CN111593768A - Rubber water stop for pipe gallery deformation joint and construction method thereof - Google Patents
Rubber water stop for pipe gallery deformation joint and construction method thereof Download PDFInfo
- Publication number
- CN111593768A CN111593768A CN202010235720.1A CN202010235720A CN111593768A CN 111593768 A CN111593768 A CN 111593768A CN 202010235720 A CN202010235720 A CN 202010235720A CN 111593768 A CN111593768 A CN 111593768A
- Authority
- CN
- China
- Prior art keywords
- water stop
- deformation joint
- pipe gallery
- air bag
- hollow cavity
- 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
Links
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D29/00—Independent underground or underwater structures; Retaining walls
- E02D29/16—Arrangement or construction of joints in foundation structures
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D29/00—Independent underground or underwater structures; Retaining walls
- E02D29/10—Tunnels or galleries specially adapted to house conduits, e.g. oil pipe-lines, sewer pipes ; Making conduits in situ, e.g. of concrete ; Casings, i.e. manhole shafts, access or inspection chambers or coverings of boreholes or narrow wells
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D31/00—Protective arrangements for foundations or foundation structures; Ground foundation measures for protecting the soil or the subsoil water, e.g. preventing or counteracting oil pollution
- E02D31/02—Protective arrangements for foundations or foundation structures; Ground foundation measures for protecting the soil or the subsoil water, e.g. preventing or counteracting oil pollution against ground humidity or ground water
Abstract
The application provides a rubber water stop for a pipe gallery deformation joint and a construction method thereof, and belongs to the technical field of building waterproof facilities. Rubber waterstop for piping lane movement joint includes: a water stop body; the two limiting parts are respectively arranged on two opposite sides of the water stop belt and are respectively used for being embedded on two sides of the deformation joint; the hollow cavity is arranged in the middle of the water stop belt body, extends along the length direction of the water stop belt body, and is sealed at two ends in the length direction; at least one air bag is arranged in the hollow cavity; and the communicating nozzle pipe is communicated with the air bag and penetrates out of the hollow cavity. Have multiple waterproof facilities, at first the waterproof role of waterstop body, when cavity on the waterstop took place the damage, the gasbag inside the cavity can play waterproof effect through aerifing the inflation, when the gasbag takes place the damage, carries out the slip casting in the gasbag, treats the concrete setting back, and the piping lane movement joint can be filled to the concrete, plays water-proof effects.
Description
Technical Field
The invention belongs to the technical field of building waterproof facilities, and particularly relates to an inflatable rubber water stop capable of grouting and plugging for a pipe gallery deformation joint and a construction method thereof.
Background
In the domestic comprehensive pipe gallery engineering, when deformation joints among all sections of a pipe gallery are treated, most of adopted buried rubber water stops are subjected to waterproof treatment. The method can really play a waterproof function under normal conditions, but because the pipe gallery is linear engineering, the geological conditions are different, the uneven settlement rate of each pipe gallery segment is not completely consistent, and the center hole area of the buried rubber water stop belt can be damaged, so that the deformation joint leakage phenomenon is generated.
Disclosure of Invention
In view of the above, the invention aims to provide a rubber waterstop for a pipe gallery deformation joint and a construction method thereof, so as to solve the problems that in the prior art, the pipe gallery sections are not uniform, the settlement rates are inconsistent, the central hole area of the waterstop is damaged, and the deformation joint leakage is generated.
In a first aspect, the present application provides a rubber waterstop for piping lane movement joint, includes:
a water stop body;
the two limiting parts are respectively arranged on two opposite sides of the water stop belt and are respectively used for being embedded at two sides of the deformation joint;
the hollow cavity is arranged in the middle of the water stop belt body, extends along the length direction of the water stop belt body, and two ends of the hollow cavity in the length direction are sealed;
at least one air bag is arranged in the hollow cavity;
and the communicating nozzle pipe is communicated with the air bag and penetrates out of the hollow cavity.
Preferably, the number of the air bags is several, and each air bag is arranged along the length direction of the hollow cavity.
Preferably, each air bag is connected with one communication nozzle pipe, and the communication nozzle pipe can inject gas and/or mud.
Preferably, the hollow cavities are provided with a plurality of cavities, and the hollow cavities are sequentially arranged along the length direction of the water stop belt body.
Preferably, each hollow cavity is provided with one air bag.
Preferably, each of the limiting portions is of a long strip structure and is arranged along the length direction of the water stop strip plate body.
In a second aspect, the application provides a construction method of a rubber water stop for a deformation joint of a pipe gallery, which comprises the following steps:
step one, installing a water stop at a pre-buried position of a deformation joint of a pipe gallery;
secondly, arranging a communication nozzle pipe of the water stop belt on the concrete surface of the deformation joint of the pipe gallery;
and step three, acquiring the water stopping condition of the water stopping belt, and if the water stopping belt has a water leakage problem, inflating or grouting the air bag of the water stopping belt through the communicating nozzle pipe so as to stop leakage.
Preferably, the first step includes:
firstly, building the pipe gallery deformation joint to the pre-buried position of the water stop belt;
installing the water stop belt to a pre-buried position;
and continuing to construct the pipe gallery deformation joint until the pipe gallery deformation joint is complete.
Preferably, in the second step, the communication nozzle needs to extend out of the pipe gallery deformation joint and keep the cleanness of the communication nozzle, so that the communication nozzle inflates or injects the air bag in the water stop.
Preferably, in the third step, the water stopping condition of the water stop belt includes:
and (4) normal water stopping: no treatment is carried out;
the cavity is damaged, the gasbag is normal, and leak: inflating the air bag through the communication nozzle tube to expand the air bag so as to stop leakage;
the hollow cavity and the air bag are damaged and generate water leakage: through the intercommunication nozzle is right the gasbag carries out the slip casting, the separation the piping lane movement joint to the leak-stopping.
The application has the following beneficial effects:
the application provides a rubber waterstop for piping lane movement joint and construction method thereof, waterstop wherein has multiple waterproof facility, and at first the waterproof effect of waterstop body when the cavity on the waterstop takes place the damage, can play waterproof effect through aerifing the inflation at the inside gasbag of cavity, works as when the gasbag takes place the damage, carries out the slip casting in to the gasbag, treats the concrete setting back, and the piping lane movement joint can be filled to the concrete, plays water-proof effects.
Drawings
The above and other objects, features and advantages of the present invention will become more apparent from the following description of the embodiments of the present invention with reference to the accompanying drawings.
FIG. 1 is a cross-sectional view of a water stop provided in accordance with an embodiment of the present invention after installation;
FIG. 2 is a schematic cross-sectional view of a water stop provided in accordance with an embodiment of the present invention;
fig. 3 is a top view of a water stop provided according to an embodiment of the present invention.
Wherein, 1-water stop belt, 2-deformation joint;
11-a communicating nozzle pipe, 12-a water stop belt body, 13-a hollow cavity, 14-an air bag and 15-a limiting part.
Detailed Description
Various embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. Like elements in the various figures are denoted by the same or similar reference numerals. For purposes of clarity, the various features in the drawings are not necessarily drawn to scale.
Referring to fig. 1, 2 and 3, in a first aspect, the present application provides a rubber water stop for a pipe gallery deformation joint, comprising: a water stop body 12; the two limiting parts 15 are respectively arranged on two opposite sides of the water stop belt 1, and the two limiting parts 15 are respectively used for being embedded in two sides of the deformation joint 2; the hollow cavity 13 is arranged in the middle of the water stop belt body 12, the hollow cavity 13 extends along the length direction of the water stop belt body 12, and two ends of the hollow cavity 13 in the length direction are closed; at least one air bag 14 is arranged in the hollow cavity 13; and the communication nozzle pipe 11 is communicated with the air bag 14 and penetrates out of the hollow cavity 13.
In this embodiment, the cross-section of cavity 13 is the ring form, and is single cavity 13 is the hollow stick of a rubber, and its and waterstop body 12 structure as an organic whole, and when using, cavity 13 set up in piping lane movement joint 2, through the waterproof effect of partition realization to movement joint 2.
In this embodiment, the number of the air bags 14 is several, and each air bag 14 is respectively arranged along the length direction of the hollow cavity 13. It should be understood that the water stop body 12 is provided with the hollow cavity 13, and a plurality of the air bags 14 are arranged in the hollow cavity 13, so that the two adjacent air bags 14 are connected end to end. The arrangement of one air bag 14 is avoided, the use of the whole water stop 1 is prevented from being influenced after the air bag 14 is broken, and the arrangement of a plurality of air bags 14 ensures that the air bag 14 is broken at a single position and only needs targeted repair, and the use effect of the air bags 14 at other intact positions is not influenced.
In the present embodiment, each air bag 14 is connected to one of the communication nozzles 11, and the communication nozzle 11 can inject gas and/or slurry. The air bag 14 is expanded through gas injection to play a water stopping role, after the air bag 14 is broken, grouting (injecting concrete or mud) is carried out in the air bag 14 to enable concrete to be condensed, the blocking role is played, and water prevention can be achieved.
In an optional embodiment, a plurality of hollow cavities 13 are provided, and the hollow cavities 13 are sequentially arranged along the length direction of the water stop body 12. Each hollow cavity 13 is provided with one air bag 14. The plurality of hollow cavities 13 are arranged on the water stop body 12, so that each hollow cavity 13 is in an independent closed state, the problem of leakage caused by damage of one hollow cavity 13 is solved, when the problem of leakage of the hollow cavity 13 at a single position occurs, only targeted leakage prevention is needed, the cost of leakage stopping treatment of the water stop 1 is reduced, and the overall structure of other intact hollow cavities 13 cannot be damaged.
In this embodiment, each of the limiting portions 15 is a long strip structure and is disposed along the length direction of the plate body of the water stop 1. The effect that waterstop 1 both sides set up spacing portion 15 is in the concrete of fixing each spacing portion 15 to 2 both sides of piping lane movement joint, makes the fixed of waterstop 1 more firm.
In a second aspect, the application provides a construction method of a rubber water stop for a deformation joint of a pipe gallery, which comprises the following steps: step one, installing a water stop belt 1 at a pre-buried position of a pipe gallery deformation joint 2; secondly, arranging a communication nozzle pipe 11 of the water stop belt 1 on the concrete surface of the pipe gallery deformation joint 2; and step three, acquiring the water stopping condition of the water stopping belt 1, and if the water leakage problem occurs, inflating or grouting the air bag 14 of the water stopping belt 1 through the communication nozzle pipe 11 so as to stop leakage.
In this embodiment, the first step includes: firstly, building the pipe gallery deformation joint 2 to the pre-buried position of the water stop belt 1; installing the water stop 1 to a pre-buried position; and continuing to construct the pipe gallery deformation joint 2 until the pipe gallery deformation joint 2 is formed completely.
As the skilled person in the art will understand, the installation of the water stop strip 1 is installed in the process of building the pipe gallery, and the water stop strip 1 is pre-buried in the concrete on both sides of the deformation joint 2 of the pipe gallery.
In this embodiment, in the second step, the communication nozzle 11 needs to extend out of the pipe gallery deformation joint 2, and the tidiness of the communication nozzle 11 is kept, so that the communication nozzle 11 inflates or injects the air bag 14 in the water stop 1.
In this embodiment, in the third step, the water stopping condition of the water stop 1 includes:
and water stopping is normal, namely the hollow cavity 13 has a good water stopping effect, and the hollow cavity is not treated.
The hollow cavity 13 is broken, the air bag 14 is normal, and water leakage occurs: the air bag 14 is inflated through the communication nozzle 11, so that the air bag 14 is expanded to stop leakage.
The hollow cavity 13 and the air bag 14 are damaged, and water leakage occurs: the air bag 14 is grouted (concrete) through the communication nozzle pipe 11, and after the concrete is solidified, the pipe gallery deformation joint 2 is isolated, so that leakage is prevented.
The application provides a rubber waterstop for piping lane movement joint and construction method thereof, waterstop 1 wherein has multiple waterproof facility, and at first waterstop body 12's waterproof effect, when cavity 13 on waterstop 1 takes place the damage, can play waterproof effect through inflating inflation at cavity 13 inside gasbag 14, works as when gasbag 14 takes place the damage, carries out the slip casting in the gasbag 14, treats the concrete solidification back, and the concrete can fill piping lane movement joint 2, plays waterproof effect.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
Finally, it should be noted that: it should be understood that the above examples are only for clearly illustrating the present invention and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications of the invention may be made without departing from the scope of the invention.
Claims (10)
1. The utility model provides a rubber waterstop for piping lane movement joint which characterized in that includes:
a water stop body;
the two limiting parts are respectively arranged on two opposite sides of the water stop belt and are respectively used for being embedded at two sides of the deformation joint;
the hollow cavity is arranged in the middle of the water stop belt body, extends along the length direction of the water stop belt body, and two ends of the hollow cavity in the length direction are sealed;
at least one air bag is arranged in the hollow cavity;
and the communicating nozzle pipe is communicated with the air bag and penetrates out of the hollow cavity.
2. The rubber water stop for the pipe gallery deformation joint according to claim 1, wherein the air bags are arranged in a plurality, and each air bag is arranged along the length direction of the hollow cavity.
3. The rubber waterstop for pipe gallery deformation joints according to claim 2, wherein each air bag is connected with one communication nozzle capable of injecting gas and/or slurry.
4. The rubber water stop for the pipe gallery deformation joint according to claim 1, wherein a plurality of hollow cavities are arranged, and the hollow cavities are sequentially arranged along the length direction of the water stop body.
5. The rubber water stop for the pipe gallery deformation joint according to claim 4, wherein one air bag is arranged in each hollow cavity.
6. The rubber waterstop for a pipe gallery deformation joint according to claim 1, wherein each of the limiting parts is of a long strip structure and is arranged along the length direction of the waterstop plate body.
7. A construction method of a rubber water stop for a pipe gallery deformation joint is characterized by comprising the following steps:
step one, installing a water stop at a pre-buried position of a deformation joint of a pipe gallery;
secondly, arranging a communication nozzle pipe of the water stop belt on the concrete surface of the deformation joint of the pipe gallery;
and step three, acquiring the water stopping condition of the water stopping belt, and if the water stopping belt has a water leakage problem, inflating or grouting the air bag of the water stopping belt through the communicating nozzle pipe so as to stop leakage.
8. The construction method of the rubber water stop for the pipe gallery deformation joint according to claim 7, wherein the first step comprises the following steps:
firstly, building the pipe gallery deformation joint to the pre-buried position of the water stop belt;
installing the water stop belt to a pre-buried position;
and continuing to construct the pipe gallery deformation joint until the pipe gallery deformation joint is complete.
9. The construction method of the rubber water stop for the pipe gallery deformation joint according to claim 7, wherein in the second step, the communication nozzle pipe needs to extend out of the pipe gallery deformation joint and keep the cleanness of the communication nozzle pipe, so that the communication nozzle pipe can inflate or slip the air bag in the water stop.
10. The construction method of the rubber water stop for the pipe gallery deformation joint according to claim 7, characterized in that in the third step, the water stop condition of the water stop comprises the following steps:
and (4) normal water stopping: no treatment is carried out;
the cavity is damaged, the gasbag is normal, and leak: inflating the air bag through the communication nozzle tube to expand the air bag so as to stop leakage;
the hollow cavity and the air bag are damaged and generate water leakage: through the intercommunication nozzle is right the gasbag carries out the slip casting, the separation the piping lane movement joint to the leak-stopping.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN202010235720.1A CN111593768B (en) | 2020-03-30 | 2020-03-30 | Rubber water stop for pipe gallery deformation joint and construction method thereof |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN202010235720.1A CN111593768B (en) | 2020-03-30 | 2020-03-30 | Rubber water stop for pipe gallery deformation joint and construction method thereof |
Publications (2)
Publication Number | Publication Date |
---|---|
CN111593768A true CN111593768A (en) | 2020-08-28 |
CN111593768B CN111593768B (en) | 2022-01-25 |
Family
ID=72191075
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CN202010235720.1A Active CN111593768B (en) | 2020-03-30 | 2020-03-30 | Rubber water stop for pipe gallery deformation joint and construction method thereof |
Country Status (1)
Country | Link |
---|---|
CN (1) | CN111593768B (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN112813926A (en) * | 2021-01-06 | 2021-05-18 | 四川省水利科学研究院 | Hydraulic engineering seam-crossing rear-mounted built-in water stop assembly structure and construction method |
CN114892721A (en) * | 2022-04-23 | 2022-08-12 | 湖南华纬水电工程有限公司 | Weak soil stratum piping lane movement joint waterproof construction |
CN115627845A (en) * | 2022-10-28 | 2023-01-20 | 中国一冶集团有限公司 | Cast-in-place concrete deformation joint waterproof structure and construction method |
Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN2446192Y (en) * | 2000-09-27 | 2001-09-05 | 全日升工程有限公司 | Protecting structure of waterstop |
CN2863885Y (en) * | 2005-12-08 | 2007-01-31 | 山东龙祥橡塑制品有限公司 | Composite water stop |
CN202690084U (en) * | 2012-06-30 | 2013-01-23 | 西北橡胶塑料研究设计院 | Hollow inflatable waterproof rubber tape for water structure seam |
CN106149762A (en) * | 2016-06-28 | 2016-11-23 | 中铁二院重庆勘察设计研究院有限责任公司 | A kind of middle buried water stop structure of the active-passive integrated sealing for construction joint |
CN106400836A (en) * | 2016-11-11 | 2017-02-15 | 中国水利水电第八工程局有限公司 | Comprehensive pipe rack |
CN207392242U (en) * | 2017-11-07 | 2018-05-22 | 江苏燕宁建设工程有限公司 | Piping lane waterproof structure for deformation seams and piping lane |
CN208586656U (en) * | 2018-08-03 | 2019-03-08 | 中铁隆工程集团有限公司 | A kind of middle buried water stop with dispersion decompression function |
CN209066505U (en) * | 2018-09-29 | 2019-07-05 | 常亮 | A kind of diaphragm wall circular construction joint waterproof construction |
-
2020
- 2020-03-30 CN CN202010235720.1A patent/CN111593768B/en active Active
Patent Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN2446192Y (en) * | 2000-09-27 | 2001-09-05 | 全日升工程有限公司 | Protecting structure of waterstop |
CN2863885Y (en) * | 2005-12-08 | 2007-01-31 | 山东龙祥橡塑制品有限公司 | Composite water stop |
CN202690084U (en) * | 2012-06-30 | 2013-01-23 | 西北橡胶塑料研究设计院 | Hollow inflatable waterproof rubber tape for water structure seam |
CN106149762A (en) * | 2016-06-28 | 2016-11-23 | 中铁二院重庆勘察设计研究院有限责任公司 | A kind of middle buried water stop structure of the active-passive integrated sealing for construction joint |
CN106400836A (en) * | 2016-11-11 | 2017-02-15 | 中国水利水电第八工程局有限公司 | Comprehensive pipe rack |
CN207392242U (en) * | 2017-11-07 | 2018-05-22 | 江苏燕宁建设工程有限公司 | Piping lane waterproof structure for deformation seams and piping lane |
CN208586656U (en) * | 2018-08-03 | 2019-03-08 | 中铁隆工程集团有限公司 | A kind of middle buried water stop with dispersion decompression function |
CN209066505U (en) * | 2018-09-29 | 2019-07-05 | 常亮 | A kind of diaphragm wall circular construction joint waterproof construction |
Non-Patent Citations (1)
Title |
---|
吕勇刚,黄清飞,刘洪洲,李塔: "长大深埋节段式沉管隧道节段接头构造方案比选", 《现代隧道技术》 * |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN112813926A (en) * | 2021-01-06 | 2021-05-18 | 四川省水利科学研究院 | Hydraulic engineering seam-crossing rear-mounted built-in water stop assembly structure and construction method |
CN112813926B (en) * | 2021-01-06 | 2021-12-31 | 四川省水利科学研究院 | Hydraulic engineering seam-crossing rear-mounted built-in water stop assembly structure and construction method |
CN114892721A (en) * | 2022-04-23 | 2022-08-12 | 湖南华纬水电工程有限公司 | Weak soil stratum piping lane movement joint waterproof construction |
CN114892721B (en) * | 2022-04-23 | 2024-02-02 | 湖南华纬水电工程有限公司 | Soft soil stratum piping lane movement joint waterproof construction |
CN115627845A (en) * | 2022-10-28 | 2023-01-20 | 中国一冶集团有限公司 | Cast-in-place concrete deformation joint waterproof structure and construction method |
Also Published As
Publication number | Publication date |
---|---|
CN111593768B (en) | 2022-01-25 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
CN111593768B (en) | Rubber water stop for pipe gallery deformation joint and construction method thereof | |
CN109505634A (en) | Emergency type water-impervious airbag apparatus and its application method in tunnel | |
CN111926841A (en) | Dewatering well water-carrying plugging structure and construction method thereof | |
WO2004053237A3 (en) | Method for construction of piers in soil and a pier construction | |
CN209430219U (en) | Emergency type water-impervious airbag apparatus in tunnel | |
KR102155058B1 (en) | Steel pipe multi-stage grouting device | |
JP3234327U (en) | Air-filled waterproof airbag structure | |
KR960014544A (en) | Ground reinforcement pile method | |
CN112854211A (en) | Waterproof plugging construction method for drilling hole of anchoring end of anti-floating anchor rod | |
CN112282796A (en) | Pressure-adjustable waterproof plate suitable for cold region tunnel and construction method | |
CN111119927A (en) | Tunnel three-dimensional waterproof and drainage system and construction technology | |
CN116411593A (en) | Slurry stopping device for preventing vertical joint of prefabricated diaphragm wall from flowing around and construction method | |
RU2209269C1 (en) | Support of contact network erected on swelling soils | |
CN116122295A (en) | Building prestress supporting structure with feedback adjustment for foundation pit protection | |
CN210217779U (en) | Movable tunnel device that blocks water | |
US4889449A (en) | Slipliner grouting method and system | |
KR100310457B1 (en) | Waterproofing method of concrete structure | |
CN114718100B (en) | Water-stop grouting construction method | |
CN109469075B (en) | Landslide control method | |
CN205444505U (en) | High compression swelling formula prevention of seepage construction equipment | |
JPS6126429Y2 (en) | ||
JPH09144000A (en) | Method and device for retaining earth | |
CN204849770U (en) | Packer | |
CN113565536B (en) | Device for preventing and controlling mud and sand burst of tunnel lining drilling and mounting method | |
CN105908746B (en) | A kind of pile concrete drill core after-teeming sizing device and after-teeming paste-making 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 | ||
GR01 | Patent grant | ||
GR01 | Patent grant |