A lap joint structure of lightweight foam soil fill and roadbed

Abstract

The present invention discloses a lap joint structure of a lightweight foam soil fill and a roadbed, and relates to the technical field of pavement construction, including an original roadbed, a new roadbed, and a plurality of lap joint components for connecting the original roadbed and the new roadbed, wherein: a plurality of steps are arranged on one side of the original roadbed facing the new roadbed, a plurality of lap joint components are arranged one-to-one with the plurality of steps, and the two ends of the lap joint components are respectively fixedly connected with the steps and the new roadbed; the lap joint components include a lap joint frame and a movable strip, and the two ends of the lap joint frame are respectively fixedly connected with the steps and the new roadbed. The present invention is novel in design and simple in operation. Through the arrangement of the lap joint frame, a plurality of steps are opened on the original roadbed, the number of the lap joint frames arranged is the same as the number of the plurality of steps, and the specifications of the lap joint frames arranged meet the corresponding steps. The lap joint frame is used to connect the original roadbed and the new roadbed horizontally, so as to ensure that no cracks will occur between the original roadbed and the new roadbed after long-term use.

Description

Technical Field

[0001] The invention relates to the technical field of pavement construction, and in particular to an overlapping structure of a lightweight foam soil fill and a roadbed. Background Art

[0002] Foamed cement lightweight soil is a new type of lightweight thermal insulation material containing a large number of closed pores, which is formed by fully foaming the foaming agent mechanically through the foaming system of the bubble machine, and evenly mixing the foam with cement slurry, and then pouring it into place or forming it into a mold through the pumping system of the bubble machine, and then naturally curing it. It is a bubble-like thermal insulation material, and its outstanding feature is that it forms closed foam pores inside the concrete, making the concrete lighter and more thermally insulated. Foamed cement lightweight soil can be used to widen or repair the road surface.

[0003] The roadbed is the foundation of the track or road surface, and is a geotechnical structure formed by excavation or filling. With the development of society, the width of the existing roadbed cannot meet the traffic needs, so the existing roadbed needs to be widened or repaired.

[0004] When foam cement lightweight soil is used to widen or repair the original roadbed, steps are generally opened on the original roadbed. The setting of the steps increases the contact area with the new roadbed, thereby improving the connection between the original roadbed and the new roadbed joint surface. However, the lateral connection force and the longitudinal connection force between the original roadbed and the new roadbed cannot be guaranteed by the setting of steps alone. After the construction of the new roadbed is completed, after a long period of use, the new roadbed will show relative settlement with the original roadbed, affecting its use. Summary of the invention

[0005] The purpose of the present invention is to provide a lap joint structure of light foam soil filling and roadbed.

[0006] The technical problems solved by the present invention are:

[0007] (1) In the prior art, when connecting the original roadbed with the new roadbed, the connection contact area is simply increased by setting a step on the original roadbed. However, this setting has a poor lateral connection force between the original roadbed and the new roadbed. After long-term use, cracks are easily generated between the new roadbed and the original roadbed.

[0008] (2) When the original roadbed is connected to the new roadbed, there is no longitudinal connecting force between the new roadbed and the original roadbed. Therefore, after the new roadbed is connected to the original roadbed, the new roadbed is prone to relative settlement with the original roadbed during long-term use.

[0009] The purpose of the present invention can be achieved through the following technical solutions:

[0010] A lap joint structure of a lightweight foam soil fill and a roadbed, comprising an original roadbed, a new roadbed and a plurality of lap joint components for connecting the original roadbed and the new roadbed, wherein: a plurality of steps are arranged on one side of the original roadbed facing the new roadbed, a plurality of lap joint components are arranged correspondingly to the plurality of steps, and two ends of the lap joint components are fixedly connected to the steps and the new roadbed respectively;

[0011] The lap joint assembly includes a lap joint frame and a movable strip. The two ends of the lap joint frame are fixedly connected to the step and the new roadbed respectively. A plurality of connecting strips are arranged on the inner side of the lap joint frame. The plurality of connecting strips are arranged in parallel, and a gap is formed between any two adjacent connecting strips. The movable strips are detachably mounted on the plurality of connecting strips. The movable strips are provided in plurality, and the distance between any two adjacent movable strips is adjustable.

[0012] The lap joint assembly further comprises a longitudinal connector, which is arranged on the lap joint frame and is used to connect any two adjacent lap joint frames.

[0013] As a further solution of the present invention: the movable strips are arranged along the length direction of the vertically connected strips.

[0014] As a further solution of the present invention: a plurality of fixed blocks are fixedly connected to the bottom of the movable strip, the plurality of fixed blocks are arranged along the length direction of the movable strip, and the size of the fixed blocks is adapted to the size of the gap formed between any two adjacent connected strips.

[0015] As a further solution of the present invention: the longitudinal connecting member includes a rotating rod and a fixed pin arranged on the same side of the lap frame, one end of the rotating rod is rotatably installed on the side of the lap frame, and the other end of the rotating rod is provided with a groove, the fixed pin is fixedly installed on the side of the lap frame, and the outer circumference of the fixed pin is adapted to the size of the groove.

[0016] As a further solution of the present invention: the lap joint assembly also includes a plurality of fixing parts, and the plurality of fixing parts are arranged on the lap joint frame. The fixing parts include a gripping anchor rod, and a ring is arranged on the gripping anchor rod. Two L-shaped rods are fixedly installed on the outer circumference of the ring. A clamping area with a fixed distance is formed between the L-shaped rod and the ring, and the width of the connecting strip is adapted to the size of the clamping area.

[0017] As a further solution of the present invention: the ground-gripping anchor rod is provided with an external thread, the inner side of the collar is provided with an internal thread matching the external thread, and the collar is mounted on the ground-gripping anchor rod via the internal thread.

[0018] As a further solution of the present invention: two rotating rods and two fixing pins are provided on the same side of the lap frame, and the two fixing pins are located between the two rotating rods.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] 1. Through the setting of overlapping frames, multiple steps are opened on the original roadbed. The number of overlapping frames is the same as the number of steps, and the specifications of the overlapping frames are consistent with the corresponding steps. The overlapping frames are used to connect the original roadbed and the new roadbed horizontally to ensure that there will be no cracks between the original roadbed and the new roadbed after long-term use;

[0021] 2. By arranging longitudinal connectors on the lap frame, after the lap frame is used to connect the step and the new roadbed horizontally, any two adjacent lap frames can be longitudinally connected by the longitudinal connector, so that there is a longitudinal connection force between the two lap frames, ensuring the overall stability of the new roadbed, so that there will be no relative settlement between the new roadbed and the original roadbed;

[0022] 3. Through the setting of the fixing parts, for the fixation between the lap frame and the step, the height of the ring on the gripping anchor rod is adjustable, thereby adjusting the height of the clamping area formed between the L-shaped rod and the outer circumference of the ring on the gripping anchor rod, so that the clamping area can adapt to different steps to fix the lap frame at different depths. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The present invention will be further described below in conjunction with the accompanying drawings.

[0024] Figure 1 It is a cross-sectional structural schematic diagram of the present invention;

[0025] Figure 2 This is a schematic diagram of the overall structure of the lap frame in the present invention. Figure 1 ;

[0026] Figure 3 This is a schematic diagram of the overall structure of the lap frame in the present invention. Figure 2 ;

[0027] Figure 4 This is a schematic diagram of the overall structure of the lap frame in the present invention. Figure 3 ;

[0028] Figure 5 yes Figure 2 A is an enlarged structural diagram;

[0029] Figure 6 It is a schematic diagram of the overall structure of the movable strip in the present invention;

[0030] Figure 7 It is a schematic diagram of the overall structure of the first embodiment of the fixing member in the present invention;

[0031] Figure 8is a schematic diagram of the overall structure of a second embodiment of a fixing member in the present invention;

[0032] Fig. 9 It is a schematic diagram of the overall structure of the original roadbed in the present invention.

[0033] In the figure: 1. original roadbed; 2. new roadbed; 3. overlapping assembly; 4. step; 5. overlapping frame; 6. movable strip; 7. connecting strip; 8. fixing block; 9. rotating rod; 10. fixing pin; 11. groove; 12. fixing piece; 13. ground anchor rod; 14. collar; 15. L-shaped rod; 16. external thread; 17. base layer; 18. gravel base layer; 19. cement stabilized gravel base layer; 20. foam cement lightweight soil layer. DETAILED DESCRIPTION

[0034] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0035] Embodiment 1:

[0036] like Figure 1-Figure 7 and Fig. 9 As shown, a lap joint structure of a lightweight foam soil fill and a roadbed includes an original roadbed 1 and a new roadbed 2, and a plurality of lap joint components 3 are arranged between the original roadbed 1 and the new roadbed 2. The lap joint components 3 are used to increase the fixed connection between the original roadbed 1 and the new roadbed 2, to ensure that there are lateral and longitudinal connecting forces between the original roadbed 1 and the new roadbed 2, and to ensure that no cracks are generated between the original roadbed 1 and the new roadbed 2 and no relative settlement occurs during the use of the two.

[0037] like Figure 1 and Fig. 9 As shown, a plurality of steps 4 are provided on the side of the original roadbed 1 facing the new roadbed 2, specifically three steps 4 are provided, and correspondingly, three overlap groups 3 are provided, and the three overlap components 3 are respectively provided in one-to-one correspondence with the three steps 4, and the two ends of the overlap components 3 are respectively fixedly connected to the steps 4 and the new roadbed 2. The plurality of overlap components 3 can be provided with corresponding specifications according to the actual overlap positions, such as Figure 1 As shown, the sizes of the overlapping components 3 are gradually increased from bottom to top.

[0038] The lap joint assembly 3 mentioned above includes a lap joint frame 5 and a plurality of movable strips 6. A plurality of connecting strips 7 are fixedly connected to the inner side of the lap joint frame 5. The plurality of connecting strips 7 are arranged in parallel and are evenly arranged on the inner side of the lap joint frame 5. A fixed gap is formed between any two adjacent connecting strips 7. The movable strips 6 are detachably mounted on the plurality of connecting strips 7. When in use, a plurality of movable strips 6 can be mounted on the connecting strips 7. The distance between any two adjacent movable strips 6 can be adjusted. This arrangement enables the lap joint frame 5 to carry different types of construction materials when it is arranged on different steps 4 without material leakage. The number of movable strips 6 can be set according to actual needs. At the same time, the lap joint frame 5 is arranged so that the two ends of the lap joint frame 5 are fixedly connected to the step 4 and the new roadbed 2 respectively. On the basis of the original step 4, the lateral connection force between the original roadbed 1 and the new roadbed 2 is further increased to ensure that no cracks will occur between the original roadbed 1 and the new roadbed 2. Figure 1 As shown, the three overlapping frames 5 are enlarged from bottom to top according to corresponding proportions.

[0039] like Figure 3 and Figure 6 As shown, in order to facilitate the movable strip 6 to slide smoothly on the connecting strip 7, for the position setting between the movable strip 6 and the connecting strip 7, the movable strip 6 can be arranged along the length direction of the vertical connecting strip 7; at the same time, a plurality of fixed blocks 8 are fixedly connected to the bottom of the movable strip 6, and the plurality of fixed blocks 8 are arranged along the length direction of the movable strip 6, and the plurality of fixed blocks 8 are evenly arranged. The size of the fixed blocks 8 is adapted to the size of the gap formed between any two adjacent connecting strips 7 mentioned above, and then the fixed blocks 8 can be inserted into the gap. When construction materials are added above them, the movable strip 6 and the connecting strip 7 are relatively stable, further ensuring that the construction materials carried thereon will not leak.

[0040] The above-mentioned lap joint assembly 3 also includes a longitudinal connector, which is arranged on the lap joint frame 5. When multiple lap joint frames 5 are arranged on the corresponding steps 4, the longitudinal connector can longitudinally connect any two adjacent lap joint frames 5 to ensure the longitudinal connection force between the two lap joint frames 5, and ensure that no relative settlement occurs between the original roadbed 1 and the new roadbed 2.

[0041] Specifically, the longitudinal connection member includes a rotating rod 9 and a fixing pin 10 arranged on the same side of the lap frame 5. One end of the rotating rod 9 is rotatably mounted on the side of the lap frame 5, and the other end of the rotating rod 9 is provided with a groove 11. As for the setting of the fixing pin 10, the fixing pin 10 is fixedly mounted on the side of the lap frame 5. When multiple lap frames 5 are arranged on the corresponding steps 4, the rotating rod 9 on the lower lap frame 5 can be driven to rotate, so that the groove 11 on the rotating rod 9 can be clamped on the fixing pin 10 on the upper lap frame 5. Through the rotating rod 9 of the lower lap frame 5 and the fixing pin 10 of the upper lap frame 5, the upper and lower lap frames 5 are longitudinally connected, so that there is a longitudinal connection force between the upper and lower lap frames 5. In order to better enhance the longitudinal connection force between the upper and lower lap frames 5, two rotating rods 9 and two fixing pins 10 are provided on the same side of the lap frame 5, and the two fixing pins 10 are located between the two rotating rods 9. When in use, the same side of the upper lap frame 5 can be longitudinally connected by the two rotating rods 9 on the lower lap frame 5, and the force is evenly distributed.

[0042] like Figure 2 and Figure 5 as well as Figure 7 As shown, in order to ensure the stable connection between the two ends of the lap frame 5 and the step 4 and the new roadbed 2 respectively, the lap assembly 3 also includes a plurality of fixings 12, and the plurality of fixings 12 are evenly arranged on the lap frame 5. When the lap frame 5 needs to be fixed to the step 4, the fixings 12 can be used to connect the lap frame 5 to the step 4. Specifically, the fixing member 12 includes a gripping anchor rod 13, on which a collar 14 is fixedly provided, and on the outer circumference of the collar 14, two L-shaped rods 15 are fixedly installed, wherein a clamping area with a fixed distance is formed between the L-shaped rod 15 and the outer circumference of the collar 14, and the size of the clamping area is set to be adapted to the width of the connecting strip 7, and then when the lap frame 5 is set on the step 4, the staff can insert the gripping anchor rod 13 into the gap formed by any two adjacent connecting strips 7, and the two adjacent connecting strips 7 will be placed in the two clamping areas respectively, and when the staff drives the gripping anchor rod 13 to move downward, the clamping area will press and lock the connecting strip 7, and under the action of multiple fixing members 12, the lap frame 5 will be stably locked on the step 4.

[0043] Embodiment 2:

[0044] The difference between this embodiment and the first embodiment is that Figure 8As shown, an external thread 16 is provided on the gripping anchor 13, and an internal thread is provided on the inner side of the collar 14, and the internal thread is adapted to the external thread 16, and then the collar 14 is installed on the gripping anchor 13 through the internal thread. When the gripping anchor 13 is needed to fix the lap frame 5, the position of the collar 14 on the gripping anchor 13 can be adjusted according to the different steps 4, that is, the height of the clamping area formed between the L-shaped rod 15 and the outer circumference of the collar 14 on the gripping anchor 13 is adjusted, so that the clamping area can adapt to different steps 4 to fix the lap frame 5 at different depths.

[0045] The working principle of the present invention is as follows: when overlapping the original roadbed 1 and the new roadbed 2, three steps 4 can be opened on one side of the original roadbed 1, and corresponding construction materials are laid on the three steps 4 from bottom to top. After the corresponding construction materials are laid, a base layer 17, a crushed stone base layer 18, a cement-stabilized crushed stone base layer 19 and a foamed cement lightweight soil layer 20 are formed in sequence. The formed base layer 17, crushed stone base layer 18, cement-stabilized crushed stone base layer 19 and foamed cement lightweight soil layer 20 constitute the new roadbed 2, and the three steps 4 are called the first step, the second step and the third step in sequence from bottom to top. The base layer 17 is flush with the first step, and then the lap frame 5 is placed above the base layer 17 and the first step, and then a plurality of movable strips 6 are installed on the lap frame 5. The number of the plurality of movable strips 6 is set according to the construction materials to be laid thereon. According to the setting of the number of movable strips 6, the distance formed between any two adjacent movable strips 6 can be changed to facilitate the bearing of the construction materials to be applied thereon. Then, the lap frame 5 is evenly force-bearingly installed on the first step and the base layer 17 using the gripping anchor rods 13. After the installation is completed, the corresponding construction materials are laid on the lap frame 5. To form a crushed stone base layer 18, the formed crushed stone base layer 18 is flush with the second step, and then another specification of the lap frame 5 is placed on the crushed stone base layer 18, and a corresponding number of movable strips 6 are installed on the lap frame 5. The distance between any two adjacent movable strips 6 can carry the construction materials to be laid on them. Then, the lap frame 5 is fixed to the second step and the crushed stone base layer 18 by using the gripping anchor rod 13. After the fixing is completed, the rotating rod 9 on the lower lap frame 5 can be rotated to a corresponding angle, so that the groove 11 on the rotating rod 9 is clamped on the lap frame 5 that has just been fixed (that is, Figure 1The lap frame 5 is fixed to the fixing pin 10 on the middle lap frame (as shown in the figure), so that the lap frame 5 can generate a longitudinal connection force between the lap frame 5 and the lap frame 5 below it; then the corresponding construction materials are laid on the second lap frame 5 to form a cement-stabilized gravel base layer 19, and the formed cement-stabilized gravel base layer 19 is flush with the third step; then the lap frame 5 is placed above the cement-stabilized gravel base layer 19, and a corresponding number of movable strips 6 are installed on the lap frame 5. The distance set between any two adjacent movable strips 6 can carry the construction materials to be laid above them, and then the lap frame 5 is fixed to the third step and the cement-stabilized gravel base layer 19 by using the gripping anchor rod 13. After the fixing is completed, the rotating rod 9 on the middle lap frame 5 is rotated to a corresponding angle, so that the groove 11 on the rotating rod 9 is clamped on the lap frame 5 (that is, Figure 1 As shown in the figure, the fixing pin 10 on the upper lap frame 5 is placed on the lap frame 5, so that a longitudinal connecting force can be generated between the lap frame 5 and the lap frame 5 below it; then, the corresponding construction materials are laid on the third lap frame 5 to form a foam cement lightweight soil layer 20, that is, the lap joint of the original roadbed 1 and the new roadbed 2 is completed.

[0046] The above is a detailed description of an embodiment of the present invention, but the content is only a preferred embodiment of the present invention and cannot be considered to limit the scope of implementation of the present invention. All equivalent changes and improvements made within the scope of the present invention should still fall within the scope of the patent coverage of the present invention.

Claims

1. A lap joint structure of lightweight foam soil fill and roadbed, characterized in that: The invention comprises an original roadbed (1), a new roadbed (2), and a plurality of overlapping components (3) for connecting the original roadbed (1) and the new roadbed (2), wherein: a plurality of steps (4) are arranged on the side of the original roadbed (1) facing the new roadbed (2), the plurality of overlapping components (3) are arranged in a one-to-one correspondence with the plurality of steps (4), and the two ends of the overlapping components (3) are fixedly connected to the steps (4) and the new roadbed (2) respectively; The lap joint assembly (3) comprises a lap joint frame (5) and a movable strip (6), the two ends of the lap joint frame (5) are respectively fixedly connected to the step (4) and the new roadbed (2), a plurality of connecting strips (7) are arranged on the inner side of the lap joint frame (5), the plurality of connecting strips (7) are arranged in parallel, and a gap is formed between any two adjacent connecting strips (7); the movable strip (6) is detachably mounted on the plurality of connecting strips (7), the movable strips (6) are arranged in plurality, and the distance between any two adjacent movable strips (6) is adjustable; The lap joint assembly (3) further comprises a longitudinal connecting piece, which is arranged on the lap joint frame (5) and is used to connect any two adjacent lap joint frames (5); The longitudinal connecting member comprises a rotating rod (9) and a fixing pin (10) arranged on the same side of the lap frame (5); one end of the rotating rod (9) is rotatably mounted on the side of the lap frame (5); the other end of the rotating rod (9) is provided with a groove (11); the fixing pin (10) is fixedly mounted on the side of the lap frame (5); and the outer circumference of the fixing pin (10) is adapted to the size of the groove (11).

2. The overlapping structure of lightweight foam soil fill and roadbed according to claim 1 is characterized in that: The movable strips (6) are arranged along the length direction of the vertical connecting strips (7).

3. The overlapping structure of lightweight foam soil fill and roadbed according to claim 2, characterized in that: A plurality of fixed blocks (8) are fixedly connected to the bottom of the movable strip (6), the plurality of fixed blocks (8) are arranged along the length direction of the movable strip (6), and the size of the fixed blocks (8) is adapted to the size of the gap formed between any two adjacent connecting strips (7).

4. A lap joint structure of lightweight foam soil fill and roadbed according to any one of claims 1 to 3, characterized in that: The lap joint assembly (3) further comprises a plurality of fixing members (12), the plurality of fixing members (12) being arranged on the lap joint frame (5), the fixing members (12) comprising a ground gripping anchor rod (13), the ground gripping anchor rod (13) being provided with a collar (14), two L-shaped rods (15) being fixedly mounted on the outer circumference of the collar (14), a clamping area with a fixed distance being formed between the L-shaped rod (15) and the collar (14), and the width of the connecting strip (7) being adapted to the size of the clamping area.

5. The overlapping structure of lightweight foam soil fill and roadbed according to claim 4, characterized in that: The gripping anchor rod (13) is provided with an external thread (16), the inner side of the collar (14) is provided with an internal thread matching the external thread (16), and the collar (14) is mounted on the gripping anchor rod (13) via the internal thread.

6. The overlapping structure of lightweight foam soil fill and roadbed according to claim 1, characterized in that: Two rotating rods (9) and two fixing pins (10) are provided on the same side of the lap frame (5), and the two fixing pins (10) are located between the two rotating rods (9).

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