CN107476149A - A kind of non-excavation type ballastless track mortar leafing seams seam processing method - Google Patents
A kind of non-excavation type ballastless track mortar leafing seams seam processing method Download PDFInfo
- Publication number
- CN107476149A CN107476149A CN201710652642.3A CN201710652642A CN107476149A CN 107476149 A CN107476149 A CN 107476149A CN 201710652642 A CN201710652642 A CN 201710652642A CN 107476149 A CN107476149 A CN 107476149A
- Authority
- CN
- China
- Prior art keywords
- slip casting
- track
- injected hole
- leafing
- processing 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.)
- Granted
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
- E01B31/00—Working rails, sleepers, baseplates, or the like, in or on the line; Machines, tools, or auxiliary devices specially designed therefor
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Railway Tracks (AREA)
- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
Abstract
The invention discloses a kind of non-excavation type ballastless track mortar leafing to seam seam processing method, it confirms edge sealing slip casting region according to the gap slip casting region of screed on track plates confining bed, then injected hole and pressure relief vent are set in edge sealing slip casting region, and injected rubber hose is installed in each injected hole, being sequentially connected each injected hole using grouting equipment completes slip casting so as to form a sealing curtain by screed side.The present invention on track plates confining bed by being provided with injected hole, realize and surface closure is being carried out to the gap between rail layer (bedplate) side end face and screed side end face on the premise of not removing track plates confining bed, significantly reduce construction intensity, construction cost, the stability for maintaining roadbed.
Description
Technical field
The present invention relates to a kind of screed gap joint seal processing method, belong to ballastless track of high-speed railway maintenance technology
Field, and in particular to a kind of non-excavation type ballastless track mortar leafing seams seam processing method.
Background technology
Non-fragment orbit needs to pass through complicated geological environment in laying, in the process of running will be by various extraneous factor bags
The influence of geologic(al) factor, environmental factor and DYNAMIC LOADING OF DRIVING TRAIN ON BRIDGES lotus etc. is included, and produces some diseases.Wherein, track plates or base
The gap formed between plate and middle cement emulsified asphalt mortar layer be the main hurt form of the plate-type non-fragment orbits of CRTS II it
One.At present, conventional gap method for maintaining is that slip casting filling is repaired, using grouting equipment toward injecting low viscosity resin material in gap
Material, gap pore filling is full., will be to track plates side end face and screed side end face before slip casting using this construction method
The hole of intersection carries out closure processing, and when preventing slip casting, slurries occur seepage and cause raw material largely to waste and track
Gap filling is discontented under plate, does not reach maintenance renovating effect.As disclosed in Chinese invention patent specification CN104404844A
A kind of platy ballastless track structure filling bed gap restoring and fastening method in, its elder generation hangs down in filling bed gap area track plate face
Straight drilling, then in track plates face, bore position is anchored, and slip casting reparation is carried out finally for filling bed gap region；But
It is (i.e. track plates side end face and screed when filling bed gap region is connected with the track plates confining bed of track plates both sides
There is also hole for side end face), there can be slurries if directly slip casting reparation is carried out to filling bed gap region and seepage occurs and makes
Largely wasted into raw material and track plates under gap filling it is discontented, so as to not reach maintenance renovating effect；So invention institute
Existing technical problem i.e. the technical problems to be solved by the invention --- how (track plates are being located to gap region
Between lower surface and screed upper surface) slip casting repair before complete (track plates side end face and sand are located to gap region side end face
The space of pulp layer side end face intersection) closure, avoid the excessive of slip casting.
In the prior art, in part way, the intersection of rail layer (bedplate) side end face and screed side end face is located at
It is covered in below confining bed, traditional construction mode is first all to chisel confining bed, to producing rail layer (bedplate) side end face
Closure processing is carried out with the space of screed side end face intersection, is then pointed to track plates lower surface and screed upper surface again
Gap between (bedplate upper surface and screed lower surface) carries out slip casting filling operation, is poured again after the completion of mortar depositing construction
Confining bed.This construction method workload is big, and low construction efficiency, cost is higher, and easily causes roadbed disturbance, destroys original
Road structure.
The content of the invention
In view of the above-mentioned drawbacks of the prior art, present invention aim to solve the deficiency of above-mentioned background technology,
A kind of non-excavation type ballastless track mortar leafing is provided and seams seam processing method, its can on the premise of confining bed is not cut,
Realize and surface closure is carried out to the gap between rail layer side end face and screed side end face.
To be seamed in order to solve the above technical problems, present invention employs such a non-excavation type ballastless track mortar leafing
Processing method, step 1 are longitudinal along track according to the gap location confirmation screed between track plates or bedplate and screed
Gap slip casting region, edge sealing slip casting area is longitudinally cooked up on track plates confining bed along track according to the gap slip casting region
Domain；Step 2, the closing of multiple penetrating orbit plates is drilled with the edge sealing slip casting region interior edge track of track plates confining bed is longitudinally perpendicular
Layer and graded broken stone layer and the injected hole and pressure relief vent connected with bedplate；Step 3, Grouting Pipe is inserted in each injected hole,
Each Grouting Pipe is sequentially connected using grouting equipment and completes slip casting, and slurry is longitudinally set with the cementing formation one of graded broken stone layer along track
The sealing curtain put.
In a kind of preferred embodiment of the present invention, in step 2, the centre position per two neighboring injected hole is arranged
There is a pressure relief vent.
In a kind of preferred embodiment of the present invention, in step 2, level of each injected hole apart from track plates edge
Distance is 50~100mm, and the spacing of two neighboring injected hole is 200~500mm.
In a kind of preferred embodiment of the present invention, in step 3, injecting paste material is two component polyurethane expanded material.
In a kind of preferred embodiment of the present invention, in step 3, grouting equipment is checked before slip casting, ensured
Equipment is working properly, and carries out field test to slurry, checks the foaming effect of slurry, confirms that it meets related request.
In a kind of preferred embodiment of the present invention, in step 3, bottom end closure, side wall are inserted in each injected hole
The Grouting Pipe of grout outlet is provided with, and rotating Grouting Pipe makes the grout outlet in its side wall be arranged along track.(the structure of the Grouting Pipe
It is designed with beneficial to slurry slowly sufficiently in graded broken stone intrastratal flow, so as to fully fill out in the gap in graded broken stone layer completely
Fill)
The beneficial effects of the invention are as follows：The present invention is realized not by being provided with injected hole on track plates confining bed
Table is carried out to the gap between rail layer (bedplate) side end face and screed side end face on the premise of removing track plates confining bed
Face blocks, and significantly reduces construction intensity, construction cost, the stability for maintaining roadbed；The present invention is also by noting simultaneously
Slurry sets relief hole between hole, the situation of injecting paste material expansion damage confining bed caused by effectively avoiding once grouting amount excessive；
Finally, the present invention injects high foaming rate high polymer material, high polymer grouting material using bored grouting method to confining bed lower floor
After being injected under roadbed in grading metalling, flow rapidly, spread in graded broken stone layer, then foaming and intumescing, will
Gap structure filling is full while closely cemented together with graded broken stone under confining bed, one of closely knit curtain is formed, to rail
Plugging action is played on road screed gap surface, by use this construction method, can avoid excavate destroy confining bed and
It is follow-up to pour confining bed construction again, so as to improve efficiency of construction, save construction cost.
Brief description of the drawings
Fig. 1 is that a kind of non-excavation type ballastless track mortar leafing of the present invention seams injected hole and pressure relief vent in processing method
Set location schematic diagram；
Fig. 2 is that a kind of non-excavation type ballastless track mortar leafing of the present invention seams injected hole and pressure relief vent in processing method
Set location schematic diagram；
In figure：1- track plates；2- screeds；3- gaps position；4- bedplates；5- injected holes；6- graded broken stone layers；7- lines
Lu Zhizheng line；8- pressure relief vents；9- track plates confining beds.
Embodiment
In order to make the purpose , technical scheme and advantage of the present invention be clearer, it is right below in conjunction with drawings and Examples
The present invention is further elaborated.It should be appreciated that specific embodiment described herein is only to explain the present invention, not
For limiting the present invention.
This patent is that a kind of non-excavation type ballastless track mortar leafing seams stifled processing method, and concrete construction method is described in detail such as
Under：
(1) edge sealing range of grouting is confirmed：Edge sealing slip casting region, edge sealing slip casting region both ends are confirmed according to gap slip casting region
Respectively exceed gap slip casting 100~200mm of region.
(2) cloth hole：Injected hole is laid on track plates confining bed, horizontal range of the injected hole apart from track plates edge is 50
~100mm, the spacing of injected hole is 200~500mm, sets a pressure relief vent among two injected holes, as depicted in figs. 1 and 2.
(3) drill：Match somebody with somebody diameter 25mm drill bit, vertical drill down injected hole, it is ensured that injected hole bottom using electric hand drill
Base Board position is reached, then dust in hole is cleaned out, sealing of hole is carried out with interim hole packer after the completion of drilling, prevents rainwater
And impurity enters.Match somebody with somebody diameter 10mm drill bit using electric hand drill, bore release in two injected hole centre positions according to the method described above
Hole.
(4) Grouting Pipe is installed：Grouting Pipe is inserted into bottom hole position, ensures on slip casting tube wall injected hole export direction along rail
Road longitudinal direction, then tightens fixation by Grouting Pipe.Grouting Pipe bottom used is enclosed construction, and it is broken to be embedded to grading under confining bed
Injected hole is distributed with slip casting tube wall in rock layers, and injected hole is located at slip casting tube wall both sides.
(5) material installation bug check：Before slip casting, grouting equipment is checked, ensures that equipment is working properly, and to height
Polymer material carries out field test, checks the foaming effect of high polymer expanded material, confirms that it meets related request.
(6) mortar depositing construction：
1) grouting gun head and Grouting Pipe are attached, then carry out 1-3s injection tests, check whether spillage；Confirm without spillage
Afterwards, formal slip casting is started,
Injecting paste material used is two component polyurethane expanded material, and the frothing percentage of expanded material is 2~10 times, initial glutinous
Degree is in below 100mPas, and rise time is in 5~15s, and surface drying time is in 10~30s.
2) grouting gun head is connected with Grouting Pipe, injected one by one into note pipe by slip casting machine, check valve and Grouting Pipe
Double component high polymer material, acting through on slip casting tube wall slip casting aperture using high pressure, that high polymer grouting material is spurted into grading is broken
In rock layers, then high polymer grouting material spreads rapidly in graded broken stone layer, and fast reaction expands, and graded broken stone is cementing
Together, gap structure filling under confining bed is full, direction along ng a path forms curtain wall, plays surface plugging action.
Surplus injecting paste material can be emerged by pressure relief vent during slip casting, can effectively avoid once grouting amount excessive, be occurred
The situation of injecting paste material expansion damage confining bed.Suitably increase and decrease the slip casting duration by observing relief hole grout situation, control
Principle is as follows：
It is appropriate to shorten 1~3s of the single hole slip casting duration when there is obvious grout；When not occurring grout, proper extension list
Hole slip casting 1~3s of duration, ensure there is a small amount of grout material to emerge in relief hole.
Slip casting process control grouting pressure is in 5~10MPa, and each injected hole slip casting duration is 10~20s, grouting amount
Control is in 200~2000g.
After slip casting is completed, you can carry out gap grouting remediation construction in respective carter opposite side.
3) after single hole slip casting is completed, according to aforesaid operations, mortar depositing construction is carried out to remaining injected hole successively.
The present invention injects high foaming rate high polymer material, high polymer grouting material using bored grouting method to confining bed lower floor
Material flows rapidly in graded broken stone layer, spread, then foaming and intumescing after being injected under roadbed in grading metalling,
Gap structure filling under confining bed is full while closely cemented together with graded broken stone, one of closely knit curtain is formed, it is right
Track mortar leafing seam surface plays plugging action, by use this construction method, can avoid excavate destroy confining bed with
And the follow-up confining bed that pours again is constructed, and so as to improve efficiency of construction, saves construction cost.In addition, the curtain tool that slip casting is formed
There is good waterproof effect, track can be played a protective role.
After completing above-mentioned operation, you can according to a kind of plate-type ballastless track knot as disclosed in patent CN104404844A
Structure packed layer gap restorative procedure or other gap restorative procedures carry out slip casting reparation to the gap between track plates and screed,
The excessive of slurry is repaired in gap repair process so as to efficiently avoid.
The specific embodiment of the present invention is as follows：(1) edge sealing range of grouting, edge sealing note are confirmed according to gap range of grouting
Slurry region both ends respectively exceed slip casting region 150mm.(2) in the edge sealing range of grouting of confirmation, lateral separation track plates edge
Horizontal range is 60mm, and longitudinal direction along ng a path spacing is 300mm, sets injected hole, sets and lets out in two injected hole centre positions
Press hole.(3) match somebody with somebody diameter 25mm drill bit using electric hand drill, bore injected hole downward vertically, when injected hole bottom reaches bedplate
When untill, dust in hole is cleaned out, hole for injecting glue is blocked with interim sealing of hole plug after the completion of drilling, prevents sewage and impurity
Into.Match somebody with somebody diameter 10mm drill bit using electric hand drill, bore pressure relief vent in two injected hole centre positions according to the method described above.(4)
Grouting Pipe is inserted into bottom hole position, ensures that injected hole export direction is along track longitudinal direction on slip casting tube wall, then by slip casting
Pipe tightens fixation.(5) before slip casting, start shooting trial operation, check equipment whether normal operation；To empty slip casting, injecting paste material hair is checked
Whether bubble effect meets to require.The material that slip casting uses is two component polyurethane expanded material, and the initial viscosity of expanded material is
60mPas, frothing percentage are 6 times, and rise time is in 10s, and surface drying time is in 20s.(6) grouting gun head and Grouting Pipe are connected
Connect, then carry out 2s injection tests, check whether spillage；After confirming without spillage, start formal slip casting, slip casting pressure is controlled during slip casting
Power is 8MPa, and the single hole grouting amount duration is 15s, grouting amount 800g.There is a small amount of note after the completion of single hole slip casting, in relief hole
Pulp material is emerged.
Grouting gun head is disassembled from pipeline rapidly after the completion of slip casting, then grouting gun head cleaned, single hole
After the completion of slip casting, mortar depositing construction is carried out to remaining injected hole successively along track longitudinal direction according to aforesaid operations.Slip casting completes it
Afterwards, you can carry out gap grouting remediation construction in track opposite side.
After completing above-mentioned operation, next slip casting reparation can be carried out to the gap between track plates and screed.
Claims (6)
1. a kind of non-excavation type ballastless track mortar leafing seams seam processing method, it is characterised in that：This method includes,
Step 1, according to gap of the gap location confirmation screed between track plates or bedplate and screed along track longitudinal direction
Slip casting region, edge sealing slip casting region is longitudinally cooked up on track plates confining bed along track according to the gap slip casting region；
Step 2, the closing of multiple penetrating orbit plates is drilled with the edge sealing slip casting region interior edge track of track plates confining bed is longitudinally perpendicular
Layer and graded broken stone layer and the injected hole and pressure relief vent connected with bedplate；
Step 3, Grouting Pipe is inserted in each injected hole, being sequentially connected each Grouting Pipe using grouting equipment completes slip casting, slurry
Material with graded broken stone layer is cementing forms one along the longitudinally disposed sealing curtain of track.
2. a kind of non-excavation type ballastless track mortar leafing according to claim 1 seams seam processing method, its feature exists
In：In step 2, the centre position per two neighboring injected hole is disposed with a pressure relief vent.
3. a kind of non-excavation type ballastless track mortar leafing according to claim 1 or 2 seams seam processing method, its feature
It is：In step 2, horizontal range of each injected hole apart from track plates edge is 50~100mm, two neighboring injected hole
Spacing is 200~500mm.
4. a kind of non-excavation type ballastless track mortar leafing according to claim 1 seams seam processing method, its feature exists
In：In step 3, injecting paste material is two component polyurethane expanded material.
5. a kind of non-excavation type ballastless track mortar leafing according to claim 1 seams seam processing method, its feature exists
In：In step 3, grouting equipment is checked before slip casting, ensures that equipment is working properly, and field test, inspection are carried out to slurry
The foaming effect of slurry is looked into, confirms that it meets related request.
6. a kind of non-excavation type ballastless track mortar leafing according to claim 1 seams seam processing method, its feature exists
In：In step 3, insertion bottom end closure, side wall are provided with the Grouting Pipe of grout outlet, and rotary glue injection pipe in each injected hole
The grout outlet in its side wall is set to be arranged along track.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710652642.3A CN107476149B (en) | 2017-08-02 | 2017-08-02 | A kind of non-excavation type ballastless track mortar leafing seams seam processing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710652642.3A CN107476149B (en) | 2017-08-02 | 2017-08-02 | A kind of non-excavation type ballastless track mortar leafing seams seam processing method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107476149A true CN107476149A (en) | 2017-12-15 |
| CN107476149B CN107476149B (en) | 2019-06-04 |
Family
ID=60597004
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710652642.3A Active CN107476149B (en) | 2017-08-02 | 2017-08-02 | A kind of non-excavation type ballastless track mortar leafing seams seam processing method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107476149B (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108130833A (en) * | 2017-12-22 | 2018-06-08 | 中铁四院集团岩土工程有限责任公司 | The method for correcting error of sedimentation offset non-fragment orbit |
| CN109736152A (en) * | 2019-01-31 | 2019-05-10 | 固远晨通科技发展有限公司 | Without how off-seam repairs structure and method for repairing and mending between railway sleeper and road bed board |
| CN109778619A (en) * | 2019-01-25 | 2019-05-21 | 北京瑞威世纪铁道工程有限公司 | Empty construction method is hung between processing concrete bottom seat board and bedding graded broken stone surface layer |
| CN109778618A (en) * | 2019-01-25 | 2019-05-21 | 北京瑞威世纪铁道工程有限公司 | Using the construction method at chemical pulp processing concrete bottom seat board expansion joint |
| CN110670418A (en) * | 2019-09-26 | 2020-01-10 | 中铁四院集团岩土工程有限责任公司 | Ballastless track roadbed surface layer slurry turning and finishing method |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3656690A (en) * | 1969-03-22 | 1972-04-18 | Ilseder Huette | Railbed |
| DE4104683A1 (en) * | 1991-02-15 | 1992-08-20 | Wayss & Freytag Ag | Rail road bed - uses liq. mortar to form a plate in upper section of the ballast, with structured ballast particles to prevent downwards dispersion |
| CN103952952A (en) * | 2014-05-13 | 2014-07-30 | 中铁二十四局集团安徽工程有限公司 | Method for repairing open joint of track slab of CRTS II type slab ballastless track on high-speed rail |
| CN104404844A (en) * | 2014-11-18 | 2015-03-11 | 中国铁道科学研究院铁道建筑研究所 | Method for repairing and reinforcing open joint of filling layer of slab ballastless track |
| CN105484110A (en) * | 2015-11-24 | 2016-04-13 | 北京瑞威铁科高铁工程有限公司 | Renovating method for gaps and mud spillover between CRTSI template type ballastless track base plate and surface layer of roadbed of high-speed railway |
-
2017
- 2017-08-02 CN CN201710652642.3A patent/CN107476149B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3656690A (en) * | 1969-03-22 | 1972-04-18 | Ilseder Huette | Railbed |
| DE4104683A1 (en) * | 1991-02-15 | 1992-08-20 | Wayss & Freytag Ag | Rail road bed - uses liq. mortar to form a plate in upper section of the ballast, with structured ballast particles to prevent downwards dispersion |
| CN103952952A (en) * | 2014-05-13 | 2014-07-30 | 中铁二十四局集团安徽工程有限公司 | Method for repairing open joint of track slab of CRTS II type slab ballastless track on high-speed rail |
| CN104404844A (en) * | 2014-11-18 | 2015-03-11 | 中国铁道科学研究院铁道建筑研究所 | Method for repairing and reinforcing open joint of filling layer of slab ballastless track |
| CN105484110A (en) * | 2015-11-24 | 2016-04-13 | 北京瑞威铁科高铁工程有限公司 | Renovating method for gaps and mud spillover between CRTSI template type ballastless track base plate and surface layer of roadbed of high-speed railway |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108130833A (en) * | 2017-12-22 | 2018-06-08 | 中铁四院集团岩土工程有限责任公司 | The method for correcting error of sedimentation offset non-fragment orbit |
| CN108130833B (en) * | 2017-12-22 | 2020-02-07 | 中铁四院集团岩土工程有限责任公司 | Deviation rectifying method for settlement and deviation ballastless track |
| CN109778619A (en) * | 2019-01-25 | 2019-05-21 | 北京瑞威世纪铁道工程有限公司 | Empty construction method is hung between processing concrete bottom seat board and bedding graded broken stone surface layer |
| CN109778618A (en) * | 2019-01-25 | 2019-05-21 | 北京瑞威世纪铁道工程有限公司 | Using the construction method at chemical pulp processing concrete bottom seat board expansion joint |
| CN109736152A (en) * | 2019-01-31 | 2019-05-10 | 固远晨通科技发展有限公司 | Without how off-seam repairs structure and method for repairing and mending between railway sleeper and road bed board |
| CN109736152B (en) * | 2019-01-31 | 2024-02-13 | 固远晨通科技发展有限公司 | Gap repairing structure and repairing method between ballastless track sleeper and track slab |
| CN110670418A (en) * | 2019-09-26 | 2020-01-10 | 中铁四院集团岩土工程有限责任公司 | Ballastless track roadbed surface layer slurry turning and finishing method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107476149B (en) | 2019-06-04 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107476149B (en) | A kind of non-excavation type ballastless track mortar leafing seams seam processing method | |
| CN106013259B (en) | Shake the underground engineering concrete structure deformation joint blocking method under bumpy weather | |
| CN103410063B (en) | A kind of slip-casting lifting fast repairing method for sedimentation non-fragment orbit | |
| CN106012697B (en) | Ballastless track roadbed high polymer grouting lifting method | |
| CN105484110B (en) | Method for treating slurry leakage of gap between base plate of CRTSI type plate ballastless track of high-speed railway and surface layer of roadbed | |
| CN104480844A (en) | Method for repairing crack of asphalt concrete pavement | |
| CN107387123A (en) | The construction method of pressure grouting leak stopping is carried out for shield duct piece piece Seepage | |
| JP7257086B2 (en) | Comprehensive Construction Method for Low Overburden Sections of Tunnels | |
| CN111287759B (en) | Shallow-buried close-connection underground excavation tunnel construction method | |
| CN106381840A (en) | Leaking stoppage grouting method for cracks under high pressure flowing water state | |
| CN104988815A (en) | Method for treating post-construction settlement disease of railroad bed | |
| CN104060590B (en) | The reinforcement leakage preventing structure of a kind of pressure diversion tunnel and construction method thereof | |
| CN104533468B (en) | A kind of subway tunnel the wall of a borehole post-grouting method | |
| CN108385456A (en) | A kind of board-like ballastless track bed board integral replacing method of cast-in-place railway roadbed | |
| CN106593489A (en) | Difficult mining coal seam bottom plate thin layer limestone high-pressure strong aquifer karst fissure aggregate perfusion method | |
| CN111075455A (en) | Freezing method channel construction process | |
| CN214741219U (en) | Disposable hole sealing structure | |
| CN112900181B (en) | Construction method for widening thin layer of asphalt pavement | |
| CN108221715A (en) | A kind of renovation technique of bridge pavement | |
| CN103993609A (en) | Silicon lime sand water guiding, draining and filtering multifunctional rapid and rigid congealing body manual repaired foundation pit water-stopping curtain | |
| CN111927494B (en) | Subway tunnel ballast bed and drainage ditch structure reinforcing method | |
| CN203741855U (en) | Foundation pit waterproof curtain capable of being repaired manually and with multifunctional coagulation body with quickly hardening silica fume layer and integrating water guiding, discharging and filtering functions | |
| CN112030690A (en) | Construction method for treating pavement cracks | |
| CN112982372A (en) | Inner drilling pipe insertion pipe compaction grouting reinforcement method based on pipe gallery bottom plate cavity | |
| CN112176781A (en) | Method for controlling subgrade settlement of high-speed rail operation |
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 | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20180328 Address after: 430063 Wuchang, Hubei, Yang Park, Peace Avenue, No. 745 Applicant after: In the fourth group of geotechnical engineering limited liability company Address before: 430063 Wuchang, Hubei, Yang Park, Peace Avenue, No. 745 Applicant before: The forth Survey and Design Institute (Group) Co., Ltd. Of CRCC Applicant before: In the fourth group of geotechnical engineering limited liability company |
|
| TA01 | Transfer of patent application right | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 430063 No. 745 Heping Avenue, Wuchang, Hubei, Wuhan Patentee after: China Railway Siyuan Group Engineering Construction Co., Ltd Address before: 430063 No. 745 Heping Avenue, Wuchang, Hubei, Wuhan Patentee before: GEOTECHNICAL ENGINEERING CO., LTD. OF CHINA RAILWAY SIYUAN SURVEY AND DESIGN GROUP Co.,Ltd. |
|
| CP01 | Change in the name or title of a patent holder |