CN106638579A - Construction method of coral sand foundation expanding cement mortar injection pile - Google Patents
Construction method of coral sand foundation expanding cement mortar injection pile Download PDFInfo
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- CN106638579A CN106638579A CN201610903782.9A CN201610903782A CN106638579A CN 106638579 A CN106638579 A CN 106638579A CN 201610903782 A CN201610903782 A CN 201610903782A CN 106638579 A CN106638579 A CN 106638579A
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- pile
- cement mortar
- grouting
- coral sand
- discrete material
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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
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D2250/00—Production methods
- E02D2250/0023—Cast, i.e. in situ or in a mold or other formwork
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- Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Piles And Underground Anchors (AREA)
Abstract
The invention discloses a construction method of a coral sand foundation expanding cement mortar injection pile. A mortar solid discrete material pile is arranged on the periphery of a pile body, a small-diameter mortar injection pipe is arranged in the center of the pile body, and expanding mortar enters a discrete material through the mortar injection pipe; the peripheral discrete material is glued and solidified into a whole through expanding cement mortar; meanwhile, the expanding cement mortar enters a coral sand foundation under the action of mortar injection pressure, and the character of the expanding cement mortar can be improved; and after the expanding cement mortar injection pile is formed, the pile body expands, a soil body around the pile can be subjected to compaction, the character of soil around the pile is improved, and the strength of the soil around the pile is improved. According to the construction method, a construction process is clear, the construction speed is high, the pile forming effect is good, bearing force is high, the manufacturing cost is low, the geological resource of calcareous sand is fully utilized, the environment is protected, and energy saving and environment protection are achieved. The construction method has positive effects on reclamation project work of the large-area coral sand foundation in the South China Sea, the problems about pile forming and the like on a calcareous sand foundation can be solved well, and therefore civil purposes, military purposes and multiple other purposes are met.
Description
Technical field
The invention belongs to civil construction project technical field, more particularly to a kind of coral sand foundation expansion cement mortar slip casting
Stake and its construction method.
Background technology
In the engineering constructions such as road, harbour, bridge, pile foundation is extensive.Vertical Bearing Capacity of Pile Foundation is by shaft resistance
Power and end resistance two parts are constituted.How to improve unit materials rate of utilization of strength, carry while construction material consumption is saved
High bearing capacity of pile foundation, is research worker one of important topic of concern for a long time.Meanwhile, with projecting increasingly for South China Sea, such as
The artificial construction activity such as reclaiming land around sea is where carried out on the distinctive loose coral sand in the South Sea, heat of concern is increasingly becoming
Point.
Calcareous sand, also known as coral sand, are a kind of special medias of marine organisms remains formation, high with organic principle, by force
Degree is relatively low, the features such as being easily broken.Substantial amounts of test and case history are shown, are existed based on the pile foundation experience of conventional foundation material
It is inapplicable in malm, because calcareous sand will occur grain breakage under the stress of very little, therefore whether squeezes into
Stake or bored concrete pile, can all disturb calcareous sand foundation soil, cause the calcareous sand grain breakage of stake week, stress relaxation, stake side after pile
Frictional resistance and end resistance all can be weakened, and reduce bearing capacity of pile foundation.For example, static pressed pile and Driven Piles can cause the big of calcareous sand
Amount is broken, further reduces foundation bearing capacity.Vibrator pipe sinking cast-in-place pile is only applicable to soft soil foundation.Cast-in-situ bored pile is more closed
It is suitable, but still there is a problem of that calcareous sand is crushed causes intensity relatively low.Therefore, how intensity is formed on calcareous sand ground higher
Stake have become the great problem in one, ocean ground field.
At present the discrete material pile such as broken stone pile, sand pile is a kind of pile foundation type commonly used in engineering, but discrete material pile sheet
The intensity of body is relatively low, can only undertake less load.There are a variety of methods to improve strength of the mixing pile, such as using swelling water silt particle
Slurry can cause the volume increase of stake after pile, so as to make full use of the soil compaction effect of stake so that pile peripheral earth is compacted, can be with
Further improve the bearing capacity of stake.So, on the basis of existing piling technique, it is considered to can be taken using expansive cement mortar
Obtain more preferable effect.
The content of the invention
It is an object of the invention to overcome drawbacks described above, there is provided a kind of coral sand foundation expansion cement mortar grouting pile and its
Construction method.
The technical scheme adopted to realize the object of the invention is a kind of such, coral sand foundation expansion cement mortar note
The construction method of slurry stake, it is characterised in that comprise the following steps:
1) rig is located in coral sand ground top, to the internal drilling of coral sand ground to projected depth, forms stake holes；It is described
When the hole wall of stake holes is unstable, casing is taken to carry out retaining wall；
2) it is put into steel reinforcement cage in the stake holes；
3) in the center Laying injection pipe of stake holes, the side wall of the Grouting Pipe has some holes；
4) discrete material is put into into stake holes；
5) expansive cement mortar serosity is injected from grouting pump to Grouting Pipe；
6) expansive cement mortar is injected in stake holes from the bottom mouth of pipe and hole of Grouting Pipe；Expansive cement mortar and step 4)
The cementing solidification of discrete material of input is integral；
7) after expansive cement mortar bored pile piling, pile body expansion forms coral sand foundation expansion cement mortar grouting pile.
By above-mentioned construction method, a kind of coral sand foundation expansion cement mortar grouting pile is formed, it is characterised in that：Pile body
Center is Grouting Pipe, has steel reinforcement cage in the stake holes that Grouting Pipe is located；Expansive cement mortar enters a periphery prose style free from parallelism by Grouting Pipe
Material, the periphery discrete material is integral by the cementing solidification of expanded sand cement mortar, forms the slurry bonded dispersed body material of pile body periphery
Material stake；Meanwhile, expansive cement mortar enters coral sand ground under grouting pressure effect, forms serosity diffusion region.
Further, described Grouting Pipe external diameter is 20～100mm, and wall thickness is 5～10mm.
Further, the discrete material is selected from rubble, building pigment rubbish.
Advantages of the present invention and effect are：
The discrete material of the expansive cement mortar grouting pile is cemented to whole in the presence of expansive cement mortar with steel reinforcement cage
Body, can significantly increase intensity；Pile peripheral earth because expansive cement mortar injection and expansive cement mortar grouting pile pile after
The crowd in-out effects of expansion and improve intensity, the bearing capacity of ground can be significantly improved；Grouting Pipe can as needed select length, so as to
Form long stake.The present invention is a kind of employing grouting pipe and introduces the method for processing foundation of slurry injection technique plus bonded dispersed body material, into
A diameter of 500～the 1000mm of stake, stake is long up to more than 35m.
Construction technology of the present invention is clear, and speed of application is fast, and pile-forming effect is good, high capacity, low cost, and makes full use of calcium
The geological resource of matter sand, environmental protection, energy-conserving and environment-protective.Reclaiming land around sea work to the large-area coral sand ground in the South Sea has actively
Effect, the problems such as can preferably solve pile on calcareous sand ground, so as to meet the multiple uses such as civilian and military.
Description of the drawings
Fig. 1 coral sand foundation expansion cement mortar grouting pile schematic diagrams of the present invention；
A-A positions top view in Fig. 2 Fig. 1 of the present invention；
Fig. 3 construction method schematic diagrams of the present invention, (a) is pore-forming in figure；B () is to be put into steel reinforcement cage；(c) Laying injection pipe；
D () is input discrete material；E () is slip casting；(f) pile；
In figure：1 is Grouting Pipe, and 2 is slurry bonded dispersed body material, and 3 is serosity diffusion region, and 4 is expanding cement serosity, and 5 is reinforcing bar
Cage.
Specific embodiment
With reference to embodiment, the invention will be further described, but should not be construed above-mentioned subject area of the invention only
It is limited to following embodiments.Without departing from the idea case in the present invention described above, according to ordinary skill knowledge and used
With means, various replacements and change are made, all should be included within the scope of the present invention.
A kind of construction method of coral sand foundation expansion cement mortar grouting pile, comprises the following steps:
1) pore-forming：Rig is located in coral sand ground top, to the internal drilling of coral sand ground to projected depth, forms stake
Hole；When the hole wall of the stake holes is unstable, casing is taken to carry out retaining wall；(a parts of Fig. 3).What deserves to be explained is, grouting pile into
Hole is basically identical with the pore forming process of general cast-in-situ bored pile.It is general to use rig pore-forming, natural pulping retaining wall to be difficult to protect in hole wall
In the case of holding, using artificial pulping retaining wall.Alkali is added to carry out artificial pulping retaining wall using bentonite in engineer applied, mud
Specific gravity control is in certain scope.
2) steel reinforcement cage 5 (the b parts of Fig. 3) is put in the stake holes；
3) in the center Laying injection pipe of stake holes, the side wall of the Grouting Pipe has some holes；(the c portions of Fig. 3
Point)
4) discrete material (the d parts of Fig. 3) is put into into stake holes；Discrete material builds rubbish selected from rubble or fragment of brick etc.
Rubbish, during the stake holes being drilled can be direct plungeed into.The hole flushing when aggregate is thrown in is being carried out during throwing in aggregate.Throw in
During aggregate, to prevent aggregate collision hole wall from causing collapse hole, can arrange and feed intake guider to guide aggregate, its effect is
Prevent other debris from falling in drilling and make aggregate vertically fall into bottom hole.
5) from grouting pump to Grouting Pipe injection expansive cement mortar serosity (the e parts of Fig. 3)；In embodiment, slip casting is opened
Pump, the cavity that expansive cement mortar serosity Jing flexible pipes are entered in the middle of Grouting Pipe (1), and enter into a prose style free from parallelism through end injected hole
In material, become injection side and extract.
6) expansive cement mortar is injected in stake holes from the bottom mouth of pipe and hole of Grouting Pipe；Expansive cement mortar and step 4)
The discrete material of input is cementing to solidify integral (the f parts of Fig. 3)；Slip casting process first has to make dilatant slurry riddle hole internal skeleton
The space of material so as to and steel reinforcement cage consolidates pile.Secondly, a part of serosity spreads to surrounding soil, and pile peripheral earth is noted
Slurry is reinforced, and improves the intensity of subsoil soil.Slip casting process can be controlled with grouting amount.
7) after expansive cement mortar bored pile piling, pile body expansion is extracted completely after Grouting Pipe, at the termination of stake
Reason, forms coral sand foundation expansion cement mortar grouting pile.
As illustrated in fig. 1 and 2, its pile body center is Grouting Pipe to the coral sand foundation expansion cement mortar grouting pile of the present embodiment
1, the external diameter of described Grouting Pipe is 20～100mm, and wall thickness is 5～10mm.There is steel reinforcement cage 5 in the stake holes that Grouting Pipe 1 is located；
Expansive cement mortar 4 enters periphery discrete material by Grouting Pipe 1, and the periphery discrete material is cementing by expanded sand cement mortar
Solidification is integral, forms the slurry-solidified discrete material pile 2 of pile body periphery；Meanwhile, expansive cement mortar enters under grouting pressure effect
Enter coral sand ground, form serosity diffusion region 3；After expansive cement mortar bored pile piling, pile body expansion so that pile peripheral earth is squeezed
It is close, improve the property of soil around pile, improve its intensity.
Claims (4)
1. a kind of construction method of coral sand foundation expansion cement mortar grouting pile, it is characterised in that comprise the following steps:
1) rig is located in coral sand ground top, to the internal drilling of coral sand ground to projected depth, forms stake holes；The stake holes
Hole wall it is unstable when, take casing to carry out retaining wall；
2) it is put into steel reinforcement cage in the stake holes；
3) in the center Laying injection pipe of stake holes, the side wall of the Grouting Pipe has some holes；
4) discrete material is put into into stake holes；
5) expansive cement mortar serosity is injected from grouting pump to Grouting Pipe；
6) expansive cement mortar is injected in stake holes from the bottom mouth of pipe and hole of Grouting Pipe；Expansive cement mortar and step 4) input
Discrete material it is cementing solidification it is integral；
7) after expansive cement mortar bored pile piling, pile body expansion forms coral sand foundation expansion cement mortar grouting pile.
2. a kind of coral sand foundation expansion cement mortar grouting pile according to claim 1, it is characterised in that：Pile body center
There is steel reinforcement cage (5) in the stake holes being located for Grouting Pipe (1), Grouting Pipe (1)；Expansive cement mortar (4) is entered by Grouting Pipe (1)
Enter periphery discrete material, the periphery discrete material is integral by the cementing solidification of expanded sand cement mortar, forms pile body periphery
Slurry-solidified discrete material pile (2)；Meanwhile, expansive cement mortar enters coral sand ground under grouting pressure effect, forms serosity and expands
Scattered area (3).
3. a kind of coral sand foundation expansion cement mortar grouting pile according to claim 1, it is characterised in that：Described note
Slurry pipe external diameter is 20～100mm, and wall thickness is 5～10mm.
4. a kind of coral sand foundation expansion cement mortar grouting pile according to claim 1, it is characterised in that：The prose style free from parallelism
Material is selected from rubble, building pigment rubbish.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610903782.9A CN106638579A (en) | 2016-10-17 | 2016-10-17 | Construction method of coral sand foundation expanding cement mortar injection pile |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610903782.9A CN106638579A (en) | 2016-10-17 | 2016-10-17 | Construction method of coral sand foundation expanding cement mortar injection pile |
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| CN106638579A true CN106638579A (en) | 2017-05-10 |
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| CN201610903782.9A Pending CN106638579A (en) | 2016-10-17 | 2016-10-17 | Construction method of coral sand foundation expanding cement mortar injection pile |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110534008A (en) * | 2019-08-21 | 2019-12-03 | 三峡大学 | The visualization device and method of the compacted process of coral sand densification in a kind of simulation sea reclamation |
| CN111042125A (en) * | 2019-12-12 | 2020-04-21 | 三峡大学 | Double-layer pile casing device for limiting expansion of head of cast-in-place pile and construction method |
| CN111379253A (en) * | 2019-10-25 | 2020-07-07 | 重庆大学 | Construction method for high-speed railway expanded cement slurry post-grouting discrete material pile composite foundation |
| CN113638408A (en) * | 2021-08-24 | 2021-11-12 | 三峡大学 | Construction method for small-size expansion cast-in-place pile body formed by suction in coral sand |
| CN115726348A (en) * | 2022-11-21 | 2023-03-03 | 三峡大学 | Construction method of double-casing pipe-expanding anchor rod-cast-in-place pile |
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| JPS5751332A (en) * | 1980-09-13 | 1982-03-26 | Sanshin Kogyo Kk | Construction of ready-made pile |
| CN1482307A (en) * | 2002-09-10 | 2004-03-17 | 周同和 | Sand concrete free small pile foundation consolidation process by stone throwing and squeezing |
| CN101487254A (en) * | 2009-02-13 | 2009-07-22 | 郝东明 | Construction method of vibrating immersed tube gravel slip-casting pile |
| CN101532290A (en) * | 2009-02-25 | 2009-09-16 | 河海大学 | Granule grouting pile of ripple plastic sleeve with hole for strengthening soft soil foundation and strengthening method |
| CN102505684A (en) * | 2011-11-02 | 2012-06-20 | 河海大学 | Hollow stiffness-core slurry-solidified discrete material pile and construction method thereof |
| CN102767173A (en) * | 2012-07-09 | 2012-11-07 | 河海大学 | High polymer material slurry filled discrete material pile composite foundation and construction method thereof |
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2016
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Patent Citations (6)
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|---|---|---|---|---|
| JPS5751332A (en) * | 1980-09-13 | 1982-03-26 | Sanshin Kogyo Kk | Construction of ready-made pile |
| CN1482307A (en) * | 2002-09-10 | 2004-03-17 | 周同和 | Sand concrete free small pile foundation consolidation process by stone throwing and squeezing |
| CN101487254A (en) * | 2009-02-13 | 2009-07-22 | 郝东明 | Construction method of vibrating immersed tube gravel slip-casting pile |
| CN101532290A (en) * | 2009-02-25 | 2009-09-16 | 河海大学 | Granule grouting pile of ripple plastic sleeve with hole for strengthening soft soil foundation and strengthening method |
| CN102505684A (en) * | 2011-11-02 | 2012-06-20 | 河海大学 | Hollow stiffness-core slurry-solidified discrete material pile and construction method thereof |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110534008A (en) * | 2019-08-21 | 2019-12-03 | 三峡大学 | The visualization device and method of the compacted process of coral sand densification in a kind of simulation sea reclamation |
| CN110534008B (en) * | 2019-08-21 | 2021-06-04 | 三峡大学 | Visual device and method for simulating compaction and compaction process of coral sand in sea reclamation |
| CN111379253A (en) * | 2019-10-25 | 2020-07-07 | 重庆大学 | Construction method for high-speed railway expanded cement slurry post-grouting discrete material pile composite foundation |
| CN111042125A (en) * | 2019-12-12 | 2020-04-21 | 三峡大学 | Double-layer pile casing device for limiting expansion of head of cast-in-place pile and construction method |
| CN113638408A (en) * | 2021-08-24 | 2021-11-12 | 三峡大学 | Construction method for small-size expansion cast-in-place pile body formed by suction in coral sand |
| CN115726348A (en) * | 2022-11-21 | 2023-03-03 | 三峡大学 | Construction method of double-casing pipe-expanding anchor rod-cast-in-place pile |
| CN115726348B (en) * | 2022-11-21 | 2024-04-19 | 三峡大学 | Construction method of double-pile-casing pipe-expanding anchor rod-filling pile |
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