Method and device for finishing the concrete surface of a foundation pile

Abstract

The present invention discloses a method and device for finishing a cap concrete surface, and relates to the field of building construction technology. The method comprises the following steps: constructing a construction platform on the top surface of the cap, and installing a finishing guide mechanism between the top surface of the cap and the construction platform; pouring and vibrating the cap concrete, and leaving it to stand for a first period of time; setting a finishing route for zoned construction based on the constructed construction platform, moving a scraper on the finishing guide mechanism, and performing a first finishing; after the cap is poured for a second period of time, performing a second finishing of the cap concrete in the same manner as the first finishing; and before the concrete initially sets, performing a third finishing of the cap concrete using a slurry collecting machine. The present invention facilitates construction work for workers, improves construction efficiency, and can ensure the flatness of the concrete surface, reducing the probability of cracking, fissures, or unevenness of the concrete.

Description

Technical Field

[0001] The present invention relates to the technical field of building construction, and in particular to a device and method for finishing the surface of a foundation concrete. Background Art

[0002] With the development of road and bridge construction, the number of bridge construction projects is increasing and the amount of projects is getting larger and larger, and the quality requirements for bridges are also increasing.

[0003] The cap is a crucial structure in a bridge. Designed to bear and distribute the loads transmitted by the pier, it's a reinforced concrete platform installed atop the pile foundation, connecting the tops of the piles. The quality of the cap directly impacts the overall quality of the bridge. Finishing the cap concrete is a crucial finishing step during construction. Improper finishing can cause cracks on the cap concrete surface, impacting the overall structural quality. Summary of the Invention

[0004] In response to the shortcomings of the prior art, the present invention, in its first aspect, provides a method for finishing the concrete surface of a cap, which facilitates construction workers, improves construction efficiency, ensures the flatness of the concrete surface, and reduces the chances of cracking, fissures, or unevenness in the concrete.

[0005] In order to achieve the above purpose, the technical solution adopted by the present invention is:

[0006] A method for finishing a cap concrete surface, the method comprising the following steps:

[0007] Build a construction platform on the top surface of the pedestal and install a surface guide mechanism between the top surface of the pedestal and the construction platform;

[0008] Carry out the pouring and vibrating of the foundation concrete and let it stand for the first period;

[0009] Based on the built construction platform, set the finishing route for the partitioned construction, move the scraper on the finishing guide mechanism, and perform the first finishing;

[0010] After the second period of pouring of the cap is completed, the second finishing of the cap concrete is carried out in the same way as the first finishing;

[0011] Before the initial setting of the concrete, a slurry collecting machine is used to finish the foundation concrete for the third time.

[0012] In some embodiments, the step of constructing a construction platform on the top surface of the platform includes:

[0013] Fix multiple vertical steel bars to the steel mesh in the tower base area, and fix horizontal steel bars to the vertical steel bars;

[0014] A sleeve is installed on the top of each vertical steel bar, and multiple sleeves are connected with steel pipes to form a vertical support system for the construction platform;

[0015] Arrange multiple construction platform support plates along the construction area of the cap concrete, install one end of each support plate on the top of the cap formwork, and install the other end on the vertical support system.

[0016] In some embodiments, the step of installing a surface guide mechanism between the top surface of the pedestal and the construction platform includes:

[0017] Fix the supporting steel bars of the surface guide mechanism on the steel mesh, and bend the supporting steel bars into a horse stool shape;

[0018] Install the positioning channel steel of the surface guide mechanism on the supporting steel bars.

[0019] In some embodiments, when performing the second finishing of the foundation pile concrete, a construction-while-disassembly method is adopted, whereby the construction platforms are disassembled one by one and traces of the disassembly of the construction platforms are smoothed out.

[0020] In some embodiments, after the slurry collecting machine is used to finish the foundation concrete for the third time, the step of using a wooden trowel to smooth the entire surface is also included.

[0021] In some embodiments, the step of curing the top surface of the platform is further included, which includes:

[0022] For the area outside the tower base, lay a layer of plastic film, a layer of geotextile and a layer of thermal insulation blanket for maintenance;

[0023] For the area within the tower base, wooden baffles are installed on the edge of the tower base, and the top surface of the pedestal in the tower base area is roughened. After the roughening is completed, the top surface of the pedestal in the tower base area is stored with water for maintenance.

[0024] The second aspect of the present invention provides a foundation concrete finishing device, which is beneficial to construction workers, improves construction efficiency, and can ensure the flatness of the concrete surface, reducing the probability of concrete cracking, cracks or unevenness.

[0025] In order to achieve the above purpose, the technical solution adopted by the present invention is:

[0026] A cap concrete finishing device, comprising:

[0027] A construction platform comprising a vertical support system and a support plate for being arranged on the top surface of the cap;

[0028] a surface collecting guide mechanism, which is used to be arranged on the top surface of the foundation and located below the construction platform; and

[0029] The scraper is arranged on the surface collecting guide mechanism and can move back and forth along the surface collecting guide mechanism.

[0030] In some embodiments, the vertical support system includes:

[0031] a plurality of vertical steel bars fixed to the steel mesh in the tower base area;

[0032] a plurality of horizontal steel bars fixed to the vertical steel bars;

[0033] A plurality of sleeves, each of the sleeves being fixed on one of the vertical steel bars;

[0034] A plurality of steel pipes are fixed on the plurality of casings to connect the plurality of casings.

[0035] In some embodiments, the face collecting guide mechanism includes:

[0036] Support steel bars, which are fixed to the steel mesh in the tower base area;

[0037] Positioning channel steel, which is installed on the supporting steel bars.

[0038] In some embodiments, the supporting steel bars are in the shape of horse stools.

[0039] Compared with the prior art, the advantages of the present invention are:

[0040] The method for finishing the pedestal concrete in the present invention allows workers to move freely on the pedestal concrete by building a construction platform on the top surface of the pedestal, which is beneficial for workers to work and improves construction efficiency. The installed finishing guide mechanism not only improves the accuracy of leveling during the finishing work and improves the construction quality, but also can control the slope of the concrete on the top of the pedestal, making it convenient for the pedestal to drain. In addition, the finishing construction is carried out three times in the initial setting stage, the mid-term stage and the basic solidification stage of the concrete, which effectively guarantees the flatness of the concrete surface and greatly reduces the probability of cracking, cracks or unevenness of the concrete. The finishing construction adopts simultaneous construction in different areas, which shortens the construction time without affecting the construction quality, not only improving the construction efficiency, but also ensuring that the finishing is completed within the optimal finishing time period. In addition, different maintenance methods are divided for the pedestal concrete in different areas, fully considering the impact of different external environments on the quality of concrete, and further ensuring the quality of concrete. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] Figure 1 This is a flow chart of a method for finishing a cap concrete surface in an embodiment of the present invention;

[0042] Figure 2 yes Figure 1 Flowchart of step S1 in FIG.

[0043] Figure 3 yes Figure 1 Flowchart of step S2 in FIG.

[0044] Figure 4 Schematic diagram of zoning construction in an embodiment of the present invention;

[0045] Figure 5 2. It is a structural schematic diagram of a cap concrete finishing device according to an embodiment of the present invention;

[0046] Figure 6 This is a schematic structural diagram of a construction platform according to an embodiment of the present invention;

[0047] Figure 7 This is a schematic structural diagram of a dough collection guide mechanism according to an embodiment of the present invention;

[0048] Figure 8 Schematic diagram of the structure of the vertical support system in an embodiment of the present invention;

[0049] Figure 9 is another structural schematic diagram of the vertical support system in an embodiment of the present invention;

[0050] Figure 10 It is a schematic diagram of the maintenance of the top surface of the pedestal in an embodiment of the present invention.

[0051] In the figure: 1. Construction platform; 11. Vertical support system; 111. Vertical steel bars; 112. Horizontal steel bars; 113. Casing; 114. Steel pipe; 12. Support plate; 2. Surface guide mechanism; 21. Support steel bars; 22. Positioning channel steel; 23. Angle steel; 3. Scraper; 4. Steel mesh; 5. Base formwork; 6. Wooden baffle. DETAILED DESCRIPTION

[0052] The following is a further detailed description of the technical solutions of the present invention (including preferred technical solutions) by means of the accompanying drawings and by listing some optional embodiments of the present invention. Obviously, the embodiments described are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0053] In the description of this application, it should be noted that the terms "upper" and "lower" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application. Unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be internal communication between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0054] Furthermore, in this application, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of additional identical elements in the process, method, article, or apparatus comprising the element.

[0055] See also Figure 1 As shown, an embodiment of the present invention discloses a method for finishing a pile cap concrete surface, the method comprising the following steps:

[0056] S1. Build a construction platform 1 on the top surface of the foundation.

[0057] Traditional finishing methods are inconvenient for construction workers on the cap, which may affect construction time and quality. To address this problem, the embodiment of the present invention first builds a construction platform 1 on the top surface of the cap. The construction platform 1 is built on the cap concrete and mainly includes a vertical support system 11 and a support plate 12. Its function is to provide workers with a convenient, safe and reliable platform for finishing operations.

[0058] That is to say, the construction platform 1 mainly involves the construction of the vertical support system 11 and the support plate 12. Figure 2 As shown, in a specific implementation, step S1 includes:

[0059] S11 . Fix a plurality of vertical steel bars 111 on the steel mesh 4 in the tower base area, and fix horizontal steel bars 112 on the vertical steel bars 111 .

[0060] S12 . Install a sleeve 113 on the top of each vertical steel bar 111 , and connect multiple sleeves 113 using steel pipes 114 to form the vertical support system 11 of the construction platform 1 .

[0061] The structure of the construction platform 1 can be seen in Figures 5 to 9 The vertical support system 11 primarily consists of steel pipes 114, sleeves 113, vertical bars 111, and horizontal bars 112. The vertical bars 111 are welded to the steel mesh 4 in the tower base area, spaced 2 meters apart. Horizontal bars 112 are welded to the designed locations of the vertical bars 111. Sleeves 113 are welded every 2 meters along the length of the steel pipes 114. Finally, the sleeves 113 are installed on the vertical bars 111 to form the vertical support system 11.

[0062] S13. Arrange multiple support plates 12 of the construction platform 1 along the construction area of the cap concrete, install one end of each support plate 12 on the top of the cap formwork 5, and install the other end on the vertical support system 11.

[0063] After the vertical support system 11 is installed, the support plates 12 can be laid. The support plates 12 are mainly used to support the workers and facilitate their movement within the construction area. The support plates 12 can be arranged horizontally or vertically along the construction area to form an integrated support network system.

[0064] S2. Install the surface guide mechanism 2 between the top surface of the foundation and the construction platform 1.

[0065] After the construction platform 1 is installed, the surface collecting guide mechanism 2 can be installed. The structure of the surface collecting guide mechanism 2 can be seen in Figure 7 The surface finishing guide mechanism 2 includes supporting steel bars 21, positioning channel steels 22 and angle steels 23, and its function is to enable the scraper 3 to effectively ensure the smoothness and slope of the surface when working on the surface finishing guide mechanism 2.

[0066] See also Figure 3 As shown, step S2 specifically includes:

[0067] S21. Fix the supporting steel bars 21 of the surface-closing guide mechanism 2 on the steel mesh 4, and bend the supporting steel bars 21 into a horse stool shape.

[0068] S22. Install the positioning channel steel 22 of the surface-closing guide mechanism 2 on the supporting steel bar 21.

[0069] It is worth noting that the angle steel 23 mainly plays an auxiliary positioning role. It is installed on the base formwork 5 and the model is ∠50×4mm. The bottom surface of the angle steel 23 is the height control surface of the concrete edge. The angle of the angle steel 23 is corrected to 89°. Then, the wire is pulled along the bottom of the angle steel through two positioning steel grooves to determine its elevation, thereby controlling the installation slope of the scraper 3. After the first surface finishing, the slope of the concrete at the top of the base is set to 1°.

[0070] S3. Pour and vibrate the foundation concrete and let it stand for the first period of time.

[0071] S4. Based on the constructed construction platform 1, set the finishing route for the partitioned construction, move the scraper 3 on the finishing guide mechanism 2, and perform the first finishing.

[0072] The first finishing requires the use of the finishing guide mechanism 2 and the scraper 3 to level and adjust the concrete surface and to achieve a composite elevation with an error within 5 mm.

[0073] See also Figure 4 As shown, large caps require extensive finishing. If construction takes too long, the unfinished concrete will continue to harden, impacting finishing quality. To optimize the timing for the first finishing and improve construction efficiency, a zoning system was implemented, dividing the finishing work into two areas. This reduced construction time by 50% without compromising quality, improving efficiency and ensuring completion within the optimal finishing timeframe.

[0074] S5. After the second duration of pouring of the pedestal, the second finishing of the pedestal concrete is carried out in the same manner as the first finishing.

[0075] In order to save construction time and improve construction efficiency, the second finishing construction adopts the method of disassembly while construction, disassembling the construction platform 1 one by one, taking out the steel pipe 114 and sleeve 113 in the vertical support system 11 of the construction platform, and smoothing out the dents of the sleeve 113 to ensure smoothness and beauty. Finally, after the second finishing is completed, the finishing guide mechanism 2 is disassembled as a whole as soon as possible.

[0076] S6. Before the initial setting of the concrete, use a slurry collecting machine to finish the foundation concrete for the third time.

[0077] The third finishing step is performed before the concrete begins to set. A mortar collector is used to finish the surface. After the mortar collector finishes, the surface is smoothed over with a wooden trowel. After the third finishing step, the concrete surface must be flat and smooth, free of shrinkage cracks, and maintain a high visual quality. The top surface flatness should be within 10mm.

[0078] It's worth noting that the present invention employs a three-step finishing process. The first finishing step occurs 3-4 hours after pouring, which is the first resting period. The second finishing step occurs approximately 8 hours after pouring, which is the second period mentioned above. The third finishing step occurs before the concrete has substantially solidified, approximately 14-15 hours after pouring. This three-step finishing process, performed at the initial, mid-stage, and substantial setting stages of the concrete, effectively ensures the flatness of the concrete surface and significantly reduces the likelihood of cracking, fissures, or unevenness.

[0079] In addition, some embodiments further include a step of curing the top surface of the platform, which includes:

[0080] For the area outside the tower base, a layer of plastic film, a layer of geotextile and a layer of thermal insulation blanket are laid for maintenance; for the area inside the tower base, wooden baffles are installed on the edge of the tower base, and the top surface of the pedestal in the tower base area is roughened. After the roughening is completed, the top surface of the pedestal in the tower base area is stored with water for maintenance.

[0081] Specifically, see Figure 10 As shown, for the area inside the tower base, a 30 cm high wooden baffle 6 is first installed on the edge of the tower base, and the top surface of the tower base area is artificially roughened. After the roughening is completed, the top surface of the pedestal in the tower base area is directly stored with water for maintenance. The water storage height is 20 cm, and circulating water is used for water storage. The water temperature is within 20°C of the internal temperature of the pedestal according to the temperature control instruction requirements.

[0082] Therefore, different maintenance methods are divided for the foundation concrete in different areas, fully considering the impact of different external environments on the quality of concrete, and further ensuring the quality of concrete.

[0083] In summary, the method for finishing the pedestal concrete in the present invention allows workers to move freely on the pedestal concrete by building a construction platform 1 on the top surface of the pedestal, which is beneficial for workers to work and improve construction efficiency. The installed finishing guide mechanism 2 not only improves the accuracy of leveling during the finishing work and improves the construction quality, but also can control the slope of the concrete on the top of the pedestal, making it convenient for the pedestal to drain. In addition, the finishing construction is carried out three times in the initial setting stage, the mid-term stage and the basic solidification stage of the concrete, which effectively guarantees the flatness of the concrete surface and greatly reduces the probability of cracking, cracks or unevenness of the concrete. The finishing construction adopts simultaneous construction in different areas, which shortens the construction time without affecting the construction quality, not only improves the construction efficiency, but also ensures that the finishing is completed within the optimal finishing time period. In addition, different maintenance methods are divided for the pedestal concrete in different areas, fully considering the influence of different external environments on the quality of concrete, and further ensuring the quality of concrete.

[0084] In the meantime, see Figures 5 to 9 As shown, an embodiment of the present invention further discloses a cap concrete surface finishing device, comprising a construction platform 1, a surface finishing guide mechanism 2 and a scraper 3.

[0085] Among them, the construction platform 1 includes a vertical support system 11 and a support plate 12 for being set on the top surface of the base; the surface finishing guide mechanism 2 is used to be set on the top surface of the base and is located below the construction platform 1; the scraper 3 is set on the surface finishing guide mechanism 2 and can move back and forth along the surface finishing guide mechanism 2.

[0086] The construction platform 1 is used to be built on the foundation concrete, and mainly includes a vertical support system 11 and a support plate 12. Its function is to provide workers with a convenient, safe and reliable platform during the finishing operation.

[0087] The vertical support system 11 primarily comprises steel pipes 114, sleeves 113, vertical reinforcement bars 111, and horizontal reinforcement bars 112. The vertical reinforcement bars 111 are fixed to the reinforcement mesh 4 in the tower base area; the horizontal reinforcement bars 112 are fixed to the vertical reinforcement bars 111; each sleeve 113 is fixed to a vertical reinforcement bar 111; and the steel pipes 114 are fixed to multiple sleeves 113 to connect them.

[0088] Specifically, the vertical steel bars 111 are welded to the steel mesh 4 in the tower base area with a spacing of 2m, and the horizontal steel bars 112 are welded at the designed position of the vertical steel bars 111; the sleeves 113 are welded every 2m along the length direction of the steel pipe 114; finally, the sleeves 113 are installed on the vertical steel bars 111 to form a vertical support system 11.

[0089] The support plates 12 are mainly used to support the workers during construction and facilitate the workers' activities in the construction area. The support plates 12 can be arranged at intervals horizontally or vertically along the construction area to form an integral support network system.

[0090] The finishing guide mechanism 2 includes support bars 21, positioning channels 22, and angle steel 23. Its function is to ensure the smoothness and slope of the finishing surface when the scraper 3 is operating on the finishing guide mechanism 2. The support bars 21 are fixed to the steel mesh 4 in the tower base area; the positioning channels 22 are mounted on the support bars 21. Preferably, the support bars 21 are in the shape of a horse stool.

[0091] It is worth noting that the angle steel 23 mainly plays the role of auxiliary positioning. It is installed on the foundation template and the model is ∠50×4mm. The bottom surface of the angle steel 23 is the concrete edge height control surface. The angle of the angle steel 23 is corrected to 89°. Then, the wire is pulled along the bottom of the angle steel through two positioning steel grooves to determine its elevation, thereby controlling the installation slope of the scraper 3. After the first surface finishing, the slope of the concrete on the foundation top is set to 1°.

[0092] In summary, the cap concrete finishing device of the present invention comprises a construction platform 1, a finishing guide mechanism 2, and a scraper 3. The construction platform 1 allows workers to move freely on the cap concrete, facilitating construction and improving efficiency. The finishing guide mechanism 2 not only enhances leveling accuracy during finishing, improving construction quality, but also controls the slope of the concrete on top of the cap, facilitating drainage.

[0093] The foregoing is merely a list of specific embodiments of the present application, intended to enable those skilled in the art to understand or implement the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application is not limited to the embodiments shown herein, but is intended to conform to the broadest scope consistent with the principles and novel features of the present application.

Claims

1. A method for finishing the concrete surface of a cap, characterized in that: The method comprises the following steps: Building a construction platform (1) on the top surface of the pedestal, and installing a surface-collecting guide mechanism (2) between the top surface of the pedestal and the construction platform (1); Carry out the pouring and vibrating of the foundation concrete and let it stand for the first period; Based on the constructed construction platform (1), a finishing route for the partitioned construction is set, and a scraper (3) is moved on the finishing guide mechanism (2) to perform the first finishing; After the second period of pouring of the cap is completed, the second finishing of the cap concrete is carried out in the same way as the first finishing; Before the initial setting of the concrete, a slurry collecting machine is used to collect the surface of the cap concrete for the third time; The construction platform (1) is constructed on the top surface of the foundation, comprising: Fixing a plurality of vertical steel bars (111) to the steel mesh (4) in the tower base area, and fixing horizontal steel bars (112) to the vertical steel bars (111); A sleeve (113) is installed on the top of each vertical steel bar (111), and multiple sleeves (113) are connected using steel pipes (114) to form a vertical support system (11) of the construction platform (1); Arrange a plurality of support plates (12) of the construction platform (1) along the construction area of the cap concrete, install one end of each support plate (12) on the top of the cap formwork (5), and install the other end on the vertical support system (11); The surface collecting guide mechanism (2) is installed between the top surface of the bearing platform and the construction platform (1), comprising: Fixing the supporting steel bars (21) of the surface-receiving guide mechanism (2) on the steel mesh (4), and bending the supporting steel bars (21) into a horse stool shape; The positioning channel steel (22) of the face-collecting guide mechanism (2) is installed on the supporting steel bar (21).

2. A method for finishing a cap concrete surface according to claim 1, characterized in that: When performing the second finishing of the cap concrete, a construction-while-disassembly operation method is adopted to disassemble the construction platforms (1) one by one, and smooth out the traces left when disassembling the construction platforms (1).

3. A method for finishing a cap concrete surface according to claim 1, characterized in that: After the slurry collecting machine is used to finish the foundation concrete for the third time, the method further includes the step of using a wooden trowel to smooth the entire surface.

4. A method for finishing a cap concrete surface according to claim 1, characterized in that: The method also includes the steps of maintaining the top surface of the platform, which include: For the area outside the tower base, lay a layer of plastic film, a layer of geotextile and a layer of thermal insulation blanket for maintenance; For the area within the tower base, wooden baffles are installed on the edge of the tower base, and the top surface of the pedestal in the tower base area is roughened. After the roughening is completed, the top surface of the pedestal in the tower base area is stored with water for maintenance.

5. A cap concrete finishing device, characterized in that: include: A construction platform (1) comprising a vertical support system (11) and a support plate (12) for being arranged on the top surface of the platform; A surface collecting guide mechanism (2), which is used to be arranged on the top surface of the support platform and is located below the construction platform (1); and A scraper (3) is provided on the surface collecting guide mechanism (2) and can move back and forth along the surface collecting guide mechanism (2); The vertical support system (11) comprises: A plurality of vertical steel bars (111) for fixing to the steel mesh (4) in the tower base area; a plurality of horizontal steel bars (112) fixed to the vertical steel bars (111); A plurality of sleeves (113), each sleeve (113) being fixed on one of the vertical steel bars (111); a plurality of steel pipes (114) fixed to the plurality of sleeves (113) to connect the plurality of sleeves (113); The dough collecting guide mechanism (2) comprises: Support steel bars (21) for fixing to the steel mesh (4) in the tower base area; Positioning channel steel (22), which is installed on the supporting steel bar (21).

6. The device for finishing the cap concrete surface according to claim 5, characterized in that: The supporting steel bar (21) is in the shape of a horse stool.

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