CN219887196U - Irregular atrium hole assembled quick temporary plugging structure - Google Patents
Irregular atrium hole assembled quick temporary plugging structure Download PDFInfo
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- CN219887196U CN219887196U CN202321675966.6U CN202321675966U CN219887196U CN 219887196 U CN219887196 U CN 219887196U CN 202321675966 U CN202321675966 U CN 202321675966U CN 219887196 U CN219887196 U CN 219887196U
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- 230000001788 irregular Effects 0.000 title claims abstract description 30
- 210000002837 heart atrium Anatomy 0.000 title claims abstract description 22
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 283
- 239000010959 steel Substances 0.000 claims abstract description 283
- 239000011150 reinforced concrete Substances 0.000 claims abstract description 56
- 239000004567 concrete Substances 0.000 claims abstract description 55
- 238000011065 in-situ storage Methods 0.000 claims description 25
- 238000005034 decoration Methods 0.000 claims description 8
- 238000010276 construction Methods 0.000 abstract description 41
- 230000009286 beneficial effect Effects 0.000 abstract description 4
- 238000004904 shortening Methods 0.000 abstract description 3
- 238000000034 method Methods 0.000 description 12
- 238000009434 installation Methods 0.000 description 8
- 239000003973 paint Substances 0.000 description 7
- 238000003466 welding Methods 0.000 description 7
- 239000000463 material Substances 0.000 description 5
- 229910001294 Reinforcing steel Inorganic materials 0.000 description 4
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 3
- 238000004873 anchoring Methods 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Abstract
The utility model discloses an irregular atrium hole assembled rapid temporary plugging structure, which comprises a hole side steel concrete girder, wherein a prefabricated variable-section steel girder for plugging is arranged on the hole side steel concrete girder, a plugging space is divided into an edge span and a middle span by the prefabricated variable-section steel girder, prefabricated steel secondary girders for plugging are arranged in the edge span and the middle span, and two ends of the prefabricated steel secondary girders in the edge span are respectively connected with the hole side reinforced concrete girder and the prefabricated variable-section steel girder. The utility model solves the problems of difficult construction, long construction period and poor safety of quickly performing temporary plugging of the large-span holes in the limited space of the underground structure. The steel skeleton light plate can be prefabricated in a factory, paved on site, and flexible in modulus selection, can meet the construction requirements of modularization and rapidness of an underground structure, and is beneficial to shortening the construction period and reducing the construction cost.
Description
Technical Field
The utility model belongs to the field of underground building structures, and particularly relates to an irregular atrium hole assembly type rapid temporary plugging structure.
Background
With the continuous development of urban rail transit engineering and underground space engineering construction, the urban development center is gradually changed from the ground to the underground, and the difficulties encountered in the construction process of the underground structure construction are more and more, compared with the ground engineering, the mechanical, equipment, materials and dregs transportation limiting factors of the underground structure construction are more, the stress is more complex, and the construction difficulty is more.
In the construction process of the underground structure, the main structure construction is generally carried out firstly, then construction such as section tunnels, internal secondary structures, pipelines, equipment installation and the like is carried out, temporary holes are reserved in all laminates from top to bottom in the construction process of the underground structure, or the temporary holes are permanently plugged after the final construction is finished by using stairs and atrium holes as lifting channels. However, due to construction period arrangement or other reasons, the space above the hole is sometimes required to meet traffic or building functions, and the reserved hole can only be temporarily plugged, and the construction and installation of subsequent engineering can be performed after the temporary plugging structure is removed at a later stage.
Usually, the small-size hole of reserving to the underground structure floor can adopt prefabricated reinforced concrete apron or steel sheet to carry out temporary shutoff, but the span that needs shutoff hole is bigger, and the concrete apron or steel sheet that use is also thicker, and the dead weight is great, and installation and later stage demolishment construction are loaded down with trivial details, generally need set up scaffold frame to medium plate from the bottom plate, and high and waste material transportation is inconvenient, and the time limit for a project is longer, and the cost is higher. Temporary plugging for large-span irregular atrium holes with the span exceeding 20m is not a mature construction method, so that an assembled rapid temporary plugging structure for the large-span irregular atrium holes of an underground structure needs to be designed to solve the problems.
Disclosure of Invention
The utility model provides an irregular atrium hole assembly type rapid temporary plugging structure for solving the problems existing in the prior art.
The technical scheme of the utility model is as follows: the utility model provides an irregular atrium hole assembled quick temporary plugging structure, includes hole limit shaped steel concrete longeron, hole limit reinforced concrete girder, be provided with the prefabricated variable cross section shaped steel girder that the shutoff was used on the hole limit shaped steel concrete longeron, prefabricated variable cross section shaped steel girder separates the shutoff space into side span and midspan, all be provided with the prefabricated shaped steel secondary beam that the shutoff was used in side span, the both ends of the prefabricated shaped steel secondary beam in the side span link to each other with hole limit reinforced concrete girder, prefabricated variable cross section shaped steel girder respectively, and the both ends of the prefabricated shaped steel secondary beam in the midspan link to each other with the prefabricated variable cross section shaped steel girder that parallels.
Furthermore, hole side beam embedded steel plates are arranged on the hole side beam reinforced concrete longitudinal beams at intervals, and a support at the lower end of the end part of the prefabricated variable-section steel main beam is connected with the hole side beam embedded steel plates.
Further, a secondary beam concrete cushion block is arranged on the hole edge reinforced concrete cross beam, an embedded steel plate is arranged at the upper end of the secondary beam concrete cushion block, and a support at the lower end of the end part of the prefabricated steel secondary beam is connected with the embedded steel plate of the secondary beam concrete cushion block.
Furthermore, the hole edge type steel concrete longitudinal beam and the hole edge reinforced concrete cross beam are provided with continuous cast-in-situ reinforced concrete vertical walls.
Furthermore, the cast-in-situ reinforced concrete vertical wall top, the upper surface of the prefabricated variable-section steel girder and the upper surface of the prefabricated steel secondary girder are flush.
Furthermore, the cast-in-situ reinforced concrete vertical wall, the prefabricated variable-section steel girder and the prefabricated steel secondary girder are provided with steel skeleton light precast slabs for plugging, and the upper ends of the steel skeleton light precast slabs are provided with decoration layers.
Furthermore, a girder stiffening rib plate is arranged in the prefabricated variable-section steel girder, and the girder stiffening rib plate provides a connection foundation for connection of the prefabricated steel secondary girders.
Furthermore, the side wall of the end part of the prefabricated steel secondary beam is provided with two parallel connecting plates, and the main beam stiffening rib plates are clamped between the connecting plates through connecting bolts.
Furthermore, the cast-in-situ reinforced concrete vertical wall is enclosed with the prefabricated variable-section steel girder, the prefabricated steel secondary girder and the structural column to form an irregular area, a special-shaped steel plate is arranged in the irregular area, and the special-shaped steel plate is flush with the upper end of the steel skeleton light precast slab.
The beneficial effects of the utility model are as follows:
according to the utility model, the mounting platform is provided for paving the steel skeleton light precast slabs and the special-shaped steel slabs through the orthogonally arranged prefabricated variable-section steel girders and prefabricated steel secondary girders, so that the temporary plugging requirements of various large-span irregular atrium holes, especially the large-span irregular holes of over 20m, can be met, and the problems of difficult construction, long construction period and poor safety of quickly performing the temporary plugging of the large-span holes in the limited space of the underground structure are solved.
According to the utility model, the prefabricated variable-section steel main beam and the prefabricated steel secondary beam are prefabricated, so that the field welding difficulty is reduced, the influence of construction errors and installation accuracy on structural stress is reduced, the production efficiency is improved, the steel main beam adopts variable sections according to the stress, the bearing safety is met, the self weight of the structure is reduced, the convenience of early installation and later dismantling construction is improved, and the investment is effectively saved.
The steel skeleton light plate can be prefabricated in a factory, paved on site, and flexible in modulus selection, can meet the construction requirements of modularization and rapidness of an underground structure, and is beneficial to shortening the construction period and reducing the construction cost.
Drawings
FIG. 1 is a schematic plan view of a middle prefabricated variable section steel main beam and a prefabricated steel secondary beam of the present utility model;
FIG. 2 is a cross-sectional view taken along section A-A of FIG. 1;
FIG. 3 is a cross-sectional view taken along section B-B in FIG. 1;
FIG. 4 is a schematic view of a portion of a connection of a main beam of a middle prefabricated variable section steel and a secondary beam of a prefabricated section steel according to the present utility model;
FIG. 5 is a schematic diagram showing the connection of profiled steel sheets at the edges of a structural column in the present utility model;
FIG. 6 is a schematic structural view of a pre-buried steel plate on a secondary beam concrete pad in the utility model;
wherein:
1. prefabricated section steel secondary beam of prefabricated section steel girder 2
3. 4 hole side longerons pre-buried steel sheet of hole side steel concrete longeron
5. 6 times beam concrete cushion blocks of hole edge reinforced concrete cross beam
7. Cast-in-situ reinforced concrete vertical wall with pre-embedded steel plates 8 on secondary beam concrete cushion blocks
9. Reserved steel bar on 10-hole side beam of embedded through long steel plate
11. Steel skeleton light precast slab 12 decoration layer
13. Connecting bolt for girder stiffening rib plate 14
15. Connecting plate 16 steel plate anchor bar
17. Special-shaped steel plate 18 anchor bolt
19. Angle steel 20 stiffening rib
21. And (5) a structural column.
Detailed Description
The present utility model will be described in detail below with reference to the drawings and examples:
as shown in fig. 1 to 6, the irregular atrium hole assembled rapid temporary plugging structure comprises a hole side steel concrete longitudinal beam 3 and a hole side reinforced concrete beam 5, wherein a prefabricated variable cross section steel girder 1 for plugging is arranged on the hole side steel concrete longitudinal beam 3, a plugging space is divided into a side span and a middle span by the prefabricated variable cross section steel girder 1, prefabricated steel secondary beams 2 for plugging are arranged in the side span and the middle span, two ends of the prefabricated steel secondary beams 2 in the side span are respectively connected with the hole side reinforced concrete beam 5 and the prefabricated variable cross section steel girder 1, and two ends of the prefabricated steel secondary beams 2 in the middle span are connected with the parallel prefabricated variable cross section steel girders 1.
Hole side beam embedded steel plates 4 are arranged on the hole side beam steel concrete longitudinal beam 3 at intervals, and a support at the lower end of the end part of the prefabricated variable-section steel main beam 1 is connected with the hole side beam embedded steel plates 4.
The support is characterized in that a secondary beam concrete cushion block 6 is arranged on the hole edge reinforced concrete cross beam 5, a pre-buried steel plate 7 is arranged on the secondary beam concrete cushion block at the upper end of the secondary beam concrete cushion block 6, and a support seat at the lower end of the end part of the prefabricated steel secondary beam 2 is connected with the pre-buried steel plate 7 on the secondary beam concrete cushion block.
The hole edge type steel reinforced concrete longitudinal beam 3 and the hole edge reinforced concrete transverse beam 5 are provided with continuous cast-in-situ reinforced concrete vertical walls 8.
The top of the cast-in-situ reinforced concrete vertical wall 8 is flush with the upper surface of the prefabricated variable-section steel girder 1 and the upper surface of the prefabricated steel secondary girder 2.
The cast-in-situ reinforced concrete vertical wall 8, the prefabricated variable-section steel girder 1 and the prefabricated steel secondary girder 2 are provided with steel skeleton light precast slabs 11 for plugging, and the upper ends of the steel skeleton light precast slabs 11 are provided with decoration layers 12.
The prefabricated variable cross section steel girder 1 is internally provided with girder stiffening rib plates 13, and the girder stiffening rib plates 13 provide a connection foundation for the connection of the prefabricated steel secondary girders 2.
The side wall of the end part of the prefabricated steel secondary beam 2 is provided with two connecting plates 15, the connecting plates 15 are parallel, and the main beam stiffening rib plates 13 are clamped between the connecting plates 15 through connecting bolts 14.
The cast-in-situ reinforced concrete vertical wall 8 is enclosed with the prefabricated variable-section steel girder 1, the prefabricated steel secondary girder 2 and the structural columns 21 to form an irregular area, a special-shaped steel plate 17 is arranged in the irregular area, and the special-shaped steel plate 17 is flush with the upper end of the steel skeleton light precast slab 11.
Specifically, through holes are correspondingly formed in the connecting plate 15 and the girder stiffening rib plates 13, and connection and fixation are realized through the connecting bolts 14.
Specifically, the prefabricated variable cross section steel main beam 1 and the prefabricated steel secondary beam 2 are enclosed to form a plurality of rectangular units.
Specifically, the prefabricated variable-section steel girder 1 comprises an upper flange, a lower flange and a variable-height web plate, wherein a girder stiffening rib plate 13 is arranged between the upper flange and the lower flange, and the girder stiffening rib plate 13 is perpendicular to the variable-height web plate.
Meanwhile, the main beam stiffening rib plates 13 are also used as a connection foundation with the prefabricated steel secondary beams 2.
And flat parts are formed at two ends of the prefabricated variable-section steel girder 1 and are used for being connected with a hole side longitudinal beam embedded steel plate 4 on the hole side steel reinforced concrete longitudinal beam 3.
Specifically, a steel plate anchor bar 16 is reserved on the hole edge type steel concrete longitudinal beam 3, and the steel plate anchor bar 16 is connected with the hole edge longitudinal beam embedded steel plate 4.
Specifically, the prefabricated steel secondary beam 2 is an i-beam, connecting plates 15 are arranged on two sides of a web plate of the prefabricated steel secondary beam 2, and the thickness of the main beam stiffening rib plate 13 is not greater than the interval between the two connecting plates 15, so that the main beam stiffening rib plate 13 can be inserted between the two connecting plates 15.
Specifically, hole limit reinforced concrete crossbeam 5 upper end is provided with protruding secondary beam concrete pad 6, secondary beam concrete pad 6 upper end is provided with pre-buried steel sheet 7 on the secondary beam concrete pad, and the bottom plate of prefabricated steel secondary beam 2 links to each other with pre-buried steel sheet 7 on the secondary beam concrete pad.
Specifically, a steel plate anchor bar 16 is reserved on the hole edge reinforced concrete beam 5, and the steel plate anchor bar 16 penetrates through the secondary beam concrete cushion block 6 and is connected with the lower end of the embedded steel plate 7 on the secondary beam concrete cushion block.
Specifically, the upper end of the cast-in-situ reinforced concrete vertical wall 8 is provided with a pre-buried through long steel plate 9, and the embedded through long steel plate 9 is connected with a steel skeleton light precast slab 11.
The hole edge steel reinforced concrete longitudinal beam 3 and the hole edge reinforced concrete transverse beam 5 are also provided with reserved steel bars 10 on the hole edge beam, and the reserved steel bars 10 on the hole edge beam enter the cast-in-situ reinforced concrete vertical wall 8.
Specifically, the special-shaped steel plate 17 fills the area which is not enclosed among the structural column 21, the prefabricated variable-section steel main beam 1 and the prefabricated steel secondary beam 2.
An anchor bolt 18 is arranged in the structural column 21, one end of the anchor bolt 18 extends out of the outer surface of the structural column, an extending section of the anchor bolt 18 is fixed on a diagonal steel 19, a stiffening rib 20 is arranged in the angle steel 19, the upper end of the angle steel 19 is connected with a special-shaped steel plate 17, and the lower end of the special-shaped steel plate 17 is further provided with a supporting foot which is fixed on the prefabricated variable-section steel main beam 1 and the prefabricated steel secondary beam 2.
Specifically, the pre-buried steel plates 4 of the hole side longitudinal beam are arranged on the reserved hole side steel concrete longitudinal beam 3 according to a certain interval, and the prefabricated variable cross section steel main beam 1 is formed by respectively welding two supports above the pre-buried steel plates 4 of the hole side longitudinal beam and crossing the holes to be plugged to form the prefabricated variable cross section steel main beam 1 crossing at intervals.
Specifically, the secondary beam concrete cushion blocks 6 and the pre-buried steel plates 7 on the secondary beam concrete cushion blocks are arranged on the reinforced concrete cross beam 5 at the edges of the reserved holes at certain intervals.
And one end of the side span of the prefabricated steel secondary beam 2 is welded above the side span according to the position of the pre-buried steel plate 7 on the secondary beam concrete cushion block, the other end of the side span is connected with the prefabricated variable cross section steel girder 1, and the two ends of the middle span are respectively connected with the prefabricated variable cross section steel girder 1.
The structural columns 21 are reserved with the anchor bolts 18 at a certain interval on the hole facing side, and angle steel 19 and stiffening ribs 20 are arranged at the anchor bolts 18.
Specifically, the cast-in-situ reinforced concrete vertical wall 8 is tightly clung to the embedded steel plate 4 of the hole side longitudinal beam and the concrete cushion block 6 of the secondary beam, and is arranged around the hole to be plugged, the height of the cast-in-situ reinforced concrete vertical wall 8 is equal to the height of the support of the prefabricated variable-section steel girder 1, the reserved steel bar 10 on the hole side girder extends into the cast-in-situ reinforced concrete vertical wall 8, and the through length steel plate 9 is embedded on the hole side girder.
Specifically, the steel skeleton light precast slab 11 is tiled on a square grid formed by enclosing a prefabricated variable-section steel girder, a prefabricated steel secondary beam 2 and a cast-in-situ reinforced concrete vertical wall 8.
Correspondingly, the prefabricated special-shaped steel plates 17 are tiled on irregular areas formed by encircling the structural columns 21, the prefabricated variable-section steel main beams 1, the prefabricated steel secondary beams 2 and the cast-in-situ reinforced concrete vertical walls 8, and the angle steel 19 is positioned below the prefabricated special-shaped steel plates 17.
Specifically, the decoration layer 12 is arranged on the upper surfaces of the steel skeleton light precast slab 11 and the precast special-shaped steel plate 17, and the integral vertical self-vibration frequency of the plugging structure is not less than 3Hz.
Specifically, the hole side longitudinal beam embedded steel plates 4 and the prefabricated variable-section steel girder 1 are uniformly arranged at intervals along the reserved hole side steel concrete longitudinal beam 3, the distance is 3-4 m, namely, any two prefabricated variable-section steel girders 1 are arranged in parallel, and the supports at the two ends are respectively welded and fixed with the hole side longitudinal beam embedded steel plates 4 at the two sides.
The girder stiffening rib plates 13 are uniformly welded and fixed on two sides of a web plate of the prefabricated variable-section steel girder 1 at intervals of 1-1.5 m.
Specifically, the precast steel secondary beam 2, the secondary beam concrete cushion 6 and the pre-buried steel plates 7 on the secondary beam concrete cushion are uniformly arranged at intervals along the reinforced concrete cross beam 5 at the hole edge, the maximum distance between any two precast steel secondary beams 2 is 3m, or the length of the standard block of the steel skeleton light precast slab 11 is not more than that of the standard block, one end of the side span of the precast steel secondary beam 2 is welded and fixed with the pre-buried steel plates 7 on the secondary beam concrete cushion, the other end of the side span of the precast steel secondary beam 2 is connected and fixed with the main beam stiffening rib plates 13 through connecting bolts 14 and connecting plates 15, and the middle span two ends of the precast steel secondary beam 2 are connected and fixed with the main beam stiffening rib plates 13 through the connecting bolts 14 and the connecting plates 15.
Specifically, the thickness of the prefabricated special-shaped steel plate 17 is 10-20 mm, and the material model and the thickness are determined according to the span and the upper load calculation; the anchor bolt 18 is a high-strength bolt, and the material model and the diameter are determined according to stress calculation.
Specifically, the cast-in-situ reinforced concrete vertical wall 8 surrounds the hole to be plugged, the cross section is rectangular, the width is 0.2-0.3 m, the height is equal to the height of the support of the prefabricated variable-section steel girder 1, and the diameter of the reserved steel bar 10 on the hole edge beam is calculated and determined according to the stress of the cast-in-situ reinforced concrete vertical wall 8; the thickness of the embedded through long steel plate 9 is 10-20 mm, and the embedded through long steel plate and the steel plate anchor bars 16 are subjected to perforation plug welding, and the thickness of the steel plate, the diameter of the steel plate anchor bars 16 and the anchoring length are determined according to the stress calculation of the embedded part.
Specifically, the standard block size of the steel skeleton light precast slab 11 is 1.0m multiplied by 2.5/3.0m.
Specifically, the surfaces of the steel components such as the prefabricated variable-section steel girder 1, the prefabricated steel secondary girder 2, the girder stiffening rib plates 13, the connecting plates 15, the prefabricated special-shaped steel plates 17, the angle steels 19, the stiffening ribs 20 and the like are inspected and coated with an anti-rust coating before construction, all the steel components are steel with the original rust grade of A on the surface before rust removal, and the corrosion resistance requirement of the steel components meets the requirement of industrial building corrosion protection design Specification (GB 50046); after the installation is completed, fireproof paint is sprayed on the surfaces of all steel structures, the thickness is not less than 20mm, the fireproof paint and the anticorrosive paint pass through a compatibility test, compatibility and matching are guaranteed, measures are taken in the construction of the fireproof paint to ensure the bonding strength with the anticorrosive paint, the bonding strength of the fireproof paint and the anticorrosive paint is greater than 0.05MPa, the fireproof grade of the plugging structure is one-level, and the fireproof limit is not less than 3 hours.
Specifically, the prefabricated variable-section steel main beam 1 adopts an I-shaped section, the width of a support is the same as that of a span, the section height of the support is small, the height of the span section is large, and the material model and the section size are determined according to the calculation of the beam span and the upper load.
Specifically, the main beam stiffening rib plates 13 are rectangular, and the material model and the section size are determined according to stress calculation; the thickness of the embedded steel plate 4 of the hole side longitudinal beam is 10-20 mm, through-hole plug welding is adopted between the embedded steel plate and the steel plate anchor rib 16, and the thickness of the steel plate, the diameter of the steel plate anchor rib 16 and the anchoring length are determined according to the stress calculation of the embedded part.
A construction method of an irregular atrium hole assembly type rapid temporary plugging structure comprises the following steps:
A. reserving reinforcing steel bars at the hole edges when constructing the underground main body structure;
B. reserving a steel plate at the hole edge when constructing the underground main body structure;
C. steel plate anchor bars are reserved on the side surfaces when the structural column is constructed;
D. processing the prefabricated steel structure in a factory;
E. hoisting a prefabricated section-variable steel main beam;
F. installing a prefabricated steel secondary beam;
G. constructing a cast-in-situ reinforced concrete vertical wall;
H. installing a steel skeleton light precast slab and a special-shaped steel plate;
I. and constructing the decoration layer at the uppermost layer.
Specifically, the steel bars are reserved at the hole edges when the underground main body structure is constructed in the step A, and the concrete process is as follows:
firstly, reserving reinforcing steel bars 10 on a reserved hole side beam at a position of a hole side steel reinforced concrete longitudinal beam 3 during construction of an underground main body structure;
then, reserving reinforcing steel bars 10 on the reserved hole edge beam at the position of the hole edge reinforced concrete beam 5 during construction of the underground main body structure;
then, when the underground main body structure is constructed, reserving a steel plate anchor bar 16 for installing a hole side girder embedded steel plate 4 at the hole side steel reinforced concrete girder 3;
and finally, reserving and installing a steel plate anchor bar 16 of a pre-buried steel plate 7 on the secondary beam concrete cushion block at the position of the hole edge reinforced concrete cross beam 5 during construction of the underground main body structure.
Specifically, the steel plate is reserved at the hole edge when the underground main body structure is constructed in the step B, and the concrete process is as follows:
and a hole side girder embedded steel plate 4 is reserved at the position of the hole side steel reinforced concrete girder 3.
Specifically, the steel plate anchor bars are reserved at the top when the structural column is constructed in the step C, and the concrete process is as follows:
in constructing the structural column 21, anchors 18 are reserved at the outer wall of the structural column 21.
Specifically, the prefabricated steel structure is processed in a factory in the step D, and the concrete process is as follows:
and (3) processing the prefabricated variable-section steel girder 1, the girder stiffening rib plates 13, the prefabricated steel secondary beam 2, the steel skeleton light precast slab 11 and the prefabricated special-shaped steel plate 17 in a factory, and conveying the processed prefabricated variable-section steel girder 1, the processed girder stiffening rib plates 13, the prefabricated steel secondary beam 2, the processed steel skeleton light precast slab 11 and the processed prefabricated special-shaped steel plate 17 to a construction site.
Specifically, step E hoists prefabricated variable cross section shaped steel girder, and specific process is as follows:
hoisting the prefabricated variable-section steel girder 1 to cross the reserved holes, and respectively welding and fixing the supports at the two ends of the prefabricated variable-section steel girder 1 with the embedded steel plates 4 of the side stringers of the holes at the two sides.
Specifically, the step F is to install the prefabricated steel secondary beam, and the specific process is as follows:
firstly, pouring a secondary beam concrete cushion block 6 on a reinforced concrete beam 5 at the hole edge, and embedding a steel plate 7 on the secondary beam concrete cushion block;
then, one end of the side span of the precast steel secondary beam 2 is welded and fixed with the embedded steel plate 7 on the secondary beam concrete cushion block, and the other end of the side span is connected with the girder stiffening rib plate 13 on the precast variable-section steel girder 1;
and finally, the supports at the two ends of the middle span of the prefabricated steel secondary beam 2 are connected with the girder stiffening rib plates 13 on the prefabricated variable-section steel girder 1.
Specifically, the step G is used for constructing the cast-in-situ reinforced concrete vertical wall, and the concrete process is as follows:
firstly, binding reinforcing steel bars of the cast-in-situ reinforced concrete vertical wall 8 around the holes to be plugged;
then, the reinforced concrete vertical wall 8 is poured with concrete and the through long steel plate 9 is embedded.
Specifically, the step H is to install a steel skeleton light precast slab and a special-shaped steel plate, and the specific process is as follows:
firstly, a steel skeleton light precast slab 11 and a precast special-shaped steel slab 17 are flatly laid and installed;
and then, fixing the steel skeleton light precast slab 11, the prefabricated special-shaped steel plate 17, the embedded through long steel plate 9, the prefabricated variable-section steel girder 1 and the prefabricated steel secondary girder 2 by spot welding.
Specifically, the step I is used for constructing the uppermost decoration layer, and the specific process is as follows:
and performing construction of the decoration layer 12 on the steel skeleton light precast slab 11 and the precast special-shaped steel slab 17.
According to the utility model, the mounting platform is provided for paving the steel skeleton light precast slabs and the special-shaped steel slabs through the orthogonally arranged prefabricated variable-section steel girders and prefabricated steel secondary girders, so that the temporary plugging requirements of various large-span irregular atrium holes, especially the large-span irregular holes of over 20m, can be met, and the problems of difficult construction, long construction period and poor safety of quickly performing the temporary plugging of the large-span holes in the limited space of the underground structure are solved.
According to the utility model, the prefabricated variable-section steel main beam and the prefabricated steel secondary beam are prefabricated, so that the field welding difficulty is reduced, the influence of construction errors and installation accuracy on structural stress is reduced, the production efficiency is improved, the steel main beam adopts variable sections according to the stress, the bearing safety is met, the self weight of the structure is reduced, the convenience of early installation and later dismantling construction is improved, and the investment is effectively saved.
The steel skeleton light plate can be prefabricated in a factory, paved on site, and flexible in modulus selection, can meet the construction requirements of modularization and rapidness of an underground structure, and is beneficial to shortening the construction period and reducing the construction cost.
Claims (9)
1. The utility model provides an irregular atrium hole assembled quick temporary plugging structure, includes hole limit shaped steel concrete longeron (3), hole limit reinforced concrete crossbeam (5), its characterized in that: the prefabricated variable cross section steel girder (1) for plugging is arranged on the hole edge steel concrete longitudinal beam (3), the plugging space is divided into an edge span and a middle span by the prefabricated variable cross section steel girder (1), the prefabricated steel secondary beams (2) for plugging are arranged in the edge span and the middle span, two ends of the prefabricated steel secondary beams (2) in the edge span are respectively connected with the hole edge reinforced concrete cross beam (5) and the prefabricated variable cross section steel girder (1), and two ends of the prefabricated steel secondary beams (2) in the middle span are connected with the prefabricated variable cross section steel girders (1) which are parallel.
2. The irregular atrium hole fitting type rapid temporary plugging structure according to claim 1, wherein: hole side beam embedded steel plates (4) are arranged on the hole side beam steel concrete longitudinal beams (3) at intervals, and a support at the lower end of the end part of the prefabricated variable-section steel main beam (1) is connected with the hole side beam embedded steel plates (4).
3. The irregular atrium hole fitting type rapid temporary plugging structure according to claim 1, wherein: the concrete slab is characterized in that a secondary beam concrete cushion block (6) is arranged on the hole edge reinforced concrete beam (5), a pre-buried steel plate (7) is arranged on the secondary beam concrete cushion block at the upper end of the secondary beam concrete cushion block, and a support at the lower end of the end part of the prefabricated steel secondary beam (2) is connected with the pre-buried steel plate (7) on the secondary beam concrete cushion block.
4. The irregular atrium hole fitting type rapid temporary plugging structure according to claim 1, wherein: the continuous cast-in-situ reinforced concrete vertical wall (8) is arranged on the hole edge type steel concrete longitudinal beam (3) and the hole edge reinforced concrete cross beam (5).
5. The irregular atrium hole fitting type rapid temporary plugging structure according to claim 4, wherein: the top of the cast-in-situ reinforced concrete vertical wall (8) is flush with the upper surface of the prefabricated variable-section steel main beam (1) and the upper surface of the prefabricated steel secondary beam (2).
6. The irregular atrium hole fitting type rapid temporary plugging structure according to claim 5, wherein: the cast-in-situ reinforced concrete vertical wall (8), the prefabricated variable-section steel girder (1) and the prefabricated steel secondary girder (2) are provided with steel skeleton light precast slabs (11) for plugging, and the upper ends of the steel skeleton light precast slabs (11) are provided with decoration layers (12).
7. The irregular atrium hole fitting type rapid temporary plugging structure according to claim 1, wherein: the prefabricated variable cross section steel girder (1) is internally provided with girder stiffening rib plates (13), and the girder stiffening rib plates (13) provide a connection foundation for the connection of the prefabricated steel secondary girders (2).
8. The irregular atrium hole fitting type rapid temporary plugging structure according to claim 1, wherein: the side wall of the end part of the prefabricated steel secondary beam (2) is provided with two connecting plates (15), the connecting plates (15) are parallel, and the main beam stiffening rib plates (13) are clamped between the connecting plates (15) through connecting bolts (14).
9. The irregular atrium hole fitting type rapid temporary plugging structure according to claim 6, wherein: the cast-in-situ reinforced concrete vertical wall (8) and the prefabricated variable cross section steel girder (1), the prefabricated steel secondary girder (2) and the structural columns (21) are enclosed to form an irregular area, a special-shaped steel plate (17) is arranged in the irregular area, and the special-shaped steel plate (17) is flush with the upper end of the steel skeleton light precast slab (11).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321675966.6U CN219887196U (en) | 2023-06-29 | 2023-06-29 | Irregular atrium hole assembled quick temporary plugging structure |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321675966.6U CN219887196U (en) | 2023-06-29 | 2023-06-29 | Irregular atrium hole assembled quick temporary plugging structure |
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| Publication Number | Publication Date |
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| CN219887196U true CN219887196U (en) | 2023-10-24 |
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| CN202321675966.6U Active CN219887196U (en) | 2023-06-29 | 2023-06-29 | Irregular atrium hole assembled quick temporary plugging structure |
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| Country | Link |
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| CN (1) | CN219887196U (en) |
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