elevation difference for each pile hole h0 is mapped for each area of ​​the construction site. Next, the analysis unit 312 assigns a higher priority to the pile hole h0 with a larger elevation difference within the area. Then, the analysis unit 312 determines the construction order according to this priority and records it in the excavation information storage unit 33. Note that the priority may also be determined according to the estimated allowance length of the pile's embedment into the bearing stratum (= the penetration length of the pile into the bearing stratum - the design threshold).

[0051] (Drilling support processing) Next, the excavation support process will be described with reference to Fig. 5. This process is carried out when the pile hole h0 is excavated according to the construction order.

[0052] Here, the control unit 31 of the management device 30 executes a measurement information acquisition process (step S21). Specifically, the support unit 313 of the control unit 31 acquires new measurement information from the measuring device 20 and records it in the excavation information storage unit 33.

[0053] Next, the control unit 31 of the management device 30 executes a process of determining whether the object has reached the support layer (step S22). Specifically, the support unit 313 of the control unit 31 outputs the acquired measurement information and the determination result of whether the object has reached the support layer to the display device H13.

[0054] As shown in Fig. 10, a display screen 600 is output to the display device H13. This display screen 600 displays the measurement information (drilling time, current value, integrated current value, vibration spectrum, etc.) recorded in the excavation information storage unit 33 for this pile hole h0. Next, the support unit 313 inputs the measurement information of this pile hole h0 into an arrival determination model to estimate a hardness index value of the ground, and determines whether the bearing stratum has been reached based on this hardness index value. When the support unit 313 determines that the bearing stratum has been reached, it outputs the determination result to the display device H13.

[0055] Next, the control unit 31 of the management device 30 executes a process for outputting the determination status (step S23). Specifically, the support unit 313 of the control unit 31 evaluates the reliability of the estimated hardness index value of the ground using the stratum model information recorded in the ground information storage unit 32. For example, it determines whether the hardness index value and the hardness of the soil classification in the stratum model information match within a predetermined range. The support unit 313 then outputs the match status as the determination status to the display device H13. When the manager confirms that the bearing stratum has been reached, the construction management system C2 registers "construction completed" as a progress code in association with the pile number.

[0056] (Action of this embodiment) Since the geological layer model information of the strata that make up the ground at the construction site is used, the gradient of each pile position can be identified.

[0057] (Effects of this embodiment) (1) In this embodiment, the control unit 31 of the management device 30 executes the process of acquiring a stratum estimation model (step S11), the process of identifying the stratum at the pile hole position (step S12), and the process of identifying the shape of the bearing layer (step S13). As a result, the condition of the bearing layer of the ground where the pile hole h0 is to be excavated can be identified.

[0058] (2) In this embodiment, the control unit 31 of the management device 30 executes a process for identifying priorities (step S14). This allows the order of excavation to be determined according to the condition of the supporting layer. For example, in the case of piles located at a steeply sloping top surface of the supporting layer, the estimated allowance length of embedded piles may be small, which may require some kind of response, such as changing the design of the piles. Such excavation work can be performed with priority.

[0059] (3) In this embodiment, the control unit 31 of the management device 30 executes a process of acquiring measurement information (step S21) and a process of determining whether the target has reached the support layer (step S22). This allows the measurement information to be used to assist in determining whether the target has reached the support layer.

[0060] (4) In this embodiment, the control unit 31 of the management device 30 executes the output process of the judgment status (step S23). This allows necessary measures to be taken depending on the arrival status of the bearing layer. For example, if it is difficult to judge whether the bearing layer has been reached, the control unit 31 can consult with the designer or change the design of the pile hole h0.

[0061] This embodiment can be modified as follows: This embodiment and the following modifications can be combined and implemented within the scope of technical compatibility. In the above embodiment, the control unit 31 of the management device 30 executes a process for determining priority (step S14). Here, the analysis unit 312 assigns priority within an area according to the difference in elevation. The information used to determine the priority is not limited to the difference in elevation, as long as it is information that can evaluate the shape of the support layer. For example, the unevenness (size of unevenness) may be determined, and priority may be given to areas with large unevenness.

[0062] In the above embodiment, a high priority is given to the pile hole h0 in the area with a large difference in elevation. Instead of giving the priority to the pile hole having the area with a large difference in elevation, the priority may be given to the pile hole h0 with a small difference in elevation and easy to judge whether it has reached the bearing layer. In this case, the information of the pile hole h0 excavated in advance can be used as reference information for predicting the state of the bearing layer in the subsequent excavation.

[0063] In the above embodiment, the measurement device 20 of the excavator 10 includes measuring instruments such as a depth meter 21, an ammeter 22, a flow meter 23, and a vibration meter 24. The measurement information includes measurement values ​​of depth, current, flow rate, and vibration. The measurement information is not limited to these. Some of these or other measurement values ​​may also be used. For example, an audio recording device that captures sounds generated during excavation may be used to obtain an acoustic spectrum as measurement information.

[0064] In the above embodiment, the support unit 313 holds an arrival determination model for determining whether the target object has reached the support layer, based on the measurement information acquired from the measurement device 20. The arrival determination model uses a multiple regression equation or the like, with the measurement values ​​as variables. The arrival determination model is not limited to a regression equation based on multiple regression analysis. For example, a prediction model may be used, with each measurement value as input and the presence or absence of the target object having reached the support layer as output. In this case, the prediction model is generated by deep learning using a dataset consisting of the measurement information and the support layer arrival determination information as training data.

[0065] In the above embodiment, the ground estimation system C1, the construction management system C2, and the management device 30 are used, but the hardware configuration is not limited to these. For example, they may be constructed as an integrated computer system.

[0066] In the above embodiment, a reach determination model is generated that predicts the soil type and the arrival at the bearing layer from measurement information (measurement values ​​of excavation time, current, flow rate, and vibration). In addition, the reach determination model may be generated using stratum information predicted using boring results as one of the input information.

[0067] Next, the technical ideas that can be understood from the above-described embodiment and other examples will be described below. (a) The construction support device according to claim 1, characterized in that the measurement information includes at least one of excavation depth data, current value of the excavator, amount of water supplied to the excavator, and data relating to vibration of the excavator.

[0068] (b) The construction support device according to claim 1 or (a) above, characterized in that a height difference is used in the top surface shape. (c) The construction support device according to any one of (a) and (b) above, characterized in that the control unit increases the priority when the difference in elevation is large.

[0069] (d) The construction support device according to any one of (a) to (c) above, characterized in that the control unit acquires excavation information of the priority excavation position. (e) The construction support device described in any one of (a) to (d) above, characterized in that the control unit prompts adjustment of pile design information for an area including the priority excavation position in accordance with the excavation information for the priority excavation position. [Explanation of symbols]

[0070] A1...construction support system, C1...ground estimation system, C2...construction management system, h0...pile hole, 10...drilling machine, 20...measuring device, 21...depth meter, 22...flow meter, 23...flow meter, 24...vibration meter, 30...management device, 31...control unit.

Claims

1. A construction support device comprising a control unit connected to a display device and supporting management of the excavation status of a pile hole, The control unit Identify the geological layers according to the depth of the ground at the construction site, In the stratum, a supporting layer at a pile hole position is identified; A construction support device characterized in that it identifies a priority excavation position in a pile hole according to the shape of the upper surface of the supporting layer and outputs the position to the display device.

2. A method for supporting management of a pile hole excavation status using a construction support device having a control unit connected to a display device, The control unit Identify the geological layers according to the depth of the ground at the construction site, In the stratum, a supporting layer at a pile hole position is identified; Execute a process of identifying a priority excavation position in the pile hole according to the top surface shape of the supporting layer and outputting the result to the display device; A construction support method, characterized in that a pile hole is excavated at the priority excavation position using an excavator.

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