CN106351462B - Temporary steel pipe support prestress reinforcing structure and construction method thereof - Google Patents
Temporary steel pipe support prestress reinforcing structure and construction method thereof Download PDFInfo
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- CN106351462B CN106351462B CN201610905524.4A CN201610905524A CN106351462B CN 106351462 B CN106351462 B CN 106351462B CN 201610905524 A CN201610905524 A CN 201610905524A CN 106351462 B CN106351462 B CN 106351462B
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G23/00—Working measures on existing buildings
- E04G23/02—Repairing, e.g. filling cracks; Restoring; Altering; Enlarging
- E04G23/0218—Increasing or restoring the load-bearing capacity of building construction elements
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Abstract
The invention discloses a temporary steel pipe support prestress reinforcing structure and a construction method thereof, wherein the reinforcing structure comprises a first support structure, the first support structure mainly comprises two sections of steel pipes and a pair of steel plates, the two sections of steel pipes are vertically arranged and butted, the steel pipe positioned above is an upper section of steel pipe, prestress generated by jacking is applied to the upper section of steel pipe, the steel pipe positioned below is a lower section of steel pipe, one steel plate is used for being connected with a structural member on the top surface of a floor and is called an upper steel plate, the upper steel plate is fixed on the upper end of the upper section of steel pipe, the other steel plate is used for being connected with the structural member on the bottom surface of the floor and is called a lower steel plate, and the lower steel plate is fixed on the lower end of the lower section of steel pipe. The steel pipe support can solve the problem that the stress of the existing steel pipe support is lagged, the arrangement is flexible, the application range is expanded, the normal operation of production equipment cannot be influenced during construction, the arrangement positions of the steel brackets can be flexibly arranged according to actual conditions in the construction process, and the construction is convenient while the construction space is reasonably utilized.
Description
Technical Field
The invention relates to a building structure reinforcing technology, in particular to a temporary steel pipe support prestress reinforcing structure capable of being flexibly arranged and a construction method of the temporary steel pipe support prestress reinforcing structure.
Background
The building structure is reinforced, and the stability of the building structure is enhanced as the name suggests. The problem of insufficient bearing capacity of the column and the beam is often encountered in the building structure reinforcing process, and the frame column and beam members which do not meet the bearing capacity requirement need to be reinforced by additionally arranging temporary steel pipe supports, such as partial underpinning and the like.
The construction of the traditional temporary steel pipe support is generally to add the temporary steel pipe support at the position needing to be supported. However, the method of directly adding temporary steel pipe support has the following defects:
the steel pipe is subjected to stress lag in a supporting mode, and the structural component is slightly deformed due to the stress lag in the supporting mode, so that adverse effects are caused.
The bottom that the two paring steel pipe supported supports subaerial, consequently, under the not enough condition of ground space, can't directly arrange the steel pipe and support to the application occasion that the steel pipe supported receives very big restriction, and the construction is inconvenient, can't effectively guarantee the engineering quality.
And if temporary steel pipe support construction is carried out in a factory building, production equipment is inevitably positioned beside the steel pipe support, and production equipment needs to be stopped during construction, so that great economic loss is brought to enterprises.
Disclosure of Invention
The invention aims to provide a temporary steel pipe support prestress reinforcing structure which is simple in structure, low in manufacturing cost and convenient to construct and can ensure engineering quality.
The above object of the present invention is achieved by the following technical measures: the utility model provides a interim steel pipe supports prestressing force reinforced structure which characterized in that: the steel plate supporting structure comprises a first supporting structure, wherein the first supporting structure mainly comprises two sections of steel pipes and a pair of steel plates, the two sections of steel pipes are vertically arranged and butted, the steel pipe positioned above is an upper section steel pipe, the upper section steel pipe is applied with prestress generated by jacking, the steel pipe positioned below is a lower section steel pipe, one steel plate is used for being connected with a structural member of the top surface of a floor and is called as an upper steel plate, the upper steel plate is fixed on the upper end of the upper section steel pipe, the other steel plate is used for being connected with the structural member of the bottom surface of the floor and is called as a lower steel plate, and the lower steel plate is fixed on the lower end of the lower section steel pipe.
The upper section steel pipe is applied with prestress formed by jacking, so that the problem of stress lag of the conventional steel pipe support can be well solved, and the temporary support device is flexible in arrangement and greatly widens the application range of temporary support of the prestressed steel pipe. In addition, the arrangement position of the invention can avoid the position of the production equipment according to the actual situation on site, and the normal operation of the production equipment can not be influenced during the construction, thereby avoiding bringing great economic loss to enterprises; in the work progress, the position that sets up of steel cow foot can arrange according to actual conditions is nimble, can realize convenient construction when the rational utilization construction space. The invention has simple structure, low manufacturing cost and convenient construction, and can ensure the engineering quality.
In one embodiment of the present invention, the two steel pipes are butted by a pair of arc-shaped steel plates, inner surfaces of the pair of arc-shaped steel plates are fitted to outer wall surfaces of the two steel pipes, and the pair of arc-shaped steel plates are symmetrically welded to the outer wall surfaces of the butted portions of the two steel pipes.
In one embodiment of the present invention, the length of the arc-shaped steel plate is greater than or equal to 200mm, and the distance between the plate edges of the pair of arc-shaped steel plates is 30 to 50mm.
As an improvement of the present invention, a second supporting structure is additionally arranged between the lower steel plate and the lower steel tube, the second supporting structure mainly comprises a pair of steel tubes, a pair of stiffening ribs and H-shaped steel, the lower steel plate is fixed on the lower ends of the steel tubes of the second supporting structure, the stiffening ribs are arranged on the circumferences of the outer walls of the upper ends of the steel tubes of the second supporting structure and the lower ends of the lower steel tubes, the lower ends of the lower steel tubes and the stiffening ribs thereon are fixed on the upper flange of the H-shaped steel together, and the upper ends of the steel tubes of the second supporting structure and the stiffening ribs thereon are fixed on the lower flange of the H-shaped steel together.
In a preferred embodiment of the present invention, the distance between the lower end of the upper steel pipe and the upper end of the lower steel pipe is 0 to 5mm.
In one embodiment of the present invention, the lengths of the steel pipes of the second support structure are the same, and the thicknesses of the pair of lower steel plates are the same, so that the H-section steel is horizontally disposed.
The second purpose of the invention is to provide a construction method of the temporary steel pipe support prestressed reinforcement structure.
The above object of the present invention is achieved by the following technical measures: the construction method of the temporary steel pipe support prestress reinforcing structure is characterized by comprising the following steps:
fixing an upper steel plate and a lower steel plate on structural members of the top surface and the bottom surface of a floor respectively;
fixing the upper end of the upper section steel pipe on the upper steel plate, fixing the lower end of the lower section steel pipe on the lower steel plate, and positioning the upper section steel pipe right above the lower section steel pipe;
thirdly, a pair of steel cattle legs and two vertical steel plates are adopted, one side edge of each of the two vertical steel plates is welded to the outer wall of the upper section of steel pipe, the two vertical steel plates are symmetrically arranged, and the other side edge of each vertical steel plate is connected with one steel cattle leg;
fourth, a supporting steel plate fixed on the ground is arranged right below each steel bull foot, a jack is arranged on each supporting steel plate, and the steel bull feet are jacked through the jacks to apply prestress to the upper-section steel pipe;
after the prestress is applied, butting the lower end of the upper section of steel pipe with the upper end of the lower section of steel pipe;
removing the jack, the steel bull feet and the vertical steel plate to obtain a temporary steel pipe support prestress reinforcing structure.
As an embodiment of the invention, in the step fifthly, the distance between the lower end of the upper section steel pipe and the upper end of the lower section steel pipe is 0-5 mm.
The above object of the present invention can also be achieved by the following technical measures: a construction method of a temporary steel pipe support prestress reinforcing structure is characterized by comprising the following steps:
the lower ends of a pair of steel pipes of a second supporting structure are respectively fixed on the lower steel plates;
secondly, welding stiffening ribs on the circumferences of the outer walls of the upper ends of the pair of steel pipes of the second supporting structure, and then welding the upper ends of the pair of steel pipes and the stiffening ribs on the steel pipes on the lower flange of the H-shaped steel together;
thirdly, welding stiffening ribs on the circumference of the outer wall of the lower end of the lower section steel pipe, and then welding the lower end of the lower section steel pipe and the stiffening ribs on the lower end of the lower section steel pipe on the upper flange of the H-shaped steel together;
an upper steel plate is arranged right above the lower section steel pipe, the upper steel plate is fixed to the structural member on the top surface of the floor, and the upper end of the upper section steel pipe is fixed to the upper steel plate;
fifthly, welding one side edge of the two vertical steel plates to the outer wall of the upper section of steel pipe by using a pair of steel bull feet and the two vertical steel plates, wherein the two vertical steel plates are symmetrically arranged, and one steel bull foot is connected to the other side edge of each vertical steel plate;
sixthly, arranging a supporting steel plate fixed on the bearing surface under each steel ox foot, arranging a jack on each supporting steel plate, and jacking the steel ox foot through the jack to apply prestress to the upper section steel pipe;
after prestressing is applied, butting the lower end of the upper section steel pipe with the upper end of the lower section steel pipe;
and removing the jack, the steel bracket and the vertical steel plate to obtain the temporary steel pipe support prestress reinforcing structure.
As an embodiment of the present invention, the bearing surface is an upper surface of an upper flange of the H-section steel.
As another embodiment of the invention, in the step fifthly, another pair of steel bulldog legs and another two vertical steel plates are adopted, one side edge of each of the two vertical steel plates is welded on the outer wall of the lower section steel pipe, the two vertical steel plates are symmetrically arranged, the other side edge of each vertical steel plate is connected with one steel bulldog leg, and the steel bulldog leg on the lower section steel pipe is opposite to the steel bulldog leg on the upper section steel pipe in the vertical direction; in the step sixteenth, a supporting steel plate is fixed on the upper surface of each steel heel positioned on the lower section of the steel pipe, a jack is arranged on the supporting steel plate, the steel heel positioned on the upper section of the steel pipe is jacked up by the jack, and prestress is applied to the upper section of the steel pipe, namely the bearing surface is the upper surface of the steel heel positioned on the lower section of the steel pipe.
Compared with the prior art, the invention has the following remarkable effects:
the steel pipe support structure applies prestress to the upper section steel pipe through jacking of the jacks, and well solves the problem that the stress of the existing steel pipe support is lagged.
The invention has various embodiments, so that the arrangement position of the invention can avoid the position of the production equipment according to the actual situation on site, and the normal operation of the production equipment can not be influenced during construction, thereby avoiding great economic loss brought to enterprises.
The steel bull feet are used as an intermediary for applying prestress to the upper section steel pipe, the arrangement positions of the steel bull feet can be flexibly arranged according to actual conditions, and construction is convenient while construction space is reasonably utilized.
The prestressed steel pipe temporary support is flexible in arrangement, and the application range of the prestressed steel pipe temporary support is greatly expanded.
The invention has the advantages of simple structure, low manufacturing cost, convenience in construction and capability of ensuring the engineering quality.
Drawings
The invention is described in further detail below with reference to the figures and the specific embodiments.
FIG. 1 is a schematic view of the structure of example 1 of the present invention (arc-shaped steel plate is not shown);
FIG. 2 is a schematic perspective view of a structure of an arc-shaped steel plate connecting an upper section steel pipe and a lower section steel pipe in example 1 of the present invention;
FIG. 3 is a schematic structural view (not shown with arc-shaped steel plates) in the construction process of example 1 of the present invention;
FIG. 4 is a schematic structural view of example 2 of the present invention (arc-shaped steel plate not shown);
FIG. 5 is a schematic view of a construction process according to example 2 of the present invention (arc-shaped steel plate is not shown);
FIG. 6 is a second schematic structural view (not shown) of the construction process of example 2 of the present invention.
Detailed Description
Example 1
As shown in fig. 1 and 2, the temporary steel pipe support prestress reinforcing structure of the present invention includes a first support structure, the first support structure mainly includes two sections of steel pipes and a pair of square steel plates, the size of the square steel plates should be determined according to actual needs and related current specifications, regulations, etc., the steel pipes are seamless steel pipes, the two sections of steel pipes are vertically arranged and butted, the steel pipe above is an upper section of steel pipe 1, the upper section of steel pipe 1 is applied with prestress generated by jacking, the steel pipe below is a lower section of steel pipe 2, one of the steel plates is used for connecting with a structural member 16 on the top surface of a floor, which is called as an upper steel plate 3, the structural member 16 is a beam or a plate, etc., the upper steel plate 3 is connected with the beam or the plate through a chemical anchor bolt 18, and the size and the number of the chemical anchor bolts should be determined according to actual needs and related current specifications, regulations, etc. The upper steel plate 3 is fixed to the upper end of the upper steel pipe 1, and another steel plate is used to connect to a structural member 17 of the floor bottom, called a lower steel plate 4, the structural member 17 is a beam or a plate, etc., the lower steel plate 4 is connected to the beam or the plate by a chemical anchor bolt 18, and the lower steel plate 4 is fixed to the lower end of the lower steel pipe 2.
The distance between the lower end of the upper section steel pipe 1 and the upper end of the lower section steel pipe 2 is 0-5 mm. In the embodiment, the upper section steel pipe 1 and the lower section steel pipe 2 are butted by a pair of arc-shaped steel plates 5, and the length of the arc-shaped steel plates 5 is greater than or equal to 200mm. The inner surfaces of the pair of arc-shaped steel plates 5 are matched with the outer wall surfaces of the upper section steel pipe 1 and the lower section steel pipe 2, the pair of arc-shaped steel plates 5 are symmetrically welded on the outer wall surface of the butt joint part of the upper section steel pipe 1 and the lower section steel pipe 2, and the distance between the plate edges of the pair of arc-shaped steel plates 5 is 30-50 mm.
As shown in fig. 3, the construction method of the temporary steel pipe support prestressed reinforcement structure includes the following steps:
fixing an upper steel plate 3 and a lower steel plate 4 on structural members of a top surface and a bottom surface of a floor respectively;
fixing the upper end of the upper section steel pipe 1 on the upper steel plate 3, fixing the lower end of the lower section steel pipe 2 on the lower steel plate 4, and positioning the upper section steel pipe 1 right above the lower section steel pipe 2;
the pair of steel cow legs 6 and the two vertical steel plates 7 are adopted, one side edge of each vertical steel plate 7 is welded to the outer wall of the upper section of the steel pipe 1, the two vertical steel plates 7 are symmetrically arranged, and the other side edge of each vertical steel plate 7 is connected with one steel cow leg 6 through a high-strength bolt 19; the number and size of the high-strength bolts 19 used for connecting the steel bull feet and the steel plates are determined according to actual needs and relevant current specifications, regulations and the like.
A supporting steel plate 8 fixed on the ground is arranged right below each steel bull foot 6, a jack 9 is arranged on each supporting steel plate 8, and the steel bull feet 6 are jacked through the jacks 9 to apply prestress to the upper-section steel pipe 1; the prestress applied by the jack is determined according to actual needs and relevant current specifications, regulations and the like.
After the prestress is applied, butting the lower end of the upper-section steel pipe 1 with the upper end of the lower-section steel pipe 2; specifically, a pair of arc-shaped steel plates 5 are symmetrically welded on the outer wall surface of the butt joint part of the upper section steel pipe 1 and the lower section steel pipe 2, as shown in fig. 2.
Sixthly, removing the jack 9, the steel bull's feet 6 and the vertical steel plate 7 to obtain a temporary steel pipe support prestress reinforcing structure.
Example 2
As shown in fig. 4, the present embodiment is different from embodiment 1 in that: the second supporting structure is additionally arranged between the lower steel plate 4 and the lower steel plate 2, the second supporting structure mainly comprises a pair of steel pipes 12, stiffening ribs 10 and H-shaped steel 11, the steel pipes are seamless steel pipes, the lower steel plate 4 is a pair, the pair of lower steel plates 4 are respectively fixed on the lower ends of the steel pipes 12 of the second supporting structure, the lengths of the steel pipes 12 are the same, the thickness of the pair of lower steel plates 4 is the same, the H-shaped steel 11 is horizontally arranged, the stiffening ribs 10 are arranged on the outer wall circumferences of the upper ends of the steel pipes 12 of the second supporting structure and the lower ends of the lower steel pipes 2, the lower ends of the lower steel pipes 2 and the stiffening ribs 10 thereon are jointly fixed on the upper flange of the H-shaped steel 11, and the upper ends of the steel pipes 12 of the second supporting structure and the stiffening ribs 10 thereon are jointly fixed on the lower flange of the H-shaped steel 11.
As shown in fig. 5, the construction method of the temporary steel pipe support prestressed reinforcement structure includes the following steps:
firstly, fixing the pair of lower steel plates 4 on a structural member on the bottom surface of a floor, and then fixing the lower ends of a pair of steel pipes 12 of a second supporting structure on the lower steel plates 4 respectively;
welding stiffening ribs 10 on the circumference of the outer walls of the upper ends of the pair of steel pipes 12 of the second supporting structure, and then welding the upper ends of the pair of steel pipes 12 and the stiffening ribs 10 on the steel pipes on the lower flange of the H-shaped steel 11 together;
thirdly, welding stiffening ribs 10 on the circumference of the outer wall of the lower end of the lower section steel pipe 2, and then welding the lower end of the lower section steel pipe 2 and the stiffening ribs 10 thereon on the upper flange of the H-shaped steel 11 together;
an upper steel plate 3 is arranged right above the lower steel pipe 2, namely the upper steel plate 3 is fixed on a structural member on the top surface of a floor, and then the upper end of the upper steel pipe 2 is fixed on the upper steel plate 3;
fifthly, welding one side edge of each of the two vertical steel plates 7 to the outer wall of the upper-section steel pipe 1 by using a pair of steel bosses 6 and the two vertical steel plates 7, wherein the two vertical steel plates 7 are symmetrically arranged, and the other side edge of each vertical steel plate 7 is connected with one steel boss 6 through a high-strength bolt 19;
sixthly, arranging a supporting steel plate 8 fixed on a bearing surface right below each steel bull foot 6, wherein in the embodiment, the bearing surface is the upper surface of the upper flange of the H-shaped steel 11, arranging a jack 9 on the supporting steel plate 8, and jacking the steel bull feet 6 through the jack 9 to apply prestress on the upper section of steel pipe 1;
after prestressing is applied, butting the lower end of the upper section steel pipe 1 with the upper end of the lower section steel pipe 2; specifically, a pair of arc-shaped steel plates 5 are symmetrically welded on the outer wall surface of the butt joint part of an upper section steel pipe 1 and a lower section steel pipe 2;
and removing the jack 9, the steel bracket 6 and the vertical steel plate 7 to obtain the temporary steel pipe support prestress reinforcing structure.
Example 3
As shown in fig. 6, the present embodiment is different from embodiment 2 in that: in the step fifthly, the other pair of steel brackets 13 and the other two vertical steel plates 14 are adopted, one side edges of the two vertical steel plates 14 are welded to the outer wall of the lower-section steel pipe 2, the two vertical steel plates 14 are symmetrically arranged, the other side edge of each vertical steel plate 14 is connected with one steel bracket 13 through a high-strength bolt 19, and the steel brackets 13 on the lower-section steel pipe 2 are opposite to the steel brackets 6 on the upper-section steel pipe 1 in the vertical direction; in the step sixteenth, a supporting steel plate 15 is fixed on the upper surface of each steel heel 13 on the lower section of the steel pipe 2, a jack 9 is arranged on the supporting steel plate 15, the steel heel 6 on the upper section of the steel pipe 1 is jacked up by the jack 9 to apply prestress to the upper section of the steel pipe 1, and namely the bearing surface is the upper surface of the steel heel 13 on the lower section of the steel pipe 2.
The diameter and the thickness of the seamless steel pipe are determined according to actual needs and relevant current specifications, regulations and the like, and the seamless steel pipe can be divided into two sections of steel pipes in embodiment 1 or four sections of steel pipes in embodiment 2 according to the conditions of a construction site: when the space of the support position of the prestressed steel pipe is enough, two sections of seamless steel pipes are adopted; when equipment exists at the position where the prestressed steel pipe is required to be arranged or the space is insufficient due to other reasons, the steel pipe cannot directly fall under the prestressed steel pipe, and four sections of seamless steel pipes are adopted.
When the seamless steel pipe adopts two sections of seamless steel pipes, the length of the seamless steel pipes at the two ends can be adjusted according to the actual needs on site, but after the arrangement of the steel pipes is finished, the distance between the upper section of steel pipe and the lower section of steel pipe is 0-5 mm.
When the seamless steel pipe adopts four sections of seamless steel pipes, the lengths of the pair of seamless steel pipes of the upper section, the lower section and the second support structure can be adjusted according to actual needs on site, but the length of the pair of seamless steel pipes of the second support structure is the same, the thickness of the steel plate connected with the pair of seamless steel pipes is the same, and after the arrangement of the steel pipes is finished, the distance between the upper section and the lower section of the steel pipe is 0-5 mm.
The bearing capacity and the structure of the structural members such as beams or plates and the like, which are connected with the square steel plates through chemical anchor bolts, of the floors need to meet the requirements of temporary prestressed steel pipe support arrangement and use and the regulations of relevant current specifications, regulations and the like, and when the bearing capacity and the structure of the structural members do not meet the requirements, the positions meeting the requirements need to be selected again or corresponding reinforcing measures are taken to enable the relevant structural members to meet the requirements, and then the temporary prestressed steel pipe support structures are arranged.
The size of the stiffeners should be determined according to actual needs and relevant current specifications, regulations, etc. The size and the related requirements of the welding seams for the upper part of the lower steel pipe and the lower part of the middle steel pipe and the stiffening ribs and the size and the related requirements of the welding seams for connecting the steel pipes and the stiffening ribs with the H-shaped steel are determined according to actual needs and related current specifications, regulations and the like.
The size of the steel ox foot is determined according to actual needs and relevant current specifications, regulations and the like, and two or four steel ox feet can be adopted according to the conditions of a construction site: when the space near the position for arranging the prestressed steel pipe is enough, two steel brackets are adopted, and each steel bracket is connected with one steel plate through a high-strength bolt; when arranging near prestressing steel pipe support position and having equipment or cause the space not enough because of other reasons, the jack can not directly fall on floor ground or H shaped steel roof beam, adopts four steel cow feet, and every steel cow foot is connected through high strength bolt with a steel sheet respectively.
Vertical steel sheet of being connected with steel ox foot: when two steel brackets are adopted, the vertical steel plates connected with the steel brackets are connected with the upper seamless steel pipe in a welding mode, the two vertical steel plates are symmetrically arranged, and the arrangement height is determined according to the height required by the arrangement of the jack and the thickness of the steel plate below the jack; when four steel bull feet are adopted, two vertical steel plates are connected with an upper seamless steel pipe respectively in a welding mode, the other two vertical steel plates are connected with a seamless steel pipe right below the upper seamless steel pipe respectively in a welding mode, the four vertical steel plates are arranged in a pairwise symmetry mode and aligned up and down, and the arrangement distance is determined according to the required height of the jack arrangement and the steel plates below the jack arrangement.
The size of the vertical steel plate connected with the steel ox feet is determined according to actual needs and relevant current specifications, regulations and the like.
The vertical steel plate connected with the steel bracket is connected with the seamless steel tube in a welding mode, and the size and related requirements of a welding seam are determined according to actual needs and related current specifications, regulations and the like.
The number of the jacks is two, the supporting steel plates are placed below the jacks, the jacks are erected under the two steel brackets at the upper end respectively after the steel brackets are installed, and prestress is applied according to needs. The size of the supporting steel plate placed below the jack is determined according to actual needs and relevant current specifications, regulations and the like.
When the supporting steel plate below the jack is placed on structural members such as beams or plates below a floor, the bearing capacity and the structure of the structural members meet the requirements of temporary jack arrangement and prestress application and the regulations of related current specifications and regulations, and when the bearing capacity and the structure of the structural members do not meet the requirements, the position meeting the requirements needs to be selected again or corresponding reinforcement measures are taken to enable the related structural members to meet the requirements, and then the supporting steel plate and the jacks above the supporting steel plate are arranged.
The two arc-shaped steel plates used for fixedly connecting the seamless steel pipe above and the seamless steel pipe below are completely the same in size, the height of the arc-shaped steel plates is determined according to actual needs and relevant current specifications, regulations and the like, but is not less than 200mm, the inner diameter is the same as the outer diameter of the seamless steel pipe, and the wall thickness is 2mm more than that of the seamless steel pipe. The two arc-shaped steel plates are symmetrically welded, and the arc length of the arc-shaped steel plates meets the following requirements: in order to facilitate construction, when the two arc-shaped steel plates are fixed on the seamless steel pipe in a welding mode, the distance between the edges of the arc-shaped steel plates is 30-50 mm.
The size of the welding seam between the arc-shaped steel plate and the upper seamless steel pipe and between the arc-shaped steel plate and the lower seamless steel pipe are determined according to actual needs and relevant current specifications, regulations and the like.
The embodiments of the present invention are not limited thereto, and according to the above-mentioned contents of the present invention, the present invention can be modified, substituted or changed in other various forms without departing from the basic technical idea of the present invention.
Claims (7)
1. The utility model provides a interim steel pipe supports prestressing force reinforced structure which characterized in that: the steel pipe support structure comprises a first support structure, wherein the first support structure mainly comprises two sections of steel pipes and three steel plates, the two sections of steel pipes are vertically arranged and butted, the steel pipe positioned above is an upper section of steel pipe, prestress generated by jacking is applied to the upper section of steel pipe, the steel pipe positioned below is a lower section of steel pipe, one steel plate is used for being connected with a structural member on the top surface of a floor and is called an upper steel plate, the upper steel plate is fixed on the upper end of the upper section of steel pipe, and the other two steel plates are used for being connected with the structural member on the bottom surface of the floor and are called lower steel plates; the two sections of steel pipes are butted through a pair of arc-shaped steel plates, the inner surfaces of the arc-shaped steel plates are matched with the outer wall surfaces of the two sections of steel pipes, and the arc-shaped steel plates are symmetrically welded on the outer wall surfaces of the butted parts of the two sections of steel pipes; the second supporting structure is additionally arranged between the lower steel plates and the lower section of steel pipe and mainly comprises a pair of steel pipes, stiffening ribs and H-shaped steel, the two lower steel plates are respectively fixed on the lower ends of the steel pipes of the second supporting structure, the stiffening ribs are arranged on the outer wall circumferences of the upper ends of the steel pipes of the second supporting structure and the lower ends of the lower section of steel pipes, the lower ends of the lower section of steel pipes and the stiffening ribs on the lower ends of the lower section of steel pipes are jointly fixed on the upper flange of the H-shaped steel, and the upper ends of the steel pipes of the second supporting structure and the stiffening ribs on the steel pipes of the second supporting structure are jointly fixed on the lower flange of the H-shaped steel.
2. The temporary steel pipe supporting prestressed reinforcement structure of claim 1, wherein: the length of the arc-shaped steel plate is more than or equal to 200mm, and the distance between the plate edges of the pair of arc-shaped steel plates is 30-50 mm.
3. The temporary steel pipe supporting prestressed reinforcement structure of claim 2, wherein: and the distance between the lower end of the upper section of steel pipe and the upper end of the lower section of steel pipe is 0-5 mm.
4. The temporary steel pipe supporting prestressed reinforcement structure of claim 3, wherein: the lengths of the steel pipes of the second supporting structure are the same, and the thicknesses of the two lower steel plates are the same, so that the H-shaped steel is horizontally arranged.
5. A construction method of the temporary steel pipe supported prestressed reinforcement structure according to claim 1, comprising the steps of:
the method comprises the steps of fixing two lower steel plates on a structural member on the bottom surface of a floor, and fixing the lower ends of a pair of steel pipes of a second supporting structure on the lower steel plates respectively;
secondly, welding stiffening ribs on the circumferences of the outer walls of the upper ends of the pair of steel pipes of the second supporting structure, and then welding the upper ends of the pair of steel pipes and the stiffening ribs on the steel pipes on the lower flange of the H-shaped steel together;
thirdly, welding stiffening ribs on the circumference of the outer wall of the lower end of the lower section of steel pipe, and then welding the lower end of the lower section of steel pipe and the stiffening ribs on the lower end of the lower section of steel pipe on the upper flange of the H-shaped steel together;
an upper steel plate is arranged right above the lower section steel pipe, the upper steel plate is fixed to the structural member on the top surface of the floor, and the upper end of the upper section steel pipe is fixed to the upper steel plate;
fifthly, welding one side edge of the two vertical steel plates to the outer wall of the upper section of steel pipe by using a pair of steel bull feet and the two vertical steel plates, wherein the two vertical steel plates are symmetrically arranged, and one steel bull foot is connected to the other side edge of each vertical steel plate;
setting a supporting steel plate fixed on a bearing surface right below each steel bull foot, setting a jack on the supporting steel plate, and jacking the steel bull feet through the jack to apply prestress to the upper section of the steel pipe;
after prestressing is applied, butting the lower end of the upper section steel pipe with the upper end of the lower section steel pipe;
and removing the jack, the steel bracket and the vertical steel plate to obtain the temporary steel pipe support prestress reinforcing structure.
6. The construction method of the temporary steel pipe support prestressed reinforcement structure of claim 5, characterized in that: the bearing surface is the upper surface of the upper flange of the H-shaped steel.
7. The construction method of the temporary steel pipe support prestressed reinforcement structure of claim 5, characterized in that: in the step fifthly, the other pair of steel bullfeet and the other two vertical steel plates are adopted, one side edge of each of the two vertical steel plates is welded to the outer wall of the lower section of the steel pipe, the two vertical steel plates are symmetrically arranged, the other side edge of each vertical steel plate is connected with one steel bullfoot, and the steel bullfoot on the lower section of the steel pipe is opposite to the steel bullfoot on the upper section of the steel pipe; in the step sixteenth, a supporting steel plate is fixed on the upper surface of each steel heel positioned on the lower section of the steel pipe, a jack is arranged on the supporting steel plate, the steel heel positioned on the upper section of the steel pipe is jacked up by the jack, and prestress is applied to the upper section of the steel pipe, namely the bearing surface is the upper surface of the steel heel positioned on the lower section of the steel pipe.
Priority Applications (1)
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| CN106917504A (en) * | 2017-03-07 | 2017-07-04 | 中铁大桥局集团第六工程有限公司 | A kind of stull steel-tube construction and its construction method with piecing devices |
| CN107132121A (en) * | 2017-05-12 | 2017-09-05 | 北京建筑大学 | A kind of X-shaped Steel Tube Joint tension experimental provision |
| CN107740538B (en) * | 2017-10-16 | 2023-11-10 | 杭萧钢构（安徽）有限公司 | Steel upright post structure and application method thereof |
| CN108589929A (en) * | 2018-05-14 | 2018-09-28 | 武大巨成结构股份有限公司 | A kind of construction method that old residential area is transformed using synchronous jacking device |
| CN109440922A (en) * | 2018-12-26 | 2019-03-08 | 上海建工七建集团有限公司 | Strenthening member and its application construction method for basement structure |
| CN109838114B (en) * | 2019-04-01 | 2024-01-26 | 吉林建筑大学 | Reinforced concrete structure reverse dismantling temporary support conversion device and operation method thereof |
| CN111042579A (en) * | 2020-01-02 | 2020-04-21 | 中国建筑第八工程局有限公司 | Quick back jacking device and method for load-bearing structure |
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