A construction method for splicing joints between new and old roadbed base courses

Abstract

This application relates to a construction method for splicing joints between new and old roadbed base courses, belonging to the technical field of new and old roadbed splicing construction. It includes the following steps: S1: Marking the location of the road splice joint; S2: Removing the cement slab within the shoulder area of ​​the old road surface and laying an asphalt layer on top; S3: Excavating steps at the joint of the old road surface to facilitate lateral splicing with the new road surface; S4: Laying a subbase and base course; S5: Pouring a concrete layer at the joint between the new and old road surfaces and reinforcing it with a reinforcement mechanism to improve the connection strength between the new and old road surfaces; then laying the base course; S6: Laying the asphalt surface course. This application has the effect of extending the service life of the old road surface.

Description

Technical Field

[0001] This application relates to the field of splicing construction of new and old roadbeds, and in particular to a construction method for splicing joints of new and old roadbed base courses. Background Technology

[0002] With the rapid development of my country's transportation industry, the traffic volume of highways and municipal roads has increased year by year. Many roads have reached or are approaching saturation in terms of traffic volume before they have reached the end of their service life. The improvement measures for saturated highways are basically two: one is to build a double road, and the other is to expand and widen the existing highway.

[0003] Expansion requires splicing the old and new road surfaces to complete the road expansion. However, this is usually done by simply pouring concrete to fix the new and old road surfaces together. Once the old road surface is subjected to a large load, and due to its long-term use, stress concentration will occur at the structural edges of the old road surface, which will shorten its lifespan and make it prone to cracking and separation from the new road surface. Summary of the Invention

[0004] To address the issue of stress concentration at the structural edges of old road surfaces, which can shorten their lifespan and cause cracks and separation from new road surfaces, this application provides a construction method for splicing joints between new and old roadbed base courses.

[0005] This application provides a construction method for splicing joints between new and old roadbed base courses, employing the following technical solution:

[0006] A construction method for splicing joints between new and old roadbed base courses includes the following steps:

[0007] S1: Locate the joint positions of the road surface;

[0008] S2: Remove the cement slabs within the shoulder area of ​​the old road surface and lay an asphalt layer on top;

[0009] S3: Steps are excavated at the joints of the old road surface to facilitate lateral splicing with the new road surface;

[0010] S4: Laying the subbase and base layer;

[0011] S5: A concrete layer is poured at the joint between the new and old road surfaces, and a reinforcement mechanism is used to improve the connection strength between the new and old road surfaces; then the base course is laid.

[0012] S6: Lay asphalt surface layer.

[0013] By adopting the above technical solution, the reinforcement mechanism fixes the new road surface to the old road surface. Thus, once the old road surface is stressed due to load, it can be transferred to the new road surface through the reinforcement mechanism. As a result, the stress at the structural edge of the old road surface is less likely to concentrate, thereby extending the service life of the old road surface and making it less likely to crack and separate from the new road surface.

[0014] Optionally, the side wall of the step is provided with a connection hole, and the reinforcement mechanism includes a connection component, which includes a sleeve and a connecting steel bar. One end of the sleeve is disposed in the connection hole and the other end is fixed to the concrete layer. One end of the connecting steel bar is disposed in the sleeve and the other end is fixed to the concrete layer.

[0015] By adopting the above technical solution, the connecting steel bars fix the new pavement to the old pavement. Thus, once the old pavement is stressed due to load, the stress can be transferred to the new pavement through the sleeve and connecting steel bars. As a result, the stress at the structural edge of the old pavement is less likely to concentrate, thereby extending the service life of the old pavement and making it less likely to crack and separate from the new pavement.

[0016] Optionally, the sleeve has a slurry inlet hole and a plurality of slurry outlet holes communicating with the slurry inlet hole. The outer wall of the sleeve has a support hole. The reinforcement mechanism further includes a support assembly, which includes a support rod and a support spring. One end of the support rod is disposed in the support hole, and the other end abuts against the inner wall of the connecting hole. The support spring is fixed between the support rod and the bottom of the support hole.

[0017] By adopting the above technical solution, the support rod extends outward from the support hole through the elastic force of the support spring until it abuts against the inner wall of the sleeve to support the sleeve. The sleeve is supported until it is coaxial with the connecting hole, thus allowing a gap to be left between the sleeve and the inner wall of the connecting hole. In this way, when pouring the concrete layer, concrete slurry can be injected into the slurry hole and then injected into the space between the sleeve and the inner wall of the connecting hole through the slurry outlet. Due to the existence of the gap, more concrete slurry can be filled between the sleeve and the inner wall of the connecting hole, thereby improving the stability of the sleeve fixation.

[0018] Optionally, a connecting hole is provided between the slurry inlet hole and the support hole.

[0019] By adopting the above technical solution, the concrete grout will enter the support hole through the connecting hole. As it is continuously injected, the concrete grout will squeeze the support rod, so that the support rod and the inner wall of the connecting hole will be more tightly pressed, thereby indirectly increasing the friction between the sleeve and the inner wall of the connecting hole, so as to improve the stability of the sleeve inserted into the connecting hole.

[0020] Optionally, the reinforcement mechanism further includes a reinforcing component, which includes vertical reinforcing bars and horizontal reinforcing bars. The vertical reinforcing bars are fixed to the concrete layer and to the connecting reinforcing bars, and the horizontal reinforcing bars are fixed to the ends of the vertical reinforcing bars.

[0021] By adopting the above technical solution, vertical reinforcement can improve the stability of the connection between the connecting reinforcement and the concrete layer, making it less likely to separate laterally, thereby improving the stability of the connection between the new pavement and the old pavement.

[0022] Optionally, the reinforcing component further includes: a reinforcing bar, which is fixed between the vertical reinforcing bar and the connecting reinforcing bar, and between the connecting reinforcing bar and the sleeve.

[0023] By adopting the above technical solutions, the reinforcement of the steel bars can improve the connection strength between the connecting steel bars and the sleeve and vertical steel bars.

[0024] Optionally, the connecting steel bars are provided with a reaction component to react to the settlement of the new road surface or the old road surface.

[0025] By adopting the above technical solution, once the reaction component reacts, it proves that the new or old road surface has settled and needs to be maintained in time to prevent the new and old road surfaces from breaking apart.

[0026] Optionally, the reaction assembly includes a steel pipe and an oil level sensor, wherein the steel pipe is fixed between the reinforcing bar connected to the vertical reinforcing bar and the reinforcing bar connected to the sleeve, and the steel pipe is fixed to the steel pipe for filling with oil, and the oil level sensor is fixed to the steel pipe.

[0027] By adopting the above technical solution, once the oil level sensor detects a change in the oil level, it proves that the new or old road surface has settled and needs to be maintained in time to prevent the new and old road surfaces from breaking apart.

[0028] Optionally, the inner wall of the sleeve is provided with a grouting hole communicating with the grout inlet hole, and a clamping assembly for clamping the connecting steel bar is provided inside the sleeve.

[0029] By adopting the above technical solution, the clamping component can clamp the connecting steel bar, thereby allowing a gap to be left between the connecting steel bar and the inner wall of the sleeve.

[0030] Optionally, the clamping assembly includes a clamping arc plate and a compression spring, one end of the compression spring being fixed to the inner wall of the sleeve and the other end being fixed to the clamping arc plate, and the connecting steel bar passing through the clamping arc plate.

[0031] By adopting the above technical solution, the connecting steel bar is inserted into the sleeve and passes between two clamping arc plates to clamp the connecting steel bar, thereby leaving a gap between the connecting steel bar and the inner wall of the sleeve to fill more concrete grout, thus improving the stability of fixing the connecting steel bar; and connecting steel bars of any diameter can be selected and inserted into the sleeve for clamping.

[0032] In summary, this application includes at least one of the following beneficial effects:

[0033] 1. The connecting steel bars fix the new pavement to the old pavement. So that once the old pavement is stressed by the load, it can be transferred to the new pavement through the sleeve and connecting steel bars. As a result, the stress at the edge of the old pavement structure is not easy to concentrate, thus extending the service life of the old pavement and making it less likely to crack and separate from the new pavement.

[0034] 2. Insert the connecting steel bar into the sleeve, and pass the connecting steel bar between the two clamping arc plates to clamp the connecting steel bar, so that there is a gap between the connecting steel bar and the inner wall of the sleeve, so as to fill more concrete grout, thereby improving the stability of fixing the connecting steel bar; and connecting steel bars of any diameter can be selected and inserted into the sleeve for clamping.

[0035] 3. Once the oil level sensor detects a change in the oil level, it indicates that the new or old road surface has settled, requiring timely maintenance to prevent breakage between the new and old road surfaces. Attached Figure Description

[0036] Figure 1 This is a schematic diagram of the structure of an embodiment of this application;

[0037] Figure 2 for Figure 1 A magnified view of part A in the middle.

[0038] In the diagram: 1. Old road surface; 11. Step; 12. Connecting hole; 2. New road surface; 21. Subbase; 22. Subbase course; 23. Base course; 24. Concrete layer; 25. Asphalt surface course; 3. Connecting component; 31. Sleeve; 311. Grout inlet hole; 312. Grout outlet hole; 313. Support hole; 314. Connecting hole; 315. Grout filling hole; 32. Connecting reinforcing bar; 4. Support component; 41. Support rod; 42. Support spring; 5. Reinforcing component; 51. Vertical reinforcing bar; 52. Horizontal reinforcing bar; 53. Reinforcing bar; 6. Reaction component; 61. Steel pipe; 62. Oil level sensor; 7. Clamping component; 71. Clamping arc plate; 72. Compression spring. Detailed Implementation

[0039] The following is in conjunction with the appendix Figure 1-2 This application will be described in further detail.

[0040] This application discloses a construction method for splicing joints between new and old roadbed base courses.

[0041] A construction method for splicing joints between new and old roadbed base courses includes the following steps:

[0042] S1: Locate the joints of the road surface;

[0043] S2: Remove the cement slabs within the shoulder area of ​​the old road surface and lay an asphalt layer on top;

[0044] S3: Step 11 is excavated at the joint of the old road surface 1 to facilitate the lateral splicing with the new road surface 2;

[0045] S4: Lay geogrids at the bottom. Geogrids can not only help increase the bearing capacity of the foundation and effectively extend the service life of the foundation, but also effectively prevent the ground from cracking or collapsing, thus ensuring that the ground can remain beautiful and flat; then pour sand-free large-pore concrete at the joint between the new road surface 2 and the old road surface 1, and finally lay the subbase 21 and the base course 22.

[0046] S5: A concrete layer 24 is poured at the joint between the new road surface 2 and the old road surface 1, and the concrete layer 24 is located above the sand-free large-pore concrete. The reinforcement mechanism is used to improve the connection strength between the new road surface 2 and the old road surface 1. Finally, the base layer 23 is laid.

[0047] S6: Lay an asphalt surface layer of 25.

[0048] Reference Figure 1 and Figure 2 The reinforcement mechanism includes: connection component 3, support component 4 and reinforcement component 5.

[0049] Reference Figure 1A connecting hole 12 is provided on the side of the step 11 near the concrete layer 24. The connecting component 3 includes a sleeve 31 and a connecting steel bar 32. One end of the sleeve 31 is disposed in the connecting hole 12, and the other end is fixed in the concrete layer 24. In this embodiment, one end of the sleeve 31 is closed, and the other end is open. One end of the connecting steel bar 32 is disposed in the sleeve 31, and the other end is fixed in the concrete layer 24. Before pouring the concrete layer 24, the sleeve 31 is first inserted into the connecting hole 12, and then one end of the connecting steel bar 32 is inserted into the sleeve 31. Then, the concrete layer 24 is poured at the joint between the new road surface 2 and the old road surface 1. During the pouring of the concrete layer 24, the concrete slurry will slowly seep into the space between the sleeve 31 and the inner wall of the connecting hole 12 and into the sleeve 31 until the concrete slurry solidifies, thus fixing the new road surface 2 and the old road surface 1 together. Therefore, if the old road surface 1 is stressed due to load, the stress can be transferred to the new road surface 2 through the sleeve 31 and the connecting steel bar 32. This prevents stress concentration at the structural edge of the old road surface 1, extending its service life and making it less likely to crack and separate from the new road surface 2. Even if the new road surface 2 or the old road surface 1 experiences slight settlement, the connecting steel bar 32 will prevent the new road surface 2 from quickly separating from the old road surface 1. In this embodiment, the connecting steel bars 32 can be evenly distributed along the length of the new road surface 2.

[0050] Reference Figure 2 The outer wall of the sleeve 31 is provided with a slurry inlet hole 311, which extends along the wall thickness of the sleeve 31. The outer wall of the sleeve 31 is also provided with a slurry outlet hole 312 communicating with the slurry inlet hole 311 along the axial direction of the sleeve 31. A support hole 313 is also provided on the outer wall of the sleeve 31.

[0051] Reference Figure 2 In this embodiment, the support components 4 are configured in four groups, and the four groups of support components 4 are evenly distributed along the circumference of the sleeve 31, that is, they are set at the top, bottom and both sides of the sleeve 31. The support components 4 include: a support rod 41 and a support spring 42. One end of the support rod 41 is disposed in the support hole 313, and the other end abuts against the inner wall of the connecting hole 12. One end of the support spring 42 is fixed to the end wall of the end of the support rod 41 located in the support hole 313, and the other end is fixed to the bottom of the support hole 313. In this embodiment, the elastic force of the support spring 42 located at the bottom of the sleeve 31 is greater than that of the other support springs 42, because it needs to overcome the weight of the sleeve 31 and the connecting steel bar 32.

[0052] Before pouring the concrete layer 24, the support rod 41 is pressed into the support hole 313, and then the sleeve 31 is inserted into the connection hole 12. At this time, the support rod 41 extends out of the support hole 313 through the elastic force of the support spring 42 until it abuts against the inner wall of the sleeve 31 to support the sleeve 31. The sleeve 31 is supported until it is coaxial with the connection hole 12, so that there is a gap between the sleeve 31 and the inner wall of the connection hole 12. In this way, when pouring the concrete layer 24, the concrete slurry can be injected into the slurry inlet hole 311 and then injected into the space between the sleeve 31 and the inner wall of the connection hole 12 through the slurry outlet hole 312. Due to the existence of the gap, more concrete slurry can be filled between the sleeve 31 and the inner wall of the connection hole 12, thereby improving the stability of fixing the sleeve 31.

[0053] Reference Figure 2 Furthermore, a connecting hole 314 is provided between the grout inlet hole 311 and the support hole 313, and the connection between the connecting hole 314 and the support hole 313 is located at the bottom of the support hole 313. When concrete grout is injected into the grout inlet hole 311, the concrete grout will enter the support hole 313 through the connecting hole 314. With continuous injection, the concrete grout will squeeze the support rod 41, so that the support rod 41 abuts more tightly against the inner wall of the connecting hole 12, thereby indirectly increasing the friction between the sleeve 31 and the inner wall of the connecting hole 12, so as to improve the stability of the sleeve 31 inserted into the connecting hole 12.

[0054] Reference Figure 2 Specifically, the inner wall of the sleeve 31 is provided with a grouting hole 315 communicating with the grout inlet hole 311. A clamping assembly 7 is provided inside the sleeve 31. The clamping assembly 7 includes a clamping arc plate 71 and a compression spring 72, and each clamping arc plate 71 and compression spring 72 in a set of clamping assemblies 7 is configured as a pair, corresponding one-to-one. One end of the compression spring 72 is fixed to the inner wall of the sleeve 31, and the other end is fixed to the clamping arc plate 71. Before inserting the sleeve 31 into the connecting hole 12, the connecting steel bar 32 is first inserted into the sleeve 31, and the connecting steel bar 32 passes between the two clamping arc plates 71 to clamp the connecting steel bar 32, thereby allowing a gap between the connecting steel bar 32 and the inner wall of the sleeve 31 to fill with more concrete grout, thus improving the stability of fixing the connecting steel bar 32; and connecting steel bars 32 of any diameter can be inserted into the sleeve 31 for clamping.

[0055] Reference Figure 1The reinforcing component 5 includes: vertical reinforcing bars 51, horizontal reinforcing bars 52, and reinforcing bars 53. The vertical reinforcing bars 51 are fixed within the concrete layer 24. The ends of the vertical reinforcing bars 51 and 32 are welded together, with the vertical reinforcing bars 51 and 32 perpendicular to each other. The vertical reinforcing bars 51 improve the stability of the connection between the connecting bars 32 and the concrete layer 24, preventing lateral separation and thus enhancing the stability of the connection between the new pavement 2 and the old pavement 1. The horizontal reinforcing bars 52 are welded to the ends of the vertical reinforcing bars 51, and are perpendicular to the vertical reinforcing bars 51.

[0056] Reference Figure 1 The reinforcing steel bar 53 is welded between the vertical reinforcing bar 32 and the connecting steel bar 32, and is set at an angle. The sleeve 31 and the connecting steel bar 32 are also provided with reinforcing steel bars 53, which can improve the connection strength between the connecting steel bar 32 and the sleeve 31 and the vertical reinforcing bar 51.

[0057] Reference Figure 1 A reaction component 6 is provided on the connecting steel bar 32. The reaction component 6 includes a steel pipe 61 and an oil level sensor 62. The steel pipe 61 is welded between the reinforcing steel bar 53 connected to the vertical steel bar 51 and the reinforcing steel bar 53 connected to the sleeve 31, thereby further improving the connection strength between the connecting steel bar 32 and the sleeve 31 and the vertical steel bar 51. In this embodiment, both ends of the steel pipe 61 are set as closed openings for filling with oil. The oil level sensor 62 is fixed on the steel pipe 61 to detect changes in the oil level. In this embodiment, the oil level sensor 62 can be externally connected to the headquarters that controls the streetlights to turn on or off, and an alarm can be installed at the headquarters. Once a change in the oil level is detected, it proves that the new road surface 2 or the old road surface 1 has settled and needs to be maintained in time to prevent the new road surface 2 from breaking with the old road surface 1.

[0058] The implementation principle of the construction method for the splicing joint of the new and old roadbed base in this application embodiment is as follows: Before pouring the concrete layer 24, the sleeve 31 is first inserted into the connecting hole 12, and then one end of the connecting steel bar 32 is inserted into the sleeve 31; then the concrete layer 24 is poured at the joint between the new road surface 2 and the old road surface 1. During the pouring of the concrete layer 24, the concrete slurry will slowly seep into the space between the sleeve 31 and the inner wall of the connecting hole 12 and into the sleeve 31 until the concrete slurry solidifies, so as to fix the new road surface 2 and the old road surface 1. Thus, once the old road surface 1 generates stress due to load, it can be transferred to the new road surface 2 through the sleeve 31 and the connecting steel bar 32. Thus, the stress at the structural edge of the old road surface 1 is not prone to concentration, thereby extending the service life of the old road surface 1 and making it less likely to crack and separate from the new road surface 2. Even if the new road surface 2 or the old road surface 1 experiences slight settlement, the new road surface 2 and the old road surface 1 are not prone to rapid separation due to the setting of the connecting steel bar 32.

[0059] The above are all preferred embodiments of this application and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A construction method for splicing joints between new and old roadbed base courses, characterized in that, Includes the following steps: S1: Locate the joint positions of the road surface; S2: Remove the cement slabs within the shoulder area of ​​the old road surface (1) and lay an asphalt layer on top; S3: Steps (11) are excavated at the joint of the old road surface (1) to facilitate the horizontal splicing with the new road surface (2); S4: Lay the subbase (21) and base course (22); S5: A concrete layer (24) is poured at the joint between the new road surface (2) and the old road surface (1), and reinforced by a reinforcement mechanism to improve the connection strength between the new road surface (2) and the old road surface (1); then the base layer (23) is laid. S6: Lay asphalt surface layer (25); The side wall of the step (11) is provided with a connection hole (12). The reinforcement mechanism includes a connection component (3). The connection component (3) includes a sleeve (31) and a connecting steel bar (32). One end of the sleeve (31) is disposed in the connection hole (12) and the other end is fixed to the concrete layer (24). One end of the connecting steel bar (32) is disposed in the sleeve (31) and the other end is fixed to the concrete layer (24). The sleeve (31) is provided with a slurry inlet hole (311) and a plurality of slurry outlet holes (312) communicating with the slurry inlet hole (311). The outer wall of the sleeve (31) is provided with a support hole (313). The reinforcement mechanism further includes a support assembly (4). The support assembly (4) includes a support rod (41) and a support spring (42). One end of the support rod (41) is disposed in the support hole (313) and the other end abuts against the inner wall of the connecting hole (12). The support spring (42) is fixed between the support rod (41) and the bottom of the support hole (313). A connecting hole (314) is provided between the slurry inlet hole (311) and the support hole (313); The reinforcement mechanism further includes a reinforcing component (5), which includes a vertical reinforcing bar (51) and a horizontal reinforcing bar (52). The vertical reinforcing bar (51) is fixed to the concrete layer (24) and is also fixed to the connecting reinforcing bar (32). The horizontal reinforcing bar (52) is fixed to the end of the vertical reinforcing bar (51). The reinforcing component (5) further includes: a reinforcing bar (53), which is fixed between the vertical bar (51) and the connecting bar (32), and between the connecting bar (32) and the sleeve (31); The connecting steel bar (32) is provided with a reaction component (6) to react to the settlement of the new road surface (2) or the old road surface (1); The reaction assembly (6) includes a steel pipe (61) and an oil level sensor (62). The steel pipe (61) is fixed between the reinforcing steel bar (53) connected to the vertical reinforcing bar (51) and the reinforcing steel bar (53) connected to the sleeve (31). The steel pipe (61) is used to fill oil. The oil level sensor (62) is fixed on the steel pipe (61).

2. The construction method for the splicing joint of new and old roadbed base courses according to claim 1, characterized in that, The inner wall of the sleeve (31) is provided with a grouting hole (315) communicating with the grout inlet hole (311), and a clamping assembly (7) for clamping the connecting steel bar (32) is provided inside the sleeve (31).

3. The construction method for the splicing joint of new and old roadbed base courses according to claim 2, characterized in that, The clamping assembly (7) includes a clamping arc plate (71) and a compression spring (72). One end of the compression spring (72) is fixed to the inner wall of the sleeve (31), and the other end is fixed to the clamping arc plate (71). The connecting steel bar (32) passes through the clamping arc plate (71).

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