Sea sand combined concrete column applied to ocean engineering

Abstract

The utility model provides a sea sand combined type concrete column applied to ocean engineering, which comprises a prefabricated pipe and a sea sand concrete column, and the sea sand concrete column is positioned in the prefabricated pipe; the prefabricated pipe comprises high-performance concrete, vertical steel bars and transverse stirrups, and the vertical steel bars and the transverse stirrups are combined to form a stirrup cage; the vertical steel bars are located at the 1 / 2 position of the wall thickness of the prefabricated pipe. Joint holes are formed in the inner wall of the prefabricated pipe. The sea sand and the high-performance concrete are combined to form the concrete column, the concrete column has high bearing capacity and high strength, meanwhile, the sea sand is fully utilized, the concrete column is suitable for ocean engineering, and the problems of river sand resource shortage and long-distance transportation cost are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of construction, in particular to a sea-sand combined concrete column used in marine engineering. Background Art

[0002] As the most basic load-bearing material for infrastructure projects such as houses and bridges, the research and design of reinforced concrete structures have undergone a long period of development. With the development of the economy and my country's increased construction of marine projects, the demand for concrete in infrastructure construction has increased year by year. For a long time, the main raw material for concrete production has been river sand. Due to the limited river sand resources and the long-term exploitation of river sand, it has caused serious impacts on the ecological environment. However, seawater sand concrete has similar mechanical properties to ordinary concrete, and sea sand resources are abundant. Therefore, how to use seawater sand concrete has become the focus of people's attention.

[0003] In terms of the application of seawater and sea sand concrete, there are some public technical documents, such as: Utility model patent CN220150688U discloses a fiber-reinforced composite steel bar and sea sand reinforced concrete components. This patent technology fully utilizes sea sand as a load-bearing material. Utility model patent CN202370171U discloses a steel tube concrete column filled with sea sand concrete, which directly pours sea sand concrete into the steel tube to form a steel tube concrete column. Since seawater and sea sand contain chloride ions, they will corrode the steel bars and affect the mechanical properties of the concrete structure. Therefore, the above patent technology also needs to dechlorinate the sea sand, which increases the manufacturing cost. Summary of the invention

[0004] The utility model provides a sea sand combined concrete column applied to marine engineering based on the problems that the current concrete prepared from sea sand has high cost and steel bars are corroded by sea water and sea sand.

[0005] The implementation method of the utility model is as follows: a sea sand combined concrete column applied to marine engineering, comprising a prefabricated pipe and a sea sand concrete column, wherein the sea sand concrete column is located inside the prefabricated pipe; the prefabricated pipe comprises high-performance concrete, vertical steel bars, and transverse stirrups, wherein the vertical steel bars and the transverse stirrups are combined into a stirrup cage; the vertical steel bars are located at 1 / 2 of the wall thickness of the prefabricated pipe; and the inner wall of the prefabricated pipe is provided with a joint hole. In the utility model, the prefabricated pipe adopts high-performance concrete, and the vertical steel bars and the transverse stirrups are wrapped in the high-performance concrete, while the sea sand is located in the prefabricated pipe and does not contact the steel bars, thereby avoiding corrosion of the steel bars. A joint hole is provided in the prefabricated pipe, and when the sea sand concrete is poured into the prefabricated pipe, it is fully filled into the joint hole, thereby playing a reinforcing role of the sea sand concrete and the prefabricated pipe. Through the combination of the high-performance concrete prefabricated pipe and the sea sand concrete, the bearing capacity of the combined concrete column is improved while making full use of the sea sand.

[0006] Preferably, the high performance concrete is reactive powder concrete.

[0007] Preferably, in order to further prevent the steel bars from being corroded by seawater and sea sand, the exterior of the vertical steel bars is coated with a rust inhibitor.

[0008] Preferably, the depth of the joint hole is 1 / 4 of the wall thickness of the prefabricated pipe.

[0009] Preferably, the transverse stirrups are made of fiber reinforced plastic, which has a high strength-to-weight ratio and outstanding corrosion resistance.

[0010] Preferably, in order to further improve the contact strength between the sea sand concrete and the prefabricated pipe, the joint holes are arranged obliquely downward.

[0011] The utility model combines high-performance concrete with sea sand concrete to form a sea sand composite concrete column, which has the following beneficial effects: (1) It makes full use of sea sand resources and applies them to marine engineering construction, which can effectively solve the problem of high construction costs caused by long-distance transportation of bulk raw materials. (2) Since the vertical steel bars are located in the prefabricated pipe and do not contact the sea sand, the corrosion of the steel bars by the sea sand can be prevented or reduced. (3) The prefabricated pipe is made of high-performance concrete, which improves the bearing capacity. (4) The prefabricated pipe is provided with joint holes to increase the contact area with the sea sand concrete and enhance the integrity of the two. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 This is a vertical section diagram of a sea-sand composite concrete column used in marine engineering.

[0013] Figure 2 This is a transverse cross-sectional view of the top of a sea-sand composite concrete column used in marine engineering.

[0014] Figure 3 It is a vertical cross-sectional view of the utility model when the joint holes in the sea-sand combined concrete column applied to marine engineering are arranged obliquely downward.

[0015] Among them, 1. prefabricated pipe; 101. high-performance concrete; 102. vertical steel bars; 103. transverse stirrups; 104. joint holes; 2. sea sand concrete columns. DETAILED DESCRIPTION

[0016] The following is combined with Figure 1-3 , the specific implementation methods of the utility model are described in detail, but it should be understood that the protection scope of the utility model is not limited by the specific implementation methods.

[0017] like Figure 1-2As shown, a sea sand combined concrete column used in marine engineering includes a prefabricated pipe 1 and a sea sand concrete column 2, wherein the sea sand concrete column 2 is located inside the prefabricated pipe 1; the prefabricated pipe 1 includes high performance concrete 101, vertical steel bars 102, and transverse stirrups 103, wherein the vertical steel bars 102 and the transverse stirrups 103 are combined into a stirrup cage; the vertical steel bars 102 are located at 1 / 2 of the wall thickness of the prefabricated pipe 1; and the inner wall of the prefabricated pipe 1 is provided with joint holes 104. In this embodiment, the vertical steel bars 102 and the transverse reinforcements 103 are first combined into a stirrup cage, and the stirrup cage is placed in a casting mold to prepare a prefabricated pipe 1. After curing, the prefabricated pipe 1 is used as a template for casting the sea sand concrete column 2. Since the joint holes 104 are provided inside the prefabricated pipe 1, the sea sand concrete will fully fill the joint holes 104 during casting, thereby being combined with the prefabricated pipe 1 into one body.

[0018] On the basis of the above implementation, further, the high performance concrete 101 is made of active powder concrete; the vertical steel bars 102 are coated with rust inhibitor on the outside; and the transverse stirrups 103 are made of fiber reinforced plastic.

[0019] On the basis of the above implementation, further, the depth of the joint hole 104 is 1 / 4 of the wall thickness of the prefabricated pipe 1 .

[0020] Based on the above implementation, Figure 3 As shown, the joint hole 104 is arranged obliquely downward, which can further improve the bonding strength between the prefabricated pipe 1 and the sea sand concrete column.

Claims

1. A sea sand composite concrete column used in marine engineering, characterized in that: It includes a prefabricated pipe and a sea sand concrete column, wherein the sea sand concrete column is located inside the prefabricated pipe; the prefabricated pipe includes high-performance concrete, vertical steel bars, and transverse stirrups, wherein the vertical steel bars and the transverse stirrups are combined into a stirrup cage; the vertical steel bars are located at 1 / 2 of the wall thickness of the prefabricated pipe; and the inner wall of the prefabricated pipe is provided with a joint hole.

2. The sea sand combined concrete column used in marine engineering according to claim 1, characterized in that: The high performance concrete is active powder concrete.

3. The sea sand combined concrete column used in marine engineering according to claim 1, characterized in that: The exterior of the vertical steel bars is coated with a rust inhibitor.

4. The sea sand combined concrete column used in marine engineering according to claim 1, characterized in that: The depth of the joint hole is 1 / 4 of the wall thickness of the prefabricated pipe.

5. The sea sand combined concrete column used in marine engineering according to claim 1, characterized in that: The transverse stirrups are made of fiber reinforced plastic.

6. The sea sand combined concrete column used in marine engineering according to claim 1, characterized in that: The seam holes are arranged obliquely downward.

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