CN102433884A - System and design method applying tree-root piles and pile side compacted grouting - Google Patents
System and design method applying tree-root piles and pile side compacted grouting Download PDFInfo
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- CN102433884A CN102433884A CN2011103153734A CN201110315373A CN102433884A CN 102433884 A CN102433884 A CN 102433884A CN 2011103153734 A CN2011103153734 A CN 2011103153734A CN 201110315373 A CN201110315373 A CN 201110315373A CN 102433884 A CN102433884 A CN 102433884A
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- root pile
- slip casting
- foundation ditch
- neighboring buildings
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Abstract
The invention discloses a system and a design method applying tree-root piles and pile side compacted grouting, which can be used for effectively reducing disturbance of foundation excavation on an adjacent surrounding building and preventing the surrounding building from sinking. The tree-root piles are tightly arranged between a foundation and the surrounding building; on one hand, the tree-root piles pass through a soil body sliding area between the foundation and the surrounding building and are embedded into a soil body under the soil body sliding area, and when the soil body shifts and is deformed, the shearing resistance of a sliding face of the tree-root piles and the side resistance and rigidity provided by a pile body are improved to limit the deformation development of the soil body after pilling and reduce the sinking and deformation of the building after pilling; on the other hand, when the surrounding building near the foundation is sunk and deformed largely, the lateral deformation of the tree-root piles can be effectively controlled by the method applying pile side compacted grouting, and the deformation development rate of the surrounding building is reduced; moreover, the tree-root piles are tightly arranged, the grouting pressure can be uniformly dispersed into the foundation under protected building facilitates, and direct grouting on the foundation is avoided to make the building facilitates uniformly lifted and protruded.
Description
Technical field
The present invention relates to a kind of foundation pit construction technical field, relate in particular to a kind of system and method for designing that adopts root pile and the compacted slip casting protection of stake side foundation ditch neighboring buildings.
Background technology
Along with the fast development of urban construction, in urban construction, run into a large amount of deep-foundation pit engineerings.The contiguous building construction of many deep-foundation pit engineering peripheries or other urban operating mechanisms, some or even historical relic's protection are built.Some is the residential houses of brick wood or brick mix structure in these buildings, and mostly its base form is the pedestal foot basis on the natural ground, and is very responsive to sedimentation, the displacement of foundation soil; Also have some buildings to be important urban operating mechanism, its sedimentation or relative settlement control to foundation requires very high.Therefore, must take effective measures the peripheral soil body sedimentation and deformation that control excavation unloading causes in the deep pit construction process in the urban district, avoid that foundation pit deformation is excessive to cause neighboring buildings depression, cracking even destruction.
At present, adopt the method for conventional isolation pile technical protection foundation ditch periphery facility to obtain certain application, isolation pile promptly only is set, and does not carry out a method of side slip casting.But when excavation of foundation pit had caused peripheral facility sedimentation and deformation excessive, conventional isolation pile technology just lost effect; In addition; When the protected facility of foundation ditch periphery adopts pile foundation, the protected mode that is employed in the isolation pile outside (promptly away from the foundation ditch side) grouting and reinforcing is also arranged, but this method is not suitable for the shallow foundation facility; Because the main purpose of stake outside slip casting is the sidewall frictional resistance that improves by protection facility pile foundation; Improve its pile foundation non-deformability, and direct slip casting can cause on the contrary building to be lifted on inhomogeneous under the shallow foundation facility, causes bulge fracture.
In sum, a kind of important technological problems that can be those skilled in the art to the protection system and the method for designing of foundation ditch periphery shallow foundation building facilities is provided.
Summary of the invention
The object of the present invention is to provide a kind of employing root pile and stake compacted filling system of side and method for designing; In order to protection foundation ditch neighboring buildings; Through root pile and the compacted slip casting of stake side are set, can effectively reduce the disturbance of foundation pit construction to neighboring buildings, reduce the sedimentation and the distortion of neighboring buildings.
In order to reach above-mentioned purpose, the present invention adopts following technical scheme:
A kind of system that adopts root pile protection foundation ditch neighboring buildings; Comprise root pile, compacted slip casting and slip casting facility; The closely connected arrangement of said root pile is arranged between foundation ditch and the neighboring buildings; Said root pile bottom is passed the soil body sliding area between said foundation ditch and the neighboring buildings and is embedded the solum of soil body sliding area bottom; Said foundation ditch is provided with at interval some roads from top to bottom and supports, said compacted slip casting through the slip casting facility be arranged at root pile near the foundation ditch side, and the degree of depth of the compacted slip casting of per pass second road, top that lays respectively at foundation ditch below supporting respective support degree of depth place.
Preferably, in the system of above-mentioned employing root pile protection foundation ditch neighboring buildings, said root pile is near said neighboring buildings.
Preferably, in the system of above-mentioned employing root pile protection foundation ditch neighboring buildings, the layout form of said root pile adopts arch, and vault points to neighboring buildings.
The invention also discloses a kind of employing root pile and the compacted slip casting method for designing of stake side, comprise the steps:
At first, closely connected arrangement is provided with root pile between foundation ditch and neighboring buildings, and said root pile passes the soil body sliding area between foundation ditch and the neighboring buildings and embeds the stable soil layer in soil body sliding area bottom;
Then, the beginning excavation pit, second road supports from the top; After each road of foundation ditch supports the construction completion; All carry out once compacted slip casting, what said compacted slip casting was arranged at root pile leans on the foundation ditch side, and the degree of depth of said compacted slip casting is positioned at the supporting depth place that firm construction is accomplished.
Preferably; In above-mentioned employing root pile and the compacted slip casting method for designing of stake side; When compacted mortar depositing construction, take information-aided construction, the distortion of real-time monitored neighboring buildings; After neighboring buildings distortion or development of deformation speed meet design requirement, can stop slip casting and carry out the construction of next layer soil excavation.
Preferably, in above-mentioned employing root pile and the compacted slip casting method for designing of stake side, said root pile is near said neighboring buildings above-mentioned.
Preferably, in above-mentioned employing root pile and the compacted slip casting method for designing of stake side, the layout form of said root pile adopts arch, and vault points to neighboring buildings.
The system and method for the compacted slip casting protection of employing root pile provided by the invention and stake side foundation ditch neighboring buildings mainly contains following effect:
1, through root pile being arranged between foundation ditch and the neighboring buildings; And said root pile passes the soil body sliding area between said foundation ditch and the neighboring buildings and embeds the solum of soil body sliding area bottom; Root pile mainly bears the frictional resistance that lateral earth pressure that excavation construction causes and ground relative settlement produce; And root pile can reduce the soil pressure that acts on the space enclosing structure to a certain extent, when the soil body produces sliding deformation; Root pile reduces a sedimentation and a distortion that building facilities (being neighboring buildings) is protected in the stake back through shear resistance that improves slide surface and the pile side resistance and the development of deformation of rigidity with the restriction stake back soil body that pile body provides.
2, adopt the compacted slip casting of root pile inboard (near the foundation ditch side); And the said compacted slip casting degree of depth is corresponding to each road supporting depth (the maximum position of peripheral soil deformation that promptly causes corresponding to every layer of soil excavation of foundation ditch); Can effectively reduce the lateral deformation of root pile, and then the sedimentation and deformation of control root pile outside building facilities.
3, the closely connected arrangement of root pile can evenly diffuse to grouting pressure by in the foundation soil of protection under the building facilities, and that can avoid that directly slip casting causes in ground is lifted protuberance by the protection building facilities on inhomogeneous.
In a word, the present invention can effectively reduce the disturbance of foundation pit construction to neighboring buildings through root pile and the compacted slip casting of stake side are set, and reduces the sedimentation and the distortion of neighboring buildings.
Description of drawings
The system and the method for designing of the compacted slip casting protection of employing root pile of the present invention and stake side foundation ditch neighboring buildings are provided by following embodiment and accompanying drawing.
Fig. 1 is the base pit engineering sectional view of the embodiment of the invention;
Fig. 2 is that the root pile of the embodiment of the invention is arranged sketch map;
Fig. 3 is the mechanism of action figure of root pile and compacted slip casting.
Among the figure, 1-foundation ditch, 2-neighboring buildings, 3-root pile, 4-soil body slipping face, 5-slip casting facility, the compacted slip casting of 6-, 7-support.
The specific embodiment
Below will do further to describe in detail to the system and method for employing root pile of the present invention and the compacted slip casting protection of stake side foundation ditch neighboring buildings.
Below with reference to accompanying drawings the present invention is described in more detail, has wherein represented the preferred embodiments of the present invention, should be appreciated that those skilled in the art can revise the present invention described here and still realize advantageous effects of the present invention.Therefore, following description is appreciated that extensively knowing to those skilled in the art, and not as limitation of the present invention.
For clear, whole characteristics of practical embodiments are not described.In following description, be not described in detail known function and structure, because they can make the present invention because unnecessary details and confusion.Will be understood that in the exploitation of any practical embodiments, must make a large amount of implementation details, for example, change into another embodiment by an embodiment according to relevant system or relevant commercial restriction to realize developer's specific objective.In addition, will be understood that this development possibly be complicated and time-consuming, but only be routine work to those skilled in the art.
For making the object of the invention, characteristic more obviously understandable, be further described below in conjunction with the accompanying drawing specific embodiments of the invention.What need explanation is, accompanying drawing all adopts the form of simplifying very much and all uses non-ratio accurately, only in order to convenient, the purpose of the aid illustration embodiment of the invention lucidly.
See also Fig. 1 to Fig. 3; The system of this employing root pile protection foundation ditch neighboring buildings; Be arranged between foundation ditch and the neighboring buildings; It comprises some root pile 3, some compacted slip casting 6 and some slip casting facilities 5; Said root pile 3 closely connected arrangements are arranged between foundation ditch 1 and the neighboring buildings 2 (promptly by the protection building facilities); Said root pile 3 is tried one's best near neighboring buildings 2, and said root pile 3 bottoms are passed the soil body sliding area (soil body zone of soil body slipping face 4 tops among Fig. 1 is soil body sliding areas) between said foundation ditch 1 and the neighboring buildings 2 and embedded the solum of soil body sliding area bottom, and said foundation ditch 1 is provided with some roads from top to bottom at interval and supports 7; Said compacted slip casting 6 through slip casting facility 5 be arranged at root pile 3 near the foundation ditch side, and second road, top that the degree of depth of the compacted slip casting 6 of per pass lays respectively at foundation ditch 1 supports respective support 7 places below 7.
Please continue to consult Fig. 1 to Fig. 3, the employing root pile of present embodiment and the compacted slip casting method for designing of stake side comprise the steps:
At first, closely connected arrangement is provided with root pile 3 between foundation ditch 1 and neighboring buildings 2, and said root pile 3 is near neighboring buildings 2, and said root pile 3 passes the soil body sliding area 4 between foundation ditch 1 and the neighboring buildings 2 and embeds the stable soil layer in soil body sliding area 4 bottoms;
Then; Beginning excavation pit 1; After second road supports 1 each road support 7 construction completion of 7 (that is to say, support 7 except that being positioned at uppermost first road) foundation ditch from the top, all carry out once compacted slip casting; What said compacted slip casting 6 was arranged at root pile 3 leans on foundation ditch 1 side, and the degree of depth of said compacted slip casting 6 is positioned at support 7 degree of depth places that firm construction is accomplished.
On the one hand; Because root pile 3 is arranged between foundation ditch 1 and the neighboring buildings 2; And said root pile 3 passes the soil body sliding area between said foundation ditch 1 and the neighboring buildings 2 and embeds the solum of soil body sliding area bottom; Root pile 3 mainly bears the frictional resistance that lateral earth pressure that foundation ditch 1 excavation construction causes and ground relative settlement produce; And root pile 3 can reduce the soil pressure on the space enclosing structure that acts on foundation ditch 1 to a certain extent, when the soil body produces sliding deformation; Root pile 3 is through shear resistance that improves slide surface 4 and the pile side resistance and the development of deformation of rigidity with the restriction stake back soil body that pile body provides, thereby reduces a sedimentation and the distortion that building facilities is protected in the stake back.
On the other hand; (near the foundation ditch side) is provided with compacted slip casting 6 in root pile 3 inboards; And said compacted slip casting 6 degree of depth support 7 degree of depth (promptly corresponding to foundation ditch 1 every layer of maximum position of peripheral soil deformation that soil excavation causes) corresponding to each road; Thereby can effectively reduce the lateral deformation of root pile 3, and then the sedimentation and deformation of the neighboring buildings 2 in control root pile 3 outsides.
Again on the one hand,, can grouting pressure evenly be diffused in the foundation soil under the neighboring buildings 2 of intending protection, lift protuberance on this neighboring buildings that can avoid that directly slip casting causes in ground 2 is inhomogeneous root pile 3 closely connected arranged.
In addition; In the present embodiment, when compacted mortar depositing construction, take information-aided construction; The distortion of real-time monitored neighboring buildings 2; After neighboring buildings 2 distortion or development of deformation speed meet design requirement, can stop slip casting and carry out the construction of next layer soil excavation, to guarantee the safety of neighboring buildings 2 in foundation ditch 1 construction.
Preferably, in the system and method for designing of above-mentioned employing root pile and the compacted slip casting of stake side, the layout form of said root pile 3 adopts arch, and vault 31 points to protected neighboring buildings 2.So, can improve the integral rigidity of root pile 3, thereby further reduce the influence of foundation pit construction protected neighboring buildings 2.
Find through monitoring, compare that after employing root pile and stake compacted filling system of side and the method for designing, the rate of settling of the neighboring buildings 2 of contiguous foundation ditch 1 has obtained effective control, thereby guarantees the safety of neighboring buildings in foundation ditch 1 digging process with similar foundation pit construction.
Obviously, those skilled in the art can carry out various changes and modification to the present invention and not break away from the spirit and scope of the present invention.Like this, belong within the scope of claim of the present invention and equivalent technologies thereof if of the present invention these are revised with modification, then the present invention also is intended to comprise these changes and modification interior.
Claims (7)
1. system that adopts root pile protection foundation ditch neighboring buildings; It is characterized in that; Comprise root pile, compacted slip casting and slip casting facility; The closely connected arrangement of said root pile is arranged between foundation ditch and the neighboring buildings, and said root pile bottom is passed the soil body sliding area between said foundation ditch and the neighboring buildings and embedded the solum of soil body sliding area bottom, and said foundation ditch is provided with some roads from top to bottom at interval and supports; Said compacted slip casting through the slip casting facility be arranged at root pile near the foundation ditch side, and the respective support degree of depth place of the degree of depth of the compacted slip casting of per pass second road, top that lays respectively at foundation ditch below supporting.
2. the system of employing root pile protection foundation ditch neighboring buildings according to claim 1 is characterized in that said root pile is near said neighboring buildings.
3. according to the system of each described employing root pile protection foundation ditch neighboring buildings in the claim 1～2, it is characterized in that the layout form of said root pile adopts arch, vault points to neighboring buildings.
4. one kind is adopted root pile and the compacted slip casting method for designing of stake side, it is characterized in that: comprise the steps:
At first, closely connected arrangement is provided with root pile between foundation ditch and neighboring buildings, and said root pile passes the soil body sliding area between foundation ditch and the neighboring buildings and embeds the stable soil layer in soil body sliding area bottom;
Then, the beginning excavation pit, second road supports from the top; After each road of foundation ditch supports the construction completion; All carry out once compacted slip casting, what said compacted slip casting was arranged at root pile leans on the foundation ditch side, and the degree of depth of said compacted slip casting is positioned at the supporting depth place that firm construction is accomplished.
5. employing root pile according to claim 4 and the compacted slip casting method for designing of stake side; It is characterized in that; When compacted mortar depositing construction, take information-aided construction, the distortion of real-time monitored neighboring buildings; After neighboring buildings distortion or development of deformation speed meet design requirement, can stop slip casting and carry out the construction of next layer soil excavation.
6. employing root pile according to claim 4 and the compacted slip casting method for designing of stake side is characterized in that said root pile is near neighboring buildings.
7. according to any described employing root pile in the claim 4～6 and the compacted slip casting method for designing of stake side, it is characterized in that the layout form of said root pile adopts arch, vault points to neighboring buildings.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011103153734A CN102433884A (en) | 2011-10-17 | 2011-10-17 | System and design method applying tree-root piles and pile side compacted grouting |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2011103153734A CN102433884A (en) | 2011-10-17 | 2011-10-17 | System and design method applying tree-root piles and pile side compacted grouting |
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| CN102433884A true CN102433884A (en) | 2012-05-02 |
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| CN2011103153734A Pending CN102433884A (en) | 2011-10-17 | 2011-10-17 | System and design method applying tree-root piles and pile side compacted grouting |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106120811A (en) * | 2016-08-24 | 2016-11-16 | 中天建设集团有限公司天津分公司 | A kind of foundation ditch periphery distortion preventing and deviation rectification construction method |
| CN109944236A (en) * | 2019-03-22 | 2019-06-28 | 中国建筑第八工程局有限公司 | Root pile actively follows track delamination pour slurry system and construction method |
| CN113323691A (en) * | 2021-06-04 | 2021-08-31 | 天津大学 | Foundation pit outer tunnel deformation control method based on liquid grout blocking wall |
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| CN1155028A (en) * | 1996-01-15 | 1997-07-23 | 同济大学 | Method for predicting and controlling harm to environment resulted from digging foundation pit |
| CN1376836A (en) * | 2001-03-27 | 2002-10-30 | 同济大学 | Method for controlling deformation of foundation pit's retaining wall by grouting in passive area of earth body |
| CN101122133A (en) * | 2006-08-07 | 2008-02-13 | 黎志中 | Method for reinforcing and increasing foundation pit passive earth pressure |
| CN101139836A (en) * | 2007-08-10 | 2008-03-12 | 上海市基础工程公司 | Drilling grout pile end follow-up grouting construction method |
| WO2010104234A1 (en) * | 2009-03-09 | 2010-09-16 | Chung Kwang-Ok | Structural steel casing, retaining wall, construction method thereof, and construction method for levee maintenance and road expansion |
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2011
- 2011-10-17 CN CN2011103153734A patent/CN102433884A/en active Pending
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| CN1155028A (en) * | 1996-01-15 | 1997-07-23 | 同济大学 | Method for predicting and controlling harm to environment resulted from digging foundation pit |
| CN1376836A (en) * | 2001-03-27 | 2002-10-30 | 同济大学 | Method for controlling deformation of foundation pit's retaining wall by grouting in passive area of earth body |
| CN101122133A (en) * | 2006-08-07 | 2008-02-13 | 黎志中 | Method for reinforcing and increasing foundation pit passive earth pressure |
| CN101139836A (en) * | 2007-08-10 | 2008-03-12 | 上海市基础工程公司 | Drilling grout pile end follow-up grouting construction method |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106120811A (en) * | 2016-08-24 | 2016-11-16 | 中天建设集团有限公司天津分公司 | A kind of foundation ditch periphery distortion preventing and deviation rectification construction method |
| CN109944236A (en) * | 2019-03-22 | 2019-06-28 | 中国建筑第八工程局有限公司 | Root pile actively follows track delamination pour slurry system and construction method |
| CN113323691A (en) * | 2021-06-04 | 2021-08-31 | 天津大学 | Foundation pit outer tunnel deformation control method based on liquid grout blocking wall |
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Application publication date: 20120502 |