CN104988815A - Method for treating post-construction settlement disease of railroad bed - Google Patents
Method for treating post-construction settlement disease of railroad bed Download PDFInfo
- Publication number
- CN104988815A CN104988815A CN201510386505.0A CN201510386505A CN104988815A CN 104988815 A CN104988815 A CN 104988815A CN 201510386505 A CN201510386505 A CN 201510386505A CN 104988815 A CN104988815 A CN 104988815A
- Authority
- CN
- China
- Prior art keywords
- settlement
- construction
- grouting
- grouting pipe
- treatment 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
Classifications
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01B—PERMANENT WAY; PERMANENT-WAY TOOLS; MACHINES FOR MAKING RAILWAYS OF ALL KINDS
- E01B2/00—General structure of permanent way
- E01B2/006—Deep foundation of tracks
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01B—PERMANENT WAY; PERMANENT-WAY TOOLS; MACHINES FOR MAKING RAILWAYS OF ALL KINDS
- E01B2204/00—Characteristics of the track and its foundations
- E01B2204/03—Injecting, mixing or spraying additives into or onto ballast or underground
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01B—PERMANENT WAY; PERMANENT-WAY TOOLS; MACHINES FOR MAKING RAILWAYS OF ALL KINDS
- E01B2204/00—Characteristics of the track and its foundations
- E01B2204/08—Deep or vertical foundation
Landscapes
- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
- Railway Tracks (AREA)
Abstract
The invention discloses a method for treating a post-construction settlement disease of a railroad bed. A vertical plastic laying penetration-resistant technology is adopted to be matched with a side radiation grouting technology, and a fracturing grouting technology is used for reinforcing a road bed soil layer generating post-construction settlement. The specific construction method comprises the following steps of (1), construction preparation, (2), vertical groove digging, (3), vertical plastic film laying, (4), road bed side slope side drilling, and grouting pipe inserting, (5), filling of a peripheral gap of a grouting tube in a road bed portion, and (6) side fracturing grouting and reinjection. The side radiation grouting technology is ingeniously combined with the vertical plastic penetration resistant technology, and the method for treating the post-construction settlement disease of the railroad bed is obtained; on the premise that normal running of a railway is not affected, the post-construction settlement problem of the railroad bed can be effectively and thoroughly solved, and the peripheral environment cannot be affected; in addition, the method has the beneficial effects of being small in occupied construction plant, high in anti-jamming capability, shorter in construction time and the like.
Description
Technical field
The present invention relates to a kind of Settlement of Railway Roadbed Defects Treatment method, belong to railway construction technical field of construction.
Background technology
The settlement after construction of railway bed can produce a very large impact the normal operation of railway, and high-speed railway is more strict to the requirement of settlement after construction.Repair for producing the railway bed of settlement after construction, if remove rail and roadbed, Ground Treatment again, although effectively ground can be repaired, this method consuming time very long, engineering quantity large and affect the normal operation of railway.
In order to not affect the normal operation of railway, the common method for the railway settlement Control that is open to traffic fills out pinner slag to raise rail at settling section.But the method fundamentally can not solve the settlement issues of railway bed, major defect is: the intensity producing the mollisol of settlement after construction is not increased, and the rock ballast of blow-out patch again can as new load, in the soil body of roadbed, create new subsidiary stress, cause again the Compression Settlement that roadbed is new.
In order to solve Settlement of Railway Roadbed problem better, be badly in need of, not affecting under the prerequisite that railway normally runs, proposing a kind of construction method of fundamentally reinforcing the railway bed that has been open to traffic.
Summary of the invention
For solving the deficiencies in the prior art, the object of the present invention is to provide a kind of Settlement of Railway Roadbed Defects Treatment method, fundamentally solving the problem of Settlement of Railway Roadbed.
In order to realize above-mentioned target, the present invention adopts following technical scheme:
Settlement of Railway Roadbed Defects Treatment method, vertical plastic spreading seepage control technique is adopted to coordinate antenna with side radiation direction slurry injection technique, utilize fracture grouting technique to reinforce the roadbed soil layer producing settlement after construction, concrete construction method comprises the following steps: (1), preparation of construction; (2), vertically groove is excavated; (3), vertical plastic foil is laid; (4), roadbed side slope flank hole, insert Grouting Pipe; (5), embankment part Grouting Pipe periphery space is filled; (6), side direction fracture grouting, recharge.
Wherein, the preparation of construction of step (1) comprising: personnel's preparation, smooth location, excavation gutter and surveying and locating.The object of this step is to enable that the machines such as rig are placed steadily, grout and interstitial water can be discharged in time, keep place dry, accurately find bore position and excavation grooved position.
Its excavation position of the vertical excavation groove of step (2) should apart from side slope of embankment 1-2m, and its cutting depth should exceed side direction slip casting about degree of depth 1m, adopts trench digging groover that is rotary, reciprocating or scraping board type to carry out vertical ditching operation.
In order to improve operating efficiency, the vertical trench scouring machine device that the vertical plastic foil installation apparatus of step (3) follows step (2) carries out plastic foil laying, connect with nylon rope between polylith plastic foil, lay geotextiles below plastic foil in case scratch.
Preferably, in step (4), adopt mud off inclined drilling pore-forming, drilling depth should reach the roadbed soil layer producing settlement after construction, insert Grouting Pipe immediately after boring terminates, guarantee that Grouting Pipe is at the bottom of hole, and make Grouting Pipe be positioned at the center of boring, when Grouting Pipe by water buoyancy effect in hole cannot at the bottom of hole time, then to injected clear water in Grouting Pipe to overcome buoyancy.
Further, in step (5), after inserting Grouting Pipe, adopt the periphery space of Concrete Filled embankment part Grouting Pipe immediately, with wooden stick, concrete is forced to pour into Grouting Pipe periphery space, compacting of vibrating in filling process.
In step (6), slip casting is started again after the concrete of filling until step (5) has intensity, grouting pressure and grouting amount is controlled according to railway ground settling amount size in slip casting process, strict control serum density and slip casting time, to make rail reach appointment absolute altitude, rinse grouting port with clear water after slip casting and cover suitable for reading.
Further, Settlement of Railway Roadbed Defects Treatment method of the present invention also comprises step (7), whether detection road foundation height mark is up to standard: if not up to standard, continues to repeat slip casting; If up to standard, cement mortar is adopted to recharge Grouting Pipe.
Antenna with side radiation direction slurry injection technique a kind ofly takies that construction plant is little, antijamming capability is strong, the engineering time is shorter and does not affect the soil stabilization technology that superstructure runs, but because the seepage channel in the soil body is complicated in practice of construction, the slurries often having quite a few are emerged from the extraneous region of roadbed, and soil stabilization is unsatisfactory and cause certain pollution to Soil Surrounding.
Antenna with side radiation direction slurry injection technique combines with vertical plastic spreading seepage control technique by the present invention dexterously, obtain a kind of Settlement of Railway Roadbed Defects Treatment method, not affecting under the prerequisite that railway normally runs, can effectively fundamentally solve Settlement of Railway Roadbed problem and can not have an impact to surrounding enviroment; In addition, the present invention also has advantages such as taking that construction plant is little, antijamming capability is strong, the engineering time is shorter.
Accompanying drawing explanation
Fig. 1 is the generalized section of Settlement of Railway Roadbed Defects Treatment method of the present invention.
The implication of Reference numeral in figure: 1, Grouting Pipe, 2, plastic foil, 3, roadbed, 4, the soil body.
Detailed description of the invention
Below in conjunction with the drawings and specific embodiments, concrete introduction is done to the present invention.
See Fig. 1, Settlement of Railway Roadbed Defects Treatment method of the present invention adopts vertical plastic spreading seepage control technique to coordinate antenna with side radiation direction slurry injection technique, utilizes fracture grouting technique to reinforce the roadbed soil layer producing settlement after construction.
Concrete construction method comprises the following steps:
(1), preparation of construction: personnel's preparation, smooth location, excavation gutter and surveying and locating.The object of this step is to enable that the machines such as rig are placed steadily, grout and interstitial water can be discharged in time, keep place dry, accurately find bore position and excavation grooved position.
(2), vertically groove is excavated: its excavation position should apart from side slope of embankment 1-2m, and its cutting depth should exceed side direction slip casting about degree of depth 1m, adopts trench digging groover that is rotary, reciprocating or scraping board type to carry out vertical ditching operation.
(3), vertical plastic foil 2 lays: after gash depth excavates and relates to requirement, carry out the laying work of plastic foil 2.In order to improve operating efficiency, vertical plastic foil 2 installation apparatus is arranged on after groover, follows while groover advances and lays plastic foil 2.It should be noted that plastic foil 2 should all not imbedded in the soil body 4, reserve certain altitude, and fasten with soil block, connect between polylith plastic foil 2 with nylon rope on top, plastic foil 2 lays geotextiles below in case scratch.
(4), roadbed 3 side slope flank hole, insert Grouting Pipe 1: adopt mud off inclined drilling pore-forming, drilling depth should reach the roadbed soil layer producing settlement after construction, Grouting Pipe 1 is inserted immediately after boring terminates, guarantee that Grouting Pipe 1 is at the bottom of hole, and make Grouting Pipe 1 be positioned at the center of boring, when Grouting Pipe 1 by water buoyancy effect in hole cannot at the bottom of hole time, then to injected clear water in Grouting Pipe 1 to overcome buoyancy.Will make a record in drilling process, ensure that drilling quality meets designing requirement, and inspection creeps into situation, for slip casting operation provides reference data at any time.
(5), embankment part Grouting Pipe 1 periphery space is filled: consider slip casting effect and embankment stability, the periphery space of Concrete Filled embankment part Grouting Pipe 1 is adopted immediately after inserting Grouting Pipe 1, with wooden stick, concrete is forced to pour into Grouting Pipe 1 periphery space, compacting of vibrating in filling process.
(6), side direction fracture grouting, recharge: after the concrete of filling until step (5) has some strength, start slip casting again, grouting pressure and grouting amount is controlled according to railway ground settling amount size in slip casting process, strict control serum density and slip casting time, appointment absolute altitude is reached to make rail, rinse grouting port with clear water after slip casting and cover suitable for reading, to carry out when slip casting is defective repeating construction.
Further improve as the present invention, method of the present invention also comprises step (7), whether detection roadbed 3 absolute altitude is up to standard: if not up to standard, continues to repeat slip casting; If up to standard, cement mortar is adopted to recharge Grouting Pipe 1.
To sum up, antenna with side radiation direction slurry injection technique combines with vertical plastic spreading seepage control technique by the present invention dexterously, obtain a kind of Settlement of Railway Roadbed Defects Treatment method, not affecting under the prerequisite that railway normally runs, can effectively fundamentally solve railway bed 3 settlement after construction problem and can not have an impact to surrounding enviroment; In addition, the present invention also has advantages such as taking that construction plant is little, antijamming capability is strong, the engineering time is shorter.
More than show and describe general principle of the present invention, principal character and advantage.The technician of the industry should understand, and above-described embodiment does not limit the present invention in any form, the technical scheme that the mode that all employings are equal to replacement or equivalent transformation obtains, and all drops in protection scope of the present invention.
Claims (10)
1. Settlement of Railway Roadbed Defects Treatment method, is characterized in that, adopts vertical plastic spreading seepage control technique to coordinate antenna with side radiation direction slurry injection technique, and utilize fracture grouting technique to reinforce the roadbed soil layer producing settlement after construction, concrete construction method comprises the following steps:
(1), preparation of construction;
(2), vertically groove is excavated;
(3), vertical plastic foil is laid;
(4), roadbed side slope flank hole, insert Grouting Pipe;
(5), embankment part Grouting Pipe periphery space is filled;
(6), side direction fracture grouting, recharge.
2. Settlement of Railway Roadbed Defects Treatment method according to claim 1, is characterized in that, the preparation of construction of described step (1) comprising: personnel's preparation, smooth location, excavation gutter and surveying and locating.
3. Settlement of Railway Roadbed Defects Treatment method according to claim 1, it is characterized in that, its excavation positional distance side slope of embankment of the vertical excavation groove of described step (2) 1-2m, its cutting depth should exceed side direction slip casting degree of depth 1m, adopts trench digging groover that is rotary, reciprocating or scraping board type to carry out vertical ditching operation.
4. Settlement of Railway Roadbed Defects Treatment method according to claim 3, it is characterized in that, the vertical plastic foil of described step (3) is laid the vertical excavation groove of following step (2) and is carried out, connect with nylon rope between polylith plastic foil, below plastic foil, lay geotextiles.
5. Settlement of Railway Roadbed Defects Treatment method according to claim 1, it is characterized in that, in described step (4), adopt mud off inclined drilling pore-forming, drilling depth should reach the roadbed soil layer producing settlement after construction, insert Grouting Pipe immediately after boring terminates, guarantee that Grouting Pipe is at the bottom of hole, and make Grouting Pipe be positioned at the center of boring.
6. Settlement of Railway Roadbed Defects Treatment method according to claim 5, is characterized in that, when Grouting Pipe by water buoyancy effect in hole cannot at the bottom of hole time, then to injected clear water in Grouting Pipe to overcome buoyancy.
7. Settlement of Railway Roadbed Defects Treatment method according to claim 1, it is characterized in that, in described step (5), adopt the periphery space of Concrete Filled embankment part Grouting Pipe, with wooden stick, concrete is forced to pour into Grouting Pipe periphery space, compacting of vibrating.
8. Settlement of Railway Roadbed Defects Treatment method according to claim 1, it is characterized in that, in described step (6), slip casting is started again after the concrete of filling until step (5) has intensity, record grouting pressure and grouting amount in slip casting process, rinse grouting port with clear water after slip casting and cover suitable for reading.
9. the Settlement of Railway Roadbed Defects Treatment method according to any one of claim 1-8, is characterized in that, also comprises step (7), whether detection road foundation height mark is up to standard.
10. Settlement of Railway Roadbed Defects Treatment method according to claim 9, is characterized in that, in described step (7), if not up to standard, continues to repeat slip casting; If up to standard, cement mortar is adopted to recharge Grouting Pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510386505.0A CN104988815A (en) | 2015-07-03 | 2015-07-03 | Method for treating post-construction settlement disease of railroad bed |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510386505.0A CN104988815A (en) | 2015-07-03 | 2015-07-03 | Method for treating post-construction settlement disease of railroad bed |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104988815A true CN104988815A (en) | 2015-10-21 |
Family
ID=54300698
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510386505.0A Pending CN104988815A (en) | 2015-07-03 | 2015-07-03 | Method for treating post-construction settlement disease of railroad bed |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104988815A (en) |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106049195A (en) * | 2016-05-27 | 2016-10-26 | 中铁三局集团有限公司 | Method for strengthening subgrade basement of existing high speed railway line |
| CN108316333A (en) * | 2018-03-28 | 2018-07-24 | 河南理工大学 | A kind of compound raft foundation of resistance to deformation and its construction method suitable for goaf building |
| CN108951307A (en) * | 2018-03-21 | 2018-12-07 | 中国铁道科学研究院铁道建筑研究所 | A kind of regulation method of ballastless track roadbed arch |
| CN110565452A (en) * | 2019-09-16 | 2019-12-13 | 中铁四院集团岩土工程有限责任公司 | Railway roadbed body steel flower tube grouting reinforcement method and railway roadbed |
| CN111719345A (en) * | 2019-03-21 | 2020-09-29 | 北京铁科特种工程技术有限公司 | Method for preventing frost damage of existing railway subgrade |
| CN112228081A (en) * | 2020-10-24 | 2021-01-15 | 中铁一局集团有限公司 | Method for reinforcing pile foundation of shield tunnel side-through high-speed rail viaduct |
| KR20210078897A (en) * | 2019-12-19 | 2021-06-29 | 신명탑건설(주) | Grouting injection reinforcement structure using slope surface of railway track and constructing method thereof |
| CN113215892A (en) * | 2021-05-26 | 2021-08-06 | 金陵科技学院 | Grouting soil arch induced pile-supported embankment |
| CN113216147A (en) * | 2021-05-11 | 2021-08-06 | 中国科学院武汉岩土力学研究所 | Soft rock roadbed longitudinal crack disease treatment method |
| CN113417185A (en) * | 2021-05-25 | 2021-09-21 | 山东高速工程建设集团有限公司 | Treatment method for rockfill subgrade void cracking |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100768777B1 (en) * | 2006-09-22 | 2007-10-19 | 임규동 | Earth reinforcement method for railway track on the concrete base |
| CN101886382A (en) * | 2010-06-22 | 2010-11-17 | 中铁第四勘察设计院集团有限公司 | Soft foundation reinforcing method of existing railway or highway subgrade construction |
| CN102409598A (en) * | 2011-09-29 | 2012-04-11 | 河海大学 | Method for processing vehicle bump at bridge head of existing highway |
| CN102864712A (en) * | 2012-10-16 | 2013-01-09 | 中铁第四勘察设计院集团有限公司 | Method and structure for micro-disturbance renovating of existing high speed railway subgrade deformation disease |
| CN102926304A (en) * | 2012-11-28 | 2013-02-13 | 中铁第四勘察设计院集团有限公司 | Reinforcement method and reinforcement structure for treating railway soft soil roadbed settlement overweight before operation |
| CN104711915A (en) * | 2015-03-19 | 2015-06-17 | 河海大学 | Reinforcement method for preventing soft soil foundation from emitting slurry during lateral grouting by laying plastic vertically |
-
2015
- 2015-07-03 CN CN201510386505.0A patent/CN104988815A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100768777B1 (en) * | 2006-09-22 | 2007-10-19 | 임규동 | Earth reinforcement method for railway track on the concrete base |
| CN101886382A (en) * | 2010-06-22 | 2010-11-17 | 中铁第四勘察设计院集团有限公司 | Soft foundation reinforcing method of existing railway or highway subgrade construction |
| CN102409598A (en) * | 2011-09-29 | 2012-04-11 | 河海大学 | Method for processing vehicle bump at bridge head of existing highway |
| CN102864712A (en) * | 2012-10-16 | 2013-01-09 | 中铁第四勘察设计院集团有限公司 | Method and structure for micro-disturbance renovating of existing high speed railway subgrade deformation disease |
| CN102926304A (en) * | 2012-11-28 | 2013-02-13 | 中铁第四勘察设计院集团有限公司 | Reinforcement method and reinforcement structure for treating railway soft soil roadbed settlement overweight before operation |
| CN104711915A (en) * | 2015-03-19 | 2015-06-17 | 河海大学 | Reinforcement method for preventing soft soil foundation from emitting slurry during lateral grouting by laying plastic vertically |
Non-Patent Citations (2)
| Title |
|---|
| 平树江: ""垂直铺塑防渗技术在公路工程中的应用"", 《山东交通科技》 * |
| 王安辉: ""已通车高速公路软基沉降病害侧向辐射注浆处治技术"", 《施工技术》 * |
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106049195A (en) * | 2016-05-27 | 2016-10-26 | 中铁三局集团有限公司 | Method for strengthening subgrade basement of existing high speed railway line |
| CN108951307A (en) * | 2018-03-21 | 2018-12-07 | 中国铁道科学研究院铁道建筑研究所 | A kind of regulation method of ballastless track roadbed arch |
| CN108316333A (en) * | 2018-03-28 | 2018-07-24 | 河南理工大学 | A kind of compound raft foundation of resistance to deformation and its construction method suitable for goaf building |
| CN111719345A (en) * | 2019-03-21 | 2020-09-29 | 北京铁科特种工程技术有限公司 | Method for preventing frost damage of existing railway subgrade |
| CN110565452A (en) * | 2019-09-16 | 2019-12-13 | 中铁四院集团岩土工程有限责任公司 | Railway roadbed body steel flower tube grouting reinforcement method and railway roadbed |
| KR20210078897A (en) * | 2019-12-19 | 2021-06-29 | 신명탑건설(주) | Grouting injection reinforcement structure using slope surface of railway track and constructing method thereof |
| KR102414092B1 (en) * | 2019-12-19 | 2022-06-28 | 신명탑건설(주) | Grouting injection reinforcement structure using slope surface of railway track and constructing method thereof |
| CN112228081A (en) * | 2020-10-24 | 2021-01-15 | 中铁一局集团有限公司 | Method for reinforcing pile foundation of shield tunnel side-through high-speed rail viaduct |
| CN113216147A (en) * | 2021-05-11 | 2021-08-06 | 中国科学院武汉岩土力学研究所 | Soft rock roadbed longitudinal crack disease treatment method |
| CN113216147B (en) * | 2021-05-11 | 2023-02-24 | 中国科学院武汉岩土力学研究所 | Soft rock roadbed longitudinal crack disease treatment method |
| CN113417185A (en) * | 2021-05-25 | 2021-09-21 | 山东高速工程建设集团有限公司 | Treatment method for rockfill subgrade void cracking |
| CN113417185B (en) * | 2021-05-25 | 2022-10-14 | 山东高速工程建设集团有限公司 | Treatment method for rockfill subgrade void cracking |
| CN113215892A (en) * | 2021-05-26 | 2021-08-06 | 金陵科技学院 | Grouting soil arch induced pile-supported embankment |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104988815A (en) | Method for treating post-construction settlement disease of railroad bed | |
| CN106759473B (en) | The constructing structure and its construction method of underground pipe gallery and road | |
| CN108560541B (en) | Rotary drilling full-casing follow-up rock face drilling construction method | |
| CN205172598U (en) | Pipe curtain spouts a supporting construction soon | |
| CN102071607B (en) | Railroad bed repair method without affecting existing running conditions | |
| CN109594564A (en) | A kind of anti-collapse construction method of Metro Deep Excavation open cut | |
| CN106567379B (en) | Method for reinforcing manual dewatering, bedding course, low-energy replacement dynamic compaction shallow foundation | |
| CN104846829A (en) | Shield-reserved penetration composite type foundation pit support wall and construction method thereof | |
| CN109371861A (en) | A kind of culvert of reinforced concrete subsiding crack infiltration Treatment Methods and repair structure | |
| CN112832802B (en) | Large-bottom plate supporting structure and method for asymmetric pressure | |
| CN109098175A (en) | A kind of tri-axes deep mixing pile construction method | |
| CN102888795A (en) | Karst roadbed grouting process | |
| CN111519679A (en) | Rapid grooving construction method for micro-weathering rock of diaphragm wall | |
| CN107060800A (en) | A kind of shield-tunneling construction huge stone handling construction method | |
| CN111350104A (en) | Construction method of high-speed railway excavation roadbed in deep artificial spoil area | |
| CN102587385A (en) | Foundation pit supporting method for sludge-exchanged and filled soft soil | |
| CN114059527A (en) | Large-diameter mixing pile construction method suitable for high-groundwater-level hard soil layer | |
| CN110284432B (en) | Construction method for filling bridge abutment in high-fill area after first construction | |
| CN106836182A (en) | A kind of compacted technique of vibroflotation water conservancy diversion | |
| CN103806444A (en) | Soft soil layer rotary excavating pile construction method | |
| CN113174992B (en) | Comprehensive treatment and reinforcement method for collapse of stratum around marine deep-water inclined pile | |
| JP2012117330A (en) | Soil roadbed replacement method | |
| CN109555526A (en) | Grouting strengthening method for underground cavity | |
| CN108824460A (en) | A kind of construction technology of cut subgrade banket | |
| CN114993248A (en) | Ground settlement monitoring method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20151021 |