Excavation foundation bottom end reaming device
A technology for excavating foundations and hole heads, which is applied to drilling equipment, earthwork drilling, drill bits, etc. It can solve the problems of being unsuitable for other drilling methods, difficulty in reaming holes at the bottom, and affecting the ecological environment. It achieves light weight, Good reaming and forming, simple operation
Active Publication Date: 2015-06-17
STATE GRID CORP OF CHINA +1
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Problems solved by technology
[0002] At present, the tower foundations of transmission lines mainly adopt shallow foundations. The concrete consumption of shallow foundations and the amount of earth and stone excavated in foundation pits are relatively large. The contradiction between ecological environment and environmental protection requirements is becoming more and more prominent. Therefore, an environmentally friendly independent medium-sized pile foundation is newly designed, which can reduce the consumption of foundation concrete, reduce the amount of earth and rock excavated for foundation pits, reduce the occupied area, and protect the ecology. environment, the construction process is simple, and the cost is low; but because the diameter of the pile head at the bottom is required to be larger than the hole diameter, and the environmental protection independent medium-sized pile foundation has a small hole diameter, people cannot go down, and it is very difficult to expand the hole at the bottom
Chinese patent CN10214088A excavation drilling rig proposes a bottom expansion drill bit (70), but it is dedicated to this drilling rig and cannot be used in other drilling methods
Method used
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[0021] figure 1 It is a schematic diagram of excavating the foundation. 1 is the iron tower, 2 is the main column of the foundation, and 3 is the pile head at the bottom. Since the diameter of the pile head at the bottom is required to be larger than the diameter of the main column of the pile foundation, and the diameter of the main column of the pile foundation is small, people cannot go down. , Bottom reaming is very difficult. Figure 2 to Figure 12 It is a schematic diagram of the structure of the bottom reaming device for excavating the foundation in this embodiment, figure 2 is the schematic diagram of the initial state structure, image 3 It is a schematic structural diagram of the hole reaming principle in this embodiment, Figure 4 yes figure 2 A-A sectional schematic diagram, Figure 5 yes image 3 B-B section schematic diagram, Figure 6 is attached image 3 sectional view; the reaming device at the bottom of the excavation foundation is composed of an a...
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The invention discloses an excavation foundation bottom end reaming device which is composed of a pore diameter size adjusting rod (4), a torque transmission rod (5) and a lantern-shaped reaming head (6), and the pore size adjusting rod (4) is composed of a rocking handle, a screw, a rotary lifting converter, a lifting rod and thrusting round steel. A rotary pushing rod sleeve and nuts are welded to the upper end of the torque transmission rod (5), and a cross-shaped shifting-rotating rod is welded to the lower end of the torque transmission rod (5). The lantern-shaped reaming head (6) is composed of round steel boards at the upper end and the lower end and a plurality of soil-scrapping steel pieces. When the excavation foundation bottom end reaming device is used, the device is put into an already-punched foundation primary column hole, a pushing rod is inserted in the rotary pushing rod sleeve, the pushing rod is pushed and the rocking handle are rocked at the same time, and the soil-scraping steel pieces of the lantern-shaped reaming head (6) can bulge and scrape the soil into the lantern-shaped reaming head (6); when the reaming size is achieved, a rocking handle (7) is rocked in the reversed direction, the soil-scraping steel pieces (19) are folded, the device is hoisted, and the reaming process is finished. The excavation foundation bottom end reaming device is easy to operate and convenient to use.
Description
technical field [0001] The invention relates to an excavation device for an iron tower foundation of a power transmission line, in particular to a device for expanding holes at the bottom end of an excavation foundation. Background technique [0002] At present, the tower foundations of transmission lines mainly adopt shallow foundations. The concrete consumption of shallow foundations and the amount of earth and stone excavated in foundation pits are relatively large. The contradiction between ecological environment and environmental protection requirements is becoming more and more prominent. Therefore, an environmentally friendly independent medium-sized pile foundation is newly designed, which can reduce the consumption of foundation concrete, reduce the amount of earth and stone excavated for foundation pits, reduce the occupied area, and protect the ecology. environment, the construction process is simple, and the cost is low; but because the diameter of the pile head ...
Claims
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IPC IPC(8): E21B10/32
Inventor 彭彦博
Owner STATE GRID CORP OF CHINA