Statically pressed pile high-pressure whirl jet lead hole construction method
A technology of high-pressure rotary spraying and construction methods, which is applied in the direction of sheet pile walls, foundation structure engineering, construction, etc., can solve problems such as difficult penetration, large amount of soil discharged, and influence on foundation treatment, and achieve simple process, easy movement, Excellent effect of pile pressure
Active Publication Date: 2011-09-28
TIANJIN TIANYI CONSTR GRP
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Problems solved by technology
The current drilling equipment is mostly constructed by the dry operation method of the long auger drilling machine, but this technology and equipment are restricted by many factors such as its working depth, large amount of soil discharged, groundwater level, power consumption, and easy movement of the machine body; serious Affect foundation treatment, bring special foundation pile technology due to difficulties, such as silt layer is a hard shell, it is difficult to penetrate during construction
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Embodiment 1
[0033] The construction method of the static pressure pile high-pressure rotary spraying pilot hole, the construction steps include:
[0034] 1. For positioning measurement, since the static compactor is more serious for the surrounding soil, the total station or polar coordinate method should be used to measure the pile position, and the control pile should be led to the less affected part;
[0035] 2. Drilling rig in place: Move the rotary jet drilling rig to the designated pile position, align the drill bit to the center of the hole, and level the drilling rig at the same time, place it stably and horizontally, and the verticality deviation of the drill pipe is not more than 1% to 1.5%. After being in place, first conduct a low-pressure (0.5Mpa) water jet test to check whether the nozzle is unblocked and whether the pressure is normal. Construct according to the conventional construction sequence, try not to go back as far as possible, so as to avoid the subsidence of the s...
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The invention relates to a statically pressed pile high-pressure whirl jet lead hole construction method, which belongs to the technical field of foundation construction. The statically pressed pile high-pressure whirl jet lead hole construction method comprises the following construction steps: 1), preparing to drill a hole: moving a whirl jet drill, aiming the drill bit in the center of a hole position, leveling the drill and holding the drill steadily and horizontally; 2) high-pressure whirl jet drilling: drilling with or without low-pressure water jet, increasing the pressure of a pressure pump to 18 to 30mp to spray clear water when drilling to a hard interlayer, and stopping drilling when drilling to a design standard height, wherein the high-pressure whirl jet forms a saturated disturbing body with the same diameter as the pile in the hard sand layer; 3) hoisting the drill bit: conveying pressure jet water through the pressure pump in a drill bit hoisting process, detaching a drill stem, and stacking the drill stem on a drill stem piling bin; and 4) conveying the pile by a statically pressed pile driver: statically pressing the pile at the end of the high-pressure whirl jet, wherein when the pile sinks, the standard height of the pile bottom is used as a reference. The invention has the advantages of simple process, convenient construction, easy movement, accurate positioning, low cost, quick construction, high pressed pile quality, good construction effect and the like.
Description
technical field [0001] The invention belongs to the technical field of foundation construction, in particular to a method for constructing a static pressure pile high-pressure swirling jet hole. Background technique [0002] At present, the static pressure pile has the advantages of low noise, low cost, easy guarantee of quality, and fast construction speed, so it is designed and widely used; the high-pressure rotary grouting machine is mainly used in foundation treatment, curtain water stop construction, etc. The current drilling equipment is mostly constructed by the dry operation method of the long auger drilling machine, but this technology and equipment are restricted by many factors such as its working depth, large amount of soil discharged, groundwater level, power consumption, and easy movement of the machine body; serious It affects foundation treatment and brings special foundation pile pressing technology due to difficulties. For example, the silt layer is a hard ...
Claims
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IPC IPC(8): E02D7/26
Inventor 胡永钢许丽华刘清来
Owner TIANJIN TIANYI CONSTR GRP