CN105780763A - Construction method of medium-hole vibrating casing wall protection type long spiral cast-in-situ bored pile - Google Patents
Construction method of medium-hole vibrating casing wall protection type long spiral cast-in-situ bored pile Download PDFInfo
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- CN105780763A CN105780763A CN201510895397.XA CN201510895397A CN105780763A CN 105780763 A CN105780763 A CN 105780763A CN 201510895397 A CN201510895397 A CN 201510895397A CN 105780763 A CN105780763 A CN 105780763A
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
- E02D5/22—Piles
- E02D5/34—Concrete or concrete-like piles cast in position ; Apparatus for making same
- E02D5/38—Concrete or concrete-like piles cast in position ; Apparatus for making same making by use of mould-pipes or other moulds
- E02D5/385—Concrete or concrete-like piles cast in position ; Apparatus for making same making by use of mould-pipes or other moulds with removal of the outer mould-pipes
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D15/00—Handling building or like materials for hydraulic engineering or foundations
- E02D15/02—Handling of bulk concrete specially for foundation or hydraulic engineering purposes
- E02D15/04—Placing concrete in mould-pipes, pile tubes, bore-holes or narrow shafts
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Abstract
The invention relates to a construction method of a medium-hole vibrating casing wall protection type long spiral cast-in-situ bored pile. The construction method comprises the steps that surveying and setting-out are conducted for determining a pile position, and a long spiral drilling machine is made to be aligned to the pile position; the long spiral drilling machine is started, and a spiral drill rod and a drill bit are driven to conduct rotary drilling vertically downwards; a medium-hole vibrating hammer is started at the same time to drive a pile casing to follow up vertically downwards to a preset pile end depth; the spiral drill rod idles, so that residue soil at the bottom is discharged; the drill rod is lifted, concrete is poured into a pile hole while the spiral drill rod is lifted, and concrete pouring is stopped after the spiral drill rod is lifted to a preset height; after concrete pouring is completed, the pile casing is left in the pile, the long spiral drilling machine is removed out of the pile hole, and a steel bar insertion device and a steel reinforcement cage are inserted into the poured concrete together by means of a crane while being vibrated; and after the steel reinforcement cage is inserted to a preset depth, the steel rib insertion device is pulled out, the pile casing is completely pulled out, and the cast-in-situ pile is solidified and formed. The construction method of the medium-hole vibrating casing wall protection type long spiral cast-in-situ bored pile has the advantages that the quality of the cast-in-site pile is high, construction is safe, the cost is low, the speed is high, environmental friendliness is achieved, and results are practical.
Description
Technical field
The present invention relates to building foundation engineering technical field, particularly relate to the construction method of a kind of mesopore vibration sleeve pipe retaining wall long auger guncreting pile.
Background technology
Bored concrete pile has when construction friction, without soil compaction, noise is little, be suitable in advantages such as City Building City Regions uses, obtains relatively broad application in architectural engineering.Difference according to pore-forming technique, bored concrete pile can be divided into cast-in-situ bored pile, driven cast-in-place pile, manually digging hole filling pile etc..
Cast-in-situ bored pile refers to utilize drilling machine to get out stake holes, and casting concrete (or first hanging steel reinforcement cage in hole) and stake that total replacement becomes in hole.In drilling process, whether adopt mud off construction technology and opinion according to drilling machine, be divided into again mud off pore-forming and two kinds of methods of dry operation pore-forming.Wherein, holing with slurry wall protection bored concrete pile is to utilize water hammer drill pore-forming, in order to avoid not collapse hole in boring, first mud off must be carried out, adopt water circulation that earth is become mud and carry out displacement pore-forming, mud balance is crucial, and by hole flushing after pore-forming, then descending reinforcing cage, downcomer are irrigated concrete.Although this kind of pile-formation process need not too much consider the excavation situation of foundation ditch and adapt to the advantage of building of various geological conditions and different scales, but the congenital existing problems of holing with slurry wall protection piling quality, such as stake end easily produces sediment, the outside of stake forms mud layer, and the raising aspect of the end bearing capacity after pile and sidewall resistance is greatly affected.Secondly, a large amount of mud influence site operations of slurry drilled pile output, it is necessary to outward transport discharge, transport to any one place and all there is secondary pollution, and do not do for a long time, are difficult to process.Again, slurry drilled pile needs to expend the substantial amounts of time, for instance, stake footpath 600mm, the long 25m of stake one day 24 hours pile quantity of holing with slurry wall protection bored concrete pile be 4-5 pile, thus the Financial cost caused is very high, and the potential fatigue strength adding workman.Comparatively speaking, wide variety of " long auger guncreting pile (inserts steel reinforcement cage) afterwards " construction technology in the dry current industry of operation pore-creating filling pile, do not need mud off, the problem fundamentally solving mud contamination, and pile-forming speed is compared slurry drilled pile and is improved 4-5 times, about 24 hours pile 16-20 roots, greatly reducing Financial cost, this pile-forming speed also substantially reduces the duration.Secondly, this kind of technique, not by the restriction of level of ground water, low noise, vibrates little advantage.But, the excavation condition of foundation ditch is required very high by long auger guncreting pile construction technology, in general, if this kind of construction technology is constructed than shallower region at rich groundwater buried depth, it should first carry out excavation supporting precipitation, be excavated to designed elevation.If excavation of foundation pit not in time or is not excavated to designed elevation, this kind of technique can waste substantial amounts of concrete, thus increasing unnecessary cost of investment；If precipitation is not in time, drilling equipment can be caused to fall into machine, increase the security risk of construction, but long-term precipitation increases again the cost of construction unit.
Driven cast-in-place pile refers to utilize hammering pore-forming piling method or the two kinds of method constructions of vibration sinking tube piling method, steel thimble with flapper-type pile top or precast reinforced concrete pile boots is sunk in soil, then limit casting concrete (or first putting into steel reinforcement cage in pipe), side hammer hits or vibrates the stake of limit tube drawing.This construction method is applicable in the situation construction having silt, clay, muck soil.With general cast-in-situ bored pile ratio, driven cast-in-place pile avoids the blocked up pile body caused of general Pile end sediment and sinks, and the problem that vertical bearing capacity can not meet design requirement effectively improves pile body side friction power by mud influence simultaneously, it addition, this technique also more saves material.But traditional immersed tube bored pile driving construction is affected in many ways, geological conditions, mechanical own defect etc., construction quality is wayward, the too fast stake shortea that easily causes of tube drawing, and owing to being Squeezing Soil Pile, the stake poured into a mould in advance is vulnerable to soil compaction effect and produces inclined fracture and even misplace.Owing to, in work progress, hammering can produce loud noise, vibration can affect Adjacent Buildings, therefore be less compliant in urban district and use, and more existing cities prohibit the use of in urban district.
Manually digging hole filling pile refers to that stake holes adopts hand digging method to carry out pore-forming, then lays steel reinforcement cage, the stake of casting concrete.Manual digging pile construction is convenient, do not need heavy mechanical equipment, and caisson is stronger than concrete driven pile shock resistance, and cost is saved, thus being used widely in highway, civil buildings.But caisson underground work condition is poor, bad environments, labor intensity big, and safety and quality are particularly important.Secondly, stake holes conscientiously to study geologic information before excavating, and analyzes the geological condition quicksand to being likely to occur, the stream situation such as mud and harmful gas, should formulate safety measure targetedly.Again, artificial digging pile is generally relatively large in diameter, the thinnest also at more than 800mm, so the pile foundation for diameter general in industry is inapplicable.It addition, because this construction method is completely manually cut the earth in underground work, there is collapse hole danger, this construction technology security incident is frequent, and construction is expressly forbidden in a lot of cities.
In conjunction with cast-in-place pile construction method commonly used in above-described industry, it can be seen that slurry drilled pile and manually digging hole filling pile is consuming time, effort, uneconomical, but less demanding for excavation of foundation pit；By contrast, long auger guncreting pile and driven cast-in-place pile adopt plant equipment pore-forming, save time, laborsaving, efficient, save cost, but its condition being suitable for completely is be excavated to the foundation ditch of designed elevation and precipitation, add the excavation condition of foundation ditch undoubtedly, also bring the potential safety hazard filling stake and environmental pollution simultaneously.
Summary of the invention
Present invention aim to overcome that the construction method of the deficiencies in the prior art and the mesopore provided vibration sleeve pipe retaining wall long auger guncreting pile, the present invention has the advantages such as filling quality of pile height, construction safety, with low cost, speed fast, environmental protection, fructufy use.
The object of the present invention is achieved like this: the construction method of a kind of mesopore vibration sleeve pipe retaining wall long auger guncreting pile, comprises the steps:
Step 1), surveying setting-out fixed pile, long-spiral drilling machine connects and drives auger stem and drill bit, mesopore vibration hammer connects vibration casing, and long-spiral drilling machine is arranged on above mesopore vibration hammer, and described long-spiral drilling machine, auger stem, mesopore vibration hammer and casing are axially coincident；Mobile also leveling long-spiral drilling machine, makes long-spiral drilling machine align piles position；
Step 2), behind long-spiral drilling machine align piles position, start long-spiral drilling machine and drive auger stem and drill bit rotary drilling vertically downward；While long-spiral drilling machine is drilled down into, starting mesopore vibration hammer and drive casing to vibrate follow-up vertically downward, long-spiral drilling machine, mesopore vibration hammer and casing are axially coincident, and follow-up is the predetermined stake end degree of depth extremely；
Step 3), being drilled into predetermined design hole depth, bottom dregs is discharged in auger stem idle running；
Step 4), lifting drilling rod, be fed into concrete by auger stem to stake holes is intrinsic pressure, while carry auger stem limit guncreting, carry auger stem to predetermined altitude, stop concrete perfusion；
Step 5), irrigated after, mesopore vibration hammer disengages hydraulically operated fixture and connects, casing is made to stay in stake, long-spiral drilling machine is removed stake holes position, use cleaner cleaning drill bit, clear up dregs around stake position with excavator, with crane, the joint bar device of small vibration hammer linking is inserted in the concrete irrigated together with steel reinforcement cage in the lump limit vibration limit；After steel reinforcement cage is inserted to desired depth, vibration limit, joint bar device limit is extracted completely；
Step 6), long-spiral drilling machine moving to stake position again, start hydraulically operated fixture, clamp casing, casing is extracted by limit vibration limit completely, bored concrete pile coagulation forming.
Described long-spiral drilling machine is provided with cleaner, and cleaner includes cleaning rod and the cleaning brush being arranged on cleaning rod, and one end of cleaning rod is arranged on long-spiral drilling machine, and cleaning rod can horizontal hunting 0 ° 180 °.
When in described step 4, limit carries auger stem limit guncreting, the height of drill bit is consistently lower than the height of penetration concrete.
Described vibration is exempts from resonance.
The frequency of vibration of described mesopore vibration hammer is 800r/min ~ 1200r/min, and exciting force is 600KN ~ 800KN；
The frequency of vibration of described small vibration hammer is 700r/min ~ 1000r/min, and exciting force is 100KN ~ 200KN；
The present invention has following good effect:
1, long-spiral drilling machine is adopted to drive drilling rod, adopting mesopore vibration hammer to drive casing construction, first, boring and retaining wall carry out simultaneously simultaneously, simplify the construction of holing with slurry wall protection bored concrete pile, save the secondary pollution of time, labour and transport mud cost and mud；
2, adopt long screw drill rod creep into trocar sheath panelling construction, it is ensured that the construction quality of bored concrete pile, it is ensured that will not expanding, undergauge, broken pile, improve rate of penetration, it is achieved high efficiency pore-forming；
3, the threaded drillpipe of rig is identical with casing longitudinal center line, and is drilled down into simultaneously, therefore borehole shape is regular, and hole quality can be protected；On the other hand, casing follows up along with drilling rod, retaining wall effect can be played, and ensure that under the non-excavation condition of foundation ditch, empty stake part also can utilize casing to carry out retaining wall, so avoiding the collapse hole accident of tradition bored concrete pile, and instead of mud, save transport mud expense cost, it is to avoid environmental pollution；
4, casing is pulled out on vibration limit, mesopore vibration hammer limit, and the process of vibration adds concrete degree of compaction, and therefore, the pile quality of bored concrete pile is more guaranteed, and all strengthened raising to the vertical bearing capacity of stake and horizontal shear strength.
Accompanying drawing explanation
Fig. 1 is the equipment connection diagram of the construction method of mesopore vibration sleeve pipe retaining wall long auger guncreting pile.
Fig. 2 is the boring schematic diagram of the construction method of mesopore vibration sleeve pipe retaining wall long auger guncreting pile.
Fig. 3 is the filling mechanism schematic diagram of the construction method of mesopore vibration sleeve pipe retaining wall long auger guncreting pile.
Fig. 4 is the slotting basket structure schematic diagram of the construction method of mesopore vibration sleeve pipe retaining wall long auger guncreting pile.
Fig. 5 is the plug muscle device structural scheme of mechanism of the construction method of mesopore vibration sleeve pipe retaining wall long auger guncreting pile.
Fig. 6 be mesopore vibration sleeve pipe retaining wall long auger guncreting pile construction method pull out casing structural scheme of mechanism.
Fig. 7 is the pile structural scheme of mechanism of the construction method of mesopore vibration sleeve pipe retaining wall long auger guncreting pile.
Detailed description of the invention
Embodiment 1, as shown in Figure 1, Figure 2, shown in Fig. 3, Fig. 4, Fig. 5, Fig. 6, Fig. 7, the mesopore vibration required main mechanical of sleeve pipe retaining wall long auger guncreting pile construction and auxiliary include: long-spiral drilling machine 1, mesopore vibration hammer 2, casing 3, joint bar device 8, small vibration hammer 7；Accessory machinery includes: crane 10, concrete pump 4, excavator.The installation of plant equipment comprises with being connected: long-spiral drilling machine 1 connects and drive auger stem 5 and drill bit 6；Being provided with cleaner 12 on long-spiral drilling machine, mesopore vibration hammer 2 clamps casing 3 with hydraulically operated fixture 13, and described auger stem 5, drill bit 6, mesopore vibration hammer 2 and casing 3 are axially coincident；Small vibration hammer 7 connects and drives joint bar device 8；Concrete pump 4 connects long-spiral drilling machine 1, is transported in auger stem by concrete 11, and crane 10 hangs steel reinforcement cage 9.
Mesopore vibration sleeve pipe retaining wall long auger guncreting pile construction technology is: under surveying setting-out fixed pile moving long twist bit align piles position, leveling, drilled as holes startup mesopore vibration hammer cylinder-wall protecting is drilled into the clear hole of idle running at the bottom of predetermined stake and carries brill, start concrete mixer, by long screw auger center drill rod to intrinsic pressure concrete perfusion, Ti Zuan limit, limit pressure concrete adopts specialty joint bar device insertion steel reinforcement cage high to predetermined cage top mark to irrigating predetermined absolute altitude, extracts the vibration of special joint bar device and extracts casing pile.
1), surveying setting-out fixed pile, long-spiral drilling machine connects and drives auger stem and drill bit, mesopore vibration hammer hydraulically operated fixture to clamp casing, and described long-spiral drilling machine, auger stem, mesopore vibration hammer and casing are axially coincident；Mobile also leveling long-spiral drilling machine, makes long-spiral drilling machine align piles position；
2), behind long-spiral drilling machine align piles position, start long-spiral drilling machine and drive auger stem and drill bit rotary drilling vertically downward；While long-spiral drilling machine is drilled down into, starting mesopore vibration hammer drives casing to vibrate follow-up vertically downward, and long-spiral drilling machine, mesopore vibration hammer and casing are axially coincident, and follow-up is the predetermined stake end degree of depth extremely, the frequency of vibration of mesopore vibration hammer is 1000r/min, and exciting force is 786KN；
3), being drilled into predetermined design hole depth, bottom dregs is discharged in auger stem idle running；
4), drilling rod is promoted, by auger stem to the intrinsic pressure concrete that is fed into of stake holes, guncreting while lifting auger stem, need to ensure the height that the height of drill bit is consistently lower than penetration concrete in perfusion, carry auger stem to predetermined altitude, stop concrete perfusion；
5) after, having irrigated, disengagement hydraulically operated fixture connects, and makes casing stay in stake, long-spiral drilling machine removes stake holes position, long-spiral drilling machine is provided with cleaner, when auger stem works, cleaner is moved to side, it is to avoid touch auger stem, after completing work, continue to drive auger stem to rotate, by cleaner horizontal hunting to the position with bit contact, remove the dregs on drill bit by the power cleaner rotated, reduce labour force.Then clearing up dregs around stake position with excavator, sling small vibration hammer with crane, small vibration hammer drives joint bar device to insert in the concrete irrigated together with steel reinforcement cage in the lump limit vibration limit；Steel reinforcement cage extracts joint bar device after arriving precalculated position, and the frequency of vibration of small vibration hammer is 950r/min, and exciting force is 140KN；
6), by long-spiral drilling machine again moving to stake position, start hydraulically operated fixture, connect casing, casing is extracted by limit vibration limit completely, bored concrete pile coagulation forming.
Learn with practice in sum, adopt long-spiral drilling machine unit head to drive drilling rod, adopt mesopore vibration hammer to drive casing construction simultaneously, first, boring and retaining wall carry out simultaneously, simplify the construction of holing with slurry wall protection bored concrete pile, save time, labour and transport mud cost；Secondly, adopt long screw drill rod to creep into trocar sheath panelling construction, it is ensured that the construction quality of bored concrete pile, it is ensured that will not expanding, undergauge, broken pile, improve rate of penetration, it is achieved high efficiency pore-forming；Again, the threaded drillpipe of rig is identical with casing longitudinal center line, and is drilled down into simultaneously, therefore borehole shape is regular, and hole quality can be protected；On the other hand, casing follows up along with drilling rod, retaining wall effect can be played, and ensure that under the non-excavation condition of foundation ditch, empty stake part also can utilize casing to carry out retaining wall, so avoiding the collapse hole accident of tradition bored concrete pile, and instead of mud, save transport mud expense cost, it is to avoid environmental pollution；Finally, casing is pulled out on vibration limit, mesopore vibration hammer limit, and the process of vibration adds concrete degree of compaction, and therefore, the pile quality of bored concrete pile is more guaranteed, and all strengthened raising to the vertical bearing capacity of stake and horizontal shear strength.The quality of pile of the present invention is more guaranteed, it is safer to construct, cost is more economical, speed faster, more environmentally-friendly, result is more practical and simplify tradition bored concrete pile construction procedure.
Examples detailed above is only the preferred embodiment of the present invention; not in order to limit the present invention; for a person skilled in the art; the present invention can have various modifications and variations; all within the spirit and principles in the present invention; any amendment of being made, equivalent replacement, improvement etc., should be included within protection scope of the present invention.
Claims (6)
1. the construction method of mesopore vibration sleeve pipe retaining wall long auger guncreting pile, comprises the steps:
Step 1), surveying setting-out fixed pile, long-spiral drilling machine connects and drives auger stem and drill bit, mesopore vibration hammer connects vibration casing, and long-spiral drilling machine is arranged on above mesopore vibration hammer, and described long-spiral drilling machine, auger stem, mesopore vibration hammer and casing are axially coincident；Mobile also leveling long-spiral drilling machine, makes long-spiral drilling machine align piles position；
Step 2), behind long-spiral drilling machine align piles position, start long-spiral drilling machine and drive auger stem and drill bit rotary drilling vertically downward；While long-spiral drilling machine is drilled down into, starting mesopore vibration hammer and drive casing to vibrate follow-up vertically downward, long-spiral drilling machine, mesopore vibration hammer and casing are axially coincident, and follow-up is the predetermined stake end degree of depth extremely；
Step 3), being drilled into predetermined design hole depth, bottom dregs is discharged in auger stem idle running；
Step 4), lifting drilling rod, be fed into concrete by auger stem to stake holes is intrinsic pressure, while carry auger stem limit guncreting, carry auger stem to predetermined altitude, stop concrete perfusion；
Step 5), irrigated after, mesopore vibration hammer disengages hydraulically operated fixture and connects, casing is made to stay in stake, long-spiral drilling machine is removed stake holes position, use cleaner cleaning drill bit, clear up dregs around stake position with excavator, with crane, the joint bar device of small vibration hammer linking is inserted in the concrete irrigated together with steel reinforcement cage in the lump limit vibration limit；After steel reinforcement cage is inserted to desired depth, vibration limit, joint bar device limit is extracted completely；
Step 6), long-spiral drilling machine moving to stake position again, start hydraulically operated fixture, clamp casing, casing is extracted by limit vibration limit completely, bored concrete pile coagulation forming.
2. the construction method of mesopore according to claim 1 vibration sleeve pipe retaining wall long auger guncreting pile, it is characterized in that: described long-spiral drilling machine is provided with cleaner, cleaner includes cleaning rod and the cleaning brush being arranged on cleaning rod, one end of cleaning rod is arranged on long-spiral drilling machine, and cleaning rod can horizontal hunting 0 ° 180 °.
3. the construction method of mesopore according to claim 1 vibration sleeve pipe retaining wall long auger guncreting pile, it is characterised in that: when in described step 4, limit carries auger stem limit guncreting, the height of drill bit is consistently lower than the height of penetration concrete.
4. the construction method of mesopore according to claim 1 vibration sleeve pipe retaining wall long auger guncreting pile, it is characterised in that: described vibration is exempts from resonance.
5. the construction method of mesopore according to claim 1 vibration sleeve pipe retaining wall long auger guncreting pile, it is characterised in that: the frequency of vibration of described mesopore vibration hammer is 800r/min ~ 1200r/min, and exciting force is 600KN ~ 800KN.
6. the construction method of mesopore according to claim 1 vibration sleeve pipe retaining wall long auger guncreting pile, it is characterised in that: the frequency of vibration of described small vibration hammer is 700r/min ~ 1000r/min, and exciting force is 100KN ~ 200KN.
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Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106351575A (en) * | 2016-11-07 | 2017-01-25 | 赵宽学 | Hole-protecting and pile-drilling method |
| CN106930274A (en) * | 2017-03-28 | 2017-07-07 | 东南大学 | Construction method of full-sleeve rotary bored pile with fixed reinforcement cage position |
| CN108547301A (en) * | 2018-04-13 | 2018-09-18 | 云南建投基础工程有限责任公司 | A kind of long auger guncreting pile construction method having negative dead band |
| CN110144873A (en) * | 2019-05-31 | 2019-08-20 | 中国二十二冶集团有限公司 | Mud geology relief hole fills sand device and fills sand method |
| CN111005374A (en) * | 2019-11-27 | 2020-04-14 | 亨通海洋工程有限公司 | Construction process for replacing slurry retaining wall |
| CN111021948A (en) * | 2019-12-30 | 2020-04-17 | 深圳市盛业地下工程有限公司 | Pile foundation combination equipment for rapid pore-forming of complex geology |
| CN111101865A (en) * | 2019-12-30 | 2020-05-05 | 深圳市盛业地下工程有限公司 | High efficiency drilling equipment |
| CN111335810A (en) * | 2019-09-09 | 2020-06-26 | 江西基业科技有限公司 | A construction method for continuous pile formation |
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| CN112030961A (en) * | 2020-08-07 | 2020-12-04 | 湖北中南岩土工程有限公司 | Vibration pipe following construction process for long spiral cast-in-place pile |
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| CN113187381A (en) * | 2021-03-19 | 2021-07-30 | 中基发展建设工程有限责任公司 | High-water-length spiral well forming construction process |
| CN115387328A (en) * | 2022-07-26 | 2022-11-25 | 河南黄河河务局工程建设中心 | Construction method of beach area cast-in-place pile based on overlong spiral drilling machine |
| CN115613564A (en) * | 2022-10-09 | 2023-01-17 | 中国水利水电第七工程局有限公司 | Anti-floating anchor rod construction method |
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Cited By (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106351575A (en) * | 2016-11-07 | 2017-01-25 | 赵宽学 | Hole-protecting and pile-drilling method |
| CN106930274A (en) * | 2017-03-28 | 2017-07-07 | 东南大学 | Construction method of full-sleeve rotary bored pile with fixed reinforcement cage position |
| CN106930274B (en) * | 2017-03-28 | 2019-02-12 | 东南大学 | A construction method of a full-sleeve rotary bored cast-in-place pile with a fixed steel cage position |
| CN108547301A (en) * | 2018-04-13 | 2018-09-18 | 云南建投基础工程有限责任公司 | A kind of long auger guncreting pile construction method having negative dead band |
| CN110144873A (en) * | 2019-05-31 | 2019-08-20 | 中国二十二冶集团有限公司 | Mud geology relief hole fills sand device and fills sand method |
| CN111335810A (en) * | 2019-09-09 | 2020-06-26 | 江西基业科技有限公司 | A construction method for continuous pile formation |
| CN111005374A (en) * | 2019-11-27 | 2020-04-14 | 亨通海洋工程有限公司 | Construction process for replacing slurry retaining wall |
| CN111021948A (en) * | 2019-12-30 | 2020-04-17 | 深圳市盛业地下工程有限公司 | Pile foundation combination equipment for rapid pore-forming of complex geology |
| CN111101865A (en) * | 2019-12-30 | 2020-05-05 | 深圳市盛业地下工程有限公司 | High efficiency drilling equipment |
| CN111335332A (en) * | 2020-04-07 | 2020-06-26 | 中铁七局集团郑州工程有限公司 | Long spiral drilling pressure-grouting pile construction pile casing and construction process |
| CN112030961A (en) * | 2020-08-07 | 2020-12-04 | 湖北中南岩土工程有限公司 | Vibration pipe following construction process for long spiral cast-in-place pile |
| CN112030961B (en) * | 2020-08-07 | 2021-11-02 | 湖北中南岩土工程有限公司 | Vibration pipe following construction process for long spiral cast-in-place pile |
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| CN113187381A (en) * | 2021-03-19 | 2021-07-30 | 中基发展建设工程有限责任公司 | High-water-length spiral well forming construction process |
| CN113187381B (en) * | 2021-03-19 | 2023-11-21 | 中基发展建设工程有限责任公司 | High-water-level long-spiral well formation construction process |
| CN115387328A (en) * | 2022-07-26 | 2022-11-25 | 河南黄河河务局工程建设中心 | Construction method of beach area cast-in-place pile based on overlong spiral drilling machine |
| CN115387328B (en) * | 2022-07-26 | 2024-02-13 | 河南黄河河务局工程建设中心 | Beach cast-in-place pile construction method based on ultra-long spiral drilling machine |
| CN115613564A (en) * | 2022-10-09 | 2023-01-17 | 中国水利水电第七工程局有限公司 | Anti-floating anchor rod construction method |
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