CN110144906A - A kind of mechanical slotting method in railway slope protection construction - Google Patents

A kind of mechanical slotting method in railway slope protection construction Download PDF

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Publication number
CN110144906A
CN110144906A CN201910481090.3A CN201910481090A CN110144906A CN 110144906 A CN110144906 A CN 110144906A CN 201910481090 A CN201910481090 A CN 201910481090A CN 110144906 A CN110144906 A CN 110144906A
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CN
China
Prior art keywords
slope
foundation trench
skeleton
railway
slope protection
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
Application number
CN201910481090.3A
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Chinese (zh)
Inventor
安延伟
王永彬
张金鸽
张久鑫
程佳兴
张广乐
郭大林
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Second Engineering Co Ltd of China Railway No 3 Engineering Group Co Ltd
Original Assignee
Second Engineering Co Ltd of China Railway No 3 Engineering Group Co Ltd
Priority date (The priority date 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 date listed.)
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Publication date
Application filed by Second Engineering Co Ltd of China Railway No 3 Engineering Group Co Ltd filed Critical Second Engineering Co Ltd of China Railway No 3 Engineering Group Co Ltd
Priority to CN201910481090.3A priority Critical patent/CN110144906A/en
Publication of CN110144906A publication Critical patent/CN110144906A/en
Pending legal-status Critical Current

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Classifications

    • EFIXED CONSTRUCTIONS
    • E02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02DFOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D17/00Excavations; Bordering of excavations; Making embankments
    • E02D17/06Foundation trenches ditches or narrow shafts
    • EFIXED CONSTRUCTIONS
    • E02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02DFOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D17/00Excavations; Bordering of excavations; Making embankments
    • E02D17/20Securing of slopes or inclines
    • EFIXED CONSTRUCTIONS
    • E02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02DFOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D2250/00Production methods
    • E02D2250/0023Cast, i.e. in situ or in a mold or other formwork

Abstract

The invention discloses a kind of mechanical slotting method in railway slope protection construction, S1: slope surface finishing is carried out;The bench crest, the leg wire of slope of side slope and the position of platform line of side slope of the side slope of roadbed side are measured by total station;S2: hanging wire setting-out is carried out;The beginning and end side line of skeleton and the lacing thread of bottom and top are released in side slope, and side line and lacing thread are marked;S3: foundation trench excavates;The foundation trench of placement skeleton is dug out by milling digging machine tool;S4: foundation trench finishing;Foundation trench is tamped by ballast consolidating machine;S5: foundation trench is checked and accepted;It carries out an acceptance inspection according to foundation trench acceptance criteria;S6: skeleton installation;S7: installation tapping pipe;S8: casting concrete;S9: step is checked and accepted in setting;S10: expansion joint setting.The present invention uses completely new foundation trench forming method, reduces difficulty of construction, improves whole construction efficiency, while optimizing the overall structure of railway slope protection, improve the structural strength of slope protection.

Description

A kind of mechanical slotting method in railway slope protection construction
Technical field
The present invention relates to construction of railways technical fields, and in particular to a kind of mechanical slotting side in railway slope protection construction Method.
Background technique
Railway is the track circuit for the dedicated traveling of the vehicles such as train, with the development of national economy, the iron in China Road cause is also quickly grown nearly ten years, and railway operation total kilometrage is more than 100,000 kilometers.Currently, railway and infrastructure are states The major fields of family's investment, in the process of construction of railway, a good protective slope structure is guarantee train safe operation one A key factor.
And one of link is to dig out foundation trench on slope protection using digging machine during slope protection construction, construction method is at present Directly excavate soil along lime line using digging machine, but due to arch skeleton be it is curved, corresponding lime line be also into it is curved, And the bucket of common digging machine can not be bonded curved lime line completely and accurately dig out foundation trench, this form of construction work for digging foundation trench is not Only time-consuming, difficulty is big, low efficiency, and the foundation trench dug out is irregular, and the soil at foundation trench edge is easy to loosen, so that entire base The quality of slot is very low.
Summary of the invention
For the defects in the prior art, the present invention provides a kind of mechanical slotting method in railway slope protection construction, To use completely new foundation trench forming method, drill bit being dug using milling and is constructed, foundation trench molding is fast, and difficulty is small, substantially increases foundation trench and applies The efficiency of work improves the structural strength of slope protection, reduces a possibility that accidents such as landslide, avalanche, deformation occur, and improves safety system Number.
The present invention provides a kind of mechanical slotting method in railway slope protection construction, S1: slope surface finishing is carried out;Pass through Total station measures the position of platform line of the bench crest of the side slope of roadbed side, the leg wire of slope of side slope and side slope;
S2: hanging wire setting-out is carried out;The beginning and end side line of skeleton and the fringing of bottom and top are released in side slope Line, and side line and lacing thread are marked;
S3: foundation trench excavates;The foundation trench of placement skeleton is dug out by milling digging machine tool;
S4: foundation trench finishing;Foundation trench is tamped by ballast consolidating machine;
S5: foundation trench is checked and accepted;It carries out an acceptance inspection according to foundation trench acceptance criteria;
S6: skeleton installation;Skeleton is mounted in foundation trench, and passes through double faced adhesive tape paper stuff up a crack;
S7: installation tapping pipe;The more tapping pipes tilted down are installed in side slope;
S8: casting concrete;Coagulation is poured between the main framing and arch skeleton, and arch skeleton and arch skeleton of skeleton Soil, and poured from slope foot to top of the slope;
S9: step is checked and accepted in setting;In arch skeleton and encircle the examination step for being arranged between skeleton and extending from slope foot to top of the slope;
S10: expansion joint setting;After equal concrete final set, it is arranged along roadbed direction and a plurality of extends from slope foot to top of the slope Expansion joint.
Preferably, S11: side slope progress is smooth, clean surface dust with water and fills up the recessed artificial treatment in hole, and is tamped with ballast consolidating machine Slope surface.The soil layer of side slope is reinforced, and being largely lost for Soil Slope is avoided.
Preferably, S21: the side line and lacing thread of main framing are released, and releases the side line and lacing thread of arch skeleton. Main framing is rectangle, and multiple arch skeletons are installed inside each main framing, and the material of main framing and arch skeleton selects alloy Steel greatly improves the overall structural strength of slope protection.
Preferably, all side line and lacing thread S22: are indicated using lime.Avoid to basis excavation occur compared with Big error influences the installation of skeleton.
Preferably, S31: milling digging machine tool carries out foundation trench excavation using digging drill bit is milled, and cooperates artificial progress foundation trench excavation;
S311: milling digging machine tool is drilled out by milling digging drill bit along the side line and lacing thread that denote lime multiple adjacent The datum hole of designated depth;
S312: each adjacent two datum hole is not overlapped or partly overlaps;
S313: all datum holes are successively connected to the profile to form foundation trench by milling digging drill bit again;
S314: drill bit is dug finally by milling and excavates the formation foundation trench of the soil within profile.
Construction for foundation trench is currently directly to excavate soil along lime line using digging machine, but since arch skeleton is curved Bent, then lime line is also into curved, and the bucket of common digging machine can not be bonded curved lime line completely and accurately dig out Foundation trench, not only time-consuming for this form of construction work for digging foundation trench, difficulty is big, low efficiency, but also the foundation trench dug out is irregular, foundation trench side The soil of edge is easy to loosen, so that the quality of entire foundation trench is very low.And milling digging machine tool adapted milling is selected to dig drill bit, using first beating Datum hole is connected to the profile to form foundation trench by datum hole again, finally excavates the construction method that the soil within profile forms foundation trench, foundation trench Molding is fast, and difficulty is small, substantially increases the efficiency of construction of foundation ditch.Meanwhile foundation trench side slope soil disturbance is dug out by this method It is small, size is accurate for fluting, line style is smooth.Cooperate artificial progress foundation trench excavation again, avoids the occurrence of the case where backbreaking.
Preferably, ballast consolidating machine tamps foundation trench using tamper.Ballast consolidating machine adapted tamper, guarantee foundation trench with Skeleton adaptation, improves installation accuracy.Meanwhile effectivelying prevent side slope differential settlement, it is ensured that roadbed overall stability.
Preferably, expansion joint S101: is set at 15-20m or stratum significant change along roadbed direction.
Preferably, the width at expansion joint is 2.5-3.5cm, and depth is not less than 0.2m;Expansion joint internal plug fills out pitch and fried dough twist Reinforcing bar.
Preferably, S81: after waiting concrete final set, the soil encircleed on the inside of skeleton is tamped, then uses six rib block bases The inside of arch skeleton is filled up at bottom.
Preferably, " "-" type " positioning tool is installed in the inside of arch skeleton, for fixing six rib block substrates." "-" type " Positioning tool makes six rib block substrates that installation be accurately positioned, and ensure that the stability of six rib block substrates.
The beneficial effects of the present invention are embodied in:
1. being tamped by ballast consolidating machine to slope surface and foundation trench, the stability of roadbed soil layer is greatly improved, side slope is avoided Penetrated by rainwash and rainwater occur being largely lost of Soil Slope, come down, avalanche situations such as.
2. digging out foundation trench using milling digging machine tool, side slope soil disturbance is small, fluting size is accurate, is conducive to improve later period bone The accuracy of frame installation, the fixation of skeleton are more stable.
3. sealing the side of skeleton using double faced adhesive tape paper, concrete is avoided to leak out the whole matter of influence construction from foundation trench Amount, it is ensured that seam not spillage.Sealing improves the closure of skeleton simultaneously, also prevents surface water and easily penetrate into slope surface soil layer making side The case where slope soil expansion deforms.
4. carrying out check of foundation subsoil by technical staff after the completion of foundation trench excavation, self-test qualification report on-site supervision engineer checks and accepts visa. Artificial check of foundation subsoil step is added, the supervision to construction quality is improved, is conducive to improve total quality.
Detailed description of the invention
It, below will be to specific in order to illustrate more clearly of the specific embodiment of the invention or technical solution in the prior art Embodiment or attached drawing needed to be used in the description of the prior art are briefly described.In all the appended drawings, similar element Or part is generally identified by similar appended drawing reference.In attached drawing, each element or part might not be drawn according to actual ratio.
Fig. 1 is the structural schematic diagram of the present embodiment;
Fig. 2 is that the present embodiment hogging skeleton installs the structural schematic diagram after " "-" type " positioning tool and six rib block substrates;
Fig. 3 is the structural schematic diagram of " "-" type " positioning tool in the present embodiment;
Fig. 4 is the bottom view of Fig. 3;
Fig. 5 is the construction schematic diagram of foundation trench in the present embodiment.
In attached drawing, 1- bench crest, 2- leg wire of slope, 3- main framing, 4- arch skeleton, 5- foundation trench, six rib block substrate of 6-, 7- " one Drill bit is dug in font " positioning tool, 8- baffle, 9- datum hole, 10- lime, 11- milling.
Specific embodiment
It is described in detail below in conjunction with embodiment of the attached drawing to technical solution of the present invention.Following embodiment is only used for Clearly illustrate technical solution of the present invention, therefore be only used as example, and cannot be used as a limitation and limit protection model of the invention It encloses.
It should be noted that unless otherwise indicated, technical term or scientific term used in this application should be this hair The ordinary meaning that bright one of ordinary skill in the art are understood.
A kind of mechanical slotting method in railway slope protection construction is present embodiments provided, specifically includes the following steps:
As shown in Figure 1, S1: carrying out slope surface finishing;Bench crest 1, the side slope of the side slope of roadbed side are measured by total station Leg wire of slope 2 and side slope position of platform line.S11: side slope progress is smooth, clean surface dust with water and fills up the recessed artificial treatment in hole, and Slope surface is tamped with ballast consolidating machine.The soil layer of side slope is reinforced, and being largely lost for Soil Slope is avoided.
S2: hanging wire setting-out is carried out;The beginning and end side line of skeleton and the fringing of bottom and top are released in side slope Line, and side line and lacing thread are marked.Skeleton includes main framing 3 and arch skeleton 4, S21: releasing the side of main framing 3 Sideline and lacing thread, and release the side line and lacing thread of arch skeleton 4.Main framing 3 is rectangle, is pacified inside each main framing 3 Multiple arch skeletons 4 are filled, and the material of main framing 3 and arch skeleton 4 selects steel alloy, the overall structure for greatly improving slope protection is strong Degree.S22: all side line and lacing thread are indicated using lime.It avoids biggish error occur to the excavation on basis, influences The installation of skeleton.
S3: foundation trench 5 excavates;The foundation trench 5 of placement skeleton is dug out by milling digging machine tool.S31: milling digging machine tool digs drill bit using milling 11, which carry out foundation trench 5, excavates, and the artificial foundation trench 5 that carries out is cooperated to excavate.
As shown in figure 5, S311: milling digging machine tool digs drill bit 11 along the side line and edge for denoting lime 10 by milling Sideline drills out the datum hole 9 of multiple adjacent designated depths;
S312: each adjacent two datum hole 9 is not overlapped or partly overlaps;
S313: the profile that the connection of all datum holes 9 is successively formed foundation trench by drill bit 11 is dug by milling again;
S314: drill bit 11 is dug finally by milling and excavates the formation foundation trench of the soil within profile.
Construction for foundation trench is currently directly to excavate soil along lime line using digging machine, but since arch skeleton is curved Bent, then lime line is also into curved, and the bucket of common digging machine can not be bonded curved lime line completely and accurately dig out Foundation trench, not only time-consuming for this form of construction work for digging foundation trench, difficulty is big, low efficiency, but also the foundation trench dug out is irregular, foundation trench side The soil of edge is easy to loosen, so that the quality of entire foundation trench is very low.And milling digging machine tool adapted milling is selected to dig drill bit, using first edge Denote the side line of lime 10 and lacing thread and beat datum hole 9 datum hole 9 is connected to the profile to form foundation trench again, finally excavate profile Within soil form the construction method of foundation trench, foundation trench molding is fast, and difficulty is small, substantially increases the efficiency of construction of foundation ditch.Meanwhile Dig out that foundation trench side slope soil disturbance is small, size is accurate for fluting, line style is smooth by this method.The artificial foundation trench that carries out is cooperated to open again It digs, avoids the occurrence of the case where backbreaking.
S4: foundation trench 5 is modified;Foundation trench 5 is tamped by ballast consolidating machine.Ballast consolidating machine using tamper to foundation trench 5 into Row compacting.Ballast consolidating machine adapted tamper guarantees that foundation trench 5 is adapted to skeleton, improves installation accuracy.Meanwhile effectivelying prevent side slope Differential settlement, it is ensured that roadbed overall stability greatly improves the stability of roadbed soil layer, avoids side slope by rainwash Infiltration with rainwater occur being largely lost of Soil Slope, come down, avalanche situations such as.
S5: foundation trench 5 is checked and accepted;It carries out an acceptance inspection according to 5 acceptance criteria of foundation trench;Foundation trench 5 is carried out after the completion of excavating by technical staff Check of foundation subsoil, self-test qualification report on-site supervision engineer check and accept visa.Artificial check of foundation subsoil step is added, the supervision to construction quality is improved, Be conducive to improve total quality.
S6: skeleton installation;Skeleton is mounted in foundation trench 5, and passes through double faced adhesive tape paper stuff up a crack.Using double faced adhesive tape paper The side of skeleton is sealed, avoids concrete from leaking out influence from foundation trench 5 and constructs total quality, it is ensured that seam not spillage.Simultaneously Sealing improves the closure of skeleton, also prevents surface water and easily penetrates into the case where slope surface soil layer deforms side slope soil expansion.
S7: installation tapping pipe;The more tapping pipes tilted down are installed in side slope.Tapping pipe uses pvc pipe, tapping pipe One end insertion side slope soil in, other end tilts down, by soil water be discharged.
S8: casting concrete;It is poured between the main framing 3 and arch skeleton 4, and arch skeleton 4 and arch skeleton 4 of skeleton Concrete, and poured from slope foot to top of the slope.S81: after waiting concrete final set, the soil for encircleing 4 inside of skeleton is tamped, so The inside of arch skeleton 4 is filled up using six rib block substrates 6 afterwards.
S9: step is checked and accepted in setting;In arch skeleton 4 and encircle the examination step for being arranged between skeleton 4 and extending from slope foot to top of the slope. According to the qualified examination step of design requirement setting.
S10: expansion joint setting;After equal concrete final set, it is arranged along roadbed direction and a plurality of extends from slope foot to top of the slope Expansion joint.S101: expansion joint is set at 15-20m or stratum significant change along roadbed direction.The specific ruler at expansion joint Very little as follows: the width at expansion joint is 2.5-3.5cm, and depth is not less than 0.2m;Expansion joint internal plug fills out pitch and fried dough twist reinforcing bar.
In addition, as shown in Figures 2 to 4, " "-" type " positioning tool 7 is installed in the inside of arch skeleton 4, for fixing six ribs Block substrate 6." "-" type " positioning tool 7 makes six rib block substrates 6 that installation be accurately positioned, and ensure that the stability of six rib block substrates 6. The both ends of " "-" type " positioning tool 7 are fixedly connected with the vertical both sides of arch skeleton 4, and the centre of " "-" type " positioning tool is equipped with The baffle 8 being adapted to six rib block substrates 6.Baffle 8 be equipped with it is multiple, multiple baffles 8 respectively be located at same level height six ribs Block substrate 6 corresponds, and each six ribs block substrate 6 is blocked, prevents six rib block substrates 6 from moving.
Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention., rather than its limitations;To the greatest extent Pipe present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that: its according to So be possible to modify the technical solutions described in the foregoing embodiments, or to some or all of the technical features into Row equivalent replacement;And these are modified or replaceed, various embodiments of the present invention technology that it does not separate the essence of the corresponding technical solution The range of scheme should all cover within the scope of the claims and the description of the invention.

Claims (10)

1. S1: a kind of mechanical slotting method in railway slope protection construction carries out slope surface finishing;Roadbed is measured by total station The position of platform line of the bench crest of the side slope of side, the leg wire of slope of side slope and side slope;It is characterized by:
S2: hanging wire setting-out is carried out;The beginning and end side line of skeleton and the lacing thread of bottom and top are released in side slope, And side line and lacing thread are marked;
S3: foundation trench excavates;The foundation trench of placement skeleton is dug out by milling digging machine tool;
S4: foundation trench finishing;Foundation trench is tamped by ballast consolidating machine;
S5: foundation trench is checked and accepted;It carries out an acceptance inspection according to foundation trench acceptance criteria;
S6: skeleton installation;Skeleton is mounted in foundation trench, and passes through double faced adhesive tape paper stuff up a crack;
S7: installation tapping pipe;The more tapping pipes tilted down are installed in side slope;
S8: casting concrete;The equal casting concrete between the main framing and arch skeleton, and arch skeleton and arch skeleton of skeleton, And it is poured from slope foot to top of the slope;
S9: step is checked and accepted in setting;In arch skeleton and encircle the examination step for being arranged between skeleton and extending from slope foot to top of the slope;
S10: expansion joint setting;After equal concrete final set, along roadbed direction be arranged it is a plurality of extends from slope foot to top of the slope stretch Seam.
2. a kind of mechanical slotting method in railway slope protection construction according to claim 1, it is characterised in that: S11: Side slope progress is smooth, clean surface dust with water and fills up the recessed artificial treatment in hole, and tamps slope surface with ballast consolidating machine.
3. a kind of mechanical slotting method in railway slope protection construction according to claim 1, it is characterised in that: S21: The side line and lacing thread of main framing are released, and releases the side line and lacing thread of arch skeleton.
4. a kind of mechanical slotting method in railway slope protection construction according to claim 3, it is characterised in that: S22: All side line and lacing thread are indicated using lime.
5. a kind of mechanical slotting method in railway slope protection construction according to claim 4, it is characterised in that: S31: It mills digging machine tool and carries out foundation trench excavation using digging drill bit is milled, and cooperate artificial progress foundation trench excavation;
S311: milling digging machine tool digs drill bit by milling and drills out multiple adjacent specify along the side line and lacing thread that denote lime The datum hole of depth;
S312: each adjacent two datum hole is not overlapped or partly overlaps;
S313: all datum holes are successively connected to the profile to form foundation trench by milling digging drill bit again;
S314: drill bit is dug finally by milling and excavates the formation foundation trench of the soil within profile.
6. a kind of mechanical slotting method in railway slope protection construction according to claim 1 or 2, feature exist In: ballast consolidating machine tamps foundation trench using tamper.
7. a kind of mechanical slotting method in railway slope protection construction according to claim 1, it is characterised in that: S101: expansion joint is set at 15-20m or stratum significant change along roadbed direction.
8. a kind of mechanical slotting method in railway slope protection construction according to claim 7, it is characterised in that: flexible The width of seam is 2.5-3.5cm, and depth is not less than 0.2m;Expansion joint internal plug fills out pitch and fried dough twist reinforcing bar.
9. a kind of mechanical slotting method in railway slope protection construction according to claim 1, it is characterised in that: S81: After equal concrete final set, the soil encircleed on the inside of skeleton is tamped, the inside of arch skeleton is then filled up using six rib block substrates.
10. a kind of mechanical slotting method in railway slope protection construction according to claim 9, it is characterised in that: " "-" type " positioning tool is installed in the inside for encircleing skeleton, for fixing six rib block substrates.
CN201910481090.3A 2019-06-04 2019-06-04 A kind of mechanical slotting method in railway slope protection construction Pending CN110144906A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115012430A (en) * 2021-12-27 2022-09-06 德州市公路工程总公司 Prestressed anchor cable frame type protective structure and construction method thereof

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH086328B2 (en) * 1990-03-07 1996-01-24 ランデス株式会社 Slope conservation block
CN102392650A (en) * 2011-11-02 2012-03-28 中铁隧道集团有限公司 Non-explosive tunnel excavation construction method
CN105421470A (en) * 2015-11-18 2016-03-23 江西双德建筑工程有限公司 Construction method for assembled type anchor rod and arch framework combined type ecological slope protection
CN105649093A (en) * 2016-04-05 2016-06-08 山东净金新能源有限公司 Arch fixing rack for highway/railway tunnel and manufacturing method of arch fixing rack
CN108442390A (en) * 2018-03-26 2018-08-24 中铁三局集团有限公司 A kind of roadbed side slope combination protection mechanization efficient construction method
CN108643205A (en) * 2018-06-25 2018-10-12 成都市市政工程(集团)有限责任公司 Arched framework slope protection construction method

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH086328B2 (en) * 1990-03-07 1996-01-24 ランデス株式会社 Slope conservation block
CN102392650A (en) * 2011-11-02 2012-03-28 中铁隧道集团有限公司 Non-explosive tunnel excavation construction method
CN105421470A (en) * 2015-11-18 2016-03-23 江西双德建筑工程有限公司 Construction method for assembled type anchor rod and arch framework combined type ecological slope protection
CN105649093A (en) * 2016-04-05 2016-06-08 山东净金新能源有限公司 Arch fixing rack for highway/railway tunnel and manufacturing method of arch fixing rack
CN108442390A (en) * 2018-03-26 2018-08-24 中铁三局集团有限公司 A kind of roadbed side slope combination protection mechanization efficient construction method
CN108643205A (en) * 2018-06-25 2018-10-12 成都市市政工程(集团)有限责任公司 Arched framework slope protection construction method

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115012430A (en) * 2021-12-27 2022-09-06 德州市公路工程总公司 Prestressed anchor cable frame type protective structure and construction method thereof

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Inventor after: Zhao Fengling

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Inventor after: An Yanwei

Inventor after: Wang Yongbin

Inventor after: Zhang Jinge

Inventor after: Zhang Guangle

Inventor after: Guo Dalin

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Application publication date: 20190820