CN215856991U - Foam concrete backfilling embankment in karst area - Google Patents
Foam concrete backfilling embankment in karst area Download PDFInfo
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- CN215856991U CN215856991U CN202121527789.8U CN202121527789U CN215856991U CN 215856991 U CN215856991 U CN 215856991U CN 202121527789 U CN202121527789 U CN 202121527789U CN 215856991 U CN215856991 U CN 215856991U
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- 239000011381 foam concrete Substances 0.000 title claims abstract description 92
- 239000004567 concrete Substances 0.000 claims abstract description 53
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 36
- 238000007789 sealing Methods 0.000 claims abstract description 26
- 238000005086 pumping Methods 0.000 claims abstract description 21
- 238000000034 method Methods 0.000 claims abstract description 7
- 229910000831 Steel Inorganic materials 0.000 claims description 91
- 239000010959 steel Substances 0.000 claims description 91
- 238000004873 anchoring Methods 0.000 claims description 8
- 239000011178 precast concrete Substances 0.000 claims description 6
- 239000011148 porous material Substances 0.000 claims description 5
- 238000009423 ventilation Methods 0.000 claims description 5
- 238000009434 installation Methods 0.000 claims description 3
- 239000002699 waste material Substances 0.000 abstract description 4
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 239000000463 material Substances 0.000 abstract description 2
- 239000004575 stone Substances 0.000 abstract description 2
- 238000010276 construction Methods 0.000 description 7
- 235000019994 cava Nutrition 0.000 description 3
- 238000011161 development Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000011435 rock Substances 0.000 description 2
- 229910001294 Reinforcing steel Inorganic materials 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
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Abstract
The utility model relates to a foam concrete backfilling embankment in a karst region, which comprises a large-span karst cave prefabricated assembled column supporting top recharging foam concrete system, an underground water-free funnel type deep water falling cave top hanging air bag bottom mold sealing foam concrete recharging system, a funnel type water falling cave pumping hanging air bag bottom mold sealing concrete bottom and then pouring foam concrete system, a roadbed prefabricated cover plate sealing recharging foam concrete system and a cutting prefabricated assembled cover plate sealing recharging foam concrete system. The utility model has the beneficial effects that: aiming at a large-span karst cave with a large top plate thickness, the prefabricated concrete column and the temporarily lapped cast-in-place prefabricated foam concrete template are adopted, so that the method is suitable for the karst cave with a large height, and the waste of concrete poured in the karst cave is reduced; aiming at the funnel-shaped water falling hole, a deformable bottom template is formed by adopting a top hanging air bag bottom die structure, and foam concrete is poured, so that the funnel-shaped water falling hole has good adaptability and stability, and the waste of stone materials is reduced.
Description
Technical Field
The utility model relates to a concrete backfilling embankment, belongs to the field of road engineering, and is particularly suitable for the construction of a foam concrete backfilling embankment subgrade in a karst area.
Background
Along with the rapid development of highway construction in China, highway subgrades passing through karst development areas are increasing in recent years. The karst cave has the characteristics of concealment and complexity, the existing exploration means cannot effectively and comprehensively disclose the development characteristics of the karst cave, and meanwhile, the karst processing method at the present stage is single, the applicability is poor, and the construction quality cannot be guaranteed.
Therefore, aiming at the problems in the actual construction engineering of the backfill embankment in the karst region, the foam concrete backfill embankment which can adapt to various karst working conditions, is high in construction efficiency and safety needs to be developed.
SUMMERY OF THE UTILITY MODEL
The utility model aims to overcome the defects in the prior art and provide a foam concrete backfilled embankment in a karst region.
The foam concrete backfilling embankment in the karst region comprises a large-span karst cave prefabricated assembled column supporting top recharging foam concrete system, an underground water-free funnel type deep water-falling cave top hanging air bag bottom mold sealing foam concrete recharging system, a funnel type water-falling cave pumping hanging air bag bottom mold sealing concrete bottom and then pouring foam concrete system, a roadbed prefabricated cover plate sealing recharging foam concrete system and a cutting prefabricated assembled cover plate sealing recharging foam concrete system;
the large-span karst cave prefabricated assembly type column top back-filling foam concrete system comprises an upper prefabricated concrete column and a lower prefabricated concrete column, wherein the upper prefabricated concrete column is supported and fixed by a steel bar support, a steel strand and an anchoring steel bar, the steel bar support is provided with a steel strand hole, the lower prefabricated concrete column is fixed on a column positioning groove, a gap is filled with foam concrete, and foam concrete is poured in a prefabricated foam concrete template between the upper prefabricated concrete column and the lower prefabricated concrete column to form an integral karst cave inner supporting column;
the foam concrete recharging system comprises a top hanging air bag bottom die structure, wherein the top hanging air bag bottom die structure consists of a top supporting steel pipe, an upper steel plate, a rubber air bag, a bottom steel plate and a vertical steel pipe; the top supporting steel pipe, the vertical steel pipe, the upper steel plate, the rubber air bag and the bottom steel plate are sequentially welded and connected from top to bottom to form a whole; foam concrete is poured back above the upper steel plate;
the funnel-shaped water falling hole pumping hanging air bag bottom die is adopted to fill a foam concrete system after closing the concrete bottom and adopting a structure comprising a top hanging air bag bottom die and a pumping pipe, and the pumping pipe extends into underground water of the water falling hole;
the roadbed prefabricated cover plate closed recharging foam concrete system comprises embedded bolts, nuts and prefabricated cover plates; two ends of a prefabricated cover plate of the roadbed are fixed above the common concrete through embedded bolts and nuts, and second foam concrete is arranged below the common concrete;
the cutting prefabricated assembly type cover plate sealing recharge foam concrete system comprises a cutting standard block prefabricated cover plate, a cutting bottom prefabricated cover plate and a cutting upper portion prefabricated cover plate, wherein the cutting standard block prefabricated cover plate is arranged between the cutting bottom prefabricated cover plate and the cutting upper portion prefabricated cover plate, the cutting bottom prefabricated cover plate and the cutting upper portion prefabricated cover plate are fixed through embedded bolts and nuts, and grouting holes and air vents are formed in the cutting upper portion prefabricated cover plate.
Preferably, the method comprises the following steps: steel bar supports are arranged on the outer sides of the upper precast concrete strut and the lower precast concrete strut, steel strands sequentially penetrate through a steel strand pore passage at the top of the steel bar support and a strut steel strand fixing lug hole at the lower part of the upper precast concrete strut, and the outer ends of the steel strands are respectively fixed on anchoring steel bars around the steel bar supports; and a prefabricated foam concrete template is arranged between the upper prefabricated concrete pillar and the lower prefabricated concrete pillar, and foam concrete is poured in a template groove of the prefabricated foam concrete template.
Preferably, the method comprises the following steps: the two top support steel pipes are welded together in a crossed mode, the ventilation hole channel is reserved at the joint of the top support steel pipes, the vertical steel pipe is welded to the lower portion of the top support steel pipe, the upper steel plate and the bottom steel plate are welded to the bottom of the vertical steel pipe, a rubber air bag is arranged between the upper steel plate and the bottom steel plate, and the rubber air bag is provided with an air inlet hole.
Preferably, the method comprises the following steps: the lap joint notch of the cover plate of the prefabricated cover plate is fixedly connected with the lower splicing notch of the roadbed through the embedded bolts and the nuts, and the prefabricated screw holes and the nut mounting grooves are formed in the positions, corresponding to the embedded bolts, of two ends of the prefabricated cover plate.
Preferably, the method comprises the following steps: splicing convex grooves and splicing grooves are respectively formed in two ends of the cutting standard block prefabricated cover plate; the cover plate lap joint notch of the prefabricated cover plate at the bottom of the cutting and the cover plate lap joint notch of the prefabricated cover plate at the upper part of the cutting are fixedly connected with the lower splicing notch of the cutting through the embedded bolts and the nuts, and the prefabricated cover plate at the bottom of the cutting and the prefabricated cover plate at the upper part of the cutting are provided with prefabricated screw holes and nut mounting grooves corresponding to the embedded bolts.
The utility model has the beneficial effects that:
(1) aiming at the large-span karst cave with the large thickness of the top plate, the prefabricated concrete column and the temporary lapped cast-in-place prefabricated foam concrete template are adopted, so that the karst cave with the large height can be suitable for being used, and the waste of concrete poured in the karst cave is reduced.
(2) Aiming at the funnel-shaped water falling hole, a deformable bottom template is formed by adopting a top hanging air bag bottom die structure, and foam concrete is poured, so that the funnel-shaped water falling hole has good adaptability and stability, and the waste of stone materials is reduced.
(3) To taking off lid type solution cavity, through setting up overlap joint notch and prefabricated screw at prefabricated apron limit, adopt notch overlap joint and bolt anchoring's mode for prefabricated apron forms complete whole with the rock mass, has good wholeness and steadiness.
(4) To cutting solution cavity, through setting up overlap joint notch and prefabricated screw at prefabricated apron limit, adopt notch overlap joint and bolt anchor's mode to fix prefabricated apron in upper portion and the prefabricated apron in bottom, the prefabricated apron in upper portion is provided with injected hole and air vent simultaneously, has guaranteed the steadiness of prefabricated assembled apron.
Drawings
FIG. 1 is a schematic view of a large span prefabricated pillar backfill foam concrete structure;
FIG. 2 is a schematic view of a closed foam concrete structure with a top hanging air bag and a bottom die;
FIG. 3 is a schematic diagram of different types of karst cave processing modes;
FIG. 4 is a schematic view of a funnel type karst top hanging air bag bottom mold closed foam concrete recharging technique;
FIG. 5 is a schematic view of a uncovering-type cavern treatment;
fig. 6 is a schematic diagram of a prefabricated cover plate structure of a roadbed;
FIG. 7 is a schematic view of a cutting prefabricated cover plate structure.
Description of reference numerals: 1. the concrete structure comprises an upper prefabricated concrete pillar, 2 lower prefabricated concrete pillars, 3 reinforcing steel bar supports, 4 prefabricated foam concrete templates, 5 pillar positioning grooves, 6 steel strands, 7 steel strand pore channels, 8 pillar steel strand fixing lug holes, 9 template groove, 10 anchoring steel bars, 11 top supporting steel pipes, 12 upper steel plates, 13 rubber air bags, 14 bottom steel plates, 15 ventilation pore channels, 16 vertical steel pipes, 17 uncovering type karst caves, 18 large-span unfilled karst caves, 19 downholes, 20 funnel type karst caves, 21 first foam concrete, 22 micro-expansion concrete, 23 roadbed, 24 drainage ditch, 25 air inlet holes, 26 underground water, 27 water pumping pipe, 28 second foam concrete, 29 common concrete, 30 road center line, 31 embedded bolts, 32 lower splicing notch, 33 screw cap, 30 road center line, 31 embedded bolts, 32 embedded bolt, 33 screw cap, and concrete, The prefabricated cover plate comprises a prefabricated cover plate 34, a cover plate lap joint notch 35, a nut mounting groove 36, a prefabricated screw hole 37, a grouting hole 38, a vent hole 39, a splicing convex groove 40, a splicing groove 41, a cutting standard prefabricated cover plate 42, a cutting bottom prefabricated cover plate 43 and a cutting upper prefabricated cover plate 44.
Detailed Description
The present invention will be further described with reference to the following examples. The following examples are set forth merely to aid in the understanding of the utility model. It should be noted that, for those skilled in the art, it is possible to make various improvements and modifications to the present invention without departing from the principle of the present invention, and those improvements and modifications also fall within the scope of the claims of the present invention.
As an embodiment, aiming at a large-span unfilled cavern 18, a funnel-shaped cavern 20, a water-falling cavern 19 and a uncovering-type cavern 17, the embodiment of the application provides an improved foam concrete backfilling embankment in a karst region, which comprises a large-span cavern prefabricated assembled column-supported recharging foam concrete system, an underground water-free funnel-shaped deep-water-falling cavern top suspended air bag bottom mold sealing foam concrete recharging system, a funnel-shaped water-falling cavern pumped water suspended air bag bottom mold sealing concrete bottom and then pouring foam concrete system, a roadbed prefabricated cover plate sealing recharging foam concrete system and a cutting prefabricated assembled cover plate sealing recharging foam concrete system. One side of the roadbed 23 is provided with a drainage ditch 24.
A large-span karst cave prefabricated assembly type column top-supporting recharging foam concrete system comprises an upper prefabricated concrete column 1 and a lower prefabricated concrete column 2, wherein the upper prefabricated concrete column is supported and fixed through a steel bar support 3, a steel strand 6 and an anchoring steel bar 10, the steel bar support 3 is provided with a steel strand hole 7, the lower prefabricated concrete column is fixed in a column positioning groove 5 through foam concrete, and foam concrete is poured into a template groove 9 in a prefabricated foam concrete template 4 on site temporarily to form an integral karst cave inner supporting column.
The foam concrete recharging system comprises a top hanging air bag bottom die structure, two top supporting steel pipes 11 are welded respectively, a ventilation hole 15 is reserved at the joint of the steel pipes, then a vertical steel pipe 16 is welded, an upper steel plate 12 and a bottom steel plate 14 are welded on the vertical steel pipe, a rubber air bag 13 is arranged between the steel plates, gas is pumped in through an air inlet, and the rubber air bag is fully expanded to form a flexible bottom die attached to the wall of a hole; then, foam concrete is poured back into the water falling hole, and the foam concrete is gradually poured back to the periphery from the upper steel plate 12, so that the stability of the rubber air bag is kept; and during the curing of the foam concrete, the stability of the rubber air bag is kept, and after the foam concrete reaches a certain strength, the air inlet pipe of the rubber air bag is pulled out, and the roadbed is further paved.
A funnel-shaped water falling hole water pumping hanging air bag bottom die is filled with a foam concrete system after closing concrete bottom, the funnel-shaped water falling hole water pumping hanging air bag bottom die comprises a top hanging air bag bottom die structure and a water pumping pipe 27, two top supporting steel pipes 11 are respectively welded, a ventilation hole passage 15 is reserved at the joint of the steel pipes, then a vertical steel pipe 16 is welded, an upper steel plate 12 and a bottom steel plate 14 are welded on the vertical steel pipe, and a rubber air bag 13 is arranged between the steel plates; the water pumping pipe 27 extends into the underground water 26 in the downpipe hole 19; during construction, firstly, the water flow supply on the ground is cut off and drained, and then the water pumping pipe 27 is lowered to perform precipitation in the tunnel; if no underground water is laterally supplied, the water pumping pipeline is withdrawn, and a bottom die structure of the top hanging air bag is placed downwards; if lateral supply exists underground, water pumping in the hole is kept, the top hanging air bag bottom die structure is placed downwards, after the installation is completed, quick-setting concrete is rapidly refilled to the upper steel plate 12, after a certain strength is achieved, the water pumping pipe is cut off, the water pumping port is covered by the cover plate, the quick-setting concrete is poured, after a certain thickness is achieved, foam concrete is poured for maintenance, and the roadbed is further paved.
The roadbed prefabricated cover plate is used for sealing and recharging a foam concrete system, two ends of a roadbed prefabricated cover plate 34 are fixed above common concrete 29 through embedded bolts 31 and nuts 33, and second foam concrete 28 is arranged below the common concrete 29; the cover plate lap joint notch 35 of the prefabricated cover plate 34 is fixedly connected with the lower splicing notch 32 of the roadbed through the embedded bolts 31 and the nuts 33, and prefabricated screw holes 37 and nut mounting grooves 36 are formed in the positions, corresponding to the embedded bolts 31, of two ends of the prefabricated cover plate 34. The uncovering type karst cave is characterized in that lap joint notches are dug in advance at the roadbed plane, grooves are formed in the positions of the prefabricated screw holes 37, prefabricated bolts are installed, and the micro-expansion concrete 22 is poured back; meanwhile, foam concrete is filled into the hole, then grouting treatment is carried out, after the pouring is finished, the prefabricated cover plate 34 is hung, the bolt is installed, and the concrete is poured back into the nut installation groove to form a complete whole.
The cutting prefabricated assembly type cover plate is used for sealing and recharging a foam concrete system, a cutting standard block prefabricated cover plate 42 is arranged between a cutting bottom prefabricated cover plate 43 and a cutting upper prefabricated cover plate 44, the ends of the cutting bottom prefabricated cover plate 43 and the cutting upper prefabricated cover plate 44 are fixed through embedded bolts 31 and nuts 33, and the cutting upper prefabricated cover plate 44 is provided with grouting holes 38 and vent holes 39; splicing convex grooves 40 and splicing concave grooves 41 are respectively arranged at two ends of the cutting standard block prefabricated cover plate 42; the cover plate lap joint notch 35 of the cutting bottom prefabricated cover plate 43 and the cutting upper prefabricated cover plate 44 is fixedly connected with the lower splicing notch 32 of the cutting through the embedded bolts 31 and the nuts 33, and the prefabricated screw holes 37 and the nut mounting grooves 36 are formed in the positions, corresponding to the embedded bolts 31, of the ends of the cutting bottom prefabricated cover plate 43 and the cutting upper prefabricated cover plate 44. Nut mounting grooves 36 and prefabricated screw holes 37 are formed in lap joint notches of the prefabricated cover plates at the bottom and the upper part, corresponding lap joint notches are formed by excavating the side edge of the top of the karst cave, grooves are formed in the positions of the prefabricated screw holes 37, prefabricated bolts and the prefabricated cover plates at the bottom are mounted, micro-expansion concrete is poured back, nuts 33 are mounted, and the prefabricated cover plates 42 of the cutting standard blocks are spliced; after the standard blocks are installed, installing a cutting upper prefabricated cover plate 44, overlapping the rock body notch, installing prefabricated bolts, recharging micro-expansion concrete, and installing screw caps; after the prefabricated cover plate is installed, foam concrete is poured back into the cave through the grouting holes 38 until the karst cave is completely filled.
The large-span karst cave prefabricated assembled column top-supporting recharging foam concrete system adopts segmented prefabricated concrete columns and prefabricated foam concrete templates to form a karst cave inner supporting system, an underground water-free funnel type deep water falling cave top hanging air bag bottom mold sealing foam concrete recharging system and a water falling cave water-pumping hanging air bag bottom mold sealing concrete bottom sealing and then pouring foam concrete system adopts a top hanging air bag to form a flexible bottom mold to fill foam concrete, a roadbed prefabricated cover plate sealing recharging foam concrete system adopts a prefabricated cover plate with an anchor hole, and a cut prefabricated assembled cover plate sealing recharging foam concrete system adopts a prefabricated assembled cover plate with a notch for anchoring and micro-expansion concrete sealing for recharging. The system provided by the utility model has the characteristics of good safety and high construction efficiency, can adapt to different karst cave types of the roadbed in the karst region, and has good economic and technical benefits.
Claims (5)
1. The utility model provides a karst area foam concrete backfill embankment which characterized in that: the method comprises a large-span karst cave prefabricated assembled column supporting top recharging foam concrete system, an underground water-free funnel type deep water falling cave top hanging air bag bottom mold sealing foam concrete recharging system, a funnel type water falling cave water pumping hanging air bag bottom mold sealing concrete bottom and then pouring foam concrete system, a roadbed prefabricated cover plate sealing recharging foam concrete system and a cutting prefabricated assembled cover plate sealing recharging foam concrete system;
the large-span karst cave prefabricated assembly type column top-supported recharging foam concrete system comprises an upper prefabricated concrete column (1) and a lower prefabricated concrete column (2), wherein the upper prefabricated concrete column (1) is supported and fixed through a steel bar support (3), steel strands (6) and anchoring steel bars (10), the steel bar support (3) is provided with steel strand pore passages (7), the lower prefabricated concrete column (2) is fixed to a column positioning groove (5) and is filled with foam concrete to fill gaps, and foam concrete is poured into a prefabricated foam concrete template (4) between the upper prefabricated concrete column (1) and the lower prefabricated concrete column (2) to form an integral karst cave inner supporting column;
the foam concrete recharging system comprises a top hanging air bag bottom die structure, wherein the top hanging air bag bottom die structure is formed by a top supporting steel pipe (11), an upper steel plate (12), a rubber air bag (13), a bottom steel plate (14) and a vertical steel pipe (16); the top supporting steel pipe (11), the vertical steel pipe (16), the upper steel plate (12), the rubber air bag (13) and the bottom steel plate (14) are sequentially welded and connected from top to bottom to form a whole; foam concrete is poured back above the upper steel plate (12);
the funnel-shaped water falling hole pumping hanging air bag bottom die is adopted to fill a foam concrete system after closing the concrete bottom, the funnel-shaped water falling hole pumping hanging air bag bottom die comprises a top hanging air bag bottom die structure and a pumping pipe (27), and the pumping pipe (27) extends into underground water (26) of the water falling hole (19);
the roadbed prefabricated cover plate closed recharging foam concrete system comprises embedded bolts (31), nuts (33) and prefabricated cover plates (34); two ends of a prefabricated cover plate (34) of the roadbed are fixed above the common concrete (29) through embedded bolts (31) and nuts (33), and second foam concrete (28) is arranged below the common concrete (29);
the cutting prefabricated assembly type cover plate sealing and recharging foam concrete system comprises a cutting standard block prefabricated cover plate (42), a cutting bottom prefabricated cover plate (43) and a cutting upper portion prefabricated cover plate (44), the cutting standard block prefabricated cover plate (42) is arranged between the cutting bottom prefabricated cover plate (43) and the cutting upper portion prefabricated cover plate (44), the ends of the cutting bottom prefabricated cover plate (43) and the cutting upper portion prefabricated cover plate (44) are fixed through embedded bolts (31) and nuts (33), and grouting holes (38) and air vents (39) are formed in the cutting upper portion prefabricated cover plate (44).
2. The karst area foam concrete backfilled embankment according to claim 1, wherein: the outer sides of the upper precast concrete strut (1) and the lower precast concrete strut (2) are provided with a steel bar support (3), steel strands (6) sequentially pass through a steel strand pore passage (7) at the top of the steel bar support (3) and a strut steel strand fixing ear hole (8) at the lower part of the upper precast concrete strut (1), and the outer ends of the steel strands (6) are respectively fixed on anchoring steel bars (10) on the periphery of the steel bar support (3); a prefabricated foam concrete template (4) is arranged between the upper prefabricated concrete pillar (1) and the lower prefabricated concrete pillar (2), and foam concrete is poured in a template groove (9) of the prefabricated foam concrete template (4).
3. The karst area foam concrete backfilled embankment according to claim 1, wherein: the two top supporting steel pipes (11) are welded together in a cross mode, a ventilation channel (15) is reserved at the joint of the top supporting steel pipes (11), the lower portion of each top supporting steel pipe (11) is welded with a vertical steel pipe (16), an upper steel plate (12) and a bottom steel plate (14) are welded at the bottom of each vertical steel pipe (16), a rubber air bag (13) is arranged between each upper steel plate (12) and each bottom steel plate (14), and the rubber air bag (13) is provided with an air inlet hole (25).
4. The karst area foam concrete backfilled embankment according to claim 1, wherein: the cover plate lap joint notch (35) of the prefabricated cover plate (34) and the lower splicing notch (32) of the roadbed are fixedly connected through the embedded bolts (31) and the screw caps (33), and prefabricated screw holes (37) and screw cap installation grooves (36) are formed in the positions, corresponding to the embedded bolts (31), of the two ends of the prefabricated cover plate (34).
5. The karst area foam concrete backfilled embankment according to claim 1, wherein: both ends of the cutting standard block prefabricated cover plate (42) are respectively provided with a splicing convex groove (40) and a splicing concave groove (41); the cover plate lap joint notch (35) of the prefabricated cover plate (43) at the bottom of the cutting and the prefabricated cover plate (44) at the upper part of the cutting are fixedly connected with the lower splicing notch (32) of the cutting through the embedded bolt (31) and the nut (33), and the prefabricated cover plate (43) at the bottom of the cutting and the prefabricated cover plate (44) at the upper part of the cutting are provided with the prefabricated screw hole (37) and the nut mounting groove (36) at the position corresponding to the embedded bolt (31).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121527789.8U CN215856991U (en) | 2021-07-06 | 2021-07-06 | Foam concrete backfilling embankment in karst area |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121527789.8U CN215856991U (en) | 2021-07-06 | 2021-07-06 | Foam concrete backfilling embankment in karst area |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215856991U true CN215856991U (en) | 2022-02-18 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121527789.8U Active CN215856991U (en) | 2021-07-06 | 2021-07-06 | Foam concrete backfilling embankment in karst area |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215856991U (en) |
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2021
- 2021-07-06 CN CN202121527789.8U patent/CN215856991U/en active Active
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