A wall support structure based on waste guardrail columns and its construction method

Abstract

The invention discloses a supporting wall structure based on waste guardrail columns, which is used for reinforcing existing retaining walls. The supporting wall structure is arranged closely to the outer side of the retaining wall at intervals in the horizontal direction and fixed on the foundation. The supporting wall structure comprises a supporting wall, a foundation and a plurality of waste guardrail columns. The foundation is connected to the supporting wall and buried in the foundation. The foundation, the supporting wall and the foundation are all buried with waste guardrail columns arranged at intervals in the horizontal direction and erected. The waste guardrail columns are used for reinforcing the supporting wall structure and reinforcing the foundation. The invention has the advantages of low cost, simple and convenient construction, economy and environmental protection.

Description

Technical Field

[0001] The invention relates to the field of recycling waste guardrail posts in roadbed engineering and geotechnical engineering, and in particular to a supporting wall structure based on waste guardrail posts and a construction method thereof. Background Art

[0002] With the continuous increase in the mileage of highways and urban roads, especially expressways, the extension of operating time, and the improvement of safety protection level, a large number of original road engineering corrugated guardrails need to be repaired, renovated or upgraded, thus accumulating a large number of dismantled and recycled waste guardrail columns, making how to improve the recycling and reuse rate of waste guardrail columns a difficult problem in current road maintenance management. At the same time, some existing retaining walls have problems such as insufficient strength, stiffness and stability due to the combined effects of various loads and environmental factors during long-term operation, resulting in potential instability risks or local deformation, and are in urgent need of repair and reinforcement. The traditional demolition and reconstruction method requires long-term closure of traffic for construction, which has a great social impact and the risk of slope instability; the anchoring method is mainly suitable for retaining walls of cement concrete and reinforced concrete, and its construction process is relatively complicated and the cost of repair and reinforcement is high; the method of widening the foundation and thickening the wall outside the existing retaining wall, in addition to the need to dig out a part of the wall and fill the soil during construction, there is a risk of slope instability, and the construction quality of the combination of the new and old foundations and walls is not easy to control, and it takes up more space. Summary of the invention

[0003] The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art and provide a wall support structure based on waste guardrail columns and a construction method thereof which is low in cost, simple and convenient to construct, beneficial to the reinforcement of existing retaining walls, and economical and environmentally friendly.

[0004] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0005] A support wall structure based on waste guardrail columns, the support wall structure is arranged closely to the outer side of a retaining wall in a horizontal direction and fixed on a foundation, the support wall structure comprises a support wall, a foundation and a plurality of waste guardrail columns, the foundation is connected to the support wall and buried in the foundation, the foundation, the support wall and the foundation are all buried with waste guardrail columns arranged in a horizontal direction and erected at intervals, the waste guardrail columns are used for reinforcing the support wall structure and the foundation.

[0006] As a further improvement to the above technical solution:

[0007] The waste guardrail column includes foundation-foundation reinforcement, and the foundation-foundation reinforcement extends from the foundation into the foundation.

[0008] The waste guardrail column comprises a foundation-foundation-supporting wall reinforcement, and the foundation-foundation-supporting wall reinforcement extends from the supporting wall through the foundation to the foundation.

[0009] The waste guardrail column comprises a foundation-supporting wall reinforcement, and the foundation-supporting wall reinforcement extends from the supporting wall to the foundation.

[0010] The waste guardrail upright column comprises internal reinforcement of the supporting wall, and the internal reinforcement of the supporting wall is buried in the supporting wall.

[0011] The length direction of the retaining wall is taken as the y direction, the width of the supporting wall along the y direction is W1, and the width of the foundation along the y direction is W2, wherein W1<W2.

[0012] Taking the height direction of the retaining wall as the z direction, the height of the top surface of the supporting wall relative to the top surface of the foundation along the z direction is H1, and the height of the top surface of the retaining wall relative to the top surface of the foundation along the z direction is H2, wherein H1≤H2.

[0013] Taking the width direction of the retaining wall as the x-direction, the length of the top of the supporting wall along the x-direction is L1, and the length of the bottom of the supporting wall along the x-direction is L2, wherein L1<L2.

[0014] As a general inventive concept, the present invention also provides a construction method of a wall support structure based on waste guardrail columns, comprising the following steps:

[0015] S1. Determine the position of the supporting wall structure and excavate the foundation pit;

[0016] S2. Preliminarily divide the waste guardrail posts into three groups, drive the lower sections of the first group of waste guardrail posts into the foundation according to preset requirements, and fix the lower sections of the second group of waste guardrail posts at the location of the foundation;

[0017] S3, pouring foundation concrete, and removing the formwork after the concrete strength is formed;

[0018] S4. According to the preset requirements, the third group of waste guardrail posts are arranged at the location of the supporting wall;

[0019] S5, pouring the supporting wall concrete in layers, and removing the formwork after the concrete strength is formed;

[0020] S6. Level the site.

[0021] As a further improvement to the above technical solution:

[0022] In the steps S2 and S4, the waste guardrail posts are extended or shortened according to actual needs, and the extension points of adjacent waste guardrail posts are staggered in the vertical direction.

[0023] In step S2, the first group of waste guardrail posts is divided into two groups, wherein the upper ends of the waste guardrail posts in one group are reserved at the location of the foundation, and the waste guardrail posts in the other group pass through the foundation and the upper ends are reserved at the location of the supporting wall.

[0024] In step S2, the upper sections of the second group of waste guardrail posts are reserved at the location of the supporting wall.

[0025] The spacing of the staggered arrangement is greater than 0.05m.

[0026] Compared with the prior art, the advantages of the present invention are:

[0027] The wall support structure and the construction method of the present invention are easy to obtain waste guardrail columns, suitable for a variety of engineering situations, low engineering cost, simple and convenient construction, and used for the external reinforcement of existing retaining walls. The wall support structure has good protection and reinforcement effects, flexible layout, and is easy to construct. There is no need to excavate the back of the retaining wall to fill the soil, and the structural strength of the existing retaining wall is not damaged. Compared with the method of widening the foundation and thickening the wall, the space occupied is small. At the same time, the wall support structure can not only be used for the maintenance and reinforcement of the existing retaining wall, but also can be used to directly reinforce the slope when the wall and the continuous raft foundation are set, which solves the problem of low recycling and reuse rate of waste guardrail columns in road engineering, achieves a good economic and environmental protection effect, and realizes the social demand for energy conservation, environmental protection, sustainable development, and road disaster prevention and mitigation. The waste guardrail columns themselves have sufficient strength and rigidity. The wall support structure of the present invention can effectively and comprehensively reinforce the foundation, roadbed slope and existing retaining wall. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a schematic diagram of the overall layout of the wall support structure of the present invention.

[0029] Figure 2 It is a schematic diagram of the plan layout of the supporting wall structure.

[0030] Figure 3 Schematic diagram of the cross-sectional layout of the support wall structure.

[0031] Figure 4 It is a schematic diagram of the construction method flow of the support wall structure.

[0032] The symbols in the figure represent:

[0033] 1. Support wall structure; 2. Retaining wall; 3. Foundation; 4. Roadbed slope; 11. Waste guardrail columns; 111. Foundation - foundation reinforcement; 112. Foundation - foundation - support wall reinforcement; 113. Foundation - support wall reinforcement; 114. Support wall internal reinforcement; 12. Support wall; 13. Foundation. DETAILED DESCRIPTION

[0034] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. Unless otherwise specified, the instruments or materials used in the present invention are commercially available.

[0035] like Figures 1 to 3 As shown, in this embodiment, a supporting wall structure 1 based on waste guardrail columns 11 is used for external reinforcement of an existing retaining wall 2. Multiple supporting wall structures 1 are arranged at intervals close to the outer side of the retaining wall 2 in the horizontal direction and fixed on the foundation 3. The supporting wall structure includes a supporting wall 12, a foundation 13 and multiple waste guardrail columns 11. The foundation 13 is connected to the supporting wall 12 and buried in the foundation 3. The foundation 13, the supporting wall 12 and the foundation 3 are all buried with waste guardrail columns 11 arranged and erected in the horizontal direction. The waste guardrail columns 11 are used for reinforcing the supporting wall structure 1 and reinforcing the foundation 3.

[0036] In this embodiment, the foundation 13 is connected to the bottom of the supporting wall 12. The waste guardrail columns 11 in the supporting wall structure 1 play a reinforcing role, and the waste guardrail columns 11 themselves have sufficient strength and rigidity characteristics to comprehensively improve the overall strength, rigidity, anti-sliding and anti-overturning stability of the existing retaining wall 2 and the bearing capacity of the foundation 3, and comprehensively reinforce the foundation 3 and the roadbed slope 4 to improve the stability of the roadbed slope 4.

[0037] The supporting wall structure 1 is arranged close to the outer side of the existing retaining wall 2 to resist the earth pressure transmitted by the existing retaining wall 2 which has a potential risk of instability or has undergone local deformation, thereby achieving the effect of external reinforcement of the existing retaining wall 2.

[0038] In this embodiment, the waste guardrail posts 11 are waste guardrail posts 11 that are dismantled and recycled after road engineering maintenance, renovation or upgrading; the supporting wall 12 and the inside of the foundation 13 and the foundation 3 are reinforced by the waste guardrail posts 11; the existing retaining wall 2 is a gravity retaining wall or a light retaining wall that has a potential risk of instability during operation or has undergone local deformation and needs to be repaired and reinforced; the supporting wall structure 1 is added outside the existing retaining wall 2 to comprehensively reinforce the foundation 3, the roadbed slope 4 and the existing retaining wall 2.

[0039] In this embodiment, the waste guardrail column 11 in the foundation 13-supporting wall 12, that is, the foundation-supporting wall reinforcement 113, is embedded in the toe of the retaining wall 2 at the bottom, and a shallow hole is opened at the contact portion between the toe of the retaining wall 2 and the bottom of the waste guardrail column 11. The depth of the shallow hole does not exceed 30 cm, and the hole diameter is slightly larger than the cross-sectional size of the waste guardrail column 11 to ensure that the waste guardrail column 11 is firmly connected to the existing retaining wall 2 without destroying the structural strength of the existing retaining wall 2.

[0040] In this embodiment, the waste guardrail column 11 in the supporting wall 12, that is, the internal reinforcement 114 of the supporting wall, is embedded in the wall of the retaining wall 2 at the bottom, and a shallow hole is opened at the contact portion between the wall of the retaining wall 2 and the bottom of the waste guardrail column 11. The depth of the shallow hole does not exceed 30 cm, and the hole diameter is slightly larger than the cross-sectional size of the waste guardrail column 11 to ensure that the waste guardrail column 11 is firmly connected to the existing retaining wall 2 without destroying the structural strength of the existing retaining wall 2.

[0041] In this embodiment, the spacing, number and length of the waste guardrail columns 11 should be selected according to the geotechnical conditions of the foundation 3 outside the existing retaining wall 2 and the potential sliding surface and the geometric dimensions of the supporting wall 12 and the foundation 13. The length of the waste guardrail columns 11 is extended or shortened as needed; they are arranged in a rectangular grid or plum blossom shape on the plane, with no less than 3 rows in the vertical and horizontal directions.

[0042] In this embodiment, the waste guardrail posts 11 are divided into four types according to their plane layout positions: foundation-foundation reinforcement 111, foundation-foundation-supporting wall reinforcement 112, foundation-supporting wall reinforcement 113 and supporting wall internal reinforcement 114. In practice, the specific type can be selected as needed. Among them, the foundation-foundation reinforcement 111 refers to the waste guardrail column 11 located within the scope of the foundation 13 but not within the scope of the supporting wall 12 on the plane, the lower section of which is driven into the foundation 3, and the upper section is buried in the foundation 13, that is, the waste guardrail column 11 extending from the foundation 13 to the foundation 3, which is used for the reinforcement of the foundation 3 and the reinforcement of the foundation 13; the foundation-foundation-supporting wall reinforcement 112 refers to the waste guardrail column 11 located within the overlapping range of the foundation 3, the foundation 13 and the supporting wall 12 on the plane, the lower section of which is driven into the foundation 3, the middle section is buried in the foundation 13, and the upper section is buried in the supporting wall 12, that is, the waste guardrail column 11 extending from the supporting wall 12 through the foundation 13 to the foundation 3. Used for reinforcing the foundation 3 and reinforcing the base 13 and the support wall 12; the base-support wall reinforcement 113 refers to the old guardrail column 11 located in the overlapping range of the base 13 and the support wall 12 on the plane but not in the range of the foundation 3, the lower section of which is buried in the foundation 13, and the upper section is buried in the support wall 12, that is, the support wall 12 extends to the old guardrail column 11 in the foundation 13, and is used for reinforcement of the foundation 13 and the support wall 12; the support wall internal reinforcement 114 refers to the old guardrail column 11 located in the range of the support wall 12 on the plane but not in the range of the foundation 13, which is completely buried in the support wall 12, that is, the old guardrail column 11 located in the support wall 12, and is used for reinforcement of the support wall 12.

[0043] In this embodiment, the horizontal distance between the centers of adjacent supporting wall structures 1 is not less than 2.0 m.

[0044] The length direction of the retaining wall 2 is the y direction, the width direction of the retaining wall 2 is the x direction, and the height direction of the retaining wall 2 is the z direction. The width of the supporting wall 12 along the y direction is W1, and the width of the foundation 13 along the y direction is W2, wherein W1<W2. The width W1 of the supporting wall 12 is not less than 0.5m. In this embodiment, the three lateral exposed parts of the foundation 13 plane, except for the side close to the existing retaining wall 2, should be no less than 0.2m wider than the two sides of the bottom surface of the supporting wall 12, that is, (W2-W1) / 2≥0.2m.

[0045] The height of the top surface of the supporting wall 12 relative to the top surface of the foundation 13 along the z direction is H1, and the height of the top surface of the retaining wall 2 relative to the top surface of the foundation 13 along the z direction is H2, where H1≤H2. In this embodiment, the top surface height of the supporting wall 12 does not exceed the top height of the existing retaining wall 2.

[0046] The length of the top of the support wall 12 along the x direction is L1, and the length of the bottom of the support wall 12 along the x direction is L2, wherein L1<L2. That is, the cross section of the support wall 12 is narrow at the top and wide at the bottom.

[0047] In this embodiment, the buried depth of the foundation 13 is not less than 1.0m, and a horizontal clear spacing of not less than 0.3m is reserved between the foundations 13 of adjacent supporting wall structures 11. In other embodiments, the foundations 13 of each supporting wall structure 1 can be connected to form an integral raft foundation to achieve the same or similar technical effects.

[0048] Figure 4 The present invention shows a construction method of a wall support structure 1 based on waste guardrail columns 11 for external reinforcement of an existing retaining wall 2, comprising the following steps:

[0049] S1: Excavation of foundation pit: According to the layout of each supporting wall structure 1, construction layout is carried out and the site is leveled, and the foundation pit is excavated to the specified burial depth to ensure that the base is compacted and leveled;

[0050] S2: Drive the old guardrail columns 11 into the foundation 3 for reinforcement and the foundation 13 for reinforcement: drive the lower sections of the foundation-foundation reinforcement 111 and the foundation-foundation-support wall reinforcement 112 within the scope of the foundation 13 on the plane into the foundation 3 at the specified depth, wherein the upper section of the foundation-foundation reinforcement 111 is reserved inside the foundation 13, the middle section of the foundation-foundation-support wall reinforcement 112 is located in the foundation 13, and the upper section is reserved inside the support wall 12; the lower section of the foundation-support wall reinforcement 113 is located inside the foundation 13 and the bottom is embedded in the retaining wall 2, and the upper section is reserved inside the support wall 12; at the same time, arrange the old guardrail columns 11 according to the specified number and longitudinal and transverse spacing, set stirrups for the installed old guardrail columns 11, and make necessary extensions or shortenings, wherein the extension points of adjacent old guardrail columns 11 should be staggered by more than 0.05m up and down;

[0051] S3: pouring foundation 13 concrete: setting up the foundation 13 concrete formwork, pouring the foundation 13 concrete in one time according to the specified geometric dimensions, and removing the formwork after the concrete strength is formed;

[0052] S4: Installing the old guardrail columns 11 reinforced by the supporting wall 12: Install the supporting wall internal reinforcements 114 reinforced by the supporting wall 12 in layers according to the specified number and longitudinal and transverse spacing, the supporting wall internal reinforcements 114 are located inside the supporting wall 12 and the bottom of the supporting wall internal reinforcements 114 is embedded in the wall of the retaining wall 2, and stirrups are set for the installed old guardrail columns 11 according to the requirements of S2 and necessary extension or shortening is performed;

[0053] S5: pouring concrete for the supporting wall 12: setting up concrete formwork for the supporting wall 12 in layers, pouring and forming concrete for the supporting wall 12 in layers according to the specified geometric dimensions, and removing the formwork after the concrete strength is formed;

[0054] S6: Leveling the site: dismantle the construction facilities, backfill the soil around the foundation 13, and compact it to make it level.

[0055] Although the present invention has been disclosed as above with preferred embodiments, it is not intended to limit the present invention. Any technician familiar with the art can make many possible changes and modifications to the technical solution of the present invention by using the technical content disclosed above without departing from the scope of the technical solution of the present invention, or modify it into an equivalent embodiment of equivalent changes. Therefore, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present invention without departing from the content of the technical solution of the present invention should fall within the scope of protection of the technical solution of the present invention.

Claims

1. A wall support structure based on waste guardrail columns, characterized in that: The supporting wall structure (1) is arranged closely to the outer side of the retaining wall (2) at intervals in the horizontal direction and fixed on the foundation (3); the supporting wall structure (1) comprises a supporting wall (12), a foundation (13) and a plurality of waste guardrail columns (11); the foundation (13) is connected to the supporting wall (12) and buried in the foundation (3); the foundation (13), the supporting wall (12) and the foundation (3) are all buried with waste guardrail columns (11) arranged at intervals in the horizontal direction and erected; the waste guardrail columns (11) are used to reinforce the supporting wall structure (1) and the foundation (3); The waste guardrail post (11) comprises a foundation-foundation reinforcement (111), wherein the foundation-foundation reinforcement (111) extends from the foundation (13) into the foundation (3); The waste guardrail column (11) comprises a foundation-base-support wall reinforcement (112), wherein the foundation-base-support wall reinforcement (112) extends from the support wall (12) through the foundation (13) to the foundation (3); The waste guardrail column (11) comprises a foundation-support wall reinforcement (113), wherein the foundation-support wall reinforcement (113) extends from the support wall (12) to the foundation (13); The waste guardrail post (11) comprises a support wall internal reinforcement (114), and the support wall internal reinforcement (114) is buried in the support wall (12); The length direction of the retaining wall (2) is the y direction, the width of the supporting wall (12) along the y direction is W1, and the width of the foundation (13) along the y direction is W2, wherein W1<W2; Taking the width direction of the retaining wall (2) as the x-direction, the length of the top of the support wall (12) along the x-direction is L1, and the length of the bottom of the support wall (12) along the x-direction is L2, wherein L1<L2.

2. The wall support structure according to claim 1, characterized in that: Taking the height direction of the retaining wall (2) as the z direction, the height of the top surface of the supporting wall (12) relative to the top surface of the foundation (13) along the z direction is H1, and the height of the top surface of the retaining wall (2) relative to the top surface of the foundation (13) along the z direction is H2, wherein H1≤H2.

3. A construction method of a wall support structure based on waste guardrail columns according to claim 1 or 2, characterized in that: The following steps are involved: S1, determining the position of the supporting wall structure (1) and excavating a foundation pit; S2, preliminarily dividing the waste guardrail posts (11) into three groups, driving the lower sections of the first group of waste guardrail posts (11) into the foundation (3) according to preset requirements, and fixing the lower sections of the second group of waste guardrail posts (11) at the location of the foundation (13); S3, pouring foundation (13) concrete, and removing the formwork after the concrete strength is formed; S4, arranging the third group of waste guardrail posts (11) at the location of the supporting wall (12) according to preset requirements; S5, pouring concrete for the supporting wall (12) in layers, and removing the formwork after the concrete strength is formed; S6. Level the site.

4. The construction method according to claim 3, characterized in that: In the steps S2 and S4, the waste guardrail posts (11) are extended or shortened according to actual needs, and the extension points of adjacent waste guardrail posts (11) are staggered in the vertical direction.

Images