CN108789794B - PCCP (prestressed concrete cylinder pipe) guniting system and application thereof - Google Patents
PCCP (prestressed concrete cylinder pipe) guniting system and application thereof Download PDFInfo
- Publication number
- CN108789794B CN108789794B CN201810550208.9A CN201810550208A CN108789794B CN 108789794 B CN108789794 B CN 108789794B CN 201810550208 A CN201810550208 A CN 201810550208A CN 108789794 B CN108789794 B CN 108789794B
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- pccp
- pccp pipe
- support
- rotary platform
- pipe
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- 239000011513 prestressed concrete Substances 0.000 title description 4
- 238000005070 sampling Methods 0.000 claims abstract description 63
- 239000004570 mortar (masonry) Substances 0.000 claims abstract description 21
- 238000000034 method Methods 0.000 claims abstract description 14
- 238000005507 spraying Methods 0.000 claims abstract description 7
- 238000002347 injection Methods 0.000 claims abstract description 5
- 239000007924 injection Substances 0.000 claims abstract description 5
- 238000003825 pressing Methods 0.000 claims description 34
- 238000005498 polishing Methods 0.000 claims description 19
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 9
- 238000010521 absorption reaction Methods 0.000 claims description 8
- 210000000078 claw Anatomy 0.000 claims description 6
- 238000004140 cleaning Methods 0.000 claims description 4
- 238000005452 bending Methods 0.000 claims description 3
- 229910000831 Steel Inorganic materials 0.000 abstract description 19
- 239000010959 steel Substances 0.000 abstract description 19
- 238000005096 rolling process Methods 0.000 abstract description 8
- 238000004519 manufacturing process Methods 0.000 description 4
- 239000010410 layer Substances 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 1
- 230000003203 everyday effect Effects 0.000 description 1
- 238000007517 polishing process Methods 0.000 description 1
- 238000011112 process operation Methods 0.000 description 1
- 239000011241 protective layer Substances 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B11/00—Apparatus or processes for treating or working the shaped or preshaped articles
- B28B11/22—Apparatus or processes for treating or working the shaped or preshaped articles for cleaning
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B27/00—Other grinding machines or devices
- B24B27/033—Other grinding machines or devices for grinding a surface for cleaning purposes, e.g. for descaling or for grinding off flaws in the surface
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B19/00—Machines or methods for applying the material to surfaces to form a permanent layer thereon
- B28B19/0038—Machines or methods for applying the material to surfaces to form a permanent layer thereon lining the outer wall of hollow objects, e.g. pipes
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/02—Devices for withdrawing samples
- G01N1/10—Devices for withdrawing samples in the liquid or fluent state
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/02—Devices for withdrawing samples
- G01N1/10—Devices for withdrawing samples in the liquid or fluent state
- G01N2001/1006—Dispersed solids
- G01N2001/1012—Suspensions
- G01N2001/1025—Liquid suspensions; Slurries; Mud; Sludge
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Mechanical Engineering (AREA)
- Analytical Chemistry (AREA)
- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Ceramic Engineering (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Hydrology & Water Resources (AREA)
- Structural Engineering (AREA)
- Cleaning In General (AREA)
Abstract
The application relates to a PCCP pipe guniting device, in particular to a PCCP guniting system and application thereof; the device comprises a rotary platform and an upright post standing beside the rotary platform; the upper end face of the rotary platform is provided with a support for clamping and fixing the PCCP pipe, and a mortar spraying machine for performing mortar roller injection on the PCCP pipe is movably arranged on the upright post; the support is fixed with a sampling device which is clung to the outer wall of the PCCP pipe. By implementing the technical scheme, the sampling device is fixed on the support and is tightly attached to the outer wall of the PCCP pipe, the sampling device can stably bear the roller jet force and the centrifugal force of the rotary platform, and the sampling process is safe, convenient and quick; the rotary electric brush is pushed to the working surface of the socket of the PCCP pipe through the air cylinder, so that the steel wire rolling brush on the rotary electric brush is tightly attached to the working surface of the socket, and the rotary electric brush and the rotary platform are started, so that the socket can be cleaned uniformly, quickly, simply and efficiently.
Description
Technical Field
The application relates to a PCCP pipe guniting device, in particular to a PCCP guniting system and application thereof.
Background
Prestressed concrete cylinder pipe (Prestressed Concrete Cylinder Pipe, abbreviated as PCCP).
In the PCCP pipe grouting operation, a mortar water absorption sample is required to be manufactured, and after the PCCP pipe grouting operation is finished, the mortar of a PCCP pipe socket is required to be polished.
The current method for adopting the mortar water absorption rate sample is as follows: and vertically attaching the sampling steel plate to the outer wall of the tube core wound with the prestressed steel wire, binding and fixing the upper and lower positions of the sampling steel plate to the outer wall of the tube core by using the steel wire, and manufacturing a mortar water absorption sample while performing protective layer mortar roller shooting. In the roller shooting process, the steel wires bundled can be loosened under the action of the mortar roller shooting force, the horizontal rotation force of the large rotary disc of the guniting machine and the centrifugal force generated during rotation, and then the sampling steel plates are shifted to cause uneven sampling. In addition, after the roller injection is completed, the steel wire can be buried in the mortar protection layer, so that the phenomena of loosening, material shortage and the like of the internal structure of the sample are caused when the steel wire is stripped from the sample in the sampling process; in addition, the prestressed steel wire wound on the outer wall of the tube core can be damaged or broken due to the action of external force, so that certain quality hidden danger and economic loss are caused. The method can be completed by at least 2 persons, is time-consuming and labor-consuming, has high operation difficulty, and can not easily ensure the quality of the prepared sample.
At present, the cleaning procedure corresponding to the PCCP pipe socket is that after the PCCP protection layer is manufactured, the pipeline is dumped to a repair area to be laid down, and manual polishing is adopted in the repair area, so that mortar on the socket is solidified and difficult to clean due to long polishing interval time after the completion of guniting. The traditional polishing mode of the steel wire brush burrs are easy to fall off to hurt people, the safety is low, the polishing speed is low, the polishing is incomplete and unclean, the equipment damage frequency is high, and more manpower is required to be equipped. The size requirement of the faucet working face of the PCCP pipe is very accurate, the requirement on the quality of the working face is very high, if the faucet working face is not polished cleanly, the faucet quality is directly affected, after the pipeline is installed, the phenomena of loose sealing, water leakage and the like in the pressure test process can possibly occur, and the product quality cannot be ensured.
Disclosure of Invention
The PCCP guniting system is safe, convenient, quick and easy to operate in the mortar water absorption rate sampling process, simple in PCCP pipe socket polishing process, high in working efficiency, labor-saving, high in safety and good in polishing quality.
One of the technical schemes of the application is realized as follows: the PCCP guniting system comprises a rotary platform and an upright post standing beside the rotary platform; the upper end face of the rotary platform is provided with a support for clamping and fixing the PCCP pipe, and a mortar spraying machine for performing mortar roller injection on the PCCP pipe is movably arranged on the upright post; the support is fixedly provided with a sampling device which is clung to the outer wall of the PCCP pipe; the upright post is hinged with a connecting bracket capable of swinging, a cylinder capable of positioning the connecting bracket is also connected between the connecting bracket and the upright post, and the other end of the connecting bracket is fixedly provided with a rotary electric brush corresponding to the socket position of the PCCP pipe.
Further, the sampling device comprises an L-shaped sampling plate, a pressing plate and a positioning base which can be clamped and fixed on the support; the transverse edge of the L-shaped sampling plate is fixedly arranged on the upper end surface of the positioning base through a pressing plate, and the vertical edge of the L-shaped sampling plate is tightly attached to the outer wall of the PCCP pipe.
Furthermore, the two sides of the positioning base are respectively provided with a claw which is formed by bending downwards and can be clamped on the support, and the claw and the support form positioning through a positioning bolt; the pressing plate is covered on the L-shaped sampling plate and is tightly attached to the transverse edge of the positioning base; one end of the pressing plate is rotatably opened and closed through a hinge shaft and is arranged on the positioning base, and the other end of the pressing plate is fixedly arranged on the positioning base through a bolt.
Further, the lower end face of the pressing plate is provided with a pressing groove, and the inner end face of the pressing groove is provided with anti-skid patterns.
Further, six supports for clamping and fixing the PCCP are uniformly arranged on the upper end surface of the rotary platform along the circumference, and a rubber plug tightly propped against the inner wall of the PCCP is fixed on each support; and a sampling device which is tightly attached to the outer wall of the PCCP pipe is fixed on any support.
Further, a vertical rotating shaft is arranged on the upright post, the rear end of the connecting support is connected with the rotating shaft, the front end of the connecting support is connected with the rotating electric brush, and a cylinder is connected between the middle of the connecting support and the upright post.
The second technical scheme of the application is realized as follows: an application of a PCCP guniting system, characterized by the steps of: the first step, after the PCCP pipe is fixed on the support, fixing the sampling device and enabling the sampling device to be tightly attached to the outer wall of the PCCP pipe; secondly, starting a rotary platform, performing roller jet grouting on the PCCP pipe, and completing the mortar water absorption sampling work by a sampling device; thirdly, after the roller spraying is finished, a cylinder is started to push the rotary electric brush to the working surface of the socket of the PCCP pipe and cling to the working surface of the socket of the PCCP pipe, and the cylinder is kept in position; step four, starting a rotary electric brush and a rotary platform, and polishing and cleaning a socket of the PCCP pipe; and fifthly, closing the rotating electric brush and the rotary platform, and enabling the starting cylinder to retract the rotating electric brush.
By implementing the technical scheme, the sampling device is fixed on the support and is tightly attached to the outer wall of the PCCP pipe, when the PCCP pipe performs roller jet grouting along with the rotary platform, the sampling device can stably bear roller jet force and centrifugal force of the rotary platform, and the sampling process is safe, convenient and quick; the rotary electric brush is pushed to the working surface of the socket of the PCCP pipe through the air cylinder, so that the steel wire rolling brush on the rotary electric brush is tightly attached to the working surface of the socket, and the rotary electric brush and the rotary platform are started, so that the socket can be cleaned uniformly, quickly, simply and efficiently.
Drawings
The specific structure of the present application is given by the following figures and examples:
FIG. 1 is a schematic structural view of embodiment 1 of the present application;
FIG. 2 is an enlarged schematic view of the sampling device of FIG. 1;
FIG. 3 is a left side elevational schematic of FIG. 2;
fig. 4 is a schematic view of the rotating brush of fig. 1.
Legend: 1. the hydraulic control system comprises a rotary platform, a stand column, a PCCP pipe, a support, a slurry spraying machine, a connecting support, a cylinder, a rotary brush, a 9.L type sampling plate, a pressing plate, a positioning base, a clamping jaw, a hinging shaft, a bolt, a pressing groove, a clamping groove, a skid-proof line, a rubber plug, a rotary shaft and an operating chamber.
Detailed Description
The present application is not limited by the following examples, and specific embodiments may be determined according to technical solutions and practical situations of the present application.
Embodiment 1 as shown in fig. 1 to 4, the PCCP guniting system includes a rotary platform 1 and a column 2 standing aside the rotary platform 1; a support 4 for clamping and fixing the PCCP pipe 3 is arranged on the upper end surface of the rotary platform 1, and a guniting machine 5 for carrying out mortar roller injection on the PCCP pipe 3 is movably arranged on the upright post 2; the support 4 is fixedly provided with a sampling device which is clung to the outer wall of the PCCP pipe 3; the upright post 2 is hinged with a connecting bracket 6 capable of swinging, a cylinder 7 capable of positioning the connecting bracket 6 is also connected between the connecting bracket 6 and the upright post 2, and the other end of the connecting bracket 6 is fixedly provided with a rotary electric brush 8 corresponding to the socket position of the PCCP pipe 3.
The sampling device is fixed on the support 4 and is tightly attached to the outer wall of the PCCP pipe 3, when the PCCP pipe 3 performs roller jet grouting along with the rotary platform 1, the sampling device can sample the surface of the PCCP pipe 3, the process is stable, the capability of bearing roller jet force and the centrifugal force of the rotary platform 1 is strong, and the sampling is safe, convenient and quick; the cylinder 7 can push the rotating electric brush 8 to the working surface of the socket of the PCCP pipe 3, so that the steel wire rolling brush on the rotating electric brush 8 is clung to the working surface of the socket, the working surface of the socket of the PCCP pipe 3 is polished and cleaned, the mechanical polishing force is uniform, the stability is high, the polishing quality is far beyond that of manual polishing, and the material use is more saved.
As shown in fig. 1 to 3, the sampling device comprises an L-shaped sampling plate 9, a pressing plate 10 and a positioning base 11 which can be clamped and fixed on the support 4; the transverse edge of the L-shaped sampling plate 9 is fixedly arranged on the upper end face of the positioning base 11 through a pressing plate 10, and the vertical edge of the L-shaped sampling plate 9 is tightly attached to the outer wall of the PCCP tube 3.
The transverse edge of the L-shaped sampling plate 9 is in large-area contact with the pressing plate 10 and the positioning base 11, so that the anti-skid property of the sampling device is greatly enhanced, the overall stability is improved, and the vertical edge of the L-shaped sampling plate 9 is enabled to fully and stably sample the surface of the PCCP tube 3.
As shown in fig. 1 to 3, two sides of the positioning base 11 are respectively provided with a claw 12 which is formed by bending downwards and can be clamped on the support 4, and the claw 12 and the support 4 form positioning through positioning bolts; the pressing plate 10 is pressed on the L-shaped sampling plate 9 and is tightly attached to the transverse edge of the positioning base 11; one end of the pressing plate 10 is rotatably arranged on the positioning base 11 in an opening and closing manner through a hinge shaft 13, and the other end of the pressing plate 10 is fixedly arranged on the positioning base 11 through a bolt 14.
In operation, the positioning base 11 is firstly fixed at a proper position of the support 4 through positioning bolts, the bolts 14 at one end of the pressing plate 10 are dismounted, the pressing plate 10 is turned and opened, the transverse edge of the L-shaped sampling plate 9 is arranged on the positioning base 11, the pressing plate 10 is turned and closed, and the bolts 14 are screwed. The transverse and vertical edges of the L-shaped sampling plate 9 can be made of thick steel plates with the thickness of 8-10mm, so that the effects of roller jet force, centrifugal force and the like can be borne in the mortar roller jet process. The process is convenient and quick, the L-shaped sampling plate 9 can be detached only by loosening or tightening the bolts 14 each time, the sampling position cannot be moved, and the whole process operation is completed by only one person; the method has the advantages of avoiding the damage of external force to the prestressed steel wire, reducing the sampling cost, saving time, greatly improving the working efficiency, solving the problems of high field sampling difficulty, long time consumption, high cost and the like, and solving the problem of difficult sampling of the water absorption sample for a long time.
As shown in fig. 3, the lower end surface of the pressing plate 10 is provided with a pressing groove 15, and the inner end surface of the pressing groove 15 is provided with anti-slip patterns 16. The shape and the size of the pressing groove 15 can be corresponding to the transverse edge of the L-shaped sampling plate 9, and the design of the anti-skid patterns 16 can ensure the accuracy of the fixing position and the fixing firmness of the L-shaped sampling plate 9 to the greatest extent.
As shown in fig. 1 to 3, six supports 4 for clamping and fixing the PCCP pipe 3 are uniformly arranged on the upper end surface of the rotary platform 1 along the circumference, and a rubber plug 17 tightly propped against the inner wall of the PCCP pipe 3 is fixed on each support 4; a sampling device which is tightly attached to the outer wall of the PCCP pipe 3 is fixed to any one of the holders 4.
As shown in fig. 4, a vertical rotating shaft 18 is arranged on the upright post 2, the rear end of the connecting bracket 6 is connected with the rotating shaft 18, the front end of the connecting bracket 6 is connected with the rotating electric brush 8, and a cylinder 7 is connected between the middle part of the connecting bracket 6 and the upright post 2.
When the operation is finished, after the mortar roller of the outer wall protection layer of the PPCP pipe is shot, the controller of the starting cylinder 7 pushes the rotary electric brush 8 to the socket working surface of the PCCP pipe 3, so that the steel wire rolling brush of the rotary electric brush 8 is tightly attached to the socket working surface, the motor of the rotary electric brush 8 and the rotary platform 1 are started, and the steel wire rolling brush starts to polish. The whole polishing work can be completed within 1-2 minutes, and the working process is simple and convenient to operate and easy to operate. The controller of the air cylinder 7, the control switch of the rotary electric brush 8 and the control switch of the rotary platform 1 can be centralized in an operation room 19, so that the operation can be independently finished by one person.
The polishing machine has the advantages that manual polishing operation is avoided, the safety of operation is improved, the production efficiency is improved, the mechanical polishing force is uniform, the stability is high, the polishing quality is far beyond that of manual polishing, and the material use is more saved. During operation, only 1 person is needed to control, 5-10 manpower is saved, and the polishing speed is approximately 8-10 times faster than that of the traditional mode; the steel wire rolling brush is replaced once for about a week, the rolling brush does not need to be replaced every day, the time for manually replacing the steel wire rolling brush is saved, the continuity and stability of production are guaranteed, and the problems that enterprises are stressed, operation safety is high, production efficiency is low, technology is lagged, quality cannot be improved and the like for a long time are solved.
Embodiment 2, as shown in fig. 1 to 4, an application of a PCCP guniting system, is characterized by comprising the steps of: the first step, after the PCCP pipe 3 is fixed on the support 4, fixing the sampling device and enabling the sampling device to be tightly attached to the outer wall of the PCCP pipe 3; secondly, starting the rotary platform 1, performing roller jet grouting on the PCCP pipe 3, and completing the mortar water absorption sampling work by the sampling device; thirdly, after the roller spraying is finished, the cylinder 7 is started to push the rotary electric brush 8 to the working surface of the socket of the PCCP pipe 3 and cling to the working surface of the socket of the PCCP pipe 3, and the cylinder 7 is kept in position; step four, starting the rotary electric brush 8 and the rotary platform 1, and polishing and cleaning the socket of the PCCP pipe 3; and fifthly, closing the rotating electric brush 8 and the rotary platform 1, and enabling the cylinder 7 to retract the rotating electric brush 8.
The technical characteristics form the embodiment of the application, have stronger adaptability and implementation effect, and can increase or decrease unnecessary technical characteristics according to actual needs so as to meet the needs of different situations.
Claims (6)
1. A PCCP guniting system, comprising: the device comprises a rotary platform and a stand column standing beside the rotary platform; the upper end face of the rotary platform is provided with a support for clamping and fixing the PCCP pipe, and a mortar spraying machine for performing mortar roller injection on the PCCP pipe is movably arranged on the upright post; the method is characterized in that: the support is fixedly provided with a sampling device which is clung to the outer wall of the PCCP pipe; a connecting bracket capable of swinging is hinged on the upright post, a cylinder capable of positioning the connecting bracket is also connected between the connecting bracket and the upright post, and a rotary electric brush corresponding to the socket position of the PCCP pipe is fixedly arranged at the other end of the connecting bracket;
the sampling device comprises an L-shaped sampling plate, a pressing plate and a positioning base which can be clamped and fixed on the support; the transverse edge of the L-shaped sampling plate is fixedly arranged on the upper end surface of the positioning base through a pressing plate, and the vertical edge of the L-shaped sampling plate is tightly attached to the outer wall of the PCCP pipe;
six supports for clamping and fixing the PCCP are uniformly arranged on the upper end surface of the rotary platform along the circumference, and a rubber plug tightly propped against the inner wall of the PCCP is fixed on each support; and a sampling device which is tightly attached to the outer wall of the PCCP pipe is fixed on any support.
2. The PCCP guniting system according to claim 1, characterized in that: the two sides of the positioning base are respectively provided with a claw which is formed by bending downwards and can be clamped on the support, and the claw and the support form positioning through a positioning bolt; the pressing plate is covered on the L-shaped sampling plate and is tightly attached to the transverse edge of the positioning base; one end of the pressing plate is rotatably opened and closed through a hinge shaft and is arranged on the positioning base, and the other end of the pressing plate is fixedly arranged on the positioning base through a bolt.
3. The PCCP guniting system according to claim 1, characterized in that: the lower end face of the pressing plate is provided with a pressing groove, and the inner end face of the pressing groove is provided with anti-skid patterns.
4. The PCCP guniting system according to claim 2, characterized in that: the lower end face of the pressing plate is provided with a pressing groove, and the inner end face of the pressing groove is provided with anti-skid patterns.
5. The PCCP guniting system according to claim 1 or 2 or 3 or 4, characterized in that: the upright post is provided with a vertical rotating shaft, the rear end of the connecting bracket is connected with the rotating shaft, the front end of the connecting bracket is connected with the rotating electric brush, and a cylinder is connected between the middle part of the connecting bracket and the upright post.
6. Use of the PCCP guniting system according to any of claims 1-5, characterized in that it comprises the steps of:
the first step, after the PCCP pipe is fixed on the support, fixing the sampling device and enabling the sampling device to be tightly attached to the outer wall of the PCCP pipe;
secondly, starting a rotary platform, performing roller jet grouting on the PCCP pipe, and completing the mortar water absorption sampling work by a sampling device;
thirdly, after the roller spraying is finished, a cylinder is started to push the rotary electric brush to the working surface of the socket of the PCCP pipe and cling to the working surface of the socket of the PCCP pipe, and the cylinder is kept in position;
step four, starting a rotary electric brush and a rotary platform, and polishing and cleaning a socket of the PCCP pipe;
and fifthly, closing the rotating electric brush and the rotary platform, and enabling the starting cylinder to retract the rotating electric brush.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810550208.9A CN108789794B (en) | 2018-05-31 | 2018-05-31 | PCCP (prestressed concrete cylinder pipe) guniting system and application thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810550208.9A CN108789794B (en) | 2018-05-31 | 2018-05-31 | PCCP (prestressed concrete cylinder pipe) guniting system and application thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108789794A CN108789794A (en) | 2018-11-13 |
| CN108789794B true CN108789794B (en) | 2024-02-27 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810550208.9A Active CN108789794B (en) | 2018-05-31 | 2018-05-31 | PCCP (prestressed concrete cylinder pipe) guniting system and application thereof |
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| CN (1) | CN108789794B (en) |
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| Title |
|---|
| 阙小平 ; 张秀菲 ; .PCCP砂浆保护层吸水率的质量控制方法研究.混凝土与水泥制品.2018,(04),全文. * |
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| Publication number | Publication date |
|---|---|
| CN108789794A (en) | 2018-11-13 |
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