CN103835292B - High frequency vibrating rushes the construction method of base-extending deposited pile tube - Google Patents
High frequency vibrating rushes the construction method of base-extending deposited pile tube Download PDFInfo
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- CN103835292B CN103835292B CN201310688550.2A CN201310688550A CN103835292B CN 103835292 B CN103835292 B CN 103835292B CN 201310688550 A CN201310688550 A CN 201310688550A CN 103835292 B CN103835292 B CN 103835292B
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Abstract
The invention discloses a kind of high frequency vibrating and rush base-extending deposited pile tube and construction method thereof, the lower end that high frequency vibrating rushes base-extending deposited pile tube is provided with the Broken Stone Concrete complex of the cement paste parcel of match head, and Broken Stone Concrete complex is that the building waste of 3 ~ 8 ㎝ and cement paste condense and form by average diameter.Construction method be according to designing requirement pile tube hammering, static pressure to design elevation, use high frequency vibrating impacter to punching of shaking bottom pile tube, and fill granule building waste and cement paste, at pile tube lower end formation Broken Stone Concrete complex.High frequency vibrating of the present invention rushes base-extending deposited pile tube and has comparatively big bear intensity, and Broken Stone Concrete complex ensures the supporting capacity that pile tube is higher; Construction method of the present invention can effectively penetrate layer of sand and crust layer, and efficiency of construction is high, and construction cost is low, and the comparatively large and high-efficiency environment friendly of bearing capacity of single pile, construction method of the present invention can be used in pile tube, use free-falling hammer to ram building waste and forms enlarged footing.
Description
Technical field
The present invention relates to a kind of building structure and construction method, be specifically related to a kind of high frequency vibrating and rush base-extending deposited pile tube and construction method thereof.
Background technology
Prestressing concrete pipe pile is called for short PC, PHC pile tube, it has factorial praluction, the stretch-draw of pile body prestressed reinforcement, the features such as after concrete stream curing, high-pressure steaming and cultivating, concrete strength is high, and steady quality is reliable, standardized production degree is high, hoisting transportation, site operation are convenient are welcome by numerous owners, design, unit in charge of construction deeply.
Prestressing concrete pipe pile introduce from the nineties initial stage Guangdong this technology till now, pile tube produce tube pile construction spread all on both sides of the Changjiang River, in all parts of the country, construction method touches transition from free-falling hammer to diesel hammer weight, static pressure construction also from wire rope back-pressure till now large-tonnage static hydraulic push-in piling construction be main.
But no matter tube pile construction adopts hammering or static-pressure construction method now, mostly be Squeezing Soil Pile, it is inevitable that by stake extruding, the soil body is disturbed, change the stress state of the soil body, larger soil compaction effect is produced to closely knit cohesive soil, easily grouped piles cap stake and the closeer stake of pile spacing are produced and the stake soil body be pressed into is extruded again and float, stake end is by " unsettled ", make the bearing capacity of stake not reach designing requirement, piling or Reinforcing Schemes must be taked, not only time-consuming, but also take economy; And due to geological condition different, equipment choosing is improper, finds that stake woods phenomenon is comparatively general in construction and excavation process, and owing to not reaching projected depth, pile tube exceeds a top mark height 1-3 rice.In addition, due in tube pile construction process, general design all adopts friction pile as bearing capacity of single pile, bearing capacity of single pile and pile shaft concrete strength are all smaller, do not play the advantage of pile body height concrete, so for the problems referred to above, need design high frequency vibrating to rush base-extending deposited pile tube equipment and construction technology, overcome the deficiency of existing pile tube and construction.
Summary of the invention
The technical issues that need to address of the present invention are just the defect overcoming prior art, provide a kind of high frequency vibrating to rush base-extending deposited pile tube and construction method thereof.High frequency vibrating rushes base-extending deposited pile tube and has larger support strength, and the Broken Stone Concrete complex of bottom ensure that the supporting capacity that pile tube is stronger; Construction method of the present invention effectively can penetrate crust layer, and efficiency of construction is high, and construction cost is low, and bearing capacity of single pile is comparatively large, improves construction quality.
For solving the problem, the present invention adopts technical scheme to be:
High frequency vibrating rushes base-extending deposited pile tube, the Broken Stone Concrete complex that the cement paste that the lower end that high frequency vibrating rushes base-extending deposited pile tube is provided with match head wraps up, Broken Stone Concrete complex by average diameter be the fragment of brick of 3 ~ 8 ㎝, rubble, concrete block building waste and cement paste condense and form, Broken Stone Concrete complex is spherical or elliposoidal, the diameter of Broken Stone Concrete complex is 0.8 ~ 2m, determines depending on pile tube diameter and designing requirement.The Broken Stone Concrete complex of pile tube bottom effectively can improve the bearing capacity of single pile of pile tube, keeps stability and the quality of pile tube.
High frequency vibrating rushes the construction method of base-extending deposited pile tube:
(1) according to designing requirement pile tube hammering, static pressure to design elevation, pile tube penetrate flour sand, silt process time use high frequency vibrating rush equipment inject high pressure water column in hole of post, high frequency vibrating impacter in hole of post washes away through upper and lower exciting force, it is crowded to shake, make original state flour sand, silt form mud, form hole in the end of pile tube and pile tube is shaken punching to designing absolute altitude at the bottom of stake; After penetrating flour sand, silt, crust layer, high frequency vibrating impacter quits work, and by hammering and static pressure mode, pile tube is pressed to design stake end absolute altitude.
(2) open high frequency vibrating impacter to shake punching to pile tube bottom soil; High-Pressure Water is penetrated by vibrating impacter head, the upper and lower that High-Pressure Water produces through high frequency vibrating impacter washes away to exciting force, shake crowded foundation soil pore-forming, until pipe pile end portion, drop into fragment of brick, rubble, concrete block building waste that average diameter is 3 ~ 8 ㎝ subsequently, open the high frequency vibrating impacter exciting force that little pump water gaging mud produces through high frequency vibrating impacter to wash away, shake and press fragment of brick, rubble, concrete block, and the Zinc fractions enlarged footing of compacting, compacted pipe pile end portion.
(3) in hole of post, constantly add the building waste that average diameter is 3 ~ 8 ㎝ and building waste is shaken punching at the bottom of stake under 0.8 ~ 2m, then large pump amount injects thick cement paste to pile tube lower end;
(4) use high frequency vibrating impacter to carry out secondary to shake punching and shake for three times and be punched in the enlarged footing that the formation of pile tube bottom reaches design specifications; After water under high pressure mud filling enlarged footing, at the bottom of stake, pile peripheral earth and the tubular pile body periphery soil body produce grout phenomenon; Shake at building wastes such as bat, rubble, concrete blocks and force down, the structure of having shaken undisturbed soil close, and after the filling of water under high pressure mud, to at the bottom of stake, pile peripheral earth and the tubular pile body periphery soil body produce grout phenomenon, enhance pile perimeter resistance, reach the effect improving bearing capacity of single pile, substantially increase the bearing capacity of single pile of pile tube.
(5) stop high frequency vibrating impacter and grout filling operation, cement paste and building waste condense at enlarged footing place the Broken Stone Concrete complex that the cement paste that forms match head wraps up.
The present invention is in order to improve the supporting capacity of Broken Stone Concrete complex, preferably technical scheme has, and the lower end of pile tube is positioned at Broken Stone Concrete complex, and the distance of distance Broken Stone Concrete complex upper end, pile tube lower end is no less than the pile tube diameter of 1 ~ 2 times, enlarged footing diameter is determined depending on designing requirement, calculates inventory.
The present invention rushes effect and pipe pile end portion soil texture density to improve to shake, and preferably technical scheme also has, and the average diameter of the fragment of brick dropped in hole of post, rubble, concrete block building waste is 3 ~ 8 ㎝.
The present invention rushes effect and pipe pile end portion soil texture density to improve to shake further, preferably technical scheme also has, and uses in step (4) high frequency vibrating impacter to carry out secondary and shakes while punching and shaking for three times is rushed in hole of post, add fragment of brick, rubble, concrete block building waste.
The present invention is in order to improve the bearing capacity of Broken Stone Concrete complex, and to improve the supporting capacity of pile tube, preferably technical scheme also has, and the width of elliposoidal Broken Stone Concrete complex is 4/5 ~ 3/5 of Broken Stone Concrete complex height.
Construction method of the present invention is used for the construction of prestressing concrete pipe pile.
The effect that feed intake number of times and construction technology of the present invention can be used in using free-falling hammer to ram in pile tube the building wastes such as bat, rubble, concrete block reach compacting pile end undisturbed soil and enlarged footing.
Advantage of the present invention and beneficial effect are:
High frequency vibrating of the present invention rushes base-extending deposited pile tube and has stronger supporting capacity, and warp is with effectively with stake footpath Experimental Comparison, and bearing capacity of single pile improves 20 ﹪ ~ 80 ﹪;
Construction method of the present invention, solved by high frequency vibrating punching and penetrate soil layer in the middle of closely knit flour sand, silt, blade draws the inadequate difficult problem of the hole stake machine degree of depth.And at the bottom of stake, adopt the building wastes such as bat, rubble, concrete block as auxiliary material, shake behind the squeezed end and form enlarged footing, substantially increase bearing capacity of single pile, not only energy-conservation, reduce discharging, environmental protection but also meet the requirement of green construction, single pile cost is more economical, and economic results in society are more remarkable.And this construction method can effectively penetrate flour sand, silt, crust layer, and efficiency of construction is high, and construction cost is low, bearing capacity of single pile is comparatively large, improves construction quality.The effect that feed intake number of times and construction technology of the present invention can be used in using free-falling hammer to ram in pile tube the building wastes such as bat, rubble, concrete block reach compacting pile end undisturbed soil and enlarged footing.
Accompanying drawing explanation
Fig. 1 is the construction method flow chart that high frequency vibrating of the present invention rushes base-extending deposited pile tube.
In figure: 1, earth's surface; 2, shake drift; 3, enlarged footing; 4, pile tube; 5, Broken Stone Concrete complex; The operation of A, step 1; The operation of B, step 2; The operation of C, step 3; The operation of D, step 4; The operation of E, step 5.
Detailed description of the invention
The following example will further illustrate the present invention.
High frequency vibrating rushes base-extending deposited pile tube, the Broken Stone Concrete complex 5 that the cement paste that the lower end that high frequency vibrating rushes base-extending deposited pile tube is provided with match head wraps up, Broken Stone Concrete complex 5 by particle mean size be the fragment of brick of 5 ㎝, rubble, concrete block building waste and cement paste condense and form, Broken Stone Concrete complex 5 is elliposoidal, and the diameter of Broken Stone Concrete complex 5 is 1.8m(Φ 600mm pile tube).
High frequency vibrating rushes the construction method of base-extending deposited pile tube, and this construction method step is:
(1) according to designing requirement from earth's surface 1 pile tube 4 hammering, static pressure to design elevation, pile tube 4 penetrate flour sand, silt process time use high frequency vibrating rush equipment inject high pressure water column in hole of post, high frequency vibrating impacter in hole of post washes away through upper and lower exciting force, it is crowded to shake, make original state flour sand, silt form mud, form hole in the end of pile tube 4 and pile tube 4 is shaken punching to designing absolute altitude at the bottom of stake;
(2) in hole of post, fragment of brick, rubble, the concrete block building waste that average diameter is 5 ㎝ is dropped into, open the drift 2 that shakes of high frequency vibrating impacter, with little pump water gaging mud, fragment of brick, rubble, concrete block are shaken punching, and extrude pile tube 4 bottom soil carry out compacting, compacted, expand end operation;
(3) in hole of post, constantly add the building waste that average diameter is 5 ㎝ and building waste is shaken punching at the bottom of stake under 1.8m(Φ 600mm pile tube) form enlarged footing 3, then large pump amount injects cement paste to pile tube 4 lower end;
(4) use high frequency vibrating impacter to carry out secondary to shake punching and shake for three times and be punched in the enlarged footing 3 that the formation of pile tube 4 bottom reaches design specifications size; After water under high pressure mud filling enlarged footing 3, at the bottom of stake, pile peripheral earth and the pile tube 4 pile body periphery soil body produce grout phenomenon;
(5) stop high frequency vibrating impacter and grout filling operation, cement paste and building waste condense at enlarged footing 3 place the Broken Stone Concrete complex 5 that the cement paste that forms match head wraps up.The width of elliposoidal Broken Stone Concrete complex 5 is 4/5 of Broken Stone Concrete complex 5 height.
Last it is noted that obviously, above-described embodiment is only for example of the present invention is clearly described, and the restriction not to embodiment.For those of ordinary skill in the field, can also make other changes in different forms on the basis of the above description.Here exhaustive without the need to also giving all embodiments.And thus the apparent change of amplifying out or variation be still among protection scope of the present invention.
Claims (6)
1. high frequency vibrating rushes the construction method of base-extending deposited pile tube, it is characterized in that, this construction method step is:
(1) according to designing requirement pile tube hammering, static pressure to design elevation, pile tube penetrate flour sand, silt process time use high frequency vibrating rush equipment inject high pressure water column in hole of post, high frequency vibrating impacter in hole of post washes away through upper and lower exciting force, it is crowded to shake, make original state flour sand, silt form mud, form hole in the end of pile tube and pile tube is shaken punching to designing absolute altitude at the bottom of stake;
(2) in hole of post, fragment of brick, rubble, the concrete block building waste that average diameter is 3 ~ 8 ㎝ is dropped into, open the little pump water gaging mud of high frequency vibrating impacter to shake punching, extruding to fragment of brick, rubble, concrete block building waste, compacting, compacted, expansion end operation are carried out to pile tube bottom soil;
(3) in hole of post, constantly add the building waste that average diameter is 3 ~ 8 ㎝ and building waste is shaken punching at the bottom of stake under 0.8 ~ 2m, then large pump amount injects thick cement paste to pile tube lower end;
(4) use high frequency vibrating impacter to carry out secondary to shake punching and shake for three times and be punched in the enlarged footing that the formation of pile tube bottom reaches design specifications; After water under high pressure mud filling enlarged footing, at the bottom of stake, pile peripheral earth and the tubular pile body periphery soil body produce grout phenomenon;
(5) stop high frequency vibrating impacter and grout filling operation, cement paste and building waste condense at enlarged footing place the Broken Stone Concrete complex that the cement paste that forms match head wraps up.
2. high frequency vibrating as claimed in claim 1 rushes the construction method of base-extending deposited pile tube, and it is characterized in that, the lower end of pile tube is positioned at Broken Stone Concrete complex, and the distance of distance Broken Stone Concrete complex upper end, pile tube lower end is no less than the pile tube diameter of 1 ~ 2 times.
3. high frequency vibrating as claimed in claim 2 rushes the construction method of base-extending deposited pile tube, it is characterized in that, the average diameter of the fragment of brick dropped in hole of post, rubble, concrete block building waste is 5 ㎝.
4. high frequency vibrating as claimed in claim 3 rushes the construction method of base-extending deposited pile tube, it is characterized in that, uses high frequency vibrating impacter to carry out secondary and shake while punching and shaking for three times is rushed in hole of post, add fragment of brick, rubble, concrete block building waste in step (4).
5. high frequency vibrating as claimed in claim 4 rushes the construction method of base-extending deposited pile tube, and it is characterized in that, the width of elliposoidal Broken Stone Concrete complex is 3/5 ~ 4/5 of Broken Stone Concrete complex height.
6. high frequency vibrating as claimed in claim 5 rushes the construction method of base-extending deposited pile tube, and it is characterized in that, this construction method is for improving the bearing capacity of single pile of prestressing concrete pipe pile; Number of times and the construction technology of feeding intake of the present invention can be used in pile tube, use free-falling hammer to ram bat, rubble, concrete block building waste, reaches the effect of compacting pile end undisturbed soil and enlarged footing.
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| CN106245641A (en) * | 2016-09-29 | 2016-12-21 | 李昊洋 | PHC pile tube post grouting construction technique and PHC pile tube composite pile |
| CN107905212B (en) * | 2017-09-27 | 2019-08-27 | 中铁三局集团有限公司 | A kind of construction method of water filling element earth pile composite foundation in situ |
| CN110374095A (en) * | 2019-07-18 | 2019-10-25 | 广东厚普建设工程有限公司 | A kind of soft soil foundation compounding method |
| CN110952916A (en) * | 2019-11-28 | 2020-04-03 | 武汉金瑞威基础工程有限公司 | Construction method for crushing and dismantling deep part of old building pile foundation |
| CN114808943A (en) * | 2022-04-07 | 2022-07-29 | 山东省公路桥梁建设集团有限公司 | Grouting construction process for micro steel pipe |
| CN115492088B (en) * | 2022-09-28 | 2023-09-12 | 中铁二院昆明勘察设计研究院有限责任公司 | Pile forming method for pile bottom enlarged grouting CFG pile in karst region |
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| SU1032102A1 (en) * | 1982-03-01 | 1983-07-30 | Брестский инженерно-строительный институт | Pile |
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