CN113638399B - Method for controlling soil body deformation from side by real-time dynamic repeatable reversible grouting - Google Patents
Method for controlling soil body deformation from side by real-time dynamic repeatable reversible grouting Download PDFInfo
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- CN113638399B CN113638399B CN202111077155.1A CN202111077155A CN113638399B CN 113638399 B CN113638399 B CN 113638399B CN 202111077155 A CN202111077155 A CN 202111077155A CN 113638399 B CN113638399 B CN 113638399B
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- grouting
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D3/00—Improving or preserving soil or rock, e.g. preserving permafrost soil
- E02D3/12—Consolidating by placing solidifying or pore-filling substances in the soil
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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
Abstract
The invention discloses a method for controlling soil deformation laterally by real-time dynamic repeatable reversible grouting, which is characterized in that a grouting device is put into a grouting hole and comprises a grouting pipe and an outer sleeve which are coaxially arranged and fixedly connected together, the upper end part of the grouting pipe is connected with a grout pipe, the lower part of the grouting pipe is provided with an inner bag which is hermetically connected with the grouting pipe, the outer bag is wrapped outside the inner bag, the lower end part of the outer sleeve is provided with a water inlet and a water outlet which are positioned inside the outer bag, the upper end part of the outer sleeve is connected with a water pipe, the water pipe is connected with a drain valve, a control system dynamically controls the deformation of the outer bag in real time by controlling the water supply quantity of the water pipe and the water discharge quantity of the drain valve according to soil deformation data monitored in real time, after the soil deformation control process is finished and the soil deformation is stable, the inner bag is grouted by the grout pipe and the grouting pipe, the water is discharged by the drain valve, and equal volume of equal pressure grout is adopted to replace the water in the outer bag. The invention can dynamically and repeatedly adjust the deformation of the soil body in real time in a reverse direction.
Description
Technical Field
The invention relates to the technical field of foundation, foundation engineering and underground engineering construction, in particular to a method for controlling soil body deformation from the side by real-time dynamic repeatable reversible grouting.
Background
Underground works construction generally can produce certain influence to the surrounding environment, for example precipitation and earthwork excavation in the deep foundation ditch engineering can arouse that foundation ditch bottom soil body uplift, surrounding soil body produce horizontal and vertical displacement, can influence peripheral subway tunnel and building safety even, so in underground works work progress, both will guarantee the stability of underground works structure itself, will carry out the strict control to underground works structure itself and the deformation of surrounding soil body again.
At present, the control effect of sleeve valve pipe grouting technology and single-point bag type grouting method on soil deformation cannot reach the expectation well, and the following defects mainly exist:
1) The sleeve valve tube grouting technology and the single-point bag grouting method have no real-time property. The sleeve valve pipe grouting and single-point bag grouting are adopted to control the soil deformation, only one-time grouting can be performed, and the grouting amount is difficult to adjust in real time according to the soil deformation in the grouting process.
2) Sleeve valve tube grouting and single point bladder grouting have no repeatability. The soil deformation caused by engineering construction has the characteristic of continuity, and after the soil deformation is controlled within the allowable range by single grouting, the soil can be continuously deformed by further engineering construction, so that the soil deformation is controlled by re-grouting. By adopting sleeve valve pipe grouting and single-point bag type grouting, only a plurality of rows of grouting holes can be drilled, one grouting hole cannot be reused, and when site conditions are limited, the plurality of rows of grouting holes are difficult to drill, so that the construction convenience is poor and the cost is high.
3) Sleeve valve tube grouting and single point bladder grouting are not reversible. After the grouting is adopted to control the deformation of the soil body, further engineering construction may cause the deformation of the soil body to change in the opposite direction, and the sleeve valve pipe grouting and the single-point bag type grouting are adopted, so that only new grouting holes can be arranged on the opposite side of a control area, and the existing grouting holes cannot be reused.
In conclusion, sleeve valve pipe grouting and single-point bag grouting are difficult to adjust grouting amount in real time, cannot adjust deformation amount for multiple times and cannot adjust soil deformation reversely.
Disclosure of Invention
The invention provides a method for controlling soil deformation laterally by real-time dynamic repeatable reversible grouting for solving the technical problems in the prior art, which can dynamically and repeatedly adjust the soil deformation in real time and reversely for multiple times.
The technical scheme adopted by the invention for solving the technical problems in the prior art is as follows: a method for controlling soil deformation laterally through real-time dynamic repeatable reversible grouting comprises the steps that a grouting device is arranged at a set position of a grouting hole, the grouting device comprises a grouting pipe and an outer sleeve which are coaxially arranged and fixedly connected together, the bottom end of the grouting pipe is closed, the grouting pipe penetrates through the outer sleeve, the bottom end of the outer sleeve is in sealing connection with the grouting pipe, the upper end of the grouting pipe is connected with a grouting liquid pipe, an inner bag in sealing connection with the grouting pipe is arranged at the lower portion of the grouting pipe, the grouting pipe penetrates through the inner bag, a plurality of uniformly distributed grouting ports are arranged on a pipe section, located inside the inner bag, of the grouting pipe, an outer bag is wrapped outside the inner bag, the upper end of the outer bag is in sealing and fixedly connected with the lower end of the outer sleeve, the lower end of the grouting pipe is in sealing connection with the lower end of the grouting pipe, water inlets and outlets located inside the outer bag are arranged at the lower end of the outer sleeve, the upper end of the outer sleeve is connected with a water pipe, a control system controls the water supply amount of the water bag and drainage valve of the grouting pipe according to real-time dynamic reversible grouting pipe, and drainage valves of the grouting pipe are adopted, and the soil body is stably deformed after the grouting pipe is monitored according to control the water supply and drainage valve of the water pipe.
The outer diameter of the outer sleeve is 30-50 mm, the outer diameter of the grouting pipe is 16-25 mm, the aperture of the grouting hole is 100-200 mm, and the diameter of the expanded inner bag and the expanded outer bag is 500-1000 mm.
The shape of the inner bag is determined according to the soil deformation control simulation result.
The invention has the advantages and positive effects that: the water is injected into the outer bag firstly, and because the water cannot be solidified, the water quantity in the outer bag can be dynamically controlled in real time according to the change condition of the deformation of the soil body in the process of controlling the deformation of the soil body, water can be injected or drained for many times, the deformation of the soil body can be dynamically controlled in real time, and the reversibility is achieved. The soil deformation control can be realized repeatedly by 1 grouting hole, and the grouting holes do not need to be additionally arranged for control. When the deformation of the soil body is not required to be controlled, slurry is injected into the inner bag, water in the outer bag is displaced in an equal-pressure and equal-volume mode through the drain valve on the outer sleeve, and tests show that the influence of the displacement process on the deformation of the soil body is extremely small.
Drawings
FIG. 1 is a schematic view of a structure to which the present invention is applied;
FIG. 2 is a schematic view of a water injection and drainage process using the present invention;
fig. 3 is a schematic view after grouting according to the invention.
In the figure: 1. an outer sleeve; 1-1, a water inlet and a water outlet; 2. a grouting pipe; 2-1, grouting ports; 3. an outer pouch; 4. an inner pouch; 5. a water pipe; 6. a slurry pipe.
Detailed Description
In order to further understand the contents, features and effects of the present invention, the following embodiments are illustrated and described in detail with reference to the accompanying drawings:
referring to fig. 1 to 3, a method for controlling soil deformation laterally by real-time dynamic repeatable reversible grouting includes setting a grouting device at a set position of a grouting hole, where the grouting device includes a grouting pipe 2 and an outer sleeve 1 coaxially and fixedly connected together, the bottom end of the grouting pipe 2 is closed, the grouting pipe 2 passes through the outer sleeve 1, the bottom end of the outer sleeve 1 is hermetically connected with the grouting pipe 2, the upper end of the grouting pipe 2 is connected with a slurry pipe 6, the lower part of the grouting pipe 2 is provided with an inner bag 4 hermetically connected therewith, the grouting pipe 2 passes through the inner bag 4, a plurality of uniformly distributed grouting ports 2-1 are provided on a pipe section of the grouting pipe 2 located inside the inner bag 4, an outer bag 3 is wrapped outside the inner bag 4, the upper end of the outer sleeve 3 is hermetically and fixedly connected with the lower end of the outer sleeve 1, the lower end of the outer bag 3 is hermetically connected with the lower end of the grouting pipe 2, the lower end of the outer sleeve 3 is fixedly connected with the lower end of the grouting pipe 2, the outer sleeve 1 is provided with the outer sleeve 1, the outer sleeve 5 is connected with a drain valve 5 for controlling deformation of a soil body through a drain valve, and a drain valve, the water pipe 5, the water pipe is connected with a water discharge valve for controlling deformation of the soil mass, and a water discharge valve for controlling the soil mass through the water discharge valve, the soil mass, and a water discharge valve, the soil mass.
In this embodiment, the outer diameter of the outer sleeve 1 is 30 to 50mm, the outer diameter of the grouting pipe 2 is 16 to 25mm, the aperture of the grouting hole is 100 to 200mm, and the diameter of the inner bag 4 and the outer bag 3 after expansion is 500 to 1000mm. The shape of the inner bag 4 is determined according to engineering experience and a soil deformation control simulation result.
The method comprises the following steps:
one) measurement lofting
And (4) lofting in a construction site, and determining the ground elevation, the drilling position and the drilling depth by using a total station according to the hole site design requirement.
II) drilling grouting holes
And drilling at the drilling position by adopting a drilling machine to form a hole with the aperture of 100-200 mm, and lifting the drill to the final hole at the designed depth of the drilled hole. Before drilling, the levelness of the body of the drilling machine and the verticality of a drill rod are checked, the drilling machine is required to be basically horizontal, and the vertical deviation of the drilling hole is less than 1%. The drill hole is drilled at a medium speed, and when the drill hole encounters a hard layer, the drill hole is decelerated slowly, so that the drill hole is prevented from being blocked. And the drilling hole adopts a slurry protection wall to prevent hole collapse.
III) installing a grouting device
The shapes of the inner bag and the outer bag can be determined according to the simulation result of soil deformation control, so that the inner bag and the outer bag can generate directional deformation, and the soil deformation can be reasonably controlled. The inner and outer bags are connected with the grouting pipe and the outer sleeve respectively and inserted into the designed depth of the drill hole.
IV) water injection correction
Adopt water injection equipment to lead to the intraductal water injection of overcoat through the water pipe, because the outer bag has the shape of settlement and high pressure resistant, impervious performance, along with the water injection volume increases, the volume grow gradually, and outer bag can extrude the soil body on every side to reach the purpose that makes the soil body directional deformation. And (3) with the progress of the engineering, the soil body is possibly further deformed, and water is dynamically injected or discharged into or out of the grouting hole in real time according to the soil body deformation data monitored in real time to further deform the soil body.
Fifthly) grouting replacement
After the surrounding soil body is deformed and stabilized, grouting equipment is adopted to quantitatively inject grout into the inner bag through a grout pipe, meanwhile, a drain valve is opened, and water in the outer bag is squeezed out in equal pressure and equal volume, so that replacement is realized. The slurry is a cement-water glass two-liquid type mixed liquid prepared by a tester. And grouting pressure, grouting time and grouting amount are adopted according to actual conditions. And stopping grouting of the grouting hole after the grouting amount meets the requirement.
According to the invention, the deformation of the outer bag is dynamically controlled in real time by controlling the water supply amount of the water pipe and the water discharge amount of the water discharge valve according to the soil deformation data monitored in real time, the deformation is controlled by adopting water injection, the real-time property, the repeatability and the reversibility are realized, the water injection amount can be adjusted in real time according to the soil deformation amount, and a grouting hole is not needed to be additionally punched for grouting after the primary grouting is finished. When the soil body continuously deforms due to engineering construction, continuous deviation rectification control needs to be carried out on the soil body, multiple times of water injection or water drainage can be carried out on one grouting hole by adopting the invention, the repeated use of one hole is realized, the construction is convenient, and the cost is low.
Although the preferred embodiments of the present invention have been described above with reference to the accompanying drawings, the present invention is not limited to the above-described embodiments, which are merely illustrative and not restrictive, and those skilled in the art can make many modifications without departing from the spirit and scope of the present invention as defined in the appended claims.
Claims (3)
1. A method for controlling soil deformation laterally through real-time dynamic repeatable reversible grouting is characterized in that a grouting device is put into a grouting hole to set a position, the grouting device comprises a grouting pipe and an outer sleeve which are coaxially arranged and fixedly connected together, the bottom end of the grouting pipe is closed, the grouting pipe penetrates through the outer sleeve, the bottom end of the outer sleeve is in sealing connection with the grouting pipe, the upper end of the grouting pipe is connected with a grout pipe, an inner bag in sealing connection with the grouting pipe is arranged at the lower portion of the grouting pipe, the grouting pipe penetrates through the inner bag, a plurality of uniformly distributed grouting ports are formed in a pipe section, located inside the inner bag, of the grouting pipe, an outer bag is wrapped outside the inner bag, the upper end of the outer bag is in sealing connection with the lower end of the outer sleeve, the lower end of the outer sleeve is in sealing connection with the lower end of the grouting pipe, an inlet and outlet located inside the outer bag are arranged at the lower end of the outer sleeve, the upper end of the outer sleeve is connected with a water pipe, a control system controls the water discharge valve of the water supply bag and drainage valves of the water bag according to real-time monitoring deformation data of the soil mass, and controls the deformation of the soil mass after the water supply bag and drainage valves of the water bag, and the water supply bag, and the soil mass of the water of the soil mass are stably deformed by adopting the water discharge valves.
2. The method for controlling soil deformation laterally according to claim 1, wherein the outer diameter of the outer sleeve is 30-50 mm, the outer diameter of the grouting pipe is 16-25 mm, the aperture of the grouting hole is 100-200 mm, and the diameters of the inner bag and the outer bag after expansion are 500-1000 mm.
3. The method for controlling soil deformation laterally through real-time dynamic repeatable reversible grouting according to claim 1, wherein the shape of the inner bag is determined according to engineering experience and a soil deformation control simulation result.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111077155.1A CN113638399B (en) | 2021-09-13 | 2021-09-13 | Method for controlling soil body deformation from side by real-time dynamic repeatable reversible grouting |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111077155.1A CN113638399B (en) | 2021-09-13 | 2021-09-13 | Method for controlling soil body deformation from side by real-time dynamic repeatable reversible grouting |
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| Publication Number | Publication Date |
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| CN113638399A CN113638399A (en) | 2021-11-12 |
| CN113638399B true CN113638399B (en) | 2022-12-06 |
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| CN114136267B (en) * | 2021-11-15 | 2022-09-02 | 天津大学 | Measurement and control integrated soil deformation dynamic control system based on composite capsule |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP2841255B2 (en) * | 1992-06-25 | 1998-12-24 | ライト工業株式会社 | Consolidation method for soft ground |
| CN2728987Y (en) * | 2004-09-21 | 2005-09-28 | 郭亮 | Film sealing bag for storing liquid |
| CN204252139U (en) * | 2014-11-07 | 2015-04-08 | 山东大学 | Be applied to the two-layer equation film bagging apparatus of Grouting Pipe sealing in water burst sandy soils |
| CN205712093U (en) * | 2016-02-06 | 2016-11-23 | 北京市勘察设计研究院有限公司 | A kind of air bag plugging device carrying out grouting under pressure to soil nailing and anchor pole |
| CN105862874B (en) * | 2016-04-14 | 2017-09-19 | 浙江科技学院 | A kind of means of defence for controlling closing foundation ditch construction of structures to deform |
| CN106437611B (en) * | 2016-10-24 | 2018-12-04 | 河南理工大学 | Prefabricated pipeline grouting with pressure method for sealing and device in mash gas pumping drilling hole |
| CN206815315U (en) * | 2017-05-23 | 2017-12-29 | 天津大学 | The fluid injection supercharging capsule of fluid injection supercharging joint grouting and reinforcing super soft ground |
| CN110144901A (en) * | 2019-05-22 | 2019-08-20 | 宁波大学 | A kind of prefabricated high-pressure gasbag isolation pilework and construction method with slip casting function |
| CN112252300A (en) * | 2019-07-21 | 2021-01-22 | 上海班升科技有限公司 | Construction method for compensating foundation pit deformation by adopting hydraulic side expansion steel sheet pile |
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