CN112227390A - Novel flexible side slope supporting construction - Google Patents
Novel flexible side slope supporting construction Download PDFInfo
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- CN112227390A CN112227390A CN202011297884.3A CN202011297884A CN112227390A CN 112227390 A CN112227390 A CN 112227390A CN 202011297884 A CN202011297884 A CN 202011297884A CN 112227390 A CN112227390 A CN 112227390A
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- 238000010276 construction Methods 0.000 title description 19
- 239000002131 composite material Substances 0.000 claims abstract description 102
- 238000004873 anchoring Methods 0.000 claims abstract description 66
- 230000007704 transition Effects 0.000 claims abstract description 10
- 239000004570 mortar (masonry) Substances 0.000 claims description 9
- 230000003014 reinforcing effect Effects 0.000 claims description 7
- 230000000087 stabilizing effect Effects 0.000 claims description 6
- 210000002435 tendon Anatomy 0.000 claims description 5
- 230000000694 effects Effects 0.000 description 11
- 230000008901 benefit Effects 0.000 description 7
- 229910000831 Steel Inorganic materials 0.000 description 5
- 230000006378 damage Effects 0.000 description 5
- 230000001681 protective effect Effects 0.000 description 5
- 239000010959 steel Substances 0.000 description 5
- 201000010099 disease Diseases 0.000 description 4
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 4
- 238000009434 installation Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 239000002689 soil Substances 0.000 description 3
- 238000009412 basement excavation Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000002265 prevention Effects 0.000 description 2
- 239000011435 rock Substances 0.000 description 2
- 238000005452 bending Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000001680 brushing effect Effects 0.000 description 1
- 239000004567 concrete Substances 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000003449 preventive effect Effects 0.000 description 1
- 239000011150 reinforced concrete Substances 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D17/00—Excavations; Bordering of excavations; Making embankments
- E02D17/20—Securing of slopes or inclines
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D17/00—Excavations; Bordering of excavations; Making embankments
- E02D17/20—Securing of slopes or inclines
- E02D17/202—Securing of slopes or inclines with flexible securing means
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
- E02D5/74—Means for anchoring structural elements or bulkheads
- E02D5/76—Anchorings for bulkheads or sections thereof in as much as specially adapted therefor
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D2250/00—Production methods
- E02D2250/0046—Production methods using prestressing techniques
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D2600/00—Miscellaneous
- E02D2600/30—Miscellaneous comprising anchoring details
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Abstract
一种新型的柔性边坡支护结构，如图2所示，锚梁主锚索2，预应力复合锚3，复合锚杆31，复合锚索32，复合锚索32的自由段321，复合锚索锚固段322，锚具323，锚梁锚杆连接件33，锚梁4，锚梁自由段41，锚梁锚固段42，中锚索5，预应力锚索外锚段51，过渡段511，预应力锚索锚固段52，预应力锚索自由段53，坡面6，滑坡坡体62，稳定山体63，单锚索7，单锚索锚固段71，单锚索锚固段72，锚梁转向锚杆10，滑坡体滑面12。
A new type of flexible slope support structure, as shown in Figure 2, the main anchor cable 2 of the anchor beam, the prestressed composite anchor 3, the composite anchor rod 31, the composite anchor cable 32, the free section 321 of the composite anchor cable 32, the composite anchor Anchor cable anchoring section 322, anchor 323, anchor beam and anchor rod connector 33, anchor beam 4, anchor beam free section 41, anchor beam anchor section 42, middle anchor cable 5, prestressed anchor cable outer anchor section 51, transition section 511, prestressed anchor cable anchorage section 52, prestressed anchor cable free section 53, slope 6, landslide body 62, stable mountain 63, single anchor cable 7, single anchor cable anchorage section 71, single anchor cable anchorage section 72, The anchor beam is turned to the anchor rod 10, and the sliding surface of the landslide body 12.
Description
Technical Field
The invention belongs to the field of geotechnical engineering, and relates to a side slope supporting structure, in particular to a novel flexible side slope supporting structure.
Background
In the field of slope support, a flexible slope protection net, a prestressed anchor cable frame and an anti-slide pile are widely applied, wherein the flexible slope protection net is used for reinforcing and protecting soil or rock slopes with potential geological disasters such as collapse, shallow sliding, dangerous rock falling and the like, and the prestressed anchor cable frame and the anti-slide pile are mainly applied to the engineering fields such as deep sliding of the slopes, large-scale landslide and slope protection.
An active protection system of a flexible protective net of the prior flexible protective net technology, which takes galvanized high-strength steel wire ropes as main materials, has the advantages of high toughness, high protective strength, easy spreadability and the like. The active protection system has the advantages of being suitable for any slope terrain, standardized in installation procedures, systematized and the like through multiple field tests and comparisons of slope protection projects, wherein the active protection net is formed by combining and installing a high-strength steel wire rope flexible protection net, anchor rods and other installation accessories, the whole system adopts a modularized installation mode, and the construction period and the construction cost are shortened. The method has the advantages of one-step forming, short construction and installation period, high construction speed, no need of square brushing, suitability for various complicated terrains and integral slope connection, but the traditional flexible protective net has no power for large landslides, the tension advantage of the wire mesh cannot be well converted into effective constraint force for deformation of large slope surfaces in the direction of sky, and in addition, for the slope with larger landslide thrust, the anchoring force of the wire mesh and the anchor rope (anchor rod) is limited, and resultant force cannot be effectively formed.
On the other hand, because the area of a single steel wire mesh is large, the pretensioning force of the anchor cable (anchor rod) cannot be effectively distributed to each point of the steel wire mesh in a flat area with unobvious terrain protrusion, and therefore the anti-sliding effect of the combination of the conventional steel wire mesh and the anchor cable (anchor rod) cannot be guaranteed.
The prestressed anchor cable (anchor rod) frame and the anti-slide pile are widely applied to the field of landslide and slope disease control, and a very good slope disease control effect is achieved. However, the prestressed anchor cable frame technology and the slide-resistant pile have the following disadvantages:
1. the frame is large in size, particularly under the condition of large landslide thrust, the reinforced concrete of the frame structure is large in size, and slope greening is not easy to realize due to large area occupation ratio of slope concrete;
2. the slope framework is very difficult to construct, the construction speed is slow, and the method is particularly not suitable for emergency or temporary engineering;
3. the method is not suitable for rapid large-scale construction, and mechanical or semi-mechanical construction is very difficult to realize;
4. for shallow slump or shallow collapse prevention, a prestressed anchor cable (anchor rod) frame causes huge waste of engineering, and in addition, the self weight of the frame can cause unsatisfactory slope collapse prevention effect;
5. the prestressed anchor cable (anchor rod) frame is divided according to products, and the products are isolated from each other through expansion joints, so that once local collapse occurs, the adjacent frame cannot play a combined anti-sliding role.
In order to solve the problems, a novel slope supporting structure (2020111993475, 2020224768983) provides a new solution, on one hand, the advantages of high construction speed of a flexible protective net, being beneficial to slope greening, low construction cost and integral connection of the whole slope are fully exerted, and on the other hand, the strong anchoring force of a prestressed anchor cable in a prestressed anchor cable (anchor rod) frame structure is fully utilized to realize the treatment effect on deep landslides.
However, the above solution still has the following problems:
1. the anchor cables and the anchor rods are mutually independent, the independent relation easily causes that part of the anchor rods are bent and damaged under the action of the tensile force of the anchor beam, and the safety and durability of the anchor rods are difficult to ensure;
2. whether the prestressed slide-resistant pile or the frame anchor cable is adopted, the anchor cable project penetrates through the sliding body and is fixed to the stable layer, any sliding of the sliding body can cause shearing damage or damage to the anchor cable (anchor rod) near the sliding surface, and the damaged anchor cable can be corroded and damaged, so that the durability of the slide-resistant project is influenced;
3. although the anti-slide pile engineering is reliable, once the prestressed anchor cable near the sliding surface fails, the function of the anti-slide pile is greatly discounted, the reliability and the durability of the anti-slide engineering are seriously influenced, and the anti-slide pile engineering is extremely slow in construction speed, high in cost and difficult to construct.
Therefore, a new solution is needed to solve the above problems.
Disclosure of Invention
In order to achieve the purpose, the invention relates to a novel flexible side slope supporting structure, which comprises the following specific contents:
a novel flexible slope supporting structure comprises a flexible wire mesh grid 1, anchor beam main anchor cables 2, prestressed composite anchors 3, composite anchor rods 31, composite anchor cables 32, free sections 321 of the composite anchor cables 32, composite anchor cable anchoring sections 322, anchors 323, anchor beam anchor rod connecting pieces 33, anchor beams 4, anchor beam free sections 41, anchor beam anchoring sections 42, sleeves 43, antirust mortar 44, prestressed ribs 45, middle anchor cables 5, prestressed anchor cable outer anchor sections 51, transition sections 511, reinforcing ribs 512, prestressed anchor cable anchoring sections 52, prestressed anchor cable free sections 53, transition sections 511 of the prestressed anchor cable outer anchor sections 51, slope surfaces 6, slope sliding boundaries 61, slope sliding bodies 62, stabilizing mountain bodies 63, single anchor cables 7, single anchor cable anchoring sections 71, single anchor cable anchoring sections 72, anchor beam steering anchor rods 10, edge supporting ropes 11 and slope body sliding surfaces 12.
The method is characterized in that: the part of the anchor beam 4 fixed on the landslide slope body 62 within the landslide boundary 61 is an anchor beam free section 41, the part of the anchor beam 4 fixed outside the landslide boundary 61 is an anchor beam anchoring section 42, wherein the anchor beam anchoring section 42 is anchored and connected on the landslide body 63 through an anchor beam main anchor rope 2, the anchor beam free section 41 is fixed on the landslide slope body 62 through a prestressed composite anchor 3, a middle anchor rope 5 and a single anchor rope 7, one or more anchor beam main anchor ropes 2 are distributed on the anchor beam anchoring section 42 of the anchor beam 4, an anchor beam steering anchor rod 10 is arranged adjacent to the anchor beam main anchor rope 2, one or more composite anchors 3 are distributed on the anchor beam free section 41, a plurality of middle anchor ropes 5 are arranged adjacent to the prestressed composite anchor 3, the single anchor rope 7 is arranged adjacent to the middle anchor rope 5 and the single anchor rope 7, zero or a plurality of anchor beam steering anchor rods 10 are arranged adjacent to the anchor beam 5 and the single anchor rope 7, the anchor beam 4 and the anchor beam steering anchor rods 10, the prestressed composite anchor 3, the middle anchor cable 5 and the single anchor cable 7 are mechanically connected, a prestressed tendon 45 is arranged in the center of the anchor beam 4, antirust mortar 44 is wrapped outside the prestressed tendon 45, and a sleeve 43 is arranged outside the antirust mortar 44.
The anchor beams 4 are arranged in a transverse or longitudinal crossed manner on the side slope, a middle anchor cable 5 is arranged at the crossed position of every two anchor beams 4, and the prestressed composite anchor 3 or the anchor beam steering anchor rod 10 is arranged; the curve of the anchor beam 4 near the anchor beam steering anchor rod 10 is a convex curve, and the curve of the anchor beam 4 near the middle anchor cable 5 and the single anchor cable 7 is a concave curve.
The flexible wire mesh grids 1 are laid on the slope surface 6, the flexible wire mesh grids 1 are connected with the edge supporting ropes 11, and the edge supporting ropes 11 are mechanically connected with the prestressed composite anchor 3, the single anchor rope 7 and the anchor beam steering anchor rod 10.
The anchor beam main anchor rope 2 and the middle anchor rope 5 are characterized in that the end farthest from the ground surface is a prestressed anchor rope anchoring section 52, the middle section is a prestressed anchor rope free section 53, the end close to the ground surface is a prestressed anchor rope outer anchor section 51, a transition section 511 is arranged between the prestressed anchor rope free section 53 and the prestressed anchor rope outer anchor section 51, a reinforcing rib 512 is arranged at the part of the prestressed anchor rope outer anchor section 51 close to the ground surface, the anchor beam main anchor rope 2 is arranged in a stable mountain body 63, and the middle anchor rope 5 is arranged on a landslide body 62 within a landslide boundary 61.
The prestressed anchor cable anchoring section 52 of the middle anchor cable 5 is communicated up and down on the sliding surface 12 of the landslide body, the lower end of the prestressed anchor cable anchoring section 52 is below the sliding surface 12 of the landslide body, and the upper end part of the prestressed anchor cable anchoring section 52 is positioned in the landslide body 62 above the sliding surface 12 of the landslide body.
The prestressed composite anchor 3 is composed of one or more composite anchor rods 31 and one or more composite anchor cables 32, the composite anchor rods 31 and the composite anchor cables 32 are fixed near the upper end of the composite anchor rods 31 through anchor devices 323 arranged at the top ends of free sections 321 of the composite anchor cables 32, anchor beam anchor rod connecting pieces 33 are arranged at the upper ends of the composite anchor rods 31, the included angle between any one composite anchor rod 31 and any one composite anchor cable 32 on the same prestressed composite anchor 3 is alpha, and is more than or equal to 30 degrees and less than or equal to 180 degrees, the composite anchor 3 and the anchor beam 4 are connected together at the anchor beam free section 41 through the anchor beam anchor rod connecting pieces 33, and the composite anchor cables 32 are composed of the anchor devices 323, the free sections 321 and the composite anchor cable sections 322 from top to bottom.
The single anchor cable 7 is composed of a single anchor cable anchoring section 71 and a single anchor cable free section 72, the single anchor cable free section 72 is mechanically connected with the anchor beam free section 41, the single anchor cable 7 is arranged in the landslide body 62 within the landslide boundary 61 and above the landslide body sliding surface 12, and the composite anchor 3 or the anchor beam steering anchor rod 10 is arranged close to the single anchor cable 7.
The anchor beam steering anchor rod 10 is mechanically connected with the anchor beam 4, and the included angle theta between the anchor beam steering anchor rod 10 and the anchor beam 4 is not more than 90 degrees.
The invention relates to a novel flexible slope supporting structure, wherein the part of an anchor beam 4 fixed outside a landslide boundary 61 is an anchor beam anchoring section 42, the anchor beam anchoring section 42 receives anchoring force from an anchor beam main anchor rope 2 and is anchored in a stable mountain 63, the part of the anchor beam 4 fixed on a landslide slope 62 within the landslide boundary 61 is an anchor beam free section 41, the pulling force from the anchor beam main anchor rope 2 acts on the anchor beam anchoring section 42 on the anchor beam 4, the anchor beam anchoring section 42 changes the direction through an anchor beam steering anchor rod 10 and then transmits the pulling force to the anchor beam free section 41, the anchor beam free section 41 further generates force towards the mountain on the landslide slope 62 within the landslide boundary 61 through a middle anchor rope 5, a composite anchor 3, a single anchor rope 7 and an anchor beam steering anchor rod 10 in a slide body, so as to prevent the landslide slope 62 from sliding down and realize the anchoring effect.
The landslide thrust of the future slope surface 6 of the flexible wire mesh 1 to the empty surface is transmitted to the composite anchor 3, the middle anchor rope 5, the single anchor rope 7 and the anchor beam steering anchor rod 10 through the edge supporting rope 11, the composite anchor 3, the single anchor rope 7, the middle anchor rope 5 and the anchor beam steering anchor rod 10 further transmit force to the anchor beam free section 41, the anchor beam free section 41 further transmits the force from the composite anchor 3, the middle anchor rope 5 and the single anchor rope 7 to the anchor beam anchoring section 42, and the anchor beam anchoring section 42 further realizes anchoring effect through the anchoring tension of the anchor beam main anchor rope 2 to the stable mountain 63.
The prestressed composite anchor 3 is composed of one or more composite anchor rods 31 and one or more composite anchor cables 32, the composite anchor rods 31 and the composite anchor cables 32 are fixed near the upper end of the composite anchor rods 31 through anchor devices 323 arranged at the top ends of free sections 321 of the composite anchor cables 32, an included angle between any one composite anchor rod 31 and any one composite anchor cable 32 on the same prestressed composite anchor 3 is a, the included angle is larger than or equal to 30 degrees and smaller than or equal to 180 degrees, and the combined structure of the composite anchor 3 greatly reduces the risk of bending and damage of the composite anchor rods 31 under the tension action of the free sections 41 of the anchor beams.
The prestressed anchor cable anchoring section 52 of the middle anchor cable 5 is communicated up and down on the sliding surface 12 of the landslide body, the lower end of the prestressed anchor cable anchoring section 52 is below the sliding surface 12 of the landslide body, and the upper end part of the prestressed anchor cable anchoring section 52 is positioned in the landslide body 62 above the sliding surface 12 of the landslide body, so that the situation that the landslide body 62 slides and the anchoring effect of the anchor cable anchoring section 52 is damaged further to cause the tension failure of the outer anchor section 51 of the upper anchor cable of the middle anchor cable 5 on the free anchor beam section 41, and the overall anchoring effect of the anchor beam 4 on the landslide body 62 is influenced is avoided.
The single anchor cable 7 consists of a single anchor cable anchoring section 71 and a single anchor cable free section 72, the single anchor cable free section 72 is mechanically connected with the anchor beam free section 41, the single anchor cable 7 is arranged in the landslide body 62 above the landslide body sliding surface 12 within the landslide boundary 61, the single anchor cable 7 directly transmits the gliding force of the landslide body to the anchor beam 4, and simultaneously the linear type of the anchor beam 4 is changed, so that the axial pressure bearing of the composite anchor rod 31 of the prestressed composite anchor 3 is facilitated.
The anchor beam steering anchor rod 10 is mechanically connected with the anchor beam 4, and the included angle theta between the anchor beam steering anchor rod 10 and the anchor beam 4 is not more than 90 degrees.
The benefits of the invention are: through implementing a neotype flexible side slope supporting construction stage by stage, provide a neotype supporting scheme for the side slope, improved the overall stability of the slope body when having avoided the landslide body to engineering anchor rope structural damage, effectively stopped near the slip surface anchor rope corrosion inefficacy harm that causes for the construction progress, reduce the time limit for a project, reduce engineering cost, increase the reliability of structure, provide important basis for domatic afforestation and environment friendly simultaneously.
Drawings
FIG. 1 is a schematic plan view of the present invention;
FIG. 2 is a schematic structural view of the novel flexible slope supporting structure perpendicular to the slope direction;
fig. 3 is a schematic view of the structure and arrangement of the anchor beam main anchor cable 2 and the middle anchor cable 5 perpendicular to the slope surface direction;
fig. 4 is a schematic structural view of the outer anchor segment 51 of the anchor cable;
fig. 5 is a schematic structural view of the prestressed composite anchor 3;
fig. 6 is a schematic structural view of the anchor beam 4;
FIG. 7 is a schematic plan view of example 2;
FIG. 8 is a schematic plan view of example 3;
FIG. 9 is a schematic plan view of example 4.
In the figure: the flexible wire mesh grid 1, the anchor beam main anchor rope 2, the prestressed composite anchor 3, the composite anchor rod 31, the composite anchor rope 32, the free section 321 of the composite anchor rope 32, the composite anchor rope anchoring section 322, the anchorage 323, the anchor beam anchor rod connecting piece 33, the anchor beam 4, the anchor beam free section 41, the anchor beam anchoring section 42, the sleeve 43, the antirust mortar 44, the prestressed tendon 45, the middle anchor rope 5, the prestressed anchor rope outer anchor section 51, the transition section 511, the reinforcing rib 512, the prestressed anchor rope anchoring section 52, the prestressed anchor rope free section 53, the transition section 511 of the prestressed anchor rope outer anchor section 51, the slope surface 6, the slope boundary 61, the landslide body 62, the stable mountain body 63, the single anchor rope 7, the single anchor rope anchoring section 71, the single anchor rope anchoring section 72, the anchor beam steering anchor rod 10, the edge supporting rope 11 and the landslide body sliding surface 12.
Detailed Description
The structure and the advantages of the present invention will be further described with reference to fig. 1, fig. 2, fig. 3, fig. 4, fig. 5, fig. 6, fig. 7, fig. 8, and fig. 9.
Example 1
The application of a novel flexible side slope supporting structure on a typical landslide comprises the following structural steps:
as shown in fig. 1, 2, 3, 4, 5, 6, the construction of the anchor beam main anchor rope 2, the middle anchor rope 5 and the single anchor rope 7 is first performed, wherein the lower end of the prestressed anchor rope anchoring section 52 of the middle anchor rope 5 is below the landslide body sliding surface 12, the upper end of the prestressed anchor rope anchoring section 52 is above the landslide body sliding surface 12 and is located in the landslide body 62, and the construction of the prestressed anchor rope free section 53, the transition section 511 and the prestressed anchor rope outer anchor section 51 of the anchor beam main anchor rope 2 and the middle anchor rope 5 is simultaneously completed, wherein the prestressed anchor rope outer anchor section 51 is provided with the reinforcing ribs 512 at a portion adjacent to the ground surface, the main anchor rope 2 is arranged in the stabilizing mountain body 63, the middle anchor rope 5 is arranged on the landslide body 62 within the landslide boundary 61, wherein the single anchor rope 7 is composed of the single anchor rope anchoring section 71 and the single anchor rope free section 72, and the anchor beam free section 41 are mechanically connected together, the single anchor line 7 is arranged within the landslide body 62 above the landslide body sliding surface 12 within the landslide boundary 61.
Further completing the construction of the prestressed composite anchor 3, arranging the prestressed composite anchor 3 on a landslide slope body 62 within a landslide boundary 61, completing the construction of the composite anchor 31, the composite anchor rope anchoring section 322 of the composite anchor rope 32, the free section 321 of the composite anchor rope 32 and the embedded anchor beam anchor rod connecting piece 33, waiting for the strength age of the anchor beam main anchor rope 2, the middle anchor rope 5, the prestressed composite anchor 3 and the single anchor rope 7, and then implementing the prestressed pre-tensioning of the anchor beam main anchor rope 2 and the middle anchor rope 5, wherein the middle anchor rope 5 utilizes the anchoring tension of the prestressed anchor rope anchoring section 52 and the counter force provided by the prestressed anchor rope outer anchor section 51 to realize the anchoring effect for the first time, and implements the connecting prestressed tensioning between the composite anchor 31 and the composite anchor rope 32 in the prestressed composite anchor 3 through the anchor 323 to complete the connection of the composite anchor 31 and the composite anchor rope 32.
Further, construction of the prestressed anchor beam steering anchor rod 10 is implemented, the anchor beam steering anchor rod 10 is mechanically connected with the anchor beam 4, and the included angle theta between the anchor beam steering anchor rod 10 and the anchor beam 4 is not more than 90 degrees.
Further, an anchor beam 4 which is not injected with antirust mortar 44 is installed, an anchor beam anchoring section 42 of the anchor beam 4 is mechanically connected with an anchor beam main anchor cable 2 and an anchor beam steering anchor rod 10 respectively, an anchor beam free section 41 and the prestressed composite anchor 3 are connected together through an embedded anchor beam anchor rod connecting piece 33 and are mechanically connected with a middle anchor cable 5, a single anchor cable 7 and an anchor beam steering anchor rod 10, the anchor beams 4 are arranged in a transverse or longitudinal cross mode on the side slope, and the middle anchor cable 5, the prestressed composite anchor 3, the single anchor cable 7 or the anchor beam steering anchor rod 10 are arranged at the cross position of every two anchor beams 4.
The curve of the anchor beam 4 near the anchor beam steering anchor rod 10 is a convex curve, the curve of the anchor beam 4 near the middle anchor cable 5 and the curve of the anchor beam near the single anchor cable 7 are concave curves.
Further, secondary tensioning is carried out on the ground surface of the main anchor cable 2, the middle anchor cable 5 and the single anchor cable 7 of the anchor beam according to design requirements, the anchor cable tension of the main anchor cable 2, the middle anchor cable 5 and the single anchor cable 7 of the anchor beam is further applied to the prestressed composite anchor 3 and the anchor beam steering anchor rod 10, the anchor cable tension is further transmitted to the soil body near the ground surface 6 through the friction force and the end bearing force of the prestressed composite anchor 3 and the anchor beam steering anchor rod 10 to the surrounding soil body, and the anchoring effect is achieved.
Further, the flexible wire mesh grid 1 is installed, the edge supporting ropes 11 are connected with the adjacent prestress composite anchors 3, the slope surface 6 landslide thrust to the free surface is transmitted to the edge prestress composite anchors 3 through the edge supporting ropes 11, the single anchor rope 7 and the anchor beam steering anchor rods 10 are further used for the prestress composite anchors 3, the single anchor rope 7 and the anchor beam steering anchor rods 10 transmit the force to the anchor beams 4, the anchor beams 4 further transmit the force to the middle anchor rope 5 and the anchor beam main anchor rope 2 respectively, and the anchor beam main anchor rope 2 and the middle anchor rope 5 realize the anchoring effect to the anchoring tension in the broken body.
Further, rust preventive mortar 44 is applied to the inside of the sleeve 43 of the anchor beam 4.
Finally, performing antirust protection treatment on the anchor beam 4 and each connecting joint of the prestressed composite anchor 3, the middle anchor cable 5, the anchor beam steering anchor rod 10 and the anchor beam main anchor cable 2.
Example 2
As shown in fig. 7, a novel flexible slope supporting structure is an embodiment of anchoring on a long-strip-shaped landslide and stabilizing mountain bodies on two sides of the landslide;
only the anchor beam 4 bent transversely downward and downward is arranged, both ends of the anchor beam 4 are on the stabilizing mountain body, and the main anchor line 2 of the anchor beam and the anchor beam steering anchor rod 10 are connected with the stabilizing mountain body 63, and other structures and implementation steps are the same as those of embodiment 1.
Example 3
As shown in fig. 8, an embodiment of a novel flexible slope supporting structure for disease control of artificially excavated cutting slope protection is provided;
the anchor beams 4 are arranged on two sides of the excavated slope and the rear stable mountain body, the shape of the anchor beams 4 is a curve which is concave downwards, the boundary of the cutting excavation surface is regarded as a landslide boundary 61, the anchor beam anchoring sections 42 at two ends of the anchor beams 4 are connected with the upper and two side stable mountain bodies 63 through anchor beam main anchor cables 2 and anchor beam steering anchor rods 10, and other structures and implementation steps are the same as those of the embodiment 1.
Example 4
As shown in fig. 9, an embodiment of a novel flexible slope supporting structure for disease control of artificially excavated cutting slope protection is provided;
the anchor beams 4 are arranged on two sides of the excavated slope and the rear stable mountain body, the shape of each anchor beam 4 is a criss-cross straight line, the cut excavation surface boundary is regarded as a landslide boundary 61, the anchor beam anchoring sections 42 at two ends of each anchor beam 4 are connected with the upper and two side stable mountain bodies 63 through the anchor beam main anchor cables 2 and the anchor beam steering anchor rods 10, and other structures and implementation steps are the same as those in embodiment 1.
Claims (6)
1. A novel flexible side slope supporting structure comprises a flexible wire mesh grid (1), an anchor beam main anchor cable (2), a prestressed composite anchor (3), a composite anchor rod (31), a composite anchor cable (32), a free section (321) of the composite anchor cable (32), a composite anchor cable anchoring section (322), an anchorage device (323), an anchor beam anchor rod connecting piece (33), an anchor beam (4), an anchor beam free section (41), an anchor beam anchoring section (42), a sleeve (43), antirust mortar (44), a prestressed rib (45), a middle anchor cable (5), a prestressed anchor cable outer anchoring section (51), a transition section (511), a reinforcing rib (512), a prestressed anchor cable anchoring section (52), a prestressed anchor cable free section (53), a transition section (511) of the prestressed anchor cable outer anchoring section (51), a slope surface (6), a landslide boundary (61), a landslide slope body (62) and a stabilizing mountain body (63), single anchor rope (7), single anchor rope anchor section (71), single anchor rope anchor section (72), anchor beam steering stock (10), border stay rope (11), landslide body sliding surface (12), its characterized in that:
the part of the anchor beam (4) fixed on the landslide slope body (62) within the landslide boundary (61) is an anchor beam free section (41), the part of the anchor beam (4) fixed outside the landslide boundary (61) is an anchor beam anchoring section (42), wherein the anchor beam anchoring section (42) is anchored and connected on the stable mountain body (63) through an anchor beam main anchor rope (2), and the anchor beam free section (41) is fixed on the landslide slope body (62) through a prestress composite anchor (3), a middle anchor rope (5), a single anchor rope (7) and an anchor beam steering anchor rod (10);
one or more anchor beam main anchor cables (2) are distributed on an anchor beam anchoring section (42) of the anchor beam (4), anchor beam steering anchor rods (10) are arranged close to the anchor beam main anchor cables (2), one or more composite anchors (3) are distributed on an anchor beam free section (41), a plurality of middle anchor cables (5) and single anchor cables (7) are arranged close to the prestressed composite anchors (3), and zero or more anchor beam steering anchor rods (10) are arranged close to the middle anchor cables (5) and the single anchor cables (7);
the anchor beam (4) is mechanically connected with the anchor beam main anchor cable (2), the anchor beam steering anchor rod (10), the prestressed composite anchor (3), the middle anchor cable (5) and the single anchor cable (7);
the center of the anchor beam (4) is provided with a prestressed tendon (45), the prestressed tendon (45) is wrapped with antirust mortar (44), and the outer part of the antirust mortar (44) is provided with a sleeve (43);
the anchor beams (4) are arranged in a transverse or longitudinal crossed manner on the side slope, a middle anchor cable (5), a prestressed composite anchor (3) and an anchor beam steering anchor rod (10) or a single anchor cable (7) are arranged at the crossed position of every two anchor beams (4);
the curve of the anchor beam (4) near the anchor beam steering anchor rod (10) is a convex curve, and the curve of the anchor beam (4) near the middle anchor cable (5) and the single anchor cable (7) is a concave curve;
the flexible wire mesh grids (1) are laid on the slope surface (6), the flexible wire mesh grids (1) are connected with the edge supporting ropes (11), the edge supporting ropes (11) are connected with the prestressed composite anchor (3), the anchor beam steering anchor rod (10) and the single anchor cable (7) through mechanical connection.
2. The anchor beam main anchor cable (2) and the middle anchor cable (5) as claimed in claim 1, wherein the end farthest from the ground surface is a prestressed anchor cable anchoring section (52), the middle section is a prestressed anchor cable free section (53), the end near the ground surface is a prestressed anchor cable outer anchor section (51), a transition section (511) is provided between the prestressed anchor cable free section (53) and the prestressed anchor cable outer anchor section (51), and a part of the prestressed anchor cable outer anchor section (51) near the ground surface is provided with a reinforcing rib (512); the anchor beam main anchor cable (2) is arranged in a stable mountain body (63), and the middle anchor cable (5) is arranged on a landslide body (62) within a landslide boundary (61).
3. A center bolt (5) according to claim 1, wherein the pre-stressed anchor cable anchoring section (52) of the center bolt (5) is through-going above and below the landslide body sliding surface (12), the lower end of the pre-stressed anchor cable anchoring section (52) is below the landslide body sliding surface (12), and the upper end portion of the pre-stressed anchor cable anchoring section (52) is located within the landslide body (62) above the landslide body sliding surface (12).
4. The prestressed composite anchor (3) according to claim 1, wherein the prestressed composite anchor (3) is composed of one or more composite anchor rods (31) and one or more composite anchor cables (32), the composite anchor rods (31) and the composite anchor cables (32) are fixed near the upper end of the composite anchor rods (31) by anchors (323) arranged at the top ends of free sections (321) of the composite anchor cables (32), the upper end of the composite anchor rods (31) is provided with anchor beam anchor rod connecting members (33), an included angle between any one composite anchor rod (31) and the composite anchor cable (32) on the same prestressed composite anchor (3) is a, and satisfies 30 ° -180 ° -a, the composite anchor (3) and the anchor beam (4) are connected together at the anchor beam free section (41) by the anchor beam anchor rod connecting members (33), the composite anchor cables (32) are composed of the anchors (323) and the free sections (321) from top to bottom, a composite anchor cable anchoring section (322).
5. A single anchor cable (7) according to claim 1, characterised in that the single anchor cable (7) consists of a single anchor cable anchoring section (71) and a single anchor cable free section (72), the single anchor cable free section (72) being mechanically connected to the anchor beam free section (41), the single anchor cable (7) being arranged in the landslide mass (62) within the landslide boundary (61) and above the landslide mass sliding surface (12), the composite anchor (3) or the anchor beam steering anchor (10) being arranged next to the single anchor cable (7).
6. An anchor beam steering bolt (10) according to claim 1 in mechanical connection with an anchor beam (4) and the angle θ between the anchor beam steering bolt (10) and the anchor beam (4) is not more than 90 °.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011297884.3A CN112227390A (en) | 2020-11-18 | 2020-11-18 | Novel flexible side slope supporting construction |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011297884.3A CN112227390A (en) | 2020-11-18 | 2020-11-18 | Novel flexible side slope supporting construction |
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| CN112227390A true CN112227390A (en) | 2021-01-15 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115354671A (en) * | 2022-07-28 | 2022-11-18 | 四川省公路规划勘察设计研究院有限公司 | An Anchor Pull Structure Used for In-Situ Reinforcement of Dangerous Rock |
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| JPH07292675A (en) * | 1994-04-25 | 1995-11-07 | Sumikin Kozai Kogyo Kk | Slope protection structure |
| JP2004316374A (en) * | 2003-04-21 | 2004-11-11 | Daiwa Kogyo Kk | Slope stabilizing method |
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| CN115354671A (en) * | 2022-07-28 | 2022-11-18 | 四川省公路规划勘察设计研究院有限公司 | An Anchor Pull Structure Used for In-Situ Reinforcement of Dangerous Rock |
| CN115354671B (en) * | 2022-07-28 | 2023-09-26 | 四川省公路规划勘察设计研究院有限公司 | Anchor-pulling structure for in-situ reinforcement of dangerous rock |
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