|
Soft soil area in Hangzhou, Shaoxing more than 5 meters and excavation excavation of a large area of soft soil foundation , if the combination of piles supporting piles envelope construction method combined with center island , less economic and construction process is more complex, traditional soil nailing in soft soil and another into the shortcomings of low hole hard and pullout resistance . Cement mixing anchor tube as a new type of soil nails , combined with pit passive soil reinforcement and dump grading , excavation depth of 6-8 m of soft soil foundation envelope method . The anchor pipe combined with the practice of the passive zone soil reinforcement retaining system are as follows : first hit set cement mixing pile doubles as a sealing curtain , while playing in the pit passive zone cement mixing pile reinforced soil , in the process of excavation , sub- layer excavation and drilling side edge grouting construction methods set up to fight the cement mixing anchor tube , the shotcrete surface protection . In the study on the basis of previous composite soil nailing protection, the passive zone soil reinforcement , cement mixing anchor tube , according to the practical application of engineering characteristics , the use of traditional theoretical research , field test , finite element software method of combining , the anchor tube reinforced soil retaining system combined with passive zone principle , calculation , design, construction , and some useful results . The main contents are as follows : test the mechanism of action of the cement mixing anchor pipe and force characteristics , summed up the application conditions , application methods , explains the difference between the with traditional soil nail and bolt through the finite element simulation that the effectiveness of the passive zone soil reinforcement and the reinforcement method .
|