CN220117273U - Prefabricated assembled prestressing force retaining wall - Google Patents
Prefabricated assembled prestressing force retaining wall Download PDFInfo
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- CN220117273U CN220117273U CN202321449265.0U CN202321449265U CN220117273U CN 220117273 U CN220117273 U CN 220117273U CN 202321449265 U CN202321449265 U CN 202321449265U CN 220117273 U CN220117273 U CN 220117273U
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- retaining wall
- vertical
- precast block
- holes
- prestressed
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- 238000004873 anchoring Methods 0.000 claims abstract description 20
- 210000002435 tendon Anatomy 0.000 claims abstract description 13
- 239000004570 mortar (masonry) Substances 0.000 claims abstract description 6
- 238000000034 method Methods 0.000 abstract description 3
- 238000010276 construction Methods 0.000 description 10
- 238000010008 shearing Methods 0.000 description 6
- 238000011065 in-situ storage Methods 0.000 description 3
- 238000009434 installation Methods 0.000 description 3
- 239000002689 soil Substances 0.000 description 3
- 238000005266 casting Methods 0.000 description 2
- 230000002787 reinforcement Effects 0.000 description 2
- 239000004575 stone Substances 0.000 description 2
- 229910001294 Reinforcing steel Inorganic materials 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 239000011083 cement mortar Substances 0.000 description 1
- 230000007547 defect Effects 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 a prefabricated assembly type prestress retaining wall, which comprises a retaining wall foundation and a plurality of layers of concrete precast blocks arranged on the retaining wall foundation; the retaining wall foundation is of a cast-in-place concrete structure, and two rows of vertical prestress positioning holes are formed in the top surface of the retaining wall foundation; two rows of vertical prestress through holes are arranged on each precast block; the vertical prestress through holes on each layer of precast blocks are communicated with the vertical prestress positioning holes on the retaining wall foundation and are penetrated with vertical prestress ribs, anchoring mortar is poured into gaps among the vertical prestress positioning holes and the vertical prestress through holes, and an anchorage device is arranged at the upper end of each vertical prestress rib on the top surface of the uppermost layer of precast block. The cast-in-place concrete pouring amount is small, and the working procedure is simple; the precast blocks and the foundation are connected into a whole through the prestressed tendons, so that the stability of the retaining wall can be greatly improved.
Description
Technical Field
The utility model belongs to the technical field of road construction, relates to retaining wall construction of embankments and cutting, and in particular relates to a prefabricated prestressed retaining wall.
Background
The retaining wall is a structure for supporting earth filled in embankment or cut hillside soil and preventing the earth filled or soil from being deformed and unstable. 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.
Patent CN218479203U discloses a modular retaining wall, which is built by a plurality of precast blocks, so that the construction speed can be increased; 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, but the width of the precast block is limited, the cross section of the concrete column in the middle of the precast block is smaller, and therefore the shearing resistance of the retaining wall is improved only to a limited extent, and especially when the height of the retaining wall is higher, the shearing resistance is further reduced along with the increase of the height-width ratio.
Disclosure of Invention
The utility model aims to solve the problems of the existing retaining wall, and provides a prefabricated prestress retaining wall which is capable of reducing the site construction quantity and accelerating the construction progress while guaranteeing the firm and stable structure of the retaining wall.
The technical scheme of the utility model is as follows:
the utility model provides a prefabricated assembled prestressing force retaining wall, includes the retaining wall foundation and fixes the retaining wall body on the retaining wall foundation, the retaining wall body includes a plurality of concrete precast blocks, and a plurality of precast block layering are installed on the retaining wall foundation, its characterized in that: two rows of vertical prestress through holes are arranged on each precast block near two sides; 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 a embankment or a cutting, and two rows of vertical prestressed tendon positioning holes are formed in the top surface of the retaining wall foundation; the vertical prestressed through holes on each layer of precast blocks are vertically communicated with the vertical prestressed rib positioning holes on the retaining wall foundation, vertical prestressed ribs are inserted into the vertical prestressed through holes vertically communicated with each layer of precast blocks, the lower end of each vertical prestressed rib is inserted into the vertical prestressed rib positioning holes on the retaining wall foundation, anchoring mortar is poured into the gaps among the vertical prestressed ribs, the vertical prestressed rib positioning holes and the vertical prestressed through holes, and an anchor is installed at the top surface of the uppermost layer of precast block at the upper end of each vertical prestressed rib.
The utility model combines the advantages of the concrete cast-in-situ retaining wall and the modularized retaining wall, and avoids the defects of the concrete cast-in-situ retaining wall and the modularized retaining wall; the retaining wall foundation is of a cast-in-place concrete structure, the casting quantity is small, large-scale equipment, templates, supports and other auxiliary devices are not needed in a 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 foundation are connected into a whole through the prestressed reinforcement, and the prestressed reinforcement has strong shearing resistance and can greatly increase the stability of the retaining wall.
Drawings
FIG. 1 is a schematic elevational view of the present utility model;
FIG. 2 is a schematic plan view of the present utility model;
FIG. 3 is a schematic side view of one embodiment of the present utility model;
FIG. 4 is a schematic view of a prefabricated block of a retaining wall;
FIG. 5 is a schematic plan view of a retaining wall foundation;
FIG. 6 is a schematic cross-sectional structure of a retaining wall foundation;
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 installation.
Detailed Description
As shown in fig. 1, 2 and 3, the prefabricated prestressed retaining wall comprises a retaining wall foundation 2 and a retaining wall body fixed on the retaining wall foundation, wherein the retaining wall body comprises a plurality of concrete precast blocks 3, and the precast blocks 3 are installed on the retaining wall foundation in a layered manner.
As shown in fig. 4, two rows of vertical prestress through holes 31 are provided near both sides of each prefabricated block 3.
As shown in fig. 1, 5 and 6, the retaining wall foundation 2 is a cast-in-place concrete structure, and is continuously poured along the outer bottom of the embankment or cutting 1, and two rows of vertical prestressed tendon positioning holes 21 are formed in the top surface of the retaining wall foundation 2.
As shown in fig. 1, the vertical prestressed through holes on each layer of precast block 3 are vertically communicated and are communicated with the vertical prestressed rib positioning holes on the retaining wall foundation, the vertical prestressed ribs 4 are inserted into the vertical prestressed rib positioning holes 21 on the retaining wall foundation, the lower end of each vertical prestressed rib 4 is inserted into the vertical prestressed rib positioning holes 21 on the retaining wall foundation, anchoring mortar is poured into the gaps between the vertical prestressed ribs and the vertical prestressed rib positioning holes and between the vertical prestressed rib positioning holes, and an anchor 6 is installed on the top surface of the uppermost layer of precast block at the upper end of each vertical prestressed rib.
As shown in fig. 4, in the embodiment of the present utility model, in order to increase the connection strength between each layer of prefabricated blocks, two transverse prestress through holes 32 may be formed in each prefabricated block 3; as shown in fig. 2, the transverse prestressed through holes 32 on each layer of precast block are mutually communicated and penetrated by transverse prestressed tendons 5, anchoring mortar is poured into the gaps between the transverse prestressed tendons 5 and the transverse prestressed through holes, and anchors 6 are arranged at two ends of each transverse prestressed tendon.
As shown in fig. 4, in the embodiment of the present utility model, in order to reduce the dead weight of the prefabricated blocks, two hollow grooves 33 with rectangular cross sections may be vertically provided in the middle of each prefabricated block 3; the two hollow grooves are symmetrically arranged on two sides of the transverse center line (dotted line in fig. 4) 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. 5 and 6, in the concrete implementation of the present utility model, for the prefabricated block provided with the hollow grooves, in order to increase the connection strength between the retaining wall body and the retaining wall foundation, two or more vertical anchoring ribs 22 may be respectively provided on each hollow groove of the retaining wall foundation 2, the top surface of which is opposite to the lowest prefabricated block, and the vertical anchoring ribs 22 may be provided in the anchoring concrete 7 by casting the anchoring concrete 7 in the hollow groove on the lowest prefabricated block.
As shown in fig. 1, for a prefabricated section provided with hollow grooves, in order to increase the section modulus of the prefabricated section, one hollow groove on each upper prefabricated section may be opposed to one hollow groove on one lower prefabricated section, and the sheet type concrete 8 may be filled in the hollow grooves of the prefabricated sections opposed up and down.
As shown in fig. 3, in order to increase the appearance and aesthetic property of the wall, the upper and lower precast blocks 3 may be disposed with a staggered joint, and the transverse center line of each precast block 3 on the upper layer is opposite to the joint between two adjacent precast blocks 3 on the lower layer. As shown in fig. 4, in order to ensure that the vertical pre-stressing through holes on the upper and lower precast blocks are vertically penetrated, each row of vertical pre-stressing through holes on each precast block can be set to be 4 vertical pre-stressing through holes 31,4 pre-stressing through holes are symmetrically arranged on two sides of the transverse center line of the precast block, two pre-stressing through holes are arranged on each side, and in the two vertical pre-stressing through holes on each side of the transverse center line of the precast block, one vertical pre-stressing through hole is equal to the other vertical pre-stressing through hole on the end of the precast block.
The construction method of the utility model comprises the following steps:
(1) Pouring a concrete foundation: as shown in fig. 1, a retaining wall foundation 2 is cast by digging a trench along the outside bottom of the roadbed or cutting 1. As shown in fig. 5 and 6, vertical prestressing tendon positioning holes 21 are formed in the top surface of a retaining wall foundation during pouring; the prefabricated block provided with the hollow groove is embedded with the anchoring ribs 22 at the position of the top surface of the foundation, which is opposite to the hollow groove.
(2) 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. Aligning each vertical prestress through hole 31 on each precast block 3 with a corresponding vertical prestress rib positioning hole 21 on a foundation, and ensuring that the transverse prestress through holes on the left and right adjacent precast blocks are penetrated under the condition that the precast blocks are provided with the transverse prestress through holes 32; in the case that the precast block is provided with a hollow groove, the anchoring ribs 22 on the concrete foundation are inserted into the hollow groove 33 on the precast block, the anchoring concrete 7 is poured into the hollow groove, and the anchoring ribs 22 are completely poured into the anchoring concrete 7;
the transverse prestressed tendons 5 are penetrated into the transverse prestressed through holes 32 of each layer of precast block and stretched, and the anchors 6 are arranged at the two ends of the transverse prestressed tendons to connect the same layer of precast block into a whole.
(3) Installing the following precast blocks: as shown in fig. 8, the following precast blocks of each layer are installed in turn according to the design height of the retaining wall, the upper precast block 3 and the lower precast block 3 can be arranged in a staggered way during installation, the transverse central line of each precast block is aligned with the joint of the two precast blocks below, and each vertical prestressed through hole is aligned with the vertical prestressed through hole on the precast block below; after all precast blocks are installed in place, inserting vertical prestressed tendons 4 into vertical prestressed through holes which are vertically communicated, and inserting the lower end of each vertical prestressed tendon into a vertical prestressed tendon positioning hole on the basis; and pouring cement mortar into the vertical prestressed rib positioning holes to anchor the lower ends of the vertical prestressed ribs, then installing jacks at the upper ends of the vertical prestressed ribs to stretch, grouting in the vertical prestressed through holes after stretching is completed, and installing anchors 6 at the upper ends of the vertical prestressed ribs.
In order to increase the section modulus of the retaining wall, a hollow groove of the precast block which is penetrated up and down can be filled with rubble or rubble concrete 8, so that the shearing resistance of the retaining wall is further increased.
Claims (7)
1. The utility model provides a prefabricated assembled prestressing force retaining wall, includes the retaining wall foundation and fixes the retaining wall body on the retaining wall foundation, the retaining wall body includes a plurality of concrete precast blocks, and a plurality of precast block layering are installed on the retaining wall foundation, its characterized in that: two rows of vertical prestress through holes are arranged on each precast block near two sides; the retaining wall foundation is of a cast-in-place concrete structure, the retaining wall foundation is continuously cast along the bottom of the outer side of a embankment or a cutting slope, and two rows of vertical prestressed tendon positioning holes are formed in the top surface of the retaining wall foundation; the vertical prestressed through holes on each layer of precast blocks are vertically communicated with the vertical prestressed rib positioning holes on the retaining wall foundation, vertical prestressed ribs are inserted into the vertical prestressed through holes vertically communicated with each layer of precast blocks, the lower end of each vertical prestressed rib is inserted into the vertical prestressed rib positioning holes on the retaining wall foundation, anchoring mortar is poured into the gaps among the vertical prestressed ribs, the vertical prestressed rib positioning holes and the vertical prestressed through holes, and an anchor is installed at the top surface of the uppermost layer of precast block at the upper end of each vertical prestressed rib.
2. The prefabricated, prestressed retaining wall of claim 1, wherein: two transverse prestress through holes are formed in each precast block; the transverse prestress through holes on each layer of precast block are mutually communicated and penetrated with transverse prestress ribs, anchoring mortar is poured into gaps between the transverse prestress ribs and the transverse prestress through holes, and anchoring devices are arranged at two ends of each transverse prestress rib.
3. The prefabricated, prestressed 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. A prefabricated, prestressed retaining wall according to claim 3, wherein: 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 prefabricated, prestressed retaining wall of claim 4, wherein: a hollow groove on each upper precast block is opposite to a hollow groove on one lower precast block, and the hollow grooves of the precast blocks which are opposite up and down are filled with sheet type concrete.
6. The prefabricated, prestressed retaining wall of claim 1, wherein: each row of vertical prestress through holes on each precast block comprises 4 vertical prestress through holes, the 4 vertical prestress through holes are symmetrically arranged on two sides of the transverse center line of the precast block, and in the two vertical prestress through holes on each side of the transverse center line of the precast block, the distance between one vertical prestress through hole and the transverse center line of the precast block is equal to the distance between the other vertical prestress through hole and the end part of the precast block.
7. The prefabricated, prestressed retaining wall of claim 6, 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 |
|---|---|---|---|
| CN202321449265.0U CN220117273U (en) | 2023-06-08 | 2023-06-08 | Prefabricated assembled prestressing force retaining wall |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321449265.0U CN220117273U (en) | 2023-06-08 | 2023-06-08 | Prefabricated assembled prestressing force retaining wall |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220117273U true CN220117273U (en) | 2023-12-01 |
Family
ID=88913225
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321449265.0U Active CN220117273U (en) | 2023-06-08 | 2023-06-08 | Prefabricated assembled prestressing force retaining wall |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220117273U (en) |
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2023
- 2023-06-08 CN CN202321449265.0U patent/CN220117273U/en active Active
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