CN113622324A

CN113622324A - Reinforcing structure of bridge abutment and construction method thereof

Info

Publication number: CN113622324A
Application number: CN202111112666.2A
Authority: CN
Inventors: 陈亚舟; 王华平; 吴剑兵; 周良云; 米俊
Original assignee: China Construction Eighth Engineering Divion Southern Construction Co Ltd
Current assignee: China Construction Eighth Engineering Divion Southern Construction Co Ltd
Priority date: 2021-09-23
Filing date: 2021-09-23
Publication date: 2021-11-09

Abstract

The invention discloses a reinforced structure of bridge abutment and a construction method thereof, wherein the lower part of the abutment is buried in a soil body, a bearing platform supported at the lower part of the abutment is poured in the soil body, and the reinforcement of the bridge abutment comprises the following steps: the two clamping beams are bonded to two opposite sides of the abutment, embedded bars are embedded in the clamping beams, and the embedded bars are embedded in the abutment; the shoulder pole rib penetrates through the pier and two ends of the shoulder pole rib are respectively anchored in the two clamping beams; and a plurality of miniature cast-in-place piles, wherein the miniature cast-in-place piles are poured in the soil body, the upper ends of the miniature cast-in-place piles are supported on the clamping beams, the lower ends of the miniature cast-in-place piles are inserted in the sandstone layer below the soil body, and the miniature cast-in-place piles are arranged at intervals along the length direction of the clamping beams. The method solves the problems of high cost and long time consumption of the traditional method for reinforcing the reinforced concrete abutment of the bridge.

Description

Reinforcing structure of bridge abutment and construction method thereof

Technical Field

The invention relates to the technical field of bridge construction, in particular to a reinforcing structure of a bridge abutment and a construction method thereof.

Background

For reinforcing the reinforced concrete pier of the bridge, a method of removing and rebuilding or a method of reinforcing a pile foundation is generally adopted. The method for breaking the re-construction is high in cost, long in time consumption and uneconomical; for the reinforcement method of the supplement pile foundation, the original foundation bearing platform needs to be enlarged, the connection construction difficulty of the new bearing platform and the old bearing platform is higher, and certain requirements are provided for surrounding fields.

Disclosure of Invention

In order to overcome the defects in the prior art, the reinforcing structure of the bridge abutment and the construction method thereof are provided, so that the problems of high cost and long consumed time of the traditional reinforcing method of the reinforced concrete abutment of the bridge are solved.

In order to realize above-mentioned purpose, provide a reinforced structure of bridge pier, the lower part of pier is buried underground in the soil body, pour in the soil body support in the cushion cap of the lower part of pier, the reinforcement of bridge pier includes:

the two clamping beams are bonded to two opposite sides of the abutment, embedded bars are embedded in the clamping beams, and the embedded bars are embedded in the abutment;

the shoulder pole rib penetrates through the pier and two ends of the shoulder pole rib are respectively anchored in the two clamping beams; and

the soil body is provided with a plurality of miniature filling piles, the miniature filling piles are poured in the soil body, the upper ends of the miniature filling piles are supported on the clamping beams, the lower ends of the miniature filling piles are inserted in the sandstone layer below the soil body, and the miniature filling piles are arranged at intervals along the length direction of the clamping beams.

Further, the miniature cast-in-place pile penetrates through the bearing platform.

Further, the clamping beam is arranged along the width direction of the bridge.

Furthermore, the quantity of carrying pole muscle is many, the carrying pole muscle is followed the length direction of bridge sets up, many the carrying pole muscle is followed the length direction interval of centre gripping roof beam sets up.

Furthermore, two layers of carrying pole ribs penetrate through the pier, the upper layer of carrying pole ribs are anchored in the upper part of the clamping beam, and the lower layer of carrying pole ribs are anchored in the lower part of the clamping beam.

Furthermore, the end reinforcing bar bundles of the miniature filling pile extend into the clamping beam in a trumpet shape.

Furthermore, the outer diameter of the micro cast-in-place pile is 150 mm-300 mm.

The invention provides a construction method of a reinforced structure of a bridge abutment, which comprises the following steps:

respectively pouring a plurality of micro filling piles in soil bodies on two opposite sides of a pier of the bridge, so that the lower ends of the micro filling piles are inserted into a sandstone layer below the soil body, and the plurality of micro filling piles are arranged at intervals along the width direction of the bridge;

the shoulder pole rib is arranged in the pier in a penetrating mode, so that two ends of the shoulder pole rib respectively extend to the outer portions of two opposite sides of the pier;

implanting embedded bars in opposite sides of the abutment so that the embedded bars extend to the outside of the opposite sides of the abutment;

chiseling the side walls on the two opposite sides of the pier and pouring clamping beams on the outer sides of the side walls on the two opposite sides of the pier along the width direction of the bridge, so that the two clamping beams are bonded on the side walls on the two opposite sides of the pier, and the upper end of the miniature cast-in-place pile, the embedded bars and the shoulder pole bars are embedded in the clamping beams.

The reinforcing structure of the bridge abutment has the advantages that the reinforcing structure of the bridge abutment has the effect of stabilizing the abutment and preventing continuous settlement by adopting the combination of the micro cast-in-place piles and the shoulder pole ribs penetrating through the abutment on the two sides of the abutment, is particularly suitable for the conditions that concrete structures such as piers, abutments, culverts and the like have large settlement and have large requirements on construction period and cost control, not only ensures that original concrete structures are not damaged and requirements on the construction period are met, but also ensures that the abutment of a bridge to be reinforced is reinforced to achieve the expected reinforcing effect.

Drawings

Other features, objects and advantages of the present application will become more apparent upon reading of the following detailed description of non-limiting embodiments thereof, made with reference to the accompanying drawings in which:

fig. 1 is a schematic structural view of a bridge to be reinforced.

Fig. 2 is a schematic structural view of a reinforcing structure of a bridge abutment according to an embodiment of the present invention.

Fig. 3 is a cross-sectional view of a clamping beam of an embodiment of the invention.

Fig. 4 is a top view of a clamping beam of an embodiment of the present invention.

Detailed Description

The present application will be described in further detail with reference to the following drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the relevant invention and not restrictive of the invention. It should be noted that, for convenience of description, only the portions related to the present invention are shown in the drawings.

It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present application will be described in detail below with reference to the embodiments with reference to the attached drawings.

Referring to fig. 1, in the present embodiment, a bridge 4 to be reinforced spans over a river 8, and two ends of the bridge 4 are erected on two banks of the river through abutments 6. The bearing platforms 5 are poured in soil bodies on two sides of the river channel, and the bearing platforms 5 are supported at the bottoms of the abutments 6.

Referring again to fig. 2 to 4, the present invention provides a reinforcing structure of a bridge abutment, including: two clamping beams 1, a shoulder pole rib 2 and a plurality of miniature cast-in-place piles 3.

Wherein the two clamping beams 1 are bonded to opposite sides of the abutment 6. The clamping beam 1 is embedded with embedded bars 11. The planting bars 11 are planted in the abutment 6.

The shoulder pole rib 2 penetrates through the pier 6, and two ends of the shoulder pole rib 2 are respectively anchored in the two clamping beams 1.

And a plurality of micro cast-in-place piles 3 are poured in the soil body. The upper end of the micro cast-in-place pile 3 is supported on the clamping beam 1. The lower end of the micro filling pile 3 is inserted into the sandstone layer 7 below the soil body. A plurality of micro cast-in-place piles 3 are arranged at intervals along the length direction of the clamping beam 1.

According to the reinforcing structure of the bridge abutment, the micro cast-in-place piles and the shoulder pole ribs penetrating through the abutment are combined to support and reinforce the abutment on two sides of the abutment, so that the effect of stabilizing the abutment and preventing continuous settlement is achieved, the reinforcing structure is particularly suitable for the situation that concrete structures such as piers, abutments, culverts and the like are greatly settled and construction period and cost control have large requirements, the original concrete structure is not damaged, the requirement of the construction period is met, and the abutment of a bridge to be reinforced is reinforced to achieve the expected reinforcing effect.

In this embodiment, the outer diameter of the bearing platform is larger than that of the abutment, and the micro cast-in-place pile 3 penetrates through the bearing platform 5.

As a preferred embodiment, the clamp beam 1 is arranged along the width direction of the bridge beam 4.

In the present embodiment, the number of the shoulder pole ribs 2 is plural. The shoulder pole ribs 2 are arranged along the length direction of the bridge 4. A plurality of shoulder pole ribs 2 are arranged at intervals along the length direction of the clamping beam 1.

Two layers of shoulder pole ribs 2 penetrate through the pier 6. Wherein, the upper-layer shoulder pole rib 2 is anchored in the upper part of the clamping beam 1; the lower-layer shoulder pole rib 2 is anchored in the lower part of the clamping beam 1.

In this embodiment, the diameter of the shoulder pole rib 2 is greater than 32mm, and the upper and lower two-layer is along the bridge to running through the abutment, and the horizontal bridge is less than 40cm to the interval, plays the shoulder pole effect, supports the abutment, prevents that the abutment from continuing to subside.

The diameter of the implanted bar 11 is larger than 32mm, the implantation depth is larger than 30cm, and the distance in the transverse bridge direction is smaller than 50 cm.

In this embodiment, the end tendons of micro-cast-in-place piles 3 extend in a trumpet shape into the clamping beam 1. The outer diameter of the micro cast-in-place pile 3 is 150 mm-300 mm.

s1: a plurality of micro cast-in-place piles 3 are respectively poured in soil bodies on two opposite sides of a pier 6 of the bridge 4, so that the lower ends of the micro cast-in-place piles 3 are inserted into a sandstone layer 7 below the soil bodies, and the micro cast-in-place piles 3 are arranged at intervals in the width direction of the bridge 4.

S2: the shoulder pole 2 is arranged in the pier 6 in a penetrating mode, so that two ends of the shoulder pole 2 respectively extend to the outer portions of two opposite sides of the pier 6.

S3: the planted bars 11 are implanted in opposite sides of the abutment 6 such that the planted bars 11 extend to the outside of the opposite sides of the abutment 6.

S4: chiseling the side walls on the two opposite sides of the pier 6 and pouring the clamping beams 1 on the outer sides of the side walls on the two opposite sides of the pier 6 along the width direction of the bridge 4, so that the two clamping beams 1 are bonded on the side walls on the two opposite sides of the pier 6, and the upper end of the miniature cast-in-place pile 3, the embedded bars 11 and the carrying pole bars 2 are embedded in the clamping beams 1.

The above description is only a preferred embodiment of the application and is illustrative of the principles of the technology employed. It will be appreciated by a person skilled in the art that the scope of the invention as referred to in the present application is not limited to the embodiments with a specific combination of the above-mentioned features, but also covers other embodiments with any combination of the above-mentioned features or their equivalents without departing from the inventive concept. For example, the above features may be replaced with (but not limited to) features having similar functions disclosed in the present application.

Claims

1. The utility model provides a reinforced structure of bridge pier, its characterized in that, the lower part of pier is buried underground in the soil body, pour in the soil body support in the cushion cap of the lower part of pier, the reinforcement of bridge pier includes:

2. The reinforcing structure of bridge abutment according to claim 1, wherein said micro cast-in-place pile penetrates said bearing platform.

3. The reinforcing structure of a bridge abutment according to claim 1, wherein the clamping beam is provided in a width direction of the bridge.

4. The reinforcing structure of a bridge pier of claim 3, wherein the number of the shoulder pole ribs is plural, the shoulder pole ribs are arranged along a length direction of the bridge, and the plural shoulder pole ribs are arranged at intervals along the length direction of the clamping beam.

5. The reinforcing structure of a bridge pier of claim 4, wherein two layers of the shoulder pole ribs penetrate through the pier, the upper layer of the shoulder pole ribs are anchored in the upper part of the clamping beam, and the lower layer of the shoulder pole ribs are anchored in the lower part of the clamping beam.

6. The reinforcing structure of bridge abutment according to claim 1, wherein the head tendons of the micro cast-in-place piles extend in a trumpet shape into the clamping beams.

7. The reinforcing structure of a bridge abutment according to claim 6, wherein the micro cast-in-place pile has an outer diameter of 150mm to 300 mm.

8. A construction method of the reinforcing structure of bridge abutments according to any one of claims 1 to 7, characterized by comprising the steps of: