A prefabricated assembled UHPC anchor rib plate retaining wall and its construction method

Abstract

The present invention provides a prefabricated assembled UHPC anchor rib plate retaining wall and a construction method thereof, comprising: a plurality of rib columns arranged at intervals from each other, the rib columns being formed by a plurality of splicing units and a plurality of connecting pieces being spliced ​​from each other; the splicing units comprising a bottom plate, a top plate and a pad group, the bottom plate and the top plate being arranged parallel to each other, the pad group being sandwiched between the bottom plate and the top plate, and having a length less than the length of the bottom plate or the length of the top plate; the pad groups being arranged at intervals, the connecting pieces connecting the adjacent pad groups, and the connecting pieces being sandwiched between the bottom plate and the top plate; a plurality of anchor rods being arranged on the rib columns, the anchor rods being inserted and fixedly arranged in the corresponding excavation slope; wall panels being arranged between adjacent rib columns, the upper surfaces of the two side edges of the wall panels being in contact with the corresponding top plates. The problem of large hoisting equipment being difficult to enter the mountainous area is solved.

Description

Technical Field

[0001] The invention relates to the field of anchor rib plate type retaining walls, and in particular to a prefabricated assembled UHPC anchor rib plate type retaining wall and a construction method thereof. Background Art

[0002] At present, anchor rib plate retaining walls are widely used to support excavated slopes. The structure consists of three parts: rib columns, wall panels, and anchor rods. Rib columns and wall panels are mostly made by pouring reinforced concrete on site, and the construction requires processes such as formwork, tying steel bars, and vibrating concrete. There are many construction processes for on-site pouring, and the construction speed is slow. In addition, tying steel bars, setting up forms, and vibrating all require high-altitude operations, which makes it difficult to ensure the safety of workers and the quality. Rib columns and wall panels also use prefabricated reinforced concrete structures, but the existing prefabricated rib columns are all made as a whole, and the weight is generally about 8-15 tons. The existing prefabricated wall panels weigh about 2-4 tons. For high slopes in mountainous areas, the height is large and the required force arm is long, so large mechanical lifting equipment is required. However, large mechanical lifting equipment is difficult to enter mountainous areas, so the existing anchor rib plate retaining walls are difficult to use in such environments. Summary of the invention

[0003] The present invention provides a prefabricated assembled UHPC anchor rib plate type retaining wall and a construction method thereof, which can effectively solve the above-mentioned problems.

[0004] The present invention is achieved in that:

[0005] A prefabricated assembled UHPC anchor rib plate retaining wall, comprising:

[0006] A plurality of rib columns spaced apart from each other, wherein the rib columns are formed by mutually splicing a plurality of splicing units and a plurality of connecting pieces;

[0007] The splicing unit comprises a bottom plate, a top plate and a cushion block group, wherein the bottom plate and the top plate are arranged parallel to each other, and the cushion block group is sandwiched between the bottom plate and the top plate, and its length is shorter than the length of the bottom plate or the length of the top plate;

[0008] The pad block groups are arranged at intervals, the connecting pieces connect the adjacent pad block groups, and the connecting pieces are clamped between the bottom plate and the top plate; a plurality of anchor rods are arranged on the rib column, and the anchor rods are inserted and fixedly arranged in the corresponding excavation slope;

[0009] Wall panels are arranged between adjacent rib columns, and upper surfaces of both side edges of the wall panels are in contact with the corresponding top panels.

[0010] As a further improvement, the connecting piece is an I-beam or a trough beam.

[0011] As a further improvement, the wall panel is a grooved panel.

[0012] As a further improvement, the bottom surface thickness of the wall panel is 4-8 cm.

[0013] As a further improvement, the base plate, top plate, pad block group, connectors and wall panels are integrally cast using ultra-high performance concrete.

[0014] As a further improvement, the number of cushion blocks in each cushion block group is at least two, and the cushion blocks are stacked longitudinally in sequence.

[0015] As a further improvement, the bottom plate, top plate and cushion block group are all provided with penetrating anchor holes, and the bottom plate, top plate and cushion block group can be sleeved on the anchor rods through the anchor holes.

[0016] A construction method for prefabricated assembled UHPC anchor rib plate retaining wall specifically comprises the following steps:

[0017] S1, prepare the bottom plate, top plate, pad block group, connectors, and wall panels respectively;

[0018] S2, excavating the slope, drilling holes at the corresponding positions of the excavated slope with a drilling machine, installing anchor rods, grouting the anchor rods and implanting the rod bodies;

[0019] S3, carving out installation grooves for placing rib columns at the rib column positions on the slope surface, and leveling with concrete or mortar;

[0020] S4, installing the bottom plate, the pad block group, the connector, and the wall panel; each bottom plate is correspondingly mounted on each anchor rod and is close to the bottom of the installation groove, then the pad block group is respectively mounted on each anchor rod and is close to the bottom plate, then the connector is installed between adjacent pad block groups, and then the wall panel is installed between adjacent rib columns and is close to the slope surface;

[0021] S5, each top plate is correspondingly sleeved on each anchor rod and installed close to the pad block group, and finally the anchor rod is tensioned to compress each component to form an overall force.

[0022] The beneficial effects of the present invention are:

[0023] The present invention provides a prefabricated assembled UHPC anchor rib plate retaining wall and a construction method thereof, wherein a rib column is disassembled into a plurality of splicing units and a plurality of connecting pieces which are spliced ​​together, wherein the splicing units include a bottom plate, a top plate and a pad block group, wherein the pad block groups are arranged at intervals, and the connecting pieces connect the adjacent pad block groups, and the connecting pieces are clamped between the bottom plate and the top plate, and a plurality of anchor rods are arranged on the rib column, and the anchor rods are inserted and fixedly arranged in the corresponding excavated slope; the above structure enables the rib column to be disassembled into a plurality of small parts and then transported to a high slope platform in a mountainous area by a small transporting machine, and then manually assembled, thereby solving the problem that large hoisting equipment is difficult to enter the mountainous area;

[0024] The present invention provides a prefabricated assembled UHPC anchor rib plate retaining wall and a construction method thereof, wherein the connecting piece is an I-beam or a groove beam, the wall panel is a groove panel, and the bottom surface thickness of the wall panel is 4-8 cm, and the bottom plate, top plate, pad block group, connecting piece, and wall panel are all integrally cast and formed by ultra-high performance concrete. By setting the components to structures such as grooves, the volume and weight thereof are minimized, and ultra-high performance concrete is used to make the bottom plate, top plate, pad block group, connecting piece, and wall panel, the volume and weight thereof are further reduced, and the difficulty of carrying and assembling each component is reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0026] Figure 1 It is a schematic diagram of the three-dimensional structure of a prefabricated assembled UHPC anchor rib plate retaining wall provided in an embodiment of the present invention.

[0027] Figure 2 It is an exploded schematic diagram of a splicing unit provided in an embodiment of the present invention.

[0028] Figure 3 It is a three-dimensional schematic diagram of a wall panel provided by an embodiment of the present invention.

[0029] Figure 4 It is a cross-sectional schematic diagram of the overall installation of a prefabricated assembled UHPC anchor rib plate type retaining wall provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0030] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the invention claimed for protection, but merely represents the selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0031] In the description of the present invention, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0032] Reference Figure 1-4 As shown, a prefabricated assembled UHPC anchor rib plate retaining wall comprises:

[0033] A plurality of rib columns 1 are arranged at intervals from each other, and the rib columns 1 are formed by splicing a plurality of splicing units and a plurality of connectors 14; in this embodiment, the rib columns 1 are stiffening ribs, and the size of the stiffening ribs is important to have sufficient thickness and to meet the weld length. For example, the stiffening ribs of the column bottom end plate, the lower side is flush with the column bottom end plate edge, the bevel angle is preferably 45-60°, and the bevel angle should not be sharp and should be 2-3 cm straight to ensure the weld length. The shape is a pentagon with three right angles, and the main right angle is cut off so as not to touch the fillet weld between the column and the column bottom end plate.

[0034] The splicing unit includes a bottom plate 11, a top plate 12 and a cushion block group 13. The bottom plate 11 and the top plate 12 are arranged parallel to each other. The cushion block group 13 is sandwiched between the bottom plate 11 and the top plate 12, and its length is less than the length of the bottom plate 11 or the length of the top plate 12.

[0035] The pad block groups 13 are arranged at intervals, the connecting pieces 14 connect the adjacent pad block groups 13, and the connecting pieces 14 are sandwiched between the bottom plate 11 and the top plate 12; a plurality of anchor rods 3 are arranged on the rib column 1, and the anchor rods 3 are inserted and fixedly arranged in the corresponding excavation slope;

[0036] Wall panels 2 are arranged between adjacent rib columns 1 , and upper surfaces of both side edges of the wall panels 2 abut against the corresponding top panels 12 .

[0037] The above structure enables the disassembled components of the rib column to be transported to a high slope platform in the mountainous area by small handling machinery and then assembled manually, without the need for large lifting machinery and equipment for transportation.

[0038] As a further improvement, the connector 14 is an I-beam or a trough beam. The structure of the I-beam and the trough beam can minimize the weight of the connector while completing its own function, so as to achieve the purpose of convenient transportation and easy manual installation. In this embodiment, the connector is a trough beam, and the number of trough beams is two. In other embodiments, the connector can also be an I-beam or other structures that can play the same role, and the number of trough beams or I-beams or other structures that play the same role can be several.

[0039] As a further improvement, the wall panel 2 is a groove panel. In this embodiment, the wall panel is set as a groove panel with four raised sides and a recessed middle. In other embodiments, the wall panel can also be set as a groove panel with only two raised sides, or other panels that can play a role of retaining soil and supporting ribs, and the height of the two sides of the groove panel that play a supporting role can be adaptively adjusted according to the height from the bottom surface of the top plate to the slope surface.

[0040] As a further improvement, the bottom thickness of the wall panel 2 is 4-8 cm, preferably, the bottom thickness of the wall panel 2 is 6 cm, and in other embodiments, the bottom thickness of the wall panel can also be 4 cm or 8 cm. The structure of the grooved panel can reduce the thickness of the wall panel, so that it can achieve the minimum weight while completing its own function, and achieve the purpose of convenient transportation and manual installation.

[0041] As a further improvement, the bottom plate 11, top plate 12, pad group 13, connector 14, and wall panel 2 are integrally cast using ultra-high performance concrete. Ultra-high performance concrete (UHPC) has high strength and good impact resistance, can reduce the size of structural components, obtain more usable space, and has excellent wear resistance and explosion resistance.

[0042] As a further improvement, the number of pads in each pad block group 13 is at least two, and the pad blocks are stacked longitudinally in sequence. In this embodiment, the number of pads is two, and in other embodiments, the number of pads in the pad block group is a plurality of pads. The number of pads in the pad block group can be set according to the specific conditions of the excavation slope to adjust the required thickness of the rib column.

[0043] As a further improvement, the bottom plate 11, top plate 12, and pad block group 13 are all provided with penetrating anchor holes 4, and the bottom plate 11, top plate 12, and pad block group 13 can be sleeved on the anchor rod 3 through the anchor rod holes 4. The prestress of the anchor rod is tensioned on the top plate, so that the top plate, pad block group, connector and bottom plate are pressed and support the wall panel, forming a composite structure to support the pressure of the slope rock and soil.

[0044] A construction method for prefabricated assembled UHPC anchor rib plate retaining wall specifically comprises the following steps:

[0045] S1, the bottom plate 11, the top plate 12, the pad block group 13, the connecting piece 14, and the wall panel 2 are respectively prepared in a factory using ultra-high performance concrete; the bottom plate 11, the top plate 12, the pad block group 13, the connecting piece 14, and the wall panel 2 are the structures introduced in the above embodiment;

[0046] S2, excavating the slope, drilling installation holes in an array at intervals of 2-4m on the excavated slope by means of drilling machines such as rock drills, and then driving anchor rods 3, the anchor rod 3 being the structure introduced in the above-mentioned embodiment, the installation holes are poured with mortar so that the anchor rod body and the installation hole wall are bonded together, belonging to the category of anchor rods with bonding force as the main anchoring function; in this embodiment, the anchor rod is set as a steel bar, in other embodiments, the anchor rod can be specifically selected to use steel strands or steel bars according to the geological conditions of the excavated slope, or can also be set as a hollow rod body, the anchor rod body adopts a hollow design, and the hole in the rod body is used as a grouting channel to facilitate grouting, compared with a solid rod body, the hollow rod body design can obtain better rigidity and shear strength, the rod body has good centrality, the mortar can wrap the entire rod body, and the corrosion resistance is good, the outer surface of the anchor rod body is a standard large pitch thread structure, the thread structure is convenient for cutting and lengthening the anchor rod, and compared with a smooth rod body, the bonding area between the anchor rod body and the grouting material is increased, thereby improving the anchoring force;

[0047] S3, carving out a mounting groove for placing the rib column 1 at the position of the slope rib column 1, and leveling it with concrete or mortar; the height of the mounting groove must be the same as the thickness of the rib column minus the thickness of the top plate and the thickness of the side of the wall panel, so that the bottom plate can be close to the bottom of the mounting groove and the wall panel can be close to the surface of the slope;

[0048] S4, using a winch or other small machine or manual labor to move the prefabricated components in the factory to the slope platform, manually install the bottom plate 11, the pad group 13, the connector 14, and the wall panel 2 in sequence, the pads are stacked longitudinally in sequence, and the number of pads is several. The number of pads can be set according to the specific conditions of the excavation slope to adjust the required thickness of the rib column; each bottom plate 11 is correspondingly sleeved on each anchor rod 3 through the anchor rod hole and is close to the bottom of the installation groove, then the pad group 13 is respectively sleeved on each anchor rod 3 and is close to the bottom plate 11, and then the connector 14 is installed between adjacent pad groups 13, and then the wall panel 2 is installed between adjacent rib columns 1 and is close to the slope surface;

[0049] S5, each top plate 12 is correspondingly mounted on each anchor rod 3 through the anchor rod hole and installed close to the pad block group 13, and finally the anchor rod 3 is tensioned to compress the components to form an overall force, thereby supporting the pressure of the slope rock and soil. The anchor rod can decide whether to apply prestress according to needs.

[0050] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A prefabricated assembled UHPC anchor rib plate retaining wall, characterized in that: include: A plurality of rib columns (1) arranged at intervals from each other, wherein the rib columns (1) are formed by mutually splicing a plurality of splicing units and a plurality of connecting pieces (14); The splicing unit comprises a bottom plate (11), a top plate (12) and a cushion block group (13); the bottom plate (11) and the top plate (12) are arranged parallel to each other; the cushion block group (13) is sandwiched between the bottom plate (11) and the top plate (12), and its length is shorter than the length of the bottom plate (11) or the length of the top plate (12); The bottom plate (11), the top plate (12), and the cushion block group (13) are all provided with penetrating anchor rod holes (4), and the bottom plate (11), the top plate (12), and the cushion block group (13) can be sleeved onto the anchor rod (3) through the anchor rod holes (4); The pad block groups (13) are arranged at intervals, the connecting pieces (14) connect the adjacent pad block groups (13), and the connecting pieces (14) are clamped between the bottom plate (11) and the top plate (12); a plurality of anchor rods (3) are arranged on the rib column (1), and the anchor rods (3) are inserted and fixedly arranged in the corresponding excavation slope; Wall panels (2) are arranged between adjacent rib columns (1), and upper surfaces of both side edges of the wall panels (2) are in contact with the corresponding top panels (12).

2. A prefabricated assembled UHPC anchor rib plate retaining wall as claimed in claim 1, characterized in that: The connecting piece (14) is an I-beam or a channel beam.

3. The prefabricated assembled UHPC anchor rib plate retaining wall according to claim 1, characterized in that: The wall panel (2) is a grooved panel.

4. A prefabricated assembled UHPC anchor rib plate retaining wall as claimed in claim 3, characterized in that: The bottom surface thickness of the wall panel (2) is 4-8 cm.

5. The prefabricated assembled UHPC anchor rib plate retaining wall according to claim 1, characterized in that: The bottom plate (11), top plate (12), cushion block group (13), connecting piece (14), and wall panel (2) are integrally cast using ultra-high performance concrete.

6. The prefabricated assembled UHPC anchor rib plate retaining wall according to claim 1, characterized in that: The number of cushion blocks in each cushion block group (13) is at least two, and the cushion blocks are stacked longitudinally in sequence.

7. A construction method for a prefabricated assembled UHPC anchor rib plate retaining wall, based on a prefabricated assembled UHPC anchor rib plate retaining wall according to any one of claims 1 to 6, characterized in that: The specific steps include: S1, respectively preparing the bottom plate (11), the top plate (12), the cushion block group (13), the connecting piece (14), and the wall panel (2); S2, excavating the slope, drilling holes at corresponding positions of the excavated slope with a drilling machine, installing anchor rods (3), grouting the anchor rods (3) and implanting the rod bodies; S3, carving out installation grooves for placing the rib columns (1) at the positions of the rib columns (1) on the slope surface, and leveling them with concrete or mortar; S4, installing the base plate (11), the cushion block group (13), the connecting piece (14), and the wall panel (2); Each base plate (11) is correspondingly mounted on each anchor rod (3) and is close to the bottom of the installation groove. Then, a cushion block group (13) is mounted on each anchor rod (3) and is close to the base plate (11). Then, a connecting piece (14) is installed between adjacent cushion block groups (13). Then, the wall panel (2) is installed between adjacent rib columns (1) and is close to the slope surface. S5, each top plate (12) is correspondingly sleeved on each anchor rod (3) and installed close to the pad block group (13), and finally the anchor rod (3) is tensioned to compress each component to form an integral force.

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