CN114250800A - Treatment method for seepage of jet grouting pile - Google Patents
Treatment method for seepage of jet grouting pile Download PDFInfo
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- CN114250800A CN114250800A CN202111673708.XA CN202111673708A CN114250800A CN 114250800 A CN114250800 A CN 114250800A CN 202111673708 A CN202111673708 A CN 202111673708A CN 114250800 A CN114250800 A CN 114250800A
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- 238000000034 method Methods 0.000 title claims abstract description 15
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 108
- 238000001556 precipitation Methods 0.000 claims abstract description 57
- 238000010276 construction Methods 0.000 claims abstract description 33
- 238000005086 pumping Methods 0.000 claims abstract description 18
- 238000005553 drilling Methods 0.000 claims abstract description 17
- 238000005507 spraying Methods 0.000 claims abstract description 14
- 238000004062 sedimentation Methods 0.000 claims abstract description 12
- 238000005259 measurement Methods 0.000 claims abstract description 7
- 238000007599 discharging Methods 0.000 claims abstract description 4
- 238000003672 processing method Methods 0.000 claims 8
- 230000007547 defect Effects 0.000 abstract description 3
- 210000000476 body water Anatomy 0.000 abstract 1
- 238000011065 in-situ storage Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000009412 basement excavation Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000003673 groundwater Substances 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D19/00—Keeping dry foundation sites or other areas in the ground
- E02D19/06—Restraining of underground water
- E02D19/10—Restraining of underground water by lowering level of ground water
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D19/00—Keeping dry foundation sites or other areas in the ground
- E02D19/06—Restraining of underground water
- E02D19/12—Restraining of underground water by damming or interrupting the passage of underground water
- E02D19/20—Restraining of underground water by damming or interrupting the passage of underground water by displacing the water, e.g. by compressed air
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D31/00—Protective arrangements for foundations or foundation structures; Ground foundation measures for protecting the soil or the subsoil water, e.g. preventing or counteracting oil pollution
- E02D31/02—Protective arrangements for foundations or foundation structures; Ground foundation measures for protecting the soil or the subsoil water, e.g. preventing or counteracting oil pollution against ground humidity or ground water
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
- E02D5/22—Piles
- E02D5/34—Concrete or concrete-like piles cast in position ; Apparatus for making same
- E02D5/46—Concrete or concrete-like piles cast in position ; Apparatus for making same making in situ by forcing bonding agents into gravel fillings or the soil
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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Structural Engineering (AREA)
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- General Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
Abstract
The invention provides a method for treating seepage of a jet grouting pile, which comprises the following steps: measurement and positioning: measuring and positioning a water seepage point and the water inrush degree thereof, and determining the construction position and the construction requirement of the dewatering well; drilling pipe holes: drilling precipitation well pipe holes which obliquely penetrate through the outer side of the rotary spraying pile on the inner side of the rotary spraying pile, and sequentially drilling the required number of precipitation well pipe holes; and (3) installing a dewatering well: inserting the precipitation well into the drilled precipitation well pipe hole; water seepage treatment: and pumping and discharging the seepage water into a vertical shaft sedimentation tank through a water pump after the seepage water enters the precipitation well pipe. The invention aims at driving small-caliber pipe wells at water seepage positions to reduce water, effectively solves the problem of pile body water seepage caused by defects or untight occlusion of the ultrahigh-pressure jet grouting pile, and ensures the waterless operation of a station foundation pit.
Description
Technical Field
The invention relates to the field of underground construction engineering structures, in particular to a method for treating seepage of a jet grouting pile.
Background
When underground works are limited to adopt a precipitation mode to control groundwater seepage, the water-stopping curtain is an effective water-stopping measure in non-precipitation construction. According to the research of a water-stopping test of a Beijing subway station, the water-stopping effect of matching the ultrahigh-pressure rotary jet grouting pile with the secant pile is not ideal.
At the present stage, a form of combining the ultrahigh pressure jet grouting piles and the side piles is mostly adopted as an enclosure and water stop structure of the underground excavated station, but the space of a pilot tunnel of the underground excavated station of the subway is limited, so that higher requirements are provided for the construction quality of the ultrahigh pressure jet grouting water stop curtain. When the ultrahigh pressure jet grouting pile is too fast in drilling speed or not high in vertical precision and the like, the situation that the occlusion is not tight occurs, at the moment, underground water in the stratum flows out into a foundation pit along a water seepage channel on the pile body, so that the construction of the earthwork and the structure of a station is influenced, the construction of an emergency dewatering well outside the station is greatly influenced by site conditions, and closed dewatering is not easy to form, so that a treatment method needs to be invented to solve the water seepage problem of the ultrahigh pressure jet grouting pile.
Disclosure of Invention
In order to solve the technical problems, the invention provides a method for treating water seepage of a jet grouting pile, which aims to pump a small-caliber pipe well at a water seepage part to reduce water, effectively solves the problem of water seepage of a pile body caused by defects or untight occlusion of an ultrahigh pressure jet grouting pile and ensures the waterless operation of a station foundation pit.
The invention provides a method for treating seepage of a jet grouting pile, which comprises the following steps:
measurement and positioning: measuring and positioning a water seepage point and the water inrush degree thereof, and determining the construction position and the construction requirement of the dewatering well;
drilling pipe holes: drilling precipitation well pipe holes which obliquely penetrate through the outer side of the rotary spraying pile on the inner side of the rotary spraying pile, and sequentially drilling the required number of precipitation well pipe holes;
and (3) installing a dewatering well: inserting the precipitation well into the drilled precipitation well pipe hole;
water seepage treatment: and pumping and discharging the seepage water into a vertical shaft sedimentation tank through a water pump after the seepage water enters the precipitation well pipe.
Furthermore, during measurement and positioning, the construction requirements are determined by combining site construction conditions; the construction requirements include: the drilling position, the precipitation depth, the inclination angle, the diameter of the required precipitation well and the number of the required precipitation wells.
Further, the precipitation well includes: the well pipe is arranged at the water seepage part of the jet grouting pile, the upper end of the well pipe is open, the lower end of the well pipe is closed, and a plurality of water seepage holes are uniformly formed in the pipe body; the water pump is arranged at the bottom of the inner side of the well pipe; and the water pumping pipe is sleeved in the well pipe, one end of the water pumping pipe is connected with the water pump, and the other end of the water pumping pipe extends out of the well pipe.
Furthermore, the position is arranged, and a water seepage hole area of the dewatering well casing is ensured to cover the water seepage point area above the water seepage point.
Furthermore, the depth of precipitation ensures the depth of the water seepage hole area of the precipitation well casing covering the water seepage point in the water seepage treatment.
Furthermore, the inclination angle is an angle that the precipitation well pipe penetrates from the inner side of the jet grouting pile to the outer side of the jet grouting pile in an inclined mode.
Furthermore, when the pipe holes are drilled, the required number of dewatering well pipe holes are drilled on the inner side of the rotary spraying pile in sequence along the construction direction of the rotary spraying pile.
Furthermore, after the dewatering well is installed, a water pump is required to be lowered to the bottom of a well pipe of the dewatering well, and a water pumping pipe is reserved to a vertical shaft sedimentation tank;
furthermore, during water seepage treatment, seepage water enters the well pipe through seepage holes on the well pipe of the dewatering well, and after certain seepage water is accumulated, the seepage water is pumped and discharged to the vertical shaft sedimentation tank through a water pump.
Furthermore, the dewatering well adopts a dewatering well pipe with the diameter of 80-150 mm.
It should be understood that the statements herein reciting aspects are not intended to limit the critical or essential features of any embodiment of the invention, nor are they intended to limit the scope of the invention. Other features of the present invention will become apparent from the following description.
Drawings
The above and other features, advantages and aspects of various embodiments of the present invention will become more apparent by referring to the following detailed description when taken in conjunction with the accompanying drawings. In the drawings, like or similar reference characters designate like or similar elements, and wherein:
FIG. 1 is a schematic cross-sectional arrangement of a tube well precipitation of the treatment method of the present embodiment;
FIG. 2 is a schematic plan view of the tube well precipitation of the treatment method of the present embodiment;
FIG. 3 is a schematic structural diagram of the dewatering well of the present embodiment;
wherein, the correspondence between the reference numbers and the component names in fig. 1 to 3 is:
the method comprises the following steps of 1 jet grouting pile, 2 cast-in-situ bored piles, 3 dewatering wells, 4 well pipes, 5 water pumps, 6 water pumping pipes and 7 seepage holes.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.
In addition, the term "and/or" herein is only one kind of association relationship describing an associated object, and means that there may be three kinds of relationships, for example, a and/or B, which may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" herein generally indicates that the former and latter related objects are in an "or" relationship.
The method for treating the seepage water of the jet grouting pile provided by the invention is described below with reference to fig. 1 and 2, and comprises the following steps:
measurement and positioning: measuring and positioning the water seepage point and the water burst degree thereof, and determining the construction position and the construction requirement of the dewatering well 3;
drilling pipe holes: drilling precipitation well 3 pipe holes obliquely penetrating to the outer side of the rotary jet pile 1 on the inner side of the rotary jet pile 1, and sequentially drilling required number of precipitation well 3 pipe holes;
and (3) installing a dewatering well: inserting the precipitation well 3 into the drilled precipitation well pipe hole;
water seepage treatment: and (4) pumping and discharging the seepage water into the precipitation well 3 pipe to a vertical shaft sedimentation tank through a water pump.
In the embodiment, during measurement and positioning, the construction requirement is determined by combining site construction conditions; the construction requirements include: the drilling position, the precipitation depth, the inclination angle, the diameter of the required precipitation well and the number of the required precipitation wells.
In the above embodiment, as shown in fig. 3, the dewatering well 3 includes: the well pipe 4 is arranged at the water seepage part of the jet grouting pile 1, the upper end of the well pipe is open, the lower end of the well pipe is closed, and a plurality of water seepage holes 7 are uniformly formed in the pipe body; a water pump 5 installed at the bottom of the inside of the well pipe 4; and the water pumping pipe 6 is sleeved in the well pipe 4, one end of the water pumping pipe is connected with the water pump 5, and the other end of the water pumping pipe extends out of the well pipe 4.
In the above embodiment, the inside and outside of the well pipe may be provided with a filter screen according to the water quality requirement of the water seepage to prevent sand from entering the precipitation well.
In the above embodiment, the position is set, and the area of the seepage holes 7 of the well casing 4 of the dewatering well 3 is ensured to cover the area of the seepage points above the seepage points.
In the above embodiment, the precipitation depth ensures the depth of the water seepage holes 7 of the well casing 4 of the precipitation well 3 covering the water seepage points in the water seepage treatment. In general construction, the depth of precipitation is 5-10m, and is set according to actual conditions.
In the above embodiment, the inclination angle is an angle at which the well casing 4 of the dewatering well 3 penetrates from the inner side of the jet grouting pile 1 to the outer side of the jet grouting pile 1 in an inclined manner. The inclined penetration arrangement is effective for solving the water seepage problem between the jet grouting pile and the cast-in-situ bored pile. In general construction, the inclination angle is 10-50 degrees, and is set according to actual conditions.
In the above embodiment, when the pipe holes are drilled, the required number of pipe holes of the dewatering well 3 are drilled in sequence inside the jet grouting pile 1 along the construction direction of the jet grouting pile 1.
In the embodiment, after the precipitation well 3 is installed, the water pump 5 is required to be lowered to the bottom of the well pipe 4 of the precipitation well 3, and the water pumping pipe 6 is reserved in the vertical shaft sedimentation tank;
in the above embodiment, during the water seepage treatment, seepage water enters the well pipe 4 through the seepage holes 7 on the well pipe 4 of the dewatering well 3, and after a certain amount of seepage water is accumulated, the seepage water is pumped and discharged to the vertical shaft sedimentation tank by the water pump 5.
In the above embodiment, the dewatering well 3 adopts the dewatering well pipe with the diameter of 80-150 mm.
[ example 1 ]
The water seepage process at the time of construction of a subway station will be described below with reference to fig. 1 and 2.
In the middle plate construction position of the subway, after the excavation of the first layer of earthwork of a platform layer of the subway is finished, when the water seepage of a pile body caused by the defect of the ultrahigh-pressure jet grouting pile 1 or the untight occlusion with the cast-in-situ pile 2 occurs, the driving position of a required precipitation well 3 is determined according to the water seepage point and the water seepage degree thereof and by combining site construction conditions, the precipitation depth is 5-10m, and the inclination angle is 15-30 degrees; selecting a plurality of PVC precipitation well pipes with the diameter of 100 mm;
the rotary spraying pile is arranged corresponding to the rotary spraying pile 1 and is longitudinally arranged along the length direction of a station, the pipe holes of the precipitation wells 3 which obliquely penetrate through the outer side of the rotary spraying pile 1 are arranged at the wall structure at the inner side of the rotary spraying pile 1, and the pipe holes of the precipitation wells 3 with required quantity are arranged in sequence;
inserting the well pipe 4 of the dewatering well 3 into the drilled well pipe hole 3 of the dewatering well; a water pump 5 is lowered to the bottom of a well pipe 4 of the precipitation well 3, and a water pumping pipe 6 is reserved to a vertical shaft sedimentation tank; the water pump 5 is a 6-square water pump, and the lift is not less than 40 m;
after the seepage water enters the precipitation well 3 through seepage holes 7 on the well pipe 4, the seepage water is accumulated to a certain degree, and then is pumped and discharged to a vertical shaft sedimentation tank through a water pump 5;
and after precipitation is finished, removing the pump, removing the pipe and sealing the hole.
The water seepage treatment method of the rotary jet grouting pile adopts a precipitation well with a small caliber, does not need special equipment, has simple construction method, can effectively solve the water seepage problem of the ultrahigh-pressure rotary jet grouting pile in the station and ensures the waterless operation of the foundation pit of the station; the precipitation construction efficiency is high, only the position of the water leakage needs to be arranged, and the construction cost is low.
In the description of the present invention, the terms "connect", "mount", "fix", and the like are used in a broad sense, for example, "connect" may be a fixed connection, a detachable connection, or an integral connection; may be directly connected or indirectly connected through an intermediate. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.
In the description of the present application, the description of the terms "one embodiment," "some embodiments," etc. means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the application. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The above is merely a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made to the present invention by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A method for treating seepage of a jet grouting pile is characterized by comprising the following steps:
measurement and positioning: measuring and positioning a water seepage point and the water inrush degree thereof, and determining the construction position and the construction requirement of the dewatering well;
drilling pipe holes: drilling precipitation well pipe holes which obliquely penetrate through the outer side of the rotary spraying pile on the inner side of the rotary spraying pile, and sequentially drilling the required number of precipitation well pipe holes;
and (3) installing a dewatering well: inserting the precipitation well into the drilled precipitation well pipe hole;
water seepage treatment: and pumping and discharging the seepage water into a vertical shaft sedimentation tank through a water pump after the seepage water enters the precipitation well pipe.
2. The processing method according to claim 1,
during the measurement and positioning, determining construction requirements by combining site construction conditions; the construction requirements include: the drilling position, the precipitation depth, the inclination angle, the diameter of the required precipitation well and the number of the required precipitation wells.
3. The processing method according to claim 2,
the dewatering well comprises:
the well pipe is arranged at the water seepage part of the jet grouting pile, the upper end of the well pipe is open, the lower end of the well pipe is closed, and a plurality of water seepage holes are uniformly formed in the pipe body;
a water pump installed at the bottom inside the well pipe;
the water pumping pipe is sleeved inside the well pipe, one end of the water pumping pipe is connected with the water pump, and the other end of the water pumping pipe extends out of the well pipe.
4. The processing method according to claim 3,
and the position is arranged above the water seepage point, so that the water seepage hole area of the dewatering well casing is ensured to cover the water seepage point area.
5. The processing method according to claim 3,
the precipitation depth guarantees that the seepage hole area of the precipitation well casing covers the depth of the seepage point in the seepage treatment.
6. The processing method according to claim 3,
the inclination angle is the angle that precipitation well casing runs through to the jet grouting pile outside from the inboard slope of jet grouting pile.
7. The processing method according to claim 3,
and when the pipe holes are drilled, sequentially drilling the required number of dewatering well pipe holes on the inner side of the rotary spraying pile along the construction direction of the rotary spraying pile.
8. The processing method according to claim 3,
after the dewatering well is installed, a water pump is required to be lowered to the bottom of a well pipe of the dewatering well, and a water pumping pipe is reserved to a vertical shaft sedimentation tank.
9. The processing method according to claim 3,
during the water seepage treatment, seepage water enters the well pipe through seepage holes on the well pipe of the precipitation well, and after certain seepage water is accumulated, the seepage water is pumped and discharged to a vertical shaft sedimentation tank through a water pump.
10. The treatment method as claimed in claim 1, wherein the dewatering well adopts dewatering well pipes with the diameter of 80-150 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111673708.XA CN114250800A (en) | 2021-12-31 | 2021-12-31 | Treatment method for seepage of jet grouting pile |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111673708.XA CN114250800A (en) | 2021-12-31 | 2021-12-31 | Treatment method for seepage of jet grouting pile |
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| CN114250800A true CN114250800A (en) | 2022-03-29 |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203924137U (en) * | 2014-05-21 | 2014-11-05 | 中铁十五局集团有限公司 | A kind of diaphragm wall serious leakage plugging structure |
| CN111321749A (en) * | 2020-03-05 | 2020-06-23 | 兰州理工大学 | Recyclable rapid dredging device for water leakage of foundation pit enclosure and construction method thereof |
| CN111851548A (en) * | 2020-08-25 | 2020-10-30 | 北京城建勘测设计研究院有限责任公司 | Dewatering inclined shaft in deep foundation pit and construction method thereof |
| CN112627198A (en) * | 2021-01-20 | 2021-04-09 | 中国建筑第八工程局有限公司 | Foundation pit supporting system with drainage function and construction method thereof |
-
2021
- 2021-12-31 CN CN202111673708.XA patent/CN114250800A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203924137U (en) * | 2014-05-21 | 2014-11-05 | 中铁十五局集团有限公司 | A kind of diaphragm wall serious leakage plugging structure |
| CN111321749A (en) * | 2020-03-05 | 2020-06-23 | 兰州理工大学 | Recyclable rapid dredging device for water leakage of foundation pit enclosure and construction method thereof |
| CN111851548A (en) * | 2020-08-25 | 2020-10-30 | 北京城建勘测设计研究院有限责任公司 | Dewatering inclined shaft in deep foundation pit and construction method thereof |
| CN112627198A (en) * | 2021-01-20 | 2021-04-09 | 中国建筑第八工程局有限公司 | Foundation pit supporting system with drainage function and construction method thereof |
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