CN217027038U - Pile anchor structure capable of adapting to soil filling, consolidation and settlement - Google Patents
Pile anchor structure capable of adapting to soil filling, consolidation and settlement Download PDFInfo
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- CN217027038U CN217027038U CN202220657870.6U CN202220657870U CN217027038U CN 217027038 U CN217027038 U CN 217027038U CN 202220657870 U CN202220657870 U CN 202220657870U CN 217027038 U CN217027038 U CN 217027038U
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- pile
- anchor
- cantilever beam
- anchor cable
- filling
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- 238000007596 consolidation process Methods 0.000 title claims abstract description 16
- 239000002689 soil Substances 0.000 title claims description 44
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 45
- 239000010959 steel Substances 0.000 claims abstract description 45
- 238000004873 anchoring Methods 0.000 claims abstract description 11
- 238000002955 isolation Methods 0.000 claims description 4
- 230000001681 protective effect Effects 0.000 claims description 4
- 238000007789 sealing Methods 0.000 claims description 3
- 239000006185 dispersion Substances 0.000 claims description 2
- 230000000087 stabilizing effect Effects 0.000 claims 2
- 230000007797 corrosion Effects 0.000 claims 1
- 238000005260 corrosion Methods 0.000 claims 1
- 238000005096 rolling process Methods 0.000 abstract description 3
- 238000013461 design Methods 0.000 abstract description 2
- 238000010276 construction Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 239000004568 cement Substances 0.000 description 3
- 239000011083 cement mortar Substances 0.000 description 3
- 238000006073 displacement reaction Methods 0.000 description 3
- 238000004062 sedimentation Methods 0.000 description 3
- 238000010008 shearing Methods 0.000 description 3
- 238000005336 cracking Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000002787 reinforcement Effects 0.000 description 2
- 238000009412 basement excavation Methods 0.000 description 1
- 238000005536 corrosion prevention Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 238000005429 filling process Methods 0.000 description 1
- 239000011440 grout Substances 0.000 description 1
- 229920001903 high density polyethylene Polymers 0.000 description 1
- 239000004700 high-density polyethylene Substances 0.000 description 1
- 238000011065 in-situ storage Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000007569 slipcasting Methods 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
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- Piles And Underground Anchors (AREA)
Abstract
The utility model belongs to the technical field of supporting and retaining structure design in geotechnical engineering, and particularly discloses a pile anchor structure capable of adapting to filling, consolidation and settlement, which comprises an anti-slide pile, wherein two sections of steel-frame cantilever beams extending towards the filling side from the pile top and the ground of the anti-slide pile respectively form an Contraband-shaped steel frame for the pile top cantilever beam and the ground cantilever beam, a vertical prestressed anchor cable penetrates through the pile top cantilever beam and the ground cantilever beam, the upper end of the anchor cable is fixed through an anchoring device, the lower end of the anchor cable is anchored into a stable stratum to form an anchoring section, a steel pipe is sleeved outside the anchor cable, the steel pipe is anchored into the pile top cantilever beam, penetrates through the ground cantilever beam and is anchored into a stable stratum 2-3 m below a sliding surface or a potential sliding surface, through the arrangement of the vertical steel pipe, the direct contact between the free section of the anchor cable and the filling is avoided, the increase of the deformation of the anchor cable caused by rolling is effectively avoided, the actual tension force cannot be increased, effectively ensuring the engineering safety.
Description
Technical Field
The utility model belongs to the technical field of supporting and retaining structure design in geotechnical engineering, and particularly relates to a pile anchor structure capable of adapting to filling, consolidation and settlement.
Background
The pile anchor structure is an important soil retaining structure, is generally formed by connecting anti-slide piles and pre-stressed anchor cables, has good effects of resisting horizontal deformation of the side slope and saving manufacturing cost, and is widely used in side slope engineering. Soil bodies in the excavation side slope are generally solidified completely, the vertical deformation and the horizontal deformation of the soil bodies are small, and the influence on the anchor cable is small; in the filling slope engineering, the consolidation settlement of newly filled soil and the loading effect on foundation soil have great influence on the construction and stress of the anchor cable in the pile anchor structure. In the filling slope engineering, an ordinary anchor cable penetrates through a pile body and is anchored into the soil body, wherein the angle between the anchor cable and the horizontal plane is 15-35 degrees. In the construction process, the inclined free section anchor cable body is easy to deform due to soil filling and rolling in the soil filling process of the back of the backfilled pile, so that the prestress loss is caused; after construction is finished, because the thickness of the covering soil on the free section of the anchor cable is different, differential settlement is easy to generate under the self-weight consolidation action of new filling soil, so that deformation difference at each position of the free section is caused, and prestress loss is caused; the anchoring bodies are generally inclined by 15-35 degrees and anchored into in-situ foundation soil, and overlying filling soil with different thicknesses also generates different additional stress in a foundation, so that the anchoring bodies crack or even break, the anchor cable fails and the structure safety is threatened; meanwhile, the steel strand is exposed in the filling soil due to the cracking of cement mortar, so that the steel strand is corroded, and the service durability of the steel strand is reduced.
SUMMERY OF THE UTILITY MODEL
The utility model mainly aims to research the characteristics of the conventional pile anchor structure and the soil filling effect, solve the problems in the background technology and provide the pile anchor structure capable of adapting to the consolidation settlement of the filled soil.
A pile anchor structure capable of adapting to filling consolidation settlement: the anti-slide pile comprises an anti-slide pile, wherein the pile top and the ground of the anti-slide pile extend to the earth filling side to form two sections of steel frame cantilever beams into Contraband-shaped steel frames for the pile top cantilever beam and the ground cantilever beam respectively, a vertical prestressed anchor cable penetrates through the pile top cantilever beam and the ground cantilever beam and is arranged, the upper end of the anchor cable is fixed through an anchoring device, the lower end of the anchor cable is anchored into a stable stratum to form an anchoring section, a steel pipe is sleeved outside the anchor cable, the steel pipe is anchored into the pile top cantilever beam, penetrates through the ground cantilever beam and is anchored into the stable stratum with 2-3 m below a sliding surface or a potential sliding surface.
The anchor cable driven in vertically is provided based on the characteristics of dead weight consolidation settlement of new filled soil of the filled side slope, and the problems of anchor cable failure and durability loss can be effectively avoided.
The idea is as follows: the method comprises the following steps that firstly, the vertical sedimentation characteristic of filled soil is considered, the horizontal direction shows uneven sedimentation, and the direction of an anchor cable is adjusted to be the vertical direction; secondly, extending a section of cantilever beam from the pile top to the side of the soil filling to serve as a counter-force structure of the anchor cable; thirdly, certain horizontal displacement can be generated in the later-stage sedimentation process of the filled soil, the horizontal soil pressure is increased, and the shear resistance is increased and the horizontal deformation is resisted by arranging steel pipes through anchor cables at the soil filling section; fourthly, extending a section of cantilever beam to the side of the filled soil at the intersection of the pile and the ground, and fixing a steel pipe in the filled soil together with the pile top cantilever beam; fifthly, shearing damage is generated on the natural foundation soil due to the stacking effect of the newly filled side slope, a potential sliding surface can appear, and certain measures are taken to increase the shearing resistance of the anchor cable near the sliding surface so as to resist creep deformation at the position, further reduce the prestress loss and improve the durability.
The working principle of the patent structure of the utility model is as follows: the filling pressure generates horizontal thrust to the pile, and the pile deforms towards the side facing the empty space to cause the upper cantilever beam to rotate upwards. The prestressed anchor cable balances the upward rotation effect of the upper cantilever beam through the pre-applied downward force, so that the horizontal displacement of the pile is reduced; the upper cantilever beam and the lower cantilever beam form restraint on the steel pipe penetrated by the anchor cable so as to resist horizontal deformation near the filling soil and the potential slip surface of the foundation and obstruct the vertical and horizontal actions of the filling soil on the anchor cable.
The utility model has the following advantages:
1. the anchor cable is vertical, and the pile back filling construction is simpler than the conventional pile anchor filling construction;
2. through setting up vertically to the steel pipe, avoided anchor rope free section and filled soil direct contact, effectively avoided rolling and aroused the anchor rope and warp the increase, the actual pulling force of anchor rope can not increase, has effectively guaranteed engineering safety.
3. The anchor cable is vertical at the natural foundation cement mortar wrapping section, and differential settlement can not be generated by overlying and filling for loading, thereby avoiding the cracking of the cement mortar caused by differential settlement of the conventional oblique anchoring section and enhancing the use bearing capacity and the durability of the pile anchor structure.
4. The 'Contraband' shaped steel frame that stake and cantilever beam formed forms the restraint to the steel pipe, has increased the ability of shearing of anchor rope, and the reliability of structure is higher.
Drawings
FIG. 1 is a schematic view of connection between an anti-slide pile and a prestressed anchor cable;
FIG. 2 is a structural diagram of a prestressed anchor cable;
FIG. 3 is a sectional view of the portion A-A of the prestressed anchorage cable;
FIG. 4 is a cross-sectional view of a portion B-B of a prestressed anchorage cable;
FIG. 5 is a cross-sectional view of the C-C portion of the prestressed anchorage cable;
FIG. 6 is a cross-sectional view of a D-D portion of a prestressed anchorage cable;
FIG. 7 is a cross-sectional view of the portion E-E of the prestressed anchorage cable;
FIG. 8 is a diagram illustrating anchoring requirements of the slide-resistant piles and the cantilever steel bars;
in the figure: 1-slide-resistant pile, 2-sealing anchor concrete, 3-anchorage device, 4-pile top cantilever beam, 5-steel pipe, 6-ground cantilever beam, 7-isolation support, 8-steel strand, 9-cement slurry, 10-bearing body, 11-anchor hole, 12-protective sleeve, 13-wire loop, 14-grouting pipe and 15-cantilever beam longitudinal steel bar.
Detailed Description
Embodiments of the present invention will now be described with reference to the accompanying drawings. It will be appreciated by those skilled in the art that the following examples are illustrative of the utility model only and should not be taken as limiting the scope of the utility model. The specific techniques, connections, conditions, or the like, which are not specified in the examples, are performed according to the techniques, connections, conditions, or the like described in the literature in the art or according to the product specification. The materials, instruments or equipment are not indicated by manufacturers, and are conventional products which can be obtained by purchasing.
With reference to fig. 1-8, a pile anchor structure capable of adapting to filling consolidation settlement: including slide-resistant pile 1, slide-resistant pile's pile bolck and ground department extend two sections steelframe cantilever beam to fill the side and extend two sections steelframe cantilever beam and form "Contraband" shape steelframe for pile bolck cantilever beam 4 and ground department cantilever beam 6 respectively, it is provided with vertical prestressed anchorage cable to run through pile bolck cantilever beam 4 and ground department cantilever beam 6, the anchor cable upper end is fixed through anchor device, the lower end anchor forms the anchor section in the stable stratum, anchor cable overcoat steel pipe 5, steel pipe 5 anchor pile bolck cantilever beam 4, pass ground department cantilever beam 6, and anchor 2~3m stable stratum under the slip plane or the latent slip plane, wherein anchor device includes ground tackle 3 and sets up in the anchor sealing concrete 2 at ground tackle top.
A protective sleeve 12 is arranged outside the soil filling section steel pipe 5; anticorrosive material is injected between the steel pipe 5 and the protective sleeve 12, and the steel pipe is internally provided with an isolation bracket 7 in the anchor hole 11 to play the role of isolation and corrosion prevention; the anchor hole 11 is the underground duct that sets up for making the anchor rope fix in the underground, the steel pipe sets up steel strand wires in anchor hole 11 and keeps apart support 7, namely sets up and keeps apart the support between steel pipe 5 and the underground soil layer, preferred setting is near glide plane or potential glide plane, anchor rope steel strand wires are built-in to anchor hole 11, and set up slip casting pipe 14, through stringing ring 13, gather the steel strand wires ring in the anchor hole 11, through anchor rope supporting body 10 (for the finished product, generally make by high density polyethylene or steel strand wires, can purchase by the market) carry out the dispersion of 2, 4, 6 quantity with the steel strand wires quantity, after the setting is accomplished, use grout 9 to anchor rope steel strand wires 8 in the original state foundation soil layer.
After the soil filling and backfilling are finished, tensioning and locking the anchor cable steel strand 8 through the anchorage device 3, forming pressure on the cement paste 9 through the supporting body 10 in the original natural foundation, and balancing the pressure by the bonding force of the soil layer and the cement paste 9; after the filling is finished and the working state is reached, the filling resists the slide pile to form horizontal thrust, the pile-added pile top cantilever steel frame structure is caused to rotate, and after the anchor cable is locked, the end part of the cantilever is pulled down, so that the horizontal displacement of the pile top can be effectively reduced.
Specifically, a concrete construction method of the pile anchor structure capable of adapting to the consolidation settlement of the filled soil comprises the following steps:
1. constructing anti-slide pile holes; and constructing anchor holes in the pile separating holes.
2. Placing a pile reinforcement cage; and (5) placing anchor cables on the separation piles.
3. As shown in fig. 8, the longitudinal steel bars 15 of the pile top cantilever beam and the ground cantilever beam are embedded in advance, and the requirement of 35d anchoring length is met;
4. the upper end of the anchor rope penetrates through the cantilever beam reinforcement cage, the outer steel pipe 5 of the anchor rope penetrates through the soil filling section to reach a stable stratum 2-3 m below the potential sliding surface, and the steel pipe 5 penetrating through the soil filling section penetrates through a protective sleeve;
5. pouring concrete on the anti-slide pile and the cantilever beam; and (5) grouting the anchor cable.
6. And filling soil on the back side of the pile to the pile top, and tensioning the anchor cable to a locking value.
7. Further filling soil to the filling side slope for forming.
The above embodiments are only for illustrating the technical idea and features of the present invention, and the purpose of the present invention is to enable those skilled in the art to understand the content of the present invention and implement the present invention, and not to limit the protection scope of the present invention by this means. All equivalent changes and modifications made according to the spirit of the present invention should be covered within the protection scope of the present invention.
Claims (6)
1. The utility model provides a pile anchor structure that can adapt to fill out soil consolidation and subside, its characterized in that includes slide-resistant pile, slide-resistant pile's pile bolck and ground department extend to fill out soil side and extend two sections steelframe cantilever beams and form "Contraband" shape steelframe for pile bolck cantilever beam and ground department cantilever beam respectively, run through pile bolck cantilever beam and ground department cantilever beam and be provided with vertical prestressed anchorage cable, the anchor cable upper end is fixed through anchor device, and the lower end anchors forms the anchor section in stabilizing the stratum, anchor cable overcoat steel pipe, the steel pipe anchors into the pile bolck cantilever beam, passes ground department cantilever beam to anchor in 2~3m stabilizing the stratum under glide plane or the potential glide plane.
2. The pile anchor structure capable of adapting to the consolidation settlement of the filled soil according to claim 1, wherein the steel pipe is exposed to the inner part of the filled soil and is externally sheathed with a corrosion-resistant protective sleeve.
3. The pile anchor structure capable of adapting to filling, consolidation and settlement of claim 1, wherein the anchor cable is a pressure dispersion type anchor cable, and the anchor cable is provided with 2-6 steel strands.
4. The pile anchor structure capable of adapting to the filling consolidation settlement of claim 3, wherein the number of the steel strands of the anchor cable at the anchoring section of the stable stratum is changed by setting the anchor cable supporting body to disperse pressure.
5. The pile anchor structure capable of adapting to the filling consolidation settlement of claim 1, wherein a steel strand isolation support is arranged between the sliding surface or the position of the potential sliding surface and the soil layer.
6. The pile anchor structure capable of adapting to the settlement of filled concreting of claim 1, wherein the anchoring device comprises an anchor and an anchor sealing concrete arranged on the top of the anchor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220657870.6U CN217027038U (en) | 2022-03-25 | 2022-03-25 | Pile anchor structure capable of adapting to soil filling, consolidation and settlement |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220657870.6U CN217027038U (en) | 2022-03-25 | 2022-03-25 | Pile anchor structure capable of adapting to soil filling, consolidation and settlement |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217027038U true CN217027038U (en) | 2022-07-22 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220657870.6U Active CN217027038U (en) | 2022-03-25 | 2022-03-25 | Pile anchor structure capable of adapting to soil filling, consolidation and settlement |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217027038U (en) |
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2022
- 2022-03-25 CN CN202220657870.6U patent/CN217027038U/en active Active
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