3 results about "Sheet pile" patented technology

The invention discloses an anti-seepage method for a deepwater hard rock steel sheet pile cofferdam, which comprises the following steps of: drilling a hole guide groove in a field rock-soil layer by using a hole guide machine so as to insert and fix the lower end of a steel sheet pile; after the hole guide groove is formed, throwing coarse sand for filling the groove hole firstly, and then throwing clay for filling the hole guide groove till a groove opening is filled; driving a steel sheet pile which is manufactured in advance and provided with a grouting pipe into the throwing and filling soil of the hole guide groove till the built-in depth which is designed in advance is reached, and after the steel sheet pile enters the position, injecting cement mortar into the hole guide groove through a grouting pipe with a hole; before the cement mortar is solidified, arranging an ultrasonic density sensor in the groove to monitor the density change of the soil body in the groove in real time, continuing grouting when the density of the soil body does not reach a design value, and stopping grouting once the density of the soil body reaches the requirement; and pumping water from the inner side of the steel plate cofferdam after the cement mortar is solidified. Most double-wall steel cofferdam construction schemes can be replaced, the number of temporary cofferdam projects is greatly reduced, and the application range of the steel sheet pile cofferdam technology is greatly expanded.

The invention provides a recyclable valve type pile tip, and belongs to the technical field of structural components such as foundation engineering special piles or pile shoes. The recyclable valve type pile tip comprises a tip body and a base body, wherein the tip body is of a conical structure, the base body is of a cylindrical structure, the base body is installed on the tip body, the tip body is formed by splicing equant pile petals, and a bearing is fixed in the middle of the base body; the base body is formed by splicing equant valves, and a rail is arranged on the inner wall of the base body; and the pile petals move along the rail, so that the pile petals are folded and unfolded, each valve is connected with the bearing through a connecting rod, and a connecting plate is parallel to the bearing. The recyclable valve type pile tip is applied to installation of steel sheet piles, and has the advantages of being easy and convenient to assemble, convenient to install, recyclable, high in piling positioning precision and the like.