Precast concrete threaded pilings

An extendible, reinforced, precast concrete pile system comprising:

• (a) at least two, spiral threaded, precast pile sections placeable and connectable in line together, each of said pile sections being threaded along at least substantially its entire length with only a single, continuous set of threads of at least substantially the same pitch as that of the adjacent section;
• (b) a reinforcement core provided in each pile section, each of said cores comprising at least one longitudinally extending reinforcement bar and at least one laterally extending member, each of said members being integrally connected to said longitudinal bar;
• and
• (c) connector means associated with said pair of pile sections for attaching said pile sections together for concurrent rotation with one another.

A method for installing a concrete pile into a soil medium comprising the steps of:

• a. providing a first reinforced concrete pile member, said pile comprising:
• i. a metallic reinforcement core;
• ii. an upper metallic driving attachment connected to said core;
• and iii. a tapered concrete substantially conical mass cast symmetrically about said core for rotation therewith;
• the tapered concrete mass being provided with an equally spaced spiral thread structure from substantially top to tip;
• b. orienting the pile member in a substantially erect position;
• and c. applying rotational force to said driving attachment without direct driving engagement with said concrete mass to rotationally drive the pile member into the ground.

A method for installing a concrete pile into a soil medium comprising the steps of:

• a. providing a first reinforced concrete pile member, said first pile member comprising:
• i. a metallic reinforcement core;
• ii. an upper metallic driving attachment connected to the core;
• and
• iii. a tapered concrete substantially conical mass cast symmetrically about said core for rotation therewith, the tapered concrete mass being provided with an equally spaced thread structure from substantially top to tip.
• b. providing a second reinforced concrete pile member, said second pile member comprising:
• i. a metallic reinforcement core;
• and
• ii. a concrete mass cast about said core for rotation therewith,
• c. providing a connection means on each of the pile members for structurally joining the first and second members together;
• d. orienting the first pile member in an erect position;
• e. applying rotational force to the first pile member until its upper portion is adjacent the surface of the soil medium;
• f. connecting the first and second pile members together;
• and
• g. applying rotational force to the second pile member.