Construction spreading foundation adaptive to filled ground settlement and construction method

Abstract

The invention discloses a construction spreading foundation adaptive to a filled ground settlement and a construction method. The construction spreading foundation comprises an overhanging structure on the upper portion of a pillar foundation, the pillar foundation, a construction spreading foundation body, a cushion block layer and a basement cushion layer. The method for heightening the settled construction spreading foundation includes the following steps: 1) excavating filling until to the basement cushion layer; 2) horizontally arranging an ejecting beam under the overhanging structure on the upper portion of the pillar foundation; 3) placing jacks under the portions close to two ends of the ejecting beam; 4) ejecting the ejecting beam through the jacks; 5) filling cushion blocks between the construction spreading foundation body and the basement cushion layer under the construction spreading foundation body; and 6) finally, demounting the jacks and the ejecting beam, and placing the filling back. The construction spreading foundation is reasonable in structure, convenient to construct, safe and reliable, can effectively avoid bad influence to foundation construction and normal use of architectural structures caused by foundation settlement, and has good economic benefit and time benefit in engineering construction, and the height of the foundation can be adjusted at any time according to requirements.

Description

technical field [0001] The invention relates to a building expansion foundation structure, in particular to a light or low-rise building expansion foundation adapted to the settlement of the filling foundation and a method for increasing its height after settlement. Background technique [0002] Construction in mountainous towns with undulating terrain often requires extensive excavation and filling when leveling the site. However, due to project cost and construction period requirements, it is often difficult to achieve compaction and compaction. If the house is built on fill that does not meet the compaction quality requirements In the area, when construction is carried out before the settlement of the fill foundation is not stable, such fill foundation will settle as time goes by, and this settlement will directly lead to the corresponding settlement of the building foundation, so that in the building structure above the foundation Harmful secondary stresses are generated...

AI Technical Summary

Problems solved by technology

[0002] Construction in mountainous towns with undulating terrain often requires extensive excavation and filling when leveling the site. However, due to project cost and construction period requirements, it is often difficult to achieve compaction and compaction. If the house is built on fill that does not meet the compaction quality requirements In the area, when construction is carried out before the settlement of the fill foundation is not stable, such fill foundation will settle as time goes by, and this settlement will directly lead to the corresponding settlement of the building foundation, so that in the building structure above the foundation Harmful secondary stresses are generated, and the building structure is deformed, cracked or even unstable, which seriously affects the safety of the building structure. Therefore, it is often necessary to carry out foundation treatment on the fill foundation or use a relatively expensive pile foundation to transfer the load to the fill. In the stable stratum below the soil layer, not only the construction is cumbersome and the workload is heavy, but also the amount of materials used is large, and more economic costs are required

If you wait for the settlement of the uncompacted fill foundation to stabilize before proceeding with building construction, the time required to wait for the fill to consolidate is generally at least about 5 years from the beginning of the fill, such as waiting for the new fill to be consolidated It will be more expensive to build later

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