CN102261517A - Method for mounting prestress steel cylinder concrete pipe in narrow space in sleeve - Google Patents
Method for mounting prestress steel cylinder concrete pipe in narrow space in sleeve Download PDFInfo
- Publication number
- CN102261517A CN102261517A CN 201110195553 CN201110195553A CN102261517A CN 102261517 A CN102261517 A CN 102261517A CN 201110195553 CN201110195553 CN 201110195553 CN 201110195553 A CN201110195553 A CN 201110195553A CN 102261517 A CN102261517 A CN 102261517A
- Authority
- CN
- China
- Prior art keywords
- pipe
- prestressed concrete
- concrete cylinder
- sleeve
- prestressed
- 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
Landscapes
- On-Site Construction Work That Accompanies The Preparation And Application Of Concrete (AREA)
Abstract
The invention discloses a method for mounting a prestress steel cylinder concrete pipe in a narrow space in a sleeve. The sleeve comprises an inner pipe and an outer pipe. The method comprises the following steps of: measuring at fixed points before construction; setting an axis, carrying out bulge test and grouting; fixing and laying steel rails in the outer pipe; placing a trolley for loading the inner pipe on the steel rails; jacking the trolley up at a specific position, and taking the trolley back; placing a three-way regulating device which regulates the inner pipe in the three-dimensional direction below the trolley; fixedly connecting a permanent steel gasket below the inner pipe after regulation; and carrying out bulge test and grouting seal at the junction of two inner pipes which are equipped with seal pieces, and mounting the inner pipes in the sleeve section by section sequentially until the finish of the construction. According to the the method, the prestress steel cylinder concrete pipe with the diameter of 2m is installed in the sleeve with the inner diameter of 3m, the sleeve is internally provided with two steel rails for loading the trolley, and the difficulty in the installation of the prestress steel cylinder concrete pipe in the sleeve is overcome; a jack and a winch are both minitype devices, the trolley is self-manufactured in field, the investment is less, and the cost is low; and the construction cycle is short, the proceed is rapid, and the mounting quality is good.
Description
Technical field
The present invention relates to a kind of pipe installation method of supply and drain water system, particularly relate to the method for construction that φ 2m Prestressed concrete cylinder pipe is installed in a kind of φ 3m concrete sleeve.
Background technique
In the water supply and sewage work, the Prestressed concrete cylinder pipe (PCCP) of a large-scale concentric is installed in a big molded cannula again, similarly prior art is a prestressed cylinder concrete pipe in the tunnel.Prestressed cylinder concrete pipe in the tunnel, to the transportation of Prestressed concrete cylinder pipe with install and adopt the special-purpose pipe car of carrying on the back, with carrying pipe car prestressed cylinder concrete pipe on the back, track is wanted horizontal arrangement, also need deployment rails that backing plate is installed, the backing plate bottom needs concreting, and it is big both to have taken up room, and cost and expense are also higher.Large-sized prestress steel cylinder concrete pipe is installed in the big molded cannula in the subfluvial tunnel again, its Prestressed concrete cylinder pipe is to hang work surface under two vertical shafts by the two sides, river, the interior space, place of vertical shaft was limited after Prestressed concrete cylinder pipe entered vertical shaft, was not suitable for the large-scale pipe car of carrying on the back and operated.
Summary of the invention
The technical problem to be solved in the present invention provide a kind of cost low, do not take the vertical shaft work surface, use that conventional instrument is installed, the method for prestressed cylinder concrete pipe in the narrow space in the sleeve pipe easy and simple to handle.
The method of prestressed cylinder concrete pipe in the narrow space in the sleeve pipe of the present invention comprises the engineering prefixed point measurement of carrying out before the piping erection Prestressed concrete cylinder pipe; Emit the axis of push pipe, and high-rise control point is guided in the operation vertical shaft; In the junction Sealing is set before the two joint Prestressed concrete cylinder pipe butt joints, to installing two Prestressed concrete cylinder pipe joints of Sealing, suppress and carry out leakage test in pipe inside in the junction, at the process step of the outside sealing of being in the milk of pipe, its process step also comprises:
Lay jack between step 4, the front and back force bearing plate that sets in advance in supporting base that sleeve bottom sets in advance and Prestressed concrete cylinder pipe both sides, and the jack-up jack, regain dolly,
After step 6, Prestressed concrete cylinder pipe are adjusted to design attitude, at the affixed permanent billet between sleeve pipe of Prestressed concrete cylinder pipe,
The operating method of step 7, repeating step 1～6 is installed next joint Prestressed concrete cylinder pipe, the preceding Sealing of placing in the junction of two joint Prestressed concrete cylinder pipe butt joints,
The operating method of step 9, repetitive cycling step 1～6, step 8 one saves prestressed cylinder concrete pipe in sleeve pipe successively, finishes until engineering.
The method of prestressed cylinder concrete pipe in the narrow space in the sleeve pipe of the present invention, wherein said dolly is made of force-bearing steel plate, wheel carrier and wheel.
The method of prestressed cylinder concrete pipe in the narrow space in the sleeve pipe of the present invention, wherein said three-way adjustment device is made up of the lifting body on upper strata, the horizontal conveying mechanism in middle level and vertical conveying mechanism of lower floor, laterally conveying mechanism is provided with horizontal scroll wheel, vertically conveying mechanism is provided with vertical scroll wheel, and jack is installed on the upper strata.
In the sleeve pipe of the present invention in the narrow space method difference from prior art of prestressed cylinder concrete pipe be in the sleeve pipe of the present invention that the method for prestressed cylinder concrete pipe is that the Prestressed concrete cylinder pipe of 2m diameter is installed in the narrow space in 3m internal diameter sleeve pipe, made full use of the limited construction space in the sleeve pipe, in sleeve pipe, arrange two rail perpendicular to sleeve pipe, two rails becomes 60 degree angles, dolly is set on the rail, need not to use large-scale special device, solved the technical barrier of prestressed cylinder concrete pipe in the narrow space.Be used for jack, the winch of installation in the sleeve pipe, be mini-plant, use dexterity, buying is convenient, and dolly and backing plate can be made by oneself at the scene, less investment, and cost is little, economic benefit is obvious.The whole pipe installation cycle is short, and install a prover section average every day, and progress is fast, and installation quality is good.
Be described further below in conjunction with the method for accompanying drawing prestressed cylinder concrete pipe in the narrow space in the sleeve pipe of the present invention.
Description of drawings
Fig. 1 for prestressed cylinder concrete pipe in the narrow space in the sleeve pipe of the present invention structural representation.
Fig. 2 is the process flow diagram of prestressed cylinder concrete pipe in the narrow space in the sleeve pipe of the present invention.
Fig. 3 is the view of Prestressed concrete cylinder pipe on dolly and track.
Fig. 4 is the view before Prestressed concrete cylinder pipe and dolly thereof enter sleeve pipe.
Fig. 5 is the view after Prestressed concrete cylinder pipe and dolly thereof enter sleeve pipe.
Fig. 6 is the schematic representation that the jack-up jack reclaims dolly on supporting base, the dunnage.
Fig. 7 adjusts the scheme of installation of equipment below Prestressed concrete cylinder pipe for three-dimensional.
Fig. 8 adjusts the equipment organigram for three-dimensional.
Fig. 9 is Prestressed concrete cylinder pipe joint grouting sealing state schematic representation.
Embodiment
As shown in Figure 1 and Figure 2, the method for prestressed cylinder concrete pipe in the narrow space in the sleeve pipe of the present invention.Carry out the measurement of engineering prefixed point before comprising prestressed cylinder concrete pipe 3, emit the axis of push pipe, and high-rise control point is guided in the operation vertical shaft 1; In the junction Sealing is set before 3 butt joints of two joint Prestressed concrete cylinder pipes, in two Prestressed concrete cylinder pipes, the 3 joint junctions that install Sealing, suppress and carry out leakage test in pipe inside, at the process step of the outside sealing of being in the milk of pipe, its process step also comprises:
Lay jack 6 between the force bearing plate 8 that step 4, the supporting base 9 that sets in advance in sleeve pipe 2 bottoms and Prestressed concrete cylinder pipe 3 both sides set in advance, and jack-up jack 6, regain dolly,
After step 6, Prestressed concrete cylinder pipe 3 are adjusted to design attitude, affixed permanent billet between Prestressed concrete cylinder pipe 3 and sleeve pipe 2.
The operating method of step 7, repeating step 1～6 is installed the preceding Sealing of placing in the junction of next joint Prestressed concrete cylinder pipe 3, two joint Prestressed concrete cylinder pipes 3 butt joint.
The operating method of step 9, repetitive cycling step 1～6, step 8 one saves prestressed cylinder concrete pipe 3 in sleeve pipe 2 successively, finishes until engineering.
At above-mentioned process step, more elaborate below in conjunction with the method for accompanying drawing to prestressed cylinder concrete pipe in the narrow space in the sleeve pipe of the present invention.
As shown in Figure 3, under in vertical shaft 1, hang Prestressed concrete cylinder pipe 3 before, on track 5, place earlier dolly 4.The Prestressed concrete cylinder pipe 3 that hangs down in the vertical shaft 1 is placed on the dolly 4.The dolly 4 that is loaded with at Prestressed concrete cylinder pipe 3 is inserted sleeve pipe 2 by track 5.
Dolly 4 is made of the on-the-spot self-control of steel plate, wheel carrier and wheel.Wheelbase 4.5m.The two-wheeled angle is processed into 60 ° of angles, guarantees dolly normally operation in orbit.
As shown in Figure 4, the dolly 4 that is placed with Prestressed concrete cylinder pipe 3 can move on the track in the sleeve pipe 25.Prestressed concrete cylinder pipe 3 is realized by available chain block of the transportation of dolly 4 in sleeve pipe 2 or winch.Before being installed, first segment Prestressed concrete cylinder pipe 3 needs in vertical shaft 1, to be provided with earlier the counter-force point.The back crossbeam is as Point of Strength on the bellmouth of waiting to draw in Prestressed concrete cylinder pipe 3 or socket, can be with previous mounted Prestressed concrete cylinder pipe 3 as the counter-force point when follow-up pipeline is installed.Prestressed concrete cylinder pipe 3 installed positions should place the steel plate cushion block in advance, as the bearing of adjusting jack 6.
As Fig. 5, shown in Figure 6, after Prestressed concrete cylinder pipe 3 is in place, place jack 6 in the supporting base and the dunnage position of regulation, the distance between this moment track 5 and the pipeline 2 is 158mm.Jacking 40mm jack 6 upwards, the jacking process should keep each jack 6 synchronous, hauls out dolly 4 after jacking is finished and is the usefulness of follow-up Prestressed concrete cylinder pipe 3 installations.
As shown in Figure 7, after dolly 4 takes out, on backing plate, place three-way adjustment device 7.As shown in Figure 8, three-way adjustment device 7 is made up of the lifting body 10 on upper strata, the horizontal conveying mechanism 11 in middle level and vertical conveying mechanism 12 of lower floor.Laterally conveying mechanism 11 is provided with horizontal scroll wheel, and vertically conveying mechanism 12 is provided with vertical scroll wheel, and the upper strata rises top mechanism 10 and is provided with jack.Wheel by horizontal conveying mechanism 11 and vertical conveying mechanism 12 moves, can adjust pipeline in length and breadth to the position, can adjust Prestressed concrete cylinder pipe 3 upper-lower positions by lifting body 10, thereby Prestressed concrete cylinder pipe 3 is accurately adjusted to design attitude.Be in course of adjustment, jack 6 is regained in three-way adjustment device 7 upwards jacking earlier.After Prestressed concrete cylinder pipe 3 is adjusted to accurate position, need be at the Prestressed concrete cylinder pipe of installing between Prestressed concrete cylinder pipe 3 and the sleeve pipe 2 after nonvolatil cushion block supports whole joint 3.Cushion block is welded by steel plate, and a joint Prestressed concrete cylinder pipe 3 needs four cushion blocks altogether, is placed on the both sides of track 5 respectively.Cushion block and track 5 adopt and are welded to connect, and cushion block has enough strength and stiffness support Prestressed concrete cylinder pipe 3 deadweights and the Guan Zhongshui weight under the normal operation.After cushion block installed, the lifting body 10 of retraction three-way adjustment device 7 just can take out three-way adjustment device 7.
After 3 installations of first segment Prestressed concrete cylinder pipe, repeat above-mentioned steps and can finish follow-up Prestressed concrete cylinder pipe 3 installations.When carrying out step 5, should stay the 30cm distance between back one joint Prestressed concrete cylinder pipe 3 and the last joint Prestressed concrete cylinder pipe 3, for placing three-way adjustment device 7, fetching jack 6 and place rubber seal and reserve the operating space, by moving forward and backward of three-way adjustment device 7 the 2-section pipe road is held out against afterwards.As shown in Figure 9, at last two Guan Cheng, socket joint are carried out bulge test and the joint grouting sealing of the pipe outside.Bulge test is carried out in pipeline, suppresses after suppressing equipment and reservation pressurizing port on the Prestressed concrete cylinder pipe 3 being connected, and internal pressure loss is not more than specified value at the appointed time.If the excessive situation of seepage or pressure decline is arranged, must pull down Prestressed concrete cylinder pipe 3 refittings.The intact joint Prestressed concrete cylinder pipe 3 of every dress all should in time carry out the joint bulge test, and pass the test can be carried out the installation of next pipe joint.The 1:2 slush is adopted in the grouting of Prestressed concrete cylinder pipe 3 seam lateral joints, because the space is too narrow and small, joint grouting must have been stayed sealing strip earlier in the pipe outside when Prestressed concrete cylinder pipe 3 is installed.The inboard application 1 of pipe joint: the floating tube-surface of 1.5～2 mortars.
After Prestressed concrete cylinder pipe 3 all installs, need all seams are carried out the secondary bulge test.After installation check was all qualified, the space that Prestressed concrete cylinder pipe 3 and sleeve pipe are 2 also needed the full sand of backfill, and in service to prevent water flowing, Prestressed concrete cylinder pipe 3 positions are subjected to displacement.Irritate the method that sand adopts pump to take out, water flows out, and sand precipitates, and progressively is full of the space.
Above-described embodiment is described preferred implementation of the present invention; be not that scope of the present invention is limited; design under the prerequisite of spirit not breaking away from the present invention; various distortion and improvement that those of ordinary skills make technological scheme of the present invention all should fall in the definite protection domain of claims of the present invention.
Claims (1)
1. the method for prestressed cylinder concrete pipe in the narrow space in the sleeve pipe comprises that prestressed cylinder concrete pipe (3) carries out the engineering prefixed point before and measures, and emits the axis of push pipe, and high-rise control point is guided in the operation vertical shaft (1); In the junction Sealing is set before two joint Prestressed concrete cylinder pipe (3) butt joints, to installing two Prestressed concrete cylinder pipes (3) of Sealing, suppress and carry out leakage test in conjunction with being in pipe inside in joint, process step in the outside sealing of being in the milk of pipe is characterized in that process step also comprises:
Step 1, at the omnidistance affixed rail bolster of sleeve pipe (2) inwall, on the rail bolster affixed two parallel and be in line and rail (5) that top mark is high consistent, two rails (5) becomes 60 ° of angles and perpendicular to sleeve pipe (2), rail (5) leans out sleeve pipe (2) two ends, the part that leans out sleeve pipe (2) is laid on two vertical shafts (1) work surface
Step 2, on rail (5), lay the carrying Prestressed concrete cylinder pipe (3) dolly (4), the angle of little (4) roller is consistent with rail (5) angle,
Step 3, Prestressed concrete cylinder pipe (3) adopted protective measure after; hang Prestressed concrete cylinder pipe (3) under in vertical shaft (1); and Prestressed concrete cylinder pipe (3) is placed on the dolly (4), drag dolly (4) afterwards to specified position
Lay jack (6) between the force bearing plate (8) that step 4, the supporting base (9) that sets in advance and Prestressed concrete cylinder pipe (3) both sides set in advance bottom sleeve pipe (2), and jack-up jack (6), regain dolly,
Step 5, below the Prestressed concrete cylinder pipe (3) of jack (6) jack-up, placing three-way adjustment device (7), rise three-way adjustment device (7) and make it to support Prestressed concrete cylinder pipe (3), utilize three-way adjustment device (7) Prestressed concrete cylinder pipe (3) accurately to be adjusted to design attitude at three-dimensional
After step 6, Prestressed concrete cylinder pipe (3) are adjusted to design attitude, affixed permanent billet between Prestressed concrete cylinder pipe (3) and sleeve pipe (2),
The operating method of step 7, repeating step 1～6 is installed next joint Prestressed concrete cylinder pipe (3), the preceding Sealing of placing in the junction of two joint Prestressed concrete cylinder pipe (3) butt joints,
Step 8, in the joint junction of two Prestressed concrete cylinder pipes (3) that install Sealing, suppress in Prestressed concrete cylinder pipe (3) inside and to carry out leakage test, the sealing of being in the milk in the outside of Prestressed concrete cylinder pipe (3),
The operating method of step 9, repetitive cycling step 1～6, step 8 one saves prestressed cylinder concrete pipe (3) in sleeve pipe (2) successively, finishes until engineering.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110195553 CN102261517B (en) | 2011-07-13 | 2011-07-13 | Method for mounting prestress steel cylinder concrete pipe in narrow space in sleeve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110195553 CN102261517B (en) | 2011-07-13 | 2011-07-13 | Method for mounting prestress steel cylinder concrete pipe in narrow space in sleeve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102261517A true CN102261517A (en) | 2011-11-30 |
| CN102261517B CN102261517B (en) | 2012-09-05 |
Family
ID=45008273
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201110195553 Expired - Fee Related CN102261517B (en) | 2011-07-13 | 2011-07-13 | Method for mounting prestress steel cylinder concrete pipe in narrow space in sleeve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102261517B (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103292035A (en) * | 2013-05-24 | 2013-09-11 | 中国华冶科工集团有限公司 | Construction method of underground pipe jacking |
| CN104154325A (en) * | 2014-06-23 | 2014-11-19 | 中交一航局第二工程有限公司 | Installation adjustment device and method for large-diameter pipeline roadbed crossing casing |
| CN105135055A (en) * | 2015-07-28 | 2015-12-09 | 上海市基础工程集团有限公司 | Movable pipe ejecting rail capable of rising and falling |
| CN105179807A (en) * | 2015-10-23 | 2015-12-23 | 中国水利水电第八工程局有限公司 | Moving device used for large steel pipe to penetrate through roadbed sleeve |
| CN108644470A (en) * | 2018-07-04 | 2018-10-12 | 中国二十冶集团有限公司 | A kind of construction method of interior conduit concrete bearing |
| CN109555902A (en) * | 2018-12-24 | 2019-04-02 | 裕腾建设集团有限公司 | A kind of installation method of pipeline |
| CN113700934A (en) * | 2021-08-28 | 2021-11-26 | 濮阳市水利勘测设计院 | Pipe jacking pipeline protection structure for rural water supply engineering |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201535392U (en) * | 2009-08-05 | 2010-07-28 | 叶香竹 | Top pipe slurry injection structure |
| CN201902692U (en) * | 2010-12-31 | 2011-07-20 | 天津万联管道工程有限公司 | Anti-subsidence jacking pipe |
| CN201902715U (en) * | 2010-12-31 | 2011-07-20 | 天津万联管道工程有限公司 | Liner column concrete pipe with prestressed pipe base |
-
2011
- 2011-07-13 CN CN 201110195553 patent/CN102261517B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201535392U (en) * | 2009-08-05 | 2010-07-28 | 叶香竹 | Top pipe slurry injection structure |
| CN201902692U (en) * | 2010-12-31 | 2011-07-20 | 天津万联管道工程有限公司 | Anti-subsidence jacking pipe |
| CN201902715U (en) * | 2010-12-31 | 2011-07-20 | 天津万联管道工程有限公司 | Liner column concrete pipe with prestressed pipe base |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103292035A (en) * | 2013-05-24 | 2013-09-11 | 中国华冶科工集团有限公司 | Construction method of underground pipe jacking |
| CN103292035B (en) * | 2013-05-24 | 2015-06-10 | 中国华冶科工集团有限公司 | Construction method of underground pipe jacking |
| CN104154325A (en) * | 2014-06-23 | 2014-11-19 | 中交一航局第二工程有限公司 | Installation adjustment device and method for large-diameter pipeline roadbed crossing casing |
| CN105135055A (en) * | 2015-07-28 | 2015-12-09 | 上海市基础工程集团有限公司 | Movable pipe ejecting rail capable of rising and falling |
| CN105179807A (en) * | 2015-10-23 | 2015-12-23 | 中国水利水电第八工程局有限公司 | Moving device used for large steel pipe to penetrate through roadbed sleeve |
| CN108644470A (en) * | 2018-07-04 | 2018-10-12 | 中国二十冶集团有限公司 | A kind of construction method of interior conduit concrete bearing |
| CN109555902A (en) * | 2018-12-24 | 2019-04-02 | 裕腾建设集团有限公司 | A kind of installation method of pipeline |
| CN109555902B (en) * | 2018-12-24 | 2020-08-18 | 裕腾建设集团有限公司 | Method for installing pipeline |
| CN113700934A (en) * | 2021-08-28 | 2021-11-26 | 濮阳市水利勘测设计院 | Pipe jacking pipeline protection structure for rural water supply engineering |
| CN113700934B (en) * | 2021-08-28 | 2023-02-28 | 濮阳市水利勘测设计院 | Pipe jacking pipeline protection structure for rural water supply engineering |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102261517B (en) | 2012-09-05 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102261517B (en) | Method for mounting prestress steel cylinder concrete pipe in narrow space in sleeve | |
| CN101929341B (en) | Construction method for TBM synchronization lining | |
| CN107460888B (en) | Mounting structure and method for concrete prefabricated pipe gallery | |
| CN106624639A (en) | Manufacturing and hoisting method for pre-spliced short joint of large valve and large-diameter pipeline | |
| CN106761785A (en) | A kind of subway tunnel shield originates construction technology | |
| CN105465481A (en) | Construction method for jacking structure of pipe jacking work well | |
| CN109342097B (en) | Shield tunnel comprehensive test platform and test method thereof | |
| CN205479706U (en) | Push pipe work jing ding advances structure | |
| CN204457802U (en) | Formed by integrally casting formula formwork jumbo | |
| CN110735969A (en) | tunnel penetrating steel pipe installation method and tunnel pulley arrangement structure | |
| CN114198107B (en) | Multifunctional reduced-scale shield model free of shield machine model and test method thereof | |
| CN104154325A (en) | Installation adjustment device and method for large-diameter pipeline roadbed crossing casing | |
| CN205209895U (en) | Shield tunnel lining segment is loading device for beam test | |
| CN205224120U (en) | Prevent osmosis membrane's laying device perpendicularly | |
| CN105605315A (en) | Three-joint pipe collar type J-lay system | |
| CN105757340B (en) | A kind of quick paving system of deep water J-type | |
| CN110029714A (en) | Engineering drainage pipeline mounting device | |
| CN204062146U (en) | Large-diameter pipeline passes through roadbed sleeve pipe installation adjusting device | |
| CN106088756A (en) | A kind of method of the cartridge type steel storage tank hydraulic pressure lift upside-down mounting based on BIM technology | |
| KR101071339B1 (en) | A water pipe line carrier devices for using of barge and set up of pipe line system | |
| CN205192869U (en) | Shield tunnel lining segment bending resistance test device | |
| CN111006067A (en) | Pipeline transportation and socket installation device in narrow space and use method thereof | |
| CN204941564U (en) | Subway tunnel narrow spacing leaves the right or normal track row gate-type lining cutting bench frame apparatus | |
| CN210890408U (en) | Tunnel wind water pipe freely removes support | |
| CN109538823B (en) | Construction method for double-pipe staggered alternative jacking |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120905 Termination date: 20150713 |
|
| EXPY | Termination of patent right or utility model |