CN113235950A - High-altitude installation method for single-layer latticed shell - Google Patents
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
- E04G21/14—Conveying or assembling building elements
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- E—FIXED CONSTRUCTIONS
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- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
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- E04B1/34—Extraordinary structures, e.g. with suspended or cantilever parts supported by masts or tower-like structures enclosing elevators or stairs; Features relating to the elastic stability
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Abstract
The invention discloses a high-altitude installation method of a single-layer latticed shell, which belongs to the technical field of building construction and comprises the following steps: designing and assembling a steel truss platform; building a lattice column supporting system on the steel net rack platform; supporting the latticed shell unit to be constructed on the latticed column supporting system; controlling the steel truss platform to ascend until the reticulated shell unit to be constructed reaches an installation position; splicing the latticed shell unit to be constructed and the installed latticed shell unit at the installation position; and releasing the constraint between the latticed shell unit to be constructed and the latticed column supporting system, and controlling the steel truss platform to descend to the initial position. The invention can complete the high-altitude installation of the large-scale single-layer complex curved surface reticulated shell structure.
Description
Technical Field
The invention relates to the technical field of building construction, in particular to a high-altitude installation method for a single-layer latticed shell.
Background
With the rapid popularization of steel structure buildings, the latticed shell structure is widely promoted based on the advantages of reasonable stress, large span, large rigidity, stable structure and the like.
Integral hoisting is one of the methods often used in the construction of reticulated shell structures.
However, as the building model of the newly-built latticed shell structure is more and more novel, the structural form is more and more complex, the building scale is more and more huge, and part of the large single-layer complex curved latticed shell structure is hoisted after being integrally assembled, and the whole hoisting is difficult due to the large span and weight.
Therefore, a single-layer latticed shell high-altitude installation method is needed to solve the above problems.
Disclosure of Invention
The invention aims to provide a high-altitude mounting method for a single-layer latticed shell, which can be used for completing high-altitude mounting of a large single-layer complex curved latticed shell structure.
As the conception, the technical scheme adopted by the invention is as follows:
a single-layer latticed shell aerial installation method for installing a latticed shell structure onto a latticed shell support substructure, the latticed shell structure comprising a latticed shell unit to be constructed and an installed latticed shell unit, the installed latticed shell unit being installed on an upper surface of the latticed shell support substructure, the single-layer latticed shell aerial installation method comprising the steps of:
s1, designing and assembling a steel truss platform;
s2, building a lattice column supporting system on the steel truss platform;
s3, supporting the latticed shell unit to be constructed on the latticed column supporting system;
s4, controlling the steel truss platform to ascend until the reticulated shell unit to be constructed reaches an installation position;
s5, splicing the latticed shell unit to be constructed and the installed latticed shell unit at the installation position;
s6, removing the constraint between the latticed shell unit to be constructed and the latticed column supporting system, and controlling the steel truss platform to descend to the initial position.
Optionally, before the step S1, the following steps need to be executed:
s01, determining a positioning coordinate in a deepening design stage by adopting a reticulated shell node space coordinate control technology;
and S02, performing a deepening design stage, establishing an integral construction calculation model, and performing finite element simulation in an actual construction process to determine a deformation pre-adjustment value and a stress monitoring early warning value of the selected structure in the construction stage.
Optionally, the step S01 includes:
s011, determining node displacement generated by the to-be-constructed latticed shell unit during unloading;
s012, determining the relative displacement between the nodes and the lifting points of the to-be-constructed latticed shell unit in the integral lifting process of the steel truss platform and the to-be-constructed latticed shell unit;
s013, subtracting the node displacement and the relative displacement on the basis of the design coordinates of the to-be-constructed latticed shell unit nodes to obtain the positioning coordinates.
Optionally, in step S4, the steel lattice platform is lifted by using a lifting device.
Optionally, the step S02 includes:
s021, establishing an integral construction calculation model of the steel net rack platform, the lattice column supporting system, the to-be-constructed latticed shell unit, the lifting equipment, the installed latticed shell unit and the latticed shell support lower structure;
s022, carrying out finite element simulation of an actual construction process, and analyzing interaction among the steel grid frame platform, the lattice column supporting system, the to-be-constructed latticed shell unit and the installed latticed shell unit;
s023, determining the deformation pre-adjustment values and the stress monitoring early warning values of the steel net rack platform, the to-be-constructed latticed shell unit and the installed latticed shell unit in a construction stage.
Optionally, in step S4, the steel grid structure platform, the to-be-constructed lattice shell unit and the installed lattice shell unit are all provided with deformation monitoring control points and stress monitoring control points, each deformation value of the deformation monitoring control points is monitored in real time, each stress value of the stress monitoring control points is monitored in real time, and the construction scheme is adjusted according to the monitored deformation value and the monitored stress value.
Optionally, the deformation value of each deformation monitoring control point is compared with the deformation preset value of the deformation monitoring control point in real time, the stress value of each stress monitoring control point is compared with the stress monitoring early warning value of the stress monitoring control point in real time, and if the comparison result shows that the deformation value and the stress value are both within a controllable range, the step S4 is continuously executed; otherwise, an early warning is provided, and the step S01 is executed in a returning way.
Optionally, in the step S6, the lateral constraint between the latticed shell unit to be constructed and the latticed column support system is released, and the steel truss platform and the latticed column support system are controlled to synchronously descend to the initial position.
Optionally, the lattice column support system includes a plurality of lattice columns arranged vertically and at intervals.
Optionally, in the step S1, the steel truss platform is assembled on a ground jig.
According to the high-altitude installation method of the single-layer latticed shell, the latticed shell structure is divided into the latticed shell unit to be constructed and the latticed shell unit installed, high-altitude sectional installation of the latticed shell structure can be achieved, and the method can be suitable for installation of large single-layer complex curved latticed shell structures. After the single-layer latticed shell is installed, the restraint between the latticed column supporting system and the latticed shell is removed, and the steel mesh frame platform is controlled to drive the latticed column supporting system to integrally descend.
Drawings
Fig. 1 is a positional relationship diagram of each component in step S3 in the single-layer reticulated shell high-altitude installation method provided by the embodiment of the present invention;
fig. 2 is a schematic diagram of a steel net rack platform in a lifting process in the single-layer latticed shell high-altitude installation method provided by the embodiment of the invention;
FIG. 3 is a schematic diagram of a planned construction latticed shell unit arriving at an installation position in a single-layer latticed shell overhead installation method provided by the embodiment of the invention;
FIG. 4 is a schematic diagram of a steel framework platform descending after splicing of a latticed shell unit to be constructed and an installed latticed shell unit is completed in the single-layer latticed shell high-altitude installation method provided by the embodiment of the invention;
fig. 5 is a flowchart of a high-altitude installation method of a single-layer reticulated shell according to an embodiment of the present invention.
In the figure:
1. a steel truss platform; 2. a lattice column support system; 3. planning to construct a reticulated shell unit; 4. steel strand wires; 5. lifting equipment; 6. the reticulated shell element is installed; 7. and (4) a latticed shell support substructure.
Detailed Description
In order to make the technical problems solved, the technical solutions adopted and the technical effects achieved by the present invention clearer, the technical solutions of the present invention are further described below by way of specific embodiments with reference to the accompanying drawings. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some but not all of the elements associated with the present invention are shown in the drawings.
Along with the building modeling of newly-built reticulated shell structure is more and more novel, and the structural style is more and more complicated, and the building scale is more and more huge, and its high altitude integral hoisting operation's degree of difficulty also improves day by day.
Referring to fig. 1-5, the present embodiment provides a single layer latticework aerial installation method for mounting a latticework structure to a latticework support substructure 7.
Specifically, in this embodiment, the latticed shell structure comprises the latticed shell unit 3 to be constructed and the installed latticed shell unit 6, the installed latticed shell unit 6 is installed on the upper surface of the latticed shell support substructure 7 through the latticed shell support, and the single-layer latticed shell overhead installation method comprises the following steps:
s1, designing and assembling a steel net rack platform 1;
specifically, in step S1, the steel truss platform 1 is designed according to the construction site conditions, the span and the weight of the planned construction reticulated shell unit 3; a steel net rack platform 1 is assembled on the ground jig frame.
S2, building a lattice column supporting system 2 on the steel truss platform 1;
specifically, in this embodiment, the lattice column support system 2 includes a plurality of vertical lattice columns that just set up at the interval, builds lattice column support system 2 on steel framework platform 1 according to the space configuration of planning construction latticed shell unit 3, ensures to plan that construction latticed shell unit 3 can receive even holding power. Specifically, the lattice column support system 2 is welded to the upper surface of the steel grid deck 1.
S3, supporting the latticed shell unit 3 to be constructed on the latticed column supporting system 2;
specifically, in step S3, the latticed shell unit 3 to be constructed is placed on the lattice column support system 2 and limited by the horizontal limiting device.
S4, controlling the steel truss platform 1 to ascend until the reticulated shell unit 3 to be constructed reaches the installation position;
specifically, in step S4, the steel lattice platform 1 is lifted using the lifting device 5; in particular, the lifting device 5 is arranged on the cell support substructure 7.
Specifically, in step S4, the steel-mesh-framed platform 1 is preferably lifted to the design elevation by using a through hydraulic jack synchronously controlled by a computer. The lifting device 5 lifts the steel net rack platform 1 through the steel strands 4. One end of the steel strand 4 is connected with the steel mesh frame platform 1 through a steel anchor, and the other end is connected with the lifting equipment 5 through an anchor sheet of the straight-through hydraulic jack.
S5, splicing the latticed shell unit 3 to be constructed and the installed latticed shell unit 6 at the installation position;
specifically, in step S5, the latticed shell unit 3 to be constructed is already located at the high altitude, and the joining of the rod members is completed at this time, so that the installation of the latticed shell unit 3 to be constructed is completed.
S6, removing the restraint between the reticulated shell unit 3 to be constructed and the lattice column support system 2, and controlling the steel truss platform 1 to descend to the initial position;
specifically, after the installation of the to-be-constructed reticulated shell unit 3 is completed, the steel truss platform 1 and the lattice column support system 2 need to be lowered to the initial position.
Specifically, in step S6, the lateral constraint between the reticulated shell unit 3 to be constructed and the lattice column support system 2 is released, so that the lattice column support system 2 only bears the vertical dead weight of the reticulated shell structure; and controlling the steel grid platform 1 and the lattice column supporting system 2 to synchronously descend by adopting a computer synchronously controlled through hydraulic jack until the top ends of all lattice columns are separated from the latticed shell structure, and then controlling the steel grid platform 1 and the lattice column supporting system 2 to synchronously descend to the initial position.
According to the high-altitude installation method for the single-layer latticed shell, the latticed shell structure is divided into the latticed shell unit 3 to be constructed and the latticed shell unit 6 which is installed, high-altitude sectional installation of the latticed shell structure can be achieved, and the method can be suitable for installation of the large-scale single-layer complex curved latticed shell structure.
After the single-layer latticed shell is installed, the restraint between the latticed column supporting system 2 and the latticed shell is removed, and the steel truss platform 1 is controlled to drive the latticed column supporting system 2 to integrally descend.
Further, in order to achieve accurate installation of the single-layer reticulated shell structure, in this embodiment, before step S1, the following steps are also performed:
s01, determining a positioning coordinate in a deepening design stage by adopting a reticulated shell node space coordinate control technology;
and S02, performing a deepening design stage, establishing an integral construction calculation model, and performing finite element simulation in an actual construction process to determine a deformation pre-adjustment value and a stress monitoring early warning value of the selected structure in the construction stage.
The node space coordinates of the latticed shell structure are important indexes reflecting construction precision. When the single-layer latticed shell high-altitude installation method is adopted for latticed shell structure construction, besides the deformation of the latticed shell structure in the unloading process, the coordinated deformation of the steel truss platform 1 and the latticed shell structure is also considered. Through the spatial coordinate control technology of the latticed shell nodes, all the nodes of the constructed latticed shell structure are closer to the node design coordinates.
Specifically, in this embodiment, step S01 includes:
s011, determining node displacement generated by the to-be-constructed latticed shell unit 3 during unloading;
specifically, in step S011, each lattice shell node displacement generated in the unloading process of the lattice shell structure is obtained through structural construction process analysis and calculation.
S012, determining the relative displacement between the nodes and the lifting points of the to-be-constructed latticed shell unit in the integral lifting process of the steel net rack platform 1 and the to-be-constructed latticed shell unit 3;
specifically, in step S012, the relative displacement of each lattice shell node with respect to the lifting point of the steel lattice frame platform 1 during the whole lifting process of the structure is obtained through structural construction process analysis and calculation.
And S013, subtracting node displacement and relative displacement on the basis of the design coordinates of the nodes of the reticulated shell unit to be constructed to obtain positioning coordinates.
Specifically, in step S013, the positioning coordinates can be used as positioning coordinates for deep design, component machining, and field installation. And the positioning coordinates are obtained by a reticulated shell node space coordinate control technology, so that each node of the constructed reticulated shell structure is closer to the node design coordinates.
The engineering implementation phase is a dynamically changing process. In the stage of making a scheme, a designer cannot consider the influence of all adverse factors, particularly dynamic factors such as load conditions, boundary conditions, actual attached main body structures and structural rigidity of a construction measure platform and simulation result difference in the construction process, so that the digital simulation and engineering implementation need to be linked, namely, a digital simulation program is timely adjusted according to the dynamic change of construction and is analyzed in real time, the dynamic change of the scheme is judged according to the analysis result, and the construction scheme is actively adjusted if necessary. Therefore, the monitoring and engineering implementation integrated linkage technology of the latticed shell construction process is needed to be used for monitoring and adjusting the construction process.
Specifically, the latticed shell construction process monitoring and engineering implementation integrated linkage technology comprises a step S02 and a step S4.
Specifically, in this embodiment, step S02 includes:
s021, establishing an integral construction calculation model of the steel net rack platform 1, the lattice column supporting system 2, the to-be-constructed latticed shell unit 3, the lifting equipment 5, the installed latticed shell unit 6 and the latticed shell support substructure 7;
s022, carrying out finite element simulation of an actual construction process, and analyzing interaction among the steel grid frame platform 1, the lattice column supporting system 2, the to-be-constructed latticed shell unit 3 and the installed latticed shell unit 6;
s023, determining deformation pre-adjustment values and stress monitoring early warning values of the steel net rack platform 1, the to-be-constructed net shell unit 3 and the installed net shell unit 6 in the construction stage; that is, in the present embodiment, the steel truss platform 1, the to-be-constructed reticulated shell unit 3 and the installed reticulated shell unit 6 are selected structures.
Specifically, in step S023, stress and deformation monitoring points at the construction stage are determined according to the finite element construction process simulation result. In principle, it is necessary to monitor the rod members near the support, the rod members with large change range of internal force in the construction process and the rod members with large absolute internal force.
Furthermore, the integrated linkage technology for monitoring the latticed shell construction process and implementing engineering further comprises the step of monitoring and comparing the stress and deformation monitoring point positions in real time in the construction process. The method specifically comprises the following steps: in step S4, deformation monitoring control points and stress monitoring control points are set on the steel truss platform 1, the to-be-constructed lattice shell unit 3 and the installed lattice shell unit 6, the deformation value of each deformation monitoring control point is monitored in real time, the stress value of each stress monitoring control point is monitored in real time, and the construction scheme is adjusted according to the monitored deformation value and stress value.
Further, in step S4, the deformation value of each deformation monitoring control point is compared with the deformation preset value of the deformation monitoring control point in real time, the stress value of each stress monitoring control point is compared with the stress monitoring early warning value of the stress monitoring control point in real time, and if the comparison result shows that the deformation value and the stress value are both within the controllable range, the step S4 is continuously executed; otherwise, an early warning is provided, and the step S01 is executed in a returning way.
Specifically, in this embodiment, the single-layer reticulated shell high-altitude installation method includes: the construction measure steel net rack platform device technology based on the structure integral lifting, the latticed shell structure integral synchronous unloading technology based on the structure integral descending, the latticed shell node space coordinate control technology and the latticed shell construction process monitoring and engineering implementation integrated linkage technology.
The construction measure steel net rack platform device technology based on the structure integral lifting mainly solves the technical problem that the flexible net shell unit sub-blocks are integrally lifted to a design coordinate along with the rigid construction measure steel net rack platform; the unloading of the flexible reticulated shell unit sub-blocks can be realized based on the reticulated shell structure integral synchronous unloading technology of the integral descending structure; the spatial coordinate control technology of the latticed shell node mainly solves the deformation coordination problem of a main latticed shell structure and a measure steel net rack platform structure, and provides a quantized theoretical deformation numerical value so as to improve the installation precision of the latticed shell node coordinate; the integrated monitoring and engineering implementation linkage technology for the latticed shell construction process mainly tracks the changes of internal force and displacement generated by the changes of load conditions and boundary conditions in the whole construction process of the latticed shell structure and the measure steel grid structure platform structure, so that the construction safety is ensured.
Specifically, in this embodiment, the construction measure steel grid platform device technology based on the structure integral lifting includes steps S1 to S5; the integral synchronous unloading technology of the latticed shell structure based on the integral descending of the structure comprises the step S6; step S01 is a spatial coordinate control technology of the latticed shell node; and S02 and S4 are integrated linkage technologies of monitoring and engineering implementation of the latticed shell construction process.
The four major sub-techniques are buckled with each other to form a complete construction technique of a single-layer latticed shell structure with an ultra-large complex curved surface.
The foregoing embodiments are merely illustrative of the principles and features of this invention, which is not limited to the above-described embodiments, but rather is susceptible to various changes and modifications without departing from the spirit and scope of the invention, which changes and modifications are within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (10)
1. A single-layer latticed shell aerial installation method for installing a latticed shell structure onto a latticed shell support substructure (7), wherein the latticed shell structure comprises a latticed shell unit (3) to be constructed and an installed latticed shell unit (6), and the installed latticed shell unit (6) is installed on the upper surface of the latticed shell support substructure (7), the single-layer latticed shell aerial installation method comprising the steps of:
s1, designing and assembling the steel truss platform (1);
s2, building a lattice column supporting system (2) on the steel truss platform (1);
s3, supporting the latticed shell unit (3) to be constructed on the latticed column supporting system (2);
s4, controlling the steel truss platform (1) to ascend until the reticulated shell unit (3) to be constructed reaches an installation position;
s5, splicing the latticed shell unit (3) to be constructed and the installed latticed shell unit (6) at the installation position;
s6, releasing the restraint between the latticed shell unit (3) to be constructed and the latticed column supporting system (2), and controlling the steel truss platform (1) to descend to the initial position.
2. The single-layer reticulated shell overhead installation method according to claim 1, wherein before the step S1, the following steps are further performed:
s01, determining a positioning coordinate in a deepening design stage by adopting a reticulated shell node space coordinate control technology;
and S02, performing a deepening design stage, establishing an integral construction calculation model, and performing finite element simulation in an actual construction process to determine a deformation pre-adjustment value and a stress monitoring early warning value of the selected structure in the construction stage.
3. The single-layer reticulated shell overhead installation method according to claim 2, wherein the step S01 includes:
s011, determining node displacement generated by the to-be-constructed latticed shell unit (3) during unloading;
s012, determining the relative displacement between the nodes of the to-be-constructed latticed shell unit and lifting points in the integral lifting process of the steel truss platform (1) and the to-be-constructed latticed shell unit (3);
s013, subtracting the node displacement and the relative displacement on the basis of the design coordinates of the to-be-constructed latticed shell unit nodes to obtain the positioning coordinates.
4. The single-layer reticulated shell high-altitude installation method according to claim 2, wherein in the step S4, the steel grid platform (1) is lifted by using a lifting device (5).
5. The single-layer reticulated shell high-altitude installation method according to claim 4, wherein the step S02 comprises:
s021, establishing an integral construction calculation model of the steel net rack platform (1), the lattice column supporting system (2), the to-be-constructed latticed shell unit (3), the lifting equipment (5), the installed latticed shell unit (6) and the latticed shell support lower structure (7);
s022, carrying out finite element simulation of an actual construction process, and analyzing interaction among the steel net rack platform (1), the lattice column supporting system (2), the to-be-constructed latticed shell unit (3) and the installed latticed shell unit (6);
s023, determining the deformation pre-adjustment value and the stress monitoring early warning value of the steel truss platform (1), the to-be-constructed latticed shell unit (3) and the installed latticed shell unit (6) in a construction stage.
6. The single-layer latticed shell high-altitude installation method according to claim 5, wherein in step S4, deformation monitoring control points and stress monitoring control points are arranged on the steel truss platform (1), the latticed shell unit (3) to be constructed and the installed latticed shell unit (6), the deformation value of each deformation monitoring control point is monitored in real time, the stress value of each stress monitoring control point is monitored in real time, and the construction scheme is adjusted according to the monitored deformation value and the monitored stress value.
7. The single-layer reticulated shell high-altitude installation method according to claim 6, wherein the deformation value of each deformation monitoring control point is compared with the deformation preset value of the deformation monitoring control point in real time, the stress value of each stress monitoring control point is compared with the stress monitoring early warning value of the stress monitoring control point in real time, and if the comparison result shows that the deformation value and the stress value are both within a controllable range, the step S4 is continuously executed; otherwise, an early warning is provided, and the step S01 is executed in a returning way.
8. The single-layer reticulated shell overhead installation method according to any one of claims 1 to 7, wherein in the step S6, the lateral constraint between the reticulated shell unit (3) to be constructed and the lattice column support system (2) is released, and the steel lattice platform (1) and the lattice column support system (2) are controlled to synchronously descend to an initial position.
9. The single-layer reticulated shell overhead installation method according to any one of claims 1 to 7, wherein the lattice column support system (2) comprises a plurality of vertically spaced lattice columns.
10. The single-layer reticulated shell overhead installation method according to any one of claims 1 to 7, wherein in the step S1, the steel lattice platform (1) is assembled on a ground jig.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114809584A (en) * | 2022-05-11 | 2022-07-29 | 中国建筑第二工程局有限公司 | High-efficiency and high-precision jig frame and net rack assembling method |
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