CN117669081A - Arch dam foundation excavation design method - Google Patents
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Abstract
The invention discloses an arch dam foundation excavation design method, belongs to the technical field of water conservancy and hydropower engineering, and can solve the problems that the existing arch dam excavation design is long in time and difficult to control in excavation slope ratio. The method comprises the following steps: s1, creating an excavation surface at the upper part of a dam top on a terrain geological model of an arch dam site area according to a three-dimensional model of an arch dam body; s2, constructing a layered excavation datum line from the elevation of the bottom surface of the dam body to the elevation of the top surface of the dam body on the terrain geological model, and creating a dam body excavation surface according to the layered excavation datum line; s3, creating a dam foundation excavation model according to the upper excavation surface of the dam top and the dam body excavation surface. The method is used for designing the arch dam foundation excavation model.
Description
Technical Field
The invention relates to an arch dam foundation excavation design method, and belongs to the technical field of hydraulic and hydroelectric engineering.
Background
The arch dam is used as a common dam for hydroelectric engineering, is widely applied to various hydraulic and hydroelectric engineering and plays a great role in national economic development. Arch dams are generally built in Gao Shanxia valleys, the side slopes of the river bank are steep, the topography and geological conditions are complex, the body type of the arch dam is complex, and foundation excavation is always the key point and difficulty of arch dam design.
The prior art generally utilizes three-dimensional software modeling or CAD software for excavation design, and has the following defects: 1. the arch dam foundation is excavated by adopting a radial section method, the excavated section is required to determine geological conditions according to the body type of the arch dam, and the excavation design can be carried out after the geological section is drawn. When the arch dam body type is changed, the geological section is required to be drawn again, then excavation design is carried out, so that a designer and geological specialists are required to coordinate and cooperate for a plurality of times, and the time of design work can be obviously increased. 2. By adopting the radial section excavation method, the excavation slope ratio is inconvenient to control, the side slope in the section excavation diagram is inconsistent with the designed side slope, and the excavation direction of the side slope excavation design is not satisfied. 3. The traditional excavation method can not coordinate excavation of the side slopes on the whole, and coordination and control of the excavation of the side slopes are not visual.
Disclosure of Invention
The invention provides an arch dam foundation excavation design method which can solve the problems that the existing arch dam excavation design is long in time and difficult to control in excavation slope ratio.
The invention provides an arch dam foundation excavation design method, which comprises the following steps:
s1, creating an excavation surface at the upper part of a dam top on a terrain geological model of an arch dam site area according to a three-dimensional model of an arch dam body;
s2, constructing a layered excavation datum line from the elevation of the bottom surface of the dam body to the elevation of the top surface of the dam body on the terrain geological model, and creating a dam excavation surface according to the layered excavation datum line;
s3, creating a dam foundation excavation model according to the upper excavation surface of the dam crest and the dam body excavation surface.
Optionally, after the step S3, the method further includes:
and adjusting the excavation slope ratio in the dam foundation excavation model according to the terrain geological model to obtain an updated dam foundation excavation model.
Optionally, before the step S1, the method further includes:
and drawing a dam body three-dimensional model according to the arch dam design parameters, and drawing a topography geological model of the arch dam address area according to geological data of the dam address area.
Optionally, the S1 specifically is:
and establishing an excavation surface at the upper part of the dam top by adopting a section method on the topographic and geological model of the dam site area of the arch dam according to the three-dimensional model of the dam body and geological data of the dam site area.
Optionally, in the step S2, a layered excavation datum line from the elevation of the bottom surface of the dam to the elevation of the top surface of the dam is constructed on the topographic-geological model, and specifically includes:
determining dam excavation outline on the elevation of the bottom surface of the dam, and excavating layer height and excavating slope ratio of layered excavation;
and determining a layered excavation datum line of each layer of excavation surface according to the dam body excavation outline, the excavation layer height and the excavation slope ratio of the layered excavation.
Optionally, determining a layered excavation datum line of each layer of excavation surface according to the dam body excavation outline, the excavation layer height and the excavation slope ratio of the layered excavation, and specifically:
taking the dam body excavation outline as a bottom excavation datum line, and determining an excavation boundary line of an upper excavation surface according to the bottom excavation datum line and the excavation layer height and the excavation slope ratio of the upper excavation surface;
and forming a layered excavation datum line of the upper layer of excavation surface according to the excavation edge line and the reserved pavement width, and sequentially determining the layered excavation datum line of each layer of excavation surface layer by taking the layered excavation datum line as a bottom layer excavation datum line.
Optionally, in the step S2, creating a dam excavation face according to the layered excavation datum line specifically includes:
correspondingly connecting turning points on the excavation edge line of each layer of excavation surface with turning points on the corresponding bottom layer excavation reference line to form guide lines of each layer of excavation surface;
and creating a dam excavation face according to the layered excavation datum line and the guide line.
Optionally, creating a dam excavation face according to the layered excavation datum line and the guide line specifically includes:
forming an excavation edge slope surface according to the layered excavation datum line and the guide line;
and forming a pavement in a filling mode, and combining the Ma Daomian with the excavation slope surface to form a dam excavation surface.
Optionally, the excavation slope ratio in the dam foundation excavation model is adjusted according to the terrain geological model, so as to obtain an updated dam foundation excavation model, which specifically comprises:
and adjusting a layered excavation datum line in the dam foundation excavation model according to the excavation surface cut by the terrain geological model to obtain an updated dam foundation excavation model.
Optionally, the rock stratum weathering type of the terrain geological model is divided into a strong weathering layer, a weak weathering layer and a light weathering layer from top to bottom.
The invention has the beneficial effects that:
(1) According to the arch dam foundation excavation design method, the layered excavation datum line from the bottom surface to the top surface of the dam body is constructed in a planar layered mode, so that an excavation surface of the dam body is created. The method changes the traditional method of adopting radial section to design the dam foundation excavation of the arch dam by the traditional arch dam, and can combine the geological two-dimensional planogram of the dam site area of the arch dam and the three-dimensional geological weathering model to design the excavation surface. In addition, for the arch dam, the longitudinal direction and the horizontal direction of the excavation slope are changed and are mutually related, so that the invention designs the layered excavation datum line through parameterization, is convenient for overall adjustment of the excavation surface, can rapidly form the excavation surface, and checks the overall effect after adjustment, thereby greatly improving the design quality and benefit.
(2) According to the arch dam foundation excavation design method, the horizontal layered excavation datum line is established, so that construction paying-off and excavation slope ratio control are facilitated, and a design drawing and construction are combined better, so that construction progress is accelerated. Meanwhile, the three-dimensional solid classification excavation is adopted, so that the rationality of the slope design can be directly checked from the color of the excavation surface, and the slope design can be conveniently adjusted.
Drawings
Fig. 1 is a flowchart of an arch dam foundation excavation design method based on a CATIA platform according to an embodiment of the present invention;
FIG. 2 is a schematic view of a three-dimensional terrain geologic model provided by an embodiment of the invention;
FIG. 3 is a schematic diagram of a dam three-dimensional model according to an embodiment of the present invention;
FIG. 4 is a schematic diagram of creating a dam crest abutment slope excavation surface according to an embodiment of the present invention;
FIG. 5 is a schematic view of a layered excavation datum line and a guideline provided by an embodiment of the present invention;
FIG. 6 is a schematic diagram of an excavation surface of an upper portion of a dam crest and an excavation surface of a dam body according to an embodiment of the present invention;
fig. 7 is a schematic diagram of excavation adjustment according to an embodiment of the present invention;
fig. 8 is a schematic diagram of the overall effect after excavation according to the embodiment of the present invention.
List of parts and reference numerals:
1. geological drilling points; 2. a terrain surface; 3. strong weathering lower limit curved surface; 4. weak weathering lower limit curved surface; 5. a strong weathering layer; 6. weak weathering layers; 7. a micro-weathering layer; 8. a dam body three-dimensional model; 9. the dam top of the arch dam; 10. the bottom surface of the arch dam; 11. a right dam abutment top; 12. a left dam abutment top; 13. excavating a base line of the slope; 14. excavating a normal profile of a section; 15. digging surface at upper part of dam top; 16. a bottom base line of the arch dam model; 17. a dam body bottom surface elevation datum plane; 18. dam body excavation outline; 19. a first layer of pavement elevation datum plane; 20. excavating a border of the first layer; 21. a guide wire; 22. a first layer of excavation datum line; 23. digging a surface at the top of the left dam abutment; 24. digging a surface at the top of the right dam abutment; 25. dam body excavation surface; 26. b, excavating datum lines in layers; 27. adjusting the projection distance of the front datum line and the rear datum line; 28. dam foundation excavation result surface; 29. excavating a result surface of the left dam abutment; 30. excavating a result surface of the right dam abutment; 31. a pavement excavation result surface; 32. micro-weathering excavation of slope surfaces; 33. weak weathering excavation slope; 34. and (5) excavating a slope by strong wind.
Detailed Description
The present invention is described in detail below with reference to examples, but the present invention is not limited to these examples.
The embodiment of the invention provides a method for designing arch dam foundation excavation, which is shown in fig. 1 to 8, and comprises the following steps:
s1, creating a dam top excavation surface 15 on a terrain geological model of an arch dam site area according to the three-dimensional model 8 of the arch dam body.
Prior to S1, the method further comprises:
and drawing a dam body three-dimensional model 8 according to the arch dam design parameters, and creating a topography geological model of the arch dam address area according to geological data of the dam address area. The topographic geologic model is created in a rock stratum weathering type and is divided into a strong weathering layer 5, a weak weathering layer 6 and a weak weathering layer 7 from top to bottom.
And jointly creating a terrain geologic model where the dam site area is located through the terrain curved surface and the dam foundation three-dimensional geologic weathered curved surface which is built by combining with the early geologic investigation result. And layering by using CATIA spline curves to form an arch dam base line and form a dam body three-dimensional model 8.
FIG. 2 is a schematic view of a three-dimensional terrain geologic model according to an embodiment of the invention, and with reference to FIG. 2, a geologic borehole point 1 is data provided for a geologic survey; the terrain surface 2 is a curved surface generated on the CATIA platform by using point clouds; the strong-weathering lower limit curved surface 3 and the weak-weathering lower limit curved surface 4 are curved surfaces generated by fitting and forming point cloud achievements by using GOCAD software and using a CATIA platform according to the actual measurement data of geological survey holes; the strong weathering layer 5 is a rock mass between the terrain surface 2 and the strong weathering lower limit curved surface 3; the weak weathering layer 6 is a rock mass between the strong weathering lower limit curved surface 3 and the weak weathering lower limit curved surface 4; the micro-weathering layer 7 is a part of the rock mass below the weak weathering lower limit curved surface 4.
Fig. 3 is a schematic diagram of a dam three-dimensional model 8 according to an embodiment of the present invention. Referring to fig. 3, the arch dam crest 9 is the plane where the highest position of the three-dimensional model 8 of the dam body is located; the bottom surface 10 of the arch dam is a plane where the lowest position of the three-dimensional model 8 of the dam body is located; the right dam abutment top 11 is the right end part of the arch dam top 9 in the downstream direction; the left dam abutment 12 is the left end part of the arch dam abutment 9 in the downstream direction.
S1 specifically comprises the following steps:
and establishing an excavation surface 15 at the upper part of the dam top on the topographic model of the dam site area of the arch dam by adopting a section method according to the three-dimensional model 8 of the dam body and the geological current situation of the dam site area.
The method comprises the steps of obtaining a terrain geological model of an arch dam site area and a three-dimensional model 8 of an arch dam body, wherein the excavation design above a dam crest is combined with road arrangement, determining slope excavation design parameters according to geological conditions and related design specification requirements, and creating an excavation surface 15 at the upper part of the dam crest by adopting a section method.
Fig. 4 is a schematic diagram of creating a dam crest abutment slope excavation surface according to an embodiment of the present invention. Referring to fig. 4, a slope excavation baseline 13 is a slope excavation baseline designed according to the actual arrangement situation of engineering, and is used as a guide line for forming an excavation curved surface; the normal profile 14 of the excavation section is a design section of the excavation part and comprises related design parameters such as slope excavation height, slope, horse road and the like; the upper excavation surface 15 of the dam top is a curved surface generated by using a sweeping command in CATIA, taking an excavation section normal profile 14 as a section sketch and taking a slope excavation base line 13 as a guide line.
S2, constructing a layered excavation datum line 26 from the elevation of the bottom surface of the dam to the elevation of the top surface of the dam on the terrain geological model, and creating a dam excavation surface 25 according to the layered excavation datum line 26.
An arch dam excavation datum line (namely a layered excavation datum line 26) is established according to an excavation planning by a planar layered method from the elevation of the dam bottom surface, and a dam excavation face 25 is established according to a multi-section command based on the layered excavation datum line 26.
The method specifically comprises the following steps:
(1) The dam excavation profile 18 on the elevation of the dam floor is determined, as well as the excavation level height and the excavation slope ratio of the layered excavation.
(2) A layered excavation datum line 26 for each layer of excavation surface is determined based on the dam excavation profile 18 and the layer height and slope ratio of the layered excavation. Wherein, dam body excavation outline 18 and the excavation layer height and the excavation slope ratio of layering excavation need to satisfy relevant standard and construction condition requirement.
The method comprises the following steps:
the dam body excavation outline 18 is used as a bottom layer excavation datum line, and the excavation edge line of the upper layer excavation surface is determined according to the bottom layer excavation datum line, the excavation layer height and the excavation slope ratio of the upper layer excavation surface.
And forming a layered excavation datum line 26 of the upper layer of excavation surface according to the excavation boundary line and the reserved pavement width, and sequentially determining the layered excavation datum line 26 of each layer of excavation surface layer by taking the layered excavation datum line 26 as a bottom layer excavation datum line.
In practical application, the lowest layer of dam excavation outline 18 is determined, then the excavation layer height and slope ratio are determined primarily according to the weathering conditions of the topography and geology of the dam, the excavation side line of the upper layer is formed in a broken line mode, a horse way is reserved on the foundation, the bottom layer excavation datum line of the lower layer is formed, and the layered excavation datum line 26 of the arch dam foundation is completed in the similar way.
(3) And correspondingly connecting the turning points on the excavation edge lines of each layer of excavation surface with the turning points on the corresponding bottom layer excavation reference lines to form guide lines 21 of each layer of excavation surface.
The reference line of the excavation boundary is firstly determined from the arch dam bottom surface 10 (using a broken line), then the reference line of the excavation boundary of the elevation is established on the first layer pavement elevation reference surface 19 according to the height of the excavation platform, namely a first layer excavation edge line 20, the distance of the excavation edge line is converted into a horizontal distance according to the geological weathering type by determining the excavation slope ratio, and the position of the reference line of the excavation boundary of the layer is determined. After the excavation datum line is finished, the excavation boundary datum line of the horse road is finished according to the designed width of the horse road on the basis of the excavation datum line, the excavation datum line is used as a bottom excavation datum line of the next layer of excavation, the determination of the layered excavation datum line 26 below the dam crest is finished in the similar way, finally, according to the design of the excavation boundary datum line, the upper point and the lower point of the turning point of the folding line are correspondingly connected to form the guide line 21 of the excavation surface through excavation, the effective slope ratio of the excavation is further controlled according to the direction of each guide line, and the optimized design of the later excavation is facilitated.
(4) A dam excavation face 25 is created based on the layered excavation reference line 26 and the guideline 21.
The method specifically comprises the following steps: firstly, forming an excavation slope surface according to the layered excavation datum line 26 and the guide line 21; the pavement is then formed in a filling manner and Ma Daomian is joined to the excavated slope surface to form the dam excavation face 25.
Fig. 5 is a schematic diagram of a layered excavation reference line 26 and a guide line 21 according to an embodiment of the present invention. Referring to fig. 5, the bottom base line 16 of the arch dam model is the contour line of the arch dam bottom surface 10; the dam body bottom surface elevation datum plane 17 is an elevation surface where the arch dam bottom surface 10 is positioned and is used for positioning the position of the excavation sketch; the dam body excavation outline 18 is an excavation boundary line designed according to the arch dam model bottom baseline 16, the range of the general arch dam model bottom baseline 16 is smaller than the range contained in the dam body excavation outline 18, and the dam body excavation outline 18 and the reference line are all in a fold line shape so as to adapt to different spatial relations; the first-layer horse road elevation reference surface 19 is an elevation surface where the first-stage horse road is located from the dam bottom surface elevation reference surface 17 determined according to geological conditions and design arrangement; the first layer excavation edge line 20 is an excavation datum line designed according to a projection relation between dam excavation contours 18, and the first layer excavation edge line 20 and the dam excavation contours 18 form a first layer excavation curved surface through a guide line 21 of an excavation boundary; the guide line 21 of the excavation boundary is a connecting line of points at folding points at corresponding positions of folding lines of the dam excavation outline 18 and the first layer excavation edge line 20 and is used for controlling the excavation slope ratio;
the first layer of excavation datum line 22 is a boundary datum line designed according to a certain offset distance (a pavement design width) of the first layer of excavation datum line 20, and forms a pavement platform with the first layer of excavation datum line 20, and the first layer of excavation datum line 22 is used as a base line of a next excavation curved surface so as to sequentially finish the creation of the excavation datum line below a dam crest and the generation of the curved surface; according to the layered excavation datum line 26, a layered excavation surface is created according to a multi-section command of CATIA, excavation directions are controlled by using a guide line 21, excavation slope surfaces are sequentially formed, then a curved surface filling command is used for forming Ma Daomian, finally a joint command is used for bonding the curved surface to form a dam excavation surface 25 below a dam crest.
Fig. 6 is a schematic diagram of a dam top excavation surface 15 and a dam body excavation surface 25 according to an embodiment of the present invention. Referring to fig. 6, the left dam abutment top excavation surface 23 is an excavation curved surface of a portion above the elevation of the left dam abutment top 12, and is used for cutting a left portion of rock mass of the arch dam top 9; the right dam abutment top excavation surface 24 is an excavation curved surface of the part above the elevation of the right dam abutment top 11 and is used for cutting rock mass on the right side part of the arch dam top 9; the dam body excavation surface 25 is an excavation curved surface of the middle parts of the arch dam tops 9 and the arch dam bottom surfaces 10 and is used for cutting rock bodies of the middle parts of the arch dam tops 9 and the arch dam bottom surfaces 10, and foundation excavation of the arch dam is finally completed.
And S3, creating a dam foundation excavation model according to the dam top excavation surface 15 and the dam body excavation surface 25.
Further, after S3, the method further includes:
and further adjusting and optimizing the excavation slope ratio in the dam foundation excavation model according to the terrain geological model to obtain an updated dam foundation excavation model.
The method comprises the following steps: and further adjusting the directions of the layered excavation datum line 26 and the guide line 21 in the dam foundation excavation model according to the excavation pictogram of the preliminary cut topography geological model and the rock mass weathering condition, so as to obtain an updated dam foundation excavation model.
And (5) adjusting an excavation surface according to geological conditions, and excavating according to the weathering categories. Fig. 7 is a schematic diagram of excavation adjustment according to an embodiment of the present invention. Referring to fig. 7, a layered excavation datum line 26 is a design datum line of each layer including a dam excavation outline 18, a first layer excavation edge line 20, and a first layer excavation datum line 22; the distance 27 between the front and rear datum line projection is adjusted to be the distance between the datum line projections of each layer of the excavation curved surface, and the excavation slope ratio is controlled together with the guideline 21 of the excavation boundary. Fig. 7 shows that the projection distance of the layer of the excavation curved surface base line before adjustment is 10, and after the excavation base line is adjusted, the projection distance of the layer of the excavation curved surface base line becomes 12.5.
And (3) continuously adjusting the position of a horizontal excavation baseline (namely a layered excavation datum line 26) and the direction of the guide line 21 according to the requirements from bottom to top and from the dam abutment to the middle of the river channel according to the dam foundation excavation model formed in the step (S3) and the weathering type disclosed by the excavation surface until the excavation side slope and the geological condition of each layer are consistent and reasonable. The reasonable standards for compliance are: the slope is connected smoothly, the slope ratio is excavated in a segmented way, and the geological conditions are weathered, so that the topographic conditions are adapted.
After the final excavation surface is determined, the excavation updating of the arch dam foundation is completed through refreshing, so that the design modification time can be effectively saved, the design working efficiency and the product quality are improved, and then the excavation amount is counted according to the actual needs in a classified mode.
Fig. 8 is a schematic diagram of the overall effect after excavation according to the embodiment of the present invention. Fig. 8 shows a dam foundation excavation result face 28, a left dam abutment excavation result face 29, a right dam abutment excavation result face 30, a catwalk excavation result face 31, a breeze excavation slope face 32, a weak breeze excavation slope face 33, a strong breeze excavation slope face 34, and the excavation results can be used for drawing, calculating engineering quantities and the like. Wherein the slope of the excavation slope is steep to slow the slope of the breeze excavation slope 32 < the slope of the weak weathering excavation slope 33 < the slope of the strong breeze excavation slope 34.
The excavation of the dam tops is finished according to the weathering categories by using the excavation face 15 of the upper part of the dam tops, and then excavation entities of different weathering categories are finished according to the CATIA cutting orders by using the excavation face 25 of the dam body. According to the condition that excavation is completed, whether the overall rechecking excavation meets the overall design requirement or not is checked, the position of the layered excavation guide line can be adjusted from bottom to top to adjust the excavation surface, and the adjustment of the excavation surface is completed through the refreshing command of CATIA until the design requirement is met. And finally, finishing classification engineering quantity statistics by using the CATIA measurement command.
The invention constructs a layered excavation datum line 26 from the bottom surface to the top surface of the dam body in a planar layered mode so as to create a dam excavation surface 25. The method changes the traditional method of adopting radial section to design the dam foundation excavation of the arch dam by the traditional arch dam, and can combine the geological two-dimensional planogram of the dam site area of the arch dam and the three-dimensional geological weathering model to design the excavation surface. In addition, for the arch dam, the longitudinal direction and the horizontal direction of the excavation slope are changed and are mutually related, so that the excavation surface is convenient to overall adjust by parameterizing the layered excavation datum line 26, the excavation surface can be rapidly formed, and the overall effect after adjustment is checked, so that the design quality and benefit are greatly improved.
The horizontal layered excavation datum line 26 is established, so that construction paying-off and control of excavation slope ratio are facilitated, and a design drawing and construction are combined better, so that construction progress is accelerated. Meanwhile, the three-dimensional solid classification excavation is adopted, so that the rationality of the slope design can be directly checked from the color of the excavation surface, and the slope design can be conveniently adjusted.
The foregoing description is only a few examples of the present application and is not intended to limit the present application in any way, and although the present application is disclosed in the preferred examples, it is not intended to limit the present application, and any person skilled in the art may make some changes or modifications to the disclosed technology without departing from the scope of the technical solution of the present application, and the technical solution is equivalent to the equivalent embodiments.
Claims (10)
1. An arch dam foundation excavation design method, which is characterized by comprising the following steps:
s1, creating an excavation surface at the upper part of a dam top on a terrain geological model of an arch dam site area according to a three-dimensional model of an arch dam body;
s2, constructing a layered excavation datum line from the elevation of the bottom surface of the dam body to the elevation of the top surface of the dam body on the terrain geological model, and creating a dam excavation surface according to the layered excavation datum line;
s3, creating a dam foundation excavation model according to the upper excavation surface of the dam crest and the dam body excavation surface.
2. The method according to claim 1, characterized in that after said S3, the method further comprises:
and adjusting the excavation slope ratio in the dam foundation excavation model according to the terrain geological model to obtain an updated dam foundation excavation model.
3. The method according to claim 1, characterized in that before said S1, the method further comprises:
and drawing a dam body three-dimensional model according to the arch dam design parameters, and drawing a topography geological model of the arch dam address area according to geological data of the dam address area.
4. The method according to claim 1, wherein S1 is specifically:
and establishing an excavation surface at the upper part of the dam top by adopting a section method on the topographic and geological model of the dam site area of the arch dam according to the three-dimensional model of the dam body and geological data of the dam site area.
5. The method according to claim 1, wherein the step S2 is to construct a layered excavation datum line from a dam bottom surface elevation to a dam top surface elevation on the topographic model, specifically:
determining dam excavation outline on the elevation of the bottom surface of the dam, and excavating layer height and excavating slope ratio of layered excavation;
and determining a layered excavation datum line of each layer of excavation surface according to the dam body excavation outline, the excavation layer height and the excavation slope ratio of the layered excavation.
6. The method according to claim 5, wherein a layered excavation datum line of each layer of excavation surface is determined according to the dam excavation profile and the excavation layer height and the excavation slope ratio of the layered excavation, specifically:
taking the dam body excavation outline as a bottom excavation datum line, and determining an excavation boundary line of an upper excavation surface according to the bottom excavation datum line and the excavation layer height and the excavation slope ratio of the upper excavation surface;
and forming a layered excavation datum line of the upper layer of excavation surface according to the excavation edge line and the reserved pavement width, and sequentially determining the layered excavation datum line of each layer of excavation surface layer by taking the layered excavation datum line as a bottom layer excavation datum line.
7. The method of claim 6, wherein creating a dam excavation face according to the hierarchical excavation datum line in S2 specifically comprises:
correspondingly connecting turning points on the excavation edge line of each layer of excavation surface with turning points on the corresponding bottom layer excavation reference line to form guide lines of each layer of excavation surface;
and creating a dam excavation face according to the layered excavation datum line and the guide line.
8. The method of claim 7, wherein creating a dam excavation face based on the layered excavation datum line and the guideline, comprises:
forming an excavation edge slope surface according to the layered excavation datum line and the guide line;
and forming a pavement in a filling mode, and combining the Ma Daomian with the excavation slope surface to form a dam excavation surface.
9. The method of claim 2, wherein the excavation slope ratio in the dam excavation model is adjusted according to the terrain-geological model to obtain an updated dam excavation model, specifically:
and adjusting a layered excavation datum line in the dam foundation excavation model according to the excavation surface cut by the terrain geological model to obtain an updated dam foundation excavation model.
10. The method of claim 1, wherein the formation weathering types of the topographical geologic model are divided into top-down strong weathering layers, weak weathering layers, and weak weathering layers.
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