CN113373952A - A connection structure for collapsible loess side slope support - Google Patents
A connection structure for collapsible loess side slope support Download PDFInfo
- Publication number
- CN113373952A CN113373952A CN202110638517.3A CN202110638517A CN113373952A CN 113373952 A CN113373952 A CN 113373952A CN 202110638517 A CN202110638517 A CN 202110638517A CN 113373952 A CN113373952 A CN 113373952A
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- slope
- steel wire
- wire mesh
- collapsible loess
- concrete
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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
- E02D17/207—Securing of slopes or inclines with means incorporating sheet piles or piles
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D19/00—Keeping dry foundation sites or other areas in the ground
- E02D19/02—Restraining of open water
-
- 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
- E03—WATER SUPPLY; SEWERAGE
- E03F—SEWERS; CESSPOOLS
- E03F5/00—Sewerage structures
- E03F5/04—Gullies inlets, road sinks, floor drains with or without odour seals or sediment traps
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A30/00—Adapting or protecting infrastructure or their operation
- Y02A30/60—Planning or developing urban green infrastructure
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- Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- Civil Engineering (AREA)
- Paleontology (AREA)
- General Life Sciences & Earth Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Health & Medical Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Public Health (AREA)
- Water Supply & Treatment (AREA)
- Pit Excavations, Shoring, Fill Or Stabilisation Of Slopes (AREA)
Abstract
The invention discloses a connection structure for collapsible loess slope support, which comprises concrete lattice drainage channels arranged in a plurality of rhombuses on the slope surface of a collapsible loess slope; drilling holes at the vertex position of each rhombus, and sequentially anchoring prestressed anchor rods and anti-collapse anchor rods in a layered and staggered manner; the anti-collapse anchor rod comprises a steel wire mesh circular tube, concrete poured in the steel wire mesh circular tube and pseudo-ginseng grey soil for absorbing water in the collapsed loess slope; the length of the concrete poured into the round steel wire mesh pipe is 1/3 of the total length of the round steel wire mesh pipe; the distance between the pseudo-ginseng gray soil injected into the steel wire mesh round pipe and the slope surface of the collapsible loess slope is 10-15 cm. The concrete lattice drainage channel can absorb water in the soil body, reduce the collapsibility of the soil body, form a tie to the concrete lattice drainage channel, avoid the separation of the drainage channel from the slope body and the occurrence of secondary disasters, has simple and firm structure and good strength, can well prevent the sliding of the slope body, and can reduce the collapsibility of the soil body.
Description
Technical Field
The invention belongs to the technical field of slope support, and particularly relates to a connection structure for collapsible loess slope support.
Background
In recent years, with the development of economy and the improvement of the requirements of people on living environment, projects such as buildings, municipal works and the like in China are rapidly developed. Many cities build residential projects with locations near the side slopes. Side slopes in common geology can be supported and treated by anchor-shotcrete support, gravity retaining walls, slope ratio methods and the like, but in collapsible loess areas, the conventional treatment mode is slightly deficient.
Collapsible loess is mainly characterized in that the collapsible loess is immersed in water and subsides, the loess exists in rainless arid areas, water in the loess evaporates, solidification cohesion is generated in soil bodies, compaction of upper soil to lower soil is prevented, a state of insufficient compaction is formed, and after the soil is immersed in water, the solidification cohesion disappears, so that the collapse is generated. The common slope supporting mode is to raise the sliding resistance of the sliding body with anchor rod, retaining wall, etc. However, in the case of collapsible loess, once the loess is immersed in water and collapsed, negative frictional resistance is formed on a support system such as an anchor rod and the like, and the anchorage property is reduced. The concrete is sprayed on the whole slope, which is not economical, so that when the collapsible loess slope is reinforced and supported, the full consideration of the collapsible characteristic is very important.
Disclosure of Invention
Based on the defects in the prior art, the invention aims to provide a connection structure for collapsible loess slope support, which can reinforce the soil body of collapsible loess, so that the landslide is skid-resistant, and meanwhile, the soil body can be prevented from being collapsed in the vertical direction, thereby improving the stability of the collapsible loess slope.
In order to solve the technical problems, the invention is realized by the following technical scheme: the invention provides a connecting structure for collapsible loess slope support, which comprises concrete lattice drainage channels arranged in a plurality of rhombuses on the slope surface of a collapsible loess slope; drilling holes at the vertex position of each rhombus, and sequentially anchoring prestressed anchor rods and anti-collapse anchor rods in a layered and staggered manner; the anti-collapse anchor rod comprises a steel wire mesh circular tube, concrete poured in the steel wire mesh circular tube and pseudo-ginseng grey soil for absorbing water in the collapsed loess slope; the length of the concrete poured into the round steel wire mesh pipe is 1/3 of the total length of the round steel wire mesh pipe; the distance between the pseudo-ginseng gray soil injected into the steel wire mesh round pipe and the slope surface of the collapsible loess slope is 10-15 cm.
The steel wire mesh round pipe is of a hollow structure, the steel wire mesh round pipe and pseudo-ginseng gray soil are made into an anti-collapse anchor rod, the pseudo-ginseng gray soil is filled in the anti-collapse anchor rod, and the anti-collapse anchor rod is used for adsorbing water in soil and forming a member with certain strength together with the steel wire mesh round pipe after being hardened.
Optionally, the round steel wire mesh pipe is horizontally inserted into the collapsible loess slope in a manner of being parallel to the horizontal plane; the prestressed anchor rod is anchored into the collapsible loess slope at an inclination angle of 10-35 degrees downward from the horizontal plane; the steel wire mesh circular pipes and the prestressed anchor rods are arranged in a layered and staggered mode in the vertical direction, the distance between each steel wire mesh circular pipe and each prestressed anchor rod is 2m, and the distance between each steel wire mesh circular pipe and each prestressed anchor rod which are adjacent to each other in the upper layer and the lower layer is 2 m.
Optionally, the round steel wire mesh pipe is made of steel bars with the diameter of 2.2mm, the distance between grids is 10mm, the diameter of the round steel wire mesh pipe is 30mm, and 15cm is reserved outside the slope surface of the collapsible loess slope.
Optionally, the length of the concrete lattice drainage channel is 1.6m, the thickness of the channel bottom is 0.15m, the height of the channel net is 0.1m, the width of the channel net is 0.2m, and the thickness of the channel wall net is 0.1 m.
Optionally, concrete is poured on site at the splicing joint of the concrete lattice drainage channel on the slope surface, so that the thickness of the concrete lattice drainage channel is flush with the bottom of the concrete lattice drainage channel.
The concrete lattice drainage channels are arranged on the slope surface according to a regular rhombus, the steel wire mesh circular pipes and the prestressed anchor rods are evenly and alternately arranged on the slope surface in a layered mode, and the pseudo-ginseng soil is poured into the steel wire mesh circular pipes. The concrete lattice drainage channel, the reinforcing mesh circular tube and the prestressed anchor rod are connected together by concrete. The connection structure for collapsible loess slope support can absorb water in soil body, reduce the collapse amount of the soil body, and form tie to the concrete lattice drainage channel to avoid the separation of the drainage channel from the slope body and the occurrence of secondary disaster.
The technical scheme of the invention has the following beneficial effects:
1) the invention has simple and firm structure, good strength, long service life, good corrosion resistance and high safety performance, can well prevent the sliding of a slope body and reduce the collapsibility of a soil body. Meanwhile, the structure is more economical due to the arrangement of the steel wire mesh circular pipe and the pseudo-ginseng gray soil.
2) The invention adopts a mode that two anchor rods are alternately arranged by taking a layer as a unit, the pseudo-ginseng soil ash in the circular steel wire mesh pipe can be combined with silicon dioxide or aluminum oxide, ferric oxide and other substances in soil when loess is soaked in water to generate colloidal calcium silicate, calcium aluminate and calcium ferrite, the soil is cemented, the soil ash is gradually hardened and has higher strength and water resistance, the adhesion strength among soil particles is increased, and the circular steel wire mesh pipe is horizontally anchored and uniformly arranged in the horizontal direction to form a horizontal interlayer macroscopically, so that the wet sinking of a soil body can be reduced to a certain degree.
3) According to the invention, the conventional concrete lattice protection slope is made into the drainage channel, when a rainy season comes, most rainwater can be smoothly drained into the slope toe drainage channel, the rainwater amount flowing into a soil body is reduced, and the spliced drainage channel is poured with concrete at the splicing point, so that the steel wire mesh circular pipe, the prestressed anchor rod and the concrete drainage channel can be connected together. The anchor rod also plays a role in drawing the concrete drainage channel, and the stability of the structure is improved.
The foregoing description is only an overview of the technical solutions of the present invention, and in order to make the technical means of the present invention more clearly understood, the present invention may be implemented in accordance with the content of the description, and in order to make the above and other objects, features, and advantages of the present invention more clearly understood, the following detailed description is given in conjunction with the preferred embodiments, together with the accompanying drawings.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings of the embodiments will be briefly described below.
Fig. 1 is an elevation view of a support structure for collapsible loess slope according to an embodiment of the present invention;
fig. 2 is a schematic structural view of an anti-collapse anchor rod provided by an embodiment of the invention;
fig. 3 is a sectional view of a support structure for a collapsible loess slope according to an embodiment of the present invention;
FIG. 4 is a schematic structural view of a concrete lattice drainage channel provided by an embodiment of the present invention;
fig. 5 is a cross-sectional view of fig. 4.
In the figure, 1 is a concrete lattice drainage channel, 2 is an anti-collapse anchor rod, 3 is a prestressed anchor rod, 4 is pseudo-ginseng gray soil, 5 is concrete, and 6 is a steel wire mesh circular tube.
Detailed Description
Other aspects, features and advantages of the present invention will become apparent from the following detailed description, taken in conjunction with the accompanying drawings, which form a part of this specification, and which illustrate, by way of example, the principles of the invention. In the referenced drawings, the same or similar components in different drawings are denoted by the same reference numerals.
As shown in fig. 1 to 5, the connection structure concrete lattice drainage channel 1 for collapsible loess slope support, the prestressed anchor rods 3, the steel wire mesh circular tubes 6 and the pseudo-ginseng gray soil 4 are used for reinforcing and supporting the side slope in a collapsible loess area, can provide enough anchoring force for the side slope body to prevent the side slope body from sliding, can reduce the collapse amount of the collapsible loess slope body in the vertical direction, and simultaneously prevents the slope body from being separated from the slope concrete lattice drainage channel, thereby avoiding secondary disasters of the side slope.
The prestressed anchor rod 3 is an anchor rod made of common prestressed spiral steel bars and used for reinforcing a side slope; the concrete lattice drainage channel 1 is spliced on the slope surface in a diamond shape, so that drainage is facilitated and the slope is beautified; the prestressed anchor rod 3 is sprayed with anticorrosive paint, so that the anticorrosive and anti-corrosion effects are good, and the service life is long.
Concrete lattice drainage channel 1 arranges on the domatic of collapsible loess slope with a plurality of rhombuses, and crisscross concrete lattice drainage channel 1 can conveniently drain water. The juncture of the concrete lattice drainage channel 1 is just the position of the prestressed anchor rod 3 and the anti-collapse anchor rod 2, after the concrete channel 1 is arranged, concrete is poured manually at the juncture, and the thickness of the concrete is consistent with that of the bottom of the concrete lattice drainage channel 1. The concrete lattice drainage channel 1 is connected with the anchor rod together, so that the side slope can be supported, and the concrete lattice drainage channel and the anchor rod can play a role in mutual tie, so that the structural stability is enhanced.
The prestressed anchor rods 3 are anchored into the collapsible loess side slope at an inclination angle of 10-35 degrees downward from the horizontal plane, so that sufficient anti-sliding force can be provided for the side slope, and the sliding of the slope body is prevented. The round steel wire mesh pipe 6 is horizontally inserted into the collapsible loess slope in a mode of being parallel to the horizontal plane, 15cm is reserved outside the slope, concrete and pseudo-ginseng gray soil are poured into the round steel wire mesh pipe 6, and the length of concrete 5 poured into the round steel wire mesh pipe 6 is 1/3 of the total length of the pipe, but is not more than 10 m. Injecting the pseudo-ginseng gray soil into the round steel wire mesh pipe 6, and stopping injecting at a position 10-15 cm away from the slope surface. When collapsible loess slope body soaks, the pseudo-ginseng lime can take place the sclerosis, forms the anti collapsible stock 2 that has certain intensity together with wire net pipe 6, can absorb the water in the soil body of collapsible loess, when having reduced the collapsible volume of soil body, also forms the draw structure with concrete lattice drainage channel 1, has prevented that the slope body from breaking away from with concrete lattice drainage channel 1, avoids the slope secondary to take place the calamity. Because the anti-collapse anchor rods 2 and the pre-stressed anchor rods 3 are arranged on the slope surface in a layered and staggered mode, the distance between the circular steel wire mesh pipe 6 and the pre-stressed anchor rods 3 is 2m on each layer, the distance between the circular steel wire mesh pipe 6 and the pre-stressed anchor rods 3 adjacent to the upper layer and the lower layer is 2m, a mesh plane is almost formed in the space, and the anchoring force can be improved.
The length of the concrete lattice drainage channel 1 is 1.6m, the thickness of the channel bottom is 0.15m, the height of the channel net is 0.1m, the width of the channel net is 0.2m, and the thickness of the channel wall is 0.1 m. The concrete lattice drainage channel 1 is spliced on the slope surface, and concrete is poured on site at the splicing joint, so that the thickness of the concrete lattice drainage channel 1 is flush with the bottom of the concrete lattice drainage channel 1. The round steel wire mesh pipe 6 is made of steel bars with the diameter of 2.2mm, the distance between grids is 10mm, and the diameter of the round steel wire mesh pipe 6 is 30 mm.
The construction method of the connection structure for collapsible loess slope support comprises the following steps:
during construction, the slope surface is leveled, the positions of anchor rods (the prestressed anchor rods 3 and the anti-collapse anchor rods 2) are found out on the slope surface according to a regular diamond shape with the side length of 2m, and the specific length of the prestressed anchor rods 3 is determined according to design. And drilling holes at the top of each rhombus, and anchoring the prestressed anchor rods 3 and the steel wire mesh circular tubes 6 in a layered and staggered manner. Cement mortar is poured into the anchoring section of the prestressed anchor rod 3; spraying antirust paint on the free section for corrosion prevention and rust prevention; the anchor head extends out of the slope body for a certain length, and the tensioning machine is used for clamping the anchor head to apply corresponding prestress to the free section of the prestressed anchor rod 3. And (3) pouring concrete 5 with the total length of 1/3 but not more than 10m into the circular steel wire mesh pipe 6, after the concrete is solidified, pouring pseudo-ginseng soil ash, and stopping pouring at a position 10-15 cm away from the slope surface. Installing the concrete lattice drainage channel 1, after all the arrangement is finished, manually pouring concrete at the joint, plugging the pseudo-ginseng gray soil in the steel wire mesh circular tube 6 by using the concrete, and continuing pouring to finally enable the thickness of the concrete to be consistent with the thickness of the bottom of the channel.
The concrete lattice drainage channel 1, the prestressed anchor rods 3, the pseudo-ginseng gray soil 4 and the steel wire mesh circular tube 6 form a connecting structure, so that the sliding of a side slope can be prevented, the collapse amount of the side slope can be reduced, the anchor rods which are uniformly arranged form a mesh plane in the slope body, the anchoring force of the structure is improved, the anti-collapse anchor rods which are formed by the steel wire mesh circular tube 6 and the pseudo-ginseng gray soil 4 can absorb water in the soil body, rod pieces with certain strength can be formed after water absorption and hardening, a pulling effect is achieved on the concrete lattice drainage channel, and the whole supporting and connecting structure is reinforced.
The foregoing is illustrative of the principles of the present invention and is not intended to limit the invention to the exact construction and operation shown and described, and it will be appreciated by those skilled in the art that various modifications and changes may be made without departing from the principles of the invention, which are to be considered within the purview of the invention.
Claims (5)
1. The utility model provides a connection structure for collapsible loess side slope support which characterized in that: the method comprises the following steps of arranging a plurality of rhombic concrete latticed drainage channels on the slope surface of the collapsible loess slope; drilling holes at the vertex position of each rhombus, and sequentially anchoring prestressed anchor rods and anti-collapse anchor rods in a layered and staggered manner;
the anti-collapse anchor rod comprises a steel wire mesh circular tube, concrete poured in the steel wire mesh circular tube and pseudo-ginseng grey soil for absorbing water in the collapsed loess slope;
the length of the concrete poured into the round steel wire mesh pipe is 1/3 of the total length of the round steel wire mesh pipe; the distance between the pseudo-ginseng gray soil injected into the steel wire mesh round pipe and the slope surface of the collapsible loess slope is 10-15 cm.
2. The coupling structure for collapsible loess slope support as set forth in claim 1, wherein the round steel wire mesh pipe is horizontally inserted into the collapsible loess slope in a manner parallel to a horizontal plane; the prestressed anchor rod is anchored into the collapsible loess slope at an inclination angle of 10-35 degrees downward from the horizontal plane; the steel wire mesh circular pipes and the prestressed anchor rods are arranged in a layered and staggered mode in the vertical direction, the distance between each steel wire mesh circular pipe and each prestressed anchor rod is 2m, and the distance between each steel wire mesh circular pipe and each prestressed anchor rod which are adjacent to each other in the upper layer and the lower layer is 2 m.
3. A coupling structure for collapsible loess slope support as set forth in claim 1, wherein: the steel wire mesh circular pipe is made of steel bars with the diameter of 2.2mm, the distance between grids is 10mm, the diameter of the steel wire mesh circular pipe is 30mm, and 15cm is reserved outside the slope surface of the collapsible loess side slope.
4. The coupling structure for collapsible loess slope support as set forth in claim 1, wherein the concrete lattice drainage channel has a length of 1.6m, a bottom thickness of 0.15m, a clear height of 0.1m, a clear width of 0.2m and a wall thickness of 0.1 m.
5. A coupling structure for collapsible loess slope support as set forth in claim 4, wherein the concrete is cast in situ at the joints of the concrete lattice drainage canals on the slope to a thickness flush with the bottom of the concrete lattice drainage canal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110638517.3A CN113373952A (en) | 2021-06-08 | 2021-06-08 | A connection structure for collapsible loess side slope support |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110638517.3A CN113373952A (en) | 2021-06-08 | 2021-06-08 | A connection structure for collapsible loess side slope support |
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| CN113373952A true CN113373952A (en) | 2021-09-10 |
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| CN202110638517.3A Pending CN113373952A (en) | 2021-06-08 | 2021-06-08 | A connection structure for collapsible loess side slope support |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103790173A (en) * | 2014-03-12 | 2014-05-14 | 中铁第五勘察设计院集团有限公司 | Lime-soil compaction pile and CFG rigid pile combined device and method for disposing collapsible loess |
| CN206189425U (en) * | 2016-11-19 | 2017-05-24 | 安徽建筑大学 | Combined type side slope treatment protector |
| CN106958251A (en) * | 2017-03-03 | 2017-07-18 | 四川大学 | The method of root system coalition framework bar strip ecological protection loess slope |
| CN110629746A (en) * | 2019-10-14 | 2019-12-31 | 辽宁工程技术大学 | A steel pipe composite pile for collapsible loess |
| CN211171997U (en) * | 2019-09-21 | 2020-08-04 | 西安永夷建设工程有限责任公司 | Collapsible loess excavation supporting construction |
| JP2020133136A (en) * | 2019-02-14 | 2020-08-31 | 大成建設株式会社 | Freezing preventive method of slope face |
| CN112376587A (en) * | 2020-11-28 | 2021-02-19 | 辽宁大学 | Method for laying net-hanging spray-anchoring ecological concrete slope protection structure suitable for rock slope |
-
2021
- 2021-06-08 CN CN202110638517.3A patent/CN113373952A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103790173A (en) * | 2014-03-12 | 2014-05-14 | 中铁第五勘察设计院集团有限公司 | Lime-soil compaction pile and CFG rigid pile combined device and method for disposing collapsible loess |
| CN206189425U (en) * | 2016-11-19 | 2017-05-24 | 安徽建筑大学 | Combined type side slope treatment protector |
| CN106958251A (en) * | 2017-03-03 | 2017-07-18 | 四川大学 | The method of root system coalition framework bar strip ecological protection loess slope |
| JP2020133136A (en) * | 2019-02-14 | 2020-08-31 | 大成建設株式会社 | Freezing preventive method of slope face |
| CN211171997U (en) * | 2019-09-21 | 2020-08-04 | 西安永夷建设工程有限责任公司 | Collapsible loess excavation supporting construction |
| CN110629746A (en) * | 2019-10-14 | 2019-12-31 | 辽宁工程技术大学 | A steel pipe composite pile for collapsible loess |
| CN112376587A (en) * | 2020-11-28 | 2021-02-19 | 辽宁大学 | Method for laying net-hanging spray-anchoring ecological concrete slope protection structure suitable for rock slope |
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Application publication date: 20210910 |