CN212582714U

CN212582714U - Fully-assembled prefabricated raft foundation

Info

Publication number: CN212582714U
Application number: CN202021131571.6U
Authority: CN
Inventors: 孙岩; 姜波; 彭益成; 华坤
Original assignee: Shanghai Electric Power Design Institute Co Ltd
Current assignee: Shanghai Electric Power Design Institute Co Ltd
Priority date: 2020-06-18
Filing date: 2020-06-18
Publication date: 2021-02-23
Anticipated expiration: 2030-06-18

Abstract

The utility model discloses a prefabricated raft foundation of full assembled, at least including the prefabricated segment of a plurality of, every leave prestressing force pore canal on the prefabricated segment respectively, the hole of exhausting is reserved in the prestressing force pore canal, prefabricated segment scribbles the structure in piece department and glues, and is a plurality of wear to be equipped with a plurality of bundles of prestressing tendons in the prestressing force pore canal. The utility model discloses a raft foundation is constituteed to a plurality of prefabricated sections, when the assembly, need not to adopt cast-in-place mode, and prefabricated section can be prefabricated in mill to assembled building's time limit for a project has been reduced.

Description

Fully-assembled prefabricated raft foundation

Technical Field

The utility model relates to a building foundation technical field especially relates to a prefabricated raft foundation of full assembled.

Background

The prefabricated assembled structure is one of the important directions of the development of the building structure in China, is beneficial to the development of the industrialization of the building in China, improves the production efficiency, saves energy, develops green and environment-friendly buildings, and is beneficial to improving and ensuring the quality of the building engineering. With the development and improvement of the assembly type technology, more and more buildings adopt assembly type technology systems.

At present, most of the applications of prefabricated assembled foundations at home and abroad are limited to independent foundations or small-sized structure foundations, the foundations of the assembled building structures still mainly adopt reinforced concrete cast-in-place structures, the cast-in-place foundations greatly reduce the construction period of the assembled building, protect the environment and the like, and become one of the bottlenecks of the assembled building.

The person skilled in the art is dedicated to solving the above technical drawbacks.

SUMMERY OF THE UTILITY MODEL

In view of the above-mentioned defect of prior art, the technical purpose of the utility model is to solve the problem that present cast-in-place raft foundation has reduced advantages such as time limit for a project, environmental protection of fabricated construction.

For realizing above-mentioned technical purpose, the utility model provides a prefabricated raft foundation of full assembled includes a plurality of prefabricated segment section, every at least leave the prestressing force pore canal on the prefabricated segment section respectively, it has the exhaust hole to reserve in the prestressing force pore canal, prefabricated segment section scribbles the structure in piece department and glues, and is a plurality of wear to be equipped with a plurality of bundles of prestressing tendons in the prestressing force pore canal.

Preferably, the adjacent prefabricated sections are connected by adopting a plain connection or a tongue-and-groove connection.

Preferably, the structural adhesive is an epoxy resin adhesive.

Preferably, the prestressed reinforcing steel is a prestressed steel strand.

The utility model has the advantages that:

the utility model discloses because above-mentioned structural design, raft foundation is constituteed to a plurality of prefabricated sections, when the assembly, need not to adopt cast-in-place mode, and prefabricated section can be prefabricated in mill to assembled building's time limit for a project has been reduced.

Drawings

Fig. 1 is a schematic overall structure diagram of the present invention;

FIG. 2 is a schematic view of a part of the structure of the present invention;

FIG. 3 is a schematic structural view of a prefabricated segment according to the present invention;

fig. 4 is a schematic structural view of the prefabricated sections of the present invention connected by tongue-and-groove.

In the figure: 3 prefabricated segments, 4 prestressed ducts, 5 exhaust holes, 6 prestressed ribs and 7 structural adhesive.

Detailed Description

The conception, the specific structure and the technical effects of the present invention will be further described with reference to the accompanying drawings, so as to fully understand the objects, the features and the effects of the present invention.

Example (b):

as shown in fig. 1-4, a fully assembled prefabricated raft foundation is formed by dividing the raft foundation into a plurality of prefabricated sections made of reinforced concrete, transporting the prefabricated sections to a construction site after factory prefabrication, reserving pre-stressed ducts 4 in two directions in the prefabricated sections by means of metal corrugated pipes or pipe pumping methods and the like, and reserving a plurality of exhaust holes 5 in the pre-stressed ducts 4.

The adjacent prefabricated segments are connected by adopting flat or tongue-and-groove, and the shear resistance between the segments can be increased by the tongue-and-groove connection.

Vertical concrete members (such as columns, basement side walls, inner walls and the like) on the raft foundation are connected through the pre-reserved steel bars or foundation bolts on the raft in a construction mode of grouting sleeves, slurry anchor lap joint, mechanical connection or the like.

After the prefabricated sections 3 are transported to a construction site, structural adhesive 7 is coated at the section joint of the adjacent prefabricated sections, the structural adhesive 7 can be epoxy resin adhesive, a plurality of prestressed tendons 6 (the prestressed tendons 6 can be steel strands, steel wires and the like) are penetrated in the prestressed pore channels 4, the prestressed tendons 6 are temporarily tensioned by a jack, the adjacent prefabricated sections are bonded together, and then the prestressed tendons 6 are pulled out for assembling the next prefabricated section.

By the mode, all the steel prefabricated segments are spliced and bonded together, the prestressed tendons 6 penetrate into the prestressed duct 4 for permanent tensioning, cement slurry is injected into the prestressed duct 4, and the exhaust holes 5 emerge the cement slurry to indicate that the whole duct is filled with the slurry.

The joints of adjacent prefabricated segments should be left in the less stressed positions.

The construction steps are as follows:

the method comprises the following steps: excavating a foundation pit, constructing a cushion layer and a waterproof layer;

step two: the prefabricated sections are synchronously manufactured in a factory and are transported to a construction site to be positioned in sequence;

step three: coating structural adhesive 7 at the abutted seams of the adjacent prefabricated sections;

step four: the prestressed tendons 6 penetrate through the prestressed duct 4 and are temporarily tensioned;

step five: repeating the steps until all the prefabricated sections are in place and bonded;

step six: penetrating a permanent prestressed tendon 6, and performing subsection, symmetrical tensioning and anchoring;

step seven: grouting a prestressed duct 4;

step eight: sealing the anchor with concrete;

step nine: and carrying out superstructure construction.

The foregoing has described in detail preferred embodiments of the present invention. It should be understood that numerous modifications and variations can be devised by those skilled in the art in light of the teachings of the present invention without undue experimentation. Therefore, the technical solutions that can be obtained by a person skilled in the art through logic analysis, reasoning or limited experiments based on the prior art according to the concepts of the present invention should be within the scope of protection defined by the claims.

Claims

1. The utility model provides a prefabricated raft foundation of full assembled, its characterized in that: the prestressed concrete slab at least comprises a plurality of prefabricated segments, each prefabricated segment is provided with a prestressed pore channel, an exhaust hole is reserved in each prestressed pore channel, structural glue is coated at the splicing seams of the prefabricated segments, and a plurality of prestressed tendons penetrate through the prestressed pore channels.

2. The fully assembled prefabricated raft foundation of claim 1, wherein: and the adjacent prefabricated sections are connected by adopting plain connection or tongue-and-groove connection.

3. The fully assembled prefabricated raft foundation of claim 1, wherein: the structural adhesive is epoxy resin adhesive.