CN113279422A - Excavation method suitable for hard rock stratum enlarged foundation - Google Patents
Excavation method suitable for hard rock stratum enlarged foundation Download PDFInfo
- Publication number
- CN113279422A CN113279422A CN202110648595.1A CN202110648595A CN113279422A CN 113279422 A CN113279422 A CN 113279422A CN 202110648595 A CN202110648595 A CN 202110648595A CN 113279422 A CN113279422 A CN 113279422A
- Authority
- CN
- China
- Prior art keywords
- foundation
- hard rock
- drilling
- method suitable
- excavation method
- 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.)
- Pending
Links
- 238000000034 method Methods 0.000 title claims abstract description 42
- 239000011435 rock Substances 0.000 title claims abstract description 41
- 238000009412 basement excavation Methods 0.000 title claims abstract description 27
- 238000005553 drilling Methods 0.000 claims abstract description 46
- 239000004575 stone Substances 0.000 claims abstract description 13
- 230000015572 biosynthetic process Effects 0.000 claims description 8
- 238000005498 polishing Methods 0.000 claims description 3
- 238000010276 construction Methods 0.000 abstract description 32
- 230000002093 peripheral effect Effects 0.000 abstract description 18
- 238000005422 blasting Methods 0.000 abstract description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 6
- 238000005520 cutting process Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D27/00—Foundations as substructures
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F5/00—Dredgers or soil-shifting machines for special purposes
- E02F5/30—Auxiliary apparatus, e.g. for thawing, cracking, blowing-up, or other preparatory treatment of the soil
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B7/00—Special methods or apparatus for drilling
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Mechanical Engineering (AREA)
- Paleontology (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- Geochemistry & Mineralogy (AREA)
- Earth Drilling (AREA)
Abstract
The invention discloses an excavation method suitable for a hard rock stratum enlarged foundation, which comprises the following steps: determining the range of the required basis; arranging a drilling track along the periphery of the foundation; drilling along the drilling track by using a drilling machine to separate a foundation; crushing the foundation by using a crusher, and removing broken stones; locally grinding the crushed foundation to ensure the flatness of the foundation; checking the acceptance basis. According to the method, the drilling machine is adopted to automatically drill holes along the drilling track so as to separate the foundation from the peripheral area, and the rhinestone does not need to be manually held to cut the periphery of the foundation, so that the construction efficiency can be effectively improved, and the labor intensity of operators can be effectively reduced. In addition, the foundation is crushed by the crusher without adopting a blasting mode, so that the crushing degree of the foundation can be effectively controlled, the rock layer of the foundation is prevented from being damaged, and the risk of accidents of operators can be reduced.
Description
Technical Field
The invention relates to the technical field of excavation, in particular to an excavation method suitable for a hard rock stratum expanded foundation.
Background
In the prior art, in the construction of all kinds of hard rock layer foundations, the mode of adopting artifical water to bore cutting or blasting usually goes on, and wherein, the mode of artifical water to bore cutting is the measurement of carrying out basic construction scope earlier, recycles artifical handheld water to bore the instrument and carry out the cutting operation to cut apart required basic scope, inspect the acceptance operation at last, carry out next process again after the basis accords with the construction requirement. However, the method mainly uses manual labor, which results in higher cost, longer construction period and large potential safety hazard in the construction process. The blasting mode is to measure the construction range of the foundation, then to perform the digging operation by the blasting mode to obtain the required foundation range, and finally to perform the checking and accepting operation, and to perform the next procedure when the foundation meets the construction requirements. However, the integrity of the rock stratum may be damaged during blasting, so that the rock stratum structure is unsafe, the cost and the construction period are high, and a large potential safety hazard exists.
In summary, how to improve the operation efficiency and safety of the foundation construction of the hard rock layer is a problem to be solved urgently by the technical personnel in the field at present.
Disclosure of Invention
In view of the above, the present invention provides an excavation method suitable for expanding a foundation of a hard rock formation, which can effectively improve the operation efficiency and safety of the foundation construction of the hard rock formation.
In order to achieve the above purpose, the invention provides the following technical scheme:
an excavation method suitable for expanding the foundation of a hard rock stratum comprises the following steps:
determining the range of the required basis;
arranging a drilling track along the periphery of the foundation;
drilling along the drilling track with a drilling machine to isolate the foundation;
crushing the foundation by using a crusher, and removing broken stones;
locally grinding the broken foundation to ensure that the foundation is smooth;
and checking and accepting the basis.
Preferably, the drill is a crawler down-the-hole drill.
Preferably, the length of the drill rod of the drilling machine is 3m-5m, and the drilling machine drills holes at equal intervals along the drilling track.
Preferably, the range of the basis required for determining includes: and determining the side line of the foundation by using a polar coordinate method.
Preferably, the crushing the foundation by using the crusher and removing the crushed stones comprises:
crushing the foundation with the crusher;
loading the crushed stones into a truck by using an excavator;
transferring the crushed stone with a transport vehicle.
Preferably, the crusher is a CAT320 crusher, the excavator is a CAT320 excavator, and the transport vehicle is a dump truck.
Preferably, said locally grinding said foundation after crushing to ensure that said foundation is flat comprises: and manually holding the grinding device to locally grind and level the broken foundation.
Preferably, the grinding device is an air pick or an electric pick.
According to the excavation method suitable for the expanded foundation of the hard rock layer, the drilling machine is adopted to automatically drill holes along the drilling track so as to separate the foundation from the peripheral area, the periphery of the foundation is cut without manually holding the water drill, the construction efficiency can be effectively improved, and the labor intensity of operators can be reduced. In addition, the foundation is crushed by the crusher without adopting a blasting mode, so that the crushing degree of the foundation can be effectively controlled, the rock layer of the foundation is prevented from being damaged, and the risk of accidents of operators in the construction process can be reduced.
In conclusion, the excavation method suitable for the hard rock stratum expanded foundation provided by the invention can effectively improve the operation efficiency and the safety of the hard rock stratum foundation construction.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
FIG. 1 is a schematic flow chart of an excavation method suitable for expanding the foundation of a hard rock layer according to the present invention;
FIG. 2 is a schematic view of a drill track along the perimeter of a substrate;
FIG. 3 is a side view of FIG. 2;
FIG. 4 is another schematic view of the drill tracks along the perimeter of the foundation;
fig. 5 is a side view of fig. 4.
In fig. 1-5:
1 is a base and 2 is a peripheral hole.
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. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The core of the invention is to provide the excavation method suitable for the expanded foundation of the hard rock layer, which can effectively improve the operation efficiency and the safety of the foundation construction of the hard rock layer.
Please refer to fig. 1 to 5.
The specific embodiment provides an excavation method suitable for a hard rock stratum enlarged foundation, which comprises the following steps:
s1, determining the range of the required basis 1;
s2, arranging a drilling track along the periphery of the foundation 1;
s3, drilling along the drilling track by using a drilling machine to separate the foundation 1;
s4, crushing the foundation 1 by using a crusher, and removing broken stones;
s5, locally polishing the crushed foundation 1 to ensure the flatness of the foundation 1;
and S6, checking an acceptance base 1.
It should be noted that, drilling along the periphery of the required foundation 1 by using a drilling machine to effectively separate the foundation 1 from the peripheral area, so as to avoid damage to the peripheral area caused by the subsequent construction process. After the crusher is used for crushing the foundation 1, the base surface of the foundation 1 is possibly uneven, so that the foundation 1 after being crushed is locally polished, the uneven base surface of the foundation 1 can be polished to be flat, flatness of all positions of the base surface is ensured, and the operation effect of subsequent processes is further ensured.
It should be noted that the excavation method suitable for the hard rock stratum enlarged foundation provided by the invention can effectively save the construction cost, shorten the construction period, reduce the safety risk of operators, ensure the integrity of the foundation 1 and ensure the forming quality to be reliable, and the method is suitable for the construction operation of various hard rock stratum enlarged foundations 1.
According to the excavation method suitable for the expanded foundation of the hard rock layer, the drilling machine is adopted to automatically drill holes along the drilling track so as to separate the foundation 1 from the peripheral area, the periphery of the foundation 1 is not required to be cut by manually holding the water drill, the construction efficiency can be effectively improved, and the labor intensity of operators can be reduced. In addition, the foundation 1 is crushed by the crusher without adopting a blasting mode, so that the crushing degree of the foundation 1 can be effectively controlled, the rock layer of the foundation 1 is prevented from being damaged, and the risk of accidents of operators in the construction process can be reduced.
In conclusion, the excavation method suitable for the hard rock stratum expanded foundation provided by the invention can effectively improve the operation efficiency and the safety of the hard rock stratum foundation 1 construction.
On the basis of the above embodiment 1, it is preferable that the drill is a crawler type down-the-hole drill. The crawler-type down-the-hole drill is mechanical drilling equipment, can effectively drill the peripheral holes 2 for expanding the range of a foundation 1, has higher operation efficiency and can effectively shorten the construction period.
Preferably, the length of the drill rod of the drilling machine is 3m-5m, and the drilling machine drills holes at equal intervals along the drilling track. The length of the drill rod of the drilling machine needs to be matched with the size of the drilled hole, namely the drill rod needs to be matched with the depth of the foundation 1, and the drilling at equal intervals can improve the operation efficiency of the drilling machine. If the foundation 1 is not large in area, a plurality of peripheral holes 2 may be first drilled along the periphery of the foundation 1 using a drill to form a separating ring around the periphery of the foundation 1, as shown in fig. 2 and 3. However, if the area of the foundation 1 is too large, a plurality of peripheral holes 2 may be first drilled along the peripheral portion of the foundation 1 using a drilling machine so that the peripheral portion of the foundation 1 forms a large division ring, and then the large division ring may be divided using the drilling machine so as to be uniformly divided into a plurality of small division rings, and an excavation crushing operation may be performed in the plurality of small division rings, as shown in fig. 4 and 5.
Preferably, S1 includes: the side line of the foundation 1 is determined by using a polar coordinate method, so that the side line of the foundation 1 can be effectively divided, the foundation 1 is separated from the peripheral area, the peripheral area and the foundation 1 are not required to be divided by arranging a template, the accuracy of the range of the foundation 1 can be ensured, and the construction efficiency is improved.
Preferably, S4 includes:
s41, crushing the foundation 1 by using a crusher;
s42, loading the broken stones by using the excavator;
and S43, transferring the crushed stones by using a transport vehicle.
Preferably, the crusher is a CAT320 crusher, the excavator is a CAT320 excavator, and the transport vehicle is a dump truck. The CAT320 crusher is a hydraulic mechanical crusher which can effectively crush rocks in the inner ring of the peripheral hole 2, and the dumper is also called a dump truck which can unload cargos by hydraulic or mechanical lifting. Therefore, after the foundation 1 and the periphery are separated, the CAT320 crusher can be used for crushing the foundation 1, then the CAT320 excavator is used for loading and collecting crushed rocks, and finally the crushed rocks are moved to crushed stones by the dump truck.
The types of the crusher, the excavator and the transport vehicle can be determined according to actual conditions and actual requirements in the actual application process.
Preferably, S5 includes: the manual hand-held grinding device is used for locally grinding and leveling the broken foundation 1 so as to ensure that all parts of the base surface of the foundation 1 are smooth and convenient for ensuring the subsequent construction effect.
Preferably, the grinding device is an air pick or an electric pick.
The pneumatic pick is a handheld construction machine which takes compressed air as power and utilizes the impact action to crush hard objects, has compact structure and light portability, and can be inserted into a real object to crush the hard objects. The electric pick is a double-insulation hand-held electric tool taking a single-phase series motor as power, has the characteristics of safety, reliability, high efficiency, convenience in operation and the like, is widely applied to the construction processes of pipeline laying, mechanical installation, construction of water supply and drainage facilities and the like, and can effectively realize the operations of crushing, leveling, digging, grooving, cutting and the like.
It should be noted that the excavation method suitable for the hard rock stratum expanded foundation provided by the invention is characterized in that the peripheral lines of the foundation 1 are determined before construction, and then the drilling tracks are arranged on the peripheral lines by using the steel pipes, so that the phenomenon of drilling deviation in the subsequent drilling process is avoided. Subsequently, the type of the drilling machine can be determined according to the required drilling depth, then the drilling machine is used for drilling the peripheral holes 2 along the drilling track to effectively separate the foundation 1 from the peripheral area, then the crushing operation can be carried out on the foundation 1 by using the crushing machine so as to crush the rocks into the gravels capable of being loaded in the vehicle, after the crushing operation is completed, the gravels in the foundation 1 are loaded by using the digging machine, then the gravels are loaded to a slag disposal site by using the self-dumping vehicle, then a constructor can further polish some uneven areas of the foundation 1 by using an air pick or an electric pick so as to ensure that all parts of the base surface of the foundation 1 are flat, and finally, the inspection and acceptance are carried out according to the position and the depth requirement of the base surface.
The excavation method suitable for the hard rock stratum enlarged foundation provided by the invention is used for construction operation, so that the construction cost can be effectively saved, the construction period is shortened, and the safety risk of operators is reduced.
It should be noted that the directions and positional relationships indicated by "upper" and "lower" in the present application are based on the directions and positional relationships shown in the drawings, and are only for the convenience of simplifying the description and facilitating the understanding, but do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and thus, should not be construed as limiting the present invention.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other. Any combination of all embodiments provided by the present invention is within the scope of the present invention, and will not be described herein.
The excavation method suitable for the hard rock stratum enlarged foundation provided by the invention is described in detail above. The principles and embodiments of the present invention are explained herein using specific examples, which are presented only to assist in understanding the method and its core concepts. 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.
Claims (8)
1. An excavation method suitable for expanding the foundation of a hard rock layer is characterized by comprising the following steps:
determining the range of the required basis (1);
arranging a drilling track along the periphery of the foundation (1);
drilling along the drilling trajectory with a drilling machine to isolate the foundation (1);
crushing the foundation (1) by using a crusher, and removing broken stones;
locally grinding the broken foundation (1) to ensure that the foundation (1) is flat;
checking and accepting the basis (1).
2. The excavation method suitable for hard rock formation enlarged foundations of claim 1, wherein the drilling rig is a crawler-type down-the-hole drilling rig.
3. An excavation method suitable for hard rock formation extended foundations as claimed in claim 2, wherein the drill rig has a drill pipe length of 3m to 5m, and the drill rig drills holes at equal intervals along the drill hole track.
4. The excavation method suitable for hard rock formation enlarged foundation according to claim 1, wherein the determining the range of the required foundation (1) comprises: and determining the edge line of the foundation (1) by utilizing a polar coordinate method.
5. The excavation method suitable for the hard rock formation enlarged foundation according to any one of claims 1 to 4, wherein the crushing of the foundation (1) by the crusher and the removal of the crushed stone comprises:
-crushing the foundation (1) with the crusher;
loading the crushed stones into a truck by using an excavator;
transferring the crushed stone with a transport vehicle.
6. The excavation method suitable for the hard rock stratum enlarged foundation according to claim 5, wherein the crusher is a CAT320 crusher, the excavator is a CAT320 excavator, and the transport vehicle is a dump truck.
7. The excavation method suitable for hard rock formation enlarged foundation according to any one of claims 1 to 4, wherein the partially grinding the broken foundation (1) to ensure that the foundation (1) is flat comprises: and (3) locally polishing and leveling the broken foundation (1) by manually holding the polishing device.
8. An excavation method suitable for hard rock formation extended foundations as claimed in claim 7, wherein the grinding means is a pneumatic pick or an electric pick.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110648595.1A CN113279422A (en) | 2021-06-10 | 2021-06-10 | Excavation method suitable for hard rock stratum enlarged foundation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110648595.1A CN113279422A (en) | 2021-06-10 | 2021-06-10 | Excavation method suitable for hard rock stratum enlarged foundation |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113279422A true CN113279422A (en) | 2021-08-20 |
Family
ID=77284172
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110648595.1A Pending CN113279422A (en) | 2021-06-10 | 2021-06-10 | Excavation method suitable for hard rock stratum enlarged foundation |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113279422A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114381999A (en) * | 2022-02-21 | 2022-04-22 | 中交投资南京有限公司 | Construction method for efficiently crushing stone roadbed |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU94045619A (en) * | 1994-12-30 | 1996-10-10 | Забайкальский комплексный научно-исследовательский институт Роскомнедра РФ | Method for breakage of rocks |
| CN103615008A (en) * | 2013-10-25 | 2014-03-05 | 宇杰集团股份有限公司 | Construction method of cutting and excavation of stone of station room foundation of ultra-long and ultra-high-elevation difference single-span type cableway |
| CN106194193A (en) * | 2016-07-25 | 2016-12-07 | 长江三峡勘测研究院有限公司（武汉） | The auxiliary excavation method of a kind of group hole, big cross section vertical shaft non-explosion large aperture |
| CN107217674A (en) * | 2017-05-10 | 2017-09-29 | 山西四建集团有限公司 | Cubic meter of stone foundation ditch enters rock non-explosive excavation construction method |
| CN107740418A (en) * | 2017-09-20 | 2018-02-27 | 中建四局第六建筑工程有限公司 | A kind of construction method excavated for rock vertical wall of deep foundation pit |
| CN109629590A (en) * | 2017-10-09 | 2019-04-16 | 上海宝冶集团有限公司 | The construction method of Rock Region building pile foundation cushion cap |
-
2021
- 2021-06-10 CN CN202110648595.1A patent/CN113279422A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU94045619A (en) * | 1994-12-30 | 1996-10-10 | Забайкальский комплексный научно-исследовательский институт Роскомнедра РФ | Method for breakage of rocks |
| CN103615008A (en) * | 2013-10-25 | 2014-03-05 | 宇杰集团股份有限公司 | Construction method of cutting and excavation of stone of station room foundation of ultra-long and ultra-high-elevation difference single-span type cableway |
| CN106194193A (en) * | 2016-07-25 | 2016-12-07 | 长江三峡勘测研究院有限公司（武汉） | The auxiliary excavation method of a kind of group hole, big cross section vertical shaft non-explosion large aperture |
| CN107217674A (en) * | 2017-05-10 | 2017-09-29 | 山西四建集团有限公司 | Cubic meter of stone foundation ditch enters rock non-explosive excavation construction method |
| CN107740418A (en) * | 2017-09-20 | 2018-02-27 | 中建四局第六建筑工程有限公司 | A kind of construction method excavated for rock vertical wall of deep foundation pit |
| CN109629590A (en) * | 2017-10-09 | 2019-04-16 | 上海宝冶集团有限公司 | The construction method of Rock Region building pile foundation cushion cap |
Non-Patent Citations (1)
| Title |
|---|
| 李聚方: "《工程测量》", 31 December 2014, 测绘出版社 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114381999A (en) * | 2022-02-21 | 2022-04-22 | 中交投资南京有限公司 | Construction method for efficiently crushing stone roadbed |
| CN114381999B (en) * | 2022-02-21 | 2022-09-02 | 中交投资南京有限公司 | Construction method for efficient broken stone roadbed |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109026019B (en) | Method for hydraulic grinding drilling non-blasting stone square hole excavation construction | |
| CN108729924B (en) | Quick construction method for mechanical excavation of urban hard rock tunnel | |
| AU2021201302A1 (en) | Process for exposing underground utilities | |
| CN113279422A (en) | Excavation method suitable for hard rock stratum enlarged foundation | |
| CN111577118B (en) | Mechanical rapid hole forming construction method for slide-resistant pile | |
| CN109958448B (en) | Rock breaking method for composite stratum pipe jacking construction | |
| CN116220546A (en) | Construction method for combining super-thick hard rock condition large-diameter long piles into holes | |
| KR101549399B1 (en) | Safety test method for checking of underground facilities | |
| CN112196494B (en) | Construction process and construction equipment for geological pipeline jointed between rock and soil layer | |
| US3998493A (en) | Combined milling and impact apparatus for tunneling | |
| JP2005119620A (en) | Crawler traveling type construction working vehicle | |
| CN114198015A (en) | Down-the-hole hammer-rotary drilling combined hole forming method for hard rock pile | |
| US10801265B1 (en) | Combination coring machine and vacuum excavation rig | |
| CN109522623B (en) | High-strength rock splitting method and splitting device based on weak surface | |
| CN112324441A (en) | Construction method for removing underground shield segments by full-slewing drilling machine | |
| RU2252984C2 (en) | Railway bed grading method and laser measuring device | |
| JP4466878B2 (en) | Excavation method | |
| JP3302282B2 (en) | How to prevent the fall of Mt. | |
| CN113404496B (en) | Construction method of limited space ultra-deep shaft | |
| CN112814623B (en) | Method for treating abandoned oil well mouth in soft mud layer | |
| CN216665625U (en) | To dumping system | |
| CN115143318A (en) | Treatment method for incapability of drilling of jacking pipe in sand gravel layer jacking pipe construction process | |
| AU2014101360B4 (en) | Process for exposing underground utilities | |
| JP2009257013A (en) | Device for mounting casing and laying construction method for buried substance | |
| CN114961576A (en) | Pile forming method and drill bit for high-pressure water jet large-diameter expanded-bottom rock-socketed pile |
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 | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20210820 |