CN107740403A - A kind of heating consolidation construction method of vertical drainage chimney filter in-built electrical hot pin - Google Patents
A kind of heating consolidation construction method of vertical drainage chimney filter in-built electrical hot pin Download PDFInfo
- Publication number
- CN107740403A CN107740403A CN201711046009.6A CN201711046009A CN107740403A CN 107740403 A CN107740403 A CN 107740403A CN 201711046009 A CN201711046009 A CN 201711046009A CN 107740403 A CN107740403 A CN 107740403A
- Authority
- CN
- China
- Prior art keywords
- chimney filter
- vertical drainage
- drainage chimney
- heating
- electrical bar
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- 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
- E02D3/11—Improving or preserving soil or rock, e.g. preserving permafrost soil by thermal, electrical or electro-chemical means
Landscapes
- 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 kind of heating consolidation construction method of vertical drainage chimney filter in-built electrical hot pin, vertical drainage chimney filter is first connected in sleeve pipe, vertical drainage chimney filter bottom heat sealing machine, which plates, prevents weak soil from entering chimney filter, sleeve pipe by board-plugging device or is manually driven into designated depth, then sleeve pipe is extracted, vertical drainage chimney filter is stayed in the soil body, then cut off vertical drainage chimney filter, make its top leakage sand bedding course；Electrical bar is inserted in vertical drainage chimney filter, electrical bar is connected by the lead of insulative water-proof quick plug, and insulative water-proof quick plug is connected with the snap joint of T-shaped cable, and T-shaped cable is connected with electric power system；Ground is heated using electrical bar, prepressing water discharge consolidation is carried out to ground with reference to the methods of piling prepressing or vacuum preloading or combined vacuum and surcharge preloading.
Description
Technical field
The invention belongs to civil engineering groundwork process field, relates particularly to a kind of vertical drainage chimney filter in-built electrical hot pin
Heating consolidation construction method.
Background technology
Discharging consolidation method has a wide range of applications in Soft Clay Foundation processing.In order to shorten drainage path, reduce solid
The time is tied, it is necessary to squeeze into vertical plastic draining board in ground.Plastic draining board is that banding is composite structured, and centre is to be extruded into
The quilted plastic panel of type, the two sides of core plate is that non-woven geotextile parcel makees filtering layer.Plastic draining board typically first connects sleeve pipe
It is interior, sleeve pipe is driven into by designated depth by plate machinery, then extracts sleeve pipe, plastic draining board is left in the soil body, plane
On generally according to square or equilateral triangle arrange, spacing is 0.7-2.0 rice.Level is to drainage system by horizontal sand bedding course
And the chimney filter composition of embedment sand bedding course.Vertical drainage plate is connected with horizontal drainage system, forms complete drainage system.
Because sleeve pipe causes larger disturbance during the soil body is squeezed into surrounding soil, make under the infiltration coefficient of the soil body
Drop, formed " smear zone (smear zone) ", its diameter is about 2.0-3.0 times of casing diameter.The presence of smear zone is significantly
The rate of discharge of pore water is hindered, causes consolidation time to increase.The scholar's research such as Abuel-Naga find that heating can improve
The infiltration coefficient of smear zone, the inhibition that smear zone is discharged for pore water can be greatly reduced, and be consolidated by indoor large
Consolidation time can be shortened by tying the heating of instrument verification experimental verification, while can increase final settlement.Typically now noted using U-tube
Water heats or drain bar winding electric-heating-wire-heating method, complex operation and observable index is higher, therefore is not suitable for extensive scene
Construction, it is therefore desirable to develop one kind and be suitable for the construction of live plate, and the higher hot type vertical drainage of heating efficiency leads to
Road.
A kind of heating consolidation construction method of vertical drainage chimney filter in-built electrical hot pin is developed, electrical bar is placed on insertion ground
In the vertical drainage chimney filter of base, during consolidation draining, the smear zone soil body around electrical bar heating rise vertical drainage chimney filter
Temperature, increase the infiltration coefficient of the soil body, shorten consolidation time, while the final settlement during basement process can be increased
Amount.
The content of the invention
It is an object of the invention to overcome the deficiencies of the prior art and provide a kind of adding for vertical drainage chimney filter in-built electrical hot pin
Hot consolidation construction method, the temperature of the smear zone soil body around vertical drainage chimney filter is raised, increase the infiltration coefficient of the soil body, shorten admittedly
The time is tied, while the final settlement during basement process can be increased.
The present invention is achieved by the following technical solutions：
A kind of heating consolidation construction method of vertical drainage chimney filter in-built electrical hot pin, including vertical drainage chimney filter and be built in
Electrical bar in vertical drainage chimney filter；The vertical drainage chimney filter is by permeable bellows and wraps up the terylene spun-bonded of permeable bellows
Non-woven fabrics forms,
Vertical drainage chimney filter is first connected in sleeve pipe, vertical drainage chimney filter bottom heat sealing machine, which plates, prevents weak soil from entering
Chimney filter, designated depth is driven into by board-plugging device or manually by sleeve pipe, then extracts sleeve pipe, vertical drainage chimney filter is stayed in soil
In vivo, vertical drainage chimney filter is then cut off, makes its top leakage sand bedding course；
After having set vertical drainage chimney filter, electrical bar is inserted in vertical drainage chimney filter, electrical bar is fast by insulative water-proof
The lead of fast plug is connected, and insulative water-proof quick plug is connected with the snap joint of T-shaped cable, and T-shaped cable is with supplying
Electric system is connected；
After electric rod circuit connection terminates, vertical drainage chimney filter leakage part heap sand is covered, is suitably higher by sand pad around
Layer；
Open electric power system, ground heated using electrical bar, with reference to piling prepressing or vacuum preloading or
The methods of combined vacuum and surcharge preloading, carries out prepressing water discharge consolidation to ground.
In the above-mentioned technical solutions, the permeable bellows is that the external form formed by high density poly propylene (PPR) is in ripple
The new water drainage plastics tubing of shape, uniformly permeable through hole, permeable bellows surrounding outsourcing terylene are spun the groove of permeable bellows
Bonded non-woven fabrics.
In the above-mentioned technical solutions, the electrical bar uses quartz heating rod or ceramic heating bar.
In the above-mentioned technical solutions, electrical bar length should be identical with vertical drainage chimney filter length.
In the above-mentioned technical solutions, temperature sensor, and and temperature controller are buried in the position on the outside of ground inner close fitting chimney filter
It is connected；Temperature controller is also connected with electric power system；In heating process, using temperature controller, when temperature sensor temperature is more than 90
Degree Celsius when, automatically power off；When temperature sensor temperature is less than 80 degrees Celsius, auto-power on heating.
In the above-mentioned technical solutions, in pre-compaction process, monitoring settlement of foundation, pore water pressure dissipation and soil temperature
Change etc., when calculating that the degree of consolidation reaches more than 90%, unloaded, electrical bar is recycled.
A kind of foundation drainage structure that above-mentioned heating consolidation construction method is formed, including vertical drainage chimney filter and electric heating
Rod, the vertical drainage chimney filter are made up of the terylene spun-bonded non-woven fabrics of permeable bellows and the permeable bellows of parcel, vertical drainage
Chimney filter is vertically arranged in ground, and in the electrical bar insertion vertical drainage chimney filter, electrical bar passes through insulative water-proof quick plug
Lead be connected, and insulative water-proof quick plug is connected with the snap joint of T-shaped cable, T-shaped cable and electric power system
It is connected.
The advantages of the present invention are：
The present invention places electrical bar in vertical drainage chimney filter, so as to not influence the basis of chimney filter itself drain function
On, make chimney filter while be provided with electric heating function, its heating arrangement sealing is strong, classification of waterproof is high, and electrical bar construction letter
It is single, it is easy to connect.
Using the temperature of the smear zone soil body around vertical drainage chimney filter in-built electrical hot pin rise chimney filter, consolidation draining is accelerated
Speed, shorten consolidation time.
Vertical drainage chimney filter uses tubular structure, convenient to be squeezed into ground using plate machinery, itself can compress suitable
Answer the sedimentation during basement process.And vertical drainage chimney filter and electrical bar are split-type structural, vertical drainage chimney filter inserts ground
Vertical inner space is formd after base, then facilitates and electrical bar is placed in vertical drainage chimney filter, avoid plate process pair
In the destruction of electrical bar.Compared with heating wire winding formula heats drain bar, its is simple in construction, is easy to site operation and protection.
Brief description of the drawings
Fig. 1 is the structural representation of vertical drainage chimney filter of the present invention.
Fig. 2 is that electrical bar is connected detail drawing with electric power system.
Fig. 3 is vertical drainage chimney filter in-built electrical hot pin heating consolidation construction sectional drawing.
Embodiment
Technical scheme is further illustrated with reference to specific embodiment.
A kind of heating consolidation construction method of vertical drainage chimney filter in-built electrical hot pin, including vertical drainage chimney filter 1 and be used for
The electrical bar 2 being built in vertical drainage chimney filter；
The vertical drainage chimney filter is by permeable bellows 1-1 and the terylene spun-bonded non-woven fabrics 1-2 groups for wrapping up permeable bellows
Into the permeable bellows is the corrugated new water drainage plastics tubing of the external form formed by high density poly propylene (PPR), thoroughly
The uniform permeable through hole 1-3 of the groove of water ripples pipe, the permeable terylene spun-bonded non-woven fabrics of bellows surrounding outsourcing；Vertical drainage chimney filter
Diameter be preferably 30mm, other technologies index is as follows：
To the 50% of external diameter, 1. off-load immediately, sample does not rupture press perpendicular, not stratified；
2. the weight that temperature is 1Kg with weight under conditions of 0 DEG C, height 1M, impacting 10 times, more than Ying Jiuci nothings are opened
Split；
3. inwall is uniform and smooth, permeable hole is equably beaten less than the 1/2 of trough height, is beaten in trough height more than 1/2
Hole count no more than sum 10%；
4. water permeable area >=2500mm2/m；
5. longitudinal welds≤3.0%；
6. flexibility %≤2；
7. ring stiffness >=13kN/m2；
8th, a diameter of 1mm-3mm of permeable through hole, spacing 10mm, and 360 degree of scopes on the groove of permeable bellows
Inside it is uniformly distributed.
The electrical bar 2 can use quartz heating rod or ceramic heating bar, classification of waterproof IPX7, and electrical bar length should be with
Chimney filter length is identical.
Using vertical drainage chimney filter and electrical bar carry out heat consolidation construction procedure be：
Referring to accompanying drawing 2 and 3, place first flattens, and lays medium coarse sand bed course, it is desirable to which its infiltration coefficient is more than 10-3M/s, will
Vertical drainage chimney filter is first connected in sleeve pipe, and vertical drainage chimney filter bottom heat sealing machine, which plates, prevents weak soil from entering chimney filter, passes through
Sleeve pipe is manually driven into designated depth by board-plugging device, then extracts sleeve pipe, vertical drainage chimney filter is stayed in the soil body, then
Vertical drainage chimney filter is cut off, it is about 0.1 meter to make its top leakage sand bedding course length, and vertical drainage chimney filter is according to square or waits
Side triangular arrangement, spacing are 0.7-2.0 rice；
After having set vertical drainage chimney filter, electrical bar 2 is placed in vertical drainage chimney filter 1, electrical bar is anti-by insulating
The lead of water quick plug 3 is connected, and insulative water-proof quick plug 3 is connected with the snap joint of T-shaped cable 4, T-shaped electricity
Cable is connected with electric power system；
Temperature sensor 5 is buried in position on the outside of ground inner close fitting chimney filter, and is connected with temperature controller；Temperature controller also with
Electric power system is connected, and controls the power supply to electrical bar；
After electric rod circuit connection terminates, vertical drainage chimney filter leakage part heap sand is covered, is suitably higher by sand pad around
Layer；
Open electric power system, ground heated using electrical bar, can combine piling prepressing or vacuum preloading,
Or the methods of combined vacuum and surcharge preloading, carries out prepressing water discharge consolidation to ground.
By in thermal process, when temperature sensor temperature is more than 90 degrees Celsius, automatically power off；When temperature sensor temperature is low
When 80 degrees Celsius, auto-power on heating；
In pre-compaction process, monitoring settlement of foundation, pore water pressure dissipation and soil temperature change etc., the degree of consolidation is calculated
When reaching more than 90%, unloaded, electrical bar is recycled.
Exemplary description has been done to the present invention above, it should explanation, in the situation for the core for not departing from the present invention
Under, any simple deformation, modification or other skilled in the art can not spend the equivalent substitution of creative work equal
Fall into protection scope of the present invention.
Claims (7)
- A kind of 1. heating consolidation construction method of vertical drainage chimney filter in-built electrical hot pin, it is characterised in that：Filtered including vertical drainage Pipe and electrical bar；The vertical drainage chimney filter is made up of the terylene spun-bonded non-woven fabrics of permeable bellows and the permeable bellows of parcel,Vertical drainage chimney filter is first connected in sleeve pipe, vertical drainage chimney filter bottom heat sealing machine, which plates, prevents weak soil from entering filter Pipe, is driven into designated depth by board-plugging device or manually by sleeve pipe, then extracts sleeve pipe, vertical drainage chimney filter is stayed in the soil body It is interior, vertical drainage chimney filter is then cut off, makes its top leakage sand bedding course；After having set vertical drainage chimney filter, electrical bar is inserted in vertical drainage chimney filter, electrical bar is quickly inserted by insulative water-proof The lead of head is connected, and insulative water-proof quick plug is connected with the snap joint of T-shaped cable, and T-shaped cable is with power supply System is connected；After electric rod circuit connection terminates, vertical drainage chimney filter leakage part heap sand is covered, is suitably higher by sand bedding course around；Electric power system is opened, ground is heated using electrical bar, with reference to piling prepressing or vacuum preloading or vacuum The methods of combined heap load precompacting, carries out prepressing water discharge consolidation to ground.
- 2. a kind of heating consolidation construction method of vertical drainage chimney filter in-built electrical hot pin according to claim 1, its feature It is：The permeable bellows is the corrugated plastic pipe of external form, the uniform permeable through hole of the groove of permeable bellows, thoroughly The terylene spun-bonded non-woven fabrics of water ripples pipe surrounding outsourcing.
- 3. a kind of heating consolidation construction method of vertical drainage chimney filter in-built electrical hot pin according to claim 1, its feature It is：The electrical bar uses quartz heating rod or ceramic heating bar.
- 4. a kind of heating consolidation construction method of vertical drainage chimney filter in-built electrical hot pin according to claim 1, its feature It is：Electrical bar length should be identical with vertical drainage chimney filter length.
- 5. a kind of heating consolidation construction method of vertical drainage chimney filter in-built electrical hot pin according to claim 1, its feature It is：Temperature sensor is buried in position on the outside of ground inner close fitting chimney filter, and is connected with temperature controller；Temperature controller also with power supply System is connected；In heating process, using temperature controller, when temperature sensor temperature is more than 90 degrees Celsius, automatically power off；Work as temperature When spending sensor temperature less than 80 degrees Celsius, auto-power on heating.
- 6. a kind of heating consolidation construction method of vertical drainage chimney filter in-built electrical hot pin according to claim 1, its feature It is：In pre-compaction process, monitoring settlement of foundation, pore water pressure dissipation and soil temperature change etc., calculate that the degree of consolidation reaches When more than 90%, unloaded, electrical bar is recycled.
- What 7. a kind of heating consolidation construction method of vertical drainage chimney filter in-built electrical hot pin according to claim 1 was formed A kind of foundation drainage structure, it is characterised in that：Including vertical drainage chimney filter and electrical bar, the vertical drainage chimney filter is by permeable ripple Line pipe and the terylene spun-bonded non-woven fabrics composition for wrapping up permeable bellows, vertical drainage chimney filter are vertically arranged in ground, the electricity In hot pin insertion vertical drainage chimney filter, electrical bar is connected by the lead of insulative water-proof quick plug, and insulative water-proof is fast Fast plug is connected with the snap joint of T-shaped cable, and T-shaped cable is connected with electric power system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711046009.6A CN107740403A (en) | 2017-10-31 | 2017-10-31 | A kind of heating consolidation construction method of vertical drainage chimney filter in-built electrical hot pin |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711046009.6A CN107740403A (en) | 2017-10-31 | 2017-10-31 | A kind of heating consolidation construction method of vertical drainage chimney filter in-built electrical hot pin |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107740403A true CN107740403A (en) | 2018-02-27 |
Family
ID=61233726
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711046009.6A Pending CN107740403A (en) | 2017-10-31 | 2017-10-31 | A kind of heating consolidation construction method of vertical drainage chimney filter in-built electrical hot pin |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107740403A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109853517A (en) * | 2019-02-18 | 2019-06-07 | 中交天津港湾工程研究院有限公司 | A kind of U-shaped circulating hot water consolidation draining system and its construction method |
| CN110004912A (en) * | 2019-03-29 | 2019-07-12 | 中交天津港湾工程研究院有限公司 | A kind of outer plastic draining board and its consolidation draining construction method around heater wire |
| CN112176983A (en) * | 2020-08-28 | 2021-01-05 | 温州大学 | Combined type heating, electroosmosis and drainage pumping frame system |
| WO2021164426A1 (en) * | 2020-09-27 | 2021-08-26 | 江苏鑫泰岩土科技有限公司 | Pressurized thermosensitive vaporization phase change consolidation method and thermal desensitization intermittent-type evaporator therefor |
| CN113389214A (en) * | 2021-04-13 | 2021-09-14 | 海南大学 | South sea island reef composite foundation construction device |
| CN113865988A (en) * | 2021-09-26 | 2021-12-31 | 浙江大学 | Soft soil thermal consolidation model test device and method |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101831903A (en) * | 2010-05-18 | 2010-09-15 | 上海港湾软地基处理工程(集团)有限公司 | Method for treating soft foundation |
| CN103255761A (en) * | 2012-02-16 | 2013-08-21 | 同济大学 | Method for reinforcing soft soil foundation by using calescence type vacuum preloading way |
| CN203530996U (en) * | 2013-09-25 | 2014-04-09 | 杭州萧山路桥工程处 | Multi-well-point combined type precipitation facility |
| CN104727296A (en) * | 2013-12-20 | 2015-06-24 | 邓立新 | Self-suction drain pipe |
| CN107190729A (en) * | 2017-06-20 | 2017-09-22 | 天津大学 | A kind of ground heater and application device progress ground heat the construction method of combined vacuum precompressed soft soil foundation |
-
2017
- 2017-10-31 CN CN201711046009.6A patent/CN107740403A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101831903A (en) * | 2010-05-18 | 2010-09-15 | 上海港湾软地基处理工程(集团)有限公司 | Method for treating soft foundation |
| CN103255761A (en) * | 2012-02-16 | 2013-08-21 | 同济大学 | Method for reinforcing soft soil foundation by using calescence type vacuum preloading way |
| CN203530996U (en) * | 2013-09-25 | 2014-04-09 | 杭州萧山路桥工程处 | Multi-well-point combined type precipitation facility |
| CN104727296A (en) * | 2013-12-20 | 2015-06-24 | 邓立新 | Self-suction drain pipe |
| CN107190729A (en) * | 2017-06-20 | 2017-09-22 | 天津大学 | A kind of ground heater and application device progress ground heat the construction method of combined vacuum precompressed soft soil foundation |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109853517A (en) * | 2019-02-18 | 2019-06-07 | 中交天津港湾工程研究院有限公司 | A kind of U-shaped circulating hot water consolidation draining system and its construction method |
| CN109853517B (en) * | 2019-02-18 | 2024-02-09 | 中交天津港湾工程研究院有限公司 | U-shaped circulating hot water consolidation drainage system and construction method thereof |
| CN110004912A (en) * | 2019-03-29 | 2019-07-12 | 中交天津港湾工程研究院有限公司 | A kind of outer plastic draining board and its consolidation draining construction method around heater wire |
| CN112176983A (en) * | 2020-08-28 | 2021-01-05 | 温州大学 | Combined type heating, electroosmosis and drainage pumping frame system |
| WO2021164426A1 (en) * | 2020-09-27 | 2021-08-26 | 江苏鑫泰岩土科技有限公司 | Pressurized thermosensitive vaporization phase change consolidation method and thermal desensitization intermittent-type evaporator therefor |
| CN113389214A (en) * | 2021-04-13 | 2021-09-14 | 海南大学 | South sea island reef composite foundation construction device |
| CN113389214B (en) * | 2021-04-13 | 2022-05-03 | 海南大学 | South sea island reef composite foundation construction device |
| CN113865988A (en) * | 2021-09-26 | 2021-12-31 | 浙江大学 | Soft soil thermal consolidation model test device and method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107740403A (en) | A kind of heating consolidation construction method of vertical drainage chimney filter in-built electrical hot pin | |
| CN103255761B (en) | A kind of temperature-increasing type Vacuum Preloading Method for Consolidation of Soft Soil Foundation method | |
| CN105887604B (en) | A kind of operation roadbed disease disposal plant and processing method | |
| CN107794909A (en) | A kind of hot laid plastic drain bar and its construction method | |
| CN102926378A (en) | Conductive composite vacuum soft soil reinforcing prepressing method | |
| CN109914385A (en) | A kind of method of hydraulic structure treatment of soft foundation | |
| CN205475195U (en) | Bloated joint vacuum preloading ground processing apparatus of bandlet side | |
| CN107190729A (en) | A kind of ground heater and application device progress ground heat the construction method of combined vacuum precompressed soft soil foundation | |
| CN207891864U (en) | A kind of ground heating discharge structure of vertical drainage chimney filter in-built electrical hot pin | |
| CN107476285A (en) | The apparatus and method of vacuum electroosmosis joint reinforcement Soft Clay Foundation | |
| CN109853517B (en) | U-shaped circulating hot water consolidation drainage system and construction method thereof | |
| CN110004912A (en) | A kind of outer plastic draining board and its consolidation draining construction method around heater wire | |
| CN208668397U (en) | A kind of vertical drainage consolidation pile and system accelerating bury consolidation using hot water | |
| CN207672556U (en) | A kind of hot laid plastic drain bar | |
| CN206685168U (en) | The photovoltaic cable of protection against rodents sting | |
| CN110939121A (en) | Drainage consolidation construction method combining hot water pipe and plastic drainage plate | |
| CN102828499A (en) | Improved quick high vacuum densification soft foundation treatment method | |
| CN205777284U (en) | A kind of floor heating structure | |
| CN205917685U (en) | Integral type well dotted arranges vacuum system | |
| CN101349056A (en) | Composite electroosmosis and AC electric shock water drain method and uses thereof | |
| CN210086226U (en) | Plastic drainage plate externally wound with heating wire | |
| CN105926577B (en) | Vacuum preloading seepage consolidation method | |
| CN101338558A (en) | Composite AC electric shock discharging method, device thereof and uses | |
| CN108086636A (en) | It is a kind of to be integrally formed fever ceramic tile and its production installation method | |
| CN110195429B (en) | Heating and solidifying system of vacuum pre-pressing combined closed-sun type solar water heater and construction method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |