Prediction method of bearing capacity of cement-soil piles within full life circle in saline water areas

Abstract

The invention discloses a prediction method of bearing capacity of cement-soil piles with a full life circle in saline water areas. Soil samples and saline ground water are taken in project areas to be tested indoors, and test data are analyzed. The prediction method includes that the soil samples and the saline water are made into saline soil test specimens; the test specimens are respectively maintained under a curing room condition and a saline soap condition, and are subjected to unconfined compressive strength tests to have the short-term compressive strength tested respectively; the strength of the saline soil under the curing room condition is matched to acquire relationship between strength gaining of materials inside the saline soil piles and time; a deterioration depth of L is acquired and matched to acquire the relationship between the deterioration depth of the saline soil piles and the time; and finally the relationship between the bearing capacity of the saline soil piles and the time is acquired. The bearing capacity within the full life circle can be calculated according to the relationship of the saline soil piles and the time. The prediction method is simple and convenient, and measurement accuracy is high.

Description

technical field [0001] The invention relates to a civil engineering technology, in particular to a method for predicting the bearing capacity of a cement-soil pile in a salt water area during its entire life cycle. Background technique [0002] Cement-soil mixing pile is a common method for strengthening weak foundations. It uses special equipment to mix powder or slurry cement and foundation soil in situ to form a powder-sprayed pile or a slurry-sprayed pile composite foundation. In the salt water area, the groundwater and soil have a high degree of salinity, which is highly corrosive to the cement and soil, which makes the surface layer of the cement and soil deteriorate, the strength decreases, and the effective pile diameter decreases, which leads to the cement-soil mixing pile in the salt water area. The composite foundation is seriously corroded, and many engineering problems occur. At the same time, the material strength of the inner part of the cement-soil pile that...

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Problems solved by technology

[0003] The purpose of the present invention is to overcome the deficiencies of the prior art above, and to provide a method for predicting the bearing capacity of cement-soil piles in the salt water area during their entire life cycle. The bearing capacity of salt cement soil piles in the whole life cycle greatly reduces the workload of the test, is simple and fast, can avoid the time-consuming and labor-consuming problems of long-term observation, save test costs, and has high measurement accuracy

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