Combined roadbed side ditch construction method

Abstract

The present application relates to the field of drainage ditch, disclose a kind of combined roadbed side ditch construction method, comprising the following steps: step one, two groups of prefabricated side plate are inserted into soil body;Step two, excavate soil body between two groups of prefabricated side plate;Step three, set bottom plate between two groups of prefabricated side plate;Step four, lay cover plate on the upper end of two groups of prefabricated side plate.Not do foundation pit support, without pouring side plate on site, while ensuring resistance to lateral earth pressure, to achieve smooth drainage, reliable quality, reduce investment, reduce land occupation and meet the requirements of industrialized construction.

Description

Technical Field

[0001] This invention relates to the field of drainage ditches, and more specifically to a combined roadbed side ditch construction method. Background Technology

[0002] Roadbed drainage side ditches are important auxiliary drainage structures in roadbed engineering. They are usually set on the outer edge of the road shoulder in road cuts, and their function is to collect and drain surface water within the road cut area to prevent rainwater accumulation from causing erosion and scouring damage to the roadbed structure, thus ensuring the overall stability of the roadbed. In long road cuts and special roadbed sections with reverse slope drainage side ditches, in order to meet the engineering requirements of natural gravity drainage of surface water, it is necessary to lower the bottom elevation of the side ditch so that the bottom height is lower than the side ditch platform, thereby forming a deep side ditch structure. Currently, traditional deep side ditches often have the following defects: 1. In order to save investment, the lateral width of the side ditch is narrow, and the construction space is already limited. In addition, the deep side ditch is very deep, which makes the construction difficult and the construction quality cannot be guaranteed.

[0003] 2. Before constructing the side ditch, the foundation pit of the side ditch needs to be excavated and supported. The support cost is high and the construction period is long.

[0004] 3. Traditional side ditch construction methods are mostly full cast-in-place construction, resulting in poor overall quality. At the same time, cast-in-place construction does not meet the requirements of current industrialized construction.

[0005] 4. Fully prefabricated side ditches have a lot of joints, and water is prone to seepage, especially at the joints.

[0006] To address these issues, we propose a combined roadbed side ditch construction method. Summary of the Invention

[0007] The present invention aims to provide a combined roadbed side ditch construction method that eliminates the need for foundation pit support and on-site pouring of side slabs. While ensuring resistance to lateral earth pressure, it achieves smooth drainage, reliable quality, reduced investment, reduced land occupation, and meets the requirements of industrialized construction.

[0008] To achieve the above objectives, the present invention adopts the following technical solution: a combined roadbed side ditch construction method, characterized by comprising the following steps: Step 1: Insert the two sets of precast side panels into the soil; Step 2: Excavate the soil between the two sets of precast side panels; Step 3: Install a base plate between the two sets of precast side panels; Step 4: Lay cover plates on the upper part of the two sets of prefabricated side panels.

[0009] The beneficial effects of this scheme are as follows: by fully inserting two sets of precast side panels into the soil and then excavating the soil between the two sets of precast side panels, the precast side panels form a natural enclosure in the soil to support the soil on both sides of the side ditch. The precast side panels serve as the inner wall of the roadbed side ditch and also as the support structure of the roadbed pit, avoiding the need for pit support work during conventional side ditch construction, saving investment and shortening the construction period.

[0010] Furthermore, the precast side panel has an installation section and an embedding section from top to bottom. The embedding section of the precast side panel is used to insert into the soil. In step two, the soil between the two sets of prefabricated side panel installation sections is excavated.

[0011] The beneficial effect is that the soil between the two sets of prefabricated side panels is excavated until the installation section of the prefabricated side panels is completely exposed. At this time, the natural enclosure formed by the embedded section of the prefabricated side panels in the soil supports the soil on both sides of the side ditch.

[0012] Furthermore, the installation section of the precast side panel is evenly provided with several positioning grooves, and the bottom plate is located between the installation sections of the two sets of precast side panels. The bottom plate includes a horizontal section and several vertical sections located on both sides of the horizontal section, and the vertical sections can be embedded into the positioning grooves of the precast panel.

[0013] Furthermore, the base slab includes a cast-in-place skeleton, which includes several horizontally laid reinforcing bars and several connecting reinforcing bars perpendicular to the horizontally laid reinforcing bars. The horizontally laid reinforcing bars are laid parallel to each other in the horizontal section, and the middle parts of the connecting reinforcing bars are laid parallel to each other in the horizontal section. The two ends of each connecting reinforcing bar are located in the corresponding vertical section.

[0014] The beneficial effects are: by casting the cast-in-place frame, the bottom plate and the two sets of precast side plates are integrated, and the vertical section of the bottom plate provides auxiliary support for the precast side plates, increasing the stability of the roadbed side ditch.

[0015] Furthermore, a limiting platform is provided in the installation section of the precast side panel, and the horizontal section of the bottom plate is located at the upper end of the limiting platform.

[0016] Furthermore, in step three, the two ends of each connecting steel bar are placed between the corresponding positioning grooves, and the lower end of the connecting steel bar is in contact with the limiting platform. Then, each flat steel bar is laid on the upper end of the connecting steel bar, and the flat steel bar is perpendicular to the connecting steel bar.

[0017] The beneficial effects are: the limiting platform can serve as a depth marker for the roadbed side ditch. When the workers excavate the soil to expose the limiting platform, it means that the depth of the roadbed side ditch has reached the set depth. At the same time, the limiting platform can also support the cast-in-place skeleton.

[0018] Furthermore, the precast side panel is provided with an installation section and an embedding section from top to bottom. The embedding section of the precast side panel is used to insert into the soil. The upper end of the installation section is provided with a support groove, and a precast cross brace is provided between the support grooves on both sides. In step two, the soil between the two sets of prefabricated side panel installation sections is excavated, and then the prefabricated cross braces are placed between the corresponding support slots.

[0019] The beneficial effects are: by setting up precast cross braces to provide horizontal support for the precast side panels on both sides, it can effectively resist the increased lateral earth pressure caused by the increased depth of the deep side trench, prevent the side trench from cracking or being damaged, and reduce material costs and floor space without excessively increasing the wall thickness.

[0020] Furthermore, the base plate includes several first precast base plates and second precast base plates. The first precast base plate has an upper joint at one end and a lower joint at the other end. The upper joint and the lower joint are shaped to match each other. The first precast base plate is used to splice in the middle of the base plate. The second precast base plate has an upper joint or a lower joint at only one end, which is used to splice in the end of the base plate. In step three, the base plate is laid on the soil above the two sets of precast side plates.

[0021] Furthermore, the installation section is equipped with a limit platform; In step two, the soil between the two sets of prefabricated side panel installation sections is excavated until the soil is exposed above the limiting platform. In step three, the base plate is laid on the top of the limiting platform.

[0022] Furthermore, in step three, the laid base plate is leveled with waterproof mortar. Attached Figure Description

[0023] Figure 1 This is a three-dimensional structural breakdown of the roadbed side ditch in Embodiment 1 of the present invention; Figure 2 This is a three-dimensional structural diagram of the first side plate, the second side plate, and the third side plate of Embodiment 1 of the present invention; Figure 3 This is a three-dimensional structural diagram of the cast-in-place skeleton in Embodiment 1 of the present invention; Figure 4 This is a three-dimensional view of two sets of prefabricated side panels after being inserted into the soil in Embodiment 1 of the present invention; Figure 5 This is a three-dimensional view of the soil after excavation in Embodiment 1 of the present invention; Figure 6 This is a three-dimensional view of the cast-in-place skeleton laid in Embodiment 1 of the present invention; Figure 7 This is a three-dimensional view of the cast-in-place base slab in Embodiment 1 of the present invention; Figure 8 This is a three-dimensional view of Embodiment 1 of the present invention after the cover plate has been installed; Figure 9 This is a three-dimensional view of the roadbed side ditch in Embodiment 1 of the present invention; Figure 10 This is a three-dimensional structural breakdown of the roadbed side ditch in Embodiment 2 of the present invention; Figure 11 This is a three-dimensional view of the first prefabricated base plate in Embodiment 2 of the present invention; Figure 12 This is a three-dimensional view of two sets of prefabricated side plates after being inserted into the soil in Embodiment 2 of the present invention; Figure 13 This is a three-dimensional view of the excavated soil in Embodiment 2 of the present invention; Figure 14 This is a three-dimensional view of Embodiment 2 of the present invention after the prefabricated cross bracing has been installed; Figure 15 This is a three-dimensional view of the base plate after it has been laid in Embodiment 2 of the present invention; Figure 16 This is a three-dimensional view of Embodiment 2 of the present invention after the cover plate has been installed. Detailed Implementation

[0024] The following detailed description illustrates the specific implementation method: The reference numerals in the accompanying drawings include: soil 1, installation section 2, embedding section 3, positioning groove 4, horizontal section 5, vertical section 6, first side plate 7, second side plate 8, third side plate 9, interlocking joint 10, interlocking groove 11, flat reinforcing bar 12, connecting reinforcing bar 13, limiting platform 14, steel plate 15, limiting strip 16, cover plate 17, precast side plate 18, installation groove 19, precast cross brace 20, first precast bottom plate 21, second precast bottom plate 22, upper joint 23, lower joint 24.

[0025] Example 1 A construction method for a combined roadbed side ditch is provided, which includes a combined roadbed side ditch comprising two sets of precast side plates 18 arranged in parallel and a cast-in-place base slab located between the two sets of precast side plates 18. The precast side plates 18 are integrally formed from top to bottom with an installation section 2 and an embedding section 3. The embedding section 3 of the precast side plates 18 is used to insert into the soil 1. Several positioning grooves 4 are vertically opened at the opposite ends of the installation sections 2 of the two sets of precast side plates 18. The cast-in-place base slab includes a horizontal section 5 and several vertical sections 6 located on both sides of the horizontal section 5, and the vertical sections 6 can be embedded into the positioning grooves 4 of the precast slab.

[0026] like Figure 2 The prefabricated side panel 18 shown includes a first side panel 7, a second side panel 8, and a third side panel 9. One end of the first side panel 7 has an integrally formed interlocking joint 10, and the other end of the first side panel 7 has an interlocking groove 11. The interlocking joint 10 and the interlocking groove 11 are shaped to fit together. The first side panel 7 is used to splice into the middle of the prefabricated side panel 18. In this embodiment, as shown... Figure 2The bite joint 10 and bite groove 11 shown are both rectangular, and as... Figure 1 As shown, the adjacent first side plates 7 are connected by a bite joint 10 and a bite groove 11 to form a "Z"-shaped bite joint 10.

[0027] like Figure 2 As shown, the second side plate 8 has an interlocking joint 10 integrally formed on only one end, and the third side plate 9 has an interlocking groove 11 on only one end. The connection positions of the interlocking joint 10 of the second side plate 8 and the interlocking groove 11 of the third side plate 9 are the same as those of the first side plate 7. The second side plate 8 and the third side plate 9 are respectively used to splice the two ends of the prefabricated side plate 18.

[0028] like Figure 3 The cast-in-place base slab shown includes a cast-in-place skeleton, which includes several flat reinforcing bars 12 and several connecting reinforcing bars 13 perpendicular to the flat reinforcing bars 12. In this embodiment, the connecting reinforcing bars 13 are set in the shape of "U". The several flat reinforcing bars 12 are laid parallel to each other in the horizontal section 5 and are arranged along the laying direction of the roadbed side ditch. The middle parts of the several connecting reinforcing bars 13 are laid parallel to each other in the horizontal section 5, and the two ends of each connecting reinforcing bar 13 are located in the corresponding vertical section 6.

[0029] like Figure 1 As shown, the installation section 2 of the precast side plate 18 has a limiting platform 14. The horizontal section 5 of the cast-in-place base plate is located at the upper end of the limiting platform 14. The cross section of the embedded section 3 of the precast side plate 18 is set as trapezoidal, and the width of the lower end of the embedded section 3 is smaller than the width of the upper end. A steel plate 15 is provided at the lower end of the embedded section 3. The steel plate 15 is embedded during the precasting process of the precast side plate 18. The steel plate 15 serves as the excavation head for the precast side plate 18 to be pressed into the soil 1.

[0030] like Figure 1 As shown, the upper end of the installation section 2 of the prefabricated side panel 18 is integrally formed with a limiting strip 16. The limiting strip 16 can restrict the movement of the cover plate 17. It also includes a cover plate 17, which is laid on the upper end of the two sets of prefabricated side panels 18 and is located between the limiting strips 16.

[0031] A combined roadbed side ditch construction method includes the following steps: Step 1, such as Figure 4 As shown, two sets of prefabricated side plates 18 are inserted into the soil 1 in parallel through the cooperation of steel plate 15 and embedded section 3. Specifically, the second side plate 8, the first side plate 7 and the third side plate 9 are inserted into the soil 1 in sequence, and the number of first side plates 7 inserted is set according to the length of the roadbed side ditch. The first side plate 7, the second side plate 8 and the third side plate 9 are connected to each other through interlocking joint 10 and interlocking groove 11. Step 2, as follows Figure 5 As shown, the soil 1 between the two sets of prefabricated side panels 18 is excavated until the limiting platform 14 is exposed; Step 3, as follows Figure 6 As shown, insert the connecting steel bars 13 into each positioning slot 4 until the lower end of the connecting steel bars 13 contacts the limiting platform 14, and then lay the flat steel bars 12 on top of the connecting steel bars 13, as shown. Figure 7 As shown, the cast-in-place skeleton forms the horizontal section 5 of the base plate, while the positioning groove 4 is filled with cement grout to form the vertical section 6 of the base plate. Step 4, as follows Figure 8 As shown, cover plates 17 are laid on the upper ends of the two sets of prefabricated side plates 18, and the cover plates 17 are located between the limiting strips 16 on both sides.

[0032] Final roadbed side ditch Figure 9 As shown.

[0033] In this embodiment, each side plate is made with a length of 500mm-1000mm and a thickness of 150mm-300mm. The main material is RPC high-strength cement-based. The length of the side plate can be selected according to the actual number of kilometers of deep side trenches laid. If the number of kilometers of deep side trenches is too large, a longer side plate can be used, and vice versa. The thickness of each side plate can be selected according to the actual soil conditions and the lateral pressure generated by the soil, so as to achieve the effect of no support required by using prefabricated side plates 18 alone.

[0034] The steel plate 15 is made of Q235 flat steel with a thickness of 10mm-20mm, and extends 100mm-200mm beyond the lower end of the precast side plate 18. During the pressing process, the steel plate 15 not only guides and cuts the hard soil layer, but also protects the upper RPC material side plate body from damage. The self-advancing steel plate 15 is centrally positioned, which can make the excavation head bear force evenly and avoid deviation during the pressing process. The limitation of the thickness and width range can ensure that the self-advancing steel plate 15 itself has sufficient rigidity and strength to meet the pressing construction and long-term stress requirements, while avoiding material waste and increased construction difficulty caused by excessive size. It is suitable for deep side trenches of different depths and soil pressures.

[0035] Example 2 The difference between Example 2 and Example 1 is as follows: Figure 10 As shown, the roadbed side ditch also includes several prefabricated cross braces 20. The cross section of the prefabricated cross braces 20 is rectangular. Several installation grooves 19 are opened at the opposite ends of the installation sections 2 of the two sets of prefabricated side plates 18, and the installation grooves 19 cooperate with the prefabricated cross braces 20. Specifically, the upper middle part of the first side plate 7, the second side plate 8, and the third side plate 9 are all provided with installation grooves 19. The two ends of the prefabricated cross braces 20 can be respectively engaged in the corresponding installation grooves 19. The bottom plate includes several first prefabricated bottom plates 21 and second prefabricated bottom plates 22, such as... Figure 11As shown, the first prefabricated base plate 21 has an upper connector 23 integrally formed at one end and a lower connector 24 integrally formed at the other end. The shapes of the upper connector 23 and the lower connector 24 are matched. The first prefabricated base plate 21 is used to splice in the middle of the base plate. In this embodiment, both the upper connector 23 and the lower connector 24 are set as rectangles, and when the upper connector 23 and the lower connector are connected, they form a "Z"-shaped interlocking connector 10. The second prefabricated base plate 22 has an upper connector 23 or a lower connector 24 integrally formed at only one end, which is used to splice at the end of the base plate.

[0036] A combined roadbed side ditch construction method includes the following steps: Step 1, such as Figure 12 As shown, two sets of prefabricated side panels 18 are inserted into the soil 1 to serve as the inner walls of the roadbed side ditch. Step 2, as follows Figure 13 As shown, the soil 1 between the two sets of precast side panels 18 is excavated until the limiting platform 14 is exposed, as follows. Figure 14 As shown, each prefabricated cross brace 20 is then placed in the corresponding mounting groove 19 of the prefabricated side panels 18 on both sides; Step 3, as follows Figure 15 As shown, a base plate is laid between the two sets of prefabricated side plates 18, with the two sides of the base plate overlapping the upper end of the limiting platform 14. At the same time, waterproof mortar is used to smooth and level the surface of the base plate. Step 4, as follows Figure 16 As shown, cover plates 17 are laid on the upper ends of the two sets of prefabricated side panels 18 and prefabricated cross braces 20.

[0037] The above descriptions are merely embodiments of the present invention, and common knowledge such as specific technical solutions and / or characteristics are not described in detail here. It should be noted that those skilled in the art can make various modifications and improvements without departing from the technical solutions of the present invention, and these should also be considered within the scope of protection of the present invention. These modifications and improvements will not affect the effectiveness of the implementation of the present invention or the practicality of the patent. The scope of protection claimed in this application should be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.

Claims

1. A method for constructing a combined roadbed side ditch, characterized in that, Includes the following steps: Step 1: Insert the two sets of precast side panels into the soil; Step 2: Excavate the soil between the two sets of precast side panels; Step 3: Install a base plate between the two sets of precast side panels; Step 4: Lay cover plates on the upper part of the two sets of prefabricated side panels.

2. The method for constructing a combined roadbed side ditch according to claim 1, characterized in that: The precast side panel has an installation section and an embedding section from top to bottom. The embedding section of the precast side panel is used to insert into the soil. In step two, the soil between the two sets of prefabricated side panel installation sections is excavated.

3. The method for constructing a combined roadbed side ditch according to claim 2, characterized in that: The installation section of the precast side panel is evenly provided with several positioning grooves. The bottom plate is located between the installation sections of the two sets of precast side panels. The bottom plate includes a horizontal section and several vertical sections located on both sides of the horizontal section. The vertical sections can be embedded into the positioning grooves of the precast panel.

4. The method for constructing a combined roadbed side ditch according to claim 3, characterized in that: The base slab includes a cast-in-place skeleton, which includes several horizontally laid steel bars and several connecting steel bars perpendicular to the horizontally laid steel bars. The horizontally laid steel bars are laid parallel to each other in the horizontal section, and the middle parts of the connecting steel bars are laid parallel to each other in the horizontal section. The two ends of each connecting steel bar are located in the corresponding vertical section.

5. The method for constructing a combined roadbed side ditch according to claim 4, characterized in that: The installation section of the precast side panel has a limiting platform, and the horizontal section of the bottom plate is located at the upper end of the limiting platform.

6. The method for constructing a combined roadbed side ditch according to claim 5, characterized in that: In step three, the two ends of each connecting steel bar are placed between the corresponding positioning slots, and the lower end of the connecting steel bar is in contact with the limiting platform. Then, each flat steel bar is laid on the upper end of the connecting steel bar, and the flat steel bar is perpendicular to the connecting steel bar.

7. The method for constructing a combined roadbed side ditch according to claim 1, characterized in that: The precast side panel has an installation section and an embedding section from top to bottom. The embedding section of the precast side panel is used to insert into the soil. The upper end of the installation section has a support groove, and a precast cross brace is provided between the support grooves on both sides. In step two, the soil between the two sets of prefabricated side panel installation sections is excavated, and then the prefabricated cross braces are placed between the corresponding support slots.

8. The method for constructing a combined roadbed side ditch according to claim 7, characterized in that: The base plate includes several first precast base plates and second precast base plates. The first precast base plate has an upper joint at one end and a lower joint at the other end. The upper joint and the lower joint are shaped to match each other. The first precast base plate is used to splice in the middle of the base plate. The second precast base plate has an upper joint or a lower joint at only one end, which is used to splice at the end of the base plate. In step three, the base plate is laid on the soil above the two sets of precast side plates.

9. A method for constructing a combined roadbed side ditch according to claim 8, characterized in that: The installation section is equipped with a limit platform; In step two, the soil between the two sets of prefabricated side panel installation sections is excavated until the soil is exposed above the limiting platform. In step three, the base plate is laid on the top of the limiting platform.

10. A method for constructing a combined roadbed side ditch according to claim 9, characterized in that: In step three, waterproof mortar is used to smooth and level the surface of the laid base plate.

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