CN1078759A - Caulking technology with tarring - Google Patents

Caulking technology with tarring Download PDF

Info

Publication number
CN1078759A
CN1078759A CN 92103293 CN92103293A CN1078759A CN 1078759 A CN1078759 A CN 1078759A CN 92103293 CN92103293 CN 92103293 CN 92103293 A CN92103293 A CN 92103293A CN 1078759 A CN1078759 A CN 1078759A
Authority
CN
China
Prior art keywords
heat
pitch
pump
insulation
preservation
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.)
Granted
Application number
CN 92103293
Other languages
Chinese (zh)
Other versions
CN1035783C (en
Inventor
叶铭勋
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
NANJING HYDROLOGIC SCIENTIFIC RESEARCH INST MINISTRY OF WATER RESOURCES
Original Assignee
NANJING HYDROLOGIC SCIENTIFIC RESEARCH INST MINISTRY OF WATER RESOURCES
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by NANJING HYDROLOGIC SCIENTIFIC RESEARCH INST MINISTRY OF WATER RESOURCES filed Critical NANJING HYDROLOGIC SCIENTIFIC RESEARCH INST MINISTRY OF WATER RESOURCES
Priority to CN92103293A priority Critical patent/CN1035783C/en
Publication of CN1078759A publication Critical patent/CN1078759A/en
Application granted granted Critical
Publication of CN1035783C publication Critical patent/CN1035783C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Images

Landscapes

  • Bridges Or Land Bridges (AREA)
  • Road Paving Structures (AREA)

Abstract

The present invention a kind ofly is used under water various or underground structure or at the anti-seep plugging technology of the work plane of seepage condition operation, is widely used in anti-seep plugging technology fields such as various submerged structures and basis, tunnel, bridge pier, cofferdam.Characteristics of the present invention are with pitch heating, with resistant to elevated temperatures heat-resisting pump heated bitumen are pumped into the grouting pipeline of energy heat-insulation and heat-preservation then, make it successfully to send into the rises, reach the purpose of leak stopping.Use the present invention, cost is low, technology is simple, can improve the execution conditions of underground or submerged structure such as power station, bridge pier, tunnel, improves engineering construction quality, shortens the construction period.

Description

Caulking technology with tarring
The invention belongs under water various or underground structure or, specially refer to the anti-seep plugging technology field in various submerged structures and basis, tunnel, bridge pier, cofferdam at the anti-seep plugging technology of the work plane of seepage condition operation.
At the work progress in various hydraulic architectures, tunnel, bridge pier, cofferdam or after building up, normal because percolating water influences the normal construction of engineering or influences the safe handling of building.Watertight grouting leakage stopping technology commonly used is cementation and chemical grouting, and they all are based on the chemical reaction of grouting agent and produce a kind of novel substance, reach the purpose of the impervious leakage-stopping of building.U.S. Pat-3252290 adopts the mulseal greater than water proportion, and the segregation precipitation by pitch particle enters the slit and stops up penetrating passage.Above-mentioned watertight grouting leakage stopping technology, little processing is effective for leakage.Yet dilute the shortcoming that runs off owing to all having by current behind the above-mentioned grouting agent chance water, so the seepage treatment that they are big to flow, flow velocity is high is difficult to prove effective.
Purpose of the present invention just is to provide a kind of being applicable to handle various hydraulic architectures, tunnel, bridge pier, cofferdam in work progress or build up big seepage and the asphalt grouting anti-seep plugging technology simple, small investment of flow velocity high flow capacity that the back is run into.
Design of the present invention is based on the asphalt grouting physical action, and it is not afraid of flow, flow velocity is big, has the advantages that do not diluted by current and run off.Utilize the physical property of pitch, become after the heating and be easy to flowing liquid, become solid after the cooling again, thereby reach the impervious leakage-stopping purpose.Earlier pitch is heated to proper temperature for this reason, makes it to have certain degree of mobilization, be transported to seepage place again.Because pitch and water do not dissolve each other, heated bitumen promptly is dispersed into some particles after meeting water, and along with constantly pouring into of pitch, the pitch of dispersion constantly condenses and sprawls and come, and sticks on the slotted wall gradually.Along with the continuous thickening of bitumen layer, constantly being contracted to fully of penetrating passage stopped up, thereby reaches plugging function.Because pitch when contacting with water, has formed the bad film of one deck thermal conductivity on its surface, the pitch that pours into cools off slower in crack and hole, the diffusion of the pitch slurries that are highly advantageous to, so it be particularly useful for the slit aperture greatly, flow and the big seepage of flow velocity.
The slit aperture is big in order to handle effectively, flow and the big seepage of flow velocity, and the technology of the present invention key is: the heating-up temperature of first pitch should easily be carried to be as the criterion easily to flow, and heating-up temperature is 120 ℃~200 ℃; Second pump that uses should be resistant to elevated temperatures heat-resisting pump; The 3rd in order to keep asphalt temperature, makes it successfully to send into the rises, and conveyance conduit should be the grouting pipeline of heat-insulation and heat-preservation.
Detailed technology of the present invention is described below:
Earlier pitch is heated to be and is easy to flowing liquid, with pump the heated bitumen pumping is poured into the grout pipe of heat-insulation and heat-preservation again, heated bitumen enters seepage part by the grout pipe of heat-insulation and heat-preservation, after heated bitumen is met water, be dispersed into some particles, the continuous Ning Ju of the pitch And drawout that disperses sticks on the slotted wall, gradually along with the continuous thickening of pitch adsorption layer, penetrating passage constantly dwindles until stopping up fully, after impervious leakage-stopping finishes,, use the cleaning agent scavenging pump by pump housing circulation.
According to the requirement of asphalt grouting, described pitch is the pitch of the various trades mark, the various modified bitumens based on petroleum bitumen that comprise bi tumenf orr oad, building petroleum asphalt and common petroleum pitch and add various additives.When specifically selecting the pitch trade mark, should decide according to concrete engine request and used construction machinery.
The firing equipment of pitch is made up of one or more heating tank, and the volume and the quantity of heating tank are decided according to requirement of engineering, and once Jia Re pitch amount will satisfy the grouting consumption of a hole or a hole section.The pitch mode of heating is coal fire heating or firewood heating, is equipped with the air blast facility simultaneously.The heating-up temperature of pitch is decided on the kind of pitch, and mainly easily flowing in course of conveying with pitch is as the criterion, but the maximum heating temperature of pitch must not surpass the maximum heating temperature that this pitch allowed, so the heating-up temperature of pitch is 120 ℃~200 ℃.
Being used to carry the pump of pitch must be resistant to elevated temperatures heat-resisting pump, comprises the motor machine pump of the various suitable asphalt delivery of gear pump, centrifugal pump and reciprocating pump.The discharge pressure of heated bitumen must guarantee heated bitumen is pressed in the penetrating passage and be advisable, and therefore heat-resisting pump discharge pressure is greater than 0.03MPa.After reaching the design discharge pressure, significantly do not inhale slurry and can end grouting.
In addition, if the reduction of the viscosity with temperature of heated bitumen and increasing is the conveyance conduit insulation improper measures of grout pipe (especially imbedding part in the water) particularly.The detemperature rate of heated bitumen is too fast will to be caused heated bitumen to stop up in pipeline and forces grouting to be interrupted.Consider job site service condition, factor such as economical and practical, heat-insulation and heat-preservation grout pipe of the present invention adopts following insulation measure:
(1) less to ponding in hole more shallow grout hole and the hole, the big again and bigger grout hole of grout absorption of hole adopts heat-preserving hose, comprises rubber tube, plastic pipe or adopts steel pipe;
(2) darker to boring, the more grout hole of ponding adopts in the hole: a. steel pipe puts heat-preserving hose outward, comprises that steel pipe puts rubber tube or plastic pipe outward; B. double-layer pipe, filling heat-insulation and heat-preservation material between the steel pipe, the heat-insulation and heat-preservation material is expanded perlite, float stone, glass fiber, asbestos and rock wool etc.
After grouting stops, should be immediately with heating or the cleaning agent through heating do not clean, cleaning agent is the hot water cleaning agent of diesel oil or kerosene or other organic solvent or admixture emulsifier, and emulsifier is various emulsifier and the auxiliary additive thereof that peregal series, OP series etc. can be emulsified into petroleum bitumen the aqueous solution.
Description of drawings:
Fig. 1: construction technology schematic diagram of the present invention
Fig. 2: the present invention is the heat-insulation and heat-preservation grout pipe structural representation of double-layer pipe
Fig. 3: the present invention is heat-insulation and heat-preservation grout pipe (band Grout-jetting pipe) the structural profile schematic diagram of double-layer pipe
Fig. 4: the present invention connects generalized section for the pipe of the heat-insulation and heat-preservation grout pipe of double-layer pipe
Fig. 5: the present invention is the heat-insulation and heat-preservation grout pipe structural representation of steel pipe overcoat heat-preserving hose
Be described further below in conjunction with drawings and Examples.
Embodiment 1: earlier No. 100 road asphalts being heated to 120 ℃~150 ℃ becomes and is easy to flowing liquid, with resistant to elevated temperatures gear pump the heated bitumen pumping is poured into the grout pipe that steel pipe puts the heat-insulation and heat-preservation of rubber tube outward again, it is to be assembled by a joint or the above such pipe of a joint as shown in Figure 5, rubber tube 25 is enclosed within the outside of steel pipe 24, rubber tube terminal is tightened with galvanized wire or other method, anti-sealing enters the interlayer between rubber tube and the steel pipe, bottom one the joint for penetrate the slurry floral tube 27, between each pipe joint with in connect 26 connections.Pump discharge pressure is greater than 0.03MPa; Heated bitumen enters seepage part by the grout pipe of heat-insulation and heat-preservation, after heated bitumen is met water, be dispersed into some particles, the continuous Ning Ju of the pitch And drawout that disperses adheres on the slotted wall, gradually along with the continuous thickening of pitch adsorption layer, penetrating passage constantly dwindles until stopping up fully, after impervious leakage-stopping finishes,, use kerosene or diesel oil scavenging pump without heating or the suitable heating of warp by pump housing circulation.
Embodiment 2: earlier No. 30 building petroleum asphalts being heated to 180 ℃~190 ℃ becomes and is easy to flowing liquid, with resistant to elevated temperatures centrifugal pump the heated bitumen pumping is poured into the grout pipe of the heat-insulation and heat-preservation of bimetallic tube again, it is to be formed by three different component-assembled as shown in Figure 2, it is double-layer pipe 20, pipe connect 21 and band penetrate the double-layer pipe 22 of stock pump, filling expansion perlite bulk cargo 23 between the bimetallic tube, bottom one section is floral tube (as shown in Figure 3) for penetrating slurry, connects 21 with pipe between each pipe joint and connects (see figure 4)s.Pump discharge pressure is greater than 0.03MPa; Heated bitumen enters seepage part by the grout pipe of heat-insulation and heat-preservation, after heated bitumen is met water, be dispersed into some particles, the continuous Ning Ju of the pitch And drawout that disperses adheres on the slotted wall, gradually along with the continuous thickening of pitch adsorption layer, penetrating passage constantly dwindles until stopping up fully, after impervious leakage-stopping finishes, by pump housing circulation, with the colas scavenging pump of heating.
The foregoing description activities is as shown in Figure 1: use auger pore-creating; drilling depth requires to reach the position that needs water reinforcement; grout pipe 17 inserts in the sleeve pipe 16; sleeve pipe 16 passes overburden 18 and gos deep into permeable layer 19; sleeve pipe 16 shields; prevent the hole of collapsing, the cover tube wall bores some apertures, passes through in order to slurries.
Asphalt stock smashed or preheating after pour Asphaltum heating pot 1 and 2 into, start blast fan 3 and 4 and regulate flame size, treat that pitch is heated to set point of temperature and has (deciding on asphalt variety) after certain mobile performance, open ball valve 5 or 6, heated bitumen is put into aggregate tank 7, open valve 8 and 14 And valve-offs 9,13 and 12, can start asphalt delivery pump 11, heated bitumen is entered seepage part by heat-insulation and heat-preservation grout pipe 17, the amount of sending into that heated bitumens are regulated by control valve 12 in start back is no more than design load with the reading of controlled pressure table 15.After pressure meter 15 arrives design pressure, and do not have obviously to advance to starch and to end grouting.
After grouting finishes, rapidly valve-off 8,14 and and 12, and open valve 9 and 13, with the cleaning fluid in the material storage barrel 10 by pump housing wash cycles repeatedly.
Use the foregoing description, pour into 1m 3Pitch, porosity are in 40%, and then volume that can be fixed is 2.5m 3, as porosity 30%, then volume that can be fixed is 3.3m 3, because slurries are difficult to hole is full of fully, therefore in fact the slurry consolidation body will be higher than this value.
Do not see in filling process and after the grouting that slurries run off, and illustrate that the bituminous grout that pours into has played the effect of filling hole effectively.Compare with other rapid hardening grouting agent (as cement-sodium silicate etc.) that cost is low, technology is simple, can improve the execution conditions of underground or submerged structure such as power station, bridge pier, tunnel, improve engineering construction quality, shorten the construction period, thereby the reduction construction costs has great economic benefit and social benefit.

Claims (10)

1, a kind ofly be used to handle under water or the asphalt grouting anti-seep plugging technology of various infiltrations such as the following various buildings in the face of land, basis, cofferdam, rock fracture, tunnel, bridge pier, it is characterized in that:
(1) elder generation is heated to be pitch and is easy to flowing liquid,
(2) with pump the heated bitumen pumping is poured into the grout pipe of heat-insulation and heat-preservation again,
(3) heated bitumen enters seepage part by the grout pipe of heat-insulation and heat-preservation,
(4) after heated bitumen is met water, be dispersed into some particles, the continuous Ning Ju of the pitch of dispersion And drawout sticks on the slotted wall gradually, and along with the continuous thickening of pitch adsorption layer, penetrating passage constantly dwindles until obstruction fully,
(5) after impervious leakage-stopping finishes,, use the cleaning agent scavenging pump by pump housing circulation.
2, asphalt grouting anti-seep plugging technology according to claim 1, it is characterized in that described pitch is the pitch of the various trades mark, the various modified bitumens that comprise bi tumenf orr oad, building petroleum asphalt and common petroleum pitch and add various additives based on petroleum bitumen.
3, asphalt grouting anti-seep plugging technology according to claim 1 and 2 is characterized in that its heating-up temperature of described pitch is 120 ℃~200 ℃.
4,, it is characterized in that described pitch mode of heating is coal fire heating or firewood heating, is equipped with the air blast facility simultaneously according to claim 1 or 3 described asphalt grouting anti-seep plugging technologies.
5,, it is characterized in that described pump is resistant to elevated temperatures heat-resisting pump, comprises the motor machine pump of the various suitable asphalt delivery of gear pump, centrifugal pump and reciprocating pump and underflow pump according to claim 1 or 4 described asphalt grouting anti-seep plugging technologies.
6, asphalt grouting anti-seep plugging technology according to claim 1 or 5 is characterized in that described heat-resisting pump discharge pressure is greater than 0.03MPa.
7, according to claim 1 or 6 described asphalt grouting anti-seep plugging technologies, it is characterized in that described heat-insulation and heat-preservation grout pipe is a heat-preserving hose, comprise rubber tube, plastic pipe.
8,, it is characterized in that described heat-insulation and heat-preservation grout pipe is that steel pipe puts heat-preserving hose outward, comprises that steel pipe puts rubber tube or plastic pipe outward according to claim 1 or 6 described asphalt grouting anti-seep plugging technologies.
9, according to claim 1 or 6 described asphalt grouting anti-seep plugging technologies, it is characterized in that described heat-insulation and heat-preservation grout pipe is a double-layer pipe, filling heat-insulation and heat-preservation material between the steel pipe, the heat-insulation and heat-preservation material is expanded perlite, float stone, glass fiber, asbestos and rock wool.
10, according to claim 1 or 9 described asphalt grouting anti-seep plugging technologies, it is characterized in that described cleaning agent is the hot water cleaning agent of diesel oil or kerosene or other organic solvent or admixture emulsifier, emulsifier is various emulsifier and the auxiliary additive thereof that peregal series, OP series etc. can be emulsified into petroleum bitumen the aqueous solution.
CN92103293A 1992-05-11 1992-05-11 Caulking technology with tarring Expired - Fee Related CN1035783C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN92103293A CN1035783C (en) 1992-05-11 1992-05-11 Caulking technology with tarring

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN92103293A CN1035783C (en) 1992-05-11 1992-05-11 Caulking technology with tarring

Publications (2)

Publication Number Publication Date
CN1078759A true CN1078759A (en) 1993-11-24
CN1035783C CN1035783C (en) 1997-09-03

Family

ID=4940129

Family Applications (1)

Application Number Title Priority Date Filing Date
CN92103293A Expired - Fee Related CN1035783C (en) 1992-05-11 1992-05-11 Caulking technology with tarring

Country Status (1)

Country Link
CN (1) CN1035783C (en)

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101131043B (en) * 2007-09-29 2010-08-11 北京交通大学 Application method of bitumen based grouting materials in pre-stress construction
CN102061711A (en) * 2010-12-10 2011-05-18 湖北白莲河抽水蓄能有限公司 Method for preventing rock seepage of underground cavern
CN102912795A (en) * 2012-11-06 2013-02-06 中国水利水电科学研究院 Device and method for stopping leakage by grouting low-heat asphalt
CN102927446A (en) * 2012-11-13 2013-02-13 济钢集团有限公司 Condensed water discharging device for coal gas pressure pipeline and using method thereof
CN103643680A (en) * 2013-12-10 2014-03-19 浙江工业大学 Emulsified asphalt grouting process
CN104177846A (en) * 2014-07-31 2014-12-03 上海城建新路桥建设工程有限公司 Grouting material, grouting method and road maintenance method
CN105065039A (en) * 2015-09-14 2015-11-18 成都理工大学 Thermal insulation method for high-ground-temperature tunnel surrounding rocks through grouting
CN105349117A (en) * 2015-09-29 2016-02-24 新疆贝肯能源工程股份有限公司 Plugging agent for drilling fluid and preparation method for plugging agent
CN107190760A (en) * 2017-06-12 2017-09-22 江苏旭辰交通科技发展有限公司 A kind of substrate decompression draining and Z-type backing supporting steel sheet-pile cofferdam construction method
CN109538295A (en) * 2018-11-27 2019-03-29 中国神华能源股份有限公司 Seal groundwater in mining area library system
WO2021073208A1 (en) * 2019-10-16 2021-04-22 上海建工二建集团有限公司 Foundation pit rescue grouting temperature control device and application method thereof
CN113777028A (en) * 2021-11-11 2021-12-10 成都理工大学 Device and method for measuring adhesive strength between gel plugging material and rock wall surface
CN114874749A (en) * 2022-05-05 2022-08-09 水利部交通运输部国家能源局南京水利科学研究院 Underwater plugging material and preparation method thereof

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2837109A (en) * 1956-06-12 1958-06-03 Eisner Martin Waterproofing material pumping apparatus
US3252290A (en) * 1961-10-27 1966-05-24 Phillips Petroleum Co Grouting of underwater formations
US3407605A (en) * 1963-12-23 1968-10-29 Continental Oil Co Method for isolating a cavity

Cited By (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101131043B (en) * 2007-09-29 2010-08-11 北京交通大学 Application method of bitumen based grouting materials in pre-stress construction
CN102061711A (en) * 2010-12-10 2011-05-18 湖北白莲河抽水蓄能有限公司 Method for preventing rock seepage of underground cavern
CN102061711B (en) * 2010-12-10 2012-10-17 湖北白莲河抽水蓄能有限公司 Method for preventing rock seepage of underground cavern
CN102912795A (en) * 2012-11-06 2013-02-06 中国水利水电科学研究院 Device and method for stopping leakage by grouting low-heat asphalt
CN102912795B (en) * 2012-11-06 2014-07-23 中国水利水电科学研究院 Device and method for stopping leakage by grouting low-heat asphalt
CN102927446A (en) * 2012-11-13 2013-02-13 济钢集团有限公司 Condensed water discharging device for coal gas pressure pipeline and using method thereof
CN102927446B (en) * 2012-11-13 2014-03-05 济钢集团有限公司 Condensed water discharging device for coal gas pressure pipeline and using method thereof
CN103643680A (en) * 2013-12-10 2014-03-19 浙江工业大学 Emulsified asphalt grouting process
CN104177846A (en) * 2014-07-31 2014-12-03 上海城建新路桥建设工程有限公司 Grouting material, grouting method and road maintenance method
CN104177846B (en) * 2014-07-31 2016-07-06 上海城建新路桥建设工程有限公司 Injecting paste material, grouting method and road maintenance method for maintaining
CN105065039A (en) * 2015-09-14 2015-11-18 成都理工大学 Thermal insulation method for high-ground-temperature tunnel surrounding rocks through grouting
CN105065039B (en) * 2015-09-14 2018-02-13 成都理工大学 A kind of High-geotemperature tunnel surrounding grouting heat-insulating method
CN105349117A (en) * 2015-09-29 2016-02-24 新疆贝肯能源工程股份有限公司 Plugging agent for drilling fluid and preparation method for plugging agent
CN107190760A (en) * 2017-06-12 2017-09-22 江苏旭辰交通科技发展有限公司 A kind of substrate decompression draining and Z-type backing supporting steel sheet-pile cofferdam construction method
CN109538295A (en) * 2018-11-27 2019-03-29 中国神华能源股份有限公司 Seal groundwater in mining area library system
WO2021073208A1 (en) * 2019-10-16 2021-04-22 上海建工二建集团有限公司 Foundation pit rescue grouting temperature control device and application method thereof
CN113777028A (en) * 2021-11-11 2021-12-10 成都理工大学 Device and method for measuring adhesive strength between gel plugging material and rock wall surface
CN113777028B (en) * 2021-11-11 2022-01-18 成都理工大学 Device and method for measuring adhesive strength between gel plugging material and rock wall surface
CN114874749A (en) * 2022-05-05 2022-08-09 水利部交通运输部国家能源局南京水利科学研究院 Underwater plugging material and preparation method thereof

Also Published As

Publication number Publication date
CN1035783C (en) 1997-09-03

Similar Documents

Publication Publication Date Title
CN1035783C (en) Caulking technology with tarring
CN106013259B (en) Shake the underground engineering concrete structure deformation joint blocking method under bumpy weather
US4233015A (en) Employing quicklime in stabilizing earth
RU2670808C9 (en) Method for enhancing oil recovery (variants)
CN101863643A (en) Hydrophobic gel composite cement and plugging method thereof
CN108505514B (en) Construction method of mud retaining wall of pile foundation in complex stratum
CN113898817A (en) Trenchless crack embedding repair method for large-diameter drainage pipeline
CN111424613A (en) Method for treating through cracks of roller compacted concrete dam
CN106753299A (en) A kind of thin oil well selective water shutoff agent and preparation method and application
CN1887778A (en) Backfill to buried pipe heat exchanger through hole
CN103787630A (en) Anti-cracking thermal-insulating cement mortar and preparation method thereof
CN204254073U (en) A kind of pre-stress steel cylinder RPC tubing
CN113956857A (en) Plugging agent, plugging material and well drilling completion leakage plugging method
CN109779287A (en) Microdilatancy water-proof emulsion construction technology
CN107218010B (en) Water plugging bridge plug for damaged drilling sleeve and double-bridge plug type water plugging method
CN102912795B (en) Device and method for stopping leakage by grouting low-heat asphalt
CN100345932C (en) Cement permeation promoter for oil and gas well
CN1868960A (en) Underground pipe heat exchanger hole drilling refilling material
RU2435020C2 (en) Procedure for insulation of water inflowing pay in well and heat insulating pipe for its implementation
CN206579538U (en) A kind of heated bitumen tanker heater
CN208563339U (en) A kind of glued crack processing engineering grouting equipment
CN106948336A (en) A kind of grouting strengthening method based on thermodynamic principles
CN209669695U (en) A kind of super slime flux pipe device of environmental protection
CN214925520U (en) Maintenance spray set suitable for concrete panel
KR102531914B1 (en) Retrograde water pressure waterproofing method for building maintenance

Legal Events

Date Code Title Description
C10 Entry into substantive examination
SE01 Entry into force of request for substantive examination
C06 Publication
PB01 Publication
C14 Grant of patent or utility model
GR01 Patent grant
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