CN217419647U - Prestress applying structure and foundation pit beam string steel pull rod prestress applying node - Google Patents
Prestress applying structure and foundation pit beam string steel pull rod prestress applying node Download PDFInfo
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- CN217419647U CN217419647U CN202220218989.3U CN202220218989U CN217419647U CN 217419647 U CN217419647 U CN 217419647U CN 202220218989 U CN202220218989 U CN 202220218989U CN 217419647 U CN217419647 U CN 217419647U
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Abstract
The utility model relates to a prestress applying structure and a prestress applying node of a steel pull rod of a string beam of a foundation pit, wherein the prestress applying structure comprises a first connecting main body, a second connecting main body and at least two sets of locking components; the first connecting body and the second connecting body are oppositely arranged; the first connecting body is provided with at least one first through hole and at least two limiting grooves, the second connecting body is provided with at least one second through hole and at least two limiting plates, the first through holes and the second through holes correspond to each other one by one, the limiting plates correspond to the limiting grooves one by one, and the limiting plates are connected with the limiting grooves in a sliding manner; limiting plate, spacing groove and the cooperation of second connecting body enclose into at least two vertical grooves that can follow limiting plate slip direction and adjust the width, this vertical groove of locking subassembly locking. The utility model discloses simple structure easily makes, has sufficient rigidity and intensity, and the installation is all very convenient with the dismantlement, and occupation space is small moreover, can reduce the prestressing force application number of times that the string roof beam was opened to the foundation ditch, and it is more convenient to be under construction.
Description
Technical Field
The utility model relates to a string roof beam technical field is opened to foundation ditch steel shotcrete especially relates to a prestressing force is applyed structure and foundation ditch and is opened string roof beam steel pull rod prestressing force and apply node.
Background
In order to ensure the safety of the construction of the underground structure and the surrounding environment of the foundation pit, the side wall and the surrounding environment of the foundation pit need to be protected by adopting retaining and reinforcing measures. In deep foundation pit engineering of high-rise buildings and subway construction, most of the deep foundation pit engineering is excavated in cities, various structures such as traffic main roads, built buildings or pipelines and the like usually exist around the foundation pit, and in order to ensure the safety of the surrounding environment of the foundation pit, save the construction period and the cost, the steel structure truss inner support system is widely applied.
In the prior art, the foundation pit steel support beam string adopts the stay bar prestressing force applying device, and the following defects exist: 1) the construction speed is low due to the fact that the number of the stay bars of the large-span beam string is large and the number of times of applying prestress is large; 2) the large-span beam string bracing members are large in number, and the number of jack equipment is limited, so that prestress cannot be simultaneously applied to the plurality of bracing members, the prestress is unevenly applied, and the stability of a foundation pit is not facilitated; 3) the strut prestress applying device is heavy in self weight, inconvenient to install and high in manufacturing cost.
SUMMERY OF THE UTILITY MODEL
To current foundation ditch steel shotcrete beam adopt vaulting pole prestressing force to apply the device construction speed slow, need use numerous jacks of quantity, the big and high problem of cost of dead weight, an object of the utility model is to provide a prestressing force is applyed structure and foundation ditch string beam steel pull rod prestressing force and is applyed the node, and its simple structure has sufficient rigidity and intensity, and loading and unloading are convenient, and occupation space is small, and the number of times is applyed to the prestressing force of reduction foundation ditch string beam that moreover can, and it is more convenient to be under construction.
In order to achieve the purpose, the utility model adopts the technical proposal that:
a prestress applying structure comprises a first connecting body, a second connecting body and at least two sets of locking assemblies.
The first connecting body and the second connecting body are arranged oppositely, and a jack placing plate is arranged on the first connecting body or the second connecting body; the connecting structure is characterized in that the first connecting body is provided with at least one first through hole and at least two limiting grooves, the second connecting body is provided with at least one second through hole and at least two limiting plates, the first through holes correspond to the second through holes in a one-to-one mode, and the limiting plates correspond to the limiting grooves in a one-to-one mode and are connected with the limiting grooves in a sliding mode.
Limiting plate, spacing groove and the cooperation of second connecting body enclose into at least two vertical grooves that can follow limiting plate slip direction and adjust the width, this vertical groove of locking subassembly locking.
Preferably, the quantity of limiting plate is four at least, and each spacing groove corresponds two limiting plates, and the spacing groove is arranged in between two limiting plates, and one of two limiting plates sliding connection is in the spacing inslot.
Preferably, a first limiting hole is formed in the limiting plate, a second limiting hole is formed in the limiting groove, and a limiting bolt is connected between the first limiting hole and the second limiting hole; the first limiting hole and/or the second limiting hole are/is long round holes.
Preferably, the locking assembly comprises at least one wedge and at least one feeler, and the vertical groove is internally provided with a slope complementary to the wedge.
Preferably, the inclined surface is arranged at a position where the second connecting body is opposite to the vertical groove.
Or at least two inclined plane plates are arranged on the first connecting main body and are perpendicular to the first connecting main body; the inclined plane is arranged on the side surface of the inclined plane plate facing the second connecting main body; the inclined plane plate is provided with an upper limiting plate and a lower limiting plate, and the upper limiting plate, the lower limiting plate and the inclined plane plate are matched to enclose the limiting groove.
Preferably, the feeler is provided with a barb for preventing falling off.
Preferably, a guard plate for preventing the jack from falling off is further arranged on the jack placing plate.
Furthermore, the utility model also discloses a node is applyed to foundation ditch string beam steel pull rod prestressing force, it includes concrete beam, steel pull rod and above-mentioned arbitrary item prestressing force apply the structure.
The anti-bracket is arranged on the concrete beam, one end of the steel pull rod is embedded in the concrete beam, the other end of the steel pull rod is connected with the end part of the beam string, and the steel pull rod stretches out from the anti-bracket and penetrates through the first through hole and the second through hole to be connected with the second connecting body through bolts.
Preferably, an embedded sleeve is further arranged in the concrete beam, and the steel pull rod penetrates through the embedded sleeve and then extends out of the anti-corbel.
Preferably, the reverse bracket is provided with a secondary grouting layer, and the first connecting main body is fixedly connected with the reverse bracket through the secondary grouting layer.
After adopting above-mentioned scheme, make first connecting body and second connecting body only can remove along the direction relative to each other through limiting plate and gag lever post cooperation, the board is placed to the jack is used for placing the jack, supports tight first connecting body and second connecting body through the jack and applys prestressing force. The locking work of the relative displacement of the first connecting body and the second connecting body after prestress is applied is realized through the locking assembly locking vertical groove. The utility model discloses simple structure easily makes, has sufficient rigidity and intensity, and the installation is all very convenient with the dismantlement, and occupation space is small moreover. In addition, through carrying out prestressing force to the pre-buried steel pull rod to the beam string tip and applying, compare in applying prestressing force to the beam string stay, can reduce the prestressing force application number of times of foundation ditch beam string, it is more convenient to construct, does benefit to reduction of erection time.
Drawings
FIG. 1 is a schematic view of a prestressing force applying structure;
FIG. 2 is a schematic view of a first connecting body;
FIG. 3 is a schematic view of a second connecting body;
FIG. 4 is a schematic view of a vertical slot;
FIG. 5 is a schematic view of a wedge;
FIG. 6 is a schematic view of a feeler gauge;
fig. 7 is a schematic diagram of a foundation pit beam string steel tie bar prestress application node.
Description of the reference symbols:
a first connecting body 10, a first through hole 11, a jack placing plate 12, a guard plate 13, a slant plate 14, an upper limit plate 15, a lower limit plate 16, a slant 17, a second limit hole 18, and a limit bolt 19;
the connecting structure comprises a second connecting main body 20, a second through hole 21, a limiting plate 22, a first limiting hole 23 and a vertical groove 24;
wedge 31, feeler 32, barb 33;
the concrete beam 40, the inverted bracket 41, the embedded sleeve 42 and the secondary grouting layer 43;
a steel tie rod 50;
a jack 60.
Detailed Description
As shown in fig. 1 to 6, the present invention discloses a prestressing force applying structure, which includes a first connecting body 10, a second connecting body 20, and two sets of locking assemblies.
Three first through holes 11, two jack placing plates 12 and two inclined plane plates 14 are arranged on the first connecting body 10, and the three first through holes 11 are arranged side by side in the vertical direction and are used for the steel pull rod 50 to pass through. The two jack placing plates 12 are used for placing the jacks 60, and guard plates 13 used for placing the jacks 60 to fall are further arranged on the outer sides of the jack placing plates 12. This arrangement allows the jack 60 to be securely positioned when pre-stressing on site, ensuring construction safety. Two inclined plane boards 14 are arranged between the two jack placing boards 12, the two inclined plane boards 14 are arranged in parallel, an upper limit board 15 and a lower limit board 16 which are parallel to each other are arranged on the inclined plane boards 14, the upper limit board 15, the lower limit board 16 and the inclined plane boards 14 are matched to enclose a limit groove, and notches of the two limit grooves are arranged oppositely or back to back.
The second connecting body 20 and the first connecting body 10 are arranged oppositely, three second through holes 21 and four limiting plates 22 are arranged on the second connecting body 20, and the arrangement positions of the second through holes 21 are in one-to-one correspondence with the first through holes 11. The two limiting plates 22 are a set and correspond to a limiting groove, the two limiting plates 22 clamp the inclined plane plate 14, and one of the two limiting plates 22 is slidably connected in the limiting groove, so that the second connecting body 20 can only move along the direction opposite to the first connecting body 10. The two limiting plates 22 correspond to one limiting groove, so that the connection relation is more reliable, and meanwhile, the forming of the vertical groove 24 and the installation of the locking part are facilitated. In order to prevent the first connecting body 10 and the second connecting body 20 from falling off during transportation, a first limiting hole 23 is formed in the limiting plate 22, a second limiting hole 18 is formed in the inclined plate 14 (at the bottom of the limiting groove), and a limiting bolt 19 is connected between the first limiting hole 23 and the second limiting hole 18. The first limiting hole 23 and the second limiting hole 18 are both oblong holes, and are matched with each other through the limiting bolt 19, the first limiting hole 23 and the second limiting hole 18, so that a large displacement space is provided, and the first connecting body 10 and the second connecting body 20 cannot fall off.
Limiting plate 22, inclined plane 17 groove and second connecting body 20 cooperate and enclose into two vertical grooves 24 that can follow limiting plate 22 slip direction and adjust the width, and the locking subassembly is used for locking this vertical groove 24. Specifically, the locking means comprises a wedge 31 and a plurality of feelers 32, the second connecting body 20 being provided with a ramp 17 complementary to the wedge 31 at a position facing the vertical recess 24, or the ramp 17 being provided with a ramp 17 complementary to the wedge 31 at the side of the recess of the ramp 17 facing the second connecting body 20, the feelers 32 being placed in the vertical recess 24 while applying a prestress and maintaining a pressure, the clearance between the feelers 32 and the ramps 17 then being filled with the wedge 31. In order to prevent the feeler 32 from being inadvertently dropped when it is placed, a drop-preventing barb 33 is provided on the top of the feeler 32.
Based on the same inventive concept, the utility model also discloses a foundation ditch string beam steel pull rod 50 prestressing force application node, as shown in fig. 7, it includes concrete beam 40, steel pull rod 50 and foretell prestressing force application structure.
An anti-corbel 41 is provided on the concrete beam 40, and a prestress applying structure is installed and fixed on the anti-corbel 41 through a secondary grouting layer 43. One end of the steel pull rod 50 is embedded in the concrete beam 40, and the other end is connected with the end part of the beam string. The steel tie rod 50 extends from the inverted bracket 41 after passing through the embedded sleeve 42 provided in the concrete beam 40, and then the steel tie rod 50 is bolted to the second connecting body 20 after passing through the first through hole 11 and the second through hole 21.
During specific installation, firstly, the prestress applying structure penetrates through the steel pull rod 50, then, the bolt is primarily locked after the distance of the secondary grouting layer 43 is reserved, then, formwork and grouting of the secondary grouting layer 43 are carried out, secondary locking of the bolt is carried out after the secondary grouting layer 43 is maintained to reach the design strength, after the installation of the beam string structure main body is completed, the jacks 60 are placed on the jack placing plate 12 when prestress is applied, the two jacks 60 simultaneously apply prestress, a plurality of clearance gauges 32 are placed in the vertical grooves 24 while pressure is maintained, then, gaps between the clearance gauges 32 and the inclined planes 17 are filled with the wedge blocks 31, finally, the jacks 60 reduce the pressure and move away, and the prestress application of the beam string steel pull rod 50 is completed.
The key point of the utility model is that, make first connecting body 10 and second connecting body 20 only can remove along the direction relative each other through limiting plate 22 and gag lever post cooperation, the board 12 is placed to the jack and is used for placing jack 60, supports tight first connecting body 10 and second connecting body 20 through jack 60 and applys prestressing force. The locking of the relative displacement of the first connecting body 10 and the second connecting body 20 after the prestressing is applied is achieved by the locking assembly locking vertical grooves 24. The utility model discloses simple structure easily makes, has sufficient rigidity and intensity, and the installation is all very convenient with the dismantlement, and occupation space is small moreover. In addition, through carrying out prestressing force application to the pre-buried steel pull rod 50 of stretch-string beam tip, compare in applying prestressing force to the stretch-string beam vaulting pole, can reduce the prestressing force application number of times of foundation ditch stretch-string beam, it is more convenient to construct, does benefit to reduction of erection time.
The above description is only an embodiment of the present invention, and is not intended to limit the technical scope of the present invention, so that any slight modifications, equivalent changes and modifications made by the technical spirit of the present invention to the above embodiments are all within the scope of the technical solution of the present invention.
Claims (10)
1. A prestress applying structure, characterized in that: the locking device comprises a first connecting main body, a second connecting main body and at least two sets of locking assemblies;
the first connecting body and the second connecting body are arranged oppositely, and a jack placing plate is arranged on the first connecting body or the second connecting body; the first connecting body is provided with at least one first through hole and at least two limiting grooves, the second connecting body is provided with at least one second through hole and at least two limiting plates, the first through holes and the second through holes correspond to each other one by one, the limiting plates correspond to the limiting grooves one by one, and the limiting plates are connected with the limiting grooves in a sliding manner;
limiting plate, spacing groove and second connecting body cooperate and enclose into two at least vertical grooves that can follow limiting plate slip direction and adjust the width, this vertical groove of locking subassembly locking.
2. A prestressing structure according to claim 1, wherein: the quantity of limiting plate is four at least, and each spacing groove corresponds two limiting plates, and the spacing groove is arranged in between two limiting plates, and one sliding connection in limiting groove in two limiting plates.
3. A prestressing structure according to claim 1, wherein: a first limiting hole is formed in the limiting plate, a second limiting hole is formed in the limiting groove, and a limiting bolt is connected between the first limiting hole and the second limiting hole; the first limiting hole and/or the second limiting hole are/is long round holes.
4. A prestressing structure according to claim 1, wherein: the locking assembly comprises at least one wedge block and at least one clearance gauge, and an inclined plane which is complementary with the wedge block is arranged in the vertical groove.
5. A prestressing structure according to claim 4, wherein: the inclined plane is arranged at the position, opposite to the vertical groove, of the second connecting main body;
or at least two inclined plane plates are arranged on the first connecting main body and are perpendicular to the first connecting main body; the inclined plane is arranged on the side surface of the inclined plane plate facing the second connecting main body; the inclined plane plate is provided with an upper limiting plate and a lower limiting plate, and the upper limiting plate, the lower limiting plate and the inclined plane plate are matched to enclose the limiting groove.
6. A prestressing structure according to claim 4, wherein: the feeler is provided with a barb for preventing falling.
7. A prestressing structure according to claim 1, wherein: still be equipped with the backplate that prevents the jack and drop on the board is placed to the jack.
8. The utility model provides a foundation ditch string roof beam steel pull rod prestressing force application node which characterized in that: comprising a concrete beam, a steel tie and a prestressing structure according to any one of claims 1 to 7;
the concrete beam is provided with a reverse bracket, one end of the steel pull rod is embedded in the concrete beam, the other end of the steel pull rod is connected with the end part of the beam string, and the steel pull rod extends out of the reverse bracket and penetrates through the first through hole and the second through hole to be connected with the second connecting body through bolts.
9. The foundation pit beam string steel pull rod prestress application node according to claim 8, characterized in that: and an embedded sleeve is further arranged in the concrete beam, and the steel pull rod penetrates through the embedded sleeve and then extends out of the anti-bracket.
10. The foundation pit beam string steel pull rod prestress application node according to claim 8, characterized in that: the first connecting body is fixedly connected with the reverse bracket through the secondary grouting layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220218989.3U CN217419647U (en) | 2022-01-26 | 2022-01-26 | Prestress applying structure and foundation pit beam string steel pull rod prestress applying node |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220218989.3U CN217419647U (en) | 2022-01-26 | 2022-01-26 | Prestress applying structure and foundation pit beam string steel pull rod prestress applying node |
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| CN217419647U true CN217419647U (en) | 2022-09-13 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117026996A (en) * | 2023-08-04 | 2023-11-10 | 中铁一局集团市政环保工程有限公司 | Assembly type string beam steel support construction process |
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- 2022-01-26 CN CN202220218989.3U patent/CN217419647U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117026996A (en) * | 2023-08-04 | 2023-11-10 | 中铁一局集团市政环保工程有限公司 | Assembly type string beam steel support construction process |
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