Combined honeycomb roadbed structure based on recycled concrete

Abstract

The invention discloses a combined type honeycomb roadbed structure based on recycled concrete, and belongs to the technical field of roadbed structure design, the combined type honeycomb roadbed structure comprises pipe fitting soil retaining structures formed by splicing multiple layers of tiled pipe fitting sets, backfilling areas are formed among the pipe fitting soil retaining structures, each tiled pipe fitting set comprises multiple honeycomb prefabricated pipe fittings arranged side by side, and the multiple tiled pipe fitting sets are arranged side by side; the adjacent honeycomb prefabricated pipe fittings are arranged in an attached mode, the pipe fitting soil retaining structure is divided into a plurality of backfilling layers in the longitudinal direction, each backfilling layer comprises a plurality of tiled pipe fitting sets, two sets of limiting rod assemblies are arranged on the backfilling layers, each limiting rod assembly comprises at least two limiting rods arranged in the axial direction of the honeycomb prefabricated pipe fittings, and the two sets of limiting rod assemblies are arranged in an X shape. And the limiting rods in each limiting rod assembly penetrate through the backfill layers in the vertical direction of the slope of the honeycomb prefabricated pipe fitting, and the limiting rod assemblies in the adjacent backfill layers form a rhombic closed area on the cross section. The limiting rods sequentially penetrate through the backfilling layers, and the stability of the spliced honeycomb prefabricated pipe fittings is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of roadbed structure design, and in particular relates to a combined honeycomb roadbed structure based on recycled concrete. Background Art

[0002] A large amount of construction waste will be generated during the construction of highways. If the construction waste is not placed in an area with good geology, a large amount of engineering treatment costs will be incurred and large-scale landslides will occur. Therefore, properly handling the construction waste generated during the construction process has become the main means to reduce the cost of project engineering. The preparation of construction waste into recycled concrete has been widely used in the field of domestic infrastructure construction. In road construction, recycled concrete can be used as base and subbase materials, effectively reducing dependence on natural resources and improving the durability and bearing capacity of roads.

[0003] In order to better carry out the construction of expressways, the anti-overturning performance of traditional retaining walls is optimized, the amount of backfill soil required is reduced by optimizing the retaining wall structure, and the recycling efficiency of construction waste during the construction process is improved; in the prior art, a Chinese patent with announcement number CN118273179A proposes a honeycomb roadbed retaining structure and a construction method thereof, in which honeycomb prefabricated pipe parts made of construction waste are laid and assembled in multiple layers to form a right-angled trapezoid as a whole, and the soil excavated by backfilling the embankment is supported on the inclined side of the right-angled trapezoid, so that the roadbed retaining structure has excellent anti-overturning ability and stability, reduces the mining of backfill soil in existing projects, and improves the utilization efficiency of construction residues. However, in the above technology, when backfilling the soil, only the friction force of the contact surface of the honeycomb prefabricated pipe is used to resist the overturning of the retaining wall caused by the active earth pressure generated by the backfill soil. The active earth pressure generated by the backfill soil is relatively large. Only the friction force of the contact surface of the prefabricated pipe is used to resist it, which may easily cause the prefabricated pipes located at the edge to topple, thereby reducing the stability of the prefabricated pipes after splicing. In addition, during the operation of the roadbed, the prefabricated pipes may be easily dislocated or collapsed due to vehicle load and soil settlement.

[0004] Therefore, it is necessary to propose a combined honeycomb roadbed structure based on recycled concrete to solve the above problems. Summary of the invention

[0005] In view of this, an object of the present invention is to provide a combined honeycomb roadbed structure based on recycled concrete, so as to solve the problem of insufficient stability of honeycomb prefabricated pipes after splicing in the prior art.

[0006] In order to achieve the above object, the present invention provides the following technical solutions: The present invention provides a combined honeycomb roadbed structure based on recycled concrete, comprising a pipe retaining structure formed by splicing multiple layers of flat pipe groups, a backfill area for backfilling soil is formed between the pipe retaining structures, the backfill area is in the shape of an isosceles trapezoid which is wide at the top and narrow at the bottom, each layer of the flat pipe group comprises a plurality of honeycomb prefabricated pipes arranged side by side in a horizontal direction, the cross section of the honeycomb prefabricated pipes is in the shape of a regular hexagon, and in the flat pipe groups of adjacent layers, adjacent honeycomb prefabricated pipes are arranged in a close fit, the pipe retaining structure is divided into a plurality of backfill layers in the longitudinal direction, each backfill layer comprises a plurality of flat pipe groups, two groups of limiting rod assemblies are arranged on the backfill layer, the limiting rod assemblies comprise at least two limiting rods arranged axially along the honeycomb prefabricated pipes, the two groups of limiting rod assemblies are arranged in an X shape, and the limiting rods in each group of limiting rod assemblies penetrate the backfill layer in the vertical direction of the inclined surface of the honeycomb prefabricated pipe, and the limiting rod assemblies in adjacent backfill layers form a diamond-shaped closed area in the cross section.

[0007] Furthermore, a through hole cooperating with the limiting rod is arranged on the honeycomb prefabricated pipe member for the limiting rod to pass through.

[0008] Furthermore, a threaded section is provided on the bottom end side of the limiting rod extending out of the backfill layer, and a limiting block is fixedly provided on the side of the limiting rod away from the threaded section. The diameter of the limiting block is larger than the diameter of the limiting rod, and the outer diameter of the threaded section is smaller than the diameter of the limiting rod. A nut is threadedly connected to the threaded section, and the threaded connection between the nut and the threaded section can fix multiple honeycomb prefabricated pipe fittings through which the limiting rod passes between the nut and the limit block.

[0009] Furthermore, a positioning groove is provided on one side of the honeycomb prefabricated pipe, and a positioning plate cooperating with the positioning groove is provided on the side opposite to the positioning groove of the honeycomb prefabricated pipe, and the through hole passes through the positioning groove and the positioning plate.

[0010] Furthermore, the construction method of the combined honeycomb roadbed structure based on recycled concrete comprises the following steps: S1, splicing the first backfill layer: multiple honeycomb prefabricated pipe fittings are installed side by side in the horizontal direction to form a first layer of flat pipe fittings group, and then the second layer of honeycomb prefabricated pipe fittings are installed between adjacent honeycomb prefabricated pipe fittings in the first layer of flat pipe fittings group to form a second layer of flat pipe fittings group, and multiple layers of flat pipe fitting groups are installed in sequence in the above manner to form the first backfill layer, wherein two groups of limiting rod assemblies are then obliquely penetrated through the honeycomb prefabricated pipe fittings from both ends of the top of the first backfill layer until they extend a preset distance from both ends of the bottom of the first backfill layer, and then the multiple honeycomb prefabricated pipe fittings through which the limiting rods pass are fixed between the nut and the limit block by threading the nut and the threaded section; S2, backfill the first backfill layer with soil, so that the backfill soil covers the limit rod extending from the bottom end of the first backfill layer, and a limit rod height extending from the bottom end of the second backfill layer is reserved between the backfill soil and the top of the first backfill layer, and compact 3 to 4 times after backfilling; S3, splicing the backfill layers in sequence according to steps S1 to S2 and backfilling the soil until a combined honeycomb roadbed structure based on recycled concrete is formed.

[0011] Furthermore, baffles capable of sealing the openings of the honeycomb prefabricated pipe are threadedly connected on both sides of the honeycomb prefabricated pipe. In step S1, after each layer of flat pipe groups is arranged, the baffles are threadedly connected to the openings on both sides of the honeycomb prefabricated pipe to seal the honeycomb prefabricated pipe.

[0012] Furthermore, the baffle includes a first baffle threadedly connected to the honeycomb prefabricated pipe away from the backfill area and a second baffle threadedly connected to the honeycomb prefabricated pipe close to the backfill area, the first baffle is provided with a grouting port, the grouting port is threaded with a blocking block capable of closing the grouting port, the second baffle is slidably connected to an upper limit position with a piston, a spring is fixedly connected between the piston and the second baffle, a sliding rod is fixedly connected to the piston, and the second baffle is provided with a limiting hole slidably connected to the sliding rod.

[0013] The beneficial effects of the present invention are: The present invention can initially fix the honeycomb prefabricated pipe fittings in the backfill layer after they are spliced ​​by arranging the limiting rods to penetrate the backfill layers in sequence. After backfilling, the backfill soil covers the portion of the limiting rods extending out of the backfill layer, thereby improving the connection stability between the pipe retaining structure and the backfill soil. The diamond-shaped closed area formed in the cross section of the limiting rod assembly in the adjacent backfill layers can strengthen the limiting effect on the honeycomb prefabricated pipe fittings in the closed area, thereby improving the stability of the honeycomb prefabricated pipe fittings after splicing, and reducing the influence of soil settlement on the pipe retaining structure during roadbed operation. The setting of the limiting rods reduces the tipping of the honeycomb prefabricated pipe fittings caused by the active soil pressure during the soil backfilling process, and can limit the fixing effect of the limiting rods on the honeycomb prefabricated pipe fittings, thereby reducing the requirements for the surface roughness of the honeycomb prefabricated pipe fittings, thereby making the installation alignment process more labor-saving. In the process of the limiting rods penetrating the honeycomb prefabricated pipe fittings, it can be checked whether the honeycomb prefabricated pipe fittings are assembled in place.

[0014] Other advantages, objectives and features of the present invention will be described in the following description and will be apparent to those skilled in the art to some extent, or those skilled in the art may be taught from the practice of the present invention. The objectives and other advantages of the present invention may be realized and obtained through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to make the purpose, technical solution and beneficial effects of the present invention clearer, the present invention provides the following drawings for illustration: Figure 1 This is a schematic diagram of the backfill layer splicing structure of an embodiment of the present invention; Figure 2 It is a side view of the backfill layer splicing of an embodiment of the present invention; Figure 3 A schematic diagram of backfilling of backfill soil according to an embodiment of the present invention; Figure 4 A schematic structural diagram of a limiting rod according to an embodiment of the present invention; Figure 5 It is a schematic diagram of assembling a limiting rod penetrating adjacent honeycomb prefabricated pipe members according to an embodiment of the present invention; Figure 6 A structural cross-sectional view of a honeycomb prefabricated pipe according to an embodiment of the present invention; Figure 7 It is a schematic diagram of the operating status of the combined honeycomb roadbed structure based on recycled concrete according to an embodiment of the present invention.

[0016] The markings in the accompanying drawings are as follows: honeycomb prefabricated pipe 1, through hole 101, positioning groove 102, positioning plate 103, first baffle 104, second baffle 105, blocking block 106, piston 107, spring 108, slide rod 109, limiting hole 110, pipe retaining structure 2, backfill layer 201, closed area 202, backfill soil 203, backfill area 3, limiting rod 4, threaded section 401, limiting block 402, nut 403. DETAILED DESCRIPTION

[0017] like Figure 1 to Figure 7 As shown, the present invention provides a combined honeycomb roadbed structure based on recycled concrete, comprising: a pipe retaining structure 2 formed by splicing multiple layers of flat pipe groups, a backfilling area 3 for backfilling soil is formed between the pipe retaining structures 2, and the backfilling area 3 is in an isosceles trapezoid that is wide at the top and narrow at the bottom, each layer of the flat pipe group includes a plurality of honeycomb prefabricated pipes 1 arranged side by side in the horizontal direction, and the cross-section of the honeycomb prefabricated pipe 1 is a regular hexagon, and in the adjacent layers of the flat pipe groups, the adjacent honeycomb prefabricated pipes 1 are arranged in a close fit, and the pipe retaining structure 2 is formed by the pipe retaining structure 2. The structure 2 is divided into a plurality of backfill layers 201 along the longitudinal direction, each backfill layer 201 includes a plurality of layers of flat pipe groups, two groups of limiting rod 4 assemblies are arranged on the backfill layer 201, and the limiting rod 4 assemblies include at least two limiting rods 4 arranged axially along the honeycomb prefabricated pipe 1, and the two groups of limiting rod 4 assemblies are arranged in an X shape, and the limiting rods 4 in each group of limiting rod 4 assemblies penetrate the backfill layer 201 along the vertical direction of the inclined surface of the honeycomb prefabricated pipe 1, and the limiting rod 4 assemblies in adjacent backfill layers 201 form a diamond-shaped closed area 202 in the cross section.

[0018] The honeycomb prefabricated pipe 1 for the limiting rod 4 to pass through is provided with a through hole 101 that matches with the limiting rod 4 .

[0019] Among them, the limiting rod 4 is extended out of the bottom end side of the backfill layer 201 and is provided with a threaded section 401, and the limiting rod 4 is fixedly provided with a limiting block 402 on the side away from the threaded section 401, the diameter of the limiting block 402 is larger than the diameter of the limiting rod 4, and the outer diameter of the threaded section 401 is smaller than the diameter of the limiting rod 4, and a nut 403 is threadedly connected on the threaded section 401, and the threaded connection between the nut 403 and the threaded section 401 can fix multiple honeycomb prefabricated pipe fittings 1 through which the limiting rod 4 passes between the nut 403 and the limiting block 402.

[0020] In this scheme, the construction method of the combined honeycomb roadbed structure based on recycled concrete includes the following steps: S1, splicing the first backfill layer 201: installing multiple honeycomb prefabricated pipe fittings 1 side by side in the horizontal direction to form a first layer of flat pipe fitting group, and then installing the second layer of honeycomb prefabricated pipe fittings 1 between adjacent honeycomb prefabricated pipe fittings 1 in the first layer of flat pipe fitting group to form a second layer of flat pipe fitting group, and sequentially installing multiple layers of flat pipe fitting groups in the above manner to form the first backfill layer 201, wherein then two groups of limiting rod 4 assemblies are obliquely penetrated through the honeycomb prefabricated pipe fittings 1 from both ends of the top of the first backfill layer 201 until extending from both ends of the bottom of the first backfill layer 201 to a preset distance, and then the nut 403 is threadedly connected with the threaded section 401 so that the multiple honeycomb prefabricated pipe fittings 1 for limiting the rod 4 passing through are fixed between the nut 403 and the limit block 402; S2, backfill the first backfill layer 201 with soil, so that the backfill soil 203 covers the portion of the limit rod 4 extending out of the bottom end of the first backfill layer 201, and a height of the limit rod 4 extending out of the bottom end of the second backfill layer 201 is reserved between the backfill soil 203 and the top of the first backfill layer 201, and compact 3 to 4 times after backfilling; S3, according to steps S1 to S2, the backfill layer 201 is spliced ​​in sequence and the soil is backfilled until a combined honeycomb roadbed structure based on recycled concrete is formed.

[0021] The present solution can preliminarily fix the honeycomb prefabricated pipe fittings 1 in the backfill layer 201 after splicing by setting the limiting rods 4 to penetrate the backfill layer 201 in sequence. After backfilling, the backfill soil covers the portion of the limiting rods 4 extending out of the backfill layer 201, thereby improving the connection stability between the pipe retaining structure 2 and the backfill soil. The diamond-shaped closed area 202 formed in the cross section by the limiting rod assembly in the adjacent backfill layer can strengthen the limiting effect on the honeycomb prefabricated pipe fittings 1 in the closed area 202, thereby improving the stability of the honeycomb prefabricated pipe fittings 1 after splicing, and reducing the influence of soil settlement on the pipe retaining structure 2 during the operation of the roadbed. The setting of the limiting rods 4 reduces the tipping of the honeycomb prefabricated pipe fittings 1 caused by the active soil pressure during the soil backfilling process, and can limit the fixing effect of the limiting rods 4 on the honeycomb prefabricated pipe fittings 1, thereby reducing the requirements for the surface roughness of the honeycomb prefabricated pipe fittings 1, making the installation alignment process more labor-saving. In the process of the limiting rods 4 penetrating the honeycomb prefabricated pipe fittings 1, it can be checked whether the honeycomb prefabricated pipe fittings 1 are assembled in place.

[0022] In one embodiment of the present invention, a positioning groove 102 is provided on one side of the honeycomb prefabricated pipe 1, and a positioning plate 103 cooperating with the positioning groove 102 is provided on the side opposite to the positioning groove 102 of the honeycomb prefabricated pipe 1, and the through hole 101 passes through the positioning groove 102 and the positioning plate 103.

[0023] This solution cooperates with the positioning groove 102 and the positioning plate 103 to ensure that when the honeycomb prefabricated pipe parts 1 with through holes 101 are spliced, the through holes 101 on adjacent honeycomb prefabricated pipe parts 1 are located on the same axis after splicing, so as to facilitate the splicing of the honeycomb prefabricated pipe parts 1 and ensure the alignment of the through holes 101.

[0024] In one embodiment of the present invention, baffles capable of blocking the openings of the honeycomb prefabricated pipe fittings 1 are threadedly connected on both sides of the honeycomb prefabricated pipe fittings 1. After each layer of flat pipe fittings is arranged, the baffles are threadedly connected to the openings on both sides of the honeycomb prefabricated pipe fittings 1 to block the honeycomb prefabricated pipe fittings 1. This prevents the backfill soil 203 from entering the honeycomb prefabricated pipe fittings 1 during the pouring process.

[0025] In one embodiment of the present invention, the baffle includes a first baffle 104 threadedly connected to the honeycomb prefabricated pipe 1 away from the backfill area 3 and a second baffle 105 threadedly connected to the honeycomb prefabricated pipe 1 close to the backfill area 3, the first baffle 104 is provided with a grouting port, the grouting port is threaded with a blocking block 106 capable of closing the grouting port, the second baffle 105 is slidably connected to an upper limit position with a piston 107, a spring 108 is fixedly connected between the piston 107 and the second baffle 105, a sliding rod 109 is fixedly connected to the piston 107, and the second baffle 105 is provided with a limiting hole 110 slidably connected to the sliding rod 109.

[0026] In the present scheme, for areas where the support strength requirements for the roadbed are high, in order to avoid damage to the hollow honeycomb prefabricated pipe fittings 1 caused by the high-strength load on the road surface during the operation of the roadbed, after the honeycomb prefabricated pipe fittings 1 are sealed by the baffle, the sealing block 106 located at the grouting port can be screwed out, and the grouting pipe can be connected through the grouting mechanism, and the grouting pipe can be inserted along the grouting port, and the grouting operation is performed using the grouting mechanism to make the hollow honeycomb prefabricated pipe fittings 1 solid, so as to improve the support capacity of the honeycomb prefabricated pipe fittings 1 and improve the stability of the roadbed structure; and during the grouting process, the slurry squeezes the piston 107, thereby compressing the spring 108, so as to drive the slide rod 109 to slide along the limit hole 110, so as to ensure that the slurry can fill the honeycomb prefabricated pipe fittings 1.

[0027] Finally, it should be noted that the above preferred embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail through the above preferred embodiments, those skilled in the art should understand that various changes can be made in form and details without departing from the scope defined by the claims of the present invention.

Claims

1. A combined honeycomb roadbed structure based on recycled concrete, comprising a pipe retaining structure formed by splicing a multi-layer flat pipe assembly, characterized in that: A backfill area for backfilling soil is formed between the pipe retaining structures, and the backfill area is in the shape of an isosceles trapezoid which is wide at the top and narrow at the bottom. Each layer of the flat pipe group includes a plurality of honeycomb prefabricated pipes arranged side by side in the horizontal direction, and the cross-section of the honeycomb prefabricated pipes is a regular hexagon. In the adjacent layers of the flat pipe groups, adjacent honeycomb prefabricated pipes are arranged in a close fit. The pipe retaining structure is divided into a plurality of backfill layers in the longitudinal direction, and each backfill layer includes a plurality of layers of the flat pipe groups. Two groups of limiting rod assemblies are arranged on the backfill layers, and the limiting rod assemblies include at least two limiting rods arranged axially along the honeycomb prefabricated pipes. The two groups of limiting rod assemblies are arranged in an X shape, and the limiting rods in each group of limiting rod assemblies penetrate the backfill layer in the vertical direction of the inclined surface of the honeycomb prefabricated pipe. The limiting rod assemblies in adjacent backfill layers form a diamond-shaped closed area in the cross section.

2. The combined honeycomb roadbed structure based on recycled concrete according to claim 1 is characterized in that: A through hole matching with the limiting rod is arranged on the honeycomb prefabricated pipe member for the limiting rod to pass through.

3. The combined honeycomb roadbed structure based on recycled concrete according to claim 2 is characterized in that: A threaded section is provided on the bottom end side of the limiting rod extending out of the backfill layer, a limiting block is fixedly provided on the side of the limiting rod away from the threaded section, the diameter of the limiting block is larger than the diameter of the limiting rod, the outer diameter of the threaded section is smaller than the diameter of the limiting rod, a nut is threadedly connected on the threaded section, and the threaded connection between the nut and the threaded section can fix multiple honeycomb prefabricated pipe fittings through which the limiting rod passes between the nut and the limit block.

4. The combined honeycomb roadbed structure based on recycled concrete according to claim 3 is characterized in that: A positioning groove is arranged on one side of the honeycomb prefabricated pipe, and a positioning plate cooperating with the positioning groove is arranged on a side opposite to the positioning groove of the honeycomb prefabricated pipe, and the through hole passes through the positioning groove and the positioning plate.

5. The combined honeycomb roadbed structure based on recycled concrete according to claim 4 is characterized in that: The construction method of the combined honeycomb roadbed structure based on recycled concrete comprises the following steps: S1, splicing the first backfill layer: multiple honeycomb prefabricated pipe fittings are installed side by side in the horizontal direction to form a first layer of flat pipe fittings group, and then the second layer of honeycomb prefabricated pipe fittings are installed between adjacent honeycomb prefabricated pipe fittings in the first layer of flat pipe fittings group to form a second layer of flat pipe fittings group, and multiple layers of flat pipe fitting groups are installed in sequence in the above manner to form the first backfill layer, wherein two groups of limiting rod assemblies are then obliquely penetrated through the honeycomb prefabricated pipe fittings from both ends of the top of the first backfill layer until they extend a preset distance from both ends of the bottom of the first backfill layer, and then the multiple honeycomb prefabricated pipe fittings through which the limiting rods pass are fixed between the nut and the limit block by threading the nut and the threaded section; S2, backfill the first backfill layer with soil, so that the backfill soil covers the limit rod extending from the bottom end of the first backfill layer, and a limit rod height extending from the bottom end of the second backfill layer is reserved between the backfill soil and the top of the first backfill layer, and compact 3 to 4 times after backfilling; S3, splicing the backfill layers in sequence according to steps S1 to S2 and backfilling the soil until a combined honeycomb roadbed structure based on recycled concrete is formed.

6. The combined honeycomb roadbed structure based on recycled concrete according to claim 5, characterized in that: The honeycomb prefabricated pipe is threadedly connected to the two sides with baffles capable of blocking the openings of the honeycomb prefabricated pipe. In step S1, after each layer of flat pipe groups is arranged, the baffles are threadedly connected to the openings on both sides of the honeycomb prefabricated pipe to block the honeycomb prefabricated pipe.

7. The combined honeycomb roadbed structure based on recycled concrete according to claim 6, characterized in that: The baffle comprises a first baffle threadedly connected to the honeycomb prefabricated pipe away from the backfill area and a second baffle threadedly connected to the honeycomb prefabricated pipe close to the backfill area, the first baffle is provided with a grouting port, a sealing block capable of closing the grouting port is threadedly connected to the grouting port, a piston is slidably connected to the upper limit position of the second baffle, a spring is fixedly connected between the piston and the second baffle, a sliding rod is fixedly connected to the piston, and a limiting hole slidably connected to the sliding rod is provided on the second baffle.

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