Roadbed structure passing through lake in scenic area

Abstract

The roadbed structure penetrating through the lake in the scenic area comprises a broken stone hardcore, a mattress layer, a foam light soil layer and a roadbed which are arranged above a soft layer, cantilever retaining walls are arranged on the two sides of the mattress layer and the two sides of the foam light soil layer, and each cantilever retaining wall is composed of a toe board, a heel board and a vertical wall; the structure is characterized in that anchor rod static pressure piles inserted into the broken stone hardcore, the soft layer and the position below the soft layer are evenly arranged below the cantilever retaining wall, and the upper ends of the anchor rod static pressure piles are fixed to the heel slab or the toe slab; tubular piles are arranged below the mattress layer, and a supporting plate for supporting the mattress layer is fixed to the upper ends of the tubular piles. According to the roadbed structure penetrating through the lake in the scenic area, the anchor rod static pressure piles and the pipe piles extend into the lower portion to support the cantilever retaining wall and the mattress layer, so that a stable roadbed structure is formed above the soft layer of the lake in the scenic area, and the technical problem that an existing soft layer foundation of a riprap treatment lake cannot meet the strength requirement is solved.

Description

Technical Field

[0001] The utility model relates to a roadbed structure for crossing a scenic area lake, and more specifically, particularly relates to a roadbed structure for crossing a scenic area lake. Background Art

[0002] With the rapid development of my country's economy, the road network is becoming more and more dense, and the number of highways crossing scenic lakes is increasing accordingly. In the construction process of existing highways crossing scenic lakes, riprap is usually used to treat the foundation, but the effect of riprap treatment on the foundation with thick soft layers of lakes is not obvious; if pipe piles are used to treat the foundation, the construction of steel pipe piles requires large equipment, and the cost of treating the foundation that can bear large equipment is high. Therefore, it is urgent to develop an economical, practical, and environmentally friendly roadbed structure that can meet the requirements of crossing the soft layer of lakes. Summary of the invention

[0003] In order to overcome the disadvantages of the above technical problems, the utility model provides a roadbed structure for crossing a lake in a scenic area.

[0004] The utility model of a roadbed structure crossing a scenic lake comprises a crushed stone cushion layer, a cushion layer, a foam light soil layer and a roadbed which are arranged above the soft layer of the lake from bottom to top, cantilever retaining walls are arranged on both sides of the cushion layer and the foam light soil layer, the cantilever retaining wall is composed of a toe plate, a heel plate and a vertical wall, the vertical wall is fixed to the toe plate and the heel plate, the toe plate and the heel plate are cast on the crushed stone cushion layer, and the heel plate is located between the crushed stone cushion layer and the cushion layer; the utility model is characterized in that: anchor static pressure piles inserted into the crushed stone cushion layer, the soft layer and the part below the soft layer are evenly arranged below the cantilever retaining wall, the upper ends of the anchor static pressure piles are fixed to the heel plate or the toe plate; pipe piles inserted into the crushed stone cushion layer, the soft layer and the part below the soft layer are arranged below the cushion layer, and a support plate for supporting the cushion layer is fixed to the upper ends of the pipe piles.

[0005] The utility model provides a roadbed structure for crossing a scenic lake, wherein the anchor static pressure piles are reinforced concrete square piles, the cross-section of the reinforced concrete square piles is 20cm*20cm~30cm*30cm, and the grade of concrete constituting the anchor static pressure piles is 30MPa~35MPa.

[0006] In the utility model of the roadbed structure for crossing a scenic area lake, the pipe piles are PHC piles with a diameter of 30 cm to 40 cm.

[0007] The utility model provides a roadbed structure for crossing a scenic lake, wherein the cantilever retaining wall, the cushion layer, the foam lightweight soil layer and the roadbed are provided with a transverse settlement joint every 30m to 40m, and the settlement joint is filled with waterproof asphalt hemp.

[0008] The utility model provides a roadbed structure for crossing a scenic lake, wherein the cushion layer is composed of upper and lower double-layer geocells, the geocells are filled with graded crushed stones, and the width of the cushion layer is equal to the distance between the inner sides of the two vertical walls.

[0009] The utility model provides a roadbed structure for crossing a scenic lake, wherein a lower anti-seepage geomembrane and an upper anti-seepage geomembrane are laid on the lower surface and the upper surface of the foam lightweight soil layer respectively, and the compressive strength of the foam lightweight soil layer is not less than 0.7 MPa.

[0010] In the utility model of the roadbed structure for crossing a scenic lake, the thickness of the crushed stone cushion layer is 40 cm to 60 cm.

[0011] The utility model provides a roadbed structure for crossing a scenic lake, wherein the roadbed is composed of improved soil.

[0012] The beneficial effects of the utility model are as follows: the roadbed structure of the utility model crossing the scenic area lake comprises a crushed stone cushion layer, a cushion layer, a foam lightweight soil layer and a roadbed which are arranged from bottom to top on the soft layer of the lake, and cantilever retaining walls consisting of a toe plate, a heel plate and a vertical wall are arranged on both sides, and anchor static pressure piles and pipe piles which support the crushed stone cushion layer, the soft layer and the part below the soft layer and are inserted into the crushed stone cushion layer, the soft layer and the part below the soft layer are arranged below the toe plate, the heel plate and the cushion layer. In this way, by utilizing the supporting effect of the anchor static pressure piles and the pipe piles on the cantilever retaining wall and the cushion layer after they are extended below, a stable roadbed structure is formed above the soft layer of the scenic area lake, thereby solving the technical problem that the existing stone-throwing treatment of the soft layer foundation of the lake cannot meet the strength requirements.

[0013] During the construction process, the toe plate and heel plate are first poured on the laid gravel cushion layer, and then the anchor static piles are pressed in. With the support of the anchor static piles on the toe plate and heel plate, the large equipment for driving pipe piles is placed on the toe plate and heel plate to drive the pipe piles in. This eliminates the need for building a foundation that can support large equipment and saves the cost of constructing the roadbed structure through the soft layer of the lake. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a front view of the roadbed structure of the utility model that crosses a scenic lake;

[0015] Figure 2 The utility model is a top view of the roadbed structure for crossing a scenic lake.

[0016] In the figure: 1 roadbed, 2 foam lightweight soil layer, 3 cushion layer, 4 crushed stone cushion layer, 5 cantilever retaining wall, 6 toe plate, 7 heel plate, 8 vertical wall, 9 anchor static piles, 10 pipe piles, 11 support plate, 12 upper anti-seepage geomembrane, 13 lower anti-seepage geomembrane, 14 weak layer, 15 settlement joint. DETAILED DESCRIPTION

[0017] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0018] like Figure 1 and Figure 2 As shown, the front view and the top view of the roadbed structure of the utility model crossing the scenic lake are respectively given. The roadbed structure crossing the scenic lake is composed of a crushed stone cushion layer 4, a cushion layer 3, a foamed light soil layer 2, a roadbed 1, a cantilever retaining wall 5, anchor static pressure piles 9 and pipe piles 10. The crushed stone cushion layer 4 is laid on the weak layer 14 of the scenic lake, the cushion layer 3 is laid on the crushed stone cushion layer 4, the foamed light soil layer 2 is arranged on the cushion layer 3, and the roadbed 1 is laid on the foamed light soil layer 1. Cantilever retaining walls 5 are arranged on both sides of the roadbed. The cantilever retaining walls 5 are composed of a toe plate 6, a heel plate 7 and a vertical wall 8. The toe plate 6, the heel plate 7 and the vertical wall 8 are all reinforced concrete structures.

[0019] The toe plate 6 and the heel plate 7 are cast on the gravel cushion layer 4, the heel plate 7 is located between the gravel cushion layer 5 and the cushion layer 3, and the vertical wall 8 is vertically arranged, and the lower end of the vertical wall 8 is fixedly connected to the toe plate 6 and the heel plate 7. After the vertical wall 8 is built, the cushion layer 3 and the foam light soil layer 2 are located between the two vertical walls 8, so that the width of the cushion layer 3 and the foam light soil layer 2 is equal to the distance between the inner sides of the two vertical walls 8.

[0020] The anchor static pressure piles 9 in an upright state are evenly arranged below the toe plate 6 and the heel plate 7 shown in the figure. The anchor static pressure piles 9 pass through the gravel cushion layer 4 and the weak layer 14 of the lake and extend into the part below the weak layer 14. The upper ends of the anchor static pressure piles 9 are fixedly connected to the toe plate 6 and the heel plate 7. Among the three rows of anchor static pressure piles 9 shown in the figure, one row is fixedly connected to the toe plate 6, and the other two rows are fixedly connected to the heel plate. In this way, the friction force generated by the outer surface of the anchor static pressure piles 9 and the surrounding contact parts is utilized to ensure that the anchor static pressure piles 9 have a large bearing capacity, thereby making the cantilever retaining wall 5 have a large bearing capacity. While ensuring that a stable roadbed structure crossing the scenic lake can be formed, the toe plate 6 and the heel plate 7 can carry large equipment for driving the pipe piles 10.

[0021] As shown, vertical pipe piles 10 are evenly arranged below the cushion layer 3, and the pipe piles 10 pass through the gravel cushion layer 4 and the weak layer 14 of the scenic lake, and extend into the part below the weak layer 14. A support plate 11 is fixed to the upper end of the pipe pile 10, and the support plate 11 realizes the bearing of the cushion layer 3. In this way, the contact friction between the outer wall of the pipe pile 10 and the surrounding is used to realize its strong bearing capacity.

[0022] It can be seen that the utility model of the roadbed structure crossing the scenic lake utilizes the anchor static pressure piles 9 to bear the load of the cantilever retaining wall 5, and the pipe piles 10 and the gravel cushion layer 4 to bear the load of the cushion layer 3, so that the formed roadbed structure has good stability and can be used as a roadbed structure passing through the scenic lake; it solves the problem that the existing riprap treatment of the soft layer foundation of the lake does not meet the strength requirements.

[0023] Since the settlement of the weak layer 14 in different sections of the scenic lake may be different, in order to adapt to the different settlements of the weak layer 14 in different sections, a transverse settlement joint 15 is arranged every 30m~40m in the roadbed, and the settlement joint is filled with asphalt hemp to avoid water seepage.

[0024] The anchor static pressure pile 9 shown can be a reinforced concrete square pile, the cross section of the reinforced concrete square pile is 20cm*20cm~30cm*30cm, and the concrete grade of the anchor static pressure pile 9 is 30MPa~35MPa. The pipe pile 10 can be a PHC pile with a diameter of 30cm~40cm.

[0025] The thickness of the gravel cushion layer 4 is 40 cm to 60 cm, and the cushion layer 3 adopts a double-layer geocell, which is filled with graded gravel. The lower surface and upper surface of the foamed light soil layer 2 are respectively paved with a lower anti-seepage geomembrane 13 and an upper anti-seepage geomembrane 12, and the compressive strength of the foamed light soil layer 2 is not less than 0.7 MPa; the roadbed 1 is composed of improved soil.

[0026] The construction sequence of the roadbed structure crossing the scenic lake of the utility model is as follows: first, a crushed stone cushion layer 4 is laid on the weak layer 14 of the scenic lake, and then a toe plate 6 and a heel plate 7 are cast on the crushed stone cushion layer 4, and holes for pressing the anchor static pressure piles 9 are reserved on the toe plate 6 and the heel plate 7. After the toe plate 6 and the heel plate 7 are maintained, the anchor static pressure piles 9 are pressed into the holes by hydraulic equipment and reaction frames, and the upper ends of the anchor static pressure piles 9 are sealed and connected. Then, the large equipment for driving the pipe piles 10 is transferred to the toe plate 6 and the heel plate 7 to drive the pipe piles 10; after the pipe piles are driven into place, the support plate 11 is set; then the vertical wall 8, the cushion layer 3, the foam lightweight soil layer 2 and the roadbed 1 are constructed in sequence.

[0027] It can be seen that the use of the toe plate 6 and the heel plate 7 constituting the cantilever retaining wall 5 to support the large equipment into which the pipe piles 10 are driven eliminates the need for the construction of a foundation capable of supporting the large equipment, saves the cost in the construction process of the roadbed structure crossing the soft layer of the lake, and is environmentally friendly.

Claims

1. A roadbed structure for crossing a scenic lake, comprising a crushed stone cushion layer (4), a cushion layer (3), a foam lightweight soil layer (2) and a roadbed (1) arranged from bottom to top above a soft layer (14) of a lake, cantilever retaining walls (5) being arranged on both sides of the cushion layer and the foam lightweight soil layer, the cantilever retaining wall being composed of a toe plate (6), a heel plate (7) and a vertical wall (8), the vertical wall being fixed to the toe plate and the heel plate, the toe plate and the heel plate being cast on the crushed stone cushion layer, and the heel plate being located between the crushed stone cushion layer and the cushion layer; characterized in that: Anchor static pressure piles (9) inserted into the gravel cushion layer, the weak layer and the portion below the weak layer are evenly arranged below the cantilever retaining wall, and the upper ends of the anchor static pressure piles are fixed to the heel plate or the toe plate; pipe piles (10) inserted into the gravel cushion layer, the weak layer and the portion below the weak layer are arranged below the cushion layer, and the upper ends of the pipe piles are fixed to a support plate (11) for supporting the cushion layer.

2. The roadbed structure for crossing a scenic lake according to claim 1 is characterized by: The anchor static pressure pile (9) is a reinforced concrete square pile, the cross section of the reinforced concrete square pile is 20cm*20cm~30cm*30cm, and the concrete grade of the anchor static pressure pile is 30MPa~35MPa.

3. The roadbed structure crossing a scenic lake according to claim 1 or 2, characterized in that: The pipe pile (10) is a PHC pile with a diameter of 30 cm to 40 cm.

4. The roadbed structure crossing a scenic lake according to claim 1 or 2, characterized in that: The cantilever retaining wall (5), the cushion layer (3), the foam lightweight soil layer (2) and the roadbed (1) are provided with a transverse settlement joint (15) every 30m to 40m, and the settlement joint is filled with waterproof asphalt hemp.

5. The roadbed structure crossing a scenic lake according to claim 1 or 2, characterized in that: The cushion layer (3) is composed of geocells arranged in an upper and lower double layer, the geocells are filled with graded crushed stone, and the width of the cushion layer is equal to the distance between the inner sides of the two vertical walls (8).

6. The roadbed structure crossing a scenic lake according to claim 1 or 2, characterized in that: A lower anti-seepage geomembrane (13) and an upper anti-seepage geomembrane (12) are laid on the lower surface and upper surface of the foamed lightweight soil layer (2), respectively. The compressive strength of the foamed lightweight soil layer is not less than 0.7 MPa.

7. The roadbed structure crossing a scenic lake according to claim 1 or 2, characterized in that: The thickness of the crushed stone cushion layer (4) is 40 cm to 60 cm.

8. The roadbed structure crossing a scenic lake according to claim 1 or 2, characterized in that: The roadbed (1) is composed of improved soil.

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