Method for determining the shape of a retaining wall

Abstract

This invention provides a method for determining the shape of a retaining wall that can reduce the number of days required for the process from excavation to the construction of the retaining wall. [Solution] A retaining wall shape determination method for determining the shape of a retaining wall constituting a riverbank comprises: a preparation step of preparing a portable terminal capable of acquiring initial information including the height of the top of the revetment and the riverbed height at at least one planned crossing point of the river; an excavation step of excavating the planned installation site of the retaining wall at at least one planned crossing point to acquire excavation information including the depth at which bedrock appears; and a retaining wall shape output step of inputting the excavation information to the terminal so that the terminal outputs the shape of the retaining wall. The terminal includes a retaining wall shape determination unit that determines the bottom height of the retaining wall at at least one planned crossing point from the riverbed height and the excavation information, and determines the shape of the retaining wall from the height of the top of the revetment and the bottom height.

Description

Technical Field

[0001] The present disclosure relates to a retaining wall shape determination method for determining the shape of a retaining wall that constitutes a riverbank.

Background Art

[0002] Conventionally, before constructing a retaining wall on a river, the ground conditions (for example, the depth of bedrock, etc.) are confirmed by performing floor excavation on site, and the shape of the retaining wall (the height, thickness, foundation type, etc. of the retaining wall) suitable for these ground conditions is determined. Then, drawings (construction drawings, quantity calculation drawings, etc.) reflecting the determined shape of the retaining wall are created. Workers at the site construct the retaining wall on the river as shown in the drawings.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] Generally, the structural dimensions and shape of a retaining wall are designed and constructed according to the detailed ground conditions at the retaining wall installation location. Therefore, when construction starts in a situation where the detailed ground conditions at the site are unknown, it is necessary to arrange the steps in the order of on-site ground condition confirmation (the person in charge of on-site construction confirms the ground conditions at the retaining wall installation location), retaining wall structure design and drawing (the person in charge of design determines the structural dimensions and shape of the retaining wall reflecting the results of on-site ground condition confirmation), and on-site retaining wall construction (the person in charge of on-site construction constructs the retaining wall according to the drawing of the retaining wall structure design). In this case, since a plurality of persons in charge are responsible for each step separately, the number of working days increases. Note that Patent Document 1 only discloses the construction procedure of the retaining wall.

[0005] This disclosure has been made in view of the above-mentioned problems and aims to provide a method for determining the shape of a retaining wall that can reduce the number of days required for the process from excavation to the construction of the retaining wall. [Means for solving the problem]

[0006] To achieve the above objective, the retaining wall shape determination method according to the present disclosure is a retaining wall shape determination method for determining the shape of a retaining wall constituting a riverbank, comprising: a preparation step of preparing a portable terminal capable of acquiring initial information including the height of the top of the revetment and the riverbed height at at least one planned crossing location of the river; an excavation step of excavating the planned installation location of the retaining wall at the at least one planned crossing location and acquiring excavation information including the depth to which bedrock appears; and a retaining wall shape output step of inputting the excavation information to the terminal so that the terminal outputs the shape of the retaining wall, wherein the terminal includes a retaining wall shape determination unit that determines the bottom height of the retaining wall at the at least one planned crossing location from the riverbed height and the excavation information, and determines the shape of the retaining wall from the height of the top of the revetment and the bottom height. [Effects of the Invention]

[0007] According to the retaining wall shape determination method of this disclosure, the number of days required from excavation to construction of the retaining wall can be reduced. [Brief explanation of the drawing]

[0008] [Figure 1] This is a flowchart of a retaining wall shape determination method according to one embodiment. [Figure 2] This is a top view of the river where the retaining wall will be constructed. [Figure 3] This is a diagram illustrating initial information according to one embodiment. [Figure 4] This is a schematic functional block diagram of a terminal according to one embodiment. [Figure 5] This diagram illustrates an example of how to input excavation data into a terminal. [Figure 6]This is a flowchart showing how the retaining wall shape determination unit according to one embodiment determines the shape of the retaining wall. [Figure 7] This is a flowchart showing how the retaining wall shape determination unit according to one embodiment determines the shape of the retaining wall. [Figure 8] This is a flowchart showing how the retaining wall shape determination unit according to one embodiment determines the shape of the retaining wall. [Figure 9] This diagram schematically shows the first type of rock mass anchoring shape. [Figure 10] This diagram schematically shows the first type of sediment anchorage. [Figure 11] This figure shows an example of a situation where construction drawings are being output to a terminal. [Modes for carrying out the invention]

[0009] The method for determining the shape of a retaining wall according to an embodiment of this disclosure will be described below with reference to the drawings. This embodiment represents one aspect of this disclosure and is not limiting, and can be modified at will within the scope of the technical idea of ​​this disclosure.

[0010] <Method for determining retaining wall shape> (method) The retaining wall shape determination method according to this disclosure is a method for determining the shape of a retaining wall that constitutes a riverbank. Figure 1 is a flowchart of the retaining wall shape determination method according to one embodiment. As shown in Figure 1, the retaining wall shape determination method includes a preparation step S1, an excavation step S2, and a retaining wall shape output step S3.

[0011] In preparation step S1, a portable terminal 2 is prepared that can acquire initial information X1, including the revetment crest height Hw and riverbed height Hr at the planned crossing point P of the river 100. Furthermore, in preparation step S1, this terminal 2 is transported to the construction site of the retaining wall 50.

[0012] The terminal 2 includes a display screen 3 and is, for example, a smartphone or a tablet. The terminal 2 includes a processor such as a CPU or a GPU (not shown), a memory such as a ROM or a RAM, and an I / O interface. The terminal 2 realizes each functional unit included in the terminal 2 by the operation (such as calculation) of the processor according to the instructions of the program loaded in the memory. In one embodiment, the terminal 2 is configured to be able to acquire cross-sectional shape information SX including the cross-sectional shape S of the current situation at the planned crossing position P. The cross-sectional shape information SX may include, in addition to the cross-sectional shape S of the current situation, the date when the cross-sectional shape S of the current situation was acquired, and the like.

[0013] The cross-sectional shape S of the current situation will be described. FIG. 2 is a top view of the river 100 where the retaining wall 50 is to be constructed. In the form illustrated in FIG. 2, a retaining wall 50 is planned to be constructed on one bank 102 of the river 100, and the river 100 includes a plurality of planned crossing positions P along the extension direction Dr of the river 100. The planned crossing position P of the river 100 is a position where a cross-sectional view of the river 100 (a view of the cross-section obtained by cutting the river 100 perpendicular to the center line O of the river 100) is created. This cross-sectional view of the river is the cross-sectional shape S of the current situation (see FIG. 3). Note that the extension direction Dr is the direction in which the center line O of the river 100 extends.

[0014] In one embodiment, the plurality of planned crossing positions P include a first planned crossing position P1(P) and a second planned crossing position P2(P). The second planned crossing position P2 follows the first planned crossing position P1 in the extension direction Dr of the river 100. That is, no other planned crossing position P is formed between the second planned crossing position P2 and the first planned crossing position P1. The first planned crossing position P1 includes the inflection point 104 of the center line O of the river 100.

[0015] In one embodiment, the multiple planned crossing points P further include a third planned crossing point P3(P) located on the opposite side of the first planned crossing point P1, with the second planned crossing point P2 in the longitudinal direction Dr of the river 100. The third planned crossing point P3 follows the second planned crossing point P2 in the longitudinal direction Dr of the river 100. In some embodiments, the multiple planned crossing points P are provided at predetermined lengths, such as 20m, which is the distance between measurement points.

[0016] Initial information X1 according to one embodiment will be described. Figure 3 is a diagram illustrating initial information X1 according to one embodiment, and is a part of a cross-sectional view of the river 100 at a first planned cross-sectional location P1. In Figure 3, reference numeral 4 denotes the top of the revetment, reference numeral 6 denotes the riverbed, and reference numeral 8 denotes the ground line formed by the surface of the ground (existing cross-sectional shape S) including the sediment 9. In one embodiment, initial information X1 includes the top of the revetment 4 and the riverbed 6. The top of the revetment 4 is a road whose dimensions and installation position are predetermined, and is, for example, placed on a support 10 formed by an embankment E. Backfill crushed stone 16 is formed between the retaining wall 50 and the support 10. Furthermore, the retaining wall 50 is embedded by backfilling 18. In Figure 3, the dotted line represents a structure planned to be constructed on the existing river 100. The structure also includes an embankment E, and initial information X1 may further include the support 10.

[0017] The height Hw of the top edge of the revetment is the length D1 in the vertical direction from the top edge 4 of the revetment to the control point CP indicating the installation position of the retaining wall 50. More specifically, the height Hw of the top edge of the revetment is the height from the control point CP to the surface of the road. The control point CP is the position of the lower end of the inner wall surface 51 on the side opposite to the side of the backfill crushed stone 16 of the retaining wall 50. The control point CP is located at a predetermined depth (for example, 1 m below the riverbed 6) from the riverbed 6. A virtual line 7 extending in the left-right direction D2 (a direction orthogonal to the vertical direction D1) from the control point CP toward the center line O of the river 100 is defined as the fixing position Q where it overlaps with the natural ground line 8 or the bedrock line 14 described later, and the length of the left-right direction D2 from the control point CP to the fixing position Q is defined as the margin width W. The position of the control point CP in the left-right direction D2 is a position where the margin width W is equal to or greater than the length of the width required in design when the virtual line 7 overlaps with the natural ground line 8, and the margin width W is, for example, 1.5 m.

[0018] The riverbed height Hr is the length D1 in the vertical direction from the preset reference plane to the riverbed 6. In one embodiment, the surface of the road is the reference plane. In some embodiments, the riverbed 6 is the planned riverbed 6a(6) or the deepest riverbed 6b(6). The planned riverbed 6a is a riverbed formed by the deposition of sand or the like on the deepest riverbed 6b and is located above the deepest riverbed 6b.

[0019] In the floor excavation step S2, as illustrated in FIG. 3, a part of the planned installation location 19 of the retaining wall 50 at the first planned cross-sectional position P1 is floor-excavated. And in the floor excavation step S2, floor excavation information X2 including the depth (hereinafter referred to as the bedrock depth Hb) at which the bedrock 15 appears from the top edge 4 of the revetment is acquired. Specifically, the bedrock depth Hb is the elevation of the surface of the bedrock 15. The bedrock line 14 formed by the surface of the bedrock 15 exists below the natural ground line 8. In some embodiments, the floor excavation information X2 includes the bedrock depth Hb and the bedrock line 14. Note that the bedrock 15 is located below the natural ground and is harder than the natural ground.

[0020] In one embodiment, as illustrated in Figure 3, the excavation step S2 involves excavating from the ground line 8 included in the planned installation location 19 to a predetermined depth from the riverbed 6. This predetermined depth is, for example, 1 m, and the excavation is carried out to the depth of the control point CP. However, in this excavation step S2, the excavation has not reached the bedrock 15, so the bedrock depth Db = unknown is obtained. In some embodiments, the excavation step S2 is carried out with an upper limit of the depth required for the design (for example, 2.5 m) beyond the deepest riverbed 6b. In some embodiments, the excavation step S2 is carried out until bedrock 15 is encountered.

[0021] In the retaining wall shape output step S3, the terminal 2 outputs the shape of the retaining wall 50 by inputting the excavation information X2. The functional parts of the terminal 2 will be described with reference to Figure 4. Figure 4 is a schematic functional block diagram of the terminal 2 according to one embodiment. As illustrated in Figure 4, the terminal 2 includes an information acquisition unit 30, an excavation information input unit 31, a retaining wall shape determination unit 32, a construction drawing output unit 34, and a construction quantity calculation unit 36.

[0022] The information acquisition unit 30 is not particularly limited as long as it can acquire cross-sectional shape information SX and initial information X1. For example, it may acquire at least one of the cross-sectional shape information SX and initial information X1 from outside the terminal 2 via a communication network such as the Internet, or it may acquire at least one of the cross-sectional shape information SX and initial information X1 by having the user input them via an input form displayed on the display screen 3. In other words, the terminal 2 may acquire at least one of the cross-sectional shape information SX and initial information X1 from a public service, or it may acquire at least one of the cross-sectional shape information SX and initial information X1 from the measurement results of the workers constructing the retaining wall 50.

[0023] Figure 5 is a diagram illustrating an example of how to input excavation information X2 into terminal 2. As illustrated in Figure 5, the excavation information input unit 31 displays input fields 20 on the display screen 3 of terminal 2, where excavation information X2 can be entered at the site. The input fields 20 are displayed for each planned cross-section P and include a checkbox 40 for selecting an arbitrary planned cross-section P, and a text box 42 for directly entering the location of the excavation information file containing the excavation information X2. When a planned cross-section P is selected by the checkbox 40, and the location of the excavation information file for this planned cross-section P is entered in the text box 42, the worker at the site presses the output button 44, and the construction drawing 60 is output to the display screen 3 of terminal 2 (see Figure 11). The following describes the process until the construction drawing 60 is output to the display screen 3 of terminal 2 (the operation of the retaining wall shape determination unit 32, the construction drawing output unit 34, and the construction quantity calculation unit 36).

[0024] The retaining wall shape determination unit 32 determines the bottom height Hs of the retaining wall 50 at the first planned cross-sectional position P1 from the riverbed height Hr and the excavation information X2. Furthermore, the retaining wall shape determination unit 32 determines the shape of the retaining wall 50 from the revetment top height Hw and the bottom height Hs. The shape of the retaining wall 50 according to this disclosure includes not only the shape of the retaining wall 50 itself (dimensions such as width w and height h, which will be described later), but also information for installing the retaining wall 50, such as the type of foundation (rock anchoring or sediment anchoring, presence or absence of replacement concrete, etc.). The bottom height Hs is the height at which the bottom surface 53 of the retaining wall 50 is located.

[0025] In one embodiment, the retaining wall shape determination unit 32 is configured to determine a control point CP from cross-sectional shape information SX, excavation information X2, and riverbed height Hr.

[0026] In one embodiment, the retaining wall shape determination unit 32 determines the shape of the retaining wall 50 to be anchored to the bedrock 15 when the depth at which the bedrock 15 appears is known, and determines the shape of the retaining wall 50 to be anchored to the sedimentary soil 9 when the depth at which the bedrock 15 appears is unknown.

[0027] An example of the flow by which the retaining wall shape determination unit 32 determines the shape of the retaining wall 50 will be described. Figures 6 to 8 are flowcharts of the retaining wall shape determination unit 32 determining the shape of the retaining wall 50 according to one embodiment. This flowchart starts when the output button 44 is pressed. As illustrated in Figure 6, in the first step S101 of the retaining wall shape determination unit 32, it checks whether the bedrock 15 appears within 8m from the top of the revetment 4 based on the riverbed height Hr and the excavation information X2. If the bedrock 15 appears (S101: Yes), the retaining wall shape determination unit 32 determines a control point CP 0.5m below the planned riverbed 6a based on the cross-sectional shape information SX, the excavation information X2, and the riverbed height Hr. Then, the retaining wall shape determination unit 32 determines the shape of the retaining wall 50 to a first bedrock anchoring shape A1 that anchors the retaining wall 50 to the bedrock 15 based on the top of the revetment height Hw and the bottom height Hs. On the other hand, if bedrock 15 does not appear (S101: No), proceed to the second step S102. Note that, before excavation, the control point CP's position is not yet determined, but it can be estimated in advance that it is within the range (on a linear plane) determined by the width and height of the road and the slope of the retaining wall 50.

[0028] In the second step S102 of the retaining wall shape determination unit 32, it is confirmed whether it is possible to determine a control point CP that is at or above a predetermined depth from the planned riverbed 6a (for example, 1 m or more below the planned riverbed 6a) and whose clearance width W is the size required for design (for example, 1.5 m or more). If it is possible to determine this control point CP (S102: Yes), the retaining wall shape determination unit 32 determines the control point CP that is at a predetermined depth from the planned riverbed 6a (for example, 1 m below the planned riverbed 6a) and whose clearance width W is the size required for design, based on the cross-sectional shape information SX, the excavation information X2, and the riverbed height Hr. Then, the retaining wall shape determination unit 32 determines the shape of the retaining wall 50 to a first sediment anchoring shape B1 for anchoring the retaining wall 50 to the sediment 9 based on the revetment top height Hw and bottom height Hs. On the other hand, if it is not possible to determine this control point CP (S102: No), the process proceeds to the third step S103 illustrated in Figure 7.

[0029] As illustrated in Figure 7, in the third step S103 of the retaining wall shape determination unit 32, it is confirmed whether or not the bedrock 15 appears below 8m from the top of the revetment 4. If the bedrock 15 appears (S103: Yes), the retaining wall shape determination unit 32 determines a control point CP 0.5m below the planned riverbed 6a based on the cross-sectional shape information SX, the excavation information X2, and the riverbed height Hr. Then, the retaining wall shape determination unit 32 determines the shape of the retaining wall 50 to be a second bedrock anchoring shape A2 that anchors the retaining wall 50 to the bedrock 15 based on the top of the revetment Hw and the bottom height Hs. On the other hand, if the bedrock 15 does not appear below 8m from the top of the revetment 4 (S102: No), the process proceeds to the fourth step S104.

[0030] In the fourth step S104 of the retaining wall shape determination unit 32, it is confirmed whether it is possible to determine a control point CP that is at or above a predetermined depth from the planned riverbed 6a (for example, 1 m or more below the planned riverbed 6a) and whose allowance width W is the size required for design. If it is possible to determine this control point CP (S104: Yes), the retaining wall shape determination unit 32 determines a control point CP that is at a predetermined depth from the planned riverbed 6a (for example, 1 m below the planned riverbed 6a) and whose allowance width W is the size required for design (for example, 1.5 m or more) based on the cross-sectional shape information SX, the excavation information X2, and the riverbed height Hr. Then, the retaining wall shape determination unit 32 determines the shape of the retaining wall 50 to a second sediment anchoring shape B2 that anchors the retaining wall 50 to the sediment 9 based on the revetment top height Hw and bottom height Hs. On the other hand, if it is not possible to determine this control point CP (S104: No), the process proceeds to the fifth step S105 illustrated in Figure 8.

[0031] As illustrated in Figure 8, in the fifth step S105 of the retaining wall shape determination unit 32, it is confirmed whether or not bedrock 15 appears from the deepest riverbed 6b to a predetermined depth (for example, 1 m below the deepest riverbed 6b). If bedrock 15 appears (S105: Yes), the retaining wall shape determination unit 32 determines a control point CP at a predetermined depth from the deepest riverbed 6b (for example, 1 m below the deepest riverbed 6b) based on the cross-sectional shape information SX, the excavation information X2, and the riverbed height Hr. Then, the retaining wall shape determination unit 32 determines the shape of the retaining wall 50 to a third bedrock anchoring shape A3 that anchors the retaining wall 50 to bedrock 15 based on the revetment top height Hw and bottom height Hs. On the other hand, if bedrock 15 does not appear (S105: No), the process proceeds to the sixth step S106.

[0032] In the sixth step S106 of the retaining wall shape determination unit 32, it is confirmed whether the bedrock 15 appears at a predetermined depth (for example, 1 m below the deepest riverbed 6b) or more from the deepest riverbed 6b, and within the depth required for design (for example, 2.5 m). If the bedrock 15 appears (S106: Yes), the retaining wall shape determination unit 32 determines a control point CP at a predetermined depth (for example, 1 m below the deepest riverbed 6b) from the cross-sectional shape information SX, the excavation information X2, and the riverbed height Hr. Then, the retaining wall shape determination unit 32 determines the shape of the retaining wall 50 to a fourth bedrock anchoring shape A4 that anchors the retaining wall 50 to the bedrock 15, based on the revetment top height Hw and bottom height Hs. On the other hand, if bedrock 15 does not appear (S106: No), the retaining wall shape determination unit 32 determines a control point CP at a predetermined depth from the deepest riverbed 6b (for example, 1 m below the deepest riverbed 6b) based on the cross-sectional shape information SX, the excavation information X2, and the riverbed height Hr. Then, the retaining wall shape determination unit 32 determines the shape of the retaining wall 50 to a third sedimentary soil anchoring shape B3 that anchors the retaining wall 50 to the sedimentary soil 9 based on the revetment top height Hw and bottom height Hs.

[0033] The first rock mass anchoring shape A1 to the fourth rock mass anchoring shape A4 will be described. Figure 9 is a schematic diagram showing the first rock mass anchoring shape A1.

[0034] As illustrated in Figure 9, the first rock mass anchoring shape A1 includes the vertical length D1 (height h) and horizontal length D2 (width w) of the retaining wall 50 itself, and the inclination of the inner wall surface 51 (angle of inclination θ of the inner wall surface 51 with respect to the bottom surface 53). The width w is determined according to the height Hw of the top of the revetment. For example, if the height Hw of the top of the revetment is less than 8m, the width w is 1.1m; if the height Hw of the top of the revetment is 8m or more and less than 8.5m, the width w is 2.1m; if the height Hw of the top of the revetment is 8.5m or more and less than 9.5m, the width w is 2.3m; and if the height Hw of the top of the revetment is 9.5m or more and less than 10.5m, the width w is 2.6m. In one embodiment, the first rock mass anchoring shape A1 includes backfill crushed stone 16 and backfill 18. Note that the first rock mass anchoring shape A1 is not limited to the form illustrated in Figure 9.

[0035] Although not shown, the second rock mass anchoring configuration A2 has a retaining wall 50 with a greater height h and width w than the first rock mass anchoring configuration A1. In the third rock mass anchoring configuration A3, the foundation concrete of the retaining wall 50 rests on the rock mass 15. In the fourth rock mass anchoring configuration A4, replacement concrete is provided below the retaining wall 50, and the lower end of the retaining wall 50 is buried by embankment E. Note that the second to fourth rock mass anchoring configurations A2 to A4 may include backfill crushed stone 16 and backfill 18.

[0036] The first sediment anchoring shape B1 to the third sediment anchoring shape B3 will be described. Figure 10 is a schematic diagram showing the first sediment anchoring shape B1.

[0037] As illustrated in Figure 10, the first sediment anchoring shape B1 includes the height h of the retaining wall 50, the width w of the retaining wall 50, and the inclination angle θ of the inner wall surface 51. In one embodiment, the first sediment anchoring shape B1 includes backfill crushed stone 16 and backfill 18. The first sediment anchoring shape B1 includes a region 55 (colored portion in Figure 10) from which the sediment 9 is removed from the natural ground. Note that the first sediment anchoring shape B1 is not limited to the form illustrated in Figure 10.

[0038] The construction drawing output unit 34 outputs a construction drawing 60 to the terminal 2, which superimposes the retaining wall 50 onto the existing cross-sectional shape S using control points CP. Figure 11 shows an example of the state in which the construction drawing 60 is output to the terminal 2. As described above, when the output button 44 is pressed, the retaining wall shape determination unit 32 determines the shape of the retaining wall 50 and the control points CP. The construction drawing output unit 34 then identifies the portion of the existing cross-sectional shape S that corresponds to the location of the determined control points CP. Next, the construction drawing output unit 34 creates the construction drawing 60 by superimposing the determined shape of the retaining wall 50 onto this identified portion. Then, as illustrated in Figure 11, the construction drawing output unit 34 displays the construction drawing 60 on the display screen 3 of the terminal 2. In the configuration illustrated in Figure 11, when the output button 44 is pressed, an output field 62 showing the shape (result) of the retaining wall 50 for each planned cross-sectional position P is displayed on the display screen 3 of the terminal 2. Then, when you select the row for the planned cross-sectional location P in this output field 62 to check the construction drawing 60, the construction drawing 60 to be checked will be displayed at the bottom of the output field 62.

[0039] The construction quantity calculation unit 36 ​​calculates the construction quantity 70 for constructing the retaining wall 50 from the first planned cross-section P1 to the second planned cross-section P2, based on the shape of the retaining wall 50 at the first planned cross-section P1 and the shape of the retaining wall 50 at the second planned cross-section P2. The method for calculating the construction quantity 70 is not particularly limited, and for example, the average cross-section method can be used. In the configuration illustrated in Figure 11, the construction quantity 70 from the first planned cross-section P1 to the second planned cross-section P2, and the construction quantity 70 from the second planned cross-section P2 to the third planned cross-section P3 are displayed.

[0040] (Effects / Actions) The operation and effects of a retaining wall shape determination method according to one embodiment will be described. According to one embodiment, a terminal 2 is brought to the site where the retaining wall 50 will be constructed, and excavation information X2 obtained by excavating the planned installation location 19 of the retaining wall 50 is input to the terminal 2 at the site. The terminal 2 then automatically selects an appropriate retaining wall shape according to the initial information X1 and the excavation information X2. The display screen 3 of the terminal 2 then displays a construction drawing 60 that reflects the appropriate retaining wall shape 50. As a result, the construction drawing 60 can be quickly obtained at the site after the excavation is completed. Therefore, the number of days required from the completion of the excavation to the construction of the retaining wall 50 can be reduced. Furthermore, since the display screen 3 of the terminal 2 displays the construction quantity 70 that reflects the excavation information X2, this construction quantity 70 can also be quickly obtained at the site. It is also advantageous that the construction quantity 70 can be obtained with high accuracy because the excavation information X2 is reflected in the construction quantity 70.

[0041] According to one embodiment, the retaining wall shape determination unit 32 is configured to determine the control point CP, so that the installation position of the retaining wall 50 on the current cross-sectional shape S at the planned cross-sectional position P can be determined.

[0042] The contents described in each of the above embodiments can be understood, for example, as follows:

[0043] [1] The retaining wall shape determination method relating to this disclosure is a retaining wall shape determination method for determining the shape of a retaining wall (50) that constitutes the revetment of a river (100), Preparation step (S1) involves preparing a portable terminal (2) capable of acquiring initial information (X1) including the height of the revetment crest (Hw) and the riverbed height (Hr) at at least one planned crossing location (P) of the river, Excavation step (S2) involves excavating the planned location (19) of the retaining wall at at least one planned cross-sectional location to obtain excavation information (X2) including the depth (Db) at which bedrock (15) appears, The system includes a retaining wall shape output step (S3) in which the terminal outputs the shape of the retaining wall by inputting the excavation information, The aforementioned terminal is The system includes a retaining wall shape determination unit (32) that determines the bottom height (Hs) of the retaining wall at at least one planned cross-sectional location from the riverbed height and the excavation information, and also determines the shape of the retaining wall from the revetment top height and the bottom height.

[0044] According to the method described in [1] above, a terminal is brought to the construction site of the retaining wall, and the excavation information obtained by excavating the planned location of the retaining wall is entered into the terminal on-site, thereby quickly obtaining the shape of the retaining wall on-site. As a result, the number of days required from excavation to construction of the retaining wall can be reduced.

[0045] [2] In some embodiments, the method described in [1] above, The terminal is configured to acquire cross-sectional shape information (SX) including the current cross-sectional shape (S) at at least one planned cross-sectional location. The retaining wall shape determination unit is configured to determine control points (CPs) indicating the installation position of the retaining wall based on the cross-sectional shape information, the excavation information, and the riverbed height.

[0046] According to the method described in [2] above, the installation position of the retaining wall on the existing cross-sectional shape at the planned cross-sectional location can be determined.

[0047] [3] In some embodiments, the method described in [2] above, The terminal further includes a construction drawing output unit (34) that outputs a construction drawing (60) to the terminal, which shows the retaining wall superimposed on the cross-sectional shape of the current situation using the control points.

[0048] According to the method described in [3] above, construction drawings can be quickly obtained by inputting excavation information on-site.

[0049] [4] In some embodiments, the method described in any one of [1] to [3] above, The at least one planned crossing location includes a first planned crossing location (P1) and a second planned crossing location (P2) that follows the first planned crossing location in the direction of extension of the river. The terminal further includes a construction quantity calculation unit (36) that calculates the construction quantity (70) for constructing the retaining wall from the first planned cross-section to the second planned cross-section based on the shape of the retaining wall at the first planned cross-section and the shape of the retaining wall at the second planned cross-section.

[0050] According to the method described in [4] above, construction quantities that reflect excavation information can be obtained.

[0051] [5] In some embodiments, the method described in any one of [1] to [4] above, The retaining wall shape determination unit determines the shape of the retaining wall to be anchored to the bedrock when the depth at which the bedrock appears is known, and determines the shape of the retaining wall to be anchored to the sedimentary soil (9) when the depth at which the bedrock appears is unknown.

[0052] According to the method described in [5] above, the appropriate retaining wall shape can be quickly obtained on-site in accordance with the excavation information. [Explanation of Symbols]

[0053] 2 terminals 3 Display screen 4. Top of the seawall 6 river bed 6a Planned riverbed 6b Deepest river bed 7 Virtual lines 8. Natural Line 9 Sediment soil 10 Support 14. Bedrock Line 15 Bedrock 16. Crushed stone backfill 19. Planned installation locations 20 Input fields 30 Information acquisition department 31 Information Input Section 32 Retaining wall shape determination section 34 Construction drawing output unit 36. Construction Quantity Calculation Department 40 checkboxes 42 Text boxes 44 Output buttons 50 Retaining wall 51 Interior wall surface 53 Bottom 60 Construction drawings 62 Output field 70 Construction Quantity 100 Rivers 102 Katagishi 104 Inflection points A1 First bedrock anchoring shape A2 Second bedrock anchoring shape A3 Third bedrock anchoring shape A4 Fourth rock formation anchorage shape B1 First sediment anchoring shape B2 Second sediment anchoring shape B3 Third type of sediment anchoring shape CP Control Point D1 Vertical direction D2 Left / right direction Dr extension direction Db bedrock depth E Embankment Hr riverbed height Hs Bottom height Hw Revetment crest height O center line P Plan Cross-sectional Location P1 First plan crossing location P2 Second Plan Crossing Location P3 Third Plan Crossing Location Q Fixation position S-shaped cross section S1 Preparation Steps S2 Excavation Step S3 Retaining wall shape output step S101 Step 1 S102 Step 2 S103 Step 3 S104 Step 4 S105 Step 5 S106 Step 6 SX Cross-sectional Shape Information W (Wide width) X1 Initial Information X2 bed excavation information h Height of the retaining wall w width of retaining wall θ: Angle of inclination of the inner wall surface of the retaining wall.

Claims

1. A method for determining the shape of a retaining wall that constitutes a riverbank, A preparation step of preparing a portable terminal capable of acquiring initial information including the height of the revetment crest and the riverbed height at at least one planned crossing point of the river, A digging step to obtain digging information including the depth at which bedrock is exposed by digging the planned location for the retaining wall at at least one of the planned cross-sectional locations, The system includes a retaining wall shape output step in which the terminal outputs the shape of the retaining wall by inputting the excavation information into the terminal, The aforementioned terminal is Includes a retaining wall shape determination unit that determines the bottom height of the retaining wall at at least one planned cross-sectional location from the riverbed height and the excavation information, and determines the shape of the retaining wall from the revetment top height and the bottom height, Method for determining the shape of a retaining wall.

2. The terminal is configured to acquire cross-sectional shape information, including the current cross-sectional shape at at least one planned cross-sectional location. The retaining wall shape determination unit is configured to determine control points indicating the installation position of the retaining wall from the cross-sectional shape information, the excavation information, and the riverbed height. The method for determining the shape of a retaining wall according to claim 1.

3. The terminal further includes a construction drawing output unit that outputs to the terminal a construction drawing in which the retaining wall is superimposed on the existing cross-sectional shape using the control points. The method for determining the shape of a retaining wall according to claim 2.

4. The at least one planned crossing location includes a first planned crossing location and a second planned crossing location that follows the first planned crossing location in the direction of extension of the river. The terminal further includes a construction quantity calculation unit that calculates the construction quantity required to construct the retaining wall from the first planned cross-sectional position to the second planned cross-sectional position based on the shape of the retaining wall at the first planned cross-sectional position and the shape of the retaining wall at the second planned cross-sectional position. A method for determining the shape of a retaining wall according to any one of claims 1 to 3.

5. The retaining wall shape determination unit determines the shape of the retaining wall to be anchored to the bedrock when the depth at which the bedrock appears is known, and determines the shape of the retaining wall to be anchored to the sediment when the depth at which the bedrock appears is unknown. A method for determining the shape of a retaining wall according to any one of claims 1 to 3.

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