CN104818713A - Profile steel cement soil pile construction method adaptive to various stratums - Google Patents
Profile steel cement soil pile construction method adaptive to various stratums Download PDFInfo
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- CN104818713A CN104818713A CN201510088415.3A CN201510088415A CN104818713A CN 104818713 A CN104818713 A CN 104818713A CN 201510088415 A CN201510088415 A CN 201510088415A CN 104818713 A CN104818713 A CN 104818713A
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Abstract
The invention discloses a profile steel cement soil pile construction method adaptive to various stratums. The method comprises the following steps: (A) hole forming by a drilling machine: a rotary digging or spiral or revolving impact drilling machine is adopted to form a hole in a stratum; and a slurry protective wall is formed to a protective mud skin; (B) filling and stirring of cement soil: soil is filled into the drilling hole; cement powder is added in the drilling hole by a cement soil stirring pile machine for stirring in place to form flow plastic type cement stirring soil; (C) placing of profile steel: profile steel coated with vaseline on the surface is prepared, and is put into the drilling hole by an excavator; (D) connection with a reinforcing component: the top of a profile steel cement soil pile is connected with a ring beam reinforcing component, so that each row of profile steel cement soil piles is formed to a whole support system; and (E) recovery of profile steel: the exposed profile steel is connected with a short steel beam provided with a block; the profile steel is released from the cement soil by a jack; and after the profile steel is lifted out by the excavator, the cement soil is used for filling a left hole. The method is convenient to construct, is reliable in quality, is complete in recovery of the profile steel, is suitable for various stratums, and facilitates to be promoted and applied.
Description
Technical field
The present invention and pattern foundation pit supporting structure and ground such as to process at the technical field temporarily, particularly relate to a kind of shaped steel cement earth pile construction method being adapted to multiple stratum.
Background technology
During the construction such as foundation ditch, underground passage, vertical shaft, its supporting and protection structure is much provisional, and just can remove after Practical Completion, some support engineering also can bring very large obstacle to successive projects construction.How both to have met provisional engineering safety needs, making a price reduction again cost, reduce environment pollution, make rational use of resources, is a very important technical task.Along with the requirement of country to Resources for construction economy type and friendly environment society is more and more higher, the economy, the environmental protection that realize similar above-mentioned temporary lining engineering are the active demands realizing good economic and social benefit.
In the temporary lining engineerings such as foundation ditch, stake uses one of scheme the most reliably.Therefore, to recycling and the low cost using method of material of body of a pile, the concern of some engineering construction persons is received.Involved by the stake support technology of existing patent to environmental protection has.Such as:
1, a kind of deep foundation pit built-in profile steel of Qin Hao invention can pull out formula without muscle castinplace pile (ZL:CN201410007380), and comprise shaped steel and plain concrete, shaped steel is recyclable and reuse.Weak point adopts plain concrete as backfill in stake, forms a large amount of discarded concrete, affect the construction of follow-up underground construction in the foundation ditch periphery soil body; Use concrete high expensive.
2, a kind of long-auger jet-grouting stirring concrete earth Section-steel Piles foundation ditch sealing supporting method (ZL:CN201210509637) of He Shiming invention, utilize long spiral drilling head pore-forming, jet mixing original state soil layer and cement paste on the spot, inserts shaped steel etc. subsequently and forms the cement-soil shaped steel pile body with some strength and impermeability.Advantage is to form the piling wall body closing continuous print higher-strength, the recyclable recycling of shaped steel, anchor pole or inner support in compared with hardpan.Shortcoming is that piling method is only for being applied to neither too hard, nor too soft stratum, all inadaptable for softer or harder stratum; Adopt the method efficiency of jet mixing not high, easily produce cement paste and pollute.
3, manually digging hole cement-soil Section-steel Piles foundation pit supporting method (ZL:CN201210509644) of He Shiming invention, adopts and manually digs out stake holes, pours into cement grout and form cement-soil Section-steel Piles after hanging in shaped steel.Advantage of this invention is that to adapt to northern area comparatively hard and without the soil layer of underground water, and the materials such as shaped steel are recyclable.Shortcoming is that manually digging hole mode discomfort should have the situation of underground water, and is forbidden by increasing provinces and regions due to security reason; Cement-soil stirs on ground, needs special stirring pool and Mixing Machine, and uniformity is also difficult to ensure.
Above-mentioned supporting method all applies green support technology, and except the pluses and minuses of above division, single due to hole forming method, it is very single that common shortcoming is exactly the stratum adapted to, and is difficult to spread and uses.
For this reason, the technical scheme that the present invention proposes, rotary drilling rig (or spiral drilling machine or slewing drilling machine or percussive drill) is adopted to carry out holing and forming mud off, cement-soil mixing pile machine is adopted backfill and cement to be carried out stirring in hole again, form shaped steel cement earth pile after inserting i shaped steel, greatly extend the applicable stratum of recoverable version steel cement earth pile, improve efficiency of construction, reduce construction cost, can significant economic and social benefit be produced.
Summary of the invention
Object of the present invention is just the shortcoming and defect overcoming prior art existence, provides a kind of shaped steel cement earth pile construction method being adapted to multiple stratum.The method construction technology is simple and convenient, reliable in quality, shaped steel used all reclaims to reuse, and has significant low cost and resources conservation advantage, be applicable to stream mould-hard argillic horizon, multiple stratum such as powder soil horizon and sand pebble layer, weathered rock formation etc., be conducive to applying.
Be adapted to the shaped steel cement earth pile construction method on multiple stratum, the steps include:
A, spiral drilling machine, common engineering driller or clean-out machine pore-forming:
Rig is adopted to hole from the earth's surface of foundation soil, rig is adopted to hole from the earth's surface of foundation soil, foundation soil is that stream is moulded--the soil layer of hard plastic, powder soil horizon, when layer of sand or strongly weathered sand-rock, rotary drilling rig (any one) or slewing drilling machine (any one) can be adopted to creep into, foundation soil is plastic--the soil layer of hard plastic, powder soil horizon, when layer of sand or weathered rock formation, can adopt spiral drilling machine (when stake footpath is less, any one) or slewing drilling machine (any one) creep into, foundation soil is cobble, when erratic boulder layer or hard formation, percussive drill (any one) can be adopted to creep into.Creep into projected depth, form boring; For preventing the hole that collapses in boring procedure, can mud off be adopted, drill hole wall is formed the mud skin of one deck protection drill hole wall;
B, filling stirring concrete earth:
The earth material be excavated holing or periphery earth material are inserted in boring, and adopt cement-soil mixing pile machine (any one) to stir on the spot in the borehole, add cement flour (any one) while stirring, foundation soil water content adds clear water time lower simultaneously, forms the soil-cement that stream moulds shape;
C, placement shaped steel:
Get out surface smear vaseline and (meet any one of lubrication, market all has to be purchased) or release agent (meet any one of demoulding requirement, market all has to be purchased) shaped steel, adopt excavator (any one) that shaped steel is transferred to hell, and shaped steel is slowly put into be filled with the boring that stream moulds shape soil-cement, just form shaped steel cement earth pile after cement-soil solidifies in the borehole; Part overlap joint between shaped steel cement earth pile;
D, to be connected with stiffener:
According to requirement of engineering, the stiffeners such as collar tie beam (Guan Liang) can be connected on the stake top of shaped steel cement earth pile, make each row's shaped steel cement earth pile form integer support system.
E, recovery shaped steel:
Pit backfill is to ± 0(technical term, the meaning on earth's surface) after absolute altitude, a protective function for shaped steel cement earth pile completes, i.e. recoverable version steel, to the shaped steel on earth's surface be exposed with being fastenedly connected with short girder steel of slips is housed, then adopt that electric hydaulic is very heavy upwards pushes up short girder steel, after the pine of shaped steel top, directly shaped steel is hung out pile body with excavator.The hole stayed after extracting with cement-soil backfill shaped steel.The quick nondestructive realizing shaped steel reclaims.
Described multiple stratum is argillic horizon, powder soil horizon, sand pebble layer, weathered rock formation etc.
Working mechanism:
Adopt plurality of optional drilling method pore-forming in different foundation soil, greatly extend the range of application of shaped steel cement earth pile, simultaneously by mud off, the boring that the formation short time is stable, is conducive to shaped steel and puts into boring smoothly; Adopt conventional cement-soil mixing pile machine, add cement limit carry out stirring in hole to the limit of banketing in boring, done high work efficiency, ensure that mixing effect, being conducive to forming uniformity is the soil-cement that stream moulds shape preferably; Adopt excavator the shaped steel made to be put into boring, less demanding to machinery, operate also very convenient; Shaped steel is smeared vaseline or release agent, while not effect type steel cement earth pile intensity, make easily to extract during Shaped steel recovery; Adopt electric hydraulic lifting jack to be upwards top-loaded with the short girder steel of slips, shaped steel can be pushed up pine quickly and easily, then directly shaped steel be hung out boring by excavator, the quick nondestructive realizing shaped steel reclaims.
The present invention has following advantages and good effect:
1. work progress and technique simple and convenient, reliable construction quality;
2. shaped steel all reclaims, and has significant cost advantage and resources conservation benefit;
3. be applicable to stream mould the-argillic horizon of hard plastic, powder soil horizon and the multiple stratum such as sand pebble layer, severely-weathered layer, adapt to wide.
Wuhan City's excavation of foundation pit degree of depth is 15-17m, from top to bottom stratum be respectively banket (2-3m is thick), muddy loam (5-7m is thick), in-fine sand layer (6-9m is thick), sand pebble layer (thickness is greater than 3-5m), groundwater table is 3-5m under earth's surface.Shaped steel cement earth pile method+bolt support that design adopts the inventive method to propose.The stake footpath of shaped steel cement earth pile is 900mm, and stake is long is 22.0-23.0m, adopts rotary drilling rig pore-forming; Arrange 3 layers of anchor pole, rock-bolt length is 12-15m.This project example shows, compared with conventional borehole castinplace pile, adopts the shaped steel cement earth pile of rotary drilling rig pore-forming, can save the duration about 1/6, cost-saving about 15-20%.Foundation ditch duration of work, distortion is all less than control criterion, is stability and safety.
Accompanying drawing explanation
Fig. 1 is a kind of floor map being adapted to the shaped steel cement earth pile construction method on multiple stratum.
Fig. 2 is a kind of elevational schematic view being adapted to the shaped steel cement earth pile construction method on multiple stratum.
In figure:
1-earth's surface, 2-shaped steel, 3-vaseline or release agent, 4-cement-soil, 5-mud skin, 6-holes, 7-foundation soil, 8-jack, 9-oil pipe, 10-
slips is housedshort girder steel, 11-suspension hook, 12-wire rope.
Detailed description of the invention
embodiment
1
:
Below in conjunction with Fig. 1, Fig. 2, the present invention is described in further detail:
One, shaped steel cement earth pile:
Known as shown in Figure 1, Figure 2, be placed in the shaped steel cement earth pile of foundation soil 1, be made up of shaped steel 2, cement-soil 4, vaseline or release agent 3, mud skin 5, boring 6;
From bottom to top, boring 6 is connected with mud skin 5, mud skin 5 is connected with cement-soil 4, cement-soil 4 is connected with vaseline or release agent 3, and vaseline or release agent 3 are connected with shaped steel 2, and shaped steel 2 is connected with the short girder steel 10 and suspension hook 11 that slips is housed, the short girder steel 10 that slips is housed is connected with jack 8, jack is connected with automatic oil pump by oil pipe 9, and suspension hook 11 is connected with wire rope 12, and wire rope 12 is connected with the head that digs of excavator.
Two, method:
As Fig. 1, Fig. 2 is known, this method construction is simple, utilization is revolved and to be dug or after common engineering driller or clean-out machine construction drill 6, carry out stirring on the spot in hole with cement-soil mixing pile machine after the earthen backfill of digging out holing, add cement flour or cement paste simultaneously, form cement-soil 4, digging machine is adopted to hang in boring 6 by the suspension hook 11 of welding on wire rope 12 and shaped steel 2 by the shaped steel 2 scribbling vaseline or release agent 3, shaped steel 2 is moulded at stream in the cement-soil 4 of shape to sink voluntarily under gravity, the bottom of shaped steel 2 contacts with foot of hole, basset 1.0m at top, namely cement mixing method is formed.When cement mixing method effect completes, by connecting the short girder steel 10 that slips is housed on the shaped steel 2 exposing earth's surface, jack 8 is utilized upwards to be top-loaded with the short girder steel 10 of slips, shaped steel 2 and cement-soil 4 are got loose, usage mining machine is by the suspension hook on wire rope 12 and shaped steel 2, shaped steel 2 is hung boring 6, namely completes a kind of shaped steel cement earth pile construction being adapted to multiple stratum.
Be adapted to the shaped steel cement earth pile construction method on multiple stratum, the steps include:
1. hole and backfill:
Employing is revolved and is dug or common engineering driller or clean-out machine, construction drill 6 in the multiple foundation soils 7 such as argillic horizon, powder soil horizon, sand pebble layer, weathered rock formation, when foundation soil 7 self-stable ability is poor, adopts mud off during boring, the hole wall of boring 6 is formed mud skin 5.
Boring 6 and mud skin 5 are that the filling of cement-soil 4 and laying smoothly of shaped steel 2 provide precondition.
2. construction shaped steel cement earth pile:
The foundation soil 7 of discharge rig or other earth materials adopt manually or excavator is backfilling in boring 6, the diameter of boring 6 can the size according to requirement of engineering and in conjunction with shaped steel 2 design, then cement-soil mixing pile machine is adopted, stir on the spot in boring 6, add the cement flour by proportion design while stirring, bucket or water pipe can be adopted from the aperture injected clear water of boring 6 when moisture content native in hole is lower, after fully stirring, the earth material of backfill and cement Homogeneous phase mixing in boring 6, form stream and mould shape cement-soil 4 in boring;
Adopt excavator that the shaped steel 2 scribbling vaseline or release agent 3 is hung onto hell, shaped steel 2 is moulded at stream in the cement-soil 4 of shape to sink voluntarily under gravity, the bottom of shaped steel 2 contacts with the bottom of boring 6, shaped steel cement earth pile is formed, part overlap joint between shaped steel cement earth pile after cement-soil 4 solidifies;
The rapid stirring of cement mixing pile machine in hole, define evenly and mould the cement-soil 4 of shape in stream, be conducive to the sinking voluntarily of shaped steel 2 and complete installation before cement-soil 4 solidifies, shaped steel 2 is smeared vaseline or release agent 3, frictional force when being conducive to reducing Shaped steel recovery and between cement-soil and adhesion stress, the lateral stability being formed as the digging processs such as foundation ditch, underground passage, vertical shaft of shaped steel cement earth pile and antiseepage play a significant role.
3. Shaped steel recovery:
When after pit backfill to ± 0 absolute altitude, namely shaped steel 2 can be removed.First on the shaped steel 2 exposing earth's surface, be fastenedly connected the short girder steel 10 that slips is housed, the short girder steel 10 that slips is housed is made to be linked to be entirety with shaped steel 22, bear pulling force shaped steel 2 being pushed up pine, then utilize bottom the jack 8(be arranged on below the short girder steel 10 that slips is housed and can billet be set, to provide sufficient counter-force) and be connected with automatic oil pump by oil pipe 9, when under the effect at oil pressure of the piston of jack 8 up lifting time, shaped steel 2 is upwards pushed up from cement-soil 4, after shaped steel 2 and cement-soil 4 get loose, usage mining machine is by the suspension hook 11 on wire rope 12 and shaped steel 2, shaped steel 2 is hung boring 6, finally earth material is backfilled the hole that rear formation removed by steel steel 2 by artificial means.
Adopt jack 8 and the short girder steel 10 of slips is housed, shaped steel 2 and cement-soil 4 can be made to get loose, be conducive to excavator and hung smoothly from cement-soil 4 by shaped steel 2, reach the object of recovery, the hole of rear formation removed by backfill shaped steel 2, to ensure the safety in place.
Described the method is applicable to any one in argillic horizon, powder soil horizon, sand pebble layer, weathered rock formation.
Wuhan City's excavation of foundation pit degree of depth is 16m, from top to bottom stratum be respectively banket (3m is thick), muddy loam (7m is thick), in-fine sand layer (8m is thick), sand pebble layer (thickness is greater than 6m), groundwater table is 4m under earth's surface.Shaped steel cement earth pile method+bolt support that design adopts the inventive method to propose.The stake footpath of shaped steel cement earth pile is 900mm, and stake is long is 22.0-23.0m, adopts rotary drilling rig pore-forming; Arrange 3 layers of anchor pole, rock-bolt length is 12-15m.This project example shows, compared with conventional borehole castinplace pile, adopts the shaped steel cement earth pile of rotary drilling rig pore-forming, can save the duration about 1/6, cost-saving about 15-20%.Foundation ditch duration of work, distortion is all less than control criterion, is stability and safety.
Claims (1)
1. be adapted to the shaped steel cement earth pile construction method on multiple stratum, the steps include:
A, rotary drilling rig or spiral drilling machine or slewing drilling machine or percussive drill pore-forming: adopt rig to hole from the earth's surface of foundation soil, foundation soil is that stream is moulded--when the soil layer of hard plastic, powder soil horizon, layer of sand or strongly weathered sand-rock, rotary drilling rig or slewing drilling machine is adopted to creep into, foundation soil is plastic--hard argillic horizon, powder soil horizon, layer of sand or weathered rock formation time, spiral drilling machine or slewing drilling machine is adopted to creep into, when foundation soil is cobble, erratic boulder layer or hard formation, employing percussive drill creeps into, creep into projected depth, form boring; For preventing the hole that collapses in boring procedure, adopt mud off, drill hole wall is formed the mud skin of one deck protection drill hole wall;
B, stirring concrete earth: the earth material dig out boring row or periphery earth material are inserted in boring, cement-soil mixing pile machine is adopted to stir on the spot in the borehole, add cement flour while stirring, when foundation soil water content is lower, add clear water simultaneously, in boring, form the soil-cement that stream moulds shape;
C, placement shaped steel: the shaped steel getting out surface smear vaseline or release agent, adopt excavator that shaped steel is transferred to hell, put into by shaped steel and be filled with the boring that stream moulds shape soil-cement, just form shaped steel cement earth pile after cement-soil solidifies in the borehole; Part overlap joint between shaped steel cement earth pile;
D, to be connected with stiffener: be connected collar tie beam stiffener on the stake top of shaped steel cement earth pile, to make each row's shaped steel cement earth pile form integer support system;
E, recovery shaped steel: after pit backfill to ± 0 absolute altitude, a protective function for shaped steel cement earth pile completes, reclaim shaped steel, the shaped steel exposing earth's surface is fastenedly connected with the short girder steel that slips is housed, then adopt that electric hydaulic is very heavy upwards to be pushed up short girder steel shaped steel and cement-soil are got loose, directly shaped steel is hung out pile body with excavator again, the cavity that rear cement-soil backfill shaped steel stays after extracting.
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Cited By (7)
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| CN106567382A (en) * | 2016-10-25 | 2017-04-19 | 东通岩土科技（杭州）有限公司 | Foundation pit curtain construction method in gravel layer |
| CN107023010A (en) * | 2017-06-02 | 2017-08-08 | 郑州大学 | A kind of I-steel extracting apparatus of cement mixing wall |
| CN107489158A (en) * | 2017-09-23 | 2017-12-19 | 北京建材地质工程有限公司 | A kind of spiral-digging pore stirs the construction method of water spray soil occlusion curtain pile |
| CN109577341A (en) * | 2018-11-08 | 2019-04-05 | 中交二航局成都城市建设工程有限公司 | The anti-collapse construction method of rich water ovum erratic boulder soil body burning into sand stratum foundation pit major diameter fender post |
| CN110318392A (en) * | 2019-07-03 | 2019-10-11 | 成都四海岩土工程有限公司 | A kind of major diameter cement earth pile method of construction |
| CN111877316A (en) * | 2020-07-17 | 2020-11-03 | 广西北部湾投资集团有限公司 | Pile bottom leveling and filling strength forming method for prefabricated pipe pile |
| CN115059070A (en) * | 2022-05-31 | 2022-09-16 | 北京建材地质工程有限公司 | Construction method of collapse-free stratum foundation pit supporting pile based on solid waste utilization |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106567382A (en) * | 2016-10-25 | 2017-04-19 | 东通岩土科技（杭州）有限公司 | Foundation pit curtain construction method in gravel layer |
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| CN111877316A (en) * | 2020-07-17 | 2020-11-03 | 广西北部湾投资集团有限公司 | Pile bottom leveling and filling strength forming method for prefabricated pipe pile |
| CN115059070A (en) * | 2022-05-31 | 2022-09-16 | 北京建材地质工程有限公司 | Construction method of collapse-free stratum foundation pit supporting pile based on solid waste utilization |
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Application publication date: 20150805 |