阅读说明：本技术 带叠层橡胶的整体式桥台-钢管混凝土桩节点及施工方法 (Integral abutment-steel pipe concrete pile node with laminated rubber and construction method ) 是由 赵秋红 董硕 王晴薇 于 2019-11-28 设计创作，主要内容包括：本发明涉及一种带叠层橡胶的整体式桥台-钢管混凝土桩节点,包括混凝土桥台和钢管混凝土桩,其特征在于,在钢管混凝土桩的顶部设置叠层橡胶装置,所述的叠层橡胶装置包括叠层橡胶,所述叠层橡胶由橡胶片和加劲钢板分层交替叠合而成。本发明还给出上述节点的施工方法。本发明可以提高桥台-桩节点的侧向位移能力。(The invention relates to an integral abutment-steel pipe concrete pile node with laminated rubber, which comprises a concrete abutment and a steel pipe concrete pile. The invention also provides a construction method of the node. The invention can improve the lateral displacement capability of the abutment-pile node.)

1. The integral abutment-steel pipe concrete pile node with the laminated rubber comprises a concrete abutment and a steel pipe concrete pile and is characterized in that a laminated rubber device is arranged at the top of the steel pipe concrete pile and comprises laminated rubber, and the laminated rubber is formed by alternately laminating rubber sheets and stiffening steel plates in a layered mode.

2. The integral abutment-steel tube concrete pile node according to claim 1, wherein the laminated rubber is formed by alternately laminating rubber sheets and stiffening steel plates and then vulcanizing and bonding the laminated rubber at high temperature.

3. The integral abutment-steel pipe concrete pile node according to claim 1, wherein the laminated rubber device further comprises a rubber protection layer, and the rubber protection layer is coated on the periphery of the laminated rubber to prevent the stiffening steel plate from being rusted.

4. The integral abutment-steel tube concrete pile node of claim 1, wherein an end plate is attached to the top of the laminated rubber unit.

5. The integral abutment-concrete filled steel tube pile node according to claim 1, wherein the concrete filled steel tube pile embedded in the abutment portion and the laminated rubber device are wrapped with rubber plates.

6. The construction method of an integral abutment-steel pipe concrete pile node according to claim 1, comprising the steps of:

(1) filling the pile foundation with the soil behind the pile foundation in the height range, and driving the prefabricated concrete-filled steel tube pile.

(2) The laminated rubber device is prefabricated by a high temperature vulcanization method.

(3) After the laminated rubber device is connected with the steel pipe concrete pile top plate through the bolt, the steel pipe concrete pile top plate is welded with the steel sheet outside the steel pipe concrete pile, and the laminated rubber device is connected with the top of the steel pipe concrete pile.

(4) And rubber plates are wrapped in the range from the part of the steel pipe concrete pile embedded into the bridge abutment to the height of the top plate of the laminated rubber device.

(5) And (4) vulcanizing and bonding the contact position of the end plate and the top of the rubber plate at high temperature, and then connecting the end plate and the top plate of the laminated rubber device through a bolt.

(6) And (3) pouring a pile cap, erecting a main beam on the pile cap, paving a bridge deck, integrally pouring the main beam and the abutment together, backfilling the post-abutment soil and pouring a butt strap.

Technical Field

The invention belongs to the field of integral abutment bridge structure design, and particularly relates to an integral abutment-steel pipe concrete pile node with a laminated rubber device.

Background

In order to solve the problem of expansion and contraction deformation of a bridge under the action of temperature, expansion joints are arranged in the traditional method, but the expansion joints are easily damaged under the normal working state due to the influences of factors such as rainwater erosion, foreign matter filling, vehicle load, foundation settlement and the like, so that the integral abutment bridge without the expansion device and the support at the abutment is provided, the beam end of the integral abutment bridge is directly poured with the abutment into a whole, and the problem of damage of the bridge expansion joints is fundamentally solved. But the deformation and the force of the upper structure of the bridge are directly transmitted to the lower structure, and higher requirements are put on the deformation capability of the lower structure. The concrete piles commonly used in China are applied to the integral abutment bridge, so that the stress of the upper structure and the pile foundation of the bridge is large due to the problems of large rigidity, poor deformability and the like of the integral abutment bridge, and the popularization and the application of the integral abutment bridge are influenced. The method adopted for improving the displacement capacity of the pile foundation is to arrange the pile orientation to bend around a weak axis and pre-drill the pile top, wherein the pile orientation to bend around the weak axis can cause local damage at the bridge abutment-pile interface, and the pre-drilling effect of the pile top is not obvious. Both of the above two methods are based on the conventional approach of an integral abutment-pile joint, i.e. directly embedding a steel pile into a concrete abutment. The method ensures that the rigidity of the node is higher, the deformation capability is poor, and the pile foundation is easy to damage. Research shows that after the pile top is hinged, the lateral rigidity of the pile is obviously reduced, the maximum bending moment of the pile body is reduced, and the lateral displacement capacity is increased. Therefore, the integral bridge abutment-pile node is a stress key point of the structure, and the normal use performance and the seismic performance of the bridge system can be improved by improving the integral bridge abutment-pile node. To sum up, in order to build longer integral abutment bridges, abutment-pile joints that can accommodate larger deformations need to be proposed.

Disclosure of Invention

The invention aims to provide an integral abutment-steel pipe concrete pile node with a laminated rubber device. The above purpose is realized by the following technical scheme:

the integral abutment-steel pipe concrete pile node with the laminated rubber comprises a concrete abutment and a steel pipe concrete pile and is characterized in that a laminated rubber device is arranged at the top of the steel pipe concrete pile and comprises laminated rubber, and the laminated rubber is formed by alternately laminating rubber sheets and stiffening steel plates in a layered mode.

Preferably, the laminated rubber is formed by alternately laminating rubber sheets and stiffening steel plates and then vulcanizing and bonding the laminated rubber at high temperature.

The laminated rubber device further comprises a rubber protective layer, and the rubber protective layer is coated on the periphery of the laminated rubber and used for preventing the stiffening steel plate from being corroded.

The top of the laminated rubber device is connected with an end plate.

Rubber plates are wrapped around the steel pipe concrete pile embedded bridge platform part and the laminated rubber device.

The invention also provides a construction method of the integral abutment-steel pipe concrete pile joint, which comprises the following steps:

(1) filling the pile foundation with the soil behind the pile foundation in the height range, and driving the prefabricated concrete-filled steel tube pile.

(2) The laminated rubber device is prefabricated by a high temperature vulcanization method.

(3) After the laminated rubber device is connected with the steel pipe concrete pile top plate through the bolt, the steel pipe concrete pile top plate is welded with the steel sheet outside the steel pipe concrete pile, and the laminated rubber device is connected with the top of the steel pipe concrete pile.

(4) And rubber plates are wrapped in the range from the part of the steel pipe concrete pile embedded into the bridge abutment to the height of the top plate of the laminated rubber device.

(5) And (4) vulcanizing and bonding the contact position of the end plate and the top of the rubber plate at high temperature, and then connecting the end plate and the top plate of the laminated rubber device through a bolt.

(6) And (3) pouring a pile cap, erecting a main beam on the pile cap, paving a bridge deck, integrally pouring the main beam and the abutment together, backfilling the post-abutment soil and pouring a butt strap.

In summary, due to the adoption of the technical scheme, the invention has the beneficial effects that:

when the steel pipe concrete pile is embedded into the bridge abutment and partially wraps the rubber plate, the deformation of the rubber plate can be used for bearing the node deformation under the temperature action, the rigidity of the structure is further reduced, the response of a node area under the earthquake action can be reduced, and the pile end is protected from being damaged; the laminated rubber device has simple structure, convenient processing and manufacturing, low cost and steel saving, and can reduce the impact of earthquake load on the bridge structure and abutment and improve the stress performance of the bridge by placing the laminated rubber device on the top of the steel pipe concrete pile; after the steel pipe concrete pile is driven, the rubber plate and the laminated rubber device are installed, so that the performance of the connecting node is similar to that of a hinged node, and the lateral displacement capacity of the bridge abutment-pile node is greatly improved; the method can reduce the anti-seismic requirement of the integral abutment-pile node, improve the limit value requirement of the span length of the integral abutment bridge, and promote the use and popularization of the integral abutment bridge.

Drawings

Fig. 1 is a schematic diagram of the overall structure of the invention.

Fig. 2 is a schematic view of a partial construction of the pile top.

FIG. 3 is a schematic view of a laminated rubber unit.

Numerical labeling: 1-a concrete abutment; 2-steel pipe concrete pile; 3-a laminated rubber device; 4-steel pipe concrete pile top plate; 5-a bottom plate; 6-a rubber plate; 7-an end plate; 8-laminating the rubber device top plate; 9-a butt strap; 10-one bed of back soil; 11-a main beam; 12-a bridge deck; 13-a shear key; 14-a protective layer of rubber; 15-rubber sheet; 16-a stiffened steel plate; 17-bolt hole; 18-laminated rubber.

Detailed Description

The present invention will be further illustrated below with reference to specific embodiments, which are to be understood as merely illustrative and not limitative of the scope of the present invention.

As shown in fig. 1, the integral abutment-steel pipe concrete pile node with rubber plates and laminated rubber devices of the present embodiment. Comprises a concrete abutment 1, a steel pipe concrete pile 2, a rubber plate 6 and a laminated rubber device 3. The top of the steel pipe concrete pile 2 is provided with a laminated rubber device 3.

As shown in figure 1, the top of the laminated rubber device 3 is connected with an end plate 7, and the part of the steel pipe concrete pile 2 embedded in the abutment 1 and the periphery of the laminated rubber device 3 are wrapped with rubber plates 6.

As shown in fig. 2, in this embodiment, the top of the steel pipe concrete pile 2 is welded to the steel pipe concrete pile top plate 4. The steel pipe concrete pile 2 has excellent anti-seismic performance and high construction efficiency.

As shown in fig. 2, in this embodiment, the laminated rubber unit 3 is bolted to the steel pipe concrete pile top plate 4.

As shown in fig. 3, in this embodiment, the laminated rubber 18 is made by alternately laminating the rubber sheets 15 and the stiffening steel plates 16 and then vulcanizing and bonding them at high temperature, and has the advantages of simple structure, convenient processing and manufacturing, low cost and steel saving. The upper surface, the lower surface and the periphery of the laminated rubber 18 are provided with rubber protective layers 14 to prevent the stiffening steel plates 16 from being rusted.

As shown in fig. 3, in this embodiment, the top and bottom of the laminated rubber 18 are attached to the top and bottom plates 8 and 5, respectively, of the laminated rubber unit by a high temperature vulcanization process. The laminated rubber 18, the laminated rubber device top plate 8 and the laminated rubber device bottom plate 5 can be directly prefabricated into the laminated rubber device 3 in a factory, and the field construction efficiency is improved.

In this embodiment, as shown in fig. 2, the concrete filled steel tubular pile 2 is embedded in the abutment 1 and the rubber laminate 3 is wrapped with a rubber sheet 6.

In this embodiment, as shown in fig. 2, shear keys 13 are provided on the top of the end plates 7 to enhance the integrity of the node and improve the pull-out resistance of the node.

In this embodiment, as shown in fig. 2, the contact position of the end plate 7 with the top of the rubber plate 6 is bonded by high temperature vulcanization, and is connected with the top plate 8 of the laminated rubber device by bolts.

In this embodiment, as shown in fig. 2, the steel pipe concrete pile top plate 4, bottom plate 5, laminated rubber device top plate 8 and end plate 7 are provided with bolt holes.

The concrete construction steps of the integral abutment-steel pipe concrete pile node with the rubber plate and the laminated rubber device are as follows:

(1) filling the soil behind the platform within the height range of the pile foundation, and driving the prefabricated concrete-filled steel tube pile 2.

(2) The top and bottom of the laminated rubber 18 are connected to the top plate 8 and the bottom plate 5, respectively, of the laminated rubber unit by a high temperature vulcanization method. The laminated rubber 18, the laminated rubber device top plate 8 and the laminated rubber device bottom plate 5 can be directly prefabricated into the laminated rubber device 3 in a factory, and the field construction efficiency is improved.

(3) After the laminated rubber device 3 is connected with the steel pipe concrete pile top plate 4 through bolts, the steel pipe concrete pile top plate 4 is welded with the outer steel sheet of the steel pipe concrete pile 2, and then the laminated rubber device 3 is connected with the top of the steel pipe concrete pile 2.

(4) The rubber plate 6 is wrapped in the range of the height from the part of the steel pipe concrete pile 2 embedded into the bridge abutment 1 to the top plate 8 of the laminated rubber device.

(5) The contact position of the end plate 7 and the top of the rubber plate 6 is vulcanized and bonded at high temperature and then is connected with the top plate 8 of the laminated rubber device through a bolt.

(6) And (3) pouring a pile cap (the lower half part of the bridge abutment 1), erecting a main beam 11 on the pile cap, and paving a bridge deck 12. And integrally pouring the main beam 11 and the abutment 1 together, backfilling the post-abutment soil 10 and pouring the butt strap 9.

The above description is only of the preferred embodiments of the present invention, and it should be noted that: it will be apparent to those skilled in the art that various modifications and finishes can be made to the integral abutment-steel pipe concrete pile node with rubber slab and laminated rubber devices without departing from the principles of the invention, and such modifications and finishes are also considered to be within the scope of the invention.