CN210421986U - Double-column structure underpinning node - Google Patents
Double-column structure underpinning node Download PDFInfo
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- CN210421986U CN210421986U CN201920934499.1U CN201920934499U CN210421986U CN 210421986 U CN210421986 U CN 210421986U CN 201920934499 U CN201920934499 U CN 201920934499U CN 210421986 U CN210421986 U CN 210421986U
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Abstract
The utility model relates to a twin columns structure underpins node, include: a pressurizing mechanism: the device comprises box-type rigid bodies (1) arranged on the left side and the right side of a double column to be underpinned and opposite-pulling screw rods (3) arranged on the front side and the rear side of the double column to be underpinned, wherein two ends of each opposite-pulling screw rod (3) are fixed on the box-type rigid bodies (1); a limiting mechanism: the device is arranged between the double columns to be underpinned and comprises limiting steel plates (4), a wedge-shaped body (5) arranged between the limiting steel plates (4) and a limiting screw (6) for fixing the wedge-shaped body (5) between the limiting steel plates (4); a restraint mechanism: comprises prestressed steel strands (7) which are encircled outside a box-shaped rigid body (1) and a double column to be underpinned. Compared with the prior art, the utility model discloses be suitable for underpinning of structure seam both sides post structure, simultaneously the utility model discloses the simple installation, can dismantle, repeatedly usable.
Description
Technical Field
The utility model relates to a ask to trade the node, especially relate to a two post structure asks to trade node.
Background
With the continuous development of social economy, the requirements of people on the use functions of the existing buildings are continuously changed, and the operation of jacking, shifting and the like of the buildings is often required according to the actual engineering requirements. The structure underpinning is an important link in the jacking and shifting engineering of buildings, and directly influences whether the jacking and shifting of the buildings are successful or not. In buildings newly built in recent decades in China, settlement joints, expansion joints or earthquake-resistant joints are often required to be arranged in the buildings in order to consider factors such as earthquake resistance, settlement, temperature stress and the like. At present, underpinning nodes commonly used for structure underpinning in the engineering field are single-column underpinning nodes, and cannot be suitable for the underpinning of the double-column structure at the seam setting position.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a two post structure underpins node in order to overcome the defect that above-mentioned prior art exists.
The purpose of the utility model can be realized through the following technical scheme:
a dual post structure underpin node comprising:
a pressurizing mechanism: the device comprises box-type rigid bodies arranged on the left side and the right side of a double column to be underpinned and opposite-pulling screw rods arranged on the front side and the rear side of the double column to be underpinned, wherein two ends of each opposite-pulling screw rod are fixed on the box-type rigid bodies;
a limiting mechanism: the device is arranged between the double columns to be underpinned and comprises limiting steel plates, a wedge body arranged between the limiting steel plates and a limiting screw rod for fixing the wedge body between the limiting steel plates;
a restraint mechanism: the device comprises prestressed steel strands which are encircled outside a box-shaped rigid body and a double column to be underpinned.
Furthermore, the box-shaped rigid body is formed by welding six steel plates, a longitudinal and transverse bidirectional stiffening rib is welded inside the box-shaped rigid body, and the thickness of the stiffening rib is not less than 8 mm. The rigidity of the box-type rigid body is increased, so that the reverse pressure generated by the counter-pulling screw rod can be uniformly transmitted to a underpinning interface; meanwhile, the reverse deflection of the box-type rigid body generated under the action of the counter-pulling screw rod can be reduced.
Furthermore, one side of the contact surface between the box-type rigid body and the double columns to be underpinned is coated with an A-level structural adhesive to prevent the box-type rigid body from being separated from the structural columns under the action of the counter-pulling screw rods.
Furthermore, the opposite-pulling screw rods are symmetrically arranged at the end part of the box-shaped rigid body, the diameter of the opposite-pulling screw rods is not less than 16mm, and the number of the opposite-pulling screw rods is not less than 4. The shearing resistance of the underpinning interface is mainly provided by the interface pressure generated by the counter-pulling screw rod, so the diameter and the number of the counter-pulling screw rods are determined by calculation. Meanwhile, in order to ensure that the interface pressure generated by the counter-pulling screw is not too small and the structure safety is influenced, the diameter of the counter-pulling screw is not less than 16mm, and the number of the counter-pulling screws is not less than 4.
Furthermore, round holes are formed in the penetrating positions of the counter-pulling screw rod and the pre-stressed steel strand of the box-shaped rigid body, and the diameter of each round hole is 2-3mm larger than that of the screw rod and that of the pre-stressed steel strand, so that the counter-pulling screw rod and the pre-stressed steel strand can smoothly penetrate through the round holes. And simultaneously, the edges of the holes of the prestressed steel strands are passivated to prevent the edges of the holes from damaging the prestressed steel strands.
Furthermore, the limiting steel plate comprises an upper limiting steel plate and a lower limiting steel plate, the limiting steel plate is a solid steel plate or a hollow box body, and a round hole is formed in the position, where the limiting screw penetrates, of the limiting steel plate. The limiting steel plate can generate bending deflection under the reverse action of the limiting screw rod, and the limiting steel plate can adopt a hollow box body for reducing the deflection of the limiting steel plate. The position of the limiting steel plate, where the limiting screw penetrates, is provided with a round hole, and the diameter of the round hole is 2-3mm larger than that of the screw.
Further, the wedge body includes that two sections are right trapezoid's first wedge body and a second wedge body that the section is isosceles trapezoid, the clearance between waiting to underpin the tight clearance of crowded back of two first wedge bodies and a second wedge body combination.
Furthermore, one side of the contact surface of the second wedge body and the column is coated with an A-level structural adhesive to prevent the second wedge body from vertically displacing in the downward extrusion process of the first wedge body. And the contact surface of the first wedge body and the second wedge body is coated with a lubricant so as to reduce the friction resistance of the first wedge body in the downward extrusion process.
Furthermore, the bottom edge of the second wedge-shaped body and the bottom edge of the box-type rigid body are at the same height.
Furthermore, the wedge body is provided with a long circular hole at the position where the prestressed steel strand penetrates, and the size of the long circular hole can adapt to the situation that the first wedge body does not touch the prestressed steel strand when moving downwards.
Furthermore, a baffle is welded at the position where the prestressed steel strand penetrates through the box-shaped rigid body, the height of the baffle protrudes out of the outer edge of the prestressed steel strand by 10-20mm, and the prestressed steel strand is prevented from vertically shifting in the tensioning and using processes.
Furthermore, the prestress wire joints are connected through a steel wire sleeve, and the prestress wire joints are arranged at the middle point of one side column, so that the prestress wire joints are convenient to connect.
Furthermore, a prestressed steel strand is arranged on the outer side of the box-shaped rigid body, so that the reverse deformation of the box-shaped rigid body under the action of a counter-pulling screw rod can be restrained; meanwhile, the contact pressure between the box-type rigid body and the underpinning column interface is increased, so that the overall bearing capacity of the underpinning node is improved.
Furthermore, stop gear sets up the inward flange to drawing the screw rod to reduce the atress span of wedge under the stop screw rod effect, prevent to produce too big deformation.
Furthermore, a lubricating layer is laid at the contact part of the prestressed steel strand with the box-type rigid body and the baffle, the lubricating layer is made of a polytetrafluoroethylene plate, the friction coefficient after the lubricating layer is arranged is not more than 0.005, and the purpose is to reduce the prestress loss in the tensioning process of the steel strand.
A manufacturing and using method of a underpinning node with a double-column structure comprises the following steps:
the method comprises the following steps: manufacturing a box-shaped rigid body, an internal stiffening rib and a baffle welded on the outer side of the box-shaped rigid body according to design requirements, and forming round holes at the positions where the counter-pulling screw rod and the prestressed steel strands penetrate, wherein the round holes at the positions of the prestressed steel strands are subjected to passivation treatment.
Step two: and (3) derusting one side of the contact surface of the box-type rigid body and the column, and after the treatment is finished, coating an A-level structural adhesive and fixing the box-type rigid body on the surface of the column.
Step three: and installing a counter-pulling screw rod, and screwing a nut to ensure that the contact between the box-type rigid body and the column to be underpinned is in a critical state.
Step four: the method comprises the following steps of manufacturing a limiting steel plate and a wedge body according to design requirements, wherein a round hole is formed in the position, where a limiting screw penetrates, of the limiting steel plate, a long round hole is formed in the position, where a prestressed steel strand penetrates, of the wedge body, and passivation treatment is performed on the long round hole in the position, corresponding to the prestressed steel strand, of the wedge body.
Step five: and (3) derusting the contact surface of the second wedge body and the column, after the treatment is finished, coating the A-level structural adhesive and fixing the second wedge body on the inner side of the column, wherein the bottom edge of the second wedge body is at the same height as the bottom edge of the box-type rigid body.
Step six: and brushing a lubricant on the contact surface of the second wedge-shaped body and the first wedge-shaped body, and inserting the first wedge-shaped body into the reserved space of the second wedge-shaped body.
Step seven: the upper limiting steel plate, the lower limiting steel plate and the limiting screw are installed, the first wedge body is made to move downwards continuously by screwing the nut, and the gap between the first wedge body, the second wedge body and the column is tightly squeezed, so that an integral structure is formed.
Step eight: and mounting prestressed steel strands at the design positions of the box-shaped rigid bodies, connecting the prestressed steel strands on two sides through steel strand sleeves, and performing initial tensioning.
Step nine: and after the prestressed steel strand is tensioned, the nut is screwed, the counter-pulling screw rod is tensioned, and the tensioning is stopped when the tensioning control force reaches the design requirement, so that the integral underpinning node is formed.
Compared with the prior art, the utility model discloses following beneficial effect has:
(1) the underpinning node is suitable for underpinning of a double-column structure.
(2) The underpinning node adopts a dual prestress system, and has large bearing capacity and high structural reliability.
(3) The underpinning node adopts a steel structural member, has no construction wet operation, and is green and environment-friendly.
(4) The underpinning node is simple and convenient to install, detachable and reusable.
Drawings
Fig. 1 is a cross-sectional view of the present invention;
FIG. 2 is a cross-sectional view A-A of FIG. 1;
FIG. 3 is a cross-sectional view B-B of FIG. 1;
FIG. 4 is a front view of a box-shaped rigid body;
FIG. 5 is a top view of a box-shaped rigid body;
FIG. 6 is a side view of a box-shaped rigid body;
FIG. 7 is an elevational view of the first wedge;
FIG. 8 is a side view of a first wedge;
FIG. 9 is an elevational view of the second wedge;
fig. 10 is a side view of a second wedge.
The reference numbers in the figures indicate:
1-box-shaped rigid body; 2-a stiffening rib; 3-pulling the screw rod oppositely; 4-limiting a steel plate; 41-upper limiting steel plate; 42-lower limiting steel plate; 5-a wedge; 51-a first wedge; 52-a second wedge; 6-a limit screw; 7-prestressed steel strands; 8-steel strand sleeve; 9-baffle plate.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.
Examples
As shown in fig. 1 to 3, a underpinning node with a double-column structure comprises a pressurizing mechanism, a limiting mechanism and a restraining mechanism. The pressurizing mechanism comprises a box-shaped rigid body 1 (shown in figures 5-6), a stiffening rib 2 and a counter-pull screw rod 3; the limiting mechanism comprises a limiting steel plate 4, a wedge-shaped body 5 and a limiting screw 6, wherein the limiting steel plate 4 comprises an upper limiting steel plate 41 and a lower limiting steel plate 42, and the wedge-shaped body 5 comprises a first wedge-shaped body 51 (shown in figures 7-8) and a second wedge-shaped body 52 (shown in figures 9-10); the restraint mechanism comprises prestressed steel strands 7, steel strand sleeves 8 and baffle plates 9.
The box-type rigid body 1 is formed by welding six steel plates, longitudinal and transverse bidirectional stiffening ribs 2 are respectively welded in the box-type rigid body 1, the thickness of the box-type rigid body is not less than 8mm, the rigidity of the box-type rigid body 1 is ensured, and reverse pressure generated by a counter-pulling screw rod 3 can be uniformly transmitted to a underpinning interface; and the reverse deflection of the box-shaped rigid body 1 under the action of the counter-pulling screw 3 can be reduced.
Round holes are formed in the box-shaped rigid body 1 at the positions where the counter-pulling screw rods 3 and the pre-stressed steel strands 7 penetrate, and the diameter of each round hole is 2-3mm larger than the diameter of each screw rod and the outer diameter of each pre-stressed steel strand 7. The edges of the holes of the prestressed steel strands 7 are passivated to prevent the edges of the holes from damaging the prestressed steel strands 7.
One side of the contact surface of the box-type rigid body 1 and the structural column is coated with an A-level structural adhesive to prevent the box-type rigid body 1 from being separated from the structural column under the action of the counter-pulling screw 3.
The opposite-pulling screw rods 3 are symmetrically arranged at the end part of the box-type rigid body 1, the diameter and the number of the opposite-pulling screw rods are determined according to the stress condition, the diameter is not less than 16mm, and the number is not less than 4. The shearing resistance of the underpinning interface is mainly provided by the interface pressure generated by the counter-pulling screw rods 3, so the diameter and the number of the counter-pulling screw rods 3 are determined by calculation. Meanwhile, in order to ensure that the interface pressure generated by the counter-pulling screw rods 3 is not too small and the structure safety is influenced, the diameter of the counter-pulling screw rods 3 is not less than 16mm, and the number of the counter-pulling screw rods is not less than 4.
The upper limiting steel plate 41 and the lower limiting steel plate 42 can be solid steel plates or hollow boxes, and the limiting steel plate 4 is provided with round holes at the positions where the limiting screws 6 penetrate. The limiting steel plate 4 can generate bending deflection under the reverse action of the limiting screw 6, and the limiting steel plate 4 can adopt a hollow box body for reducing the deflection of the limiting steel plate 4. The position of the limiting steel plate 4, through which the limiting screw 6 passes, is provided with a round hole, and the diameter of the round hole is 2-3mm larger than that of the screw.
The wedge body 5 comprises two first wedge bodies 51 with right trapezoid cross sections and one second wedge body 52 with isosceles trapezoid cross sections, and the two first wedge bodies 51 and the second wedge body 52 are combined to tightly squeeze a gap between the double columns to be underpinned. The wedge-shaped body 5 is provided with a long round hole at the position where the prestressed steel strand 7 penetrates. The oblong hole is sized to accommodate the first wedge 51 not to touch the pre-stressed steel strands 7 when displaced downwardly.
One side of the contact surface of the second wedge 52 and the column is coated with a level A structural adhesive to prevent the second wedge 52 from vertically displacing in the downward extrusion process of the first wedge 51. The first wedge 51 and the second wedge 52 are coated with lubricant to reduce the frictional resistance of the first wedge 51 during the downward pressing.
Limiting steel plate 4, wedge 5, limiting screw 6 should set up at 3 inward flanges of counter-pull screw to reduce the atress span of wedge 5 under the effect of limiting screw 6, prevent to produce too big deformation.
The box rigid body 1 outside sets up prestressing force steel strand wires 7, and the beneficial effect who sets up prestressing force steel strand wires 7 has: 1) the reverse deformation of the box-type rigid body 1 under the action of the counter-pulling screw 3 is restrained; 2) the contact pressure between the box-type rigid body 1 and the underpinning column interface is increased, so that the integral bearing capacity of the underpinning node is improved. In order to facilitate the connection of the prestressed steel strands 7, the joint position of the prestressed steel strands 7 is arranged near the midpoint of one side column.
In order to prevent the prestressed steel strand 7 from vertically shifting in the tensioning and using processes, baffle plates 9 are welded on two sides of the position where the prestressed steel strand 7 penetrates, and the height of each baffle plate 9 protrudes out of the outer edge of the steel strand by 10-20 mm.
The contact parts of the prestressed steel strands 7 and the box-type rigid bodies 1 and the baffle plates 9 are provided with lubricating layers, polytetrafluoroethylene plates are selected as materials, and the friction coefficient after the lubricating layers are arranged is not more than 0.005, so that the prestressed loss in the tensioning process of the steel strands is reduced.
A manufacturing and using method of a underpinning node with a double-column structure comprises the following steps:
the method comprises the following steps: manufacturing a box-shaped rigid body 1, an internal stiffening rib 2 and a baffle 9 welded on the outer side of the box-shaped rigid body according to design requirements, and forming round holes at the positions where the counter-pulling screw rod 3 and the prestressed steel strands 7 penetrate, wherein the round holes at the positions of the prestressed steel strands 7 are subjected to passivation treatment.
Step two: and (3) derusting one side of the contact surface of the box-type rigid body 1 and the column, and after the treatment is finished, coating an A-level structural adhesive and fixing the box-type rigid body 1 on the surface of the column.
Step three: and installing a counter-pulling screw rod 3, and tightening a nut to enable the contact between the box-type rigid body 1 and the column to be underpinned to be in a critical state.
Step four: the manufacturing method comprises the following steps of manufacturing a limiting steel plate 4 and a wedge 5 according to design requirements, wherein a round hole is formed in the penetrating position of a limiting screw 6 of the limiting steel plate 4, a long round hole is formed in the penetrating position of a prestressed steel strand 7 of the wedge 5, and passivation treatment is carried out on the long round hole in the corresponding position of the prestressed steel strand 7.
Step five: and (3) derusting the contact surface side of the second wedge body 52 and the column, after the treatment is finished, coating an A-level structural adhesive and fixing the second wedge body 52 on the inner side of the column, wherein the bottom edge of the second wedge body 52 is at the same height as the bottom edge of the box-type rigid body 1.
Step six: the contact surface of the second wedge 52 and the first wedge 51 is coated with lubricant, and the first wedge 51 is inserted into the reserved space of the second wedge 52.
Step seven: the upper limiting steel plate 41, the lower limiting steel plate 42 and the limiting screw 6 are installed, the first wedge-shaped body 51 is enabled to move downwards continuously by screwing the nut, and the gap among the first wedge-shaped body 51, the second wedge-shaped body 52 and the column is tightly squeezed, so that an integral structure is formed.
Step eight: and mounting prestressed steel strands 7 at the design position of the box-type rigid body 1, connecting the prestressed steel strands 7 on two sides through a steel strand sleeve 8, and performing initial tensioning.
Step nine: and after the prestressed steel strand 7 is tensioned, the nut is screwed, the counter-pulling screw rod 3 is tensioned, and the tensioning is stopped when the tensioning control force reaches the design requirement, so that the integral underpinning node is formed.
The embodiments described above are intended to facilitate the understanding and use of the invention by those skilled in the art. It will be readily apparent to those skilled in the art that various modifications to these embodiments may be made, and the generic principles described herein may be applied to other embodiments without the use of the inventive faculty. Therefore, the present invention is not limited to the above embodiments, and those skilled in the art should make improvements and modifications within the scope of the present invention according to the disclosure of the present invention.
Claims (10)
1. A double-column structure underpin node, comprising:
a pressurizing mechanism: the device comprises box-type rigid bodies (1) arranged on the left side and the right side of a double column to be underpinned and opposite-pulling screw rods (3) arranged on the front side and the rear side of the double column to be underpinned, wherein two ends of each opposite-pulling screw rod (3) are fixed on the box-type rigid bodies (1);
a limiting mechanism: the device is arranged between the double columns to be underpinned and comprises limiting steel plates (4), a wedge-shaped body (5) arranged between the limiting steel plates (4) and a limiting screw (6) for fixing the wedge-shaped body (5) between the limiting steel plates (4);
a restraint mechanism: comprises prestressed steel strands (7) which are encircled outside a box-shaped rigid body (1) and a double column to be underpinned.
2. The underpinning node of double column structure as claimed in claim 1, characterized in that said box-shaped rigid body (1) is welded by six steel plates, inside which are welded the stiffening ribs (2) with longitudinal and transverse directions, the thickness of said stiffening ribs (2) being not less than 8 mm.
3. The underpinning node of double column structure as claimed in claim 1, characterized in that said counter-pulling screws (3) are symmetrically arranged at the end of said box-type rigid body (1), the diameter of which is not less than 16mm, and the number of which is not less than 4.
4. The underpinning node of double-column structure as claimed in claim 1, wherein said limiting steel plate (4) comprises an upper limiting steel plate (41) and a lower limiting steel plate (42), said limiting steel plate (4) being a solid steel plate or a hollow box.
5. A underpinning node with a double column structure as claimed in claim 1, characterized in that said wedge (5) comprises two first wedges (51) with right trapezoid cross section and one second wedge (52) with isosceles trapezoid cross section, said two first wedges (51) and said one second wedge (52) are combined to squeeze the gap between the double columns to be underpinned.
6. The underpinning node of double column structure as claimed in claim 5, characterized in that said wedge (5) opens an oblong hole at the location where the prestressed steel strands (7) pass through, said oblong hole having a size such that the first wedge (51) does not touch the prestressed steel strands (7) when it is displaced downwards.
7. The underpinning node of the double-column structure as claimed in claim 1, wherein a baffle (9) is welded on the box-shaped rigid body (1) at the position where the prestressed steel strand (7) passes through, and the height of the baffle (9) protrudes 10-20mm from the outer edge of the prestressed steel strand (7).
8. The underpinning node of the double-column structure as claimed in claim 1, wherein a lubricating layer is arranged at the contact part of the prestressed steel strand (7) with the box-type rigid body (1) and the baffle (9).
9. The underpinning node of a double column structure as claimed in claim 1, characterized in that said prestressed steel strand (7) joints are connected by a steel strand sleeve (8), said prestressed steel strand (7) joints being placed at the midpoint of a side column.
10. The underpinning node of double column structure as claimed in claim 1, characterized in that said limit mechanism is arranged at the inner edge of said opposite pulling screw (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920934499.1U CN210421986U (en) | 2019-06-20 | 2019-06-20 | Double-column structure underpinning node |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201920934499.1U CN210421986U (en) | 2019-06-20 | 2019-06-20 | Double-column structure underpinning node |
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| CN210421986U true CN210421986U (en) | 2020-04-28 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110230410A (en) * | 2019-06-20 | 2019-09-13 | 同济大学建筑设计研究院(集团)有限公司 | A kind of dual beam configuration underpins node |
-
2019
- 2019-06-20 CN CN201920934499.1U patent/CN210421986U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110230410A (en) * | 2019-06-20 | 2019-09-13 | 同济大学建筑设计研究院(集团)有限公司 | A kind of dual beam configuration underpins node |
| CN110230410B (en) * | 2019-06-20 | 2024-03-19 | 同济大学建筑设计研究院(集团)有限公司 | Double-column structure underpinning node |
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