CN111719870B - One-step forming installation method for electromechanical pipeline of super high-rise standard layer - Google Patents
One-step forming installation method for electromechanical pipeline of super high-rise standard layer Download PDFInfo
- Publication number
- CN111719870B CN111719870B CN202010641777.1A CN202010641777A CN111719870B CN 111719870 B CN111719870 B CN 111719870B CN 202010641777 A CN202010641777 A CN 202010641777A CN 111719870 B CN111719870 B CN 111719870B
- Authority
- CN
- China
- Prior art keywords
- installation
- platform
- unit module
- site
- supporting
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Classifications
-
- 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
-
- 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
- E04G1/00—Scaffolds primarily resting on the ground
- E04G1/15—Scaffolds primarily resting on the ground essentially comprising special means for supporting or forming platforms; Platforms
-
- 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
- E04G1/00—Scaffolds primarily resting on the ground
- E04G1/18—Scaffolds primarily resting on the ground adjustable in height
- E04G1/22—Scaffolds having a platform on an extensible substructure, e.g. of telescopic type or with lazy-tongs mechanism
-
- 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
- E04G1/00—Scaffolds primarily resting on the ground
- E04G1/24—Scaffolds primarily resting on the ground comprising essentially special base constructions; comprising essentially special ground-engaging parts, e.g. inclined struts, wheels
-
- 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
- E04G1/00—Scaffolds primarily resting on the ground
- E04G1/15—Scaffolds primarily resting on the ground essentially comprising special means for supporting or forming platforms; Platforms
- E04G2001/157—Extensible platforms, e.g. telescopic platforms
-
- 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
- E04G1/00—Scaffolds primarily resting on the ground
- E04G1/24—Scaffolds primarily resting on the ground comprising essentially special base constructions; comprising essentially special ground-engaging parts, e.g. inclined struts, wheels
- E04G2001/242—Scaffolds movable on wheels or tracks
Landscapes
- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Mechanical Engineering (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Sink And Installation For Waste Water (AREA)
- Supports For Pipes And Cables (AREA)
Abstract
The invention relates to a method for mounting electromechanical pipelines of a super high-rise standard layer in one-step molding, which comprises the steps of reviewing drawings, building a BIM model, decomposing prefabricated components, processing the components, mounting on site, testing, debugging and operating, and takes the BIM technology as a core, only simple component assembly is carried out on a construction site, so that the dynamic and electric operation on site is reduced, the welding operation on site is reduced, the high-rise operation on site and the cross operation on site are reduced, the processing components have certain reproducibility by reasonably decomposing and prefabricating the BIM comprehensive scheme, single-professional batch production is realized, the batch production of a single floor and the batch production of the whole standard layer are realized, the processing and mounting efficiency is effectively improved, a supporting and hanging bracket supporting beam is mounted by lifting a fixed linkage lifting platform to a corridor unit module, the mechanical and automatic supporting and hanging bracket mounting is realized, and the mounting efficiency can be further improved, synchronous lifting is realized in the electromechanical installation process, modularization and quick installation are realized, and the construction progress is effectively improved.
Description
Technical Field
The invention relates to a one-step forming installation method for an electromechanical pipeline of a super high-rise standard layer, and belongs to the technical field of electromechanical installation of constructional engineering.
Background
The electromechanical installation project is used as an important component of a modern building, has a great influence on the function of the building, how to fully utilize a prefabricated assembly type construction technology to complete the construction task of the electromechanical installation project becomes an important research subject in the development of the current electromechanical installation enterprise, and as a super high-rise building, a standard floor occupies 80 percent of the area, so the installation progress and the quality of the standard floor directly influence the integral image of the building.
Disclosure of Invention
The invention aims to provide a one-step forming installation method of an electromechanical pipeline of a super high-rise standard layer, which realizes mechanical automatic installation of a supporting and hanging frame by installing a supporting and hanging frame supporting beam by lifting a fixed linkage lifting platform to a corridor unit module, is safer and quicker compared with the traditional manual installation mode, can further improve the installation efficiency and quicken the progress of electromechanical installation engineering, takes a BIM technology as a core, combines site construction conditions and processing plant production conditions to manufacture prefabricated processing drawings, completes pipeline blanking, threading, cutting, painting and rust removal in a factory, only carries out simple component assembly on a construction site, reduces site dynamic and electric operation, reduces site welding operation, reduces site high-place operation and cross operation, greatly improves the installation benefit, reasonably decomposes prefabrication by a BIM comprehensive scheme, make its processing component have certain replicatability, realize single professional batch production, the batch production of single floor is even the batch production of whole standard layer, effectively improves processing installation effectiveness, realizes promoting in step in the electromechanical installation process, and the quick installation of modularization effectively improves the construction progress, can effectively solve the problem in the background art.
In order to solve the technical problems, the invention provides the following technical scheme:
a one-step forming installation method for an electromechanical pipeline of a super high-rise standard layer comprises the following steps: step a, reviewing drawings, namely reviewing an original design drawing, further knowing design intention, design key points, clarification doubt points, eliminating design defects and unifying ideas, combining the review condition of the original design drawing, solving the overall BIM deepening concept, discussing the superiority and inferiority of the BIM deepening scheme and rationality of single-professional decomposition processing, enabling the BIM deepening design to meet the standard requirement of 100%, meeting the requirement of an owner on clearance height and the requirement of later-stage operation and maintenance, meeting the site construction condition and effectively improving the electromechanical installation efficiency;
step b, building BIM model
Building a single professional model, building models of all professionals (a building model, a water heating electricity professional model and a support and hanger model) according to the situation of the joint examination of drawings, the requirement of an owner, the actual situation of a site and material parameters, integrating all the parameters of electromechanical pipelines and valves of a standard layer, including length, nominal diameter, outer diameter, thickness and connection mode, inputting deepening design software (revit) for parameterization through directly or re-building a family type form, summarizing the single professional model, and carrying out BIM comprehensive wiring deepening design by combining corresponding design construction specifications, the pertinence requirement of the owner, the actual situation of the site and the material parameter situation;
step c, decomposing the prefabricated part
According to the professional design, construction and acceptance specifications, field transportation conditions, actual installation conditions and material parameter conditions, performing single-professional decomposition and ensuring the installation feasibility and rationality of the decomposed components;
step d, processing the component
Processing and assembling centralized components of a processing plant according to a component decomposition drawing, and prefabricating and assembling the processing plant according to a support hanger drawing prototype and a construction and installation plan condition;
step e, field installation
Mounting the prefabricated and assembled support and hanger on an on-site standard layer, prefabricating and mounting the support and pipeline according to a drawing and a BIM comprehensive wiring scheme to finish the pre-mounting of the aisle unit module, and finally finishing the on-site mounting by a method of integrally lifting the aisle unit module;
step f, testing, debugging and running
Various pipelines in the pipeline are electrified, ventilated and water-through debugged, and normal use after installation is ensured.
Further, the step e includes:
installing branch pipeline components: before the branch pipeline is prefabricated and installed, the branch pipeline is prefabricated and assembled on the ground at a corresponding position, and a movable scaffold platform is set up according to the paying-off condition of the branch pipeline on site to assemble the branch pipeline on site;
secondly, mounting a hanging bracket: aiming at the tail end point of the DN25 pipeline, a gun is adopted to perform ground fixed point prefabrication, punching and mounting of a supporting and hanging bracket, so that the tail end point mounting procedure is effectively saved;
installing a corridor unit module: the corridor adopts an integral lifting installation method of the whole corridor unit module, accurate paying-off positioning is needed between installation, an assembly platform is erected at a corresponding position on the ground to assemble the unit module of the whole corridor, the corridor unit module comprises all electromechanical pipelines, connecting pieces, valve pieces and supporting and hanging frames of a single-face corridor, the assembly platform mainly comprises three fixed linkage lifting platforms, the sizes of the three loads are 2000kg, the sizes of the table tops are 2000 x 1500mm, the lifting height is 3500mm, the fixed flitch and the infrared ray instrument are fixed, after the corridor unit module is assembled, the lifting platforms are used for synchronous linkage type integral lifting installation, and after the corridor unit module is lifted to a specified height, the supporting and hanging frames are fixed efficiently by the supporting and hanging frame fixing platforms.
Further, the third step of e includes:
i, assembling electromechanical pipelines, connecting pieces and valve pieces, placing all pipelines at the top of channel steel according to a BIM comprehensive wiring scheme, and moving the channel steel to the top of a unit module supporting platform;
II, connecting all the pipelines according to a BIM comprehensive wiring scheme through flanges, connecting pieces and valve pieces, and fixing the aisle unit module between the movable baffle and the fixed baffle through a screw rod transmission mechanism;
III, adjusting the support and hanger fixing platform to a horizontal position through an adjusting screw, pre-fixing a support cross beam of the support and hanger on the top of the magnetic sleeve through a bolt, and driving the support cross beam of the support and hanger to be right below the support and hanger through a linear motor;
IV, carrying out synchronous linkage type integral lifting on the fixed linkage lifting platform by adopting a synchronous motor and a synchronous oil cylinder, and lifting the aisle unit module to a specified height;
and V, fixing the support cross beam of the support hanger to the bottom of the support hanger by using a driving motor and a hydraulic cylinder to finish lifting installation.
Further, the unit module supporting platform is fixedly connected to the top of the fixed linkage lifting platform, and the supporting and hanging bracket fixing platform is rotatably connected to the left side and the right side of the fixed linkage lifting platform through the adjusting screw rods.
Furthermore, the top of the unit module supporting platform is provided with a sliding groove, the fixed baffle is fixedly connected to the top of the unit module supporting platform, the movable baffle is connected to the top of the unit module supporting platform through the sliding groove, and the output end of the screw rod transmission mechanism is fixedly connected with the movable baffle.
Further, the support and hanger fixing platform is composed of a rotating platform, a hydraulic cylinder, a driving motor and a linear motor, the hydraulic cylinder is connected to the top of the rotating platform in a sliding mode, the driving motor is fixedly connected to the top of the hydraulic cylinder, the linear motor is fixedly connected to the top of the rotating platform, and the output end of the linear motor is fixedly connected with the hydraulic cylinder.
Further, the step c includes:
one-professional decomposition: according to the professional design, construction and acceptance specifications, field transportation conditions, actual installation conditions and material parameter conditions, performing single-professional decomposition and ensuring the installation feasibility and rationality of decomposed components, and compiling corresponding prefabricated component tables for the purposes of improving the prefabrication and processing efficiency, improving the field installation progress and reducing the material waste;
disassembling the passage component: the integrated lifting installation method is adopted in the concentrated area of the electromechanical pipelines of the passageway, the concentrated area is mainly divided into four faces of east, west, south and north according to the actual situation on site, lifting installation is carried out according to one unit module of each face, an assembly platform is erected under the corresponding position according to the paying-off situation on site by utilizing three fixed linkage lifting platforms with the load of 2000kg, the table-board size of 2000 x 1500mm and the lifting height of 3500mm, the passing module assembly of the whole face is carried out on the platform, and the linkage lifting installation is carried out by adopting a synchronous motor and a synchronous oil cylinder after the assembly is finished.
Further, the step d includes:
machining an electromechanical pipeline component: processing and assembling centralized components of a processing plant according to a component decomposition drawing;
secondly, prefabricating and assembling a hanging bracket: according to a gallows drawing big appearance and the construction installation plan condition, carry out the prefabricated equipment of processing factory, utilize the adjustability, the dismountability and the repeatability of a finished product gallows to improve the efficiency of construction greatly, guarantee construction quality.
Compared with the prior art, the invention has the following beneficial effects:
1. the top of the unit module supporting platform is provided with a screw rod transmission mechanism to drive the movable baffle plate to move, the aisle unit modules are driven to move, under the driving action of the screw rods, the connected aisle unit modules move more uniformly, the connection and installation between pipelines are facilitated, the aisle unit modules are more convenient compared with manual movement and more labor-saving at the same time, the left side and the right side of the fixed linkage lifting platform are provided with the support and hanger fixing platforms, when the fixed linkage lifting platform lifts the aisle unit modules, firstly, bolts are connected onto threaded holes on the support and hanger supporting cross beams in a threaded manner, the support and hanger fixing platforms are adjusted to be in a horizontal state, a magnetic sleeve is adjusted to be right below the support and hanger mounting holes through a linear motor, the bolts at the bottoms of the support and hanger supporting cross beams are placed inside the magnetic sleeves, and when the fixed linkage lifting platform lifts the aisle unit modules, the supporting and hanging bracket supporting beam can be synchronously lifted to the bottom of the aisle unit module, so that subsequent installation of a supporting and hanging bracket and a supporting and hanging bracket supporting beam is facilitated, after the supporting and hanging bracket supporting beam and the aisle unit module are lifted to the designated height, the supporting and hanging bracket supporting beam is driven to ascend through the hydraulic cylinder to enable bolts on the supporting and hanging bracket supporting beam to be in contact with threaded holes in the bottom of the supporting and hanging bracket, then a driving motor and the hydraulic cylinder are started to fix the supporting and hanging bracket supporting beam at the bottom of the supporting and hanging bracket through the bolts, the supporting and hanging bracket supporting beam can be installed by lifting the aisle unit module through the fixed linkage lifting platform, mechanical automatic supporting and hanging bracket installation is realized, compared with a traditional manual installation mode, the installation efficiency can be further improved, and the progress of an electromechanical installation project is accelerated;
2. as a super high-rise building, a standard floor occupies 80 percent of the area, so the installation progress and quality of the standard floor directly influence the integral image, the construction is carried out by adopting a standard floor prefabrication assembly type installation method, the influence of a plurality of uncontrollable factors on the installation progress and quality is avoided due to the change of a production mode, the normal installation progress is ensured, the installation quality is greatly improved, the processing components have certain reproducibility by reasonably decomposing and prefabricating a BIM comprehensive scheme, the single-professional batch production is realized, the batch production of a single floor and the batch production of the whole standard floor are effectively improved, the processing and installation efficiency is effectively improved, the electromechanical installation engineering tends to be refined, standardized and batched, the integral benefit of the electromechanical installation engineering of construction is effectively improved, and the prefabricated assembly type installation is successfully carried out aiming at the landmark building, the method has the advantages that the concept of building assembly type installation is effectively boosted, the popularity and the core competitiveness of enterprises are improved, the once forming construction technology of the electromechanical pipeline of the standard layer of the super high-rise building is adopted, the construction node can be effectively controlled, the installation quality is improved, the potential safety hazard is reduced, the environmental pollution is reduced, the material waste is reduced, and the economic benefit and the social benefit are better.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention.
Fig. 1 is a schematic flow chart of a one-step forming installation method of an electromechanical pipeline of a super high-rise standard layer.
Fig. 2 is a top view of a fixed linkage lifting platform in a one-step forming installation method of an electromechanical pipeline of a super high-rise standard layer.
Fig. 3 is a mounting schematic diagram of a support and hanger of the one-step forming mounting method of the electromechanical pipeline of the super high-rise standard layer.
Fig. 4 is a front view of a fixed linkage lifting platform in a one-step forming installation method of an electromechanical pipeline of a super high-rise standard layer.
Reference numbers in the figures: 1. a fixed linkage lifting platform; 2. a unit module support platform; 3. a support and hanger fixing platform; 4. fixing a baffle plate; 5. a movable baffle; 6. a screw drive mechanism; 7. a chute; 8. a support and hanger frame; 9. the supporting and hanging frame supports the cross beam; 10. rotating the platform; 11. a hydraulic cylinder; 12. a drive motor; 13. a magnetic sleeve; 14. adjusting the screw rod; 15. a linear motor.
Detailed Description
The present invention will be further described with reference to the following detailed description, wherein the drawings are for illustrative purposes only and are not intended to be limiting, wherein certain elements may be omitted, enlarged or reduced in size, and are not intended to represent the actual dimensions of the product, so as to better illustrate the detailed description of the invention.
Examples
Before the electromechanical mounting is performed, the following should be noted:
according to the field installation condition, the transportation condition, the material size parameter and the prefabrication processing production condition, and in combination with the corresponding construction design specification: the prefabricated member is decomposed by the design specifications of water supply and drainage of buildings, the design specifications of heating, ventilation and air conditioning of civil buildings, the electrical design specifications of civil buildings and the earthquake-resistant design specifications of electromechanical engineering of buildings.
According to the situation of the joint examination of the drawings, the requirements of owners and the field installation conditions, the BIM technology is adopted to coordinate all the professions, the collision inspection, the space clear height analysis and the comprehensive design of the electromechanical pipelines are carried out, the size parameters of the electromechanical pipelines, the electromechanical valves and the support and hanger are combined to carry out the parameterization setting of the model and carry out 1: 1, and ensuring that the BIM model reaches LOD500 with high precision and the error is controlled within 2 mm.
The design and construction specifications, the transportation conditions, the production conditions and the material related parameters are comprehensively considered to derive the prefabricated drawing, and the on-site actual measurement and correction are carried out according to the corresponding prefabricated drawing, so that the corresponding prefabricated component drawing can meet the transportation conditions, the installation condition and the safety of the on-site, and the installation efficiency can be effectively improved.
And performing factory prefabrication according to the proofreading and error-free prefabrication drawing, operating according to the process quality requirements of mechanical manufacturing in the machining process, sequentially ensuring the machining quality, transporting according to the transportation requirements of prefabricated products of materials after finishing the machining of the prefabricated pipeline and finishing the assembly of the modules, well marking and protecting the components, and then transporting to a corresponding standard layer on site for assembly construction.
Before field installation, corresponding paying-off is required to be carried out according to a BIM comprehensive model drawing, a datum line is found, all groups need to be carried out according to the datum line in the installation, and the installation accuracy is ensured.
Before the electromechanical module of the whole passageway promotes the installation scheme, the lifting platform needs to be operated and exercised in advance, and the synchronous uniformity, the stability and the safety of a plurality of devices in the process are ensured.
As shown in fig. 1-4, a method for one-step forming and installing an electromechanical pipeline of a super high-rise standard layer comprises the following steps: step a, reviewing drawings
Firstly, the original design drawing is reviewed, the design intention, the design key points, the clarification of doubt points, the elimination of design defects and the unification idea are further known, the overall BIM deepening concept is elaborately solved by combining the review condition of the original design drawing, the superiority and inferiority of the BIM deepening scheme and the rationality of the decomposition processing of a single specialty are discussed, 100% of the BIM deepening design meets the standard requirement, the requirement of an owner on clearance height and the requirement of later-stage operation and maintenance are met, the field construction condition is met, and the electromechanical installation efficiency is effectively improved;
step b, building BIM model
Building a single professional model, building a building model, a water heating electricity professional model and a support and hanger model according to the model building of each professional, the water heating electricity professional model and the support and hanger model according to the drawing review condition, the owner requirement, the field actual condition and the material parameter, integrating all the electromechanical pipeline and valve parameters of the standard layer, including the length, the nominal diameter, the outer diameter, the thickness and the connection mode, inputting the deepened design software revit for parameterization through directly or re-building the family type form, summarizing the single professional model, and carrying out BIM comprehensive wiring deepening design by combining the corresponding design construction specification, the pertinence requirement of the owner, the field actual condition and the material parameter condition;
step c, decomposing the prefabricated part
According to the professional design, construction and acceptance specifications, field transportation conditions, actual installation conditions and material parameter conditions, performing single-professional decomposition and ensuring the installation feasibility and rationality of the decomposed components;
step d, processing the component
Processing and assembling centralized components of a processing plant according to a component decomposition drawing, and prefabricating and assembling the processing plant according to a support hanger drawing prototype and a construction and installation plan condition;
step e, field installation
Mounting the prefabricated and assembled support and hanger on an on-site standard layer, prefabricating and mounting the support and pipeline according to a drawing and a BIM comprehensive wiring scheme to finish the pre-mounting of the aisle unit module, and finally finishing the on-site mounting by a method of integrally lifting the aisle unit module;
step f, testing, debugging and running
Various pipelines in the pipeline are electrified, ventilated and water-through debugged, and normal use after installation is ensured.
The method has the advantages that the accuracy of the scheme is improved by the aid of drawing review and building of the BIM model, prefabrication construction is carried out on the premise that the standard layer BIM scheme is determined, a supervision party, a construction party and a design party need to be organized to discuss when comprehensive wiring of the standard layer scheme is carried out in the early stage, and the comprehensive wiring scheme of the BIM model is determined by fully combining professional construction specifications and field conditions of water heating and electricity, later-stage operation and first-party requirements so as to ensure absolute feasibility of the scheme.
The centralized processing improves the processing standardization, the traditional on-site measurement and blanking installation is transferred to the centralized processing production of a processing plant, the centralized and standardized management of the production is convenient, the whole process is strictly carried out according to the quality control standard, and the processing and production are carried out according to the prefabricated processing drawing, the mechanized blanking processing is far more stable and reliable than the technology of field constructors, the processing quality of the electromechanical pipeline is ensured, the electromechanical field assembly type construction is realized, the potential safety hazard on the field and the environmental pollution are reduced, the assembly type construction and installation field is simply spliced and connected, the field cutting, polishing, welding and painting construction procedures are avoided, therefore, potential safety hazards, noise pollution, light pollution and gas pollution on site are effectively controlled, the site operation environment is greatly improved, and the method plays a vital role in improving the efficiency and quality of the electromechanical installation engineering construction operation.
In this embodiment, the step e includes:
installing branch pipeline components: before the branch pipeline is prefabricated and installed, the branch pipeline is prefabricated and assembled on the ground at a corresponding position, and a movable scaffold platform is set up according to the paying-off condition of the branch pipeline on site to assemble the branch pipeline on site;
secondly, mounting a hanging bracket: aiming at the tail end point of the DN25 pipeline, a gun is adopted to perform ground fixed point prefabrication, punching and mounting of a supporting and hanging bracket, so that the tail end point mounting procedure is effectively saved;
installing a corridor unit module: the corridor adopts an integral lifting installation method of the whole corridor unit module, accurate paying-off positioning is needed between installation, an assembly platform is erected at a corresponding position on the ground to assemble the unit module of the whole corridor, the corridor unit module comprises all electromechanical pipelines, connecting pieces, valve pieces and supporting and hanging frames of a single-face corridor, the assembly platform mainly comprises three fixed linkage lifting platforms with the load of 2000kg, the size of a table top of 2000 x 1500mm and the lifting height of 3500mm, fixed battens and infrared instruments, the lifting platforms are used for synchronous linkage type integral lifting installation after the corridor unit module is assembled, and the supporting and hanging frames are used for efficient supporting and hanging frame fixing by using the supporting and hanging frame fixing platform 3 after the corridor unit module is lifted to a specified height.
In the combined installation stage, when the prefabricated pipe section is in butt joint with the air conditioner water vertical pipe, the butt joint of the flanges is not easy to keep consistent, so that the lap joint flange is arranged on the prefabricated pipe section, and the butt joint precision is ensured.
As shown in fig. 2-3, in this embodiment, the third step of step e includes:
i, assembling electromechanical pipelines, connecting pieces and valve pieces, placing all pipelines at the top of channel steel according to a BIM comprehensive wiring scheme, and moving the channel steel to the top of a unit module supporting platform 2;
II, connecting all pipelines according to a BIM comprehensive wiring scheme through flanges, connecting pieces and valve pieces, and fixing the aisle unit module between the movable baffle 5 and the fixed baffle 4 through a screw rod transmission mechanism 6;
III, adjusting the support and hanger fixing platform 3 to a horizontal position through an adjusting screw 14, pre-fixing a support and hanger supporting beam 9 on the top of a magnetic sleeve 13 through a bolt, and driving the support and hanger supporting beam 9 to be right below a support and hanger 8 through a linear motor 15;
IV, carrying out synchronous linkage type integral lifting on the fixed linkage lifting platform 1 by adopting a synchronous motor and a synchronous oil cylinder, and lifting the aisle unit module to a specified height;
and V, fixing the support cross beam 9 of the support hanger to the bottom of the support hanger 8 by using a driving motor 12 and a hydraulic cylinder 11 to finish lifting installation.
In this embodiment, the unit module supporting platform 2 is fixedly connected to the top of the fixed type linkage lifting platform 1, and the supporting and hanging bracket fixing platform 3 is rotatably connected to the left and right sides of the fixed type linkage lifting platform 1 through the adjusting screw 14.
In this embodiment, the top of the unit module supporting platform 2 is provided with a sliding groove 7, the fixed baffle 4 is fixedly connected to the top of the unit module supporting platform 2, the movable baffle 5 is slidably connected to the top of the unit module supporting platform 2 through the sliding groove 7, and the output end of the screw rod transmission mechanism 6 is fixedly connected to the movable baffle 5.
Wherein, screw drive mechanism 6 can set up through the synchronous motor drive, through placing the branch pipeline inside the channel-section steel, utilize screw drive mechanism 6 to press from both sides passageway unit module tightly, later connect the branch pipeline, under the lead screw drive effect, the passageway unit module after connecting removes more uniformly, makes things convenient for the connection installation between the pipeline, compares artifical removal more convenient, uses manpower sparingly simultaneously more.
In this embodiment, the support and hanger fixing platform 3 is composed of a rotating platform 10, a hydraulic cylinder 11, a driving motor 12, and a linear motor 15, the hydraulic cylinder 11 is slidably connected to the top of the rotating platform 10, the driving motor 12 is fixedly connected to the top of the hydraulic cylinder 11, the linear motor 15 is fixedly connected to the top of the rotating platform 10, and an output end of the linear motor 15 is fixedly connected to the hydraulic cylinder 11.
In the invention, the support hanger 8 is arranged in an inverted T shape, the bottom of the support hanger 8 and the support hanger supporting beam 9 are provided with matched threaded holes, the support hanger 8 is firstly installed at the bottom of the ceiling of the standard layer, and the support hanger 8 and the support hanger supporting beam 9 are fixedly connected through the threaded holes by bolts so as to realize the support of the aisle unit module after the lifting is completed. In the invention, when the supporting and hanging bracket fixing platform 3 is not used, the supporting and hanging bracket fixing platform 3 can be fixed on the left side and the right side of the fixed linkage lifting platform 1 in the vertical direction by adjusting the rotating screw rods 14, so that a larger space is provided, the passageway unit modules can be conveniently installed at the beginning, and the supporting and hanging bracket fixing platform 3 can be adjusted to be in a horizontal state before the fixed linkage lifting platform 1 rises.
The top of the unit module supporting platform 2 is provided with a screw rod transmission mechanism 6 to drive the movable baffle plate to move, the aisle unit modules are driven to move, under the driving action of the screw rods, the connected aisle unit modules move more uniformly, the connection and installation among pipelines are convenient, the aisle unit modules are more convenient compared with manual movement and more labor-saving at the same time, the left side and the right side of the fixed linkage lifting platform 1 are provided with the support and hanger fixing platforms 3, when the fixed linkage lifting platform 1 lifts the aisle unit modules, firstly, bolts are connected onto threaded holes on the support and hanger supporting cross beams 9 in a threaded manner, the support and hanger fixing platforms 3 are adjusted to be in a horizontal state, the linear motors 15 are used for adjusting the magnetic sleeves 13 to be right below the support and hanger mounting holes, the bolts at the bottoms of the support and hanger supporting cross beams 9 are placed in the magnetic sleeves 13, when the fixed linkage lifting platform 1 lifts the aisle unit modules, can promote a gallows supporting beam 9 to passageway unit module bottom in step, thereby make things convenient for follow-up an gallows 8 and an installation of gallows supporting beam 9, after a gallows supporting beam 9 all promoted appointed height with passageway unit module, it makes a bolt on the gallows supporting beam 9 contact with the screw hole of a gallows 8 bottom to rise through a pneumatic cylinder 11 drive gallows supporting beam 9, later start driving motor 12 and pneumatic cylinder 11 and fix a gallows supporting beam 9 in a gallows 8 bottom through the bolt, can install a gallows supporting beam 9 through the promotion to passageway unit module with the help of fixed linkage lift platform 1, realize mechanical automation's a gallows installation, it is safe more swift to compare traditional manual installation mode, can further improve the installation effectiveness, accelerate the progress of electromechanical installation engineering.
In this embodiment, the step c includes:
one-professional decomposition: according to the professional design, construction and acceptance specifications, field transportation conditions, actual installation conditions and material parameter conditions, performing single-professional decomposition and ensuring the installation feasibility and rationality of decomposed components, and compiling corresponding prefabricated component tables for the purposes of improving the prefabrication and processing efficiency, improving the field installation progress and reducing the material waste;
disassembling the passage component: the integrated lifting installation method is adopted in the concentrated area of the electromechanical pipelines of the passageway, the concentrated area is mainly divided into four faces of east, west, south and north according to the actual situation on site, lifting installation is carried out according to one unit module of each face, an assembly platform is erected under the corresponding position according to the paying-off situation on site by utilizing three fixed linkage lifting platforms with the load of 2000kg, the table-board size of 2000 x 1500mm and the lifting height of 3500mm, the passing module assembly of the whole face is carried out on the platform, and the linkage lifting installation is carried out by adopting a synchronous motor and a synchronous oil cylinder after the assembly is finished.
The reasonable decomposition and prefabrication of the BIM comprehensive scheme enables the machined components to have certain reproducibility, single-professional batch production, batch production of a single floor and even batch production of the whole standard floor are realized, the machining and installing efficiency is effectively improved, the electromechanical installation engineering tends to be refined, standardized and batched, and the overall benefit of the electromechanical installation engineering is effectively improved.
In this embodiment, the step d includes:
machining an electromechanical pipeline component: processing and assembling centralized components of a processing plant according to a component decomposition drawing;
secondly, prefabricating and assembling a hanging bracket: according to a gallows drawing big appearance and the construction installation plan condition, carry out the prefabricated equipment of processing factory, utilize the adjustability, the dismountability and the repeatability of a finished product gallows to improve the efficiency of construction greatly, guarantee construction quality.
Because the processing, the assembly, the welding, the flaw detection and the heat treatment of the pipeline are all completed by adopting mechanical equipment in a prefabricated factory, the processing quality of the pipeline is improved, the pipeline is only orderly installed on site according to a member drawing, the mess caused by the pipeline manufacturing is avoided, the professional cross operation surface is reduced, the technical requirements of installation workers are reduced, the installation quality is greatly improved, all the pipeline processing and the welding operation are all completed in the prefabricated factory, the site is simply assembled according to a drawing, the high-place operation, the cross operation, the fire operation, the pipeline transportation and a large number of personnel investment factors on the site are reduced, the safe production on the site is effectively ensured, the feasible scheme is determined in advance by utilizing the BIM technology, the prefabricated drawing is manufactured according to the scheme, the traditional site processing installation is transferred to a processing factory for centralized processing production, the influence of field installation environment conditions, weather conditions, cross operation conditions and professional field containment conditions is avoided, the prefabricated member is processed and produced in advance, and the prefabricated member is produced in batches according to the pipeline installation repeatability of the standard layer, so that the project installation progress can be greatly improved.
Through the deepening design to the standard layer BIM scheme earlier stage, reduced the design defect, increased the feasibility of scheme, "measure the body and draw materials" according to BIM integrated wiring scheme, carry out hierarchical optimization of material segmentation to combine corresponding material supplier's condition, reduced the waste of material, adopt the processing production of prefabricated component of processing factory, avoided taking a lot of work and labouring the phenomenon because of weather, on-the-spot installation condition and process design error reason cause, material saving reduces cost.
The processing, the assembly, the welding, the flaw detection and the heat treatment of the pipeline are all completed by adopting mechanical equipment in a prefabricated factory, so the processing quality of the pipeline is improved, the pipeline is only orderly installed according to a component drawing on site, the mess caused by the manufacturing of the pipeline is avoided, the cross operation surfaces of various specialties are reduced, the technical requirements of installation workers are reduced, the installation quality is greatly improved, all the pipeline processing and the welding operation are completely completed in the prefabricated factory, the site is only simply assembled according to a drawing, the high-place operation, the cross operation, the fire operation, the pipeline transportation and a large number of personnel investment factors on the site are reduced, and the safe production on the site is effectively ensured.
By adopting the technical scheme: as a super high-rise building, a standard floor occupies 80 percent of the area, so the installation progress and quality of the standard floor directly influence the integral image, the construction is carried out by adopting a standard floor prefabrication assembly type installation method, the influence of a plurality of uncontrollable factors on the installation progress and quality is avoided due to the change of a production mode, the normal installation progress is ensured, the installation quality is greatly improved, the processing components have certain reproducibility by reasonably decomposing and prefabricating a BIM comprehensive scheme, the single-professional batch production is realized, the batch production of a single floor and the batch production of the whole standard floor are effectively improved, the processing and installation efficiency is effectively improved, the electromechanical installation engineering tends to be refined, standardized and batched, the integral benefit of the electromechanical installation engineering of construction is effectively improved, and the prefabricated assembly type installation is successfully carried out aiming at the landmark building, the building assembly type installation concept is effectively boosted, and the popularity and the core competitiveness of enterprises are improved.
By adopting the once-forming construction technology of the electromechanical pipelines of the standard layer of the super high-rise building, the construction nodes are effectively controlled, the installation quality is improved, the potential safety hazard is reduced, the environmental pollution is reduced, the material waste is reduced, and the consistent good comment of owners and supervisors is obtained.
The super high-rise standard layer electromechanical pipeline one-step forming installation method disclosed by the invention is used for installing in a project of a financial center of Guiyang and a project of a hot spring tourist city of Guiyang city in Guiyang of Guizhou province by adopting a super high-rise building standard layer electromechanical full-professional pipeline one-step forming construction technology, BIM is adopted to guide field construction in the whole project construction process, the problem of one difficult point is solved, the quality and the appearance of an electromechanical device are improved, high recognition of an owner is obtained, the popularity and the core competitiveness of an enterprise are improved, construction nodes are effectively controlled, the installation quality is improved, potential safety hazards are reduced, the environmental pollution is reduced, the material waste is reduced, and the consistent and good evaluation of the owner and a prisoner is obtained.
While there have been shown and described what are at present considered the preferred embodiments of the invention, the fundamental principles and essential features of the invention and advantages thereof, it will be understood by those skilled in the art that the invention is not limited by the embodiments described above, which are included to illustrate the principles of the invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the invention as defined by the appended claims and their equivalents.
Claims (2)
1. A one-step forming installation method for an electromechanical pipeline of a super high-rise standard layer is characterized by comprising the following steps:
step a, reviewing drawings
Firstly, the original design drawing is reviewed, the design intention, the design key points, the clarification of doubt points, the elimination of design defects and the unification idea are further known, the overall BIM deepening concept is elaborately solved by combining the review condition of the original design drawing, the superiority and inferiority of the BIM deepening scheme and the rationality of the decomposition processing of a single specialty are discussed, 100% of the BIM deepening design meets the standard requirement, the requirement of an owner on clearance height and the requirement of later-stage operation and maintenance are met, the field construction condition is met, and the electromechanical installation efficiency is effectively improved;
step b, building BIM model
Building a single professional model, building models of each professional according to the situation of the joint examination of drawings, the requirement of an owner, the actual situation of a site and material parameters, integrating all parameters of electromechanical pipelines and valves of a standard layer, including length, nominal diameter, outer diameter, thickness and connection mode, carrying out parameterization setting by directly or re-building family type input deepening design software, summarizing the single professional model, and carrying out BIM comprehensive wiring deepening design by combining the corresponding design construction specification, the pertinence requirement of the owner, the actual situation of the site and the material parameter situation;
step c, decomposing the prefabricated part
According to the professional design, construction and acceptance specifications, field transportation conditions, actual installation conditions and material parameter conditions, performing single-professional decomposition and ensuring the installation feasibility and rationality of the decomposed components;
step d, processing the component
Processing and assembling centralized components of a processing plant according to a component decomposition drawing, and prefabricating and assembling the processing plant according to a support hanger drawing prototype and a construction and installation plan condition;
step e, field installation
Mounting the prefabricated and assembled support and hanger on an on-site standard layer, prefabricating and mounting the support and pipeline according to a drawing and a BIM comprehensive wiring scheme to finish the pre-mounting of the aisle unit module, and finally finishing the on-site mounting by a method of integrally lifting the aisle unit module;
step f, testing, debugging and running
Various pipelines in the pipeline are electrified, ventilated and water-through debugged, so that the pipeline can be normally used after being installed;
the step e comprises the following steps:
installing branch pipeline components: before the branch pipeline is prefabricated and installed, the branch pipeline is prefabricated and assembled on the ground at a corresponding position, and a movable scaffold platform is set up according to the on-site branch pipeline laying condition to carry out on-site assembly and branch pipeline installation;
secondly, mounting a hanging bracket: aiming at the tail end point of the DN25 pipeline, a gun is adopted to perform ground fixed point prefabrication, punching and mounting of a supporting and hanging bracket, so that the tail end point mounting procedure is effectively saved;
installing a corridor unit module: the corridor adopts an integral lifting installation method of the whole corridor unit module, accurate paying-off positioning is needed during installation, an assembly platform is erected at a corresponding position on the ground to assemble the unit module of the whole corridor, the corridor unit module comprises all electromechanical pipelines, connecting pieces, valve pieces and supporting and hanging frames of a single-sided corridor, the assembly platform mainly comprises three fixed linkage lifting platforms, fixed battens and infrared ray instruments, the load of the three fixed linkage lifting platforms is 2000kg, the size of a table top is 2000 x 1500mm, the lifting height is 3500mm, after the corridor unit module is assembled, the lifting platforms are used for synchronous linkage type integral lifting installation, and after the corridor unit module is lifted to a specified height, the supporting and hanging frames are fixed by the supporting and hanging frame fixing platforms (3);
step e includes the following steps:
i, assembling electromechanical pipelines, connecting pieces and valve pieces, placing all pipelines at the top of channel steel according to a BIM comprehensive wiring scheme, and moving the channel steel to the top of a unit module supporting platform (2);
II, connecting all pipelines according to a BIM comprehensive wiring scheme through flanges, connecting pieces and valve pieces, and fixing the aisle unit module between the movable baffle (5) and the fixed baffle (4) through a screw rod transmission mechanism (6);
III, adjusting the support and hanger fixing platform (3) to a horizontal position through an adjusting screw (14), pre-fixing a support and hanger supporting beam (9) on the top of the magnetic sleeve (13) through a bolt, and driving the support and hanger supporting beam (9) to be right below the support and hanger (8) through a linear motor (15);
IV, synchronous linkage type integral lifting is carried out on the fixed linkage lifting platform (1) by adopting a synchronous motor and a synchronous oil cylinder, and the aisle unit module is lifted to a specified height;
v, fixing a support cross beam (9) of the support hanger to the bottom of the support hanger (8) by using a driving motor (12) and a hydraulic cylinder (11) to finish lifting installation;
the unit module supporting platform (2) is fixedly connected to the top of the fixed linkage lifting platform (1), and the supporting and hanging bracket fixing platform (3) is rotatably connected to the left side and the right side of the fixed linkage lifting platform (1) through adjusting screws (14); the top of the unit module supporting platform (2) is provided with a sliding groove (7), the fixed baffle (4) is fixedly connected to the top of the unit module supporting platform (2), the movable baffle (5) is slidably connected to the top of the unit module supporting platform (2) through the sliding groove (7), and the output end of the screw rod transmission mechanism (6) is fixedly connected with the movable baffle (5); a gallows fixed platform (3) comprises rotary platform (10), pneumatic cylinder (11), driving motor (12), linear electric motor (15), pneumatic cylinder (11) sliding connection is at rotary platform (10) top, driving motor (12) fixed connection is at pneumatic cylinder (11) top, linear electric motor (15) fixed connection is at rotary platform (10) top, linear electric motor (15) output end fixed connection pneumatic cylinder (11).
2. The method for installing the super high-rise standard layer electromechanical pipeline in one forming mode according to claim 1, wherein the step d comprises the following steps:
machining an electromechanical pipeline component: processing and assembling centralized components of a processing plant according to a component decomposition drawing;
secondly, prefabricating and assembling a hanging bracket: according to a hanger drawing rough sample and the construction installation plan condition, the prefabricated assembly of the processing factory is carried out, the construction efficiency is greatly improved by utilizing the adjustability, the detachability and the repeatability of a finished hanger, and the construction quality is ensured.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010641777.1A CN111719870B (en) | 2020-07-06 | 2020-07-06 | One-step forming installation method for electromechanical pipeline of super high-rise standard layer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010641777.1A CN111719870B (en) | 2020-07-06 | 2020-07-06 | One-step forming installation method for electromechanical pipeline of super high-rise standard layer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111719870A CN111719870A (en) | 2020-09-29 |
| CN111719870B true CN111719870B (en) | 2021-08-31 |
Family
ID=72572146
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010641777.1A Expired - Fee Related CN111719870B (en) | 2020-07-06 | 2020-07-06 | One-step forming installation method for electromechanical pipeline of super high-rise standard layer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111719870B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113802824A (en) * | 2021-10-13 | 2021-12-17 | 广东一新长城建筑集团有限公司 | Lifting device for prefabricated building and construction method applied to lifting device |
| CN113914591A (en) * | 2021-10-27 | 2022-01-11 | 易建网科技有限公司 | Modularization intelligent movement scaffold frame |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2014010662A (en) * | 2012-06-29 | 2014-01-20 | Toshiba Elevator Co Ltd | Bim system, server device, terminal device, method, and program |
| CN106677534A (en) * | 2016-11-16 | 2017-05-17 | 上海建工集团股份有限公司 | Assembly integral building electromechanical engineering installation system and method |
| CN107542161A (en) * | 2017-08-23 | 2018-01-05 | 中建八局第建设有限公司 | BIDA engineering of integrating technical systems |
| CN109408903A (en) * | 2018-09-29 | 2019-03-01 | 鼎宸建设管理有限公司 | Assembled architecture design method based on BIM technology |
| CN109514188A (en) * | 2018-10-23 | 2019-03-26 | 筑梦高科建筑有限公司 | Electromechanical pipeline and equipment batch production prefabricating and constructing based on BIM |
| KR102056320B1 (en) * | 2019-05-30 | 2019-12-16 | (주)더퍼스트아이씨티 | Smart Plant Multidimensional Space 3D Piping Design Collaboration System |
-
2020
- 2020-07-06 CN CN202010641777.1A patent/CN111719870B/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2014010662A (en) * | 2012-06-29 | 2014-01-20 | Toshiba Elevator Co Ltd | Bim system, server device, terminal device, method, and program |
| CN106677534A (en) * | 2016-11-16 | 2017-05-17 | 上海建工集团股份有限公司 | Assembly integral building electromechanical engineering installation system and method |
| CN107542161A (en) * | 2017-08-23 | 2018-01-05 | 中建八局第建设有限公司 | BIDA engineering of integrating technical systems |
| CN109408903A (en) * | 2018-09-29 | 2019-03-01 | 鼎宸建设管理有限公司 | Assembled architecture design method based on BIM technology |
| CN109514188A (en) * | 2018-10-23 | 2019-03-26 | 筑梦高科建筑有限公司 | Electromechanical pipeline and equipment batch production prefabricating and constructing based on BIM |
| KR102056320B1 (en) * | 2019-05-30 | 2019-12-16 | (주)더퍼스트아이씨티 | Smart Plant Multidimensional Space 3D Piping Design Collaboration System |
Also Published As
| Publication number | Publication date |
|---|---|
| CN111719870A (en) | 2020-09-29 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN111719870B (en) | One-step forming installation method for electromechanical pipeline of super high-rise standard layer | |
| CN110952811A (en) | Assembly type machine room deepening design process based on BIM and construction method thereof | |
| CN109079437B (en) | Construction method of multilayer flap seal head of large-scale marine liquefied gas storage tank | |
| CN110440054B (en) | Subway station refrigerating machine room pipeline assembling construction method | |
| CN101451397A (en) | Steel structure modularization construction process | |
| CN106250638A (en) | A kind of backform comprehensive Design based on BIM and application process | |
| CN115758553B (en) | Modularized assembly type machine room implementation method based on BIM technology | |
| CN111104709A (en) | BIM-based large-scale refrigeration machine room digital assembly method and system | |
| CN112926114B (en) | Electromechanical and steel structure integrated construction method | |
| CN103291075A (en) | Method of manufacturing large-scale module of nuclear power plant | |
| CN114179994A (en) | Ship building piping installation precision control method | |
| CN102733614B (en) | A kind of construction method of room module of nuclear power plant | |
| CN101752017B (en) | Modularization construction method for nuclear power station nuclear island | |
| CN112052501A (en) | Prefabricated construction method for modular factory of laboratory electromechanical system | |
| CN116029664A (en) | Factory prefabrication processing method for large industrial factory building pipeline | |
| CN110850816A (en) | Galvanized sheet angle iron flange tuber pipe product production management system based on BIM | |
| CN207315632U (en) | A kind of prefabricated circulating pump group assembly unit | |
| CN114576843A (en) | Assembly type welding pipeline alignment device and assembly type welding pipeline construction method | |
| CN205218539U (en) | Numerical control XY workstation | |
| CN114251514A (en) | Pipeline installation method in nuclear power construction | |
| CN110804943A (en) | On-site construction method for urban assembled vase pier steel reinforcement framework | |
| CN112536913A (en) | Digital processing method of reinforcing steel bar based on BIM and LOT technology | |
| CN110670880A (en) | House integrated construction system | |
| CN205218533U (en) | Numerical control XZ workstation | |
| CN206065471U (en) | The integrated fully-automatic production system of light heat solar girder |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20210831 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |