Construction method of high prefabricated columns of grid ecological retaining wall and its precise installation

Abstract

The present invention relates to a construction method for high prefabricated columns based on a grid ecological retaining wall and their precise installation. The grid ecological retaining wall comprises a column, a grid baffle and an anchor rod. The column forms an anchor rod hole, the anchor rod is inserted into the anchor rod hole, the column is provided with a corbel, the grid baffle is installed on the corbel, and a hanging ring is provided on the top of the column; the bottom of the column is prefabricated with a bottom prefabricated part, the bottom prefabricated part comprises a bottom positioning part, a bottom leveling part, a bottom concrete cushion layer, a bottom seat slurry layer and a bottom temporary positioning part, the top of the column is prefabricated with a top prefabricated part, the top prefabricated part comprises a top temporary fixing part, a top filling concrete and a top connecting part, and the column is precisely installed through the bottom prefabricated part and the top prefabricated part. The column has an ingenious structure and high construction quality, and can effectively ensure the installation effect of the high column based on the grid ecological retaining wall. The above construction method can also effectively improve construction efficiency, reduce safety risks, and ensure construction quality.

Description

Technical Field

[0001] The invention relates to the technical field of assembly construction of roadbed structures, and in particular to a construction method based on high prefabricated columns of a grid ecological retaining wall and precise installation thereof. Background Art

[0002] In the construction of expressways, in order to save land and promote ecological protection, grid ecological retaining walls are often used in sections with good excavation slope geology in roadbed projects. They are composed of columns and grid baffles. The baffles are backfilled with cultivated soil, which can play the role of slope protection and landscaping. It is a good roadbed protection measure. Its construction method is generally to excavate the slope first, then cast the columns, then drive the anchor rods and anchor them, then install the baffles, and finally backfill the cultivated soil. Usually, the construction method of grid columns is cast-in-place, that is, after the slope excavation is completed, the bracket is set up in situ to tie the steel bars (the steel bars can also be tied horizontally off-site, and the whole hoisted and flipped to vertical installation, but the steel bars are easily deformed and damaged during the flipping process, and it is difficult to fix them after vertical installation, which will cause dumping), install the template, and then pour the concrete to complete the column construction. Currently, the height of grille columns can reach up to 11 meters. This construction method has many disadvantages for the construction of higher columns, such as the need to set up scaffolding for high-altitude operations, tie steel bars, install and remove formwork, which is very dangerous and time-consuming, resulting in the slope being exposed for a long time, and there are risks of landslides, collapses, and falling stones. At the same time, high-altitude operations are not conducive to the quality control of the construction accuracy of the columns, and will lead to mismatched baffle installation. Summary of the invention

[0003] In order to overcome the defects in the above-mentioned prior art, the first invention purpose of the present invention is to provide a high prefabricated column based on a grille ecological retaining wall. The column has an ingenious structure and high construction quality, which can effectively ensure the installation effect of the high column based on the grille ecological retaining wall, and is conducive to the promotion and application of the column in the field of assembled construction technology of roadbed structures. The second invention purpose of the present invention is to provide a construction method for the precise installation of high prefabricated columns based on a grille ecological retaining wall. The construction method is used to install the above-mentioned high columns based on the grille ecological retaining wall, which can effectively improve construction efficiency, reduce safety risks, and ensure construction quality. It is also conducive to the promotion and application of the above-mentioned high columns based on the grille ecological retaining wall in the field of assembled construction technology of roadbed structures.

[0004] The above-mentioned construction method for precise installation of high prefabricated columns based on grid ecological retaining wall and high prefabricated columns based on grid ecological retaining wall are technically related to each other and belong to the same inventive concept.

[0005] In order to achieve the above-mentioned first invention purpose, the present invention adopts the following technical scheme: based on the high prefabricated columns of the grille ecological retaining wall, the grille ecological retaining wall includes columns, grille baffles and anchor rods, the columns form anchor rod holes, the anchor rods are inserted into the anchor rod holes, the columns are provided with corbels, the grille baffles are installed on the corbels, and the tops of the columns are provided with hanging rings; the bottom of the columns are prefabricated with bottom prefabricated parts, the bottom prefabricated parts include bottom positioning parts, bottom leveling parts, bottom concrete cushion layers, bottom slurry layers and bottom temporary positioning parts, the top of the columns are prefabricated with top prefabricated parts, the top prefabricated parts include top temporary fixing parts, top filling concrete and top connecting parts, and the columns are precisely installed through the bottom prefabricated parts and the top prefabricated parts.

[0006] As a preferred solution of the present invention, the columns are prefabricated horizontally and provided with a prefabricated pedestal, and the columns are placed on the prefabricated pedestal.

[0007] As a preferred solution of the present invention, the column and the corbel are integrally formed.

[0008] As a preferred solution of the present invention, the lifting ring is made of steel.

[0009] As a preferred solution of the present invention, the column and the hanging ring are integrally formed.

[0010] As a preferred solution of the present invention, the bottom positioning member is a positioning steel bar.

[0011] As a preferred solution of the present invention, the bottom leveling member is a leveling steel plate.

[0012] As a preferred solution of the present invention, the bottom temporary positioning member and the top temporary fixing member are both temporary positioning anchor rods.

[0013] As a preferred solution of the present invention, the top connecting member is a top connecting steel bar.

[0014] In order to achieve the above-mentioned second invention purpose, the present invention adopts the following technical scheme: a construction method based on the precise installation of high prefabricated columns of grid ecological retaining wall, which is applied to the above-mentioned high prefabricated columns of grid ecological retaining wall; the installation method comprises the following steps: step a, after the excavation of the rock slope is completed, set up the bottom temporary positioning parts and the top temporary fixing parts, and do a good job of temporary spray anchor support, and pour the concrete cushion layer; step b, measure the elevation and the size of the plane position, place two bottom positioning parts and two bottom leveling parts, and measure the bottom temporary positioning parts to determine the verticality of the column; Step c, the bottom where the column is to be installed is slurried to form a slurry layer, the surface of the slurry layer is slightly higher than the bottom leveling piece, the column is adjusted to the surface of the slurry layer by a crane, and the plane and verticality of the column are determined by the bottom positioning piece and the bottom temporary positioning piece; Step d, after meeting the requirements, the lifting ring and the two top temporary fixing pieces are fixed through the top connecting piece, the crane is unhooked, and the formwork is supported to cast the gap between the column and the rock slope body; Step e, the column is installed, the bracket is set up, the permanent anchor rod is driven and anchored; Step f, the grille baffle is installed to complete the installation.

[0015] Compared with the prior art, the construction method of the grid ecological retaining wall high prefabricated columns and their precise installation in the present invention has the following beneficial effects:

[0016] 1. Good construction safety. The columns are prefabricated horizontally in the back field and directly hoisted after arriving at the site. The crane and aerial platform cooperate with the short-term high-altitude operation, which greatly reduces the safety risk;

[0017] 2. The risk of rock slope landslide is low. After the excavation of the rock slope and temporary anchor spraying are completed, the columns can be hoisted immediately, and then the anchors can be installed. It only takes two days to install a single column and install the anchors. According to the conventional construction method, it takes at least 5 days to erect the bracket, tie the steel bars, and install and dismantle the formwork. This greatly shortens the exposure time of the rock slope, which is especially beneficial during construction in the rainy season and greatly reduces the risk of slope landslide and collapse;

[0018] 3. Effectively improve the quality and precision. Factory prefabrication on the ground outside the site is conducive to the construction quality control of steel bars, formwork and concrete; the use of standardized steel formwork is also conducive to ensuring the dimensional accuracy of prefabricated columns and the accuracy of embedded anchor holes;

[0019] 4. The position of the anchor hole is accurate. Since the columns are prefabricated, the anchor holes embedded during prefabrication can be accurately embedded according to the designed angle. After the columns are installed in place, the anchor holes can be used as drilling guides, thus ensuring that the angle and linearity of the anchor meet the design requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is a vertical view of the grid ecological retaining wall in the embodiment;

[0021] Figure 2 is a plan view of the grid ecological retaining wall in the embodiment;

[0022] Figure 3 yes Figure 1 The cross-section of the grid ecological retaining wall at Ⅰ-Ⅰ in the middle;

[0023] Figure 4 yes Figure 1 The cross-section of the grid ecological retaining wall at II-II in the middle;

[0024] Figure 5 is an elevation view of the prefabricated columns in the embodiment;

[0025] Figure 6 It is a cross-sectional view of the prefabricated column in the embodiment;

[0026] Figures 7 to 9 This is a schematic diagram of the action of turning and lifting the column in the embodiment;

[0027] Fig.10 This is a schematic diagram of the bottom positioning of the column when it is installed in the embodiment;

[0028] Fig.11 This is a schematic diagram of the top positioning of the column when it is installed in the embodiment;

[0029] Fig.12 It is a schematic diagram of positioning measures at the designed position of the column before the column is installed in place in the embodiment;

[0030] Figures 13 to 17 It is a flow chart of column installation and positioning in the embodiment.

[0031] Figure numerals: 1. column; 1-1. corbel; 1-2. anchor hole; 2. grille baffle; 3. cultivating soil; 4. anchor; 5. temporary sprayed anchor support; 6. top filling concrete; 7. prefabricated pedestal; 8. lifting ring; 9. bottom positioning piece; 10. bottom leveling piece; 11. bottom temporary positioning piece; 12. concrete cushion layer; 13. top temporary fixing piece; 14. top connecting piece; 15. seat slurry layer. DETAILED DESCRIPTION

[0032] The embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0033] Example: Figures 1 to 17As shown, a high prefabricated column based on a grille ecological retaining wall, wherein the grille ecological retaining wall includes a column 1, a grille baffle 2 and an anchor rod 4. In order to facilitate the installation of the anchor rod 4 and ensure the structural stability of the anchor rod 4 during the installation process, and further ensure the application effect of the grille ecological retaining wall, an anchor rod hole 1-2 is formed in the above-mentioned column 1. There are multiple anchor rod holes 1-2, and the multiple anchor rod holes 1-2 are arranged parallel to each other. The anchor rod 4 is inserted into the anchor rod hole 1-2, and the anchor rod hole 1-2 is arranged at an angle to the upper plane or the lower plane of the column 1, so as to further ensure the stabilizing effect of the anchor rod 4.

[0034] In order to further facilitate the installation of the grille baffle 2 and ensure the stability of the grille baffle 2, a corbel 1-1 is provided on the column 1, and the column 1 and the corbel 1-1 are integrally formed. The grille baffle 2 is installed on the corbel 1-1. In order to facilitate the hoisting and installation of the prefabricated column 1, a lifting ring 8 is provided on the top of the column 1 for hoisting and temporary fixing of the column 1. In order to ensure the structural strength of the lifting ring 8 and reduce the probability of fracture at the connection between the lifting ring 8 and the column 1, the lifting ring 8 is made of steel material and is integrally formed with the column 1.

[0035] In order to facilitate the horizontal prefabrication of the column 1, a prefabrication site for the column 1 is selected outside the construction site, a prefabricated pedestal 7 is preset first, the column 1 is prefabricated horizontally with the exposed surface facing downward, the column 1 is placed on the above-mentioned prefabricated pedestal 7, and the column body of the column 1 and the corbel 1-1 are prefabricated together at the same time, which is convenient for construction personnel to operate, reduces the difficulty of operation, avoids high-altitude operations, and ensures safety during the construction process.

[0036] The column 1 is transported because it is prefabricated horizontally and needs to be turned vertically during transportation and installation, which can be accomplished using a conventional crane.

[0037] During the prefabrication of the column 1, a bottom prefabricated part is first prefabricated at the bottom of the column 1, and the above-mentioned bottom prefabricated part includes a bottom positioning part 9, a bottom leveling part 10, a bottom concrete cushion layer 12, a bottom mortar layer 15 and a bottom temporary positioning part 11. The above-mentioned bottom positioning part 9 is a positioning steel bar with a simple structure, convenient use and low use cost. The above-mentioned bottom leveling part 10 is a leveling steel plate with a simple structure and convenient operation. The above-mentioned bottom temporary positioning part 11 is a temporary positioning anchor rod with excellent use performance; a top prefabricated part is prefabricated at the top of the column 1. The above-mentioned top prefabricated part includes a top temporary fixing part 13, a top filling concrete 6 and a top connecting part 14. The above-mentioned top temporary fixing part 13 is a temporary positioning anchor rod, and the above-mentioned top connecting part 14 is a top connecting steel bar. The above-mentioned column 1 is accurately installed through the above-mentioned bottom prefabricated part and the above-mentioned top prefabricated part.

[0038] The construction method for precise installation of high prefabricated columns based on grid ecological retaining walls is applied to the high prefabricated columns based on grid ecological retaining walls described above; the above installation method comprises the following steps:

[0039] Step a: After the excavation of the rock slope is completed, a temporary bottom positioning member 11 and a temporary top fixing member 13 are set up, and temporary spray anchor support 5 is done, and a concrete cushion layer 12 is poured;

[0040] Step b, measuring the elevation and the dimensions of the plane position, placing two bottom positioning pieces 9 and two bottom leveling pieces 10, and measuring the bottom temporary positioning piece 11 to determine the verticality of the above-mentioned column 1;

[0041] Step c, the bottom where the column 1 is to be installed is slurried to form a slurry layer 15, the surface of the slurry layer 15 is slightly higher than the bottom leveling piece 10, the column 1 is adjusted to the surface of the slurry layer 15 by a crane, and the plane and verticality of the column 1 are determined by the bottom positioning piece 9 and the bottom temporary positioning piece 11;

[0042] Step d: After meeting the requirements, the lifting ring 8 is fixed to the two top temporary fixings 13 through the top connecting piece 14, the crane is unhooked, and the formwork is supported to cast the gap between the column 1 and the rock slope body;

[0043] Step e: After the column 1 is installed, a bracket is set up to install a permanent anchor rod 4 and anchor it, and concrete 6 is filled on the top of the column 1;

[0044] Step f, installing the grille baffle 2, and then cultivating the soil 3 on the grille baffle 2 to complete the installation.

[0045] The construction method based on the high prefabricated columns of the grid ecological retaining wall and the precise installation thereof in this embodiment has the following advantages:

[0046] 1. Good construction safety. The columns are prefabricated horizontally in the back field and directly hoisted after arriving at the site. The crane and aerial platform cooperate with the short-term high-altitude operation, which greatly reduces the safety risk;

[0047] 2. The risk of rock slope landslide is low. After the excavation of the rock slope and temporary anchor spraying are completed, the columns can be hoisted immediately, and then the anchors can be installed. It only takes two days to install a single column and install the anchors. According to the conventional construction method, it takes at least 5 days to erect the bracket, tie the steel bars, and install and dismantle the formwork. This greatly shortens the exposure time of the rock slope, which is especially beneficial during construction in the rainy season and greatly reduces the risk of slope landslide and collapse;

[0048] 3. Effectively improve the quality and precision. Factory prefabrication on the ground outside the site is conducive to the construction quality control of steel bars, formwork and concrete; the use of standardized steel formwork is also conducive to ensuring the dimensional accuracy of prefabricated columns and the accuracy of embedded anchor holes;

[0049] 4. The position of the anchor hole is accurate. Since the columns are prefabricated, the anchor holes embedded during prefabrication can be accurately embedded according to the designed angle. After the columns are installed in place, the anchor holes can be used as drilling guides, thus ensuring that the angle and linearity of the anchor meet the design requirements.

[0050] The above description of the disclosed embodiments enables one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention; therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

[0051] Although the following terms are used more frequently in this article: 1, column; 1-1, corbel; 1-2, anchor hole; 2, grille baffle; 3, cultivated soil; 4, anchor; 5, temporary spray anchor support; 6, top filling concrete; 7, prefabricated pedestal; 8, lifting ring; 9, bottom positioning piece; 10, bottom leveling piece; 11, bottom temporary positioning piece; 12, concrete cushion; 13, top temporary fixing piece; 14, top connecting piece; 15, seat slurry layer, etc., the possibility of using other terms is not excluded. These terms are used only to more conveniently describe and explain the essence of the present invention; interpreting them as any additional restrictions is contrary to the spirit of the present invention.

Claims

1. Based on the grid ecological retaining wall high prefabricated column, it is characterized by: The grid ecological retaining wall comprises a horizontal prefabricated column (1), a grid baffle (2) and an anchor rod (4); the column (1) is provided with a prefabricated pedestal (7), the column (1) is placed on the prefabricated pedestal (7), the column (1) forms an anchor rod hole (1-2), the anchor rod (4) is inserted into the anchor rod hole (1-2), the column (1) is provided with a corbel (1-1), the grid baffle (2) is installed on the corbel (1-1), and the top of the column (1) is provided with a hanging ring (8); the bottom of the column (1) is prefabricated with a bottom prefabricated part, and the bottom prefabricated part comprises a bottom positioning part (9), a bottom leveling part (1-1), and a bottom positioning part (1-2). 0), a bottom concrete cushion layer (12), a bottom mortar layer (15) and a bottom temporary positioning piece (11), the bottom positioning piece (9) is a positioning steel bar, and the bottom leveling piece (10) is a leveling steel plate; the top of the column (1) is prefabricated with a top prefabricated piece, the top prefabricated piece includes a top temporary fixing piece (13), top filling concrete (6) and a top connecting piece (14), the bottom temporary positioning piece (11) and the top temporary fixing piece (13) are both temporary positioning anchor rods, the top connecting piece (14) is a top connecting steel bar, and the column (1) is accurately installed through the bottom prefabricated piece and the top prefabricated piece.

2. The high prefabricated column based on the grid ecological retaining wall according to claim 1 is characterized by: The upright column (1) and the corbel (1-1) are integrally formed.

3. The high prefabricated column based on the grid ecological retaining wall according to claim 2 is characterized by: The lifting ring (8) is made of steel material.

4. The high prefabricated column based on the grid ecological retaining wall according to claim 3 is characterized by: The upright column (1) and the hanging ring (8) are integrally formed.

5. A construction method for precise installation of high prefabricated columns based on grid ecological retaining walls, applied to high prefabricated columns based on grid ecological retaining walls as described in any one of claims 1 to 4 above; characterized in that: The installation method comprises the following steps: step a, after the rock slope is excavated, a bottom temporary positioning piece (11) and a top temporary fixing piece (13) are set up, and temporary spray anchor support (5) is provided, and a concrete cushion layer (12) is poured; step b, the elevation and the dimensions of the plane position are measured, two bottom positioning pieces (9) and two bottom leveling pieces (10) are placed, and the bottom temporary positioning piece (11) is measured to determine the verticality of the column (1); step c, the bottom of the column (1) to be installed is slurried to form a slurry layer (15), and the surface of the slurry layer (15) is slightly higher than the bottom leveling piece (10). ), use a crane to adjust the column (1) to the surface of the base slurry layer (15), and determine the plane and verticality of the column (1) by the bottom positioning piece (9) and the bottom temporary positioning piece (11); step d, after meeting the requirements, fix the lifting ring (8) and the two top temporary fixing pieces (13) through the top connecting piece (14), unhook the crane, and support the formwork to cast the gap between the column (1) and the rock slope body; step e, after the column (1) is installed, set up a bracket to drive and anchor the permanent anchor rod (4); step f, install the grille baffle (2), and then cultivate the soil (3) on the grille baffle (2) to complete the installation.

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