Something happened! The basement of a project is floating, the structure is seriously damaged, and the anti-floating design cannot be ignored!
A basement in Hangzhou floated
The basement in Hangzhou floats, the water is like a spring, and the structure is damaged and cracked to varying degrees!
Recently, Hangzhou Linping District * * a project basement floating caused the owner to protect the rights, according to the owner, the site of the basement floor arching, the bottom plate, beams and columns were damaged to varying degrees, after the situation, the construction unit took the opening of the water drainage, a large number of drainage measures, after the opening of the water such as springs, groundwater brought out of the mud hundreds of bags, piled up in the garage.
The basement is permeable like a spring
Groundwater brings out the silt
Looking at the muddy water that keeps gushing out and the damaged structure, the owner is stunned, isn't the underground hollowed out like this? I was very worried about the structural safety of the house, and complained to the quality supervision station, which immediately launched an investigation and organized relevant industry experts to conduct a careful investigation of the site.
Housing and Urban-Rural Development Bureau: Rubbing the national standard design, over-optimizing
According to the on-site investigation and preliminary test conclusions, the Housing and Urban-Rural Development Bureau reflected that the construction unit had carried out excessive "optimization" of the basement, which was too provincial, all of which were designed according to national standards, and the safety factor was reserved very low, and the construction process was uncontrollable.
The Housing and Urban-Rural Development Bureau requires the construction unit to entrust a third-party testing unit with relevant qualifications to conduct structural testing of the entire basement and conduct an overall assessment of the safety of the entire project.
(Source: Economic Life)
Builder: A third party has been commissioned to inspect and reinforce the structure
The developer explained the reason for the floating: the main reason was the mistake of the construction unit, when the backfill on the roof of the garage was not completed, the precipitation well of the site was closed in advance, and the groundwater level rose significantly when the rainy season came, and the anti-floating measures of the basement were insufficient due to human reasons, resulting in the occurrence of structural floating damage.
Now the test report of the third-party testing unit has come out, and the construction party has entrusted the design unit to carry out the basement reinforcement design.
However, the reinforcement plan has not yet been approved by the owners, and many owners have asked to move out, and the relevant matters are still being negotiated between the two parties.
Local reinforcement scheme of the project
Although there is no real picture of structural failure, from the perspective of the scheme of the reinforcement part of the column, it is completely in line with the characteristics of the floating failure form.
Nanchang Wan* basement floating destruction
There is also a design dilemma
The structural engineer also panicked in his design estimate, praying that the anti-floating water level of the project design was not reduced, and the disclaimer that the drawing did not backfill the soil prohibiting the closure of the precipitation well did not miss the standard.
Recommendations for construction units
This accident, the main responsibility of the construction unit did not run, from the description and analysis of Party A, it is caused by the construction of the construction unit without backfilling the counterweight, the precipitated well was closed in advance, think about it carefully, although Party A has carried out the limit optimization, legally speaking, you really can't find his loopholes. But this time the construction party is not wronged, who told you not to build according to the drawings?