Structure for transforming urban road behind embankment into embankment top

Abstract

The utility model discloses a structure for transforming an urban road behind an embankment into an embankment top, a post-pouring wall body is arranged on one side, close to the road, of an existing anti-flood wall, foam concrete is arranged on one side, close to the road, of the post-pouring wall body, solid waste utilization materials are arranged on the lower layer of the side, close to the road, of the foam concrete, and filling soil is arranged on the upper layer of the side, close to the road, of the foam concrete. According to the structure, disturbance to an existing dike can be reduced to the maximum extent, solid waste resource utilization is achieved to the maximum extent, meanwhile, the structure is rapid to construct, investment is saved, and the integrity and reliability of the dike structure are effectively guaranteed.

Description

Technical Field

[0001] The utility model belongs to the field of road engineering, and more specifically is a structure used for transforming a city road behind a dike into a dike top type. Background Art

[0002] Under the background of high-quality development of the Yangtze River Economic Belt, the construction of flood control, transportation, landscape and other projects and infrastructure that benefit the people in the waterfront areas of the provinces and cities along the river are constantly improving, in order to make up for the shortcomings of urban flood control, connect urban transportation along the river, and create a green and ecological waterfront space. Due to historical reasons, many urban embankments use vertical flood walls as water retaining structures, resulting in many problems such as the separation of the internal and external spaces of the embankments, the blocking of traffic connections, the lack of visibility of the river when facing the river, and the waste of riverside resources.

[0003] At present, the common practice is to change the vertical flood control wall into a sloped earth embankment, using gentle slopes to solve the height difference of the plots. Or combine the embankment with the urban road, intensively utilize the land along the river, and open up the traffic connection inside and outside the embankment. However, for the central urban area, urban land is scarce, and the earth embankment slope reduction plan may encroach on the flood discharge section of the river or occupy a large amount of space behind the embankment. In addition, the administrative approval procedures for the demolition and reconstruction of the existing embankments, especially the embankments of important rivers, are complicated, and the construction period is restricted by the flood season.

[0004] Therefore, considering the limited space behind the dike and comprehensively considering the needs of flood control, transportation, landscape, environmental protection, etc., it is very necessary to develop a structural form for raising the urban roads behind the dike. Summary of the invention

[0005] In order to overcome the defects of the above-mentioned background technology, the present invention provides a structure for transforming the urban road behind the dike into a dike top type, which is quick to construct and improves the integrity and reliability of the dike structure.

[0006] In order to solve the above technical problems, the technical solution adopted by the present invention is:

[0007] A structure for transforming an urban road behind a dike into a dike-top type structure, wherein a post-cast wall is arranged on the side of the existing flood wall close to the road, foam concrete is arranged on the side of the post-cast wall close to the road, solid waste utilization materials are arranged on the lower layer of the foam concrete close to the road, and fill soil is arranged on the upper layer.

[0008] Preferably, the side of the foam concrete close to the fill and the solid waste utilization material is a step-shaped transition section.

[0009] Preferably, the height h of each step of the transition section is 0.5-1.0 m, and the width b is 1h-2h.

[0010] Preferably, a polyurethane waterproof layer is provided between the post-cast wall and the foam concrete.

[0011] Preferably, the thickness of the polyurethane waterproof layer is 2 mm.

[0012] Preferably, an impermeable geomembrane is provided between the foam concrete and the fill or solid waste utilization material.

[0013] Preferably, the thickness of the anti-seepage geomembrane is 0.5 mm.

[0014] Preferably, the diameter of the main reinforcement in the post-cast wall is not less than 16 mm.

[0015] Preferably, embedded reinforcement is provided between the post-cast wall and the existing flood control wall, with an embedded reinforcement depth of 300 mm and an embedded reinforcement spacing of 500 mm.

[0016] Preferably, the solid waste material is the resource utilization of the excavated existing rear buttress, specifically, cement, lime and curing agent are added to the existing rear buttress solid waste material, wherein the weight ratio is 5-10% cement, 1-3% lime, and 0.1-0.3% curing agent.

[0017] The beneficial effects of the present invention are as follows: the structure proposed by the present invention can minimize the disturbance to the existing levee and realize the resource utilization of solid waste to the greatest extent. At the same time, the structure is quick to construct, saves investment, and effectively ensures the integrity and reliability of the levee structure. Specifically, (1) the structure ensures the reliability of the junction between the new and old levees and the overall stability of the wall by planting reinforcement in the existing flood wall and then pouring concrete, and pouring lightweight fillers behind the wall, while effectively solving the problems of large engineering volume of post-poured reinforced walls and large space occupied behind the levee. (2) the structure rebuilds the anti-seepage system of the levee structure through a double-layer waterproof system behind the wall, effectively solving the problem of leakage behind the flood wall during the flood season. (3) the structure not only alleviates environmental pressure but also solves the problem of raw materials for road construction by making resource utilization of the main solid waste generated during the construction process. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a cross-sectional view of the existing urban road behind the dike in the embodiment;

[0019] Figure 2 It is a cross-sectional view of a structure in which a city road behind a dike is transformed into a dike-top type structure according to this embodiment.

[0020] In the figure: 1-existing flood control wall, 2-post-cast wall, 3-embedded reinforcement, 4-polyurethane waterproofing layer, 5-foamed concrete, 6-anti-seepage geomembrane, 7-normal fill, 8-existing ground line, 9-existing rear abutment, 10-solid waste utilization material. DETAILED DESCRIPTION

[0021] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0022] This embodiment can effectively utilize the space behind the vertical flood wall as road widening and greening landscaping. The dike and road are rebuilt as a whole to prevent seepage from the dike, and while the dike is reinforced, the dike top road is close to the river, fully meeting the needs of citizens to watch the river and play in the water.

[0023] After the urban road behind the levee is changed to the levee top type, the fill behind the existing flood control wall increases, and the stress of the levee structure changes. The reinforcement of the existing levee, especially the treatment of the junction of the new and old levees, is the key to ensuring the overall stability and anti-seepage performance of the levee. At present, similar projects often have problems such as uneven settlement behind the levee due to improper junction of the new and old roadbeds, affecting the use of the levee top road, or excessive active earth pressure behind the wall fill, resulting in large amount of reinforced concrete engineering behind the wall, large space behind the levee, and poor economy.

[0024] The structure proposed in this embodiment can minimize the disturbance to the existing embankment and maximize the resource utilization of solid waste. At the same time, the structure is quick to construct, saves investment, and effectively ensures the integrity and reliability of the embankment structure.

[0025] A structure of the present embodiment for transforming the urban road behind the dike into a dike top type includes a post-cast wall 2 located on the back of the existing flood wall 1, foamed concrete 5, solid waste utilization material 10, normal fill 7, a polyurethane waterproof layer 4 between the post-cast wall 2 and the foamed concrete 5, and an anti-seepage geomembrane 6 between the foamed concrete 5 and the normal fill 7.

[0026] The post-cast wall 2 is cast with C30 reinforced concrete, and the main reinforcement arranged in the wall has a diameter of not less than 16 mm.

[0027] The post-cast wall 2 and the existing flood wall 1 are treated with embedded reinforcement 3 to ensure the integrity between the new and old embankments. The diameter of the steel bars used is 32mm, the depth of the embedded reinforcement 3 is not less than 300mm, and the spacing between the embedded reinforcement 3 is 500mm.

[0028] The polyurethane waterproof layer 4 is located between the post-cast wall 2 and the foam concrete 5, and the thickness of the polyurethane waterproof layer 4 is 2 mm.

[0029] The compressive strength grade of the foamed concrete 5 is not less than 1.2MPa, the bulk density is 11.5-12.5kN / m3, and the performance indicators and material requirements of the foamed concrete 5 must meet the requirements of the "Technical Code for Bubble Mixed Lightweight Soil Filling Engineering" (CJJ / T 177-2012).

[0030] A transition section is arranged between the lightweight concrete and the normal roadbed filler, and the transition section is connected in a step-like manner, with a step height h of 0.5 to 1.0 m and a step width b of 1h to 2h.

[0031] An impermeable geomembrane 6 is arranged at the interface between the foamed concrete 5 and the normal roadbed filler. The impermeable geomembrane 6 is made of HDPE, with a thickness of 0.5 mm, a longitudinal and transverse tensile strength greater than 18 MPa, a longitudinal and transverse elongation at break ≥450%, a right-angle tear strength ≥80 N / mm, and a lap method of hot welding with a lap width greater than 50 cm.

[0032] The solid waste material 10 is a resource utilization of the excavated back platform, which is paved above the current horizon 8 and below the fill layer 7. Specifically, cement, lime and curing agent are added to the back platform solid waste, wherein the weight ratio is 5-10% cement, 1-3% lime, and 0.1-0.3‰ curing agent.

[0033] The material requirements and compaction requirements of normal fill 7 must meet the requirements of "Urban Road Subgrade Design Code" (CJJ194-2013).

[0034] A construction method for transforming a city road behind a dike into a dike-top structure, characterized by comprising:

[0035] The first step is to dig out the back platform of the existing flood control wall 1 and stack it in the material area for standby;

[0036] The second step is to plant reinforcement 3 on the back of the existing flood wall 1 and cast the post-cast wall 2;

[0037] The third step is to apply the polyurethane waterproof layer 4 when the concrete strength of the post-cast wall 2 reaches 75% of the design strength;

[0038] The fourth step is to pour the foamed concrete 5 in layers from bottom to top after the polyurethane waterproof layer 4 is completely cured.

[0039] Step 5: When the foamed concrete 5 reaches the designed strength, the waterproof geomembrane is laid on the interface of the transition section;

[0040] Step 6: Mix cement, lime and curing agent into the excavated back slab solid waste to form solid waste utilization material 10;

[0041] The seventh step is to lay the solid waste utilization material 10, the normal filling material 7 and the road surface structure layer in layers behind the anti-seepage geomembrane 6.

[0042] In general, the invention proposes a structure that transforms the urban road behind the dike into a dike-top structure, which can effectively utilize the space of the rear platform for road widening and greening. The dike-road integrated reconstruction of the dike anti-seepage system can achieve dike reinforcement while the dike-top road is close to the river, fully meeting the needs of citizens to watch the river and play in the water.

[0043] like Figure 1As shown, the roadside of the urban road behind the dike to be renovated described in the present invention is the existing flood wall 1 and the existing rear abutment 9, wherein the rear abutment is located on the back of the existing flood wall 1.

[0044] like Figure 2 As shown, a structure for transforming an urban road behind a dike into a dike-like structure includes a post-cast wall 2 located on the back of an existing flood wall 1, foamed concrete 5, solid waste utilization materials 10, normal fill 7, a polyurethane waterproof layer 4 between the post-cast wall 2 and the foamed concrete 5, and an anti-seepage geomembrane 6 between the foamed concrete 5 and the normal fill 7.

[0045] The post-cast wall 2 is cast with C30 reinforced concrete, and the main reinforcement arranged in the wall has a diameter of not less than 16 mm.

[0046] The post-cast wall 2 and the existing flood wall 1 are treated with embedded reinforcement 3 to ensure the integrity between the new and old embankments. The diameter of the steel bars used is 32mm, the depth of the embedded reinforcement 3 is not less than 300mm, and the spacing between the embedded reinforcement 3 is 500mm.

[0047] The polyurethane waterproof layer 4 is located between the post-cast wall 2 and the foam concrete 5, and the thickness of the polyurethane waterproof layer 4 is 2 mm.

[0048] The compressive strength grade of the foamed concrete 5 is not less than 1.2MPa, and the bulk density is 11.5-12.5kN / m3. The performance indicators and material requirements of the foamed concrete 5 must meet the requirements of the "Technical Code for Bubble Mixed Lightweight Soil Filling Engineering" (CJJ / T177-2012).

[0049] A transition section is arranged between the lightweight concrete and the normal road soil, and the transition section is connected in a step-like manner, with a step height h of 0.5 to 1.0 m and a step width b of 1h to 2h.

[0050] An impermeable geomembrane 6 is arranged at the interface between the foamed concrete 5 and the normal fill 7. The impermeable geomembrane 6 is made of HDPE, has a thickness of 0.5 mm, a longitudinal and transverse tensile strength greater than 18 MPa, a longitudinal and transverse elongation at break ≥450%, a right-angle tear strength ≥80 N / mm, is overlapped by hot welding, and has an overlap width greater than 50 cm.

[0051] The solid waste utilization material 10 is the resource utilization of the excavated back platform. Specifically, cement, lime and curing agent are added to the back platform solid waste, wherein the weight ratio is 5-10% cement, 1-3% lime and 0.1-0.3‰ curing agent.

[0052] The material requirements and compaction requirements of normal fill 7 must meet the requirements of "Urban Road Subgrade Design Code" (CJJ194-2013).

[0053] In the embodiment, a construction method for transforming a city road behind a dike into a dike-top structure is characterized by comprising:

[0054] The first step is to dig out the back platform of the existing flood control wall 1 and stack it in the material area for standby;

[0055] The second step is to plant reinforcement 3 on the back of the existing flood wall 1 and cast the post-cast wall 2;

[0056] The third step is to apply the polyurethane waterproof layer 4 when the concrete strength of the post-cast wall 2 reaches 75% of the design strength;

[0057] The fourth step is to pour the foamed concrete 5 in layers from bottom to top after the polyurethane waterproof layer 4 is completely cured.

[0058] Step 5: When the foamed concrete 5 reaches the designed strength, the waterproof geomembrane is laid on the interface of the transition section;

[0059] Step 6: Mix cement, lime and curing agent into the excavated back slab solid waste to form solid waste utilization material 10;

[0060] The seventh step is to lay the solid waste utilization material 10, the normal filling material 7 and the road surface structure layer in layers behind the anti-seepage geomembrane 6.

[0061] It should be understood that those skilled in the art can make improvements or changes based on the above description, and all these improvements and changes should fall within the scope of protection of the appended claims of the present invention.

Claims

1. A structure for transforming a city road behind a dike into a dike-top structure, characterized in that: A post-cast wall (2) is provided on the side of the existing flood wall (1) close to the road, and foamed concrete (5) is provided on the side of the post-cast wall (2) close to the road. Solid waste utilization material (10) is provided on the lower layer of the foamed concrete (5) close to the road, and backfill (7) is provided on the upper layer.

2. The structure for transforming a city road behind a dike into a dike top type according to claim 1, characterized in that: The side of the foamed concrete (5) close to the fill (7) and the solid waste utilization material (10) is a step-shaped transition section.

3. The structure for transforming the urban road behind the dike into a dike top type according to claim 2, characterized in that: The height h of each step of the transition section is 0.5-1.0m, and the width b is 1h-2h.

4. The structure for transforming a city road behind a dike into a dike top structure according to claim 1, characterized in that: A polyurethane waterproof layer (4) is provided between the post-cast wall (2) and the foamed concrete (5).

5. The structure for transforming the urban road behind the dike into a dike top type according to claim 4, characterized in that: The thickness of the polyurethane waterproof layer (4) is 2 mm.

6. The structure for transforming a city road behind a dike into a dike top type according to claim 1, characterized in that: An impermeable geomembrane (6) is provided between the foamed concrete (5) and the fill (7) or the solid waste utilization material (10).

7. The structure for transforming the urban road behind the dike into a dike top type according to claim 6, characterized in that: The thickness of the anti-seepage geomembrane (6) is 0.5 mm.

8. The structure for transforming a city road behind a dike into a dike top structure according to claim 1, characterized in that: The diameter of the main reinforcement in the post-cast wall (2) is not less than 16 mm.

9. The structure for transforming a city road behind a dike into a dike top type according to claim 1, characterized in that: An embedded reinforcement bar (3) is provided between the post-cast wall (2) and the existing flood control wall (1), the embedded reinforcement bar (3) has a depth of 300 mm, and the spacing between the embedded reinforcement bars (3) is 500 mm.

10. The structure for transforming a city road behind a dike into a dike top type according to claim 1, characterized in that: The solid waste utilization material (10) is a resource utilization of the excavated existing rear buttress (9). Specifically, cement, lime and curing agent are added to the solid waste of the existing rear buttress (9), wherein the weight ratio is 5-10% cement, 1-3% lime and 0.1-0.3% curing agent.

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