Structural foundation

Abstract

An object of the invention is to provide a structural foundation wherein a spiral pile for supporting the foundation can be fixed in such a stable manner as not to displace in the horizontal direction or not to subside in the vertical direction. The structural foundation can be easily installed on site with reduced costs for transportation and installment so as to support a structure or part of a structure. The structural foundation ( 3 ) has a foundation portion ( 2 ) to be fixed to the ground using a spiral pile ( 1 ), and is characterized in that the foundation portion ( 2 ) has a cylindrical steel tube ( 23 ) for guiding the spiral pile ( 1 ) and a portion ( 21 ) for receiving pressure in the horizontal direction, which is placed so as to surround the cylindrical steel tube ( 23 ), and the foundation portion ( 2 ) and the spiral pile ( 1 ) are provided with a fixing means ( 12, 22 ) for connecting the foundation portion ( 2 ) and the spiral pile ( 1 ) in a state where the spiral pile ( 1 ) is inserted into the cylindrical steel tube ( 21 ) and the spiral pile ( 1 ) is embedded in the ground.

1 . A structural foundation for supporting a structure or part of a structure, comprising
 a foundation portion and a spiral pile, said foundation portion to be fixed to the ground using the spiral pile, wherein   the foundation portion has comprises a cylindrical steel tube for guiding the spiral pile, and a portion for receiving pressure in a horizontal direction, which is placed so as to surround the cylindrical steel tube, and   the foundation portion and the spiral pile are provided with a fixing means for connecting the foundation portion and the spiral pile in a state where the spiral pile is inserted into the cylindrical steel tube and the spiral pile is embedded in the ground.   
     
     
         2 . The structural foundation according to  claim 1 , wherein
 the spiral pile has a spiral portion formed by twisting a flat steel plate, and a tubular portion for housing and holding one end of the spiral portion, and   the tubular portion is placed inside the cylindrical steel tube when the spiral pile and the foundation portion are integrated.   
     
     
         3 . The structural foundation according to  claim 2 , wherein the fixing means is formed of a first flange provided as a portion of the cylindrical steel tube or as a portion of the portion for receiving pressure in the horizontal direction, and a second flange provided as a portion of the tubular portion, and
 the foundation portion and the spiral pile are connected when the flanges are connected and fixed to each other.   
     
     
         4 . The structural foundation according to  claim 1 , wherein the portion for receiving pressure in the horizontal direction is formed of a cylindrical steel tube or formed by joining together sections of a steel H beam, a steel I beam, a steel channel and a steel angle. 
     
     
         5 . The structural foundation according to  claim 1 , wherein
 the foundation portion has a portion for receiving pressure in a vertical direction, and   the portion for receiving pressure in the vertical direction is a flat steel plate provided in a space between the cylindrical steel tube and the portion for receiving pressure in the horizontal direction.   
     
     
         6 . The structural foundation according to  claim 1 , wherein a part including the cylindrical steel tube and a part including the portion for receiving pressure in the horizontal direction are separable from each other. 
     
     
         7 . The structural foundation according to  claim 6 , wherein
 the part including the cylindrical steel tube and the part including the portion for receiving pressure in the horizontal direction are linked together,   the spiral pile is fixed to either the part including the cylindrical steel tube or the part including the portion for receiving pressure in the horizontal direction, and   a space between the cylindrical steel tube and the portion for receiving pressure in the horizontal direction is filled in with concrete that has been poured so as to cover an area where the parts are linked together and an area where the spiral pile is fixed and solidified.   
     
     
         8 . The structural foundation according to  claim 1 , wherein at least either one of the spiral pile and the fixing means of the foundation portion is provided with an installation angle adjusting means with which the angle at which the spiral pile is installed and fixed in the ground is adjusted. 
     
     
         9 . The structural foundation according to  claim 1 , wherein at least either one of the spiral pile and the foundation portion is provided with a structure adjusting means with which at least either one of the height or the degree of levelness of the supported structure can be adjusted while the structure is being installed. 
     
     
         10 . The structural foundation according to  claim 2 , wherein the portion for receiving pressure in the horizontal direction is formed of a cylindrical steel tube or formed by joining together sections of a steel H beam, a steel I beam, a steel channel and a steel angle. 
     
     
         11 . The structural foundation according to  claim 3 , wherein the portion for receiving pressure in the horizontal direction is formed of a cylindrical steel tube or formed by joining together sections of a steel H beam, a steel I beam, a steel channel and a steel angle. 
     
     
         12 . The structural foundation according to  claim 2 , wherein
 the foundation portion has a portion for receiving pressure in a vertical direction, and   the portion for receiving pressure in the vertical direction is a flat steel plate provided in a space between the cylindrical steel tube and the portion for receiving pressure in the horizontal direction.   
     
     
         13 . The structural foundation according to  claim 3 , wherein
 the foundation portion has a portion for receiving pressure in a vertical direction, and   the portion for receiving pressure in the vertical direction is a flat steel plate provided in a space between the cylindrical steel tube and the portion for receiving pressure in the horizontal direction.   
     
     
         14 . The structural foundation according to  claim 4 , wherein
 the foundation portion has a portion for receiving pressure in a vertical direction, and   the portion for receiving pressure in the vertical direction is a flat steel plate provided in a space between the cylindrical steel tube and the portion for receiving pressure in the horizontal direction.   
     
     
         15 . The structural foundation according to  claim 2 , wherein a part including the cylindrical steel tube and a part including the portion for receiving pressure in the horizontal direction are separable from each other. 
     
     
         16 . The structural foundation according to  claim 3 , wherein a part including the cylindrical steel tube and a part including the portion for receiving pressure in the horizontal direction are separable from each other. 
     
     
         17 . The structural foundation according to  claim 2 , wherein at least either one of the spiral pile and the fixing means of the foundation portion is provided with an installation angle adjusting means with which the angle at which the spiral pile is installed and fixed in the ground is adjusted. 
     
     
         18 . The structural foundation according to  claim 3 , wherein at least either one of the spiral pile and the fixing means of the foundation portion is provided with an installation angle adjusting means with which the angle at which the spiral pile is installed and fixed in the ground is adjusted. 
     
     
         19 . The structural foundation according to  claim 4 , wherein at least either one of the spiral pile and the fixing means of the foundation portion is provided with an installation angle adjusting means with which the angle at which the spiral pile is installed and fixed in the ground is adjusted. 
     
     
         20 . The structural foundation according to  claim 5 , wherein at least either one of the spiral pile and the fixing means of the foundation portion is provided with an installation angle adjusting means with which the angle at which the spiral pile is installed and fixed in the ground is adjusted.