CN202610694U

CN202610694U - Steel fiber light concrete and high-strength concrete overlaid pouring composite beam

Info

Publication number: CN202610694U
Application number: CN 201220274599
Authority: CN
Inventors: 赵顺波; 李长永; 李晓克
Original assignee: North China University of Water Resources and Electric Power
Current assignee: North China University of Water Resources and Electric Power
Priority date: 2012-06-12
Filing date: 2012-06-12
Publication date: 2012-12-19
Anticipated expiration: 2022-06-12

Abstract

The utility model discloses a steel fiber light concrete and high-strength concrete overlaid pouring composite beam which comprises steel fiber light concrete and high-strength concrete which are poured into one whole body in an overlaid mode. The steel fiber light concrete is arranged at the bottom and the high-strength concrete is poured on the steel fiber light concrete. In the manufacturing process, firstly, the steel fiber light concrete at the bottom is poured; then, the high-strength concrete is continuously poured on the basis of vibrating the steel fiber light concrete compact; and after the maintenance formation is carried out and a die is removed, the overlaid pouring composite beam can be formed. The steel fiber light concrete and high-strength concrete overlaid pouring composite beam has simple structure; a tensile region of the beam is formed by pouring the steel fiber light concrete with high tensile strength at the bottom, so that not only can the crack resistance and the thermal insulation property of the beam be improved and ensured, but also the dead weight of the beam can be reduced; and the high-strength concrete with high tensile strength is adopted at the upper part of the beam, so that the tensile strength of the tensile region can be improved.

Description

The folded compound beam that waters of a kind of steel fibre light concrete and high-strength concrete

Technical field

The utility model belongs to technical field of civil engineering, the folded compound beam that waters of particularly a kind of steel fibre light concrete and high-strength concrete.

Background technology

At present, light concrete (comprising sand light concrete and full lightweight concrete) has from advantages such as heavy and light, good heat insulating, adopts steel fibre to strengthen the back and forms the steel fibre light concrete.The steel fibre light concrete is compared with light concrete and has been increased the advantage that cracking resistance is good and tensile strength is high, uses it for concrete structure and can play and significantly improve the structure anti-crack ability, reduce thermal stresses, alleviate effects such as earthquake effect.But owing to receive the restriction of aggregate self intensity, the compressive strength of steel fibre light concrete is difficult to bring up to the level of high-strength concrete.Therefore, the Structural Engineering of steel fibre light concrete is used and has been received great restriction, is difficult to have breakthrough.

The utility model content

The purpose of the utility model provide a kind of simple in structure, from the folded compound beam that waters of heavy and light, anti-crack ability is strong and compressive strength is high steel fibre light concrete and high-strength concrete.

For realizing above-mentioned purpose; The technical scheme of the utility model is: the folded compound beam that waters of a kind of steel fibre light concrete and high-strength concrete; Comprise folding and water all-in-one-piece steel fibre light concrete and high-strength concrete, the bottom is the steel fibre light concrete, and high-strength concrete is cast on the steel fibre light concrete.

Said folded cross section of watering compound beam is a rectangle, and the height of steel fibre light concrete is no more than 70% of deck-molding.

Said folded cross section of watering compound beam is a T shape, and the height of steel fibre light concrete is no more than 90% of web height.

Said folded cross section of watering compound beam is a box-shaped, and the steel fibre light concrete is 100 millimeters apart from the top board bottom level.

The job practices of the utility model comprises the steps: 1) make template according to folded physical dimension of watering compound beam, the reinforcing bar of colligation beam, the reinforcing bar form confirms that according to the stress performance of beam the distance of reinforcing bar and template is a protective layer thickness; 2) at the folded bottom pouring steel fibre light concrete that waters compound beam, and vibration compacting; 3) in step 2) the basis on continue the cast high-strength concrete, and vibration compacting; 4) after maintenance reaches requirement of strength, stripping, folded the watering of steel fibre light concrete and high-strength concrete is integral, and promptly forms the folded compound beam that waters of steel fibre light concrete and high-strength concrete.

Compared with prior art, the utility model has the advantages that:

1, the utility model comprises and folded waters all-in-one-piece steel fibre light concrete and high-strength concrete, and the bottom is the steel fibre light concrete, and high-strength concrete is cast on the steel fibre light concrete; During making, the steel fibre light concrete of cast bottom continues the cast high-strength concrete then on the basis of steel fibre light concrete vibration compacting earlier; Treat the maintenance moulding; Can form after the form removal to fold and water compound beam, simple in structure, the tensile region of beam is formed by the high steel fibre light concrete cast of bottom tensile strength; The anti-crack ability and the heat-insulating property of beam both can have been improved and ensure, the deadweight that can alleviate beam again; The high high-strength concrete of compressive strength is adopted on the top of beam, can improve the compressive strength of pressure zone.

2, the utility model is specially adapted to the construction of large span house and bridge construction, can significantly alleviate dead load, effectively reduces earthquake to effect on structure.

Description of drawings

Fig. 1 is steel fibre light concrete and the folded sketch map that waters compound beam embodiment 1 of high-strength concrete;

Fig. 2 is steel fibre light concrete and the folded sketch map that waters compound beam embodiment 2 of high-strength concrete;

Fig. 3 is steel fibre light concrete and the folded sketch map that waters compound beam embodiment 3 of high-strength concrete.

The specific embodiment

Embodiment 1; Steel fibre light concrete as shown in Figure 1 and high-strength concrete are folded to water compound beam, and its cross section is a rectangle, and the bottom is that steel fibre light concrete 1, top are high-strength concrete 2; The height h of steel fibre light concrete 1 is no more than folded water 70% of compound beam height H, i.e. h≤0.7H.

Steel fibre light concrete 1 comprises steel fibre light weight aggregate concrete and steel fibre full lightweight concrete.

Embodiment 2; Steel fibre light concrete as shown in Figure 2 and high-strength concrete are folded to water compound beam, and its cross section is a T shape, and the bottom is that steel fibre light concrete 1, top are high-strength concrete 2; The height hw of steel fibre light concrete 1 is no more than 90% of web height Hw, i.e. hw≤0.9Hw.

Embodiment 3; Steel fibre light concrete as shown in Figure 3 and high-strength concrete are folded to water compound beam, and its cross section is a box-shaped, and the bottom is that steel fibre light concrete 1, top are high-strength concrete 2; Steel fibre light concrete 1 is 100 millimeters apart from the height h of top board bottom, i.e. h=100mm.

Claims

1. steel fibre light concrete and high-strength concrete are folded waters compound beam, it is characterized in that, comprises foldedly watering all-in-one-piece steel fibre light concrete and high-strength concrete, and the bottom is the steel fibre light concrete, and high-strength concrete is cast on the steel fibre light concrete.

2. steel fibre light concrete as claimed in claim 1 and high-strength concrete are folded to water compound beam, it is characterized in that: said folded cross section of watering compound beam is a rectangle, and the height of steel fibre light concrete is no more than 70% of deck-molding.

3. steel fibre light concrete as claimed in claim 1 and high-strength concrete are folded to water compound beam, it is characterized in that: said folded cross section of watering compound beam is a T shape, and the height of steel fibre light concrete is no more than 90% of web height.

4. steel fibre light concrete as claimed in claim 1 and high-strength concrete are folded to water compound beam, it is characterized in that: said folded cross section of watering compound beam is a box-shaped, and the steel fibre light concrete is 100 millimeters apart from the top board bottom level.