CN111395192A - Support for upper-layer member construction by using lower steel box girder bearing and construction method - Google Patents
Support for upper-layer member construction by using lower steel box girder bearing and construction method Download PDFInfo
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- CN111395192A CN111395192A CN202010330212.1A CN202010330212A CN111395192A CN 111395192 A CN111395192 A CN 111395192A CN 202010330212 A CN202010330212 A CN 202010330212A CN 111395192 A CN111395192 A CN 111395192A
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- 238000009826 distribution Methods 0.000 claims description 29
- 238000003466 welding Methods 0.000 claims description 22
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D21/00—Methods or apparatus specially adapted for erecting or assembling bridges
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D2/00—Bridges characterised by the cross-section of their bearing spanning structure
- E01D2/04—Bridges characterised by the cross-section of their bearing spanning structure of the box-girder type
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D2101/00—Material constitution of bridges
- E01D2101/30—Metal
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Abstract
The application discloses utilize lower part steel box girder to bear support and construction method that carries out upper member construction, this utilize lower part steel box girder to bear support that carries out upper member construction includes: the steel pipe support comprises a support foundation and a first steel pipe support arranged on the support foundation; the first steel pipe bracket is arranged below the lower steel box girder and is used for supporting the lower steel box girder; and the second steel pipe support is arranged on the upper surface of the lower steel box girder, and the upper end of the second steel pipe support is used for supporting the upper-layer member. The problem of steel box girder installing support among the correlation technique have that the construction progress is slow, consume a large amount of supports, construction safety risk is high is solved in this application.
Description
Technical Field
The application relates to the field of steel box girder construction, in particular to a support and a construction method for carrying out upper-layer member construction by utilizing lower-part steel box girder bearing.
Background
With the continuous development of urban traffic, the three-dimensional bridge traffic becomes an effective means for relieving urban traffic pressure. Compared with a concrete beam, the steel structure box beam has the advantages of attractive appearance, environmental protection, light weight, reliable quality and the like, and is widely used in urban traffic construction.
On the premise that the bearing capacity of the foundation allows, the steel box girder is generally installed by a support method, and the upper structure is installed by using the lower foundation as the bearing. The conventional method in the vertical crossing construction process of the three-dimensional traffic is as follows: 1. the construction of the upper part structure is firstly carried out, the support is dismantled after the construction is finished, and then the construction of the lower part structure is carried out, but the mode wastes a large amount of time to wait for the completion of the construction of the upper part bridge, and the construction progress requirement is not met under the condition that the project construction period is short; 2. when the lower structure is constructed, a Bailey door opening is erected at the bottom of the upper steel box girder to provide a necessary construction space for the lower bridge, but the mode consumes a large number of supports, and the large-span door opening structure increases the safety risk of a project, so that the steel box girder mounting support in the related technology has the problems of low construction progress, consumption of a large number of supports and high construction safety risk.
Disclosure of Invention
The application mainly aims to provide a support for carrying out upper-layer member construction by utilizing lower-portion steel box girder bearing and a construction method, so as to solve the problems that a steel box girder mounting support in the related art is slow in construction progress, consumes a large amount of supports and is high in construction safety risk.
In order to achieve the above object, the present application provides a bracket for upper member construction using lower steel box girder bearing, including: the steel pipe support comprises a support foundation and a first steel pipe support arranged on the support foundation; the first steel pipe bracket is arranged below the lower steel box girder and is used for supporting the lower steel box girder; and the second steel pipe support is arranged on the upper surface of the lower steel box girder, and the upper end of the second steel pipe support is used for supporting the upper-layer member.
Furthermore, the first steel pipe support and the second steel pipe support are both arranged at the web plate position of the lower steel box girder.
Further, the support further comprises a cantilever arm lower support arranged on the support base and a cantilever arm upper support arranged at the upper end of the lower steel box girder, the cantilever arm lower support and the cantilever arm upper support are coaxially arranged, the cantilever arm lower support is connected with the flange of the lower steel box girder, and the cantilever arm upper support is used for supporting the upper-layer member.
Further, the lower support of the cantilever arm comprises a lower steel pipe of the cantilever arm and a cantilever arm support arranged at the upper end of the lower steel pipe of the cantilever arm, the cantilever arm support and the cantilever arm steel pipe are coaxially arranged, the cantilever arm support is connected with the flange of the lower steel box girder, and the lower end of the lower steel pipe of the cantilever arm is connected with the support foundation; the upper support of the cantilever arm comprises a steel pipe at the upper part of the cantilever arm, the lower end of the steel pipe at the upper part of the cantilever arm is welded with a steel box girder panel at the lower part, and the upper end of the steel pipe is used for supporting an upper layer member.
Furthermore, the support foundation comprises a concrete foundation poured on the ground and a steel structure embedded in the concrete foundation, and the lower end of the first steel pipe support and the lower end of the steel pipe below the cantilever arm are welded with the steel structure.
Further, first steel pipe support includes a plurality of first steel pipe stands, first steel pipe stand distributes in the both sides of lower part steel box girder and is connected through flat brace and bracing, first steel pipe stand lower extreme and steel construction welding, the upper end is connected with lower part steel box girder web position.
Furthermore, the second steel pipe support comprises a plurality of second steel pipe stand columns, the adjacent second steel pipe stand columns are connected through a flat support and an inclined support, the lower ends of the second steel pipe stand columns are welded to the upper end face of the lower steel box girder and located at the web plate position, the upper ends of the second steel pipe stand columns are provided with longitudinal distribution girders, the longitudinal distribution girders are provided with transverse distribution girders, and the upper ends of the transverse distribution girders are used for supporting upper-layer components.
Further, the steel construction includes the reinforcing bar and welds the steel sheet in the reinforcing bar upper end, the reinforcing bar is buckled and is squarely and sets up to three at least, first steel pipe stand lower extreme and the lower part steel pipe lower extreme of picking the arm all with the steel sheet welding.
Further, the second steel pipe stand sets up to 8 at least and evenly distributed in lower part steel box girder both sides.
According to another aspect of the present application, there is provided a construction method of a bracket for upper layer member construction using a lower steel box girder, including the steps of:
(1) constructing a support foundation, treating a foundation and pouring a concrete rectangular foundation;
(2) the method comprises the following steps that a first steel pipe support is erected, the length of a first steel pipe upright post is selected according to the elevation of a lower steel box girder, adjacent first steel pipe upright posts are connected through a flat support and an inclined support, and the first steel pipe support is hoisted to a support foundation and welded;
(3) erecting a lower support of the cantilever arm, selecting the length of the lower support of the cantilever arm according to the elevation of the flange of the lower steel box girder, hoisting the lower support of the cantilever arm to a support foundation and welding;
(4) constructing a lower steel box girder, namely hoisting the lower steel box girder to the upper ends of the first steel pipe bracket and the lower support of the cantilever arm, and completing primary splicing and welding of a segmented connecting plate on the lower steel box girder;
(5) erecting a second steel pipe support, selecting the length of a second steel pipe upright column according to the elevation of an upper-layer component, connecting adjacent second steel pipe upright columns through a flat support and an inclined support, hoisting the second steel pipe upright columns to a lower steel box girder panel and welding;
(6) erecting a cantilever upper support, selecting the length of the cantilever upper support according to the elevation of an upper-layer member, hoisting the cantilever upper support to a lower steel box girder panel, welding, and sequentially hoisting a longitudinal distribution beam and a transverse distribution beam to the upper ends of a second steel pipe upright post and the cantilever upper support;
(7) and (5) constructing an upper layer member, namely hoisting the upper layer member to the upper ends of the upper supports of the transverse distribution beam and the cantilever arm.
Further, it sets up to take a photograph of arm lower part support includes:
(31) manufacturing a steel pipe at the lower part of the cantilever arm;
(32) welding a cantilever arm support at the upper end of the steel pipe at the lower part of the cantilever arm;
(33) and hoisting the lower support of the cantilever arm to the support foundation and welding the lower support of the cantilever arm to ensure that the lower support of the cantilever arm is positioned at the flange position of the lower steel box girder.
Furthermore, after the lower steel box girder is hoisted, the first steel pipe upright post corresponds to the web plate of the lower steel box girder, and the lower support of the cantilever arm corresponds to the flange of the lower steel box girder.
Further, it sets up to take the arm upper portion support to include:
(61) manufacturing a steel pipe at the upper part of the cantilever arm;
(62) and hoisting the upper steel pipe of the cantilever arm to the lower steel box girder panel and welding the upper steel pipe and the lower steel pipe to enable the upper steel pipe and the lower steel pipe to be coaxial.
In the embodiment of the application, adopt lower part steel box girder as bearing structure's mode, through setting up the support basis, install first steel pipe support on the support basis, first steel pipe support is located lower part steel box girder below and is used for supporting lower part steel box girder, at lower part steel box girder upper surface mounting second steel pipe support, second steel pipe support is used for supporting upper member, the purpose of utilizing lower part steel box girder to carry out the installation of bearing upper member has been reached, thereby realized saving the engineering time, accelerate the construction progress, a large amount of supports and bailey support have been saved, the technological effect that construction safety factor is high, and then it is slow to have the construction progress to have solved the steel box girder installing support among the correlation technique, consume a large amount of supports, the problem that construction safety risk is high.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, serve to provide a further understanding of the application and to enable other features, objects, and advantages of the application to be more apparent. The drawings and their description illustrate the embodiments of the invention and do not limit it. In the drawings:
FIG. 1 is a schematic structural diagram according to an embodiment of the present application;
FIG. 2 is a schematic side view of an embodiment of the present application;
FIG. 3 is a schematic diagram illustrating a structure of a cantilever arm position according to an embodiment of the present application;
FIG. 4 is a schematic structural view of a steel structure according to an embodiment of the present application;
FIG. 5 is a schematic top view of a steel structure according to an embodiment of the present application;
fig. 6 is a schematic flow chart of a construction method according to an embodiment of the present application.
The steel pipe support comprises a support foundation 1, a first steel pipe support 2, a first steel pipe upright post 21, a lower steel box girder 3, a second steel pipe support 4, a second steel pipe upright post 41, a longitudinal distribution beam 5, an upper layer member 6, a transverse distribution beam 7, an upper support of an arm picking 8, a lower support of an arm picking 9, a steel structure 10, a steel plate 101 and a steel bar 102.
Detailed Description
In order to make the technical solutions better understood by those skilled in the art, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only partial embodiments of the present application, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
It should be noted that the terms "first," "second," and the like in the description and claims of this application and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It should be understood that the data so used may be interchanged under appropriate circumstances such that embodiments of the application described herein may be used.
In this application, the terms "upper", "lower", "inside", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings. These terms are used primarily to better describe the present application and its embodiments, and are not used to limit the indicated devices, elements or components to a particular orientation or to be constructed and operated in a particular orientation.
Moreover, some of the above terms may be used to indicate other meanings besides the orientation or positional relationship, for example, the term "on" may also be used to indicate some kind of attachment or connection relationship in some cases. The specific meaning of these terms in this application will be understood by those of ordinary skill in the art as appropriate.
Furthermore, the terms "disposed," "provided," "connected," "secured," and the like are to be construed broadly. For example, "connected" may be a fixed connection, a detachable connection, or a unitary construction; can be a mechanical connection, or an electrical connection; may be directly connected, or indirectly connected through intervening media, or may be in internal communication between two devices, elements or components. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.
In addition, the term "plurality" shall mean two as well as more than two.
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present application will be described in detail below with reference to the embodiments with reference to the attached drawings.
As shown in fig. 1 to 6, an embodiment of the present application provides a support for upper member construction using lower steel box girder bearing, including: the support comprises a support foundation 1 and a first steel pipe support 2 arranged on the support foundation 1; the first steel pipe bracket 2 is arranged below the lower steel box girder 3 and is used for supporting the lower steel box girder 3; and the second steel pipe bracket 4 is arranged on the upper surface of the lower steel box girder 3, and the upper end of the second steel pipe bracket 4 is used for supporting the upper-layer component 6.
In this embodiment, if the support position is the backfill position or the original foundation pit backfill position, the backfill soil and the soft soil layer are removed by an excavator, and the building masonry miscellaneous soil or 6% lime soil is backfilled and tamped. C25 concrete rectangular foundation is poured after foundation treatment is completed, the support foundation 1 adopts concrete to enlarge the foundation, the support foundation 1 comprises a concrete foundation poured on the ground and a steel structure 10 embedded in the concrete foundation, the lower end of a first steel pipe support 2 is welded with the steel structure 10, the concrete foundation expands 750mm outwards along the central line of an outer steel pipe, the first steel pipe support 2 is assembled, welded and formed on the ground and then is hoisted to the support foundation 1 through a crane, then a lower steel box girder 3 is hoisted to the upper end of the first steel pipe support 2, a second steel pipe support 4 is hoisted to the panel of the lower steel box girder 3 and is welded after being welded and formed on the ground, then an upper layer member 6 is hoisted to the second steel pipe support 4, because the supporting structure of the lower steel box girder 3 is not dismantled, the bearing capacity of the lower steel box girder 3 is enhanced, the weight of the upper layer member 6 is transmitted to the ground through the second steel pipe support 4 → the lower steel box girder 3 → the first steel pipe support 2, make full use of lower part steel box girder 3 structure is as supporting, effectively saves support material consumption, can carry out the construction of upper member 6 when carrying out the construction of lower part steel box girder 3 for the construction progress, because first steel pipe support 2 is as supporting for the support span is little, and construction safety factor is higher.
The web position of lower part steel box girder 3 is all located to first steel pipe support 2 and second steel pipe support 4, and when the weight of upper member 6 was great, the position that the web corresponds in lower part steel box girder 3 was all installed to first steel pipe support 2 and second steel pipe support 4 to ensure the safety and stability of lower part steel box girder 3.
As shown in fig. 1 to 6, the bracket further comprises a lower cantilever support 9 arranged on the bracket foundation 1 and an upper cantilever support 8 arranged at the upper end of the lower steel box girder 3, wherein the lower cantilever support 9 and the upper cantilever support 8 are coaxially arranged, the lower cantilever support 9 is connected with the flange of the lower steel box girder 3, the upper cantilever support 8 is used for supporting the upper member 6, the lower cantilever support 9 comprises a lower cantilever steel pipe and a cantilever support arranged at the upper end of the lower cantilever steel pipe, the cantilever support and the cantilever steel pipe are coaxially arranged, the cantilever support is connected with the flange of the lower steel box girder 3, and the lower end of the lower cantilever steel pipe is connected with the bracket foundation 1; the upper support 8 of the cantilever arm comprises an upper steel pipe of the cantilever arm, the lower end of the upper steel pipe of the cantilever arm is welded with the lower steel box girder 3 panel, and the upper end of the upper steel pipe of the cantilever arm is used for supporting the upper layer member 6.
As shown in fig. 1 to 6, the lower part of the cantilever armThe support 9 and the cantilever upper support 8 are both located at the flange position of the lower steel box girder 3 and are coaxially arranged, so that the weight of the upper component 6 can be smoothly transmitted to the ground, the stability of the upper component 6 and the stability of the lower steel box girder 3 are ensured, and the cantilever lower steel pipe and the cantilever upper steel pipe are both adopted
The cantilever arm support is welded at the upper end of the steel pipe upright post by adopting a small steel pipe and is connected with the steel pipe upright post in a reinforcing way by a stiffening rib.
As shown in fig. 1 to 6, the first steel pipe bracket 2 includes a plurality of first steel pipe columns 21, the first steel pipe columns 21 are distributed on both sides of the lower steel box girder 3 and connected by a flat brace and an inclined brace, the lower ends of the first steel pipe columns 21 are welded to the steel structure 10, and the upper ends are connected to the web of the lower steel box girder 3. The first steel pipe column 21 adopts
The steel pipe column, the flat brace and the inclined brace all adopt 14b channel steel, the lower end of the first steel pipe column 21 is welded with the steel plate 101 in the steel structure 10, and the upper end of the first steel pipe column is abutted against the position of the lower steel box girder 3 web.
As shown in fig. 1 to 6, steel construction 10 includes reinforcing bar 102 and the steel sheet 101 of welding in reinforcing bar 102 upper end, and reinforcing bar 102 is buckled and is squarely and set up to three at least, and first steel pipe stand 21 lower extreme and cantilever arm lower part steel pipe lower extreme all weld with steel sheet 101, improve support foundation 1's structural strength and stability in use.
As shown in fig. 1 to 6, the second steel pipe support 4 includes a plurality of second steel pipe columns 41, the adjacent second steel pipe columns 41 are connected by flat bracing and diagonal bracing, the lower ends of the second steel pipe columns 41 are welded to the upper end surface of the lower steel box girder 3 and located at the web position, the upper end is provided with a longitudinal distribution girder 5, the longitudinal distribution girder 5 is provided with a transverse distribution girder 7, and the upper end of the transverse distribution girder 7 is used for supporting the upper member 6. The second steel pipe column 41 adopts
The steel pipe upright post is connected with the inclined strut through the channel steel flat strut (the inclined strut is arranged at intervals) so as to increase the stability of the steel pipe upright postQualitatively, the horizontal supports among the columns adopt 14b channel steel, the inclined supports still adopt 14b channel steel and are welded with the steel tube columns through connecting plates, the longitudinal distribution beam 5 adopts double-spliced I56a I-steel, the transverse distribution beam 7 adopts double-spliced I36b I-steel, the upper part of the transverse distribution beam 7 is provided with small steel tubes and jacks for adjusting elevation, the number of the second steel tube columns 41 is at least 8, the second steel tube columns are uniformly distributed on two sides of the lower steel box beam 3, and the upper-layer member 6 is stably supported.
As shown in fig. 1 to 6, according to another aspect of the present application, there is provided a construction method of a bracket for upper-layer member 6 construction using a lower steel box girder 3, including the steps of:
(1) constructing a support foundation S1, processing the foundation and pouring a concrete rectangular foundation, if the backfill position is the backfill position or the original foundation pit backfill position, firstly removing the backfill soil and the soft soil layer by using an excavator, backfilling and tamping by using building masonry miscellaneous soil or 6% lime soil, pouring a C25 concrete rectangular foundation after the foundation is processed, and adopting concrete to expand the foundation 1;
(2) the method comprises the following steps that S2 is erected on a first steel pipe support, the length of a first steel pipe upright 21 is selected according to the elevation of a lower steel box girder 3, adjacent first steel pipe uprights 21 are connected through a flat brace and an inclined brace, the first steel pipe support 2 is hoisted on a support foundation 1 and welded, the upright adopts a phi 325 × 8 steel pipe, the top of the upright adopts stiffening ribs and a base plate to be welded and fixed with the steel pipe to form a small support platform, the steel pipe uprights are connected through channel steel flat braces and angle steel inclined braces (the angle steel inclined braces are arranged at intervals) to increase the stability, the flat braces among the uprights adopt 14b channel steel, and the inclined braces still adopt 14b channel steel and are welded with the steel pipe uprights through connecting plates;
(3) erecting S3 for the lower support of the cantilever arm, selecting the length of the lower support 9 of the cantilever arm according to the elevation of the flange of the lower steel box girder 3, hoisting the lower support 9 of the cantilever arm to the support foundation 1 and welding;
(4) constructing the lower steel box girder S4, namely hoisting the lower steel box girder 3 to the upper ends of the first steel pipe bracket 2 and the cantilever lower support 9, and completing primary splicing and welding of a segmented connecting plate on the lower steel box girder 3, namely, the lower steel box girder 3 can be used as a bearing structure, so that a large number of brackets and Bailey brackets are saved;
(5) the second steel pipe support is erected S5, the length of the second steel pipe upright post 41 is selected according to the elevation of the upper layer member 6, the adjacent second steel pipe upright posts 41 are connected through a flat brace and an inclined brace, and the second steel pipe upright post 41 is hoisted to the panel of the lower steel box girder 3 and welded;
(6) the upper support of the cantilever is erected with S6, the length of the upper support 8 of the cantilever is selected according to the elevation of the upper member 6, the upper support 8 of the cantilever is hoisted to the panel of the lower steel box girder 3 and welded, a longitudinal distribution girder 5 and a transverse distribution girder 7 are hoisted to the upper ends of the second steel pipe upright post 41 and the upper support 8 of the cantilever in sequence, the longitudinal distribution girder 5 adopts double-spliced I56a I-shaped steel, the transverse distribution girder 7 adopts double-spliced I36b I-shaped steel, and the upper part of the transverse distribution girder 7 is provided with a small steel pipe and a jack for adjusting elevation;
(7) the upper layer member construction S7 is to hoist the upper layer member 6 to the upper ends of the lateral distribution beams 7 and the cantilever upper supports 8.
As shown in fig. 1 to 5, the arm raising lower support 9 includes:
(31) manufacturing a steel pipe at the lower part of the cantilever arm;
(32) welding a cantilever arm support at the upper end of the steel pipe at the lower part of the cantilever arm;
(33) and hoisting the lower support 9 of the cantilever arm to the support foundation 1 and welding the lower support 9 of the cantilever arm to ensure that the lower support 9 of the cantilever arm is positioned at the flange position of the lower steel box girder 3.
As shown in fig. 1 to 5, after the lower steel box girder 3 is hoisted, the first steel pipe upright 21 corresponds to the web of the lower steel box girder 3, and the cantilever lower support 9 corresponds to the flange of the lower steel box girder 3.
As shown in fig. 1 to 5, the arm raising upper support 8 setting includes:
(61) manufacturing a steel pipe at the upper part of the cantilever arm;
(62) and hoisting the upper steel pipe of the cantilever arm to the panel of the lower steel box girder 3 and welding the upper steel pipe and the lower steel pipe to enable the upper steel pipe and the lower steel pipe to be coaxial.
The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.
Claims (10)
1. The utility model provides an utilize lower part steel box girder to bear the weight of support that carries out upper member construction which characterized in that includes:
the steel pipe support comprises a support foundation and a first steel pipe support arranged on the support foundation; wherein,
the first steel pipe bracket is arranged below the lower steel box girder and is used for supporting the lower steel box girder;
and the second steel pipe support is arranged on the upper surface of the lower steel box girder, and the upper end of the second steel pipe support is used for supporting the upper-layer member.
2. The bracket for upper layer member construction using lower steel box girder bearing according to claim 1, wherein the first steel pipe bracket and the second steel pipe bracket are both provided at a web position of the lower steel box girder.
3. The support for upper member construction using the lower steel box girder bearing of claim 2, further comprising a lower outrigger support provided on the support base and an upper outrigger support provided at the upper end of the lower steel box girder, the lower outrigger support and the upper outrigger support being coaxially disposed, wherein the lower outrigger support is connected to a flange of the lower steel box girder, and the upper outrigger support is used for supporting the upper member.
4. The support for upper component construction by using the lower steel box girder bearing of claim 3, wherein the cantilever lower support comprises a cantilever lower steel tube and a cantilever support arranged at the upper end of the cantilever lower steel tube, the cantilever support and the cantilever steel tube are arranged coaxially, the cantilever support is connected with the flange of the lower steel box girder, and the lower end of the cantilever lower steel tube is connected with a support foundation;
the upper support of the cantilever arm comprises a steel pipe at the upper part of the cantilever arm, the lower end of the steel pipe at the upper part of the cantilever arm is welded with a steel box girder panel at the lower part, and the upper end of the steel pipe is used for supporting an upper layer member.
5. The support for upper member construction by using the lower steel box girder bearing of any one of claims 1 to 4, wherein the first steel pipe support comprises a plurality of first steel pipe columns, the first steel pipe columns are distributed on two sides of the lower steel box girder and connected through a flat brace and an inclined brace, the lower ends of the first steel pipe columns are welded with the support foundation, and the upper ends of the first steel pipe columns are connected with the web position of the lower steel box girder.
6. The support for upper member construction by using lower steel box girder bearing according to claim 5, wherein the second steel pipe support comprises a plurality of second steel pipe columns, the adjacent second steel pipe columns are connected by flat bracing and diagonal bracing, the lower ends of the second steel pipe columns are welded on the upper end surface of the lower steel box girder and are located at the position of the web, the upper ends of the second steel pipe columns are provided with longitudinal distribution beams, the longitudinal distribution beams are provided with transverse distribution beams, and the upper ends of the transverse distribution beams are used for supporting the upper member.
7. A construction method of a support for upper layer member construction using the lower steel box girder according to claim 6, comprising the steps of:
(1) constructing a support foundation, treating a foundation and pouring a concrete rectangular foundation;
(2) the method comprises the following steps that a first steel pipe support is erected, the length of a first steel pipe upright post is selected according to the elevation of a lower steel box girder, adjacent first steel pipe upright posts are connected through a flat support and an inclined support, and the first steel pipe support is hoisted to a support foundation and welded;
(3) erecting a lower support of the cantilever arm, selecting the length of the lower support of the cantilever arm according to the elevation of the flange of the lower steel box girder, hoisting the lower support of the cantilever arm to a support foundation and welding;
(4) constructing a lower steel box girder, namely hoisting the lower steel box girder to the upper ends of the first steel pipe bracket and the lower support of the cantilever arm, and completing primary splicing and welding of a segmented connecting plate on the lower steel box girder;
(5) erecting a second steel pipe support, selecting the length of a second steel pipe upright column according to the elevation of an upper-layer component, connecting adjacent second steel pipe upright columns through a flat support and an inclined support, hoisting the second steel pipe upright columns to a lower steel box girder panel and welding;
(6) erecting a cantilever upper support, selecting the length of the cantilever upper support according to the elevation of an upper-layer member, hoisting the cantilever upper support to a lower steel box girder panel, welding, and sequentially hoisting a longitudinal distribution beam and a transverse distribution beam to the upper ends of a second steel pipe upright post and the cantilever upper support;
(7) and (5) constructing an upper layer member, namely hoisting the upper layer member to the upper ends of the upper supports of the transverse distribution beam and the cantilever arm.
8. The method of constructing a support for upper structure construction using lower steel box girder according to claim 7, wherein the cantilever lower support erection comprises:
(31) manufacturing a steel pipe at the lower part of the cantilever arm;
(32) welding a cantilever arm support at the upper end of the steel pipe at the lower part of the cantilever arm;
(33) and hoisting the lower support of the cantilever arm to the support foundation and welding the lower support of the cantilever arm to ensure that the lower support of the cantilever arm is positioned at the flange position of the lower steel box girder.
9. The method as claimed in claim 8, wherein the first steel pipe column corresponds to a web of the lower steel box girder after the lower steel box girder is hoisted, and the lower support of the cantilever corresponds to a flange of the lower steel box girder.
10. The method of constructing a support for upper structure construction using lower steel box girder according to claim 9, wherein the cantilever upper support erection comprises:
(61) manufacturing a steel pipe at the upper part of the cantilever arm;
(62) and hoisting the upper steel pipe of the cantilever arm to the lower steel box girder panel and welding the upper steel pipe and the lower steel pipe to enable the upper steel pipe and the lower steel pipe to be coaxial.
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| CN113957795A (en) * | 2021-09-18 | 2022-01-21 | 中铁大桥局集团有限公司 | Method and system for manufacturing beam by using large-span beam type support |
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