CN1109793C - Method and apparatus for triple pipe rotary spray of reinforced concrete pile foundation - Google Patents
Method and apparatus for triple pipe rotary spray of reinforced concrete pile foundation Download PDFInfo
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- CN1109793C CN1109793C CN 99112888 CN99112888A CN1109793C CN 1109793 C CN1109793 C CN 1109793C CN 99112888 CN99112888 CN 99112888 CN 99112888 A CN99112888 A CN 99112888A CN 1109793 C CN1109793 C CN 1109793C
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- reinforced concrete
- rotary spray
- concrete pile
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- soil
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- Placing Or Removing Of Piles Or Sheet Piles, Or Accessories Thereof (AREA)
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Abstract
The present invention relates to a method and apparatus for triple-pipe rotary spray reinforced concrete pile foundations. The method comprises the steps of hole penetration, soil body cutting, chip removal and grouting, and also adds the steps of opening surface soil, erecting a reinforced cage, pouring rubble aggregates and vibrating, mixing and preserving the materials. The method solves the problem that a rotary spray technique only can complete a reinforcing body of single slurry liquid, and the rotary spray technique is extended for completing reinforced concrete pile foundation engineering. The apparatus, namely a flow guide device, adopts three pipes for central seal. An inner cavity of a water nozzle is composed of a cone and a cylinder. An inner cavity of a gas nozzle is composed of a conical barrel and a cylindrical and annular barrel. The position of a slurry liquid nozzle has a distance of 800mm to 1200mm away from the lower part of a water vapor nozzle. The present invention improves economic and technical indexes.
Description
Affiliated technical field:
The present invention relates to a kind of triple pipe rotary spray of reinforced concrete pile foundation method, belong to the construction work ground and handle and the Foundation Design technical field.Be applicable to the construction technology of the underground building works of industry and civilian construction, public work, bridges and culverts, subway, people's air defense, harbor work, water conservancy project and mine engineering.
Background technology:
The high pressure jet grouting technology is to carry out in China the beginning of the seventies.Progressively improved its technical performance by single tube, double pipe, triple pipe, the needs that day by day enlarge on the construction work ground is handled have been satisfied, but, the ground that is confined to that it is difficult to surmount on the road of development is handled in this scope, can only finish the cutting of the soil body, the induration that slurries stirred and obtained single slurries, can not churning become concrete stake and reinforced concrete pile, can not become the Foundation Design works.Be used for the ground processing though high pressure jet grouting can eject multiple stake shape, a stake top ends can not be exposed ground surface.This is that soil layer will be broken into fragment because arrive apart from face of land 400-500mm place when churning, drops to the quality of influence stake in the core.Therefore, otherwise churning pile operation is improved, be difficult to satisfy the higher needs of construction work.In addition, existing high-pressure rotary-spray equipment is difficult to satisfy new economic and technical norms requirement, exists following problem: the sealing of (1) triple pipe air deflector only adapts to hydraulic pressure below 40Mpa, can not satisfy the above high pressure requirement of 50MPa.(2) gas blowout on the triple pipe shower nozzle is chewed with the water nozzle set and is connected into the taper inflator, makes gas jet and water jet cross influence water jet quality, quickens water jet kinetic energy and disappears too early.(3) distance of slurry nozzle and aqueous vapor nozzle too closely (140-150mm), cause the slurries jet to be in the stirring section of water vapor jet, it is bigger to impel the one side slurries to be mixed the waste of the discharge face of land by the aqueous vapor silt particle, slurries are by aqueous vapor sand dilution (β=0.3-0.6) on the other hand, the low concretion body strength that forms of concentration of slurry is poor, the low and high shortcoming of cost of workmanship.
Summary of the invention:
The objective of the invention is at the technical problem of above-mentioned existence and a kind of triple pipe rotary spray of reinforced concrete pile foundation method is provided.It makes it to finish Foundation Design structure----concrete structure, steel bar concrete and the antiseepage concrete structure of the higher demand of construction work by high-pressure rotary-spray construction technological system is improved.And the great breakthrough of realization on range of application, construction quality, construction speed and economic and technical norms.
Triple pipe rotary spray of reinforced concrete pile foundation method of the present invention, the cutting, chip removal and the grouting procedure that comprise pore-creating, the soil body, it is characterized in that it also comprises the native opening of table, reinforcing cage sets up, pours into crushed stone aggregate and the health operation is smash in shake, the native opening operation of described table, according to table soil nature matter difference, take before churning, to puzzle earlier fore shaft and spray again; Or light is provided with on the aperture and protects a mouthful device and spray; Or once be sprayed onto face of land opening from bottom to top; Or earlier sprayed soil layer from top to bottom and sprayed layer of sand more from bottom to top; Or be sprayed onto from bottom to top apart from face of land 0.4-0.5M stop-spraying, shower nozzle is proposed, transfer the plug device filling of inflatable footpath and support, excavate the native opening of table; In the stake hole of opening, in the slurries, transfer reinforcing cage, pour into grade crushed stone aggregate and the shake that prepare and smash health.
Triple pipe rotary spray of reinforced concrete pile foundation method advantage of the present invention is as follows:
The inventive method has solved the needs of the underground building Foundation Design of day different development.It has changed falling behind of hand excavated pile problem vivid and that hurt sb.'s feelings in the hole of collapsing.Relatively the mechanical piling technology is little because of the stake footpath, can not expand at the end, and bearing capacity of single pile is very little, especially runs into the worse serious shortcoming of weak soil layer bearing capacity.The high-pressure rotary-spray piling technique, because of it is applicable to all kinds of soil layers, the various degree of depth and not limited by groundwater table can both satisfy the design needs to greatest extent.Increase the stake footpath, the end, expanded in multiple spray, exceeds the bearing capacity of single pile of several times of mechanical pilings easy as can.In the deep foundation pit construction of underground building, not water funk, do not establish drainage by well points, can finish the curtain engineering of bank protection and waterproof well.Therefore, it can guarantee workmanship, reduction of erection time and reduction engineering cost.
Describe the present invention in detail below in conjunction with embodiment:
The specific embodiment:
The present invention is applied in the foundation structure of building engineering, is to use the triple pipe rotary spray of reinforced concrete pile foundation method, in layer variously, can churning become various stake shapes, and can expose ground surface to the stake top.Formation of pile is earlier with common rig pore-creating, and hole depth is pressed the super darker 1.5M of designing requirement downwards, transfers triple pipe equipment then at the bottom of the hole.The parameter that this moment, individual device was chosen by appointment, high-pressure pump are for clear water, and air compressor air feed, slush pump elder generation's this moment are for clear water.Directly need triple pipe only to rotate not promote in order to expand the end, approximately process is after 3-5 minute, through this section cutting soil and chip removal effect, when thinking that expanding the end directly satisfies the demand, triple pipe begins to promote, limit cutting edge chip removal when churning promotes, bottom has caused one section space, when rising to space, the 800-1200mm left and right sides, when the cement paste supply is not influenced by the aqueous vapor stirring section, slush pump is by changing water supply mud into for clear water, from then on begin to be pile normal operation work, triple tube edges promote while rotating cutting soil limit chip removal limit water supply mud, and churning always is to the stake top, after proposing triple pipe, reinforcing cage is transferred in the aperture, crushed stone aggregate add the shake smash reinforced concrete pile.But face of land opening is exposed on the stake top, it is layer of sand that base area expression condition difference has five kinds of forms to select (1) ground surface, earlier after one of stake aperture upper cover is protected mouthful device, can be directly from bottom to top churning to the face of land, broken the broken sand lump that falls down with spraying again, then descending reinforcing cage and crushed stone aggregate add the shake smash reinforced concrete pile.(2) the dark 6-7 rice of stake, rotary churning pile churning from top to bottom spray again to clean after expanding the end in bottom and send cement paste then to projected depth, transfer the reinforcing cage crushed stone aggregate add shake smash with (1).(3) shallow surface be soil layer, below be layer of sand, earlier build fore shaft with manually diging up table soil, churning from bottom to top is up to the stake top then, cement paste is sent in churning bottom simultaneously, earth water will be taken out in top, descending reinforcing cage is (1) together.(4) shallow surface is a soil layer, removes table soil and need not manually dig, and available churning is sprayed onto layer of sand downwards and stops from the face of land, then triple pipe is transferred to projected depth, and churning from bottom to top is up to the stake top, and the descending reinforcing cage pile is with (1).(5) in soil layer, the bottom does not have layer of sand to pile body entirely, and churning churning is from bottom to top arrived the face of land apart from the 400-500mm stop-spraying, proposes triple pipe, puts next plug footpath device again from the aperture, removes soil layer with instrument.Though five kinds of stake opening modes are arranged, it is the same becoming the reinforced concrete pile method at last to the descending reinforcing cage pile with (1).If do not transfer reinforcing cage the concrete stake.
Claims (1)
1. triple pipe rotary spray of reinforced concrete pile foundation method, the cutting, chip removal and the grouting procedure that comprise pore-creating, the soil body, it is characterized in that it also comprises the native opening of table, reinforcing cage sets up, pours into crushed stone aggregate and the health operation is smash in shake, the native opening operation of described table, according to table soil nature matter difference, take before churning, to puzzle earlier fore shaft and spray again; Or on the aperture, be provided with earlier and protect a mouthful device and spray again; Or once be sprayed onto face of land opening from bottom to top; Or earlier sprayed soil layer from top to bottom and sprayed layer of sand more from bottom to top; Or be sprayed onto from bottom to top apart from face of land 0.4-0.5M stop-spraying, shower nozzle is proposed, transfer the plug device filling of inflatable footpath and support, excavate the native opening of table; In the stake hole of opening, in the slurries, transfer reinforcing cage, pour into grade crushed stone aggregate and the shake that prepare and smash health.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 99112888 CN1109793C (en) | 1999-04-28 | 1999-04-28 | Method and apparatus for triple pipe rotary spray of reinforced concrete pile foundation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 99112888 CN1109793C (en) | 1999-04-28 | 1999-04-28 | Method and apparatus for triple pipe rotary spray of reinforced concrete pile foundation |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1232112A CN1232112A (en) | 1999-10-20 |
| CN1109793C true CN1109793C (en) | 2003-05-28 |
Family
ID=5276137
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 99112888 Expired - Fee Related CN1109793C (en) | 1999-04-28 | 1999-04-28 | Method and apparatus for triple pipe rotary spray of reinforced concrete pile foundation |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1109793C (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103266593B (en) * | 2013-06-19 | 2015-08-26 | 上海轨道交通十号线发展有限公司 | A kind of micro-disturbance sprays reinforcing device fast |
| CN103790152B (en) * | 2014-01-17 | 2015-09-09 | 株式会社N.I.T. | Pressure controllable in ground and without mud emission high pressure jet grouting system and construction method |
| CN105178858B (en) * | 2015-10-10 | 2018-03-27 | 中铁科工集团轨道交通装备有限公司 | A kind of drilling tool for two-tube high-pressure rotary-spray technique |
| CN105507813B (en) * | 2016-01-19 | 2017-12-05 | 江苏省无锡探矿机械总厂有限公司 | A kind of multimedium can confluence ultrahigh pressure nozzle |
| CN110616709A (en) * | 2018-06-20 | 2019-12-27 | 北京东地岩土工程有限公司 | Triple-pipe three-high-pressure jet grouting pile construction method |
-
1999
- 1999-04-28 CN CN 99112888 patent/CN1109793C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN1232112A (en) | 1999-10-20 |
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