阅读说明：本技术 一种超高性能混凝土桁架梁及其施工方法 (Ultra-high performance concrete truss girder and construction method thereof ) 是由 周志敏 肖礼经 于 2019-12-03 设计创作，主要内容包括：本发明涉及一种超高性能混凝土桁架梁。所述超高性能混凝土桁架包括由多个预制超高性能混凝土杆件拼接而成的空间桁架；所述预制超高性能混凝土杆件包含预制超高性能混凝土杆主体,以及预埋于预制超高性能混凝土杆主体两端的预埋件；各预制超高性能混凝土杆件于节点处由连接相应预埋件的节点连接件固定。所述预制超高性能混凝土杆件于工厂预制,其精度高,可实现标准化生产；所述预制超高性能混凝土杆主体采用的基材为超高性能混凝土,其强度高、截面尺寸小,材料用量少,吊装重量轻；现场施工时,各组件直接装配,无需现场浇筑,施工速度快。(The invention relates to an ultra-high performance concrete truss girder. The ultra-high performance concrete truss comprises a space truss formed by splicing a plurality of prefabricated ultra-high performance concrete rods; the prefabricated ultrahigh-performance concrete pole piece comprises a prefabricated ultrahigh-performance concrete pole main body and embedded pieces embedded at two ends of the prefabricated ultrahigh-performance concrete pole main body; and each prefabricated ultrahigh-performance concrete rod piece is fixed at the node by a node connecting piece connected with the corresponding embedded piece. The prefabricated ultrahigh-performance concrete rod piece is prefabricated in a factory, the precision is high, and standardized production can be realized; the base material adopted by the prefabricated ultrahigh-performance concrete pole main body is ultrahigh-performance concrete, and the prefabricated ultrahigh-performance concrete pole main body is high in strength, small in section size, small in material consumption and light in hoisting weight; during site operation, all components are directly assembled without site pouring, and the construction speed is high.)

1. An ultra-high performance concrete truss girder which is characterized in that: the space truss is formed by splicing a plurality of prefabricated ultrahigh-performance concrete rods; the prefabricated ultrahigh-performance concrete pole piece comprises a prefabricated ultrahigh-performance concrete pole main body and embedded pieces embedded at two ends of the prefabricated ultrahigh-performance concrete pole main body; and each prefabricated ultrahigh-performance concrete rod piece is fixed at the node by a node connecting piece connected with the corresponding embedded piece.

2. The ultra high performance concrete truss girder according to claim 1, wherein: the embedded parts and the node connecting pieces are respectively provided with a connecting through hole, and the embedded parts and the node connecting pieces are fixedly bolted through bolts.

3. The ultra high performance concrete truss girder according to claim 2, wherein: and the number of the connecting through holes of each embedded part is two.

4. The ultra high performance concrete truss girder according to claim 1, wherein: the cross section of the prefabricated ultrahigh-performance concrete pole main body is rectangular, the length of the cross section is 10-50 cm, and the width of the cross section is 10-50 cm.

5. The ultra high performance concrete truss girder according to any one of claims 1 to 4, wherein: and the embedded part is welded and fixed with the steel bar of the prefabricated ultrahigh-performance concrete pole main body.

6. A construction method of the ultra high performance concrete truss girder as recited in claim 5, comprising the steps of:

binding steel bars, and welding and fixing the embedded parts and the steel bars;

placing the steel bars in the template, and then pouring the ultra-high performance concrete into the template;

after the prefabricated ultrahigh-performance concrete rod reaches a certain strength, removing the template, and maintaining;

and splicing the maintained prefabricated ultrahigh-performance concrete rods to obtain the ultrahigh-performance concrete truss girder.

Technical Field

The invention relates to a bridge member and the technical field of construction thereof, in particular to an ultra-high performance concrete truss girder and a construction method thereof.

Background

The Ultra-High Performance Concrete (UHPC) is a cement-based material, has excellent mechanical properties, High tensile and compressive strength, good toughness and durability, and small creep under the action of long-term load, is not only beneficial to the development of bridges towards light and large span directions, but also can avoid structural cracking, enhance the durability of bridges under severe environments, reduce the later maintenance cost, and is a novel cement-based material with wide application prospect in the field of civil engineering bridges.

At present, the truss girder applied to the bridge is mainly a steel structure type truss girder. However, steel is susceptible to corrosion in wet environments, particularly in environments where corrosive media are present, must be painted or galvanized, and must be periodically maintained during use.

Disclosure of Invention

In view of the above problems, the present invention has been made to provide an ultra high performance concrete truss girder and a construction method thereof which overcome or at least partially solve the above problems.

In a first aspect, the present application provides an ultra-high performance concrete truss beam.

The ultra-high performance concrete truss girder comprises a space truss formed by splicing a plurality of prefabricated ultra-high performance concrete rods; the prefabricated ultrahigh-performance concrete pole piece comprises a prefabricated ultrahigh-performance concrete pole main body and embedded pieces embedded at two ends of the prefabricated ultrahigh-performance concrete pole main body; and each prefabricated ultrahigh-performance concrete rod piece is fixed at the node by a node connecting piece connected with the corresponding embedded piece.

Optionally, the embedded part and the node connecting piece are both provided with connecting through holes, and the embedded part and the node connecting piece are bolted and fixed through bolts.

Optionally, the number of the connecting through holes of each embedded part is two.

Optionally, the cross section of the prefabricated ultrahigh-performance concrete pole main body is rectangular, the length of the cross section is 10-50 cm, and the width of the cross section is 10-50 cm.

Optionally, the embedded part is welded and fixed with the steel bars of the prefabricated ultrahigh-performance concrete pole main body.

In a second aspect, the present application provides a method of constructing the ultra-high performance concrete truss girder of the first aspect.

The construction method comprises the following steps:

binding steel bars, and welding and fixing the embedded parts and the steel bars;

placing the steel bars in the template, and then pouring the ultra-high performance concrete into the template;

after the prefabricated ultrahigh-performance concrete rod reaches a certain strength, removing the template, and maintaining;

and splicing the maintained prefabricated ultrahigh-performance concrete rods to obtain the ultrahigh-performance concrete truss girder.

The invention has the following beneficial effects:

in the embodiment, the prefabricated ultrahigh-performance concrete rod piece can be prefabricated in a factory, the precision is high, and standardized production can be realized; the base material adopted by the prefabricated ultrahigh-performance concrete pole main body is ultrahigh-performance concrete, and the prefabricated ultrahigh-performance concrete pole main body is high in strength, small in section size, small in material consumption and light in hoisting weight; during site operation, all components are directly assembled without site pouring, and the construction speed is high.

Drawings

The accompanying drawings, which are included to provide a further understanding of the embodiments of the application, are incorporated in and constitute a part of this specification, illustrate embodiments of the application and together with the description serve to explain the principles of the application. It is obvious that the drawings in the following description are only some embodiments of the application, and that for a person skilled in the art, other drawings can be derived from them without inventive effort. In the drawings:

FIG. 1 is a schematic structural view of an exemplary embodiment of an ultra high performance concrete truss girder of the present application;

FIG. 2 is a schematic view illustrating connection of prefabricated ultra-high performance concrete poles of FIG. 1 at nodes

Description of reference numerals: 1. prefabricating an ultrahigh-performance concrete rod; 2. prefabricating an ultrahigh-performance concrete pole main body; 3. embedding parts; 4. a node connecting piece.

Detailed Description

The terms of orientation of upper, lower, left, right, front, rear, inner, outer, top, bottom, and the like, which are or may be referred to in this specification, are defined relative to the configuration shown in the drawings, and are relative terms, and thus may be changed correspondingly according to the position and the use state thereof. Therefore, these and other directional terms should not be construed as limiting terms. Furthermore, the terms "comprises," "comprising," and any variations thereof, are intended to cover non-exclusive inclusions.

Referring initially to fig. 1, an exemplary embodiment of an ultra high performance concrete truss girder in accordance with the present invention is shown. As shown in fig. 1, the ultra high performance concrete truss girder includes a space truss formed by splicing a plurality of prefabricated ultra high performance concrete poles 1. Specifically, the prefabricated ultrahigh-performance concrete pole piece 1 can be divided into a vertical pole, a horizontal pole and an inclined web member according to the position of the prefabricated ultrahigh-performance concrete pole piece.

The prefabricated ultrahigh-performance concrete pole piece 1 comprises a prefabricated ultrahigh-performance concrete pole main body 2 and embedded pieces 3 embedded at two ends of the prefabricated ultrahigh-performance concrete pole main body 2; each prefabricated ultrahigh-performance concrete rod part 1 is fixed at a node by a node connecting part 4 connected with a corresponding embedded part 3.

Specifically, the embedded part 3 is an embedded steel plate, and two connecting through holes are formed in the part of the embedded part 3 extending out of the prefabricated ultrahigh-performance concrete pole main body 2; the node connecting pieces 4 are connecting steel plates, the number of the connecting through holes corresponding to the number of the embedded parts 3 connected with the node connecting pieces 4 is set in the node connecting pieces 4, and if the number of the prefabricated ultrahigh-performance concrete rods 1 spliced at a certain node is three, the number of the connecting through holes of the corresponding node connecting pieces 4 at the node is six; if the number of the prefabricated ultrahigh-performance concrete rods 1 spliced at a certain node is four, the number of the connecting through holes of the corresponding node connecting piece 4 at the node is eight; if the number of the prefabricated ultrahigh-performance concrete rods 1 spliced at a certain node is five, the number of the connecting through holes of the corresponding node connecting piece 4 at the node is ten; and so on. And the embedded parts 3 and the node connecting parts 4 are bolted and fixed through high-strength bolts. It should be understood that the number of the connecting through holes formed in the portion of each embedded part 3 extending out of the main body 2 of the prefabricated ultra-high performance concrete pole may be one, three, four, etc. In an alternative embodiment, the embedded parts 3 and the node connecting parts 4 are fixed by welding.

In the embodiment, the cross section of the prefabricated ultrahigh-performance concrete pole main body 2 is rectangular, the length of the cross section is 10-50 cm, and the width of the cross section is 10-50 cm.

The construction method of the ultra-high performance concrete truss girder comprises the following steps:

binding steel bars, and welding and fixing the embedded parts and the steel bars;

placing the steel bars in the template, and then pouring the ultra-high performance concrete into the template;

after the prefabricated ultrahigh-performance concrete rod reaches a certain strength, removing the template, and maintaining;

and splicing the maintained prefabricated ultrahigh-performance concrete rods to obtain the ultrahigh-performance concrete truss girder.

The prefabricated ultrahigh-performance concrete rod piece can be prefabricated in a factory, has high precision and can realize standardized production; the base material adopted by the prefabricated ultrahigh-performance concrete pole main body is ultrahigh-performance concrete, and the prefabricated ultrahigh-performance concrete pole main body is high in strength, small in section size, small in material consumption and light in hoisting weight; during on-site construction, all components are directly assembled without on-site pouring, the construction speed is high, truss girders within 40m span can be assembled, and truss arch bridges about 60m span can be assembled.

The above examples only represent some embodiments of the present invention, and the description thereof is more specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.