Method for connecting the prefabricated roadbed of a road crossing a flood control dam

Abstract

The present application relates to the technical field of roadbed construction, and discloses a connecting construction method of a highway assembled roadbed crossing a fill flood control dam. The assembled roadbed can be flexibly prefabricated according to the roadbed at the connecting part of the flood control dam of different shapes, and meanwhile, the connecting part is a relatively weak part, so prefabrication is carried out by using concrete or reinforced concrete, which can ensure the construction quality of the roadbed at the connecting part. Secondly, a reserved hole is arranged on the steel pipe pile, the fill flood control dam and the assembled roadbed on both sides, and the steel pipe pile, the fill flood control dam and the assembled roadbed on both sides are connected into a whole by using a prestressed anchor cable and an anchor device, so that the tightness of the connection between the roadbed and the flood control dam is improved, and the situation of road surface cracking caused by loose connection can be avoided. Finally, the prestressed anchor cable, after being tensioned, improves the tightness of the connection between the roadbed and the flood control dam, and together with the steel pipe pile, forms a steel framework in the fill flood control dam to improve the structural strength of the flood control dam.

Description

Technical Field

[0001] This invention relates to the field of roadbed construction technology, specifically to a connection construction method for prefabricated roadbeds crossing earth-filled flood control dams. Background Technology

[0002] Currently, when constructing secondary highways in China, the traditional construction method for highways that need to cross earth-filled flood control dams involves filling and building the roadbed on both sides of the section crossing the dam, compacting it, and then paving the road surface. However, due to construction process issues, the connection between the roadbed and the dam may not be tight. During later highway operation, under the continuous pressure of vehicles, misalignment may occur between the roadbed and the dam, leading to road surface cracking. In addition, the traditional roadbed connection construction method is also characterized by high manpower and material resources consumption and low efficiency. Summary of the Invention

[0003] To address the aforementioned shortcomings of existing technologies, a method for connecting prefabricated roadbeds for highways crossing earth-filled flood control dams is provided. This method improves the tightness of the connection between the roadbed and the flood control dam, and can prevent road surface cracking caused by loose connections.

[0004] The technical solution adopted by the present invention to solve the above-mentioned technical problems is as follows:

[0005] A construction method for connecting prefabricated roadbeds for highways crossing earth-filled flood control dams is characterized by: driving steel pipe piles into the inner side of the earth-filled flood control dam and setting up prefabricated roadbeds on both sides of the earth-filled flood control dam; setting up several reserved holes that simultaneously pass through the steel pipe piles, the earth-filled flood control dam, and the prefabricated roadbeds on both sides, and passing prestressed anchor cables through each reserved hole, setting anchors at both ends of the prestressed anchor cables, and connecting the steel pipe piles, the earth-filled flood control dam, and the prefabricated roadbeds on both sides into a whole through the anchors.

[0006] According to the above technical solution, the roadbed includes an earth-filled flood control dam, steel pipe piles driven into the inner side of the earth-filled flood control dam, and prefabricated roadbeds located on both sides of the earth-filled flood control dam. Each reserved hole is divided into five sections, namely, the first section located on one side of the prefabricated roadbed, the second section located on one side of the earth-filled flood control dam, the third section located on the steel pipe piles, the fourth section located on the other side of the earth-filled flood control dam, and the fifth section located on the other side of the prefabricated roadbed. A single prestressed anchor cable passes through the five sections of the reserved hole in sequence and is fixed by an anchor. A sliding rail support is provided on the earth-filled flood control dam, extending to the installation area of ​​the prefabricated roadbed, and the extension section of the sliding rail support is located on the bottom surface of the prefabricated roadbed. A sliding groove matching the sliding rail support is provided on the bottom surface of the prefabricated roadbed. An external jacking mechanism abuts against the side of the prefabricated roadbed away from the earth-filled flood control dam.

[0007] According to the above technical solution, this method includes the following steps:

[0008] S1: The workers planned in advance the locations of the second and fourth sections of the reserved holes on the earth-filled flood control dam;

[0009] S2: Based on the positions of all reserved holes in the second and fourth sections, and in conjunction with the insertion depth of the steel pipe piles, set up matching reserved holes in the third section on the steel pipe piles, and set up matching reserved holes in the first and fifth sections on the prefabricated roadbed.

[0010] S3: Drive in steel pipe piles, and align the third section of the reserved hole of the steel pipe pile with the second and fourth sections of the reserved hole of the earth-filled flood control dam;

[0011] S4: Install sliding rail supports on both sides of the earth-filled flood control dam and install the prefabricated roadbed on the sliding rail supports;

[0012] S5: Pass the prestressed anchor cables through the first to fifth sections of the reserved holes in sequence for temporary fixation;

[0013] S6: The prefabricated roadbed is attached to the earth-filled flood control dam by the jacking mechanism, and the anchor cables are tensioned by the tensioning device and then fixed by the anchors.

[0014] S7: After the concrete is poured on the earth-filled flood control dam and the prefabricated roadbed, the road surface can be paved and the remaining road construction can be carried out.

[0015] According to the above technical solution, in step S6, after the anchor locks the anchor cable, the jacking mechanism is disassembled, but the slide rail bracket is retained; concrete is poured at the slide rail bracket.

[0016] According to the above technical solution, in step S2, the prefabricated roadbed is prefabricated using reinforced concrete or plain concrete according to the engineering requirements, and the shape of the contact surface between the prefabricated roadbed and the earth-filled flood control dam is matched.

[0017] According to the above technical solution, in step S4, the depth of the slide rail bracket inserted into the earth-filled flood control dam is adjusted according to the size of the prefabricated roadbed.

[0018] According to the above technical solution, the number and diameter of steel pipe piles are adjusted according to the width of the highway in the actual project.

[0019] According to the above technical solution, all the reserved holes are arranged horizontally.

[0020] The present invention has the following beneficial effects:

[0021] 1. The prefabricated roadbed allows for flexible prefabrication of the roadbed at the joints according to the different shapes of flood control dams. Since the joints are relatively vulnerable areas, prefabrication with concrete or reinforced concrete ensures the construction quality of the roadbed at these joints. Secondly, pre-reserved holes are set in the steel pipe piles, the earth-filled flood control dam, and the prefabricated roadbeds on both sides. Prestressed anchor cables and anchors are used to connect the steel pipe piles, the earth-filled flood control dam, and the prefabricated roadbeds on both sides into a whole, improving the tightness of the connection between the roadbed and the flood control dam and preventing road surface cracking due to loose connections. Finally, after tensioning, the prestressed anchor cables not only improve the tightness of the roadbed connection but also form a steel skeleton inside the earth-filled flood control dam together with the steel pipe piles, increasing the structural strength of the flood control dam.

[0022] 2. Prefabrication, drilling, and anchor cable tensioning are all common processes that do not require complex training for operators, thus improving work efficiency. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the earth-filled flood control dam, steel pipe piles, and prefabricated roadbed reserved holes provided in the embodiments of the present invention;

[0024] Figure 2 This is a schematic diagram showing the location of the steel pipe piles driven into the flood control dam according to an embodiment of the present invention;

[0025] Figure 3 This is a schematic diagram of an earth-filled flood control dam and a steel pipe pile with interlaced prestressed anchor cables, provided by an embodiment of the present invention;

[0026] Figure 4 This is a schematic diagram of the location of the slide rail bracket and the prefabricated roadbed provided in the embodiments of the present invention;

[0027] Figure 5 This is a schematic diagram of the prefabricated roadbed jacking method provided by the present invention;

[0028] Figure 6 This is a schematic diagram of tensioning and anchoring according to an embodiment of the present invention;

[0029] In the diagram, 1 is an earth-filled flood control dam, 2 is a prefabricated roadbed, 3 is a steel pipe pile, 4 is a reserved hole, 5 is a prestressed anchor cable, 6 is a sliding rail support, 7 is a jacking machine, 8 is a connecting joint, and 9 is an anchor. Detailed Implementation

[0030] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0031] Reference Figures 1-6 As shown, the present invention provides a method for connecting prefabricated roadbeds for highways crossing earth-filled flood control dams.

[0032] Example 1

[0033] Steel pipe piles 3 are driven into the inner side of the earth-filled flood control dam 1, and prefabricated roadbeds 2 are set on both sides of the earth-filled flood control dam. Several reserved holes 4 are set to pass through the steel pipe piles, the earth-filled flood control dam, and the prefabricated roadbeds on both sides. Prestressed anchor cables 5 are passed through each reserved hole. Anchors 9 are set at both ends of the prestressed anchor cables. The steel pipe piles, the earth-filled flood control dam, and the prefabricated roadbeds on both sides are connected into a whole by the anchors.

[0034] In this embodiment, the prefabricated roadbed allows for flexible prefabrication of the roadbed at the connection points according to the different shapes of flood control dams. Since the connection points are relatively vulnerable, prefabrication with concrete or reinforced concrete ensures the construction quality of the roadbed at these points. Secondly, pre-reserved holes are set in the steel pipe piles, the earth-filled flood control dam, and the prefabricated roadbeds on both sides. Prestressed anchor cables and anchors are used to connect the steel pipe piles, the earth-filled flood control dam, and the prefabricated roadbeds on both sides into a unified whole, improving the tightness of the connection between the roadbed and the flood control dam and preventing road surface cracking due to loose connections. Finally, after tensioning, the prestressed anchor cables not only improve the tightness of the roadbed connection but also form a steel skeleton inside the earth-filled flood control dam together with the steel pipe piles, increasing the structural strength of the flood control dam.

[0035] Example 2

[0036] The method and principle of Example 2 are similar to those of Example 1, except that: in this example, a preferred roadbed structure and an implementation of anchor fastening prestressed anchor cables are given.

[0037] Specifically, the roadbed includes an earth-filled flood control dam, steel pipe piles driven into the inner side of the earth-filled flood control dam, and prefabricated roadbeds located on both sides of the earth-filled flood control dam. Each reserved hole is divided into five sections, namely, the first section located on one side of the prefabricated roadbed, the second section located on one side of the earth-filled flood control dam, the third section located on the steel pipe piles, the fourth section located on the other side of the earth-filled flood control dam, and the fifth section located on the other side of the prefabricated roadbed. A single prestressed anchor cable passes through the five sections of the reserved hole in sequence and is fixed by an anchor. A sliding rail support is provided on the earth-filled flood control dam, extending to the installation area of ​​the prefabricated roadbed, and the extension section of the sliding rail support is located on the bottom surface of the prefabricated roadbed. A sliding groove matching the sliding rail support is provided on the bottom surface of the prefabricated roadbed. An external jacking mechanism abuts against the side of the prefabricated roadbed away from the earth-filled flood control dam.

[0038] Example 3

[0039] The method and principle of Example 3 are similar to those of Example 2, except that, based on the above-mentioned subgrade structure and the implementation of anchor fastening prestressed anchor cables, this method includes the following steps:

[0040] S1: The workers planned in advance the locations of the second and fourth sections of the reserved holes on the earth-filled flood control dam;

[0041] S2: Based on the positions of all reserved holes in the second and fourth sections, and in conjunction with the insertion depth of the steel pipe piles, set up matching reserved holes in the third section on the steel pipe piles, and set up matching reserved holes in the first and fifth sections on the prefabricated roadbed.

[0042] S3: Drive in steel pipe piles, and align the third section of the reserved hole of the steel pipe pile with the second and fourth sections of the reserved hole of the earth-filled flood control dam;

[0043] S4: Install sliding rail supports 6 on both sides of the earth-filled flood control dam and install the prefabricated roadbed on the sliding rail supports;

[0044] S5: Pass the prestressed anchor cables through the first to fifth sections of the reserved holes in sequence for temporary fixation; the temporary fixation of the prestressed anchor cables is to prevent the prestressed anchor cables from sliding and misaligning during the jacking of the prefabricated roadbed;

[0045] S6: The prefabricated roadbed is attached to the earth-filled flood control dam by the jacking mechanism 7, and the anchor cable is tensioned by the tensioning device and then fixed by the anchor.

[0046] S7: After the concrete is poured on the earth-filled flood control dam and the prefabricated roadbed, the road surface can be paved and the remaining road construction can be carried out.

[0047] In this embodiment, the traditional roadbed connection construction method addresses problems such as loose joints (i.e., the gap between the earth-filled flood control dam and the roadbed) due to construction processes, high manpower and material consumption, and low efficiency. During construction, pre-drilled holes are made in the steel pipe piles, the earth-filled flood control dam, and the prefabricated roadbed. The steel pipe piles are driven vertically into the flood control dam. A sliding rail support is inserted into the flood control dam, and the prefabricated roadbed is placed within the sliding rail support. Prestressed anchor cables pass through the pre-drilled holes in the steel pipe piles, the earth-filled flood control dam, and the prefabricated roadbed. Subsequently, a jacking mechanism is used to jack the prefabricated roadbed from both sides of the earth-filled flood control dam. Once the prefabricated roadbed contacts the earth-filled flood control dam, prestressed anchor cables are simultaneously tensioned from both ends of the earth-filled flood control dam. Anchors are used to fix the prestressed anchor cables. At this point, the prestressed anchor cables connect the flood control dam to the roadbed on both sides. The prestressed anchor cables and the steel pipe piles form a crisscrossing framework inside the flood control dam to reinforce it.

[0048] Based on Embodiment 3, preferably, in step S6, after the anchor locks the anchor cable, the jacking mechanism is disassembled, but the slide rail bracket is retained; concrete is poured at the slide rail bracket.

[0049] Since the sliding rail support spans both the earth-filled flood control dam and the prefabricated roadbed, and then concrete is poured on it, the sliding rail support can act as a skeleton to reinforce, connect, and resist bending at the junction of the flood control dam and the prefabricated roadbed.

[0050] Based on Example 3, preferably, in step S2, the prefabricated roadbed is prefabricated using reinforced concrete or plain concrete according to engineering requirements, and the shape of the contact surface between the prefabricated roadbed and the earth-filled flood control dam matches.

[0051] Based on embodiment 3, preferably, in step S4, the depth of the slide rail bracket inserted into the earth-filled flood control dam is adjusted according to the size of the prefabricated roadbed.

[0052] Based on embodiments 2 and 3, preferably, the role of steel pipe piles in this method is to serve as supports for the prestressed anchor cables, ensuring that the prestressed anchor cables are not misaligned during tensioning at the planned locations. The number and diameter of the steel pipe piles are adjusted according to the width of the highway in the actual project.

[0053] Based on embodiments 2 and 3, preferably, all the reserved holes are arranged horizontally.

[0054] The above are merely preferred embodiments of the present invention and should not be construed as limiting the scope of the present invention. Therefore, any equivalent changes made in accordance with the claims of the present invention shall still fall within the protection scope of the present invention.

Claims

1. A method for connecting prefabricated roadbeds of highways crossing earth-filled flood control dams, characterized in that: Steel pipe piles are driven into the inner side of the earth-filled flood control dam, and prefabricated roadbeds are set on both sides of the earth-filled flood control dam. Several reserved holes are set to pass through the steel pipe piles, the earth-filled flood control dam, and the prefabricated roadbeds on both sides. Prestressed anchor cables are passed through each reserved hole, and anchors are set at both ends of the prestressed anchor cables. The steel pipe piles, the earth-filled flood control dam, and the prefabricated roadbeds on both sides are connected into a whole through the anchors. The roadbed includes an earth-filled flood control dam, steel pipe piles driven into the inner side of the earth-filled flood control dam, and prefabricated roadbeds located on both sides of the earth-filled flood control dam. Each reserved hole is divided into five sections, namely, the first section located on one side of the prefabricated roadbed, the second section located on one side of the earth-filled flood control dam, the third section located on the steel pipe piles, the fourth section located on the other side of the earth-filled flood control dam, and the fifth section located on the other side of the prefabricated roadbed. A single prestressed anchor cable passes through the five sections of the reserved hole in sequence and is fixed by an anchor. A sliding rail support is provided on the earth-filled flood control dam, extending to the installation area of ​​the prefabricated roadbed, and the extension of the sliding rail support is located on the bottom surface of the prefabricated roadbed. A sliding groove matching the sliding rail support is provided on the bottom surface of the prefabricated roadbed. An external jacking mechanism abuts against the side of the prefabricated roadbed away from the earth-filled flood control dam. This method includes the following steps: S1: The workers planned in advance the locations of the second and fourth sections of the reserved holes on the earth-filled flood control dam; S2: Based on the positions of all reserved holes in the second and fourth sections, and in conjunction with the insertion depth of the steel pipe piles, set up matching reserved holes in the third section on the steel pipe piles, and set up matching reserved holes in the first and fifth sections on the prefabricated roadbed. S3: Drive in steel pipe piles, and align the third section of the reserved hole of the steel pipe pile with the second and fourth sections of the reserved hole of the earth-filled flood control dam; S4: Install sliding rail supports on both sides of the earth-filled flood control dam and install the prefabricated roadbed on the sliding rail supports; S5: Pass the prestressed anchor cables through the first to fifth sections of the reserved holes in sequence for temporary fixation; S6: The prefabricated roadbed is attached to the earth-filled flood control dam by the jacking mechanism, and the anchor cables are tensioned by the tensioning device and then fixed by the anchors. S7: After the concrete is poured on the earth-filled flood control dam and the prefabricated roadbed, the road surface can be paved and the remaining road construction can be carried out.

2. The connection construction method for prefabricated roadbeds crossing earth-filled flood control dams according to claim 1, characterized in that: In step S6, after the anchor locks the anchor cable, the jacking mechanism is disassembled, but the slide rail bracket is retained; concrete is poured at the slide rail bracket.

3. The connection construction method for prefabricated roadbeds crossing earth-filled flood control dams according to claim 1, characterized in that: In step S2, the prefabricated roadbed is prefabricated using reinforced concrete or plain concrete according to engineering requirements, and the shape of the contact surface between the prefabricated roadbed and the earth-filled flood control dam is matched.

4. The connection construction method for prefabricated roadbeds crossing earth-filled flood control dams according to claim 1, characterized in that: In step S4, the depth of the slide rail bracket inserted into the earth-filled flood control dam is adjusted according to the dimensions of the prefabricated roadbed.

5. The connection construction method for prefabricated roadbeds crossing earth-filled flood control dams according to claim 1, characterized in that: The number and diameter of steel pipe piles are adjusted according to the width of the highway in the actual project.

6. The connection construction method for prefabricated roadbeds crossing earth-filled flood control dams according to claim 1, characterized in that: All the reserved holes are arranged horizontally.

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