CN113550292A - Foundation drainage method and system - Google Patents
Foundation drainage method and system Download PDFInfo
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- CN113550292A CN113550292A CN202010325112.XA CN202010325112A CN113550292A CN 113550292 A CN113550292 A CN 113550292A CN 202010325112 A CN202010325112 A CN 202010325112A CN 113550292 A CN113550292 A CN 113550292A
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- drainage
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D3/00—Improving or preserving soil or rock, e.g. preserving permafrost soil
- E02D3/02—Improving by compacting
- E02D3/10—Improving by compacting by watering, draining, de-aerating or blasting, e.g. by installing sand or wick drains
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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Structural Engineering (AREA)
- Agronomy & Crop Science (AREA)
- Environmental & Geological Engineering (AREA)
- Soil Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
Abstract
The invention discloses a foundation drainage method and a foundation drainage system. The foundation drainage method according to the embodiment of the invention comprises the following steps: implanting a vertical drainage main pipe with a plurality of layers of separation layers and a plurality of water pumping sub-pipes in the foundation; the top end and the upper side wall of the drainage main pipe are closed, and a plurality of filtering holes are formed in the lower side wall of the drainage main pipe; adjusting the depth arrangement of the separation layer to form a multilayer drainage cavity; inserting the water pumping sub-pipe into the drainage cavity; and draining the foundation through the water pumping sub-pipe. According to the foundation drainage method and the foundation drainage system, accurate layered vacuum air suction drainage can be performed on soil bodies of all layers according to the difference of permeability coefficients of the soil layers, the air displacement of the soil bodies with the difference of the permeability coefficients is increased, the drainage time of the soil layers is prolonged, the traditional vacuum dewatering method and the traditional construction method are replaced, the well diameter is increased, the dewatering path is shortened, and the deep soft soil dewatering effect is improved.
Description
Technical Field
The invention relates to the technical field of foundation treatment, in particular to the technical field of soft foundation soil body layering precipitation and soft soil reinforcement treatment, and particularly relates to a foundation drainage method and a foundation drainage system.
Background
Along with the needs of economic construction development in China, along with the rapid development of coastal beach reclamation development, the geological conditions of soil bodies such as silt, silt sand, silt quality and the like are more and more complex, and a plurality of uncertain factors such as the stability, uniformity, rock-soil property, chemical compositions and corrosivity of a foundation are more and more increased. The soil body is formed with diversity and complexity, and particularly, the soil body is artificially formed and filled, the formation of the soil layer is more complicated, and the soil layer is unevenly distributed. The difference in soil property between layers results in a more complex difference in permeability coefficient between soil layers.
In the prior art, the precipitation process has no pertinence on the soil body with large difference of permeability coefficients, so that the precipitation is insufficient or excessive, and the water content of the mucky soil body cannot meet the requirement of the dynamic compaction process.
Accordingly, it is desirable to have a new method and system for draining foundation that overcomes the above-mentioned problems.
Disclosure of Invention
In view of the above problems, it is an object of the present invention to provide a method and system for draining water from a foundation, which can increase the amount of water drained from soft soil having poor permeability and improve the effect of precipitation.
According to an aspect of the present invention, there is provided a method of draining a foundation, comprising the steps of: implanting a vertical drainage main pipe with a plurality of layers of separation layers and a plurality of water pumping sub-pipes in the foundation; the top end and the upper side wall of the drainage main pipe are closed, and a plurality of filtering holes are formed in the lower side wall of the drainage main pipe; adjusting the depth arrangement of the separation layer to form a multilayer drainage cavity; inserting the water pumping sub-pipe into the drainage cavity; and draining the foundation through the water pumping sub-pipe.
Preferably, the foundation drainage method further comprises: leveling a construction site; determining the implantation depth and the implantation position of the drainage main pipe, and the distance among a plurality of drainage main pipes; and drilling, mud wall protection and hole cleaning on the foundation to form a hole for implanting the drainage main pipe.
Preferably, said inserting said water-drawing sub-tube into said drainage cavity comprises: drawing the pumping sub-pipes to enable the drainage ends of the pumping sub-pipes to enter different drainage cavities, wherein each drainage cavity comprises the drainage end of at least one pumping sub-pipe; connecting the water pumping sub-pipe to different vacuum drainage systems according to the exhaust volume of the water pumping sub-pipe; and respectively draining water for each drainage cavity.
Preferably, the depth of the drainage female pipe is 9 meters.
According to another aspect of the present invention, there is provided a foundation drainage system comprising: the drainage main pipe is used for draining the foundation, and a plurality of filtering holes are formed in the side wall of the lower part of the drainage main pipe; the separation layer is arranged inside the drainage main pipe and is used for separating the inner cavity of the drainage main pipe into a plurality of drainage cavities; and the water pumping sub-pipe is connected with the drainage main pipe and used for draining water, and the drainage end of the water pumping sub-pipe is positioned in the drainage cavity.
Preferably, the drain header further includes: the top cover is positioned at the top end of the drainage main pipe and used for sealing the drainage main pipe; and the bottom cover is positioned at the bottom end of the drainage main pipe, and a filtering hole is formed in the bottom cover.
Preferably, the material of the drainage main pipe is galvanized steel or polyvinyl chloride.
Preferably, the separation layer comprises: a rigid polyvinyl chloride plate for forming the drainage cavity; and the sealing rings are positioned around the rigid polyvinyl chloride plate, are in contact with the inner wall of the drainage main pipe and are used for fixing the separation layer and sealing the drainage cavity.
Preferably, the material of the water pumping sub-pipe is polyvinyl chloride.
Preferably, the foundation drainage system further comprises: and the vacuum drainage device is connected with the water pumping sub-pipe and is used for draining the foundation, wherein the water pumping sub-pipe is connected to different vacuum drainage devices according to different air displacement.
The foundation drainage method and the foundation drainage system provided by the embodiment of the invention are provided with a plurality of drainage cavities, and can be used for performing accurate layered vacuum air suction drainage on soil bodies on each layer according to the difference of soil layer permeability coefficients, so that the soil body displacement with the difference of the permeability coefficients is increased, and the drainage time of the soil layer is prolonged.
According to the foundation drainage method and the foundation drainage system, the drainage stratum is accurately positioned by adjusting the depth arrangement of the separation layer, so that a multilayer drainage cavity is formed; the bottom end of the pumping sub-pipe is drawn into different drainage cavities, and vacuum is applied to the stratum with different depths, so that accurate drainage is realized.
The foundation drainage method and the foundation drainage system can replace the traditional vacuum dewatering method, increase the well diameter, shorten the dewatering path and improve the dewatering effect of deep soft soil.
According to the foundation drainage method and the foundation drainage system, through the effects of drainage of the mother pipe, separation in the mother pipe and targeting, the water molecule flow of the soil body with weak water permeability is accelerated, the vacuum dewatering time is accelerated, the rapid solidification of a soft foundation is promoted, the strength of deep soft soil is improved, and the settlement and differential settlement after foundation construction are reduced.
According to the foundation drainage method and the foundation drainage system, the stability of high vacuum degree is ensured in the precipitation process, the precipitation effect is improved, the working state can be randomly converted, and the drainage quantity of soft soil with poor permeability is increased.
According to the foundation drainage method and the foundation drainage system, the consolidation of the soft soil foundation is accelerated by the drainage of the main pipe, the separation in the main pipe and the targeting effect, and the construction period can be shortened by one third compared with the conventional construction period; the foundation drainage method and the system are safe and applicable, advanced in method, economical and reasonable and guarantee in quality.
Drawings
The above and other objects, features and advantages of the present invention will become more apparent from the following description of the embodiments of the present invention with reference to the accompanying drawings, in which:
FIG. 1 is a schematic diagram illustrating an application scenario of a foundation drainage system according to an embodiment of the present invention;
FIG. 2 shows a schematic structural diagram of a foundation drainage system according to an embodiment of the invention;
FIG. 3 shows a method flow diagram of a method of draining a foundation according to an embodiment of the invention.
Detailed Description
Various embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. Like elements in the various figures are denoted by the same or similar reference numerals. For purposes of clarity, the various features in the drawings are not necessarily drawn to scale. Moreover, certain well-known elements may not be shown in the figures.
The following detailed description of embodiments of the present invention is provided in connection with the accompanying drawings and examples. In the following description, numerous specific details of the invention, such as structure, materials, dimensions, processing techniques and techniques of components, are set forth in order to provide a more thorough understanding of the invention. However, as will be understood by those skilled in the art, the present invention may be practiced without these specific details.
It will be understood that when a layer, region or layer is referred to as being "on" or "over" another layer, region or layer in describing the structure of the component, it can be directly on the other layer, region or layer or intervening layers or regions may also be present. Also, if the component is turned over, one layer or region may be "under" or "beneath" another layer or region.
Fig. 1 is a schematic view illustrating an application scenario of a foundation drainage system according to an embodiment of the present invention. Fig. 2 shows a schematic structural view of a foundation drainage system according to an embodiment of the present invention. As shown in fig. 2, the foundation drainage system according to the embodiment of the present invention includes a drainage main pipe 1, a pumping sub pipe 2, and a separation layer 3.
Specifically, the drainage header 1 is used for drainage of a foundation. A plurality of filtering holes are formed on the lower side wall of the drainage main pipe 1. Alternatively, the drain main 1 is made of galvanized steel or polyvinyl chloride (PVC). The top of the drainage main pipe 1 is provided with filtering holes with the pore ratio not less than 15% below two meters. Optionally, the outer wall of the drainage main pipe 1 is wrapped with geotextile. Optionally, the pipe diameter of the drainage main pipe 1 is 110 mm.
The separate layer 3 is arranged inside the drainage main pipe 1 and is used for separating the inner cavity of the drainage main pipe 1 into a plurality of drainage cavities. One or more separation layers 3 are arranged in the drainage main pipe 1. Optionally, the separation layer 3 comprises a rigid polyvinyl chloride plate and a sealing ring. Rigid pvc sheets are used to form drainage cavities. The periphery (outer edge) of the hard polyvinyl chloride plate is provided with a sealing ring. The seal ring is, for example, a rubber seal ring. The sealing washer contacts with the inner wall of female pipe 1 of drainage, plays the sealing effect, realizes the sealed of drainage cavity to play the fixed action, fix separate layer 3 in female pipe 1 of drainage. The position of the separation layer 3 in the drainage header 1 can be adjusted according to actual needs. Optionally, the diameter of separate layer 3 is 5mm less than the internal diameter of female pipe 1 of drainage, and the 3 outer fringe of separate layer is provided with the sealing washer, inlays at separate layer 3 and the female pipe 1 inner wall of drainage, and both can seal and can adjust the removal from top to bottom. Optionally, the thickness of the separation layer 3 is not less than 20 mm.
The water pumping sub-pipe 2 is connected with the main drainage pipe 1 and used for draining water. The water pumping sub-pipe 2 is a PVC pipe with the outer diameter of 32 mm. One or more water pumping sub-pipes 2 are arranged in the main drainage pipe 1. Optionally, (the drain end of) the pumping sub-pipe 2 passes through the separation layer 3 into the drain chamber. Optionally, the water pumping sub-pipes 2 are respectively connected to different vacuum drainage systems according to the requirement of the exhaust gas volume.
In an alternative embodiment of the invention, the foundation drainage system further comprises a top cover 4 and a bottom cover 5. The top cover 4 is positioned at the top end of the drainage main pipe 1 and is used for sealing the drainage main pipe 1. The cap 4 is for example a hard plastic product. The bottom cover 5 is positioned at the bottom end of the drainage main pipe 1. The bottom cover 5 is provided with a filter hole. The bottom cover 5 is, for example, a hard plastic product. Optionally, the bottom cover 5 is wrapped with geotextile. Optionally, the water extraction sub-pipe 2 passes through the top cover 4 and the separation layer 3 into the water extraction main pipe 1. Alternatively, the part of the pumping sub-pipe 2 outside the top cover 4 is connected to a vacuum drainage device, and the pumping sub-pipe 2 can be connected to different vacuum drainage devices according to the requirement of the exhaust gas volume. For example, the pumping sub-pipe 2 is connected to a vacuum drainage pump, the exhaust air per minute is not less than 500 cubic meters, and the suction vacuum degree is not less than 0.09 KPa.
In an alternative embodiment of the invention, the foundation drainage system further comprises a vacuum drainage device connected with the water pumping sub-pipe 2 for draining the foundation. The water pumping sub-pipe 2 is connected to different vacuum drainage devices according to different exhaust gas volumes.
In an alternative embodiment of the invention, the foundation drainage system further comprises a ramming device. The tamping device is used for reinforcing the soft soil foundation by adopting a mode of vibration or dynamic compaction after the underground water level of the soil body meets the design requirement.
The ground-based drainage system according to the embodiment of the present invention is applied to a scene as shown in fig. 1, for example. The main drainage pipe 1 is embedded in the foundation, the main drainage pipe 1 is connected with a water pumping sub-pipe 2 (not shown in the figure), and a separation layer 3 (not shown in the figure) is arranged in the main drainage pipe 1. As shown in fig. 1, the soil mass being treated is divided into three layers, for example, from top to bottom. Accordingly, two separation layers 3 are provided in the drain header 1 to separate the internal cavity of the drain header 1 into three parts (drain cavities). Preferably, the position and thickness of the drainage cavity formed in the drainage main pipe 1 in a separated mode correspond to the position and thickness of different soil layers in the soil body. When the foundation drainage system according to the embodiment of the invention is used, negative pressure is generated in the drainage main pipe 1 (shown by negative signs in the figure). The soil body beside the drainage main pipe 1 is provided with positive pressure (shown by plus sign in the figure).
FIG. 3 shows a method flow diagram of a method of draining a foundation according to an embodiment of the invention. As shown in fig. 3, the method for draining foundation according to the embodiment of the present invention includes the steps of:
in step S301, a vertical drainage main pipe, in which a plurality of layers of separation layers and a plurality of water pumping sub-pipes are arranged, is implanted into a foundation; the top end and the upper side wall of the drainage main pipe are closed, and a plurality of filtering holes are formed in the lower side wall;
the method comprises the steps of implanting a vertical drainage main pipe internally provided with a plurality of layers of separation layers and a plurality of water pumping sub-pipes into a foundation, wherein the foundation is a soft foundation. The top end and the upper side wall of the drainage main pipe are closed, and a plurality of filtering holes are formed in the lower side wall. Optionally, the top of the drainage main pipe is provided with filter holes with a pore ratio of not less than 15% below two meters. Preferably, the outer wall of the drainage main pipe is wrapped by geotextile. Preferably, the drain header is implanted in the foundation by hydrostatic pressure.
In step S302, adjusting the depth arrangement of the separation layer to form a multi-layer drainage cavity;
and adjusting the depth arrangement of the separation layer to form a multilayer drainage cavity. By adjusting the longitudinal position (depth arrangement) of the separation layer in the drainage header, a plurality of (layer) drainage cavities are formed in the drainage header. Optionally, the drainage mother pipe is deep into the ground for 9 meters.
In step S303, a water pumping sub-pipe is inserted into the drainage cavity;
and inserting the water pumping sub-pipe into the drainage cavity. Preferably, the water pumping sub-pipe passes through the separation layer, so that the water discharging end (bottom end) of the water pumping sub-pipe is inserted into different water discharging cavities. Preferably, each drainage cavity includes a drainage end of at least one of the water extraction sub-pipes therein.
In step S304, the foundation is drained through the water pump sub-pipe.
And draining the foundation through the water pumping sub-pipe. For example, a vacuum drainage device connected with the water pumping sub-pipe is started, and the foundation is drained through the water pumping sub-pipe. Optionally, each drainage cavity is drained separately. Optionally, different water pumping sub-pipes are connected to different vacuum drainage devices according to different exhaust gas volumes to drain water. Preferably, the drainage is performed on the plurality of drainage cavities step by step from the top end of the drainage main pipe, and the upper soil layer after drainage is not influenced by the lower soil layer.
In an optional embodiment of the present invention, the foundation drainage method further comprises:
leveling a construction site;
determining the implantation depth and the implantation position of the drainage main pipe, and the distance among a plurality of drainage main pipes; and
and drilling, mud wall protection and hole cleaning on the foundation to form a hole implanted into the drainage main pipe.
In an optional embodiment of the present invention, the foundation drainage method further comprises:
after the water content of the foundation (soil body) meets the technological requirements, the soil body is vibrated or strongly compacted.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
While embodiments in accordance with the invention have been described above, these embodiments are not intended to be exhaustive or to limit the invention to the precise embodiments described. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, to thereby enable others skilled in the art to best utilize the invention and various embodiments with various modifications as are suited to the particular use contemplated. The invention is limited only by the claims and their full scope and equivalents.
Claims (10)
1. A method for draining foundation water, characterized by comprising the following steps:
implanting a vertical drainage main pipe with a plurality of layers of separation layers and a plurality of water pumping sub-pipes in the foundation; the top end and the upper side wall of the drainage main pipe are closed, and a plurality of filtering holes are formed in the lower side wall of the drainage main pipe;
adjusting the depth arrangement of the separation layer to form a multilayer drainage cavity;
inserting the water pumping sub-pipe into the drainage cavity; and
and draining the foundation through the water pumping sub-pipe.
2. The foundation drainage method of claim 1, further comprising:
leveling a construction site;
determining the implantation depth and the implantation position of the drainage main pipe, and the distance among a plurality of drainage main pipes; and
and drilling, mud wall protection and hole cleaning on the foundation to form a hole implanted into the drainage main pipe.
3. The foundation drainage method of claim 1, wherein said inserting the water extraction sub-pipe into the drainage cavity comprises:
by drawing the water pumping sub-pipe, the water discharging end of the water pumping sub-pipe enters different water discharging cavities,
wherein each drainage cavity comprises a drainage end of at least one water pumping sub-pipe;
connecting the water pumping sub-pipe to different vacuum drainage systems according to the exhaust volume of the water pumping sub-pipe;
and respectively draining water for each drainage cavity.
4. The foundation drainage method according to claim 1, wherein the depth of the drain pipe is 9 m.
5. A foundation drainage system, comprising:
the drainage main pipe is used for draining the foundation, and a plurality of filtering holes are formed in the side wall of the lower part of the drainage main pipe;
the separation layer is arranged inside the drainage main pipe and is used for separating the inner cavity of the drainage main pipe into a plurality of drainage cavities; and
and the water pumping sub-pipe is connected with the drainage main pipe and used for draining water, and the drainage end of the water pumping sub-pipe is positioned in the drainage cavity.
6. The foundation drainage system of claim 5, wherein the drainage header further comprises:
the top cover is positioned at the top end of the drainage main pipe and used for sealing the drainage main pipe; and
the bottom cover is positioned at the bottom end of the drainage main pipe, and a filtering hole is formed in the bottom cover.
7. The foundation drainage system of claim 5, wherein the material of the drainage header is galvanized steel or polyvinyl chloride.
8. The foundation drainage system of claim 5, wherein the separation layer comprises:
a rigid polyvinyl chloride plate for forming the drainage cavity; and
a sealing ring positioned around the rigid polyvinyl chloride plate,
the sealing ring is in contact with the inner wall of the drainage main pipe and used for fixing the separation layer and sealing the drainage cavity.
9. The foundation drainage system of claim 5 wherein the material of the water extraction sub-pipe is polyvinyl chloride.
10. The foundation drainage system of claim 5, further comprising:
a vacuum drainage device connected with the water pumping sub-pipe and used for draining the foundation,
wherein the water pumping sub-pipe is connected to different vacuum drainage devices according to different air displacement.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010325112.XA CN113550292A (en) | 2020-04-23 | 2020-04-23 | Foundation drainage method and system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010325112.XA CN113550292A (en) | 2020-04-23 | 2020-04-23 | Foundation drainage method and system |
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| CN113550292A true CN113550292A (en) | 2021-10-26 |
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| CN202010325112.XA Pending CN113550292A (en) | 2020-04-23 | 2020-04-23 | Foundation drainage method and system |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN202745033U (en) * | 2012-07-17 | 2013-02-20 | 沈卫清 | Movable and fixed drain pipe well |
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| CN105672244A (en) * | 2016-01-19 | 2016-06-15 | 南通大学 | Drainage device and system for strengthening soft clay foundation and treatment method |
| RU2609383C1 (en) * | 2016-01-11 | 2017-02-01 | Михаил Иванович Голубенко | Vacuum drainage system |
| CN106958240A (en) * | 2017-04-14 | 2017-07-18 | 沈艳忱 | Air-cushion type batch vacuum pipe well and apply its soft foundation Yield rainfall relation method |
| CN107100182A (en) * | 2017-05-17 | 2017-08-29 | 福建岩土工程勘察研究院 | Soft foundation cluster type layering precipitation no-arbitrary pricing pipe rams system and its construction method |
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2020
- 2020-04-23 CN CN202010325112.XA patent/CN113550292A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202745033U (en) * | 2012-07-17 | 2013-02-20 | 沈卫清 | Movable and fixed drain pipe well |
| JP2014190117A (en) * | 2013-03-28 | 2014-10-06 | Penta Ocean Construction Co Ltd | Drain material with cap used for vacuum consolidation drain construction method, and method for burying the same |
| RU2609383C1 (en) * | 2016-01-11 | 2017-02-01 | Михаил Иванович Голубенко | Vacuum drainage system |
| CN105672244A (en) * | 2016-01-19 | 2016-06-15 | 南通大学 | Drainage device and system for strengthening soft clay foundation and treatment method |
| CN106958240A (en) * | 2017-04-14 | 2017-07-18 | 沈艳忱 | Air-cushion type batch vacuum pipe well and apply its soft foundation Yield rainfall relation method |
| CN107100182A (en) * | 2017-05-17 | 2017-08-29 | 福建岩土工程勘察研究院 | Soft foundation cluster type layering precipitation no-arbitrary pricing pipe rams system and its construction method |
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