CN108755725B - Well test sealing device for dry well and well test sealing construction method - Google Patents
Well test sealing device for dry well and well test sealing construction method Download PDFInfo
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- CN108755725B CN108755725B CN201810652519.6A CN201810652519A CN108755725B CN 108755725 B CN108755725 B CN 108755725B CN 201810652519 A CN201810652519 A CN 201810652519A CN 108755725 B CN108755725 B CN 108755725B
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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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Abstract
The invention provides a well test sealing device for a dry well and a well test sealing construction method. The pressure measuring sealing cover comprises a sealing cover body, a water drain pipe, a pressure gauge, an exhaust valve and a water drain switch, wherein one end of the water drain pipe is fixedly connected with the top of the sealing cover body, the other end of the water drain pipe is bent and extends along the horizontal direction, the pressure gauge is fixedly connected to the outer surface of the water drain pipe, the exhaust valve is fixedly connected to the outer surface of the water drain pipe, one end of the water drain switch is arranged on the outer surface of the water drain pipe, and the other end of the water drain switch can movably extend to the bottom of the inner wall of the water drain pipe; the connecting base is shaped into a sleeve structure, the upper part of the connecting base can be detachably connected with the bottom of the sealing cover body, and the lower part of the connecting base is covered on the top of the drain well. According to the invention, through arranging the pressure measuring sealing cover capable of measuring pressure and draining water, the technical problem that the sealing number given by theoretical calculation is too small is solved, the number of wells which can be actually sealed on site is accurately determined, and the waste of material resources, manpower and energy sources is effectively reduced.
Description
Technical Field
The invention relates to the technical field of building construction, in particular to a well test sealing device for a dry well and a well test sealing construction method.
Background
In the construction process of the ultra-deep and ultra-large foundation pit of the building engineering, a large well is often adopted to drain and reduce water in the foundation pit, so that a dry working environment is provided for earth excavation and underground structure construction, and the influence of water buoyancy on construction safety is eliminated at the initial stage of the structure construction.
After the construction of the building foundation structure is completed, the well sealing steel sleeve is embedded, and the foundation structure can offset a part of water buoyancy, so that after the number of well sealing is determined through theoretical calculation, a part of dry well can be sealed in advance. However, the number of well seals given by theoretical calculation is often too conservative, and the actual number of well seals is far smaller than the number of well seals allowed under the field condition, so that a great amount of material resources, manpower and energy are wasted.
Disclosure of Invention
In view of the above, the invention provides a well test sealing device and a well test sealing construction method for a dry well, which solve the technical problem that the number of sealed wells is too small given by the prior theoretical calculation by arranging a pressure measuring sealing cover capable of measuring pressure and draining water, more accurately determine the number of the dry wells which can be practically sealed on site, and achieve the purpose of effectively reducing waste of material resources, manpower and energy sources.
In order to achieve the above purpose, the technical scheme adopted by the invention is as follows: the utility model provides a test well sealing device for dredging well, cover locates the top of dredging well, a test well sealing device for dredging well includes: the pressure measuring sealing cover and the connecting base. The pressure measuring sealing cover comprises a sealing cover body, a water drain pipe, a pressure gauge, an exhaust valve and a water drain switch, wherein one end of the water drain pipe is fixedly connected with the top of the sealing cover body, the other end of the water drain pipe is bent and extends along the horizontal direction, the pressure gauge is fixedly connected to the outer surface of the water drain pipe, the exhaust valve is fixedly connected to the outer surface of the water drain pipe, one end of the water drain switch is arranged on the outer surface of the water drain pipe, and the other end of the water drain switch can movably extend to the bottom of the inner wall of the water drain pipe; the connecting base is shaped into a sleeve structure, the upper part of the connecting base is detachably connected with the bottom of the sealing cover body, and the lower part of the connecting base is covered on the top of the drain well.
The invention further improves the well testing and sealing device for the dry well, wherein a sleeve wire is arranged on the outer surface of the upper part of the connecting base, and threads are arranged on the inner surface of the lower part of the sealing cover body, so that the connecting base is connected with the sealing cover body through the sleeve wire in a threaded manner.
A further improvement of the well testing and sealing device for a dry well according to the invention is that the lower part of the connection base extends obliquely downwards and in opposite directions along the interior of the connection base.
The invention further improves a well testing and sealing device for a drain well, which is characterized in that the drain pipe is shaped into an L-shaped structure and comprises a control part and a connecting part, one end of the connecting part is fixedly connected with the top of the sealing cover body, and the other end of the connecting part is connected with the control part in an arc manner.
The invention further improves the well testing and sealing device for the drain well, which is characterized in that the outer surface of the control part is sequentially provided with the drain switch, the exhaust valve and the pressure gauge along the direction of the circular arc of the drain pipe
The invention further improves a well testing and sealing device for a drain well, which is characterized in that a connecting hole is formed in the top of a sealing cover body, and the sealing cover body is connected with a drain pipe through the connecting hole.
In addition, the invention further provides a well test sealing construction method of the well test sealing device for the dry well, wherein a well sealing steel sleeve is arranged at the upper part of the dry well, and the construction method comprises the following steps of:
step A, closing the drain wells with the minimum flow according to the quantity and the quantity obtained by theoretical calculation;
step B, marking the drain well with obviously smaller residual flow;
step C, sleeving the lower part of the connecting base on the outer side of the well sealing steel sleeve on the dry well with the mark, and firmly welding the connecting base and the periphery of the well sealing steel sleeve on the dry well;
step D, screwing the pressure measuring sealing cover and the connecting base tightly;
e, debugging and zeroing the pressure gauge, closing the water discharge switch, and opening the exhaust valve;
f, after the air in the drain well is exhausted, closing the exhaust valve, standing for a period of time, and observing the degree of the pressure gauge on each sealing cover body;
g, if the reading of the pressure gauge is obviously increased, indicating that the drain well cannot be closed, opening the water release switch to release pressure, unscrewing the sealing cover body, and placing a submersible pump into the drain well to continuously pump water;
and step H, if the reading of the pressure gauge is 0 or slightly increased, the dry well can be closed, the sealing cover body is unscrewed, a submersible pump is placed in the dry well to pump water rapidly, and the submersible pump is put out until the water level in the dry well is below 1m of the foundation slab, so that the well is sealed.
Further, in the step F, when the air release valve starts to have water burst or no water burst exists after 24 hours, air in the drainage well is discharged, and at this time, the air release valve is closed.
Further, in the step a, according to the record of the pumping shift of the drainage well, the drainage well with the minimum flow is obtained.
Further, in the step B, a mark is made on the casing steel pipe of the dry well.
The invention adopts the technical proposal, which has the following beneficial effects:
(1) By arranging the pressure measuring sealing cover capable of measuring pressure and draining, the technical problem that the number of sealed wells is too small in the existing theoretical calculation is solved, the number of the practically sealed drainage wells on site is more accurately determined, and the purposes of effectively reducing material resources, manpower and energy waste are achieved.
(2) The upper outer surface of the connecting base and the lower inner surface of the sealing cover body are provided with threading, so that the connecting base and the sealing cover body can be simply disassembled.
(3) A connecting hole is formed in the top of the sealing cover body, and the sealing cover body is connected with the drain pipe through the connecting hole, so that the sealing cover is firmer.
Drawings
FIG. 1 is a schematic diagram of a well testing and sealing device for a dry well according to the present invention.
FIG. 2 is a schematic diagram of the assembled structure of the well testing device for a dry well of the present invention.
Fig. 3 is a schematic structural view of the connection base and the well sealing steel casing.
Fig. 4 is a schematic structural view of a well testing and sealing device for a dry well, which is connected with a well sealing steel sleeve.
Reference numerals illustrate:
a pressure measuring closure 10; a cover body 11; a drain pipe 12; a control unit 121; a connection portion 122; a pressure gauge 13; an exhaust valve 14; a drain switch 15; a connection base 20; a mantle fiber 21; a steel casing 30.
Detailed Description
In order to facilitate the understanding of the present invention, the following description is provided with reference to the drawings and examples.
Referring to fig. 1 to 4, the present invention provides a well testing device for a dry well, which is covered on top of the dry well (not shown), and includes a pressure measurement cover 10 and a connection base 20. Wherein:
as shown in fig. 1 and 2, the pressure measuring cover 10 includes a cover body 11, a drain pipe 12, a pressure gauge 13, an exhaust valve 14 and a drain switch 15, one end of the drain pipe 12 is fixedly connected to the top of the cover body 11, the other end is bent and extends in a horizontal direction, the pressure gauge 13 is fixedly connected to the outer surface of the drain pipe 12, the exhaust valve 14 is fixedly connected to the outer surface of the drain pipe 12, one end of the drain switch 15 is disposed on the outer surface of the drain pipe 12, and the other end of the drain switch 15 is movably extended to the bottom of the inner wall of the drain pipe 12, so that the switch of the internal channel of the drain pipe 12 can be controlled through the drain switch 15 outside the drain pipe 12. Specifically, the drain pipe 12 is formed into an L-shaped structure, and includes a control portion 121 and a connection portion 122, wherein one end of the connection portion 122 is fixedly connected to the top of the cover body 11, and the other end is connected to the control portion 121 in an arc manner. Preferably, the outer surface of the control part 121 is sequentially provided with the drain switch 15, the exhaust valve 14 and the pressure gauge 13 along the circular arc direction of the drain pipe 12, so that when the internal channel of the drain pipe 12 is closed by the drain switch 15, the pressure measured by the pressure gauge 13 is the pressure of the closed space in the drain pipe 12, and the interior of the drain pipe 12 can be exhausted by the exhaust valve 14, so that whether the drain well can be closed can be accurately tested. Preferably, a connection hole (not shown) is formed on the top of the cover body 11, and the cover body 11 is connected to the drain pipe 12 through the connection hole (not shown).
As shown in fig. 2, the connection base 20 is formed in a sleeve structure, the upper portion of the connection base 20 is detachably connected to the bottom of the cap body 11, and the lower portion of the connection base 20 is covered on the top of the drain well (not shown).
Further, as shown in fig. 2, a threading 21 is provided on the upper outer surface of the connection base 20, and threads (not shown) are provided on the lower inner surface of the cap body 11, so that the connection base 20 is screwed to the cap body 11 through the threading 21.
The above describes the well testing device for a dry well and the preferred embodiment thereof, and the following description refers to fig. 1 to 4, which illustrate the construction method of the well testing device for a dry well.
A well test sealing construction method of a well test sealing device for a dry well, wherein a well sealing steel sleeve 30 is arranged at the upper part of the dry well (not shown), and the construction method comprises the following steps:
step A, closing the drain wells (not shown) with the minimum flow according to the quantity and the quantity obtained by theoretical calculation;
step B, marking the drain well (not shown) with obviously smaller residual flow;
step C, sleeving the lower part of the connecting base 20 on the outer side of the well sealing steel sleeve 30 on the drain well (not shown) with the mark, and firmly welding the connecting base 20 and the well sealing steel sleeve 30 on the drain well (not shown) in a circumferential manner;
step D, screwing the pressure measuring sealing cover 10 and the connecting base 20;
step E, debugging and zeroing the pressure gauge 13, closing the water discharge switch 15, and opening the exhaust valve 14;
step F, after the air in the drain well (not shown) is discharged, closing the exhaust valve 14 and standing for a period of time, and then observing the degree of the pressure gauge 13 on each of the cover bodies 11;
g, if the reading of the pressure gauge 13 is obviously increased, indicating that the drain well (not shown) cannot be closed, opening the water release switch 15 to release pressure, unscrewing the sealing cover body 11, and placing a submersible pump (not shown) into the drain well (not shown) to continuously pump water;
and step H, if the reading of the pressure gauge 13 is 0 or slightly increased, the pressure gauge indicates that the drain well (not shown) can be closed, the sealing cover body 11 is unscrewed, a submersible pump (not shown) is placed in the drain well (not shown) to pump water quickly until the water level in the drain well (not shown) is below 1m of the base plate (not shown), and the submersible pump (not shown) is lifted out for well sealing.
Further, in the step F, when the exhaust valve 14 starts to discharge water or when water is not discharged after 24 hours, air in the drain well (not shown) is discharged, and the exhaust valve 14 is closed.
Further, in the step a, according to the record of the pumping shift of the drainage well (not shown), the drainage well with the minimum flow is obtained.
Further, in the step B, a mark is made on the casing steel pipe 30 of the drain well (not shown).
Preferably, in the step F, the standing time may be 48 hours, but is not limited thereto, and may be adjusted according to actual construction conditions.
The present invention has been described in detail with reference to the drawings and embodiments, and one skilled in the art can make various modifications to the invention based on the above description. Accordingly, certain details of the illustrated embodiments are not to be taken as limiting the invention, which is defined by the appended claims.
Claims (8)
1. A test well sealing device for dredging dry well covers the top of locating the dry well, its characterized in that, a test well sealing device for dredging the dry well includes:
the pressure measuring sealing cover comprises a sealing cover body, a water drain pipe, a pressure gauge, an exhaust valve and a water drain switch, wherein one end of the water drain pipe is fixedly connected with the top of the sealing cover body, the other end of the water drain pipe is bent and extends along the horizontal direction, the pressure gauge is fixedly connected to the outer surface of the water drain pipe, the exhaust valve is fixedly connected to the outer surface of the water drain pipe, one end of the water drain switch is arranged on the outer surface of the water drain pipe, and the other end of the water drain switch can movably extend to the bottom of the inner wall of the water drain pipe;
the connecting base is shaped into a sleeve structure, the upper part of the connecting base is detachably connected with the bottom of the sealing cover body, and the lower part of the connecting base is covered on the top of the drain well;
the upper outer surface of the connecting base is provided with a threading, and the lower inner surface of the sealing cover body is provided with threads, so that the connecting base is connected with the sealing cover body through the threading;
the drain pipe is shaped into an L-shaped structure and comprises a control part and a connecting part, one end of the connecting part is fixedly connected with the top of the sealing cover body, and the other end of the connecting part is connected with the control part in an arc mode.
2. The well testing shut-in device for a dry well according to claim 1, wherein the lower portion of the connection base is shaped as an inverted trapezoid structure which is contracted downward, and the bottom surface area of the connection base is larger than the maximum area of the top of the dry well.
3. The well testing and sealing device for a dry well according to claim 1, wherein the drain switch, the exhaust valve and the pressure gauge are sequentially arranged on the outer surface of the control part along the circular arc direction of the drain pipe.
4. The well testing and sealing device for the drain well according to claim 1, wherein a connecting hole is formed in the top of the sealing cover body, and the sealing cover body is connected with the drain pipe through the connecting hole.
5. A well testing construction method for a well testing device for a dry well according to any one of claims 1 to 4, the dry well being provided at an upper portion thereof with a well sealing steel casing, characterized in that the construction method steps comprise:
step A, closing the drain wells with the minimum flow according to the quantity and the quantity obtained by theoretical calculation;
step B, marking the drain well with obviously smaller residual flow;
step C, sleeving the lower part of the connecting base on the outer side of the well sealing steel sleeve on the dry well with the mark, and firmly welding the connecting base and the periphery of the well sealing steel sleeve on the dry well;
e, debugging and zeroing the pressure gauge, closing the water discharge switch, and opening the exhaust valve;
f, after the air in the drain well is exhausted, closing the exhaust valve, standing for a period of time, and observing the degree of the pressure gauge on each sealing cover body;
g, if the reading of the pressure gauge is obviously increased, indicating that the drain well cannot be closed, opening the water release switch to release pressure, unscrewing the sealing cover body, and placing a submersible pump into the drain well to continuously pump water;
and step H, if the reading of the pressure gauge is 0 or slightly increased, the dry well can be closed, the sealing cover body is unscrewed, a submersible pump is placed in the dry well to pump water rapidly, and the submersible pump is put out until the water level in the dry well is below 1m of the foundation slab, so that the well is sealed.
6. The method according to claim 5, wherein in the step F, when water is not flushed from the exhaust valve or water is not flushed after 24 hours, the air in the dry well is exhausted, and the exhaust valve is closed.
7. The well test sealing construction method of the well test sealing device for the drainage well according to claim 5, wherein in the step A, the drainage well with the minimum flow rate is obtained according to the water pumping shift record of the drainage well.
8. The method for well test and well control construction of the well test and well control device for the dry well according to claim 5, wherein in the step B, marks are made on the well casing steel pipe of the dry well.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810652519.6A CN108755725B (en) | 2018-06-22 | 2018-06-22 | Well test sealing device for dry well and well test sealing construction method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810652519.6A CN108755725B (en) | 2018-06-22 | 2018-06-22 | Well test sealing device for dry well and well test sealing construction method |
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| Publication Number | Publication Date |
|---|---|
| CN108755725A CN108755725A (en) | 2018-11-06 |
| CN108755725B true CN108755725B (en) | 2023-06-09 |
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| CN201810652519.6A Active CN108755725B (en) | 2018-06-22 | 2018-06-22 | Well test sealing device for dry well and well test sealing construction method |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007100401A (en) * | 2005-10-05 | 2007-04-19 | Izumi Pump Seisakusho:Kk | Undergroundwater level lowering apparatus |
| CN107090840A (en) * | 2017-04-26 | 2017-08-25 | 中建三局集团有限公司 | A kind of drainage well closing mode of pre-buried annulus |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN206052748U (en) * | 2016-08-29 | 2017-03-29 | 中国建筑第八工程局有限公司 | The quick well-sealing device of dewatering well hydraulic pressure |
| CN208517960U (en) * | 2018-06-22 | 2019-02-19 | 中国建筑第八工程局有限公司 | Examination well-sealing device for drainage well |
-
2018
- 2018-06-22 CN CN201810652519.6A patent/CN108755725B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007100401A (en) * | 2005-10-05 | 2007-04-19 | Izumi Pump Seisakusho:Kk | Undergroundwater level lowering apparatus |
| CN107090840A (en) * | 2017-04-26 | 2017-08-25 | 中建三局集团有限公司 | A kind of drainage well closing mode of pre-buried annulus |
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| CN108755725A (en) | 2018-11-06 |
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