Prefabricated assembled UHPC drainage ditch structure and construction method thereof

Abstract

The application discloses a construction method of a prefabricated assembled UHPC drainage ditch structure, and comprises the following steps: step one, prefabricated UHPC side plates are made through matched molds; step two, cover plates are made through matched molds; step three, the drainage ditch is excavated after line laying; step four, the prefabricated UHPC side plates and the cover plates are transported; step five, the prefabricated UHPC side plates are installed at elevations; step six, cast-in-situ concrete bottom plates are formed at the bottoms between the installed side plates; step seven, the prefabricated UHPC side plates are roughened, and concrete construction is carried out between the drainage ditch segments; and step eight, the cover plates are installed; the application saves the amount of concrete, saves the engineering cost, is reasonable in structure, higher in strength, stronger in practicality, convenient in construction, and can fully play the mechanical properties of the ultra-high performance concrete.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of drainage ditch construction, in particular to a prefabricated and assembled UHPC drainage ditch structure and a construction method thereof. BACKGROUND

[0002] Traditional drainage ditches are generally made of cast-in-place concrete, prefabricated concrete, and mortar rubble, etc. Due to the small volume and many corners of the cast-in-place concrete drainage ditch structure, it is difficult to guarantee the construction quality by erecting formwork on site for pouring, and problems such as rough surface of the side groove, poor drainage, debris accumulation, cracking and corner defects often occur. Moreover, the construction efficiency is low, labor is consumed, and the construction period is long. The ordinary concrete prefabricated drainage ditch generally has a large volume, and in order to ensure the strength of the structure, the component groove wall is usually thick, which wastes a large amount of concrete, resulting in low production efficiency in the factory, and is greatly affected by transportation and hoisting conditions. SUMMARY

[0003] The present application aims to provide a construction method of a prefabricated and assembled UHPC drainage ditch structure to solve the above technical problems.

[0004] To achieve the above-mentioned purpose, the present application provides the following technical scheme: a construction method of a prefabricated and assembled UHPC drainage ditch structure, which comprises the following steps:

[0005] Step one: prefabricated UHPC side plate production: design the parameters of the UHPC side plate to produce a matching mold; place the steel mesh in the prepared mold and pour the ultra-high performance concrete into the mold to produce the UHPC side plate; after the UHPC side plate is formed, remove the mold and steam the formed UHPC side plate.

[0006] Step two: cover plate production: place the steel mesh on the positioning frame and then put it into the matching mold, hang the steel mesh on the mold, remove the positioning frame after the concrete is poured, and then maintain it, and demold after the maintenance is completed.

[0007] Step three: drainage ditch excavation: according to the size of the drainage ditch, the center line and the two side lines are drawn, and the drainage ditch is excavated after the depth is determined.

[0008] Step four: prefabricated UHPC side plate and cover plate transportation: use a transport vehicle to transport the prefabricated UHPC side plate and cover plate to the construction site, and after being transported to the site, place the prefabricated UHPC side plate and cover plate in the prefabricated component storage yard.

[0009] Step five: installation of prefabricated UHPC side plates: position the line along the direction of the drainage ditch, use hoisting equipment to place the first prefabricated UHPC side plate into the foundation groove, then adjust the height of the prefabricated UHPC side plate according to the measured elevation to make the prefabricated UHPC side plate consistent with the elevation of the drainage ditch, complete the positioning of the starting section, and after positioning is completed, the subsequent prefabricated UHPC side plates are hoisted to the corresponding positions in sequence and the elevations are adjusted.

[0010] Step six: construction of the cast-in-place concrete bottom plate of the drainage ditch: the contact surface of the prefabricated UHPC side plate and the cast-in-place concrete bottom plate is chiseled; the outer straight reinforcement of the prefabricated UHPC side plate is bound with the bottom plate structure reinforcement, and the concrete is poured, vibrated, troweled and cured.

[0011] Step seven: construction of the concrete between the sections of the drainage ditch: the surface of the prefabricated UHPC side plate at the transverse two ends is chiseled; longitudinal reinforcing steel bars are arranged and bound in the overlapping area of the first ring-shaped reinforcing steel bars, and the concrete is poured, vibrated, troweled and cured.

[0012] Step eight: installation of the cover plate: hoist the cover plate and install it with the inner side slot of the prefabricated UHPC side plate on both sides aligned.

[0013] Preferably, the construction sequence of step six and step seven can be exchanged, and in step six, a second ring-shaped closed reinforcing steel bar can be arranged between the two first ring-shaped reinforcing steel bars, and longitudinal reinforcing steel bars can be arranged in the overlapping area of the second ring-shaped closed reinforcing steel bar and the first ring-shaped reinforcing steel bar.

[0014] A prefabricated and assembled UHPC drainage ditch structure constructed by the above construction method.

[0015] Compared with the prior art, the beneficial effects of the present application are:

[0016] By prefabricating the UHPC side plate and the cover plate in advance, transportation is facilitated, engineering cost is saved, the bottom plate is cast in place after being installed and positioned in the prefabricated UHPC side plate, the amount of concrete is saved, the structure is reasonable, the strength is higher, the practicality is strong, the construction is convenient, and the mechanical properties of the ultra-high performance concrete can be fully utilized. BRIEF DESCRIPTION OF DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creating any inventive labor.

[0018] Fig. 1 is the construction process diagram of the drainage ditch of the present embodiment

[0019] Fig. 2is a schematic view highlighting the gutter structure of the present embodiment;

[0020] Fig. 3 is a schematic view highlighting the connection of the first ring-shaped reinforcement and the second ring-shaped reinforcement of the present embodiment.

[0021] In the drawings, the components represented by each reference numeral are listed as follows:

[0022] 1, prefabricated UHPC side plate; 2, cover plate; 3, bottom plate; 4, first ring-shaped reinforcement; 5, second ring-shaped reinforcement. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative labor fall within the scope of protection of the present application.

[0024] Please refer to Figs. 1-3 The present application provides a technical solution: a construction method of a prefabricated assembled UHPC gutter structure, which comprises the following steps:

[0025] Step one: prefabricated UHPC side plate manufacturing: the factory designs the parameters of the UHPC side plate according to the actual demand to make the matching mold; the reinforcement mesh is placed in the made mold and the ultra-high performance concrete is poured into the mold to make the UHPC side plate; after the UHPC side plate is formed, the mold is removed and the formed UHPC side plate is steamed.

[0026] Step two: cover plate manufacturing: bind the cover plate 2 reinforcement mesh sheet, after binding, place the reinforcement mesh sheet on the positioning frame and then put it into the matching mold, ensure that the protective layer of the reinforcement does not change during the concrete pouring process, then hang the reinforcement mesh sheet on the mold, after the concrete pouring is completed, take down the positioning frame for curing, and after the curing is completed, demold.

[0027] Step three: the center line position of the gutter is laid out, then the side lines of the gutter foundation are laid out according to the size of the gutter, the excavation depth is determined, and mechanical excavation or manual excavation can be used. When the foundation pit is excavated to the designed elevation and size, the base and the side surface should be promptly trimmed and tamped.

[0028] Step four: transport the prefabricated UHPC side plate 1 and the cover plate 2 to the construction site by using a transport vehicle. After being transported to the site, the prefabricated UHPC side plate 1 and the cover plate 2 are placed in the prefabricated component storage yard. A shock-absorbing rubber pad is laid on the transport vehicle in advance. After the prefabricated UHPC side plate 1 and the cover plate 2 are loaded, they should be fixed and the fixing condition should be checked. If the transportation requirements are met, the prefabricated UHPC side plate 1 and the cover plate 2 are transported to the construction site.

[0029] Step five: installation of the prefabricated UHPC side plate. Position along the drainage ditch direction. After the first prefabricated UHPC side plate 1 is placed into the foundation groove using hoisting equipment, adjust the height of the prefabricated UHPC side plate 1 according to the measured elevation to make the prefabricated UHPC side plate 1 consistent with the elevation of the drainage ditch. Complete the positioning of the starting segment. After positioning is completed, the subsequent prefabricated UHPC side plate 1 is hoisted to the corresponding position and the elevation is adjusted. The appropriate hoisting method is used during installation.

[0030] Step six: construction of the drainage ditch channel cast-in-place concrete bottom plate. The contact surface between the prefabricated UHPC side plate 1 and the cast-in-place concrete bottom plate 3 is chiseled. The chiseling should not be too deep, and the steel fibers in the UHPC should be exposed. The outer straight reinforcement of the prefabricated UHPC side plate 1 is bound with the bottom plate 3 structure reinforcement. The concrete is poured and vibrated, and the surface is finished and maintained.

[0031] Step seven: concrete construction between drainage ditch channel segments. The surface of the prefabricated UHPC side plate 1 at the transverse two ends is chiseled. The chiseling should not be too deep, and the steel fibers in the UHPC should be exposed. Longitudinal reinforcing steel bars are arranged and bound in the overlapping area of the first ring-shaped steel bar 4. The concrete is poured and vibrated, and the surface is finished and maintained.

[0032] Step eight: installation of the cover plate. Hoist the cover plate 2 and install it by aligning the cover plate 2 on both sides with the inner side slot of the prefabricated UHPC side plate 1.

[0033] Specifically, steps six and seven can be swapped in construction order. In step six, a second ring-shaped closed steel bar can be arranged between two first ring-shaped steel bars 4, and longitudinal reinforcing steel bars can be arranged in the overlapping area of the second ring-shaped closed steel bar and the first ring-shaped steel bar 4.

[0034] A prefabricated assembled UHPC drainage ditch structure is constructed by the above construction method. The constructed drainage ditch structure is composed of multiple groups of prefabricated UHPC side plates 1, cover plates 2, and bottom plates 3.

[0035] In the description of the application, it is to be understood that the terms "coaxial", "bottom", "one end", "top", "middle", "the other end", "upper", "one side", "top", "inner", "front", "central", "both ends" and the like indicate the orientation or positional relationship based on the drawings, and are only for the convenience of describing the application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the application.

[0036] In the present application, unless otherwise explicitly specified and limited, the terms "mounting", "setting", "connecting", "fixing", "screwed" and the like should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise explicitly limited, and those skilled in the art can understand the specific meaning of the above-mentioned terms in the present application according to the specific circumstances.

[0037] Although embodiments of the application have been shown and described, those skilled in the art can understand that modifications can be made to these embodiments without departing from the principles and spirit of the application, and the scope of the application is defined by the appended claims and their equivalents.

Claims

1.A construction method of a prefabricated assembled UHPC drainage ditch structure, characterized in that: the construction method comprises the following steps: Step 1: prefabricated UHPC side plate production: design the parameters of the UHPC side plate to produce a matched mold; place the steel mesh in the prepared mold and pour the ultra-high performance concrete into the mold to produce the UHPC side plate; after the UHPC side plate is formed, remove the mold and steam the formed UHPC side plate; Step 2: cover plate production: place the steel mesh on the positioning frame and then put it into the matched mold, hang the steel mesh on the mold, take down the positioning frame after the concrete is poured, and then perform maintenance, and after the maintenance is completed, perform demolding; Step 3: drainage ditch excavation: according to the center line and the two side lines, determine the depth of the drainage ditch and then excavate; Step 4: prefabricated UHPC side plate and cover plate transportation: use a transport vehicle to transport the prefabricated UHPC side plate (1) and cover plate (2) to the construction site, and after being transported to the site, place the prefabricated UHPC side plate (1) and cover plate (2) in the prefabricated component storage yard; Step 5: prefabricated UHPC side plate installation: position along the drainage ditch direction, use hoisting equipment to put the first prefabricated UHPC side plate (1) into the foundation groove, adjust the height of the prefabricated UHPC side plate (1) according to the measured elevation, make the prefabricated UHPC side plate (1) consistent with the elevation of the drainage ditch, complete the positioning of the starting section, and after the positioning is completed, sequentially hoist the subsequent prefabricated UHPC side plate (1) to the corresponding position and adjust the elevation; Step 6: drainage ditch concrete bottom plate construction: chisel the contact surface between the prefabricated UHPC side plate (1) and the cast-in-place concrete bottom plate (3); bind the outer straight reinforcement of the prefabricated UHPC side plate (1) and the bottom plate (3) structure reinforcement, pour the concrete and perform vibration, troweling and curing; Step 7: concrete construction between drainage ditch sections: chisel the surface of the two ends of the prefabricated UHPC side plate (1) in the transverse direction; arrange and bind the longitudinal reinforcing steel bars in the overlapping area of the first ring-shaped steel bars (4), pour the concrete and perform vibration, troweling and curing; Step 8: cover plate installation: hoist the cover plate (2) and install the cover plate (2) on both sides of the prefabricated UHPC side plate (1) respectively. In step 6, the second ring-shaped closed steel bars are arranged between the two first ring-shaped steel bars (4), and the longitudinal reinforcing steel bars are arranged in the overlapping area of the second ring-shaped closed steel bars and the first ring-shaped steel bars (4). 3.A prefabricated assembled UHPC drainage ditch structure, which is constructed by the construction method of the prefabricated assembled UHPC drainage ditch structure according to any one of claims 1-2, and is composed of a plurality of groups of prefabricated UHPC side plates (1), cover plates (2) and bottom plates (3). ​ ​ ​ ​ ​ ​ ​ 2. The construction method of a precast assembled UHPC drainage ditch structure according to claim 1, characterized in that: ​ ​

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