CN214194098U

CN214194098U - Integral abutment-H-shaped steel pile node anti-seismic structure locally using rubber concrete

Info

Publication number: CN214194098U
Application number: CN202022397572.1U
Authority: CN
Inventors: 赵秋红; 张冀豪; 齐朝阳
Original assignee: Tianjin University
Current assignee: Tianjin University
Priority date: 2020-10-26
Filing date: 2020-10-26
Publication date: 2021-09-14
Anticipated expiration: 2030-10-26

Abstract

The utility model discloses an integral abutment-H shaped steel stake node antidetonation structure of local use rubber concrete, including the abutment with along the length embedding of abutment to the H shaped steel stake in the abutment, the rubber concrete of embedding to the concrete abutment is pour to the periphery at H shaped steel stake top, the intensity of rubber concrete is unanimous basically with the intensity of the concrete that constitutes the abutment. The common concrete or the corrugated sleeves are arranged between the rubber concrete and the side surfaces of the abutment along the length direction of the abutment. The utility model discloses a node antidetonation structure has improved the turnability of integral abutment-H shaped steel pile node, has reduced lateral rigidity, has increased the longitudinal bridge of top structure to the volume of allowing horizontal displacement, has improved the ductility and the anti-cracking performance of integral abutment-H shaped steel pile node department concrete, has improved the anti-seismic performance of node. The use of the rubber concrete is beneficial to solving the problems of environmental protection and resource shortage caused by waste rubber, and the social effect is obvious.

Description

Integral abutment-H-shaped steel pile node anti-seismic structure locally using rubber concrete

Technical Field

The utility model relates to an integral abutment bridge anti-seismic performance optimal design field especially relates to an improvement of integral abutment-H shaped steel stake node anti-seismic performance.

Background

Among the traditional bridge structures, the support and the expansion joint of abutment department are the weak position in the bridge, under the external environment effect with when the earthquake takes place, take place to destroy or become invalid easily to influenced the normal use of bridge, improved the maintenance cost. The integral bridge is provided with the telescopic device and the support at the abutment, the beam end is directly cast with the abutment into a whole, and the deformation of the main beam is mainly adapted by the deformation of the abutment, the foundation and the soil; the displacement earthquake damage of the upper structure is reduced in the earthquake process, the earthquake damage of the support at the bridge abutment is avoided, the beam end is directly poured with the bridge abutment into a whole, the integrity of the structure is increased, and the earthquake damage of the bridge pier is reduced.

To maximize the flexibility of the foundation to accommodate superstructure deformation, the foundation of the integral abutment is typically formed with a single row of piles. The bridge design in China has more applications to concrete piles, but the horizontal deformation capacity of the reinforced concrete pile is obviously lower than that of a steel pile, the reinforced concrete pile is easy to crack under the action of lateral cyclic load to cause reinforcement corrosion, the anti-seismic performance and the energy consumption performance are poor, and the pile is difficult to repair after being damaged. In addition, in a site with complex geological conditions and large rock surface fluctuation, the concrete pile is difficult to be driven. Therefore, the H-shaped steel pile which is widely applied in foreign engineering is more suitable for the foundation of the integral abutment.

The rubber concrete is a novel green environment-friendly building material prepared by doping waste rubber tire particles into a cement concrete mixture. The method not only improves the mechanical property of the concrete, but also solves the problem of black pollution caused by waste tires. Compared with common concrete, the rubber aggregate concrete has the advantages of good ductility and toughness, excellent crack resistance, good durability, small density, good impact resistance, heat insulation and sound insulation and the like. Meanwhile, the reinforced rubber concrete member has good ductility and energy consumption capability, and is suitable for building structures with high earthquake resistance requirements.

Under the action of earthquake, the integral bridge abutment and the steel pile foundation absorb the deformation of the upper structure and coordinate the integral stress of the bridge, and the integral bridge abutment-steel pile node is one of key points in the stress process. In engineering, the H-shaped steel piles are directly embedded into the abutment, and a certain embedding length is ensured. When an earthquake occurs, the pile head of the steel pile directly contacts and extrudes with concrete at the node of the bridge abutment, the deformation capability of the concrete is low, the steel pile is easy to crack and locally crush, and the ductility of the structure is influenced, so that the integral bridge abutment-steel pile node needs to be improved.

SUMMERY OF THE UTILITY MODEL

To the above-mentioned prior art, the utility model provides an integral abutment-H shaped steel stake node antidetonation structure of rubber concrete is used locally, the utility model discloses the antidetonation structure that forms not only structural design is reasonable, and construction convenience practices thrift the time limit for a project moreover.

In order to solve the technical problem, the utility model provides an integral abutment-H shaped steel pile node antidetonation structure of local use rubber concrete, including abutment and H shaped steel pile, the upper portion of H shaped steel pile imbeds to in the abutment along the length of abutment, the periphery at H shaped steel pile top has pour rubber concrete, the depth that rubber concrete imbeds to the concrete abutment is greater than the depth that H shaped steel pile imbeds to the concrete abutment; the abutment is a concrete abutment formed by concrete poured on the periphery and the top of the rubber concrete part; the rubber concrete consists of concrete and rubber particles, wherein the mixing amount of the rubber is 5-15%, the particle size of the rubber particles is 0.85-4.75mm, and the strength of the rubber concrete is basically consistent with that of the concrete forming the abutment.

Further, integral abutment-H shaped steel stake node antidetonation structure, wherein H shaped steel stake embedding the within range of abutment, edge abutment length with rubber concrete alternate be equipped with the concrete.

A corrugated sleeve is arranged between the rubber concrete and the side face of the bridge abutment, and a distance is reserved between the inner side face of the corrugated sleeve and the H-shaped steel pile. The depth of the corrugated sleeve embedded into the concrete bridge abutment is equal to the depth of the rubber concrete embedded into the concrete bridge abutment.

The height and the width of the H-shaped steel pile are not more than 350mm and 370 mm; the depth of the H-beam piles embedded in the concrete bridge abutment is determined according to the sufficient anchoring provided for the H-beam piles.

Compared with the prior art, the beneficial effects of the utility model are that:

(1) the H-shaped steel pile has small soil squeezing volume and pile sinking resistance and strong penetrating power, and is suitable for the condition that the concrete pile is difficult to construct and beat. In addition, the flexibility of the structure and the longitudinal bridge direction deformability of the bridge are improved by the H-shaped steel piles, and the allowable horizontal displacement of the longitudinal bridge direction is increased.

(2) Because the part of the H-shaped steel pile embedded into the bridge abutment is locally made of rubber concrete with lower elastic modulus and larger deformability, the rotation capability of the bridge abutment-H-shaped steel pile node is improved, the flexibility of the structure and the longitudinal bridge deformation capability of the bridge are further improved, and the allowable horizontal displacement of the longitudinal bridge is further improved.

(3) Because the rubber concrete with higher ductility and crack resistance is locally adopted at the part of the H-shaped steel pile embedded into the bridge abutment, the lateral rigidity of the structure and the earthquake force acting on the node are reduced, the crushing of the local concrete at the node and the plastic deformation of the steel pile under the earthquake action are reduced, and the repair cost after the earthquake is reduced.

(4) Because the well small span bridge figure that is applicable to the reconstruction of integral abutment bridge is huge, the utility model provides a rubber concrete can improve the rate of recovery of present abandonment rubber, uses rubber concrete on the construction and the old bridge reconstruction of integral abutment bridge, is favorable to solving environmental protection and the resource deficiency problem that abandonment rubber brought, and social effect is showing.

Drawings

Fig. 1 is a schematic front view structural diagram of an integral abutment-H-shaped steel pile node seismic-resistant structure of the present invention;

fig. 2 is a sectional structure diagram of the cut-off position A-A in fig. 1.

In the figure: 1-abutment, 2-rubber concrete, 3-H-shaped steel pile and 4-corrugated sleeve.

Detailed Description

In the description of the present invention, it should be noted that the terms "upper", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention.

The present invention will be further described with reference to the following drawings and specific examples, but the following examples are by no means limiting the present invention.

The utility model provides an integral abutment-H shaped steel stake node antidetonation structure of rubber concrete is used locally, and its aim at overcomes node concrete deformability is lower, and easy fracture and local crushing under the seismic action influence the ductile shortcoming of structure. The advantages of low elastic modulus, high deformation capacity and high ductility and crack resistance of the rubber concrete are fully utilized, the horizontal deformation capacity of the longitudinal bridge of the structure is improved, the lateral rigidity of the structure and the seismic force acting on the node are reduced, the damage of local concrete at the node and the plastic deformation of the steel pile under the action of the earthquake are reduced, and the repair cost after the earthquake is reduced.

As shown in fig. 1 and fig. 2, the utility model provides an integral abutment-H shaped steel pile node anti-seismic structure using rubber concrete locally, including abutment 1 and H shaped steel pile 3, the upper portion of H shaped steel pile 3 is embedded into abutment 1 along the length of abutment 1, rubber concrete 2 is poured around the top of H shaped steel pile 3, the depth of embedding rubber concrete 2 into the concrete abutment is greater than the depth of embedding H shaped steel pile 3 into the concrete abutment; the abutment 1 is a concrete abutment formed by concrete poured on the periphery and the top of the rubber concrete 2; the rubber concrete 2 is composed of concrete and rubber particles, wherein the rubber mixing amount is 5% -15%, the particle size of the rubber particles is 0.85-4.75mm, in specific implementation, the rubber concrete 2 can be a novel green environment-friendly building material prepared by mixing particles made of waste rubber into a cement concrete mixture, the novel green environment-friendly building material is poured on the periphery and the top of the pile top of the H-shaped steel pile 3 embedded into the bridge abutment 1, and the strength of the rubber concrete 2 is basically consistent with that of the concrete forming the bridge abutment 1.

Concrete is alternately arranged between the H-shaped steel pile 3 and the rubber concrete 2 along the length of the bridge abutment 1 in the range that the H-shaped steel pile 3 is embedded into the bridge abutment 1.

A corrugated sleeve 4 is arranged between the rubber concrete 2 and the side surface of the abutment 1, and the corrugated sleeve 4 restrains the rubber concrete 2 poured before the abutment; a distance is reserved between the inner side surface of the corrugated sleeve 4 and the H-shaped steel pile 3. The depth of the corrugated sleeve 4 embedded into the concrete bridge abutment is equal to the depth of the rubber concrete 2 embedded into the concrete bridge abutment.

The height and the width of the H-shaped steel pile 3 are not more than 350mm and 370 mm; the depth of the H-shaped steel piles 3 embedded in the concrete abutment 1 is determined according to the sufficient anchoring provided to the H-shaped steel piles 3.

The utility model discloses an integral abutment-H shaped steel pile node antidetonation structure has improved the turnability of integral abutment-H shaped steel pile node, has reduced lateral rigidity, has increased the longitudinal bridge of top structure to the volume of allowing horizontal displacement, has improved the ductility and the anti-cracking performance of integral abutment-H shaped steel pile node department concrete, has improved the anti-seismic performance of node. The use of the rubber concrete is beneficial to solving the problems of environmental protection and resource shortage caused by waste rubber, and the social effect is obvious.

The construction method for improving the integral abutment-H-shaped steel pile node earthquake-resistant structure by adopting the rubber concrete comprises the following steps:

as shown in fig. 1 and 2, the H-shaped steel piles 3 are prefabricated members, and may be formed by rolling or welding flange plates and webs, and the pile type is preferably no greater than HP350 × 370. The depth of the H-section steel piles 3 embedded in the concrete abutment 1 should be sufficient to provide sufficient anchorage for the H-section steel piles 3.

The rubber mixing amount of the rubber 2 part is 5-15%, the particle size of the rubber particles is 0.85-4.75mm, and the strength of the rubber concrete is similar to that of the bridge abutment concrete, so that sufficient deformation and bearing capacity of the integral bridge abutment-H-shaped steel pile node are provided.

The diameter of the corrugated sleeve 4 can completely accommodate the section of the H-shaped steel pile 3, and a certain space is reserved. The corrugated sleeve 4 should be embedded deeper into the concrete abutment 1 than the H-shaped steel piles 3.

The H-shaped steel pile 3 is large in pile shape, rubber concrete 2 and common concrete need to be used along the length of the bridge abutment 1 within the embedding depth range in an alternating mode, and the corrugated sleeve 4 is not used any more.

Although the present invention has been described with reference to the accompanying drawings, the present invention is not limited to the above embodiments, which are only illustrative and not restrictive, and those skilled in the art can make many modifications without departing from the spirit of the present invention.

Claims

1. An integral abutment-H-shaped steel pile node anti-seismic structure locally using rubber concrete comprises an abutment (1) and H-shaped steel piles (3), wherein the upper parts of the H-shaped steel piles (3) are embedded into the abutment (1) along the length of the abutment (1), the integral abutment-H-shaped steel pile node anti-seismic structure is characterized in that rubber concrete (2) is poured on the periphery of the top of each H-shaped steel pile (3), and the abutment (1) is a concrete abutment formed by concrete poured on the periphery and the top of part of the rubber concrete (2); the depth of the rubber concrete (2) embedded into the concrete bridge abutment is greater than the depth of the H-shaped steel pile (3) embedded into the concrete bridge abutment; the rubber concrete (2) consists of concrete and rubber particles, wherein the particle size of the rubber particles is 0.85-4.75mm, and the strength of the rubber concrete (2) is basically consistent with that of the concrete forming the bridge abutment (1).

2. The integral abutment-H-beam pile node seismic structure according to claim 1, characterized in that concrete is provided along the length of the abutment (1) alternating with the rubber concrete (2) within the range where the H-beam piles (3) are embedded in the abutment (1).

3. The integral abutment-H-shaped steel pile node anti-seismic structure according to claim 1, characterized in that a corrugated sleeve (4) is arranged between the rubber concrete (2) and the side surface of the abutment (1), and a distance is reserved between the inner side surface of the corrugated sleeve (4) and the H-shaped steel pile (3).

4. The integral abutment-H-shaped steel pile node seismic structure according to claim 3, characterized in that the depth of embedding of the corrugated sleeve (4) into the concrete abutment is equal to the depth of embedding of the rubber concrete (2) into the concrete abutment.

5. The integral abutment-H-shaped steel pile node seismic structure according to claim 1, characterized in that the H-shaped steel pile (3) has a height by width not greater than 350mm by 370 mm; the depth of the H-shaped steel pile (3) embedded into the concrete bridge abutment (1) is determined according to the sufficient anchoring provided for the H-shaped steel pile (3).