CN201386416Y

CN201386416Y - Prestressed concrete slab applicable to civil air defense basement

Info

Publication number: CN201386416Y
Application number: CN200820231768U
Authority: CN
Inventors: 苑振芳; 刘斌; 苑磊
Original assignee: China Northeast Architectural Design and Research Institute Co Ltd
Current assignee: China Northeast Architectural Design and Research Institute Co Ltd
Priority date: 2008-12-17
Filing date: 2008-12-17
Publication date: 2010-01-20
Anticipated expiration: 2018-12-17

Abstract

A prestressed concrete double-T slab applicable to a civil air defense basement relates to a double-T slab for building. The prestressed concrete double-T slab is provided with a secondary concrete coincidence layer in which a reinforcement net piece is welded. Stirrups are thrown out of the slab ribs of the prestressed concrete double-T slab. The end of the prestressed concrete double-T slab is provided with a support embedded part. The midspan of the prestressed concrete double-T slab is provided with holes. The utility model solves the problems of the control parameter of construction member prestressing force and the design principle and the construction measurement of construction part design stage (normal use and occasional action) under high load (covering soil, fire engine or nuclear blast wave equivalent load). The utility model realizes industrial production and improves the construction efficiency greatly.

Description

A kind of prestressed concrete plate that is applicable to the air

Technical field

The utility model relates to a kind of build concrete plate, particularly relates to a kind of air's of being applicable to prestressed concrete plate.

Background technology

The people's air defence basement is for ensureing that people's air defence needs such as commands, communicates by letter, shelters, basement with predetermined safeguard function, its Class A air defense basement design must be satisfied the every requirement of shelter of its predetermined wartime to nuclear weapon, conventional weapon and chemical and biological weapons, and the design of Class B air defense basement must be satisfied the every requirement of shelter of its predetermined wartime to conventional weapon and chemical and biological weapons.Air defense basement design must be implemented the policy of " long-term preparations, focus the consruction on, manufacturing products for both peacetime and wartime us ", and should adhere to the principle that the building of people's airdefence and economic construction develop in harmony, combine with urban construction.At aspects such as layout, structure model selection, ventilation protection against the tide, water supply and drainage and powered lightings, should take corresponding measure that it is being guaranteed under the prerequisite of war readiness benefit, bring social and economic benefits into full play.In national standard " Code for design of basement for civil air defence " GB50038-2005, do not comprise prestressed concrete member, and prestressed concrete member meets the designing requirement of people's air defence basement fully at stress performance aspects such as (comprising its distortion, destruction and restorability thereof), so the inventor expands and broken through this standard range of application and design principles.

Summary of the invention

The purpose of this utility model is to provide a kind of air's of being applicable to prestressed concrete plate, to solve under the high load (the shock wave equivalent load is moved in earthing, fire fighting truck or nuclear blast) problems such as the prestressed controlling parameter of member, the design principles in member designs stage (normally using and accidental action) and construction measure.

The purpose of this utility model is achieved through the following technical solutions:

A kind of prestressed concrete plate that is applicable to the air, its prestressed concrete double T plate are provided with second coagulation soil overlapping layers, are welded with reinforced mesh in the secondary overlapping layers; The prestressed concrete double T plate rib of slab has thrown away stirrup; The prestressed concrete double T plate end is provided with the bearing embedded part; The prestressed concrete double T plate span centre is provided with hole.

Advantage of the present utility model and effect are:

1. the utility model belongs to building engineering field, adopts prestressed concrete double T plate, and double T plate face is provided with second coagulation soil overlapping layers.

2. the utility model utilizes the welded wire fabric sheet in stirrup and the secondary overlapping layers of throwing away of double T rib of slab, strengthens the globality of top board and the ability of the moving suction function of structure opposing nuclear blast;

3. the double T plate end bearing embedded part of the utility model employing has been considered the ability of the moving suction function of opposing nuclear blast;

4. the utility model can be for the hole of air's ventilating duct proper range being provided with of double T plate span centre.

5. under the effect of nuclear blast dynamic load, the utility model is after the nuclear effect, and the double T plated construction returns near normality from large deformation at once, and structural damage is reduced, and guarantees personal security.

6. the utility model has been realized batch production production, can improve efficiency of construction greatly.

Description of drawings

Fig. 1 is a prestressed concrete double T plate template schematic diagram;

Fig. 2 is the sectional view along A-A line among Fig. 1;

Fig. 3 is the sectional view along B-B line among Fig. 1;

Fig. 4 is the joint construction schematic diagram at bearing place, prestressed concrete double T plate limit;

Fig. 5 is the joint construction schematic diagram at prestressed concrete double T plate span centre bearing place.

The specific embodiment

With reference to the accompanying drawings the utility model is elaborated.

The utility model adopt prestressed concrete double T plate (hereinafter to be referred as the double T plate) be the inventor on a large amount of experimental studies basis of the stress performance (comprising its distortion, destruction and restorability thereof) of double T plate, proposition be suitable for the new structure member that 6 grades of air's top boards require.Because do not comprise prestressed concrete member in national standard " Code for design of basement for civil air defence " GB50038-2005, so the utility model is to the expansion of this standard range of application and the breakthrough of design principles aspect.

1.6 the loading condition that the level air should satisfy:

1) top board earthing;

2) fire fighting truck wheel load load;

3) under the effect of nuclear blast dynamic load, the uniform equivalent static load (70kN/m of top board ²).

2. designing and calculating principle:

1) under the effect of non-nuclear blast dynamic load, press elastic stage design, but member prestretching district allows cracking when putting the tension prestress reinforcing bar, and determine the proof stress of presstressed reinforcing steel, and make it≤0.6f according to the span situation of plate _Ptk

2) under the effect of nuclear blast dynamic load, by the elastic-plastic phase design, and the supporting capacity of utilizing double T plated construction (having considered the effect of overlapping layers) under large deformation or ultimate deformation condition, to provide.This principle is to be fit to favourable very much to the moving very of short duration effect of this time of nuclear blast.In case because after the nuclear effect, the double T plated construction returns near normality from large deformation at once, make structural damage not guarantee personal security very much.This is the unapproachable performance of general concrete structure, the core of this structure design theory just.

3. structure Design Countermeasure

1) double T plate face is provided with second coagulation soil overlapping layers, and counts the calculated height of structural element, to satisfy the requirement of standard thickness of slab;

2) utilize the welded wire fabric sheet in stirrup and the secondary overlapping layers of throwing away of double T rib of slab, strengthen the globality of top board and the ability of the moving suction function of structure opposing nuclear blast;

3) double T plate end bearing embedded part has been considered the ability of the moving suction function of opposing nuclear blast;

4) can be proper range being provided with of double T plate span centre for the hole of air's ventilating duct.

Claims

1. a prestressed concrete plate that is applicable to the air is characterized in that prestressed concrete double T plate is provided with second coagulation soil overlapping layers, is welded with reinforced mesh in the secondary overlapping layers; The prestressed concrete double T plate rib of slab has thrown away stirrup; The prestressed concrete double T plate end is provided with the bearing embedded part; The prestressed concrete double T plate span centre is provided with hole.