Mountainous area high-fill conical slope light foam soil retaining wall structure

Abstract

The utility model provides a mountainous area high-fill conical slope light foam soil retaining wall structure, which is characterized in that steps are excavated on a conical slope road section between a high-fill roadbed and a concrete shoulder retaining wall to form a transverse and longitudinal three-surface stepped platform; a broken stone hardcore and a PVC drainage pipe are arranged at the bottom of the three-face stepped platform, a light foam soil retaining wall foundation is poured on the broken stone hardcore and located on the outer side of the three-face stepped platform, broken stone blind ditches, the PVC drainage pipe and an anti-seepage geomembrane are arranged on steps, and anchoring steel bars are transversely arranged on the bottom-layer steps and the top-layer steps. Further, the high fill roadbed and the light foam soil retaining wall are transversely tied and anchored; angle steel is installed on the light foam soil retaining wall foundation in a layered mode, and the concrete panel is supported and hung through the angle steel; light foam soil is poured in a step platform of the concrete panel, the high-fill roadbed and the concrete shoulder retaining wall in a layered mode to form a light foam soil retaining wall. Through the light foam soil retaining wall, the land use range of the retaining wall cone slope of the high fill roadbed section is greatly saved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to retaining wall construction technical field, concretely is a kind of mountainous high fill cone slope light foam soil retaining wall structure. BACKGROUND

[0002] In the mountainous highway construction process, due to the terrain difference, inaccurate elevation data collection, too large high retaining wall cone slope land range, insufficient high retaining wall cone slope land range and other problems, it is easy to form gap in retaining wall and roadbed filling combination part, but due to the contradiction between land acquisition and roadbed construction time, high fill roadbed section filling engineering quantity is large, and the construction period is tight, must be constructed in advance, when the roadbed gap is formed, due to the large height difference, it does not have the cone slope filling condition, how to treat high fill roadbed retaining wall cone gap, ensure its filling quality and slope stability become the problem to be solved. UTILITY MODEL CONTENTS

[0003] In view of the above technical problems, the utility model aims at providing a kind of mountainous high fill cone slope light foam soil retaining wall structure, by using the retaining wall structure described above, it can effectively solve the problem of high fill in excavation and filling combination part cone slope land, by light foam soil retaining wall, greatly save high fill roadbed section retaining wall cone slope land range, solve its cone slope land shortage problem, design principle is clear, construction technology is simple.

[0004] In order to realize the above technical features, the purpose of the utility model is realized as follows: a kind of mountainous high fill cone slope light foam soil retaining wall structure, including high fill roadbed, high fill roadbed and concrete shoulder retaining wall between cone slope road section excavation step, form three-dimensional ladder type platform in horizontal and vertical direction;Three-dimensional ladder type platform bottom is provided with gravel cushion and PVC drain pipe, and light foam soil retaining wall foundation is located on the gravel cushion and outside the three-dimensional ladder type platform and is vertically poured;Gravel blind ditch, PVC drain pipe and impermeable geomembrane are arranged on the step, anchor reinforcement is arranged in horizontal direction on the bottom step and top step, to anchor the high fill roadbed and light foam soil retaining wall in horizontal direction;Angle steel is installed on the light foam soil retaining wall foundation in layers, and concrete panel is hung by using angle steel support;Light foam soil is poured in layers in the step platform of concrete panel and high fill roadbed and concrete shoulder retaining wall to form light foam soil retaining wall.

[0005] The angle steel is inserted into the light foam soil retaining wall foundation at a certain interval, and the bottom end of the angle steel penetrates the gravel cushion and is anchored to a certain depth below the filling platform.

[0006] The light foam soil retaining wall foundation extends inward by a certain width in the width direction, so that the light foam soil retaining wall foundation forms a foundation counterpressure under the self-weight of the light foam soil.

[0007] When installing the angle steel and the concrete panel in layers, the angle steel and the concrete panel are connected and fixed by connecting steel bars, and the gaps between the concrete panels are combined by cement mortar, and the installation height is matched with the pouring layer thickness of the light and foamed soil retaining wall.

[0008] The light and foamed soil retaining wall and the high fill roadbed are transitioned by longitudinal steps, and after the light and foamed soil retaining wall and the concrete shoulder retaining wall are transitioned by longitudinal steps, the light and foamed soil retaining wall extends to the rear side of the retaining wall, and the concrete shoulder retaining wall forms a horizontal support.

[0009] The gravel cushion layer and the light and foamed soil top are paved with an impermeable geomembrane.

[0010] The light and foamed soil bottom and the light and foamed soil top of the light and foamed soil retaining wall are respectively provided with at least two layers of galvanized iron wire meshes, and the middle part is provided with galvanized iron wire meshes in layers according to a certain height.

[0011] The light and foamed soil retaining wall top guardrail foundation is designed as a counter-pressure type guardrail foundation, and the high fill road section adopts a high-grade concrete crash barrier.

[0012] The utility model has the following beneficial effects:

[0013] The mountainous high fill conical slope light and foamed soil retaining wall structure has the advantages that the design and construction of the retaining wall structure can effectively solve the land use problem of the conical slope of the high fill at the excavation and filling combined part, the light and foamed soil retaining wall greatly saves the land use range of the retaining wall conical slope of the high fill roadbed section, solves the problem of insufficient land use of the conical slope, and has clear design principle and simple construction process. BRIEF DESCRIPTION OF DRAWINGS

[0014] The utility model will be further described in connection with the drawings and embodiments.

[0015] Figure 1 It is a schematic view of the cross section of the outer surface of the retaining wall.

[0016] Figure 2 It is a schematic view of the cross section of the inner part of the retaining wall.

[0017] Figure 3 It is a schematic view of the layout of the retaining wall surface.

[0018] Figure 4 It is a schematic view of the layout of the retaining wall surface.

[0019] Figure 5 It is a front view of the layout of the retaining wall foundation and panel.

[0020] Figure 6 It is a top view of the layout of the retaining wall foundation and panel.

[0021] In the figure: 1 high fill subgrade, 2 concrete shoulder retaining wall, 3 gravel cushion, 4 lightweight foam soil retaining wall foundation, 5 angle steel, 6 concrete panel, 7 lightweight foam soil retaining wall, 8 impermeable geomembrane, 9 galvanized iron wire mesh, 10 gravel blind drain, 11 PVC drain pipe, 12 anchoring steel bar, 13 connecting steel bar, 14 cement mortar, 15 un-screened gravel, 16 guardrail foundation, 17 anti-collision guardrail. DETAILED DESCRIPTION

[0022] The embodiments of the present application will be further described below with reference to the drawings.

[0023] Example 1:

[0024] Referring to Figures 1-6 A mountainous high fill conical slope lightweight foam soil retaining wall structure, comprising a high fill subgrade 1, a conical slope section between the high fill subgrade 1 and a concrete shoulder retaining wall 2 is excavated in steps to form a three-sided ladder-type platform in the horizontal and vertical directions; a gravel cushion 3 and a PVC drain pipe 11 are arranged at the bottom of the three-sided ladder-type platform, a lightweight foam soil retaining wall foundation 4 is cast by vertical formwork on the gravel cushion 3 and outside the three-sided ladder-type platform, gravel blind drains 10, PVC drain pipes 11 and impermeable geomembranes 8 are arranged on the steps, anchoring steel bars 12 are arranged horizontally at the bottom and top steps to horizontally anchor the high fill subgrade 1 and the lightweight foam soil retaining wall 7; angle steels 5 are installed in layers on the lightweight foam soil retaining wall foundation 4, and the angle steels support and hang the concrete panels 6; lightweight foam soil is cast in layers in the steps between the concrete panels 6 and the high fill subgrade 1 and the concrete shoulder retaining wall 2 to form the lightweight foam soil retaining wall 7. Through the design and construction of the above retaining wall structure, the problem of land use at the conical slope of the excavation and filling combination part of the high fill can be effectively solved, the land use range of the retaining wall conical slope of the high fill subgrade section is greatly saved through the lightweight foam soil retaining wall, the problem of insufficient land use at the conical slope is solved, the design principle is clear, and the construction process is simple.

[0025] Further, the angle steels 5 need to be inserted into the lightweight foam soil retaining wall foundation 4 at a certain interval, the bottom end of the angle steel 5 penetrates through the gravel cushion 3 and is anchored to a certain depth below the filling platform. The above structure is used to enhance the structural strength and stability of the lightweight foam soil retaining wall foundation 4.

[0026] Further, the lightweight foam soil retaining wall foundation 4 extends inward by a certain width in the width direction, so that the lightweight foam soil retaining wall foundation 4 forms foundation counterpressure under the self-weight of the lightweight foam soil. In turn, the stability is enhanced.

[0027] Further, when the angle steels 5 and the concrete panels 6 are installed in layers, the connecting steel bars 13 are used to connect and fix the angle steels 5 and the concrete panels 6, the cement mortar 14 is used to combine the gaps between the concrete panels 6 and the panels, the installation height is matched with the pouring layer thickness of the lightweight foam soil retaining wall 7.

[0028] Further, the light foam soil retaining wall 7 and the high fill embankment 1 are transitioned by longitudinal steps; after the light foam soil retaining wall 7 and the concrete shoulder retaining wall 2 are transitioned by longitudinal steps, the light foam soil retaining wall 7 extends to the rear side of the retaining wall, and the concrete shoulder retaining wall 2 forms a horizontal support.

[0029] Further, the gravel cushion 3 and the top of the light foam soil are paved with the impermeable geomembrane 8. The impermeable geomembrane 8 forms a waterproof and drainage system, and has a good impermeable effect.

[0030] Further, the bottom and the top of the light foam soil of the light foam soil retaining wall 7 are respectively provided with at least two layers of galvanized iron wire meshes 9, and the galvanized iron wire meshes 9 are arranged in layers at a certain height in the middle part. The galvanized iron wire meshes 9 are used to enhance the internal structural stability of the light foam soil retaining wall 7.

[0031] Further, the light foam soil is formed by segmental pouring, and the settlement joints are arranged at a certain distance in the longitudinal direction.

[0032] Further, the top of the light foam soil retaining wall 7 is provided with the counter-pressure type guardrail foundation 16, and the high fill section is provided with the high-grade concrete crash barrier 17. Therefore, the crash resistance of the crash barrier is effectively enhanced.

[0033] Embodiment 2:

[0034] A specific construction method of the mountainous high fill conical slope light foam soil retaining wall structure is disclosed.

[0035] The mountainous high fill conical slope light foam soil retaining wall structure mainly comprises a fill embankment 1, a concrete shoulder retaining wall 2, a light foam soil retaining wall 7, a guardrail foundation 16 and a crash barrier 17.

[0036] Firstly, a step is excavated at a gap of a conical slope joint part of the high fill embankment 1 and the concrete shoulder retaining wall 2, the minimum width of the bottom is 3 m, a three-side ladder type platform with a width of 1.5 m and a height of 1.0 m is excavated according to a slope ratio of 1:1.5, and the step is provided with an inward inclination of 4%; a 30 cm thick gravel cushion 3 is paved on the bottom of the platform, gravel blind ditches 10 are arranged on the inner sides of the longitudinal and horizontal steps, transverse PVC drainage pipes 11 are arranged at a certain distance in the gravel cushion 3 and the gravel blind ditches 10, the gravel cushion and the gravel blind ditches are paved with impermeable geomembranes 8, and a waterproof and drainage system of a light foam soil retaining wall base is formed.

[0037] Then excavate the light foam soil retaining wall foundation 4, excavate the retaining wall foundation on the outside vertical surface of the platform, lay a gravel cushion 3 at the bottom of the foundation, insert angle steel 5 into the compacted roadbed with a longitudinal spacing of 90 cm, the angle steel is 26 cm away from the concrete panel 6, the angle steel 5 is inserted into the compacted roadbed with an anchoring depth of 1.0 m, the formwork is poured with C30 concrete foundation, the foundation width is 1.6 m and the height is 0.3 m, of which 1.3 m of the foundation width is located below the light foam soil retaining wall 7; the first layer of the inner side of the step, at the joint between the light foam soil and the high fill roadbed, insert transversely 25 mm diameter anchor steel 12 with a longitudinal spacing of 80 cm, to improve the overall stability of the joint between the two.

[0038] Build three layers of concrete panels 6 along the longitudinal direction of the angle steel, the concrete panel width is 90 cm and the height is 30 cm, the panels are built with cement mortar jointing, after the concrete panel building is completed, pour the first layer of 0.5 m thick light foam soil, then lay the first layer of galvanized iron wire mesh 9 after the strength reaches the standard, then continue to build the concrete panel 6, pour the second layer of 0.5 m thick light foam soil, and then lay the second layer of galvanized iron wire mesh 9 after the strength reaches the standard; the subsequent alternation of concrete panel 6 building and light foam soil pouring process is carried out, one layer of galvanized iron wire mesh is set at intervals of 2.0 m, and transverse PVC drainage pipes are buried according to the height of the step; within 1.0 m from the top, pour and lay the galvanized iron wire mesh 9 in two layers with a thickness of 0.5 m.

[0039] After the light foam soil retaining wall 7 is poured to the designed elevation, lay the anti-seepage geomembrane 8, then lay the 20 cm thick roadbed unsorted gravel 15; pour the C30 concrete guardrail foundation 16 on it, which is 20 cm thick reinforced concrete, the guardrail foundation 16 extends 3.0 m inward while ensuring the width of the guardrail, increases the bearing area with the top of the light foam soil, and uses the weight of the pavement structure layer to form a counter-pressure type guardrail foundation, then the formwork is poured with the crash barrier 17 to improve the crash barrier capacity of the light foam soil retaining wall of the high fill roadbed.

Claims

1. A mountainous high fill conic slope light foam soil retaining wall structure, characterized in that, The application relates to a light-weight foam soil retaining wall structure, which comprises a high-filled roadbed (1), a stepped platform formed by excavating a slope section between the high-filled roadbed (1) and a concrete shoulder retaining wall (2), a gravel cushion (3) and a PVC drainage pipe (11) arranged at the bottom of the stepped platform, a light-weight foam soil retaining wall foundation (4) arranged on the gravel cushion (3) and outside the stepped platform, a gravel blind ditch (10), the PVC drainage pipe (11) and a seepage-proof geomembrane (8) arranged on the stepped platform, anchor steel bars (12) arranged transversely on the bottom and top stepped platform parts, and the light-weight foam soil retaining wall (7) transversely connected with the high-filled roadbed (1) through the anchor steel bars (12); angle steels (5) are arranged on the light-weight foam soil retaining wall foundation (4) in layers, and a concrete panel (6) is hung and supported by the angle steels (5); and light-weight foam soil is poured in layers on the concrete panel (6) and the stepped platform of the high-filled roadbed (1) and the concrete shoulder retaining wall (2) to form the light-weight foam soil retaining wall (7).

2. The mountainous high fill conic slope light-weight foamed soil retaining wall structure according to claim 1, characterized in that: The angle steels (5) are inserted into the light-weight foam soil retaining wall foundation (4) at certain intervals, the bottom ends of the angle steels (5) penetrate through the gravel cushion (3) and are anchored into the filled platform to a certain depth.

3. The mountainous high fill conic slope light-weight foamed soil retaining wall structure according to claim 1 or 2, characterized in that: The light-weight foam soil retaining wall foundation (4) extends inward in the width direction to a certain width, so that the light-weight foam soil retaining wall foundation (4) forms foundation counterpressure under the self-weight of the light-weight foam soil.

4. The mountainous high fill conic slope light-weight foamed soil retaining wall structure according to claim 3, characterized in that: When the angle steels (5) and the concrete panel (6) are installed in layers, the angle steels (5) and the concrete panel (6) are connected and fixed by connecting steel bars (13), the gaps between the concrete panels (6) are combined by cement mortar (14), and the installation height is matched with the pouring layer thickness of the light-weight foam soil retaining wall (7).

5. The mountainous high fill conic slope light-weight foamed soil retaining wall structure according to claim 3, characterized in that: The light-weight foam soil retaining wall (7) is longitudinally connected with the high-filled roadbed (1) through a stepped platform, and after the light-weight foam soil retaining wall (7) is longitudinally connected with the concrete shoulder retaining wall (2) through a stepped platform, the light-weight foam soil retaining wall (7) extends to the rear side of the retaining wall and is horizontally supported by the concrete shoulder retaining wall (2).

6. The mountainous high fill conic slope light-weight foamed soil retaining wall structure according to claim 1, characterized in that: The gravel cushion (3) and the top of the light-weight foam soil are provided with the seepage-proof geomembrane (8).

7. The mountainous high fill conic slope light-weight foamed soil retaining wall structure according to claim 1, characterized in that: The bottom and the top of the light-weight foam soil of the light-weight foam soil retaining wall (7) are respectively provided with at least two layers of galvanized iron wire meshes (9), and the galvanized iron wire meshes (9) are arranged in layers at certain heights in the middle part.

8. The mountainous high fill conic slope light-weight foamed soil retaining wall structure according to claim 1, characterized in that: The top of the light-weight foam soil retaining wall (7) is provided with a counterpressure type guardrail foundation (16), and a high-grade concrete crash barrier (17) is arranged on the high-filled road section.

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