CN208235534U - A kind of device using active isolation pile control influence of foundation excavation - Google Patents
A kind of device using active isolation pile control influence of foundation excavation Download PDFInfo
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- CN208235534U CN208235534U CN201820134896.6U CN201820134896U CN208235534U CN 208235534 U CN208235534 U CN 208235534U CN 201820134896 U CN201820134896 U CN 201820134896U CN 208235534 U CN208235534 U CN 208235534U
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- slip casting
- isolation pile
- foundation pit
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Abstract
The utility model discloses a kind of devices using active isolation pile control influence of foundation excavation; row's isolation pile is embedded in the active region soil body between foundation pit enclosure structure and the protection zone soil body; the spacing of isolation pile is 3~5m; slip casting casing is set at a side position of each isolation pile close to foundation pit; the prefabricated slip casting point of arrangement in slip casting casing; it is top-down on the side of each isolation pile other side to be disposed with multiple earth pressure gauges, to monitor resistance to shear of soil size at any time.Isolation pile uses prefabricated pile, and the diameter of slip casting casing is 100~300mm, and slip casting casing selects pvc pipe.Prefabricated slip casting point on slip casting casing be along slip casting casing length direction it is uniformly distributed, spacing is the diameter of 1~3 times of slip casting casing.The center of the prefabricated slip casting point of the slip casting casing of the isolation pile other side at earth pressure gauge and place setting corresponds.Cost is relatively low for the utility model, and strong flexibility does not influence the construction period, meets Deformation control requirement of the excavation of foundation pit to existing neighbouring protection zone.
Description
Technical field
The utility model relates to ground and basic engineering construction technical fields more particularly to a kind of excavation of foundation pit to protect to neighbouring
Protect the control device of area's soil deformation.
Background technique
With the fast development in city, Urban underground Tunnel puts into effect more and more, and urban land is nervous in addition, base
The environmental condition on hole periphery becomes to become increasingly complex, and foundation pit is on the deformation controlling standards of influence produced by surrounding enviroment also day
It is beneficial stringent.Influence Deformation control of the foundation pit to surrounding enviroment is by neighbouring existing building, road, underground utilities, viaduct
Deng the requirement of Centimeter Level Deformation control, develop to and the grade Deformation control on neighbouring operated subway, high-speed rail, airport etc. wanted
It asks, especially deep basal pit to the Deformation control of base pit engineering, challenge by theoretical, methods and techniques.Passive control used by now
Technology generally comprises soil stabilization, increases supporting construction rigidity, cross wall is arranged in foundation pit, isolation pile, foundation pit is arranged outside foundation pit
The measures such as subregion construction.However, these passive control technologies can dramatically increase cost, extend the duration, while lacking flexibility, only
Excavation of foundation pit can be reduced and cause the deformation for closing on the soil body, building and structures, grade control is able to satisfy sometimes or even not and wants
It asks.
At present using isolation pile technology to protection zone soil deformation regulating effect often and not in time, flexibly, be primarily present
Following defect:
First, it is difficult to accurately regulate and control the deformation of the protection zone soil body by isolation pile merely, correction is insufficient even
Correction, which is exaggerated, is not able to satisfy the requirement of Deformation control, still needs to using a series of subsequent processing.
Second, the soil body super pore pressure in periphery can be caused when regulating and controlling by isolation pile to the deformation of the protection zone soil body, super
A degree of deformation can be still generated after pore pressure dissipation.
Therefore, it researches and develops a kind of can realize in Excavation Process and timely, flexible modulation side is carried out to the protection zone soil body
Method is the urgent need of existing market development.
Utility model content
The utility model is using a kind of method that active isolation pile controls influence of foundation excavation, using active isolation
The Stress Control of the outer active region of foundation pit is realized in stake.The displacement of active region often very little then can lead to the outer soil body in hole and reach actively pressure
Power, therefore use active isolation pile, by the earth pressure gauge being arranged on isolation pile, change traditional isolation pile by strain come
The mode for controlling deformation, switchs to realize the controllable of deformation by way of cheating external carbuncle, and the environment for reducing foundation pit influences.
In order to solve the above-mentioned technical problem, the utility model proposes it is a kind of using active isolation pile control excavation of foundation pit
The device of influence includes foundation pit enclosure structure, in the active region soil body between the foundation pit enclosure structure and the protection zone soil body
It is embedded to row's isolation pile, the spacing of the isolation pile is 3~5m, and note is arranged at a side position of each isolation pile close to foundation pit
Casing is starched, the prefabricated slip casting point of arrangement in the slip casting casing is top-down on the side of each isolation pile other side to be disposed with
Multiple earth pressure gauges, to monitor resistance to shear of soil size at any time.
Further, the utility model using active isolation pile control influence of foundation excavation device, wherein it is described every
Prefabricated pile is used from stake, i.e., before excavation of foundation pit that the isolation pile static pressure is native to the active region between foundation pit and the protection zone soil body
In vivo.
The diameter of the slip casting casing is 100~300mm, and the slip casting casing selects pvc pipe.
Prefabricated slip casting point on the slip casting casing be along slip casting casing length direction it is uniformly distributed, spacing is 1~3 times of slip casting
The diameter of casing.
The position of the model of the earth pressure gauge, quantity and arrangement requires to be designed according to Practical Project.
The center of the prefabricated slip casting point of the slip casting casing of the isolation pile other side at the earth pressure gauge and place setting
It corresponds.
Compared with prior art, the utility model has the beneficial effects that
(1) the utility model can realize precise controlling: by observing soil pressure in time in prefabricated slip casting point multiple slip casting on a small quantity
The variation of power count value, realizes the precise controlling to protection zone soil deformation.
(2) the utility model can realize orientation correction: due to having reserved the prefabricated slip casting point at different depth position, controllably
The soil deformation of different depth processed, therefore in this project, more slip casting points increase the directionality to object construction force, realize
Orientation correction and raising slip casting efficiency.
Detailed description of the invention
Fig. 1 is schematic diagram after excavation of foundation pit；
Fig. 2 is to squeeze into the schematic diagram after isolation pile before excavation of foundation pit；
Fig. 3 is grout injection control protection zone deformation elevational schematic view；
Fig. 4 is grout injection control protection zone deformation plane schematic diagram
In figure: 1- isolation pile, 2- slip casting casing, 3- earth pressure gauge, 4- ground-connecting-wall, the 5-protection zone soil bodys.
Specific embodiment
Technical solutions of the utility model are described in further detail in the following with reference to the drawings and specific embodiments, it is described
Specific embodiment is only explained the utility model, is not intended to limit the utility model.
The utility model proposes it is a kind of using active isolation pile control influence of foundation excavation device, include foundation pit
Building enclosure, the specific structure of the foundation pit enclosure is ground-connecting-wall 4, the foundation pit enclosure structure and the protection zone soil body in the present embodiment
Row's isolation pile 1 is embedded in the active region soil body between 5, the isolation pile 1 uses prefabricated pile, i.e., will be described before excavation of foundation pit
In 1 static pressure of isolation pile to the active region soil body between foundation pit and the protection zone soil body 5.The spacing of the isolation pile 1 is 3~5m,
Each isolation pile 1 is arranged slip casting casing 2 at a side position of foundation pit 6, and the diameter of the slip casting casing 2 is 100~
300mm, the slip casting casing 2 select pvc pipe.The prefabricated slip casting point 21 of arrangement in the slip casting casing 2, on the slip casting casing 2
Prefabricated slip casting point 21 be along slip casting casing 2 length direction it is uniformly distributed, spacing is the diameter of 1~3 times of slip casting casing.Each isolation
It is top-down on the side of 1 other side of stake to be disposed with multiple earth pressure gauges 3, it is described to monitor resistance to shear of soil size at any time
The position of the model of earth pressure gauge 3, quantity and arrangement requires to be designed, the earth pressure gauge 3 and place according to Practical Project
The isolation pile other side setting slip casting casing 2 prefabricated slip casting point 21 center correspond.
Using the method for active isolation pile control influence of foundation excavation in the utility model, comprising the following steps:
Step 1: firstly, earth pressure gauge 3 is attached on a side of isolation pile 1 according to design requirement；Then carry out every
It constructs, specifically includes from stake 1:
1, measurement and positioning.Foundation pit do not excavate before protection zone side away from quasi- excavations certain position arrangement piling foundation plan.
2, pile press machine is in place, leveling.
3, it hangs stake and feeds stake.Stake diameter is 300~600mm.
4, pile body centering straightening.Scene releases stake position, position error < 20mm.
5, piling.It pushes every time, about 1.5~2.0m in soil is goed deep into stake.Then pine folder rises, then presses, then press from both sides, so
It is repeated, a section stake is depressed, when a section stake is depressed into away from 80~100cm of ground, pile extension can be carried out or be put into Pile feeder, it will
Stake is depressed into designed elevation.
6, pile follower.The pile follower operation of static pressed pile can be carried out with the special Pile feeder (iron packet concrete) of in-situ precast.One
It is straight to push, it will be until final pressure control condition be met by the stake top absolute altitude of piling.
7, piling is terminated.
8, pile press machine is moved into next position, repeated the above steps, thus foundation pit enclosure structure and the protection zone soil body 5 it
Between the active region soil body in be embedded to row's isolation pile 1；
Step 2: in Excavation Process, the size of 3 numerical value of earth pressure gauge is observed at any time, when stress reduces, to prefabricated
The a small amount of slip casting of slip casting point 21, after waiting the numerical value of earth pressure gauge 3 steady, selection continues slip casting or stops note according to actual needs
Slurry, until stopping slip casting after protection zone periphery resistance to shear of soil is consistent with script stress.
The utility model is kept apart foundation pit and neighbouring protection zone using active isolation pile, guarantees excavation of foundation pit to neighbour
The influence of nearly protection zone meets control and requires.The active isolation pile is reinforced concrete rectangle pile, by isolation stake body two
Side is respectively arranged slip casting casing (containing prefabricated slip casting point 21) and earth pressure gauge, and excavation of foundation pit is before in foundation pit enclosure structure and protection
The active divider wall of embedment in the active region soil body between area, by prefabricated in slip casting casing 2 to being arranged in when excavation of foundation pit
21 slip casting of slip casting point controls the outer stress close to the protection zone side active region soil body of active isolation pile, reaches control protection zone
The requirement that soil deformation is met.Cost is relatively low for the implementation method of the utility model, and strong flexibility does not influence the construction period, full
Deformation control requirement of the sufficient excavation of foundation pit to existing neighbouring protection zone.
Although the utility model is described above in conjunction with attached drawing, the utility model is not limited to above-mentioned
Specific embodiment, the above mentioned embodiment is only schematical, rather than restrictive, the ordinary skill of this field
Personnel are under the enlightenment of the utility model, in the case where not departing from the utility model aims, can also make many variations, this
It belongs within the protection of the utility model a bit.
Claims (5)
1. a kind of device using active isolation pile control influence of foundation excavation, includes foundation pit enclosure structure, feature exists
In, be embedded to row's isolation pile (1) in the active region soil body between the foundation pit enclosure structure and the protection zone soil body (5), it is described every
Spacing from stake (1) is 3~5m, slip casting casing (2) is arranged at the side position of each isolation pile (1) close to foundation pit (6), institute
State the prefabricated slip casting point of arrangement in slip casting casing (2), on the side of each isolation pile (1) other side it is top-down be disposed with it is multiple
Earth pressure gauge (3), to monitor resistance to shear of soil size at any time.
2. according to claim 1 using the device of active isolation pile control influence of foundation excavation, which is characterized in that described
Isolation pile (1) uses prefabricated pile, i.e., before excavation of foundation pit by the isolation pile (1) static pressure to foundation pit and the protection zone soil body (5) it
Between the active region soil body in.
3. according to claim 1 using the device of active isolation pile control influence of foundation excavation, which is characterized in that described
The diameter of slip casting casing (2) is 100~300mm, and the slip casting casing (2) selects pvc pipe.
4. according to claim 1 using the device of active isolation pile control influence of foundation excavation, which is characterized in that described
Prefabricated slip casting point on slip casting casing (2) be along slip casting casing (2) length direction it is uniformly distributed, spacing is 1~3 times of slip casting casing
Diameter.
5. according to claim 1 using the device of active isolation pile control influence of foundation excavation, which is characterized in that described
The center one of the prefabricated slip casting point for the slip casting casing (2) that the isolation pile other side at earth pressure gauge (3) and place is arranged is a pair of
It answers.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820134896.6U CN208235534U (en) | 2018-01-25 | 2018-01-25 | A kind of device using active isolation pile control influence of foundation excavation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820134896.6U CN208235534U (en) | 2018-01-25 | 2018-01-25 | A kind of device using active isolation pile control influence of foundation excavation |
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| Publication Number | Publication Date |
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| CN208235534U true CN208235534U (en) | 2018-12-14 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201820134896.6U Active CN208235534U (en) | 2018-01-25 | 2018-01-25 | A kind of device using active isolation pile control influence of foundation excavation |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108222015A (en) * | 2018-01-25 | 2018-06-29 | 天津大学 | A kind of device and method using active isolation pile control influence of foundation excavation |
| CN110258580A (en) * | 2019-06-17 | 2019-09-20 | 中铁上海设计院集团有限公司 | A kind of construction method of the foundation pit enclosure structure as permanent underground structure |
-
2018
- 2018-01-25 CN CN201820134896.6U patent/CN208235534U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108222015A (en) * | 2018-01-25 | 2018-06-29 | 天津大学 | A kind of device and method using active isolation pile control influence of foundation excavation |
| CN108222015B (en) * | 2018-01-25 | 2023-08-11 | 天津大学 | Device and method for controlling foundation pit excavation influence by adopting active isolation piles |
| CN110258580A (en) * | 2019-06-17 | 2019-09-20 | 中铁上海设计院集团有限公司 | A kind of construction method of the foundation pit enclosure structure as permanent underground structure |
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