CN113756313A - Construction method of embedded road in steep mountain land - Google Patents
Construction method of embedded road in steep mountain land Download PDFInfo
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- CN113756313A CN113756313A CN202111022971.2A CN202111022971A CN113756313A CN 113756313 A CN113756313 A CN 113756313A CN 202111022971 A CN202111022971 A CN 202111022971A CN 113756313 A CN113756313 A CN 113756313A
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- 238000010276 construction Methods 0.000 title claims abstract description 64
- 238000009412 basement excavation Methods 0.000 claims abstract description 40
- 239000004575 stone Substances 0.000 claims abstract description 15
- 238000004140 cleaning Methods 0.000 claims abstract description 14
- 238000009966 trimming Methods 0.000 claims abstract description 9
- 239000011435 rock Substances 0.000 claims abstract description 8
- 238000010899 nucleation Methods 0.000 claims abstract description 4
- 239000007921 spray Substances 0.000 claims abstract description 4
- 238000000034 method Methods 0.000 claims description 18
- 230000007704 transition Effects 0.000 claims description 6
- 229910000831 Steel Inorganic materials 0.000 claims description 3
- 239000010959 steel Substances 0.000 claims description 3
- 239000002699 waste material Substances 0.000 claims description 2
- 238000005422 blasting Methods 0.000 claims 1
- 238000011084 recovery Methods 0.000 description 7
- 239000002689 soil Substances 0.000 description 7
- 238000013461 design Methods 0.000 description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 239000002893 slag Substances 0.000 description 3
- 238000005452 bending Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 238000005096 rolling process Methods 0.000 description 2
- 241000196324 Embryophyta Species 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 230000001174 ascending effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 230000003139 buffering effect Effects 0.000 description 1
- 238000005056 compaction Methods 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 238000004162 soil erosion Methods 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
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Classifications
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D17/00—Excavations; Bordering of excavations; Making embankments
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
- E01C3/00—Foundations for pavings
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
- E01C3/00—Foundations for pavings
- E01C3/04—Foundations produced by soil stabilisation
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02B—HYDRAULIC ENGINEERING
- E02B11/00—Drainage of soil, e.g. for agricultural purposes
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02B—HYDRAULIC ENGINEERING
- E02B11/00—Drainage of soil, e.g. for agricultural purposes
- E02B11/02—Drainage device- laying apparatus, e.g. drainage ploughs
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D17/00—Excavations; Bordering of excavations; Making embankments
- E02D17/20—Securing of slopes or inclines
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D29/00—Independent underground or underwater structures; Retaining walls
- E02D29/02—Retaining or protecting walls
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Civil Engineering (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Paleontology (AREA)
- Agronomy & Crop Science (AREA)
- Mechanical Engineering (AREA)
- Architecture (AREA)
- Environmental & Geological Engineering (AREA)
- Road Paving Structures (AREA)
Abstract
The invention belongs to the technical field of capital construction, and particularly discloses a construction method of an embedded road in a steep mountain land. The construction method of the embedded road in the steep mountain land comprises the following steps: measuring and paying off, namely paying off coordinates of a road mileage point and an elevation of a road center point by using a GPS (global positioning system) according to an original control point of the coordinates; the construction is started from the upper line, the excavation is carried out step by step according to the sequence from top to bottom, and the excavation is carried out step by step to reinforce so as to form the embedded road of the fully excavated roadbed; trimming an upper slope, namely removing and trimming broken overhanging dangerous rocks and broken blocks, and trimming local steep slope sections and excavating strong weathered layers; excavating a ditch, and checking the states of a foundation trench and a side slope to carry out earthwork excavation sequentially from top to bottom in a layered and segmented manner; greening the upper slope, cleaning rock surface broken stones and loose layers to level the slope surface, and carrying out spray seeding construction. By adopting the form of the fully excavated roadbed, the full section strength of the roadbed is obviously improved, and the transportation safety of large parts is fundamentally ensured.
Description
Technical Field
The invention belongs to the technical field of capital construction, and particularly relates to a construction method of an embedded road in a steep mountain land.
Background
Road construction is used as a key link in mountainous wind power plant construction engineering, and the advancement of the design scheme and the construction concept directly relates to vegetation disturbance and recovery, water conservation and environmental protection construction investment and engineering progress, so that the construction cost and the social evaluation of projects are influenced. For traditional mountain wind power plant construction, road design and construction are mainly based on the economical efficiency and the construction period, a 'half-digging and half-filling' scheme is usually adopted, excavated earth and stone are directly filled back to a lower slope, if a mountain body with a steep slope (the slope ratio is steeper than 1:2.5) is encountered, the downward extension of the filling slope cannot be controlled, the phenomena of collapse of the lower slope, water and soil loss, large-area damage of original vegetation and the like are easily caused, meanwhile, engineering measures, blocking and vegetation recovery measures are required for the disturbed or damaged lower slope, the construction difficulty is high, the investment cost is high, and the recovery effect cannot be guaranteed. In addition, the filling at the steep mountain is difficult to compact, so that the stability of the filling side slope on site is poor, the safety of vehicles cannot be guaranteed during large transportation in engineering construction, and the lower side slope is easy to collapse through rain wash and heavy vehicle rolling, so that water and soil loss and landslide are further caused, the vegetation on the mountain is damaged, and even the safety of downstream villages is influenced.
Disclosure of Invention
The invention provides an embedded road construction method for a steep mountain land, which aims to solve the technical problems of insufficient road surface strength and ecological environment damage caused by difficulty in compaction in the process of constructing a wind power plant road on the steep mountain land.
In order to achieve the purpose, the invention adopts the following technical scheme:
an embedded road construction method for a steep mountain land comprises the following steps:
measuring and paying off, namely paying off coordinates of a road mileage point and an elevation of a road center point by using a GPS (global positioning system) according to an original control point of the coordinates;
excavating the road, wherein construction is started from an upper line during excavation, the road is excavated step by step according to the sequence from top to bottom, and the road is reinforced step by step through excavation to form the embedded road of the fully-excavated roadbed;
trimming an upper slope, namely removing and trimming broken overhanging dangerous rocks and broken blocks, and trimming local steep slope sections and excavating strong weathered layers;
excavating a ditch, and checking the states of a foundation trench and a side slope to carry out earthwork excavation sequentially from top to bottom in a layered and segmented manner;
greening the upper slope, cleaning rock surface broken stones and loose layers to level the slope surface, and carrying out spray seeding construction.
The invention is further improved in that: the road excavation process also comprises road surface cleaning, and the depth of a stripping layer of the road surface cleaning is 0.3-0.5 m.
The invention is further improved in that: and in the road excavation process, the excavation sideline is translated towards the inner side of the mountain.
The invention is further improved in that: and excavating inwards from the side slope in the road excavating process.
The invention is further improved in that: when the stone volume is larger than the preset maximum stone volume in the road excavation process, crushing from top to bottom by adopting a cannon hammer construction.
The invention is further improved in that: and backfilling when the gully and the road inward-bending radius are smaller than the preset turning radius of the transport vehicle in the road excavating process, and transporting the rest of earthwork to an earth abandoning site.
The invention is further improved in that: the road excavation process also comprises three lower slope protection measures, firstly, surface cleaning branches are transversely placed on the outer side of the road to serve as first protection; secondly, two layers of steel wire meshes are respectively arranged at the distances of 5 meters and 10 meters from the lower slope to serve as second protection; and finally, piling up a retaining wall on the lower side slope to serve as a third protection.
The invention is further improved in that: in the road excavation process, for the road sections with the excavation depth exceeding 20 m, a multi-level slope-releasing scheme is adopted, and a graded transition platform is arranged between stages.
The invention is further improved in that: when the slope ratio of the upper slope to the lower slope is less than 1: when 0.6, the width of the grading transition platform is more than or equal to 1 meter.
Compared with the prior art, the invention has the following advantages:
1. by adopting the form of the fully excavated roadbed, the full section strength of the roadbed is obviously improved, and the transportation safety of large parts is fundamentally ensured.
2. According to the construction method, the original ecological environment is maintained to be zero-damaged on the lower slope; the greening restoration is carried out uniformly, and the traditional bottom slope zero-dispersion water environmental protection measures are optimized into intensive treatment measures, so that the influence on the ecological environment is reduced to the minimum; collapse and soil erosion of the lower slope are avoided.
3. According to the construction method, the retaining wall design and vegetation recovery measures are not needed for the lower slope, the total construction period is shortened, the total construction cost of the project is further reduced, and the total construction cost is saved by more than 5% in the road construction per kilometer.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate exemplary embodiments of the invention and together with the description serve to explain the invention and not to limit the invention. In the drawings:
FIG. 1 is an overall flow chart of an embedded road construction method for a steep mountain area according to the present invention;
fig. 2 is a schematic view of a multistage slope-releasing structure of the construction method of the embedded road in the steep mountain land.
Detailed Description
The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings. It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.
The following detailed description is exemplary in nature and is intended to provide further details of the invention. Unless otherwise defined, all technical terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the invention.
As shown in fig. 1, the embedded road construction method for the steep mountain land of the invention comprises the following steps:
and measuring the paying-off. Carrying out measurement according to the principle of 'controlling low precision from whole to local part with high precision'; and according to the original control point of the coordinates, using a GPS to emit coordinates of the road mileage point and the road center point elevation, retesting in time in the construction process, and adjusting the coordinates and the elevation according to the actual situation on site.
And (3) excavating the road, wherein construction is carried out from the upper line, the road is excavated step by step according to the sequence from top to bottom, the slope excavation adopts a mechanical cooperation manual mode, the excavation is reinforced step by step, and finally the road of the full-excavation roadbed in the form of the embedded mountain is formed.
And (6) finishing an upper slope. Removing and repairing the broken suspension convex dangerous rock and broken block; carrying out squaring and strong weathering layer excavation on the local steep slope section; and removing all garbage, weeds, tree roots, waste residues and surface soil in the specified area.
And (5) excavating a ditch. Adopting a mechanical and manual matching mode, sequentially carrying out earthwork excavation in a layered and segmented mode, and checking the states of a foundation trench and a side slope at any time to prevent collapse.
And (5) greening the upper slope. And (4) cleaning rock surface broken stones, a loose layer and the like, leveling the slope surface and carrying out spray seeding construction.
And optimizing and determining a construction scheme before construction. The construction scheme is made by comprehensively considering the expenses of road construction, temporary land use, vegetation recovery, protective measures and the like and comparing and selecting the lowest total construction cost of the project as an optimization target.
In the construction preparation stage, on-site investigation is carried out to verify the construction, pipelines and actual geological conditions in the construction range, and the design scheme and drawings are checked; and (4) preparing a measuring instrument, enabling a measurer to be familiar with construction drawings and schemes in advance, and checking and verifying construction paying-off bases.
The control indexes when the construction scheme is determined in an optimized mode comprise: 1. the total amount of excavation and filling is minimal; 2. the total vegetation recovery amount of the upper slope and the lower slope is minimum; 3. the retaining wall engineering quantity is minimum; 4. the quantity of ditch engineering is minimum; and (3) using the mountain land topographic map with the measurement accuracy of more than 1:500 to reduce the influence of manufacturing cost deviation caused by topographic map distortion and determine the optimal road path. The road excavation process also comprises road surface cleaning, the depth of a stripping layer of the road surface cleaning is controlled within 0.3-0.5 m, and the condition that muck falls down a side slope due to excessive surface cleaning is avoided. In the road excavation process, the excavation sideline is translated towards the inner side of the mountain body, so that the outer side of the roadbed is blocked by a natural small soil slope, and slag sliding of a lower side slope is prevented; the excavation operation is performed from the side slope to the inside, the excavation can not be performed in the direction parallel to the side slope, and the slag soil is prevented from rolling down to the side slope; when the square stone is large in size, the big gun hammer is used for construction, the square stone is broken from top to bottom, the large-sized block stone is timely solved, the broken square stone is timely loaded and transported, and the sliding of the stone blocks caused by the accumulation of a large amount of square stones is avoided. In the road excavation process, all the residual soil is transported to a soil abandoning site except for the fact that backfilling is required except for gullies and the turning radius of a large transport vehicle which cannot be met by the inner bending radius of the road.
Three lower slope protection measures can be arranged according to the requirements in the road excavation process. Firstly, the surface cleaning branches are transversely placed on the outer side of the road, and the primary interception and buffering effects are achieved. Secondly, two layers of steel wire meshes are respectively arranged on the lower slope at the distances of 5 meters and 10 meters to serve as 'passive protection' measures. And finally, manually piling up a temporary retaining wall on the lower slope to prevent slag sliding and landslide.
In the road excavation process, for the excavation depth of more than 20 meters, a multi-stage slope-releasing scheme is adopted, and a graded transition platform is arranged between stages, as shown in fig. 2. Wherein, the slope ratio of the slope ascending and the slope descending is less than 1: 0.6, the width of the transition platform is not less than 1 meter.
The lower slope does not need retaining wall design and vegetation recovery measures, the total construction period is shortened, the total construction cost of the project is further reduced, and the total construction cost is saved by more than 5% in road construction per kilometer.
It will be appreciated by those skilled in the art that the invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The embodiments disclosed above are therefore to be considered in all respects as illustrative and not restrictive. All changes which come within the scope of or equivalence to the invention are intended to be embraced therein.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solutions of the present invention and not for limiting the same, and although the present invention is described in detail with reference to the above embodiments, those of ordinary skill in the art should understand that: modifications and equivalents may be made to the embodiments of the invention without departing from the spirit and scope of the invention, which is to be covered by the claims.
Claims (9)
1. The construction method of the embedded road in the steep mountain land is characterized by comprising the following steps:
measuring and paying off, namely paying off coordinates of a road mileage point and an elevation of a road center point by using a GPS (global positioning system) according to an original control point of the coordinates;
excavating the road, wherein construction is started from an upper line during excavation, the road is excavated step by step according to the sequence from top to bottom, and the road is reinforced step by step through excavation to form the embedded road of the fully-excavated roadbed;
trimming an upper slope, namely removing and trimming broken overhanging dangerous rocks and broken blocks, and trimming local steep slope sections and excavating strong weathered layers;
excavating a ditch, and checking the states of a foundation trench and a side slope to carry out earthwork excavation sequentially from top to bottom in a layered and segmented manner;
greening the upper slope, cleaning rock surface broken stones and loose layers to level the slope surface, and carrying out spray seeding construction.
2. The embedded road construction method for steep mountainous regions as claimed in claim 1, further comprising road surface cleaning during road excavation, wherein the depth of a stripping layer of the road surface cleaning is 0.3 m-0.5 m.
3. The embedded road construction method for the steep mountainous region as claimed in claim 1, wherein the excavation sideline is translated towards the inner side of the mountain body in the road excavation process.
4. The embedded road construction method for steep mountainous areas according to claim 1, wherein the road is excavated inward from a side slope during excavation.
5. The embedded road construction method for the steep mountainous region as claimed in claim 1, wherein blasting hammer construction is adopted to crush from top to bottom when the stone volume is larger than a preset maximum stone volume during the road excavation process.
6. The embedded road construction method for steep mountains as claimed in claim 1, wherein backfilling is performed when gully and road inside-curve radius are smaller than preset vehicle turning radius during road excavation, and the rest of earthwork is transported to a waste site.
7. The embedded road construction method for the steep mountainous region as claimed in claim 1, wherein the road excavation process further comprises three lower slope protection measures, firstly, transversely placing surface cleaning branches on the outer side of the road as a first protection; secondly, two layers of steel wire meshes are respectively arranged at the distances of 5 meters and 10 meters from the lower slope to serve as second protection; and finally, piling up a retaining wall on the lower side slope to serve as a third protection.
8. The embedded road construction method for the steep mountainous region as claimed in claim 1, wherein a multi-stage slope-releasing scheme is adopted for the road section with the excavation depth of more than 20 m in the road excavation process, and a stage transition platform is arranged between stages.
9. The embedded road construction method for steep mountainous regions according to claim 8, wherein when the slope ratio of the upper slope to the lower slope is less than 1: when 0.6, the width of the grading transition platform is more than or equal to 1 meter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111022971.2A CN113756313A (en) | 2021-09-01 | 2021-09-01 | Construction method of embedded road in steep mountain land |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111022971.2A CN113756313A (en) | 2021-09-01 | 2021-09-01 | Construction method of embedded road in steep mountain land |
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| Publication Number | Publication Date |
|---|---|
| CN113756313A true CN113756313A (en) | 2021-12-07 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202111022971.2A Pending CN113756313A (en) | 2021-09-01 | 2021-09-01 | Construction method of embedded road in steep mountain land |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10280333A (en) * | 1996-12-20 | 1998-10-20 | Fatzer Ag | Protection net against snowfall and rockslide |
| KR20050082986A (en) * | 2004-02-20 | 2005-08-24 | 프리 코교 가부시키가이샤 | Method of enlarging road width and preventing falling stone |
| CN110306571A (en) * | 2019-07-03 | 2019-10-08 | 中铁二十五局集团第五工程有限公司 | A kind of cutting excavation construction method |
| CN209605686U (en) * | 2018-12-28 | 2019-11-08 | 中铁二十五局集团第五工程有限公司 | Close on both wired deep desulphurization blast working safety protection components |
| CN110924407A (en) * | 2019-12-04 | 2020-03-27 | 中国电建集团江西省水电工程局有限公司 | Construction method for maintaining water and soil on lower slope without disturbance |
-
2021
- 2021-09-01 CN CN202111022971.2A patent/CN113756313A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10280333A (en) * | 1996-12-20 | 1998-10-20 | Fatzer Ag | Protection net against snowfall and rockslide |
| KR20050082986A (en) * | 2004-02-20 | 2005-08-24 | 프리 코교 가부시키가이샤 | Method of enlarging road width and preventing falling stone |
| CN209605686U (en) * | 2018-12-28 | 2019-11-08 | 中铁二十五局集团第五工程有限公司 | Close on both wired deep desulphurization blast working safety protection components |
| CN110306571A (en) * | 2019-07-03 | 2019-10-08 | 中铁二十五局集团第五工程有限公司 | A kind of cutting excavation construction method |
| CN110924407A (en) * | 2019-12-04 | 2020-03-27 | 中国电建集团江西省水电工程局有限公司 | Construction method for maintaining water and soil on lower slope without disturbance |
Non-Patent Citations (1)
| Title |
|---|
| 华锡江等: "山地风电场道路"下边坡零扰动"技术应用研究", 《2020年江西省电机工程学会年会论文集》 * |
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Application publication date: 20211207 |
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