CN103628680B - Large steel space truss hanging layer construction method - Google Patents

Large steel space truss hanging layer construction method Download PDF

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Publication number
CN103628680B
CN103628680B CN201310577155.7A CN201310577155A CN103628680B CN 103628680 B CN103628680 B CN 103628680B CN 201310577155 A CN201310577155 A CN 201310577155A CN 103628680 B CN103628680 B CN 103628680B
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hanging
roof
concrete
steel
floor
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CN103628680A (en
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吴卫
刘月军
刘学树
李铁英
柴静
王洪昆
梁书新
霍健
宋红智
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TIANJIN SANJIAN CONSTRUCTION ENGINEERING Co Ltd
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TIANJIN SANJIAN CONSTRUCTION ENGINEERING Co Ltd
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Abstract

The invention discloses a kind of large steel space truss hanging layer construction method, the erection sequence of described construction method adopts the erection sequence from bottom to top first supporting and hang afterwards with first off-load after-pouring floorslab concrete, described first support is hung and the operation of technique of construction of first off-load after-pouring roof system and hanging floor board concrete is respectively afterwards: first supports the working procedure hung afterwards and comprise: the installation of hanging layer and roof system steel truss temporary support, hanging floor steel beam lifting and connection, the lifting of roof system steel truss and connection, high-strength steel bar installs location; The working procedure of first off-load after-pouring roof system and hanging floor board concrete comprises; The off-load of hanging layer steel work, rooftop air conditioning unit off-load, roof system concreting, hanging floor plate subregion concreting, according to hanging floor levels regulating error rod iron.Construction method of the present invention solves the lifting construction that conventional erection sequence from top to bottom cannot carry out hanging structure, the difficult problem solving hanging layer Floor Slab Deformation and easily ftracture.The inventive method is applicable to the installation of the multi-storey steel structure hanging layer arranged under steel worm-gearing.

Description

Large steel space truss hanging layer construction method
Technical field
The present invention relates to a kind of steel work hanging layer construction method, particularly relate to large steel space truss hanging layer construction method, belong to steel building technical field.
Background technology
In the building adopting Large Steel trussed roof, the multilayer floor slab below roof system steel truss can adopt steel to hang Rotating fields.Steel hanging Rotating fields can give full play to the carrying effect of roofing steel truss, saves the vertical structure material of inner floor, meets the requirement of building interior large space simultaneously.
Tianjin grand theater engineering, be Tianjin cultural construction key project, its structure is by roof system steel truss, the structure composition of complex forms such as hanging layer and reinforced concrete shear wall etc., wherein hang layer and be arranged on absolute altitude 16m and 21m under roof system steel truss, form two-layer hanging floor, area is close to 8000m 2, long 210m, the widest part reaches 55m.Roof system steel truss is by reinforced concrete shear wall barrel support.
Described hanging layer is steel work hanging layer, also known as hanging floor, its structure by hanging a layer girder steel, the concrete floor composition above the hanging profiled sheet of layer girder steel top and profiled sheet; Between roof system steel truss and hanging layer girder steel, be provided with length-adjustable hanging rod iron, described hanging rod iron hangs and is located at roof system steel truss bottom;
The path of the stressed transmission of hanging Rotating fields is for transmit from bottom to top, and therefore conventional erection sequence from top to bottom cannot carry out lifting construction to large-area hanging layer.How implementing the construction of large steel space truss hanging layer, is steel building engineering circles engineers and technicians research topics urgently to be resolved hurrily.
Summary of the invention
Object of the present invention, a kind of large steel space truss is provided to hang layer construction method, described construction method, for adopting 1, first support hang afterwards and 2, the construction method from bottom to top of first off-load after-pouring roof system and hanging floor board concrete, this construction method solves the problem that conventional erection sequence from top to bottom cannot carry out the construction of large steel space truss hanging layer, solves a difficult problem for hanging layer Floor Slab Deformation and easy cracking.
For achieving the above object, the technical side adopted is in the present invention:
A kind of large steel space truss hanging layer construction method, its erection sequence routine is erection sequence from top to bottom, it is characterized in that: its erection sequence is erection sequence from bottom to top, described steel work hanging layer, its structure is by hanging a layer girder steel, hanging layer concrete floor above the hanging profiled sheet of layer girder steel top and profiled sheet is formed, length-adjustable hanging rod iron is provided with between roof truss and hanging girder steel, hang and be located at roof system steel truss bottom hanging rod iron, for H profile steel, material is Q345B, described erection sequence from bottom to top, for adopting 1) first support hang afterwards and 2) erection sequence from bottom to top of first off-load after-pouring roof system and hanging floor board concrete, described 1) first support hang afterwards and 2) first off-load after-pouring roof system, the operation of the technological process of floorslab concrete is respectively:
1) first support and hang afterwards, technique of its construction comprises following operation:
1-0 has first constructed and has supported the concrete structure of integral roof, comprises concrete column or concrete shear force wall cylindrical shell,
1-1 hangs the installation of layer and roof system steel truss temporary support,
1-2 hangs floor steel beam lifting and connection,
The lifting of 1-3 roof system steel truss and connection,
1-4 high-strength steel bar installs location;
2) first off-load after-pouring roof system and hanging floor board concrete, the technique of its construction comprises following operation:
The off-load of 2-1 rooftop air conditioning unit,
2-2 hangs the off-load of layer steel work,
The concreting of 2-3 roof system,
2-4 hangs floor plate subregion concreting
2-5 is according to hanging floor levels regulating error rod iron;
Described 1), first support hang afterwards and 2) operation of the technological process of first off-load after-pouring roof system and hanging floor board concrete, concrete operations are as follows respectively:
1), first support and hang afterwards
1-0 has first constructed and has supported the concrete structure of integral roof, comprises concrete column or concrete shear force wall cylindrical shell,
1-1 hangs the installation of layer and roof system steel truss temporary support
Temporary support, for the temporary support adopting produce in factory to become the form of standard knot, be transported to onsite application, the temporary support that scene is set up is that the lifting fragment bit adopting crawler crane temporary support to be placed in the segmental hoisting construction of hanging layer girder steel and roof system steel truss is set up;
1-2 hangs floor steel beam lifting and connection
Adopt crawler crane that hanging floor girder steel segmental hoisting is carried out installation at high altitude, temporary fixed connection on temporary support;
The lifting of 1-3 roof system steel truss and connection
Adopt crawler crane by roof system steel truss segmental hoisting on temporary support top, carry out temporary fixed connection, then accurately in place, welding is linked to be integral roof; Make the load transfer of roof system on the concrete column supporting roof system or tube shear wall, this is " first supporting ";
1-4 high-strength steel bar installs location
After the installation of roof system steel truss, high-strength steel bar between roof system steel truss and hanging floor girder steel is installed again, hanging floor girder steel is connected with the prefabricated accessory of roof system Truss Joint by high-strength bolt by described high-strength steel bar, under hanging floor girder steel is hung in roof system steel truss, this is " hanging afterwards ";
2, first off-load after-pouring roof system and hanging floor board concrete
The off-load of 2-1 rooftop air conditioning unit and hanging layer steel work off-load construction
Unloading principle
After hanging layer is connected with high-strength steel bar with roof system steel truss, first to the off-load of hanging floor, again to the off-load of roofing steel truss, now the load transfer of roof system and hanging layer is on concrete column or concrete shear force wall cylindrical shell, the load transfer of hanging floor is on roofing steel truss, and the unloading overall principle is: " compatible deformation, unloading equilibrium ";
2-1-1 hangs layer steel work discharging method
Hanging layer first must install high-strength steel bar before unloading, and contraction is tightened, and then unload according to the power transmission order of superstructure, two jackscrew are established in each strong point position, adopted " alternately descent method " unloading, dismantled temporary support after off-load;
2-2 hangs floor board concrete structure and builds the determination of order and the concreting of roof system
2-2-1 hangs floor board concrete structure and builds order and determine and the concreting of roof system
Pouring order of concrete has two kinds of modes
Different building is sequentially also different to the deformation effect of hanging floor board concrete structure, and pouring order of concrete has two kinds of modes: build order 1: roof system, hanging layer concrete intert builds,
Build order 2: first build roof system concrete and build hanging floor board concrete again;
Wherein build order 2 more reasonable, namely first build roof system concrete and build hanging floor board concrete again;
2-3 subregion concreting
First build roof system concrete and build hanging floor board concrete again, roof system steel truss periphery is the state of encorbelmenting, rigidity is poor, hanging layer concrete can have an impact to it when building, therefore hang floor board concrete and first build middle part, the peripheral position of after-pouring, reduce the impact on roof system steel truss cantilever part, analog computation is carried out according to monitored data, select distortion minimum, the most uniform concrete horizontal of distortion builds order, determine the region of first after-pouring, for preventing producing unfavorable deformation effect to roof system steel truss surrounding part of encorbelmenting, first build hanging storey floors zone line concrete, after-pouring encorbelment formed outer peripheral areas concrete,
2-4 is according to hanging floor levels regulating error rod iron
The high-strength steel bar connecting hanging floor has the function of adjustable in length, according to monitoring result after off-load and floor concrete casting, regulates high-strength steel bar length, ensure floor levels absolute altitude sustained height by rod iron adjustment place.
Accompanying drawing explanation
Fig. 1 is that the present invention hangs a layer construction method schematic flow sheet;
Fig. 2 is hanging Rotating fields schematic diagram;
Fig. 3 sets up the view of installing temporary support;
Fig. 4 sets up the view of installing hanging layer girder steel;
Fig. 5 sets up the view of installing roof system steel truss;
Fig. 6 installs high-strength steel bar schematic diagram between roof system steel truss and hanging floor girder steel;
Fig. 7 is rooftop air conditioning unit and hanging layer steel work off-load after-pouring roof system and hangs floor board concrete schematic diagram;
Fig. 8 is positioned at the schematic diagram that rod iron is provided with rod iron adjustment place.
In Fig. 2: 1 steel structure truss; 3 hanging layer girder steel; 5 hanging layer concrete floors; 8 profiled sheets.
In Fig. 3: 2 temporary supports; 6 crawler cranes.
In Fig. 4: 2 temporary supports; 3 hanging layer girder steel; 3 hanging layer girder steel; 6 crawler cranes.
In Fig. 5: 1 steel structure truss; 2 temporary supports; 6 crawler cranes.
In Fig. 6: 1 steel structure truss; 3 hanging layer girder steel; 4 rod irons.
In Fig. 7: 1 steel structure truss; 3 hanging layer girder steel; 4 rod irons; 5 hanging layer concrete floors; 8 profiled sheets.
In Fig. 8: 4 rod irons; 7 rod iron adjustments place; 8 profiled sheets.
Detailed description of the invention
In order to make those skilled in the art understand technical scheme of the present invention better, below in conjunction with accompanying drawing and most preferred embodiment, the present invention is described in further detail.
Embodiment
A kind of large steel space truss hanging layer construction method, its erection sequence is erection sequence from bottom to top, described steel work hanging layer, its structure as shown in Figure 2, by hanging layer girder steel 3, concrete floor 5 above the hanging profiled sheet 8 of layer girder steel 3 top and profiled sheet 8 is formed, length-adjustable hanging high-strength steel bar 4 is provided with between roof truss 1 and hanging girder steel 3, hanging high-strength steel bar 4 hangs and is located at roof system steel truss 1 bottom, hanging high-strength steel bar, for H profile steel, material is Q345B, described erection sequence from bottom to top, for adopting 1) first support hang afterwards and 2) erection sequence from bottom to top of first off-load after-pouring floorslab concrete, its technological process as shown in Figure 1, described 1) first support hang afterwards and 2) operation of the technological process of first off-load after-pouring roof system and hanging floor board concrete is respectively:
1) first support and hang afterwards, technique of its construction comprises following operation:
1-0 has first constructed and has supported the concrete structure of integral roof, comprises concrete column or concrete shear force wall cylindrical shell,
1-1 hangs the installation of layer and roof system steel truss temporary support,
1-2 hangs floor steel beam lifting and connection,
The lifting of 1-3 roof system steel truss and connection,
1-4 high-strength steel bar installs location;
2) first off-load after-pouring roof system and hanging floor board concrete, the technique of its construction comprises following operation:
The off-load of 2-1 rooftop air conditioning unit,
2-2 hangs the off-load of layer steel work,
The concreting of 2-3 roof system,
2-4 hangs floor plate subregion concreting
2-5 is according to hanging floor levels regulating error rod iron;
Described 1), first support hang afterwards and 2) operation of the technological process of first off-load after-pouring roof system and hanging floor board concrete, concrete operations are as follows respectively:
1), first support and hang afterwards
1-0 has first constructed and has supported the concrete structure of integral roof, comprises concrete column or concrete shear force wall cylindrical shell,
1-1 hangs the installation of layer and roof system steel truss temporary support
Temporary support 2, for the temporary support 2 adopting produce in factory to become the form of standard knot, be transported to onsite application, the temporary support 2 that scene is set up is that the lifting fragment bit adopting crawler crane 6 temporary support 2 to be placed in the segmental hoisting construction of hanging layer girder steel 3 and roof system steel truss 1 is set up, as shown in Figure 3;
1-2 hangs floor steel beam lifting and connection
Adopt crawler crane 6 that hanging floor girder steel 3 segmental hoisting is carried out installation at high altitude, temporary fixed connection on temporary support 2, as shown in Figure 4;
The lifting of 1-3 roof system steel truss and connection
Roof system steel truss 1 segmental hoisting on temporary support 2 top, is carried out temporary fixed connection by employing crawler crane 6, then accurately in place, welding is linked to be integral roof, as shown in Figure 5, make the load transfer of roof system on the concrete column supporting roof system or tube shear wall, this is " first supporting ";
1-4 high-strength steel bar installs location
After roof system steel truss 1 installation, high-strength steel bar 4 between roof system steel truss 1 and hanging floor girder steel 3 is installed again, as shown in Figure 6, hanging floor girder steel 3 is connected with the prefabricated accessory of roof system steel truss 1 node by high-strength bolt by described high-strength steel bar 4, hanging floor girder steel 3 is hung in roof system steel truss 1 time, and this is " hanging afterwards ";
2, first off-load after-pouring roof system and hanging floor board concrete
The off-load of 2-1 rooftop air conditioning unit and hanging layer steel work off-load construction
Building roof system and hanging floor board concrete after rooftop air conditioning unit off-load and after the off-load of hanging layer steel work, as shown in Figure 7;
Unloading principle
After hanging layer is connected with high-strength steel bar 4 with roof system steel truss 1, first to the off-load of hanging floor, again to roofing steel truss 1 off-load, now the load transfer of roof system and hanging layer is on concrete column or concrete shear force wall cylindrical shell, the load transfer of hanging floor is on roofing steel truss 1, and the unloading overall principle is: " compatible deformation, unloading equilibrium ";
2-1-1 hangs layer steel work discharging method
Hanging layer must first install high-strength steel bar 4 before unloading, and contraction is tightened, and then unload according to the power transmission order of superstructure, two jackscrew are established in each strong point position, adopted " alternately descent method " unloading, dismantled temporary support 2 after off-load;
2-2 hangs floor board concrete structure and builds the determination of order and the concreting of roof system
2-2-1 hangs floor board concrete structure and builds order and determine and the concreting of roof system
Pouring order of concrete has two kinds of modes
Different building is sequentially also different to the deformation effect of hanging floor board concrete structure, and pouring order of concrete has two kinds of modes: build order 1: roof system, hanging floor board concrete intert builds,
Build order 2: first build roof system concrete and build hanging floor board concrete again;
Wherein build order 2 more reasonable, namely first build roof system concrete and build hanging floor board concrete again;
2-3 subregion concreting
First build roof system concrete and build hanging floor board concrete again, roof system steel truss 1 periphery is the state of encorbelmenting, rigidity is poor, can have an impact to it during hanging floor plate 5 concreting, therefore hang floor plate 5 concrete and first build middle part, the peripheral position of after-pouring, reduce the impact on roof system steel truss 1 cantilever part, analog computation is carried out according to monitored data, select distortion minimum, the most uniform concrete horizontal of distortion builds order, determine the region of first after-pouring, for preventing producing unfavorable deformation effect to roof system steel truss 1 surrounding part of encorbelmenting, first build hanging storey floors 5 zone line concrete, after-pouring encorbelment formed outer peripheral areas concrete,
2-4 is according to hanging floor levels regulating error rod iron
The high-strength steel bar 4 connecting hanging floor has the function of adjustable in length, according to monitoring result after off-load and the concreting of hanging storey floors 5, regulates high-strength steel bar 4 length, ensure floor levels absolute altitude sustained height by rod iron adjustment place 7.
In the present invention, because profiled sheet 8 and concrete not yet form compound action in work progress, need the generation taking the rough sledding such as rational measure prevents profiled sheet 8 amount of deflection excessive, avoid work progress medium-pressure type steel plate 8 directly to bear larger point load; Foreign material and the dust on die mould steel 8 surface should be cleared up, to ensure the good combination between profiled sheet 8 and concrete before building; Carry out the fixation of profiled sheet before construction, prevent profiled sheet 8 from being started by wind.
Adopt of the present invention by lower from upper erection sequence construction method, the construction making the large steel space truss of Tianjin grand theater engineering hang layer is able to successfully construction and installation, thus solve the problem that conventional erection sequence from top to bottom cannot carry out the construction of large steel space truss hanging layer, solve a difficult problem for hanging layer Floor Slab Deformation and easy cracking.The inventive method is applicable to the installation of the multi-storey steel structure hanging layer arranged under steel worm-gearing.
The above is only the preferred embodiment of the present invention; it should be pointed out that for those skilled in the art, under the premise without departing from the principles of the invention; can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.

Claims (2)

1. a large steel space truss hanging layer construction method, its erection sequence routine is erection sequence from top to bottom, it is characterized in that: its erection sequence is erection sequence from bottom to top, described steel work hanging layer, its structure is by hanging a layer girder steel (3), hanging layer concrete floor (5) formation above the hanging profiled sheet (8) of layer girder steel (3) top and profiled sheet (8), length-adjustable hanging high-strength steel bar (4) is provided with between roof truss (1) and hanging girder steel, hang and be located at roof system steel truss (1) bottom hanging rod iron (4), for H profile steel, material is Q345B, described erection sequence from bottom to top, for adopting 1) first support hang afterwards and 2) erection sequence from bottom to top of first off-load after-pouring roof system and hanging floor board concrete, described 1) first support hang afterwards and 2) operation of the technological process of first off-load after-pouring roof system and hanging floor board concrete is respectively:
1) first support and hang afterwards, technique of its construction comprises following operation:
1-0 has first constructed and has supported the concrete structure of integral roof, comprises concrete column or concrete shear force wall cylindrical shell,
2) technique of its construction comprises following operation:
The off-load of 2-1 rooftop air conditioning unit,
2-2 hangs the off-load of layer steel work,
The concreting of 2-3 roof system,
2-4 hangs floor plate subregion concreting
2-5 is according to hanging floor levels regulating error rod iron;
Described 1), first support hang afterwards and 2) operation of the technological process of first off-load after-pouring floorslab concrete, concrete operations are as follows respectively:
1) first support and hang afterwards
1-0 has first constructed and has supported the concrete structure of integral roof, comprises concrete column or concrete shear force wall cylindrical shell,
1-1 hangs the installation of layer and roof system steel truss temporary support
Temporary support (2), for the temporary support (2) adopting produce in factory to become the form of standard knot, be transported to onsite application, the temporary support that scene is set up is that the lifting fragment bit adopting crawler crane (6) temporary support (2) to be placed in the segmental hoisting construction of hanging layer girder steel (3) and roof system steel truss (1) is set up;
1-2 hangs floor steel beam lifting and connection
Adopt crawler crane (6) that floor girder steel (3) segmental hoisting will be hung go up at temporary support (2) and carry out installation at high altitude, temporary fixed connection;
The lifting of 1-3 roof system steel truss and connection
Adopt crawler crane (6) by roof system steel truss (1) segmental hoisting on temporary support (2) top, carry out temporary fixed connection, then accurately in place, welding is linked to be integral roof, make the load transfer of roof system on the concrete column supporting roof system or tube shear wall, this is " first supporting ";
1-4 high-strength steel bar installs location
After roof system steel truss (1) installation, high-strength steel bar (4) between roof system steel truss (1) and hanging floor girder steel (3) is installed again, described high-strength steel bar (4) will be hung floor girder steel (3) by high-strength bolt and be connected with the prefabricated accessory of roof system steel truss (1) node, to hang under floor girder steel (3) is hung in roof system steel truss (1), this is " hanging afterwards ";
2. first off-load after-pouring roof system and hanging floor board concrete
The off-load of 2-1 rooftop air conditioning unit and hanging layer steel work off-load construction
Unloading principle
After hanging layer is connected with high-strength steel bar (4) with roof system steel truss (1), first to the off-load of hanging floor, again to roofing steel truss (1) off-load, now the load transfer of roof system and hanging layer is on concrete column or concrete shear force wall cylindrical shell, the load transfer of hanging floor is on roofing steel truss (1), and the unloading overall principle is: " compatible deformation, unloading equilibrium ";
2-1-1 hangs layer steel work discharging method
Hanging layer first must install high-strength steel bar (4) before unloading, and contraction is tightened, then unload according to the power transmission order of superstructure, two jackscrew are established in each strong point position, adopt " alternately descent method " unloading, after off-load, dismantle temporary support (2);
2-2 hangs floor board concrete structure and builds the determination of order and the concreting of roof system
2-2-1 hangs floor board concrete structure and builds order and determine and the concreting of roof system
Pouring order of concrete has two kinds of modes
Different building is sequentially also different to the deformation effect of hanging floor plate (5) concrete structure, and pouring order of concrete has two kinds of modes:
Build order 1: roof system, hanging floor board concrete intert builds,
Build order 2: first build roof system concrete and build hanging floor board concrete again;
Wherein build order 2 more reasonable, namely first build roof system concrete and build hanging floor plate (5) concrete again;
2-3 subregion concreting
First build roof system concrete and build hanging floor plate (5) concrete again, roof system steel truss (1) periphery is the state of encorbelmenting, rigidity is poor, hanging layer concrete can have an impact to it when building, therefore hang floor plate (5) concrete and first build middle part, the peripheral position of after-pouring, reduce the impact on roof system steel truss (1) cantilever part, analog computation is carried out according to monitored data, select distortion minimum, the most uniform concrete horizontal of distortion builds order, determine the region of first after-pouring, for preventing producing unfavorable deformation effect to roof system steel truss (1) surrounding part of encorbelmenting, first build hanging storey floors (5) zone line concrete, after-pouring encorbelment formed outer peripheral areas concrete,
2-4 is according to hanging floor levels regulating error rod iron
The high-strength steel bar (4) connecting hanging floor has the function of adjustable in length, according to monitoring result after off-load and hanging floor plate (5) concreting, regulate high-strength steel bar (4) length by rod iron adjustment place (7), ensure floor levels absolute altitude sustained height.
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