Bridge pile reinforcing and repairing method

Abstract

The invention relates to a bridge pile reinforcing and repairing method, a bridge comprises a plurality of rows of bridge piles, and the method is completed through the following steps that firstly, temporary bearing piles are constructed; secondly, reinforcing piles are constructed, and the reinforcing piles and the bridge piles in the row where the to-be-repaired bridge piles are located are arranged at intervals; thirdly, a bearing platform is constructed, specifically, the to-be-repaired bridge piles are repaired till the height meets the requirement, then the reinforced concrete bearing platform is poured, and the reinforcing piles and the bridge piles in the row where the to-be-repaired bridge piles are located are poured together; and fourthly, the bridge deck slab section is reset, specifically, the temporary bearing pile upper section is driven by the lifting mechanism to descend so that the bridge deck slab section can be supported on the cover beam, and the temporary bearing pile upper section is dismantled. According to the bridge pile reinforcing method, repairing is convenient, passing on the bridge is not affected during repairing, and the problems that an existing bridge pile repairing method is inconvenient to repair, and passing of the bridge is affected are solved.

Description

Technical Field

[0001] The invention relates to the technical field of bridge construction, and in particular to a bridge pile reinforcement method. Background Art

[0002] The basic structure of a bridge includes several rows of bridge piles, and the same row of bridge piles is distributed along the transverse direction of the bridge. The same row of bridge piles supports a cap beam, and the adjacent cap beams are supported at both ends of the bridge deck section. The bridge deck section includes several prefabricated box beams distributed along the transverse direction and supported on adjacent cap beams at both ends, and a cast-in-place bridge concrete surface layer cast on the prefabricated box beams, and expansion joints are provided between adjacent cast-in-place bridge concrete surface layers. During the construction of the bridge, sometimes due to the influence of changes in geological conditions, individual bridge piles will sink, causing the bridge deck to tilt and / or the force to decrease. In order to ensure traffic safety, the bridge piles need to be repaired at this time. The existing method for repairing sunken bridge piles (hereinafter referred to as bridge piles to be repaired) is to stop the traffic on the bridge, dig out the sunken bridge piles, and then increase the implantation depth of the bridge piles to rebuild new bridge piles to replace the sunken bridge piles. This method is time-consuming to dig out the sunken bridge piles and generates construction waste. There is trouble in adjusting the force consistency between the rebuilt bridge piles and the original bridge piles, and the bridge needs to be closed to traffic during the repair period. Summary of the invention

[0003] The present invention aims to provide a bridge pile reinforcement and repair method which is convenient to repair and does not affect traffic on the bridge during the repair, thereby solving the problem that the existing bridge pile repair method is inconvenient to repair and affects traffic on the bridge.

[0004] The above technical problems are solved by the following technical solutions: a method for reinforcing and repairing bridge piles, wherein the bridge comprises several rows of bridge piles, the bridge piles in the same row of bridge piles are distributed along the transverse direction of the bridge, cap beams are supported on the same row of bridge piles, adjacent cap beams are supported at both ends of a bridge deck section, the bridge deck section comprises several prefabricated box beams distributed along the transverse direction of the bridge and supported on adjacent cap beams at both ends, and a cast-in-place bridge concrete surface layer cast on the prefabricated box beams, expansion joints are provided between adjacent cast-in-place bridge concrete surface layers, and the method is characterized in that the method is completed by the following steps: the first step is to construct temporary supporting piles: a row of temporary supporting pile concrete foundation piles is constructed next to the bridge piles in the row where the bridge piles to be repaired are located, the temporary supporting pile concrete foundation piles are distributed along the transverse direction of the bridge, and steel structures are built on the temporary supporting pile concrete foundation piles. The upper section of the temporary supporting piles is constructed, and the upper section of the temporary supporting piles is provided with a lifting mechanism to adjust the height of the upper section of the temporary supporting piles, and the crossbeam is supported on all the upper sections of the temporary supporting piles. The upper section of the temporary supporting piles is driven up by the lifting mechanism so that the crossbeam pushes all the prefabricated box beams away from the cap beam supported by the bridge piles to be repaired; the second step is to construct reinforcement piles, and the reinforcement piles are arranged at intervals with the bridge piles in the row where the bridge piles to be repaired are located; the third step is to build the pedestal: the bridge piles to be repaired are repaired to a height that meets the requirements, and then the reinforced concrete pedestal is cast to cast the reinforcement piles and the bridge piles in the row where the bridge piles to be repaired are located together; the fourth step is to reset the bridge deck section: the upper section of the temporary supporting piles is driven down by the lifting mechanism so that the bridge deck section is supported on the cap beam, and the upper section of the temporary supporting piles is removed. When the technical solution is used to repair the bridge pile by sinking, all the bridge piles and the reinforcement piles can form a support to assist the sinking bridge piles, thereby avoiding the increase of concrete waste caused by digging out the sinking bridge piles and re-pour. In addition, the amount of work required when digging out the bridge piles is large, and the temporary reinforcement strength of the bridge is required to be high, otherwise it is easy to cause the displacement of other bridge piles that have not sunk. This repair solution does not affect the upper traffic of the bridge.

[0005] Preferably, the bridge piles in the row where the bridge piles to be repaired are located are provided with a plurality of connection holes, in which steel bar connectors are inserted, and the steel bar connectors are fixed to the steel bar skeleton of the reinforced concrete cap, and the steel bar connectors are fixed to the connection holes, so as to improve the connection reliability between the cast reinforced concrete cap and the bridge piles.

[0006] Preferably, the steel bar connecting head includes a steel bar sleeve and a steel bar inner core inserted in the steel bar sleeve. After the connecting hole is drilled, the steel bar sleeve is first inserted into the connecting hole. The connecting hole and the steel bar sleeve are both linear structures. A dust outlet gap surrounding the outer periphery of the steel bar sleeve is provided between the steel bar sleeve and the hole wall of the connecting hole. A supporting foot is provided at the inner end of the steel bar sleeve. Air holes are formed between adjacent supporting feet and the bottom wall of the connecting hole. The cross-section of the bottom wall of the connecting hole is "W"-shaped. After the steel bar sleeve is inserted into the connecting hole, it is maintained parallel to the extension direction of the connecting hole. The steel bar sleeve is fixed together with the steel bar skeleton of the reinforced concrete pedestal for fixed positioning. Air is blown into the connecting hole from the outer end of the steel bar sleeve, and the wind entering the steel bar sleeve is reflected by the bottom wall of the connecting hole. After the injection, the dust flows out of the connection hole from the dust outlet gap in a direction parallel to the steel sleeve, so that the dust in the connection hole is blown out until the cleanliness of the connection hole meets the requirements, and cement mortar is injected from the outer end of the steel sleeve into the connection hole until the cement mortar flows out from the dust outlet gap, the steel core is inserted into the steel sleeve to pressurize the cement mortar in the connection hole, the steel core is fixed together with the steel skeleton of the reinforced concrete cap, and then concrete is poured on the steel skeleton of the reinforced concrete cap. After the concrete solidifies, it forms the reinforced concrete cap together with the steel skeleton of the reinforced concrete cap, and the cement slurry in the connection hole is together with the reinforced concrete cap. The cement slurry in the connection hole solidifies to form a concrete connector of the connection hole. It can easily start to achieve the cleaning and protection requirements of the connection hole. It can ensure that the steel connector is reliably bonded to the connection hole.

[0007] Preferably, an annular positioning groove extending along the circumference of the connecting hole is provided on the bottom wall of the connecting hole, and the supporting foot is supported in the annular positioning groove, so that the steel bar sleeve can be accurately positioned when inserted into the connecting hole in a distributed and rapid manner.

[0008] Preferably, an annular connection groove is provided on the peripheral surface of the row of bridge piles to be repaired, and before pouring the reinforced concrete cap, the annular connection groove and the portion where the bridge piles in the row of bridge piles to be repaired are connected to the reinforced concrete cap to a required cleanliness, and when pouring the reinforced concrete cap, the concrete flows into the annular connection groove and solidifies to form a concrete connection ring, which can improve the connection reliability between the reinforced concrete cap and the surface of the bridge pile.

[0009] Preferably, the bottom of the annular connecting groove is located at the top with the opening facing downwards, so that the annular connecting groove can be cleaned conveniently and quickly.

[0010] Preferably, after the annular connection groove and the part where the bridge piles in the row to be repaired are connected to the reinforced concrete cap, a wire filter is wrapped on the part where the bridge piles in the row to be repaired are connected to the reinforced concrete cap, and the slurry in the concrete during the casting of the reinforced concrete cap penetrates through the wire filter and reaches the annular connection groove to solidify to form the annular concrete connection ring and reaches the part where the bridge piles in the row to be repaired are connected to the reinforced concrete cap to form a concrete bonding layer. This can improve the connection reliability, ensure the compactness of the reversing concrete connection ring, and avoid the generation of gaps that affect the connection reliability.

[0011] Preferably, the steel bar connectors are arranged in two rows in the vertical direction, the steel bar connectors in the same row are distributed along the circumference of the bridge piles in the row where the bridge piles to be repaired are located, and the steel bar connectors adjacent to each other are staggered in the vertical direction and welded together by steel bars, so as to improve the connection reliability.

[0012] Preferably, the upper end of the temporary supporting pile concrete foundation pile is provided with a reinforced concrete protrusion, and the reinforced concrete protrusion is cast together with the reinforced concrete cap, which can further improve the ability to resist sinking.

[0013] Preferably, the reinforced concrete cap is cast on the upper end surface of the reinforcement pile, so that the reinforcement pile and the reinforced concrete cap are conveniently fixed together and have good supporting strength.

[0014] The present invention has the following advantages: traffic on the bridge can continue to flow during repair; no construction waste caused by digging out bridge piles is generated; there is no need to dig out old bridge piles; and it is convenient to level and stress the new and old bridge piles. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the bridge cap in the first embodiment when it has been built; Figure 2 This is a schematic diagram of temporary supporting piles; Figure 3 for Figure 1 A schematic cross-sectional view of Figure 4 for Figure 3 A local enlarged schematic diagram of point A; Figure 5 for Figure 6 A local enlarged schematic diagram of point B; Figure 6 It is a vertical cross-sectional schematic diagram of the connection between the bridge pile and the construction cap; Figure 7 for Figure 6 A local enlarged schematic diagram of point C; Figure 8 This is a schematic diagram of the second embodiment.

[0016] In the figure: bridge piles 1, cap beams 2, bridge deck sections 3, prefabricated box beams 4, cast-in-place bridge concrete surface layers 5, temporary supporting piles 6, temporary supporting pile concrete foundation piles 7, temporary supporting pile upper sections 8, lifting mechanisms 9, cross beams 10, reinforcement piles 11, caps 13, steel bar connectors 14, steel bar sleeves 15, steel bar inner cores 16, support feet 17, bottom wall of connecting holes 18, connecting hole concrete connectors 19, annular positioning grooves 12, annular connecting grooves 20, concrete connecting rings 21, wire filters 22, and reinforced concrete protrusions 23. DETAILED DESCRIPTION

[0017] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0018] Example 1, see Figures 1 to 7, a method for reinforcing and repairing bridge piles, the bridge includes several rows of bridge piles, the bridge piles 1 in the same row of bridge piles are distributed along the transverse direction of the bridge, the same row of bridge piles are supported by a cap beam 2, the adjacent cap beams are supported at both ends of a bridge deck section 3, the bridge deck section includes several prefabricated box beams 4 distributed along the distribution direction of the bridge piles and supported on adjacent cap beams at both ends, and a cast-in-place bridge concrete surface layer 5 cast on the prefabricated box beams, and expansion joints are provided between adjacent cast-in-place bridge concrete surface layers. The repair of the bridge piles to be repaired is completed by the following steps, the first step is to build temporary supporting piles 6: a row of temporary supporting pile concrete foundation piles 7 is built next to the bridge piles in the row where the bridge piles to be repaired are located, the temporary supporting pile concrete foundation piles are distributed along the transverse direction of the bridge, and a temporary supporting pile upper section 8 of a steel structure is built on the temporary supporting pile concrete foundation piles, the temporary supporting pile upper section is provided with a lifting mechanism 9 (specifically a jack) to adjust the height of the temporary supporting pile upper section, the cross beam 10 is supported on all the temporary supporting pile upper sections, and the temporary supporting pile upper section is driven to rise by the lifting mechanism The crossbeam pushes all the prefabricated box beams away from the cap beam supported by the bridge piles to be repaired; the second step is to build reinforcement piles, and the reinforcement piles 11 are arranged at intervals with the bridge piles in the row where the bridge piles to be repaired are located; the third step is to build the pedestal 13: repair the bridge piles to be repaired to a height that meets the requirements, and then cast the reinforced concrete pedestal to cast the reinforcement piles and the bridge piles in the row where the bridge piles to be repaired are located together; the fourth step is to reset the bridge deck section: drive the upper section of the temporary supporting piles to descend through the lifting mechanism so that the bridge deck section is supported on the cap beam, and remove the upper section of the temporary supporting piles.A plurality of connection holes are provided on the bridge piles in the row where the bridge piles to be repaired are located, and a steel bar connection head 14 is inserted into the connection hole, and the steel bar connection head is fixed together with the steel bar skeleton of the reinforced concrete cap, and the steel bar connection head is fixed together with the connection hole. Specifically: the steel bar connection head includes a steel bar sleeve 15 and a steel bar inner core 16 inserted in the steel bar sleeve. After the connection hole is drilled, the steel bar sleeve is first inserted into the connection hole. The connection hole and the steel bar sleeve are both linear structures. A dust outlet gap surrounding the outer periphery of the steel bar sleeve is provided between the steel bar sleeve and the hole wall of the connection hole. A supporting foot 17 is provided at the inner end of the steel bar sleeve, and a wind hole is formed between the adjacent supporting feet and the bottom wall of the connection hole. The cross-section of the bottom wall 18 of the connection hole is in the shape of a "w". After the steel bar sleeve is inserted into the connection hole, it is maintained parallel to the extension direction of the connection hole. The steel bar sleeve is fixed together with the steel bar skeleton of the reinforced concrete cap. The steel sleeve is fixed and positioned, and air is blown from the outer end of the steel sleeve toward the connection hole. The air entering the steel sleeve is reflected by the bottom wall of the connection hole and flows out of the connection hole from the dust outlet gap in a direction parallel to the steel sleeve, thereby blowing out the dust in the connection hole until the cleanliness of the connection hole meets the requirements. Then cement mortar is injected from the outer end of the steel sleeve toward the connection hole until the cement mortar flows out of the dust outlet gap. The steel core is inserted into the steel sleeve to pressurize the cement mortar in the connection hole, and the steel core is fixed with the steel skeleton of the reinforced concrete cap. Then concrete is poured on the steel skeleton of the reinforced concrete cap. After the concrete solidifies, it forms the reinforced concrete cap together with the steel skeleton of the reinforced concrete cap. The cement slurry in the connection hole is together with the reinforced concrete cap. The cement slurry in the connection hole solidifies to form a concrete connector 19 of the connection hole. An annular positioning groove 12 extending along the circumference of the connection hole is provided on the bottom wall of the connection hole, and the support foot is supported in the annular positioning groove. An annular connecting groove 20 is provided on the circumference of the row of bridge piles to be repaired. Before casting the reinforced concrete cap, the annular connecting groove and the portion where the bridge piles in the row of bridge piles to be repaired are connected to the reinforced concrete cap to a required cleanliness. When casting the reinforced concrete cap, concrete flows into the annular connecting groove and solidifies to form a concrete connecting ring 21. Specifically: the bottom of the annular connecting groove is located at the top and the opening faces downward. After the annular connecting groove and the portion where the bridge piles in the row of bridge piles to be repaired are connected to the reinforced concrete cap to a required cleanliness, a wire filter 22 is wrapped on the portion where the bridge piles in the row of bridge piles to be repaired are connected to the reinforced concrete cap. When casting the reinforced concrete cap, the slurry in the concrete penetrates through the wire filter and reaches the annular connecting groove to solidify to form an annular concrete connecting ring and reaches the portion where the bridge piles in the row of bridge piles to be repaired are connected to the reinforced concrete cap to form a concrete bonding layer. There are two rows of steel bar connectors in the vertical direction. The steel bar connectors in the same row are distributed along the circumference of the row of bridge piles to be repaired. The upper and lower adjacent steel bar connectors are staggered in the vertical direction and welded together by steel bars. The reinforced concrete cap is cast on the upper end surface of the reinforced pile.

[0019] Embodiment 2 is different from Embodiment 1 in that: See also Figure 8 The upper end of the temporary supporting pile concrete foundation pile is provided with a reinforced concrete protrusion 23, and the reinforced concrete protrusion is cast together with the reinforced concrete cap.

[0020] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions described in the above embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A method for reinforcing and repairing bridge piles, wherein the bridge comprises a plurality of rows of bridge piles, the bridge piles in the same row of bridge piles are distributed in the transverse direction of the bridge, cap beams are supported on the same row of bridge piles, adjacent cap beams are supported at both ends of a bridge deck section, the bridge deck section comprises a plurality of prefabricated box beams distributed in the transverse direction of the bridge and supported on adjacent cap beams at both ends, and a cast-in-place bridge concrete surface layer cast on the prefabricated box beams, expansion joints are provided between adjacent cast-in-place bridge concrete surface layers, characterized in that: The construction is completed through the following steps: the first step is to construct temporary supporting piles: construct a row of temporary supporting pile concrete foundation piles beside the bridge piles in the row where the bridge piles to be repaired are located, the temporary supporting pile concrete foundation piles are distributed along the transverse direction of the bridge, and the temporary supporting pile upper section of the steel structure is built on the temporary supporting pile concrete foundation piles. The temporary supporting pile upper section is provided with a lifting mechanism to adjust the height of the temporary supporting pile upper section, and the cross beam is supported on all the temporary supporting pile upper sections. The temporary supporting pile upper section is driven up by the lifting mechanism so that the cross beam pushes all the prefabricated box beams away from the cap beam supported by the bridge piles to be repaired; the second step is to construct reinforcement piles, and the reinforcement piles are arranged at intervals with the bridge piles in the row where the bridge piles to be repaired are located; the third step is to construct the pedestal: repair the bridge piles to be repaired to a height that meets the requirements, and then cast the reinforced concrete pedestal to cast the reinforcement piles and the bridge piles in the row where the bridge piles to be repaired are located together; the fourth step is to reset the bridge deck section: drive the temporary supporting pile upper section down by the lifting mechanism so that the bridge deck section is supported on the cap beam, and remove the temporary supporting pile upper section.

2. A bridge pile reinforcement and repair method according to claim 1, characterized in that: The row of bridge piles to be repaired is provided with a plurality of connection holes, in which steel bar connectors are passed, and the steel bar connectors are fixed to the steel bar skeleton of the reinforced concrete cap, and the steel bar connectors are fixed to the connection holes.

3. A bridge pile reinforcement and repair method according to claim 2, characterized in that: The steel bar connector includes a steel bar sleeve and a steel bar inner core inserted in the steel bar sleeve. After the connecting hole is drilled, the steel bar sleeve is first inserted into the connecting hole. The connecting hole and the steel bar sleeve are both linear structures. A dust outlet gap surrounding the outer periphery of the steel bar sleeve is provided between the steel bar sleeve and the hole wall of the connecting hole. A supporting foot is provided at the inner end of the steel bar sleeve. A wind hole is formed between adjacent supporting feet and the bottom wall of the connecting hole. The cross-section of the bottom wall of the connecting hole is a "w" shape. After the steel bar sleeve is inserted into the connecting hole, it is maintained parallel to the extension direction of the connecting hole. The steel bar sleeve is fixed together with the steel bar skeleton of the reinforced concrete pedestal for fixed positioning. Air is blown into the connecting hole from the outer end of the steel bar sleeve. The wind entering the steel bar sleeve is reflected by the bottom wall of the connecting hole and then blows out in the form of a fan. The connecting hole is parallel to the direction of the steel sleeve and flows out of the dust outlet gap, so that the dust in the connecting hole is blown out until the cleanliness of the connecting hole meets the requirements, and cement mortar is injected into the connecting hole from the outer end of the steel sleeve until the cement mortar flows out of the dust outlet gap, the steel core is inserted into the steel sleeve and the cement mortar in the connecting hole is pressurized, the steel core is fixed together with the steel skeleton of the reinforced concrete cap, and then concrete is poured on the steel skeleton of the reinforced concrete cap. After the concrete solidifies, it forms the reinforced concrete cap together with the steel skeleton of the reinforced concrete cap, the cement slurry in the connecting hole is together with the reinforced concrete cap, and the cement slurry in the connecting hole is solidified to form a concrete connector of the connecting hole.

4. A bridge pile reinforcement and repair method according to claim 3, characterized in that: An annular positioning groove extending along the circumference of the connecting hole is provided on the bottom wall of the connecting hole, and the supporting foot is supported in the annular positioning groove.

5. A bridge pile reinforcement and repair method according to claim 1, 2, 3 or 4, characterized in that: An annular connecting groove is provided on the circumferential surface of the row of bridge piles to be repaired. Before casting the reinforced concrete cap, the annular connecting groove and the connection parts of the bridge piles in the row of bridge piles to be repaired with the reinforced concrete cap are cleaned to the required cleanliness. When casting the reinforced concrete cap, the concrete flows into the annular connecting groove and solidifies to form a concrete connecting ring.

6. A bridge pile reinforcement and repair method according to claim 5, characterized in that: The bottom of the annular connecting groove is located at the top and the opening faces downward.

7. A bridge pile reinforcement and repair method according to claim 5, characterized in that: After the annular connecting groove and the connection parts of the bridge piles in the row of bridge piles to be repaired and the reinforced concrete cap are cleaned to the required cleanliness, a wire filter is wrapped on the connection parts of the bridge piles in the row of bridge piles to be repaired and the reinforced concrete cap. The slurry in the concrete during the casting of the reinforced concrete cap penetrates through the wire filter and reaches the annular connecting groove to be solidified to form the annular concrete connecting ring and reaches the connection parts of the bridge piles in the row of bridge piles to be repaired and the reinforced concrete cap to form a concrete bonding layer.

8. A bridge pile reinforcement and repair method according to claim 2, 3 or 4, characterized in that: The steel bar connectors are arranged in two rows along the up-down direction. The steel bar connectors in the same row are distributed circumferentially along the row of bridge piles to be repaired. The upper and lower adjacent steel bar connectors are staggered along the up-down direction and welded together by steel bars.

9. A bridge pile reinforcement and repair method according to claim 1, 2, 3 or 4, characterized in that: The upper end of the temporary supporting pile concrete foundation pile is provided with a reinforced concrete protrusion, and the reinforced concrete protrusion is cast together with the reinforced concrete cap.

10. A bridge pile reinforcement and repair method according to claim 1 or 2 or 3 or 4, characterized in that: The reinforced concrete cap is cast on the upper end surface of the reinforcement pile.

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