CN211873862U - Vertical prestressed pipe grouting structure of prestressed concrete roof beam - Google Patents
Vertical prestressed pipe grouting structure of prestressed concrete roof beam Download PDFInfo
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- CN211873862U CN211873862U CN202020021815.9U CN202020021815U CN211873862U CN 211873862 U CN211873862 U CN 211873862U CN 202020021815 U CN202020021815 U CN 202020021815U CN 211873862 U CN211873862 U CN 211873862U
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Abstract
The utility model relates to the field of building construction, in particular to a prestressed concrete beam vertical prestressed pipeline grouting structure, which comprises vertical prestressed tendons, anchoring pieces and a corrugated pipe, wherein the vertical prestressed tendons are sleeved in the corrugated pipe, the anchoring pieces are arranged at two ends of the vertical prestressed tendons, each anchoring piece comprises an anchorage device and an anchor backing plate, the prestressed concrete beam grouting structure also comprises a grouting pipe seat, one end part of the grouting pipe seat is hermetically fixed on the anchor backing plate, a position close to the anchor backing plate in the grouting pipe seat is provided with a limiting plate, the limiting plate is fixed on the inner wall of the grouting pipe seat, the corrugated pipe is sleeved in the grouting pipe seat, and its tip and limiting plate butt, sealed between another tip of slip casting tube socket and the bellows, seted up the slip casting hole on the slip casting tube socket, seted up on the bellows and crossed the thick liquid hole corresponding with the slip casting hole position, slip casting hole fixed connection slip casting steel pipe in department, slip casting steel pipe connection slip casting hose. The utility model discloses can effectively guarantee vertical prestressed pipe's slip casting effect.
Description
Technical Field
The utility model relates to a construction field, concretely relates to vertical prestressed pipe grouting structure of prestressed concrete roof beam.
Background
In the prestressed concrete bridge construction process, the vertical prestressed tendons need to be poured and finished in the beam body concrete, the prestress tensioning operation is carried out after the strength meets the requirement, then the vertical prestressed pipeline grouting is carried out, after the slurry strength meets the requirement, the prestress applied to the vertical prestressed tendons is transmitted to the pipeline through the slurry and then transmitted to the beam body, so that the stress distribution along the prestressed beam pipeline is realized, in order to ensure that the vertical prestress is uniformly distributed in the beam body along the pipeline, the lasting effect is achieved, the pipeline grouting after the vertical prestressed tendons are tensioned becomes very important, but the pipeline grouting effect is difficult to control all the time due to various reasons in the actual construction process, and the reason has the following aspects:
1. vertical pipeline design generally adopts thin wall metal corrugated pipe, and pipeline wall thickness is mostly 0.5mm, and under the bridge construction condition at present stage, metal welding is mostly artifical electric arc welding, and very easily burns out when vertical corrugated pipe wall is very thin, and slip casting mouth and pipeline welding are very difficult.
2. The corrugated pipe is easy to deform and bend due to the structure, and is easy to bend and break due to collision when being transported and installed after the pipeline grouting nozzle is welded, so that grouting cannot be performed in the later period.
3. The bellows is equally not good welded fastening with anchor backing plate contact position, and this department takes place to remove easily and cracks, and grout gets into stifled pipe behind the gap and causes the unable pipeline slip casting of later stage when concrete placement.
SUMMERY OF THE UTILITY MODEL
In order to solve the weak point among the above-mentioned background art, the utility model aims at providing a vertical prestressed pipe slip casting structure can effectively guarantee vertical prestressed pipe's slip casting effect.
In order to achieve the above object, the utility model adopts the following technical scheme: the vertical prestressed pipeline grouting structure comprises vertical prestressed tendons, anchoring pieces and a corrugated pipe, wherein the vertical prestressed tendons are sleeved in the corrugated pipe, the anchoring pieces are installed at two ends of the vertical prestressed tendons, each anchoring piece comprises an anchorage device and an anchor backing plate, the vertical prestressed pipelines further comprise a grouting pipe seat, one end of each grouting pipe seat is hermetically fixed on the anchor backing plate, a limiting plate is arranged in each grouting pipe seat and close to the anchor backing plate, the limiting plate is fixed on the inner wall of each grouting pipe seat, the corrugated pipe is sleeved in each grouting pipe seat, the end of each corrugated pipe seat is abutted against the limiting plate, the other end of each grouting pipe seat is hermetically connected with the corrugated pipe, grouting holes are formed in the grouting pipe seats, grouting holes corresponding to the grouting holes are formed in the corrugated pipe, and grouting steel pipes are fixedly connected at the grouting holes, the grouting steel pipe is connected with a grouting hose.
Furthermore, the limiting plates are four, and the four limiting plates are fixed on the inner wall of the grouting pipe seat at equal intervals.
Further, the limiting plate includes spacing portion and follows and is close to the wedge portion that the direction of anchor backing plate widens gradually, the top surface of wedge portion with the bottom surface fixed connection of spacing portion, the bellows with the bottom surface butt of spacing portion.
Furthermore, a spiral reinforcing rib is further fixed at the bottom of the anchor backing plate and sleeved outside the grouting pipe seat.
Furthermore, one end part of the grouting pipe seat is welded on the anchor backing plate in an annular sealing mode.
Further, the other end of the grouting pipe seat and the corrugated pipe are sealed through an adhesive tape.
Further, the corrugated pipe is a galvanized metal corrugated pipe or an iron sheet pipe.
Further, the diameter of slip casting base is 10 ~ 20mm bigger than the diameter of bellows.
Furthermore, the grouting hose is a PE steel wire mesh framework pipe.
Further, the vertical prestressed tendons are finish-rolled twisted steel bars.
Implement the utility model discloses following beneficial effect has:
1. the anchor backing plate, the grouting pipe seat and the grouting steel pipe can be firmly welded, and can not fall off or crack in the subsequent processes of carrying, mounting and concrete pouring, so that the problem of pipe blockage caused by slurry feeding of the pipeline is solved;
2. the grouting pipe seat can protect the metal corrugated pipe from bending and breaking, and the problem that the corrugated pipe is blocked by grouting after the corrugated pipe is slotted can be avoided;
3. the position of the corrugated pipe in the grouting pipe seat is well controlled by the limiting plate, smooth grouting of the grouting hole of the pipeline is guaranteed, and the corrugated pipe can bear certain axial pressure after the anchorage device is screwed down to protect the integrity of pipeline installation.
4. The grouting hose adopts a PE steel wire mesh framework pipe, has good radial bearing force, is easy to bend, is convenient to install, and can prevent subsequent grouting failure caused by flattening during concrete pouring.
5. During pipeline grouting, grout sequentially passes through the PE steel wire mesh framework pipe at the lower end, the grouting steel pipe and the grouting pipe seat, then enters from the bottom opening of the metal corrugated pipe, and is injected into the pipeline from the bottom upwards, and gas in the pipeline is discharged from the PE steel wire mesh framework pipe at the top end.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Wherein: fig. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is a schematic view of the assembly of the components of the upper part of the grouting structure;
FIG. 3 is an assembled view of the components of FIG. 2;
FIG. 4 is a top assembly schematic view of a vertical pre-stressed pipe grouting structure;
in the figure: the concrete grouting structure comprises an anchor device 1, an anchor backing plate 2, a grouting pipe seat 3, a corrugated pipe 4, a grouting steel pipe 5, an adhesive tape 6, a vertical prestressed rib 7, a grouting hose 8, a limiting plate 9 and a spiral reinforcing rib 10.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
Example (b):
the vertical prestressed pipe grouting structure of the prestressed concrete beam shown in the attached drawing 1 comprises vertical prestressed tendons 7, anchoring pieces, a corrugated pipe 4 and a grouting pipe seat 3, wherein the vertical prestressed tendons 7 are sleeved in the corrugated pipe 4, the anchoring pieces are installed at two ends of the vertical prestressed tendons 7 and comprise an anchorage device 1 and an anchor backing plate 2, one end part of the grouting pipe seat 3 is vertically and centrally welded with the anchor backing plate 2, and the joint of the vertical prestressed tendons and the anchor backing plate is required to be sealed so as to avoid slurry leakage. Position department that is close to anchor backing plate 2 in grouting tube socket 3 sets up limiting plate 9, limiting plate 9 is fixed in grouting tube socket 3's inner wall, 4 suit of bellows are in grouting tube socket 3, and its tip and the butt of limiting plate 9, seal through the mode of winding sticky tape 6 between another tip of grouting tube socket 3 and the bellows 4, sticky tape 6 can adopt ordinary wide sticky tape, seal the gap between grouting tube socket 3 and the bellows 4 through the winding, cement thick liquid gets into the gap stifled pipe when preventing concreting. The grouting pipe seat 3 is provided with a grouting hole, the corrugated pipe 4 is provided with a grouting hole corresponding to the grouting hole, one end of the grouting steel pipe 5 is connected with the grouting hole, and the other end of the grouting steel pipe is connected with the grouting hose 8.
In another embodiment, preferably, the limiting plates 9 are provided with four blocks, and the four limiting plates 9 are fixed on the inner wall of the grouting pipe base 3 at equal intervals. The limiting plate comprises a limiting part and a wedge-shaped part gradually widened along the direction close to the anchor backing plate, the top surface of the wedge-shaped part is fixedly connected with the bottom surface of the limiting part, and the corrugated pipe 4 is abutted to the bottom surface of the limiting part. The limiting plate 9 is made of a steel plate with the thickness of more than 3mm, and the limiting plate 9 has the first function of keeping the vertical distance between the pipe orifice of the corrugated pipe 4 and the anchor backing plate 2 to be more than 20mm, so that the pipe orifice of the corrugated pipe 4 is prevented from propping against the anchor backing plate 4, and slurry cannot pass through; the second function is to control the position of the corrugated pipe 4 through the wedge-shaped part, so that the pipe wall of the corrugated pipe 4 and the inner wall of the grouting steel pipe 5 keep a gap of more than 5mm, and the slurry can pass through the gap.
In another embodiment, preferably, the bottom of the anchor backing plate 2 is further fixed with a spiral reinforcing rib 10, and the spiral reinforcing rib 10 is sleeved outside the grouting pipe seat 3 and used for preventing the anchor backing plate 3 from sinking and restraining concrete deformation at the lower part of the anchor backing plate 3 during tensioning.
In another embodiment, the corrugated pipe 4 is a galvanized metal corrugated pipe or an iron sheet pipe, and during installation, round holes with the diameter not less than 20mm are formed at two ends inserted into the grouting pipe base 3 to serve as grout passing holes, so that grout can flow into the corrugated pipe 4 from the grouting pipe base 3. The diameter of the grouting base 3 is 10-20 mm larger than that of the corrugated pipe 4, the wall thickness of the grouting base is more than 2.5mm, the corrugated pipe 4 is tightly propped against the limiting block 9 after being inserted into the grouting pipe seat 3, and a gap not smaller than 5mm is formed between the corrugated pipe 4 and the grouting steel pipe 5 so as to facilitate the passing of grout; the wall thickness of the steel pipe of the grouting pipe seat 3 needs to meet the requirement of on-site welding of workers or unified processing and manufacturing of factories; the length of the spiral reinforcing rib is required to meet the requirement that the spiral reinforcing rib 10 is installed and is not less than 10 cm. A circular hole with the diameter not less than 15mm needs to be formed in the grouting pipe seat to serve as a grouting hole, and the distance between the grouting hole and the anchor backing plate is more than 5 cm. The outer diameter of the grouting steel pipe 5 is convenient for the installation of the spiral reinforcing rib 10, and the inner diameter of the grouting steel pipe is not less than 15mm, so that the grouting steel pipe is beneficial to the passing of slurry; the wall thickness needs to meet the requirement of field welding of workers or unified processing and manufacturing of factories, generally not less than 2.5mm, the length of the grouting steel pipe 5 is convenient to be connected with the grouting hose 8, and the length is not suitable to be less than 10 cm. The grouting steel pipe 5 and the grouting hose 8 are connected in a nested mode and are screwed down through binding wires after connection, and therefore falling is prevented. The grouting hose 8 is made of a PE steel wire mesh framework pipe, or other hoses with certain radial strength can be adopted, the inner diameter of the grouting hose 8 is consistent with the outer diameter of the grouting steel pipe 5, and after the vertical prestressed pipeline grouting structure is installed, the bottom grouting hose 8 is led out of the concrete surface from the bottom plate chamfer in the beam to a certain height; the top grouting hose 8 is led out of the concrete surface from the top of the beam to a certain height. Measures are needed to be taken to seal the hose opening before beam concrete pouring so as to prevent sundries from entering the blocking pipe, and the sealing is opened for grouting before grouting. The vertical prestressed tendons are finish-rolled threaded steel bars, are usually 25mm and 32mm in diameter, and are matched with an anchorage device and an anchor backing plate for use.
The concrete application process of the vertical prestressed pipeline grouting structure is as follows:
1. the vertical prestressed tendon anchorage devices of the same prestressed concrete bridge are in the same specification and are in the same beam, the number of all the anchorage devices, the spiral tendons and the corrugated pipes is checked and calculated, and the size parameters of the anchorage devices are determined;
2. according to the parameters, processing and installing a steel pipe for a grouting pipe seat, a limiting plate, a small grouting steel pipe and a PE steel wire mesh framework pipe;
3. as shown in the attached figures 2 and 3, a steel pipe for a grouting pipe seat is machined and cut, a specially-assigned person is arranged to open a hole on the steel pipe, and the position of the opened hole and the diameter of the hole are well controlled; arranging a welder to weld the anchor backing plate and the grouting pipe seat together; the grouting pipe seat and the grouting steel pipe are welded uniformly, so that the welding quality is ensured;
4. blanking the corrugated pipe corresponding to the length of the vertical prestressed tendon, and forming grout passing holes with the diameter of more than 20mm in the range of 5cm at the two ends of the corrugated pipe;
5. sleeving the welded grouting pipe seat assemblies at the two ends of the corrugated pipe, screwing the JLM anchor into the corrugated pipe along the vertical prestressed ribs, and screwing the anchor to enable the two ends of the corrugated pipe to respectively abut against the limiting plates;
6. as shown in figure 4, a winding adhesive tape is used for sealing a steel pipe of the grouting pipe seat and a gap between the steel pipe and a metal corrugated pipe, so that cement grout is prevented from entering the pipe during concrete pouring;
7. as shown in figure 1, a vertical prestressed pipeline is installed at a designed position and fixed, PE steel wire mesh framework pipes are sleeved on grouting steel pipes at the lower end and the upper end respectively, a firm hose is bound by binding wires, the grouting hose is led out of a beam body to be fixed according to the figure, and then an adhesive tape is used for winding and sealing the opening of the grouting hose to prevent impurities from entering the blocked pipe;
8. and after the vertical prestressed tendons are tensioned, mixing grout, connecting a grouting pipe of a grouting machine with the PE steel wire mesh framework pipe at the bottom, opening a valve for grouting, closing a top pipeline when the PE steel wire mesh framework pipe at the top discharges grout with the same concentration and no bubble emerges, and continuing grouting and maintaining pressure to finish grouting.
The grouting structure of the embodiment has ideal grouting effect, the grouting of the prestressed pipeline is full, the grouting quality of the vertical prestressed pipeline is effectively guaranteed, the stress loss caused by the corrosion of prestressed ribs is prevented, and the vertical prestress lasting effect in a continuous beam prestress system is guaranteed to play a good role.
The above disclosure is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the scope of the invention, which is defined by the appended claims.
Claims (10)
1. The utility model provides a vertical prestressed pipe grouting structure of prestressed concrete roof beam, includes vertical prestressed tendons, anchor assembly and bellows, vertical prestressed tendons suit in the bellows, anchor assembly install in the both ends of vertical prestressed tendons, anchor assembly includes ground tackle and anchor backing plate, its characterized in that: still include the slip casting tube socket, a tip of slip casting tube socket is sealed be fixed in on the anchor backing plate, be close to in the slip casting tube socket the position department of anchor backing plate is provided with the limiting plate, the limiting plate is fixed in the inner wall of slip casting tube socket, the bellows suit in the slip casting tube socket, and its tip with the limiting plate butt, another tip of slip casting tube socket with seal between the bellows, the slip casting hole has been seted up on the slip casting tube socket, seted up on the bellows with the corresponding grout hole of crossing in slip casting hole position, slip casting hole department fixed connection slip casting steel pipe, the slip casting hose is connected to the slip casting steel pipe.
2. The prestressed concrete beam vertical prestressed pipe grouting structure according to claim 1, characterized in that: the four limiting plates are fixed on the inner wall of the grouting pipe seat at equal intervals.
3. The prestressed concrete beam vertical prestressed pipe grouting structure according to claim 2, characterized in that: the limiting plate comprises a limiting portion and a wedge-shaped portion gradually widening along the direction close to the anchor backing plate, the top surface of the wedge-shaped portion is fixedly connected with the bottom surface of the limiting portion, and the corrugated pipe is abutted to the bottom surface of the limiting portion.
4. The prestressed concrete beam vertical prestressed pipe grouting structure according to claim 3, characterized in that: the bottom of the anchor backing plate is also fixed with a spiral reinforcing rib which is sleeved outside the grouting pipe seat.
5. The prestressed concrete girder vertical prestressed pipe grouting structure according to any one of claims 1 to 4, wherein: one end part of the grouting pipe seat is welded on the anchor backing plate in an annular sealing mode.
6. The prestressed concrete girder vertical prestressed pipe grouting structure according to any one of claims 1 to 4, wherein: and the other end of the grouting pipe seat and the corrugated pipe are sealed through an adhesive tape.
7. The prestressed concrete girder vertical prestressed pipe grouting structure according to any one of claims 1 to 4, wherein: the corrugated pipe is a galvanized metal corrugated pipe or an iron sheet pipe.
8. The prestressed concrete girder vertical prestressed pipe grouting structure according to any one of claims 1 to 4, wherein: the diameter of the grouting pipe seat is 10-20 mm larger than that of the corrugated pipe.
9. The prestressed concrete girder vertical prestressed pipe grouting structure according to any one of claims 1 to 4, wherein: the grouting hose is a PE steel wire mesh framework pipe.
10. The prestressed concrete girder vertical prestressed pipe grouting structure according to any one of claims 1 to 4, wherein: the vertical prestressed reinforcing steel bars are finish-rolled twisted steel bars.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020021815.9U CN211873862U (en) | 2020-01-07 | 2020-01-07 | Vertical prestressed pipe grouting structure of prestressed concrete roof beam |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020021815.9U CN211873862U (en) | 2020-01-07 | 2020-01-07 | Vertical prestressed pipe grouting structure of prestressed concrete roof beam |
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| Publication Number | Publication Date |
|---|---|
| CN211873862U true CN211873862U (en) | 2020-11-06 |
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| CN202020021815.9U Active CN211873862U (en) | 2020-01-07 | 2020-01-07 | Vertical prestressed pipe grouting structure of prestressed concrete roof beam |
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|---|---|
| CN (1) | CN211873862U (en) |
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- 2020-01-07 CN CN202020021815.9U patent/CN211873862U/en active Active
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