Steel box girder pouring method

Abstract

The invention relates to a steel box girder pouring method. The method comprises the following steps that iron ore concrete is manufactured; the steel box girder is divided into different bins according to the steel box girder webs; iron ore concrete is used for pouring each bin; and after pouring is completed, the pouring hole is closed. According to the steel box girder pouring method, on the basis that the structural design is not greatly adjusted, the iron ore concrete with the large volume weight is adopted, under the condition that the structural design is not affected, the overall balance weight of the structure is increased, and the requirements for the wind load and the stability of the steel box girder are met.

Description

Technical Field

[0001] The invention relates to the technical field of steel corridor construction, and in particular to a steel box girder casting method. Background Art

[0002] The two terminals of an airport are usually connected by a steel corridor, which is the lifeline for the normal passage of passengers and maintenance personnel. However, considering the needs of transportation supporting planning and reconstruction and connecting line construction, the existence of the steel corridor restricts the construction of the connecting line foundation pit. In order to ensure the steady progress of the renewal plan and the normal operation of the airport, the overall foundation pit of the connecting line is divided into three stages according to the location of the corridor to ensure that while one corridor is demolished, the remaining corridors can be used normally.

[0003] Airports located near the sea are not only affected by the sea breeze caused by the geographical environment all year round, but also considering that the span of the rebuilt corridor is long and the overall windward area is large, the structure itself is insufficiently heavy and cannot meet the requirements of the wind load in the coastal area for its own stability. There are major structural safety hazards, which poses a risk to the later operation of the structure. Summary of the invention

[0004] The technical solution adopted by the present invention to solve the above problems is: a method for casting a steel box beam, comprising the following steps:

[0005] Making iron ore concrete;

[0006] Divide the steel box girder into different compartments according to the steel box girder web;

[0007] Cast each chamber with iron ore concrete;

[0008] After pouring is completed, close the pouring hole.

[0009] A further improvement is that the iron ore concrete uses iron ore as a coarse aggregate and is mixed into the concrete;

[0010] Iron ore loose volume density ≥4000kg / m 3 , the iron ore particle size is 5 to 25 mm.

[0011] A further improvement is that the iron ore is crushed and transported to the construction site, where iron ore concrete is produced.

[0012] A further improvement is to use a compartment-by-compartment and layer-by-layer method to pour iron ore concrete on the steel box girder.

[0013] A further improvement is that when pouring in layers, the thickness of each layer of iron ore concrete is 500 mm.

[0014] A further improvement is that each chamber of the steel box girder is provided with 1 casting hole and 2 vibration holes.

[0015] The beneficial effects of the present invention are:

[0016] The steel box girder casting method provided by the present invention adopts iron ore concrete with a large bulk density without making major adjustments to the structural design, and increases the overall counterweight of the structure without affecting the structural design, thereby meeting the requirements of wind load and self stability. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0018] Figure 1 It is a schematic diagram of the steel box girder casting construction of the present invention. DETAILED DESCRIPTION

[0019] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, which only illustrate the basic structure of the present invention in a schematic manner, and therefore only show the components related to the present invention.

[0020] In the description of the invention, it is necessary to understand that the terms “center”, “longitudinal”, “lateral”, “length”, “width”, “thickness”, “up”, “down”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, “clockwise”, “counterclockwise”, etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the invention.

[0021] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0022] In the invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the invention can be understood according to the specific circumstances.

[0023] like Figure 1As shown, the present invention provides a method for casting a steel box beam, comprising the following steps:

[0024] Making iron ore concrete;

[0025] The steel box girder 100 is divided into different compartments 110 according to the web of the steel box girder;

[0026] Cast each chamber with iron ore concrete;

[0027] After pouring is completed, close the pouring hole.

[0028] The above-mentioned casting method is preferably applied to the casting of the support positions at both ends of the corridor.

[0029] The steel box girder casting method provided by the present invention adopts iron ore concrete with a large bulk density without making major adjustments to the structural design, and increases the overall counterweight of the structure without affecting the structural design, thereby meeting the requirements of wind load and self stability.

[0030] In order to increase the deadweight of the structure, a further improvement of the technical solution is that the iron ore concrete uses iron ore as a coarse aggregate and is mixed into the concrete;

[0031] Iron ore preferably meets the following requirements:

[0032] Iron ore loose volume density ≥4000kg / m 3 , the particle size of iron ore is 5-25mm. While increasing the concrete bulk density, it also meets the pouring fluidity requirements; according to different counterweight requirements, the mix ratio of iron ore and concrete can be adjusted accordingly.

[0033] Iron ore concrete cannot be produced by factory mixing or transported by truck due to its large bulk density. Therefore, a further improvement of this technical solution is that the iron ore is crushed at the manufacturer and then transported to the construction site, where iron ore concrete is made according to the corresponding proportions.

[0034] In order to improve the pouring quality, the technical solution is further improved to pour the iron ore concrete on the steel box girder in a compartment and layered manner.

[0035] A further improvement is that when pouring in layers, the thickness of each layer of iron ore concrete is 500 mm.

[0036] A further improvement is that each chamber of the steel box girder is provided with 1 casting hole and 2 vibration holes.

[0037] Based on the above ideal embodiments of the present invention, the relevant staff can make various changes and modifications without departing from the technical concept of the present invention through the above description. The technical scope of the present invention is not limited to the contents of the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. A method for casting a steel box girder, characterized in that: The steps include: Making iron ore concrete; Divide the steel box girder into different compartments according to the steel box girder web; Cast each chamber with iron ore concrete; After pouring is completed, close the pouring hole.

2. The method for casting a steel box beam according to claim 1, characterized in that: The iron ore concrete uses iron ore as coarse aggregate and is mixed into the concrete; Iron ore loose volume density ≥4000kg / m 3 , the iron ore particle size is 5 to 25 mm.

3. The method for casting a steel box beam according to claim 2, characterized in that: After the iron ore is crushed, it is transported to the construction site, where iron ore concrete is made.

4. The method for casting a steel box beam according to claim 1, characterized in that: The iron ore concrete is poured in the steel box girder in compartments and layers.

5. The method for casting a steel box beam according to claim 4, characterized in that: When pouring in layers, the thickness of each layer of iron ore concrete is 500mm.

6. The method for casting a steel box beam according to claim 1, characterized in that: Each chamber of the steel box girder is equipped with 1 casting hole and 2 vibration holes.

Images