CN105804083A - Grouting pipeline device, conical special-shaped pile and application method thereof - Google Patents
Grouting pipeline device, conical special-shaped pile and application method thereof Download PDFInfo
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- CN105804083A CN105804083A CN201610297065.6A CN201610297065A CN105804083A CN 105804083 A CN105804083 A CN 105804083A CN 201610297065 A CN201610297065 A CN 201610297065A CN 105804083 A CN105804083 A CN 105804083A
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- grouting
- pile
- pipe
- slip casting
- tapered shaped
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D15/00—Handling building or like materials for hydraulic engineering or foundations
- E02D15/02—Handling of bulk concrete specially for foundation or hydraulic engineering purposes
- E02D15/04—Placing concrete in mould-pipes, pile tubes, bore-holes or narrow shafts
-
- 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
-
- 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)
- General Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- Piles And Underground Anchors (AREA)
Abstract
The invention discloses a grouting pipeline device. The grouting pipeline device comprises a longitudinal grouting pipe, an annular pipe, grouting machines, a first arc guide pipe and a second arc guide pipe; the longitudinal grouting pipe is arranged on the inner side of the annular pipe in the axial direction of a pile body, and a grouting port is formed in the top of the pile; the annular pipe is perpendicular to the axial direction of the pile body, and is communicated with the longitudinal grouting pipe through the first arc guide pipe; the grouting machines are symmetrically arranged in the center positions of the side surfaces of the pile in the peripheral annular direction of the pile; one side is communicated with the annular pipe through the second arc guide pipe; and the other side is communicated with the external of the pile body. The invention further discloses a conical special-shaped pile for prefabricating the grouting pipeline device and an application method thereof. The grouting pipeline device performs the targeted grouting section setting, grouting scheme selection and parameter design according to different engineering environments and specific working conditions, has such advantages as safety, reliability, high adaptability and flexibility, economy and environmental protection, can effectively compensate the pile side friction resistance of the conical special-shaped pile, reduces the difficulty of secondary construction for improving the bearing capacity of the special-shaped pile, and saves the construction cost.
Description
Technical field
The invention belongs to Geotechnical Engineering field, relate to prefabricated grouting pipeline device and grouting method in tapered shaped pile.
Background technology
Bearing capacity and the deformation requirements of pile foundation are improved by the development of modern architecture industry day by day, tapered shaped pile is by changing pile body longitudinal section shape, adding unflatness and the roughness of a Soil Interface, make pile body bearing capacity significantly improve, the application in engineering practice is more and more extensive.
On the other hand, the impact of engineering or Other Engineering owing to wearing the facility such as existing building, bridge under tunnel in reality, can to the pile foundation of existing building and stake week region produce harmful effect.Underground Engineering Excavation meeting disturbance pile peripheral earth, changes pile peripheral earth mechanical state, reduces pile foundation side friction and bearing capacity, the sedimentation of aggravation existing pile foundation plinth and deformation, the safety of existing building is impacted.Owing to pile foundation mostly is underground engineering, quantities and engineering difficulty to the transformation of existing pile foundation plinth are bigger；And in pile peripheral earth, again squeeze into Grouting Pipe carry out grouting and reinforcing, its technology requires big with control difficulty, high material consumption, so the existing shaped pile that the pile foundation bearing capacity caused for pile peripheral earth disturbance declines is reinforced, become wear under underground engineering build, structures region time the technical barrier that must solve.
Application number be the Invention Announce of 201410396574.5 a kind of multiple holes grouting pipe shaped pile and pile making method.This invention is by high-pressure slip-casting, and the Seed harvest formed after making serosity hardening is collectively forming multiple holes grouting pipe shaped pile with slip casting pipe pile, reinforced soft soil ground can be played remarkable result.But the method is mainly for Soft foundation treatment, not for the problem improving existing shaped pile bearing capacity, it is impossible to play the effect compensating existing shaped pile pile side friction under pile peripheral earth disturbance premise.
The patent No. be 201020700179.9 utility model disclose a kind of prestressing steel pipe concrete pipe pile.The layout of this pile-type structure or presstressed reinforcing steel by improving stake improves concrete tubular pile performance, if but pile body runs into pile peripheral earth disturbance causes how pile side friction being carried out effective compensation when pile side friction declines after not considering pile, it is impossible to the problem solving to improve existing pile foundation bearing capacity.
For solve to wear under engineering build, structures time the existing tapered shaped pile pile peripheral earth of disturbance, the problem causing pile side friction and pile foundation bearing capacity to decline, research and develop a kind of compensate prefabricated grouting pipeline device and grouting method in the tapered shaped pile of side friction formula become objectively in the urgent need to.
Summary of the invention
The problem that present invention aims to the tapered shaped pile pile side friction decline that pile peripheral earth disturbance causes, it is provided that prefabricated grouting pipeline device and grouting method in a kind of compensation tapered shaped pile of side friction formula.
For reaching above-mentioned purpose, the solution of the present invention is:
A kind of compensation tapered shaped pile of side friction formula, is the built-in slip casting pipe road device when tapered shaped pile is prefabricated, and grouting pipeline device squeezes into the soil body with tapered shaped pile.A set of grouting pipeline device is made up of longitudinal Grouting Pipe, ring pipe and slurry casting machine, wherein longitudinal Grouting Pipe is axially set in inside ring pipe along pile body and sets grouting port on stake top, ring pipe be perpendicular to pile body axially arranged and by curved catheter with longitudinal direction Grouting Pipe connect, slurry casting machine is check valve-type structure, along stake chow ring to being symmetricly set in a center side position, side is connected with ring pipe by curved catheter, and opposite side connects with the pile body external world, and each ring pipe generally connects 4 slurry casting machines.
Further, longitudinal Grouting Pipe should adopt high-quality steel pipe, ring pipe and curved catheter should adopt pvc pipe.
Further, longitudinal Grouting Pipe and ring pipe are answered colligation to fix or are welded on tapered shaped pile bar-mat reinforcement and put more energy on muscle, outside ring pipe, concrete thickness is not preferably less than 30mm, grouting pipeline internal diameter is advisable with 20～30mm, require between pipeline that smooth-going connects, ensure serosity mobile performance in pipeline, it is to avoid plugging during slip casting.
Further, the corresponding annular slip casting section of the slurry casting machine of ring pipe in a set of grouting pipeline device and connection thereof, a piece tapered shaped pile can arrange many set grouting pipeline devices thus forming multiple annular slip casting sections of different level, slip casting section carries out specific aim layout in combinations with the distribution of Pile side soil layer and soil mass property, wherein first road slip casting section should push up below 5m in stake, and adjacent slip casting section spacing is preferably 5～9m.
A kind of compensation tapered shaped pile grouting method of side friction formula, refers to when pile peripheral earth disturbance causes that tapered shaped pile pile side friction declines, and available grouting pipeline device carries out a side grouting under pressure.First dredge grouting pipeline with water under high pressure before slip casting, form the slip casting path between grouting pipeline and pile peripheral earth；Then carrying out a side grouting under pressure, single slip casting section first passes through grouting port to press-in serosity in longitudinal Grouting Pipe when slip casting, and serosity is diffused into surrounding soil by slurry casting machine after flowing through ring pipe and forms Seed harvest in stake week, thus improving pile side friction.
Further, grouting sequence should interval slip casting from top to bottom, each section slip casting is not preferably less than 1h interval time, plugging when will avoid slip casting, it is ensured that serosity can be sufficient filling with and be trapped within the scope of a side useful space.
Further, grouting serous fluid should adopt cement list liquid to starch, it is desirable to good fluidity, and calculus rate is high, can add additive and improve size performance, and slurry water gray scale is determined in combinations with operating mode: for saturated soil, the ratio of mud should between 0.45～0.65；For unsaturated soil, the ratio of mud should between 0.7～0.9；For loose gravelly soil, gravel soil, the ratio of mud should between 0.5～0.6.
Further, to control well during mortar depositing construction the key element such as grouting pressure, flow rate of grouting and strengthen monitoring, grouting pressure is preferably 1.5～4Mpa, and flow rate of grouting is preferably 30～50L/min, grouting program and parameter setting is constantly adjusted, it is ensured that slip casting effect in combinations with concrete operating mode and monitoring information.
When grouting amount reaches designing requirement, slip casting can be stopped；When the monitoring index such as pile body settlement, deformation reaches to control requirement or mortar depositing construction localized ground grout, it is possible to stop slip casting.
Owing to adopting technique scheme, the method have the advantages that
1) tapered shaped pile advantage can be played, pre-buried piping installation can be utilized again to realize slip casting around pile, it is possible to solve tapered shaped pile and cause, owing to pile side friction declines, the problem that pile foundation bearing capacity is not enough.
2) according to different engineering-environments, can carrying out in conjunction with concrete operating mode that slip casting section targetedly is arranged, grouting program selects and parameter designing, adaptability, motility are stronger.
3) present invention is easy to implement, economic and environment-friendly, can improve tapered shaped pile pile side friction deposit, is reduced to the difficulty improving the secondary construction that shaped pile bearing capacity carries out, saves construction cost.
Accompanying drawing explanation
Fig. 1 is grouting pipeline device organigram of the present invention.
Fig. 2 is a kind of tapered shaped pile embodiment organigram of the present invention.
Fig. 3 is an embodiment of the present invention engineering sectional schematic diagram.
Marginal data: 1-longitudinal direction Grouting Pipe；2-ring pipe；3-slurry casting machine；4-grouting port；5-the first curved catheter (the longitudinal Grouting Pipe of connection and ring pipe)；6-the second curved catheter (connection ring pipe and slurry casting machine)；The tapered shaped pile of 7-；8-cushion cap；9-Seed harvest.
Detailed description of the invention
Below in conjunction with accompanying drawing illustrated embodiment, the present invention is further illustrated.
As it is shown in figure 1, a set of grouting pipeline device includes longitudinal Grouting Pipe 1, ring pipe 2 and slurry casting machine 3, longitudinal Grouting Pipe 1 is connected by the first curved catheter 5 with ring pipe 2, and ring pipe 2 and slurry casting machine 3 are connected by the second curved catheter 6.
Fig. 2 is a kind of tapered shaped pile embodiment organigram of the present invention.Generally, slip casting section carries out specific aim layout in combinations with the distribution of Pile side soil layer and soil mass property, and first road slip casting section should push up below 5m in stake, and adjacent slip casting section spacing is preferably 5～9m.The present embodiment is when considering geological conditions in works scope, and tapered shaped pile 7 is pre-buried three set grouting pipeline devices when prefabricated, can form three slip casting sections, and first road slip casting section 5m below stake top, adjacent slip casting section spacing is 6m.
Fig. 2 often overlaps the longitudinal Grouting Pipe 1 in grouting pipeline device be axially set in inside ring pipe 2 along pile body and set grouting port 4 on stake top, ring pipe 2 be perpendicular to pile body axially arranged and by the first curved catheter 5 with longitudinal direction Grouting Pipe 1 connect, slurry casting machine 3 constructs for check valve-type, along stake chow ring to being symmetricly set in a center side position, side is connected with annular 2 pipes by the second curved catheter 6, and opposite side connects with the pile body external world；Each ring pipe generally connects four slurry casting machines.
In the embodiment of the present invention, longitudinal Grouting Pipe 1 adopts high-quality steel pipe；Ring pipe 3 and first, second curved catheter 5,6 adopt pvc pipe, and longitudinal Grouting Pipe 1 and ring pipe 3 colligation when pile body is prefabricated are fixed on tapered shaped pile bar-mat reinforcement and put more energy on muscle.Generally, outside ring pipe, concrete thickness is not preferably less than 30mm, and grouting pipeline internal diameter is advisable with 20～30mm, and outside the present embodiment annular tube, concrete minimum thickness is 50mm, and tubing internal diameter is 30mm.In different embodiments, it is possible to suitably adjusting as the case may be, change various parameter to realize good effect, this does not repeat.
Fig. 3 is an embodiment of the present invention engineering sectional schematic diagram.This embodiment is wear high ferro bridge pier engineering under the road of somewhere, wherein high ferro bridge pier spacing 32m, and cushion cap 8 is of a size of 10m × 5m × 2.5m, is connected with 10 tapered shaped piles 7 of longitudinal variable cross-section below each cushion cap.The stake of tapered shaped pile 7 is long for 22m, and stake end face is 1m × 1m square, and bottom surface is 0.8m × 0.8m square；Owing to pile body is connected above cushion cap, so every longitudinal Grouting Pipe 1 extends to cushion cap surface when cushion cap applies each through fastener for connection and sets grouting port on cushion cap surface, facilitate follow-up slip casting around pile with this.
In the present embodiment, for improving road passage capability, it is necessary to widen existing road, the unloading that excavation produces causes existing tapered shaped pile pile peripheral earth disturbance, causes that pile side friction declines, and causes bridge pier sedimentation and deformation, affects train operation safety.
For compensating pile side friction, improve tapered shaped pile bearing capacity, it is necessary to utilize grouting pipeline device pre-buried in shaped pile to carry out a side grouting under pressure.Specifically comprising the following steps that during mortar depositing construction
(1) design grouting program: serosity adopts cement list liquid slurry, and the ratio of mud is 0.5；Single section grouting amount design load is 0.5t.
(2) first dredge grouting pipeline with water under high pressure before slip casting, form the slip casting path between grouting pipeline and pile peripheral earth；Then carrying out a side grouting under pressure, single slip casting section is when slip casting from grouting port to press-in serosity in longitudinal Grouting Pipe 1, and serosity is diffused into surrounding soil by slurry casting machine 3 after flowing through ring pipe 2 and forms Seed harvest 9 in stake week, thus improving pile side friction.In Fig. 3, the direction of arrow represents serosity flow direction during grouting under pressure.
(3) to control well during mortar depositing construction the key element such as grouting pressure, flow rate of grouting and strengthen monitoring, grouting pressure controls at 1.5～4Mpa, flow rate of grouting controls at 30～50L/min, and constantly adjusts grouting program and parameter setting in conjunction with concrete operating mode and monitoring information, it is ensured that slip casting effect.
(4) when grouting amount reaches designing requirement, slip casting is stopped；When the monitoring index such as pile body settlement, deformation reaches to control requirement or mortar depositing construction localized ground grout, also stop slip casting.
The present invention can significantly improve the contact surface characteristic of existing tapered shaped pile pile body and soil around pile, effective compensation pile side friction, improves existing tapered shaped pile bearing capacity, reduces pile foundation settlement and deformation.
The above-mentioned description to embodiment of the present invention is to be understood that for ease of those skilled in the art and apply the present invention.These embodiments obviously easily can be made various amendment by person skilled in the art, and the General Principle of this explanation is applied in other embodiments without through performing creative labour.Therefore, the invention is not restricted to embodiment here, those skilled in the art's announcement according to the present invention, without departing from the made any amendment of scope, equivalent replacement, improvement etc., should be included within protection scope of the present invention.
Claims (10)
1. a grouting pipeline device, it is characterized in that: include longitudinal Grouting Pipe, ring pipe, slurry casting machine, the first curved catheter and the second curved catheter, described longitudinal Grouting Pipe is axially set in inside ring pipe along pile body and sets grouting port on stake top, described ring pipe be perpendicular to pile body axially arranged and by the first curved catheter with longitudinal direction Grouting Pipe connect, described slurry casting machine is along stake chow ring to being symmetricly set in a center side position, side is connected with described ring pipe by the second curved catheter, and opposite side connects with the pile body external world.
2. grouting pipeline device according to claim 1, it is characterised in that: described slurry casting machine is check valve-type structure；Preferably, on described ring pipe, four slurry casting machines are arranged at interval；Preferably, described longitudinal Grouting Pipe adopts steel pipe, and described ring pipe, first and second curved catheter adopt pvc pipe.
3. the tapered shaped pile of the grouting pipeline device described in a prefabricated claim 1 or 2, it is characterized in that: described tapered shaped pile comprises upper and lower spaced some set grouting pipeline devices, the often corresponding annular slip casting section of slurry casting machine of the ring pipe in set grouting pipeline device and connection thereof, thus forming some annular slip casting sections of different level, slip casting section carries out specific aim layout in conjunction with the distribution of Pile side soil layer and soil mass property；The often each longitudinal Grouting Pipe of the set grouting pipeline device grouting port dispersed placement on stake top.
4. tapered shaped pile according to claim 3, it is characterised in that: wherein first road slip casting section is arranged at stake top below 5m, and adjacent slip casting section spacing is 5～9m；Preferably, described longitudinal Grouting Pipe and ring pipe colligation are fixed or are welded on tapered shaped pile bar-mat reinforcement and put more energy on muscle；Preferably, outside described ring pipe, concrete thickness is not less than 30mm, and grouting pipeline internal diameter is 20～30mm.
5. the using method of the tapered shaped pile described in claim 3 or 4, it is characterized in that: the tapered shaped pile of built-in slip casting pipe road device time prefabricated is squeezed into the soil body, when pile peripheral earth disturbance causes that tapered shaped pile pile side friction declines, utilize grouting pipeline device to stake side grouting under pressure, thus improving pile body and soil around pile contact surface characteristic, compensate side friction, improve pile foundation bearing capacity.
6. the using method of tapered shaped pile according to claim 5, it is characterised in that: first dredge grouting pipeline with water under high pressure before slip casting, form the slip casting path between grouting pipeline and pile peripheral earth；Then carrying out a side grouting under pressure, single slip casting section first passes through grouting port to press-in serosity in longitudinal Grouting Pipe when slip casting, and serosity is diffused into surrounding soil by slurry casting machine after flowing through ring pipe and forms Seed harvest in stake week, thus improving pile side friction.
7. the using method of tapered shaped pile according to claim 5, it is characterized in that: grouting sequence should from top to bottom interval slip casting, each section slip casting is not less than 1h interval time, plugging when will avoid slip casting, it is ensured that serosity can be sufficient filling with and be trapped within the scope of a side useful space.
8. the using method of tapered shaped pile according to claim 5, it is characterised in that: grouting serous fluid adopts cement list liquid slurry, it is desirable to good fluidity, and calculus rate is high, can add additive and improve size performance, and slurry water gray scale is determined in combinations with operating mode；Preferably: for saturated soil, the ratio of mud is between 0.45～0.65；For unsaturated soil, the ratio of mud is between 0.7～0.9；For loose gravelly soil, gravel soil, the ratio of mud is between 0.5～0.6.
9. the using method of tapered shaped pile according to claim 5, it is characterised in that: need during mortar depositing construction control the key element such as grouting pressure, flow rate of grouting well and strengthen monitoring；Preferably, grouting pressure is 1.5～4Mpa, and flow rate of grouting is 30～50L/min, it is necessary to constantly adjust grouting program and parameter setting in conjunction with concrete operating mode and monitoring information, it is ensured that slip casting effect.
10. the using method of tapered shaped pile according to claim 5, it is characterised in that: when grouting amount reaches designing requirement, slip casting can be stopped；When the monitoring index such as pile body settlement, deformation reaches to control requirement or mortar depositing construction localized ground grout, it is possible to stop slip casting.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610297065.6A CN105804083A (en) | 2016-05-06 | 2016-05-06 | Grouting pipeline device, conical special-shaped pile and application method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610297065.6A CN105804083A (en) | 2016-05-06 | 2016-05-06 | Grouting pipeline device, conical special-shaped pile and application method thereof |
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| CN105804083A true CN105804083A (en) | 2016-07-27 |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN107476309A (en) * | 2017-09-06 | 2017-12-15 | 中国建筑第八工程局有限公司 | Ring post-grouting device for bored concrete pile |
| CN111254965A (en) * | 2020-02-10 | 2020-06-09 | 深圳中海建筑有限公司 | Grouting type recycled concrete prefabricated pier foundation and manufacturing method thereof |
| CN112127350A (en) * | 2020-08-19 | 2020-12-25 | 中国港湾工程有限责任公司 | Construction process of marine gravel pile |
| CN114753414A (en) * | 2022-04-13 | 2022-07-15 | 中交三航局第三工程有限公司 | Intelligent anti-scouring device and method for annular grid type fluidized soil steel pipe pile |
| CN115369882A (en) * | 2022-09-05 | 2022-11-22 | 中国建筑第七工程局有限公司 | Post grouting device for cast-in-place pile and construction method |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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| 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 |
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| CN107476309A (en) * | 2017-09-06 | 2017-12-15 | 中国建筑第八工程局有限公司 | Ring post-grouting device for bored concrete pile |
| CN111254965A (en) * | 2020-02-10 | 2020-06-09 | 深圳中海建筑有限公司 | Grouting type recycled concrete prefabricated pier foundation and manufacturing method thereof |
| CN112127350A (en) * | 2020-08-19 | 2020-12-25 | 中国港湾工程有限责任公司 | Construction process of marine gravel pile |
| CN114753414A (en) * | 2022-04-13 | 2022-07-15 | 中交三航局第三工程有限公司 | Intelligent anti-scouring device and method for annular grid type fluidized soil steel pipe pile |
| CN115369882A (en) * | 2022-09-05 | 2022-11-22 | 中国建筑第七工程局有限公司 | Post grouting device for cast-in-place pile and construction method |
| CN115369882B (en) * | 2022-09-05 | 2024-03-26 | 中国建筑第七工程局有限公司 | Post grouting device for cast-in-place pile and construction method |
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