CN111255075A - Construction method of arched evacuated bolt ball latticed shell structure - Google Patents
Construction method of arched evacuated bolt ball latticed shell structure Download PDFInfo
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- CN111255075A CN111255075A CN202010084851.4A CN202010084851A CN111255075A CN 111255075 A CN111255075 A CN 111255075A CN 202010084851 A CN202010084851 A CN 202010084851A CN 111255075 A CN111255075 A CN 111255075A
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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
- E04B1/32—Arched structures; Vaulted structures; Folded structures
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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
- E04B1/32—Arched structures; Vaulted structures; Folded structures
- E04B2001/3229—Arched structures; Vaulted structures; Folded structures constructed using a boom
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Abstract
A construction method of an arch evacuated bolt spherical reticulated shell structure is characterized in that according to the structural characteristics of the arch evacuated reticulated shell, a constraint rod piece is adopted to control node displacement, and a reasonable small-unit hoisting sequence is designed, so that an operator can safely move on a net rack, tighten bolts and disassemble lifting ropes; the tower support does not need to be additionally arranged, and the crane does not need to be operated by auxiliary personnel; the hoisting speed is basically not influenced. The invention mainly solves the problem of installation cost, and has the characteristics of low safety risk, easy guarantee of construction quality and the like.
Description
Technical Field
The invention relates to a steel structure technology, in particular to a steel structure latticed shell construction technology, and specifically relates to a construction method of an arch evacuated bolt ball latticed shell structure.
Background
For decades, arch-shaped latticed shell products are widely applied to industries such as coal, electric power, cement, steel, chemical industry and the like, the demand of domestic and foreign markets is large, and in order to effectively save steel and reduce project cost, the evacuated latticed shell (the latticed shell is discontinuous in the length direction, more than one unit of gap exists between adjacent latticed shells, and the gap can be covered by a steel plate ceiling) is always a structural form considered by designers and engineering technicians. How to reduce the installation cost of the evacuated reticulated shell is a problem for the exploration of the whole brain juice of professional technicians for many years.
Disclosure of Invention
The invention aims to provide a construction method of an arched evacuated bolt ball latticed shell structure, which can obviously reduce the construction cost of an evacuated latticed shell, aiming at the problems that the construction process is more complicated and the cost is not reduced and increased reversely although the steel consumption of the conventional evacuated latticed shell can be reduced.
The technical scheme of the invention is as follows:
a construction method of an arch evacuated bolt ball latticed shell structure is characterized by comprising the following steps:
firstly, rechecking the parameters of the axis, the elevation and the position of a supporting surface of a net rack foundation and determining a net shell forming starting section; selecting a non-evacuation position and a gable position as a starting section;
secondly, selecting the size of the starting unit through simulation checking calculation according to the standard value of the ground wind load and the temperature condition during installation so as to meet the requirement that the starting unit is used as an independent supporting structure;
thirdly, carrying out simulation checking calculation by using design software according to the installation working condition, and selecting a lifting point, the size of a crane and the specification of a sling;
fourthly, after the starting unit is installed, assembling and hoisting small units;
fifthly, aiming at the evacuated part, a constraint member is added, wherein the constraint member comprises a bolt ball joint, a web member and a chord member which have the same function; the constraint rod pieces and the nodes need to be designed and checked; the step-up section of the evacuation reticulated shell is not limited by the evacuation node; in the small unit hoisting stage, all the nodes at the evacuation positions are in a completely constrained state so as to ensure the safety of climbing and staying of construction personnel at the evacuation nodes; the method comprises the following steps of strictly carrying out aerial assembly according to a set small unit hoisting sequence, and enabling each node to be in a completely constrained state during installation;
and sixthly, installing nodes of the constraint rod pieces, removing the constraint rod pieces in time after the axis is arched, and sequentially placing the constraint rod pieces for recycling until the whole latticed shell is installed.
The installation direction of the arch is required to be from bottom to top.
The climbing of the balls and the rod pieces in the non-complete constraint state is forbidden, and the constraint rod pieces or the constraint nodes are added, so that each node is ensured to be in the complete constraint state, and the safety of the personnel and the node structure is ensured under the condition of not needing a tower and a crane for assistance.
The variable sequence process is adopted to ensure that each small unit is in a complete constraint state when being installed, and the constraint rod pieces are adopted when needed, so that the number of the constraint rod pieces is reduced to the maximum extent; for locations with few evacuation nodes, the restraining bar may not be used by changing the order.
The invention has the beneficial effects that:
the invention not only reduces the steel consumption, reduces the raw material cost by 10-20%, but also obviously improves the construction cost and the safety, compared with the construction process under the same condition, the invention has the advantages that the installation cost is greatly reduced, and the installation cost is equal to or slightly reduced (the number of small units is reduced, and the daily output of the crane is basically the same) compared with the non-evacuated net rack. See table below.
The invention is not only suitable for the construction of connecting reticulated shells, but also suitable for the construction of discontinuous reticulated shells (comprising upper and lower chord members, bolt ball joints and the like, such as expansion joints).
According to the structural characteristics of the arched evacuated latticed shell, the node displacement is controlled by the constraint rod pieces, and the reasonable small-unit hoisting sequence is designed, so that an operator can safely move on the net rack, tighten bolts and disassemble lifting ropes; the tower support does not need to be additionally arranged, and the crane does not need to be operated by auxiliary personnel; the hoisting speed is basically not influenced. The construction process mainly solves the problem of installation cost, and has the characteristics of low safety risk, easy guarantee of construction quality and the like.
Drawings
Figure 1 is a schematic top view of the dome shaped evacuated bolt ball grid shell of the present invention.
Fig. 2 is a schematic view of the present invention defining the installation direction.
Figure 3 is a schematic drawing of the lower chord evacuation of the present invention.
Fig. 4 is a schematic view of the launch section restraining bar installation of the present invention.
Fig. 5 is a schematic view of the installation of the small cell restraining bar of the present invention.
Fig. 6 is a schematic diagram of the variable-sequence assembling and hoisting of the invention, wherein 1,2 and 3.
Detailed Description
The invention is further described below with reference to the figures and examples.
As shown in fig. 1-6.
A construction method of an arch-shaped evacuated bolt ball net shell structure comprises the following steps:
firstly, rechecking the parameters of the axis, the elevation and the position of a supporting surface of a net rack foundation and determining a net shell forming starting section; selecting a non-evacuation position and a gable position as a starting section;
secondly, selecting the size of the starting unit through simulation checking calculation according to the standard value of the ground wind load and the temperature condition during installation so as to meet the requirement that the starting unit is used as an independent supporting structure;
thirdly, carrying out simulation checking calculation by using design software according to the installation working condition, and selecting a lifting point, the size of a crane and the specification of a sling;
fourthly, after the starting unit is installed, assembling and hoisting small units;
fifthly, aiming at the evacuated part, a constraint member is added, wherein the constraint member comprises a bolt ball joint, a web member and a chord member which have the same function; the constraint rod pieces and the nodes need to be designed and checked; the step-up section of the evacuation reticulated shell is not limited by the evacuation node; in the small unit hoisting stage, all the nodes at the evacuation positions are in a completely constrained state so as to ensure the safety of climbing and staying of construction personnel at the evacuation nodes; the method comprises the following steps of strictly carrying out aerial assembly according to a set small unit hoisting sequence, and enabling each node to be in a completely constrained state during installation;
sixthly, installing the node of the constraint rod piece, dismantling the constraint rod piece in time after the axis is arched, and placing the constraint rod piece in sequence for recycling until the whole reticulated shell is installed, so as to obtain the evacuated bolt ball reticulated shell shown in the figure 1. The installation direction of the arch must be from bottom to top as shown in fig. 2.
Fig. 3 is a schematic of a lower system evacuation. Fig. 4 is a schematic view of the installation of the starting section restraining bar, and fig. 5 is a schematic view of the small unit restraining bar used in the present invention and the installation thereof. Fig. 6 is a schematic diagram of variable-order assembly according to the present invention.
The key steps and control points of the specific implementation process are as follows:
firstly, rechecking all parameters of the basic axis, the elevation, the position of a supporting surface and the like of the net rack, and determining a net shell forming starting section; the evacuation latticed shell preferably selects a non-evacuation position and a gable position as a starting section, and if the evacuation position is selected as the starting position, the steps of the method are preferably combined with currently popularized two-piece, three-piece, multi-piece, inverted installation, single-side arching and other arching technologies.
Secondly, according to the standard value of the ground wind load and the temperature condition during installation, the size of the starting unit is selected through simulation and verification so as to meet the requirement that the starting unit is used as an independent supporting structure.
Thirdly, simulation checking calculation is carried out by utilizing design software according to the installation working condition and the market condition, and a hoisting point, the size of a crane and the specification of a sling are selected.
Fourthly, after the starting unit is installed, small units are assembled and hoisted.
Fifthly, aiming at the evacuation part, technicians select splicing and hoisting sequences according to the structural conditions, disassemble the node diagram, and clearly mark the positions needing to be added with the restraint rods on the node diagram.
And sixthly, installing the node of the constraint rod piece, dismantling the node in time (without influencing the structure) after the axis is arched, and placing the node in sequence for recycling.
For safety and engineering quality considerations, the installation direction of the arch must be from bottom to top (as shown in fig. 2).
The climbing is prohibited by balls and rod pieces in a non-complete constraint state, constraint rod pieces or constraint nodes are added, namely, each node is ensured to be in a complete constraint state, and the safety of personnel and node structures is guaranteed under the condition that a tower and a crane are not needed for assistance.
The normal splicing and hoisting sequence refers to the installation of the lower chord after the upper chord is closed along the arch direction, and the normal splicing and hoisting sequence is carried out in sequence; the strain sequence process is adopted, namely the sequence is broken, the small units are ensured to be in a complete constraint state when being installed, and the constraint rod pieces are adopted when needed, so that the number of the constraint rod pieces is reduced to the maximum extent. For locations with few evacuation nodes, the restraining bar may not be used by changing the order. This work is determined by the designer, technician plan.
The parts not involved in the present invention are the same as or can be implemented using the prior art.
Claims (4)
1. A construction method of an arch evacuated bolt ball latticed shell structure is characterized by comprising the following steps:
firstly, rechecking the parameters of the axis, the elevation and the position of a supporting surface of a net rack foundation and determining a net shell forming starting section; selecting a non-evacuation position and a gable position as a starting section;
secondly, selecting the size of the starting unit through simulation checking calculation according to the standard value of the ground wind load and the temperature condition during installation so as to meet the requirement that the starting unit is used as an independent supporting structure;
thirdly, carrying out simulation checking calculation by using design software according to the installation working condition, and selecting a lifting point, the size of a crane and the specification of a sling;
fourthly, after the starting unit is installed, assembling and hoisting small units;
fifthly, aiming at the evacuated part, a constraint member is added, wherein the constraint member comprises a bolt ball joint, a web member and a chord member which have the same function; the constraint rod pieces and the nodes need to be designed and checked; the step-up section of the evacuation reticulated shell is not limited by the evacuation node; in the small unit hoisting stage, all the nodes at the evacuation positions are in a completely constrained state so as to ensure the safety of climbing and staying of construction personnel at the evacuation nodes; the method comprises the following steps of strictly carrying out aerial assembly according to a set small unit hoisting sequence, and enabling each node to be in a completely constrained state during installation;
and sixthly, installing nodes of the constraint rod pieces, removing the constraint rod pieces in time after the axis is arched, and sequentially placing the constraint rod pieces for recycling until the whole latticed shell is installed.
2. The method as claimed in claim 1, wherein the installation direction of the arch is from bottom to top.
3. The method of claim 1, wherein said non-fully constrained balls or bars are prevented from climbing, and the addition of constraining bars or constraining nodes ensures that each node is fully constrained, ensuring personnel and node structural safety without the need for towers or cranes.
4. The method as claimed in claim 1, wherein a variable sequence process is used to ensure that each cell is in a fully constrained state when installed, and constraining members are used when needed to minimize the number of constraining members; for locations with few evacuation nodes, the restraining bar may not be used by changing the order.
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| CN202010084851.4A CN111255075B (en) | 2020-02-10 | 2020-02-10 | Construction method of arched evacuated bolt ball latticed shell structure |
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| CN202010084851.4A CN111255075B (en) | 2020-02-10 | 2020-02-10 | Construction method of arched evacuated bolt ball latticed shell structure |
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| CN111255075B CN111255075B (en) | 2021-04-20 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111877558A (en) * | 2020-08-17 | 2020-11-03 | 徐州中煤汉泰建筑工业化有限公司 | Deflection control method for arched bolt ball latticed shell structure of hanging operation equipment |
| CN113502923A (en) * | 2021-06-30 | 2021-10-15 | 中国二十二冶集团有限公司 | Construction method for assisting second start-free of reticulated shell structure at expansion joint |
| CN115233830A (en) * | 2022-05-18 | 2022-10-25 | 中交第三航务工程局有限公司江苏分公司 | Construction method of net rack starting unit for middle lifting arch |
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| US20010022189A1 (en) * | 2000-03-14 | 2001-09-20 | Gerd Hexels | Camouflage shelter having a collapsible self-supporting subframe |
| DE102004061485A1 (en) * | 2004-12-21 | 2006-06-29 | Tuczek, Florian, Dipl.-Ing. Architekt | Double curved shell |
| CN201326244Y (en) * | 2008-09-16 | 2009-10-14 | 晟元集团有限公司 | Rightly placed evacuating quadrangular pyramid space truss structure |
| US20120151868A1 (en) * | 2009-08-27 | 2012-06-21 | Industry Foundation Of Chonnam National University | 3-dimensional lattice truss structure composed of helical wires and method for manufacturing the same |
| CN105863060A (en) * | 2016-06-17 | 2016-08-17 | 上海理工大学 | Bamboo three-way grid type reticulated shell |
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2020
- 2020-02-10 CN CN202010084851.4A patent/CN111255075B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20010022189A1 (en) * | 2000-03-14 | 2001-09-20 | Gerd Hexels | Camouflage shelter having a collapsible self-supporting subframe |
| DE102004061485A1 (en) * | 2004-12-21 | 2006-06-29 | Tuczek, Florian, Dipl.-Ing. Architekt | Double curved shell |
| CN201326244Y (en) * | 2008-09-16 | 2009-10-14 | 晟元集团有限公司 | Rightly placed evacuating quadrangular pyramid space truss structure |
| US20120151868A1 (en) * | 2009-08-27 | 2012-06-21 | Industry Foundation Of Chonnam National University | 3-dimensional lattice truss structure composed of helical wires and method for manufacturing the same |
| CN105863060A (en) * | 2016-06-17 | 2016-08-17 | 上海理工大学 | Bamboo three-way grid type reticulated shell |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111877558A (en) * | 2020-08-17 | 2020-11-03 | 徐州中煤汉泰建筑工业化有限公司 | Deflection control method for arched bolt ball latticed shell structure of hanging operation equipment |
| CN113502923A (en) * | 2021-06-30 | 2021-10-15 | 中国二十二冶集团有限公司 | Construction method for assisting second start-free of reticulated shell structure at expansion joint |
| CN115233830A (en) * | 2022-05-18 | 2022-10-25 | 中交第三航务工程局有限公司江苏分公司 | Construction method of net rack starting unit for middle lifting arch |
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