CN218437692U - Island reef engineering assembled and modularized floor system - Google Patents

Abstract

The utility model discloses an island and reef engineering assembled and modularized floor system, which comprises a sectional type prestressed ultrahigh-performance concrete beam (1), a fabric reinforced ultrahigh-performance concrete precast slab (2) and a cast-in-situ seawater sea sand coral aggregate concrete layer (3); the method is characterized in that: the sectional prestressed ultrahigh-performance concrete beam (1) is formed by butt-jointing one or more prefabricated ultrahigh-performance concrete pipe sections (5) with longitudinal pore passages (4) and length moduli along the span direction, and the length of the beam is adjusted by changing the length moduli, the number and the combination of different moduli of the prefabricated ultrahigh-performance concrete pipe sections (5). The utility model has the advantages of high bearing capacity, excellent marine environment corrosion resistance, capability of adopting prefabrication construction, capability of utilizing island resources such as seawater, sea sand coral reefs and the like; meanwhile, the large-span beam is assembled based on the small-size prefabricated member, and span adjustment, manufacturing and transportation are facilitated.

Description

Island reef engineering assembled and modularized floor system

Technical Field

The utility model discloses mainly relate to the ocean engineering and the building structure field among the civil engineering, refer in particular to an assembled floor system suitable for island reef building.

Background

Ocean island reef engineering is the most challenging field in civil engineering, and the structure is in the marine environment of high temperature, high humidity, high salt fog, high radiation, and the corruption is very serious, and the main characteristics include: (1) the content of NaCl in seawater is about 3 percent, which is the concentration with the fastest corrosion rate to the structure; (2) the most severe corrosion of components in the splash zone; (3) the salt content in the marine atmospheric environment is high, and the salt content is one of the most serious areas in corrosion of various atmospheric environments; (4) the corrosion of concrete and metals by organisms in the sea water is also severe. In ocean engineering construction, the most prominent structural form is a reinforced concrete structure. The existing data show that under the comprehensive action of factors such as sunlight irradiation, temperature difference, seawater erosion, salt spray and biological erosion, a concrete member cracks and peels off and a steel bar is corroded and exposed about 3 years, while a metal member is seriously corroded only about 1 year. Therefore, in marine environments, the corrosion resistance of a structure is particularly important, and necessary corrosion prevention measures are generally required. Whether concrete structures or metal structures, anticorrosive coatings are generally used for surface spraying. For concrete structures, the corrosion problem caused by the corrosion of the steel bars is particularly prominent, and the method for improving the compactness and impermeability of the concrete and coating the steel bars by means of selecting raw materials, doping additives and the like is also a common technical means. However, existing marine structure corrosion protection measures have significant drawbacks:

firstly, the service life of the surface anti-corrosive paint is limited, the paint needs to be repaired periodically, the maintenance cost is high in the later period, and the maintenance cost is multiplied by considering the special geographical position of the ocean island reef. In addition, for the cast-in-place concrete structure, because chloride ions in seawater and sea sand severely corrode reinforcing steel bars, river sand and fresh water must be used for mixing the concrete, and the transportation of a large amount of raw materials is very inconvenient and expensive for ocean island engineering.

In ocean island engineering construction, island resources such as seawater, sea sand, coral reefs and the like are fully utilized to mix concrete, the requirement of long-distance transportation of bulk raw materials can be greatly reduced, and the ocean island engineering construction method has important significance for reducing construction cost.

Based on the characteristics, the prefabricated fiber fabric reinforced UHPC (ultra high performance concrete) member and cast-in-place seawater sea sand coral aggregate concrete assembled integral structure meets the technical requirements of ocean island reef engineering and has a good application scenario. The floor system is a basic component of a building structure and has decisive influence on the safety, the economy, the construction convenience, the construction period and the like of a building. Therefore, an assembled and modularized floor system is provided, which becomes a key for solving the bottleneck problem of island engineering construction and developing a novel island structure system.

Disclosure of Invention

The invention aims to provide an assembled and modularized floor slab system which has the advantages of excellent marine environment corrosion resistance, high bearing capacity, capability of utilizing island resources such as seawater, sea sand coral reefs and the like. Meanwhile, the floor system adopts modular design and assembly type construction, the large-span beam is assembled based on the small-size prefabricated member, the span adjustment is convenient, the manufacture and the transportation are convenient, the integrity and the comfort are good, the economy is outstanding, and the method is particularly suitable for ocean island reef engineering construction.

The utility model discloses a solution is an island reef engineering assembled, modularization floor system, including festival segmentation prestressing force ultra high performance concrete roof beam (1), fabric reinforcing ultra high performance concrete precast slab (2) and cast-in-place sea water sea sand coral aggregate concrete layer (3); the method is characterized in that: the segmental prestressed ultrahigh-performance concrete beam (1) is formed by butting one or more prefabricated ultrahigh-performance concrete pipe sections (5) with longitudinal ducts (4) and length moduli in the span direction, the length of the segmental prestressed ultrahigh-performance concrete beam is adjusted by changing the length moduli, the number and the combination of different moduli of the prefabricated ultrahigh-performance concrete pipe sections (5), axial pretightening force is applied by tensioning prestressed tendons (6) penetrating through the longitudinal ducts (4), and the prestressed tendons (6) are anchored by locally pouring grouting materials (7) into the longitudinal ducts (4) at the end part of the beam; the prefabricated ultrahigh-performance concrete pipe joint (5) is a modular rectangular thin-wall pipe with a male connector (8) and a female connector (9) at two ends respectively; the width modulus of the fabric reinforced ultra-high performance concrete precast slab (2) is matched with the length modulus of the precast ultra-high performance concrete pipe joint (5).

Compared with the prior art, the utility model has the advantages of just lie in:

(1) the floor system has excellent corrosion resistance. Both UHPC and the fiber fabric have excellent durability in the marine environment, and particularly, the problem of steel bar corrosion in a common reinforced concrete structure does not exist. Therefore, seawater and sea sand can be used as they are as a raw material for UHPC.

(2) Based on modular design and assembled construction, be convenient for construction and span adjustment. The main stressed member of the floor system is a sectional prestressed UHPC beam, the structural unit of the floor system is a prefabricated UHPC pipe section manufactured based on modulus design and a centrifugal method, one or more length moduli of the prefabricated UHPC pipe sections with longitudinal ducts are butted along the span direction, and axial pretightening force is applied by tensioning prestressed tendons penetrating through the longitudinal ducts to form a whole, so that the large-span beam is assembled based on a small-size prefabricated member. The length of the beam is adjusted by changing the length modulus and the number of the pipe joints and the combination of the pipe joints with different specifications. The width modulus of the fabric reinforced UHPC precast slab is matched with the width modulus of the precast UHPC pipe joint, so that the precast UHPC precast slab is very favorable for prefabrication, transportation and assembly of components, has low requirement on site construction equipment and has high construction efficiency.

(3) The cast-in-place layer of the floor system can be directly made of concrete mixed with island materials such as seawater, sea sand, coral aggregates and the like, so that long-distance transportation of a large amount of raw materials is greatly reduced, and the transportation cost is greatly reduced. In addition, the cast-in-place layer and the prefabricated slab are combined to form the laminated slab, so that the integrity, the sound and shock insulation performance and the heat preservation and heat insulation performance of a floor slab system are remarkable, and the comfort of a building is improved.

Drawings

FIG. 1 is a schematic cross-sectional view of an assembled, modular floor system;

FIG. 2 is a schematic longitudinal section of an assembled, modular floor system;

fig. 3 is a schematic view of a prefabricated ultra-high performance concrete pipe section.

Description of the figures

1 is a sectional prestressed ultrahigh-performance concrete beam; 2, a fabric reinforced ultra-high performance concrete precast slab;

3, a cast-in-situ seawater sea sand coral aggregate concrete layer; 4 is a longitudinal pore channel;

5, prefabricating an ultrahigh-performance concrete pipe joint; 6 is a prestressed tendon;

7 is grouting material; 8 is a male interface;

9 is a female interface; and 10 is a reinforcing fabric.

Detailed Description

The utility model discloses as shown in the attached drawing, an island reef engineering assembled and modularized floor system comprises a sectional prestressed ultra-high performance concrete beam (1), a fabric reinforced ultra-high performance concrete precast slab (2) and a cast-in-place seawater sea sand coral aggregate concrete layer (3); the method is characterized in that: the segmental prestressed ultrahigh-performance concrete beam (1) is formed by butting one or more prefabricated ultrahigh-performance concrete pipe sections (5) with longitudinal ducts (4) and length moduli in the span direction, the length of the segmental prestressed ultrahigh-performance concrete beam is adjusted by changing the length moduli, the number and the combination of different moduli of the prefabricated ultrahigh-performance concrete pipe sections (5), axial pretightening force is applied by tensioning prestressed tendons (6) penetrating through the longitudinal ducts (4), and the prestressed tendons (6) are anchored by locally pouring grouting materials (7) into the longitudinal ducts (4) at the end part of the beam; the prefabricated ultrahigh-performance concrete pipe joint (5) is a modular rectangular thin-walled pipe with a male connector (8) and a female connector (9) at two ends respectively; the width modulus of the fabric reinforced ultra-high performance concrete precast slab (2) is matched with the length modulus of the precast ultra-high performance concrete pipe joint (5).

When in implementation, firstly, according to design requirements, a centrifugal method is adopted to manufacture a prefabricated ultra-high performance concrete pipe section (5) with a longitudinal hole (4), and a fabric reinforced ultra-high performance concrete prefabricated plate (2) is manufactured; after the prefabricated member is transported to an island construction site, one or more prefabricated ultrahigh-performance concrete pipe sections (5) with length modules and provided with longitudinal ducts (4) are butted together along the span direction in a mode that a male connector (8) is inserted into a female connector (9), then prestressed tendons (6) penetrate into the longitudinal ducts (4), and the prestressed tendons (6) are tensioned to apply axial pre-tightening force; then, locally pouring grouting materials (7) into the longitudinal hole (4) at the end part of the beam to anchor the prestressed tendons (6); after the grouting material (7) reaches the strength required by the design, hoisting the sectional prestressed ultrahigh-performance concrete beam (1), hoisting the fabric reinforced ultrahigh-performance concrete precast slab (2) in place, and placing the precast slab on the top of the sectional prestressed ultrahigh-performance concrete beam (1); and finally, mixing the seawater, the sea sand and the coral aggregate to prepare concrete, pouring the concrete on the upper part of the fabric reinforced ultra-high performance concrete precast slab (2) to form a seawater-sea-sand-coral-aggregate concrete layer (3), and finishing the site construction of the floor slab.

Claims (2)

1. An island engineering fabricated and modularized floor system comprises a sectional type prestressed ultrahigh-performance concrete beam (1), a fabric reinforced ultrahigh-performance concrete precast slab (2) and a cast-in-place seawater sea sand coral aggregate concrete layer (3); the method is characterized in that: the segmental prestressed ultrahigh-performance concrete beam (1) is formed by butting one or more prefabricated ultrahigh-performance concrete pipe sections (5) with longitudinal ducts (4) and length moduli along the span direction, the length of the segmental prestressed ultrahigh-performance concrete beam is adjusted by changing the length moduli, the number and the combination of different moduli of the prefabricated ultrahigh-performance concrete pipe sections (5), axial pretightening force is applied by tensioning prestressed tendons (6) penetrating through the longitudinal ducts (4), and grouting materials (7) are locally poured into the longitudinal ducts (4) at the end parts of the beam to anchor the prestressed tendons (6); the prefabricated ultrahigh-performance concrete pipe joint (5) is a modular rectangular thin-walled pipe with a male connector (8) and a female connector (9) at two ends respectively; the width modulus of the fabric reinforced ultra-high performance concrete precast slab (2) is matched with the length modulus of the precast ultra-high performance concrete pipe joint (5).

2. The island engineering fabricated, modular floor system of claim 1, wherein: the prefabricated ultrahigh-performance concrete pipe joint (5) is produced by a centrifugal method.

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