CN110005354A - Multi-pipeline down tube method in vertical drilling - Google Patents
Multi-pipeline down tube method in vertical drilling Download PDFInfo
- Publication number
- CN110005354A CN110005354A CN201910293155.1A CN201910293155A CN110005354A CN 110005354 A CN110005354 A CN 110005354A CN 201910293155 A CN201910293155 A CN 201910293155A CN 110005354 A CN110005354 A CN 110005354A
- Authority
- CN
- China
- Prior art keywords
- pipeline
- section
- decentralization
- drilling
- elevator
- 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
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B19/00—Handling rods, casings, tubes or the like outside the borehole, e.g. in the derrick; Apparatus for feeding the rods or cables
- E21B19/02—Rod or cable suspensions
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B19/00—Handling rods, casings, tubes or the like outside the borehole, e.g. in the derrick; Apparatus for feeding the rods or cables
- E21B19/18—Connecting or disconnecting drill bit and drilling pipe
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B23/00—Apparatus for displacing, setting, locking, releasing, or removing tools, packers or the like in the boreholes or wells
- E21B23/01—Apparatus for displacing, setting, locking, releasing, or removing tools, packers or the like in the boreholes or wells for anchoring the tools or the like
Abstract
The invention discloses multi-pipeline down tube method, steps in a kind of vertical drilling are as follows: (A) need to transfer nozzle coordinate position one vertical drilling of construction of pipeline in decentralization path top middle section, and bottom hole and next middle section entry penetrate through；(B) prefabricated each pipeline section is successively transferred in the drilling in a manner of casing welding, after one pipeline of every decentralization, is fixed pipeline by stand apparatus, pipeline (7) bottom is abutted against by elbow with corresponding horizontal pipeline in perforation lane.This method is without operation in hole, and construction volume is small, short time limit, at low cost, ensure that operation safety, remarkable in economical benefits.
Description
Technical field
The method that the present invention relates to a kind of to carry out multi-pipeline down tube in vertical drilling.
Background technique
In Xincheng Gold Mine drainage underground, sludge drainage system transformation process, (the vertical depth between -630m to the middle section -380m is needed
250 meters) realize 6 draining, mud line connection, respectively two 377 × 12mm of Φ seamless steel pipes, two Φ 245 ×
12mm seamless steel pipe, two Φ 108 × 10mm seamless steel pipes calculate pipeline total weight at 80 tons or so by vertical range.
Solid pipe mode (calculating pipeline Bracket Type and spacing according to pipe weight) is installed using conventional, feasible ways have
Service shaft between interior shaft and middle section.It is proved through design, interior shaft shaft section is small, pit shaft interior conduit trammel lattice are small to expire
Sufficient pipeline installation requirements, service shaft terminates all to carry out closing backfill with back production between middle section, does not have pipeline mounting condition, and road
Line length reach 6 times hang down it is about 1500 meters high.Therefore, solid pipe mode is installed according to conventional, needs the path connection -630m that separately constructs
To the middle section -380m.
In the usual way, there are two types of specific solutions: first is that construction -380m extremely -630m cross-sectional area is not less than
The measure vertical shaft of 7.06 ㎡, to meet personnel's job requirements in measure vertical shaft, while installation supporting beam and bracket in service shaft,
Mounting and installation is carried out in the usual way, has a disadvantage in that measure shaft section area area is big, it is great in constructing amount, it is long in time limit, it is at high cost, and
Operational security is poor in well, and operation difficulty is big.Second is that 6 pipelines brills of being constructed respectively from -380m to -630m according to pipeline diameter
Hole, routinely drilling, down tube, solid pipe mode installation pipeline, have a disadvantage in that drilling is total and hang down up to 1500 meters, equally exist construction
Problem big, long in time limit and at high cost is measured, and higher in the decentralization of lesser aperture and fixed longer pipeline difficulty.
Summary of the invention
The invention proposes a kind of multi-pipeline down tube method in vertical drilling, the purpose is to: reduce drilling or sinking shaft construction
Project amount improves construction efficiency, reduces cost, reduces difficulty of construction.
Technical solution of the present invention is as follows:
A kind of multi-pipeline down tube method in vertical drilling, it is characterised in that step are as follows:
(A) nozzle coordinate position one vertical drilling of construction of pipeline need to be transferred in top middle section, bottom hole and next middle section are horizontal
Roadway linking；
(B) prefabricated pipeline section is successively transferred in the drilling in a manner of casing welding and connects into pipeline, every decentralization one
After pipeline, pipeline is fixed by stand apparatus, and is touched by elbow with corresponding horizontal pipeline in perforation lane in the bottom of the pipeline
It connects.
As the further improvement of this method, the detailed measure of the step (B) are as follows:
(B.1) derrick and the fixed parallel spandrel girder across in aperture are arranged at the aperture of top middle section, are installed on derrick
Device for hoisting；Start the fixed each pipeline of successively decentralization；
(B.2) for the pipeline currently transferred, take steel tube prefabricated at each pipeline section, sleeve is welded in one end of every pipeline section；
(B.3) near aperture, elevator is mounted on first segment pipeline section close to casing one end, using boom hoisting suspension hook and hang
Card slings first segment pipeline section, then transfers into drilling；
(B.4) when the elevator currently on decentralization pipeline section is reached at spandrel girder position, current elevator is supported using spandrel girder, is then taken off
The connection holded funeral rites between hook and the elevator slings next section pipeline section using suspension hook and another secondary elevator, and by next section pipeline section
The upper end of lower end and previous section pipeline section after positive socket to welding；Continue the decentralization of next section pipeline section；
(B.5) step (B.4) is repeated, until the upper end for forming the final section pipeline section of the pipeline is transferred at spandrel girder position；
(B.6) upper end of current decentralization pipeline is hung using suspension hook, the mobile pipeline is at borehole wall；Every pipeline point
Not Dui Ying one group of stand apparatus, the stand apparatus includes straight tube support and bend pipe support, and straight tube support is welded on pipeline
Bend pipe support is welded on the lower end of pipeline by upper end；
(B.7) the straight tube support of upper end is welded together with the spandrel girder；So far the decentralization and fixation of current pipeline are completed；
(B.8) step (B.2) to (B.7) is repeated, is completed until the decentralization of all pipelines is fixed.
As the further improvement of this method, device for measuring force is installed on the boom hoisting, for detecting current lifting
Weight；In the step (B.7), decentralization pipeline first makes the bottom of the pipeline be in contact with foot of hole, and then gradually decentralization is managed
Device for measuring force is observed while road, when the weight that boom hoisting is born is the 40% to 60% of pipeline total weight, stops decentralization,
The straight tube support of upper end is welded together with spandrel girder.
As the further improvement of this method, the boom hoisting includes the stable car for being mounted on top middle section, is mounted on
The fixed pulley group of crown, further includes the running block for being equipped with the suspension hook, and the running block is located at fixed pulley group
Lower section；Traction rope on the stable car bypasses the running block from top around the fixed pulley group, again from bottom, then last
End is fixedly connected with the derrick.
Further include step (C) as the further improvement of this method: after the decentralization of all pipelines, by foot of hole with
The section sealing between lane is penetrated through, to foot of hole delivering concrete until concrete height is beyond between bottom hole and perforation lane
Section；After concrete curing, fine sand is poured into hole from drilling orifice and carries out solid pipe.
Compared with the existing technology, the present invention has the positive effect that: (1) this method sufficiently combines drilling pipe-fixing and well
The advantages of cylinder inner lower tube installation, and the defect of the two is overcome, it need to only construct one and drill, and bore diameter is limited, be not necessarily to hole
Interior operation, construction volume is small, short time limit, at low cost, ensure that operation safety；(2) successively decentralization is each by the way of segmentation socket
Group pipeline, it is easy to operate；(3) boom hoisting, elevator and spandrel girder cooperate, and when casing welds, are temporarily held using spandrel girder
Take over the weight on road, therefore one group of boom hoisting only needed to can be completed down tube task, after the completion of pipeline decentralization, spandrel girder also into
One step is used as fixed pipeline, takes full advantage of middle section space and constructing device, dramatically saves cost；(4) pass through straight tube branch
Seat and bend pipe support fix the upper and lower ends of pipeline respectively, and straight tube support welds together with spandrel girder, and bend pipe support passes through mixed
Solidifying soil is fixed, can be too long to avoid pipeline and be bent；(5) when welding straight tube support, by gradually transferring, observing hoisting weight
Mode makes upper and lower side undertake the weight of pipeline half respectively, guarantees the firm of pipeline；(6) solid using fine sand filling in drilling
Pipe, high-efficient, at low cost, effect is good；(7) the movable and fixed pulley group in kiosk tubular derrick and boom hoisting is taken full advantage of, it is real
Suspension of the 30 tons of pipelines of single weight in the restricted clearance of underground is showed；(8) this method realizes 250 meters of depth, diameter for the first time
1.2m drills, and interior overall length is carrierless to transfer a plurality of draining, mud line, and valuable reference function is provided for successive projects, is enriched
The thinking of engineering design and programme planning.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of specific embodiment.
Specific embodiment
The technical solution that the invention will now be described in detail with reference to the accompanying drawings:
Such as Fig. 1, a kind of multi-pipeline down tube method in vertical drilling, step are as follows:
(A) vertical drilling of one aperture 1.2m of the anti-well drilling machine construction of LM-250, depth 250m, drilling are utilized in the middle section -380m
Bottom connects in the middle section -630m with gallery.
(B) pipeline 7 to be transferred successively is transferred in the drilling in a manner of casing welding between pipeline section respectively, under every
It is by stand apparatus that pipeline 7 is fixed after putting a pipeline 7, and pass through elbow and corresponding water in perforation lane in 7 bottom of pipeline
Flat pipeline is abutted against.
The detailed measure of step (B) are as follows:
(B.1) it in the kiosk tubular derrick 1 that the middle section -380m drilling orifice position mounting height is 11m, is installed on derrick 1
Device for hoisting.The boom hoisting includes 5 tons of stable cars 5 for being mounted on middle section, 50 tons of 4 fixed pulleys for being mounted on 1 top of derrick
Group 2, further includes 50 tons of 4 running blocks 3 for being equipped with the suspension hook 4, the running block 3 is located at the lower section of fixed pulley group 2；
6V × 30+FC- Φ 20-1870 wirerope on the stable car 5 bypasses institute from top around the fixed pulley group 2, again from bottom
Running block 3 is stated, then end is fixedly connected with the derrick 1.By calculating it is found that the maximum weight of single discharge pipe line is
27 tons, then maximum pull suffered by single-strand rope is 3.38t.Breaking force of rope is 242KN, calculate safety coefficient is
7.3, meet the requirement that safety coefficient is not less than 5.
Aperture also sets up 4 40b I-steel as spandrel girder 6.
Then start successively to transfer fixed each pipeline 7:
(B.2) it for the pipeline 7 currently transferred, takes 377 × 12mm of Φ seamless steel pipe to be segmented blanking according to length 6m, is used for
Several section pipeline sections of the pipeline 7 are formed, sleeve is respectively welded in one end of every section pipeline section.
(B.3) near drilling orifice, elevator is mounted on first segment pipeline section upper end, utilizes 4 He of suspension hook of boom hoisting
Elevator slings first segment pipeline section, then transfers into drilling.
(B.4) when the elevator currently on decentralization pipeline section is reached at 6 position of spandrel girder, current elevator is supported using spandrel girder 6,
Then the connection between suspension hook 4 and the elevator is disengaged, slings next section pipeline section using suspension hook 4 and another secondary elevator, and will be next
The casing of the lower end and previous section pipeline section upper end of saving pipeline section socket-connects and to positive welding；Then start the decentralization of next section pipeline section.
(B.5) step (B.4) is repeated, until the upper end for forming the final section pipeline section of the pipeline 7 transfers to spandrel girder 6
Set place.
When decentralization, it can also be solved using measure lantern ring of the oral area with certain taper in a plurality of 7 decentralization process of pipeline mutually
Scratch, card pipe the problem of.
(B.6) upper end of current decentralization pipeline 7 is hung using suspension hook 4, the mobile pipeline 7 is at borehole wall；Often
Pipeline 7 respectively corresponds one group of stand apparatus, and the stand apparatus includes straight tube support 10 and bend pipe support 11, by straight tube support
10 are welded on the upper end of pipeline 7, and bend pipe support 11 is welded on to the lower end of pipeline 7；It is fixed simultaneously using upper and lower side, it can prevent
The bending in drilling of pipeline 7.
(B.7) the straight tube support 10 of upper end and the spandrel girder 6 are welded together；So far it completes under current pipeline 7
It puts and fixes.
Preferably, device for measuring force is installed on the boom hoisting, for detecting the weight currently lifted by crane；The device for measuring force
The dynamometer that can be mounted at suspension hook 4.When welding straight tube support 10, decentralization pipeline 7 makes 7 bottom of pipeline and drilling bottom first
Portion is in contact, and observes device for measuring force while then gradually transferring pipeline 7, when the weight that boom hoisting is born is that pipeline 7 is total
Weight 40% to 60% when, stop decentralization, the straight tube support 10 of upper end is welded together with spandrel girder 6, distinguishes upper and lower side
The approximately half of weight of pipeline 7 is undertaken, guarantees the firm of pipeline 7.
(B.8) step (B.2) to (B.7) is repeated, is completed until the decentralization of all pipelines 7 is fixed.
(C) after all pipelines 7 are transferred, the section between foot of hole and perforation lane is sealed using steel plate, anchor pole etc.
It closes, using delivery pump to foot of hole delivering concrete 9 until 9 height of concrete is beyond bottom hole and penetrates through the section between lane；
After concrete 9 solidifies, fine sand 8 is poured into hole from drilling orifice and carries out solid pipe.
So far pipe construction is descended to complete.
Currently, -630m creates the discharge pipe line that central pump house has passed through in drilling, and it is more than half a year to carry out draining, drain
Period pipeline is stable, without friction.
In terms of economic benefit, this method drills using one aperture 1.2m of anti-well drilling machine construction, depth 250m and installs 6
Discharge pipe line, 4500 yuan/m of unit price, expense are total are as follows: 4500 × 250=112.5 ten thousand yuan.Also, it is set according to drainage system planning
Meter, will be transformed in the progress of the second half year in 2019-930m drainage system, and discharge pipe line uses this method, be built using former interior shaft
Period ventilation drainage sump (diameter is 1.2m measure vertical shaft between -630m to -930m, has been discarded) is used as installation path,
4500 yuan/m × 300m=1,350,000 yuan can be saved money.The innovation of the pipeline technique can reduce investment outlay 247.5 for Xincheng Gold Mine
Wan Yuan.
Claims (5)
1. a kind of multi-pipeline down tube method in vertical drilling, it is characterised in that step are as follows:
(A) nozzle coordinate position one vertical drilling of construction of pipeline need to be transferred in top middle section, bottom hole and next middle section are horizontal
Roadway linking；
(B) prefabricated pipeline section is successively transferred in the drilling in a manner of casing welding and is connected into pipeline (7), every decentralization one
It is by stand apparatus that pipeline (7) are fixed after pipeline (7), and pipeline (7) bottom by elbow with penetrate through it is corresponding in lane
Horizontal pipeline is abutted against.
2. multi-pipeline down tube method in vertical drilling as described in claim 1, it is characterised in that the step (B) is arranged in detail
It applies are as follows:
(B.1) derrick (1) and the fixed parallel spandrel girder (6) across in aperture are arranged at the aperture of top middle section, in derrick (1)
Upper installation boom hoisting；Start the fixed each pipeline (7) of successively decentralization；
(B.2) for the pipeline (7) currently transferred, take steel tube prefabricated at each pipeline section, sleeve is welded in one end of every pipeline section；
(B.3) near aperture, elevator is mounted on first segment pipeline section close to casing one end, utilizes the suspension hook (4) of boom hoisting
First segment pipeline section is sling with elevator, is then transferred into drilling；
(B.4) when the elevator currently on decentralization pipeline section is reached at spandrel girder (6) position, current elevator is supported using spandrel girder (6),
Then the connection between suspension hook (4) and the elevator is disengaged, slings next section pipeline section using suspension hook (4) and another secondary elevator, and will
The upper end of the lower end of next section pipeline section and previous section pipeline section after positive socket to welding；Continue the decentralization of next section pipeline section；
(B.5) step (B.4) is repeated, until spandrel girder (6) position is transferred in the upper end for forming the final section pipeline section of the pipeline (7)
Set place；
(B.6) upper end of current decentralization pipeline (7) is hung using suspension hook (4), the mobile pipeline (7) is at borehole wall；
Every pipeline (7) respectively corresponds one group of stand apparatus, and the stand apparatus includes straight tube support (10) and bend pipe support (11), incites somebody to action
Straight tube support (10) is welded on the upper end of pipeline (7), and bend pipe support (11) is welded on to the lower end of pipeline (7)；
(B.7) the straight tube support (10) of upper end is welded together with the spandrel girder (6)；So far current pipeline (7) is completed
It transfers and fixed；
(B.8) step (B.2) to (B.7) is repeated, is completed until all pipelines (7) decentralization is fixed.
3. multi-pipeline down tube method in vertical drilling as claimed in claim 2, it is characterised in that: installed on the boom hoisting
There is device for measuring force, for detecting the weight currently lifted by crane；In the step (B.7), decentralization pipeline (7) makes pipeline (7) bottom first
Portion is in contact with foot of hole, device for measuring force is observed while then gradually transferring pipeline (7), when the weight that boom hoisting is born
When amount is the 40% to 60% of pipeline (7) total weight, stops decentralization, the straight tube support (10) of upper end is welded on spandrel girder (6)
Together.
4. multi-pipeline down tube method in vertical drilling as claimed in claim 2, it is characterised in that: the boom hoisting includes peace
Stable car (5), the fixed pulley group (2) that is mounted at the top of derrick (1) mounted in top middle section, further include being equipped with the suspension hook
(4) running block (3), the running block (3) are located at the lower section of fixed pulley group (2)；Traction rope on the stable car (5) from
Top bypasses the running block (3) around the fixed pulley group (2), again from bottom, and then end and the derrick (1) are fixed
Connection.
5. multi-pipeline down tube method in vertical drilling as described in claim 1, it is characterised in that further include step (C): all
It is straight to foot of hole delivering concrete (9) by the section sealing between foot of hole and perforation lane after pipeline (7) is transferred
Highly beyond bottom hole and the section between lane is penetrated through to concrete (9)；After concrete (9) solidification, poured from drilling orifice into hole
It fills fine sand (8) and carries out solid pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910293155.1A CN110005354B (en) | 2019-04-12 | 2019-04-12 | Method for lowering pipes in vertical drilling holes through multiple pipelines |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910293155.1A CN110005354B (en) | 2019-04-12 | 2019-04-12 | Method for lowering pipes in vertical drilling holes through multiple pipelines |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110005354A true CN110005354A (en) | 2019-07-12 |
| CN110005354B CN110005354B (en) | 2021-06-22 |
Family
ID=67171458
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910293155.1A Active CN110005354B (en) | 2019-04-12 | 2019-04-12 | Method for lowering pipes in vertical drilling holes through multiple pipelines |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110005354B (en) |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2239500Y (en) * | 1995-07-19 | 1996-11-06 | 高志伟 | Well pipe placing machine |
| CN202073568U (en) * | 2011-03-03 | 2011-12-14 | 中煤第七十一工程处 | Vertical shaft pipeline fixing device |
| CN102535490A (en) * | 2012-03-06 | 2012-07-04 | 北京交通大学 | Method for dewatering foundation pit by using bored cast-in-place pile |
| CN103274325A (en) * | 2013-06-06 | 2013-09-04 | 枣庄矿业集团中兴建安工程有限公司 | Portable jack |
| CN204960939U (en) * | 2015-07-24 | 2016-01-13 | 金川集团股份有限公司 | A pipeline fixing base for mine shaft |
| US20180106111A1 (en) * | 2015-03-24 | 2018-04-19 | Cameron International Corporation | Seabed drilling system |
| CN108506568A (en) * | 2018-06-27 | 2018-09-07 | 西安西电开关电气有限公司 | The draft gear and traction method of pipeline are lifted in vertical shaft |
| CN108590738A (en) * | 2018-03-01 | 2018-09-28 | 王宇曜 | Down-hole gas sucking releasing shaft construction method |
| CN108626482A (en) * | 2018-04-23 | 2018-10-09 | 西山煤电建筑工程集团有限公司矿建第分公司 | The construction method of vertical gas pipe is installed using anti-well drilling machine |
| CN208603620U (en) * | 2018-08-07 | 2019-03-15 | 中国水利水电第十四工程局有限公司 | A kind of positive well excavation steady rope device of cage of vertical shaft |
-
2019
- 2019-04-12 CN CN201910293155.1A patent/CN110005354B/en active Active
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2239500Y (en) * | 1995-07-19 | 1996-11-06 | 高志伟 | Well pipe placing machine |
| CN202073568U (en) * | 2011-03-03 | 2011-12-14 | 中煤第七十一工程处 | Vertical shaft pipeline fixing device |
| CN102535490A (en) * | 2012-03-06 | 2012-07-04 | 北京交通大学 | Method for dewatering foundation pit by using bored cast-in-place pile |
| CN103274325A (en) * | 2013-06-06 | 2013-09-04 | 枣庄矿业集团中兴建安工程有限公司 | Portable jack |
| US20180106111A1 (en) * | 2015-03-24 | 2018-04-19 | Cameron International Corporation | Seabed drilling system |
| CN204960939U (en) * | 2015-07-24 | 2016-01-13 | 金川集团股份有限公司 | A pipeline fixing base for mine shaft |
| CN108590738A (en) * | 2018-03-01 | 2018-09-28 | 王宇曜 | Down-hole gas sucking releasing shaft construction method |
| CN108626482A (en) * | 2018-04-23 | 2018-10-09 | 西山煤电建筑工程集团有限公司矿建第分公司 | The construction method of vertical gas pipe is installed using anti-well drilling machine |
| CN108506568A (en) * | 2018-06-27 | 2018-09-07 | 西安西电开关电气有限公司 | The draft gear and traction method of pipeline are lifted in vertical shaft |
| CN208603620U (en) * | 2018-08-07 | 2019-03-15 | 中国水利水电第十四工程局有限公司 | A kind of positive well excavation steady rope device of cage of vertical shaft |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110005354B (en) | 2021-06-22 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108412505A (en) | Jacking construction structure and pipe jacking construction method | |
| CN105926669B (en) | A kind of Construction Method of Metro Station | |
| CN104963301B (en) | The dilatory translation downward putting device and method removed for pier top beam section and bridge pier | |
| CN107339111B (en) | The floating construction method of installation of more PE pipes in large-scale push pipe | |
| CN108278034B (en) | Difficult location electric pole replaces construction method | |
| CN103899335B (en) | Synchronize tunneling operation system and the method for inverted arch synchronization lining | |
| CN104234079B (en) | A kind of subway station Y type cast steel combines steel pipe column construction method | |
| CN206942764U (en) | The supplementary structure of assembly and disassembly shield machine or TBM development machines in a kind of hole | |
| CN103123016B (en) | Construction method for laying gas pipelines along bridge | |
| CN108678752B (en) | Shaft equipment rapid installation process | |
| CN101705687B (en) | Deep foundation pit reinforced concrete waist rail detaching device and construction method | |
| CN105178968B (en) | Rock tunnel(ling) machine pushing tow support meanss and construction method | |
| CN101302760A (en) | Ultralong overweight concrete filling pile reinforcement type reinforcing steel bar caging | |
| CN111810180B (en) | Construction method for ultra-large-diameter earth pressure balance jacking pipe to penetrate through expressway | |
| CN107227686A (en) | A kind of tunnel-type anchorage pre-stress system locating support construction method | |
| CN102733608B (en) | Construction method for spray head layer of granulation tower | |
| CN208184738U (en) | jacking construction structure | |
| CN103174131A (en) | Underground engineering guiding-cavity-excavating small-diameter pile construction complete equipment system | |
| CN109026032B (en) | Lower shield translation construction method for limit invasion of downward-turning beam | |
| CN205417623U (en) | Machine is transported to long step material | |
| CN203684060U (en) | Temporary steel-frame bridge | |
| CN102747725B (en) | Bored pile construction method with tiny disturbance | |
| CN110005354A (en) | Multi-pipeline down tube method in vertical drilling | |
| CN107288640B (en) | A kind of nothing is surely restricted self-supporting modularization vertical shaft driving and masonry construction device | |
| CN208105272U (en) | One kind preventing superfilled device |
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 |