CN110886396A - Reinforced concrete sliding support and construction method thereof - Google Patents
Reinforced concrete sliding support and construction method thereof Download PDFInfo
- Publication number
- CN110886396A CN110886396A CN201911141569.9A CN201911141569A CN110886396A CN 110886396 A CN110886396 A CN 110886396A CN 201911141569 A CN201911141569 A CN 201911141569A CN 110886396 A CN110886396 A CN 110886396A
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- steel plate
- embedded steel
- sliding
- anchor bar
- lower embedded
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/36—Bearings or like supports allowing movement
Abstract
The invention discloses a reinforced concrete sliding support, which relates to the technical field of construction engineering construction and comprises a fixed part, an upper embedded steel plate, a lower embedded steel plate, a tetrafluoroethylene plate and a sliding part, wherein a leveling layer is arranged between the lower embedded steel plate and the fixed part, a plurality of lower anchor bars are embedded in the fixed part, and one ends of the lower anchor bars extend out of the fixed part and are used for positioning and temporarily fixing the elevation of the lower embedded steel plate. In order to overcome the defects that the sliding surface levelness of the existing sliding support is low, the sliding resistance is large, and the sliding platform is not easy to slide, the sliding support has the advantages that a plurality of points on the lower embedded steel plate are fixedly supported through a plurality of lower anchor bars, the levelness of the upper surface of the lower embedded steel plate is ensured, and the sliding support is small in sliding resistance and easy to slide.
Description
Technical Field
The invention relates to the technical field of construction of constructional engineering, in particular to a reinforced concrete sliding support and a construction method thereof.
Background
In the arch structure test, in order to verify the degree of influence of the horizontal displacement of the arch support on the arch structure, a horizontal sliding test is generally performed, and therefore, sliding support construction is required.
The conventional sliding support structure is shown in fig. 1 and comprises a fixed part 1, a lower embedded steel plate 2, a tetrafluoroethylene plate 3, an upper embedded steel plate 4 and a sliding part 5. When construction fixed part 1, do not form the levelness of pre-buried steel sheet 2 under with the spirit level measurement before the concrete strength of fixed part 1, through the levelness of pre-buried steel sheet 2 under the mode adjustment of local strike or jack-up, reach the temporary fixation after the design requirement.
In the adjusting method, the steel plate has high rigidity, and the measuring points interfere with each other, so that the levelness of the whole lower embedded steel plate 2 is difficult to adjust, and the central part of the lower embedded steel plate 2 is not reliably supported, so that the steel plate is not supported and separated due to the shrinkage of concrete in the concrete strength forming process, and the steel plate is seriously deformed after being loaded, the sliding resistance of the later-stage sliding support is increased, the sliding is difficult, the sliding effect is poor, and the test accuracy is seriously influenced.
Disclosure of Invention
In order to overcome the defects that the levelness of the sliding surface of the existing sliding support is difficult to control, the sliding resistance is large, and a sliding platform is difficult to slide, the invention provides a reinforced concrete sliding support which can accurately control the levelness of the sliding surface.
In order to achieve the purpose, the invention provides the following technical scheme:
the utility model provides a reinforced concrete sliding support, includes fixed part, goes up pre-buried steel sheet, tetrafluoroethylene board and sliding part down, pre-buried steel sheet down with be provided with the leveling layer between the fixed part, pre-buried anchor bar under having a plurality of in the fixed part, the one end of anchor bar extends down the fixed part is used for right the elevation of pre-buried steel sheet is fixed a position and temporarily fixed down.
Through the technical scheme, the lower anchor bars are pre-embedded in the fixing parts, and one ends of the lower anchor bars fixedly support the lower embedded steel plates, so that the support strength of the lower embedded steel plates is improved; the anchor bars carry out the correction support to a plurality of positions of pre-buried steel sheet down under a plurality of to the levelness of the pre-buried steel sheet of accurate control to used leveling layer and lower anchor bar, can keep the levelness of pre-buried steel sheet for a long time, ensured that the sliding part slides with the relative fixed part of less resistance all the time.
Furthermore, one end of the lower anchor bar is embedded in the fixing part and is in a hook shape, and the other end of the lower anchor bar extends out of the fixing part and is in a straight shape.
Through above-mentioned technical scheme, be favorable to increasing down the pre-buried length in the fixed part of anchor muscle, improve the pre-buried fixed strength of anchor muscle down then.
Furthermore, one end, extending out of the fixing portion, of the lower anchor rib is provided with a threaded section, a plurality of through holes are formed in the lower embedded steel plate in a penetrating mode, the threaded section penetrates through the through holes, the end portion of the threaded section is welded and fixed to the upper surface of the lower embedded steel plate, and a lower nut used for adjusting the standard height of the lower embedded steel plate is connected to the threaded section below the lower embedded steel plate in a threaded mode.
Through above-mentioned technical scheme, lower nut threaded connection is in the below of pre-buried steel sheet down, further improves the support to pre-buried steel sheet down.
Furthermore, the diameter of the through hole is 1-2 mm larger than that of the threaded section.
Through above-mentioned technical scheme, prevent effectively that pre-buried steel sheet from sliding on the horizontal plane down and changing its self position.
Furthermore, an upper anchor bar is embedded in the sliding part, and the upper embedded steel plate is horizontally fixed on the lower surface of the sliding part through the upper anchor bar.
Through above-mentioned technical scheme, utilize the anchor bar, the intensity of pre-buried steel sheet fixing on the lower surface of sliding part on the reinforcing.
Furthermore, the leveling layer is a cast-in-place concrete layer, and the part of the lower anchor bar between the lower embedded steel plate and the fixing part is embedded in the leveling layer.
Through above-mentioned technical scheme, the anchor bar under leveling layer buries in advance can keep the levelness of pre-buried steel sheet for a long time, ensures that the relative fixed part of sliding part with less resistance slides all the time.
A construction method of a reinforced concrete sliding support comprises the following steps:
and 11, placing an upper embedded steel plate above the tetrafluoroethylene plate, welding an anchor bar on the side surface of the upper embedded steel plate far away from the lower embedded steel plate, and pouring concrete to form a sliding part.
Through the technical scheme, the lower anchor bars are pre-embedded in the fixing parts, and one ends of the lower anchor bars fixedly support the lower embedded steel plates, so that the support strength of the lower embedded steel plates is improved; the anchor bars carry out the correction support to a plurality of positions of pre-buried steel sheet down under a plurality of to the levelness of the pre-buried steel sheet of accurate control to used leveling layer and lower anchor bar, can keep the levelness of pre-buried steel sheet for a long time, ensured that the sliding part slides with the relative fixed part of less resistance all the time.
Further, in step 5, the fine tuning step is: and observing the elevation of the through hole of the lower embedded steel plate by using a total station, and finely adjusting the lower nut from the gap between the lower embedded steel plate and the concrete by using a long-handled wrench when the elevation is different from the design value, so that the elevation of the through hole of the lower embedded steel plate is consistent with the design value.
Through above-mentioned technical scheme, utilize down nut threaded connection under on the anchor bar, the elevation of pre-buried steel sheet through-hole department conforms to with the design value under the adjustment, utilizes a plurality of position, keeps the levelness of pre-buried steel sheet.
Further, in step 6, the fine adjustment sequence of the hole positions is gradually performed from the center of the lower embedded steel plate to the periphery.
Through the technical scheme, the stress of the deformed lower embedded steel plate is easy to release.
Further, in step 8, the upper nut is removed from the center position in a sequence of gradually proceeding to the periphery.
Through the technical scheme, the internal stress generated in the lower embedded steel plate in the dismantling operation is favorably reduced.
Compared with the prior art, the invention has the beneficial effects that:
(1) the lower anchor bars are pre-embedded in the fixing parts, and one ends of the lower anchor bars fixedly support the lower pre-embedded steel plates, so that the support strength of the lower pre-embedded steel plates is improved;
(2) correcting and supporting a plurality of point positions of the lower embedded steel plate through a plurality of lower anchor bars, and accurately controlling the levelness of the embedded steel plate;
(3) through filling the leveling layer, the anchor bar is pre-buried, the levelness of the pre-buried steel plate can be kept for a long time, and the sliding part is ensured to slide with a relatively small resistance relative to the fixing part all the time.
Drawings
FIG. 1 is a schematic view of a prior art sliding support;
FIG. 2 is a schematic structural view of the present invention;
FIG. 3 is a schematic view of the construction of the lower anchor bar of the present invention;
FIG. 4 is a schematic structural view of a lower pre-buried steel plate according to the present invention;
FIG. 5 is a schematic view of the construction of the upper tendon in the present invention;
FIG. 6 is a schematic structural view of an upper pre-buried steel plate according to the present invention;
FIG. 7 is a schematic view of a connection structure of an upper pre-buried steel plate and an upper anchor bar according to the present invention;
FIG. 8 is a schematic view of a connection structure of the lower pre-buried steel plate, the lower anchor bar and the fixing portion in the construction process of the present invention;
FIG. 9 is a schematic view of the construction step of step 1 in the present invention;
FIG. 10 is a schematic view of the construction step of step 2 in the present invention;
FIG. 11 is a schematic view of the construction step of step 3 in the present invention;
FIG. 12 is a schematic view of the construction step of step 4 in the present invention;
FIG. 13 is a schematic view of the construction steps of step 5 and step 6 of the present invention;
FIG. 14 is a schematic view of the construction step of step 7 in the present invention;
FIG. 15 is a schematic view of the construction steps of step 8 and step 9 of the present invention;
FIG. 16 is a schematic illustration of the construction steps of step 10 of the present invention;
FIG. 17 is a schematic view of the construction process of step 11 in the present invention.
Reference numerals: 1. a fixed part; 2. lower pre-buried steel plates; 3. a tetrafluoroethylene sheet; 4. steel plates are pre-embedded; 5. a sliding part; 6. lower anchor bars; 7. a leveling layer; 8. anchor bars are arranged; 9. a lower nut; 10. screwing a nut; 11. a through hole; 12. side mould; 13. a positioning frame; 14. a void; 15. a long-handled wrench; 16. a threaded segment.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
The utility model provides a reinforced concrete sliding support, as shown in fig. 2, include the sliding part 5 that sets gradually from the top down, go up pre-buried steel sheet 4, tetrafluoroethylene board 3, pre-buried steel sheet 2 and fixed part 1 down, it is provided with leveling layer 7 to fill between pre-buried steel sheet 2 and the fixed part 1 down, leveling layer 7, fixed part 1 and sliding part 5 are formed by concrete placement, pre-buried in the fixed part 1 has a plurality of lower anchor bars 6, the one end of lower anchor bar 6 extends fixed part 1 and is provided with screw means, be used for fixing a position and the temporary fixation to the elevation of pre-buried steel sheet 2 down. Through the lower surface with a plurality of lower anchor bars 6's end fixing at pre-buried steel sheet 2 down, the realization is fixed to the support of a plurality of positions on the pre-buried steel sheet 2 down, effectively avoids because pre-buried steel sheet 2 warp down, ensures that sliding part 5 slides with less relative fixed part 1 of resistance.
As shown in fig. 2 and 3, one end of the lower anchor bar 6 is provided with a hook, the other end of the lower anchor bar is in a straight state and is provided with a fine thread to form a thread section 16, as shown in fig. 2 and 4, the lower embedded steel plate 2 is a common rolled steel plate with a plurality of holes, the holes on the lower embedded steel plate 2 are through holes 11, the number of the holes is consistent with that of the lower anchor bar 6, the positions of the through holes 11 are consistent with the center of the thread section 16, the end part of the thread section 16 is welded and fixed on the upper surface of the lower embedded steel plate 2, the radius of the through holes 11 is consistent with the outer diameter of the thread section 16, and the movement of the. The lower anchor bars 6 are embedded in the leveling layer 7 at the part between the lower embedded steel plate 2 and the fixing part 1.
Threaded connection has lower nut 9 on the screw thread section 16, and one side butt of lower nut 9 supports lower pre-buried steel sheet 2 for pre-buried steel sheet 2 under the regulation ensures that pre-buried steel sheet 2 is in horizontal position down, and in the normal use process, the support intensity of pre-buried steel sheet 2 under the further reinforcing.
An upper anchor bar 8 is pre-buried in the sliding part 5, the upper embedded steel plate 4 is fixed on the lower surface of the sliding part 5 through the upper anchor bar 8, one end of the upper anchor bar 8 is pre-buried in the sliding part 5, the other end of the upper embedded steel plate 4 is welded and fixed on one side of the upper embedded steel plate, and the tetrafluoroethylene plate 3 is arranged between the upper embedded steel plate 4 and the lower embedded steel plate 2.
The upper anchor bar 8 has a hook at the upper end and a straight lower end as shown in fig. 5. As shown in fig. 6 and 7, the upper pre-buried steel plate 4 is a common rolled steel plate with a plurality of holes, the number of the holes is the same as that of the upper anchor bars 8, and the size of the holes is the same as that of the diameter of the upper anchor bars 8.
A construction method of a reinforced concrete sliding support comprises the following steps:
and 5, as shown in fig. 8 and 13, observing the elevation of the through hole 11 of the lower embedded steel plate 2 by using a total station, and finely adjusting the lower nut 9 from the gap between the lower embedded steel plate 2 and the concrete by using a long handle wrench 15 when the elevation is different from the design value, so that the elevation of the through hole 11 of the lower embedded steel plate 2 is consistent with the design value.
And 6, after fine adjustment is completed, fixing a lower nut 9 by using a long-handle wrench 15, installing an upper nut 10 above the lower embedded steel plate 2 and screwing, and performing temporary fixing on the upper nut 10 immediately after fine adjustment of one hole site is completed, and then performing fine adjustment on other positions. The fine adjustment sequence is from the center of the lower embedded steel plate 2 to the periphery gradually until the completion of the whole process.
and 8, as shown in fig. 15, after the strength of the concrete reaches 5MPa, removing the upper nuts 10, immediately etching the through holes 11 to plug-weld the lower anchor bars 6 and the lower embedded steel plates 2, and removing the upper nuts 10 at other positions one by one after the plug-weld is completed and performing plug-weld. The sequence of removing the upper nut 10 is from a central position and gradually goes around.
In summary, the following steps:
when the invention is used, the lower anchor bars 6 are pre-embedded in the fixing parts 1, one ends of the lower anchor bars 6 fixedly support the lower pre-embedded steel plates 2, and the support strength of the lower pre-embedded steel plates 2 is improved; correcting and supporting a plurality of point positions of the lower embedded steel plate 2 through a plurality of lower anchor bars 6, and accurately controlling the levelness of the embedded steel plate; through filling the leveling layer 7, the anchor bars 6 are embedded, the levelness of the embedded steel plate can be kept for a long time, and the sliding part 5 is ensured to slide relative to the fixing part 1 with small resistance all the time.
The embodiments of the present invention are preferred embodiments of the present invention, and the scope of the present invention is not limited by these embodiments, so: all equivalent changes made according to the structure, shape and principle of the invention are covered by the protection scope of the invention.
Claims (10)
1. The utility model provides a reinforced concrete sliding support, includes fixed part (1), goes up pre-buried steel sheet (4), pre-buried steel sheet (2), tetrafluoroethylene board (3) and sliding part (5) down, its characterized in that, pre-buried steel sheet (2) down with be provided with between fixed part (1) leveling layer (7), pre-buried in fixed part (1) has a plurality of lower anchor bars (6), the one end of anchor bar (6) is extended down fixed part (1) is used for right the elevation of pre-buried steel sheet (2) is fixed a position and temporary fixation down.
2. The sliding support of reinforced concrete as claimed in claim 1, wherein one end of said lower anchor bar (6) is pre-embedded in said fixing portion (1) and configured as a hook, and the other end extends out of said fixing portion (1) and configured as a straight shape.
3. The reinforced concrete sliding support according to claim 2, wherein one end of the lower anchor bar (6) extending out of the fixing portion (1) is provided with a threaded section (16), the lower embedded steel plate (2) is provided with a plurality of through holes (11) in a penetrating manner, the threaded section (16) is arranged in the through holes (11) in a penetrating manner, the end of the threaded section (16) is welded and fixed on the upper surface of the lower embedded steel plate (2), and the threaded section (16) is in threaded connection with a lower nut (9) used for adjusting the elevation of the lower embedded steel plate (2) below the lower embedded steel plate (2).
4. A sliding bearing of reinforced concrete according to claim 3, characterized in that the diameter of said through hole (11) is 1-2 mm larger than the diameter of said threaded section (16).
5. A sliding bearing of reinforced concrete according to claim 1, characterized in that the sliding part (5) is embedded with upper anchor bars (8), and the upper embedded steel plates (4) are horizontally fixed on the lower surface of the sliding part (5) through the upper anchor bars (8).
6. A reinforced concrete sliding support according to claim 1, wherein said levelling layer (7) is a cast-in-place concrete layer, and the part of said lower anchor bars (6) between said lower embedded steel plate (2) and said fixing part (1) is embedded in said levelling layer (7).
7. A construction method of a reinforced concrete sliding support is characterized by comprising the following steps:
step 1, erecting a formwork, binding steel bars of a fixing part (1), temporarily fixing a lower anchor bar (6) by using a positioning frame (13), finishing the plane positioning of the lower anchor bar (6) by arranging the positioning frame (13) above the lower anchor bar (6), arranging a hook part of the lower anchor bar (6) below, and inserting a straight end into the positioning frame (13);
step 2, pouring concrete of the fixed part (1) of the sliding support;
step 3, when the strength of the concrete reaches 5MPa, removing the positioning frame (13), mounting lower nuts (9) at the tops of the lower anchor bars (6), and coarsely adjusting the lower nuts (9) to enable the upper surfaces of all the nuts to be located at the same elevation;
step 4, placing the lower embedded steel plate (2), keeping all the lower anchor bars (6) to penetrate through holes (11) of the lower embedded steel plate (2), and placing the lower embedded steel plate (2) on the upper surface of a lower nut (9);
step 5, finely adjusting the position of the lower embedded steel plate (2) to enable the elevation of the through hole (11) of the lower embedded steel plate (2) to be consistent with a design value;
step 6, after fine adjustment is completed, fixing a lower nut (9), installing an upper nut (10) above the lower embedded steel plate (2), screwing, completing fine adjustment of a hole site, and immediately temporarily fixing the upper nut (10);
step 7, after all fine adjustments are completed, a side die (12) is supported in a gap (14) between the lower embedded steel plate (2) and the concrete, and self-leveling concrete is poured in the gap (14) through a through hole (11) of the lower embedded steel plate (2) and is vibrated to be compact;
step 8, after the strength of the concrete reaches 5MPa, removing an upper nut (10), immediately performing plug welding on the corresponding lower anchor bar (6) and the lower embedded steel plate (2), and after the plug welding is completed, removing the upper nuts (10) at other positions one by one and performing plug welding at corresponding positions;
step 9, after all plug welding is finished, cutting off the part of the lower anchor bar (6) higher than the lower embedded steel plate (2), and polishing the plug welding position to keep the plug welding position smooth;
step 10, placing a tetrafluoroethylene plate (3) on the upper surface of the lower embedded steel plate (2), and smearing butter;
and 11, placing an upper embedded steel plate (4) above the tetrafluoroethylene plate (3), welding an upper anchor bar (8) on the side surface, far away from the lower embedded steel plate (2), of the upper embedded steel plate (4), and pouring concrete to form a sliding part (5).
8. The construction method of the reinforced concrete sliding support according to claim 7, wherein in the step 5, the fine adjustment step comprises: the elevation of the through hole (11) of the lower embedded steel plate (2) is observed by using a total station, and when the elevation is different from the design value, the lower nut (9) is finely adjusted from the gap between the lower embedded steel plate (2) and concrete by using a long-handled wrench, so that the elevation of the through hole (11) of the lower embedded steel plate (2) is consistent with the design value.
9. The construction method of the reinforced concrete sliding support according to claim 7, wherein in the step 6, the fine adjustment sequence of the hole positions is gradually performed from the center of the lower embedded steel plate (2) to the periphery.
10. A method for constructing a reinforced concrete sliding bearing according to claim 7, wherein in step 8, the sequence of removing the upper nuts (10) is performed gradually from the central position to the periphery.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911141569.9A CN110886396A (en) | 2019-11-20 | 2019-11-20 | Reinforced concrete sliding support and construction method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911141569.9A CN110886396A (en) | 2019-11-20 | 2019-11-20 | Reinforced concrete sliding support and construction method thereof |
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| CN110886396A true CN110886396A (en) | 2020-03-17 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111502028A (en) * | 2020-03-23 | 2020-08-07 | 中建五局第三建设有限公司 | Wall-following multipoint sliding support structure, concrete annular platform and support method |
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2019
- 2019-11-20 CN CN201911141569.9A patent/CN110886396A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111502028A (en) * | 2020-03-23 | 2020-08-07 | 中建五局第三建设有限公司 | Wall-following multipoint sliding support structure, concrete annular platform and support method |
| CN111502028B (en) * | 2020-03-23 | 2022-04-12 | 中建五局第三建设有限公司 | Wall-following multipoint sliding support structure, concrete annular platform and support method |
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