阅读说明：本技术 一种装配式混凝土双层门式墩结构及施工方法 (Fabricated concrete double-layer gate-type pier structure and construction method ) 是由 康俊涛 杨国林 于 2021-06-04 设计创作，主要内容包括：本发明公开了一种装配式混凝土双层门式墩结构及施工方法,该双层门式墩结构包括：墩柱基础、下立柱、下盖梁、左立柱、右立柱、上盖梁；所述墩柱基础上设有预埋的外伸连接钢筋；所述下立柱下端设置有灌浆套筒,其上端设有预埋的外伸连接钢筋；所述下盖梁下端设置有灌浆套筒,其上端左侧、上端右侧设有预埋的外伸连接钢筋；所述左立柱和右立柱下端均设置有灌浆套筒,左立柱和右立柱上端设有预埋的外伸连接钢筋；所述上盖梁下端左侧和下端右侧设置灌浆套筒；所述墩柱基础与下立柱、下立柱与下盖梁、下盖梁与左立柱和右立柱、左立柱和右立柱和上盖梁均通过灌浆套筒连接。本发明性能可靠,操作简单,可以保证装配式门式墩施工速度和质量。(The invention discloses an assembly type concrete double-layer gate-type pier structure and a construction method, wherein the double-layer gate-type pier structure comprises: the pier foundation, the lower upright post, the lower bent cap, the left upright post, the right upright post and the upper bent cap; the pier stud foundation is provided with a pre-embedded overhanging connecting steel bar; the lower end of the lower upright post is provided with a grouting sleeve, and the upper end of the lower upright post is provided with a pre-embedded overhanging connecting steel bar; the lower end of the lower bent cap is provided with a grouting sleeve, and the left side and the right side of the upper end of the lower bent cap are provided with embedded overhanging connecting steel bars; grouting sleeves are arranged at the lower ends of the left stand column and the right stand column, and embedded overhanging connecting steel bars are arranged at the upper ends of the left stand column and the right stand column; grouting sleeves are arranged on the left side of the lower end of the upper bent cap and the right side of the lower end of the upper bent cap; pier foundation and lower stand, lower stand and lower bent cap, lower bent cap and left stand and right stand, left stand and right stand and last bent cap all pass through grout muffjoint. The invention has reliable performance and simple operation, and can ensure the construction speed and quality of the assembled gate pier.)

1. The utility model provides an assembled concrete double-deck gate-type pier structure which characterized in that includes following prefabricated component: the pier foundation, the lower upright post, the lower bent cap, the left upright post, the right upright post and the upper bent cap;

the pier stud foundation is provided with a pre-embedded overhanging connecting steel bar;

the lower end of the lower upright post is provided with a grouting sleeve, and the upper end of the lower upright post is provided with a pre-embedded overhanging connecting steel bar;

the lower end of the lower bent cap is provided with a grouting sleeve, and the left side and the right side of the upper end of the lower bent cap are provided with embedded overhanging connecting steel bars;

grouting sleeves are arranged at the lower ends of the left stand column and the right stand column, and embedded overhanging connecting steel bars are arranged at the upper ends of the left stand column and the right stand column;

grouting sleeves are arranged on the left side of the lower end of the upper bent cap and the right side of the lower end of the upper bent cap;

pier foundation and lower stand, lower stand and lower bent cap, lower bent cap and left stand and right stand, left stand and right stand and last bent cap all pass through grout muffjoint.

2. The fabricated concrete double-layered gate-type pier structure according to claim 1, wherein the grouting sleeve of the lower column is provided at a lower middle portion of the lower column.

3. The fabricated concrete double-layer gate-type pier structure as claimed in claim 1, wherein one end of a grouting sleeve of the prefabricated member is sleeved with embedded steel bars used for being connected with the grouting sleeve, the other end of the grouting sleeve of the prefabricated member is connected with the extended connecting steel bars of the prefabricated member to be connected, a communication cavity is formed at one end, close to the connection of the prefabricated member, of the plurality of grouting sleeves, the communication cavity and the grouting sleeve form a grouting bin, and a grouting opening and a grout outlet which are communicated with the outside are respectively formed in the grouting sleeve.

4. The fabricated concrete double-layer gate-type pier structure as claimed in claim 1, wherein the pre-embedded overhanging connecting steel bars and the pre-set sleeves are arranged in three pairs at each joint, and communication cavities are arranged between the three pairs of pre-embedded steel bars and the sleeves to jointly form a communicated grouting area.

5. A construction method of an assembly type concrete double-layer gate pier structure is characterized by comprising the following steps:

1) preparing a prefabricated part: the pier foundation, the lower upright post, the lower bent cap, the left upright post, the right upright post and the upper bent cap;

the pier stud foundation is provided with a pre-embedded overhanging connecting steel bar;

the lower end of the lower upright post is provided with a sleeve, and the upper end of the lower upright post is provided with a pre-embedded overhanging connecting steel bar;

the lower end of the lower bent cap is provided with a sleeve, and the left side and the right side of the upper end of the lower bent cap are provided with embedded overhanging connecting steel bars;

sleeves are arranged at the lower ends of the left upright post and the right upright post, and embedded overhanging connecting steel bars are arranged at the upper ends of the left upright post and the right upright post;

sleeves are arranged on the left side of the lower end of the upper bent cap and the right side of the lower end of the upper bent cap;

2) connecting a grouting sleeve between the pier stud foundation and the lower upright post;

3) connecting a grouting sleeve between the lower upright post and the lower bent cap;

4) grouting sleeve connection is carried out between the left upright post, the right upright post and the lower bent cap;

5) and (5) performing grouting sleeve connection between the left upright post, the right upright post and the upper capping beam.

6. The construction method of the assembled concrete double-layer gate-type pier structure according to claim 5, wherein the grouting sleeve connection is that connecting steel bars extending out of the prefabricated part provided with the embedded overhanging connecting steel bars are inserted into grouting sleeves, connected with the embedded steel bars, of the prefabricated part provided with the sleeves, grouting is started from any grouting port, grouting material flows through three sleeves on one side through the communication cavity until the grouting material flows out of the other two grouting ports to plug the other two grouting ports, the grouting port is plugged when the grouting material flows out of the grouting port, and after the plugging is finished, a grouting pipe is pulled out and the grouting port is plugged, so that the connection is completed.

7. The construction method of the fabricated concrete double-layer gate-type pier structure according to claim 5, wherein the grouting sleeve connection between the pier foundation and the lower column in the step 2) is performed as follows:

the connecting steel bars extending out of the pier stud foundation are inserted into the grouting sleeves connected with the embedded steel bars of the lower stand column, grouting is started from any grouting port, grouting material flows through the three sleeves on one side through the communicating cavity until the grouting material flows out of the other two grouting ports, the grouting ports are blocked when the grouting material flows out of the other two grouting ports, the grouting material is blocked when the grouting material flows out of the grouting ports, the grouting pipes are pulled out after the blocking is finished, and the grouting ports are blocked, so far, the connection is completed.

Technical Field

The invention relates to a bridge construction technology, in particular to an assembled concrete double-layer gate-type pier structure and a construction method.

Background

Under the background of increasingly tense urban land, the contradiction between insufficient time and limited conditions and the development of urban traffic networks becomes more and more severe.

The double-layer gate-type piers not only provide a new possibility for building double-layer bridges, but also can be prefabricated into double-layer gate-type piers with different sizes according to the requirements of line shapes and slopes in road design, so that the use efficiency of urban traffic is improved as much as possible in a limited urban space, the contradiction between urban land resources and bridge construction is relieved, and the double-layer gate-type piers are bound to become the development trend of urban bridges.

Meanwhile, the fabricated bridge structure is increasingly present in urban bridges due to its unique advantages. Compared with a construction method for cast-in-place of a full-hall bracket, the construction speed of the assembled bridge is high, the influence on surrounding traffic is small, meanwhile, manpower needed in the field is greatly reduced, and the safety is higher. On the other hand, the construction process of the assembled bridge is more attractive, the dust pollution, the noise pollution and the like to the surrounding environment are less, and the cleanness of the city is kept more favorably. In addition, the quality is unstable when the concrete is cast in place, and is influenced by the construction technology level, and the assembled components are prefabricated in a factory, so that the quality is stable and reliable.

Disclosure of Invention

The invention aims to solve the technical problem of providing an assembly type concrete double-layer portal pier structure and a construction method aiming at the defects in the prior art.

The technical scheme adopted by the invention for solving the technical problems is as follows:

an assembled concrete double-layer gate-type pier structure comprises the following prefabricated components: the pier foundation, the lower upright post, the lower bent cap, the left upright post, the right upright post and the upper bent cap;

the pier stud foundation is provided with a pre-embedded overhanging connecting steel bar;

the lower end of the lower upright post is provided with a grouting sleeve, and the upper end of the lower upright post is provided with a pre-embedded overhanging connecting steel bar;

the lower end of the lower bent cap is provided with a grouting sleeve, and the left side and the right side of the upper end of the lower bent cap are provided with embedded overhanging connecting steel bars;

grouting sleeves are arranged at the lower ends of the left stand column and the right stand column, and embedded overhanging connecting steel bars are arranged at the upper ends of the left stand column and the right stand column;

grouting sleeves are arranged on the left side of the lower end of the upper bent cap and the right side of the lower end of the upper bent cap;

pier foundation and lower stand, lower stand and lower bent cap, lower bent cap and left stand and right stand, left stand and right stand and last bent cap all pass through grout muffjoint.

According to the scheme, the grouting sleeve of the lower stand column is arranged in the middle of the lower end of the lower stand column.

According to the scheme, the embedded steel bars which are connected with the prefabricated part and used for the grouting sleeve are sleeved in one end of the grouting sleeve of the prefabricated part, the other end of the grouting sleeve of the prefabricated part is connected with the extending connecting steel bars of the prefabricated part to be connected, the end, close to the connection part of the prefabricated part, of the plurality of grouting sleeves is provided with the communicating cavity, the communicating cavity and the grouting sleeve form a grouting bin, and the grouting sleeve is provided with the grouting opening and the grout outlet which are communicated with the outside.

According to the scheme, three pairs of pre-buried steel bars and sleeves are arranged at each joint, and a communication cavity is arranged between each pair of pre-buried steel bars and each sleeve at one side to jointly form a communicated grouting area.

A construction method of an assembly type concrete double-layer gate pier structure comprises the following steps:

1) preparing a prefabricated part: the pier foundation, the lower upright post, the lower bent cap, the left upright post, the right upright post and the upper bent cap;

the pier stud foundation is provided with a pre-embedded overhanging connecting steel bar;

the lower end of the lower upright post is provided with a sleeve, and the upper end of the lower upright post is provided with a pre-embedded overhanging connecting steel bar;

the lower end of the lower bent cap is provided with a sleeve, and the left side and the right side of the upper end of the lower bent cap are provided with embedded overhanging connecting steel bars;

sleeves are arranged at the lower ends of the left upright post and the right upright post, and embedded overhanging connecting steel bars are arranged at the upper ends of the left upright post and the right upright post;

sleeves are arranged on the left side of the lower end of the upper bent cap and the right side of the lower end of the upper bent cap;

2) connecting a grouting sleeve between the pier stud foundation and the lower upright post;

inserting connecting reinforcing steel bars extending out of a pier stud foundation into grouting sleeves connected with embedded reinforcing steel bars of a lower stand column, starting grouting from any grouting opening, enabling grouting materials to flow through three sleeves on one side through a communicating cavity until the grouting materials flow out of the other two grouting openings, plugging a grout outlet when the grouting materials flow out of the grout outlet, and pulling out a grouting pipe and plugging the grouting openings after plugging is finished, so that connection is finished;

3) connecting a grouting sleeve between the lower upright post and the lower bent cap;

4) grouting sleeve connection is carried out between the left upright post, the right upright post and the lower bent cap;

5) and (5) performing grouting sleeve connection between the left upright post, the right upright post and the upper capping beam.

According to the above scheme, grout muffjoint is for inserting the connecting reinforcement that the prefabricated component that will be equipped with pre-buried overhanging connecting reinforcement stretches out into the grout sleeve that is equipped with telescopic prefabricated component and pre-buried steel bar connection, start the grout from arbitrary grout mouth, the three sleeve of one side is flowed through to the grout material through the intercommunication chamber, carry out the shutoff to two other grout mouths when flowing from two other grout mouths until the grout material, treat that the grout material carries out the shutoff to grout mouth when flowing from grout mouth, extract the slip casting pipe and carry out the shutoff to grout mouth after the shutoff finishes, so far accomplish and connect.

According to the scheme, the grouting sleeve connection between the pier stud foundation and the lower upright post is carried out as follows:

the connecting steel bars extending out of the pier stud foundation are inserted into the grouting sleeves connected with the embedded steel bars of the lower stand column, grouting is started from any grouting port, grouting material flows through the three sleeves on one side through the communicating cavity until the grouting material flows out of the other two grouting ports, the grouting ports are blocked when the grouting material flows out of the other two grouting ports, the grouting material is blocked when the grouting material flows out of the grouting ports, the grouting pipes are pulled out after the blocking is finished, and the grouting ports are blocked, so far, the connection is completed.

The invention has the following beneficial effects: the prefabricated concrete double-layer gate-type pier is prefabricated by the prefabricated concrete double-layer gate-type pier components, the prefabricated concrete double-layer gate-type pier components are prefabricated, the installation speed of the prefabricated concrete double-layer gate-type pier components is high, a double-layer bridge can be erected, double-layer gate-type piers of different sizes can be prefabricated according to the line shape and gradient requirements in road design, and the prefabricated concrete double-layer gate-type pier has wide application prospects in urban bridge construction.

Drawings

The invention will be further described with reference to the accompanying drawings and examples, in which:

FIG. 1 is a schematic structural view of an assembled concrete double-layer gate pier structure according to the present invention;

FIG. 2 is a schematic sectional elevation view of grout sleeve connection and construction between prefabricated components;

fig. 3 is a schematic sectional top view of a grouting sleeve for prefabricated parts.

In the figure: 1-a base; 2-lower upright column; 3-lower bent cap; 4-left upright post; 5-right upright post; 6, upper capping beam; 11-extending embedded steel bars; 21-embedding reinforcing steel bars in the sleeve; 22-grouting sleeve; 23-a communicating chamber; 24-a pulp outlet; 25-grouting opening.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail with reference to the following embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

As shown in fig. 1, the fabricated concrete double-layer gate-type pier structure comprises a foundation 1 provided with connecting steel bars, a lower upright 2 provided with a sleeve and extending out of the upper end of the embedded steel bars at the lower end, a lower cover beam 3 provided with a sleeve and extending out of the embedded steel bars at the upper end of the left side and the upper end of the right side respectively at the lower end, a left upright 4 provided with a sleeve and extending out of the embedded steel bars at the upper end of the lower end, a right upright 5 provided with a sleeve and extending out of the embedded steel bars at the upper end of the lower end, and an upper cover beam 6 extending out of the embedded steel bars at the lower end of the left side and the lower end of the right side respectively.

The grout sleeve one end of prefabricated component embolias with this prefabricated component be used for with grout muffjoint's embedded bar, the grout sleeve other end of prefabricated component is connected with the overhanging splice bar of waiting to connect the prefabricated component, and the one end that a plurality of grout sleeves are close to the prefabricated component junction is provided with the intercommunication chamber, and the intercommunication chamber forms the grout storehouse with grout sleeve, is provided with grout mouth and the grout outlet with outside intercommunication on the grout sleeve respectively.

As shown in fig. 3, the embedded steel bars and the pre-set sleeves in the prefabricated member are arranged on four sides of the member, three pairs are arranged on one side of the member, and a communication cavity is arranged between the three pairs of embedded steel bars and the sleeves on one side of the member, so as to jointly form a communication grouting area.

In specific implementation, the connection sequence is as follows: firstly, the foundation 1 and the lower upright post 2 are connected, secondly, the lower upright post 2 and the lower bent cap 2 are connected, secondly, the left upright post 4, the right upright post 5 and the lower bent cap 3 are simultaneously connected, and finally, the left upright post 4, the right upright post 5 and the upper bent cap 6 are connected.

Take the grout sleeve connection between the foundation and the lower column as shown in fig. 2 as an example. The embedded steel bars 11 extending out of the foundation 1 are inserted into the grouting sleeves 22 of the lower upright post 2 connected with the embedded steel bars 21, grouting is started from the grouting openings 25, and grouting material flows through the three sleeves on one side through the communication cavity 23 until the grouting material flows out from the other two grouting openings 25 to be blocked. And plugging the grouting material when the grouting material flows out of the grout outlet 22, and after plugging, pulling out the grouting pipe and plugging the grouting opening 25, so as to complete connection.

It will be understood that modifications and variations can be made by persons skilled in the art in light of the above teachings and all such modifications and variations are intended to be included within the scope of the invention as defined in the appended claims.