CN202577131U

CN202577131U - Urban viaduct pier with prestressed concrete big cantilever bent cap

Info

Publication number: CN202577131U
Application number: CN 201220004306
Authority: CN
Inventors: 许宏元; 慕玉坤; 尹恒
Original assignee: Xi'an Rui Tong Highway & Bridge Science & Technology Co Ltd
Current assignee: CCCC RUITONG ROAD & BRIDGE MAINTENANCE SCIENCE & TECHNOLOGY CO., LTD.
Priority date: 2012-01-05
Filing date: 2012-01-05
Publication date: 2012-12-05
Anticipated expiration: 2022-01-05

Abstract

The utility model relates to a structure of an urban viaduct, in particular to an urban viaduct pier with a prestressed concrete big cantilever bent cap. The technical scheme of the urban viaduct pier lies in that the urban viaduct pier comprises a pier foundation, a bearing platform, a stand column and a bent cap, wherein an FBG (Fiber Bragg Grating) strain sensor and a static water level are arranged on the bent cap. According to the urban viaduct pier, during structural design, a thought of bridge health monitoring is blended in, so that the structural design is optimized, and the measurability and the controllability of the whole process from constructing to operating of bridge management are realized so as to guarantee the bridge safety operation; and in addition, a streamline design is adopted to the structure, and the appearance is novel, so that the width of an underbridge traffic lane is effectively increased, and the riding comfort of the underbridge street is improved.

Description

The urban viaduct bridge pier of the big cantilever bent cap of prestressed concrete

Technical field

The utility model relates to a kind of structure of urban viaduct, the urban viaduct bridge pier of the big cantilever bent cap of particularly a kind of prestressed concrete.

Background technology

Urban viaduct can reduce the city floor space in the urban road transformation, improve the current visual field under the bridge, effectively practices thrift construction cost, improves the operation management level.

Existing urban viaduct bridge pier cantilever span is little, common only post bent cap cantilever maximum size 4.5m, and the tight type twin columns have maximum cantilever size 6.2m now, cause that available track is less under the bridge, bridge down train comfortableness is poor.Bridge pier adopts the blunt form design simultaneously, and aesthetic property is relatively poor.Big cantilever bent cap is not considered the long-term health monitoring to bent cap in the design stage, can't grasp the effective stress of bridge prestress steel bundle in the operation process.Yet big cantilever bent cap all adopts multi beam large-tonnage prestressed strand usually; The effective stress loss of steel bundle is directly connected to the operation security of bridge; Then bridge operation state can not be monitored if can not directly measure the effective stress of steel bundle, operation security can't be effectively ensured.

The utility model content

The utility model for overcoming disadvantages of background technology, the urban viaduct bridge pier of the big cantilever bent cap of a kind of prestressed concrete is provided.

For solving the problems of the technologies described above, the technical scheme that the utility model adopts is:

The urban viaduct bridge pier of the big cantilever bent cap of prestressed concrete comprises pile foundation, cushion cap, column, bent cap; Fiber Bragg grating strain sensor and static level gauge are installed on the said bent cap.

In the utility model, said column can be right cylinder.

In the utility model, said column can be Y type column.

Said column is in the scheme of right cylinder, and said bent cap is the big cantilever of the degree of uprising of 805cm, its root section height 2.2m, its end section height 1.2m; Said two right cylinder transverse width 180cm, its vertical bridge is to 180cm; Said pile foundation diameter 1.8m; The thick 2.5m of said cushion cap; Said pile foundation is four, connects as a whole through cushion cap.

Said column is in the scheme of Y type column, and said bent cap is the big semi girder of the degree of uprising of 650cm, its root section height 2.2m, its end section height 1.2m; Said two Y type column transverse width 180cm, its vertical bridge is to 180cm; Said pile foundation diameter 1.8m; The thick 2.5m of said cushion cap; Said pile foundation is four, connects as a whole through cushion cap.

When structure design, begin to incorporate the thought of bridge health monitoring, optimized structure design, make bridge management realize runing the surveying of overall process, controlled, guarantee the bridge security operation from building to; In addition, structure adopts the airflow design outward appearance novel, effectively raises the descending lane width of bridge, has improved the road-ability of road under the bridge.

Description of drawings

Below in conjunction with the accompanying drawing and the specific embodiment the utility model is done further explain.

Fig. 1 is a vertical type bridge pier structure elevation;

Fig. 2 is a vertical type bridge pier structure plan view;

Fig. 3 is a vertical type bridge pier structure side view;

Fig. 4 is a Y type bridge pier structure elevation;

Fig. 5 is a Y type bridge pier structure plan view;

Fig. 6 is a Y type bridge pier structure side view.

Wherein: pile foundation 1, cushion cap 2, right cylinder 3, Y type column 4, bent cap 5, fiber Bragg grating strain sensor 6, static level gauge 7.

The specific embodiment

In following two embodiment of the utility model, in the said prestressed concrete, maximum chloride ion content is 0.06%, and minimum cement dosage is 350kg/m3, and maximum water/binder ratio is 0.50, and maximum alkali content is 1.8kg/m3; Its reinforced concrete structure, maximum chloride ion content are 0.15%, and minimum cement dosage is 300kg/m3, and maximum water/binder ratio is 0.50, and maximum alkali content is 1.8kg/m3.

Embodiment one

Vertical type bridge pier such as Fig. 1, Fig. 2 and shown in Figure 3.Comprise pile foundation 1, cushion cap 2, right cylinder 3, bent cap 5 and be installed in fiber Bragg grating strain sensor 6 and the static level gauge 7 on the bent cap 5.Bent cap 5 adopts the big cantilever of degree of uprising of 805cm, bent cap 5 root section height 2.2m, bent cap 5 end section height 1.2m.Two straight formula column 3 transverse width 180cm, vertical bridge is to 180cm.Base form adopts the pile foundation 1 of four diameter 1.8m to connect the thick cushion cap of 2.5m 2.Four pile bases 1 connect as a whole through cushion cap 2, can improve structure bearing capacity and stability.The vertical type bridge pier adopts straight formula column 3 to design effectively, and control structure takies the lower space width.

Embodiment two

Y type bridge pier such as Fig. 4, Fig. 5 and shown in Figure 6.Comprise pile foundation 1, cushion cap 2, Y type column 4, bent cap 5 and be installed in fiber Bragg grating strain sensor 6 and the static level gauge 7 on the bent cap 5.Y type bridge pier bent cap 5 adopts the big semi girder of degree of uprising of 650cm, bent cap 5 root section height 2.2m, bent cap 5 end section height 1.2m.Two Y type columns, 4 transverse width I 80cm, vertical bridge is to 180cm.Base form adopts the pile foundation 1 of four diameter 1.8m to connect the thick cushion cap of 2.5m 2.Four pile bases 1 connect as a whole structure bearing capacity and the stability of improving through cushion cap 2.

Among above-mentioned two embodiment, the health monitoring of bent cap 5 adopts fiber Bragg grating strain sensor 5 and static level gauge 5.Characteristics such as the fiber grating type sensor has the accuracy height, and dependable performance is anti-interference anticorrosive, and durability is strong more can ensure stability and reliability than the other types sensor.

Above content is the further explain that combines concrete preferred implementation that the utility model is done, and can not assert that the practical implementation of the utility model is confined to these explanations.For the those of ordinary skill of technical field under the utility model, under the prerequisite that does not break away from the utility model design, can also make some simple deduction or replace, all should be regarded as belonging to the protection domain of the utility model.

Claims

1. the urban viaduct bridge pier of the big cantilever bent cap of prestressed concrete comprises: pile foundation, cushion cap, column, bent cap; It is characterized in that: fiber Bragg grating strain sensor and static level gauge are installed on the said bent cap.

2. the urban viaduct bridge pier of the big cantilever bent cap of prestressed concrete according to claim 1 is characterized in that: said column is a right cylinder.

3. the urban viaduct bridge pier of the big cantilever bent cap of prestressed concrete according to claim 1 is characterized in that: said column is a Y type column.

4. the urban viaduct bridge pier of the big cantilever bent cap of prestressed concrete according to claim 2 is characterized in that: said bent cap is the big cantilever of the degree of uprising of 805cm, its root section height 2.2m, its end section height 1.2m; Said two right cylinder transverse width 180cm, its vertical bridge is to 180cm; Said pile foundation diameter 1.8m; The thick 2.5m of said cushion cap; Said pile foundation is four, connects as a whole through cushion cap.

5. the urban viaduct bridge pier of the big cantilever bent cap of prestressed concrete according to claim 3 is characterized in that: said bent cap is the big semi girder of the degree of uprising of 650cm, its root section height 2.2m, its end section height 1.2m; Said two Y type column transverse width 180cm, its vertical bridge is to 180cm; Said pile foundation diameter 1.8m; The thick 2.5m of said cushion cap; Said pile foundation is four, connects as a whole through cushion cap.