阅读说明：本技术 一种预制管道现场安装工艺 (Prefabricated pipeline field installation process ) 是由 杨贺同 龙道杰 董春龙 程定富 王树昂 赵海丽 于 2019-02-20 设计创作，主要内容包括：本发明的目的是提供一种预制管道现场安装工艺,用于对预制管道和管道件进行拼接,步骤包括：a.创建预制管道和管道件的模型；b.将预制管道的模型与管道件的模型进行拼接,其中,预制管道的模型与管道件的模型在拼接处重叠,形成重叠区域；c.测量重叠区域的尺寸数据,并根据重叠区域的尺寸数据计算出重叠区域在预制管道上对应的干涉区域；d.在预制管道上标识并切除干涉区域；e.将预制管道的剩余部分于切割处与管道件进行拼接。由于通过将预制管道的模型与管道件的模型进行拼接,得到重叠区域,并根据重叠区域的尺寸数据计算出重叠区域在预制管道上对应的干涉区域,因此预制管道的切割位置可以精确地确定,无需重复吊装比对。(The invention aims to provide a prefabricated pipeline field installation process, which is used for splicing a prefabricated pipeline and a pipeline piece, and comprises the following steps: a. creating a model of the prefabricated pipe and the pipe piece; b. splicing the model of the prefabricated pipeline and the model of the pipeline piece, wherein the model of the prefabricated pipeline and the model of the pipeline piece are overlapped at the splicing position to form an overlapping area; c. measuring the size data of the overlapping area, and calculating the corresponding interference area of the overlapping area on the prefabricated pipeline according to the size data of the overlapping area; d. marking and cutting off an interference area on the prefabricated pipeline; e. and splicing the rest part of the prefabricated pipeline with the pipeline piece at the cutting position. Because the model of the prefabricated pipeline and the model of the pipeline piece are spliced to obtain the overlapping area, and the corresponding interference area of the overlapping area on the prefabricated pipeline is calculated according to the size data of the overlapping area, the cutting position of the prefabricated pipeline can be accurately determined without repeated hoisting comparison.)

1. A prefabricated pipe field installation process for splicing a prefabricated pipe (1) and a pipe piece (2), characterized in that the steps of the prefabricated pipe field installation process comprise:

a. -creating a model of the pre-fabricated pipe (1) and the pipe piece (2);

b. splicing the model of the prefabricated pipe (1) and the model of the pipe piece (2), wherein the model of the prefabricated pipe (1) and the model of the pipe piece (2) are overlapped at the splicing position to form an overlapping area (A);

c. measuring the size data of the overlapping area (A), and calculating the corresponding interference area (R) of the overlapping area (A) on the prefabricated pipe (1) according to the size data of the overlapping area (A);

d. -marking and cutting off said interference region (R) on said prefabricated pipe (1);

e. splicing the remaining part of the prefabricated pipe (1) with the pipe piece (2) at the cutting position.

2. The prefabricated pipe field installation process of claim 1 wherein said prefabricated pipe (1) has an end portion (11) and said piping element (2) has a coupling portion (21); the end portion (11) has a first end face (111), the joint portion (21) has a second end face (211);

-during the splicing of the pattern of prefabricated pipes (1) to the pattern of pipe pieces (2), the end portion (11) overlaps the joint portion (21) at the splice, wherein the first end face (111) and the second end face (211) define the overlapping area (a);

the overlapping area (A) has an overlapping length (L) which is the distance between the first end face (111) and the second end face (211) in the direction of the axis of the model of the prefabricated pipe (1);

the interference region (R) is a region formed by points on the prefabricated pipe (1) which are at a distance from the first end face (111) in the axial direction of the prefabricated pipe (1) and are less than or equal to an interference length (S) corresponding to the overlap length (L).

3. The process for the on-site installation of a preformed pipe according to claim 2, wherein the line formed by the points of the preformed pipe (1) which are at a distance from the first end face (111) equal to the interference length (S) corresponding to the overlap length (L) in the direction of the axis of the preformed pipe (1) is the cutting line (C) of the preformed pipe (1);

-cutting off said interference region (R) along said cutting line (C).

4. The pre-cast duct field installation process as claimed in claim 2, wherein a first data acquisition point (111a) is marked on the first end face (111) and a second data acquisition point (211a) is marked on the second end face (211);

-measuring the coordinates of said first data acquisition point (111a) and creating a model of said pre-fabricated conduit (1) in a coordinate system according to the coordinates of said first data acquisition point (111 a);

-measuring the coordinates of the second data acquisition point (211a) and creating a model of the piece of piping (2) in the coordinate system from the coordinates of the second data acquisition point (211 a);

the overlap length (L) is equal to the distance of the first data acquisition point (111a) from the second end face (211) in the coordinate system.

5. The prefabricated pipe field installation process of claim 4, wherein said first data collection point (111a) is a point on an outer edge of said first end face (111); and/or the second data acquisition point (211a) is a point on an outer edge of the second end face (211).

6. Prefabricated pipeline field installation process according to claim 4, wherein said first data acquisition points (111a) are in a plurality and are uniformly distributed along the circumference of said first end face (111); and/or the second data acquisition points (211a) are plural in number and uniformly distributed along the circumference of the second end face (211).

7. Prefabricated pipeline field installation process according to claim 6, wherein the number of first data acquisition points (111a) is greater than or equal to eight; and/or the number of second data acquisition points (211a) is greater than or equal to eight.

8. Prefabricated pipeline field installation process according to claim 4, wherein a model of said first end face (111) is created in said coordinate system from coordinates of said first data acquisition point (111 a); -creating a model of the pre-fabricated pipe (1) in the coordinate system from the model of the first end face (111);

-creating a model of the second end face (211) in the coordinate system from the coordinates of the second data acquisition point (211 a); -creating a model of the piece of pipe (2) in the coordinate system from a model of the second end face (211).

9. The prefabricated pipe field installation process of claim 1, wherein said piping elements (2) are two in number; the two pipeline pieces (2) are respectively spliced with the two end parts (11) of the prefabricated pipeline (1).

10. A prefabricated pipeline field installation process as claimed in claim 9, characterised in that one of said two pieces of pipeline (2) is a buried pipeline and the other is a flange.

Technical Field

The invention relates to the technical field of pipeline installation, in particular to a field installation process of a prefabricated pipeline.

Background

At the present stage, the overall dimension of the prefabricated pipeline is measured by using measuring tools such as a total station or a tape measure in the traditional prefabricated pipeline installation, the overall dimension of the prefabricated pipeline is compared with the distance between installed pipeline pieces, the end part of the prefabricated pipeline is cut and repaired for the first time, and after the prefabricated pipeline is installed, the prefabricated pipeline is hoisted and introduced to an installation position through a crane to compare the installation dimension. And if the assembly can be in place, welding is carried out until the installation is finished, if the size deviation exists, the measurement can not be in place, the field is measured again, the pipeline is lifted out to a prefabricated field, secondary cutting and trimming are carried out, the pipeline is lifted into the prefabricated field for assembly for the third time after the secondary cutting and trimming is finished, and the steps of lifting, comparing and measuring are repeated until the assembly and the welding are finished.

The installation process has the disadvantages of complicated steps, multiple comparison and installation, inconvenience and hoisting cost consumption.

Disclosure of Invention

The invention aims to provide a field installation process of a prefabricated pipeline, which has the advantage of convenience in installation.

In order to achieve the purpose, the field installation process of the prefabricated pipeline is used for splicing the prefabricated pipeline and the pipeline piece, and comprises the following steps:

a. creating a model of the pre-fabricated conduit and the piece of conduit;

b. splicing the model of the prefabricated pipeline and the model of the pipeline piece, wherein the model of the prefabricated pipeline and the model of the pipeline piece are overlapped at the splicing position to form an overlapping area;

c. measuring the size data of the overlapping area, and calculating the corresponding interference area of the overlapping area on the prefabricated pipeline according to the size data of the overlapping area;

d. marking and cutting the interference area on the prefabricated pipeline;

e. splicing the remaining portion of the prefabricated pipe to the pipe piece at the cut.

The field installation process of the prefabricated pipe is further characterized in that the prefabricated pipe is provided with an end part, and the pipe piece is provided with a joint part; the end portion has a first end face and the joint portion has a second end face;

during splicing of the pattern of pre-formed pipe to the pattern of pipe elements, the end portions overlap the joint portions at the splice, wherein the first end face and the second end face define the overlap region;

the overlap region has an overlap length that is a distance between the first end face and the second end face in an axial direction along a pattern of the pre-formed pipe;

the interference area is an area formed by points, which are located at a distance from the first end surface in the axial direction of the prefabricated pipe and are less than or equal to the interference length corresponding to the overlapping length, on the prefabricated pipe.

The prefabricated pipeline field installation process is further characterized in that in the axial direction of the prefabricated pipeline, a line formed by points, which are away from the first end face by a distance equal to the interference length corresponding to the overlapping length, on the prefabricated pipeline is a cutting line of the prefabricated pipeline;

cutting off the interference region along the cutting line.

The prefabricated pipeline field installation process is further characterized in that a first data acquisition point is marked on the first end face, and a second data acquisition point is marked on the second end face;

measuring coordinates of the first data acquisition point, and creating a model of the prefabricated pipeline in a coordinate system according to the coordinates of the first data acquisition point;

measuring coordinates of the second data acquisition point and creating a model of the piece of pipe in the coordinate system from the coordinates of the second data acquisition point;

the overlap length is equal to a distance of the first data acquisition point from the second end face in the coordinate system.

The field installation process of the prefabricated pipeline is further characterized in that the first data acquisition point is a point on the outer edge of the first end face; and/or the second data acquisition point is a point on an outer edge of the second end face.

The field installation process of the prefabricated pipeline is further characterized in that the number of the first data acquisition points is multiple and the first data acquisition points are uniformly distributed along the circumferential direction of the first end face; and/or the number of the second data acquisition points is multiple and is uniformly distributed along the circumferential direction of the second end face.

The field installation process of the prefabricated pipeline is further characterized in that the number of the first data acquisition points is more than or equal to eight; and/or the number of second data acquisition points is greater than or equal to eight.

The field installation process of the prefabricated pipe is further characterized in that a model of the first end face is created in the coordinate system according to the coordinates of the first data acquisition point; creating a model of the pre-fabricated conduit in the coordinate system from the model of the first end face;

creating a model of the second end face in the coordinate system according to the coordinates of the second data acquisition point; creating a model of the tubular in the coordinate system from the model of the second end face.

The field installation process of the prefabricated pipeline is further characterized in that the number of the pipeline pieces is two; and the two pipeline pieces are respectively spliced with the two end parts of the prefabricated pipeline.

The field installation process of the prefabricated pipeline is further characterized in that one of the two pipeline pieces is a buried pipeline, and the other one of the two pipeline pieces is a flange.

The positive progress effects of the invention are as follows: the invention provides a prefabricated pipeline field installation process, which is used for splicing a prefabricated pipeline and a pipeline piece, and comprises the following steps: a. creating a model of the prefabricated pipe and the pipe piece; b. splicing the model of the prefabricated pipeline and the model of the pipeline piece, wherein the model of the prefabricated pipeline and the model of the pipeline piece are overlapped at the splicing position to form an overlapping area; c. measuring the size data of the overlapping area, and calculating the corresponding interference area of the overlapping area on the prefabricated pipeline according to the size data of the overlapping area; d. marking and cutting off an interference area on the prefabricated pipeline; e. and splicing the rest part of the prefabricated pipeline with the pipeline piece at the cutting position.

The model of the prefabricated pipeline and the model of the pipeline piece are spliced to obtain the overlapping area, and the corresponding interference area of the overlapping area on the prefabricated pipeline is calculated according to the size data of the overlapping area, so that the cutting position of the prefabricated pipeline can be accurately determined, the prefabricated pipeline can be cut only according to the edge of the interference area, and repeated hoisting comparison is not needed, so that the prefabricated pipeline field installation process provided by the invention has the advantages of convenience in installation and reliable quality.

Drawings

The above and other features, properties and advantages of the present invention will become more apparent from the following description of the embodiments with reference to the accompanying drawings, in which:

FIG. 1 is a schematic illustration of measurements taken on a prefabricated pipe;

FIG. 2 is a schematic view of a measurement taken on a piece of pipe;

FIG. 3A is a schematic view of a mold of the first end face;

FIG. 3B is a schematic view of a model of a prefabricated pipe;

FIG. 4A is a schematic view of a mold of a second end face;

FIG. 4B is a schematic view of a model of a piping element;

FIG. 5 is a schematic illustration of a model of a prefabricated pipe being spliced with a model of a piece of pipe;

FIG. 6 is a schematic view of a prefabricated pipe showing an interference zone at one end of the prefabricated pipe;

FIG. 7 is a schematic view of a prefabricated pipe showing an interference area at the other end of the prefabricated pipe;

fig. 8 is a schematic illustration of splicing a prefabricated pipe to a pipe piece.

Detailed Description

The present invention is further described in the following description with reference to specific embodiments and the accompanying drawings, wherein the details are set forth in order to provide a thorough understanding of the present invention, but it is apparent that the present invention can be embodied in many other forms different from those described herein, and it will be readily appreciated by those skilled in the art that the present invention can be implemented in many different forms without departing from the spirit and scope of the invention.

The following discloses embodiments or examples of various implementations of the subject technology. Specific examples of components and arrangements are described below to simplify the present disclosure, but these are merely examples and do not limit the scope of the invention. For example, if a first feature is formed over or on a second feature described later in the specification, this may include embodiments in which the first and second features are formed in direct contact, and may also include embodiments in which additional features are formed between the first and second features, such that the first and second features may not be in direct contact. Additionally, reference numerals and/or letters may be repeated among the various examples throughout this disclosure. This repetition is for the purpose of simplicity and clarity and does not in itself dictate a relationship between the various embodiments and/or configurations discussed. Further, when a first element is described as being coupled or coupled to a second element, the description includes embodiments in which the first and second elements are directly coupled or coupled to each other, as well as embodiments in which one or more additional intervening elements are added to indirectly couple or couple the first and second elements to each other.

It should be noted that fig. 1-8 are exemplary only, are not drawn to scale, and should not be construed as limiting the scope of the invention as actually claimed.

As shown in fig. 8, in the conventional installation of the prefabricated pipe 1, a measuring tool such as a total station 3 or a tape measure is used for measuring the external dimensions of the prefabricated pipe 1, the external dimensions are compared with the distances between the installed pipe pieces 2, the end of the prefabricated pipe 1 is cut and trimmed for the first time, and after the end is cut and trimmed, the prefabricated pipe 1 is hoisted and guided to an installation position by a crane to compare the installation dimensions. And if the assembly can be in place, welding is carried out until the installation is finished, if the size deviation exists, the measurement can not be in place, the field is measured again, the pipeline is lifted out to a prefabricated field, secondary cutting and trimming are carried out, the pipeline is lifted into the prefabricated field for assembly for the third time after the secondary cutting and trimming is finished, and the steps of lifting, comparing and measuring are repeated until the assembly and the welding are finished.

The installation process has complicated steps, needs to be compared and installed for many times, and is very inconvenient.

With continued reference to fig. 8, the duct element 2 may be two in number and already installed, with a fixed position. The two pipeline pieces 2 are respectively matched and connected with the two ends of the prefabricated pipeline 1. In an embodiment not shown, the number of the pipe members 2 may be only one, and one end of the prefabricated pipe 1 is fittingly connected to the pipe member 2. More specifically, one of the two piping elements 2 is a buried pipeline and the other is a flange.

In order to facilitate the installation process of the prefabricated pipe, in one embodiment of the present invention, the field installation process of the prefabricated pipe comprises the following steps:

a. creating a model of the prefabricated pipe 1 and the pipe piece 2; this step can be performed in the BIM software, but also in other kinds of building information model software.

BIM is a short for Building Information model (Building Information Modeling), BIM technology is a datamation tool applied to engineering design, construction and management, and is used for sharing and transmitting in the whole life cycle process of project planning, operation and maintenance by integrating the datamation and the informatization models of buildings, so that engineering technicians can correctly understand and efficiently deal with various Building Information, a foundation for cooperative work is provided for design teams and all parties including buildings and operation units, and important functions are played in the aspects of improving production efficiency, saving cost and shortening construction period.

When modeling is performed in the BIM software, parameters of the prefabricated pipe 1 and the pipe 2 need to be input into the BIM software. This parameter can be obtained by measuring the prefabricated pipe 1 and the pipe member 2 on site or according to design drawings.

The manner of measurement may be to use a total station 3 for measurement, as shown in fig. 1, 2. A Total Station, i.e. a Total Station type Electronic distance meter (Electronic Total Station), is a high-tech measuring instrument integrating light collection, mechanical measurement and electrical measurement, and is a surveying instrument system integrating horizontal angle, vertical angle, distance (slant distance, horizontal distance) and height difference measurement functions. Compared with the optical theodolite, the electronic theodolite changes the optical scale into the photoelectric scanning scale, and replaces manual optical micrometer reading with automatic recording and displaying reading, so that the angle measurement operation is simplified, and the generation of reading errors can be avoided. The total station is called because the instrument can be arranged once to complete all measurement work on the station. The method is widely applied to the field of precision engineering measurement or deformation monitoring of overground large-scale buildings, underground tunnel construction and the like.

After obtaining the parameters of the prefabricated pipe 1 and the pipe 2, inputting the parameters into the BIM software, and generating the model of the prefabricated pipe 1 and the pipe 2 in the coordinate system of the BIM software. The parameter of the prefabricated pipe 1 and the pipe member 2 may be the spatial coordinates of a plurality of points on the prefabricated pipe 1 and the pipe member 2. These points with spatial coordinates constitute a model of the prefabricated pipe 1 and the pipe piece 2. The process of creating a model of the pre-fabricated pipeline 1 and the pipeline pieces 2 will be described in detail later in connection with fig. 3A, 3B, 4A, 4B.

b. Splicing the model of the prefabricated pipeline 1 and the model of the pipeline piece 2, wherein the model of the prefabricated pipeline 1 and the model of the pipeline piece 2 are overlapped at the splicing position to form an overlapping area A; this step can be performed directly in the BIM software, for example by keeping the position of the model of the tubular element 2 unchanged in the above-mentioned coordinate system, and moving the model of the prefabricated tubular element 1 to the installation position in the coordinate system for splicing with the model of the tubular element 2. As shown in fig. 5, since the prefabricated pipe 1 has a dimensional deviation during the manufacturing process, for example, a length margin is provided, the model of the prefabricated pipe 1 also has a dimensional deviation, which is represented as: in the coordinate system of the BIM software, after the model of the prefabricated pipe 1 is moved to the installation position, the end of the model of the prefabricated pipe 1 interferes with the model of the pipe 2 to form an overlap area a. The presence of the overlap area a also represents the interference of the prefabricated pipe 1 with the pipe elements 2 during hoisting, i.e. the corresponding interference area R (shown in fig. 6) of the overlap area a on the prefabricated pipe 1, if the prefabricated pipe 1 is not cut and trimmed at the installation site. The installation position of the prefabricated pipe 1 can be a position where the central axis of the prefabricated pipe 1 is collinear with the axis of the pipe member 2.

c. Measuring the size data of the overlapping area A, and calculating the corresponding interference area R of the overlapping area A on the prefabricated pipeline 1 according to the size data of the overlapping area A; the measurement process of the overlapping area a can be performed in the coordinate system of the BIM software, for example, by calculating the distance between corresponding points on the prefabricated pipe 1 and the pipe member 2 to obtain the size data of the overlapping area a; there is a mathematical relationship between the interference region R and the overlap region a, for example the length dimension of the interference region R is equal to the length dimension of the overlap region a multiplied by a modeled scaling factor. The scale factor of the modeling is equal to the dimensional parameter of the prefabricated pipe 1 divided by the dimensional parameter of the model of the prefabricated pipe 1. For example, if the size of the model of the prefabricated pipe 1 is equal to the size when the size of the prefabricated pipe 1 is proportionally reduced to one percent, the scale factor of the model may be determined to be 100.

d. Marking and cutting an interference region R on the prefabricated pipeline 1; the position and size of the interference zone R is calculated and determined on the preformed pipe 1, the edge of the interference zone R being a cutting line, and the preformed pipe 1 is cut along the cutting line to cut the interference zone R from the preformed pipe 1.

e. The remaining part of the prefabricated pipe 1 is spliced to the pipe piece 2 at the cut. After the interference region R is cut from the preformed pipe 1, the remaining portion of the preformed pipe 1 can be spliced with the pipe member 2 without interference. After splicing, the remaining portion of the prefabricated pipe 1 may be welded to the pipe elements 2 at the splice.

The model of the prefabricated pipeline 1 and the model of the pipeline piece 2 are spliced to obtain the overlapping area A, and the corresponding interference area R of the overlapping area A on the prefabricated pipeline 1 is calculated according to the size data of the overlapping area A, so that the cutting position of the prefabricated pipeline 1 can be accurately determined, the cutting is carried out only according to the edge of the interference area R, and repeated hoisting comparison is not needed, so that the prefabricated pipeline field installation process provided by the invention has the advantage of convenience in installation.

In a particular embodiment, as shown in fig. 1, 2, 5, 6, 7, the prefabricated pipe 1 has an end portion 11, the pipe element 2 has a joint portion 21; the end portion 11 has a first end face 111, and the joint portion 21 has a second end face 211; during the splicing of the pattern of prefabricated pipes 1 with the pattern of pipe pieces 2, the end portions 11 overlap the joint portions 21 at the splice, wherein the first end surface 111 and the second end surface 211 define an overlap region a; the overlap area a has an overlap length L, which is a distance between the first end surface 111 and the second end surface 211 in an axial direction along the model of the prefabricated pipe 1; the interference region R is a region constituted by points on the prefabricated pipe 1 that are at a distance from the first end surface 111 that is less than or equal to the interference length S corresponding to the overlap length L in the axial direction of the prefabricated pipe 1. In this embodiment, the interference length S is equal to the overlap length L multiplied by a modeled scaling factor.

In the axial direction of the prefabricated pipeline 1, a line formed by points on the prefabricated pipeline 1, which are away from the first end surface 111 by a distance equal to the interference length S corresponding to the overlap length L, is a cutting line C of the prefabricated pipeline 1; the interference region R is cut along the cutting line C. In fig. 6 and 7, the cut line C has an annular shape centered on the central axis of the prefabricated pipe 1.

Referring to fig. 3A, 3B, 4A, 4B, in one embodiment, a first data acquisition spot 111a is marked on the first end face 111 and a second data acquisition spot 211a is marked on the second end face 211; measuring coordinates of the first data acquisition point 111a, and creating a model of the prefabricated pipe 1 in a coordinate system according to the coordinates of the first data acquisition point 111 a; measuring the coordinates of the second data acquisition site 211a and creating a model of the piece of piping 2 in the coordinate system from the coordinates of the second data acquisition site 211 a; the overlap length L is equal to the distance of the first data acquisition point 111a from the second end face 211 in the coordinate system.

In a more specific embodiment, the first data acquisition point 111a is a point on an outer edge of the first end face 111; and/or the second data acquisition point 211a is a point on the outer edge of the second end face 211.

In another embodiment, the number of the first data acquisition points 111a is plural and is uniformly distributed along the circumferential direction of the first end face 111; and/or the number of the second data acquisition points 211a is plural and uniformly distributed along the circumference of the second end face 211.

In one embodiment, not illustrated, the number of first data acquisition points 111a is greater than or equal to eight; and/or the number of second data acquisition points 211a is greater than or equal to eight. In the embodiment shown in fig. 1 and 2, the number of first data acquisition points 111a is 4, and the number of second data acquisition points 211a is also 4. The greater the number of first data acquisition points 111a, the more accurate the model of pre-fabricated conduit 1 is created, and the greater the number of second data acquisition points 211a, the more accurate the model of conduit piece 2 is created.

As shown in fig. 3A, 3B, a model of the first end face 111 is created in the coordinate system from the coordinates of the first data acquisition point 111 a; creating a model of the prefabricated pipe 1 in a coordinate system from the model of the first end face 111; as shown in fig. 3A and 3B, in one embodiment, the number of the first end surfaces 111 of the prefabricated pipe 1 is two, and the two end surfaces are respectively located at two ends of the prefabricated pipe 1, so that the number of the models of the first end surfaces 111 in the coordinate system of the BIM software is two. After the models of the two first end surfaces 111 are determined, on the basis of the models of the two first end surfaces 111, a corresponding model of the prefabricated pipe 1 can be generated in a coordinate system of BIM software according to a drawing of the prefabricated pipe 1. For example, the coordinates of the central axis of the prefabricated pipe 1 relative to the first end surface 111 can be obtained from the drawing of the prefabricated pipe 1, and a model of the central axis of the prefabricated pipe 1 can be generated in the coordinate system of the BIM software according to the coordinates, and then the complete prefabricated pipe 1 can be formed by adopting a fitting method in the coordinate system of the BIM software.

As shown in fig. 4A, 4B, a model of the second end face 211 is created in the coordinate system from the coordinates of the second data acquisition point 211 a; a model of the tubular element 2 is created in the coordinate system from the model of the second end face 211. As shown in fig. 4A, in one embodiment, the duct element 2 is two in number, each having a second end face 211. In the coordinate system of the BIM software, the number of models of the second end face 211 is two. After the model of the second end surface 211 is determined, on the basis of the model of the second end surface 211, a corresponding model of the pipe 2 may be generated in the coordinate system of the BIM software according to the drawing of the pipe 2. For example, the coordinates of the central axis of the pipe 2 relative to the second end surface 211 can be obtained from the drawing of the pipe 2, and from this coordinates, a model of the central axis of the pipe 2 can be generated in the coordinate system of the BIM software, and then a fitting means is adopted in the coordinate system of the BIM software to form a complete model of the pipe 2.

The determination of the model of the second end face 211 comprises the determination of the absolute position of the second end face 211 in the coordinate system of the BIM software, since at the installation site the piping element 2 has been installed and thus has a determined installation position. The coordinate system of the BIM software may be a simulation of the installation site, in which case the coordinates of the second data acquisition point 211a are absolute coordinates in the coordinate system of the BIM software which are invariable in a certain numerical value. The coordinates of the first data acquisition point 111a are relative coordinates with variable values in the coordinate system of the BIM software, and change along with the movement of the prefabricated pipe 1 in the coordinate system of the BIM software.

Although the present invention has been described with reference to the preferred embodiments, it is not intended to limit the present invention, and those skilled in the art can make modifications and variations without departing from the spirit and scope of the present invention.