Method for estimating settlement, method for reinforcing buildings, and display control device.

Abstract

The objective is to provide a method for estimating settlement amounts with high accuracy, regardless of the number of layers expected to settle, as well as a cost-effective method for estimating settlement amounts, a method for reinforcing buildings, and a display and control device. [Solution] The method includes the steps of identifying the lower and upper endpoints of each of the multiple settlement assumption layers at multiple set location BPs, constructing a virtual ground model including the multiple settlement assumption layers, and calculating the assumed settlement amount at multiple pile driving assumption locations PPs from the virtual ground model.

Description

Technical Field

[0001] The present disclosure relates to a settlement amount estimation method, a building reinforcement method, and a display control device.

Background Art

[0002] As a foundation structure of a building, piles may be driven into the ground. When the ground where the piles are driven contains soft ground, the piles may sink after driving due to the layer where settlement is assumed (settlement assumed layer). When constructing a building, measures may be taken to prevent the piles from sinking by increasing the number of piles (multiple piles), or the settlement of the piles may be allowed, and the foundation structure may be designed after estimating the settlement amount of the piles. In Patent Document 1, which is an example of the prior art, the actual loading test results are summarized for each geology and in relation to the characteristics of the ground, particularly the N value, and based on this, the relationship between the load and the settlement amount is summarized from a small number of measured values, and a technique is disclosed that enables reasonable estimation of the settlement amount of embedded piles by the load transfer method. In addition, Patent Document 2, which is an example of the prior art, discloses a technique capable of predicting the settlement amount of the ground and the structure after liquefaction generated by an earthquake for the ground where the structure exists.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Patent Document 2

Summary of the Invention

Problems to be Solved by the Invention

[0004] When measures are taken to prevent the piles from sinking by increasing the number of piles, there is a problem that the cost increases. On the other hand, when estimating the settlement amount of the piles by allowing settlement according to the conventional technique, there is a problem that it takes time and cost. Furthermore, conventional technology only estimates settlement at a representative location within the ground, which presents a challenge as unexpected settlement can occur in areas other than the representative location. Furthermore, conventional methods had not considered cases where multiple layers corresponding to the expected settlement layer exist in the depth direction within a given geological layer. Therefore, there was room for improvement in the method of estimating settlement amounts when multiple settlement-prone layers exist in conventional methods.

[0005] This disclosure is made in view of the circumstances described above, and aims to provide a method for estimating settlement, a method for reinforcing buildings, and a display control device that can accurately estimate the amount of settlement regardless of the number of settlement layers, while keeping costs down. [Means for solving the problem]

[0006] The display control method of this disclosure includes the steps of: identifying the lower and upper endpoints of each of the multiple settlement assumption layers at multiple set locations; constructing a virtual ground model including the multiple settlement assumption layers; and calculating the assumed settlement amount at each of the multiple settlement assumption layers at multiple pile driving assumption locations from the virtual ground model. [Effects of the Invention]

[0007] According to this disclosure, it is possible to provide a method for estimating the amount of settlement with high accuracy, regardless of the number of layers expected to settle, while keeping costs down, as well as a method for reinforcing buildings and a display control device. [Brief explanation of the drawing]

[0008] [Figure 1] This is a plan view of the ground in the embodiment. [Figure 2] This is a flowchart of the settlement estimation method according to the embodiment. [Figure 3] In this embodiment, the borehole logs at multiple set locations are schematic diagrams. [Figure 4] In this embodiment, the borehole logs at multiple set locations are partially enlarged views. [Figure 5] It is a schematic diagram of a virtual ground model in an embodiment. [Figure 6] It is a flowchart of a building reinforcement method according to an embodiment. [Figure 7A] It is a block diagram of a display control device according to an embodiment. [Figure 7B] It is a block diagram of a control unit included in the display control device according to an embodiment. [Figure 8] It is a first example of information displayed by a display unit in an embodiment. [Figure 9] It is a second example of information displayed by a display unit in an embodiment. [Figure 10] It is a first example of information displayed by a display unit in an embodiment.

MODE FOR CARRYING OUT THE INVENTION

[0009] Hereinafter, referring to the drawings, a settlement amount estimation method, a building reinforcement method, and a display control device according to an embodiment of the present disclosure will be described.

[0010] (Settlement amount estimation method) FIG. 1 is a plan view of the ground G in the present embodiment. The settlement amount estimation method according to the present embodiment is a method of estimating the settlement amount of piles P that are driven into the ground G in plurality and form part of the foundation of a building, as shown in FIG. 1. By using this method, for example, the additional stress generated in the foundation beam B provided between the plurality of piles P and the deformation angle of the foundation beam B due to the additional stress are calculated. Thereby, the settlement amount of the pile P is estimated, and for example, differential settlement of a building is suppressed. Differential settlement is a phenomenon in which each position of a building (the foundation of the building) sinks unevenly. When differential settlement occurs, not only does the building simply sink, but settlement occurs such that the building tilts. Therefore, in a building where differential settlement has occurred, in addition to inconveniences in use such as the floor tilting, uneven forces are applied, which may cause damage to structural members.

[0011] Figure 2 is a flowchart of the settlement amount estimation method according to the present embodiment. This settlement amount estimation method may be realized, for example, by information processing of a computer. The settlement amount estimation method according to the present embodiment includes the following first to third steps. The first step SA1 of settlement amount estimation shown in FIG. 2 is a step of specifying the lower end points and upper end points of each of a plurality of settlement assumption layers at a plurality of setting positions BP shown in FIG. 1. The settlement assumption layer refers to a layer in which settlement of the driven pile P is assumed among a plurality of strata included in the ground G shown in FIG. 1. The settlement assumption layer includes a soft ground. In the present embodiment, the settlement assumption layer includes at least one of a clay layer and a silt layer. Note that the clay layer is a stratum composed of soil particles with a particle size of 0.005 mm or less. The silt layer is a stratum composed of soil particles with a particle size of 0.075 to 0.005 mm.

[0012] In the present embodiment, among the plurality of strata, there are a plurality of strata corresponding to the settlement assumption layer in the depth direction. Specifically, the number of settlement assumption layers in the present embodiment is three. The number of settlement assumption layers indicates that among the plurality of strata included in the ground G, three layers are settlement assumption layers. The number of settlement assumption layers may be two or more and is not limited.

[0013] Figure 3 is a schematic diagram of a boring columnar diagram Bc at a plurality of setting positions BP in the present embodiment. In the first step SA1 of settlement amount estimation, first, as shown in FIGS. 1 and 3, a plurality of setting positions BP for specifying the lower end points BPb and upper end points BPt of each of the plurality of settlement assumption layers SL in the ground G are determined. In the present embodiment, the setting position BP is a position where a boring survey is performed before construction of a building in the ground G. The determination of the setting position BP may be performed by a person. The identification of the lower endpoint BPb and upper endpoint BPt of each of the multiple settlement-prone layers SL at multiple designated locations BP is preferably done based on the boring log Bc. That is, by conducting boring surveys at multiple designated locations BP, the positions of the lower endpoint BPb and upper endpoint BPt of each of the multiple settlement-prone layers SL at multiple designated locations BP are extracted, as shown in Figure 3. This extraction may be performed by a human or by a computer. If performed by a human, the human may input the extraction results into the computer. In this embodiment, the setting position BP is the position shown in Figure 1, and there are six setting positions: the first setting position BP1 to the sixth setting position BP6. In the example shown in Figure 3, the settlement-prone layer SL is the area indicated by the shaded lines, and the layer sandwiching the settlement-prone layer SL above and below is the bearing layer SH. The bearing layer SH may be hard ground.

[0014] The determination of whether the ground is soft or hard is made by measuring the N-value through boring surveys. A higher N-value indicates harder ground. In this embodiment, layers with low N-values ​​are determined to be the settlement-prone layer SL. The N-value is an indicator of the hardness of the ground and may be measured, for example, by a standard penetration test.

[0015] In this embodiment, the boring survey at the designated location BP is conducted to a depth of 90m. Therefore, in this embodiment, the length L1 in the boring log shown in Figure 3 represents 90m, indicating the survey results from the ground surface to a depth of 90m. While there are no restrictions on the depth to which boring surveys can be conducted, strata located deeper than 100m from the surface are considered to have very little impact on the amount of settlement, even if there is a settlement-prone layer SL, because the force is dispersed at a distance from the point of application. Therefore, boring surveys can be conducted at depths of 100m or less from the surface.

[0016] Figure 4 is a magnified view of a portion of area A shown in Figure 3. In this embodiment, the vertical length of the settlement-assumed layer SL is divided into a plurality of reference lengths X and a fractional length Y that is shorter than the reference length X, as shown in Figure 4. That is, for example, as shown in Figure 4, the vertical length Z (Za1) of the settlement-assumed layer SL (first settlement-assumed layer D1) is expressed by the following formula, where a is an arbitrary natural number. Z = aX + Y In other words, the vertical length Z of the settlement-assuming layer SL can be expressed by adding a fractional length Y to a multiple of the reference length X. For example, as shown in Figure 3, if the vertical lengths Z of the settlement-assuming layer SL (first settlement-assuming layer D1) at the first setting position BP1, second setting position BP2, and third setting position BP3 are Za1, Zb2, and Zc3, respectively, then Za1, Zb2, and Zc3 can be expressed by the following equations. Za1 = aX + Y1 Zb² = bX + Y² Zc3 = cX + Y3 In the above formula, a, b, and c are natural numbers. In this way, by managing multiple vertical lengths Z of the settlement-assuming layer SL at multiple set locations BP based on a single reference length X, it becomes easier to compare the vertical lengths Z of multiple settlement-assuming layer SL at multiple set locations BP. This management is performed, for example, by computer.

[0017] The second step SA2 of the settlement estimation shown in Figure 2 is the step of constructing a virtual ground model VG that includes multiple settlement-assuming layers SL. Figure 5 is a schematic diagram of the virtual ground model VG in this embodiment. Specifically, first, the intervals between the lower endpoints BPb of each of the multiple settlement-assuming layers SL at multiple set position BP are interpolated to generate the virtual lower surface SLb for each of the multiple settlement-assuming layers SL. Simultaneously, the intervals between the upper endpoints BPt of each of the multiple settlement-assuming layers SL at multiple set position BP are interpolated to generate the virtual upper surface SLt for each of the multiple settlement-assuming layers SL. As a result, a virtual ground model VG is constructed for the ground G at the site where the building will be constructed, as shown in Figure 5. In other words, interpolation between points may be performed based on the positions of the upper end point BPt and the lower end point BPb of the settlement-assumed layer SL at the designated position BP, which are obtained by boring surveys. In this embodiment, interpolation between points is preferably performed as surface interpolation, where the space between each point is a curved surface. Surface interpolation is performed, for example, using a known 3D modeling tool. The construction of the virtual ground model VG may be performed by a computer.

[0018] In this embodiment, there are three layers where settlement is assumed. Therefore, three virtual lower surfaces SLb are generated: the first virtual lower surface SLb1 of the first assumed settlement layer D1, the second virtual lower surface SLb2 of the second assumed settlement layer D2, and the third virtual lower surface SLb3 of the third assumed settlement layer D3. Similarly, three virtual upper surfaces SLt are generated: the first virtual upper surface SLt1 of the first assumed settlement layer D1, the second virtual upper surface SLt2 of the second assumed settlement layer D2, and the third virtual upper surface SLt3 of the third assumed settlement layer D3.

[0019] Thus, even when there are multiple settlement-prone layers SL, a virtual ground model VG showing the three-dimensional positional relationship of multiple settlement-prone layers underground can be constructed by generating virtual upper surfaces SLt and virtual lower surfaces SLb for each of the multiple settlement-prone layers.

[0020] In the example shown in Figure 5, only the virtual upper surface SLt and virtual lower surface SLb of each of the multiple settlement-assuming layers SL underground are displayed. However, a supporting layer SH exists between the ground surface and the upper surface SLt1 of the first settlement-assuming layer D1, between the virtual lower surface SLb1 of the first settlement-assuming layer D1 and the upper surface SLt2 of the second settlement-assuming layer D2, and between the virtual lower surface SLb2 of the second settlement-assuming layer D2 and the upper surface SLt3 of the third settlement-assuming layer D3.

[0021] The third step SA3 of the settlement estimation shown in Figure 2 is a step in which the assumed settlement amounts at multiple assumed pile driving locations PP are calculated from the virtual ground model VG constructed in the second step SA2. In this embodiment, the predicted assumed settlement amount is the settlement amount due to consolidation settlement.

[0022] First, the locations where multiple piles P will be driven in the building, i.e., multiple assumed pile driving locations PP, are defined. Next, in the virtual ground model VG of the building site, the locations of the multiple assumed settlement layers SL at the assumed pile driving locations PP are identified. Then, for example, the assumed settlement amount of pile P at each of the multiple assumed pile driving locations PP is calculated using the one-dimensional settlement calculation method described on page 44 of the "Guidelines for the Design of Building Foundation Structures (Architectural Institute of Japan, 3rd edition, published November 2019)". The assumed settlement amount, denoted as consolidation settlement S(m), can be calculated using the compression curve method (e~logσ method) shown in Equation 1 below.

[0023]

number

[0024] Here, Δe i This is the increase in vertical effective stress Δσ at the center of layer i due to embankment construction, building construction, etc. z (kN / m 2 This is the change in void ratio caused by ). Note that Δe i This value was read from the e~logσ curve. Also, e 0i This is the effective vertical stress σ at the center of the i-th layer before construction. 1zi This is the gap ratio in '. H i This is the thickness (m) of layer i.

[0025] In this embodiment, a one-dimensional settlement calculation formula is used to estimate the settlement of multiple assumed settlement layers SL. For example, a known method for estimating ground settlement is to use FEM (Finite Element Method) analysis. FEM analysis requires calculations in two or three dimensions, so it takes a relatively long time to obtain the calculation results (for example, about two weeks). In contrast, one-dimensional settlement calculation as in this embodiment takes a relatively short time to obtain the calculation results (for example, about half a day to one day). Furthermore, FEM analysis makes estimations based on the weakest part of each assumed settlement layer SL, resulting in settlement calculations only for a portion of the area. In contrast, one-dimensional settlement calculations like those in this embodiment can accurately determine settlement at all assumed pile driving locations PP.

[0026] In this embodiment, some of the multiple set positions BP coincide with some of the multiple assumed pile driving positions PP, or some of the multiple assumed pile driving positions PP coincide with some of the multiple set positions BP. In other words, some or all of the piles P may be driven into the ground G at designated locations BP where the lower end point BPb and upper end point BPt of the settlement-prone layer SL are identified. Preferably, at least some of the multiple designated locations BP coincide with multiple assumed pile driving locations PP. This makes it possible to calculate the assumed settlement amount of the piles P driven into the designated locations BP based on the actual boring survey results, thereby improving the accuracy of the estimation. Alternatively, the expected deformation angle of foundation beam B may be calculated from the assumed settlement amount. The calculation of the deformation angle may also be performed by a computer.

[0027] In this embodiment, some of the multiple set positions BP do not have to coincide with the multiple assumed pile driving positions PP, or some of the multiple assumed pile driving positions PP do not have to coincide with the multiple set positions BP. From the perspective of cost and labor expenses, it is often difficult to conduct boring surveys at all locations where piles will be driven (planned pile driving locations PP). Therefore, as shown in Figure 1, the number of planned pile driving locations PP may be greater than the number of designated locations BP where boring surveys will be conducted. As described above, by constructing a virtual ground model VG based on the results of a boring survey at the designated location BP, it is possible to accurately estimate the locations of multiple settlement-prone layers SL, and to accurately estimate the amount of settlement, even at the assumed pile-driving location PP, where the location of the settlement-prone layer SL has not actually been surveyed (a location different from the designated location BP).

[0028] The degree of ground weakness varies depending on the subsidence layer SL. Therefore, the calculation of the assumed settlement amount for each of the multiple subsidence layer SL is performed separately for the first subsidence layer D1, the second subsidence layer D2, and the third subsidence layer D3. The assumed settlement amount for the first subsidence layer D1 is designated as the first assumed settlement amount, the assumed settlement amount for the second subsidence layer D2 is designated as the second assumed settlement amount, and the assumed settlement amount for the third subsidence layer D3 is designated as the third assumed settlement amount. The assumed settlement amount at the assumed pile driving location PP (total assumed settlement amount) is calculated by summing the assumed settlement amounts of the subsidence layer SL that satisfy the following conditions among the multiple subsidence layer SL.

[0029] When driving piles, if the lower end of the pile is in the area of ​​the settlement-prone layer SL, the settlement-prone layer SL may not be able to support the lower end of the pile, and there is a risk that the pile will sink within the settlement-prone layer SL. Therefore, it is preferable to drive the piles so that the lower end of the pile is in one of the areas of the bearing layer SH. Hereafter, the bearing layer SH that includes the lower end of the pile will be referred to as the pile bearing layer SHp.

[0030] When the lower end of a driven pile is in the region of the pile support layer SHp, the consolidation settlement of the settlement-prone layer SL in the soil below the pile support layer SHp causes the pile to settle. That is, as shown in Figures 3 and 5, in this embodiment, there are three settlement-prone layers SL in the depth range investigated by boring, but the number of settlement-prone layers SL that affect the settlement estimation differs depending on which region of the support layer SH the lower end of the pile is in.

[0031] For example, in this embodiment, the pile support layer SHp is the support layer SH2 between the first settlement assumption layer D1 and the second settlement assumption layer D2, which is part of the support layer SH shown in Figure 3. Therefore, in this embodiment, the settlement assumption layers SL that affect the settlement amount estimation are the second settlement assumption layer D2 and the third settlement assumption layer D3, which are located below the pile support layer SHp (the lower end of the pile).

[0032] Therefore, in this embodiment, the first assumed settlement amount is not used to calculate the total assumed settlement amount at the assumed pile driving location PP. In this embodiment, the total assumed settlement amount at the assumed pile driving location PP is the sum of the second assumed settlement amount of the second assumed settlement layer D2, which is located in a stratum below the pile support layer SHp, and the third assumed settlement amount of the third assumed settlement layer D3.

[0033] (Building reinforcement method) Next, a building reinforcement method according to this embodiment will be described. As shown in Figure 1, the building reinforcement method according to this embodiment is a method for reinforcing a building, in particular a foundation beam B that is provided to connect multiple piles P that are driven into the ground. The foundation beam B is reinforced, for example, by improving the second moment of area by changing the cross-sectional shape of the foundation beam B, or by arranging reinforcing bars around the foundation beam B. In the building reinforcement method according to this embodiment, the decision of whether or not to reinforce the foundation beam B in the building is made by the following steps. Figure 6 is a flowchart of the building reinforcement method according to this embodiment. In other words, the building reinforcement method according to this embodiment includes the following steps 1 to 3.

[0034] The first step SB1 of building reinforcement is to calculate the expected settlement difference value from the expected settlement amounts at multiple assumed pile driving locations PP. The assumed settlement difference value is the difference in assumed settlement between adjacent piles P among the multiple piles P driven into a building. In this embodiment, the assumed settlement difference value is calculated for each combination of piles P connected by the foundation beam B. In the first step SB1 of building reinforcement, the assumed settlement amount is estimated using the settlement estimation method described above. Note that the first step SB1 of building reinforcement may be performed, for example, by computer.

[0035] The second step in building reinforcement, SB2, is the step of calculating the additional stress generated in the foundation beam B from the assumed settlement difference value. The additional stress on foundation beam B is the stress caused by the force applied to deform foundation beam B, resulting from the relative displacement of the positions of both ends of foundation beam B due to the different settlement amounts of the piles P connected by foundation beam B. In this embodiment, the additional stress on the foundation beam B is calculated for each of the multiple foundation beams B provided in the building, either some or all of them. The second step SB2 of building reinforcement may be performed, for example, by a computer.

[0036] The third step SB3 of building reinforcement is the step of determining the placement of reinforcing bars according to the added stress. That is, for example, if the added stress of the foundation beam B calculated in the second step SB2 is within the allowable range, then reinforcing bars are not required. If the added stress of the foundation beam B calculated in the second step SB2 exceeds the allowable range, then the density of the reinforcing bars is calculated according to the magnitude of the added stress, and it is considered to provide reinforcing bars around the foundation beam B. Furthermore, if the additional stress on foundation beam B is large and the reinforcing steel alone cannot adequately reinforce foundation beam B, the shape of foundation beam B may be changed to improve its second moment of area. The third step SB3 of building reinforcement may be performed, for example, by computer.

[0037] (Display control device) Next, the display control device 100 according to this embodiment will be described. The display control device 100 performs the calculations in the settlement estimation method and building reinforcement method described above, and also displays various information to the user in a visually accessible manner. Figure 7A is a block diagram of the display control device 100 according to this embodiment. The display control device 100 according to this embodiment includes a control unit 110 which comprises a processor 10 such as a CPU (Central Processing Unit) connected by a bus and a memory 20, and executes a program. The display control device 100 displays various information on the display unit 30 by executing the program. The display unit 30 is comprised of, for example, a display device such as a CRT (Cathode Ray Tube) display, a liquid crystal display, or an organic EL (Electro-Luminescence) display. Although the display unit 30 shown in Figure 7A is located within the display control device 100, this disclosure is not limited thereto, and the display unit 30 may be located outside the display control device 100.

[0038] Figure 7B is a block diagram of the control unit 110 in the display control device 100 according to this embodiment. The control unit 110 of this embodiment includes a endpoint identification unit 111, a ground model construction unit 112, an assumed settlement amount display control unit 113, an assumed settlement difference value calculation unit 114, and a deformation angle calculation unit 115. The display control device 100 includes a endpoint identification unit 111 that identifies the lower endpoint BPb and upper endpoint BPt of each of the multiple settlement assumption layers SL at multiple set position BP as shown in Figure 3, a ground model construction unit 112 that constructs a virtual ground model VG including the multiple settlement assumption layers SL as shown in Figure 5, and an assumed settlement amount display control unit 113 that displays the assumed settlement amount of each of the multiple settlement assumption layers SL at multiple pile driving assumption positions PP on the display unit 30 from the virtual ground model VG. In the display control device 100, the construction of the virtual ground model VG may be performed by interpolating between the specified lower endpoints BPb to generate the virtual lower surface SLb for each of the multiple settlement-assumed layers SL, and by interpolating between the specified upper endpoints BPt to generate the virtual upper surface SLt for each of the multiple settlement-assumed layers SL. Furthermore, the assumed settlement difference value calculation unit 114 in the display control device 100 may calculate the assumed settlement difference value from the assumed settlement amounts at multiple assumed pile driving locations PP. In addition, the deformation angle calculation unit 115 in the display control device 100 may calculate the deformation angle of the foundation beam B from the calculated settlement difference value.

[0039] Figure 8 shows a first example of the information displayed by the display unit 30 in this embodiment. In this embodiment, the display control device 100 displays the arrangement of multiple settlement assumption layers SL, for example, as shown in Figure 8. In other words, for example, as shown in Figure 8, the display unit 30 may display the vertical arrangement of the ground surface and the multiple settlement-assuming layers SL as a diagram.

[0040] Figure 9 shows a second example of the information displayed by the display unit 30 in this embodiment. In this embodiment, the display control device 100 may display the estimated settlement amount by setting the intensity of the color according to the magnitude of the estimated settlement amount. In other words, for example, as shown in Figure 9, the display unit 30 may display the estimated settlement amounts of multiple piles P as a table. In this case, the intensity of the colors can be set according to the magnitude of the assumed settlement. For example, assumed settlements with relatively small values ​​may be displayed in lighter colors, and assumed settlements with relatively large values ​​may be displayed in darker colors. This allows users to intuitively grasp the magnitude or difference in magnitude of the expected settlement of multiple piles P through visual means.

[0041] Furthermore, among the multiple settlement-assimilating layers SL shown in Figure 8, the user can select an image of a settlement-assimilating layer SL, and a table like the one shown in Figure 9 may be displayed as a detailed representation of the selected settlement-assimilating layer SL. Specifically, for example, if the user wants to check the settlement amount of the first settlement-assimilating layer D1, the user selects an image of the first settlement-assimilating layer in the information shown in Figure 9. This may result in the display of a table like the one shown in Figure 9, showing the settlement amount of the selected first settlement-assimilating layer D1.

[0042] Furthermore, the display control device 100 may display the virtual ground model VG constructed by the ground model construction unit 112 on the display unit 30. This allows the user to visually understand the state of the geological layers underground, which are not normally visible, through the virtual ground model VG.

[0043] Figure 10 shows a third example of the information displayed by the display unit 30 in this embodiment. In this embodiment, the display control device 100 may display the deformation angle of the foundation beam B in correspondence with the assumed settlement amount of each of the multiple piles P. In other words, for example, as shown in Figure 10, the display unit 30 may display the deformation angles of multiple foundation beams B as a table. In this case, the intensity of the colors can be set according to the magnitude of the deformation angle of the foundation beam B. For example, deformation angles with relatively small values ​​may be displayed in lighter colors, and deformation angles with relatively large values ​​may be displayed in darker colors. This allows users to intuitively grasp the magnitude of the deformation angle of foundation beam B through visual means.

[0044] As described above, according to the settlement estimation method of this embodiment, first, the lower end point BPb and upper end point BPt of each of the multiple assumed settlement layers SL at multiple set positions BP are identified. Next, based on the information of the lower endpoint BPb and upper endpoint BPt of each of the multiple settlement-prone layers SL at the identified multiple setting locations BP, a virtual ground model VG including the multiple settlement-prone layers SL is constructed. Then, the estimated settlement amounts (total estimated settlement amount) at multiple assumed pile driving locations PP are calculated from the virtual ground model VG. In this way, by constructing a virtual ground model VG in advance based on the lower endpoint BPb and upper endpoint BPt of each of the multiple settlement-assuming layers SL at multiple set locations BP, the three-dimensional positions of the multiple settlement-assuming layers SL at locations other than the set locations BP can be accurately estimated. Therefore, by constructing the virtual ground model VG and then calculating the assumed settlement amount of the pile P, it is possible to accurately calculate the assumed settlement amount of the ground including the multiple settlement-assuming layers SL not only at the assumed pile-driving location PP that coincides with the set location BP, but also at the assumed pile-driving location PP that does not coincide with the set location BP. Therefore, it is possible to suppress unexpected settlement of piles P that may occur when the settlement amount is estimated only at a representative location within the ground G. Furthermore, it becomes easier to design the structure to allow for settlement of the piles P, thereby reducing design costs. It also helps to mitigate the cost increase that would result from increasing the number of piles P in a design that does not allow for settlement. Therefore, regardless of the number of layers expected to subside, it is possible to accurately estimate the amount of subsidence while keeping costs down.

[0045] Furthermore, according to another example of the settlement estimation method according to this embodiment, first, the lower end point BPb and upper end point BPt of each of the multiple assumed settlement layers SL at multiple set positions BP are identified. Next, a virtual ground model VG containing multiple settlement-prone layers SL is constructed by interpolating between the points BPb of the lower endpoints SLb of the settlement-prone layer SL at multiple set position BPs, and by interpolating between the points BPt of the upper endpoints SLt of each of the multiple settlement-prone layers SL at multiple set position BPs to generate the virtual upper surfaces SLt of each of the multiple settlement-prone layers SL. Then, the estimated settlement amount at multiple assumed pile driving locations PP is calculated from the virtual ground model VG. In this way, by generating virtual lower surfaces SLb and virtual upper surfaces SLt for each of the multiple settlement-assuming layers SL, a highly accurate virtual ground model VG including multiple settlement-assuming layers SL can be constructed. Then, by calculating the assumed settlement amount of the pile P, the assumed settlement amount at the assumed pile driving location PP can be calculated more accurately. Therefore, it is possible to more reliably suppress unexpected settlement of piles P that may occur when the settlement amount is estimated only at a representative location within the ground G. Furthermore, it becomes easier to design the structure to allow for settlement of the piles P, thereby reducing design costs and preventing the cost increase that would result from increasing the number of piles P in a design that does not allow for settlement. Therefore, regardless of the number of layers expected to subside, it is possible to accurately estimate the amount of subsidence while keeping costs down.

[0046] Furthermore, it is desirable that some of the multiple set position BPs coincide with multiple assumed pile driving position PPs. Alternatively, it is desirable that some of the multiple assumed pile driving position PPs coincide with multiple set position BPs. In other words, some or all of the multiple piles P are driven into the ground G at designated locations BP, where the lower end point BPb and upper end point BPt of each of the multiple settlement-prone layers SL are identified. This allows for a more accurate calculation of the expected settlement of the pile P driven at the designated location BP. Therefore, regardless of the number of layers expected to subside, it is possible to accurately estimate the amount of subsidence while keeping costs down.

[0047] Furthermore, some of the multiple set position BPs do not need to coincide with the multiple assumed pile driving position PPs. Alternatively, some of the multiple assumed pile driving position PPs do not need to coincide with the multiple set position BPs. By constructing a virtual ground model VG based on the results of a boring survey at the designated location BP, it is possible to accurately estimate the locations of multiple settlement-prone layers SL, and to accurately estimate the amount of settlement, even at the assumed pile-driving location PP, which is not actually surveyed (and is located at a different location from the designated location BP). Therefore, even if some of the multiple set position BPs do not coincide with the multiple assumed pile driving position PPs, it is possible to accurately estimate the amount of settlement regardless of the number of settlement layers, while also keeping costs down.

[0048] Furthermore, the interpolation between the lower endpoint BPb or upper endpoint BPt of each of the multiple assumed settlement layers SL at multiple set position BP is preferably performed as surface interpolation, where the space between each point is a curved surface. This allows for more accurate generation of the virtual lower surface SLb and virtual upper surface SLt for each of the multiple settlement-assumed layers SL, enabling the construction of a more accurate virtual ground model VG. Therefore, the expected settlement amount of the pile P at the assumed pile driving location PP can be calculated more accurately.

[0049] The surfaces used in surface interpolation can be generated, for example, using the Patch command in Grasshopper (AppliCraft Co., Ltd.). The Patch command creates an approximate patch surface from the input curves or point clouds. Furthermore, the surface precision can be adjusted by changing the spacing (Spans) and flexibility. In this embodiment, the point cloud consists of multiple lower endpoints BPb and multiple upper endpoints BPt of each assumed settlement layer SL, and the softness of the curved surface is adjusted by the spacing (Spans) and flexibility. By adjusting the softness of the curved surface, the shape of the surface can be adjusted to pass through each of the input point clouds (Points).

[0050] Furthermore, it is assumed that multiple settlement-prone layers SL will contain at least one of either a clay layer or a silt layer. This allows us to calculate the expected settlement of the pile P due to the clay or silt layer at the assumed pile driving location PP.

[0051] Furthermore, the identification of the lower endpoint BPb and upper endpoint BPt of each of the multiple assumed settlement layers SL at multiple designated locations BP should be done based on the boring log Bc. In this way, by repurposing the existing boring log Bc to identify the settlement-prone layer SL, the lower end point BPb and upper end point BPt of the settlement-prone layer SL can be identified without any special work. Therefore, it is possible to suppress the increase in costs that would otherwise be incurred due to investigations of the ground G, etc.

[0052] Furthermore, at multiple setting locations BP, the vertical length Z of each assumed settlement layer SL is preferably divided into multiple reference lengths X and one fractional length Y that is shorter than the reference length X. In this way, by using a reference length, it becomes easier to compare the vertical length Z of each assumed settlement layer SL between multiple set positions BP.

[0053] Furthermore, according to the building reinforcement method of this embodiment, first, the relative settlement difference value is calculated from the assumed settlement amount at multiple assumed pile driving locations PP. Next, the additional stress generated in the foundation beam B is calculated from the assumed settlement difference values ​​at multiple assumed pile driving locations PP. Then, the placement of reinforcing bars is determined according to the added stress. In other words, the arrangement of reinforcing bars, such as density and number, is determined according to the additional stress on the foundation beam B, which is estimated from the estimated settlement amount at multiple assumed pile-driving locations PP. This makes it easier for the foundation beam B to resist the additional stress caused by the settlement of multiple piles P. Furthermore, by more accurately reinforcing the foundation beam B, it is possible to suppress the increase in costs that would result from over-reinforcing the building.

[0054] Furthermore, the assumed settlement of pile P should be estimated using a settlement estimation method relating to any of the above embodiments. In other words, the arrangement of reinforcing bars, including their density and number, is determined according to the additional stress on the foundation beam B calculated from the settlement of pile P, which is assumed by one of the methods described above. This allows for accurate assessment of the additional stress generated in foundation beam B, enabling precise reinforcement of foundation beam B. Therefore, the foundation beam B can be made more resistant to the additional stress caused by the settlement of multiple piles P.

[0055] Furthermore, the display control device 100 according to this embodiment includes: a double-ended point identification unit 111 that identifies the lower end point BPb and upper end point BPt of each of the multiple settlement assumption layers SL at multiple set position BP; a ground model construction unit 112 that constructs a virtual ground model VG including the multiple settlement assumption layers SL; and an assumed settlement amount display control unit 113 that displays the assumed settlement amount of each of the multiple settlement assumption layers SL at multiple pile driving assumption positions PP on the display unit 30 from the virtual ground model VG. In this way, the display control device 100 can construct a virtual ground model VG in the ground model construction unit 112. Furthermore, it can estimate the expected settlement amount for each of the multiple settlement-prone layers SL at multiple assumed pile driving locations PP from the virtual ground model VG. In addition, the expected settlement amount for each of the settlement-prone layers SL can be displayed on the display unit. With the configuration described above, the virtual ground model VG can accurately estimate the placement of multiple settlement-prone layers SL outside of the set position BP. Therefore, the estimated settlement amount for each of the multiple settlement-prone layers SL at multiple pile-driving position PP can be accurately estimated, and the estimated settlement amount at pile-driving position PP can be accurately estimated. Thus, settlement can be accurately estimated regardless of the number of settlement-prone layers. Furthermore, by displaying the estimated settlement amount for each settlement-prone layer SL on the display unit, the user can understand the estimated settlement amount for each settlement-prone layer SL.

[0056] Furthermore, the display control device 100 includes: a endpoint identification unit 111 that identifies the lower endpoint BPb and upper endpoint BPt of each of the multiple settlement assumption layers SL at multiple set position BPs; a ground model construction unit 112 that constructs a virtual ground model VG including multiple settlement assumption layers SL by interpolating between the points of the lower endpoint BPb of each of the multiple settlement assumption layers SL at multiple set position BPs to generate a virtual lower surface SLb for each of the multiple settlement assumption layers SL, and by interpolating between the points of the upper endpoint BPt of each of the multiple settlement assumption layers SL at multiple set position BPs to generate a virtual upper surface SLt for each of the multiple settlement assumption layers SL; and an assumed settlement amount display control unit 113 that displays the assumed settlement amount for each of the multiple settlement assumption layers SL at multiple pile driving assumption positions PP on the display unit 30 from the virtual ground model VG. With this configuration, the ground model construction unit 112 generates virtual lower surfaces SLb and virtual upper surfaces SLt for each of the multiple settlement assumption layers, thereby enabling the construction of a more accurate virtual ground model VG. As a result, the assumed settlement amount for each of the multiple settlement assumption layers SL at multiple pile driving assumption locations PP can be accurately estimated, and the assumed settlement amount at the pile driving assumption location PP can be accurately estimated. Therefore, settlement can be accurately estimated regardless of the number of settlement assumption layers. Furthermore, by displaying the assumed settlement amount for each settlement assumption layer SL on the display unit, the user can understand the assumed settlement amount for each settlement assumption layer SL.

[0057] Furthermore, the display control device 100 may set the intensity of the color according to the assumed settlement amount of the pile P and display it on the display unit 30. This makes it easier for users to intuitively grasp the expected settlement amount of pile P visually.

[0058] Furthermore, the display control device 100 should display the deformation angle of the foundation beam B in correspondence with the assumed settlement amount of the pile P. This makes it easier for users to determine whether the expected deformation angle of foundation beam B is within the acceptable range.

[0059] Furthermore, the system may include an estimated settlement difference calculation unit 114 that calculates an estimated settlement difference value from the estimated settlement amounts at multiple assumed pile driving locations PP, and a deformation angle calculation unit 115 that calculates the deformation angle of the foundation beam from the estimated settlement difference value, and the estimated settlement amount display control unit 113 may display the deformation angle in correspondence with the estimated settlement amount. With this configuration, users can easily understand the relationship between the expected settlement amount and the deformation angle.

[0060] The technical scope of this disclosure is not limited to the embodiments described above, and various modifications can be made without departing from the spirit of this disclosure. For example, although it was explained that the display unit 30 sets the intensity of the color according to the assumed settlement amount of the pile P and the deformation angle of the foundation beam B, the brightness of the color may also be set. That is, for example, if the assumed settlement amount or the deformation angle of the foundation beam B is a relatively large value, it is displayed in a bright color, and if the assumed settlement amount or the deformation angle of the foundation beam B is a relatively small value, it is displayed in a dark color. Alternatively, the colors themselves could be changed for display. For example, if the assumed settlement amount or the deformation angle of foundation beam B is a relatively large value, it could be displayed in red, and if the assumed settlement amount or the deformation angle of foundation beam B is a relatively small value, it could be displayed in blue. Alternatively, for example, the display unit 30 may display a virtual ground model VG, and the estimated settlement amount of each pile P and the deformation angle of the foundation beam B may be displayed in the parts corresponding to the locations where multiple piles P and foundation beam B are installed.

[0061] Furthermore, it is possible to replace the components in the above embodiments with well-known components as appropriate, without departing from the spirit of this disclosure, and the above-described modifications may be combined as appropriate. [Explanation of Symbols]

[0062] 10 processors 20 memory 30 Display section 100 Display control device 110 Control Unit 111 Endpoint Identification Section 112 Ground Model Construction Department 113 Estimated Settlement Amount Display Control Unit 114 Unit for calculating assumed settlement difference 115 Deformation Angle Calculation Unit B Foundation beam Bc Borehole Log BP setting position BP1 1st setting position BP2 2nd setting position BP3 Third setting position BP4 4th setting position BP5 5th setting position BP6 6th setting position BPb lower end point BPt upper end point G Ground P pile PP assumed position SL subsidence assumed layer D1 First subsidence prediction layer D2 Second subsidence prediction layer D3 Third subsidence prediction layer SLb virtual bottom surface SLt virtual top surface VG Virtual Ground Model X standard length Y fractional length Z: Vertical length of the assumed subsidence layer

Claims

1. A step of identifying the lower and upper endpoints of each of the multiple assumed settlement layers at multiple set locations, The steps include constructing a virtual ground model that includes the aforementioned multiple settlement assumption layers, The steps include calculating the assumed settlement amount in each of the multiple assumed settlement layers at multiple assumed pile driving locations from the virtual ground model, A method for estimating settlement, including the amount of settlement.

2. The virtual ground model is constructed by interpolating the intervals between the lower endpoints of each of the multiple settlement-assuming layers at the multiple set locations to generate a virtual lower surface for each of the multiple settlement-assuming layers, and by interpolating the intervals between the upper endpoints of each of the multiple settlement-assuming layers at the multiple set locations to generate a virtual upper surface for each of the multiple settlement-assuming layers. The method for estimating settlement amount according to claim 1.

3. Some of the above-mentioned multiple setting positions coincide with the above-mentioned multiple assumed pile driving positions, Alternatively, some of the aforementioned multiple assumed pile driving locations coincide with the aforementioned multiple set locations. The method for estimating settlement amount according to claim 1.

4. Some of the aforementioned multiple setting positions do not coincide with the aforementioned multiple assumed pile driving positions. Alternatively, some of the aforementioned multiple assumed pile driving locations do not coincide with the aforementioned multiple set locations. The method for estimating settlement amount according to claim 1.

5. The interpolation between the aforementioned points is a surface interpolation, where the space between each point is a curved surface. The method for estimating settlement amount according to claim 2.

6. The aforementioned multiple settlement-prone layers include at least one of a clay layer and a silt layer. The method for estimating settlement amount according to claim 1.

7. The identification of the lower and upper endpoints of each of the multiple assumed settlement layers at the multiple designated locations is performed based on boring log diagrams. The method for estimating settlement amount according to claim 1.

8. The vertical length of each of the aforementioned multiple settlement-prone layers is divided into multiple reference lengths and one fractional length shorter than the reference length. The method for estimating settlement amount according to claim 1.

9. A method for reinforcing a building, comprising reinforcing the building based on the assumed settlement amount estimated by the settlement amount estimation method described in any one of claims 1 to 8.

10. A terminal point identification unit that identifies the lower and upper endpoints of each of the multiple settlement assumption layers at multiple set locations, A ground model construction unit that constructs a virtual ground model including the aforementioned multiple settlement assumption layers, The system includes a hypothetical settlement amount display control unit that displays the hypothetical settlement amount for each of the multiple settlement-prone layers at multiple assumed pile-driving locations from the virtual ground model. Display control device.

11. The ground model construction unit generates a virtual lower surface for each of the multiple settlement assumption layers by interpolating the distance between the lower endpoints of each of the multiple settlement assumption layers at the multiple set positions, and generates a virtual upper surface for each of the multiple settlement assumption layers by interpolating the distance between the upper endpoints of each of the multiple settlement assumption layers at the multiple set positions, thereby constructing a virtual ground model including the multiple settlement assumption layers. The display control device according to claim 10.

12. The estimated settlement amount display control unit sets and displays the intensity of the color according to the estimated settlement amount. The display control device according to claim 10 or claim 11.

13. An assumed settlement difference value calculation unit calculates an assumed settlement difference value from the assumed settlement amounts at the plurality of assumed pile driving locations, The system further includes a deformation angle calculation unit that calculates the deformation angle of the foundation beam from the assumed settlement difference value, The assumed settlement amount display control unit displays the assumed settlement amount in association with the deformation angle. The display control device according to claim 10 or claim 11.

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