摘要:
A tensionless concrete pier foundation for supporting a tower and a method of constructing the same is provided, the foundation having an outer CMP and an inner CMP with an annular space therebetween in which a plurality of sleeved tower anchor bolts are embedded, at least the outer CMP having an upper edge that is flush with the top of the foundation after the tower has been installed. A method of plumbing a tower anchor bolt cage using a bolt alignment ring is also provided that includes coupling the upper ends of the CMPs together with lateral spacing bolts that extend across the annular space. The tower anchor bolt cage is suspended from the lateral spacing bolts by the bolt alignment ring, and the lateral spacing bolts are shimmed on a low side as necessary for leveling the alignment ring and plumbing the bolt cage, before concrete pour.
摘要:
A new pile assembly is disclosed. It comprises an open end pipe pile (a cylindrical pipe pile provided with a pile cap) that is provided with: (1) a diaphragm adapted to slide axially within said open end pipe pile; (2) a conduit that allows gases and liquids to flow to and from the upper portion of the interior of said open end pipe pile through a conduit port; and (3) a one-way valve that allows gases and liquids to flow from an inlet port (that is below said conduit port) in the interior of said open end pipe pile to an exhaust port on the exterior of said open end pipe pile. The preferred embodiment of the invention also comprises: (4) an open end pipe pile with a lower end of reduced interior diameter; (5) means for retaining drilling mud in the lower portion of said open end pipe pile; and (6) a flexible riser in the interior of said open end pipe pile that provides a passageway for liquids and gases from said inlet port to said one-way valve.A new process for driving an open end pipe pile into the sea floor at significant depths below the ocean surface is also disclosed. It comprises the steps of: (1) displacing liquid from the interior of an open end pipe pile (that has initially penetrated the sea floor) to the ambient by forcing compressed gas into the upper portion of said open end pipe pile; and (2) evacuating or venting said compressed gas from the upper portion of said open end pipe pile to the atmosphere thereby causing said pile to be driven by existing hydrostatic pressure. In the preferred embodiment of the process, the hydrostatic pile driving is done in a plurality of stages, with each stage comprising said steps (1) and (2). The preferred embodiment of the process also comprises the use of drilling mud: to provide lubrication between the diaphragm and the interior surface of the pipe pile, and between the exterior surface of the soil core and the interior surface of the pipe pile; and to give additional weight to the pile assembly thereby increasing the initial penetration of the sea floor, and preventing piping during the hydrostatic pile driving of step (2).
摘要:
A device for the control of the internal pressure in a drill pipe or tremie is disclosed. The tremie is used in footings and especially in the construction of compressed concrete footings. The tremie has a valve located in a lid that serves for the tight seal of the tremie. The valve is subjected to a counter-pressure which is greater than the effective power of the internal pressure of the tremie. A hoisting cable is connected to the valve stem and the power of the hoisting cable under normal operating conditions in combination with the internal pressure of the tremie is large enough to overcome the counterpressure. The valve is shifted to vent the internal pressure of the tremie when the same is rapidly removed from the footing bore due to a decrease in ground friction.
摘要:
A pre-stress corrosion-resistant tubular pile used in special coastal geological conditions and manufacturing method thereof is disclosed. The raw materials and proportions of the pre-stress corrosion-resistant tubular pile are as follows: 350-450 parts by weight of cement; 90-135 parts by weight of an ore powder; 600-700 parts by weight of sand; 100-120 parts by weight of stones; water and a water reducing agent; wherein the cement and ore powder are gels; the weight ratio of water to the gels is 0.30-0.31, and the mass ratio of the water reducing agent to the gels is (1.8-2.2):100.
摘要:
A device which includes a ram and a tube, which device can be used for the production of earth holes and poles which are located in these holes and which poles are made of poured or compressed concrete and a process using this device.
摘要:
A process and system for ground consolidation and increasing the load capacity of piles wherein the lower end of a bore hole is enlarged upon injection of a high pressure liquid, the pressure of which is periodically varied at a high frequency to cause compression and consolidation of the surrounding ground area and the widening of the lower end of the bore hole. Reinforcing anchorage structure is mounted within the bore hole and embedded within hardened concrete or like material, and a stressing steel rod is fixed to the anchorage and extends upwardly through the bore hole for connection to suitable building support structure mounted at ground level.