CN112663634A - Geotechnical engineering slope reinforcement device and method - Google Patents
Geotechnical engineering slope reinforcement device and method Download PDFInfo
- Publication number
- CN112663634A CN112663634A CN202011486190.4A CN202011486190A CN112663634A CN 112663634 A CN112663634 A CN 112663634A CN 202011486190 A CN202011486190 A CN 202011486190A CN 112663634 A CN112663634 A CN 112663634A
- Authority
- CN
- China
- Prior art keywords
- nail
- pipe
- installation
- reinforcing
- slope
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
Images
Landscapes
- Pit Excavations, Shoring, Fill Or Stabilisation Of Slopes (AREA)
Abstract
The invention discloses a geotechnical engineering slope reinforcing device, which comprises: the installation structure comprises a reinforcing installation layer and a fixing device, wherein the reinforcing installation layer comprises a protective net and an installation base, the protective net is formed by connecting a plurality of fixing strips, an assembly hole is formed in the joint, the installation base comprises a fixing seat and an installation pipe, the fixing seat is fixedly connected to the assembly hole, the installation pipe is connected to one side of the fixing seat, and the diameter of the installation pipe is consistent with that of the installation hole; the nail is gone into the mechanism, the nail is gone into the mechanism and is included reinforced nail and side nail, reinforced nail inside has seted up the inlet pipe, the inclined hole has been seted up to the installation pipe lateral wall, and is a plurality of the inclined hole symmetry is seted up in installation pipe both sides, side nail fixed mounting is inside the inclined hole, the side nail is close to the inside one end fixed mounting of installation pipe has the dog. The invention disperses the generated landslide force out through the device when the landslide occurs, and enhances the stability and firmness of the whole side slope.
Description
Technical Field
The invention relates to the technical field of slope reinforcement, in particular to a geotechnical engineering slope reinforcement device and method.
Background
The slope refers to a slope surface with a certain slope, which is made on two sides of the roadbed to ensure the stability of the roadbed, along with the continuous expansion of the construction scale of national capital construction, a large number of engineering slopes, natural slopes and landslides appear in engineering projects, and factors such as landslide, sideslip and collapse of the slope are main disastrous factors for slope damage, so that the slope reinforcement and management become major problems in the engineering, and at present, in the engineering practice of constructing roads, railways, foundation pits, open mines and the like in China, a large number of anchoring technologies are adopted to reinforce rock-soil slopes, and wall surfaces and concrete are trimmed on the surface of the rock-soil slopes, and the mode can indirectly improve the strength of the slope.
However, the existing slope reinforcement mode has the defects of uneven slope stress and poor slope protection after the slope is reinforced, and particularly when the weathered rock slope is reinforced, if the anchoring depth of the anchor rod is insufficient, the instability damage phenomenon of the anchoring structure can be easily caused, sufficient support can not be provided for the slope, and the slope can not be sufficiently protected.
Disclosure of Invention
The invention aims to solve the following defects in the prior art that sufficient support cannot be provided for a side slope and the side slope cannot be sufficiently protected, and provides a geotechnical engineering side slope reinforcing device and a geotechnical engineering side slope reinforcing method.
In order to achieve the purpose, the invention adopts the following technical scheme:
a geotechnical engineering slope reinforcement device, the reinforcement device includes:
the installation structure comprises a reinforcing installation layer and a supporting frame, wherein the reinforcing installation layer comprises a protective net and an installation base, the protective net is formed by fixedly connecting a plurality of fixing strips in a staggered mode, an assembly hole is formed in the joint, the installation base comprises a fixing seat and an installation pipe, the fixing seat is fixedly connected to the assembly hole, an installation hole with the size being the same as that of the assembly hole is formed in the middle of the fixing seat, the installation pipe is fixedly connected to one side of the fixing seat, and the diameter of the installation pipe is the same as that of the installation;
the nail is gone into the mechanism, the nail is gone into the mechanism and is included reinforcing nail and side nail, reinforcing nail diameter is unanimous with the pilot hole, and the inside inlet pipe of having seted up, the inclined hole has been seted up to installation pipe lateral wall, and is a plurality of the inclined hole symmetry is seted up in installation pipe both sides, side nail fixed mounting is inside the inclined hole, and the part is located the installation intraduct, the side nail is close to the inside one end fixed mounting of installation pipe and is had the dog.
Preferably, the included angle between the side nail and the inclined hole and the horizontal plane is 45-60 degrees, and the length of the side nail is greater than that of the inclined hole.
Preferably, be provided with conveying mechanism between side nail and the reinforcement nail, conveying mechanism includes side pipe and conveying pipeline, and is a plurality of side pipe fixed mounting is at the reinforcement nail lateral wall, and communicates with the inlet pipe, the conveying pipeline is seted up inside the side nail, and when reinforcement nail got into the installation intraductal completely, and the side pipe docks with the conveying pipeline mouth of pipe.
Preferably, the side nails are connected with the inclined holes through connecting rings, and the connecting rings are made of fragile materials.
Preferably, the fixing base is connected with the reinforcing nail through a limiting mechanism, the limiting mechanism comprises a limiting groove and a limiting block, the limiting groove is formed in one side, far away from the installation pipe, of the fixing base, the limiting block is fixedly installed on one side of the flat end of the reinforcing nail, the diameter of the reinforcing nail is larger than the diameter of the reinforcing nail, and the limiting block is clamped inside the limiting groove.
Preferably, the check block is made of elastic materials, the thickness of the check block is larger than the gap between the reinforcing nail and the mounting pipe, the inner portion of the check block is arc-shaped, and the height of the check block is larger than the diameter of the inclined hole.
Preferably, the diameter of the side pipe is consistent with that of the feeding pipe, and the included angle between the side pipe and the horizontal direction is consistent with that of the side nail.
A geotechnical engineering slope reinforcement method comprises the following processing steps:
s1: paving an anti-leakage layer on the rock engineering side slope, and fixing the anti-leakage layer on the side slope by paving concrete so as to form an external fixed layer;
s2: paving a protective net in the reinforcing device on the external fixing layer, and drilling an assembly hole from the protective net to the interior of the rock engineering side slope;
s3: fixing the mounting base at the position of the protective net provided with the assembling hole, and fixedly mounting the bottom inside the assembling hole of the side slope;
s4: nailing the reinforcing nail into the deep part of the rock engineering side slope from the mounting seat and the assembling hole through external force;
s5: pouring mortar into the material conveying pipe from a material inlet pipe in the center of the reinforcing nail, wherein the mortar enters the material conveying pipe through the side pipe, mortar caking is formed at the tip of the reinforcing nail and the tip of the side nail, and a layer of mortar protective layer is formed inside the rock engineering slope by the reinforcing nails which are densely distributed;
s6: and planting plants with developed rootstocks in the pre-buried pipes fixed in advance.
Compared with the prior art, the invention has the beneficial effects that:
1. inside the side slope is fixed to the installation pipe, the inside reinforcement nail of nailing of cooperation installation pipe, pour into the mortar in reinforcing the nail, the mortar is followed side pipe and conveying pipeline and is distinguished, nail port and reinforcement nail port department discharge in the side, a mortar piece has been formed around reinforcing the nail, the reinforcement nail that densely distributes makes a mortar piece intercombination, one deck mortar protective layer has been located mutually in geotechnical engineering side slope inside, become whole with whole side slope, the stability and the fastness of whole side slope have been strengthened.
2. The slope reinforcement device comprises a plurality of installation pipes fixed inside a slope along the direction of the slope, the installation pipes are connected together through a protection net, the reinforcement device fixes the whole slope into a whole, so that the slope is not easy to locally slide, and the locally generated slope force can be dispersed to the slope through the protection net and the installation pipes.
Drawings
FIG. 1 is a schematic view of a geotechnical engineering slope reinforcement device provided by the invention;
FIG. 2 is a schematic diagram of a protective net structure of a geotechnical engineering slope reinforcement device provided by the invention;
FIG. 3 is a schematic front structural view of a slope reinforcement device for geotechnical engineering according to the present invention;
FIG. 4 is a schematic front structural view of a slope reinforcement device for geotechnical engineering according to the present invention;
fig. 5 is a partially enlarged structural diagram of a in fig. 4.
In the figure: 1 protection network, 2 fixing bases, 3 mounting pipes, 4 assembling holes, 5 mounting holes, 6 reinforcing nails, 7 feeding pipes, 8 side nails, 9 inclined holes, 10 stop blocks, 11 side pipes, 12 conveying pipes, 13 connecting rings, 14 limiting grooves and 15 limiting blocks.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.
Referring to fig. 1 to 5, a slope reinforcement device for geotechnical engineering includes:
the mounting structure comprises a reinforcing mounting layer, the reinforcing mounting layer comprises a protective net 1 and a mounting base, the protective net 1 is formed by fixedly connecting a plurality of fixing strips in a staggered mode, assembling holes 4 are formed in the connecting positions, the mounting base comprises fixing seats 2 and mounting pipes 3, the fixing seats 2 are fixedly connected to the assembling holes 4, mounting holes 5 with the sizes being identical to those of the assembling holes 4 are formed in the middle of the fixing seats, the mounting pipes 3 are fixedly connected to one sides of the fixing seats 2, the diameters of the mounting pipes 3 are identical to those of the mounting holes 5, the protective net 1 connects the mounting bases together, and force generated when a landslide occurs is dispersed through the linkage effect of the protective net 1, so that the occurrence of a landslide is avoided;
nail into mechanism, nail into mechanism is including consolidating 6 and side nail 8, consolidate 6 diameters of nail and 4 unanimities of pilot hole, and inside inlet pipe 7 has been seted up, inclined hole 9 has been seted up to installation pipe 3 lateral walls, a plurality of inclined holes 9 symmetry are seted up in installation pipe 3 both sides, 8 fixed mounting are inside in inclined hole 9 to side nail, and the part is located installation pipe 3 inside, side nail 8 is close to the inside one end fixed mounting of installation pipe 3 and has dog 10, it is provided with the card strip and the inside draw-in groove that is provided with of installation pipe 3 to consolidate 6 sides of nail, it is inside to consolidate 6 nail into installation pipe 3 along the draw-in groove nail.
In the invention, a protective net 1 is fixedly arranged on an external fixed layer of a side slope, assembling holes 4 are drilled on the external fixed layer and the protective net 1, a fixed seat 2 is arranged on the protective net 1, an installation pipe 3 is arranged in the external fixed layer, reinforcing nails 6 are driven into the installation pipe 3 through an external machine, the reinforcing nails 6 extrude side nails 8 at two sides outwards from inclined holes 9 in the nailing process, the side nails 8 fix the installation pipe 3 in the side slope from the side wall along with the continuous nailing of the reinforcing nails 6, when the reinforcing nails 6 are nailed to the bottom, mortar is poured into a feed pipe 7, the mortar is separated from a side pipe 11 and a feed pipe 12 and is discharged from the ports of the side nails 8 and the reinforcing nails 6, a mortar block is formed around the reinforcing nails 6, the reinforcing nails 6 which are distributed densely combine the mortar blocks, and a mortar protective layer is arranged in the interior of the side slope engineering, the stability and firmness of the whole slope are enhanced.
In the preferable technical scheme in the embodiment, the included angle between the side nail 8 and the inclined hole 9 and the horizontal plane is 45-60 degrees, the length of the side nail 8 is greater than that of the inclined hole 9, and the side nail 8 is used for reinforcing the connection between the installation pipe 3 and the side slope, so that the side nail needs to be nailed into the side slope;
a material conveying mechanism is arranged between the side nails 8 and the reinforcing nails 6 and comprises side pipes 11 and material conveying pipes 12, the side pipes 11 are fixedly arranged on the side walls of the reinforcing nails 6 and are communicated with the feeding pipes 7, the material conveying pipes 12 are arranged inside the side nails 8, and when the reinforcing nails 6 completely enter the installation pipes 3, the side pipes 11 are butted with the pipe orifices of the material conveying pipes 12 due to the arrangement of the clamping grooves and the clamping strips, mortar is dispersed from the feeding pipes 7 to each side nail 8 by the side pipes 11 and the material conveying pipes 12, so that a mortar protective layer is firmer;
the side nails 8 are connected with the inclined holes 9 through connecting rings 13, the connecting rings 13 are made of brittle materials and can be broken when being impacted by large force, when the reinforcing nails 6 enter the mounting pipes 3, the reinforcing nails 6 are in contact with the side nails 8 to be abutted, and the connecting rings 13 are broken by acting force, so that the side nails 8 are fixed into a side slope from the inclined holes 9;
the fixing seat 2 and the reinforcing nail 6 are connected through a limiting mechanism, the limiting mechanism comprises a limiting groove 14 and a limiting block 15, the limiting groove 14 is formed in one side, far away from the installation pipe 3, of the fixing seat 2, the limiting block 15 is fixedly installed on one side, far away from the flat end of the reinforcing nail 6, the diameter of the limiting block 15 is larger than that of the reinforcing nail 6, the limiting block 15 is clamped inside the limiting groove 14, and the limiting mechanism is arranged to ensure butt joint of the side pipe 11 and the conveying pipe 12 and ensure that mortar can enter a side slope from the side;
the stop dog 10 is made of elastic materials, the thickness of the stop dog is larger than the gap between the reinforcing nail 6 and the mounting pipe 3, the inner part of the stop dog 10 is arc-shaped, the height of the stop dog is larger than the diameter of the inclined hole 9, the stop dog 10 can strengthen the connection between the reinforcing nail 6 and the mounting pipe 3 to a certain extent, and meanwhile, in the process that the stop dog 10 moves downwards, the side nail 8 can be extruded from the inclined hole 9 at the inner part of the mounting pipe 3 and can be nailed into a side slope;
the diameter of the side pipe 11 is consistent with that of the feeding pipe 7, so that mortar can enter conveniently, and the included angle between the side pipe 11 and the horizontal direction is consistent with that of the side nail 8.
The geotechnical engineering slope reinforcement method comprises the following processing steps:
s1: paving an anti-leakage layer on the rock engineering side slope, and fixing the anti-leakage layer on the side slope by paving concrete so as to form an external fixed layer;
s2: paving a protective net 1 in a reinforcing device on an external fixing layer, and drilling an assembly hole 4 from the protective net 1 to the interior of the rock engineering side slope;
s3: fixing a mounting base at the position of the protective net 1 provided with the assembly holes 4, wherein the bottom of the mounting base is fixedly mounted in the assembly holes 4 of the side slope;
s4: the reinforcing nails 6 are nailed into the deep part of the rock engineering side slope from the mounting seat and the inside of the assembling hole 4 through external force, and the reinforcing nails 6 can be nailed into the side slope through manpower or an electric hammer;
s5: pouring mortar into the reinforcing nails 6 from a feeding pipe 7 at the center of the reinforcing nails, enabling the mortar to enter a conveying pipe 12 through side pipes 11, forming mortar agglomerations at the tips of the reinforcing nails 6 and the tips of the side nails 8, and enabling the reinforcing nails 6 which are densely distributed to form a mortar protective layer inside the rock engineering side slope;
s6: the developed plant of root and stem is planted in the embedded pipe fixed in advance, the developed green of root system is planted to the embedded pipe, the root of green planting is inwards grown along the inside of the embedded pipe, the root is on the side slope, and then the soil on the side slope is fixed, the condition that the loose soil on the side slope causes landslide due to water and soil loss is avoided, and the purpose of preventing water and soil loss is achieved.
According to the invention, the installation pipes 3 fixed inside the side slope along the direction of the side slope are matched with the reinforcing nails 6 nailed inside the installation pipes 3, mortar is poured into the reinforcing nails 6 to form a mortar protective layer, so that the whole side slope is fixed into a whole, the local part of the side slope is not easy to slide, and the locally generated landslide force can be dispersed to the side slope itself through the protective net 1 and the installation pipes 3.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (8)
1. The utility model provides a geotechnical engineering slope reinforcing apparatus, its characterized in that, reinforcing apparatus includes:
the installation structure comprises a reinforcing installation layer, wherein the reinforcing installation layer comprises a protective net (1) and an installation base, the protective net (1) is formed by fixedly connecting a plurality of fixing strips in a staggered mode, an assembly hole (4) is formed in the joint, the installation base comprises a fixing seat (2) and an installation pipe (3), the fixing seat (2) is fixedly connected to the assembly hole (4), an installation hole (5) with the size identical to that of the assembly hole (4) is formed in the middle of the fixing seat, the installation pipe (3) is fixedly connected to one side of the fixing seat (2), and the diameter of the installation pipe (3) is identical to that of the installation hole (5);
nail into mechanism, nail into mechanism is including consolidating nail (6) and side nail (8), consolidate nail (6) diameter and pilot hole (4) unanimously, and inside inlet pipe (7) have been seted up, inclined hole (9) have been seted up to installation pipe (3) lateral wall, and are a plurality of inclined hole (9) symmetry is seted up in installation pipe (3) both sides, side nail (8) fixed mounting is inside inclined hole (9), and the part is located installation pipe (3) inside, side nail (8) are close to the inside one end fixed mounting of installation pipe (3) and are had dog (10).
2. Geotechnical slope reinforcement device according to claim 1, characterized in that the angle between said side nails (8) and inclined holes (9) and the horizontal is 45 ° -60 °, and the length of the side nails (8) is greater than the length of the inclined holes (9).
3. Geotechnical engineering slope reinforcing apparatus according to claim 1, characterized in that a material conveying mechanism is arranged between said side nails (8) and said reinforcing nails (6), said material conveying mechanism includes side pipes (11) and material conveying pipes (12), a plurality of said side pipes (11) are fixedly mounted on the side wall of the reinforcing nails (6) and are communicated with the material inlet pipes (7), said material conveying pipes (12) are arranged inside the side nails (8), and when the reinforcing nails (6) completely enter the inside of the mounting pipe (3), the pipe mouths of the side pipes (11) and the material conveying pipes (12) are butted.
4. The geotechnical slope reinforcement device according to claim 1, wherein the side nails (8) are connected with the inclined holes (9) through connecting rings (13), and the connecting rings (13) are made of brittle materials.
5. The geotechnical engineering slope reinforcement device according to claim 1, wherein the fixing seat (2) is connected with the reinforcement nail (6) through a limiting mechanism, the limiting mechanism comprises a limiting groove (14) and a limiting block (15), the limiting groove (14) is formed in one side, away from the installation pipe (3), of the fixing seat (2), the limiting block (15) is fixedly installed on one side of the flat end of the reinforcement nail (6), the diameter of the limiting block is larger than that of the reinforcement nail (6), and the limiting block (15) is clamped inside the limiting groove (14).
6. The geotechnical slope reinforcement device according to claim 1, wherein the stop block (10) is made of elastic material, the thickness of the stop block is larger than the gap between the reinforcement nail (6) and the installation pipe (3), the inner part of the stop block (10) is arc-shaped, and the height of the stop block is larger than the diameter of the inclined hole (9).
7. Geotechnical slope reinforcement device according to claim 1, characterized in that the diameter of said side pipe (11) is identical to the diameter of the feeding pipe (7), and the angle of the side pipe (11) to the horizontal is identical to the side nail (8).
8. A geotechnical engineering slope reinforcement method is characterized by comprising the following processing steps:
s1: paving an anti-leakage layer on the rock engineering side slope, and fixing the anti-leakage layer on the side slope by paving concrete so as to form an external fixed layer;
s2: paving a protective net (1) in a reinforcing device on an external fixing layer, and drilling an assembly hole (4) from the protective net (1) to the interior of the rock engineering side slope;
s3: fixing a mounting base at the position of the protective net (1) provided with the assembly hole (4), wherein the bottom of the mounting base is fixedly mounted in the assembly hole (4) of the side slope;
s4: the reinforcing nails (6) are nailed into the deep part of the rock engineering side slope from the mounting seat and the inside of the assembling hole (4) through external force;
s5: mortar is poured into the material conveying pipe (12) from a material inlet pipe (7) at the center of the reinforcing nail (6), the mortar enters the material conveying pipe (12) through a side pipe (11), mortar caking is formed at the tip of the reinforcing nail (6) and the tip of the side nail (8), and a layer of mortar protective layer is formed inside the rock engineering slope through the reinforcing nails (6) which are densely distributed;
s6: and planting plants with developed rootstocks in the pre-buried pipes fixed in advance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011486190.4A CN112663634A (en) | 2020-12-16 | 2020-12-16 | Geotechnical engineering slope reinforcement device and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011486190.4A CN112663634A (en) | 2020-12-16 | 2020-12-16 | Geotechnical engineering slope reinforcement device and method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112663634A true CN112663634A (en) | 2021-04-16 |
Family
ID=75405459
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011486190.4A Withdrawn CN112663634A (en) | 2020-12-16 | 2020-12-16 | Geotechnical engineering slope reinforcement device and method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112663634A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114541435A (en) * | 2022-03-22 | 2022-05-27 | 衢州学院 | Slope supporting and reinforcing equipment for geotechnical engineering and using method thereof |
-
2020
- 2020-12-16 CN CN202011486190.4A patent/CN112663634A/en not_active Withdrawn
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114541435A (en) * | 2022-03-22 | 2022-05-27 | 衢州学院 | Slope supporting and reinforcing equipment for geotechnical engineering and using method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN111594229B (en) | Construction method for multi-arch tunnel entrance under shallow-buried water-rich geological condition | |
| CN101280564B (en) | Pit pile anchor wall concrete breast beam structure and construction method thereof | |
| CN104389610B (en) | A kind of ultrashort step construction method of traversing operation freeway tunnel | |
| CN206956742U (en) | High precipitous rock roadbed side slope repair system | |
| CN104831734A (en) | Construction method of jet-grouting pile and composite soil-nailed wall support for deep foundation pit construction | |
| CN105839651A (en) | Roadbed slope assembly type deformation self-adaptive protective framework and splicing method thereof | |
| CN112709237A (en) | Construction method of anchor rod sash beam for high-speed slope protection | |
| CN107524141B (en) | Construction method of cast-in-situ bored pile of rock soil foundation | |
| CN204000925U (en) | Prefabricated diaphragm wall | |
| CN112663634A (en) | Geotechnical engineering slope reinforcement device and method | |
| CN112482409B (en) | Combined supporting device and construction method thereof | |
| CN113668501A (en) | CFG pile composite foundation construction method | |
| CN111622234B (en) | Unloading type thin-wall box-type retaining wall supported by obliquely and vertically combined steel pipe pile and construction process | |
| CN110905529B (en) | Construction method of loess tunnel penetrating through landslide mass | |
| CN110805049B (en) | Construction method of mountain slope ultra-thickness spray anchor permanent supporting structure | |
| CN112832235A (en) | Construction method and construction device for precast pile post-grouting | |
| CN205653804U (en) | Slope assembled warp self -adaptation protection skeleton | |
| CN112412340B (en) | Sand layer geological soil nailing wall supporting construction method | |
| CN114059566B (en) | Soft rock slope semi-rigid supporting and retaining structure and construction method thereof | |
| CN114197502B (en) | Recyclable palace laminated green protection grid and construction method thereof | |
| CN216475115U (en) | Recyclable slope lamination green protection grid | |
| CN206768822U (en) | A kind of simple automatic positioning equipment of cast-in-place concrete pile interpolation steel pipe column | |
| CN214194466U (en) | Reserved grouting hole structure for foundation treatment of embedded large-scale vibration equipment | |
| CN212612535U (en) | Ecological slope protection structure made of novel glass fiber reinforced plastic material | |
| CN109653193B (en) | Reverse construction method for underground continuous wall |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20210416 |
|
| WW01 | Invention patent application withdrawn after publication |