CN220117274U - Interior step prestressing force embankment retaining wall - Google Patents
Interior step prestressing force embankment retaining wall Download PDFInfo
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- CN220117274U CN220117274U CN202321449282.4U CN202321449282U CN220117274U CN 220117274 U CN220117274 U CN 220117274U CN 202321449282 U CN202321449282 U CN 202321449282U CN 220117274 U CN220117274 U CN 220117274U
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- retaining wall
- vertical
- precast block
- precast
- embankment
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- 210000002435 tendon Anatomy 0.000 claims abstract description 51
- 238000004873 anchoring Methods 0.000 claims abstract description 41
- 239000004567 concrete Substances 0.000 claims abstract description 34
- 239000004568 cement Substances 0.000 claims description 5
- 239000002002 slurry Substances 0.000 claims description 4
- 239000004575 stone Substances 0.000 claims description 3
- 238000010276 construction Methods 0.000 abstract description 14
- 238000010008 shearing Methods 0.000 abstract description 6
- 239000002689 soil Substances 0.000 description 5
- 238000009434 installation Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 238000011065 in-situ storage Methods 0.000 description 3
- 230000000149 penetrating effect Effects 0.000 description 2
- 229910001294 Reinforcing steel Inorganic materials 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000011178 precast concrete Substances 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
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- Retaining Walls (AREA)
Abstract
The utility model relates to an inner step type prestress road embankment retaining wall, which comprises a retaining wall foundation and a plurality of concrete precast blocks which are installed on the foundation in a layered manner; the retaining wall foundation is a cast-in-place concrete structure, and the top surfaces of the retaining wall foundation are respectively provided with two rows of vertical prestressed tendon anchoring holes; two rows of vertical prestress through holes and one row of vertical prestress rib anchoring holes are formed in each precast block; the outer sides of the precast blocks are flush, and the inner side of each precast block is contracted by a certain width from the inner side of the lower precast block to the outer side of the embankment to form a step facing the embankment; vertical prestressed tendons penetrate through the vertical prestressed through holes of each layer of precast block, the lower ends of the vertical prestressed tendons on the outer side are anchored in the vertical prestressed tendon anchoring holes on the outer side of the concrete foundation, the lower ends of the vertical prestressed tendons on the inner side of each layer of precast block are anchored in the vertical prestressed tendon anchoring holes on the precast block below the vertical prestressed tendons, and an anchor is installed at the upper end of each vertical prestressed tendon. The utility model has the advantages of high construction speed, strong shearing resistance and good stability.
Description
Technical Field
The utility model belongs to the technical field of road construction, relates to retaining wall construction of embankments, and in particular relates to an inner-step prestressed embankment retaining wall.
Background
The embankment is a form of roadbed formed by filling higher than an in-situ line in road construction. In order to reduce the occupied area and the amount of filled soil, the side walls of the embankment are usually in an upright form, and retaining walls are built on two sides to prevent the soil body of the roadbed from sliding downwards. Common embankment retaining walls include stone-laid retaining walls and concrete cast-in-place retaining walls. The blocks of the stone retaining wall are bonded by cement only, so that the stone retaining wall has poor shearing resistance and is easy to collapse when being extruded outwards by soil bodies of roadbed, thus being only suitable for embankments with low heights; the cast-in-situ retaining wall has stable integral structure and strong shear resistance, but needs procedures of binding reinforcing steel bars, supporting templates, erecting scaffolds, pouring concrete and the like during construction, and has large quantity of concrete pouring engineering, slow construction progress and lower work efficiency.
Chinese patent CN218479203U discloses a modular retaining wall, which is built by a plurality of precast blocks, so as to accelerate the construction speed; the vertical pouring holes are formed in the precast blocks, the pouring holes between the upper precast block and the lower precast block are communicated, and concrete is poured in the pouring holes to form reinforcing columns, so that the shearing resistance of the retaining wall is improved. The retaining wall is of a vertical structure and limited by the width of the precast block, and the cross section of a concrete column in the middle of the precast block is smaller, so that the shearing resistance of the retaining wall is limited; especially when the retaining wall is high, the shear resistance is further reduced as the aspect ratio increases.
Disclosure of Invention
The utility model aims to solve the problems of the existing modularized retaining wall, and provides an inner step type prestress road embankment retaining wall, which can reduce the site construction quantity and accelerate the construction progress while ensuring the firmness and stability of the retaining wall structure.
The technical scheme of the utility model is as follows:
the utility model provides an interior step prestressing force embankment retaining wall, includes the retaining wall basis and fixes the retaining wall body on the retaining wall basis, the retaining wall body includes a plurality of concrete precast blocks, and a plurality of precast block layering are installed on the retaining wall basis, its characterized in that:
the retaining wall foundation is of a cast-in-place concrete structure, the retaining wall foundation is continuously poured along the bottom of the outer side of the road embankment, and a row of vertical prestressed tendon anchoring holes are respectively formed in the top surfaces of the inner side and the outer side of the retaining wall foundation;
a row of vertical prestress through holes are respectively arranged on each precast block near the inner side and the outer side, wherein a row of vertical prestress rib anchoring holes are arranged on the inner side of the row of vertical prestress through holes on the inner side;
the inner side of each precast block is installed towards the embankment; the outer sides of the precast blocks in each layer are flush, and the vertical prestress through holes in the outer sides of the precast blocks in each layer are communicated with the vertical prestress anchor holes in the outer sides of the concrete foundation and penetrate through the vertical prestress; the inner side of each layer of precast block is contracted to a certain width from the inner side of the lower layer of precast block to the outer side of the embankment to form a step facing the embankment, and the vertical prestressed through hole of the inner side of each layer of precast block is communicated with the vertical prestressed tendon anchoring hole on the precast block below the vertical prestressed through hole and penetrates through the vertical prestressed tendon, wherein the vertical prestressed through hole of the inner side of the lowest layer of precast block is communicated with the vertical prestressed tendon anchoring hole of the inner side of the concrete foundation and penetrates through the prestressed tendon; the lower ends of the vertical prestressed tendons are anchored in the vertical prestressed tendon anchoring holes through cement slurry, and the upper ends of the vertical prestressed tendons are provided with anchorage devices on the top surfaces of the precast blocks; embankment filling is pressed on each layer of steps.
The utility model combines the advantages of the existing concrete cast-in-situ retaining wall and the modularized retaining wall, and avoids the defects of the two; the retaining wall foundation adopts a cast-in-place concrete structure, the casting quantity is small, large-scale equipment, templates, supports and other auxiliary devices are not needed in the construction site, and the working procedure is relatively simple; the retaining wall body is assembled by adopting the precast blocks, the construction speed is high, the precast blocks and the precast blocks are connected with the foundation into a whole through the prestressed tendons, and the shearing resistance is high; the outside of the retaining wall is an upright structure, the inside of the retaining wall is in a step form, the section of the retaining wall is sequentially increased from top to bottom, the embankment is filled with soil and pressed on each step, and the shearing resistance and stability of the retaining wall can be further improved.
Drawings
FIG. 1 is a schematic elevational view of the present utility model;
FIG. 2 is a schematic plan view of a precast block according to the present utility model;
FIG. 3 is a schematic view of the outside structure of an embodiment of the present utility model;
FIG. 4 is a schematic plan view of a retaining wall foundation;
FIG. 5 is a schematic cross-sectional structure of a retaining wall foundation;
FIG. 6 is a schematic view of a prefabricated block;
fig. 7 is a schematic view showing an installation state of a first precast block of a retaining wall;
fig. 8 is a schematic view of the retaining wall after the installation of each layer of prefabricated blocks.
Detailed Description
As shown in fig. 1, 2 and 3, the retaining wall of the present utility model comprises a retaining wall foundation 2 and a retaining wall body fixed on the retaining wall foundation, the retaining wall body comprising a plurality of precast concrete blocks 3, the precast blocks 3 being installed on the retaining wall foundation 2 in layers;
the retaining wall foundation 2 is of a cast-in-place concrete structure and is continuously poured along the bottom of the outer side 1 of the road embankment; as shown in fig. 4 and 5, the top surfaces of the inner side and the outer side of the retaining wall foundation 2 are respectively provided with a row of vertical prestressed tendon anchoring holes 4;
as shown in fig. 6, a row of vertical prestress through holes 5 are respectively arranged on each precast block 3 near the inner side and the outer side, wherein a row of vertical prestress rib anchoring holes 4 are arranged on the inner side of the row of vertical prestress through holes 5 on the inner side;
the inner side (the side provided with the vertical prestressed tendon anchoring hole 4) of each precast block 3 is installed towards the embankment 1; the outer sides of the precast blocks 3 of each layer are flush, and the vertical prestressed through holes 5 at the outer sides of the precast blocks of each layer are communicated with the vertical prestressed tendon anchoring holes at the outer sides of the concrete foundation and are penetrated with vertical prestressed tendons 6; the inner side of each layer of precast block 3 is contracted to a certain width from the inner side of the lower layer of precast block to the outer side of the embankment to form a step facing the embankment, and the vertical prestressed tendon anchoring holes 5 on the inner side of each layer of precast block are communicated with the vertical prestressed tendon anchoring holes 4 on the precast block below the vertical prestressed tendon anchoring holes and penetrate through the vertical prestressed tendons 6, wherein the vertical prestressed tendon anchoring holes 5 on the inner side of the lowest layer of precast block are communicated with the vertical prestressed tendon anchoring holes 4 on the inner side of the concrete foundation and penetrate through the prestressed tendons 6; the lower ends of the vertical prestressed tendons 6 are anchored in the vertical prestressed tendon anchoring holes 4 through cement slurry, and the upper ends of the vertical prestressed tendons are provided with anchors 7 on the top surface of the precast block; the earth filled in the embankment 1 is pressed against each step.
As shown in fig. 6, in the implementation of the present utility model, in order to increase the connection strength between each layer of prefabricated blocks, two horizontal prestress through holes 8 may be provided on each prefabricated block; the horizontal prestress through holes on each layer of precast block are mutually communicated and penetrated with horizontal prestress ribs 9, and the two ends of each horizontal prestress rib are respectively provided with an anchor 7.
As shown in fig. 6, in order to reduce the dead weight of the prefabricated blocks, two hollow grooves 10 with rectangular cross sections can be vertically arranged in the middle of each prefabricated block in the implementation of the utility model; the two hollow grooves are symmetrically arranged on two sides of the transverse center line of the precast block, and the distance between each hollow groove and the transverse center line of the precast block is equal to the distance between each hollow groove and the end part of the precast block.
As shown in fig. 4 and 5, in the case that the precast block is provided with hollow grooves, two or more vertical anchoring ribs 11 may be respectively provided on each hollow groove of the retaining wall foundation top surface facing the lowest precast block; as shown in fig. 1, the vertical anchor bars are inserted into the hollow grooves on the lowest precast block, the hollow grooves 10 are cast with the anchor concrete 12, and the vertical anchor bars 11 are cast in the anchor concrete 12.
Further, as shown in fig. 1, in the case where the prefabricated blocks are provided with hollow grooves, a sheet-type or slab concrete 13 may be filled in each prefabricated block hollow groove 10.
As shown in fig. 3, in the implementation of the present utility model, in order to improve the aesthetic appearance of the retaining wall, the upper and lower precast blocks 3 may be disposed with staggered joints, and the transverse center line of each precast block on the upper layer is opposite to the joint between two adjacent precast blocks on the lower layer.
The construction method of the utility model comprises the following steps:
(1) Processing a precast block: uniformly processing the precast blocks in a precast yard, and processing precast blocks with various specifications, which are equal in length and different in width, according to the design size of the inner steps of the retaining wall, so as to form the retaining wall steps; as shown in fig. 6, a vertical prestress through hole 5 and a vertical prestress rib anchoring hole 4 are preset on each precast block 3, and a horizontal prestress through hole 8 and a hollow groove 10 can be arranged according to the requirement.
(2) Pouring a concrete foundation: before embankment filling construction, the side lines on two sides of the embankment are lofted, grooves are dug along the side lines of the embankment, and a retaining wall foundation 2 is poured. As shown in fig. 4 and 5, two rows of vertical prestressed tendon anchoring holes 4 are formed in the top surface of the retaining wall foundation 2 during pouring; and pre-burying anchoring ribs 11 at the position of the top surface of the foundation, which is opposite to the hollow grooves, of the precast block provided with the hollow grooves.
(3) Installing a first layer of precast block: as shown in fig. 7, a first layer precast block 3 is installed on a concrete foundation 2.
The inner side (the side provided with the vertical prestress anchoring hole 4) of each precast block 3 faces the embankment; two rows of vertical prestressed through holes 5 on each precast block are respectively aligned with two rows of vertical prestressed tendon anchoring holes 4 on the concrete foundation 2 up and down;
under the condition that the precast blocks are provided with horizontal prestress through holes 8, the horizontal prestress through holes on each precast block are ensured to be communicated at the same time and penetrate into horizontal prestress ribs 9, after the first layer of precast blocks are installed, the horizontal prestress ribs 9 are stretched, and anchors 7 are installed at the two ends of each precast block;
in the case that the precast block is provided with a hollow groove, the vertical anchoring ribs 11 on the concrete foundation 2 are inserted into the hollow groove 10 on the precast block, the anchoring concrete 12 is poured into the hollow groove, and the anchoring ribs 11 are completely poured into the anchoring concrete 12.
(4) Installing the following precast blocks: as shown in fig. 8, a prefabricated block with a proper width is selected as a second layer prefabricated block, so that the outer side of the second layer prefabricated block 3 is flush with the outer side of the first layer prefabricated block, the inner side is retracted to a certain width in the direction outside the embankment, the vertical prestress through holes 5 on the outer side of the second layer prefabricated block are aligned with the vertical prestress through holes 5 on the outer side of the first layer prefabricated block, and the vertical prestress through holes 5 on the inner side of the second layer prefabricated block are aligned with the vertical prestress rib anchoring holes 4 on the first layer prefabricated block; horizontal ribs 9 are arranged in the horizontal prestress through holes 8 of the second layer of precast blocks in a penetrating mode, and are stretched and anchored; the hollow grooves on the second precast block may be filled with sheet-type or sheet-type concrete 13 according to the shear design requirements of the retaining wall. And installing the subsequent precast blocks 3 in sequence according to the installation method of the second precast block layer until the design height of the retaining wall.
Penetrating vertical prestressed tendons 6 into the vertical prestressed through holes of each layer of precast blocks, and inserting the lower end of each vertical prestressed tendon 6 into the vertical prestressed tendon anchoring hole 4 below the vertical prestressed tendons; grouting cement slurry 14 into each vertical prestressed tendon anchoring hole 4 to anchor the lower ends of the vertical prestressed tendons; and then tensioning the upper ends of the vertical prestressed tendons by adopting jacks, wherein the vertical prestressed tendons at the inner side start to be tensioned layer by layer from the precast block at the lowest layer, and the vertical prestressed tendons at the outer side correspond to the layer number of the precast blocks in a grading manner. And after tensioning of each vertical prestressed tendon 6 is completed, an anchor 7 is arranged at the upper end.
When the installation method is specifically implemented, the upper precast block and the lower precast block can be installed in a staggered manner, as shown in fig. 3, and the transverse center line of each precast block 3 on the upper layer is aligned with the seam of two precast blocks on the lower layer.
After the construction of the retaining wall body is completed, the embankment is filled according to the layer number of the retaining wall steps, and the filled soil is compacted on the top surface of each step.
Claims (6)
1. The utility model provides an interior step prestressing force embankment retaining wall, includes the retaining wall basis and fixes the retaining wall body on the retaining wall basis, the retaining wall body includes a plurality of concrete precast blocks, and a plurality of precast block layering are installed on the retaining wall basis, its characterized in that:
the retaining wall foundation is of a cast-in-place concrete structure, the retaining wall foundation is continuously poured along the bottom of the outer side of the road embankment, and a row of vertical prestressed tendon anchoring holes are respectively formed in the top surfaces of the inner side and the outer side of the retaining wall foundation;
a row of vertical prestress through holes are respectively arranged on each precast block near the inner side and the outer side, wherein a row of vertical prestress rib anchoring holes are arranged on the inner side of the row of vertical prestress through holes on the inner side;
the inner side of each precast block is installed towards the embankment; the outer sides of the precast blocks in each layer are flush, and the vertical prestress through holes in the outer sides of the precast blocks in each layer are communicated with the vertical prestress anchor holes in the outer sides of the concrete foundation and penetrate through the vertical prestress; the inner side of each layer of precast block is contracted to a certain width from the inner side of the lower layer of precast block to the outer side of the embankment to form a step facing the embankment, and the vertical prestressed through hole of the inner side of each layer of precast block is communicated with the vertical prestressed tendon anchoring hole on the precast block below the vertical prestressed through hole and penetrates through the vertical prestressed tendon, wherein the vertical prestressed through hole of the inner side of the lowest layer of precast block is communicated with the vertical prestressed tendon anchoring hole of the inner side of the concrete foundation and penetrates through the prestressed tendon; the lower ends of the vertical prestressed tendons are anchored in the vertical prestressed tendon anchoring holes through cement slurry, and the upper ends of the vertical prestressed tendons are provided with anchorage devices on the top surfaces of the precast blocks; embankment filling is pressed on each layer of steps.
2. The inner stepped prestressed embankment retaining wall of claim 1, wherein: two horizontal prestress through holes are arranged on each precast block; the horizontal prestress through holes on each layer of precast block are mutually communicated and penetrated with horizontal prestress ribs, and the two ends of each horizontal prestress rib are respectively provided with an anchor.
3. The inner stepped prestressed embankment retaining wall of claim 1, wherein: two hollow grooves with rectangular cross sections are vertically arranged in the middle of each precast block; the two hollow grooves are symmetrically arranged on two sides of the transverse center line of the precast block, and the distance between each hollow groove and the transverse center line of the precast block is equal to the distance between each hollow groove and the end part of the precast block.
4. An inner stepped prestressed embankment retaining wall according to claim 3, characterized in that: two or more vertical anchoring ribs are respectively arranged on each hollow groove of the lowest precast block opposite to the top surface of the retaining wall foundation, anchoring concrete is poured in the hollow groove on the lowest precast block, and the vertical anchoring ribs are poured in the anchoring concrete.
5. The inner stepped prestressed embankment retaining wall of claim 4, wherein: the hollow groove on each precast block is filled with sheet type or sheet stone concrete.
6. The inner stepped prestressed embankment retaining wall of claim 1, wherein: the staggered joint between the upper layer precast block and the lower layer precast block is arranged, and the transverse central line of each precast block on the upper layer is opposite to the joint between two adjacent precast blocks on the lower layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321449282.4U CN220117274U (en) | 2023-06-08 | 2023-06-08 | Interior step prestressing force embankment retaining wall |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321449282.4U CN220117274U (en) | 2023-06-08 | 2023-06-08 | Interior step prestressing force embankment retaining wall |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220117274U true CN220117274U (en) | 2023-12-01 |
Family
ID=88894528
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321449282.4U Active CN220117274U (en) | 2023-06-08 | 2023-06-08 | Interior step prestressing force embankment retaining wall |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220117274U (en) |
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2023
- 2023-06-08 CN CN202321449282.4U patent/CN220117274U/en active Active
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