CN111139868A - Complete construction method for comprehensive pipe gallery - Google Patents
Complete construction method for comprehensive pipe gallery Download PDFInfo
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- CN111139868A CN111139868A CN202010070345.XA CN202010070345A CN111139868A CN 111139868 A CN111139868 A CN 111139868A CN 202010070345 A CN202010070345 A CN 202010070345A CN 111139868 A CN111139868 A CN 111139868A
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- pipe gallery
- comprehensive pipe
- reinforcement cage
- construction
- reinforcing bar
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D29/00—Independent underground or underwater structures; Retaining walls
- E02D29/045—Underground structures, e.g. tunnels or galleries, built in the open air or by methods involving disturbance of the ground surface all along the location line; Methods of making them
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D29/00—Independent underground or underwater structures; Retaining walls
- E02D29/04—Making large underground spaces, e.g. for underground plants, e.g. stations of underground railways; Construction or layout thereof
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D29/00—Independent underground or underwater structures; Retaining walls
- E02D29/10—Tunnels or galleries specially adapted to house conduits, e.g. oil pipe-lines, sewer pipes ; Making conduits in situ, e.g. of concrete ; Casings, i.e. manhole shafts, access or inspection chambers or coverings of boreholes or narrow wells
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D29/00—Independent underground or underwater structures; Retaining walls
- E02D29/16—Arrangement or construction of joints in foundation structures
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D31/00—Protective arrangements for foundations or foundation structures; Ground foundation measures for protecting the soil or the subsoil water, e.g. preventing or counteracting oil pollution
- E02D31/02—Protective arrangements for foundations or foundation structures; Ground foundation measures for protecting the soil or the subsoil water, e.g. preventing or counteracting oil pollution against ground humidity or ground water
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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Civil Engineering (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Paleontology (AREA)
- Environmental & Geological Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Hydrology & Water Resources (AREA)
- Sustainable Development (AREA)
- Lining And Supports For Tunnels (AREA)
Abstract
The invention relates to the technical field of comprehensive pipe gallery construction, in particular to a complete construction method for a comprehensive pipe gallery, which adopts sectional construction and comprises the following steps: a temporary processing factory for a reinforcement cage of a comprehensive pipe gallery is built on a construction site; constructing a foundation and a cushion layer of the comprehensive pipe gallery; transporting the reinforcement cage processed in the temporary processing factory to an excavation site and completing the assembly of the reinforcement cage; pouring bottom plate concrete of the comprehensive pipe gallery, and placing a sliding formwork in place after maintenance is finished; utilizing the slip form machine to finish concrete pouring of the vertical wall and the top plate of the comprehensive pipe gallery, and demolding by the slip form machine after maintenance is finished; and finally, performing waterproof treatment and earthwork backfilling on the construction section. The invention has the advantages that: the construction speed can be greatly improved, the work of binding the reinforcement cage is finished in a factory, the customized mould has uniqueness, and the slip form machine can be used as a template and can be repeatedly recycled for multiple times.
Description
Technical Field
The invention relates to the technical field of comprehensive pipe gallery construction, in particular to a complete construction method for a comprehensive pipe gallery.
Background
The utility tunnel is an underground city pipeline utility tunnel, a tunnel space that the city was built underground promptly, collects multiple engineering pipelines such as electric power, communication, gas, heat supply, plumbing in an organic whole, is equipped with special access hole, hoist and mount mouth and monitoring system, implements unified planning, unified design, unified construction and management, is the important infrastructure and the lifeline of guarantee city operation.
At present, a common construction method for a shallow-buried open-cut comprehensive pipe gallery is that constructors bind reinforcement cages on site and set up scaffold supporting forms, so that the construction mode needs more constructors to participate, the construction site is more disordered and difficult to manage, and the construction efficiency is lower.
Disclosure of Invention
The invention aims to provide a complete construction method for a comprehensive pipe gallery according to the defects of the prior art, and by designing matched construction equipment to be matched with sectional construction of the comprehensive pipe gallery, the construction quality of the comprehensive pipe gallery is ensured, and meanwhile, the construction efficiency is greatly improved.
The purpose of the invention is realized by the following technical scheme:
a complete set of construction method for a comprehensive pipe gallery is characterized by comprising the following steps: the utility tunnel adopts sectional type construction and comprises the following steps:
a temporary processing factory for a reinforcement cage of a comprehensive pipe gallery is built on a construction site; constructing a foundation and a cushion layer of the comprehensive pipe gallery; transporting the reinforcement cage processed in the temporary processing factory to an excavation site and completing the assembly of the reinforcement cage; pouring bottom plate concrete of the comprehensive pipe gallery, and placing a sliding formwork in place after maintenance is finished; utilizing the slip form machine to finish concrete pouring of the vertical wall and the top plate of the comprehensive pipe gallery, and demolding by the slip form machine after maintenance is finished; and finally, performing waterproof treatment and earthwork backfilling on the construction section.
And the reinforcement cage in the temporary processing factory is turned by using a mould during processing.
The mould is a frame body, the frame body is separated for reinforcing bar cage level portion of placing and the vertical portion of placing of reinforcing bar cage, the length that the portion was placed to the reinforcing bar cage level is greater than the length of the vertical portion of placing of reinforcing bar, the profile shape, the size of the vertical portion of placing of reinforcing bar cage with the identical adaptation of cross sectional shape, size of reinforcing bar cage, the length of the portion is placed to the reinforcing bar cage level with the identical adaptation of shape, size of the length direction of reinforcing bar cage.
The frame body is of a grid-shaped structure matched with the reinforcement cage.
The slip form machine comprises a lower sliding plate, side templates, an angle template and a top template, wherein the two sides of the top template are respectively connected with the angle template, the side templates are arranged below one end part of the angle template, and the lower sliding plate is arranged below the side templates; the lower sliding plate is connected with a lower end oil cylinder and can be driven by the lower sliding plate to lift, the side die plate is connected with a side die opening and closing oil cylinder through a side die opening and closing push rod, the side die plate can be driven by the side die opening and closing oil cylinder to expand outwards or furl inwards, the angle die plate is connected with an angle die opening and closing oil cylinder and can expand outwards or furl inwards under the drive of the angle die opening and closing oil cylinder, and the top die plate is connected with a top die lifting oil cylinder and can lift under the drive of the top die lifting oil cylinder; the lower sliding plate, the side templates, the corner templates and the top template are matched with the inner contour of the comprehensive pipe rack in shape and size after being unfolded respectively.
In both sides be provided with bracing piece and bottom suspension vaulting pole along the direction of height between the side form board, the middle part of going up the bracing piece sets up one the side form open and shut the push rod and the side form hydro-cylinder that opens and shuts, the middle part of bottom suspension vaulting pole sets up another the side form open and shut the push rod and the side form hydro-cylinder that opens and shuts, go up the bracing piece with the bottom suspension vaulting pole can stretch out and draw back under the drive of side form open and shut the push rod.
An upper sliding rail and a slideway are arranged above the upper supporting rod and are connected with the upper supporting rod; and a lower sliding rail and a sliding way are arranged below the lower supporting rod and are connected with the lower supporting rod.
The sliding machine further comprises a bin frame, wheels are arranged at the bottom of the bin frame, the wheels are borne on the track, and the bin frame can move on the track through the driving of a moving motor; the warehouse trolley frame is respectively connected with the lower sliding plate, the side template, the angle template and the top template through corresponding rod bodies.
The storehouse is characterized in that a walking gearbox and a hydraulic station are arranged on the storehouse frame, the walking gearbox is in connection control with the walking motor, and the hydraulic station is respectively connected with a lower end oil cylinder of the lower sliding plate, a side mold opening and closing oil cylinder of the side mold plate, an angle mold opening and closing oil cylinder of the angle mold plate and a top mold lifting oil cylinder of the top mold plate.
The upper area of the bottom of the bin frame is a channel platform.
And the inner sides of the side templates are respectively provided with a vibration motor.
The bottom of the lower sliding plate is provided with a bottom seal.
The invention has the advantages that: the construction speed can be greatly improved, the work of binding the reinforcement cage is finished in a factory, the customized mould has uniqueness, and the slip form machine can be used as a template and can be repeatedly recycled for multiple times.
Drawings
FIG. 1 is a schematic view showing the structure of a slide molding machine according to the present invention;
FIG. 2 is a top view of the inventive clamping fixture;
FIG. 3 is a front view of FIG. 2;
FIG. 4 is a side view of FIG. 2;
FIG. 5 is a first view illustrating a first usage state of the clamping fixture according to the present invention;
FIG. 6 is a second view showing the use state of the clamping fixture of the present invention.
Detailed Description
The features of the present invention and other related features are described in further detail below by way of example in conjunction with the following drawings to facilitate understanding by those skilled in the art:
as shown in fig. 1-6, the labels 1-33 are respectively shown as: lower slide 1, lower extreme hydro-cylinder 2, lower slide rail and slide 3, side form 4, go up bracing piece 5, go up slide rail and slide 6, angle template 7, angle mould open and shut hydro-cylinder 8, cope match-plate pattern 9, square culvert 10, cope match-plate pattern lift hydro-cylinder 11, side form open and shut hydro-cylinder 12, side form open and shut push rod 13, bottom seal 14, lower bracing piece 15, track 16, wheel 17, walking motor 18, walking gearbox 19, hydraulic pressure station 20, little storehouse frame 21, big storehouse frame 22, shock dynamo 23, passageway platform 24, roof and side wall 25, steel sheet pile 26, bottom plate 27, partition wall 28, steel reinforcement cage level portion of placing 29, the vertical portion of placing of steel reinforcement cage 30, the support bar 311, mould 32, steel reinforcement cage 33.
Example (b): the complete construction method for the comprehensive pipe gallery in the embodiment comprises the following steps:
1) the temporary processing factory of the reinforcement cage of the comprehensive pipe gallery is built on a construction site.
2) Constructing a foundation and a cushion layer of the comprehensive pipe gallery; and (4) transporting the reinforcement cage processed in the temporary processing factory to an excavation site and completing the assembly of the reinforcement cage.
During processing, the reinforcement cage is processed and manufactured by using the mold 32 shown in fig. 2-6.
Specifically, the main body of the clamping fixture 32 is a grid-shaped frame body, and is divided into a reinforcement cage horizontal placing part 29 and a reinforcement cage vertical placing part 30 along the length direction of the frame body, wherein the reinforcement cage horizontal placing part 29 is used for placing the reinforcement cage in a horizontal state, and the horizontal state is the using state of the comprehensive pipe rack; the reinforcement cage vertical placement portion 30 is used for vertically placing the reinforcement cage. Close to the setting between reinforcing cage horizontal placement portion 29 and the vertical placement portion 30 of reinforcing cage to make the reinforcing cage can freely overturn between reinforcing cage horizontal placement portion 29 and the vertical placement portion 30 of reinforcing cage, and then be convenient for the processing preparation of reinforcing cage.
Referring to fig. 2 and 5, fig. 4 is a schematic view illustrating a state in which the reinforcement cage 33 is placed on the reinforcement cage vertical placement portion 30. At this moment, the vertical placing part 30 of the reinforcement cage can effectively support the reinforcement cage 33, and ensure the structural stability thereof, and technicians can perform corresponding processing, such as binding and installing processes of embedded parts, on the reinforcement cage 33 in the vertical state. The contour shape and the size of the vertical placing part 30 of the steel reinforcement cage are matched with the cross section shape and the size of the steel reinforcement cage 33, the grid distribution of the steel reinforcement cage is matched with the position of the steel reinforcement of the cross section structure of the steel reinforcement cage 33, and the interference to the processing position of the steel reinforcement cage is avoided on the premise that the steel reinforcement cage 33 is effectively supported.
Similarly, fig. 5 is a schematic view of the reinforcement cage 33 being placed on the reinforcement cage horizontal placement portion 29, as shown in fig. 2 and 6. The outline shape and size of the horizontal placing part 29 of the reinforcement cage are matched with the structural shape and size in the length direction of the reinforcement cage, so that the reinforcement cage 33 placed horizontally is effectively supported.
As shown in fig. 5 and fig. 6, when the mold 32 of the present embodiment is applied, the reinforcement cage 33 may be turned from the horizontal state to the vertical state in fig. 5 to fig. 6, or may be turned from the vertical state to the horizontal state in fig. 6 to fig. 5, so as to realize the free turning of the reinforcement cage 33 on the mold 32, so as to improve the processing accuracy and the processing efficiency of the reinforcement cage 33.
3) After the processing and the transportation of the reinforcement cage are finished, pouring bottom plate concrete of the comprehensive pipe gallery to form a bottom plate 27 shown in figure 1, and placing a sliding formwork in place after the maintenance is finished;
as shown in fig. 1, the slip form machine for comprehensive pipe gallery construction in this embodiment includes a lower sliding plate 1, side formworks 4, angle formworks 7, and a top formwork 9, where two sides of the top formwork 1 are connected with the angle formworks 7 respectively, and the two angle formworks 7 are arranged symmetrically. The lower end parts of the two corner templates 7 are respectively provided with a side template 4, the lower sliding plates 1 are respectively arranged below the two side templates 4, the splicing outlines of the templates are matched with the outline of the space in the pipe gallery of the comprehensive pipe gallery, so that the templates replace the traditional templates supported by the support, and automatic construction is realized.
Specifically, as shown in fig. 1, a lower end cylinder 2 is connected to the lower slide plate 1, and the lower slide plate 1 is vertically movable by the lower end cylinder 2.
An upper supporting rod 5 and a lower supporting rod 15 are arranged between the side formworks 4 on the two sides along the height direction, the middle part of the upper supporting rod 5 is provided with a group of side formwork opening and closing mechanisms consisting of a side formwork opening and closing push rod 13 and a side formwork opening and closing oil cylinder 12, and the middle part of the lower supporting rod 15 is provided with another group of side formwork opening and closing mechanisms consisting of a side formwork opening and closing push rod 13 and a side formwork opening and closing oil cylinder 12. The two ends of the upper support rod 5 and the lower support rod 15 are respectively connected and fixed with the side formworks 4 on the two sides, and the upper support rod 5 and the lower support rod 15 can be driven to stretch and retract by the side formwork opening and closing push rod 13 under the driving of the corresponding side formwork opening and closing oil cylinder 12, so that the side formworks 4 can be unfolded outwards or folded in the box.
As shown in fig. 1, an upper slide rail and a slideway 6 are arranged above the upper support rod 5, and the upper slide rail and the slideway 6 are connected with the upper support rod 5 so as to improve the stability of the upper support rod 5 when extending outwards; similarly, a lower slide rail and a slide way 3 are arranged below the lower support rod 15, and the lower slide rail and the slide way 3 are connected with the lower support rod 15 so as to improve the stability of the lower support rod 15 when the lower support rod extends outwards.
As shown in fig. 1, the angle form 7 is connected with an angle form opening and closing cylinder 8 and can be driven by the angle form opening and closing cylinder 8 to be unfolded outwards or folded inwards, at this time, the angle form can be folded inwards, that is, the angle form is driven by the angle form opening and closing cylinder 8 to rotate for a certain angle, so that the angle form is folded at the side of the side form 4, the space occupied by the whole slip form machine is reduced, and the integration is improved.
As shown in fig. 1, the top die plate 9 is connected to a top die lift cylinder 11 and can be lifted and lowered by the top die lift cylinder 11.
As shown in fig. 1, the sliding form machine further includes a bin frame, which is divided into a small bin frame 21 and a large bin frame 22 measured in the figure, the size of the two bin frames is matched with the size of the space in the pipe gallery of the utility tunnel, i.e. the space in the pipe gallery on the left side of the figure is smaller than the space in the pipe gallery on the right side of the figure, but the two bin frames 21 and the large bin frame 22 have the same function, i.e. they are used as a main body supporting structure of the sliding form machine, and corresponding templates or functional devices are installed on the bin frames through corresponding connecting rods or connecting pieces. Wheels 17 are arranged at the bottom of the warehouse carriage, the wheels 17 are carried on the rails 16, and the small warehouse carriage 21 or the large warehouse carriage 22 can walk on the rails 16 through the driving of the walking motors 18. A walking gearbox 19 and a hydraulic station 20 are arranged on the warehouse frame, wherein the walking gearbox 19 is connected with a walking motor 18 for controlling the walking speed of the whole slip-form machine, and the hydraulic station 20 is respectively connected with oil cylinders for driving all templates to act so as to provide power for the work of the slip-form machine, and comprises a lower end oil cylinder 2 of the lower sliding plate 1, a side mold opening and closing oil cylinder 12 of the side mold plate 4, an angle mold opening and closing oil cylinder 8 of the angle mold plate 7 and a top mold lifting oil cylinder 11 of the top mold plate 9.
In order to facilitate the construction of the technician, as shown in fig. 1, the areas above the bottoms of the small-warehouse carriage 21 and the large-warehouse carriage 22 can be used as passage platforms for the technician to walk.
As shown in fig. 1, the inner sides of the sideforms 4 at both sides are respectively provided with a vibration motor 23, and the vibration motor 23 can generate a certain vibration after concrete pouring is completed to facilitate demoulding.
As shown in fig. 1, a bottom seal 14 is provided at the bottom end of the lower slide 1, and the bottom seal 14 is used for sealing during construction to prevent concrete from flowing into the working area of the slide machine and causing adverse effects.
①, building a wall on the inner side of the steel sheet pile 26 to form a partition wall 28 by using an off-wall enclosure-Larsen steel sheet pile;
②, hoisting two prefabricated steel reinforcement cages to the specified position, so that the two steel reinforcement cages can be lapped to meet the force transmission;
③ pouring the bottom plate 27, after the concrete reaches a certain strength, laying the running track 16 of the slip-form machine, and positioning the slip-form machine;
④ putting down the lower slide plate 1 of the slide molding machine, and using the bottom seal 14 at the bottom of the lower slide plate 1 to make the lower slide plate 1 and the poured bottom plate 27 joint to prevent slurry leakage;
⑤, controlling the top template 9, the angle template 7 and the side template 4 of the sliding mould machine by using the hydraulic station 20, jacking the side template 4 and the angle template 7, and stopping when the distance between the side template and the reinforcement cage meets the thickness of the reinforcement protection layer;
⑥ pouring the top and side walls 25 of the pipe gallery with the steel mould and the outer brick wall of the slip-casting machine as the template;
4) and (4) utilizing a slip-form machine to finish the concrete pouring of the side wall and the top plate of the comprehensive pipe gallery, and demoulding by the slip-form machine after the maintenance is finished.
And (3) forming a square culvert 10 after the concrete on the side wall and the top plate reaches the strength capable of being demoulded by adopting a steam curing mode, lifting the lower sliding plate 1, the side closing template 4, the folding angle template 7 and the top descending template 9 by the sliding formwork machine, and driving the sliding formwork to integrally walk by a walking motor 18 after a series of actions so as to enter the next construction section.
5) And finally, performing waterproof treatment and earthwork backfilling on the construction section.
In the embodiment, in specific implementation: be provided with support bar 31 between reinforcing bar cage horizontal placement portion 29 and the vertical placement portion 30 of reinforcing bar cage, this support bar 31 mainly used improves joint strength and wholeness between reinforcing bar cage horizontal placement portion 29 and the vertical placement portion 30 of reinforcing bar cage to guarantee the result of use.
In order to facilitate the overturning of the reinforcement cage 33 on the mold 32, components with sliding surfaces, such as guide wheels, are arranged at adjacent positions between the horizontal placing part 29 of the reinforcement cage and the vertical placing part 30 of the reinforcement cage, so that the overturning operation of the reinforcement cage 33 is more convenient, and the processing efficiency of the reinforcement cage 33 is further improved.
Although the conception and the embodiments of the present invention have been described in detail with reference to the drawings, those skilled in the art will recognize that various changes and modifications can be made therein without departing from the scope of the appended claims, and therefore, they are not to be considered repeated herein.
Claims (4)
1. A complete set of construction method for a comprehensive pipe gallery is characterized by comprising the following steps: the utility tunnel adopts sectional type construction and comprises the following steps:
a temporary processing factory for a reinforcement cage of a comprehensive pipe gallery is built on a construction site; constructing a foundation and a cushion layer of the comprehensive pipe gallery; transporting the reinforcement cage processed in the temporary processing factory to an excavation site and completing the assembly of the reinforcement cage; pouring bottom plate concrete of the comprehensive pipe gallery, and placing a sliding formwork in place after maintenance is finished; utilizing the slip form machine to finish concrete pouring of the vertical wall and the top plate of the comprehensive pipe gallery, and demolding by the slip form machine after maintenance is finished; and finally, performing waterproof treatment and earthwork backfilling on the construction section.
2. The complete construction method for the comprehensive pipe gallery according to claim 1, characterized in that: and the reinforcement cage in the temporary processing factory is turned by using a mould during processing.
3. The complete construction method for the comprehensive pipe gallery according to claim 2, characterized in that: the mould is a frame body, the frame body is separated for reinforcing bar cage level portion of placing and the vertical portion of placing of reinforcing bar cage, the length that the portion was placed to the reinforcing bar cage level is greater than the length of the vertical portion of placing of reinforcing bar, the profile shape, the size of the vertical portion of placing of reinforcing bar cage with the identical adaptation of cross sectional shape, size of reinforcing bar cage, the length of the portion is placed to the reinforcing bar cage level with the identical adaptation of shape, size of the length direction of reinforcing bar cage.
4. The complete construction method for the comprehensive pipe gallery according to claim 1, characterized in that: the slip form machine comprises a lower sliding plate, side templates, an angle template and a top template, wherein the two sides of the top template are respectively connected with the angle template, the side templates are arranged below one end part of the angle template, and the lower sliding plate is arranged below the side templates; the lower sliding plate is connected with a lower end oil cylinder and can be driven by the lower sliding plate to lift, the side die plate is connected with a side die opening and closing oil cylinder through a side die opening and closing push rod, the side die plate can be driven by the side die opening and closing oil cylinder to expand outwards or furl inwards, the angle die plate is connected with an angle die opening and closing oil cylinder and can expand outwards or furl inwards under the drive of the angle die opening and closing oil cylinder, and the top die plate is connected with a top die lifting oil cylinder and can lift under the drive of the top die lifting oil cylinder; the lower sliding plate, the side templates, the corner templates and the top template are matched with the inner contour of the comprehensive pipe rack in shape and size after being unfolded respectively.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010070345.XA CN111139868B (en) | 2020-01-21 | 2020-01-21 | Complete construction method for comprehensive pipe gallery |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010070345.XA CN111139868B (en) | 2020-01-21 | 2020-01-21 | Complete construction method for comprehensive pipe gallery |
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| CN111139868A true CN111139868A (en) | 2020-05-12 |
| CN111139868B CN111139868B (en) | 2022-03-01 |
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| CN111730727A (en) * | 2020-06-19 | 2020-10-02 | 中交第三航务工程局有限公司 | Manufacturing method of vertical prefabricated template of underground comprehensive pipe gallery |
| CN111958781A (en) * | 2020-08-18 | 2020-11-20 | 郑州大学 | Auxiliary forming device for prefabricated section beam |
| CN112647436A (en) * | 2020-12-18 | 2021-04-13 | 浙江世润建创科技发展有限公司 | Porous cast-in-situ box culvert bottom plate and construction method |
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| CN111730727A (en) * | 2020-06-19 | 2020-10-02 | 中交第三航务工程局有限公司 | Manufacturing method of vertical prefabricated template of underground comprehensive pipe gallery |
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| Publication number | Publication date |
|---|---|
| CN111139868B (en) | 2022-03-01 |
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