CN114912172A - Method for rapidly obtaining coordinates and elevation of excavation control point of foundation pit - Google Patents
Method for rapidly obtaining coordinates and elevation of excavation control point of foundation pit Download PDFInfo
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- CN114912172A CN114912172A CN202210471576.0A CN202210471576A CN114912172A CN 114912172 A CN114912172 A CN 114912172A CN 202210471576 A CN202210471576 A CN 202210471576A CN 114912172 A CN114912172 A CN 114912172A
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Abstract
The invention discloses a method for rapidly obtaining coordinates and elevations of excavation control points of a foundation pit, which comprises the following steps: acquiring a two-dimensional CAD basic drawing to obtain structural dimension parameters of each component of the foundation, and drawing a basic three-dimensional model through three-dimensional BIM software; adjusting the position of the model to make the seating direction of the model consistent with the seating direction of the building in the two-dimensional CAD drawing, and rechecking whether the coordinates of the control points of other buildings are accurate; and drawing a simulated soil layer model, buckling and shearing the three-dimensional foundation model and the simulated soil layer model, and then hiding the three-dimensional foundation model to obtain the entity model of the foundation pit and the coordinates and elevations of the excavation control points. According to the invention, the BIM software parameterized modeling is adopted to draw the three-dimensional foundation model for secondary processing, so that the coordinates and the elevation of the excavation control point of the foundation pit can be quickly and accurately obtained, the complicated calculation and repeated rechecking of engineering survey personnel are avoided, the time is greatly saved, the working efficiency is improved, and the construction period is shortened.
Description
Technical Field
The invention relates to the technical field of building construction, in particular to a method for quickly obtaining coordinates and elevations of foundation pit excavation control points.
Background
At present, the coordinates and elevation of excavation control points of foundation pits of buildings need to be calculated by engineering measurement personnel through control point coordinates given by a CAD drawing according to the dimension of a structure in the CAD drawing, for some structural complex nodes needing slope setting and component combination, a node rough sample needs to be drawn by using CAD, and the coordinates and elevation of each excavation control point are calculated, as shown in FIG. 1:
1. firstly, obtaining an excavation lower port contour line b of JSK2 (sump pit 2) according to the position of a raft thickness H & lt 500 & gt and a sump pit contour a, obtaining the distance between the contour b and the contour c according to the difference between a plate top elevation and a pit bottom elevation, and further obtaining an excavation upper port contour line c of JSK 2;
2. firstly, obtaining an excavation lower port contour line y of JSK1 (sump pit 1) according to the position of a raft thickness H equal to 500 and a sump contour x, obtaining the distance between the contour y and a contour z according to the difference between a plate top elevation and a pit bottom elevation, and further obtaining an excavation upper port contour line z of JSK 1;
3. and connecting the excavation upper opening line and the excavation lower opening line of the two water collecting pits.
4. And deleting the cut redundant auxiliary lines to obtain the profiles (namely excavation lines) with different elevations.
5. And rotating the finally obtained graph according to the inclination angle marked by the general plane graph, and moving the graph to a correct position according to the axis intersection point coordinate marked by the general plane graph.
6. And (5) the coordinates of the focus of the excavation line can be pointed out by using the coordinate marking command.
The method not only has overlong time consumption, but also has complicated and complex calculation process, is easy to make mistakes, and has higher requirements on the calculation and space imagination capability of measuring personnel.
Disclosure of Invention
In view of this, the present invention provides a method for quickly obtaining coordinates and elevation of foundation pit excavation control points, so as to solve the problems pointed out in the background art.
In order to achieve the purpose of the invention, the technical scheme is as follows:
a method for rapidly obtaining coordinates and elevations of foundation pit excavation control points comprises the following steps:
s1: acquiring a two-dimensional CAD basic drawing to obtain structural dimension parameters of each component of the foundation, and drawing a basic three-dimensional model through three-dimensional BIM software;
s2: the method comprises the steps of enabling the seating direction of a model to be consistent with the seating direction of a building in a two-dimensional CAD drawing by adjusting the position of the model, enabling a building control point coordinate given in the two-dimensional CAD drawing to be assigned to a corresponding position in a three-dimensional model by the function of 'appointing coordinates on points' in three-dimensional BIM software, and then rechecking whether the coordinates of other building control points are accurate or not by the function of 'coordinates of high points' in the three-dimensional BIM software;
s3: drawing a simulated soil layer model, buckling and shearing the three-dimensional base model and the simulated soil layer model mutually, hiding the three-dimensional base model after the buckling and shearing are finished, obtaining a solid model of the foundation pit, and then directly obtaining the coordinates and the elevation of the excavation control point of the foundation pit through the function of the coordinates of the elevation point in the three-dimensional BIM software.
As a further improvement of the present invention, in step S1, the basic three-dimensional model is drawn by the three-dimensional BIM software as follows:
(1) establishing a family of metric conventional models based on surfaces;
(2) creating lofting, entering a right vertical view, and drawing a cross-section contour line a, wherein the cross-section contour line is trapezoidal and comprises a first line segment, a second line segment, a third line segment, a fourth line segment and a fifth line segment, the length of the first line segment is equal to raft thickness h + sump depth, the length of the second line segment is equal to raft thickness h, an angle between the fourth line segment and the second line segment is m, and the angle m is equal to a lofting angle; the length of the third line segment is equal to the thickness h of the raft plate; the lengths of the fourth line segment and the fifth line segment are automatically obtained by driving the lengths of the first line segment, the second line segment and the third line segment and the angle m;
(3) returning to the plane view, and drawing a path b, namely a sump contour line;
(4) creating a stretching, drawing a contour line c, locking a stretching starting point with the pit bottom elevation-raft thickness h, and drawing an end point with the raft thickness h;
(5) and (3) creating hollow drawing, drawing a contour line d, locking a drawing starting point with the pit bottom elevation, and drawing an end point with the sump depth.
As a further improvement of the invention, the thickness h of the raft is 500mm, the depth of the water collecting pit is 1000mm, and the slope angle is 60 degrees.
The beneficial effects of the invention are: according to the invention, the BIM software parameterized modeling is adopted to draw the three-dimensional foundation model for secondary processing, so that the coordinates and the elevation of the excavation control point of the foundation pit can be quickly and accurately obtained, the complicated calculation and repeated rechecking of engineering survey personnel are avoided, the time is greatly saved, the working efficiency is improved, and the method plays a vital role in shortening the construction period.
(1) The three-dimensional shape of the model is driven and controlled by adjusting the parameter information of the model, so that the aim of rapid parametric modeling is fulfilled.
(2) The time for calculating the coordinates of the control points of the engineering survey personnel is saved.
(3) The accuracy of the coordinates and the elevation of the control points is improved, the possibility of construction errors and rework is reduced, the cost is saved, and the construction period of foundation pit excavation is shortened
(4) The work of coordinate calculation of engineering survey personnel is liberated, the working efficiency is improved, and the wage expenditure of a part of the engineering survey personnel is saved.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:
FIG. 1 is a schematic diagram illustrating calculation of coordinates and elevations of foundation pit excavation control points by a conventional method;
FIG. 2 is a schematic of a planing surface of a sump;
FIG. 3 is a right elevational view of the sump;
FIG. 4 is a schematic drawing of a sump contour line;
fig. 5 is a schematic diagram of creating a hollow stretch, drawing contour line d.
Detailed Description
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.
In order to make the technical solutions better understood by those skilled in the art, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only partial embodiments of the present application, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
As shown in fig. 2-4, a method for rapidly obtaining coordinates and elevation of foundation pit excavation control points includes the following steps:
s1: acquiring a two-dimensional CAD basic drawing to obtain structural dimension parameters of each component of the foundation, and drawing a basic three-dimensional model through three-dimensional BIM software; the method comprises the following specific steps:
(1) establishing a family of metric conventional models based on surfaces;
(2) creating lofting, entering a right elevation view, and drawing a cross-section contour line a as shown in fig. 3, wherein the cross-section contour line is trapezoidal and is composed of a first line segment 1, a second line segment 2, a third line segment 3, a fourth line segment 4 and a fifth line segment 5, the length of the first line segment 1 is equal to raft thickness h + sump depth, the length of the second line segment 2 is equal to raft thickness h, an angle between the fourth line segment 4 and the second line segment 2 is m, and the angle m is equal to a lofting angle; the length of the third segment 3 is equal to the thickness h of the raft; the lengths of the fourth line segment 4 and the fifth line segment 5 are automatically obtained by driving the lengths and the angle m of the first line segment 1, the second line segment 2 and the third line segment 3; wherein, the thickness h of the raft is 500mm, the depth of the water collecting pit is 1000mm, and the slope angle is 60 degrees.
(3) Returning to the plane view, and drawing a path b, namely a sump contour line;
(4) creating a stretching, drawing a contour line c, locking a stretching starting point with the pit bottom elevation-raft thickness h, and drawing an end point with the raft thickness h;
(5) and (3) creating hollow stretching, drawing a contour line d, locking a stretching starting point and a pit bottom elevation, and locking a stretching finishing point to a sump pit depth.
S2: the method comprises the steps of enabling the seating direction of a model to be consistent with the seating direction of a building in a two-dimensional CAD drawing by adjusting the position of the model, enabling a building control point coordinate given in the two-dimensional CAD drawing to be assigned to a corresponding position in a three-dimensional model by the function of 'appointing coordinates on points' in three-dimensional BIM software, and then rechecking whether the coordinates of other building control points are accurate or not by the function of 'coordinates of high points' in the three-dimensional BIM software;
s3: drawing a simulated soil layer model, buckling and shearing the three-dimensional base model and the simulated soil layer model mutually, hiding the three-dimensional base model after the buckling and shearing are finished, obtaining a solid model of the foundation pit, and then directly obtaining the coordinates and the elevation of the excavation control point of the foundation pit through the function of the coordinates of the elevation point in the three-dimensional BIM software.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement, component separation or combination and the like made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.
Claims (3)
1. A method for rapidly obtaining coordinates and elevations of foundation pit excavation control points is characterized by comprising the following steps:
s1: acquiring a two-dimensional CAD basic drawing to obtain structural dimension parameters of each component of the foundation, and drawing a basic three-dimensional model through three-dimensional BIM software;
s2: the method comprises the steps of enabling the seating direction of a model to be consistent with the seating direction of a building in a two-dimensional CAD drawing by adjusting the position of the model, enabling a building control point coordinate given in the two-dimensional CAD drawing to be assigned to a corresponding position in a three-dimensional model by the function of 'appointing coordinates on points' in three-dimensional BIM software, and then rechecking whether the coordinates of other building control points are accurate or not by the function of 'coordinates of high points' in the three-dimensional BIM software;
s3: drawing a simulated soil layer model, buckling and shearing the three-dimensional base model and the simulated soil layer model mutually, hiding the three-dimensional base model after the buckling and shearing are finished, obtaining a solid model of the foundation pit, and then directly obtaining the coordinates and the elevation of the excavation control point of the foundation pit through the function of the coordinates of the elevation point in the three-dimensional BIM software.
2. The method for rapidly obtaining the coordinates and the elevation of the foundation pit excavation control point according to claim 1, wherein in step S1, the basic three-dimensional model is drawn through three-dimensional BIM software as follows:
(1) establishing a family of metric conventional models based on surfaces;
(2) creating lofting, entering a right vertical view, and drawing a cross-section contour line a, wherein the cross-section contour line is trapezoidal and comprises a first line segment, a second line segment, a third line segment, a fourth line segment and a fifth line segment, the length of the first line segment is equal to raft thickness h + sump depth, the length of the second line segment is equal to raft thickness h, an angle between the fourth line segment and the second line segment is m, and the angle m is equal to a lofting angle; the length of the third line segment is equal to the thickness h of the raft; the lengths of the fourth line segment and the fifth line segment are automatically obtained by driving the lengths of the first line segment, the second line segment and the third line segment and the angle m;
(3) returning to the plane view, and drawing a path b, namely a sump contour line;
(4) creating a stretching, drawing a contour line c, locking a stretching starting point with the pit bottom elevation-raft thickness h, and drawing an end point with the raft thickness h;
(5) and (3) creating hollow drawing, drawing a contour line d, locking a drawing starting point with the pit bottom elevation, and drawing an end point with the sump depth.
3. The method for rapidly obtaining the coordinates and the elevation of the foundation pit excavation control point according to claim 2, wherein the thickness h of the raft is 500mm, the depth of the water collection pit is 1000mm, and the slope angle is 60 °.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210471576.0A CN114912172A (en) | 2022-04-29 | 2022-04-29 | Method for rapidly obtaining coordinates and elevation of excavation control point of foundation pit |
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| CN202210471576.0A CN114912172A (en) | 2022-04-29 | 2022-04-29 | Method for rapidly obtaining coordinates and elevation of excavation control point of foundation pit |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117131582A (en) * | 2023-10-27 | 2023-11-28 | 北京市第三建筑工程有限公司 | Rapid construction method and system for complex foundation pit engineering model |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117131582A (en) * | 2023-10-27 | 2023-11-28 | 北京市第三建筑工程有限公司 | Rapid construction method and system for complex foundation pit engineering model |
| CN117131582B (en) * | 2023-10-27 | 2024-02-23 | 北京市第三建筑工程有限公司 | Rapid construction method and system for complex foundation pit engineering model |
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