CN115341653B - Steep gentle slope radian abrupt change multi-curved-surface steel reticulated shell building structure and construction process thereof - Google Patents

Steep gentle slope radian abrupt change multi-curved-surface steel reticulated shell building structure and construction process thereof Download PDF

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CN115341653B
CN115341653B CN202210779967.9A CN202210779967A CN115341653B CN 115341653 B CN115341653 B CN 115341653B CN 202210779967 A CN202210779967 A CN 202210779967A CN 115341653 B CN115341653 B CN 115341653B
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steel
steel pipe
vertical wall
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CN115341653A (en
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迂长伟
林南
巴继庚
王振辉
梁威
张海涛
韩超
宋辉
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Beijing Construction Engineering Group Co Ltd
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Beijing Construction Engineering Group Co Ltd
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    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
    • E04B1/18—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons
    • E04B1/19—Three-dimensional framework structures
    • E04B1/1903—Connecting nodes specially adapted therefor
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
    • E04B1/342—Structures covering a large free area, whether open-sided or not, e.g. hangars, halls
    • 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
    • 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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Abstract

The application relates to a steep gentle slope radian abrupt change multi-curved-surface steel reticulated shell building structure and a construction process thereof, and relates to the technical field of building engineering, wherein the steel reticulated shell building structure comprises a front vertical wall, a left vertical wall, a right vertical wall and a roof truss; the upper end of the front vertical wall is fixedly provided with an arc-shaped large-arm steel pipe which is inclined upwards, a first arc-shaped steel pipe is arranged between the left vertical wall and the arc-shaped large-arm steel pipe, and a second arc-shaped steel pipe is arranged between the right vertical wall and the arc-shaped large-arm steel pipe; the arc-shaped large arm steel pipe is connected with a lower arc-shaped beam and an upper arc-shaped beam, and a left wing steep slope steel net shell, a right wing steep slope steel net shell, a left wing gentle slope steel net shell and a right wing gentle slope steel net shell are arranged on two sides of the arc-shaped large arm steel pipe; the periphery of the roof truss is connected with the upper arc beam; the application also discloses a construction process for manufacturing the steel latticed shell building structure. The steel latticed shell building structure has the characteristics of large span, high pass space, few support columns and the like; the construction process in this application is high-efficient safe and the consumptive material is few.

Description

Steep gentle slope radian abrupt change multi-curved-surface steel reticulated shell building structure and construction process thereof
Technical Field
The application relates to the technical field of large public buildings, in particular to a steep gentle slope radian mutation multi-curved-surface steel reticulated shell building structure and a construction process thereof.
Background
With the continuous development of construction technology and the continuous improvement of the level of computer-aided design, nonlinear buildings are emerging like spring bamboo shoots after rain; the steel frame type building structure is widely applied to nonlinear buildings due to the high plasticity, high construction speed and good stress performance. In the field of large public buildings, the span of steel frame type building structures is larger and larger, the modeling is more and more novel, and the structure is more and more complex. The steel frame type building structure can adapt to various building requirements with different spans and different supporting conditions, and can also adapt to various building forms in shape; common types of steel frame building structures are steel grid structures, steel truss structures, steel rope structures, and the like. The existing steel frame type building structure is usually combined with a concrete frame type building structure to form a structure and curtain wall integrated design, and steel frame type building structure rods are used as a supporting system and are required to be matched with curtain wall unit division.
In a nonlinear steel latticed shell building structure with multiple curved surfaces for abrupt change of radian of steep and gentle slopes, a large number of supporting structures are usually required to be designed, and the visual field is influenced; and the span and the through height are greatly limited; in the construction process, measures such as an ultrahigh bearing bracket and the like are needed or a large number of full-hall scaffolds are erected, so that the material loss is high, the cost is high and the installation efficiency is low.
Disclosure of Invention
In a first aspect, the present application aims to provide a steep gentle slope radian abrupt change multi-curved-surface steel reticulated shell building structure, which solves the problem of a large number of support structures existing in a steep gentle slope radian abrupt change multi-curved-surface building structure between a large span and a large pass of a high-low oblique span.
The application provides a steep gentle slope radian abrupt change multi-curved-surface steel reticulated shell building structure adopts following technical scheme:
a steep gentle slope radian abrupt change multi-curved-surface steel reticulated shell building structure comprises a front vertical wall, a left vertical wall, a right vertical wall and a roof truss;
the front vertical wall is fixedly arranged on the ground, an arc-shaped large-arm steel pipe which is inclined upwards is fixedly arranged at the upper end of the front vertical wall, and a first supporting steel pipe is arranged between the lower end of the arc-shaped large-arm steel pipe and the ground;
the lower ends of the left vertical wall and the right vertical wall are fixedly arranged on one floor of the concrete frame building structure, a first arc-shaped steel pipe is arranged between the left vertical wall and the arc-shaped large arm steel pipe, a second arc-shaped steel pipe is arranged between the right vertical wall and the arc-shaped large arm steel pipe, and a second supporting steel pipe is arranged between the first arc-shaped steel pipe and the ground;
the middle part of the arc-shaped large arm steel pipe is fixedly provided with a lower arc-shaped beam extending towards the left side and the right side of the arc-shaped large arm steel pipe, the upper end of the arc-shaped large arm steel pipe is fixedly provided with an upper arc-shaped beam extending towards the left side and the right side of the arc-shaped large arm steel pipe, a left wing abrupt slope steel net shell is arranged between the lower arc-shaped beam and the upper arc-shaped beam, and a right wing abrupt slope steel net shell is arranged between the lower arc-shaped beam and the upper arc-shaped beam, which are positioned on the right side of the arc-shaped large arm steel pipe;
A left wing gentle slope steel net shell is arranged between the lower arc beam and the upper end of the left vertical wall and between the lower arc beam and the upper end of the right vertical wall are arranged on the right side of the arc large arm steel pipe;
the roof truss is fixed on a top floor of the concrete frame building structure through roof supporting steel pipes, and the peripheral edge of the roof truss is connected with the upper arc-shaped beam.
The steel net shell building structure is suitable for oversized space free-form surface steel grid structures such as large-scale theatres, stadiums, airport terminal buildings, high-speed rail station houses, conference and exhibition centers and the like, and is matched with a concrete frame building structure to form an integral building structure after being combined; in the application, the front gate direction of the integral building structure is a front direction, the corresponding position is a front position or a front side position, the opposite other direction is a rear position, the corresponding position is a rear position or a rear side position, when facing the gate, the left hand direction is a left direction, the corresponding position is a left position or a left side position, the right hand direction is a right direction, and the corresponding position is a right position or a right side position. The azimuth terms in the present application are used to facilitate description of the technical solutions in the present application, and are not limiting on the technical solutions.
The concrete frame building structure matched with the steel net shell building structure is provided with a sunk square at the front side, the ground of the vertical wall before installation is the ground of the sunk square, and a layer of terrace is arranged at two sides of the sunk square and used as a layer of floor for installing the left vertical wall and the right vertical wall; a floor in this application is broadly referred to as a lower floor, where the height is between the upper floor and the floor, rather than visually, and thus may be a two-floor or a three-floor as an equivalent alternative. By adopting the technical scheme, the steel net shell building structure is mainly coated on the left side, the right side and the front side of the concrete frame building structure, the concrete frame building structure can be a multi-layer building with more than five layers, a roof truss is arranged above the top floor of the concrete frame building structure and is used as a top covering layer of the concrete frame building structure, and the roof truss is connected with a front vertical wall through an arc-shaped inclined arc-shaped large-arm steel pipe; the lower extreme of the big arm steel pipe of arc links firmly with preceding vertical wall to set up first support steel pipe between with ground, thereby play the supporting role to the big arm steel pipe of arc, bear the vertical stress and the lateral stress of the big arm steel pipe of arc. The upper end of the arc-shaped large-arm steel pipe extends obliquely upwards and then is connected with an upper arc Liang Xianggu, and partial side stress is transmitted to the concrete frame building structure in a dispersed manner through the upper arc-shaped beam and the roof truss; the first arc-shaped steel pipe and the second arc-shaped steel pipe are directly supported on the ground through the second supporting steel pipe, the two ends of the first arc-shaped steel pipe are connected with the left vertical wall and the arc-shaped large arm steel pipe, the two ends of the second arc-shaped steel pipe are connected with the right vertical wall and the arc-shaped large arm steel pipe, and a stable and reliable integral three-dimensional structure is formed between the two ends of the second arc-shaped steel pipe, so that the weights of the left wing gentle slope steel net shell and the right wing gentle slope steel net shell can be effectively supported; the lower arc Liang Ji is connected with the left vertical wall and the right vertical wall, is connected with the arc large-arm steel pipe, and is connected with the upper arc beam through the left wing steep slope steel net shell and the right wing steep slope steel net shell, so that an integral three-dimensional structure is formed with the roof truss. The stress load of the whole structure is uniformly distributed, and each part is scientifically and reasonably designed, so that the safety of the structure can be ensured on the premise of using the supporting structure as little as possible.
The wing district is radian abrupt change free curved surface individual layer steel grid structure about the steel mesh shell building structure in this application, and maximum steel pipe specification is phi 900 x 48mm, and left wing gentle slope steel mesh shell and right wing gentle slope steel mesh shell are whole to be space torsion irregular curved surface molding, bilateral symmetry, and the boundary division is obvious, and first arc steel pipe and second arc steel pipe are major diameter thick wall return bend, and left wing abrupt slope steel mesh shell and right wing abrupt slope steel mesh shell are space individual layer slope curved surface steel grid, and the molding is light and graceful, left and right mirror symmetry, space height is big. The whole structure forms a multi-curved-surface building structure with large span, high and low inclined spans and large passages, the whole structure is attractive in appearance, the applied supporting structure is less, and the visual field is wide.
Optionally, the big arm steel pipe of arc includes the gentle slope section that is located the lower extreme and is located middle part and abrupt slope section of upper end, left side wing gentle slope steel reticulated shell and right side wing gentle slope steel reticulated shell all with gentle slope section dock, left side wing abrupt slope steel reticulated shell and right side wing abrupt slope steel reticulated shell all dock with abrupt slope section dock.
By adopting the technical scheme, the arc-shaped large-arm steel pipe is installed in a segmented mode, and the gentle slope section of the arc-shaped large-arm steel pipe is butted with the left wing gentle slope steel net shell and the right wing gentle slope steel net shell; the gentle slope section can set up temporary support steel pipe during the installation, and the abrupt slope section adopts hoist and mount and flexible cable wire firm, correction's mode to fix a position the installation, and arc big arm steel pipe is as the main bearing member of sinking square top, is used for connecting left wing abrupt slope steel reticulated shell and right wing abrupt slope steel reticulated shell promptly, is used for after installing the steel mesh again, divides assorted with the curtain unit, forms structure, curtain integrated design, and the length hinge of abrupt slope section is long, and the inclination is very big, and the vertical component that its produced is greater than vertical component, directly transmits its most component to ground, realizes big interarea, few bearing structure's effect.
Optionally, the quantity of arc big arm steel pipe has two and two arc big arm steel pipes to control the interval setting, the tip of first arc steel pipe links firmly in the arc big arm steel pipe outside that is located the left side, the tip of second arc steel pipe links firmly in the arc big arm steel pipe outside that is located the right side, is equipped with the steel mesh that forms by crisscross steel pipe between two arc big arm steel pipes.
By adopting the technical scheme, the bearing capacity of the two arc-shaped large-arm steel pipes is improved; the two arc-shaped large-arm steel pipes are arranged side by side, so that the gentle slope sections of the two arc-shaped large-arm steel pipes are conveniently connected with the left wing gentle slope steel net shell and the right wing gentle slope steel net shell respectively, and the steep slope sections of the two arc-shaped large-arm steel pipes are connected with the left wing steep slope steel net shell and the right wing steep slope steel net shell respectively; the steel mesh between the two arc-shaped large-arm steel pipes is used for installing the curtain wall, so that the condition that a large rod piece shields the sight of the whole building is avoided, and meanwhile, direct butt joint between the left wing gentle slope steel mesh shell and the right wing gentle slope steel mesh shell and between the left wing steep slope steel mesh shell and the right wing steep slope steel mesh shell is avoided to be abrupt is avoided, and therefore the attractiveness of the whole building is improved.
Optionally, a reinforced support steel pipe is further arranged between the two arc-shaped large arm steel pipes, two ends of the reinforced support steel pipe are respectively and fixedly connected to the inner sides of the two arc-shaped large arm steel pipes, and two ends of the reinforced support steel pipe are respectively corresponding to the end parts of the first arc-shaped steel pipe and the end parts of the second arc-shaped steel pipe.
Through adopting above-mentioned technical scheme, promote stability and reliability between two arc big arm steel pipes through strengthening support steel pipe, especially reduce the deformation that makes the big arm steel pipe of arc produce after first arc steel pipe and second arc steel pipe transmit stress to two arc big arm steel pipes.
Optionally, a third arc steel pipe is fixedly connected between the upper end of the left side of the front vertical wall and the middle part of the first arc steel pipe, a left wing triangular area is formed between the third arc steel pipe, the first arc steel pipe and the arc large arm steel pipe positioned on the left side, and a left wing triangular steel rack is arranged in the left wing triangular area; a fourth arc-shaped steel pipe is fixedly connected between the upper end of the right side of the front vertical wall and the middle of the second arc-shaped steel pipe, a right wing triangular area is formed between the fourth arc-shaped steel pipe, the second arc-shaped steel pipe and the arc-shaped large arm steel pipe positioned on the right side, and a right wing triangular angle steel rack is arranged in the right wing triangular area.
Through adopting above-mentioned technical scheme for it is more natural to pass through between the top of preceding perpendicular wall and the top of left side perpendicular wall and the top of right side perpendicular wall, can not leave great vacancy, has increased the area of the sunk square that steel latticed shell building structure covered in this application.
Optionally, left and right sides of the roof truss are respectively provided with a left steel reticulated shell and a right steel reticulated shell; the left steel net shell is butted with the left wing steep slope steel net shell, and the right steel net shell is butted with the right wing steep slope steel net shell.
Through adopting above-mentioned technical scheme, left side steel reticulated shell also can be regarded as the continuation of left wing abrupt slope steel reticulated shell towards the rear side direction, and right side steel reticulated shell also can be regarded as the continuation of right wing abrupt slope steel reticulated shell towards the rear side direction, and left side steel reticulated shell and right side steel reticulated shell are located the both sides of roofing truss and left side steel reticulated shell and right side steel reticulated shell symmetry setting, and left side steel reticulated shell and right side steel reticulated shell and curtain unit assorted realize more complete cladding to concrete frame building structure's both sides.
Optionally, the roof truss comprises at least one roof transverse truss and a plurality of roof longitudinal trusses, the plurality of roof longitudinal trusses are arranged in parallel at intervals, the roof longitudinal trusses are fixedly connected with the roof transverse truss, and the roof longitudinal trusses are fixedly connected with each other through a plurality of transverse steel pipes; the roof support steel pipes are single-pole upright columns or tree-shaped upright columns or V-shaped upright columns, the lower ends of the roof support steel pipes are fixed on the top floor of the concrete frame building structure, and the upper ends of the roof support steel pipes are fixedly connected to the lower sides of the longitudinal trusses of the roof and/or the lower sides of the transverse trusses of the roof.
Through adopting above-mentioned technical scheme, the installation can be put up to the roof truss adoption tradition full hall scaffold frame, and the atress of whole roof truss is through a plurality of roofing support steel pipe dispersion to concrete frame building structure.
Further, as a preferable scheme, a single-pole upright post is arranged between the roof longitudinal truss and the top floor of the concrete frame building structure and is used for supporting the roof longitudinal truss; v-shaped upright posts are arranged between the roof transverse truss and the top floor of the concrete frame building structure and are used for supporting the roof transverse truss. The longitudinal truss of the roof is divided into a front part and a rear part by the transverse truss of the roof, the rear part of the longitudinal truss of the roof is gentle, the front part of the longitudinal truss of the roof has a certain gradient, the front part of the longitudinal truss of the roof is also provided with a lighting hole, and the lighting hole is formed by encircling a three-layer steel pipe annular structure fixedly arranged on the longitudinal truss of the roof.
The span of the roof transverse truss in the application can reach 67 meters, and the lowest point elevation of the whole building structure is as follows: -5.600m, highest point elevation: +52.299m, namely, a horizontal datum plane with a floor of a concrete frame building structure being 0m, the distance between the ground of a sinking square and the floor of the concrete frame building structure is 5.6m, and the distance between the highest point of the upper arc beam and the floor of the concrete frame building structure is 52.299m; the upper end of the front vertical wall is fixedly connected with a square pipe, the square pipe is connected with all welded rigid joints at the upper ends of all secondary rods of the front vertical wall, and the lower end of the arc-shaped large-arm steel pipe is fixedly connected with the square pipe in a welding way. Two first support steel pipes and two second support steel pipes respectively, wherein the maximum section of each first support steel pipe and the maximum section of each second support steel pipe are phi 1200mm multiplied by 80mm; the roof transverse truss and the roof longitudinal truss are composed of a plurality of curved steel pipes; the left wing gentle slope steel net shell, the right wing gentle slope steel net shell, the left wing abrupt slope steel net shell, the right wing abrupt slope steel net shell, the left wing three-angle steel net frame, the right wing three-angle steel net frame and the abrupt slope section below of the arc big arm steel pipe do not need to set up the support steel pipe, have improved the penetrating sense of steel net shell building structure inside, and whole field of vision is wider.
The steel reticulated shell building structure is suitable for a large space, has high requirement on integrity, simultaneously has a structure system of high-low span and light weight, reduces structural rod pieces to shield vision, and has a good overall space effect. The structural member not only serves as a supporting system, but also is matched with curtain wall unit division, and the structural member and curtain wall integrated design formed by combining the space steel net shell and the roof steel truss structure system is adopted, so that the structure is novel, and the appearance is atmospheric.
In a second aspect, the present application aims to provide a construction process for constructing the steep gentle slope radian abrupt change multi-curved-surface steel reticulated shell building structure, which solves the problems of large-span, high-space, high-low oblique span and large nonlinear steel reticulated shell building structure that construction difficulty is high, construction efficiency is low, and a large number of temporary support steel pipes and a large number of scaffolds are required.
The construction process for constructing the steep gentle slope radian mutation multi-curved-surface steel reticulated shell building structure adopts the following technical scheme:
a construction process for constructing the steep gentle slope radian abrupt change multi-curved-surface steel reticulated shell building structure comprises the following steps:
s1, dividing a front vertical wall, a left vertical wall, a right vertical wall, a left wing gentle slope steel net shell, a right wing gentle slope steel net shell, a left wing steep slope steel net shell and a right wing steep slope steel net shell in a steel net shell building structure into a plurality of assembly unit modules according to a building design drawing, prefabricating each section of steel pipe in a factory, and conveying to a construction site;
S2, sequentially assembling each assembling unit module of the front vertical wall, the left vertical wall and the right vertical wall on an assembling jig frame on the ground, and hoisting and installing the assembling unit modules to a preset position;
s3, building a roof truss on a top floor of the concrete frame building structure;
s4, constructing a temporary steel pipe support at a preset position of the concrete frame building structure, and lifting and mounting a first arc-shaped steel pipe, a second arc-shaped steel pipe, a third arc-shaped steel pipe, a fourth arc-shaped steel pipe and a gentle slope section at the lower end of the arc-shaped large arm steel pipe in a segmented mode by utilizing the temporary steel pipe support, and a lower arc-shaped beam;
s5, sequentially assembling each assembly unit module of the left wing gentle slope steel net shell and the right wing gentle slope steel net shell on an assembly jig on the ground, and hoisting and installing each assembly unit module of the left wing gentle slope steel net shell and each assembly unit module of the right wing gentle slope steel net shell to a preset position by adopting a segmentation and segmentation stage-by-stage unsupported symmetrical installation sequence;
s6, hoisting and installing the steep slope sections at the middle and upper ends of the arc-shaped large-arm steel pipes in sequence, and stabilizing and correcting by adopting flexible steel cables;
s7, sequentially assembling the left-wing steep slope steel net shell and each assembled unit module of the right-wing steep slope steel net shell on an assembling jig on the ground, and hoisting and installing each assembled unit module of the left-wing steep slope steel net shell and each assembled unit module of the right-wing steep slope steel net shell to a preset position by adopting a sectional and piecewise and stage-free symmetrical installation sequence;
S8, lifting and symmetrically installing upper arc beams in a segmented mode, welding and fixedly connecting the peripheral edge of a roof truss with the upper arc beams, and embedding missing steel pipes;
s9, unloading the temporary support steel pipes step by step from low to high and symmetrically left to right.
The steel latticed shell building structure built in the application is matched with a concrete frame building structure, and an integral building structure is formed after the steel latticed shell building structure is combined; during construction, a concrete frame building structure is firstly built, the concrete frame building structure is a multi-layer building with more than five layers, a sinking type space is arranged in the middle of the front side of the concrete frame building structure, concrete ground is arranged in the sinking type space, low-layer terraces are arranged on two sides of the sinking type space, one or two layers of layer height designs can be arranged on the low-layer terraces relative to the concrete ground in the sinking type space, high-layer terraces are arranged on two sides, close to the middle part and the rear part, of the concrete frame building structure, the height of each high-layer terrace is smaller than the top layer height of the concrete frame building structure, and the height of each high-layer terrace is higher than that of each low-layer terrace, and can be generally designed to be three layers or four layers of layer heights; the front vertical wall is arranged on the concrete floor of the sinking space, the left vertical wall and the right vertical wall are respectively arranged on low-layer terraces at two sides of the sinking space, the left side steel net shell and the right side steel net shell are respectively arranged at the left side and the right side of the concrete frame building structure, the left side steel net shell and the right side steel net shell are built between the step S2 and the step S3, and finally the left side steel net shell is butted with the left wing steep slope steel net shell, and the right side steel net shell is butted with the right wing steep slope steel net shell; the left steel net shell and the right steel net shell are respectively arranged on high-rise terraces at two sides of the concrete frame building structure, the heights of the left steel net shell and the right steel net shell are always extended upwards to exceed the height of the top floor of the concrete frame building structure, and the left side and the right side of the roof truss are respectively connected with the upper ends of the left steel net shell and the right steel net shell in a butt joint mode.
The steep gentle slope radian abrupt change multi-curved-surface steel net shell building structure built in the method is a large-span single-layer free-curved-surface steel grid structure, is generally carried out according to a construction process of supporting first and then flexibly stabilizing, site construction follows the general welding principle of 'bottom-up, unified symmetry, partition and block division and from inside to outside', temporary supporting steel pipes are unloaded according to the sequence of 'step-by-step, symmetry, slowness and balance' after steel grid closure, and the problem that the large-span single-layer free-curved-surface steel grid structure is difficult to construct is solved. Meanwhile, a plurality of groups of assembling jig frames can be arranged, the assembling jig frames are assembled through ground sections in a slicing mode, the workload of overhead operation is reduced, a plurality of assembling unit modules can be assembled simultaneously, the construction operation surface is enlarged, the assembling period is shortened, the overall construction progress is accelerated, and the construction efficiency is improved.
In the method, the steel net shell pre-arching value is accurately determined through construction process simulation analysis before construction, the arching value is reserved in the modeling process, a safe and efficient heavy steel pipe supporting system is designed, hoisting machinery is reasonably selected, ground assembly is adopted, split hoisting is in place, flexible guy ropes are stable, symmetrical unloading is performed in groups, positioning accuracy is strictly controlled in the ground assembly and high-altitude installation process, deformation values are monitored in the unloading process, deformation of each structure is ensured to meet design and specification requirements, and experience reference and guidance are provided for similar complex space steel structure construction.
Optionally, in the step S2, a front vertical wall is installed on the ground, and a symmetrical left vertical wall and a symmetrical right vertical wall are installed on a floor of the concrete frame building structure, where the left vertical wall and the right vertical wall are respectively located at left and right sides of the front vertical wall, and the left vertical wall and the right vertical wall are both disposed at intervals from the front vertical wall and are both located at a rear position of the front vertical wall.
Through above-mentioned technical scheme, left side erects the wall and also adopts the mode of hoisting again after the unit is assembled to install, and left side erects the wall and can divide into 5 unit modules, assembles in proper order from the rear side to the front side, and two adjacent unit modules pass through steel pipe welding. The front vertical wall, the left vertical wall and the right vertical wall are respectively installed in different directions of the concrete frame building structure, 1 300 ton crawler crane is selected to be used as a main hoisting machine at the front side of the concrete frame building structure, 220 ton automobile cranes are respectively selected to be used as hoisting machines at the left side and the right side of the concrete frame building structure, the front vertical wall, the left vertical wall and the right vertical wall can be subjected to construction operation at the same time, and each assembly unit module of the front vertical wall, the left vertical wall and the right vertical wall is sequentially assembled on an assembly jig frame and then is hoisted and installed, so that the construction efficiency is high and the construction is safer.
The roof truss comprises a roof transverse truss positioned in the middle and a plurality of roof longitudinal trusses, wherein the roof longitudinal trusses are fixedly connected through steel pipes, the roof transverse truss positioned in the middle divides the roof longitudinal trusses into a front part and a rear part, the front part is defined as a front area longitudinal truss, the rear part is defined as a rear area longitudinal truss, and the rear area longitudinal trusses are constructed and installed by adopting a full scaffold; the transverse truss of the roof and the longitudinal truss of the front area are also divided into a plurality of spliced unit modules, after the step S8, before the step S9, each spliced unit module of the transverse truss of the roof and the longitudinal truss of the front area is spliced on a splicing jig on the ground in sequence, and then the spliced unit modules are lifted, installed and fixed. And a lighting hole structure formed by three layers of steel pipe annular structures is also lifted and installed on the front-area longitudinal truss.
Optionally, in the step S2, the step S5 and the step S7, before each assembly unit module is assembled on the assembly jig on the ground, the overall modeling is performed, and the space three-dimensional coordinates of each assembly unit module are calculated and extracted and positioned and lofted; according to the positioning lofting coordinates, a temporary support is arranged on the spliced jig frame, and the position and elevation of the temporary support are positioned by using the total station.
In the application, the three-dimensional coordinates of the ports are used for positioning the main pipe of each assembled unit module, the accuracy of the butt joint interface of the main pipe is adjusted, the welding line constraint code plates are arranged, and the assembly sequence of the secondary pipes is used for hoisting after the completion of pipe-pipe intersecting hidden welding line welding and the qualification detection. By adopting the technical scheme, the accurate reliability of assembling of each assembling unit module can be ensured.
Optionally, determining the arrangement position and the height of the support plane of each temporary support steel pipe according to the form of the steel net shell building structure and the characteristic requirements of the concrete frame building structure, determining the support reaction force through the simulation analysis of the construction process, and selecting a flange node independent steel pipe support or a combined steel pipe support; the top of the temporary support steel pipe is provided with a positioning template and a limiting plate, the bottom of the temporary support steel pipe is welded and fixed with the ground foundation slab or the concrete beam slab through the embedded plate, and whether the lower floor is subjected to roof returning reinforcement is determined according to the checking result of the concrete structure.
Through adopting above-mentioned technical scheme, guaranteed the fail safe nature of construction, effectively reduced the structure deformation risk that temporary support steel pipe sinks to lead to simultaneously, also avoided temporary support steel pipe to the greatest extent simultaneously to building structure's destruction effect.
Further, the temporary support steel pipe consists of a plurality of sections, two adjacent sections of the temporary support steel pipe are connected through flange joints, the temporary support steel pipe is connected with the ground by using 4.8-level common bolts for splicing, and the flange clamp plate joints are connected with the horizontal support or the inclined support; the lower end of the temporary support steel pipe is welded and fixed between a 7-shaped plate and an embedded part, and a positioning template is arranged at the top; and the wind is pulled on four sides to adjust and correct in the installation process of the temporary support steel pipe, so that the hoisting safety is ensured.
Optionally, in the step S4, according to the sectional positions, lengths and weights of the first arc-shaped steel pipe and the second arc-shaped steel pipe, the temporary support steel pipe is installed in a high-altitude section, two points are lifted in the lifting process of the crane, the angle of the single point is adjusted by using the auxiliary angle of the chain block, the auxiliary correction of wind is pulled, the three-dimensional coordinate positioning of the high-precision total station is performed, and the crane can be unhooked after the whole butt joint welding is completed.
By adopting the technical scheme, the construction safety and reliability are ensured, and the installation accuracy and reliability are ensured.
In the application, the hoisting machinery is selected according to the weight and the external dimension of the assembled unit module and the working conditions such as site, space and the like, and the curved surface assembled unit module with larger span and height is preferably hoisted by a crawler crane or an automobile crane. According to the characteristics of the steel reticulated shell building structure, the construction quality is guaranteed, the safety risk is reduced, and under the premise of improving the construction efficiency, each part is divided into larger assembly unit modules as much as possible according to the mechanical property of the on-site hoisting equipment.
Optionally, in the step S9, a positioning template at the top end of the temporary support steel pipe is cut, and the temporary support steel pipe is separated from the steel latticed shell building structure by adopting a maximum deformation and equal unloading process.
The lateral bending of the temporary support steel pipe is l/1000, and is not more than 50mm, and the overall verticality is H/1000, and is not more than 50mm; the grade of butt welding seams of the steel pipes is full penetration first grade, the grade of intersecting welding seams of the steel pipes is second grade, and the height hf of the welding seams is more than or equal to 0.7 plate thickness at the fillet welding seam part; the deflection value measured after the total splicing of the steel net shell building structure is completed is not more than 1.15 times of the deflection calculated value under the corresponding load condition; the pulling angle of the steel cable and the wind is not smaller than 30 degrees, and the anchoring point is ensured to be firm and reliable.
In summary, the present application includes at least one of the following beneficial technical effects:
1. the steel latticed shell building structure in this application wholly forms the multi-curved surface building structure between large-span, high low oblique span large-pass, and whole handsome in appearance, and its bearing structure of application is less, and the field of vision is broad.
2. The steel reticulated shell building structure in the application is novel in appearance, light and graceful in structural modeling, combined in hardness and softness, and reasonable in layout of each part and good in structural stability, and the radian of the steep gentle slope curved surface is suddenly changed.
3. In the application, the parts are piecewise assembled on the ground, so that a large amount of overhead work workload is reduced, the safety risk is reduced, the construction quality is ensured, and the construction efficiency is improved.
4. The jig frame can be assembled in a plurality of groups, and the plurality of assembling unit modules are assembled simultaneously, so that the construction operation surface is enlarged, the assembling period is further shortened, and the overall construction progress is accelerated.
5. The first arc steel pipe and the independent steel pipe of second arc steel pipe setting ring flange node support among this application, have no support installation in left wing gentle slope steel net shell, the right wing gentle slope steel net shell, only the boundary is responsible for the part and is set up the steel pipe and support, great reduction the frock quantity, and the independent steel pipe of ring flange node supports installs and removes conveniently, no material loss, green high efficiency accords with the requirement of saving materials, has improved the efficiency of construction simultaneously.
6. The steep slope section, the left wing steep slope steel net shell and the right wing steep slope steel net shell at the middle part and the upper end of the arc-shaped large arm steel pipe are installed in a supporting-free mode, the reverse deformation arching value is reserved, the flexible steel rope is adopted for stability and correction, the installation difficulty is reduced, the installation speed is accelerated, the tooling cost is saved, and the engineering quality is guaranteed.
7. The steep slope sections at the middle part and the upper end of the arc-shaped large-arm steel pipe and the sections on two sides are installed in a sectional and high-altitude symmetrical mode, a stable structural system is formed section by section, the problem of weak rigidity outside a single-layer grid plane is solved, the high-altitude positioning difficulty is reduced, the installation accuracy is ensured, the safety risk is reduced, and the construction period is shortened.
Drawings
Fig. 1 is a schematic perspective view of a steel latticed shell building structure of the present application.
Fig. 2 is a schematic diagram of a steel latticed shell building structure in a second perspective structure.
Fig. 3 is a schematic top view of the steel latticed shell building structure of the present application.
Fig. 4 is a schematic structural view of a three-layer steel tube ring structure forming a light hole in the present application.
Fig. 5 is a schematic view of the installation and matching structure of the steel latticed shell building structure and the concrete frame building structure in the application.
Fig. 6 is a schematic diagram of the assembled structure of a portion of the primary tube bar in the steel mesh shell construction structure of the present application.
Fig. 7 is a schematic view of an installation connection structure of a first support steel pipe and a first arc-shaped steel pipe in the present application.
Fig. 8 is a schematic view of a partial structure of a roof support steel pipe using a single pole upright in the present application.
Fig. 9 is a schematic view of a partial structure of a V-shaped pillar used as a roof support steel pipe in the present application.
Fig. 10 is a schematic view of a state structure during the construction process in the present application.
Fig. 11 is a schematic diagram of a second state structure during the construction process in the present application.
Fig. 12 is a schematic diagram of a state structure during the construction process in the present application.
Fig. 13 is a distribution diagram of the split-assembled unit modules of the left vertical wall, the left wing steep slope steel net shell, the left wing gentle slope steel net shell and the left side steel net shell in the present application.
Fig. 14 is a diagram of the distribution of the front vertical wall, the arc-shaped large arm steel pipe and the split-assembled unit modules of the steel grid in the present application.
Fig. 15 is a schematic view of the assembled unit modules assembled on the assembled jig frame in the present application.
Fig. 16 is a schematic perspective view of a temporary support steel pipe in the present application.
In the figure, 1, a front vertical wall; 1a, square tubes; 2a, a left vertical wall; 2b, right vertical wall; 3. roof truss; 31. roof transverse truss; 32. roof longitudinal truss; 33. transverse steel pipes; 34. a three-layer steel pipe annular structure; 34a, lighting hole; 4. arc-shaped large arm steel pipes; 41. a gentle slope section; 42. a steep slope section; 5. a first support steel pipe; 6. a second support steel pipe; 7. a first arc-shaped steel pipe; 8. a second arc-shaped steel pipe; 9. a lower arc beam; 10. an arc beam is arranged on the upper part; 11. left wing steep slope steel net shell; 12. right wing steep slope steel net shell; 13. left wing gentle slope steel net shell; 14. right wing gentle slope steel net shell; 15. a steel grid; 16. reinforcing and supporting the steel pipe; 17. a third arc-shaped steel pipe; 18. a fourth arc-shaped steel pipe; 19. left wing three angle steel net rack; 20. right wing three angle steel net rack; 21. a left steel latticed shell; 22. right steel latticed shell; 23. roof support steel pipes; 24. temporarily supporting the steel pipe; 25. assembling the jig frame; 26. a total station; 27. a concrete frame building structure.
Detailed Description
The present application is described in further detail below with reference to fig. 1-16.
The embodiment discloses a steep gentle slope radian abrupt change multi-curved-surface steel reticulated shell building structure, and the steep gentle slope radian abrupt change multi-curved-surface steel reticulated shell building structure is matched with a concrete frame building structure for installation and use.
Referring to fig. 1 and 2, the steep gentle slope radian abrupt change multi-curved steel mesh shell building structure in the present embodiment includes a front vertical wall 1, a left vertical wall 2a, a right vertical wall 2b, a roof truss 3, a left wing steep slope steel mesh shell 11, a right wing steep slope steel mesh shell 12, a left wing gentle slope steel mesh shell 13, a right wing gentle slope steel mesh shell 14, a left wing triangular steel mesh frame 19, a right wing triangular steel mesh frame 20, a left side steel mesh shell 21, and a right side steel mesh shell 22; the upper end of the front vertical wall 1 is fixedly provided with an arc-shaped large arm steel pipe 4 which is inclined upwards, a first arc-shaped steel pipe 7 is arranged between the left vertical wall 2a and the arc-shaped large arm steel pipe 4, a second arc-shaped steel pipe 8 is arranged between the right vertical wall 2b and the arc-shaped large arm steel pipe 4, the middle part of the arc-shaped large arm steel pipe 4 is fixedly provided with a lower arc-shaped beam 9 which extends towards the left side and the right side of the arc-shaped large arm steel pipe 4, the upper end of the arc-shaped large arm steel pipe 4 is fixedly provided with an upper arc-shaped beam 10 which extends towards the left side and the right side of the arc-shaped large arm steel pipe 4, a left wing abrupt slope steel net shell 11 is positioned between the lower arc-shaped beam 9 and the upper arc-shaped beam 10 on the left side of the arc-shaped large arm steel pipe 4, and a right wing abrupt slope steel net shell 12 is positioned between the lower arc-shaped beam 9 and the upper arc-shaped beam 10 on the right side of the arc-shaped large arm steel pipe 4; the left wing gentle slope steel reticulated shell 13 is positioned between the lower arc-shaped beam 9 at the left side of the arc-shaped large arm steel pipe 4 and the upper end of the left vertical wall 2a and the first arc-shaped steel pipe 7, and the right wing gentle slope steel reticulated shell 14 is positioned between the lower arc-shaped beam 9 at the right side of the arc-shaped large arm steel pipe 4 and the upper end of the right vertical wall 2b and the second arc-shaped steel pipe 8; a third arc-shaped steel pipe 17 is fixedly connected between the upper end of the left side of the front vertical wall 1 and the middle part of the first arc-shaped steel pipe 7, a left wing triangular area is formed between the third arc-shaped steel pipe 17, the first arc-shaped steel pipe 7 and the arc-shaped large arm steel pipe 4 positioned on the left side, and a left wing triangular steel net frame 19 is positioned in the left wing triangular area; a fourth arc-shaped steel pipe 18 is fixedly connected between the upper end of the right side of the front vertical wall 1 and the middle part of the second arc-shaped steel pipe 8, a right wing triangular area is formed between the fourth arc-shaped steel pipe 18 and the second arc-shaped steel pipe 8 as well as between the right arc-shaped large arm steel pipe 4, a right wing triangular steel net frame 20 is positioned in the right wing triangular area, a left steel net shell 21 and a right steel net shell 22 are respectively positioned on the left side and the right side of the roof truss 3, and the left steel net shell 21 and the right steel net shell 22 are symmetrically arranged; the left steel net shell 21 is butted with the left wing steep slope steel net shell 11, and the right steel net shell 22 is butted with the right wing steep slope steel net shell 12.
Referring to fig. 3, two arc-shaped large arm steel pipes 4 are arranged at left and right intervals, the end part of a first arc-shaped steel pipe 7 is fixedly connected to the outer side of the arc-shaped large arm steel pipe 4 positioned at the left side, the end part of a second arc-shaped steel pipe 8 is fixedly connected to the outer side of the arc-shaped large arm steel pipe 4 positioned at the right side, and a steel grid 15 formed by criss-cross steel pipes is arranged between the two arc-shaped large arm steel pipes 4; a reinforced support steel pipe 16 is further arranged between the two arc-shaped large-arm steel pipes 4, two ends of the reinforced support steel pipe 16 are respectively and fixedly connected to the inner sides of the two arc-shaped large-arm steel pipes 4, and two ends of the reinforced support steel pipe 16 respectively correspond to the end parts of the first arc-shaped steel pipes 7 and the end parts of the second arc-shaped steel pipes 8.
Referring to fig. 3, the roof truss 3 is fixed to the top floor of the concrete frame building structure 27 by roof support steel pipes 23 and the outer circumferential edge of the roof truss 3 is connected to the upper arc beam 10; the roof support steel pipes 23 are single-pole upright columns or tree-shaped upright columns or V-shaped upright columns, the lower ends of the roof support steel pipes 23 are fixed on the top floor of the concrete frame building structure 27, and the upper ends of the roof support steel pipes are fixedly connected to the lower sides of the roof longitudinal trusses 32 and/or the lower sides of the roof transverse trusses 31; the roof truss 3 can be constructed and installed by using a conventional full-hall scaffold, and the stress of the whole roof truss 3 is dispersed to the concrete frame building structure 27 through a plurality of roof supporting steel pipes 23. The roof truss 3 comprises at least one roof transverse truss 31 and a plurality of roof longitudinal trusses 32, the plurality of roof longitudinal trusses 32 are arranged in parallel at intervals, the roof longitudinal trusses 32 are fixedly connected with the roof transverse truss 31, and the roof longitudinal trusses 32 are fixedly connected through a plurality of transverse steel pipes 33; the roof transverse truss 31 divides the roof longitudinal truss 32 into a front part and a rear part, the rear part of the roof longitudinal truss 32 is gentle, the front part of the roof longitudinal truss 32 has a certain gradient, and the front part of the roof longitudinal truss 32 is also provided with a lighting hole 34a.
As shown in fig. 4, the lighting hole 34a in the present application is surrounded by a three-layer steel pipe ring structure 34 fixed on the longitudinal truss 32 of the roof.
The steel net shell building structure is suitable for oversized space free-form surface steel grid structures such as large theatres, stadiums, airport terminal buildings, high-speed rail station houses, conference and exhibition centers and the like, and is matched with a concrete frame building structure 27 to form an integral building structure after being combined; in the application, the front gate direction of the integral building structure is a front direction, the corresponding position is a front position or a front side position, the opposite other direction is a rear position, the corresponding position is a rear position or a rear side position, when facing the gate, the left hand direction is a left direction, the corresponding position is a left position or a left side position, the right hand direction is a right direction, and the corresponding position is a right position or a right side position. The azimuth terms in the present application are used to facilitate description of the technical solutions in the present application, and are not limiting on the technical solutions.
Referring to fig. 5, a front vertical wall 1 is fixedly arranged on the ground, and a first supporting steel pipe 5 is arranged between the lower end of an arc-shaped large-arm steel pipe 4 and the ground; the lower ends of the left vertical wall 2a and the right vertical wall 2b are fixedly arranged on one floor of a concrete frame building structure 27, and second supporting steel pipes 6 are arranged between the first arc-shaped steel pipes 7 and the ground as well as between the second arc-shaped steel pipes 8 and the ground; the roof truss 3 is fixed on the top floor of the concrete frame building structure 27 through the roof supporting steel pipes 23, and the peripheral edge of the roof truss 3 is connected with the upper arc-shaped beam 10; a single pole column is arranged between the roofing longitudinal truss 32 and the top floor of the concrete frame building structure 27 for supporting the roofing longitudinal truss 32; v-shaped columns are provided between the roof truss 31 and the top floor of the concrete frame building structure 27 for supporting the roof truss 31.
Referring to fig. 5, a sunk square is disposed at a front side of a concrete frame building structure 27 matched with the steel mesh shell building structure in the present application, the ground of the vertical wall 1 before installation is the ground of the sunk square, and two sides of the sunk square are provided with a deck as a floor for installing the left vertical wall 2a and the right vertical wall 2 b; a floor in this application is broadly referred to as a lower floor, where the height is between the upper floor and the floor, rather than visually, and thus may be a two-floor or a three-floor as an equivalent alternative. The steel net shell building structure is mainly coated on the left side, the right side and the front side of the concrete frame building structure 27, the concrete frame building structure 27 can be a multi-layer building with more than five layers, a roof truss 3 is arranged above a top floor of the multi-layer building, the roof truss 3 is used as a top covering layer of the concrete frame building structure 27, and the roof truss 3 is connected with a front vertical wall 1 through an arc-shaped inclined arc-shaped large-arm steel pipe 4; the lower end of the arc-shaped large arm steel pipe 4 is fixedly connected with the front vertical wall 1, and a first supporting steel pipe 5 is arranged between the lower end of the arc-shaped large arm steel pipe and the ground, so that the arc-shaped large arm steel pipe 4 is supported, and vertical stress and lateral stress of the arc-shaped large arm steel pipe 4 are borne. The upper end of the arc-shaped large arm steel pipe 4 extends obliquely upwards and is fixedly connected with the upper arc-shaped beam 10, and part of side stress is transmitted to the concrete frame building structure 27 in a dispersed manner through the upper arc-shaped beam 10 and the roof truss 3; the first arc-shaped steel pipe 7 and the second arc-shaped steel pipe 8 are directly supported on the ground through the second supporting steel pipe 6, the two ends of the first arc-shaped steel pipe 7 are connected with the left vertical wall 2a and the arc-shaped large arm steel pipe 4, the two ends of the second arc-shaped steel pipe 8 are connected with the right vertical wall 2b and the arc-shaped large arm steel pipe 4, a stable and reliable integral three-dimensional structure is formed between the two ends of the second arc-shaped steel pipe 8, and therefore the weights of the left wing gentle slope steel net shell 13 and the right wing gentle slope steel net shell 14 can be effectively supported; the lower arc beam 9 is connected with the left vertical wall 2a and the right vertical wall 2b, is connected with the arc large-arm steel pipe 4, and is also connected with the upper arc beam 10 through the left wing abrupt slope steel net shell 11 and the right wing abrupt slope steel net shell 12, thereby forming an integral three-dimensional structure with the roof truss 3. The stress load of the whole structure is uniformly distributed, and each part is scientifically and reasonably designed, so that the safety of the structure can be ensured on the premise of using the supporting structure as little as possible. The two arc-shaped large-arm steel pipes 4 improve the bearing capacity; the two arc-shaped large-arm steel pipes 4 are arranged side by side, so that gentle slope sections 41 of the two arc-shaped large-arm steel pipes 4 are conveniently connected with the left wing gentle slope steel net shell 13 and the right wing gentle slope steel net shell 14 respectively, and steep slope sections 42 of the two arc-shaped large-arm steel pipes 4 are connected with the left wing steep slope steel net shell 11 and the right wing steep slope steel net shell 12 respectively; the steel mesh 15 between the two arc-shaped large-arm steel pipes 4 is used for installing a curtain wall, so that the condition that a large rod piece shields the sight of a middle part of the whole building is avoided, and meanwhile, direct butt joint between the left wing gentle slope steel mesh shell 13 and the right wing gentle slope steel mesh shell 14 and between the left wing abrupt slope steel mesh shell 11 and the right wing abrupt slope steel mesh shell 12 is avoided, so that the attractiveness of the whole building is improved. The stability and reliability between the two arc-shaped large arm steel pipes 4 are improved through the reinforcing support steel pipe 16, and particularly the deformation of the arc-shaped large arm steel pipes 4 caused by the stress transferred by the first arc-shaped steel pipe 7 and the second arc-shaped steel pipe 8 to the two arc-shaped large arm steel pipes 4 is reduced.
The wing district is radian abrupt change free curved surface individual layer steel mesh structure about the steel mesh building structure in this application, and maximum steel pipe specification is phi 900 x 48mm, and left wing gentle slope steel mesh 13 and right wing gentle slope steel mesh 14 are whole to be space torsion irregular curved surface molding, bilateral symmetry, and the boundary division is obvious, and first arc steel pipe 7 and second arc steel pipe 8 are major diameter thick wall return bend, and left wing abrupt slope steel mesh 11 and right wing abrupt slope steel mesh 12 are space individual layer inclined curved surface steel mesh, and the molding is light and graceful, left and right mirror symmetry, space height is big. The whole structure forms a multi-curved-surface building structure with large span, high and low inclined spans and large passages, the whole structure is attractive in appearance, the applied supporting structure is less, and the visual field is wide.
Referring to fig. 5 and 6, the arc-shaped large arm steel pipe 4 comprises a gentle slope section 41 at the lower end and a steep slope section 42 at the middle and upper ends, the left wing gentle slope steel net shell 13 and the right wing gentle slope steel net shell 14 are butted with the gentle slope section 41, and the left wing steep slope steel net shell 11 and the right wing steep slope steel net shell 12 are butted with the steep slope section 42. The arc-shaped large-arm steel pipe 4 is installed in a segmented mode, and a gentle slope section 41 of the arc-shaped large-arm steel pipe 4 is butted with the left wing gentle slope steel net shell 13 and the right wing gentle slope steel net shell 14; the gentle slope section 41 can set up temporary support steel pipe 24 during the installation, abrupt slope section 42 adopts hoist and mount and flexible cable to stabilize, the mode of correction is fixed a position the installation, arc big arm steel pipe 4 is as the main bearing member of sinking square top, be used for connecting left wing abrupt slope steel reticulated shell 11 and right wing abrupt slope steel reticulated shell 12 promptly, be used for again after installing steel mesh 15, divide assorted with the curtain unit, form structure, curtain integrated design, the length hinge of abrupt slope section 42 is long, the inclination is very big, vertical component that its produced is greater than vertical component, directly transmit its majority component to ground, realize big expert, few bearing structure's effect.
The span of the roof transverse truss 31 in the application can reach 67 meters, and the lowest point elevation of the whole building structure is as follows: -5.600m, highest point elevation: +52.299m, namely a horizontal datum plane with a floor of the concrete frame building structure 27 being 0m, the ground of the sinking square is 5.6m away from the floor, and the highest point of the upper arc beam 10 is 52.299m away from the floor; the upper end of the front vertical wall 1 is fixedly connected with a square pipe 1a, the square pipe 1a is connected with all welded rigid joints at the upper ends of all secondary rods of the front vertical wall 1, and the lower end of an arc-shaped large-arm steel pipe 4 is fixedly connected with the square pipe 1a in a welding mode. Two first support steel pipes 5 and two second support steel pipes 6 each have a maximum cross section of phi 1200mm x 80mm; referring to fig. 7, the first supporting steel pipe 5 may be composed of multiple sections, the lower end of the first supporting steel pipe 5 is connected with the embedded part by using a 4.8-level common bolt, the upper end of the first supporting steel pipe 5 is provided with a flange node connected with the first arc-shaped steel pipe 7, and a horizontal support or an inclined support is further connected between the flange node and the first arc-shaped steel pipe 7. The roof transverse truss 31 and the roof longitudinal truss 32 are composed of a plurality of curved steel pipes; the left wing gentle slope steel net shell 13, the right wing gentle slope steel net shell 14, the left wing abrupt slope steel net shell 11, the right wing abrupt slope steel net shell 12, the left wing triangular steel net frame 19, the right wing triangular steel net frame 20 below and the abrupt slope section 42 below of the arc large arm steel pipe 4 do not need to be provided with supporting steel pipes, the permeability of the inside of the steel net shell building structure is improved, and the whole visual field is wider. The steel reticulated shell building structure is suitable for a large space, has high requirement on integrity, simultaneously has a structure system of high-low span and light weight, reduces structural rod pieces to shield vision, and has a good overall space effect. The structural member not only serves as a supporting system, but also is matched with curtain wall unit division, and the structural member and curtain wall integrated design formed by combining the space steel net shell and the roof steel truss structure system is adopted, so that the structure is novel, and the appearance is atmospheric.
Referring to fig. 8, a single-pole upright post is arranged between the roof longitudinal truss 32 and the top floor of the concrete frame building structure 27 as a roof supporting steel pipe 23 for supporting the roof longitudinal truss 32, the lower end of the single-pole upright post is fixedly connected with an embedded part in the concrete frame building structure 27 through a bolt, and the upper end of the single-pole upright post is fixedly connected with the bottom of the roof longitudinal truss 32 through welding; referring to fig. 9, a V-shaped column is arranged between the roof transverse truss 31 and the top floor of the concrete frame building structure 27 as a roof supporting steel pipe 23 for supporting the roof transverse truss 31, the lower end of the V-shaped column is fixedly connected with an embedded part in the concrete frame building structure 27 through bolts, and the upper end of the V-shaped column is fixedly connected with two positions of the bottom of the roof transverse truss 31 through welding.
The embodiment also provides a construction process of the steep gentle slope radian abrupt change multi-curved-surface steel net shell building structure, which is used for constructing the same or similar steep gentle slope radian abrupt change multi-curved-surface steel net shell building structure, and specifically comprises the following steps:
s1, according to a building design drawing, planning a construction sequence diagram, dividing a front vertical wall 1, a left vertical wall 2a, a right vertical wall 2b, a left wing gentle slope steel net shell 13, a right wing gentle slope steel net shell 14, a left wing steep slope steel net shell 11, a right wing steep slope steel net shell 12, a left wing steep slope steel net shell 11, a left side steel net shell 21, a right side steel net shell 22, an arc-shaped large arm steel pipe 4, a steel grid 15 and a part of roof truss 3 in a steel net shell building structure into a plurality of assembly unit modules, prefabricating the steel net shells according to the required specification and size of each pipe fitting and rod piece in a factory, and conveying the prefabricated steel net shells to a construction site;
A concrete frame building structure 27 matched with the steel net shell building structure in the application is built in advance on a construction site, at least one assembly jig frame 25 is arranged on the front side, the left side and the right side of the concrete frame building structure 27 respectively, and all assembly unit modules are assembled in sequence according to a construction sequence diagram by configuring a crane meeting requirements;
referring to fig. 10, step S2 and step S3 are performed next, wherein step S2 is: each assembly unit module of the front vertical wall 1, the left vertical wall 2a and the right vertical wall 2b is assembled on an assembly jig frame 25 on the ground in sequence, and is lifted and installed to a preset position;
the step S3 is as follows: the left steel net shell 21 and the right steel net shell 22 are installed, each assembly unit module of the left steel net shell 21 and the right steel net shell 22 is assembled on an assembly jig 25 on the ground in sequence, and the assembly unit modules are lifted and installed to a preset position; building a roof truss 3 on the top floor of the concrete frame building structure 27;
the step S2 and the step S3 may be performed synchronously; or the step S2 is performed first, and then the step S3 is performed; step S3 can be performed first, and then step S2 can be performed;
then step S4 is performed: the gentle slope section 41 of the arc-shaped large-arm steel pipe 4 and the corresponding steel grid 15 are installed in a sectional lifting mode, the first arc-shaped steel pipe 7 and the second arc-shaped steel pipe 8 are installed in a sectional lifting mode, the third arc-shaped steel pipe 17 and the fourth arc-shaped steel pipe 18 are installed in a sectional lifting mode, the lower arc-shaped beam 9 is installed in a sectional lifting mode, and the left wing triangular steel net frame 19 and the right wing triangular steel net frame 20 are installed; in the step, according to the sectional positions, lengths and weights of the first arc-shaped steel pipe 7 and the second arc-shaped steel pipe 8, the temporary support steel pipe 24 is used for high-altitude sectional installation, two points are lifted in the lifting process of a crane, the single point is used for assisting in adjusting angles by using a chain block, wind-collecting assisting correction is pulled, the high-precision total station 26 is positioned in a three-dimensional coordinate mode, and the crane can be unhooked after all welding of the butt joint is completed;
Referring to fig. 11, step S5 is performed as follows: each assembly unit module of the left wing gentle slope steel net shell 13 and the right wing gentle slope steel net shell 14 is assembled on an assembly jig 25 on the ground in sequence, and each assembly unit module of the left wing gentle slope steel net shell 13 and the right wing gentle slope steel net shell 14 is lifted and installed to a preset position by adopting a sectional and piecewise and stage-by-stage unsupported symmetrical installation sequence;
referring to fig. 12, step S6 is performed as follows: the steep slope sections 42 of the arc-shaped large-arm steel pipes 4 and the corresponding steel grids 15 are sequentially lifted and installed, and in the process, flexible steel ropes are adopted for stabilizing and correcting;
at the same time, step S7 is performed: assembling the assembly unit modules of the left-wing steep slope steel net shell 11 and the right-wing steep slope steel net shell 12 on the assembling jig frame 25 on the ground in sequence, and hoisting and installing the assembly unit modules of the left-wing steep slope steel net shell 11 and the right-wing steep slope steel net shell 12 to preset positions by adopting a sectional and piecewise and stage-free symmetrical installation sequence;
s8, lifting and symmetrically installing the upper arc-shaped beams 10 in a segmented mode, welding and fixedly connecting the peripheral edge of the roof truss 3 with the upper arc-shaped beams 10, and embedding missing steel pipes;
s9, unloading the temporary support steel pipes 24 step by step from low to high and symmetrically left to right; in this step, the positioning template at the top end of the temporary support steel pipe 24 is cut during unloading, and the temporary support steel pipe 24 is separated from the steel net shell building structure by adopting the maximum deformation equal unloading process.
Further, the roof truss 3 in the application comprises a roof transverse truss 31 positioned in the middle and a plurality of roof longitudinal trusses 32, the roof longitudinal trusses 32 are fixedly connected through steel pipes, the roof transverse truss 31 positioned in the middle divides the roof longitudinal trusses 32 into a front part and a rear part, the front part is defined as a front area longitudinal truss, the rear part is defined as a rear area longitudinal truss, and the rear area longitudinal trusses are constructed and installed by adopting a full scaffold; the roof transverse truss 31 and the front area longitudinal truss are also divided into a plurality of assembled unit modules, after the step S8, each assembled unit module of the roof transverse truss 31 and the front area longitudinal truss is assembled on the ground assembled jig frame 25 in sequence before the step S9, and then the assembled unit modules are lifted, installed and fixed. And a lighting hole 34a structure formed by three layers of steel pipe annular structures 34 is also lifted and installed on the front-area longitudinal truss.
In this application, the left vertical wall 2a and the right vertical wall 2b can be divided into 5 assembled unit modules, the left wing triangular steel net frame 19 and the right wing triangular steel net frame 20 can be divided into at least 1 assembled unit module, the left wing gentle slope steel net shell 13 and the right wing gentle slope steel net shell 14 can be divided into 5 assembled unit modules, and the left wing steep slope steel net shell 11 and the right wing steep slope steel net shell 12 can be divided into 15 assembled unit modules. Referring to fig. 13, taking a left vertical wall 2a, a left wing triangular steel net frame 19, a left wing gentle slope steel net shell 13 and a left wing steep slope steel net shell 11 as examples, the left vertical wall 2a is sequentially provided with 5 spliced unit modules from back to front, and two adjacent spliced unit modules are connected by embedded steel pipes. The body weight of the left wing triangle steel net frame 19 is smaller, and only 1 assembly unit module with the number E4-1 is needed to be designed. The left wing gentle slope steel reticulated shell 13 is sequentially provided with 5 spliced unit modules from front to back, wherein the total number of the spliced unit modules is 5, and the total number of the spliced unit modules is E4-2, E4-3, E4-4, E4-5 and E4-6. The left wing abrupt slope steel net shell 11 is provided with 15 spliced unit modules numbered from E5-1 to E5-15, wherein the spliced unit module numbered from E5-2 is positioned above the spliced unit module numbered from E5-1, the spliced unit module numbered from E5-4 is positioned above the spliced unit module numbered from E5-3, the spliced unit module numbered from E5-12 is positioned above the spliced unit module numbered from E5-7, the spliced unit module numbered from E5-13 is positioned above the spliced unit module numbered from E5-8, the spliced unit module numbered from E5-14 is positioned above the spliced unit module numbered from E5-9, and the spliced unit module numbered from E5-15 is positioned above the spliced unit module numbered from E5-10, and splicing is performed in sequence from back to front and from bottom to top. All the parts are assembled in sequence according to the sequence of numbers.
The right vertical wall 2b and the left vertical wall 2a are symmetrically arranged, the right wing triangular steel net frame 20 and the left wing triangular steel net frame 19 are symmetrically arranged, the right wing gentle slope steel net shell 14 and the left wing gentle slope steel net shell 13 are symmetrically arranged, and the right wing abrupt slope steel net shell 12 and the left wing abrupt slope steel net shell 11 are symmetrically arranged.
Referring to fig. 14, the front vertical wall 1 is provided with 5 assembly unit modules from left to right, wherein the total number of the assembly unit modules is 5, and the arc-shaped large-arm steel pipe 4 and the corresponding steel grid 15 are divided into 6 assembly unit modules from bottom to top, namely, 6 assembly unit modules from left to right, namely, E1-1, E1-2, E1-3, E1-4 and E1-5, and the assembly unit modules are sequentially assembled according to the numbering sequence.
Referring to fig. 15, in the above steps S2, S5 and S7, before each assembly unit module is assembled on the assembly jig 25 on the ground, the overall modeling is performed, and the spatial three-dimensional coordinates of each assembly unit module are calculated and extracted and the positioning lofting is performed; according to the positioning lofting coordinates, a temporary support is arranged on the splicing jig 25, and the position and elevation of the temporary support are positioned by using the total station 26. The assembly site for installing the assembly jig frame 25 should have enough foundation strength and be convenient for hoisting, and the design of the assembly jig frame 25 should consider the requirements of bearing capacity, rigidity and stability. The assembly jig 25 is erected by adopting hot rolled HN200×100×5.5x8 steel in the application, the height of the assembly jig is 1000mm, and enough welding space is ensured; the spliced jig frame 25 is provided with a fixed sedimentation observation point, and sedimentation deformation is monitored periodically.
In the application, the three-dimensional coordinates of the ports are used for positioning the main pipe of each assembled unit module, the accuracy of the butt joint interface of the main pipe is adjusted, the welding line constraint code plates are arranged, and the assembly sequence of the secondary pipes is used for hoisting after the completion of pipe-pipe intersecting hidden welding line welding and the qualification detection. The accurate reliability of assembling of each assembling unit module can be ensured.
According to the form of the steel net shell building structure and the characteristic requirements of the concrete framework building structure 27, the arrangement position and the height of the supporting plane of each temporary supporting steel pipe 24 are determined, the supporting counter force is determined through the simulation analysis of the construction process, and the flange node independent steel pipe support or the combined steel pipe support is selected; referring to fig. 16, a positioning template and a limiting plate are provided at the top of the temporary support steel pipe 24, the bottom and the ground foundation slab or the concrete beam slab are welded and fixed by pre-buried plates, and whether the lower floor is reinforced by roof returning is determined according to the result of concrete structure inspection. Further, the temporary support steel pipe 24 is composed of multiple sections, two adjacent sections of the temporary support steel pipe 24 are connected through flange joints, the connection between the temporary support steel pipe 24 and the ground is spliced by using 4.8-level common bolts, and the connection between the temporary support steel pipe 24 and the horizontal support or the inclined support is realized by adopting flange clamp plate joints; the lower end of the temporary support steel pipe 24 is welded and fixed between a 7-shaped plate and an embedded part, and a positioning template is arranged at the top; the wind is pulled on four sides to adjust and correct in the installation process of the temporary support steel pipe 24, so that the hoisting safety is ensured.
The implementation principle is as follows: the steel latticed shell building structure built in the application is matched with the concrete frame building structure 27, and forms an integral building structure after being combined; during construction, firstly, a concrete frame building structure 27 is constructed, the concrete frame building structure 27 is a multi-layer building with more than five layers, a sinking type space is arranged in the middle of the front side of the concrete frame building structure 27, concrete floors are arranged in the sinking type space, low-layer terraces are arranged on two sides of the sinking type space, one or two layers of layer height designs can be arranged on the low-layer terraces relative to the concrete floors of the sinking type space, high-layer terraces are arranged on two sides, close to the middle part and the rear part, of the concrete frame building structure 27, the height of each high-layer terrace is smaller than the top layer height of the concrete frame building structure 27 and higher than the height of each low-layer terrace, and the three-layer or four-layer height can be designed generally; the front vertical wall 1 is arranged on the concrete floor of the sinking space, the left vertical wall 2a and the right vertical wall 2b are respectively arranged on low-layer terraces at two sides of the sinking space, the left steel net shell 21 and the right steel net shell 22 are built on high-layer terraces, the left steel net shell 21 is butted with the left wing steep slope steel net shell 11, and the right steel net shell 22 is butted with the right wing steep slope steel net shell 12; the heights of the left steel net shell 21 and the right steel net shell 22 extend upwards to exceed the height of the top floor of the concrete frame building structure 27, and the left side and the right side of the roof truss 3 are respectively in butt joint with the upper ends of the left steel net shell 21 and the right steel net shell 22.
The steep gentle slope radian abrupt change multi-curved-surface steel net shell building structure built in the method is of a large-span single-layer free-curved-surface steel net 15 structure, is generally carried out according to a construction process of supporting first and then flexible and stable, simplifies construction difficulty, improves construction efficiency, shortens construction period, and is obvious in economic benefit. The site construction follows the general welding principle of 'bottom-up, unified symmetry, partition and block and from inside to outside', and the temporary support steel pipes 24 are unloaded in the sequence of 'step-by-step, symmetry, slowness and balance' after the steel grids 15 are closed, so that the problem that the large-span single-layer free-form surface steel grid 15 structure is difficult to construct is solved. Meanwhile, a plurality of groups of assembling jig frames 25 can be arranged, the assembling jig frames are assembled through ground sections and fragments, so that the workload of overhead operation is reduced, a plurality of assembling unit modules can be assembled simultaneously, the construction operation surface is enlarged, the assembling period is shortened, the overall construction progress is accelerated, and the construction efficiency is improved. The construction method adopts scientific construction and management methods, meets various requirements of engineering quality, safety, construction period and economic indexes, has good reference function for similar engineering, and provides a method for related engineering construction in future. The accumulation of construction experience of the arc mutation curved steel grid 15 also provides a wider platform for the development of the future building industry.
In the method, the steel net shell pre-arching value is accurately determined through construction process simulation analysis before construction, the arching value is reserved in the modeling process, a safe and efficient heavy steel pipe supporting system is designed, hoisting machinery is reasonably selected, ground assembly is adopted, split hoisting is in place, flexible guy ropes are stable, symmetrical unloading is performed in groups, positioning accuracy is strictly controlled in the ground assembly and high-altitude installation process, deformation values are monitored in the unloading process, deformation of each structure is ensured to meet design and specification requirements, and experience reference and guidance are provided for similar complex space steel structure construction.
In the present application, the crane lifting machinery is selected according to the weight, the external dimension, the site, the space and other working conditions of the assembled unit modules, and as a preferred scheme, 1 300 ton crawler crane is selected as the main lifting machinery at the front side of the concrete frame building structure 27, and the main arm length of the crawler crane is 54m, the tower arm length is 42m, the turntable counterweight 130t and the vehicle body counterweight 50t. At a radius of 28m, the rated lifting weight of the crawler crane is 49.9t; at the radius of revolution of 54m, the rated lifting capacity of the crawler crane is 15.7t, and the rated lifting capacity is larger than the weight of the component, so that the lifting requirement is met. A 220 ton automobile crane is selected as a hoisting machine on the left side and the right side of the concrete frame building structure 27; the weight of the maximum hoisting unit of the automobile crane is smaller than 10t, the working condition of a main arm is adopted, the arm length is 62m, the maximum turning radius is 30m, the rated hoisting weight is 11.6t, and the hoisting requirement is met. According to the characteristics of the steel reticulated shell building structure, the construction quality is guaranteed, the safety risk is reduced, and under the premise of improving the construction efficiency, each part is divided into larger assembly unit modules as much as possible according to the mechanical property of the on-site hoisting equipment.
The temporary support steel pipe 24 is bent laterally by l/1000 and is not more than 50mm, and the overall verticality is H/1000 and is not more than 50mm; the grade of butt welding seams of the steel pipes is full penetration first grade, the grade of intersecting welding seams of the steel pipes is second grade, and the height hf of the welding seams is more than or equal to 0.7 plate thickness at the fillet welding seam part; the deflection value measured after the total splicing of the steel net shell building structure is completed is not more than 1.15 times of the deflection calculated value under the corresponding load condition; the pulling angle of the steel cable and the wind is not smaller than 30 degrees, and the anchoring point is ensured to be firm and reliable.
The embodiments of this embodiment are all preferred embodiments of the present application, and are not intended to limit the scope of the present application, in which like parts are denoted by like reference numerals. Therefore: all equivalent changes in structure, shape and principle of this application should be covered in the protection scope of this application.

Claims (10)

1. A steep gentle slope radian abrupt change multi-curved-surface steel reticulated shell building structure comprises a front vertical wall (1), a left vertical wall (2 a), a right vertical wall (2 b) and a roof truss (3);
the front vertical wall (1) is fixedly arranged on the ground, an arc-shaped large-arm steel pipe (4) which is inclined upwards is fixedly arranged at the upper end of the front vertical wall (1), and a first supporting steel pipe (5) is fixedly arranged between the lower end of the arc-shaped large-arm steel pipe (4) and the ground;
The lower ends of the left vertical wall (2 a) and the right vertical wall (2 b) are fixedly arranged on one floor of a concrete frame building structure (27), a first arc-shaped steel pipe (7) is arranged between the left vertical wall (2 a) and the arc-shaped large arm steel pipe (4), a second arc-shaped steel pipe (8) is arranged between the right vertical wall (2 b) and the arc-shaped large arm steel pipe (4), and a second supporting steel pipe (6) is arranged between the first arc-shaped steel pipe (7) and the ground as well as between the second arc-shaped steel pipe (8);
the middle part of the arc big arm steel pipe (4) is fixedly provided with a lower arc beam (9) extending towards the left side and the right side of the arc big arm steel pipe (4), the upper end of the arc big arm steel pipe (4) is fixedly provided with an upper arc beam (10) extending towards the left side and the right side of the arc big arm steel pipe (4), a left wing abrupt slope steel net shell (11) is arranged between the lower arc beam (9) and the upper arc beam (10) which are positioned at the left side of the arc big arm steel pipe (4), and a right wing abrupt slope steel net shell (12) is arranged between the lower arc beam (9) and the upper arc beam (10) which are positioned at the right side of the arc big arm steel pipe (4);
a left wing gentle slope steel net shell (13) is arranged between the lower arc beam (9) positioned on the left side of the arc large arm steel pipe (4) and the upper end of the left vertical wall (2 a) and between the lower arc beam (9) positioned on the right side of the arc large arm steel pipe (4) and the upper end of the right vertical wall (2 b) and between the lower arc beam (9) positioned on the right side of the arc large arm steel pipe and the second arc steel pipe (8), and a right wing gentle slope steel net shell (14) is arranged between the lower arc beam and the upper end of the right vertical wall (2 b);
The roof truss (3) is fixed on the top floor of the concrete frame building structure (27) through a roof supporting steel pipe (23), and the peripheral edge of the roof truss (3) is connected with the upper arc beam (10).
2. The steep gentle slope radian abrupt change multi-curved-surface steel net shell building structure according to claim 1, wherein the arc-shaped large-arm steel pipe (4) comprises a gentle slope section (41) positioned at the lower end and steep slope sections (42) positioned at the middle and upper ends, the left wing gentle slope steel net shell (13) and the right wing gentle slope steel net shell (14) are in butt joint with the gentle slope sections (41), and the left wing steep slope steel net shell (11) and the right wing steep slope steel net shell (12) are in butt joint with the steep slope sections (42).
3. The steep and gentle slope radian abrupt change multi-curved-surface steel net shell building structure according to claim 1 or 2, wherein the number of the arc-shaped large-arm steel pipes (4) is two, the two arc-shaped large-arm steel pipes (4) are arranged at left and right intervals, the end part of the first arc-shaped steel pipe (7) is fixedly connected to the outer side of the arc-shaped large-arm steel pipe (4) positioned at the left side, the end part of the second arc-shaped steel pipe (8) is fixedly connected to the outer side of the arc-shaped large-arm steel pipe (4) positioned at the right side, and a steel grid (15) formed by crisscrossed steel pipes is arranged between the two arc-shaped large-arm steel pipes (4);
And a reinforced support steel pipe (16) is further arranged between the two arc-shaped large-arm steel pipes (4), and two ends of the reinforced support steel pipe (16) are respectively fixedly connected to the inner sides of the two arc-shaped large-arm steel pipes (4) and respectively correspond to the end parts of the first arc-shaped steel pipes (7) and the end parts of the second arc-shaped steel pipes (8).
4. The steep and gentle slope radian abrupt change multi-curved-surface steel reticulated shell building structure according to claim 1 or 2, characterized in that a third arc-shaped steel pipe (17) is fixedly connected between the upper end of the left side of the front vertical wall (1) and the middle part of the first arc-shaped steel pipe (7), a left wing triangular area is formed between the third arc-shaped steel pipe (17) and the first arc-shaped steel pipe (7) and between the third arc-shaped steel pipe and the arc-shaped large arm steel pipe (4) positioned on the left side, and a left wing triangular steel truss (19) is arranged in the left wing triangular area; a fourth arc-shaped steel pipe (18) is fixedly connected between the upper end of the right side of the front vertical wall (1) and the middle of the second arc-shaped steel pipe (8), a right wing triangular area is formed between the fourth arc-shaped steel pipe (18) and the second arc-shaped steel pipe (8) and the arc-shaped large arm steel pipe (4) positioned on the right side, and a right wing triangular angle steel net rack (20) is arranged in the right wing triangular area.
5. The steep and gentle slope radian abrupt change multi-curved-surface steel reticulated shell building structure according to claim 1 or 2, wherein a left steel reticulated shell (21) and a right steel reticulated shell (22) are respectively arranged on the left side and the right side of the roof truss (3); the left steel net shell (21) is connected with the left wing steep slope steel net shell (11), and the right steel net shell (22) is connected with the right wing steep slope steel net shell (12);
The roof truss (3) comprises at least one roof transverse truss (31) and a plurality of roof longitudinal trusses (32), the plurality of roof longitudinal trusses (32) are arranged at intervals in parallel, the roof longitudinal trusses (32) are fixedly connected with the roof transverse truss (31), and the roof longitudinal trusses (32) are fixedly connected through a plurality of transverse steel pipes (33); the roof support steel pipes (23) are single-pole stand columns or tree-shaped stand columns or V-shaped stand columns, the lower ends of the roof support steel pipes (23) are fixed on the top floor of the concrete frame building structure (27), and the upper ends of the roof support steel pipes are fixedly connected to the lower sides of the roof longitudinal trusses (32) and/or the lower sides of the roof transverse trusses (31).
6. A construction process for constructing the steep gentle slope radian mutation multi-curved steel reticulated shell building structure according to any one of claims 1 to 5, characterized in that the construction process comprises the following steps:
s1, dividing a front vertical wall (1), a left vertical wall (2 a), a right vertical wall (2 b), a left wing gentle slope steel net shell (13), a right wing gentle slope steel net shell (14), a left wing abrupt slope steel net shell (11) and a right wing abrupt slope steel net shell (12) in a steel net shell building structure into a plurality of assembly unit modules according to a building design drawing, prefabricating each section of steel pipes in a factory, and then conveying the steel pipes to a construction site;
S2, sequentially assembling each assembling unit module of the front vertical wall (1), the left vertical wall (2 a) and the right vertical wall (2 b) on an assembling jig frame (25) on the ground, and hoisting and installing the assembling unit modules to a preset position;
s3, building a roof truss (3) on the top floor of the concrete frame building structure (27);
s4, installing temporary support steel pipes (24) at preset positions of a concrete frame building structure (27), and hoisting and installing gentle slope sections (41), first arc steel pipes (7), second arc steel pipes (8), third arc steel pipes (17), fourth arc steel pipes (18) and lower arc beams (9) at the lower ends of the arc large arm steel pipes (4) in a segmented mode;
s5, sequentially assembling each assembly unit module of the left wing gentle slope steel net shell (13) and the right wing gentle slope steel net shell (14) on an assembly jig (25) on the ground, and hoisting and installing each assembly unit module of the left wing gentle slope steel net shell (13) and each assembly unit module of the right wing gentle slope steel net shell (14) to a preset position in a segmented and piecewise and unsupported symmetrical installation mode;
s6, hoisting and installing steep slope sections (42) at the middle and upper ends of the arc-shaped large-arm steel pipes (4) in sequence, and stabilizing and correcting by adopting flexible steel cables;
s7, sequentially assembling each assembly unit module of the left wing abrupt slope steel net shell (11) and the right wing abrupt slope steel net shell (12) on an assembly jig (25) on the ground, and hoisting and installing each assembly unit module of the left wing abrupt slope steel net shell (11) and each assembly unit module of the right wing abrupt slope steel net shell (12) to a preset position in a segmented and piecewise and unsupported symmetrical installation mode and in sequence;
S8, carrying out sectional lifting, symmetrically and sequentially installing upper arc beams (10), welding and fixedly connecting the periphery of a roof truss (3) with the upper arc beams (10), and embedding missing steel pipes;
s9, unloading the temporary support steel pipes (24) step by step from low to high and symmetrically left to right.
7. The construction process of the steep gentle slope radian abrupt change multi-curved steel net shell building structure according to claim 6, wherein in the step S2, a front vertical wall (1) is installed on the ground, a symmetrical left vertical wall (2 a) and right vertical wall (2 b) are installed on a floor of the concrete frame building structure (27), the left vertical wall (2 a) and the right vertical wall (2 b) are respectively located at left and right sides of the front vertical wall (1), and the left vertical wall (2 a) and the right vertical wall (2 b) are respectively arranged at intervals from the front vertical wall (1) and are respectively located at rear positions of the front vertical wall (1).
8. The construction process of the steep and gentle slope radian abrupt change multi-curved-surface steel reticulated shell building structure according to claim 6 or 7, wherein in the step S2, the step S5 and the step S7, before assembling each assembled unit module on the ground assembled jig frame (25), the overall modeling is performed, and the space three-dimensional coordinates of each assembled unit module are calculated and extracted and positioned and lofted; according to the positioning lofting coordinates, a temporary support is arranged on the spliced jig frame (25), and the position and elevation of the temporary support are positioned by using a total station (26).
9. The construction process of the steep and gentle slope radian abrupt change multi-curved-surface steel reticulated shell building structure according to claim 6 or 7, characterized in that the arrangement position and the height of the supporting plane of each temporary supporting steel pipe (24) are determined according to the form of the steel reticulated shell building structure and the characteristic requirement of a concrete framework building structure (27), the supporting counter force is determined through the simulation analysis of the construction process, and the flange node independent steel pipe support or the combined steel pipe support is selected; the top of the temporary support steel pipe (24) is provided with a positioning template and a limiting plate, the bottom and the ground foundation slab or the concrete beam slab are welded and fixed through an embedded plate, and whether the lower floor is subjected to roof returning reinforcement is determined according to the experimental result of the concrete beam slab structure.
10. The construction process of the steep and gentle slope radian abrupt change multi-curved-surface steel reticulated shell building structure according to claim 6 or 7, characterized in that in the step S4, according to the sectional positions, lengths and weights of the first arc-shaped steel pipe (7) and the second arc-shaped steel pipe (8), the temporary support steel pipe (24) is used for high-altitude sectional installation, two points are lifted in the lifting process of the crane, the single point is lifted by using a chain block to assist in adjusting an angle, wind-pulling auxiliary correction is carried out, the total station (26) is positioned in three-dimensional coordinates, and the crane can be unhooked after the whole butt joint is welded;
In the step S9, the positioning template at the top end of the temporary support steel pipe (24) is cut, and the temporary support steel pipe (24) is separated from the steel mesh shell building structure by adopting the maximum deformation and equal unloading process.
CN202210779967.9A 2022-07-04 2022-07-04 Steep gentle slope radian abrupt change multi-curved-surface steel reticulated shell building structure and construction process thereof Active CN115341653B (en)

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