Graphical geological logging method for exploring groove

Abstract

The invention relates to the field of engineering investigation, and provides a graphical geological logging method for a probe groove in order to realize the integrity and continuity of a two-dimensional logging result after three-dimensional restoration: determining the spatial position of the axis of the probe groove in a three-dimensional engineering overall coordinate system, and generating a three-dimensional spatial form of the probe groove based on basic parameters of the probe groove; the probe groove is divided into a left side wall, a bottom plate and a right side wall to form a probe groove two-dimensional expansion view; establishing a local coordinate system on the two-dimensional expansion graph by taking a starting point or a stopping point of the axis of the probe groove as a coordinate origin, and drawing a two-dimensional coordinate grid on the two-dimensional expansion graph of the probe groove based on the local coordinate system; drawing a geologic body outcrop line and recording geological attribute information on the two-dimensional exploring groove expansion graph on which the two-dimensional coordinate grid is drawn according to data obtained after field excavation exploring groove; and mapping the outcrop line to the three-dimensional space model according to the mapping relation between the local coordinate system and the three-dimensional engineering overall coordinate system. By adopting the mode, the integrity and continuity of the two-dimensional catalog result after three-dimensional reduction are realized.

Description

Technical Field

[0001] The invention relates to the field of engineering survey, and in particular to a trench graphical geological logging method. Background Art

[0002] Geological exploration is a common means of understanding geological conditions before engineering construction. In addition to common drilling, pits and trenches are often used in the construction of large-scale infrastructure. In the process of underground engineering construction, pits, trenches, wells and holes are often dug manually or mechanically, which becomes an important means to further understand the geological conditions of the engineering area, so as to directly observe the natural state of the rock and soil layers and the geological structure of each stratum. For this reason, some industries require the geological cataloging of trenches to record and describe in detail the geological conditions (outcrops) revealed by the trenches, and to obtain soil samples with original structures close to the actual ones.

[0003] At present, the geological cataloging of the exploration trench still mainly uses the traditional paper cataloging. First, the display diagram of the side wall and the bottom of the exploration trench is drawn on the paper coordinate paper and the corresponding two-dimensional coordinate system is established. Then, the geological outcrop lines on the side wall and the bottom of the exploration trench are outlined on the display diagram with two-dimensional coordinates, and the corresponding geological features and the geological spatial relationship between them are recorded separately; then the digitalization is completed indoors to draw the geological outcrop sketch of the exploration trench. The entire operation process is not only time-consuming and inefficient, but also independent of each other. The previous results lack uniformity in three-dimensional analysis, which directly affects the utilization rate of the cataloging data and cannot be directly used in three-dimensional geological modeling and spatial analysis.

[0004] With the popularity of mobile electronic devices such as tablet computers, some institutions have studied the trench cataloging method of using electronic coordinate paper instead of paper coordinate paper. The invention patent with publication number CN106777155A discloses a geological cataloging method based on electronic centimeter paper. This method divides the exploration trench into three independent parts: the left and right side walls and the bottom plate. A two-dimensional coordinate system is established for each part according to a fixed size, and an electronic sketch is performed. Then, the spatial information in the two-dimensional local coordinates is extracted through a vector diagram. This method realizes the integration of indoor and outdoor work through electronic cataloging, omits the manual entry process of indoor work, and can greatly improve work efficiency. However, this method still has three defects. First, the geological exploration data are independent of each other and lack unity, that is, the independent sketches cannot restore the three-dimensional spatial information of the site as a whole, and it is difficult to establish a spatial relationship with other exploration methods (such as drilling); secondly, the spatial topological relationship of the geological boundaries is ignored. This method cannot correctly express the topological relationship of the strata in the form of segmented bodies. The geological attribute information is mainly based on phenomenon description and lacks attention to internal relationships. The exploration trenches generated by this method do not have the ability to be cataloged as a whole. They are only cataloged separately for each straight section of the exploration trench through segmentation, which makes it impossible to catalog all of them at once according to the axis. The cataloging maps of each part are independent of each other, and the integrity and continuity of the geological outcrop cataloging results after restoring the three-dimensional space cannot be guaranteed; thirdly, the standardization of geological descriptions is insufficient. The description of geological characteristics is greatly affected by the cognitive ability and experience of on-site geologists, which affects the quality of basic data. Summary of the invention

[0005] In order to achieve the integrity and continuity of two-dimensional cataloging results after restoring them to three dimensions, the present application provides a trench graphical geological cataloging method.

[0006] The technical solution adopted by the present invention to solve the above problems is:

[0007] The trench graphical geological logging method includes:

[0008] Step 1: determine the spatial position of the trench axis in the three-dimensional engineering overall coordinate system, and generate the three-dimensional spatial shape of the trench based on the basic parameters of the trench; the trench axis is connected by control points, and the control points at least include the starting point and the end point of the trench axis;

[0009] Step 2: split the exploration trench into a left side wall, a bottom plate and a right side wall to form a two-dimensional expansion diagram of the exploration trench;

[0010] Step 3, establishing a local coordinate system on the two-dimensional development diagram with the starting point or end point of the trench axis as the coordinate origin, and drawing a two-dimensional coordinate grid on the two-dimensional development diagram of the trench based on the local coordinate system;

[0011] Step 4: Draw the geological body outcrop line on the two-dimensional development map of the exploration trench with the two-dimensional coordinate grid drawn according to the data obtained after the on-site exploration trench is excavated, and record the geological attribute information;

[0012] Step 5: According to the mapping relationship between the local coordinate system and the overall coordinate system of the three-dimensional engineering, the outcrop line is mapped onto the three-dimensional space model.

[0013] Furthermore, the control point also includes the inflection point of the exploration groove axis, and the step 2 is: segmenting the exploration groove axis according to the inflection point of the exploration groove axis, splitting the exploration groove corresponding to each segment into a left side wall, a bottom plate and a right side wall, and connecting the side wall and the bottom plate of each segment in series according to the corresponding inflection point to form a two-dimensional expansion diagram of the exploration groove.

[0014] Furthermore, the two-dimensional coordinate grid is generated using electronic grid paper.

[0015] Furthermore, azimuth information is also provided on the two-dimensional coordinate grid.

[0016] Furthermore, the step 4 of drawing the geological body outcrop line and cataloguing the geological attribute information is based on one wall and one bottom or two walls and one bottom.

[0017] Furthermore, the step 2 also includes establishing a sub-section at a designated position of the trench axis along a direction perpendicular to the trench axis according to the progress of the trench excavation on site, wherein the boundary of the sub-section is the intersection line with the trench bottom and the two trench walls;

[0018] The step 3 also includes establishing a sub-section coordinate system on the sub-section, and drawing a two-dimensional coordinate grid based on the sub-section coordinate system;

[0019] The step 4 also includes drawing geological body outcrop lines on the sub-sections and cataloging geological attribute information;

[0020] The step 5 also includes mapping the outcrop line onto the three-dimensional space model according to the mapping relationship between the sub-section coordinate system and the three-dimensional engineering overall coordinate system.

[0021] Furthermore, in step 4, the step of drawing the geological body outcrop line is:

[0022] The surface line is drawn as the characteristic line according to the on-site excavation situation. The position of the outcrop line is determined and drawn based on the surface line and the axis of the exploration trench. The geological body is divided into sections based on the outcrop lines of the upper and lower geological bodies. The division categories include: continuous body, discontinuous body and single line.

[0023] Furthermore, in step 4, the geological attribute information is catalogued based on an engineering dictionary.

[0024] Furthermore, the engineering dictionary includes: stratigraphic code, designation of whether it is a large layer and setting of stratigraphic sequence, rock and soil name corresponding to the stratigraphic layer, rock and soil type name, geological origin, stratigraphic age, age code, realm, system, system and geological description.

[0025] Compared with the prior art, the present invention has the following beneficial effects: first, the spatial form of the exploration trench in the three-dimensional overall coordinate system is determined by the spatial attributes of the axis and the basic parameters of the exploration trench, and then the bottom and left and right walls of the exploration trench are two-dimensionally cataloged in the form of an electronic expansion diagram using the local coordinate system, and the topological relationship between the geological boundaries is correctly established by defining the start and end boundaries of the geological object along the vertical downward excavation direction to establish the concept of the section body, which is convenient for reference and judgment in subsequent three-dimensional modeling and complex spatial analysis; the corresponding attribute information is recorded in a standardized manner according to the set standard dictionary library, which solves the inconsistency and error-proneness of personal input, and the standardized input is efficient, which is convenient for subsequent electronic extraction of fields for data statistical analysis; the spatial information of the geological outcrop is automatically mapped to the three-dimensional space overall coordinate system through the relationship between the two-dimensional local coordinates of the expansion diagram and the three-dimensional coordinate system, and the three-dimensional geological cataloging results are truly restored, and can be used together with other survey results in the same set of three-dimensional space coordinate systems for three-dimensional geological modeling, three-dimensional space analysis, auxiliary three-dimensional design and three-dimensional calculation, etc., which is more flexible and convenient to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 A flow chart of the method for graphical geological logging of trenches;

[0027] Figure 2 The geometric shape and relative position of the exploration groove in the overall spatial coordinate system;

[0028] Figure 3 Schematic diagram for logging the geological outcrop lines of the continuum;

[0029] Figure 4 To provide a schematic diagram for the compilation of geological outcrop lines for non-continuities;

[0030] Figure 5 cataloguing schematics for individual lines;

[0031] Figure 6 Schematic diagram of the coordinate grid for the two-dimensional cataloging of the subsection;

[0032] Figure 7 This is a schematic diagram of the results of mapping the two-dimensional boundary of the exploration trench to the three-dimensional exploration trench model surface;

[0033] Figure numerals: 1 is the trench axis, 2 is the trench depth, 3 is the trench width, 4 is the starting point, 5 is the turning point, 6 is the end point, 7 is the sub-section, 8 is the side wall, 9 is the geological boundary of the side wall, and 10 is the geological boundary of the sub-section. DETAILED DESCRIPTION

[0034] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0035] like Figure 1 As shown, the trench graphical geological logging method includes:

[0036] 1. First, the spatial position of the trench axis 1 is described using the overall engineering coordinates and the starting point is defined. The three-dimensional spatial form of the trench is generated based on the basic parameters of the trench (including number, trench length, trench width 3, trench depth 2, control point coordinates, etc.). The trench axis is connected by control points, which are segmentation points on the axis, including at least the axis starting point 4 and the end point 6, and some also include inflection points 5. The depth stake numbers of adjacent control points of the axis can be automatically calculated based on the control point coordinates.

[0037] like Figure 2 As shown, the starting point of the trench axis (X0, Y0, Z0) is used to find its coordinate position in the three-dimensional overall coordinate system, and the remaining control points (inflection points and end points) are used as axis nodes, which are connected in sequence to form the trench axis, thereby determining the spatial position of the axis in the three-dimensional overall coordinate system.

[0038] The maximum depth of the exploration trench generally does not exceed 3m. Since the depth of the exploration trench is relatively shallow and its design is mainly for observation and sampling rather than drainage or water treatment, the bottom of the exploration trench itself is horizontal and of uniform elevation, and there is no need to consider the slope design.

[0039] 2. Divide the axis of the exploration trench into sections according to the inflection points of the axis, split the exploration trench corresponding to each section into left and right side walls and bottom plate, connect each part in series according to the axis pile number, and form a two-dimensional expansion diagram of the exploration trench in combination with the basic parameters of the exploration trench such as the length, width, and maximum depth of the exploration trench.

[0040] In order to facilitate the on-site technicians to analyze and understand the micro-structural development of the bedding and other micro-structures of the front excavation surface during the trench excavation process, and to further refine the geological conditions after the trench excavation, a sub-section 7 can be established along the vertical axis at the specified depth pile position according to the excavation progress. The boundary of the sub-section 7 is the intersection line with the trench bottom and the trench walls on both sides. Figure 6 As shown, a sub-section coordinate system is established on the sub-section, and a two-dimensional coordinate grid is drawn based on the sub-section coordinate system. The sub-section coordinate system takes the intersection with the axis as the origin, the positive direction of the horizontal axis points to the right side of the exploration groove, and the vertical axis is the ray emitted from the intersection of the sub-section and the axis in the vertical upward direction.

[0041] 3. Establish a local coordinate system on the two-dimensional unfolded diagram with the starting point or end point of the trench axis as the coordinate origin, and draw a two-dimensional coordinate grid on the two-dimensional unfolded diagram of the trench based on the local coordinate system.

[0042] The coordinate grid is generated by electronic grid paper. The electronic grid paper in this embodiment is 1cm×1cm square paper. Grid paper of other sizes can also be used according to actual needs. The on-site geologist draws a two-dimensional coordinate grid on the electronic catalog map according to a ratio of 1:100. The horizontal and vertical axis scale values ​​of the coordinate grid are determined according to the groove bottom width, the depth of the side wall of the exploration groove, and the axis depth stake number (exploration groove length).

[0043] If the trench is a straight section, you only need to define the starting point and the end point to generate a straight axis. Based on the spatial information carried by the axis and combined with the basic parameters of the trench, you can determine the spatial shape and position of the trench in the three-dimensional overall coordinate system. If the trench is a non-straight section and involves a turn, the turning point in the control point is the turning point of the axis, which is also the turning point of the trench. The trench generated in the three-dimensional overall coordinate system according to the basic parameters of the trench is in the form of a broken line, and the azimuth at the turning point will be inconsistent with the previous section, such as Figure 3 As shown, the azimuth after the inflection point changes from ES~90° to EN~56°. If it is a straight section, the azimuth after the inflection point will be consistent with the previous section EN~90°.

[0044] 4. According to the data obtained after the on-site trenching, the spatial position of the geological body outcrop line in the two-dimensional local coordinate system is outlined on the grid paper and the geological attribute information is recorded. When outlining the geological outcrop, the on-site geologists use a scale of 1:100 to record one wall and one bottom and the specified sub-section. If the geological phenomena of the two walls change greatly, the two walls and one bottom are recorded. By recording the sub-section geological information, the geological conditions of the trenching construction area can be better understood and controlled, construction safety can be ensured, the quality of the project can be improved, and a basis for future maintenance and management can be provided.

[0045] Before outcropping the upper and lower boundaries of a thick geological body, first draw the undulating surface line on the trench wall as a characteristic line according to the on-site excavation situation, and establish the geological topological relationship of the two geometric boundaries according to the surface line and the vertical downward excavation direction combined with the characteristics of the geological body. The geological topological relationship refers to the upper and lower relationship or the new and old relationship of the geological body according to the geological body boundary line. The upper and lower boundaries of the geological body include the stratum boundary line, the top and bottom plate interface of the fault, the start and end boundaries of weathering unloading, etc.

[0046] In the process of outlining the outcrop line, the three-dimensional coordinates of the outcrop line are continuously captured and the engineering dictionary values ​​are called when cataloging the geological attribute information. The geological attribute information is associated with the three-dimensional space through two-dimensional cataloging. The geological attribute information with spatial information can be directly used in the subsequent geological object analysis process to realize the graphical and standardized geological cataloging of the exploration trench, and the professional rationality of the cataloging results is improved by establishing a standardized working method.

[0047] The engineering dictionary is prefabricated with characteristic indicators carried in geological descriptions such as strata, faults, joints, weathering, and unloading. Taking the stratum information of the site as an example, to set the engineering dictionary value, it is necessary to define the stratum code of the proven stratum of the site, specify whether it is a large layer and set the sequence, and define the rock and soil name, rock and soil class name, geological origin, stratigraphic age, age code, boundary, system, system, geological description and other public information corresponding to the stratum. The defined geological characteristic dictionary value can be directly called when a thick geological body is outlined in the expansion diagram. As geological attribute information, the engineering dictionary of geological characteristics is defined according to standards and specifications (such as fault type, filling type, etc.), which is not affected by the cognitive ability and experience of on-site geologists, reduces the errors and inconsistencies of manual entry, greatly improves the standardization of geological descriptions, and facilitates the automated sorting of downstream internal work.

[0048] After outcropping lines are drawn, the geological body can be divided into sections. The divided sections mainly include the following three categories:

[0049] ① Continuum (including rock mass structure segmentation, weathering, unloading, groundwater segmentation, karst), the upper boundary of the continuum is the lower boundary of the previous geological body, as shown in the catalog diagram Figure 3 As shown;

[0050] ② Discontinuities (structural surfaces, bad geological bodies, creep), taking fractures and joints as examples, fractures are structural surfaces with independent upper and lower boundaries, and the upper boundary is not the lower boundary of any geological body, and joints are structural surfaces without thickness, and their upper and lower boundaries are merged into an independent boundary. In the process of drawing the upper and lower boundaries in the two-dimensional unfolded diagram, when the thickness of the upper and lower boundaries is less than 0.3m, the geological body is automatically defined as a joint fissure. When the thickness of the upper and lower boundaries is greater than 0.3m, the system will shift the upper boundary downward according to the input thickness value and automatically generate the lower boundary. The part surrounded by the upper and lower boundaries is the range section of the geological body. The catalog diagram is as follows Figure 4 shown.

[0051] ③ Single line (intrusion, lens, groundwater seepage), closed body or non-closed body composed of single boundary represents geological body object, such as intrusion, geological boundary is a closed line, it is a closed body drawn by the upper and lower boundaries of geological body, and groundwater seepage can be represented by a single non-closed line or a hole surrounded by a closed line, as shown in the catalog diagram Figure 5shown.

[0052] The engineering dictionary can also be used to record the topological relationship of geological outcrops, that is, to record the upper and lower order of strata in the engineering dictionary (which is also the association relationship between upper and lower geological boundaries). Strata are generally defined by stratum codes or geological eras in engineering dictionary values, which is convenient for directly calling corresponding geological boundary data for single geological three-dimensional modeling and statistical analysis; it is convenient for subsequent analysis of the overall geological object, and can be directly associated with the corresponding geological boundaries that have been determined on site, reducing the subsequent large-scale data processing, such as three-dimensional geological stratification, layer thickness statistics, structural surface thickness statistics, etc., which require manual re-matching due to lack of on-site related data reference and result in a large number of errors.

[0053] Taking the formation sandstone, granite and dolomite in the continuum as an example, the following information has been recorded in the engineering dictionary: the formation type of formation 1 sandstone is bedrock, the rock type is relatively soft rock, the genetic type is sedimentary rock, the formation occurrence is 16° dip and 24° dip; the formation type of formation 2 granite is bedrock, the rock type is hard rock, the genetic type is metamorphic rock, the formation occurrence is 15° dip and 27° dip; the formation type of formation 3 dolomite is bedrock, the rock type is medium hard rock, the genetic type is metamorphic rock, the formation occurrence is 14° dip and 22° dip. The above information can be directly called when the geological boundary line is drawn to define the section body, which is efficient and error-prone.

[0054] 5. Use the corresponding relationship between the two-dimensional coordinate system in the three-dimensional space coordinate system to establish the mapping relationship between the on-site two-dimensional electronic catalog map coordinate system and the three-dimensional engineering coordinate system of the trench. In the two-dimensional catalog process, the three-dimensional coordinate information can be obtained without manual coordinate conversion. The electronic two-dimensional expansion map contains the two-dimensional catalog data measured by the on-site personnel according to the pre-set local coordinate system. However, the system background automatically maps the parts (trench bottom and two side walls) passed by the geological boundary to the corresponding surface of the three-dimensional spatial model of the trench in the three-dimensional space coordinates. Figure 7 As shown, 7 is a sub-section, 8 is a side wall surface, 9 is a geological boundary of the side wall surface, and 10 is a geological boundary of the sub-section.

[0055] After the two-dimensional sub-section is cataloged, the sub-section can be restored to the three-dimensional space coordinate system according to the stake number of the axis through which the sub-section origin passes and the three-dimensional space coordinates of the axis control point, and then the corresponding geological boundary is mapped to the three-dimensional sub-section to ensure that the cataloging results follow the unified overall engineering coordinates.

[0056] The present invention utilizes computer graphics technology to realize electronic and graphical cataloging of geological outcrops in exploration trenches, utilizes programming technology to create coordinate conversion formulas, and automatically establishes a mapping relationship between a local coordinate system of a two-dimensional electronic cataloging map on site and a three-dimensional engineering coordinate system of the exploration trench, thereby ensuring that the cataloging result follows a unified overall engineering coordinate system; thereby, the geological outcrops are outlined in a two-dimensional unfolded map to obtain their spatial positions in the overall engineering coordinate system, and a spatial relationship with other explorations (such as drilling holes) is established for mutual verification and adjustment, thereby improving the utilization rate of cataloging data, and breaking through the problem that the results of pure two-dimensional operations (paper or electronic) lack three-dimensional uniformity and do not meet the requirements of three-dimensional geological modeling and spatial analysis.

[0057] The geological outcrop positions are outlined and the corresponding geological attribute information is recorded on the two-dimensional electronic development map according to the local two-dimensional coordinates available on site. The development map in the electronic coordinate paper is only a virtual plane map, which is actually the corresponding part of the three-dimensional model of the trench excavation contour (trench bottom, trench walls on both sides, and sub-sections). The outcrop lines obtained by two-dimensional coordinates are automatically mapped to the three-dimensional design model, that is, the randomly appearing geological outcrops are recorded in the three-dimensional design model.

[0058] The geological features and topological relationships are set as engineering dictionaries, and the geological topological relationships and geological feature description methods of the given engineering geological body outcrops are recorded in the engineering dictionary. The defined geological feature dictionary values ​​can be directly called when thick geological bodies are outlined in the electronic development map of the exploration trench. The engineering dictionary of geological features is defined according to standards and specifications and is not affected by the cognitive ability and experience of on-site geologists, which greatly improves the standardization of geological descriptions.

Claims

1. A graphical geological logging method for trenching, characterized in that: include: Step 1: determine the spatial position of the trench axis in the three-dimensional engineering overall coordinate system, and generate the three-dimensional spatial form of the trench based on the basic parameters of the trench; The exploration groove axis is connected by control points, and the control points at least include the starting point and the end point of the exploration groove axis; Step 2: split the exploration trench into a left side wall, a bottom plate and a right side wall to form a two-dimensional expansion diagram of the exploration trench; Step 3, establishing a local coordinate system on the two-dimensional development diagram with the starting point or end point of the trench axis as the coordinate origin, and drawing a two-dimensional coordinate grid on the two-dimensional development diagram of the trench based on the local coordinate system; Step 4: Draw the geological body outcrop line on the two-dimensional development map of the exploration trench with the two-dimensional coordinate grid drawn according to the data obtained after the on-site exploration trench is excavated, and record the geological attribute information; Step 5: According to the mapping relationship between the local coordinate system and the overall coordinate system of the three-dimensional engineering, the outcrop line is mapped onto the three-dimensional space model.

2. The method for graphically recording geological data in trenches according to claim 1, characterized in that: The control point also includes the inflection point of the exploration groove axis. The step 2 is: segmenting the exploration groove axis according to the inflection point of the exploration groove axis, splitting the exploration groove corresponding to each segment into a left side wall, a bottom plate and a right side wall, and connecting the side walls and the bottom plate of each segment in series according to the corresponding inflection point to form a two-dimensional expansion diagram of the exploration groove.

3. The method for graphically recording geological data in trenches according to claim 2, characterized in that: The two-dimensional coordinate grid is generated using electronic grid paper.

4. The method for graphically recording geological data in trenches according to claim 3, characterized in that: Azimuth information is also provided on the two-dimensional coordinate grid.

5. The method for graphically recording geological data in trenches according to claim 1, characterized in that: The step 4 is based on one wall and one bottom or two walls and one bottom when drawing the geological body outcrop line and cataloging the geological attribute information.

6. The method for graphically recording geological data in trenches according to claim 1, characterized in that: The step 2 also includes establishing a sub-section at a designated position of the trench axis along a direction perpendicular to the trench axis according to the progress of the trench excavation on site, wherein the boundary of the sub-section is the intersection line with the trench bottom and the trench walls on both sides; The step 3 also includes establishing a sub-section coordinate system on the sub-section, and drawing a two-dimensional coordinate grid based on the sub-section coordinate system; The step 4 also includes drawing geological body outcrop lines on the sub-sections and cataloging geological attribute information; The step 5 also includes mapping the outcrop line onto the three-dimensional space model according to the mapping relationship between the sub-section coordinate system and the three-dimensional engineering overall coordinate system.

7. The method for graphically recording geological data in trenches according to any one of claims 1 to 6, characterized in that: In step 4, the steps of drawing the geological body outcrop line are: Draw the surface line as the characteristic line according to the on-site excavation situation, and determine the position of the outcrop line based on the surface line and the axis of the exploration trench and draw it; The geological body is divided into sections based on the outcrop lines of the upper and lower geological bodies. The division categories include: continuous body, discontinuous body and single line.

8. The method for graphically recording geological data in trenches according to claim 7, characterized in that: In step 4, the geological attribute information is catalogued based on the engineering dictionary.

9. The method for graphically recording geological data in trenches according to claim 8, characterized in that: The engineering dictionary includes: stratigraphic code, specifying whether it is a large layer and setting the stratigraphic sequence, rock and soil name corresponding to the stratigraphic layer, rock and soil class name, geological origin, stratigraphic age, age code, realm, system, system and geological description.

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