CN110185413A - A method of stable slip casting channel is formed on easy collapse hole stratum - Google Patents
A method of stable slip casting channel is formed on easy collapse hole stratum Download PDFInfo
- Publication number
- CN110185413A CN110185413A CN201910444528.0A CN201910444528A CN110185413A CN 110185413 A CN110185413 A CN 110185413A CN 201910444528 A CN201910444528 A CN 201910444528A CN 110185413 A CN110185413 A CN 110185413A
- Authority
- CN
- China
- Prior art keywords
- drill bit
- slip casting
- centrum
- drill
- pvc pipe
- 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
- 238000007569 slipcasting Methods 0.000 title claims abstract description 29
- 238000000034 method Methods 0.000 title claims abstract description 23
- 238000005553 drilling Methods 0.000 claims abstract description 35
- 239000002689 soil Substances 0.000 claims abstract description 23
- 239000002002 slurry Substances 0.000 claims description 9
- 239000002390 adhesive tape Substances 0.000 claims description 3
- 230000005484 gravity Effects 0.000 claims description 3
- 238000010276 construction Methods 0.000 abstract description 19
- 230000003014 reinforcing effect Effects 0.000 abstract description 13
- 238000000151 deposition Methods 0.000 abstract description 4
- 239000004570 mortar (masonry) Substances 0.000 abstract description 4
- 238000004064 recycling Methods 0.000 abstract description 3
- 239000000463 material Substances 0.000 abstract description 2
- 238000005728 strengthening Methods 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 3
- 238000000605 extraction Methods 0.000 description 2
- 241001074085 Scophthalmus aquosus Species 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000284 extract Substances 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 239000011505 plaster Substances 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000004062 sedimentation Methods 0.000 description 1
- 210000004911 serous fluid Anatomy 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 238000004078 waterproofing Methods 0.000 description 1
Classifications
-
- 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
- E21B1/00—Percussion drilling
-
- 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
- E21B10/00—Drill bits
-
- 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
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/10—Sealing or packing boreholes or wells in the borehole
- E21B33/13—Methods or devices for cementing, for plugging holes, crevices or the like
Landscapes
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Mechanical Engineering (AREA)
- Earth Drilling (AREA)
Abstract
A method of stable slip casting channel is formed on easy collapse hole stratum, belong to boring grouting reinforcing technical field, it can solve the problems, such as that construction method is cumbersome in loose earth reinforcing and strengthening quality cannot be guaranteed, using impact drill, original drill bit is replaced with prefabricated simple drill bit to creep into designated depth, first along the prefabricated PVC Grouting Pipe of drilling rod lowered inside (on top to prefabricated drill bit), then so that simple drill bit is fallen off in the soil body while pulling up drilling rod, realize disposable and drilling rod the recycling of simple drill bit.Pvc pipe at this time can be used as stablizing slip casting channel.This construction method avoids soft stratum influence caused by pore-forming, it is not necessarily to consider collapse hole problem as slip casting channel using the prefabricated PVC Grouting Pipe being embedded in the soil body, construction efficiency is substantially increased, the quality of subsequent mortar depositing construction is also improved, while also saving a large amount of manpower, material resources and financial resources.
Description
Technical field
The invention belongs to boring grouting reinforcing technical fields, and in particular to one kind forms stable slip casting on easy collapse hole stratum and leads to
The method in road, the construction environment of loose suitable for the soil body, easy collapse hole difficulty pore-forming.
Background technique
Boring grouting reinforcing is exactly to inject in loose structure grouting serous fluid by pore-creating, so that slurries is existed by grouting pressure
It is spread in the gap of loose earth or crack rock, soil body gap is filled, reinforcing and reinforcement effect are played.Slurries exist
An entirety can be formed with surrounding soil after weak part solidification, improve the compactness and bearing capacity of soil, also can be improved
The globality of soft regions achievees the purpose that reduce differential settlement or waterproofing and leakage-stopping.
General bored grouting process flow are as follows: drilling machine drills in predetermined position to designated depth → extraction drilling tool → decentralization
Grouting Pipe → sealing of hole and slip casting → inspection grouting and reinforcing achievement.Since boring grouting reinforcing method needs first to drill to designated depth,
Formed and stable drilling (i.e. slip casting channel) and then carry out slip casting operation again, have in this way for the stability of geological conditions
Certain to require, grouting and reinforcing method applies in general to the stable compact earth of geological conditions.
But be frequently necessary to reinforce loose earth in practical projects, such as carry out grouting and reinforcing to backfill,
Since its is loosely organized, globality poor, generally it is difficult to stablize pore-forming, often drilling finishes and will occur while extracting drilling tool
Collapse hole, it is difficult to transfer Grouting Pipe in the borehole and carry out mortar depositing construction.
It is difficult to form the method stablized the case where drilling and used holing with slurry wall protection in the past for this, i.e., in drilling process
It is middle using mud pressure maintain hole wall stablize, formed stablize drilling after injection cement slurry displace mud and to soil body gap into
Row filling.
Such construction method construction procedure is cumbersome, a large amount of mud of generation are not easy to handle, and if mortar depositing construction
Purpose, then a large amount of slurries, which impact the soil body, may occur more serious sedimentation, not only can for water blockoff leakproof
Extend the duration, the quality of grouting and reinforcing also cannot be guaranteed, and also consume a large amount of resource.
Summary of the invention
The present invention provides one kind in easy collapse hole aiming at the problem that hole quality cannot be guaranteed in loose earth reinforcing process
The method that stratum forms stable slip casting channel, by using impact drill construction, using disposable prefabricated drill bit,
The mode of hollow drill lowered inside PVC Grouting Pipe come solve in bored grouting on the loose earth of globality poor difficulty pore-forming,
Easy collapse hole is difficult to form stable slip casting channel subsequent mortar depositing construction is caused to be difficult to the problem of carrying out.
The present invention adopts the following technical scheme:
The present invention uses the impact drill equipped with disposable prefabricated drill bit to creep into designated depth, by prefabricated PVC slip casting
Pipe abandons drill bit along drilling rod lowered inside, extracts and Recycling of drill rod, PVC Grouting Pipe can stay in formation in the soil body and stablize slip casting
Channel.Pore-forming can thus be combined with two steps of slip casting, be avoided because collapse hole or hole quality difference are to slip casting
Construction causes to hinder.
Due to using prefabricated simple drill bit and the only once use of the drill bit when drilling, it is only necessary to be inserted on hollow drill i.e.
It can.It is to be drilled to proceed to designated depth, it transfers prefabricated PVC Grouting Pipe and pulls up drilling rod later, drill bit will be because of soil body frictional force and drilling rod
It is detached from, stable slip casting channel is also formed while drilling rod is smoothly withdrawn.
A method of stable slip casting channel being formed on easy collapse hole stratum, is included the following steps:
The first step prepares prefabricated centrum drill bit, hollow drill and pvc pipe respectively, wherein the top of centrum drill bit be equipped with it is hollow
The cylindrical body of drilling rod connection, the diameter d of cylindrical body1Less than the internal diameter D of hollow drill1, the maximum of the tapered segment of centrum drill bit is directly
Diameter d2Greater than the outer diameter D of hollow drill2, and be less than the diameter D of drilling, the length L of pvc pipe is greater than drilling depth H, pvc pipe it is straight
Diameter d3Less than the diameter D of drilling；The surface of pvc pipe is equipped with the injected hole of several plum blossom-shapeds arrangement；
The cylinder body end of centrum drill bit is connect by second step with hollow drill, is crept into using drilling machine to drilling depth H；
Third step, by pvc pipe along hollow drill lowered inside, until one end of pvc pipe and centrum bit contact；
4th step, slowly promotes hollow drill, stays in pvc pipe in the soil body, and being reinforced due to gravity and easy collapse hole
The soil body is combined closely, and stable slip casting channel is formed, and centrum drill bit stays in the soil body due to the resistance of soil body frictional force and pvc pipe
In.
The injected hole is equipped with the unidirectional stop grouting plug or adhesive tape of slurries string hole plug injected hole when preventing slip casting.
The diameter d of the cylindrical body1Than the internal diameter D of hollow drill1Small 2mm.
The maximum gauge d of the tapered segment of the centrum drill bit2Than the outer diameter D of hollow drill2Big 10mm.
The length L of the pvc pipe is 20-30cm bigger than drilling depth H.
Beneficial effects of the present invention are as follows:
1. method safety of the invention is reliable, a large amount of mud will not be generated, it will not be because of a large amount of mud compared with other pore-forming modes
Slurry is washed away to be caused to corrode to soft stratum.
2. method of the invention is applicable to a variety of soft stratums, special construction equipment and special construction work are not needed
Skill, easy to operate, process is succinct, is compared with other methods and saves a large amount of manpower and material resources and fund.
3. method of the invention without considers the problems of extraction drilling tool after hole wall collapse, greatly accelerate speed of application.
Detailed description of the invention
Fig. 1 is the schematic view of the front view of centrum drill bit of the invention；
Fig. 2 is the overlooking structure diagram of centrum drill bit of the invention；
Fig. 3 is the connection schematic diagram of centrum drill bit and hollow drill and pvc pipe of the invention；
Fig. 4 is construction method schematic diagram of the invention；
Wherein: 1-PVC pipe；2- hollow drill；3- centrum drill bit；4- impact drill；5- waits reinforcing easy collapse hole stratum.
Specific embodiment
In conjunction with attached drawing, the present invention will be further described.
As shown in figure 3, in easy collapse hole or the difficult progress grouting and reinforcing at bore region, using the method for the present invention come construction of stable
Slip casting channel step it is as follows:
1. according to construction site environment and the impact drill of construction requirement selection appropriate size, the aperture D of determining drilling,
Drilling depth H has set up impact drill in target position.
2. prefabricated PVC Grouting Pipe, it is desirable that the length L of PVC Grouting Pipe is 20-30cm longer than drilling depth H to be convenient for setting with slip casting
Standby connection, and the maximum gauge d of PVC Grouting Pipe (including connecting portion between pipe)3Less than bore diameter D.In PVC slip casting pipe surface
Injected hole is arranged according to plum blossom-shaped, is stuck on a piece of adhesive tape on each injected hole, it is desirable that adhesive plaster size is slightly larger than set injected hole.
3. prefabricated disposable centrum drill bit, it is desirable that the column part diameter d of prefabricated drill bit1It is slightly less than the interior of hollow drill
Diameter D1(usually 2mm smaller than internal diameter), it is desirable that tapered segment maximum gauge d2Greater than the outer diameter D of hollow drill2(usually than outer
The big 10mm of diameter) and it is less than bore diameter D.
4. starting to creep into target point after centrum drill bit and hollow drill are attached.
5. after drilling to designated depth H, transferring prefabricated PVC Grouting Pipe, prefabricated PVC Grouting Pipe withstands on centrum brill
On head, the decentralization depth of prefabricated PVC Grouting Pipe is about drilling depth H at this time.
6. slowly promoting hollow drill, stay in prefabricated PVC Grouting Pipe in the soil body and due to gravity and easy collapse hole
It is reinforced the soil body to combine closely, centrum drill bit is stayed in the soil body due to the resistance of soil body frictional force and prefabricated PVC Grouting Pipe.
7. after completing above-mentioned steps, the PVC Grouting Pipe in the soil body stablizes slip casting channel required for being.Subsequent note
Slurry construction can stablize progress in this slip casting channel, without considering collapse hole problem.
Wherein, centrum drill bit replaces the drill bit of former impact drill, and is directly inserted on hollow drill, do not use bolt or
Person's other modes are fixed, to achieve the purpose that abandon centrum drill bit, Recycling of drill rod.
Claims (3)
1. a kind of method for forming stable slip casting channel on easy collapse hole stratum, characterized by the following steps:
The first step prepares prefabricated centrum drill bit (3), hollow drill (2) and pvc pipe (1), wherein the top of centrum drill bit (3) respectively
Portion is equipped with the cylindrical body connecting with hollow drill (2), the diameter d of cylindrical body1Less than the internal diameter D of hollow drill (2)1, centrum drill bit
(3) the maximum gauge d of tapered segment2Greater than the outer diameter D of hollow drill (2)2, and it is less than the diameter D of drilling, pvc pipe (1)
Length L is greater than drilling depth H, the diameter d of pvc pipe (1)3Less than the diameter D of drilling；The surface of pvc pipe (1) is equipped with several plum blossoms
The injected hole of shape arrangement；
The cylinder body end of centrum drill bit (3) is connect with hollow drill (2), is crept into using drilling machine to drilling depth H by second step；
Pvc pipe (1) is protruded into drilling inside hollow drill (2) until the one end of pvc pipe (1) connects with centrum drill bit by third step
Touching；
4th step slowly promotes hollow drill (2), stays in pvc pipe (1) in the soil body, and due to gravity and easy collapse hole
It is reinforced the soil body to combine closely, forms stable slip casting channel, resistance of the centrum drill bit (3) due to soil body frictional force and pvc pipe (1)
Power stays in the soil body.
2. a kind of method for forming stable slip casting channel on easy collapse hole stratum according to claim 1, it is characterised in that: institute
State unidirectional stop grouting plug or adhesive tape that injected hole is equipped with slurries string hole plug injected hole when preventing slip casting.
3. a kind of method for forming stable slip casting channel on easy collapse hole stratum according to claim 1, it is characterised in that: institute
State the diameter d of cylindrical body1Than the internal diameter D of hollow drill (2)1Small 2mm, the maximum gauge of the tapered segment of the centrum drill bit (3)
d2Than the outer diameter D of hollow drill (2)2Big 10mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910444528.0A CN110185413A (en) | 2019-05-27 | 2019-05-27 | A method of stable slip casting channel is formed on easy collapse hole stratum |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910444528.0A CN110185413A (en) | 2019-05-27 | 2019-05-27 | A method of stable slip casting channel is formed on easy collapse hole stratum |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110185413A true CN110185413A (en) | 2019-08-30 |
Family
ID=67717870
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910444528.0A Pending CN110185413A (en) | 2019-05-27 | 2019-05-27 | A method of stable slip casting channel is formed on easy collapse hole stratum |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110185413A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110778275A (en) * | 2019-11-20 | 2020-02-11 | 河南宝龙源检测技术有限公司 | Reaming steel chisel and reaming method applied to same |
| CN112081109A (en) * | 2020-09-07 | 2020-12-15 | 江苏省建筑工程集团有限公司 | Grouting pipe embedding device |
| CN113882806A (en) * | 2021-12-01 | 2022-01-04 | 北京科技大学 | Retractable mesh-shaped hole protection piece, installation method of hole protection piece and hole protection method |
| CN114033317A (en) * | 2021-11-26 | 2022-02-11 | 上海宝冶集团有限公司 | Drilling is sent pipe and is annotated shell material integrative improvement drilling rod device |
| CN114837607A (en) * | 2022-04-27 | 2022-08-02 | 中煤科工开采研究院有限公司 | Grouting reinforcement construction process |
| CN116448624A (en) * | 2023-06-16 | 2023-07-18 | 山东省鲁南地质工程勘察院(山东省地质矿产勘查开发局第二地质大队) | Soil stratum pollutant monitoring system and method |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2522608Y (en) * | 2001-12-28 | 2002-11-27 | 中国石油集团地球物理勘探局 | Disposable series drill bit and joint for oil exploration and geologic prospecting probing rig |
| CN102926770A (en) * | 2012-11-08 | 2013-02-13 | 中国神华能源股份有限公司 | Underground draining and grouting process in thin bedrock and thick loose sand layer rich water areas |
| CN103410145A (en) * | 2013-08-16 | 2013-11-27 | 郭红标 | Disposable anchor cable bit and construction method thereof |
| CN104674803A (en) * | 2013-12-03 | 2015-06-03 | 武汉地质勘察基础工程有限公司 | Rotary jetting anchor cable construction drill bit |
| CN105064356A (en) * | 2015-08-07 | 2015-11-18 | 青岛理工大学 | Prestressed composite rod cable anchoring device for supporting soft loose soil body |
| CN204877304U (en) * | 2015-06-11 | 2015-12-16 | 东北石油大学 | Disposable drill bit and joint |
| CN105735899A (en) * | 2016-04-12 | 2016-07-06 | 苏州市能工基础工程有限责任公司 | Drum drill for drilling anchor rod |
| CN106437801A (en) * | 2016-11-25 | 2017-02-22 | 中国矿业大学 | Expandable self-anchored reaming anchor arm and support and protection method thereof |
| CN106930285A (en) * | 2017-05-05 | 2017-07-07 | 浙江坤德创新岩土工程有限公司 | A kind of pressure-bearing type boulder and cobble soil layer enlarging anchor rod and its construction method |
| CN107120058A (en) * | 2017-06-19 | 2017-09-01 | 中冶成都勘察研究总院有限公司 | It is a kind of to be used for gravelly soil, the pore-forming grouting method of viscous soil horizon |
-
2019
- 2019-05-27 CN CN201910444528.0A patent/CN110185413A/en active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2522608Y (en) * | 2001-12-28 | 2002-11-27 | 中国石油集团地球物理勘探局 | Disposable series drill bit and joint for oil exploration and geologic prospecting probing rig |
| CN102926770A (en) * | 2012-11-08 | 2013-02-13 | 中国神华能源股份有限公司 | Underground draining and grouting process in thin bedrock and thick loose sand layer rich water areas |
| CN103410145A (en) * | 2013-08-16 | 2013-11-27 | 郭红标 | Disposable anchor cable bit and construction method thereof |
| CN104674803A (en) * | 2013-12-03 | 2015-06-03 | 武汉地质勘察基础工程有限公司 | Rotary jetting anchor cable construction drill bit |
| CN204877304U (en) * | 2015-06-11 | 2015-12-16 | 东北石油大学 | Disposable drill bit and joint |
| CN105064356A (en) * | 2015-08-07 | 2015-11-18 | 青岛理工大学 | Prestressed composite rod cable anchoring device for supporting soft loose soil body |
| CN105735899A (en) * | 2016-04-12 | 2016-07-06 | 苏州市能工基础工程有限责任公司 | Drum drill for drilling anchor rod |
| CN106437801A (en) * | 2016-11-25 | 2017-02-22 | 中国矿业大学 | Expandable self-anchored reaming anchor arm and support and protection method thereof |
| CN106930285A (en) * | 2017-05-05 | 2017-07-07 | 浙江坤德创新岩土工程有限公司 | A kind of pressure-bearing type boulder and cobble soil layer enlarging anchor rod and its construction method |
| CN107120058A (en) * | 2017-06-19 | 2017-09-01 | 中冶成都勘察研究总院有限公司 | It is a kind of to be used for gravelly soil, the pore-forming grouting method of viscous soil horizon |
Non-Patent Citations (1)
| Title |
|---|
| 董书宁 等主编: "《煤炭安全高效开采地质保障技术及应用》", 30 September 2014, 煤炭工业出版社 * |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110778275A (en) * | 2019-11-20 | 2020-02-11 | 河南宝龙源检测技术有限公司 | Reaming steel chisel and reaming method applied to same |
| CN112081109A (en) * | 2020-09-07 | 2020-12-15 | 江苏省建筑工程集团有限公司 | Grouting pipe embedding device |
| CN114033317A (en) * | 2021-11-26 | 2022-02-11 | 上海宝冶集团有限公司 | Drilling is sent pipe and is annotated shell material integrative improvement drilling rod device |
| CN113882806A (en) * | 2021-12-01 | 2022-01-04 | 北京科技大学 | Retractable mesh-shaped hole protection piece, installation method of hole protection piece and hole protection method |
| CN113882806B (en) * | 2021-12-01 | 2022-03-11 | 北京科技大学 | Retractable mesh-shaped hole protection piece, installation method of hole protection piece and hole protection method |
| CN114837607A (en) * | 2022-04-27 | 2022-08-02 | 中煤科工开采研究院有限公司 | Grouting reinforcement construction process |
| CN114837607B (en) * | 2022-04-27 | 2024-04-05 | 中煤科工开采研究院有限公司 | Grouting reinforcement construction process |
| CN116448624A (en) * | 2023-06-16 | 2023-07-18 | 山东省鲁南地质工程勘察院(山东省地质矿产勘查开发局第二地质大队) | Soil stratum pollutant monitoring system and method |
| CN116448624B (en) * | 2023-06-16 | 2023-09-29 | 山东省鲁南地质工程勘察院(山东省地质矿产勘查开发局第二地质大队) | Soil stratum pollutant monitoring system and method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110185413A (en) | A method of stable slip casting channel is formed on easy collapse hole stratum | |
| CN101122130B (en) | Construction method of drilling follow casting pile used for building or bridge foundation | |
| CN102691296B (en) | Pipe pile foundation for static-pressure grouting on pile side and rotary jet grouting at pile bottom and construction method thereof | |
| CN102444118A (en) | Construction method for grouting reinforcement of sleeve valve pipe | |
| CN106761474B (en) | A kind of the full-sleeve engineering method steel sleeve and its construction method of the soil that can actively muck haulage | |
| CN102852141B (en) | Rock-socketed pipe pile foundation with pile core by concrete pouring and pile side by static pressure grouting and construction method for rock-socketed pipe pile foundation | |
| CN107975375B (en) | A kind of miniature steel pipe pile reinforced soft foundation construction method of city tunnel | |
| CN101749024B (en) | Pipe-pulling construction method of underground buried box culvert | |
| CN107605498A (en) | Rich water sand-pebble layer shield tunnel termination horizontal grouting ruggedized construction construction method | |
| CN105780763A (en) | Construction method of medium-hole vibrating casing wall protection type long spiral cast-in-situ bored pile | |
| CN109026097A (en) | A kind of double drill bit drilling construction methods of anti-float anchor rod | |
| CN109057716A (en) | One kind having water jetting at high pressure stream pore-forming rotary digging drill bit and its construction method | |
| CN103031847B (en) | Reducing overlap joint combined type orifice pipe grouting method | |
| CN107313744A (en) | A kind of small guide hole grouting and reinforcing coal bed gas well passes through the construction method in goaf | |
| CN103526754A (en) | Method for constructing head-expanded anchoring rod in sand-rich decomposed rock | |
| CN203569561U (en) | Novel pile forming device of steel pipe protection wall cast-in-place piles following up drill | |
| CN207406345U (en) | Rich water sand-pebble layer shield tunnel end horizontal grouting ruggedized construction | |
| CN108677959A (en) | A kind of grouting tube and grouting construction method suitable for mortar depositing construction under the conditions of limited space | |
| CN1995689B (en) | Pile forming method of pile forming mechanism with gyro bit | |
| CN101251020A (en) | Subsection hole-drilling repeatedly slip-casting method | |
| CN101100858A (en) | Construction method for drilling tool center pumping concrete post mudjack concrete pouring pile and construction device thereof | |
| CN107447755A (en) | A kind of anchor pole equipment and armature boring construction method | |
| CN101245597A (en) | Breast wall type cast-in-situ bored pile construction method and pile machine | |
| CN106120714A (en) | A kind of device improving hollow pile bearing capacity and using method thereof | |
| CN205713982U (en) | A kind of pile foundation construction drilling equipment being applicable to karst area |
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 |
Application publication date: 20190830 |
|
| RJ01 | Rejection of invention patent application after publication |