CN101922149A - Construction method and construction equipment for one-step molded hole digging pile protecting wall - Google Patents
Construction method and construction equipment for one-step molded hole digging pile protecting wall Download PDFInfo
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- CN101922149A CN101922149A CN 201010257667 CN201010257667A CN101922149A CN 101922149 A CN101922149 A CN 101922149A CN 201010257667 CN201010257667 CN 201010257667 CN 201010257667 A CN201010257667 A CN 201010257667A CN 101922149 A CN101922149 A CN 101922149A
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Abstract
The invention discloses a construction method and construction equipment for a one-step molded hole digging pile protecting wall. The construction method comprises the following steps of: clockwise drilling holes with a drill bit with a baffle plate and guniting blades; drilling holes by the drill bit through counterclockwise rotation when the drill bit is drilled into a required depth; and after the protecting wall is primarily solidified, cleaning the holes. The equipment comprises a guniting pipe, the guniting blades, the baffle plate, rotary blades, the drill bit with the baffle plate and the guniting blades, a motor A, a mortar pump, a mortar collection tank, a lead screw or an oil pressure ejector rod, a guniting hole, a connecting bearing, a slide way, a transmission rod or oil pressure rod and a motor B or an oil pressure device. The construction method has the advantages of high efficiency, high speed, safety and reliability of mechanical construction. The protecting wall with high integrality and uniform thickness can be formed at one time; the wall is seamless, has high sealing property, can effectively control underground water, sludge, shifting sand and other polluting substances and prevent the contact with a building pile foundation after being consolidated; and the protecting wall can effectively prevent the corrosion to the pile foundation by corrosive water quality, increase the strength of the pile foundation, improve the bearing capacity and prolong the service life.
Description
Technical field
What the present invention relates to is the job practices and the equipment thereof of one-step molded hole digging pile protecting wall, belongs to technical field of building construction.
Background technology
Along with development and national economy, all kinds of civilian and industrial construction move towards high stratification day by day, and digging hole filling pile obtains the approval of many designing units, Construction unit with its distinctive large bearing capacity advantage.Really be a kind of economic and practical base form.
Be subjected to the influence of factors such as building construction types, load distribution situation, geological conditions, construction equipment and execution conditions, the selection of stake type is very limited, especially running into when comprising the higher unfavorable geological condition of mud or groundwater table such as mucky soil or drift sand formation, according to all kinds of soil compaction stakes or the non-soil compaction pile-formation process of doing at present wet method, common have pile tube, preformed pile, bored pile, a hole digging pile etc.
The advantage of pile tube, the stake of tubular type side, preformed pile is batch production production, construction speed piece.Defective is: the soil compaction pile capacity is low, the stake end can not be squeezed into hard soil layer and lithosphere, the hammering noise is big during injection, easily swell on ground around the stake, cause stake come-up in place adjacent, the difficult control of pile extension welding quality, antidetonation, resistance to plucking, resistance to corrosion are poor, occur broken pile easily, be only applicable to low multilayer of bearing capacity or little high level.
The advantage of bored pile is the bearing capacity height, is applicable to road, bridge, highrise building.Defective is that the underwater concrete pouring quality is wayward, and broken pile appears in chance mud, drift sand easily, necking down, the phenomenon of revealing muscle and pressing from both sides mud; Sediment of the hole bottom is wayward, bearing capacity changes greatly, the mud contamination environment, long in time limit, cost is high.
Digging hole filling pile tool hole quality height, the characteristics that the stake footpath is big, bearing capacity of single pile is high, its performance is better than pile tube, preformed pile and bored pile, tube-sinking cast-in-situ pile, and the core of decision hole digging pile quality and efficiency of construction is the job practices and the equipment thereof of its retaining wall.Protection wall of bored pile generally adopts merogenesis to build or prefabricated mode at present, retaining wall is not unified integral body, but merogenesis combines from top to bottom, meet the weak geology of the higher or undercurrent of groundwater table, the problems such as fracture of hole, retaining wall or dislocation that often occur collapsing, thus progress, quality and the construction safety of pile foundation construction influenced.
Summary of the invention
Purpose of the present invention is intended to overcome the existing above-mentioned deficiency of existing pile foundation construction process under the unfavorable geological condition, the job practices and the equipment thereof of one-step molded hole digging pile protecting wall are proposed, advantage such as it has construction safety, work efficiency height, quality height, construction technology is easy to operate, construction cost is easy to control.Widen under unfavorable geological condition, the stake type design alternative of all kinds of construction works realizes efficient, high-quality and personal security construction.
Technical solution of the present invention: the one-step molded hole digging pile protecting wall job practices is characterized in that this method comprises following construction sequence:
One, the drill bit of band baffle and whitewashing blade is by boring clockwise, and by shotcrete pipe, water spray reduces the frictional force of soil layer with the dilution soil layer from the whitewashing blade of packing up, and is convenient to the drill bit trouble-free operation;
Two, when bit drills when the needed degree of depth, drill bit changes into and being rotated counterclockwise, open whitewashing blade by reverse thrust, rack or the oil compression rod mode of soil layer this moment, the whitewashing blade carries out rotary-cut to the soil layer in the baffle outside, the whitewashing blade that is connected with shotcrete pipe simultaneously stops water spray, change water spray mud, mortar or other curing compound, in the time of whitewashing blade water spray mud, mortar or other curing compound drill bit is evenly promoted the face that portals by being rotated counterclockwise to make progress, after fixed, between baffle and soil layer, form the airtight firm retaining wall of 100-300mm thickness;
Three, treat that retaining wall solidifies after, carry out machinery and revolve and dig hole operation clearly.
The construction equipment of one-step molded hole digging pile protecting wall, it is characterized in that comprising shotcrete pipe, the whitewashing blade, baffle, rotating vane, the drill bit of band baffle and whitewashing blade, the A motor, mortar pump, the collection stock tank, screw mandrel or oil pressure push rod, gunniting hole, connection bearing, slideway, drive link or oil compression rod, B motor or oil gear, wherein baffle links to each other with the drill bit of band baffle and whitewashing blade, the drill bit of band baffle and whitewashing blade links to each other with rotating vane, rotating vane links to each other with the whitewashing blade by connection bearing, shotcrete pipe links to each other with the whitewashing blade, the whitewashing blade links to each other with screw mandrel or oil pressure push rod, the whitewashing blade is provided with gunniting hole, screw mandrel or oil pressure push rod link to each other with drive link or oil compression rod, the whitewashing blade pass is crossed slideway and is skidded off, the A motor connects mortar pump, mortar pump access set stock tank, the mortar efferent duct of collection in the stock tank communicates with shotcrete pipe, and shotcrete pipe must communicate by gunniting hole above the blade with whitewashing, and drive link or oil compression rod link to each other with B motor or oil gear.
Advantage of the present invention: the mechanical type construction is efficient, quick, safe and reliable.Disposable formation globality, the uniform retaining wall of thickness; Wall body does not have seam, and airtight performance is good, can effectively stop underground water and other pollutant to contact with building pile foundation; Can prevent effectively that pile foundation from avoiding corrosion, increase pile foundation intensity, bearing capacity and the carrying time limit; Can effectively control underground water, mud and drift sand.Can provide safe construction space for underground pile foundation construction personnel; Can effectively carry transverse shearing force, increase the fastness of surface structures, reduce the destruction of natural calamities such as earthquake, typhoon building.
Description of drawings
Accompanying drawing 1 is that drill bit is just changeing the state diagram of sinking blade water spray.
Accompanying drawing 2 is that drill bit counter-rotating lifting blade is cut soil whitewashing state diagram.
Accompanying drawing 3 is blade water spray dilution soil layer state plane figures of packing up.
Accompanying drawing 5 is screw mandrel and baffle connection status figure.
Accompanying drawing 6 is oil compression rod and baffle connection status figure.
Accompanying drawing 7 is blade that oil compression rod or screw mandrel connect water spray dilution soil layer state plane figures when packing up.
Accompanying drawing 8 is to cut soil, whitewashing after the blade of oil pressure or screw mandrel connection skids off, and forms the retaining wall state plane figure.
In the accompanying drawing 1 is shotcrete pipe, the 2nd, whitewashing blade, the 3rd, baffle, the 4th, rotating vane, the 5th, the drill bit, the 6th of band baffle and whitewashing blade, A motor, the 7th, mortar pump, the 8th, collection stock tank, the 9th, screw mandrel or oil pressure push rod, the 10th, gunniting hole, the 11st, connection bearing, the 12nd, slideway, the 13rd, drive link or oil compression rod, the 14th, B motor or oil gear
The specific embodiment
Contrast accompanying drawing 1,2, its structure comprises drill bit 5, motor 6, mortar pump 7, the collection stock tank 8 of shotcrete pipe 1, whitewashing blade 2, baffle 3, rotating vane 4, band baffle and whitewashing blade, wherein baffle 3 links to each other with the drill bit 5 of band baffle and whitewashing blade, the drill bit of band baffle and whitewashing blade links to each other with rotating vane 4, rotating vane links to each other with whitewashing blade 2 by connection bearing, whitewashing blade 2 links to each other with shotcrete pipe 1, and motor 6 joins with mortar pump 7, and mortar pump joins with collection stock tank 8.
Contrast accompanying drawing 3,4, its structure is whitewashing blade 2, baffle 3, rotating vane 4, gunniting hole 10, connection bearing 11, wherein baffle 3 joins with the drill bit of band baffle and whitewashing blade, the drill bit of band baffle and whitewashing blade links to each other with rotating vane 4, whitewashing blade 2 links to each other with rotating vane 4 by connection bearing 11, and gunniting hole 10 is positioned at the termination of whitewashing blade 2.
Contrast accompanying drawing 5,6, its structure is that drive link or oil compression rod 13 link to each other with B motor or oil gear 14, and drive link or oil compression rod 13 link to each other with screw mandrel or oil pressure push rod 9, and screw mandrel or oil pressure push rod 9 link to each other with the whitewashing blade, and the whitewashing blade pass is crossed slideway 12 and is skidded off.
Contrast accompanying drawing 7,8, its structure are that whitewashing blade 2 links to each other with screw mandrel or oil pressure push rod 9.
Embodiment
The present invention is applied to the construction of Lianyun Harbour marine board maritime search and rescue center office building, this office building is high 18 layers, pile foundation engineering is designed to 900-1200mm diameter hole digging pile, length is 15 meters to 30 meters, in the construction drill bit 5 of the baffle in this equipment 3 with band baffle and whitewashing blade linked to each other, the drill bit 5 of band baffle and whitewashing blade links to each other with rotating vane 4, and the drill bit 5 of rotating vane 4 and baffle 3 baffles going along with and whitewashing blade is together according to same direction rotation in the work progress.When the drill bit 5 of band baffle and whitewashing blade punches according to turning clockwise, be in collapsed state with rotating vane 4 by the whitewashing blade 2 that connection bearing 11 links to each other, in the time of boring, utilize shotcrete pipe 1, by above the whitewashing blade 2 gunniting hole 10 sprays into soil layer with water, the dilution soil layer reduces frictional resistance.When punching the degree of depth that extremely needs, the drill bit 5 of band baffle and whitewashing blade, rotating vane 4 and baffle 3 are according to being rotated counterclockwise, whitewashing blade 2 is opened under the effect of soil layer reverse thrust, perhaps drive drive link or oil compression rod 13 by B motor or oil gear 14, utilize screw mandrel or oil pressure push rod 9 will whitewash blade 2 by slideway 12 releases, whitewashing blade 2 stretches in the soil layer, under the effect of connection bearing 11, with rotating vane 4 rotations, at this moment, utilize motor 6 and mortar pump 7, from the collection stock tank 8 with cement paste, mortar or other curing compound suction shotcrete pipes 1, by getting gunniting hole 10 ejection cement pastes above the whitewashing blade 2, mortar or other curing compound form whole induration retaining wall.
Though this location complicated geology in construction, mud 3-4 rice, powder fine sand sand bed is thicker, but landslide, askew hole phenomenon do not appear, mud, drift sand also are effectively controlled, guaranteed peripheral path and building safety, this job practices makes the fixed back of retaining wall hole wall regular, and pile is after check bearing capacity and pile quality all to meet design requirement.
The scope of application of the present invention: be applicable to that all boreholes and other need the pile foundation construction of retaining wall, be particularly useful for design, construction in the heavy construction pile foundation of complicated geological, major diameter, high-bearing capacity, the highrise building higher to requirement for bearing capacity, with the obvious advantage to the construction in soft foundation, coastal area, beach area.Drill bit whitewashing blade can be used the reverse thrust of soil layer and open, also can use screw mandrel in the bit blades or the oil pressure push rod blade of will whitewashing releases, when entering the stake end, adjust the blade extension elongation, after retaining wall solidifies, carry out the stake end by designing requirement and expand the end, can adopt artificial rock drilling to expand the end, the mechanical rock drilling expansion end, or explosion is expanded modes such as the end, installation reinforcing cage, perfusion pile concrete.
The pile wall globality that the present invention forms, directly perceived, thickness evenly, whole, no seam, airtight performance is good, can effectively control underground water, mud and drift sand; Can effectively stop corrosivity underground water to be invaded in the pile body, increase the pile foundation intensity bearing capacity and the carrying time limit.In the globality retaining wall, reinforcing cage is installed, concrete perfusion pile body, formed pile foundation engineering can effectively carry the fastness that transverse shearing force increases surface structures.Reduce the destruction of natural calamities such as earthquake, typhoon to building.Owing to can effectively control underground water, mud and drift sand, after retaining wall forms, can provide safety guarantee for the pile foundation construction personnel.
Whole panelling construction process is mechanized operation, but the construction of the clear hole of mechanical type, expanded bore pile reduces the input of manpower in the construction, and accelerating construction progress reduces construction cost.
The invention solves the difficult problem of protection wall of bored pile construction, increase the compliance of hole digging pile, it can higher generalization be used.
Can realize the expanded bore pile of pile foundation, solve the problem that other pile tubes, castinplace pile and construction of prefabricated piles cann't be solved, increase the stability and the bearing capacity of pile foundation engineering.
During the present invention has used and constructs, and combine, reached good effect with reality is effective.
Claims (2)
1. the job practices of one-step molded hole digging pile protecting wall is characterized in that this method comprises following construction sequence:
One, the drill bit of band baffle and whitewashing blade by shotcrete pipe, sprays into water with the dilution soil layer by boring clockwise from the whitewashing blade of packing up, and reduces the frictional force of soil layer, is convenient to the drill bit trouble-free operation;
Two, when bit drills when the needed degree of depth, drill bit changes into and being rotated counterclockwise, open whitewashing blade by the reverse thrust of soil layer or rack, oil compression rod mode this moment, the whitewashing blade carries out rotary-cut to the soil layer in the baffle outside, the whitewashing blade that is connected with shotcrete pipe simultaneously stops water spray, change water spray mud, mortar, in the time of whitewashing blade water spray mud, mortar drill bit upwards evenly is lifted out ground by being rotated counterclockwise, finally between baffle and soil layer, forms the airtight regular induration retaining wall of 100-300mm thickness;
Three, treat that retaining wall solidifies after, carry out machinery and revolve and dig hole operation clearly.
2. the construction equipment of one-step molded hole digging pile protecting wall, it is characterized in that comprising shotcrete pipe, the whitewashing blade, baffle, rotating vane, the drill bit of band baffle and whitewashing blade, the A motor, mortar pump, the collection stock tank, screw mandrel or oil pressure push rod, gunniting hole, connection bearing, slideway, drive link or oil compression rod, B motor or oil gear, wherein baffle links to each other with the drill bit of band baffle and whitewashing blade, the drill bit of band baffle and whitewashing blade links to each other with rotating vane, rotating vane links to each other with the whitewashing blade by connection bearing, shotcrete pipe links to each other with the whitewashing blade, the whitewashing blade links to each other with screw mandrel or oil pressure push rod, the whitewashing blade is provided with gunniting hole, screw mandrel or oil pressure push rod link to each other with drive link or oil compression rod, the whitewashing blade pass is crossed slideway and is skidded off, the A motor connects mortar pump, mortar pump access set stock tank, the mortar efferent duct of collection in the stock tank communicates with shotcrete pipe, and shotcrete pipe must communicate by gunniting hole above the blade with whitewashing, and drive link or oil compression rod link to each other with B motor or oil gear.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102576671A CN101922149B (en) | 2010-08-20 | 2010-08-20 | Construction method and construction equipment for one-step molded hole digging pile protecting wall |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102576671A CN101922149B (en) | 2010-08-20 | 2010-08-20 | Construction method and construction equipment for one-step molded hole digging pile protecting wall |
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| Publication Number | Publication Date |
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| CN101922149A true CN101922149A (en) | 2010-12-22 |
| CN101922149B CN101922149B (en) | 2011-09-07 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2010102576671A Expired - Fee Related CN101922149B (en) | 2010-08-20 | 2010-08-20 | Construction method and construction equipment for one-step molded hole digging pile protecting wall |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103899252A (en) * | 2014-04-23 | 2014-07-02 | 山西八建集团有限公司 | Underwater concrete-spraying wall-solidifying drill bit |
| CN104234042A (en) * | 2014-07-24 | 2014-12-24 | 王继忠 | Concrete pile forming device and construction method thereof |
| CN105019495A (en) * | 2015-07-15 | 2015-11-04 | 肖小玉 | Hole digging machine anchored by means of driving of lifting motor |
| CN106013157A (en) * | 2016-07-29 | 2016-10-12 | 长江勘测规划设计研究有限责任公司 | Coarse granular material dam gap jet stirring filling device |
| CN110820735A (en) * | 2019-11-14 | 2020-02-21 | 河南理工大学 | Expanding stirrer for forming holes in deep soft soil self-made retaining wall and hole forming method using expanding stirrer |
| CN113322931A (en) * | 2021-06-25 | 2021-08-31 | 长安大学 | Soft soil foundation consolidates compaction stake construction equipment |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06221076A (en) * | 1993-01-27 | 1994-08-09 | Maruyasu Doboku Kk | Ground excavating head |
| CN1814915A (en) * | 2006-02-24 | 2006-08-09 | 翟向滨 | Apparatus and method for long spiral-drilling enlarging-base agitation and reaming-in-hole concrete filling to form pile |
| RU2295005C1 (en) * | 2005-07-13 | 2007-03-10 | ГОУ ВПО "Санкт-Петербургский государственный архитектурно-строительный университет" | Method and device to erect bearing-and-enveloping structure provided with outer waterproofing means in ground |
| CN2895696Y (en) * | 2005-11-03 | 2007-05-02 | 南京路鼎搅拌桩特种技术有限公司 | Multifunction automatic diameter-enlarging drill bit |
| CN101514549A (en) * | 2009-04-01 | 2009-08-26 | 东南大学 | Method using intermediate mixing piles for treating three-layer soft foundation |
| CN101649612A (en) * | 2008-08-14 | 2010-02-17 | 刘全林 | Method for forming variable-diameter cement-soil stirring piles |
| CN201738316U (en) * | 2010-08-20 | 2011-02-09 | 徐守田 | Construction equipment for breast wall of once-through shaping dug pile |
-
2010
- 2010-08-20 CN CN2010102576671A patent/CN101922149B/en not_active Expired - Fee Related
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06221076A (en) * | 1993-01-27 | 1994-08-09 | Maruyasu Doboku Kk | Ground excavating head |
| RU2295005C1 (en) * | 2005-07-13 | 2007-03-10 | ГОУ ВПО "Санкт-Петербургский государственный архитектурно-строительный университет" | Method and device to erect bearing-and-enveloping structure provided with outer waterproofing means in ground |
| CN2895696Y (en) * | 2005-11-03 | 2007-05-02 | 南京路鼎搅拌桩特种技术有限公司 | Multifunction automatic diameter-enlarging drill bit |
| CN1814915A (en) * | 2006-02-24 | 2006-08-09 | 翟向滨 | Apparatus and method for long spiral-drilling enlarging-base agitation and reaming-in-hole concrete filling to form pile |
| CN101649612A (en) * | 2008-08-14 | 2010-02-17 | 刘全林 | Method for forming variable-diameter cement-soil stirring piles |
| CN101514549A (en) * | 2009-04-01 | 2009-08-26 | 东南大学 | Method using intermediate mixing piles for treating three-layer soft foundation |
| CN201738316U (en) * | 2010-08-20 | 2011-02-09 | 徐守田 | Construction equipment for breast wall of once-through shaping dug pile |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103899252A (en) * | 2014-04-23 | 2014-07-02 | 山西八建集团有限公司 | Underwater concrete-spraying wall-solidifying drill bit |
| CN103899252B (en) * | 2014-04-23 | 2016-06-15 | 山西八建集团有限公司 | The solid wall drill bit of whitewashing under water |
| CN104234042A (en) * | 2014-07-24 | 2014-12-24 | 王继忠 | Concrete pile forming device and construction method thereof |
| CN105019495A (en) * | 2015-07-15 | 2015-11-04 | 肖小玉 | Hole digging machine anchored by means of driving of lifting motor |
| CN106013157A (en) * | 2016-07-29 | 2016-10-12 | 长江勘测规划设计研究有限责任公司 | Coarse granular material dam gap jet stirring filling device |
| CN106013157B (en) * | 2016-07-29 | 2018-06-19 | 长江勘测规划设计研究有限责任公司 | A kind of device in jet mixing filling Coarse Aggregate dam body gap |
| CN110820735A (en) * | 2019-11-14 | 2020-02-21 | 河南理工大学 | Expanding stirrer for forming holes in deep soft soil self-made retaining wall and hole forming method using expanding stirrer |
| CN113322931A (en) * | 2021-06-25 | 2021-08-31 | 长安大学 | Soft soil foundation consolidates compaction stake construction equipment |
Also Published As
| Publication number | Publication date |
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| CN101922149B (en) | 2011-09-07 |
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