CN213952189U - Deep collapsible loess water injection humidification dynamic compaction reinforced structure - Google Patents
Deep collapsible loess water injection humidification dynamic compaction reinforced structure Download PDFInfo
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- CN213952189U CN213952189U CN202022747317.5U CN202022747317U CN213952189U CN 213952189 U CN213952189 U CN 213952189U CN 202022747317 U CN202022747317 U CN 202022747317U CN 213952189 U CN213952189 U CN 213952189U
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Abstract
The utility model relates to a deep collapsible loess water injection humidifying dynamic compaction reinforcing structure, which comprises a collapsible loess layer to be treated, a non-collapsible loess layer, a water injection hole and a water injection humidifying system; the collapsible loess layer is positioned above the non-collapsible loess layer, and water injection holes are arranged in the collapsible loess layer; the depth of the water injection hole is smaller than the thickness of the collapsible loess layer; the water injection humidifying system comprises an assembled water injection pipe, a water distribution pipe, a water delivery pipe and a booster water pump; the assembled water injection pipe is placed on the axis of the water injection hole, and a hole filling material is filled in a space formed by the assembled water injection pipe and the water injection hole. The utility model has the advantages that: the utility model discloses well pin-connected panel water injection pipe is formed by splicing in proper order through the screwed joint pipe by a plurality of water injection long tube and water injection nozzle stub, can adapt to the collapsible loess foundation of different treatment depth according to the engineering requirement, effectively eliminates the collapsible nature on dark loess layer, and the pipe wall evenly is covered with the hole of permeating water simultaneously and can make the infiltration penetration rate fast that soaks.
Description
Technical Field
The utility model belongs to the technical field of civil engineering ground is handled, concretely relates to deep collapsible loess water injection humidification dynamic compaction reinforced structure.
Background
Collapsible loess is widely distributed in northwest, northeast, china and eastern China. In recent years, with the advance of the strategy of national 'western big development', a large amount of engineering construction activities are carried out on vast loess plateau, so that the limited land resource utilization situation is more severe, the deep collapsible loess area is developed and utilized in a large area, the collapsible characteristic of the collapsible loess foundation can bring different degrees of harm to the structure, the structure is greatly settled, cracked and inclined, and the safety and the use of the structure are even seriously affected. Therefore, construction is carried out on a deep collapsible loess field, and comprehensive measures mainly based on foundation treatment are taken according to the importance of a building, the size of the possibility that the foundation is soaked by water and the strictness of limitation on uneven settlement during use, so that damage of loess collapse to a building foundation or a roadbed foundation is prevented.
The purpose of the collapsible loess foundation treatment is to improve the property and structure of soil, reduce the water permeability and compressibility of the soil, control the occurrence of collapsible property of the soil and partially or totally eliminate the collapsible property of the soil. Common methods for treating collapsible loess foundations include: the method comprises the following steps of plain soil pile compaction, heavy hammer tamping and dynamic compaction, lime soil or plain soil cushion layer, water injection humidification treatment and the like. The heavy hammer tamping and dynamic compaction method has the advantages of simple process, economy and high efficiency, and has obvious effect in reinforcing saturated soil and collapsible loess with porous grains and natural water content close to the optimal water content, but because the ultra-thick self-weight collapsible loess has low natural water content and too large thickness, the dynamic compaction reinforcing depth and the processing effect can be obviously reduced by only adopting dynamic compaction processing. Therefore, when engineering construction is carried out on the deep collapsible loess foundation, water injection humidification treatment must be carried out on the foundation to eliminate the collapsible property of the loess and improve the bearing capacity of the foundation.
Therefore, the development of a deep collapsible loess water injection humidifying dynamic compaction reinforcing structure which is simple to implement, good in water injection effect and high in foundation treatment quality to improve the bearing capacity of the collapsible loess foundation to the maximum extent becomes a technical problem to be solved by technical personnel in the field.
SUMMERY OF THE UTILITY MODEL
The utility model aims at overcoming the not enough among the prior art, provide one kind and implement simply, the high deep collapsible loess water injection humidification dynamic compaction reinforced structure of ground treatment quality, and can solve the weight tamp and the dynamic compaction method poor, seriously restrict the problem and not enough of efficiency of construction of treatment that exist in deep collapsible loess ground is handled.
The deep collapsible loess water-injection humidifying dynamic compaction reinforcing structure comprises a collapsible loess layer to be treated, a non-collapsible loess layer, water injection holes and a water-injection humidifying system; the collapsible loess layer is positioned above the non-collapsible loess layer, and water injection holes are arranged in the collapsible loess layer; the depth of the water injection hole is smaller than the thickness of the collapsible loess layer; the water injection humidifying system comprises an assembled water injection pipe, a water distribution pipe, a water delivery pipe and a booster water pump; the assembled water injection pipe is placed on the axis of the water injection hole, and a hole filling material is filled in a space formed by the assembled water injection pipe and the water injection hole; the assembly type water injection pipe is formed by splicing a plurality of long water injection pipes and short water injection pipes through threaded joint pipes and is connected with a water injection bottom pipe with a closed bottom end to form a whole; the long water injection pipe and the short water injection pipe are provided with water spraying holes at intervals along the pipe depth, and the diameter of each water spraying hole is 5-10 mm; the split mounting type water injection pipe is connected with the water distribution pipe through a threaded connector pipe, the water distribution pipe is connected with a water pipe, and the water pipe is connected with a booster water pump.
Preferably, the method comprises the following steps: the water injection hole is formed through a steel casing wall.
Preferably, the method comprises the following steps: every four adjacent water injection holes are distributed in a square shape, and every two rows of water injection holes are communicated with one group of water conveying pipes and a pressurizing water pump along the transverse direction or the longitudinal direction.
Preferably, the method comprises the following steps: and the outside of the assembled water injection pipe is wrapped with geotextile.
The utility model has the advantages that:
(1) the utility model discloses well pin-connected panel water injection pipe is formed by splicing in proper order through the screwed joint pipe by a plurality of water injection long tube and water injection nozzle stub, can adapt to the collapsible loess foundation of different treatment depth according to the engineering requirement, effectively eliminates the collapsible nature on dark loess layer, and the pipe wall evenly is covered with the hole of permeating water simultaneously and can make the infiltration penetration rate fast, can shorten the construction cycle of conventional water injection moisturizing method.
(2) The utility model discloses fill the grit material that permeability is good in the water injection hole, can provide good drainage channel for the water injection humidification of collapsible loess, can form with loess on every side simultaneously and have the compound ground of certain intensity, can get into the dynamic compaction equipment and other personnel of dynamic compaction construction, mechanical walking, construction provide the powerful support that bears after the water injection humidification.
(3) After the collapsible settlement of the collapsible loess foundation meets the requirement, the soil body on the upper layer of the foundation is further compacted and reinforced by a dynamic compaction method, so that the bearing capacity of the soil body of the foundation can be obviously improved, and the load requirement of the upper building can be met.
Drawings
FIG. 1 is a sectional view of the deep collapsible loess water-injection humidifying system of the present invention;
FIG. 2 is a plan view of the deep collapsible loess water-injection humidifying system of the present invention;
FIG. 3 is a schematic view of the structure of the middle assembled water injection pipe of the present invention;
fig. 4 is the schematic diagram of the deep collapsible loess water injection humidifying dynamic compaction reinforcing structure of the utility model.
Description of reference numerals: 1-collapsible loess layer; 2-non collapsible loess layer; 3-water injection hole; 4-assembling type water injection pipe; 5-a water distribution pipe; 6-water conveying pipe; 7-a threaded joint pipe; 8-a booster water pump; 9-long water injection pipe; 10-water injection short pipe; 11-water spray holes; 12-geotextile; 13-a steel casing; 14-a pore-filling material; 15-weight dropper; 16-water injection bottom pipe.
Detailed Description
The present invention will be further described with reference to the following examples. The following description of the embodiments is merely provided to aid in understanding the invention. It should be noted that, for those skilled in the art, without departing from the principle of the present invention, the present invention can be further modified and modified, and such modifications and modifications also fall within the protection scope of the appended claims.
As shown in fig. 1-4, the deep collapsible loess water injection humidifying dynamic compaction reinforcing structure comprises a collapsible loess layer 1 to be treated, a non-collapsible loess layer 2, a water injection hole 3 and a water injection humidifying system; and (3) injecting water into the collapsible loess layer 1 by using the water injection humidifying system for humidifying, removing the water injection humidifying system after the collapsible loess layer 1 is soaked in water and is settled stably by self-weight, and performing dynamic compaction treatment on the humidified collapsible loess layer 1 by using a heavy hammer 15.
The water injection holes 3 are formed by adopting a vibrating or hammering steel casing 13, and the depth of each water injection hole 3 is slightly smaller than the thickness of the collapsible loess layer 1; and the steel casing 13 is pulled out after the water injection humidifying system is installed.
The water injection humidifying system comprises an assembled water injection pipe 4, a water distribution pipe 5, a water delivery pipe 6 and a booster water pump 8; the assembled water injection pipe 4 is placed on the axis of the water injection hole 3, and a filling hole material 14 is filled in a space formed by the assembled water injection pipe 4 and the water injection hole 3; the assembly type water injection pipe 4 is formed by sequentially splicing a plurality of long water injection pipes 9 and short water injection pipes 10 through threaded joint pipes 7 and is connected with a water injection bottom pipe 16 with a closed bottom end to form a whole; the long water injection pipe 9 and the short water injection pipe 10 are provided with water spray holes 11 at intervals along the pipe depth, and the diameter of each water spray hole 11 is 5-10 mm; the assembly type water injection pipes 4 are connected with the water distribution pipes 5 through threaded connector pipes 7, the water distribution pipes 5 are connected with the water delivery pipes 6, the water delivery pipes 6 are connected with the booster water pump 8, water is sequentially injected into the assembly type water injection pipes 4 through the water delivery pipes 8 through the booster water pump 8, and water injection humidification on the collapsible loess layer 1 is achieved.
The water injection holes 3 are formed through the wall protection of the steel protection cylinder 13, and the design parameters of the water injection holes 3 are comprehensively determined according to the on-site drilling deep pre-soaking test and the requirements of the treatment area, the water source condition and the construction period.
Every four adjacent water injection holes 3 are distributed in a square shape, and every two rows of water injection holes 3 are subjected to water injection humidification through a group of water conveying pipes 6 and a pressurizing water pump 8 along the transverse direction or the longitudinal direction.
The outside of the assembled water injection pipe 4 is wrapped with the geotextile 12, so that the water spray holes 11 of the assembled water injection pipe 4 are prevented from being blocked.
The pore-filling material 14 is sand-stone material with good permeability, and can be selected from broken stone, construction waste or sand-gravel, or a mixture of the materials.
After water injection and humidification are stable, the collapsible loess layer 1 is dynamically compacted by a heavy hammer 15, the unit tamping energy is comprehensively considered according to the properties and the structure types of the foundation soil, the load size and the required treatment depth and is determined by field trial tamping, the tamping times are 2-3 times, and finally, the low-energy full tamping is performed.
Claims (4)
1. A deep collapsible loess water injection humidifying dynamic compaction reinforcing structure is characterized by comprising a collapsible loess layer (1) to be treated, a non-collapsible loess layer (2), water injection holes (3) and a water injection humidifying system; the collapsible loess layer (1) is positioned above the non-collapsible loess layer (2), and water injection holes (3) are arranged in the collapsible loess layer (1); the depth of the water injection hole (3) is smaller than the thickness of the collapsible loess layer (1); the water injection humidifying system comprises an assembled water injection pipe (4), a water distribution pipe (5), a water delivery pipe (6) and a booster water pump (8); the assembled water injection pipe (4) is placed on the axis of the water injection hole (3), and a space formed by the assembled water injection pipe (4) and the water injection hole (3) is filled with a hole filling material (14); the assembled water injection pipe (4) is formed by splicing a plurality of long water injection pipes (9) and short water injection pipes (10) through threaded joint pipes (7) and is connected with a water injection bottom pipe (16) with a closed bottom end to form a whole; the long water injection pipe (9) and the short water injection pipe (10) are provided with water spray holes (11) at intervals along the pipe depth, and the diameter of each water spray hole (11) is 5-10 mm; the assembled water injection pipe (4) is connected with the water distribution pipe (5) through a threaded connector pipe (7), the water distribution pipe (5) is connected with the water pipe (6), and the water pipe (6) is connected with the booster pump (8).
2. The deep collapsible loess water injection humidifying dynamic compaction reinforcing structure according to claim 1, wherein the water injection holes (3) are formed by a steel casing (13) and a retaining wall.
3. The deep collapsible loess water injection humidifying dynamic compaction reinforcing structure according to claim 1, wherein four adjacent water injection holes (3) are distributed in a square shape, and every two rows of water injection holes (3) in the transverse direction or the longitudinal direction of the water injection holes (3) are communicated with one group of water delivery pipes (6) and a booster pump (8).
4. The deep collapsible loess water injection humidifying dynamic compaction reinforcing structure according to claim 1, wherein the assembled water injection pipe (4) is externally wrapped with geotextile (12).
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| Application Number | Priority Date | Filing Date | Title |
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| CN202022747317.5U CN213952189U (en) | 2020-11-24 | 2020-11-24 | Deep collapsible loess water injection humidification dynamic compaction reinforced structure |
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| CN202022747317.5U CN213952189U (en) | 2020-11-24 | 2020-11-24 | Deep collapsible loess water injection humidification dynamic compaction reinforced structure |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117647443A (en) * | 2024-01-19 | 2024-03-05 | 中国电建集团西北勘测设计研究院有限公司 | Loess hole inner collapse coefficient testing device and method |
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2020
- 2020-11-24 CN CN202022747317.5U patent/CN213952189U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117647443A (en) * | 2024-01-19 | 2024-03-05 | 中国电建集团西北勘测设计研究院有限公司 | Loess hole inner collapse coefficient testing device and method |
| CN117647443B (en) * | 2024-01-19 | 2024-04-12 | 中国电建集团西北勘测设计研究院有限公司 | Loess hole inner collapse coefficient testing device and method |
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