CN102505684A - Hollow stiffness-core slurry-solidified discrete material pile and construction method thereof - Google Patents
Hollow stiffness-core slurry-solidified discrete material pile and construction method thereof Download PDFInfo
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Abstract
The invention discloses a hollow stiffness-core slurry-solidified discrete material pile and a construction method thereof. The periphery of a pile body is a slurry-solidified discrete material pile. The center of the pile body is a small-diameter prefabricated concrete pipe pile. Slurry filling holes are left on the pile wall of the prefabricated concrete pipe pile at intervals. Slurry enters discrete materials through holes in the middle of the concrete pipe pile and the slurry filling holes. Peripheral discrete materials are integrally cemented and solidified through cement slurry. At the same time, under the effect of slurry filling pressure, the slurry seeps into pile periphery soil bodies and the strength of the pile periphery soil is improved; the slurry fills the holes in the middle of the concrete pipe pile; and a prefabricated pipe pile can be formed by multiple sections which can be connected through bolts. The construction method comprises technical steps of: forming holes, placing the pipe pile, installing a sealing cover and a slurry filling pump, washing the holes by using clean wash, putting the discrete materials, filling the slurry, solidifying, forming the pile and the like. The hollow stiffness-core slurry-solidified discrete material pile and the construction method have the advantages that the construction processes are clear, the construction speed is fast, the pile forming effect is good, the bearing capacity is high, the manufacturing cost is low, the resources are fully utilized, the environment is protected and the energy is saved.
Description
Technical field
The invention belongs to the civil construction project technical field, particularly a kind of hollow strength core slurry bonded dispersed body material stake and job practices thereof.
Background technology
In engineering constructions such as road, harbour, bridge, pile foundation is widely used.The pile foundation vertical bearing capacity is made up of pile side friction and end resistance two parts, and the performance of pile side friction seems particularly important in deep soft soil foundation.How improving the unit materials rate of utilization of strength, when saving the constructional materials consumption, improve bearing capacity of pile foundation, is one of long-term important topic of paying close attention to of researcher.In addition, along with the quickening of China's urban construction process, produce building wastes such as a lot of discarded fragments of brick, stone, concrete block, slag, how these building wastes being turned waste into wealth is used, and is the problem that is worth research.
Discrete material piles such as broken stone pile, sand pile are a kind of pile foundation types commonly used in the engineering at present, but the intensity of discrete material pile itself is lower, can only bear less load.Have a variety of methods can improve strength of the mixing pile, for example in pile body, gain in strength higher " strength core " strengthens strength of the mixing pile, reaches the effect of rigid pile.
Before the present invention; China applies for a patent (application number: 200310112791.9) disclose a kind of strength core composite pile and job practices; The periphery of pile body is the bulk solid stake, and the center of bulk solid stake is provided with high bond strength stake core and forms compound pile, to improve strength of the mixing pile.But the intensity of this type periphery discrete material is low, is difficult to improve bigger frictional force, and pile body makes discrete material separate with high bond strength stake core easily under big external load effect and reduces bearing capacity.Simultaneously the high bond strength stake core that is provided with of center is solid pile body, solid pile body concrete large usage quantity, and differ greatly with discrete material rigidity, be difficult for the supporting capacity of its material of performance.As to improve strength of the mixing pile, can adopt cement grout that all discrete materials of stake are solidified, but the stake core of the compound pile body of this strength heart is the entity stake, does not have the passage of slip casting, therefore can not carry out grouting and reinforcing.With vibration sinking tube method injection stake core, vibration itself has considerable influence to surrounding environment in discrete material, and discrete material is when being harder material such as rubble, and immersed tube is difficult for squeezing into, promptly enables to squeeze into, and also needs very big energy, has therefore wasted the energy.
Summary of the invention
The objective of the invention is to overcome above-mentioned defective, a kind of hollow strength core slurry bonded dispersed body material stake and job practices thereof are provided.
For solving the problems of the technologies described above, the technical scheme that the present invention adopts is: the stake of a kind of hollow strength core slurry bonded dispersed body material, and outside the pile body
Week is the slurry bonded dispersed body material stake, and the pile body center is the minor diameter prefabricated concrete pipe pile, and prefabricated hollow concrete pile tube pile lining has injected hole at a certain distance, and slurries get into discrete material through hole in the middle of the hollow concrete pile and injected hole; The periphery discrete material adopts the cement paste gluing to be frozen into integral body; Slurries infiltrate pile peripheral earth under the grouting pressure effect, improve all native intensity of stake; Slurries fill up the hole in the middle of the concrete pile simultaneously; Said prefabricated concrete pipe pile external diameter is 200 ~ 300 mm, and wall thickness is 50 ~ 100 m, whenever leaves injected hole at a distance from 0.2 ~ 0.5 m on the pile lining longitudinal section, and injected hole is quincunx and is interspersed; Seal cover is installed at said prefabricated concrete pipe pile top; The discrete material that said pile body is filled can be rubble, sand, also can be building pigment rubbish or discarded slag.When stake was long, prefabricated tubular pile can be formed by connecting multistage, and the connected mode preferred bolt connects.
The job practices of a kind of hollow strength core slurry bonded dispersed body material of the present invention stake adopts following technical step to realize:
(1) rig gets into ground to projected depth pile hole, and stake hole periphery adopts mud off;
(2) in the stake hole, put into the minor diameter prefabricated concrete pipe pile, when pile tube is multistage, adopts bolt to connect back one section one section and put into;
(3) seal cover is installed at the pile tube top, seal cover is connected with grouting pump through flexible pipe;
(4) hole through the pile tube pile lining injects the clear water hole flushing;
(5) in the stake hole, drop into discrete material;
(6) in the stake hole, inject slurries by the hole of grouting pump through the pile tube pile lining;
(7) the fixed back of slurries and aggregate pile and penetrating in the pile peripheral earth is full of the inner cavity of pile tube simultaneously.
Advantage of the present invention and effect are:
Concrete tubular pile can adopt prestressed high-strength concrete pile, and strength of the mixing pile can reach C80 even higher, so the pile foundation supporting capacity is high behind the pile, can be used as building pile foundation; Behind the hollow strength core slurry bonded dispersed body material stake pile, after discrete material adopts the cement grout gluing, with original discrete material mutually specific strength improve greatly; Slurries except that in the stake hole with the fixed pile of aggregate, also part is infiltrated the soil body, improves the character of pile peripheral earth, has therefore improved the side friction of pile foundation greatly; Material of body of a pile can for refuses such as rubble, fragment of brick or slag as aggregate (discrete material), can effectively protect environment, reduce construction cost; Discrete material is after the slurries gluing is solidified, and intensity is significantly improved, and forms the rigidity pile body; Adopt pile tube as grouting channel dexterously, grouting back pile tube is stayed in the slurry solid, need not extract, so construction technology is simple more efficient; Construction friction, noiselessness.The present invention be a kind of concrete tubular pile that adopts as grouting pipe and introduce the soft base processing method that slurry injection technique adds bonded dispersed body material, expanded diameter is 500～700 mm, long the reaching more than 30 m of stake.
In a word, construction technology of the present invention is clear, and speed of application is fast, and pile-forming effect is good, and bearing capacity is high, and cost is low, and makes full use of resource, protection environment, reaches effect in energy saving and environmental protection.
Be described in detail below in conjunction with the accompanying drawing specific embodiments of the invention.Protection scope of the present invention is not exceeded with the specific embodiment, but is limited claim.
Description of drawings
The hollow strength core of Fig. 1 the present invention slurry bonded dispersed body material stake sketch map;
A-A position vertical view among Fig. 2 Fig. 1 of the present invention;
Fig. 3 job practices sketch map of the present invention, (a) is pore-forming among the figure; (b) for putting into pile tube; (c) be clear water hole flushing after seal cover being installed and being connected grouting pump; (d) for dropping into discrete material; (e) be slip casting; (f) for removing the seal cover pile;
Fig. 4 pile tube screwed joint of the present invention sketch map.
Among the figure: 1 is prefabricated tubular pile, and 2 is slurry bonded dispersed body material, and 3 is the slurries diffusion region, and 4 is slurries, and 5 is injected hole, and 6 is screwed joint.
The specific embodiment
Like Fig. 1, shown in 2 and 3; The stake of a kind of hollow strength core slurry bonded dispersed body material; Be made up of prefabricated tubular pile (1), slurry bonded dispersed body material (2) and slurries diffusion region (3), prefabricated tubular pile (1) inside is full of slurries (4), and prefabricated tubular pile (1) pile lining leaves injected hole (5).The present invention forms the pile body diameter at 500-700 mm, and adopting prefabricated tubular pile (1) diameter is 200-300 mm.
The job practices of a kind of hollow strength core slurry bonded dispersed body material stake, its construction sequence is:
The first step, pore-forming.The pore-forming of the solid stake of slurry requires basically identical with the pore forming process of general bored pile.Generally use the rig pore-forming, make the slurry retaining wall naturally, under the situation that is difficult for keeping at hole wall, adopt manual work to make the slurry retaining wall.In practical applications, adopt bentonite to add alkali and carry out manual work and make the slurry retaining wall, the specific gravity control of mud is in certain scope.
In second step, transfer prefabricated tubular pile (1).Prefabricated tubular pile (1) is generally prestressed concrete pipe pile, and the spacing of 0.2 ~ 0.5 m of on its pile lining, whenever being separated by is provided with one group of injected hole (5), and interlaced arrangement; See from the pile lining side to be quincuncial arrangement, each cross section is provided with 2 or 2 above injected holes (5), and each injected hole (5) is evenly arranged on cross section; If arrange two, symmetric arrangement then is if arrange three; Then every hole is 120 ° of central angles apart, and the like.The diameter of injected hole (5) is 0.5 ~ 2 cm.Prefabricated tubular pile (1) can be 1, also can many, and it is long and decide to look stake, if many, the jointing between two piles preferably adopts screwed joint (6) connection of being made up of the male and female mouth (like Fig. 4), also can adopt welding connecting mode to fix.Multistage prefabricated tubular pile (1) can be put into after one section one section connection.
In the 3rd step, seal cover is installed and is connected slurry filling machine.Seal cover can adopt steel to make, and its diameter equates that with prefabricated tubular pile (1) external diameter the contact surface at seal cover bottom and prefabricated tubular pile (1) top is provided with rubber ring, and rubber ring fixedly sticks on seal cover.On the stirrup of prefabricated tubular pile (1) top, the threaded shank hole is set, bolt hole also is set, adopt bolt that seal cover is fixed on prefabricated tubular pile (1) end face in the seal cover relevant position.Have hole in the middle of the seal cover, and the connection flexible pipe is communicated with grouting pump.
The 4th step, the clear water hole flushing.By the pressure of grouting pump clear water is injected hole and clean hole.
In the 5th step, throw in discrete material.Building wastes such as rubble, fragment of brick, slag etc. are directly dropped in the stake hole.Be that aggregate limit hole flushing is thrown on the limit in throwing in the aggregate process.In throwing in the process of aggregate, cause the hole of collapsing for preventing aggregate collision hole wall, the special use guider that feeds intake is set guides aggregate, its effect is to prevent that other foreign material from falling into boring and aggregate is vertically fallen at the bottom of the hole.
The 6th step, slip casting.Open grouting pump, the then cavity of slurries in the middle of flexible pipe gets into prefabricated tubular pile (1), and process injected hole (5) enters into discrete material, makes the fixed formation slurry bonded dispersed body material of discrete material (2).Slurries infiltrate pile peripheral earth formation slurries diffusion regions (3) simultaneously, and prefabricated tubular pile (1) inside is full of slurries (4) simultaneously.The slurries parameter mainly comprises the match ratio of slurries, water/binder ratio.The slip casting of the solid stake of slurry at first will make slurries riddle the space of aggregate in the hole, so that fixed pile.Secondly a part of slurries soil body diffusion is towards periphery carried out grouting and reinforcing to pile peripheral earth, improves the intensity of natural ground soil.Can control the slip casting process with grouting amount.
In the 7th step, remove the seal cover pile.
Claims (4)
1. hollow strength core slurry bonded dispersed body material stake; Its technical characterictic is: the pile body periphery is the slurry bonded dispersed body material stake; The pile body center is the minor diameter prefabricated concrete pipe pile; The prefabricated concrete pipe pile pile lining leaves injected hole, and slurries get into discrete material through hole in the middle of the hollow concrete pile and injected hole; The periphery discrete material is frozen into integral body through the cement paste gluing; Slurries infiltrate pile peripheral earth under the grouting pressure effect, improve all native intensity of stake; Slurries fill up the hole in the middle of the concrete pile simultaneously; Described prefabricated concrete pipe pile external diameter is 200 ~ 300 mm, and wall thickness is 50 ~ 100 mm, whenever leaves injected hole at a distance from 0.2 ~ 0.5 m on the pile lining longitudinal section, and injected hole adopts quincunx being interspersed; When stake was long, prefabricated tubular pile adopted multistage to be formed by connecting, and the connected mode preferred bolt connects.
2. a kind of hollow strength core slurry bonded dispersed body material according to claim 1 stake is characterized in that: seal cover is installed at the prefabricated concrete pipe pile top.
3. a kind of hollow strength core slurry bonded dispersed body material according to claim 1 stake is characterized in that: the discrete material that pile body is filled can be rubble, sand, also can be building pigment rubbish or discarded slag.
4. the job practices of a kind of hollow strength core slurry bonded dispersed body material according to claim 1 stake comprises following technical step:
(1) rig gets into ground to projected depth pile hole, and stake is adopted mud off in the hole;
(2) in the stake hole, put into the minor diameter prefabricated concrete pipe pile that pile lining leaves injected hole, when pile tube is multistage, adopts bolt to connect back one section one section and put into;
(3) seal cover is installed at the pile tube top, seal cover is connected with grouting pump through flexible pipe;
(4) hole through the pile tube pile lining injects the clear water hole flushing;
(5) in the stake hole, drop into discrete material;
(6) in the stake hole, inject slurries by the hole of grouting pump through the pile tube pile lining;
(7) the fixed back of slurries and aggregate pile and penetrating in the pile peripheral earth is full of the inner cavity of pile tube simultaneously.
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| CN201110341205.2A CN102505684B (en) | 2011-11-02 | 2011-11-02 | Hollow stiffness-core slurry-solidified discrete material pile and construction method thereof |
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| CN102505684B CN102505684B (en) | 2014-09-10 |
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| CN104762961A (en) * | 2015-04-21 | 2015-07-08 | 福州大学 | Ultra-high performance concrete and common concrete combined pile and construction method thereof |
| CN105064332A (en) * | 2015-07-14 | 2015-11-18 | 王继忠 | Construction method for bearing base piles of square pile bodies |
| CN106545008A (en) * | 2015-09-17 | 2017-03-29 | 江苏远卓地下工程技术有限公司 | A kind of cast-in-situ bored pile pile making method |
| CN106592570A (en) * | 2016-12-02 | 2017-04-26 | 中冶沈勘工程技术有限公司 | Foundation treatment process using pre-fabricated compact type iron tailing reinforced bodies |
| CN106638579A (en) * | 2016-10-17 | 2017-05-10 | 重庆大学 | Construction method of coral sand foundation expanding cement mortar injection pile |
| CN106703024A (en) * | 2017-01-18 | 2017-05-24 | 安徽省经工建设集团有限公司 | Construction technique for composite pile formed through broken stone consolidation by slurry |
| CN107059791A (en) * | 2017-05-24 | 2017-08-18 | 山东大学 | A kind of slag core concrete is for anti-stone and preparation method |
| CN107447754A (en) * | 2017-08-24 | 2017-12-08 | 天津港航工程有限公司 | The new plant stake technique of prefabricated tubular pile and the pile body formed |
| CN108978630A (en) * | 2018-09-29 | 2018-12-11 | 上海勘察设计研究院(集团)有限公司 | A kind of dual-purpose composite pile device of the pumping grouting of band rigidity tubing and construction method |
| CN109750670A (en) * | 2017-11-04 | 2019-05-14 | 重庆第二师范学院 | A kind of reinforcing of rich water boulder bed Deep Foundation Pit bottom mini-valve tube and construction technology |
| CN110004907A (en) * | 2019-03-27 | 2019-07-12 | 河海大学 | Miniature steel pipe pile-immersed tube sand-gravel pile joint foundation stabilization construction method and its structure |
| CN110485453A (en) * | 2019-09-07 | 2019-11-22 | 北京华昊水利水电工程有限责任公司 | A kind of Pile-supported stand foundation structure and its construction method |
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| CN104762961B (en) * | 2015-04-21 | 2016-03-30 | 福州大学 | A kind of ultra-high performance concrete and ordinary concrete compound pile and construction method thereof |
| CN104762961A (en) * | 2015-04-21 | 2015-07-08 | 福州大学 | Ultra-high performance concrete and common concrete combined pile and construction method thereof |
| CN105064332A (en) * | 2015-07-14 | 2015-11-18 | 王继忠 | Construction method for bearing base piles of square pile bodies |
| CN106545008A (en) * | 2015-09-17 | 2017-03-29 | 江苏远卓地下工程技术有限公司 | A kind of cast-in-situ bored pile pile making method |
| CN106638579A (en) * | 2016-10-17 | 2017-05-10 | 重庆大学 | Construction method of coral sand foundation expanding cement mortar injection pile |
| CN106592570B (en) * | 2016-12-02 | 2019-02-15 | 中冶沈勘工程技术有限公司 | A kind of basement process technique using prefabricated compacted sections tailings reinforcing body |
| CN106592570A (en) * | 2016-12-02 | 2017-04-26 | 中冶沈勘工程技术有限公司 | Foundation treatment process using pre-fabricated compact type iron tailing reinforced bodies |
| CN106703024B (en) * | 2017-01-18 | 2020-02-28 | 安徽省经工建设集团有限公司 | Construction process of slurry-solidified gravel composite pile |
| CN106703024A (en) * | 2017-01-18 | 2017-05-24 | 安徽省经工建设集团有限公司 | Construction technique for composite pile formed through broken stone consolidation by slurry |
| CN107059791A (en) * | 2017-05-24 | 2017-08-18 | 山东大学 | A kind of slag core concrete is for anti-stone and preparation method |
| CN107447754A (en) * | 2017-08-24 | 2017-12-08 | 天津港航工程有限公司 | The new plant stake technique of prefabricated tubular pile and the pile body formed |
| CN109750670A (en) * | 2017-11-04 | 2019-05-14 | 重庆第二师范学院 | A kind of reinforcing of rich water boulder bed Deep Foundation Pit bottom mini-valve tube and construction technology |
| CN108978630A (en) * | 2018-09-29 | 2018-12-11 | 上海勘察设计研究院(集团)有限公司 | A kind of dual-purpose composite pile device of the pumping grouting of band rigidity tubing and construction method |
| CN110004907A (en) * | 2019-03-27 | 2019-07-12 | 河海大学 | Miniature steel pipe pile-immersed tube sand-gravel pile joint foundation stabilization construction method and its structure |
| CN112227356A (en) * | 2019-07-15 | 2021-01-15 | 河北建设勘察研究院有限公司 | Gravel grouting steel pipe pile and preparation method thereof |
| CN110485453A (en) * | 2019-09-07 | 2019-11-22 | 北京华昊水利水电工程有限责任公司 | A kind of Pile-supported stand foundation structure and its construction method |
| CN111074883A (en) * | 2020-02-25 | 2020-04-28 | 周同和 | Post-grouting permeable concrete pipe pile and construction method thereof |
| CN113293754A (en) * | 2021-06-04 | 2021-08-24 | 华中科技大学 | Slurry-solidified gravel-soil pile suitable for under-solidified soft soil foundation and reinforcing method |
| CN113832956A (en) * | 2021-11-02 | 2021-12-24 | 上海斐晟企业管理有限公司 | Pile end grouting device and using method thereof |
| CN114703842A (en) * | 2022-03-30 | 2022-07-05 | 中国人民解放军91053部队 | Coral sand foundation drilling type prefabricated hollow pipe pile and construction method |
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