A large-diameter steel cage positioning and lowering grouting platform and its operation method

Abstract

This invention discloses a large-diameter steel cage positioning, lowering, and pouring platform and its operation method, relating to the field of bridge large-diameter bored pile foundation construction technology. It includes a load-bearing component, comprising a platform frame, steel cage positioning pins, a platform flip-up cover, and a fixing beam; and a fastening component, comprising a pressing component, a moving locking component, a first limiting component, and a second limiting component. By setting up the load-bearing component, safety hazards at the borehole opening are eliminated during the lowering and pouring of the steel cage. A specially constructed closed borehole fixing platform ensures the safety of the construction process and serves to fix the steel cage and prevent it from floating during pouring. Simultaneously, the fastening component ensures that the entire platform maintains a stable connection during concrete pouring, further guaranteeing the safety of the construction process.

Description

Technical Field

[0001] This invention relates to the field of bridge large-diameter bored pile foundation construction technology, and to a large-diameter steel cage positioning and lowering grouting platform and its operation method. Background Technology

[0002] In recent years, new technologies, methods, and processes for bored piles have been continuously developing in China. They have evolved from traditional "drilling" to "rotary drilling," from "mud wall protection" to "full casing" drilling (also known as Benott piles), from "equal diameter piles" to "expanded multi-column piles or enlarged base piles," and from "hole cleaning for bored piles" to "post-grouting technology." The adoption of these new technologies, methods, and processes has revitalized bored pile technology and created enormous social, technical, and economic benefits.

[0003] In bridge foundation construction, large-diameter bored piles offer advantages such as high bearing capacity, high rigidity, fast construction, and low cost. However, due to the excessively large diameter of the main pier piles, larger and heavier reinforcing cages and more concrete are required. If traditional construction methods are used, there are difficulties in positioning and lowering the reinforcing cage, as well as safety risks at the borehole opening during the lowering and pouring process, which are difficult to control. Furthermore, quality issues such as the elevation, verticality, and integrity of the reinforcing cage are also difficult to control, making it difficult to guarantee construction costs.

[0004] To avoid safety issues during the lowering and pouring of the reinforcing cage, a baffle plate needs to be installed on the top surface of the bored pile opening, which is then removed after the concrete is poured. Alternatively, the reinforcing cage can be positioned on top of the casing, requiring the installation and removal of the protective barrier each time the cage is connected. Regardless of the method used, this involves a large number of temporary structures and repetitive work, bringing many unfavorable factors to the on-site construction organization and increasing construction costs and timelines. Summary of the Invention

[0005] In view of the problems existing in the prior art, the present invention is proposed.

[0006] Therefore, the technical problem to be solved by the present invention is that in the early preparation of existing bored pile construction, there is a lack of relevant grouting assistance and safety protection equipment at the borehole opening during the later process of lowering the steel cage and grouting, which may lead to safety hazards.

[0007] To solve the above-mentioned technical problems, the present invention provides the following technical solution: a large-diameter steel cage positioning and lowering grouting platform, comprising a bearing component, the bearing component comprising a platform frame, a steel cage positioning pin, a platform flip cover, and a fixing beam, the steel cage positioning pin being inserted into the platform frame, the platform flip cover being disposed on the upper side of the platform frame and connected to the platform frame via a hinge, and the fixing beam being disposed on one side of the platform flip cover and connected to the platform frame;

[0008] The fastening assembly, which is connected to the bearing assembly, includes a pressing member, a movable locking member, a first limiting member, and a second limiting member. The pressing member is disposed in a slot opened in the side wall of the platform frame and connected to the fixed crossbeam. The movable locking member is connected to the pressing member. The first limiting member is disposed on one side of the pressing member and connected to it. The second limiting member is disposed on the side wall of the platform frame and connected to the movable locking member.

[0009] As a preferred embodiment of the large-diameter steel cage positioning and lowering grouting platform of the present invention, the pressing component includes a pressing block, a telescopic rod, a telescopic sleeve, a telescopic spring, and a connecting plate. One end of the pressing block is connected to the bottom wall of the slot through the telescopic rod, the telescopic sleeve, and the telescopic spring. One end of the connecting plate is fixedly connected to the side wall of the pressing block, and the other end is movably connected to the platform frame through bolts.

[0010] The pressure block is slidably connected to the insertion groove on one side of the slot, and the other end of the pressure block abuts against the docking groove on one side of the fixed crossbeam.

[0011] As a preferred embodiment of the device for positioning and lowering a large-diameter steel cage for grouting according to the present invention, the movable locking component is disposed on both sides of the pressure block and includes a pressure-bearing movable rod, a locking protrusion, and a locking spring. The pressure-bearing movable rod is disposed in the movable groove on both sides of the slot and is connected to the side wall of the movable groove through the locking spring. The pressure-bearing movable rod is in contact with the locking groove on the side wall of the pressure block through a locking protrusion at one end. The locking protrusion is disposed at the other end of the pressure-bearing movable rod and engages with the locking groove on the side wall of the platform flip cover.

[0012] As a preferred embodiment of the large-diameter steel cage positioning and lowering grouting platform of the present invention, the first limiting member includes an upper lifting plate, a lever plate and a lever support block. The lever support block is fixedly connected to the slotted side wall, the lever plate and the lever support block are rotatably connected by a torsion spring, and the upper lifting plate is slidably connected to the pressure block.

[0013] As a preferred embodiment of the large-diameter steel cage positioning and lowering grouting platform of the present invention, the lever plate is bent at an angle, with one end abutting against the bottom wall of the pressure block and the other end abutting against the bottom wall of the lifting plate.

[0014] As a preferred embodiment of the large-diameter steel cage positioning and lowering grouting platform of the present invention, the second limiting member includes a clamping block, a base, a top rod, and a push block. The clamping block and the base are disposed on the platform frame and are connected by a torsion spring. One end of the top rod abuts against the side wall of the clamping block, and the other end passes through the side wall of the platform frame and abuts against the push block. The push block is fixedly connected to the side wall of the pressure-receiving moving rod.

[0015] As a preferred embodiment of the large-diameter steel cage positioning and lowering grouting platform of the present invention, the platform frame is provided with a plurality of support plates on its inner sidewall, and the support plates abut against the bottom wall of the platform flip cover.

[0016] As a preferred embodiment of the large-diameter steel cage positioning and lowering grouting platform of the present invention, the fixed crossbeam is provided with a positioning and lowering port for connecting the concrete grouting conduit.

[0017] Another objective of this invention is to provide an operation method for positioning and lowering a large-diameter steel cage for pouring, which includes the following steps:

[0018] The platform frame was hoisted to the injection pile inlet;

[0019] After inspecting the borehole, lower the reinforcing cage.

[0020] The steel cage is fixed using the steel cage positioning pins;

[0021] Close the platform cover and connect the fixed crossbeam to the platform frame;

[0022] The fastening assembly enables a tight and sealed connection.

[0023] Concrete pouring begins.

[0024] As a preferred embodiment of the operation method of the large-diameter steel cage positioning and lowering grouting platform described in this invention, when the fastening assembly achieves a fastening and sealing connection, the pressing component and the moving locking component are used to achieve a fastening connection of the platform flip cover, and the first limiting component and the second limiting component are used to limit the position of the fixed crossbeam.

[0025] The beneficial effects of this invention are as follows: by setting up a load-bearing component, the safety hazards of the orifice during the lowering and pouring of the reinforcing cage are eliminated. A specially made closed orifice fixing platform is used to ensure the safety of the construction process and to fix the reinforcing cage and prevent it from floating during the pouring process. At the same time, fastening components are set up to ensure that the overall platform can maintain a stable connection during the pouring of concrete, which can further ensure the safety of the construction process. Attached Figure Description

[0026] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0027] Figure 1 This is a schematic diagram of the overall device of the present invention.

[0028] Figure 2 This is an exploded view of the overall device of the present invention.

[0029] Figure 3 This is an exploded view of the overall device of the present invention.

[0030] Figure 4 This is a schematic diagram of part of the device of the present invention.

[0031] Figure 5 This is an exploded schematic diagram of some of the fastening components of the present invention.

[0032] Figure 6 This is a cross-sectional schematic diagram of the overall device of the present invention.

[0033] Figure 7 This is a partial schematic diagram of the pressing component of the present invention.

[0034] Figure 8 This is a schematic diagram of the fixed crossbeam and fastening components of the present invention. Detailed Implementation

[0035] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0036] Many specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways different from those described herein, and those skilled in the art can make similar extensions without departing from the spirit of the invention. Therefore, the invention is not limited to the specific embodiments disclosed below.

[0037] Secondly, the term "an embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places throughout this specification does not necessarily refer to the same embodiment, nor is it an embodiment that is mutually exclusive, either alone or selectively, with other embodiments.

[0038] Example 1

[0039] Reference Figure 1 - Figure 5 This is the first embodiment of the present invention. This embodiment provides a large-diameter steel cage positioning and lowering grouting platform, including a bearing component 100 and a fastening component 200. By setting the bearing component 100 at the grouting hole, a protective and auxiliary platform is provided for grouting construction. The fastening component 200 realizes a stable connection of the bearing component 100, so that the bearing component 100 can be stably erected during grouting work, avoiding factors that interfere with construction such as slippage.

[0040] Specifically, the load-bearing component 100 includes a platform frame 101, rebar cage positioning pins 102, a platform flip-up cover 103, and a fixing beam 104. The platform frame 101 is laid out according to the shape of the grouting hole, and four rebar cage positioning pins 102 are designed according to the shape of the rebar cage. The rebar cage positioning pins 102 are inserted into the platform frame 101 to fix and position the rebar cage at any time during the lowering process and to prevent the rebar cage from floating during the grouting process. At the same time, an octagonal through hole is provided on the inner side of the platform frame 101. The diameter of the platform is larger than the diameter of the pile foundation borehole. Two platform flaps 103 are installed on the through hole. The platform flaps 103 can be made of trapezoidal steel plates and are connected to the platform frame 101 by hinges. They can be opened and closed, and the platform can be completely closed to provide a manual operation position and eliminate potential safety hazards during underwater pile grouting. The fixed crossbeam 104 is set between the two platform flaps 103 and is connected to the platform frame 101. The concrete grouting equipment is erected on its upper part. The platform flaps 103 fit into the fixed crossbeam so that the entire platform achieves a fully enclosed effect.

[0041] Furthermore, the fastening assembly 200 is connected to the bearing assembly 100 and includes a pressing member 201, a movable locking member 202, a first limiting member 203, and a second limiting member 204. The pressing member 201 is disposed in a slot 101a opened in the side wall of the platform frame 101 and is connected to the fixed crossbeam 104, so that the fixed crossbeam 104 can be stably connected to the platform frame 101, thereby preventing slippage and misalignment during construction, which could lead to accidents during concrete pouring. The movable locking member 202 is connected to the pressing member 201. The first limiting member 203 is disposed on one side of the pressing member 201 and is connected to it. The second limiting member 204 is disposed on the side wall of the platform frame 101 and is connected to the movable locking member 202. Through the setting of the movable locking member 202, the opening and closing of the platform cover 103 is restricted after it is closed and the fixed crossbeam 104 is erected. That is, the platform cover 103 cannot be opened or closed during concrete pouring. The opening ensures safety during construction, and the first limiting member 203 and the second limiting member 204 serve as auxiliary measures to further limit the slippage and misalignment of the fixed crossbeam 104 during operation.

[0042] In summary, the cooperation between the bearing component 100 and the fastening component 200 enables the large-diameter steel cage to be fixed and positioned at any time when it is positioned below, and prevents the steel cage from floating during the grouting process. This ensures that the upper platform equipment remains stable during the grouting construction.

[0043] Example 2

[0044] Reference Figure 1 - Figure 8 This is the second embodiment of the present invention, which is based on the previous embodiment.

[0045] Furthermore, the pressing component 201 includes a pressing block 201a, a telescopic rod 201b, a telescopic sleeve 201c, a telescopic spring 201d, and a connecting plate 201e. One end of the pressing block 201a is telescopically connected to the bottom wall of the slot 101a through the telescopic rod 201b, the telescopic sleeve 201c, and the telescopic spring 201d. One end of the connecting plate 201e is fixedly connected to the side wall of the pressing block 201a, and the other end is movably connected to the platform frame 101 through bolts. It should be noted that when the pressing block 201a is telescopically moving, since the connecting plate 201e is movably connected to the inner side wall of the platform frame 101, the pressing block 201a can drive the connecting plate 201e to move up and down. This means that the connecting bolts can slide in the slot on the connecting plate 201e. The bolts only serve to limit the telescopic range of the pressing block 201a, preventing it from detaching from the slot 101a on the side wall of the platform frame 101.

[0046] Meanwhile, the pressure block 201a is slidably connected to the insertion groove 101a-1 on one side of the slot 101a, and the other end of the pressure block 201a abuts against the docking groove 104a on one side of the fixed crossbeam 104. When the fixed crossbeam 104 is placed on the platform frame 101, the top of the pressure block 201a is inserted into the docking groove 104a. Since the depth of the docking groove 104a is less than the length of the pressure block 201a above the platform frame 101, the fixed crossbeam 104 will press down on the pressure block 201a, thereby squeezing the telescopic rod 201b and the telescopic spring 201d, and causing the connecting plate 201e to slide downward.

[0047] Furthermore, movable locking components 202 are disposed on both sides of the pressure block 201a, including a pressure-bearing movable rod 202a, a locking protrusion 202b, and a locking spring 202c. The pressure-bearing movable rod 202a is disposed in the movable grooves 101b on both sides of the slot 101a, and is connected to the side wall of the movable groove 101b through the locking spring 202c. The pressure-bearing movable rod 202a contacts the locking groove 201a-1 on the side wall of the pressure block 201a through a locking protrusion 202a-1 at one end. Next, the locking protrusion 202b is located at the other end of the pressure-bearing moving rod 202a and engages with the locking groove 103a on the side wall of the platform flip cover 103. When the pressure block 201a moves downward, the locking groove 201a-1 presses down and squeezes the locking protrusion 202a-1, causing the pressure-bearing moving rod 202a to move to both sides, squeezing the locking spring 202c, and driving the locking protrusion 202b to move in the locking groove 103a, thereby restricting the opening movement of the closed platform flip cover 103.

[0048] It should be noted that the locking protrusion 202a-1 and the locking groove 202a-1 are trapezoidal in shape and fit together. When the locking groove 201a-1 moves downward, its inclined surface will push the inclined surface of the locking protrusion 202a-1, providing it with thrust. As shown in the attached figure, the locking groove 103a is right-angled. When the platform flip cover 103 closes downward, the locking protrusion 202b is inserted vertically from the locking groove 103a to the right-angle corner. When the pressure moving rod 202a is displaced, it drives the locking protrusion 202b to move laterally to the other end of the locking groove 103a, restricting the platform flip cover 103 from opening upward.

[0049] Preferably, the first limiting member 203 includes an upper lifting plate 203a, a lever plate 203b, and a lever block 203c. The lever block 203c is fixedly connected to the bottom side wall of the slot 101a. The lever plate 203b and the lever block 203c are rotatably connected by a torsion spring. The upper lifting plate 203a is slidably connected to the pressure block 201a. The lever plate 203b is bent at an angle, with one end abutting against the bottom wall of the pressure block 201a and the other end abutting against the bottom wall of the upper lifting plate 203a. When the pressure block 201a is pressed downward, it will press one end of the lever plate 203b at its bottom, causing the lever plate 203b at the bottom end of the upper lifting plate 203a to tilt upward, pushing the upper lifting plate 203a to move upward, so that the upper lifting plate 203a is just inserted into the opening provided in the fixed crossbeam 104.

[0050] It should be noted that the up-and-down movement of the lifting plate 203a is driven by the lever plate 203b, and it has no fixed positional relationship with the pressure block 201a.

[0051] Furthermore, the second limiting member 204 includes a clamping block 204a, a base 204b, a push rod 204c, and a push block 204d. The clamping block 204a and the base 204b are mounted on the platform frame 101 and are connected by a torsion spring. One end of the push rod 204c abuts against the side wall of the clamping block 204a, and the other end passes through the side wall of the platform frame 101 and abuts against the push block 204d. The push block 204d is fixedly connected to the side wall of the pressure-receiving moving rod 202a. When the fixed crossbeam 104 is placed on the platform frame 101, its width corresponds exactly to the clamping blocks 204a set on both sides. When it drives the pressure block 201a to move and drives the pressure moving rod 202a, the pressure moving rod 202a moves to both sides. The push block 204d fixed on its upper side pushes the top rod 204c to move upward and abut against the bottom of the clamping block 204a, making its contact with the fixed crossbeam 104 more secure, further limiting the possible positional displacement of the fixed crossbeam 104 during construction.

[0052] Preferably, the inner wall of the platform frame 101 is provided with a plurality of support plates 101c, which abut against the bottom wall of the platform cover 103. When the platform cover 103 is closed, the support plates 101c provide upward support.

[0053] Preferably, the fixed crossbeam 104 has a positioning and lowering port 104b for connecting the concrete pouring pipe, so that concrete can be poured into the hole from the positioning and lowering port 104b.

[0054] In summary, an auxiliary platform is provided for the positioning, lowering, and pouring of large-diameter steel cages. The platform is installed above the corresponding holes to improve construction efficiency and ensure construction safety.

[0055] Meanwhile, by setting the pressing component 201 and the moving locking component 202, a locking device is provided for the closed platform flap, so that the platform flap cannot be easily opened when the fixed crossbeam 104 is placed and concrete pouring is to begin, ensuring safety during construction and avoiding potential safety hazards. The first limiting component 203 and the second limiting component 204 are provided so that the fixed crossbeam 104 can maintain its position after being docked with the platform frame, so that it will not slip during construction and cause errors in the pouring work.

[0056] Example 3

[0057] Reference Figure 1 - Figure 5 This is the third embodiment of the present invention, which provides an operation method for positioning and lowering a large-diameter steel cage for grouting.

[0058] Specifically, the platform frame 101 was hoisted to the injection pile inlet;

[0059] After the hole is inspected, the reinforcing cage is lowered and fixed using the reinforcing cage positioning pin 102. The reinforcing cage is connected to the reinforcing cage positioning pin 102 to prevent the reinforcing cage from floating during the pouring process.

[0060] Close the platform cover 103 and connect the fixed crossbeam 104 to the platform frame 101;

[0061] A secure and airtight connection is achieved through fastening component 200;

[0062] Concrete pouring begins.

[0063] After the grouting is completed, the fixed crossbeam 104 is lifted, the platform cover 103 can be opened, the platform can be removed, and the protective casing can be pulled out.

[0064] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A large-diameter steel cage positioning and lowering pouring platform, characterized in that: include, The load-bearing component (100) includes a platform frame (101), a rebar cage positioning pin (102), a platform flap (103), and a fixing beam (104). The rebar cage positioning pin (102) is inserted into the platform frame (101). The platform flap (103) is located on the upper side of the platform frame (101) and is connected to the platform frame (101) via a hinge. The fixing beam (104) is located on one side of the platform flap (103) and is connected to the platform frame (101). The fastening assembly (200) includes a pressing member (201), a movable locking member (202), a first limiting member (203), and a second limiting member (204), wherein the pressing member (201) is disposed in a slot (101a) opened in the side wall of the platform frame (101); The pressing component (201) includes a pressing block (201a), a telescopic rod (201b), a telescopic sleeve (201c), a telescopic spring (201d), and a connecting plate (201e). One end of the pressing block (201a) is connected to the bottom wall of the slot (101a) through the telescopic rod (201b), the telescopic sleeve (201c), and the telescopic spring (201d). One end of the connecting plate (201e) is fixedly connected to the side wall of the pressing block (201a), and the other end is movably connected to the platform frame (101) through bolts. The other end of the pressure block (201a) abuts against the mating groove (104a) on one side of the fixed crossbeam (104); The movable locking component (202) is disposed on both sides of the pressure block (201a), including a pressure moving rod (202a), a locking protrusion (202b) and a locking spring (202c). The pressure moving rod (202a) is disposed in the moving groove (101b) on both sides of the slot (101a) and is connected to the side wall of the moving groove (101b) through the locking spring (202c). The pressure moving rod (202a) contacts the locking groove (201a-1) on the side wall of the pressure block (201a) through a locking protrusion (202a-1) provided at one end. The locking protrusion (202b) is disposed at the other end of the pressure moving rod (202a) and engages with the locking groove (103a) on the side wall of the platform flip cover (103). When the pressure block (201a) moves downward, the locking groove (201a-1) presses down and squeezes the locking protrusion (201a-1), causing the pressure moving rod (202a) to move to both sides, squeezing the locking spring (202c), and driving the locking protrusion (202b) to move in the locking groove (103a), thereby restricting the opening movement of the closed platform flip cover (103); The first limiting member (203) includes an upper lifting plate (203a), a lever plate (203b) and a lever block (203c). The lever block (203c) is fixedly connected to the side wall of the slot (101a), and the lever plate (203b) and the lever block (203c) are rotatably connected by a torsion spring. The lever plate (203b) is bent at an angle, with one end abutting against the bottom wall of the pressure block (201a) and the other end abutting against the bottom wall of the lifting plate (203a); When the pressure block (201a) is pressed downward, it will press the lever plate (203b) at one end of its bottom, causing the lever plate (203b) at one end of the bottom of the lifting plate (203a) to tilt upward, pushing the lifting plate (203a) to move upward, so that the lifting plate (203a) is just inserted into the opening provided in the fixed crossbeam (104); The second limiting member (204) includes a clamping block (204a), a base (204b), a top rod (204c), and a push block (204d). The clamping block (204a) and the base (204b) are mounted on the platform frame (101), and the clamping block (204a) and the base (204b) are connected by a torsion spring. One end of the top rod (204c) abuts against the side wall of the clamping block (204a), and the other end passes through the platform frame (101) and abuts against the push block (204d). The push block (204d) is fixedly connected to the upper side wall of the pressure-receiving moving rod (202a). When the pressure-moving rod (202a) moves to both sides, the push block (204d) fixed on its upper side pushes the top rod (204c) upward, abutting against the bottom of the clamping block (204a), making its contact with the fixed crossbeam (104) more secure.

2. The large-diameter steel cage positioning and lowering pouring platform as described in claim 1, characterized in that: The inner wall of the platform frame (101) is provided with several trays (101c), and the trays (101c) abut against the bottom wall of the platform cover (103).

3. The large-diameter steel cage positioning and lowering pouring platform as described in claim 2, characterized in that: The fixed crossbeam (104) is provided with a positioning and lowering port (104b) for connecting the concrete pouring pipe.

4. A method for operating a large-diameter steel cage positioning and lowering pouring platform, characterized in that: Including a large-diameter steel cage positioning and lowering pouring platform as described in any one of claims 1-3; and, The platform frame (101) is hoisted to the injection pile inlet; After inspecting the borehole, lower the reinforcing cage. The steel cage is fixed using the steel cage positioning pin (102); Close the platform cover (103) and connect the fixed crossbeam (104) to the platform frame (101). A tight, sealed connection is achieved through the fastening assembly (200); Concrete pouring begins.

5. The method for operating a large-diameter steel cage positioning and lowering pouring platform as described in claim 4, characterized in that: When the fastening assembly (200) achieves a fastening and sealing connection, the pressing member (201) and the moving locking member (202) are used to achieve a fastening connection of the platform cover (103), and the first limiting member (203) and the second limiting member (204) are used to limit the position of the fixed crossbeam (104).

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