CN1063832C - Jet vacuum pump specially for strengthening weak ground by vacuum precompression method - Google Patents
Jet vacuum pump specially for strengthening weak ground by vacuum precompression method Download PDFInfo
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- CN1063832C CN1063832C CN 95104343 CN95104343A CN1063832C CN 1063832 C CN1063832 C CN 1063832C CN 95104343 CN95104343 CN 95104343 CN 95104343 A CN95104343 A CN 95104343A CN 1063832 C CN1063832 C CN 1063832C
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- vacuum
- jet
- jetting device
- liquid jetting
- centrifugal pump
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Abstract
The present invention belongs to a device for reinforcing foundation structures, which can further improve the function of jet vacuum pumps used by the 85108820 patent and enhance the efficiency. The present invention is composed of a jet box, an ejector, a centrifugal pump and a motor; the present invention is characterized in that the ejector is horizontally arranged and has the advantages that the height and the length of a vacuum connection pipe are shortened, the work efficiency is enhanced, the bearing vacuum pressure in the soil can reach 90 to 94KPa, and high reinforcing effect can be obtained; the present invention also provides a jet vacuum pump which can work under water; because a submersible motor is adopted and the structure is improved, the jet vacuum pump can be used for soft foundation reinforcement in the intertidal zone and under shallow water, and a new way is opened for vacuum pre-pressure soft foundation techniques.
Description
The invention belongs to the equipment of reinforcing structure foundation, it is specifically related to a kind of jetting stream vacuum pump structure that is used for the vacuum method construction.
To the reinforcing of the ground program that is absolutely necessary, it directly influences the quality of construction engineering, the reinforcing difficulty maximum of weak soil and super soft ground in foundation stabilization before building engineering construction.Entity loading method pre-pressing and reinforcing soft earth foundations such as accumulation load method have been replaced in recent years both at home and abroad widely with vacuum method.Key link in the vacuum method reinforcing flexible foundation technology is exactly to apply stable degree of vacuum to get rid of the G﹠W in the basic soil to the basis.Japan and the United States and European countries adopt vacuum pump to operate basically, and the deadly defect of vacuum pump is to work on long-time continuous ground, and the investment of this equipment is also higher in addition, works discontinuously to make the less stable of precompressed process.The research laboratory that the applicant presides over had once finished the achievement of " vacuum precompression consolidating method of soft soil foundation " subject study in 85 years, and applied for patent of invention 85108820, wherein adopted special-purpose jet vacuum pump, it is a general jet vacuum pump of just having introduced this new model after having broken through large size face of land sealing technology, it is to make jet source with common centrifugal pump, can continuous and economic work in long-time, discharge the empty G﹠W in the soil, obtain stable high vacuum, make its vacuum prepressing reinforcement soft base achieve success, realized this technology leading position at home and abroad.But its original jet vacuum pump (its structure is seen Fig. 1) also exists some not enough in preceding patent: 1. general structure heaviness, and casing is big, and pipeline adopts 4 " steel pipes; 2. the vacuum connecting pipeline is long, and linkage member is many, and loss of vacuum pressure is big; 3. the liquid jetting device of vacuum jet pump is vertically installed, and makes that the height of mixing chamber interface and film outlet port is bigger, is 1100mm, makes that vacuum preloading efficient is low.
The objective of the invention is in order to overcome three shortcomings that aforementioned jet vacuum pump exists, a kind of rational in infrastructure, more economical and effective novel jet flow vacuum pump is provided, outside its decapacitation is worked under identical condition, can also adapt to the harsh climate condition even still can work as usual under water.
By as above design, the jet vacuum pump of the vacuum prepressing reinforcement soft base special use that this programme is addressed is by the jet case, liquid jetting device, centrifugal pump and motor are formed, the liquid jetting device that it is characterized in that it is that level is installed in the uncovered jet case, one stabilier is arranged in the jet case, be contained in a side of the interior stabilier of water intake UNICOM jet case of the centrifugal pump on the outside higher platform of jet case, the outlet pipe of centrifugal pump connects the jetting orifice of liquid jetting device, the film outlet port of one termination vacuum distributing tube of vacuum connecting tube, the other end is connected to the mixing chamber of liquid jetting device, and the jetburner of liquid jetting device is positioned at the opposite side of jet case stabilier.
The jet vacuum pump under water of another embodiment's vacuum prepressing reinforcement soft base special use of this programme, it is by the jet case, liquid jetting device, centrifugal pump and motor are formed, the liquid jetting device that it is characterized in that it is that level is installed in the uncovered jet case, its motor adopts submersible electric motor, its centrifugal pump is mounted in the inside of jet case, the water intake of centrifugal pump is positioned at the place ahead of water tank stabilier, the water outlet of centrifugal pump directly connects the jetting orifice of liquid jetting device, the film outlet port of one termination vacuum distributing tube of vacuum connecting tube, the other end is connected to the mixing chamber of liquid jetting device, and the liquid jetting device jetburner is positioned at the rear of stabilier.
Adopt this programme can embody following superiority: 1. adopt centrifugal pump to add that liquid jetting device replacement vacuum pump structure is simple, cost is low, expense is low and be convenient to maintain; 2. changing in original jet vacuum pump the liquid jetting device of vertically installing is that level is installed, and has reduced the length of distance between the vacuum connecting tube interface of mixing chamber and the film outlet port, has reduced the loss that vacuumizes, and has improved efficient; 3. use motor instead submersible motor, then centrifugal pump and motor are contained in the jet case and immerse in the water, and the jetting orifice of the water outlet will liquid jetting device of centrifugal pump directly linked to each other, removed the distance of centrifugal pump water outlet and water-blaster jetting orifice, can further reduce the loss and raise the efficiency; 4. adopted submersible motor that this jet vacuum pump is worked under water, stronger to the adaptability of adverse weather condition and job site environment, as on the limit, seabeach, constructing, can both adapt to the morning and evening tides of seawater.
Fig. 1 is the structural representation of jet vacuum pump used in preceding patent 85108820 patents.
Fig. 2, Fig. 3, Fig. 4 are the structural representations of the jet vacuum pump of this programme vacuum method reinforcing flexible foundation special use.Fig. 2 is a plan view, and Fig. 3 is the side view of Fig. 2, and Fig. 4 is a plan view.
Fig. 5, Fig. 6 are the structural representations of the special-purpose jet vacuum pump that can work under water of another embodiment of this programme.Fig. 5 is a plan view, and Fig. 6 is the side view of Fig. 5.
Embodiment below in conjunction with description of drawings this programme.Some construction installation will 85108820 among the figure under the face of land identical.On the soft base piece of desire processing, uniform on request drainage pipe 17, the sand bedding course 16 of processed foundation surface is led in the upper end of drainage pipe, the vacuum distributing tube 15 surperficial with holes that in sand bedding course, is distributing and be interconnected, on sand bedding course, be covered with sealing film 12, press with press mold low bank between fields 13 around the sealing film, vacuum is issued pipe and is linked by film outlet port 14 and vacuum connecting tube 8, and it is air tight that the pipe point of attachment at film outlet port place is handled assurance through certain seal approach.Jet case 1 is placed on the face of land and the sealing film 12, on the platform outside the case coaxial motor 4 and centrifugal pump 3 are housed, the water inlet pipe mouth of centrifugal pump leads to a side of stabilier 10 in the jet case, the outlet pipe of centrifugal pump connects the jetting orifice 9 of liquid jetting device 2, vacuum connecting tube 8 is communicated with the mixing chamber 7 of film outlet port and liquid jetting device, and the jetburner of liquid jetting device is positioned at the opposite side of jet case stabilier 10.
Another embodiment of this programme is the special-purpose jet vacuum pump that can work under water, motor in this scheme adopts submersible electric motor 6, coaxial submersible electric motor and centrifugal pump 3 are installed in the jet case 5 and are dipped in the water, the water intake of centrifugal pump is positioned at the place ahead of jet case stabilier 10, the water outlet of centrifugal pump 3 is directly received the jetting orifice of liquid jetting device, and other parts are identical with preceding embodiment.
Earlier the jet case is installed water during work, starting electrical machinery, centrifugal pump is extracted the interior water of case out again in liquid jetting device sprays into case, there is stabilier just can avoid being entered centrifugal pump and reduces its working efficiency by a large amount of bubbles in the agitate water, water sprays from the liquid jetting device high speed, make the very high degree of vacuum of formation in mixing chamber, import into underground through vacuum connecting tube and vacuum distributing tube, at this moment can be the gentle sucking-off of water in the soil, under the effect of atmospheric pressure, make the particle crypto set more of soil, face of land sedimentation and obtain solid qualified ground gradually.The jet vacuum pump of preceding patent can cause basic native inside to be subjected to the vacuum pressure of 80～85Kpa, reduce and reduced the height and the length of vacuum connecting tube in this programme owing to level installation liquid jetting device, further raise the efficiency, the vacuum pressure that basic native inside is subjected to is brought up to 90～94Kpa from 80～85, more crypto set is solid to make the grogs of ground, the jet vacuum pump that can work under water that this programme provided further reduces internal duct, more can reduce the loss and raise the efficiency, and weather conditions and working environment are had adaptability widely.
Claims (2)
1. the jet vacuum pump of a vacuum prepressing reinforcement soft base special use, it is by jet case (1), liquid jetting device (2), centrifugal pump (3) and motor (4) are formed, the liquid jetting device that it is characterized in that it is that level is installed in the uncovered jet case, one stabilier (10) is arranged in the jet case, be contained in a side of the interior stabilier of water intake UNICOM jet case of the centrifugal pump on the outside higher platform of jet case, the outlet pipe of centrifugal pump connects the jetting orifice (9) of liquid jetting device, the film outlet port (14) of one termination vacuum distributing tube (15) of vacuum connecting tube (8), the other end is connected to the mixing chamber (7) of liquid jetting device, and the jetburner of liquid jetting device is positioned at the opposite side of jet case stabilier.
2. the jet vacuum pump under water of a vacuum prepressing reinforcement soft base special use, it is by jet case (5), liquid jetting device (2), centrifugal pump (3) and motor are formed, the liquid jetting device (2) that it is characterized in that it is that level is installed in the uncovered jet case, its motor (6) adopts submersible electric motor, its centrifugal pump (3) is mounted in the inside of jet case, the water intake of centrifugal pump is positioned at the place ahead of water tank stabilier (10), the water outlet of centrifugal pump directly connects the jetting orifice of liquid jetting device, the film outlet port of one termination vacuum distributing tube of vacuum connecting tube (8), the other end is connected to the mixing chamber (7) of liquid jetting device, and the liquid jetting device jetburner is positioned at the rear of stabilier.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 95104343 CN1063832C (en) | 1995-04-22 | 1995-04-22 | Jet vacuum pump specially for strengthening weak ground by vacuum precompression method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 95104343 CN1063832C (en) | 1995-04-22 | 1995-04-22 | Jet vacuum pump specially for strengthening weak ground by vacuum precompression method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1120130A CN1120130A (en) | 1996-04-10 |
| CN1063832C true CN1063832C (en) | 2001-03-28 |
Family
ID=5075099
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 95104343 Expired - Fee Related CN1063832C (en) | 1995-04-22 | 1995-04-22 | Jet vacuum pump specially for strengthening weak ground by vacuum precompression method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1063832C (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105822607A (en) * | 2014-07-23 | 2016-08-03 | 吴小再 | Jet vacuum pump |
| CN104265695B (en) * | 2014-07-31 | 2016-05-04 | 苏州赛斯德工程设备有限公司 | Discharge pressure is adjustable jet vacuum pump |
| CN104863904B (en) * | 2015-05-30 | 2017-03-08 | 大连理工大学 | One kind dynamically strong vortex lead jetting device |
| CN115262740B (en) * | 2022-08-17 | 2024-04-12 | 中城乡生态环保工程有限公司 | Composite rectifying structure for drainage pump station channel |
-
1995
- 1995-04-22 CN CN 95104343 patent/CN1063832C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN1120130A (en) | 1996-04-10 |
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| C14 | Grant of patent or utility model | ||
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| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |