Experimental Study On The Treatment Of The Port Foundation By The Method Of The No Packing Vibration And Compaction

This paper takes a port foundation treatment as engineering background,in this paper,the field test research on the ground soil of different engineering geology conditions,such as the rear land area vibration,the in situ vibration and the sea-fill vibration,is discussed,according to the ground subsidence monitoring data and the standard penetration test results,the parameters of the excavation of the foundation soil in the port are analyzed,The suitable construction parameters such as vibration power,horizontal vibration distance and lifting spacing of vibrating head are studied.The layered vibration-punching scheme proposed in this paper can effectively solve the problem of plugging in deep water area,the vibration effect is not good,and the monitoring value of the foundation settlement under the additional stress after the sea is compared with the theoretical value calculated by the standard method,it is indicated that the theoretical value predicted by this method is of some reference value to predict the final settlement.The main conclusions of this paper are as follows:(1)through the rear land area vibration test,it is recommended that the Vibro-punching construction parameters: the Vibration impulse power is 100 kw,the horizontal vibration punching distance is 3.0m,and the vibration punching head lifting distance is 0.5m;(2)combined with the results of marine in situ vibration test,when the formal construction of the vibration parameters recommended: The vibration power of 75 kw,horizontal vibration distance of 2.5m,vibration head lifting distance of 0.5m,;or the power of the vibration of 100 kw,horizontal vibration blanking distance of 3.0m,vibration punch head lifting distance of 0.5m,The specific plan is determined according to the actual situation.(3)based on the deep water pressure and large thickness of sand layer,it is suggested that the ice V230 hydraulic vibrator be used for layered vibration,and the construction parameters are as follows: The vibration power is 230 kw,the horizontal vibration blanking distance is 3.0m and the lifting distance is 0.5m;(4)Comparing the monitoring value of the foundation settlement with the settlement calculated value under the additional stress after the sea shock,it is found that the calculation result of the standard method is less than the actual settlement,but it can basically reflect the settlement trend and law,which indicates that it has some reference value to predict the final settlement by the modified theory of the number of hits after the shock.