CN112324231A - Construction method for ultrahigh chimney lining layer - Google Patents
Construction method for ultrahigh chimney lining layer Download PDFInfo
- Publication number
- CN112324231A CN112324231A CN202011170666.3A CN202011170666A CN112324231A CN 112324231 A CN112324231 A CN 112324231A CN 202011170666 A CN202011170666 A CN 202011170666A CN 112324231 A CN112324231 A CN 112324231A
- Authority
- CN
- China
- Prior art keywords
- chimney
- construction method
- ultrahigh
- lining
- platform
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000010276 construction Methods 0.000 title claims abstract description 82
- 238000000034 method Methods 0.000 claims abstract description 8
- 239000011449 brick Substances 0.000 claims description 40
- 239000004570 mortar (masonry) Substances 0.000 claims description 12
- 239000002253 acid Substances 0.000 claims description 8
- 239000000463 material Substances 0.000 claims description 6
- 239000000725 suspension Substances 0.000 claims description 6
- 238000009413 insulation Methods 0.000 claims description 4
- 239000003973 paint Substances 0.000 claims description 4
- 229910000831 Steel Inorganic materials 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000011150 reinforced concrete Substances 0.000 description 1
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
- E04H12/00—Towers; Masts or poles; Chimney stacks; Water-towers; Methods of erecting such structures
- E04H12/28—Chimney stacks, e.g. free-standing, or similar ducts
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04F—FINISHING WORK ON BUILDINGS, e.g. STAIRS, FLOORS
- E04F13/00—Coverings or linings, e.g. for walls or ceilings
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G11/00—Forms, shutterings, or falsework for making walls, floors, ceilings, or roofs
- E04G11/06—Forms, shutterings, or falsework for making walls, floors, ceilings, or roofs for walls, e.g. curved end panels for wall shutterings; filler elements for wall shutterings; shutterings for vertical ducts
- E04G11/20—Movable forms; Movable forms for moulding cylindrical, conical or hyperbolical structures; Templates serving as forms for positioning blocks or the like
- E04G11/22—Sliding forms raised continuously or step-by-step and being in contact with the poured concrete during raising and which are not anchored in the hardened concrete; Arrangements of lifting means therefor
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G3/00—Scaffolds essentially supported by building constructions, e.g. adjustable in height
- E04G3/28—Mobile scaffolds; Scaffolds with mobile platforms
- E04G3/30—Mobile scaffolds; Scaffolds with mobile platforms suspended by flexible supporting elements, e.g. cables
Landscapes
- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Mechanical Engineering (AREA)
- Working Measures On Existing Buildindgs (AREA)
Abstract
The invention discloses a construction method, in particular discloses a construction method for an inner liner of an ultrahigh chimney, and belongs to the technical field of construction processes of ultrahigh barrel buildings. The construction method for the ultrahigh chimney liner is remarkably improved in construction efficiency and capable of adapting to narrow construction operation environments in the chimney. The construction method is based on a hydraulic sliding form system which is lifted to the top, an annular operation platform which is liftable in height and adjustable in outer diameter is additionally arranged on the hydraulic sliding form system, then the annular operation platform is used as a construction operation platform, and the lining is built on the inner side wall surface of the ultrahigh chimney section by section from bottom to top until the building work of the whole lining layer of the ultrahigh chimney is completed.
Description
Technical Field
The invention relates to a construction method, in particular to a construction method for an inner liner of an ultrahigh chimney, and belongs to the technical field of construction processes of ultrahigh barrel buildings.
Background
The lining of the chimney with the reinforced concrete structure usually consists of refractory bricks, acid-resistant daub and acid-resistant anticorrosive paint, and because the lining is constructed in the chimney, the construction space is narrow and small, the high-altitude operation is more, the material is difficult to hoist, and the construction speed is slow. The technical problem which needs to be solved urgently by technical personnel in the field is to find a construction method which can improve the construction efficiency and adapt to the narrow construction operation environment in the chimney.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: the construction method for the ultrahigh chimney liner is remarkably improved in construction efficiency and capable of adapting to narrow construction operation environments in the chimney.
The technical scheme adopted for solving the technical problems is as follows: a construction method for an inner liner of an ultrahigh chimney is characterized in that a hydraulic sliding form system which is lifted to the top is used as a basis, an annular operating platform which is liftable in height and adjustable in outer diameter is additionally arranged on the construction method, and then the annular operating platform is used as a construction operating platform, and the inner liner is built on the inner side wall surface of the ultrahigh chimney section by section from bottom to top until the building work of the inner liner of the ultrahigh chimney is completed.
Furthermore, the annular operating platform comprises an annular base platform and a telescopic additional platform, and the telescopic additional platform is arranged on the annular base platform in a radially telescopic mode.
In a preferred mode of the above scheme, the annular operating platform further comprises at least three groups of lifting sling groups, the upper ends of the lifting sling groups are respectively connected with the hydraulic slip form system, the lower ends of the lifting sling groups are respectively connected with the annular foundation platform, and in the process of building the inner liner of the chimney, the annular operating platform raises and lowers the height of the lifting sling groups by retracting the lifting sling of the lifting sling groups according to requirements.
Furthermore, the lifting sling group also comprises a chain block, and the chain block is connected in series with the sling of the corresponding lifting sling group.
The preferable mode of the scheme is that when the inner lining layer of the chimney is built in a segmented mode, lining materials are conveyed to the annular operating platform from the hole in the inner side of the annular operating platform through a suspension cage of the hydraulic sliding mode system.
Further, the inner liner of the ultrahigh chimney sequentially comprises refractory bricks, acid-resistant daub and acid-resistant anticorrosive paint from inside to outside, and the construction sequence is,
when the thickness of the lining is 1 brick, a top brick is used for building so as to prevent brick scraps and mortar from falling into the heat insulation layer; when the thickness of the lining is 1/2 brick, the lining is built by using the sequential bricks, and the special-shaped bricks are staggered by 1/2 of the width of the special-shaped bricks; when the radian is small, the brick needs to be processed, and a circle of anti-sinking belts are arranged at intervals according to the design;
the masonry should be built in layers, straight twisting is not allowed to be allowed, mortar in the masonry body must be full, and the fullness of the mortar is not lower than 90%.
The preferable mode of the scheme is that a closable guardrail extending along the circumferential direction is arranged at the position, close to the inner side, of the hole of the annular base platform.
The invention has the beneficial effects that: the construction method is based on the existing hydraulic slip form system which is lifted to the top, then an annular operation platform which is liftable in height and adjustable in outer diameter is additionally arranged on the hydraulic slip form system, and finally the annular operation platform is used as a construction operation platform, and a lining is built on the inner side wall surface of the ultrahigh chimney section by section from bottom to top until the building work of the whole lining layer of the ultrahigh chimney is completed. Like this, not only solved among the prior art the chimney construction lining layer in the narrow and small technical problem in operation space, owing to relied on current hydraulic pressure slipform system to and increase the annular operation platform that highly liftable, the external diameter of setting are adjustable, can also effectual improvement efficiency of construction, guarantee the quality of construction moreover.
Drawings
FIG. 1 is a construction schematic diagram related to the construction method for the ultrahigh chimney liner layer.
Labeled as: the device comprises a hydraulic sliding form system 1, an annular operating platform 2, an ultrahigh chimney 3, a lifting sling group 4, a sling 5, a chain block 6, a suspension cage 7 and an ultrahigh chimney liner layer 8.
Detailed Description
As shown in figure 1, the construction method for the ultrahigh chimney liner provided by the invention has the advantages that the construction efficiency is obviously improved, and the construction method can adapt to a narrow construction operation environment in a chimney. The construction method is based on a hydraulic sliding form system 1 which is lifted to the top, an annular operating platform 2 which is liftable in height and adjustable in outer diameter is additionally arranged on the hydraulic sliding form system, then the annular operating platform 2 is used as a construction operating platform, and a lining is built on the inner side wall surface of the ultrahigh chimney 3 section by section from bottom to top until the building work of the whole ultrahigh chimney lining layer is completed. The construction method is based on the existing hydraulic slip form system which is lifted to the top, then an annular operation platform which is liftable in height and adjustable in outer diameter is additionally arranged on the hydraulic slip form system, and finally the annular operation platform is used as a construction operation platform, and a lining is built on the inner side wall surface of the ultrahigh chimney section by section from bottom to top until the building work of the whole lining layer of the ultrahigh chimney is completed. Like this, not only solved among the prior art the chimney construction lining layer in the narrow and small technical problem in operation space, owing to relied on current hydraulic pressure slipform system to and increase the annular operation platform that highly liftable, the external diameter of setting are adjustable, can also effectual improvement efficiency of construction, guarantee the quality of construction moreover.
In the implementation method, in order to adapt to the structural characteristics that the ultrahigh chimney is tapered along the vertical direction, the annular operating platform 2 is arranged into a structure comprising an annular base platform and a telescopic additional platform, and the telescopic additional platform is arranged on the annular base platform in a telescopic manner along the radial direction. Thus, along with the construction from bottom to top, the distance between the outermost side of the annular operating platform 2 and the inner wall of the chimney can be always ensured. Simultaneously, in order to guarantee the stability in the work progress to and the security of construction, annular operation platform 2 still include three at least lifting sling group 4 of group, each lifting sling group 4's of group upper end is connected with hydraulic pressure slipform system 1 respectively, each lifting sling group 4's of group lower extreme is connected with annular basic platform respectively, builds the in-process of chimney inner liner by laying bricks or stones, annular operation platform 2 as required through receive and release each lifting sling group 4's 5 lifting height of lifting sling group. Of course, for effectively lifting the operation platform, the lifting sling set 4 further includes a chain block 6, and the chain block 6 is connected in series with the sling 5 of the corresponding lifting sling set 4.
Meanwhile, in order to reduce the construction cost to the maximum extent and depend on more equipment remained in the chimney construction, when the inner lining layer of the chimney is built in a segmented mode, lining materials are conveyed to the annular operating platform 2 from the hole in the inner side of the annular operating platform 2 through the suspension cage 7 of the hydraulic sliding mode system 1. Of course, in order to ensure safety during operation, a closable guardrail extending in the circumferential direction is arranged at the hole of the annular base platform close to the inner side. . At the moment, the lining layer 8 of the ultrahigh chimney sequentially comprises refractory bricks, acid-resistant daub and acid-resistant anticorrosive paint from inside to outside, and the construction sequence is that when the lining thickness is 1 brick, a top brick is applied for masonry so as to prevent brick scraps and mortar from falling into the heat insulation layer; when the thickness of the lining is 1/2 brick, the lining is built by using the sequential bricks, and the special-shaped bricks are staggered by 1/2 of the width of the special-shaped bricks; when the radian is small, the brick needs to be processed, and a circle of anti-sinking belts are arranged at intervals according to the design; the masonry should be built in layers, straight twisting is not allowed to be allowed, mortar in the masonry body must be full, and the fullness of the mortar is not lower than 90%.
In conclusion, the construction method provided by the application for building the inner liner for the ultrahigh chimney has the following advantages,
a transportation derrick and a construction platform are erected by utilizing a hydraulic slip form system, so that the transportation derrick and the construction platform are attached to the slip form system to lift along with the slip form system, and construction is carried out by adopting a construction method from bottom to top, so that the safety of constructors is ensured, the transportation problem of lining materials is solved by utilizing the transportation derrick and the suspension cage for barrel wall construction, the construction cost is fully saved, and the construction efficiency is improved by over 50 percent.
DETAILED DESCRIPTION OF EMBODIMENT (S) OF INVENTION
The construction method is used for construction by adopting a suspended lining construction operation platform. The design is and make inside lining operation platform bottom the chimney, and this inside lining operation platform can carry out diameter adjustment or flexible along with the change of chimney internal diameter, is provided with the hole that supplies the cage to pass through in the middle of this inside lining operation platform, and the wooden springboard is paved on the platform, is provided with railing and safety net all around.
By adopting the method, the transportation derrick for construction of the cylinder wall is fully utilized, and the lining construction operation platform is suspended on the transportation derrick, so that the erection of scaffolds can be reduced, the operation space is maximized, the safety of constructors can be ensured, the construction cost is fully saved, and the construction efficiency is improved.
8 groups of steel wire ropes and 8 groups of 5t hand plate hoists are adopted to suspend and lift the lining construction operation platform.
The construction method is characterized in that the construction method of 'external sliding and internal building' is adopted, wherein the construction method comprises the steps of sliding the outer cylinder wall, building the lining and synchronously constructing the outer cylinder wall and the lining.
Building lining bricks: when the lining is thick 1 brick, a top brick is used for building (side bricks), and brick scraps and mortar are prevented from falling into the heat insulation layer; when the lining is thick 1/2 brick, the brick is built by using the brick-lining (strip brick), the special-shaped brick is required to stagger 1/2 of the width of the special-shaped brick, the brick is required to be processed when the radian is small, and a circle of anti-sinking belt is arranged at intervals according to the design. The masonry should be built in layers, straight twisting is not allowed to be allowed, mortar in the masonry body must be full, and the fullness of the mortar is not lower than 90%.
Example one
The method comprises the following operation steps:
1. and calculating the bearing capacity of the construction lifting derrick.
2. The design is and make inside lining operation platform bottom the chimney, and this inside lining operation platform can carry out diameter adjustment or flexible along with the change of chimney internal diameter, is provided with the hole that supplies the cage to pass through in the middle of this inside lining operation platform, and the wooden springboard is paved on the platform, is provided with railing and safety net all around.
3. 8 groups of steel wires □ are fixed on the transportation derrick at the top, a steel wire rope is threaded, and 3-5t lever blocks are installed, wherein the number of the lever blocks is 8.
4. And lifting the lining operation platform to the construction height through the chain block.
5. The materials are conveyed to the operation platform through the suspension cage for construction.
6. The construction method is characterized in that the construction method of 'external sliding and internal building' is adopted, wherein the construction method comprises the steps of sliding the outer cylinder wall, building the lining and synchronously constructing the outer cylinder wall and the lining.
7. And circularly lifting the liner to be constructed into a lower ring liner after one ring is constructed until the liner is completely constructed.
Claims (7)
1. A construction method for an ultrahigh chimney liner is characterized by comprising the following steps: the construction method is based on a hydraulic sliding form system (1) which is lifted to the top, an annular operating platform (2) which is liftable in height and adjustable in outer diameter is additionally arranged on the hydraulic sliding form system, then the annular operating platform (2) is used as a construction operating platform, and a lining is built on the inner side wall surface of the ultrahigh chimney (3) section by section from bottom to top until the building work of the whole ultrahigh chimney lining layer is completed.
2. The construction method for an ultra-high chimney liner according to claim 1, characterized in that: the annular operating platform (2) comprises an annular base platform and a telescopic additional platform, and the telescopic additional platform is arranged on the annular base platform in a telescopic mode along the radial direction.
3. The construction method for an ultra-high chimney liner according to claim 2, characterized in that: the annular operation platform (2) further comprises at least three groups of lifting sling groups (4), the upper ends of the lifting sling groups (4) are respectively connected with the hydraulic slip form system (1), the lower ends of the lifting sling groups (4) are respectively connected with the annular base platform, and in the process of building the inner liner of the chimney, the annular operation platform (2) can lift the height through the lifting ropes (5) for retracting the lifting sling groups (4) according to needs.
4. The construction method for an ultra-high chimney liner according to claim 3, characterized in that: the lifting sling group (4) further comprises a chain block (6), and the chain block (6) is connected in series with the sling (5) of the corresponding lifting sling group (4).
5. The construction method for the ultrahigh chimney liner according to any one of claims 1 to 4, characterized by comprising the following steps: when the inner lining layer of the chimney is built in sections, lining materials are conveyed to the annular operating platform (2) from a hole on the inner side of the annular operating platform (2) through a suspension cage (7) of the hydraulic sliding mode system (1).
6. The construction method for an ultra-high chimney liner according to claim 5, characterized in that: the ultrahigh chimney lining layer (8) comprises refractory bricks, acid-resistant daub and acid-resistant anticorrosive paint from inside to outside in sequence,
when the thickness of the lining is 1 brick, a top brick is used for building so as to prevent brick scraps and mortar from falling into the heat insulation layer; when the thickness of the lining is 1/2 brick, the lining is built by using the sequential bricks, and the special-shaped bricks are staggered by 1/2 of the width of the special-shaped bricks; when the radian is small, the brick needs to be processed, and a circle of anti-sinking belts are arranged at intervals according to the design;
the masonry should be built in layers, straight twisting is not allowed to be allowed, mortar in the masonry body must be full, and the fullness of the mortar is not lower than 90%.
7. The construction method for an ultra-high chimney liner according to claim 5, characterized in that: a closable guardrail extending along the circumferential direction is arranged at the hole part of the annular base table close to the inner side.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011170666.3A CN112324231A (en) | 2020-10-28 | 2020-10-28 | Construction method for ultrahigh chimney lining layer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011170666.3A CN112324231A (en) | 2020-10-28 | 2020-10-28 | Construction method for ultrahigh chimney lining layer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112324231A true CN112324231A (en) | 2021-02-05 |
Family
ID=74296152
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011170666.3A Pending CN112324231A (en) | 2020-10-28 | 2020-10-28 | Construction method for ultrahigh chimney lining layer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112324231A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113123585A (en) * | 2021-03-23 | 2021-07-16 | 宁夏大学 | Construction equipment and construction method for glass fiber reinforced plastic chimney lining |
| CN113944363A (en) * | 2021-09-10 | 2022-01-18 | 中国化学工程第十三建设有限公司 | Ultrahigh chimney barrel and liner synchronous construction platform and method |
| CN115306151A (en) * | 2022-08-02 | 2022-11-08 | 中国一冶集团有限公司 | System for lining pipeline bricklaying and construction method |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4172564B2 (en) * | 1999-10-12 | 2008-10-29 | 大成建設株式会社 | How to build tower structures |
| CN102535843A (en) * | 2011-12-16 | 2012-07-04 | 马鞍山钢铁建设集团有限公司 | Construction method of circular reinforced concrete chimney cylinder wall and hydraulic sliding mould device |
| CN207553590U (en) * | 2017-09-11 | 2018-06-29 | 上海二十冶建设有限公司 | A kind of novel Double tabletop sliding formwork system |
| CN110685433A (en) * | 2019-10-17 | 2020-01-14 | 鞍山三冶建筑工程有限公司 | Chimney construction device and construction method applying hydraulic lifting and rollover technology |
| CN111622485A (en) * | 2020-06-03 | 2020-09-04 | 中冶天工集团有限公司 | Chimney lining masonry construction operation platform and construction method thereof |
-
2020
- 2020-10-28 CN CN202011170666.3A patent/CN112324231A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4172564B2 (en) * | 1999-10-12 | 2008-10-29 | 大成建設株式会社 | How to build tower structures |
| CN102535843A (en) * | 2011-12-16 | 2012-07-04 | 马鞍山钢铁建设集团有限公司 | Construction method of circular reinforced concrete chimney cylinder wall and hydraulic sliding mould device |
| CN207553590U (en) * | 2017-09-11 | 2018-06-29 | 上海二十冶建设有限公司 | A kind of novel Double tabletop sliding formwork system |
| CN110685433A (en) * | 2019-10-17 | 2020-01-14 | 鞍山三冶建筑工程有限公司 | Chimney construction device and construction method applying hydraulic lifting and rollover technology |
| CN111622485A (en) * | 2020-06-03 | 2020-09-04 | 中冶天工集团有限公司 | Chimney lining masonry construction operation platform and construction method thereof |
Non-Patent Citations (1)
| Title |
|---|
| 张福常: "华能上安电厂一期210／7m烟囱内衬施工 ", 《电力建设》 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113123585A (en) * | 2021-03-23 | 2021-07-16 | 宁夏大学 | Construction equipment and construction method for glass fiber reinforced plastic chimney lining |
| CN113123585B (en) * | 2021-03-23 | 2022-11-22 | 宁夏大学 | Construction equipment and construction method for glass fiber reinforced plastic chimney lining |
| CN113944363A (en) * | 2021-09-10 | 2022-01-18 | 中国化学工程第十三建设有限公司 | Ultrahigh chimney barrel and liner synchronous construction platform and method |
| CN115306151A (en) * | 2022-08-02 | 2022-11-08 | 中国一冶集团有限公司 | System for lining pipeline bricklaying and construction method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN112324231A (en) | Construction method for ultrahigh chimney lining layer | |
| CN108019076B (en) | Construction method of large-diameter reinforced concrete silo and device for conical shell construction | |
| CN201411900Y (en) | Hydraulic die lifter for chimneys | |
| CN202467191U (en) | Hydraulic slip form device used for construction of circular reinforced concrete chimney wall | |
| CN101225708A (en) | Method for mounting up-sliding bottom-brick-building derrick-free hydraulic sliding formwork of chimney | |
| CN110685433A (en) | Chimney construction device and construction method applying hydraulic lifting and rollover technology | |
| CN207513158U (en) | Concrete stack shell constructing device | |
| CN101566005B (en) | Chimney hydraulic mould lifting device | |
| CN107795122A (en) | Concrete stack shell constructing device and construction method | |
| CN211286601U (en) | Chimney construction device applying hydraulic lifting and rollover technology | |
| CN203654702U (en) | Operating platform for construction of reinforced concrete chimney | |
| CN102444310A (en) | Method for constructing concrete chimney cylinder body through formwork lifting process | |
| CN206859698U (en) | A kind of high-rise building air conditioner water vertical shaft Large Diameter Pipeline standpipe inverted construction facility | |
| CN109055637B (en) | Hydraulic lifting process for mounting furnace shell in blast furnace overhaul | |
| CN114109123A (en) | Construction method of chimney barrel body | |
| RU2476653C1 (en) | Method of erecting high-rise reinforced concrete structures, for example, industrial chimney-stacks and towers | |
| CN109339399B (en) | Sectional construction method of steel structure in elevator hoistway | |
| CN107288640B (en) | A kind of nothing is surely restricted self-supporting modularization vertical shaft driving and masonry construction device | |
| CN218434629U (en) | Lifting frame for tower type pier construction | |
| CN111485045A (en) | Method for building bottom bricks in blast furnace maintenance | |
| CN101225741B (en) | Method for building whole borehole shrunkin underground gas-storing well | |
| CN205591926U (en) | Do not have self -supporting modularization shaft of surely restricting and dig step construction equipment | |
| CN115095153A (en) | Concrete chimney construction method without internal mold | |
| CN106284997A (en) | The big punching block construction method for lifting whole of reinforced concrete chimney | |
| CN112758803B (en) | Method for hanging prefabricated box girder and changing hooks in air |
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 | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20210205 |
|
| RJ01 | Rejection of invention patent application after publication |