CN101929158B - Statically pressed pile high-pressure whirl jet lead hole construction method - Google Patents
Statically pressed pile high-pressure whirl jet lead hole construction method Download PDFInfo
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- CN101929158B CN101929158B CN2010102785446A CN201010278544A CN101929158B CN 101929158 B CN101929158 B CN 101929158B CN 2010102785446 A CN2010102785446 A CN 2010102785446A CN 201010278544 A CN201010278544 A CN 201010278544A CN 101929158 B CN101929158 B CN 101929158B
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Abstract
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
The invention belongs to the foundation construction technical field, particularly relate to a kind of statically pressed pile high-pressure whirl jet lead hole construction method.
Background technology
At present, static pressed pile has advantages such as low noise, cheap, quality are easy to guarantee, speed of application is fast and is designed extensive use; High-pressure rotary jetting apparatus is mainly used in ground and handles, curtain water stop construction etc.The existing hole equipment that draws mostly is full screw earth auger and does the working system construction, but this technology and equipment is subjected to its working depth, discharges that the earth amount is big, groundwater table, power consumption, fuselage move and just wait all multifactor restrictions; Having a strong impact on ground and handle, bring special foundation piling technology because of difficulty, is that hard housing is difficult to penetrate in construction as the flour sand layer.
Summary of the invention
The present invention provides a kind of statically pressed pile high-pressure whirl jet lead hole construction method for solving the problem that prior art exists.
The object of the invention provides that a kind of to have technology simple, and easy construction is moved easily, accurate positioning, and cheap, speed of application is fast, pile quality, the statically pressed pile high-pressure whirl jet lead hole construction method of characteristics such as construction effect is good.
Processing step of the present invention: location survey → rig is in place and adjust drilling cramp angle → (the above drilling diameter of solid bed is not more than 150mm in boring (spray clear water), enter behind the solid bed pump pressure greater than the 25mpa drilling diameter with the stake footpath) → carry brill → mud and silt clear up → draw the hole finish telephone-moving to next → reorientate draw hole stake position → Static pressure pile driver in place → pile follower is to design elevation → as do not reach design elevation, piling is hampered, can take the interior secondary of static pressed pile pipe to draw the hole method, after drawing the hole, piling downwards is to design elevation again.
It is that employing high-pressure rotary jetting apparatus pore-forming in hard soil layer is a new technology for the static pressure machine provides condition of work that high-pressure rotary-spray draws the hole.Adopt high-pressure rotary-spray to draw the hole and utilize its plant equipment little (length only is 2.6m), draw hole depth big (can disconnect drilling rod easily) (conveniently moving, power consumption little), only handle effect (can take little pressure to hole to pass drilling rod to get final product) in the construction for upper soil horizon for disadvantageous soil layer.
Statically pressed pile high-pressure whirl jet lead hole construction method of the present invention adopts following technical scheme:
A kind of statically pressed pile high-pressure whirl jet lead hole construction method is characterized in that the statically pressed pile high-pressure whirl jet lead hole construction comprises following construction sequence:
1) boring is in place
Mobile jet drill rig with center, position, drill bit hole, flattens rig simultaneously, places steady, level;
2) high-pressure whirl jet drilling
Elder generation's low pressure water spray or do not spray water and execute brill downwards, be drilled into hard interlayer down after, increase the compression pump force value and spray clear water to 18-30mpa, high-pressure rotary-spray makes and forms the saturated interfering body of a diameter with the stake footpath in the hard layer of sand, stops boring after being drilled into design elevation;
3) carry brill
Carry compression pump pressurization pressure water spray in the brill process, dismounting drilling rod is piled up on the drilling rod piling bin;
4) Static pressure pile driver pile follower
High-pressure rotary-spray carries out piling after finishing, and is as the criterion with absolute altitude at the bottom of the stake during pile sinking.
Statically pressed pile high-pressure whirl jet lead hole construction method of the present invention can also adopt following technical measures:
Described statically pressed pile high-pressure whirl jet lead hole construction method is characterized in: when the Static pressure pile driver pile follower can not arrive absolute altitude, take that secondary draws the hole method in the static pressed pile pipe, draw behind the hole piling downwards again to design elevation.
Described statically pressed pile high-pressure whirl jet lead hole construction method is characterized in: to draw the hole be to take a spray clear water hole in to secondary in the static pressed pile pipe, on the absolute altitude during 0.3-0.8m, removes high-pressure rotary jetting apparatus at the bottom of high-pressure whirl jet is drilled into, and usefulness pile follower pile follower is to absolute altitude.
Described statically pressed pile high-pressure whirl jet lead hole construction method is characterized in: hole and carry out location survey before in place, hole when in place, the perpendicularity deviation of drilling rod is not more than 1.5%; After in place, at first carry out the low pressure hose test, check that to make nozzles clear and pressure normal; A stake unwrapping wire twice is put the stake position for the first time before the high-pressure rotary-spray, put the stake position before the static pressure machine is exerted pressure after churning is finished for the second time.
Described statically pressed pile high-pressure whirl jet lead hole construction method is characterized in: low pressure water spray compression pump pressurization pressure value is 2-15mpa during high-pressure whirl jet drilling.
Described statically pressed pile high-pressure whirl jet lead hole construction method is characterized in: high-pressure whirl jet drilling, and when increasing the compression pump force value to 18-30mpa spray clear water, rotary speed 20-25r/min.
Described statically pressed pile high-pressure whirl jet lead hole construction method is characterized in: before carrying brill back and Static pressure pile driver pile follower, carry out mud and silt particle cleaning process, adopt conduit or guide groove that mud, the water taken out of are in time cleaned out.
Described statically pressed pile high-pressure whirl jet lead hole construction method is characterized in: the Static pressure pile driver pile follower time is in the 1.5h.
Advantage that the present invention has and good effect:
Statically pressed pile high-pressure whirl jet lead hole construction method, owing to adopted brand-new technology scheme of the present invention, compared with prior art, it is simple that the present invention has technology, easy construction is moved easily, and accurate positioning is cheap, speed of application is fast, pile quality, advantage such as construction effect is good.
Description of drawings
Fig. 1 is a process flow diagram of the present invention;
Fig. 2 is a present device construction schematic diagram.
Among the figure, 1-rig, 2-ammeter, 3-high pressure slurry pump, the detachable drilling rod of 4-, the penetrable layer of 5-, the hard interlayer of 6-, the saturated soil body of 7-disturbance, 8-alloy shower nozzle.
The specific embodiment
For further understanding technology contents of the present invention, characteristics and effect, enumerate following example now, and in conjunction with the accompanying drawings, specifically be described in detail as follows:
With reference to accompanying drawing 1 and Fig. 2.
Statically pressed pile high-pressure whirl jet lead hole construction method, its construction sequence comprises:
1, location survey because the static pressure machine is comparatively serious to peripheral soil compaction, should adopt total powerstation or polar coordinates method to measure the stake position, and the control stake is caused the less position of influence;
2, rig is in place: mobile jet drill rig arrives specifies the stake position, with center, position, drill bit hole, flattens rig simultaneously, places steady, level, and the perpendicularity deviation of drilling rod is not more than 1%～1.5%.After in place, at first carry out low pressure (0.5Mpa) hose test, in order to check whether nozzle is unimpeded, and whether pressure is normal.Sequence of construction construction is not routinely retraced one's steps as far as possible, in order to avoid after ground presses again, cause Static pressure pile driver to sink; A stake unwrapping wire twice is put the stake position for the first time before the high-pressure rotary-spray, put the stake position before the static pressure machine is exerted pressure after churning is finished for the second time; Must not discharge the stake position in batch, avoid in the walking of static pressure machine pile body extruding displacement;
3, execute brill under the high-pressure rotary-spray, top is that principle is executed brill downwards with few water spray with not spraying water, about pumping pressure value 10mpa, under be drilled into hard interlayer absolute altitude (20m), increase compression pump force value (25mpa) and spray clear water, rotary speed 20～25r/min so that form the saturated interfering body of a diameter with the stake footpath in the hard layer of sand, stops boring after being drilled into design elevation;
4, carry brill: propose pumping pressure minimizing (can not close, in order to avoid drill bit blocks) in the brill process, reduce injection flow rate, the dismounting standard knot is piled up on the drilling rod piling bin on rig limit (to advance sand in order to avoid land in the pipe, block shower nozzle);
5, mud and silt particle cleaning: in time adopt conduit or guide groove that mud, the water taken out of are in time cleaned out; (earth bearing strength decline) influences the construction of Static pressure pile driver behind the very important infiltration topsoil though the mud that this job practices is taken out of and the water yield are all less;
6, high-pressure rotary-spray finishes back piling in time, finishes in 1.5h, is as the criterion with absolute altitude at the bottom of the stake during pile sinking;
7, the stake end absolute altitude not during design elevation if run into that the part pile body is depressed under the face of land in construction, adopt secondary to draw the hole method, that is: the method for high-pressure rotary-spray is sprayed clear water downwards under taking in the hole immediately, with said method execute be drilled at the bottom of 0.5m on the absolute altitude, adopt the pile follower pile follower to design elevation immediately after removing high-pressure rotary jetting apparatus.
Claims (8)
1. statically pressed pile high-pressure whirl jet lead hole construction method is characterized in that: the statically pressed pile high-pressure whirl jet lead hole construction comprises following construction sequence,
1) boring is in place
Mobile jet drill rig with center, position, drill bit hole, flattens rig simultaneously, places steady, level;
2) high-pressure whirl jet drilling
Elder generation's low pressure water spray or do not spray water and execute brill downwards, be drilled into hard interlayer down after, increase the compression pump force value and spray clear water to 18-30mpa, high-pressure rotary-spray makes and forms the saturated interfering body of a diameter with the stake footpath in the hard layer of sand, stops boring after being drilled into design elevation;
3) carry brill
Carry compression pump pressurization pressure water spray in the brill process, dismounting drilling rod is piled up on the drilling rod piling bin;
4) Static pressure pile driver pile follower
High-pressure rotary-spray is removed jet drill rig after finishing, and mixes up static pressure equipment and carries out piling, is as the criterion with absolute altitude at the bottom of the stake during pile sinking.
2. according to the described statically pressed pile high-pressure whirl jet lead hole construction method of claim 1, it is characterized in that: when the Static pressure pile driver pile follower can not arrive absolute altitude, take that secondary draws the hole method in the static pressed pile pipe, draw behind the hole piling downwards again to design elevation.
3. according to the described statically pressed pile high-pressure whirl jet lead hole construction method of claim 2, it is characterized in that: it is to take spray clear water in the hole that the interior secondary of static pressed pile pipe draws the hole, on the absolute altitude during 0.3-0.8m, remove high-pressure rotary jetting apparatus at the bottom of high-pressure whirl jet is drilled into, with the pile follower pile follower to absolute altitude.
4. according to the described statically pressed pile high-pressure whirl jet lead hole construction method of claim 1, it is characterized in that: hole and carry out location survey before in place, hole when in place, the perpendicularity deviation of drilling rod is not more than 1.5%; After in place, at first carry out the low pressure hose test, check that to make nozzles clear and pressure normal; A stake unwrapping wire twice is put the stake position for the first time before the high-pressure rotary-spray, put the stake position before the static pressure machine is exerted pressure after churning is finished for the second time.
5. according to the described statically pressed pile high-pressure whirl jet lead hole construction method of claim 1, it is characterized in that: low pressure water spray compression pump pressurization pressure value is 2-15mpa during high-pressure whirl jet drilling.
6. according to the described statically pressed pile high-pressure whirl jet lead hole construction method of claim 1, it is characterized in that: high-pressure whirl jet drilling, when increasing the compression pump force value to 18-30mpa spray clear water, rotary speed 20-25r/min.
7. according to the described statically pressed pile high-pressure whirl jet lead hole construction method of claim 1, it is characterized in that: before carrying brill back and Static pressure pile driver pile follower, carry out mud and silt particle cleaning process, adopt conduit or guide groove that mud, the water taken out of are in time cleaned out.
8. according to the described statically pressed pile high-pressure whirl jet lead hole construction method of claim 1, it is characterized in that: the Static pressure pile driver pile follower time is in the 1.5h.
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| CN102535467B (en) * | 2012-01-16 | 2015-09-30 | 中国石油大学(华东) | Ocean platform high-pressure water jet auxiliary power pile sinking construction method and pile-driving system |
| CN105239574B (en) * | 2014-06-17 | 2017-08-29 | 中建二局第一建筑工程有限公司 | Construction method applied to the static-pressure prestressed drilled pile for filling out Haiti matter |
| CN104631458B (en) * | 2014-12-23 | 2016-08-24 | 江苏谷登工程机械装备有限公司 | A kind of static pile press reaming pile sinking engineering method |
| CN105821878B (en) * | 2016-04-07 | 2017-09-12 | 隋付仁 | Prestressing concrete pipe pile pile sinking process |
| CN106759377A (en) * | 2016-12-23 | 2017-05-31 | 安徽理工大学 | The construction method of recyclable building enclosure |
| CN108252301B (en) * | 2017-10-26 | 2020-04-07 | 雨发建设集团有限公司 | High-pressure jet grouting hole-leading static pressure pile construction method |
| CN107761732A (en) * | 2017-10-26 | 2018-03-06 | 雨发建设集团有限公司 | First high-pressure rotary-spray draws hole grouting behind shaft or drift lining auxiliary static pressed pile pile sinking construction method |
| CN111455982A (en) * | 2020-04-08 | 2020-07-28 | 周力 | Static pressure hole-leading pile sinking construction method for monitoring ultra-thick pebble sand layer by laser |
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| CN1274914C (en) * | 2004-12-17 | 2006-09-13 | 曹进元 | Prewhirl spray auxiliary pile sinking construction method |
| CN100519953C (en) * | 2007-12-05 | 2009-07-29 | 中北大学 | Pile sinking method of synchronization grouting static pressure precast pile |
| NL2002543C2 (en) * | 2009-02-18 | 2010-08-24 | Sterk Midden Nederland B V | METHOD AND DEVICE FOR DRIVING A SERIES OF WALL WALL PLANKS. |
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