CN219951579U - Loess traping hole treatment structure under road - Google Patents
Loess traping hole treatment structure under road Download PDFInfo
- Publication number
- CN219951579U CN219951579U CN202321047176.3U CN202321047176U CN219951579U CN 219951579 U CN219951579 U CN 219951579U CN 202321047176 U CN202321047176 U CN 202321047176U CN 219951579 U CN219951579 U CN 219951579U
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- China
- Prior art keywords
- grouting holes
- road
- loess
- curtain
- holes
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- 238000005056 compaction Methods 0.000 claims abstract description 23
- 239000002002 slurry Substances 0.000 claims abstract description 19
- 230000003014 reinforcing effect Effects 0.000 claims abstract description 7
- 239000011083 cement mortar Substances 0.000 claims abstract description 6
- 238000010276 construction Methods 0.000 abstract description 9
- 239000002689 soil Substances 0.000 description 6
- 239000004568 cement Substances 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 2
- 235000011941 Tilia x europaea Nutrition 0.000 description 2
- 239000004571 lime Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 230000004888 barrier function Effects 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 239000004570 mortar (masonry) Substances 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
Classifications
-
- 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
Landscapes
- Road Paving Structures (AREA)
- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
Abstract
The utility model discloses a loess cave-in disposal structure under a road, belongs to the technical field of road foundation treatment, and solves the problem that the loess cave-in brings potential safety hazards to road engineering construction. The utility model is provided with curtain grouting holes and slurry grouting holes in the loess foundation, the lower ends of the curtain grouting holes and the slurry grouting holes reach loess cave-in holes, the upper ends of the curtain grouting holes and the slurry grouting holes are provided with dynamic compaction layers, and the dynamic compaction layers are provided with reinforcing cushion layers; the curtain grouting holes are arranged at the junction ends of loess cave-in and two sides of a road, cement mortar is poured into the curtain grouting holes, the mud grouting holes are arranged between the curtain grouting holes, and mud is poured into the mud grouting holes. According to the utility model, grouting compaction is carried out on the loess foundation through the curtain grouting holes and the mud grouting holes; the loess foundation is compacted through the dynamic compaction layer, so that the overall mechanical property of the road foundation is greatly improved; through setting up the reinforcing bed course, effectively improved road foundation bearing capacity and waterproof performance.
Description
Technical Field
The utility model belongs to the technical field of road foundation treatment, and particularly relates to a loess cave-in treatment structure under a road.
Background
Loess is a generic name of a yellow sedimentary soil layer with loose structure, macropores and collapsibility, and is a geologic body formed by long-term natural geologic action. Loess cave-in is a unique geological phenomenon which is relatively common in the fourth-period stratum of loess plateau in China, and gradually evolves into a unique geological disaster on the loess plateau.
Along with the rapid development of economic construction pace of China, the construction scale of the infrastructure is rapidly enlarged, and the infrastructure gradually develops to remote areas with traffic conditions behind; meanwhile, under the influence of special geological environment, the construction difficulty of the infrastructure is larger and larger, if the construction is not timely processed, geological disasters such as collapse and the like often occur in the construction or operation stage, and unexpected difficulties and barriers are brought to road engineering construction and safe operation.
How to find a treatment measure for eliminating loess cave-in under the road, and improving the bearing capacity of the loess foundation, and a novel loess cave-in foundation treatment measure for saving cost is an engineering technical problem to be solved in the loess cave-in foundation treatment under the road at present, and is a target for the engineering technicians to struggle.
Disclosure of Invention
The utility model aims to provide a loess cave-in disposal structure under a road, which aims to solve the problem that the loess cave-in brings potential safety hazard to road engineering construction.
The technical scheme of the utility model is as follows: a loess cave-in disposal structure under the road, there are curtain grouting holes and mud grouting holes in the loess foundation, curtain grouting holes and mud grouting holes lower end reach loess cave-in, the upper end of curtain grouting holes and mud grouting holes has dynamic compaction layer, there is reinforcing cushion layer on the dynamic compaction layer; the curtain grouting holes are arranged at the junction ends of loess cave-in and two sides of a road, cement mortar is poured into the curtain grouting holes, the mud grouting holes are arranged between the curtain grouting holes, and mud is poured into the mud grouting holes.
As a further improvement of the utility model, the arrangement density of curtain grouting holes is larger than that of slurry grouting holes.
As a further improvement of the present utility model, the lateral arrangement range of the slurry injection holes is within the toe range of the road embankment and is not smaller than the road width of the road embankment.
As a further improvement of the utility model, the transverse arrangement range of the curtain grouting holes is that the slope feet of the road embankment are arranged outwards, and the boundary of the arrangement range of the curtain grouting holes is not less than 3m away from the slope feet of the road embankment.
According to the loess cave-in disposal structure under the road, under the aims of filling loess cave-in and increasing the bearing capacity of the foundation and saving cost, filling of the loess cave-in and compaction of the loess foundation in the stress range of the road are achieved through grouting holes of the curtain grouting holes, grouting of the slurry grouting holes, the dynamic compaction layer and the reinforced cushion layer, foundation collapsibility can be effectively eliminated, the aperture ratio of soil mass of the loess foundation is greatly reduced, and the bearing capacity of the foundation is improved.
Compared with the prior art, the utility model has the following advantages:
according to the utility model, cement mortar is used for grouting curtain grouting holes, two ends of loess cave-in holes in a road treatment range are plugged, then the mud grouting holes are arranged in the road range, loess cave-in holes in the road range are filled, and grouting compaction is carried out on loess cave-in holes in the road range. Grouting compaction is carried out on the loess foundation through the curtain grouting holes and the slurry grouting holes, and the loess foundation is compacted through the dynamic compaction layer, so that the overall mechanical property of the road foundation is greatly improved. The utility model is provided with the reinforced cushion layer, and effectively improves the bearing capacity and the waterproof performance of the road foundation. The utility model has simple structure, safety, reliability, convenient construction method, full utilization of resources and remarkable comprehensive technical, economic and social benefits.
Drawings
Fig. 1 is a schematic structural view of the present utility model.
In the figure: 1-loess cave-in; 2-loess foundation; 3-natural ground; 4-curtain grouting holes; 5-slurry grouting holes; 6-dynamic compaction layer; 7-reinforcing the cushion layer; 8-road embankment.
Detailed Description
The present utility model will be described in detail with reference to the accompanying drawings.
As shown in fig. 1, in the loess cave-in disposal structure under the road, a curtain grouting hole 4 and a slurry grouting hole 5 are arranged in a loess foundation 2, the lower ends of the curtain grouting hole 4 and the slurry grouting hole 5 reach the loess cave-in 1, a dynamic compaction layer 6 is arranged at the upper ends of the curtain grouting hole 4 and the slurry grouting hole 5, a reinforcing cushion layer 7 is arranged on the dynamic compaction layer 6, and the upper surface of the reinforcing cushion layer 7 is flush with a natural ground 3; the curtain grouting holes 4 are arranged at the junction ends of the loess cave-in 1 and two sides of the road, cement mortar is poured into the curtain grouting holes 4, the mud grouting holes 5 are arranged between the curtain grouting holes 4 at two ends, and mud is poured into the mud grouting holes 5.
The arrangement density of curtain grouting holes 4 is greater than that of mud grouting holes 5.
The lateral arrangement range of the mud grouting holes 5 is within the toe range of the road embankment 8 and is not smaller than the road width (W) of the road embankment 8.
The transverse arrangement range of the curtain grouting holes 4 is that the slope feet of the road embankments 8 are arranged outwards, and the boundary of the arrangement range of the curtain grouting holes 4 is not less than 3m away from the slope feet of the road embankments 8.
The curtain grouting holes 4 and the mud grouting holes 5 are dug from the natural ground 3 to the loess cave-in 1. The curtain grouting holes 4 and the mud grouting holes 5 are arranged in a regular triangle, the aperture is 0.1-0.2 m, the hole spacing of the curtain grouting holes 4 is 2-4 m, and the hole spacing of the mud grouting holes 5 is 4-8 m. The filling material of the curtain grouting holes 4 adopts cement mortar, the proportion of water, cement and mortar is 0.6:0.3:0.7, the grouting pressure is 0.2-0.5 MPa, and the two ends of loess cave-in 1 in the road subgrade treatment range are plugged. After the filling material of the curtain grouting holes 4 reaches the design strength, grouting is carried out on the slurry grouting holes 5, the filling material adopts slurry, the proportion of water, sand and clay is 0.6:0.2:0.8, the grouting pressure is 0.2-0.5 MPa, and the loess cave-in 1 in the range of 8 toe of the road embankment is filled compactly.
Digging 0.3-0.5 m under the natural ground 3, dynamic compaction is carried out on the loess foundation 2, the tamping points of the dynamic compaction layer 6 are arranged in a regular triangle, the tamping energy is 1000-6000 KJ, the transverse disposal range of the dynamic compaction layer 6 is not less than 3m outside the slope feet of the road embankment 8, and the arrangement range of the dynamic compaction layer is larger than that of the curtain grouting holes 4. Grouting in the curtain grouting holes 4 and the slurry grouting holes 5 is matched with the dynamic compaction layer 6 to compact the loess foundation 2.
The reinforcing cushion layer 7 is positioned on the dynamic compaction layer 6, cement stabilized soil and lime stabilized soil are adopted for backfilling, the proportion of the cement stabilized soil and the lime stabilized soil is 0.08:0.92, the thickness is 0.3-0.5 m, and the transverse treatment range is consistent with the dynamic compaction layer 6. The reinforced cushion layer 7 effectively enhances the bearing capacity and the waterproof performance of the road foundation.
Claims (4)
1. Loess traping cave in under road is dealt with structure, its characterized in that: a curtain grouting hole (4) and a slurry grouting hole (5) are formed in the loess foundation (2), the lower ends of the curtain grouting hole (4) and the slurry grouting hole (5) reach the loess cave-in (1), a dynamic compaction layer (6) is arranged at the upper ends of the curtain grouting hole (4) and the slurry grouting hole (5), and a reinforcing cushion layer (7) is arranged on the dynamic compaction layer (6); the curtain grouting holes (4) are arranged at the junction ends of the loess cave-in holes (1) and two sides of a road, cement mortar is poured into the curtain grouting holes (4), the mud grouting holes (5) are arranged between the curtain grouting holes (4), and mud is poured into the mud grouting holes (5).
2. The under-road loess cave-in disposal structure as set forth in claim 1, wherein: the arrangement density of the curtain grouting holes (4) is larger than that of the slurry grouting holes (5).
3. The under-road loess cave-in disposal structure as set forth in claim 1 or 2, wherein: the transverse arrangement range of the slurry grouting holes (5) is within the range of the slope feet of the road embankment (8) and is not smaller than the width of the road embankment (8).
4. A loess cave-in disposal structure under a road as set forth in claim 3, wherein: the transverse arrangement range of the curtain grouting holes (4) is that the slope feet of the road embankment (8) are arranged outwards, and the boundary of the arrangement range of the curtain grouting holes (4) is not smaller than 3m from the slope feet of the road embankment (8).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321047176.3U CN219951579U (en) | 2023-05-05 | 2023-05-05 | Loess traping hole treatment structure under road |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321047176.3U CN219951579U (en) | 2023-05-05 | 2023-05-05 | Loess traping hole treatment structure under road |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219951579U true CN219951579U (en) | 2023-11-03 |
Family
ID=88536631
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321047176.3U Active CN219951579U (en) | 2023-05-05 | 2023-05-05 | Loess traping hole treatment structure under road |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219951579U (en) |
-
2023
- 2023-05-05 CN CN202321047176.3U patent/CN219951579U/en active Active
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| GR01 | Patent grant | ||
| GR01 | Patent grant |