CN209975498U - Vacuum preloading drain pipe - Google Patents
Vacuum preloading drain pipe Download PDFInfo
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- CN209975498U CN209975498U CN201920616436.1U CN201920616436U CN209975498U CN 209975498 U CN209975498 U CN 209975498U CN 201920616436 U CN201920616436 U CN 201920616436U CN 209975498 U CN209975498 U CN 209975498U
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Abstract
The utility model discloses a vacuum prepressing drain pipe, including the top sealing layer, bottom cone and the central hydraulic pipe and the drainage sleeve pipe with the coaxial rigid coupling of bottom cone, the drainage sleeve pipe suit is in the outside of central hydraulic pipe, both ends and central hydraulic pipe sealing connection, be connected with a plurality of drain bars along circumference equipartition and the protection structure that permeates water in the outside of drainage sleeve pipe, the drain bar contains two kinds, one kind is horizontal drain bar, another kind is vertical drain bar, horizontal drain bar and vertical drain bar staggered arrangement, the protection structure that permeates water includes flexible permeable filling body and permeable protective sheath, flexible permeable filling body sets up between adjacent horizontal drain bar and vertical drain bar, the permeable protective sheath wraps up in the outside of flexible permeable filling body, horizontal drain bar and vertical drain bar; the top sealing layer is arranged on the tops of the flexible water-permeable filling body, the transverse drainage plate and the longitudinal drainage plate. The utility model has the advantages of short installation period, good drainage effect and repeated utilization.
Description
Technical Field
The utility model belongs to soft basic processing engineering field of ground, especially a vacuum preloading drain pipe.
Background
At present, a vacuum preloading drainage consolidation system adopted in soft geotechnical foundation treatment engineering needs to use a drainage plate for drainage consolidation, the commonly used drainage plate is made of plastics and is inserted into saturated soft soil foundations such as silt, dredger fill and the like according to the requirement of a certain distance, and water in the saturated soft soil foundations is sucked out through a prefabricated drainage channel on the plastic drainage plate by a vacuum pump. The plastic drainage plate is small in rigidity, large in flexibility, and required to be installed by special plate inserting equipment, the insertion depth of the plastic drainage plate is limited, the drainage plate cannot keep the initial vertical state during insertion in the water suction process of a vacuum pump, wave buckling can occur in the depth direction, and drainage consolidation of a soft foundation is influenced. In addition, this kind of drain bar need lay the sand cushion layer of certain thickness on soft soil foundation, and the normal drainage of drain bar is consolidated just can be guaranteed to seal membrane is laid at sand cushion layer top. The drain bar installation cycle is long, the drainage effect is relatively poor, and seal membrane and plastics drain bar are disposable consumptive material, unable used repeatedly, and construction cost is high.
Disclosure of Invention
The utility model discloses a solve the technical problem who exists among the known art and provide a vacuum preloading drain pipe, this drainage sleeve has that installation cycle is short, the drainage is effectual, reuse's advantage.
The utility model discloses a solve the technical scheme that technical problem that exists among the well-known technique took and be: a vacuum preloading drain pipe comprises a top sealing layer, a bottom conical head, a central hydraulic pipe and a drain sleeve, wherein the central hydraulic pipe and the drain sleeve are coaxially and fixedly connected with the bottom conical head, the drain sleeve is sleeved outside the central hydraulic pipe, two ends of the drain sleeve are hermetically connected with the central hydraulic pipe, a plurality of drain plates which are uniformly distributed along the circumferential direction and a water permeable protection structure of the drain plates are connected outside the drain sleeve, the drain plates comprise two types, one type is a transverse drain plate, the other type is a longitudinal drain plate, the transverse drain plate is provided with a transverse drain hole which is communicated with the drain sleeve and is vertical to the length direction of the drain sleeve, the longitudinal drain plate is provided with a longitudinal drain hole which is communicated with the drain sleeve and is parallel to the length direction of the drain sleeve, the transverse drain plate and the longitudinal drain plate are arranged in a staggered mode, and the water permeable protection structure comprises a flexible water permeable filling body and a water permeable, the flexible water-permeable filling body is arranged between the adjacent transverse drainage plates and the adjacent longitudinal drainage plates, and the water-permeable protective sleeve is wrapped on the outer sides of the flexible water-permeable filling body, the transverse drainage plates and the longitudinal drainage plates; the top sealing layer is arranged on the tops of the flexible water-permeable filling body, the transverse drainage plate and the longitudinal drainage plate.
On the basis of the above scheme, the utility model discloses following improvement has still been made:
the flexible water-permeable filling body is cellular engineering rubber.
The permeable protective sleeve is made of geotextile.
The top sealing layer is made of engineering silica gel.
The utility model has the advantages and positive effects that: the screw pile installation equipment is adopted for driving, the insertion depth is large, and the installation period is short; a plurality of high-vacuum prepressing water discharge pipes which can horizontally extend into the soft soil are arranged on a vertically arranged rotating shaft, so that the high-vacuum prepressing water discharge pipes can be flexibly assembled according to the actual engineering requirements, and the applicability is strong; the vacuum preloading drain pipe that many levels set up improves rigidity through loading hydraulic pressure, rotates through the pivot and will have the vacuum preloading drain pipe level of enough rigidity and push the weak soil in, and the degree of depth that the vacuum preloading drain pipe stretched into in the soil can reach about 20m, and coverage area is big, and vacuum preloading drain pipe pressure differential is little around, non-deformable, and drainage concreties effectually, concreties the drainage efficiency height. Through drainage channel evacuation, need not lay the sand bed course on soft soil foundation and lay the seal membrane at sand bed course top and just can carry out the drainage consolidation, required engineering material is few, drainage effect is good, can used repeatedly, and construction cost is low, and economic benefits is high.
Drawings
Fig. 1 is a schematic cross-sectional view of the present invention;
FIG. 2 is a cross-sectional view A-A of FIG. 1;
FIG. 3 is a cross-sectional view B-B of FIG. 1;
fig. 4 is a schematic view of an application structure of the present invention;
FIG. 5 is a schematic view of a screw pile in an application structure of the present invention;
fig. 6 is a schematic view of a pipe coil in an application structure of the present invention.
In the figure: 1. performing spiral pile; 1-1, passing through a pipe hole; 1-2, spiral wing; 2. a vacuum preloading drain pipe; 2-1, a central hydraulic pipe; 2-2, a drainage sleeve; 2-3, flexible water-permeable filling bodies; 2-4, a transverse drainage plate; 2-5, longitudinal drainage plates; 2-6, a water permeable protective sleeve; 2-7, a top sealing layer; 2-8, a conical head at the bottom; 3. a rotating shaft; 4. a motor; 5. a vacuum pump; 6. a main drainage pipe; 7. a hydraulic main pipe; 8. a hydraulic pump; 9. a pipe coil; 9-1, bearing I; 9-2, pipe groove; 9-3, the wall of the pipe groove; 9-4, an inlet and outlet pipe orifice; 10. and a bearing II.
Detailed Description
For further understanding of the contents, features and effects of the present invention, the following embodiments are exemplified and will be described in detail with reference to the accompanying drawings:
referring to fig. 1 to 3, a vacuum pre-pressed drain pipe 2 includes a top sealing layer 2-7, a bottom conical head 2-8, a central hydraulic pipe 2-1 coaxially and fixedly connected with the bottom conical head 2-8, and a drain sleeve 2-2, wherein the drain sleeve 2-2 is sleeved outside the central hydraulic pipe 2-1, two ends of the drain sleeve 2-2 are hermetically connected with the central hydraulic pipe 2-1, the outside of the drain sleeve 2-2 is connected with a plurality of drain plates and water permeable protection structures thereof uniformly distributed along the circumferential direction, the drain plates include two types, one type is a transverse drain plate 2-4, the other type is a longitudinal drain plate 2-5, the transverse drain plate 2-4 is provided with a transverse drain hole which is communicated with the drain sleeve 2-2 and is perpendicular to the length direction of the drain sleeve 2-2, the longitudinal drainage plates 2-5 are provided with longitudinal drainage holes which are communicated with the drainage sleeves 2-2 and are parallel to the length direction of the drainage sleeves 2-2, the transverse drainage plates 2-4 and the longitudinal drainage plates 2-5 are arranged in a staggered mode, the water permeable protection structure comprises flexible water permeable filling bodies 2-3 and water permeable protection sleeves 2-6, the flexible water permeable filling bodies 2-3 are arranged between the adjacent transverse drainage plates 2-4 and the adjacent longitudinal drainage plates 2-5, and the water permeable protection sleeves 2-6 are wrapped on the outer sides of the flexible water permeable filling bodies 2-3, the transverse drainage plates 2-4 and the longitudinal drainage plates 2-5; the top sealing layer 2-7 is arranged on the top of the flexible water-permeable filling body 2-3, the transverse drainage plates 2-4 and the longitudinal drainage plates 2-5.
Referring to fig. 4 to 6, the application device of the vacuum preloading drainage pipe 2 includes a vertically arranged screw pile 1, a rotating shaft 3 coaxially arranged with the screw pile 1 is installed in the screw pile 1, and the rotating shaft 3 is driven by a motor 4 and supported by a bearing ii 10. The rotating shaft 3 is of a hollow structure, a hydraulic main pipe 7 and a drainage main pipe 6 are arranged in the hollow structure of the rotating shaft 3 in a penetrating mode, the hydraulic main pipe 7 and the drainage main pipe 6 are connected with the rotating shaft 3 through a rotating supporting component, and when the rotating shaft 3 rotates, the hydraulic main pipe 7 and the drainage main pipe 6 are static. A vacuum pump 5 is connected to the main drain pipe 6, and a hydraulic pump 8 is connected to the main hydraulic pipe 7.
The pile body of the spiral pile 1 is provided with a plurality of pipe passing holes 1-1 and spiral wings 1-2 which are uniformly distributed along the spiral direction.
Install the pipe coil 9 that sets gradually from last to lower a plurality of levels set up on the outside of pivot 3, pipe coil 9 is fixed in the spiral pile 1, it is a plurality of pipe coil 9 is with a plurality of cross tube hole 1-1 one-to-one, pipe coil 9 pass through bearing I9-1 with pivot 3 is connected, coils above-mentioned vacuum preloading drain pipe 2 on pipe coil 9 to make vacuum preloading drain pipe 2 level wear out the correspondence cross tube hole 1-1, the top of vacuum preloading drain pipe 2 passes the lateral wall of pivot 3, the central hydraulic pressure pipe 2-1 of vacuum preloading drain pipe 2 with hydraulic pressure is responsible for 7 and is connected, the drain pipe 2-2 of vacuum preloading drain pipe 2 with the drain is responsible for 6 and is connected, the bottom of vacuum preloading drain pipe 2 is the free end. The vacuum preloading drain pipe 2 can be extended or retracted after hydraulic pressure is loaded and driven by the rotating shaft 3. The tube disk 9 is supported on the rotating shaft 3 by a bearing I9-1, and the tube disk 9 is kept still all the time when the rotating shaft 3 rotates.
When the device is installed, the application device is driven into a specified depth by adopting screw pile installation equipment, the motor 4 is started to rotate forwards, the hydraulic pump 8 is started simultaneously, and the rigidity of the vacuum preloading drain pipe 2 is strengthened under the action of hydraulic pressure; under the drive of motor, pivot 3 rotates, and the vacuum preloading drain pipe 2 that promotes rigidity grow stretches out screw pile 1 and penetrates in the soil body around, triggers until the stopper that is located vacuum preloading drain pipe 2 top, shows that vacuum preloading drain pipe 2 has all penetrated in the soil body, and motor 4 and hydraulic pump 8 close.
And starting a vacuum pump 5 on the surface of the soft soil foundation, and forming negative pressure of 60-100 kPa in a sealed annular space formed between the drainage sleeve 2-2 and the central hydraulic pipe 2-1 and the drainage main pipe 6, so that pore water in the soil body near the vacuum preloading drainage pipe 2 flows into the drainage sleeve 2-2 and is pumped to the surface of the foundation through the drainage main pipe 6. The horizontal pipe through the surface drains outside the consolidation zone.
And (3) turning off the vacuum pump 5 until the soil body reaches the preset strength, starting the motor 4 to rotate reversely, and pulling the vacuum preloading drain pipe 2 by the rotating shaft 3 to be coiled into the static pipe coil 9 until the stopper positioned at the free end of the vacuum preloading drain pipe 2 is triggered, so that the vacuum preloading drain pipe 2 is completely withdrawn. Then, taking out and recycling the application device by adopting spiral pile mounting equipment to be reused; and backfilling the pile holes by using sand and stone materials or soil materials to finish the soft soil foundation reinforcement.
When the vacuum preloading drainage pipe is used, the two ends of the vacuum preloading drainage pipe 2 are respectively provided with the limiting device, and the retraction length of the vacuum preloading drainage pipe 2 can be effectively controlled.
In the embodiment, the flexible water-permeable filling bodies 2-3 are made of honeycomb engineering rubber, and are firm and durable. The permeable protective sleeves 2-6 are made of geotextile, are economical and durable, and can effectively prevent the permeable channels from being blocked. The top sealing layers 2-7 are made of engineering silica gel, and are firm and durable.
The hydraulic pump 8 and the motor 4 are arranged at the top of the inner side of the screw pile 1, and the structure is compact. The hydraulic pump 8 and the motor 4 may also be mounted outside the screw pile 1. The vacuum pump 5 is arranged on the surface of the soft soil foundation. The hydraulic pressure is responsible for 7 through universal interface I with hydraulic pump 8 is connected, simple to operate, convenient to use. In a similar way, the main drainage pipe 6 is connected with the vacuum pump 5 through a universal interface II. The motor 4 is connected with the rotating shaft 3 through a gearbox. In order to facilitate the horizontal extension of the vacuum preloading drain pipe 2, a horizontal spiral pipe groove 9-2 with gradually enlarged diameter from inside to outside is arranged on the pipe tray 9, a pipe groove wall 9-3 is arranged on the pipe groove 9-2, an inlet and outlet pipe opening 9-4 opposite to the corresponding pipe passing hole 1-1 is arranged on the outer side of the pipe tray 9, and the inlet and outlet pipe opening 9-4 is connected with the pipe groove 9-2 and arranged along the tangential direction of the inlet and outlet of the pipe groove 9-2.
Application example:
the external diameter of the screw pile 1 is 2m, the pile length is 10m, the width of the screw wings 1-2 is 0.3m, the thread pitch is 0.5m, the diameter of the vacuum prepressing drain pipe 2 is 0.16m, the pipe length is 17m, and 30 discs of vacuum prepressing drain pipes 2 are arranged in the screw pile 1. According to design quantity and requirement, the vacuum preloading drainage pipes of the preset quantity are penetrated into the soft soil needing drainage to implement vacuum preloading, the area of a reinforced area is 200m multiplied by 200m, the depth is 10m, and the vacuum preloading drainage pipes 2 are adopted and can be completed within 1-2 months. And the existing drainage plate is adopted, and the number of construction people is the same, and the drainage plate needs 6-8 months.
Although the preferred embodiments of the present invention have been described with reference to the accompanying drawings, the present invention is not limited to the above-mentioned embodiments, which are only illustrative and not restrictive, and those skilled in the art can make many forms without departing from the spirit and scope of the present invention, which is within the scope of the present invention.
Claims (4)
1. A vacuum preloading drain pipe is characterized by comprising a top sealing layer, a bottom conical head, a central hydraulic pipe and a drain sleeve, wherein the central hydraulic pipe is coaxially and fixedly connected with the bottom conical head;
the water drainage device is characterized in that the outer side of the drainage sleeve is connected with a plurality of drainage plates which are uniformly distributed along the circumferential direction and a water permeable protection structure of the drainage plates, wherein one drainage plate is a transverse drainage plate, the other drainage plate is a longitudinal drainage plate, the transverse drainage plate is provided with a transverse drainage hole which is communicated with the drainage sleeve and is vertical to the length direction of the drainage sleeve, the longitudinal drainage plate is provided with a longitudinal drainage hole which is communicated with the drainage sleeve and is parallel to the length direction of the drainage sleeve, the transverse drainage plate and the longitudinal drainage plate are arranged in a staggered mode, the water permeable protection structure comprises a flexible water permeable filling body and a water permeable protection sleeve, the flexible water permeable filling body is arranged between the adjacent transverse drainage plate and the longitudinal drainage plate, and the water permeable protection sleeve wraps the flexible water permeable filling body, the transverse drainage plate and the longitudinal drainage plate;
the top sealing layer is arranged on the tops of the flexible water-permeable filling body, the transverse drainage plate and the longitudinal drainage plate.
2. The vacuum pre-pressed drain pipe according to claim 1, wherein the flexible water-permeable filling body is a honeycomb engineering rubber.
3. Vacuum pre-pressed drainage pipe according to claim 1, wherein the water-permeable protective jacket is made of geotextile.
4. The vacuum pre-stressed drain pipe of claim 1, wherein the top sealing layer is made of engineered silica gel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920616436.1U CN209975498U (en) | 2019-04-30 | 2019-04-30 | Vacuum preloading drain pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920616436.1U CN209975498U (en) | 2019-04-30 | 2019-04-30 | Vacuum preloading drain pipe |
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| CN209975498U true CN209975498U (en) | 2020-01-21 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201920616436.1U Active CN209975498U (en) | 2019-04-30 | 2019-04-30 | Vacuum preloading drain pipe |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109944231A (en) * | 2019-04-30 | 2019-06-28 | 交通运输部天津水运工程科学研究所 | A kind of vacuum preloading drainpipe |
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2019
- 2019-04-30 CN CN201920616436.1U patent/CN209975498U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109944231A (en) * | 2019-04-30 | 2019-06-28 | 交通运输部天津水运工程科学研究所 | A kind of vacuum preloading drainpipe |
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