What is the cover foundation? In Cao Qihua's words, it is composed of the foundation beams of internal and external wells as the skeleton, plus the external shaft wall and roof of single-layer steel mesh. Taking the construction site as an example, Cao Qihua explained to reporters that the house should not be piled. The outer shaft skeleton around it is only a building foundation with a depth of 1.3 meters, while the inner shaft is only a building foundation with a depth of 0.5 meters. After the skeleton is completed, the steel mesh is laid on the skeleton to make a reinforced concrete triple roof, which is not only the cover plate of the foundation, but also the bottom plate of the whole building. This design connects the house into a whole, making the building flexible and complete. The experts from the Ministry of Construction have come to the conclusion that the covered foundation is novel and simple in shape, convenient in construction, resource-saving, and the bearing capacity of the covered soil is increasing, which has good economic advantages compared with raft foundation and pile foundation. Multi-storey houses can be built by using platform foundation without piling. Using this technology to build houses can not only save costs, but also resist major earthquakes. This is the platform foundation invented by Cao Qihua, a folk in Shunde. Experts from Foshan Institute of Science and Technology visited the site, and Cao Gong explained his theory to the visitors.
Cao Gong, who is over 70 years old, was inspired by the Tangshan earthquake. During the Tangshan earthquake, he was the director of the production department of the third construction company in Hebei Province. He has participated in earthquake relief work. Faced with the collapse of buildings and all kinds of tiles, he is eager to build a tumbler building. With a solid mathematical foundation, Cao Gong found that the existing formula of bending distance in building mechanics has certain derivation errors.
As a result, all kinds of building foundations have not solved the connection problem between rigid buildings and flexible soil. Cao Gong conceived to cover the soil in the form of a "composite bowl". With the more and denser the covering soil, the greater the role of sharing and dispersing force. At the same time, it has the strong scattering ability connecting the center of rigid objects and the weak scattering ability of the periphery, and realizes the soft landing mechanism between rigid buildings and flexible earth. This is the theoretical germination of "no pile" and "covering platform foundation" Thanks to 1985, Cao Gong returned to Shunde from the north with his wife. At that time, he borrowed money from relatives and friends to build a three-story house to test the platform foundation he invented. Driven by him, two other people also built a three-story building with his invention. 199 1 year, experts from the Ministry of Construction made a special trip to Jinjie, Shunde to "make a stoma". National experts thought that Cao Gaitai was an innovative technology and could be established. 1994, "Physicochemical of Bletilla jujuba, a patent of Defoe's invention. In the 1990s, a large number of single-family buildings with three or four floors were built in Shunde and its surrounding areas. Cao Gong applied his podium theory to the practice of folk architecture. During the day, he runs around the building, climbs the ground and climbs the K, which has a good foundation. He put on 400-degree reading glasses and looked at it on his desk, working hard for the basic theory of the podium. Today, Zhuo Zhiji I has built more than 200 residential buildings in Shichongde, Nanhai, Gaoming, Zhongshan and other places, but none of these buildings have any defects, and even structural cracks have appeared along the way which are described as inevitable by the construction industry.