CN115977399A - Method and system for mounting and measuring steel structure of terminal building - Google Patents
Method and system for mounting and measuring steel structure of terminal building Download PDFInfo
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- CN115977399A CN115977399A CN202310021058.3A CN202310021058A CN115977399A CN 115977399 A CN115977399 A CN 115977399A CN 202310021058 A CN202310021058 A CN 202310021058A CN 115977399 A CN115977399 A CN 115977399A
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Abstract
The invention provides a method and a system for mounting and measuring a steel structure of an airport terminal, wherein the method comprises the following steps: laying a plurality of control points by taking a steel structure construction area as a reference to form a construction control network; jointly measuring a plurality of control points by a joint measurement method to obtain observation data; carrying out adjustment calculation on the construction control network based on the observation data and according to adjustment theoretical constraint conditions, and adjusting control points according to the calculation result of the adjustment calculation so as to improve the construction lofting precision of the construction control network; acquiring the environmental temperature of a steel structure construction area, and constructing a relation model between the deformation of a steel structure in the steel structure construction area and the change of the environmental temperature based on the environmental temperature; calculating by combining the environmental temperature and the relation model to obtain the deformation error of the steel structure; adjusting the installation position of the steel structure according to the deformation error; and (5) installing a steel structure by taking the construction control net as a reference. The invention can improve the installation precision in the installation process of the steel structure.
Description
Technical Field
The invention belongs to the field of building measurement, and particularly relates to a method and a system for mounting and measuring a steel structure of a terminal building.
Background
The construction of the airport terminal building has a large number of steel structures, the steel structures are structures made of steel materials and are one of main building structure types, the structures mainly comprise steel beams, steel columns, steel trusses and other members made of section steel, steel plates and the like, rust removing and preventing processes such as silanization, pure manganese phosphating, washing and drying, galvanization and the like are adopted, and all the members or parts are usually connected by welding lines, bolts or rivets.
When the steel construction area of terminal building is great, and under the more condition of different construction teams, at the assembly in-process of terminal building unit or whole steel construction, the traditional measurement method that prior art adopted can make control point chaotic in the construction area to lead to every construction team's measurement accuracy to reduce easily, and measurement accuracy's reduction can lead to the pre-buried positional deviation of support great, and then appears the steel construction and assemble the problem of taking one's place the difficulty. The large embedded deviation is difficult to correct, the steel structure can only be forcibly assembled in place or the embedded plate and the support base plate are welded, but the forced in-place easily causes member bending or generates large secondary stress, changes the constraint condition of the steel structure support and generates certain construction potential safety hazards.
Disclosure of Invention
The invention provides a method and a system for mounting and measuring a steel structure of a terminal building, which aim to solve the problem of low mounting precision of the steel structure caused by low measurement precision of a steel structure construction area.
Based on the purpose, the invention provides a method for installing and measuring a steel structure of an airport terminal, which comprises the following steps:
laying a plurality of control points by taking a steel structure construction area as a reference to form a construction control network;
jointly measuring a plurality of control points by a joint measurement method to obtain observation data;
carrying out adjustment calculation on the construction control network based on the observation data and according to adjustment theoretical constraint conditions, and adjusting the control points according to the calculation result of the adjustment calculation so as to improve the construction lofting precision of the construction control network;
collecting the environmental temperature of the steel structure construction area, and constructing a relation model between the deformation of the steel structure in the steel structure construction area and the change of the environmental temperature based on the environmental temperature;
calculating to obtain the deformation error of the steel structure by combining the environment temperature and the relation model;
adjusting the installation position of the steel structure according to the deformation error;
and installing the steel structure by taking the construction control net as a reference.
Optionally, the step of laying a plurality of control points by using the steel structure construction area as a reference to form a construction control network includes the following steps:
laying a reference control point outside a steel structure construction area;
a plurality of construction control points are distributed at the edge position in the steel structure construction area, and the reference control point and the plurality of construction control points form a first-level control network;
and laying a plurality of free control points in the steel structure construction area based on the primary control network, wherein the primary control network and the free control points form a construction control network.
Optionally, the joint measurement method includes a GNSS measurement method, a high-elevation tower measurement point method, and a fixed measurement station-free corner network measurement method.
Optionally, the adjustment theory constraint condition includes a circumference condition, a pattern condition and a fixed azimuth angle condition.
Optionally, the adjusting the control points to improve the construction lofting accuracy of the construction control network based on the observation data and according to adjustment theoretical constraint conditions includes the following steps:
taking the observation data at the reference free control point of at least three construction control points and a plurality of free control points as a reference, performing circumference adjustment calculation according to the circumference condition, and adjusting the reference free control point according to the calculation result of the circumference adjustment calculation to improve the construction lofting precision of the construction control network;
and taking the observation data at any two of the construction control points and the reference free control point as references, performing fixed adjustment calculation according to the graph condition and the fixed azimuth angle condition, and adjusting the reference free control point according to the calculation result of the fixed adjustment calculation so as to improve the construction lofting precision of the construction control network.
Optionally, the observation data includes observation angle data at the control point and linear distance data between any two of the construction control points, and the step of performing fixed adjustment calculation by using the graphic condition and the fixed azimuth condition on the basis of the observation data at any two of the construction control points and the reference free control point, and adjusting the reference free control point according to the calculation result of the fixed adjustment calculation to improve the construction lofting accuracy of the construction control network includes the following steps:
taking the observation angle data at any two construction control points and the reference free control point as a reference, performing first fixed adjustment calculation according to the graph condition, and adjusting the reference free control point according to a calculation result of the first fixed adjustment calculation to improve the construction lofting precision of the construction control network;
and taking the observation angle data and the linear distance data at the reference free control point as references, performing second fixed adjustment calculation according to the fixed azimuth angle condition, and adjusting the reference free control point according to the calculation result of the second fixed adjustment calculation to improve the construction lofting precision of the construction control network.
Optionally, the collecting the environmental temperature of the steel structure construction area, and constructing a relation model between deformation of the steel structure in the steel structure construction area and change of the environmental temperature based on the environmental temperature includes the following steps:
constructing a uniform acquisition grid in the steel structure construction area;
respectively collecting the ambient temperature of each grid point in the uniform collection grid;
calculating by combining all the environmental temperature fitting to obtain a construction environmental coefficient set, and fitting out a construction environmental temperature field of the steel structure construction area;
and constructing a relation model between the deformation of the steel structure in the steel structure construction area and the change of the environmental temperature based on the construction environmental temperature field.
Optionally, the relationship model specifically includes:
Df＝B×(z-Z 0 )×L，
in the formula: df is the linear deformation amount of the steel structure, B is the linear expansion coefficient of the steel structure, Z is the construction environment temperature obtained by substituting the position coordinates of the steel structure into the construction environment temperature place, and Z is 0 And L is the standard temperature of the steel structure, and the linear length of the steel structure.
Optionally, the adjusting the mounting position of the steel structure according to the deformation error includes the following steps:
acquiring point location coordinates of any two point locations on the steel structure;
calculating the linear direction of the steel structure according to the two point position coordinates;
respectively calculating direction included angles between the linear direction and the three reference component directions;
calculating linear deformation quantities of the steel structure in the three reference component directions by combining the deformation error and the three direction included angles;
and adjusting the installation position of the steel structure based on the linear deformation amount.
Based on the same inventive concept, the invention also provides a system for installing and measuring the steel structure of the terminal building, which comprises a memory, a processor and a computer program stored on the memory and capable of running on the processor, wherein the processor executes the computer program to realize the method.
The beneficial effects of the invention are: from the above, the invention provides a method for installing and measuring a steel structure of a terminal building, which comprises the following steps: laying a plurality of control points by taking a steel structure construction area as a reference to form a construction control network; jointly measuring a plurality of control points by a joint measurement method to obtain observation data; carrying out adjustment calculation on the construction control network based on the observation data and according to adjustment theoretical constraint conditions, and adjusting the control points according to the calculation result of the adjustment calculation so as to improve the construction lofting precision of the construction control network; collecting the environmental temperature of the steel structure construction area, and constructing a relation model between the deformation of the steel structure in the steel structure construction area and the change of the environmental temperature based on the environmental temperature; calculating to obtain the deformation error of the steel structure by combining the environment temperature and the relation model; adjusting the installation position of the steel structure according to the deformation error, so that the installation precision of the steel structure in the installation process is improved; and the steel structure is installed by taking the construction control net as a reference, so that the installation precision of the steel structure in the installation process can be further improved.
Drawings
Fig. 1 is a schematic flow chart of a method for installing and measuring a steel structure of an airport terminal in one embodiment of the invention.
Fig. 2 is a schematic layout diagram of a construction control network according to an embodiment of the present invention.
Fig. 3 is a schematic flow chart of a method for installing and measuring a steel structure of an airport terminal in one embodiment of the invention.
Fig. 4 is a schematic flow chart of a method for installing and measuring a steel structure of an airport terminal in one embodiment of the invention.
Fig. 5 is a schematic flow chart of a method for installing and measuring a steel structure of an airport terminal in one embodiment of the invention.
Fig. 6 is a schematic flow chart of a method for measuring installation of a steel structure of a terminal building according to an embodiment of the present invention.
Fig. 7 is a schematic flow chart of a method for measuring installation of a steel structure of an airport terminal in one embodiment of the present invention.
Detailed Description
The embodiment of the invention discloses a method for installing and measuring a steel structure of a terminal building, which specifically comprises the following steps of:
and S101, laying a plurality of control points by taking a steel structure construction area as a reference to form a construction control network.
The steel structure construction area is an area including all steel structure installation and construction, the control points mainly include a reference control point, a construction control point and a free control point, and fig. 2 is a control point layout method in one implementation manner of this embodiment. The area surrounded by the boundary 4 is a steel structure construction area, a plurality of triangles 1 positioned outside the boundary 4 are reference control points, and the reference control points are used as high-level control points and are reference points of the whole project. On the basis of benchmark control point, arrange 6 construction control points respectively along steel construction regional inward flange, and 6 construction control points arrange respectively in six different position in steel construction region, triangle-shaped 2 in fig. 2, 6, 7 and be located steel construction regional lower limb's three triangle-shaped are the construction control point. And (4) laying the reference control points and the construction control points to form a primary control network of a steel structure construction area.
On the basis of a primary control network, a plurality of free control points are continuously distributed in a steel structure construction area, for example, circles 3 and 5 in fig. 2 are free control points, and the free control points can also be used for erecting a prism at the top of an instrument for rearview on the premise that a construction lofting and station surveying site is met. And forming a construction control network in the whole area by combining a plurality of free control points on the basis of the primary control network, wherein the formed construction control network is a three-level control network.
S102, jointly measuring a plurality of control points by a joint measurement method to obtain observation data.
The joint measurement method comprises a GNSS measurement method, a high-elevation tower measuring point method and a fixed measuring station-free corner network measurement method, and the GNSS measurement method is based on the following principles: the user receiver is placed at a control point, the distance between the satellite with the known position and the user receiver can be measured, and then the specific position of the receiver can be known by combining the data of a plurality of satellites. The GNSS measurement data is the distance between the satellite and the receiver. By measuring the distances between the receiver and the satellites, the precise position of the receiver, i.e. the position of the control point, can be calculated. The plane coordinate precision of the control point obtained by GNSS measurement is higher than that of conducting wire measurement and triangulation measurement, and a high-precision reference is provided for control and lofting in the construction process.
In the arrangement of control points in a first-level control network, a high-standard tower measuring point method can be adopted, a high-standard tower is arranged at the control points to serve as a measuring station, the method is different from the traditional ground control points, the high-standard tower is a tower-shaped or columnar control point which is 10-15m higher than the ground, and the tower is characterized in that the point location is stable, the sight range is large due to the fact that the high-standard tower is higher than the ground, observation is facilitated, the tower can serve as a rearview measuring point, and the tower can serve as a measuring station to perform point location lofting in the construction process.
The corner network measuring method without the fixed measuring station is characterized in that an instrument is freely erected at any control point on the basis of a primary control network, and the coordinates of the measuring station are determined according to the rear intersection principle, so that construction lofting is convenient to carry out. The observation data includes all construction measurement data measured at each control point, including but not limited to observation angle data at the control point, and straight line distance data between any two control points.
S103, carrying out adjustment calculation on the construction control network based on the observation data and according to adjustment theoretical constraint conditions, and adjusting control points according to calculation results of the adjustment calculation so as to improve the construction lofting precision of the construction control network.
Wherein, adjustment theory constraint conditions comprise a circumference condition, a graph condition and a fixed azimuth angle condition. The constraint definition of the circumference condition is: if the construction control network contains a midpoint polygon formed by a plurality of control points, a circumferential condition may exist. Whether the circumference condition can be listed specifically or not specifically needs to directly observe or indirectly calculate whether all angles exist on the middle point of the middle point polygon. If a midpoint polygon exists and all angles at the midpoint exist, then the circle condition can be listed for the graph. As shown in fig. 2, the circumference conditions can be listed by 6 construction control points and free control points 5 located in the construction area of the steel structure, so that the positions of the free control points 5 are constrained, and the station setting precision of the free control points 5 is improved.
The constraint definitions of the graphical conditions are: in the construction control network, if a triangulation network is formed by three control points, when triangulation network measurement is performed, if three internal angles of a single triangle in the triangulation network are observed and necessary data is obtained at the same time, a graphic condition exists. As long as any one of the interior angles in a single triangle is not sufficiently observed, the graphical condition cannot be listed. The specific content of the graphic condition is to constrain the control points by the internal angle sum of the triangle being equal to 180 °, and is also called the internal angle sum condition. As shown in fig. 2, the construction control points 6, the construction control points 7 and the free control points 5 may list graphic conditions, so as to restrict the positions of the free control points 5, thereby improving the station setting accuracy of the free control points 5.
The constraint definition of the fixed azimuth condition is: in the construction control network, the shortest straight line formed by the connection between two control points is used as a known edge, and the azimuth angle corresponding to the known edge is observed by taking a third control point outside the two control points as a reference. And calculating the lengths of the known edges and the angles of the azimuth angles through observation, and constructing a fixed azimuth angle condition through the known edge lengths and the azimuth angles on the basis of a trigonometric function. As shown in fig. 2, the construction control point 6, the construction control point 7 and the free control point 5 can construct a fixed azimuth condition, so as to constrain the position of the free control point 5, thereby improving the station setting precision of the free control point 5.
S104, collecting the environment temperature of the steel structure construction area, and constructing a relation model between the deformation of the steel structure in the steel structure construction area and the change of the environment temperature based on the environment temperature.
Wherein, in this embodiment, can be through evenly laying the net at steel construction area, set up temperature sensor in the net point position department of net, thereby can evenly gather a plurality of ambient temperature of steel construction area by the latticed, construct the construction area temperature field according to a plurality of ambient temperature and the grid point position coordinate that gather, data information such as the linear structure of combining construction area temperature field and steel construction at last, correlation coefficient, initial temperature constructs the relation model, the relation between the deformation of steel construction and the change of ambient temperature in the steel construction area is reflected to the relation model.
And S105, calculating to obtain the deformation error of the steel structure by combining the environment temperature and the relation model.
The method comprises the steps of firstly measuring to obtain position data of a steel structure, then substituting the position data into a temperature field of a construction area to obtain temperature data of the area where the steel structure is located, substituting the obtained temperature data serving as an environment temperature into a relation model, and calculating to obtain a deformation error of the steel structure.
And S106, adjusting the installation position of the steel structure according to the deformation error.
After the deformation error is obtained through calculation, the linear deformation quantity of the steel structure on the three-axis component is calculated according to the linear structure of the steel structure, so that the installation position of the steel structure can be adjusted more accurately according to the deformation error.
And S107, mounting a steel structure by taking the construction control network as a reference.
The implementation principle of one implementation manner in this embodiment is as follows:
after the construction control network is constructed, adjustment calculation is carried out on control points in the construction control network through adjustment theoretical constraint conditions, and the control points are adjusted according to calculation results of the adjustment calculation so as to improve construction lofting precision of the construction control network, and installation precision of a follow-up steel structure during installation is improved. In the steel structure installation process, the environmental temperature of a steel structure construction area can be collected, a relation model between the deformation of the steel structure and the change of the environmental temperature in the steel structure construction area is built based on the environmental temperature, the deformation error of the steel structure is obtained by combining the environmental temperature and the relation model, the installation position of the steel structure is adjusted according to the deformation error, and the installation precision of the steel structure during installation is further improved.
In one implementation of this embodiment, referring to fig. 3, the step S101 of laying a plurality of control points based on a steel structure construction area to form a construction control network specifically includes the following steps:
s201, laying a reference control point outside a steel structure construction area.
The number of the reference control points can be determined according to the specific requirements of the construction project, the reference control points are usually used as reference points of the whole construction project, and in the example shown in fig. 2, four triangles located outside the boundary 4 are all the reference control points.
S202, distributing and arranging a plurality of construction control points at the edge positions in the steel structure construction area.
In the example shown in fig. 2, the 6 triangles located within the boundary 4 are all construction control points, and the reference control point outside the steel structure construction area and the plurality of construction control points within the steel structure construction area may form a primary control network.
And S203, distributing a plurality of free control points in the steel structure construction area based on the primary control network.
The point positions of the free control points can be distributed in the whole steel structure construction area, forced centering rods are buried at the free control points, the adopted prisms can freely rotate left and right, up and down or can directly adopt 360-degree prisms, no measuring station is arranged on the free control points, and after a main route is set by adopting a closed wire, any prism which can be observed on a main control point by adopting a multi-measuring-return angle measuring program and a branch wire mode. In the construction process, the selection point of the free control point can be changed at any time according to specific conditions. The first-level control net and the plurality of free control points form a construction control net, and the formed construction control net is a third-level control net.
The implementation principle of one implementation manner in this embodiment is as follows:
the construction control network formed by the combined reference control points, the construction control points and the free control points has high construction lofting precision, and due to the arrangement of the free control points, the construction lofting can be carried out by a plurality of construction teams in any construction area in a rear intersection measuring mode, so that the time cost and the personnel investment are greatly saved, and the measurement lofting efficiency is improved.
In one implementation of this embodiment, referring to fig. 4, step S103, performing adjustment calculation on the construction control network according to adjustment theoretical constraint conditions based on the observation data, and adjusting the control points according to the calculation result of the adjustment calculation to improve the construction lofting accuracy of the construction control network specifically includes the following steps:
s301, taking observation data at a reference free control point in at least three construction control points and a plurality of free control points as a reference, performing circumference adjustment calculation according to circumference conditions, and adjusting the reference free control points according to a calculation result of the circumference adjustment calculation so as to improve the construction lofting precision of the construction control network.
As illustrated in fig. 2, the free control point 5 is located at the center of the steel structure construction area and can be used as a reference free control point, and the free control point 5 is used for construction measurement many times, so that higher position accuracy is required. The free control points 5 and the 6 construction control points in the boundary 4 can construct circumference condition constraints, the 6 construction control points are observed at the free control points 5 at the same time to obtain 6 horizontal observation angles, the constructed circumference condition constraints are that the sum of the 6 horizontal observation angles is 360 degrees, circumference adjustment calculation can be carried out on the free control points 5 according to the circumference condition constraints to adjust the free control points 5, and therefore the position accuracy of the free control points 5 is improved.
S302, taking observation data of any two construction control points and the reference free control point as a reference, performing fixed adjustment calculation according to a graph condition and a fixed azimuth angle condition, and adjusting the reference free control point according to a calculation result of the fixed adjustment calculation to improve the construction lofting precision of the construction control network.
The implementation principle of one implementation manner in this embodiment is as follows:
the traditional adjustment calculation mode is replaced by combining the circular adjustment calculation and the fixed adjustment calculation, adjustment calculation is carried out on the frequently used free control points, the point position accuracy of the free control points can be improved, and therefore the construction lofting accuracy of the steel structure is improved.
In one implementation of this embodiment, referring to fig. 5, the observation data includes observation angle data at the control point and linear distance data between any two construction control points, and step S302 is to perform fixed adjustment calculation according to the graph condition and the fixed azimuth angle condition with reference to the observation data at any two construction control points and the reference free control point, and adjust the reference free control point according to the calculation result of the fixed adjustment calculation to improve the construction lofting accuracy of the construction control network, specifically including the following steps:
s401, taking observation angle data of any two construction control points and the reference free control point as a reference, performing first fixed adjustment calculation through a graph condition, and adjusting the reference free control point according to a calculation result of the first fixed adjustment calculation to improve the construction lofting precision of the construction control network.
By way of example shown in fig. 2, the construction control point 6, the construction control point 7 and the reference free control point 5 form a single-triangle-shaped triangulation network, three observation angle data of × 567, × 576 and × 657 are obtained by measuring at the construction control point 6, the construction control point 7 and the reference free control point 5 respectively, so that a graph condition constraint × 567+ 576+ 657=180 °, a first fixed adjustment calculation can be performed on the free control point 5 according to the graph condition constraint to adjust the free control point 5, and accordingly the position accuracy of the free control point 5 is improved.
S402, taking observation angle data and straight line distance data at the reference free control point as references, performing second fixed adjustment calculation under the condition of a fixed azimuth angle, and adjusting the reference free control point according to a calculation result of the second fixed adjustment calculation to improve the construction lofting precision of the construction control network.
By way of example shown in fig. 2, the shortest straight line between the construction control point 6 and the construction control point 7 may be used as a known edge in the fixed azimuth condition, and the observation angle × (657) of the reference free control point 5 corresponding to the known edge may be used as an azimuth in the fixed azimuth condition, and a second fixed adjustment calculation is performed on the reference free control point 5 based on a trigonometric function and in combination with the known edge length and the azimuth angle to adjust the free control point 5, so as to improve the position accuracy of the free control point 5.
The implementation principle of one implementation manner in this embodiment is as follows:
for control points in the same triangulation network, a graphic condition and a fixed azimuth angle condition can be adopted for constraint, and adjustment precision of adjustment calculation can be improved through combined constraint, so that position precision of the control points is improved.
In one implementation manner of this embodiment, referring to fig. 6, the step S104 of acquiring an ambient temperature of the steel structure construction area, and building a relation model between deformation of the steel structure in the steel structure construction area and a change of the ambient temperature based on the ambient temperature specifically includes the following steps:
s501, constructing a uniform acquisition grid in a steel structure construction area.
In this embodiment, the grid pitch of the uniform collection grid may be 10m × 10m.
And S502, respectively collecting the ambient temperature of each grid point in the uniform collection grid.
In the present embodiment, the ambient temperature at each grid point is acquired by providing a temperature sensor at each grid point.
S503, combining all the environment temperature fitting calculations to obtain a construction environment coefficient set, and fitting a construction environment temperature field of a steel structure construction area.
The construction environment temperature field Z = f (x, y, A) can be fitted according to the environment temperatures of all grid points, wherein x and y are two-dimensional coordinate values of any point in a construction field, A is a construction environment coefficient set of the temperature field, and the construction environment coefficient set is also calculated through fitting of the environment temperatures of the known grid points.
S504, constructing a relation model between deformation of a steel structure and change of the environment temperature in the steel structure construction area based on the construction environment temperature field.
Wherein, the relation model is specifically as follows:
Df＝B×(Z-Z0)×L,
in the formula: df is the linear deformation amount of the steel structure, B is the linear expansion coefficient of the steel structure, Z is the construction environment temperature obtained by substituting the position coordinates of the steel structure into the construction environment temperature place, Z 0 Is the standard temperature of the steel structure and L is the linear length of the steel structure.
For example, if a steel structure has a linear length of 100m, a linear expansion coefficient B =1.2 × 10-5/° c, a standard temperature during machining in a workshop is 20 ℃, and an ambient temperature of an installation position of the steel structure is calculated as-15 ℃ by substituting position data of the steel structure into a construction environment temperature field, df =100 × 1.2 × 10-5 × (-15-20) = -0.042m can be calculated according to a relational model, and thus the linear deformation amount of the steel structure is 42mm.
The implementation principle of one implementation manner in this embodiment is as follows:
the construction environment temperature field of the steel structure construction area is fitted by acquiring the environment temperature of the steel structure construction area, so that the environment temperature of the steel structure during installation can be confirmed according to the installation position of the steel structure, and the linear deformation quantity of the steel structure can be accurately calculated according to the relation model between the deformation of the steel structure and the change of the environment temperature in the constructed steel structure construction area.
In one implementation manner of this embodiment, referring to fig. 7, the step S106 of adjusting the installation position of the steel structure according to the deformation error specifically includes the following steps:
s601, point location coordinates of any two point locations on the steel structure are collected.
The point location coordinates on the steel structure can be collected through a total station.
And S602, calculating the linear direction of the steel structure according to the coordinates of the two point positions.
And S603, respectively calculating direction included angles between the linear direction and the three reference component directions.
The three reference component directions of the steel structure refer to vector directions of the steel structure in a three-axis spatial coordinate axis based on three axes of xyz.
And S604, calculating linear deformation quantities of the steel structure in three reference component directions by combining the deformation errors and the included angles in the three directions.
Wherein, can construct the deformation error correction formula of steel construction: dfx = Df × cos α, dfy = Df × fcos β, dfz = Df × cos γ. In the formula: and the Dfx, the Dfy and the Dfz are components of the steel structure in three reference component directions respectively, and the alpha, the beta and the gamma are direction included angles between the linear direction of the steel structure and the three reference component directions respectively.
Assuming that the linear length of a certain steel structure is 100m, the linear expansion coefficient B =1.2 x 10 < -5 >/DEG C, the standard temperature during workshop processing is 20 ℃, the included angles between the steel structure and the x, y and z axes are all 45 DEG, and the ambient temperature of the installation position of the steel structure is calculated to be-15 ℃ by substituting the position data of the steel structure into a construction ambient temperature field. Then Df =100 × 1.2 × 10-5 × (-15-20) = -0.042m can be calculated according to the relational model, so that the linear deformation of the steel structure is 42mm, and Dfz =29mm and dfx = dfy =20mm can be calculated according to the deformation error correction formula of the steel structure, so that the linear deformation of the steel structure in the z-axis is 29mm, and the linear deformation in the x-axis and the y-axis is 20mm.
And S605, adjusting the installation position of the steel structure based on the linear deformation.
The calculation program of the linear deformation quantity can be arranged in the total station, the installation position of the steel structure is collected through the total station, and then spatial interpolation is carried out through the built-in program according to a site temperature model to obtain the environment temperature of the installation position of the steel structure.
The implementation principle of one implementation manner in this embodiment is as follows:
after the linear deformation amount of the steel structure is calculated, the specific deformation amount of the steel structure in three-axis component in space three-axis is calculated according to the linear structure data of the steel structure, the linear direction of the steel structure can be calculated by acquiring point location coordinates of any two point locations on the steel structure, direction included angles between the linear direction and three reference component directions are calculated, finally, the linear deformation amount of the steel structure in the three reference component directions is calculated by combining a deformation error and three direction included angles, and therefore the installation position of the steel structure is accurately adjusted based on the linear deformation amount.
The embodiment of the invention also discloses a system for installing and measuring the steel structure of the terminal building, which comprises a memory, a processor and a computer program which is stored on the memory and can run on the processor, wherein the processor executes the computer program to realize the method in any one of the embodiments.
The implementation principle of the embodiment is as follows:
through program calling, after the construction control network is constructed, adjustment calculation is carried out on control points in the construction control network through adjustment theoretical constraint conditions, and the control points are adjusted according to calculation results of the adjustment calculation so as to improve construction lofting precision of the construction control network, and the improvement of the installation precision of a subsequent steel structure during installation is facilitated. In the steel structure installation process, the environmental temperature of a steel structure construction area can be collected, a relation model between the deformation of the steel structure and the change of the environmental temperature in the steel structure construction area is built based on the environmental temperature, the deformation error of the steel structure is obtained by combining the environmental temperature and the relation model, the installation position of the steel structure is adjusted according to the deformation error, and the installation precision of the steel structure during installation is further improved.
Those of ordinary skill in the art will understand that: the discussion of any embodiment above is meant to be exemplary only, and is not intended to imply that the scope of the application is limited to these examples; within the context of this application, features from the above embodiments or from different embodiments may also be combined, steps may be implemented in any order, and there are many other variations of different aspects of one or more embodiments as described above in this application, which are not provided in detail for the sake of brevity.
It is intended that the one or more embodiments of the present application cover all such alternatives, modifications, and variations as fall within the broad scope of the present application. Therefore, any omissions, modifications, substitutions, improvements, and the like that may be made without departing from the spirit or scope of one or more embodiments of the present application are intended to be included within the scope of the present application.
Claims (10)
1. A method for installing and measuring a steel structure of an airport terminal building is characterized by comprising the following steps:
laying a plurality of control points by taking a steel structure construction area as a reference to form a construction control network;
jointly measuring a plurality of control points by a joint measurement method to obtain observation data;
carrying out adjustment calculation on the construction control network based on the observation data and according to adjustment theoretical constraint conditions, and adjusting the control points according to the calculation result of the adjustment calculation so as to improve the construction lofting precision of the construction control network;
collecting the environmental temperature of the steel structure construction area, and constructing a relation model between the deformation of the steel structure in the steel structure construction area and the change of the environmental temperature based on the environmental temperature;
calculating to obtain the deformation error of the steel structure by combining the environment temperature and the relation model;
adjusting the mounting position of the steel structure according to the deformation error;
and installing the steel structure by taking the construction control net as a reference.
2. The method for installing and measuring the steel structure of the airport terminal building according to claim 1, wherein the step of laying a plurality of control points by taking the construction area of the steel structure as a reference to form a construction control network comprises the following steps:
laying a reference control point outside a steel structure construction area;
a plurality of construction control points are distributed at the edge positions in the steel structure construction area, and the reference control points and the plurality of construction control points form a primary control network;
and laying a plurality of free control points in the steel structure construction area based on the primary control network, wherein the primary control network and the free control points form a construction control network.
3. The method as claimed in claim 1, wherein the joint survey method comprises GNSS measurement, high-elevation tower survey, and corner-net survey without fixed survey stations.
4. The method for installing and measuring the steel structure of the terminal building according to claim 2, wherein the method comprises the following steps: the adjustment theory constraint condition comprises a circumference condition, a graph condition and a fixed azimuth angle condition.
5. The method for installing and measuring the steel structure of the airport terminal building according to claim 4, wherein the step of performing adjustment calculation on the construction control network based on the observation data and according to adjustment theoretical constraint conditions and adjusting the control points according to the calculation result of the adjustment calculation to improve the construction lofting precision of the construction control network comprises the following steps:
taking the observation data at the reference free control point of at least three construction control points and a plurality of free control points as a reference, performing circumference adjustment calculation according to the circumference condition, and adjusting the reference free control point according to the calculation result of the circumference adjustment calculation to improve the construction lofting precision of the construction control network;
and taking the observation data at any two of the construction control points and the reference free control point as a reference, performing fixed adjustment calculation according to the graph condition and the fixed azimuth angle condition, and adjusting the reference free control point according to the calculation result of the fixed adjustment calculation to improve the construction lofting precision of the construction control network.
6. The method as claimed in claim 5, wherein the observation data includes observation angle data at the control points and linear distance data between any two of the construction control points, the method comprises performing fixed adjustment calculation according to the graphic condition and the fixed azimuth angle condition with reference to the observation data at any two of the construction control points and the reference free control point, and adjusting the reference free control point according to the calculation result of the fixed adjustment calculation to improve the construction lofting accuracy of the construction control network, and comprises the following steps:
taking the observation angle data at any two of the construction control points and the reference free control point as references, performing first fixed adjustment calculation according to the graph condition, and adjusting the reference free control point according to the calculation result of the first fixed adjustment calculation to improve the construction lofting precision of the construction control network;
and taking the observation angle data and the linear distance data at the reference free control point as references, performing second fixed adjustment calculation under the condition of the fixed azimuth angle, and adjusting the reference free control point according to a calculation result of the second fixed adjustment calculation so as to improve the construction lofting precision of the construction control network.
7. The method for installing and measuring the steel structure of the airport terminal building according to claim 1, wherein the steps of collecting the ambient temperature of the steel structure construction area and constructing a relation model between the deformation of the steel structure in the steel structure construction area and the change of the ambient temperature based on the ambient temperature comprise the following steps:
constructing a uniform acquisition grid in the steel structure construction area;
respectively collecting the ambient temperature of each grid point in the uniform collection grid;
calculating by combining all the environment temperature fitting to obtain a construction environment coefficient set, and fitting a construction environment temperature field of the steel structure construction area;
and constructing a relation model between the deformation of the steel structure in the steel structure construction area and the change of the environmental temperature based on the construction environmental temperature field.
8. The method for installing and measuring the steel structure of the terminal building according to claim 7, wherein the relationship model is specifically as follows:
Df＝B×(Z-Z 0 )×L，
in the formula: df is the linear deformation quantity of the steel structure, B is the linear expansion coefficient of the steel structure, Z is the construction environment temperature obtained by substituting the position coordinate of the steel structure into the construction environment temperature place, and Z is 0 And L is the standard temperature of the steel structure, and the linear length of the steel structure.
9. The method for installing and measuring the steel structure of the terminal building according to claim 1, wherein the step of adjusting the installation position of the steel structure according to the deformation error comprises the following steps:
collecting point location coordinates of any two point locations on the steel structure;
calculating the linear direction of the steel structure according to the two point position coordinates;
respectively calculating direction included angles between the linear direction and the three reference component directions;
calculating linear deformation quantities of the steel structure in the three reference component directions by combining the deformation error and the three direction included angles;
and adjusting the installation position of the steel structure based on the linear deformation.
10. Terminal building steel structure installation measuring system comprising a memory, a processor and a computer program stored on the memory and executable on the processor, characterized in that the processor when executing the computer program implements the method according to any of claims 1 to 9.
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