CN115288476A - Water jet breaking and dismantling method based on pre-cracked concrete structure - Google Patents
Water jet breaking and dismantling method based on pre-cracked concrete structure Download PDFInfo
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- CN115288476A CN115288476A CN202210917900.7A CN202210917900A CN115288476A CN 115288476 A CN115288476 A CN 115288476A CN 202210917900 A CN202210917900 A CN 202210917900A CN 115288476 A CN115288476 A CN 115288476A
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- 239000004567 concrete Substances 0.000 title claims abstract description 74
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 54
- 238000000034 method Methods 0.000 title claims abstract description 34
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 17
- 239000010959 steel Substances 0.000 claims abstract description 17
- 238000010276 construction Methods 0.000 claims abstract description 15
- 239000011150 reinforced concrete Substances 0.000 claims abstract description 13
- 238000005553 drilling Methods 0.000 claims abstract description 12
- 239000000463 material Substances 0.000 claims abstract description 11
- 238000005507 spraying Methods 0.000 claims abstract description 11
- 239000002699 waste material Substances 0.000 claims abstract description 9
- 238000002347 injection Methods 0.000 claims description 12
- 239000007924 injection Substances 0.000 claims description 12
- 239000002002 slurry Substances 0.000 claims description 9
- 239000003795 chemical substances by application Substances 0.000 claims description 6
- 230000003068 static effect Effects 0.000 claims description 6
- 239000011435 rock Substances 0.000 claims description 5
- 230000004888 barrier function Effects 0.000 claims description 4
- 238000004140 cleaning Methods 0.000 claims description 4
- 230000001681 protective effect Effects 0.000 claims description 4
- 238000005336 cracking Methods 0.000 claims description 3
- 238000003912 environmental pollution Methods 0.000 abstract 1
- 239000000243 solution Substances 0.000 description 6
- 229910001294 Reinforcing steel Inorganic materials 0.000 description 5
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000002349 favourable effect Effects 0.000 description 2
- 230000014759 maintenance of location Effects 0.000 description 2
- 230000002787 reinforcement Effects 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 238000009435 building construction Methods 0.000 description 1
- 230000008094 contradictory effect Effects 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
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- 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
- E04G23/00—Working measures on existing buildings
- E04G23/08—Wrecking of buildings
-
- 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
- E04G23/00—Working measures on existing buildings
- E04G23/08—Wrecking of buildings
- E04G23/081—Wrecking of buildings using hydrodemolition
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Mechanical Engineering (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Working Measures On Existing Buildindgs (AREA)
Abstract
The invention discloses a water jet breaking method based on a pre-cracked concrete structure, which comprises the following steps: (1) Positioning and drilling a reinforced concrete structure to be broken; (2) Pre-splitting the reinforced concrete structure by adopting a hydraulic splitter and an expansion material mode; (3) Moving the high-pressure water jet breaking-in robot equipment to enable the mechanical arm to be close to the spraying range of the surface of the concrete structure, and adjusting the angle of the spraying device; (4) Starting an equipment pressure pump, controlling the pressure intensity of the sprayed water, operating the demolition robot to erode the concrete structure, and completely reserving the internal longitudinal and transverse steel bars while demolishing the concrete; (5) And collecting and treating the concrete waste residues broken on site. According to the invention, the concrete is broken by using a high-pressure water jet mode, so that the labor force of workers is saved, the environmental pollution and the damage of the original structure are reduced, and the mode of drilling and concrete pre-splitting is adopted before breaking, so that the later breaking and dismantling efficiency is greatly improved, and the construction design requirement is met.
Description
Technical Field
The invention relates to the technical field of building construction, in particular to a water jet breaking and dismantling method based on a pre-cracked concrete structure.
Background
At present, a concrete structure demolition method in building engineering mainly adopts manual demolition and mechanical equipment demolition, wherein the manual demolition requires a worker to demolish the concrete surface on a temporary operation platform by holding a pneumatic pick device, and the demolition mode has the conditions of high requirement on the labor intensity of the operator, high danger, low demolition efficiency, long construction period and the like; machinery demolishs equipment and chisels the concrete structure through large-scale machinery, and its construction degree of difficulty is great, the mechanism device operation is complicated, chiseling the accuracy low, the process requirement is strict, and the easy polluted environment of concrete dust that produces in the work progress, often because the former concrete structure crack extension of big leading to the fact of mechanical drill bit impact strength, the inside reinforcing bar is impaired seriously, is unfavorable for later stage structure atress. The traditional manual and mechanical dismantling methods have the problems of low construction efficiency, high quality safety hidden danger, multiple environmental influence factors and the like, so that the development of the water jet dismantling method based on the pre-cracked concrete structure is very important in engineering significance.
Disclosure of Invention
Aiming at the problems in the prior art, the invention aims to: the water jet nondestructive demolition method for the pre-cracked concrete structure is environment-friendly, dust-free, high in field operation safety coefficient, short in construction period and free of damage to reinforced concrete at a non-demolished part of an original structure.
The invention provides the following technical scheme: a water jet breaking and dismantling method based on a pre-cracked concrete structure comprises the following steps:
(1) Determining the position of a steel bar in the concrete structure according to the scanning of a steel bar detector, performing drilling positioning based on the vertical concrete surface without the steel bar, and drilling and cleaning holes along the direction of a positioning point by adopting a pneumatic rock drill;
(2) Pre-splitting the reinforced concrete structure by adopting a hydraulic splitter and an expansion material mode;
(3) Moving the high-pressure water jet breaking-in robot equipment to enable the mechanical arm to be close to the spraying range of the surface of the concrete structure, adjusting the angle of the spraying device and arranging a protective barrier;
(4) Starting a pressure pump of the device, controlling the pressure intensity of the sprayed water, operating the demolition robot to erode the concrete structure, and completely retaining the internal longitudinal and transverse steel bars while demolishing the concrete;
(5) And the concrete waste residues broken off on site are collected and treated, so that the pollution of construction waste is reduced.
Further, the diameter of the drilled hole in the step (1) is 42mm, and the depth of the drilled hole is 100-150mm.
Further, the drill holes in the step (1) are distributed in a grid shape, the transverse row spacing of the drill holes is 250-350mm, the longitudinal row spacing of the drill holes is 300-450mm, and the drill hole positions and the non-breaking-dismantling area keep a proper distance to prevent pre-breaking damage to the original structure.
Further, the splitting force of the hydraulic splitting machine in the step (2) is 800T, the splitting block of the splitter at the front end of the hydraulic splitting machine is inserted into the drill hole, after the splitter is started, each drill hole is split once according to two orthogonal directions, and the splitting time is 8-10 seconds each time.
Further, the expansion material in the step (2) is a paste-like slurry with good fluidity formed by mixing a static expansion agent and water according to the proportion of 3:1, wherein the dosage of the static expansion agent is 10-20 kg/time, and the generated expansion pressure is more than or equal to 50MPa.
Further, the expansion slurry in the step (2) is injected into the drill hole within 30min after the complete mixing, the injection is carried out until the injection is close to the surface of the hole opening, the horizontal drill hole needs to be plugged, the leakage of the expansion slurry is prevented, and the pre-cracking time of the concrete is 8-12h.
Further, the forcible entry robot in the step (3) reasonably adjusts the injection angle and the target distance according to the field position range condition, and the injection target distance is 50-110mm.
Further, the water jet pressure intensity in the step (4) is determined according to the intensity and the depth of the concrete structure of the area to be demolished, and the water pressure range is 100-150MPa.
Furthermore, a hydraulic power system and an injection system in the breaking-in robot are controlled through a remote control system, and parameters set by equipment under various working conditions are collected, so that the improvement of the breaking-in method is facilitated.
Through the technical scheme, compared with the prior art, the invention has the beneficial effects that:
(1) The water jet flow breaking-in method based on the pre-cracked concrete structure can be used for quickly breaking-in the reinforced concrete structure, compared with the traditional breaking-in method, the breaking-in efficiency is greatly improved, the labor intensity can be reduced, the concrete can be broken in a dust-free mode, and efficient construction, safe construction and green construction are achieved.
(2) On the basis of a high-pressure water jet technology, the method is further combined with a concrete pre-splitting mode, expansion materials are poured into the holes before breaking and dismantling, the expansion of cracks in the concrete structure is accelerated, favorable conditions are provided for water jet breaking, the breaking and dismantling efficiency of the water jet is increased to 0.8-1.0m3/h from the original value, and the comprehensive efficiency is improved by more than 1 time.
(3) According to the water jet flow demolition method based on the pre-cracked concrete structure, the crushing mechanism of the water jet flow is fully utilized, the nondestructive retention of the reinforcing steel bars in the demolition structure is realized, the later reinforcing steel bar welding connection and the pouring reinforcement are facilitated, the accurate demolition effect can be achieved, the concrete structure in a non-demolition area is not damaged, and the demolition quality is further improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without inventive exercise:
FIG. 1 is a schematic plan view of a reinforced concrete structure according to the present invention;
FIG. 2 is a schematic cross-sectional view of a drilled hole of a reinforced concrete structure according to the present invention;
FIG. 3 is a schematic diagram of the presplitting of the hydraulic splitting machine in the hole of the reinforced concrete structure;
FIG. 4 is a schematic view of the presplitting of the expansive material in the hole of the reinforced concrete structure according to the present invention;
fig. 5 is a schematic diagram of the high-pressure water jet breaking-in of the pre-cracked concrete structure of the invention.
In the figure: 1. a concrete structure; 2. reinforcing steel bars; 3. drilling; 4. a pneumatic rock drill; 5. an intumescent material; 6. breaking and dismantling the robot; 7. and (4) a spraying device.
Detailed Description
The present invention will be described in further detail with reference to specific embodiments. In order to more clearly describe the objects, technical solutions and novel points of the present invention, the following further description is provided by combining some examples of the present invention, but not all examples, and the illustrative examples and descriptions of the present invention are used to explain the present invention, but not to limit the present invention.
It is to be understood that, unless otherwise explicitly stated or limited, the term "coupled" is used broadly in the present invention, for example, the term "coupled" may be a fixed connection, a detachable connection, or an integral part; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood according to specific situations by those of ordinary skill in the art.
In addition, technical solutions between the embodiments may be combined with each other, but must be based on the realization of the technical solutions by a person skilled in the art, and when the technical solutions are contradictory to each other or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.
Example 1
A water jet breaking and dismantling method based on a pre-cracked concrete structure is characterized by comprising the following steps of:
(1) Determining the position of a steel bar 2 in the concrete structure 1 according to the scanning of a steel bar detector, performing drilling 3 positioning on the basis of the vertical concrete surface without the steel bar, and drilling 3 and cleaning holes along the direction of a positioning point by adopting a pneumatic rock drill 4; wherein the diameter of the drill hole 3 is 42mm, and the depth of the drill hole 3 is 150mm; the drill holes 3 are distributed in a grid shape, the transverse row spacing of the drill holes 3 is 300mm, the longitudinal row spacing of the drill holes 3 is 350mm, the position of each drill hole 3 keeps a proper distance from a non-breaking-in area, and the pre-splitting is prevented from damaging the original structure, as shown in figure 1.
(2) Pre-splitting the reinforced concrete structure 1 by adopting a hydraulic splitter; the splitting force of the hydraulic splitting machine is 800T, the splitting block of the splitter at the front end of the hydraulic splitting machine is inserted into the drill hole, and after the splitter is started, each drill hole is split once according to two orthogonal directions, as shown in fig. 3, wherein the splitting time is 8-10 seconds each time.
(3) Moving the high-pressure water jet breaking and dismantling robot 6 equipment to enable the mechanical arm to be close to the spraying range of the surface of the concrete structure, adjusting the angle of the spraying device 7 and arranging a protective barrier; the forcible entry robot 6 reasonably adjusts the injection angle and the target distance according to the site position range condition, and the injection target distance is 100mm.
(4) Starting the equipment pressure pump, controlling the pressure intensity of the sprayed water, operating the demolition robot 6 to erode the concrete structure 1 as shown in fig. 5, and completely retaining the internal longitudinal and transverse steel bars 2 while demolishing the concrete; wherein the water jet pressure intensity is determined according to the intensity and the depth of the concrete structure 1 of the area to be demolished, and the water pressure range is 110MPa.
(5) The concrete waste residues broken on site are collected and treated, and the pollution of construction waste is reduced.
The hydraulic power system and the injection system in the breaking-in robot are controlled through the remote control system, and parameters set by equipment under various working conditions are collected, so that the breaking-in method is improved.
Example 2
A water jet breaking and dismantling method based on a pre-cracked concrete structure is characterized by comprising the following steps of:
(1) Determining the position of a steel bar in the concrete structure 1 according to the scanning of a steel bar detector, performing drilling 3 positioning on the basis of the concrete surface without the steel bar 2 in the vertical direction, and drilling and cleaning holes along the direction of a positioning point by adopting a pneumatic rock drill 4; wherein the diameter of the drill hole 3 is 42mm, and the depth of the drill hole 3 is 120mm; the drill holes 3 are distributed in a grid shape, the transverse row spacing of the drill holes 3 is 300mm, the longitudinal row spacing of the drill holes 3 is 300mm, the position of each drill hole 3 keeps a proper distance from a non-breaking-in area, and the pre-splitting is prevented from damaging the original structure, as shown in figure 1.
(2) Pre-splitting the reinforced concrete structure 1 by means of the expansion material 5, as shown in fig. 4; wherein the expansion material 5 is a viscous paste with good fluidity formed by mixing a static expansion agent and water according to the proportion of 3:1, the using amount of the static expansion agent is 18 kg/time, and the generated expansion pressure is more than or equal to 50MPa; the expansion slurry is injected into the drill hole 3 within 30min after the full mixing is finished, the expansion slurry is injected to be close to the surface of the hole, the horizontal drill hole needs to be plugged, the expansion slurry is prevented from leaking, and the concrete pre-cracking time is 12h.
(3) Moving the high-pressure water jet breaking and dismantling robot 6 equipment to enable the mechanical arm to be close to the spraying range of the surface of the concrete structure, adjusting the angle of the spraying device 7 and arranging a protective barrier; the forcible entry robot 6 reasonably adjusts the injection angle and the target distance according to the site position range condition, and the injection target distance is 100mm.
(4) Starting the equipment pressure pump, controlling the pressure intensity of the sprayed water, operating the demolition robot 6 to erode the concrete structure 1 as shown in fig. 5, and completely retaining the internal longitudinal and transverse steel bars while demolishing the concrete; wherein the water jet pressure intensity is determined according to the intensity and the depth of the concrete structure 1 of the area to be demolished, and the water pressure range is 150MPa.
(5) And the concrete waste residues broken off on site are collected and treated, so that the pollution of construction waste is reduced.
The hydraulic power system and the injection system in the breaking-in robot are controlled through the remote control system, and parameters set by the equipment under various working conditions are collected, so that the improvement of the breaking-in method is facilitated.
Compared with the prior art, the invention has the beneficial effects that:
(1) The water jet breaking and dismantling method based on the pre-cracked concrete structure can be used for quickly breaking and dismantling the reinforced concrete structure, and compared with the traditional breaking and dismantling method, the water jet breaking and dismantling method not only greatly improves the breaking and dismantling efficiency, but also can reduce the labor intensity, breaks and removes concrete dustlessly, and realizes efficient construction, safe construction and green construction.
(2) On the basis of a high-pressure water jet technology, the method further combines a concrete pre-splitting mode, and fills an expansion material into the hole before breaking to accelerate the expansion of the crack in the concrete structure, so that favorable conditions are provided for water jet breaking, and the breaking efficiency of the water jet is not more than 0.5m from the original 3 H, increased to 0.8-1.0m after pre-splitting 3 And h, the comprehensive efficiency is improved by more than 1 time.
(3) According to the water jet flow breaking-in method based on the pre-cracked concrete structure, the breaking mechanism of the water jet flow is fully utilized, the nondestructive retention of the reinforcing steel bars in the breaking-in structure is realized, the later reinforcing steel bar welding connection and the pouring reinforcement are facilitated, the accurate breaking-in effect can be achieved, the concrete structure in a non-breaking-in area is not damaged, and the breaking-in quality is further improved.
The technical solutions provided by the embodiments of the present invention are described in detail above, and specific examples are applied herein to explain the principles and embodiments of the present invention, and the descriptions of the embodiments above are only used to help understanding the principles of the embodiments of the present invention; meanwhile, for a person skilled in the art, according to the embodiments of the present invention, there may be variations in the specific implementation manners and application ranges, and in summary, the content of the present description should not be construed as a limitation to the present invention.
Claims (9)
1. A water jet breaking and dismantling method based on a pre-cracked concrete structure is characterized by comprising the following steps:
(1) Determining the position of a steel bar in the concrete structure according to the scanning of a steel bar detector, performing drilling positioning based on the vertical concrete surface without the steel bar, and drilling and cleaning holes along the direction of a positioning point by adopting a pneumatic rock drill;
(2) Pre-splitting the reinforced concrete structure by adopting a hydraulic splitter and an expansion material mode;
(3) Moving the high-pressure water jet breaking-in robot equipment to enable the mechanical arm to be close to the spraying range of the surface of the concrete structure, adjusting the angle of the spraying device and arranging a protective barrier;
(4) Starting an equipment pressure pump, controlling the pressure intensity of the sprayed water, operating the demolition robot to erode the concrete structure, and completely reserving the internal longitudinal and transverse steel bars while demolishing the concrete;
(5) The concrete waste residues broken on site are collected and treated, and the pollution of construction waste is reduced.
2. The water jet demolition method based on the pre-cracked concrete structure as claimed in claim 1, characterized in that: the diameter of the drilled hole in the step (1) is 42mm, and the depth of the drilled hole is 100-150mm.
3. The water jet demolition method based on the pre-cracked concrete structure as claimed in claim 1, characterized in that: the drill holes in the step (1) are distributed in a grid shape, the transverse row spacing of the drill holes is 250-350mm, the longitudinal row spacing of the drill holes is 300-450mm, and the drill hole positions and the non-breaking-dismantling area keep a set distance, so that the pre-splitting is prevented from damaging the original structure.
4. The water jet demolition method based on the pre-cracked concrete structure as claimed in claim 1, characterized in that: and (3) the splitting force of the hydraulic splitting machine in the step (2) is 800T, the splitting block of the splitter at the front end of the hydraulic splitting machine is inserted into the drill hole, and after the splitter is started, each drill hole is split once according to two orthogonal directions, wherein the splitting time is 8-10 seconds each time.
5. The water jet demolition method based on the pre-cracked concrete structure as claimed in claim 1, characterized in that: the expansion material in the step (2) is a viscous paste with fluidity after being mixed by a static expansion agent and water according to the proportion of 3:1, wherein the dosage of the static expansion agent is 10-20 kg/time, and the generated expansion pressure is more than or equal to 50MPa.
6. The water jet demolition method based on the pre-cracked concrete structure as claimed in claim 1, characterized in that: and (3) injecting the expansion slurry in the step (2) into the drill hole within 30min after the complete mixing, injecting the expansion slurry to be close to the surface of the hole opening, and horizontally drilling the hole to block the hole to prevent the expansion slurry from leaking, wherein the pre-cracking time of the concrete is 8-12h.
7. The water jet demolition method based on the pre-cracked concrete structure as claimed in claim 1, characterized in that: and (4) reasonably adjusting the jetting angle and the target distance by the breaking and dismantling robot in the step (3) according to the field position range condition, wherein the jetting target distance is 50-110mm.
8. The water jet demolition method based on the pre-cracked concrete structure as claimed in claim 1, characterized in that: the water jet pressure intensity in the step (4) is determined according to the intensity and the depth of the concrete structure of the area to be broken and dismantled, and the water pressure range is 100-150MPa.
9. The water jet demolition method based on the pre-fractured concrete structure as recited in claim 7 or 8, wherein: the hydraulic power system and the injection system in the breaking-in robot are controlled through the remote control system, and parameters set by equipment under various working conditions are collected, so that the breaking-in method is improved.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210917900.7A CN115288476A (en) | 2022-08-01 | 2022-08-01 | Water jet breaking and dismantling method based on pre-cracked concrete structure |
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| CN202210917900.7A CN115288476A (en) | 2022-08-01 | 2022-08-01 | Water jet breaking and dismantling method based on pre-cracked concrete structure |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116876888A (en) * | 2023-06-30 | 2023-10-13 | 中国长江电力股份有限公司 | Construction method for dismantling runner chamber of hydroelectric generating set |
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| CN101985858A (en) * | 2010-09-30 | 2011-03-16 | 中国华西企业有限公司 | Hydraulic fracturing stripping unbonded prestressed reinforcement surface concrete construction method |
| CN102127975A (en) * | 2011-04-14 | 2011-07-20 | 葛培中 | Concrete beforehand pore-forming static breaking technology |
| CN106679519A (en) * | 2016-12-23 | 2017-05-17 | 中建八局第二建设有限公司 | Static blasting demolition method for interior reinforced concrete supports |
| JP2017141573A (en) * | 2016-02-09 | 2017-08-17 | 日本橋梁株式会社 | Solid splitting dismantling method using expansion tube and dismantling removal method of reinforced concrete slab of bridge |
| CN114541807A (en) * | 2022-03-23 | 2022-05-27 | 中建八局第三建设有限公司 | Static breaking construction method for reinforced concrete structure |
-
2022
- 2022-08-01 CN CN202210917900.7A patent/CN115288476A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101985858A (en) * | 2010-09-30 | 2011-03-16 | 中国华西企业有限公司 | Hydraulic fracturing stripping unbonded prestressed reinforcement surface concrete construction method |
| CN102127975A (en) * | 2011-04-14 | 2011-07-20 | 葛培中 | Concrete beforehand pore-forming static breaking technology |
| JP2017141573A (en) * | 2016-02-09 | 2017-08-17 | 日本橋梁株式会社 | Solid splitting dismantling method using expansion tube and dismantling removal method of reinforced concrete slab of bridge |
| CN106679519A (en) * | 2016-12-23 | 2017-05-17 | 中建八局第二建设有限公司 | Static blasting demolition method for interior reinforced concrete supports |
| CN114541807A (en) * | 2022-03-23 | 2022-05-27 | 中建八局第三建设有限公司 | Static breaking construction method for reinforced concrete structure |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116876888A (en) * | 2023-06-30 | 2023-10-13 | 中国长江电力股份有限公司 | Construction method for dismantling runner chamber of hydroelectric generating set |
| CN116876888B (en) * | 2023-06-30 | 2024-03-29 | 中国长江电力股份有限公司 | Construction method for dismantling runner chamber of hydroelectric generating set |
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Application publication date: 20221104 |