CN114922214A - Pressure-stabilizing permeation-promoting method and pressure dewatering equipment suitable for said method - Google Patents
Pressure-stabilizing permeation-promoting method and pressure dewatering equipment suitable for said method Download PDFInfo
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- CN114922214A CN114922214A CN202210706071.8A CN202210706071A CN114922214A CN 114922214 A CN114922214 A CN 114922214A CN 202210706071 A CN202210706071 A CN 202210706071A CN 114922214 A CN114922214 A CN 114922214A
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- 238000000034 method Methods 0.000 title claims abstract description 50
- 238000001556 precipitation Methods 0.000 claims abstract description 91
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 56
- 230000000087 stabilizing effect Effects 0.000 claims abstract description 21
- 230000007613 environmental effect Effects 0.000 claims abstract description 12
- 229920002379 silicone rubber Polymers 0.000 claims description 52
- 239000004945 silicone rubber Substances 0.000 claims description 48
- 238000000926 separation method Methods 0.000 claims description 22
- 238000010276 construction Methods 0.000 claims description 18
- 230000007246 mechanism Effects 0.000 claims description 15
- 238000007789 sealing Methods 0.000 claims description 8
- 238000000429 assembly Methods 0.000 claims description 6
- 230000000712 assembly Effects 0.000 claims description 6
- 238000002955 isolation Methods 0.000 claims description 5
- 239000012535 impurity Substances 0.000 claims description 4
- 239000003657 drainage water Substances 0.000 claims description 3
- 230000008878 coupling Effects 0.000 claims description 2
- 238000010168 coupling process Methods 0.000 claims description 2
- 238000005859 coupling reaction Methods 0.000 claims description 2
- 238000009434 installation Methods 0.000 claims 1
- 230000001737 promoting effect Effects 0.000 abstract description 22
- 230000008595 infiltration Effects 0.000 abstract description 12
- 238000001764 infiltration Methods 0.000 abstract description 12
- 238000009435 building construction Methods 0.000 abstract description 2
- 239000002689 soil Substances 0.000 description 59
- 230000008569 process Effects 0.000 description 18
- 238000005192 partition Methods 0.000 description 15
- 230000000694 effects Effects 0.000 description 11
- 239000012466 permeate Substances 0.000 description 10
- 238000005056 compaction Methods 0.000 description 6
- 238000007599 discharging Methods 0.000 description 6
- 238000002347 injection Methods 0.000 description 6
- 239000007924 injection Substances 0.000 description 6
- 239000011148 porous material Substances 0.000 description 6
- 230000008901 benefit Effects 0.000 description 5
- 238000005553 drilling Methods 0.000 description 5
- 239000000243 solution Substances 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 230000009467 reduction Effects 0.000 description 4
- 238000005086 pumping Methods 0.000 description 3
- 230000006641 stabilisation Effects 0.000 description 3
- 238000011105 stabilization Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- 238000007689 inspection Methods 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 239000003673 groundwater Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 239000013049 sediment Substances 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 238000006467 substitution reaction 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
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A20/00—Water conservation; Efficient water supply; Efficient water use
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- General Life Sciences & Earth Sciences (AREA)
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- Paleontology (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Environmental & Geological Engineering (AREA)
- Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
Abstract
The invention relates to the technical field of building construction, in particular to a pressure stabilizing and seepage promoting method and a pressurizing and dewatering device suitable for the method. The pressure-stabilizing infiltration promoting method comprises the steps of constructing a plurality of dewatering wells around a region needing dewatering; constructing a plurality of pressurized wells at intervals at the middle positions between the area needing to be dewatered and the environmental facility to be protected; arranging a pressurizing device in the pressurizing well, wherein the pressurizing device can introduce gas into the pressurizing well so as to increase the gas pressure in the pressurizing well; and a precipitation device is arranged in the precipitation well, and the precipitation device can pump out water in the precipitation well. The pressurizing precipitation equipment comprises the pressurizing device and a precipitation device. The invention provides a pressure-stabilizing permeation-promoting method and pressurized precipitation equipment suitable for the method, which are used for solving the technical problem that the precipitation engineering in the prior art is easy to cause uneven settlement of stratums so as to cause damage to roads, buildings and underground pipelines in the engineering range.
Description
Technical Field
The invention relates to the technical field of building construction, in particular to a pressure stabilizing and seepage promoting method and a pressurizing and dewatering device suitable for the method.
Background
In recent years, underground projects such as deep foundation pits of high-rise buildings, subways, urban comprehensive pipe galleries and the like are increasingly constructed, the projects are often constructed in aquifers, and soil instability such as soil collapse, quicksand and the like easily occurs during construction in water-containing stratums, so that precipitation measures are needed to be taken to reduce the underground water level below the project construction position so as to ensure the safety and convenience of construction. Therefore, precipitation engineering is the key for ensuring engineering safety construction and efficient construction, not only can improve the self-strength of a soil body, reduce the side pressure coefficient, improve the self-bearing capacity and reduce the pressure on a supporting structure, but also ensures the waterless operation condition, is convenient to construct, and is the most widely, most effectively and most economically applied underground water control measure.
However, in the precipitation process, the pore water pressure is dissipated and the effective stress is increased, so that the surrounding soil body is consolidated and compacted, the uneven settlement of the stratum is easily caused, and the damage to roads, buildings and underground pipelines in the engineering range is caused.
The present application therefore addresses the above-mentioned problems by providing a new method of stabilizing pressure and promoting infiltration and a pressurized precipitation apparatus suitable for use in the method.
Disclosure of Invention
The invention aims to provide a pressure-stabilizing permeation-promoting method to solve the technical problem that roads, buildings and underground pipelines in the engineering range are damaged due to uneven settlement of stratums in precipitation engineering in the prior art.
The invention also aims to provide the pressurized precipitation equipment to further relieve the technical problem that the precipitation engineering in the prior art is easy to cause uneven settlement of stratums so as to cause damage to roads, buildings and underground pipelines in the engineering range.
Based on the first object, the invention provides a method for stabilizing pressure and promoting infiltration, which comprises the following steps:
step S1, constructing a plurality of dewatering wells around the area needing dewatering;
step S2, constructing a plurality of pressurized wells at intervals at the middle positions between the area needing to be dewatered and the environmental facility to be protected;
step S3, arranging a pressurizing device in the pressurizing well, wherein the pressurizing device can inject gas into the pressurizing well to increase the gas pressure in the pressurizing well;
and step S4, arranging a precipitation device in the precipitation well, wherein the precipitation device can pump out water in the precipitation well.
Further, the step S2 includes:
firstly, lofting at a middle position between a region needing to be dewatered and a facility to be protected and environment to obtain a construction position of a pressurized well, marking the position, and then leveling the marked position and removing impurities;
and then carrying out artificial exploratory well construction at the marked position to form the pressurized well.
By adopting the technical scheme, the method for stabilizing the pressure and promoting the infiltration has the following beneficial effects:
in the prior art, when the precipitation operation is performed on the area needing precipitation, a plurality of precipitation wells are constructed around the area needing precipitation, underground water in the area needing precipitation can permeate into the precipitation wells, and then the operation personnel pump out water in the precipitation wells, so that the purpose of precipitation on the area needing precipitation can be achieved. However, in the course of precipitation operation, with the dissipation of pore water pressure of soil layers and the increase of effective stress, soil around the area needing precipitation is consolidated and compacted, which easily causes uneven settlement of the stratum and damages roads, buildings and underground pipelines in the engineering range.
In this embodiment, a plurality of pressurized wells are constructed at intervals at intermediate positions between the area to be dewatered and the environmental facility to be protected, and a pressurizing device is arranged in the pressurized wells, so that the pressurizing device can introduce gas into the pressurized wells, and the gas pressure in the pressurized wells is increased. Therefore, gas in the pressurizing well can permeate into surrounding soil bodies through the pressurizing well, wherein part of gas permeates and diffuses into the area needing to be lowered, so that the gas pressure of the soil bodies in the area needing to be lowered is increased, pressure is formed on water in gaps among the soil bodies, the water enters the lowering well through the side wall of the lowering well, and water in the lowering well is pumped out through the lowering device. Wherein, the air pressure injected into the soil body by the pressurizing device is used for replacing water discharged from gaps of the soil body, so as to effectively reduce the compaction deformation generated by the increase of effective stress in the water draining process, namely playing the role of 'pressure stabilization'; in addition, in the air pressure injection process, the process of discharging water from the soil body is accelerated, the problem of common soil layer drying effect is effectively improved, and the effect of 'permeation promotion' is achieved. Therefore, the pressure stabilizing and permeation promoting method utilizes the air pressure injected into the soil body of the area needing to be subjected to water reduction by the pressurizing device, and forces the water in the soil layer of the area needing to be subjected to water reduction to be effectively discharged in the air pressure injection process, so that the process of discharging the water in the soil layer is accelerated, the effects of effectively improving the drainage of the cohesive soil layer and quickly reducing the water in the area needing to be subjected to water reduction are realized, and the outstanding problems that the drainage difficulty of partial cohesive soil layers in the area needing to be subjected to water reduction is high and the risk of the engineering is overlarge due to water retention are effectively solved.
In addition, partial gas can also permeate and diffuse into the to-be-protected environment facility area, so that the air pressure of the soil body in the to-be-protected environment facility area is increased, and the pore air pressure in the soil body is increased, wherein the air pressure injected into the soil body through the pressurizing device can replace water discharged from the soil body gaps of the to-be-protected environment facility area, so that the compaction deformation generated by the increase of the effective stress in the water draining process is effectively reduced, namely, the effect of stabilizing the pressure is achieved, namely, the water in the soil body in the to-be-protected environment facility area is replaced through the air pressure, the compaction of the soil body caused by the increase of the effective stress in the water discharging process in the soil layer is inhibited, and the risk of deformation of the soil body in the to-be-protected environment facility area can be effectively controlled.
In conclusion, the pressure-stabilizing infiltration promoting method can ensure the effective drainage effect of the soil body of the area needing to be dewatered, can reduce the deformation risk of the soil body of the environmental facility area to be protected, effectively ensures the smooth promotion of engineering construction, and has remarkable economic and social benefits.
In view of the second object, the invention provides a pressurized precipitation device, which comprises the pressurizing device and the precipitation device.
Further, the pressurizing device comprises a shell and an air inlet system;
the shell is provided with an inner cavity and an air outlet communicated with the inner cavity, and the air inlet system can supply air to the inner cavity;
the casing set up in the pressurized well, air intake system to the inner chamber air feed can make atmospheric pressure pass through the venthole gets into the pressurized well.
Further, the pressurizing device further comprises a pressure separation system;
the pressure isolation system enables isolation into a plurality of pressure zones within the pressurized well along a depth direction of the pressurized well.
Furthermore, the pressure separation system comprises a plurality of separation plates which are arranged at intervals along the depth direction of the inner cavity, the separation plates enable the inner cavity to be separated into a plurality of sub-cavities, and two adjacent sub-cavities are respectively a spacing sub-cavity and an air outlet sub-cavity;
the pressure separation system also comprises a plurality of pressurized deformable silicone rubber pipes, and the silicone rubber pipes are sleeved outside the shell and correspond to the spaced sub-cavities one by one;
follow the depth direction of silicone rubber tube, the equal rigid coupling in both ends of silicone rubber tube in the casing, just the silicone rubber tube includes that the intermediate part is to keeping away from the direction of casing expand to with the first state and the intermediate part of the wall of a well contact of pressurized-well hug closely in the second state of casing, the silicone rubber tube is in during the first state, follow the depth direction of pressurized-well, the silicone rubber tube makes separate for a plurality of pressure subregion in the pressurized-well.
Further, the air inlet system comprises an air source and an air inlet mechanism, the air inlet mechanism comprises a pressurizing pipe connected to the air source and a plurality of branch assemblies which are connected to the pressurizing pipe, and the number of the branch assemblies is consistent with that of the air outlet branch cavities;
the branch assembly comprises a branch pipe provided with a pressurizing hole and a row hole, the branch pipe is communicated with the pressurizing pipe, the branch pipe penetrates through the interval sub-cavity and extends into the air outlet sub-cavity, the pressurizing hole is formed in the interval sub-cavity, and the row hole is formed in the air outlet sub-cavity;
the pressurizing holes of each branch pipe are correspondingly arranged in one of the interval sub-cavities, the row holes of each branch pipe are correspondingly arranged in one of the gas outlet sub-cavities, the pressurizing holes of different branch pipes are respectively arranged in different interval sub-cavities, and the row holes of different branch pipes are respectively arranged in different gas outlet sub-cavities;
the air outlet hole is formed in the position, corresponding to the air outlet sub-cavity, of the shell, and the expansion hole is formed in the position, corresponding to the interval sub-cavity, of the shell.
Furthermore, the branch assembly further comprises a pressure reducing valve, a pressure gauge and a stop valve which are all arranged on one side, close to the pressurizing pipe, of the branch pipe.
Furthermore, the pressure separation system also comprises a fixing mechanism, and both ends of the silicone rubber tube are fixedly connected to the shell through the fixing mechanism;
the fixing mechanism comprises a binding belt and a sealing ring, wherein the binding belt is sleeved on one side of the silicon rubber pipe and far away from one side of the shell, and the sealing ring is arranged between the binding belt and the silicon rubber pipe.
Further, the precipitation device comprises a drain pipe arranged in the precipitation well and a drainage pump connected to the drain pipe; the drainage water pump can pump out water in the precipitation well through the drainage pipe.
By adopting the technical scheme, the pressurizing dewatering equipment has the following beneficial effects:
the pressure stabilizing infiltration promoting method is used for the pressure stabilizing infiltration promoting device, and accordingly the pressure stabilizing infiltration promoting device has all the advantages of the pressure stabilizing infiltration promoting method and is not described in detail herein.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
FIG. 1 is a schematic diagram of a prior art construction for precipitation operation in a region requiring precipitation;
FIG. 2 is a schematic construction diagram of a pressure-stabilizing infiltration-promoting method provided by an embodiment of the invention;
FIG. 3 is a schematic diagram of a pressurized precipitation apparatus with a pressurizing device disposed in a pressurized well according to an embodiment of the present invention;
FIG. 4 is an enlarged view of a portion of the compression device shown in FIG. 3;
FIG. 5 is a partial schematic view of the pressurizing device shown in FIG. 3 (the silicone rubber tube is in a first state);
FIG. 6 is a partial schematic view of the pressurizing device shown in FIG. 3 (the silicone rubber tube is in a second state);
fig. 7 is a top view of the pressurizing device shown in fig. 6.
Reference numerals:
a' -a region needing precipitation; 1' -dewatering well;
a-a region needing precipitation; b-planning to protect environmental facilities;
11-a pressurized well; 111-pressure partition; 12-a dewatering well;
2-a shell; 21-lumen; 22-spaced subchambers; 23-an air outlet cavity; 24-expanding the pores;
3-plugging the bottom of the pipe;
4-plugging the top of the pipe;
51-a divider plate; 52-silicone rubber tube;
6-gas source; 61-a pressure reducing valve; 62-pressure gauge; 63-a stop valve; 64-a pressurized tube;
7-branch pipe; 71-a pressurized hole;
81-air distribution chamber; 82-a well cover;
91-binding tapes; 92-sealing ring.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "inside", "outside", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "connected" and "connected" are to be interpreted broadly, e.g., as being fixed or detachable or integrally connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in a specific case to those of ordinary skill in the art.
Example one
Referring to fig. 2, the present embodiment provides a method for promoting permeation under constant pressure, which includes:
in step S1, a plurality of precipitation wells 12 are constructed around the precipitation required area a.
And step S2, constructing a plurality of pressurized wells 11 at intervals at the middle positions between the area A needing to be dewatered and the environmental facility B to be protected.
In step S3, a pressurizing device is provided in the pressurizing well 11, and the pressurizing device can introduce gas into the pressurizing well 11 to increase the pressure in the pressurizing well 11.
In step S4, a precipitation device is provided in the precipitation well 12, and the precipitation device can pump out the water in the precipitation well 12.
Referring to fig. 1, fig. 1 is a schematic diagram of a construction of a region a ' to be precipitation treated in the prior art, in which a plurality of precipitation wells 1 ' are constructed around the region a ', groundwater in the region a ' to be precipitation can permeate into the precipitation wells 1 ', and an operator can pump out water in the precipitation wells 1 ', so as to achieve the purpose of precipitation of the region a ' to be precipitation. However, in the process of precipitation operation, along with the dissipation of the pore water pressure of the soil layer and the increase of the effective stress, the soil around the area A' to be subjected to precipitation can be consolidated and compacted, which easily causes uneven settlement of the ground layer and can cause damage to roads, buildings and underground pipelines in the engineering range.
In this embodiment, referring to fig. 2, a plurality of pressurized wells 11 are constructed at intervals at an intermediate position between the area a to be dewatered and the environmental facility B to be protected, and a pressurizing device is disposed in the pressurized wells 11, so that the pressurizing device can introduce gas into the pressurized wells 11 to increase the pressure in the pressurized wells 11. Therefore, the gas in the pressurized well 11 can permeate into the surrounding soil body through the pressurized well 11, wherein part of the gas permeates and diffuses into the area A to be dewatering, so that the air pressure of the soil body in the area A to be dewatering is increased, pressure is formed on water in soil body gaps, the water enters the dewatering well 12 through the side wall of the dewatering well 12, and the water in the dewatering well 12 is pumped out through the dewatering device. The air pressure injected into the soil body through the pressurizing device is used for replacing water discharged from gaps of the soil body, so that the compaction deformation generated by the increase of effective stress in the water draining process is effectively reduced, and the effect of stabilizing the pressure is achieved; in addition, in the air pressure injection process, the process of discharging water from the soil body is accelerated, the problem of common soil layer drying effect is effectively improved, and the effect of 'permeation promotion' is achieved. Therefore, the pressure stabilizing and permeation promoting method has the advantages that the air pressure injected into the soil body of the area A to be dewatered through the pressurizing device forces the water in the soil layer of the area A to be dewatered to be effectively discharged in the air pressure injection process, the process of discharging the water in the soil layer is accelerated, the effect of effectively improving the drainage of the cohesive soil layer and quickly dewatering the area A to be dewatered is realized for the area A to be dewatered, and the outstanding problems that the drainage difficulty of the partial cohesive soil layer in the area A to be dewatered is high and the engineering self risk is overlarge due to water retention are effectively solved.
In addition, partial gas can also permeate and diffuse into the area B of the environment facility to be protected, so that the air pressure of the soil body in the area B of the environment facility to be protected is increased, and the pore air pressure in the soil body is increased, wherein the air pressure injected into the soil body through the pressurizing device can replace the water discharged from the gaps of the soil body in the area B of the environment facility to be protected, so that the compaction deformation generated by the increase of the effective stress in the water draining process is effectively reduced, namely, the pressure stabilizing effect is achieved, namely, the water in the soil body in the area B of the environment facility to be protected is replaced through the air pressure, the compaction of the soil body caused by the increase of the effective stress in the water discharging process in the soil layer is inhibited, and the risk of deformation of the soil body in the area B of the environment facility to be protected can be effectively controlled.
In conclusion, the pressure-stabilizing infiltration promoting method can ensure the effective drainage effect of the soil body in the area A needing to be dewatered, can reduce the risk of deformation of the soil body in the area B of the environmental facility to be protected, effectively ensures the smooth promotion of engineering construction, and has remarkable economic and social benefits.
Preferably, in this embodiment, step S2 includes: firstly, lofting at the middle position between the area A needing to be lowered and the environmental facility B to be protected to obtain the construction position of the pressurized well 11, marking the construction position, leveling the marked position, removing impurities, and then performing artificial exploratory well construction at the marked position to form the pressurized well 11.
Optionally, the diameter of the exploratory well is 1m, the depth of the exploratory well is 2m, the exploratory well is excavated by adopting an artificial Luoyang shovel below 2m, the exploratory hole depth is 6m, the exploratory hole interval is 100mm, the exploratory holes are arranged along the periphery of the exploratory well, the total exploratory hole depth is 8m, the drilling machine can be used for forming holes after confirming that no pipeline exists, and the hole diameter is about 108 mm.
In addition, optionally, the hole depth of the drilling implementation is not less than 3m below the designed water level, and the hole cleaning work is carried out, so that the sediment (soil deficiency) at the bottom of the hole meets the quality requirement and the design requirement, and good conditions are created for hole forming under the condition of pressure stabilization and penetration promotion. And (4) drilling to a designed height, and after the hole depth, the hole diameter and the hole deflection meet the requirements through inspection, completely pumping the drilling slag.
Example two
The second embodiment provides a pressurized precipitation device, the pressure stabilizing and permeation promoting method of the first embodiment uses the pressurized precipitation device of the present embodiment, the technical features of the pressure stabilizing and permeation promoting method disclosed in the first embodiment are also applicable to the second embodiment, and the technical features of the pressure stabilizing and permeation promoting method disclosed in the first embodiment are not described repeatedly. Embodiments of the pressurized precipitation apparatus are described in further detail below with reference to the accompanying drawings.
The pressurized precipitation equipment that this embodiment provided includes above-mentioned pressure device and precipitation device. That is, the pressure-stabilizing infiltration promoting method needs to use the pressurized precipitation equipment of the embodiment for operation. The pressurizing device is arranged in the pressurizing well 11 and used for introducing gas into the pressurizing well 11 so as to increase the gas pressure in the pressurizing well 11; the precipitation device is arranged in the precipitation well 12 and is used for pumping out the water in the precipitation well 12.
Preferably, referring to fig. 3 and 4, in the present embodiment, the pressurizing device includes a housing 2 and an air intake system; the shell 2 is provided with an inner cavity 21 and an air outlet (not shown in the figure) communicated with the inner cavity 21, and an air inlet system can supply air to the inner cavity 21; the shell 2 is arranged in the pressurized well 11, and the air inlet system supplies air to the inner cavity 21 to enable air pressure to enter the pressurized well 11 through the air outlet.
With such an arrangement, the pressure in the pressurized well 11 is increased, so that the gas in the pressurized well 11 can permeate into the surrounding soil through the pressurized well 11 to replace the water in the soil.
Preferably, in this embodiment, referring to fig. 3, the inner cavity 21 penetrates through the casing 2, the bottom end of the casing 2 is sealed by the bottom plug 3, and the gap between the top end of the casing 2 and the pressurized well 11 is sealed by the top plug 4.
Preferably, in this embodiment, the pressurizing device further comprises a pressure separation system; the pressure isolation system enables the interior of the pressurized well 11 to be partitioned into a plurality of pressure zones 111 along the depth of the pressurized well 11.
In the soil layer, according to different water level descending depths, the effective stress in the water level descending range linearly increases along with the depths. Therefore, in order to effectively avoid the implementation effect that the ground surface bulges or the pressure of the injection cannot be stabilized and promoted due to the fact that the pressure of the injection of the pressurizing device is too large or too small, in the embodiment, the inside of the pressurizing well 11 is divided into a plurality of pressure zones 111 through the pressure separation system, and the gas with different pressures is introduced into different pressure zones 111, so that the pressure control at different depth positions in the pressurizing well 11 is realized.
Preferably, referring to fig. 4, in the present embodiment, the pressure separation system includes a plurality of partition plates 51 arranged at intervals along the depth direction of the inner cavity 21, the partition plates 51 separate the inner cavity 21 into a plurality of sub-cavities, and two adjacent sub-cavities are respectively a separation sub-cavity 22 and an air outlet sub-cavity 23; the pressure separation system further comprises a plurality of pressurization deformable silicone rubber tubes 52, the silicone rubber tubes 52 are arranged in a plurality, and the silicone rubber tubes 52 are all sleeved outside the shell 2 and correspond to the plurality of spaced sub-cavities 22 one by one.
Referring to fig. 5 and 6, both ends of the silicone rubber tube 52 are fixedly connected to the casing 2 along the depth direction of the silicone rubber tube 52, and the silicone rubber tube 52 includes a middle portion that expands in a direction away from the casing 2 to a first state contacting the wall of the pressurized well 11 and a second state in which the middle portion is tightly attached to the casing 2. Referring to fig. 5, when the silicone rubber tube 52 is in the first state, the silicone rubber tube 52 divides the inside of the pressurized well 11 into a plurality of pressure zones 111 along the depth direction of the pressurized well 11.
That is to say, the interval sub-cavity 22 is provided with a plurality of, the air outlet sub-cavity 23 is provided with a plurality of, and the interval sub-cavity 22 and the air outlet sub-cavity 23 are arranged in sequence at intervals, and the silicone rubber tube 52 is sleeved outside the interval sub-cavity 22.
Referring to fig. 5, when the silicone rubber tube 52 is in the first state, the silicone rubber tube 52 includes an intermediate portion that expands away from the housing 2 to contact with a wall of the pressurized well 11, so as to partition the pressurized well 11 along the depth direction, such that a portion of the pressurized well 11 corresponding to the partition chamber 22 becomes a partition region, and a portion of the pressurized well 11 corresponding to the gas outlet chamber 23 forms a pressure partition region 111. That is, the pressure sub-area 111 is located in the pressure well 11 corresponding to the gas outlet sub-chamber 23, the adjacent pressure sub-areas 111 are separated by the silicone rubber tube 52 located in the separation sub-chamber 22, and the silicone rubber tube 52 located in the separation sub-chamber 22 forms a separation line of the adjacent pressure sub-areas 111.
At this moment, the gas of different atmospheric pressures is let in respectively to the branch chamber 23 of giving vent to anger of difference through air intake system to the gas can let in the atmospheric pressure of different atmospheric pressures to different pressure subregion 111 through the venthole of casing 2 and be convenient for realize the atmospheric pressure control of different degree of depth positions department in pressurized well 11.
Referring to fig. 6, when the pressurizing device is not used, the silicone rubber tube 52 is in the second state, the middle part of the silicone rubber tube 52 is tightly attached to the housing 2, so that a gap is formed between the silicone rubber tube 52 and the wall of the pressurizing well 11, and the pressurizing well 11 does not have a pressure partition 111.
Preferably, referring to fig. 3 and 4 in combination with fig. 7, in the present embodiment, the air inlet system includes an air source 6 and an air inlet mechanism, the air inlet mechanism includes a pressurization pipe 64 connected to the air source 6 and a plurality of branch assemblies connected to the pressurization pipe 64, and the number of the branch assemblies is the same as the number of the air outlet branch cavities 23; the branch assembly comprises a branch pipe 7 provided with a pressurizing hole 71 and a discharge hole, the branch pipe 7 is communicated with the pressurizing pipe 64, the branch pipe 7 penetrates through the interval sub-cavity 22 and extends into the gas outlet sub-cavity 23, the pressurizing hole 71 is arranged in the interval sub-cavity 22, and the discharge hole is arranged in the gas outlet sub-cavity 23; the pressurizing holes 71 of each branch pipe 7 are correspondingly arranged in one interval branched cavity 22, the row holes of each branch pipe 7 are correspondingly arranged in one outlet branched cavity 23, the pressurizing holes 71 of different branch pipes 7 are respectively arranged in different interval branched cavities 22, and the row holes of different branch pipes 7 are respectively arranged in different outlet branched cavities 23; the air outlet hole is arranged at the position of the shell 2 corresponding to the air outlet sub-cavity 23, and the expansion hole 24 is arranged at the position of the shell 2 corresponding to the spacing sub-cavity 22.
In such an arrangement, each partition cavity 22 is provided with a pressurizing hole 71 of one branch pipe 7, each outlet cavity 23 is provided with a row hole of one branch pipe 7, the branch pipes 7 of the pressurizing holes 71 in different partition cavities 22 are different, and the branch pipes 7 of the row holes in different outlet cavities 23 are different.
Therefore, gas is introduced into the pressurizing pipe 64 through the gas source 6, the gas can enter different branch pipes 7 from the pressurizing pipe 64 respectively, each branch pipe 7 is aerated, the gas is introduced into the interval subchambers 22 through the pressurizing holes 71 of the branch pipes 7, the gas in the interval subchambers 22 can be contacted with the middle part of the silicone rubber pipe 52 through the expanding holes 24, so that the middle part of the silicone rubber pipe 52 is pressurized, the middle part is deformed, the middle part of the silicone rubber pipe 52 can be expanded to be contacted with the well wall of the pressurizing well 11 in the direction away from the shell 2, and the silicone rubber pipe 52 is in the first state; in addition, the gas in the branch pipe 7 can also be introduced into the gas outlet sub-cavity 23 through the discharge hole, so that the gas in the gas outlet sub-cavity 23 can enter the gap between the shell 2 and the pressurizing hole 71 through the gas outlet hole, that is, the pressure subarea 111 is filled with the gas, the gas can raise the gas pressure in the pressure subarea 111 of the pressurizing well 11, and therefore the gas in the pressurizing well 11 can permeate into the surrounding soil body through the pressurizing well 11. Used for replacing water drained out of the soil body.
When the pressurizing device is not used, the gas source 6 is closed, and the branch pipe 7 does not contain gas, so that the silicone rubber pipe 52 cannot be pressurized and deformed, and the silicone rubber pipe 52 is in the second state.
Therefore, the branch pipes 7 can supply air to the spaced sub-cavities 22 to pressurize the silicone rubber pipe 52 so as to enable the silicone rubber pipe 52 to be deformed in a first state, supply air to the air outlet sub-cavities 23 to supply air to the pressure partitions 111 of the pressurized well 11 so as to form a pressure stabilizing and permeation promoting effect on the soil body, and simultaneously, the air with different air pressures can be introduced to different pressure partitions 111 by introducing air with different pressures into different branch pipes 7 so as to realize air pressure control at different depth positions in the pressurized well 11.
Preferably, referring to fig. 3, in the present embodiment, the branch assembly further includes a pressure reducing valve 61, a pressure gauge 62 and a stop valve 63, all disposed on a side of the branch pipe 7 close to the pressure pipe 64.
This is arranged so as to control the pressure of the gas introduced into the outlet chamber 23 by the branch pipe 7 and thus to control the pressure of the gas introduced into the pressure compartment 111 of the pressurized well 11.
Preferably, referring to fig. 3, a groove is dug at the upper end of the pressurized well 11 and concrete is poured, so that an air distribution chamber 81 is formed at the upper end of the pressurized well 11, the air distribution chamber 81 is covered by a well cover 82, and a pressure reducing valve, a pressure gauge and a stop valve are all arranged in the air distribution chamber.
Preferably, referring to fig. 6, in the present embodiment, the pressure separation system further includes a fixing mechanism, and both ends of the silicone rubber tube 52 are fixedly connected to the housing 2 through the fixing mechanism; the fixing mechanism comprises a ribbon 91 sleeved on one side of the silicone rubber tube 52 far away from the shell 2 and a sealing ring 92 arranged between the ribbon 91 and the silicone rubber tube 52.
In this arrangement, the two ends of the silicone rubber tube 52 are fixed to the housing 2 by the bands 91, and the air pressure in each pressure section 111 is not communicated by the seal rings 92.
Preferably, referring to fig. 4 and 5, in the present embodiment, a plurality of sealing rings 92 are provided, so as to further enhance the reliability and firmness of the silicone rubber tube 52 fixed to the housing 2.
Preferably, in this embodiment, the precipitation device includes a drain pipe arranged in the precipitation well 12 and a drain water pump connected to the drain pipe; the drainage pump can pump out the water in the dewatering well 12 through the drainage pipe.
With the arrangement, when the water in the dewatering well 12 needs to be pumped out, the drainage water pump is started so as to pump out the water in the dewatering well 12 through the drainage pipe, and the purpose of dewatering is achieved.
It is to be added that the process of using the pressurized precipitation equipment of the embodiment to perform the operation of the pressure stabilizing infiltration promoting method is as follows:
a plurality of dewatering wells 12 are constructed around the area A needing to be dewatered, and a plurality of pressure wells 11 are constructed at intervals at the middle position between the area A needing to be dewatered and the environmental facility B to be protected. Arranging a pressurizing device in the pressurizing well 11, wherein the pressurizing device can introduce gas into the pressurizing well 11 so as to increase the air pressure in the pressurizing well 11; a precipitation device is arranged in the precipitation well 12, and the precipitation device can pump out water in the precipitation well 12.
According to the design outline of the site precipitation project, the number of the sections of the pressure subareas 111 and the pressure subarea arrangement in each pressure subarea 111 are determined, and the cutting length of each branch pipe 7 is determined.
And (3) lofting the middle position between the area A needing to be dewatered and the environmental facility B to be protected to obtain the construction position of the pressurized well 11, marking the position, leveling the marked position, removing impurities, and drilling the marked position to form the pressurized well 11.
And (4) digging a groove at the upper end of the pressurized well 11 on site and pouring concrete to form a gas distribution chamber.
The pipe bottom block, the shell 2, the pressure pipe 64 and each branch pipe 7 are connected to the ground, and the partition plate 51 is connected to the shell 2 according to the length of the branch pipe 7 determined in the above process.
First, a ground pressure stabilization test was conducted to observe whether or not the partition plate 51 was effectively opened and the pressurizing pipe 64 was not leaking gas, by introducing air into each branch pipe 7.
The pipe bottom plugging, the shell 2, the pressurizing pipe 64 and each branch pipe 7 are arranged in the pressurizing well 11, and the verticality and the placing depth accuracy of the equipment are ensured.
Each branch pipe 7 at the top position of the pressurized well 11 is sequentially connected with a stop valve, a pressure gauge and a pressure reducing valve, and is connected with a pressurized pipe 64 and an air source 6, and the top position of the pressurized well 11 is used for sealing the gap between the shell 2 and the pressurized well 11 through pipe top plugging.
And opening a switch of the gas source 6, injecting gas pressure with a specific value into different pressure partitions 111, continuously paying attention to the reading of the pressure gauge, and keeping the pressure stable to be close to the designed pressure value. And paying attention to the deformation development condition of the area B of the environment facility to be protected, and carrying out equipment airtightness inspection once the deformation of the area B of the environment facility to be protected is continuously developed.
And (4) continuously operating the pressurizing and dewatering equipment, removing the pressurizing and dewatering equipment after the dewatering well stops pumping water, and backfilling the pressurizing hole 71.
The pressurized precipitation apparatus of this embodiment has the advantages of the pressure-stabilizing infiltration-promoting method of the first embodiment, which are described in detail in the first embodiment, and will not be repeated here.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and these modifications or substitutions do not depart from the spirit of the corresponding technical solutions of the embodiments of the present invention.
Claims (10)
1. A method of stabilizing pressure to promote permeation, comprising:
step S1, constructing a plurality of precipitation wells around the area needing precipitation;
step S2, constructing a plurality of pressurized wells at intervals at the middle positions between the area needing to be dewatered and the environmental facility to be protected;
step S3, arranging a pressurizing device in the pressurizing well, wherein the pressurizing device can inject gas into the pressurizing well to increase the gas pressure in the pressurizing well;
and step S4, arranging a precipitation device in the precipitation well, wherein the precipitation device can pump out water in the precipitation well.
2. The method according to claim 1, wherein the step S2 comprises:
firstly, lofting at a middle position between a region needing to be dewatered and a facility to be protected and environment to obtain a construction position of a pressurized well, marking the position, and then leveling the marked position and removing impurities;
and then carrying out artificial exploratory well construction at the marked position to form the pressurized well.
3. A pressurized precipitation installation comprising the pressurizing means of claim 1 or 2 and precipitation means.
4. The pressurized precipitation apparatus of claim 3, wherein said pressurizing means comprises a housing and an air intake system;
the shell is provided with an inner cavity and an air outlet communicated with the inner cavity, and the air inlet system can supply air to the inner cavity;
the casing set up in the pressurized well, air intake system to the inner chamber air feed can make atmospheric pressure pass through the venthole gets into the pressurized well.
5. The pressurized precipitation apparatus of claim 4, wherein said pressurizing means further comprises a pressure separation system;
the pressure isolation system enables isolation within the pressurized well into a plurality of pressure zones along a depth direction of the pressurized well.
6. The pressurized precipitation device according to claim 5, wherein the pressure separation system comprises a plurality of separation plates arranged at intervals along the depth direction of the inner cavity, the separation plates divide the inner cavity into a plurality of sub-cavities, and two adjacent sub-cavities are a separation sub-cavity and an air outlet sub-cavity respectively;
the pressure separation system also comprises a plurality of pressurized deformable silicone rubber pipes, and the silicone rubber pipes are sleeved outside the shell and correspond to the spaced sub-cavities one by one;
follow the depth direction of silicone rubber tube, the equal rigid coupling in both ends of silicone rubber tube in the casing, just the silicone rubber tube includes that the intermediate part is to keeping away from the direction of casing expand to with the first state and the intermediate part of the wall of a well contact of pressurized-well hug closely in the second state of casing, the silicone rubber tube is in during the first state, follow the depth direction of pressurized-well, the silicone rubber tube makes separate for a plurality of pressure subregion in the pressurized-well.
7. The pressurized precipitation apparatus of claim 6 wherein said air inlet system comprises an air supply and an air inlet mechanism, said air inlet mechanism comprising a pressurized pipe connected to said air supply and a plurality of branch assemblies each connected to said pressurized pipe, said number of branch assemblies corresponding to the number of said air outlet chambers;
the branch assembly comprises a branch pipe provided with a pressurizing hole and a row of holes, the branch pipe is communicated with the pressurizing pipe, penetrates through the interval sub-cavity and extends into the air outlet sub-cavity, the pressurizing hole is formed in the interval sub-cavity, and the row of holes is formed in the air outlet sub-cavity;
the pressurizing holes of each branch pipe are correspondingly arranged in one of the interval sub-cavities, the row holes of each branch pipe are correspondingly arranged in one of the gas outlet sub-cavities, the pressurizing holes of different branch pipes are respectively arranged in different interval sub-cavities, and the row holes of different branch pipes are respectively arranged in different gas outlet sub-cavities;
the air outlet hole is formed in the position, corresponding to the air outlet sub-cavity, of the shell, and the expansion hole is formed in the position, corresponding to the interval sub-cavity, of the shell.
8. The pressurized precipitation apparatus of claim 7, wherein the branching assembly further comprises a pressure reducing valve, a pressure gauge and a stop valve, all disposed on a side of the branch pipe adjacent to the pressurized pipe.
9. The pressurized precipitation apparatus of claim 6, wherein said pressure separation system further comprises a fixing mechanism, and both ends of said silicone rubber tube are fixedly connected to said housing through said fixing mechanism;
the fixing mechanism comprises a binding belt and a sealing ring, wherein the binding belt is sleeved on one side of the silicon rubber pipe and far away from one side of the shell, and the sealing ring is arranged between the binding belt and the silicon rubber pipe.
10. The pressurized precipitation apparatus of any one of claims 3-9, wherein said precipitation device comprises a drain for being arranged in said precipitation well and a drain pump connected to said drain; the drainage water pump can pump out water in the precipitation well through the drainage pipe.
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