Prefabricated block steel strand threading device and embankment protection slope prefabricated block paving method

Abstract

The present invention provides a prefabricated block steel strand threading and guiding device; it includes a steel strand threading machine and a guiding mechanism; the guiding mechanism includes a connecting bending tube and two sets of guiding components, the upper end of the clamp of the guiding component is provided with an opening, the clamp is sleeved on the outside of the guide tube, and the support frame is fixedly connected to the clamp; the connecting bending tube is arranged between the two sets of guiding components, and the other end of the connecting bending tube is sleeved on the starting end of the guide tube of the second guide component, and the guide tubes of the two sets of guiding components and the connecting bending tube constitute a guiding channel. The present device facilitates the threading and guiding of steel strands through the wiring holes of the prefabricated blocks, thereby realizing a reliable connection between adjacent prefabricated blocks. The present invention provides a method for paving prefabricated blocks for embankment protection slopes, including the following steps: earth excavation; slope repair work; laying geotextiles; laying gravel; spreading to form a gravel cushion layer; paving prefabricated blocks; using the present device to thread the steel strands and lock the bottom ends of the steel strands; pouring concrete on the slope surface. The present method shortens the construction period and saves engineering costs.

Description

Technical Field

[0001] The invention relates to water conservancy project construction equipment, in particular to a prefabricated block steel strand threading and leading device.

[0002] The invention also relates to a method for paving prefabricated blocks on a embankment protection slope. Background Art

[0003] Steel strands are widely used in the prestressing and tensioning of box girders in bridges. Shao Changxiao discussed the classification of prestressed bridge jacking construction methods in road and bridge engineering, analyzed the shortcomings of these methods, and explored corresponding improvement measures. Based on actual engineering projects, he analyzed the application of large-diameter steel strands in prestressed bridge jacking, including the design of prestressing systems for large-diameter steel strands in jacking bridges and the tensioning of large-diameter steel strands.

[0004] With the gradual improvement of construction technology, slope protection methods include turf slope protection, mortar stone slope protection, concrete slope protection, and precast concrete block slope protection. Precast concrete blocks are widely used in water conservancy project river slope protection due to their excellent characteristics such as erosion resistance, corrosion resistance, high strength, aesthetics, and adaptability to various geological conditions.

[0005] Currently, the laying of prefabricated blocks on the embankment slope is mainly done manually, but the manual threading of steel strands has the following disadvantages:

[0006] (1) The traditional manual bundling of steel strands requires a large amount of manpower for on-site construction, resulting in an increase in construction labor costs; (2) The construction skills of workers are uneven, and the construction quality is difficult to guarantee; (3) It is difficult to form the strands in one go during the manual bundling process, and secondary construction is required, which takes a long time; (4) Traditional manual construction makes it difficult to achieve the concept of integrating technology and innovative construction.

[0007] Utility model application number CN201220192444.6 discloses a prestressed steel strand threading device, comprising a threading head and a hollow connecting tube connected to the threading head. The threading head comprises an integrally manufactured head and a bolt portion; the bolt portion is connected to the hollow connecting tube; and the head has a streamlined conical structure. However, this patented technology is not designed for use in embankment environments and cannot assist in threading precast blocks on embankments. Summary of the Invention

[0008] 1. Technical Problems to be Solved by the Present Invention

[0009] The purpose of the present invention is to provide a prefabricated block steel strand threading and guiding device to solve the problems raised in the above background technology:

[0010] How to overcome the problems that the relevant devices in the existing technology are not suitable for embankment slope operations, resulting in slow material feeding, large errors, long time consumption, low efficiency in bundling and bundling in prefabricated block operations.

[0011] The present invention also aims to provide a method for paving prefabricated blocks for embankment protection slopes to solve the problems raised in the above background technology:

[0012] How to overcome the problems in the existing technology of complicated prefabricated block paving operation process and long engineering time.

[0013] 2. Technical solution

[0014] To achieve the above object, the present invention provides the following technical solutions:

[0015] A prefabricated block steel strand threading and guiding device;

[0016] It includes a steel strand bundle threading machine and a guiding mechanism. The steel strand bundle threading machine is provided with a straightening channel for the steel strands to enter and exit.

[0017] The guide mechanism includes a connecting bending tube and two sets of guide components, and the guide component includes a clamp, a guide tube and two side support frames. The upper end of the clamp is provided with an opening, and the clamp is sleeved on the outside of the guide tube. The two side support frames are respectively fixedly connected to the clamp, and the bottom of the support frame is fixed between the embankment surface;

[0018] The two groups of guide assemblies are the first guide assembly and the second guide assembly. The first guide assembly is horizontally arranged on the top of the embankment, and the second guide assembly is arranged on the embankment slope. One end of the connecting bending pipe is sleeved on the end of the guide pipe of the first guide assembly, and the other end of the connecting bending pipe is sleeved on the beginning of the guide pipe of the second guide assembly. The guide pipe of the first guide assembly, the connecting bending pipe and the guide pipe of the second guide assembly are connected in sequence to form a guide channel for changing the direction of the steel strand.

[0019] The steel strands pass through the straightening channel of the steel strand bundle threading machine and the guiding channel of the guiding mechanism in sequence and then extend toward the embankment slope.

[0020] As a preferred embodiment of the prefabricated block steel strand bundle threading and guiding device, the guiding assembly further comprises a plurality of ground nails, which are divided into two groups. The two groups of ground nails correspond one to one with the two support frames. The ground nails penetrate the corresponding support frames and extend into the embankment surface to fix the support frames and the embankment surface.

[0021] As a preferred embodiment of the prefabricated block steel strand threading and guiding device, the guiding assembly also includes a fastening bolt and a fastening nut, and fixed plates are respectively extended on the side walls of the clamp at the edge of the opening. The fastening bolt passes through the two fixed plates of the clamp and cooperates with the fastening nut.

[0022] As a preferred embodiment of the prefabricated block steel strand bundle threading and guiding device, the guide channel formed by sequentially connecting the guide tube of the first guide assembly, the connecting bending tube and the guide tube of the second guide assembly is a channel with a smooth transition.

[0023] When this structure is adopted, the steel strand bundle threading machine is arranged on the top of the embankment, and the guiding mechanism is used to guide the steel strands to extend toward the embankment slope. The prefabricated block steel strand bundle threading and guiding device facilitates the bundle threading and guiding of the steel strands and the prefabricated block wiring holes, thereby achieving reliable connection between adjacent prefabricated blocks and ensuring the safety and speed of construction.

[0024] The beneficial technical effects of the prefabricated block steel strand bundle threading and guiding device are:

[0025] (1) The steel strand threading machine and the guide mechanism are integrated into one, requiring fewer workers on site, which greatly reduces labor costs;

[0026] (2) The technology is reliable, the construction speed is fast, and the product is formed in one step, thus avoiding secondary construction;

[0027] (3) Avoid the impact of workers' construction quality, ensure construction quality, and effectively guarantee the construction period;

[0028] (4) The steel strand threading machine and guiding mechanism can realize the purposes of quick installation and removal, turnover and reuse, thereby indirectly reducing the relevant construction cost.

[0029] To achieve the above object, the present invention further provides the following technical solutions:

[0030] A method for paving prefabricated blocks for embankment protection slopes, comprising the following steps:

[0031] a) Excavate the embankment slope;

[0032] b) Carry out preliminary slope repair work on the embankment slope;

[0033] c) Laying geotextile on the embankment slope after slope repair;

[0034] d) Laying crushed stone on the geotextile;

[0035] e) paving the gravel from step d) to form a gravel cushion layer;

[0036] f) paving prefabricated blocks on the gravel cushion layer paved in step e);

[0037] g) sampling of steel strands;

[0038] h) bundling the steel strands using the prefabricated block steel strand bundling and guiding device as described above, specifically: placing the steel strand bundling machine of the prefabricated block steel strand bundling and guiding device on the top of the slope, horizontally arranging the first guide assembly on the top of the embankment, and arranging the second guide assembly on the embankment slope; straightening the steel strands after passing through the straightening channel of the steel strand bundling machine and the guide channel of the guide mechanism; and guiding the steel strands to extend parallel to the embankment slope, and sequentially passing through the through holes in the prefabricated block;

[0039] i) The steel strand passes through the bottom of the prefabricated block and is connected to the bottom of the steel strand by a lock;

[0040] j) Pour concrete on the slope surface, thread the steel strands through the bundles and bury the locks in the concrete;

[0041] k) Plastering the poured concrete;

[0042] l) Backfill the surface of prefabricated blocks.

[0043] After adopting this method, the problems of slow manual unloading, large errors, long time consumption, low efficiency of bundling and threading, etc. are overcome. The construction process of rapid bundling by using the prefabricated block steel strand bundle threading and lead-in device is simple, integrating rapid automatic unloading, rapid automatic bundling, and rapid automatic bundle threading, avoiding the workload of manual bundle threading, reducing personnel input, overcoming the many difficulties such as the insecurity of manual wire laying and long time consumption, and facilitating construction, improving work efficiency, shortening construction period, and saving project costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] Figure 1 This is a diagram of the usage status of an embodiment of the prefabricated block steel strand threading and guiding device.

[0045] Figure 2 yes Figure 1 Magnified view of part A.

[0046] Figure 3 It is a schematic diagram of the first guide component in the embodiment of the prefabricated block steel strand threading and guiding device.

[0047] Figure 4 yes Figure 3 Left view of .

[0048] Figure 5 It is a schematic diagram of paving prefabricated blocks in an embodiment of the embankment protection slope prefabricated block paving method.

[0049] Description of the numbers in the figure:

[0050] Steel strand bundle threading machine 1; connecting bending tube 2; first guide assembly 3; clamp 31; fixing plate 31a; guide tube 32; fastening bolt 33; fastening nut 34; support frame 35; ground spike 36; second guide assembly 4; embankment top 51; embankment slope 52; gravel cushion 53; steel strand 6; precast block 7. DETAILED DESCRIPTION

[0051] To make the above-mentioned objects, features, and advantages of the present invention more readily apparent, specific embodiments of the present invention are described in detail below with reference to the accompanying drawings. The following description sets forth numerous specific details to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways than those described herein, and those skilled in the art may make similar modifications without departing from the scope of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0052] The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only and do not represent the only implementations.

[0053] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this invention pertains. The terms used in this specification of the present invention are for the purpose of describing specific embodiments only and are not intended to limit the present invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0054] See also Figures 1 to 5 .

[0055] The prefabricated block steel strand bundle threading and guiding device comprises a steel strand bundle threading machine 1 and a guiding mechanism.

[0056] The steel strand bundle threading machine 1 adopts the commercially available prestressed steel strand bundle threading machine 1. The working principle of the steel strand bundle threading machine 1 is: the reducer drives the double driving wheels to rotate, and a straightening channel for the steel strand 6 to enter and exit is provided in the steel strand bundle threading machine 1. The steel strand is inserted into the straightening channel from one end, and the driving wheel and the double cluster driving wheels press the steel strand and move it forward along the guide tube to pass into the straightening channel until it passes out from the end of the straightening channel and reaches the size for tensioning.

[0057] The guiding mechanism includes a connecting bending tube 2 and two sets of guiding components, namely a first guiding component 3 and a second guiding component 4. The structures of the first guiding component 3 and the second guiding component 4 are completely interconnected. The following takes the first guiding component 3 as an example to specifically introduce the structural features of the first guiding component 3:

[0058] The first guide assembly 3 includes a clamp 31, a guide tube 32, a fastening bolt 33, a fastening nut 34, support frames 35 on both sides and eight ground nails 36. The upper end of the clamp 31 is provided with an opening, and fixed plates 31a are respectively extended on the side walls of the clamp 31 at the edge of the opening. The fastening bolt 33 passes through the two fixed plates 31a of the clamp 31 and cooperates with the fastening nut 34. The clamp 31 is sleeved on the outside of the guide tube 32, and the support frames 35 on both sides are respectively welded and fixed to the clamp 31. The bottom of the support frame 35 is fixed to the embankment surface. The eight ground nails 36 are divided into two groups. The two groups of ground nails 36 correspond one-to-one to the two support frames 35. The ground nails 36 pass through the corresponding support frames 35 and extend into the embankment surface to fix the support frames 35 to the embankment surface.

[0059] The first guide assembly 3 is horizontally arranged on the top of the embankment 51, and the second guide assembly 4 is arranged on the embankment slope 52. One end of the connecting bending tube 2 is sleeved on the end of the guide tube 32 of the first guide assembly 3, and the other end of the connecting bending tube 2 is sleeved on the beginning of the guide tube 32 of the second guide assembly 4. The guide tube 32 of the first guide assembly 3, the guide tube 32 connecting the bending tube 2 and the second guide assembly 4 are connected in sequence to form a guide channel for the steel strand 6 to change direction. The guide channel formed by the guide tube 32 of the first guide assembly 3, the guide tube 32 connecting the bending tube 2 and the second guide assembly 4 is a channel with a smooth transition.

[0060] The steel strands 6 pass through the straightening channel of the steel strand bundle threading machine 1 and the guide channel of the guide mechanism in sequence and then extend toward the embankment slope 52 .

[0061] According to the actual construction progress of the project site, after the embankment reinforcement has been completed, the slope protection slope prefabricated block paving method is started, including the following steps:

[0062] a) Excavate the embankment slope.

[0063] b) Carry out preliminary slope repair work on the embankment slope.

[0064] c) Lay geotextile on the embankment slope after slope repair work.

[0065] d) Lay crushed stone on the geotextile.

[0066] e) Spreading the crushed stones from step d) to form a crushed stone cushion layer 53 .

[0067] f) Laying prefabricated blocks 7 on the crushed stone cushion layer 53 after paving in step e).

[0068] g) Sampling the steel strand 6.

[0069] h) The steel strands 6 are bundled using the prefabricated block steel strand bundle threading device as described above, specifically: the steel strand bundle threading machine 1 of the prefabricated block steel strand bundle threading device is placed on the top of the slope, the first guide component 3 is horizontally arranged on the embankment top 51, and the second guide component 4 is arranged on the embankment slope 52. The steel strands 6 are straightened after passing through the straightening channel of the steel strand bundle threading machine 1 and the guide channel of the guide mechanism, and the steel strands 6 are guided to extend parallel to the embankment slope 52. The steel strands 6 pass through the through holes in the prefabricated block 7 in sequence.

[0070] i) Preparation work before starting the steel strand bundle threading machine 1: Check whether the electrical circuit is intact, check the oil level in the reducer, check the direction of motor rotation to see if it is in line with the direction marked by the arrow on the casing, turn on the power, and debug to ensure forward and reverse rotation.

[0071] Start the steel strand bundle threading machine 1, insert the steel strand wire from the straightening channel of the steel strand bundle threading machine 1, press the wire feed button switch to allow the steel strand wire to slowly pass through the straightening channel, enter the straightening channel along the guide tube to the other end and pass out to reach the reserved tensioning size, that is, the steel strand wire 6 passes through the bottom of the prefabricated block 7, and cut it with a handheld sand wheel machine. Pay attention to whether the operation is normal. When any fault is found, stop the machine immediately, find out the cause and eliminate the fault before starting again, and connect the bottom of the steel strand wire 6 with the lock.

[0072] j) Pour concrete on the slope surface, and lock the steel strands 6 into the concrete after they are bundled.

[0073] k) Apply finishing touches to the poured concrete.

[0074] l) Backfill the surface of the prefabricated block 7 to complete the paving of the prefabricated block 7 on the embankment protection slope.

[0075] This embankment protection slope prefabricated block paving method proposes the use of a steel strand 6 bundle threading device to bundle the steel strand 6 of the concrete prefabricated block 7, forming a set of construction process flow for reliably connecting the steel strand 6 with the bundle threading hole of the prefabricated block 7, ensuring the simplicity and safety of the construction process.

[0076] The above is only one embodiment of the present invention. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the principles of the present invention, and these should also be regarded as falling within the scope of protection of the present invention.

Claims

1. A prefabricated steel strand threading and guiding device, characterized by: The invention comprises a steel strand bundle threading machine (1) and a guiding mechanism. The steel strand bundle threading machine (1) is provided with a straightening channel for the steel strand (6) to enter and exit. The guide mechanism comprises a connecting bending tube (2) and two sets of guide components, and the guide components further comprise a hoop (31), a guide tube (32) and two side support frames (35), the upper end of the hoop (31) is provided with an opening, the hoop (31) is sleeved on the outside of the guide tube (32), the two side support frames (35) are respectively fixedly connected to the hoop (31), and the bottom of the support frame (35) is fixed between the embankment surface; The two groups of guide components are respectively a first guide component (3) and a second guide component (4); the first guide component (3) is horizontally arranged on the top of the embankment (51); the second guide component (4) is arranged on the embankment slope (52); one end of the connecting bending pipe (2) is sleeved on the end of the guide pipe (32) of the first guide component (3); the other end of the connecting bending pipe (2) is sleeved on the beginning of the guide pipe (32) of the second guide component (4); the guide pipe (32) of the first guide component (3), the guide pipe (32) connecting the bending pipe (2) and the second guide component (4) are sequentially connected to form a guide channel for the steel strand (6) to change direction; The steel strands (6) sequentially pass through the straightening channel of the steel strand bundle threading machine (1) and the guide channel of the guide mechanism and then extend toward the embankment slope (52); The guide assembly further comprises a plurality of ground nails (36), the plurality of ground nails (36) being divided into two groups, the two groups of ground nails (36) corresponding to the two support frames (35) one by one, the ground nails (36) penetrating the corresponding support frames (35) and extending into the embankment surface, thereby achieving fixation of the support frames (35) and the embankment surface; The guide assembly further comprises a fastening bolt (33) and a fastening nut (34); fixed plates (31a) are respectively extended from the side walls of the hoop (31) at the edge of the opening; the fastening bolt (33) passes through the two fixed plates (31a) of the hoop (31) and cooperates with the fastening nut (34).

2. The prefabricated block steel strand threading and guiding device according to claim 1 is characterized in that: The guide channel formed by sequentially connecting the guide tube (32) of the first guide assembly (3), the connecting bending tube (2) and the guide tube (32) of the second guide assembly (4) is a channel with a smooth transition.

3. A method for paving prefabricated blocks for embankment protection slopes, comprising the following steps: a) Excavate the embankment slope; b) Carry out preliminary slope repair work on the embankment slope; c) Laying geotextile on the embankment slope after slope repair; d) Laying crushed stone on the geotextile; e) paving the crushed stones from step d) to form a crushed stone cushion layer (53); f) paving the prefabricated blocks (7) on the crushed stone cushion (53) paved in step e); g) sampling the steel strand (6); h) using the prefabricated block steel strand bundle threading and guiding device as described in any one of claims 1 to 2 to thread the steel strands (6) into a bundle, specifically: the steel strand threading machine (1) of the prefabricated block steel strand bundle threading and guiding device is placed on the top of the slope, the first guide assembly (3) is horizontally arranged on the top of the embankment (51), and the second guide assembly (4) is arranged on the embankment slope (52); the steel strands (6) are straightened after passing through the straightening channel of the steel strand threading machine (1) and the guide channel of the guide mechanism, and the steel strands (6) are guided to extend parallel to the embankment slope (52); and the steel strands (6) are sequentially passed through the through holes in the prefabricated block (7); i) The steel strand (6) passes through the bottom of the prefabricated block (7), and the bottom of the steel strand (6) is connected by a lock; j) pouring concrete on the slope surface, and burying the steel strands (6) in the concrete after they are bundled and locked; k) Plastering the poured concrete; l) Backfill the surface of the prefabricated block (7).

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