CN110761126B - Rock foundation existing high-speed railway fine soil filling embankment side width structure and construction method - Google Patents
Rock foundation existing high-speed railway fine soil filling embankment side width structure and construction method Download PDFInfo
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- CN110761126B CN110761126B CN201911231962.7A CN201911231962A CN110761126B CN 110761126 B CN110761126 B CN 110761126B CN 201911231962 A CN201911231962 A CN 201911231962A CN 110761126 B CN110761126 B CN 110761126B
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- 239000011435 rock Substances 0.000 title claims abstract description 49
- 238000010276 construction Methods 0.000 title claims abstract description 29
- 239000002689 soil Substances 0.000 title claims abstract description 25
- 239000011150 reinforced concrete Substances 0.000 claims abstract description 67
- 229910000831 Steel Inorganic materials 0.000 claims description 25
- 239000010959 steel Substances 0.000 claims description 25
- 229910001294 Reinforcing steel Inorganic materials 0.000 claims description 7
- 239000000945 filler Substances 0.000 claims description 6
- 239000011159 matrix material Substances 0.000 claims description 6
- 238000009415 formwork Methods 0.000 claims description 2
- 238000000034 method Methods 0.000 claims description 2
- 238000003780 insertion Methods 0.000 claims 1
- 230000037431 insertion Effects 0.000 claims 1
- 230000002411 adverse Effects 0.000 description 8
- 235000021167 banquet Nutrition 0.000 description 5
- 230000002349 favourable effect Effects 0.000 description 5
- 230000009286 beneficial effect Effects 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 238000005553 drilling Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 230000007613 environmental effect Effects 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 239000004575 stone Substances 0.000 description 2
- 239000011083 cement mortar Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
Classifications
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- 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
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- Pit Excavations, Shoring, Fill Or Stabilisation Of Slopes (AREA)
Abstract
The invention discloses a embankment side-width structure for filling existing high-speed railway fine soil in a rock foundation and a construction method, wherein the side-width structure comprises a plurality of pile foundation supporting pieces which are arranged on an existing filling body side slope at intervals, and the bottoms of the pile foundation supporting pieces penetrate into the rock foundation; the grouting anchor rods are used for being arranged in the rock foundation at intervals outside the slope toe of the existing filling body; the cantilever retaining wall is arranged on the rock foundation at the outer side of the toe of the existing filling body, and all grouting anchor rods are connected to the bottom of the cantilever retaining wall; the upper width filling body and the existing filling body are respectively positioned at two sides of the cantilever retaining wall, and the upper width filling body is filled from the inner side to the outer side of the cantilever retaining wall; reinforced concrete plate sets up at pile foundation support piece, cantilever retaining wall and group wide and fills up body top to with pile foundation support piece top and cantilever retaining wall top fixed connection, reinforced concrete plate's one end is placed on the existing body curb structure that fills up, reinforced concrete plate's top surface and the top surface parallel and level of the existing body that fills up.
Description
Technical Field
The invention relates to the field of high-speed railway engineering, in particular to a embankment side-width structure filled with rock foundation existing high-speed railway fine soil and a construction method.
Background
The development of the high-speed railway in China is rapid, a large high-speed railway network in China is basically built at present, but with the continuous increase of local demands, the construction of high-speed railway branch networks is increasingly increased, and in the construction of the high-speed railway branch networks, a plurality of newly constructed high-speed railways need to be parallel to the existing high-speed railways, and even need to be built at the adjacent positions of the existing high-speed railways or need to widen the existing high-speed railways.
The high-speed railway has strict deformation requirements, the ballastless track high-speed railway is millimeter-grade deformation control, load is increased near the existing high-speed railway, adverse deformation of the existing high-speed railway is certainly caused, and when the existing high-speed railway is a embankment project, the adverse deformation influence of the later-stage addition is particularly obvious, and the method becomes a key control point for whether the newly-built high-speed railway can be implemented.
Disclosure of Invention
The invention aims at: aiming at the problems existing in the prior art, the invention provides a rock foundation existing high-speed railway fine soil embankment slope width filling structure and a construction method, which can effectively solve the technical problem that the existing high-speed railway embankment slope width deformation is difficult to control.
In order to achieve the above purpose, the technical scheme adopted by the invention is as follows:
a wide structure of a rock foundation existing high-speed railway fine soil filled embankment, comprising:
The pile foundation supports are arranged on the side slope of the existing filling body at intervals, and the bottoms of the pile foundation supports penetrate into the rock foundation;
The grouting anchor rods are used for being arranged in the rock foundation at intervals outside the slope toe of the existing filling body;
The cantilever retaining wall is arranged on the rock foundation outside the toe of the existing filling body, and all grouting anchor rods are connected to the bottom of the cantilever retaining wall;
the upper width filling body and the existing filling body are respectively positioned at two sides of the cantilever retaining wall, and the upper width filling body is filled from the inner side of the cantilever retaining wall to the outer side;
Reinforced concrete plate sets up pile foundation support piece the cantilever retaining wall with banket top is filled up to the group width, and with pile foundation support piece top with cantilever retaining wall top fixed connection, reinforced concrete plate's one end is placed on existing banket curb structure, reinforced concrete plate's top surface and the top surface parallel and level of existing banket.
The rock foundation existing high-speed railway fine-grained soil filling embankment wide structure is adopted, the pile foundation supporting pieces penetrate through the slope of the existing high-speed railway fine-grained soil filling body at intervals, supporting force can be provided for the reinforced concrete slab of the upper wide roadbed, so that large disturbance on the existing filling body is avoided, adverse load cannot be increased, the grouting anchor rod can provide large anti-overturning and anti-sliding capacity for the cantilever retaining wall, the cantilever retaining wall has high safety and small deformation, the upper wide filling body adopts high-speed railway common roadbed filling materials, investment can be saved, the cantilever retaining wall is used as a supporting foundation of the reinforced concrete slab, the upper wide filling body is folded, the new upper wide filling body cannot influence the existing filling body, and meanwhile, the cantilever retaining wall can provide supporting force for the reinforced concrete slab; the reinforced concrete slab is used as a bearing foundation of the existing high-speed railway side-width structure, has the functions of high strength, reduced transverse uneven settlement, no large influence on the existing filling body and the like, and the side-width structure effectively avoids the influence on the existing high-speed railway filling body.
Preferably, the top surface of the reinforced concrete slab is used for arranging a track structure.
Preferably, the grouting anchor is inserted into the rock foundation to a depth equal to or greater than 4m.
Preferably, the upper width filling body is a layered filling body.
Preferably, all pile foundation supports form a group pile with a cross-sectional dimension equal to or greater than 3m in length and equal to or greater than 2m in width.
Preferably, each pile foundation support comprises a micro pile, a connecting foundation and a support column, wherein the micro piles are arranged on the existing filling body side slope at intervals, the bottoms of the micro piles are inserted into the rock foundation, the connecting foundation is arranged at the tops of the micro piles, the support column is connected to the tops of the connecting foundation, and the tops of the support columns are connected to the bottoms of the reinforced concrete slabs.
Preferably, the depth of the mini pile inserted into the rock foundation is equal to or greater than 1m.
The invention also provides a construction method for constructing the embankment side-width structure by rock foundation existing high-speed rail fine soil, which comprises the following steps:
A. Constructing a plurality of micro piles on the existing filling body side slope, wherein all the micro piles are arranged in a matrix array, and the long edges of the matrix are longitudinally arranged along the line;
B. constructing the connection foundation of the reinforced concrete at the top of the miniature pile, wherein the steel bars of the connection foundation are fixedly connected with the steel bars of the miniature pile, and the top of the connection foundation is provided with exposed steel bars;
C. The support column of the reinforced concrete is constructed by standing a formwork, the support column steel bars are fixedly connected with the exposed steel bars of the connecting foundation, and the exposed steel bars are arranged at the top of the support column;
D. Constructing all grouting anchor rods on the rock foundation, wherein the grouting anchor rods are embedded into the rock foundation, and the tops of the grouting anchor rods are exposed out of the surface of the rock foundation;
E. constructing the cantilever retaining wall of reinforced concrete, wherein the cantilever retaining wall steel bars are fixedly connected with the exposed steel bars of the grouting anchor rods;
F. Filling the upper width filling body;
G. And after the upper width filling body is placed and deformed stably, constructing the reinforced concrete plate, wherein the reinforced concrete plate is fixedly connected with the exposed reinforcing steel bars of the support columns and the reserved reinforcing steel bars of the cantilever retaining wall respectively.
According to the construction method for constructing the embankment side-width structure by using the rock foundation existing high-speed rail fine-grained soil, the micro pile structures are arranged at intervals through the slope of the existing high-speed rail fine-grained soil filling body, and the supporting force can be provided for the reinforced concrete slab of the side-width roadbed through the arranged connecting foundation and the supporting columns, so that large disturbance to the existing filling body is avoided, adverse load is not increased, the micro piles are constructed step by adopting a small-diameter geological drilling machine, the influence on the existing high-speed rail is small, and the required supporting force can be provided for the reinforced concrete slab through the micro piles arranged at intervals; the connecting foundation can enhance the integrity of the micro pile and bring the beneficial support into play in a concentrated way; the support column transmits the favorable supporting force of the micro pile to the reinforced concrete slab; the grouting anchor rod can provide great anti-overturning and anti-sliding capabilities for the cantilever retaining wall, so that the cantilever retaining wall has high safety and generates small deformation, the side-width filling body adopts roadbed filler commonly used for high-speed rails, investment can be saved, and the cantilever retaining wall is also used as a supporting foundation of the reinforced concrete slab, and can carry out slope retraction on the side-width filling body, so that the novel side-width filling body cannot influence the existing filling body, and meanwhile, the cantilever retaining wall can provide supporting force for the reinforced concrete slab; the reinforced concrete slab is used as a bearing foundation of the existing high-speed rail upper width structure, and has the functions of high strength, reduced transverse uneven settlement, no great influence on the existing filling body and the like. The construction method has the characteristics of good deformation control effect, quick and convenient construction, safety, economy, reliability, environmental protection and the like, and is favorable for popularization and application.
Preferably, the upper width filling body is filled in layers.
Preferably, after the step G, a track structure of the top surface of the reinforced concrete slab is constructed.
In summary, due to the adoption of the technical scheme, the beneficial effects of the invention are as follows:
1. by applying the rock foundation existing high-speed rail fine-grained soil filling embankment wide structure, the pile foundation supporting pieces are arranged at intervals through the side slope of the existing high-speed rail fine-grained soil filling body, so that supporting force can be provided for the reinforced concrete slab of the banquet wide roadbed, large disturbance on the existing filling body is avoided, adverse load cannot be increased, the grouting anchor rod can provide large anti-overturning and anti-sliding capacity for the cantilever retaining wall, the cantilever retaining wall has high safety and small deformation, the banquet wide filling body adopts high-speed rail common roadbed filling materials, investment can be saved, the cantilever retaining wall is used as a supporting foundation of the reinforced concrete slab, the banquet wide filling body is folded, so that the new banquet wide filling body cannot influence the existing filling body, and meanwhile, the cantilever retaining wall can provide supporting force for the reinforced concrete slab; the reinforced concrete slab is used as a bearing foundation of the existing high-speed railway side-width structure, has the functions of high strength, reduced transverse uneven settlement, no large influence on the existing filling body and the like, and the side-width structure effectively avoids the influence on the existing high-speed railway filling body;
2. By applying the construction method for filling the embankment wide structure with the rock foundation existing high-speed rail fine-grained soil, the micro pile structures are arranged at intervals through the slope of the existing high-speed rail fine-grained soil filling body, and the supporting force can be provided for the reinforced concrete slab of the banquet wide roadbed through the arranged connecting foundation and the supporting columns, so that large disturbance to the existing filling body is avoided, adverse load is not increased, the micro piles are constructed by adopting a small-diameter geological drilling machine, the influence on the existing high-speed rail is small, and the required supporting force can be provided for the reinforced concrete slab through the micro piles arranged at intervals; the connecting foundation can enhance the integrity of the micro pile and bring the beneficial support into play in a concentrated way; the support column transmits the favorable supporting force of the micro pile to the reinforced concrete slab; the grouting anchor rod can provide great anti-overturning and anti-sliding capabilities for the cantilever retaining wall, so that the cantilever retaining wall has high safety and generates small deformation, the side-width filling body adopts roadbed filler commonly used for high-speed rails, investment can be saved, and the cantilever retaining wall is also used as a supporting foundation of the reinforced concrete slab, and can carry out slope retraction on the side-width filling body, so that the novel side-width filling body cannot influence the existing filling body, and meanwhile, the cantilever retaining wall can provide supporting force for the reinforced concrete slab; the reinforced concrete slab is used as a bearing foundation of the existing high-speed rail upper width structure, and has the functions of high strength, reduced transverse uneven settlement, no great influence on the existing filling body and the like. The construction method has the characteristics of good deformation control effect, quick and convenient construction, safety, economy, reliability, environmental protection and the like, and is favorable for popularization and application.
Drawings
Fig. 1 is a schematic diagram of a wide construction of a rock foundation existing high-speed rail fine soil filled embankment according to the present invention.
Icon: 01-rock foundation, 02-existing filling body, 1-micro pile, 2-connecting foundation, 3-supporting column, 4-grouting anchor rod, 5-cantilever retaining wall, 6-upper width filling body, 7-reinforced concrete slab and 8-track structure.
Detailed Description
The present invention will be described in detail with reference to the accompanying drawings.
The present invention will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present invention more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
Example 1
As shown in fig. 1, the present invention provides a rock foundation existing high-speed railway fine soil filled embankment side width structure, comprising:
The pile foundation supporting pieces comprise micro piles 1, connecting foundations 2 and supporting columns 3, wherein the micro piles 1 are arranged on the existing filling body 02 side slope at intervals in the longitudinal and transverse directions, the bottoms of the micro piles are inserted into the rock foundation 01, the connecting foundations 2 are arranged at the tops of the micro piles 1, and the supporting columns 3 are connected to the tops of the connecting foundations 2; specifically, the distance between two adjacent micro piles 1 is 0.4m-0.8m, the length of the section of each pile group formed by all the micro piles 1 is equal to or greater than 3m, the width of each pile group is equal to or greater than 2m, the center-to-center distance of a pile group foundation is equal to or less than 6m, and the depth of each micro pile 1 inserted into a rock foundation 01 is equal to or greater than 1m;
The grouting anchor rods 4 are arranged in the rock foundation 01 at intervals outside the slope toe of the existing filling body 02, and the depth of the grouting anchor rods 4 inserted into the rock foundation 01 is equal to or greater than 4m;
A cantilever retaining wall 5, which is arranged on the rock foundation 01 outside the toe of the existing filling body 02, wherein all grouting anchor rods 4 are connected to the bottom of the cantilever retaining wall 5;
The upper width filling body 6 and the existing filling body 02 are respectively positioned at two sides of the cantilever retaining wall 5, and the upper width filling body 6 is filled from the inner side of the cantilever retaining wall 5 to the outer side; specifically, the upper width filling body 6 is a layered filling structure body, the lower part of the upper width filling body 6 is filled with AB group filling materials, the top of the upper width filling body is provided with a graded broken stone layer, and the thickness of the graded broken stone layer is equal to or greater than 1m;
The reinforced concrete plate 7 is arranged at the tops of the support columns 3, the cantilever retaining wall 5 and the upper width filling body 6, and is fixedly connected with the tops of the support columns 3 and the cantilever retaining wall 5, one end of the reinforced concrete plate 7 is arranged on the road shoulder structure of the existing filling body 02, and the top surface of the reinforced concrete plate 7 is level with the top surface of the existing filling body 02; specifically, the thickness of the reinforced concrete slab 7 is equal to or greater than 50cm;
And the track structure 8 is arranged on the top surface of the reinforced concrete slab 7.
By applying the rock foundation existing high-speed railway fine-grained soil filling embankment wide structure, the pile foundation supporting pieces are arranged at intervals through the side slopes of the existing high-speed railway fine-grained soil filling body, so that supporting force can be provided for the reinforced concrete plates 7 of the upper wide roadbed, large disturbance on the existing filling body 02 is avoided, adverse load is not increased, the grouting anchor rods 4 can provide large anti-overturning and anti-sliding capacity for the cantilever retaining wall 5, the cantilever retaining wall 5 has high safety and small deformation, the upper wide filling body 6 adopts high-speed railway common roadbed filler, investment can be saved, the cantilever retaining wall 5 is also used as a supporting foundation of the reinforced concrete plates 7, the upper wide filling body 6 is contracted, the new upper wide filling body 6 can not influence the existing filling body 02, and meanwhile, the cantilever retaining wall 5 can provide supporting force for the reinforced concrete plates 7; the reinforced concrete slab 7 serves as a bearing foundation of the existing high-speed railway side-width structure, has the functions of high strength, reduced transverse uneven settlement, no large influence on the existing filling body 02 and the like, and the side-width structure effectively avoids the influence on the existing high-speed railway filling body.
Example 2
As shown in fig. 1, the construction method of the rock foundation existing high-iron fine-grained soil embankment wide structure according to the present invention is used for constructing the rock foundation existing high-iron fine-grained soil embankment wide structure according to embodiment 1, and comprises the following steps:
A. Constructing a plurality of micro piles 1 on the existing filling body 02 side slope in a stepping manner, adopting cement mortar for low-pressure grouting, wherein all the micro piles 1 are arranged in a matrix array, the long edge line of the matrix is longitudinally arranged, and the distance between two adjacent micro piles 1 is 0.4m-0.8m;
B. constructing the connection foundation 2 of reinforced concrete at the top of the micro pile 1, wherein main steel bars of the connection foundation 2 are fixedly connected with the steel bars of the micro pile 1, and exposed steel bars are arranged at the top of the connection foundation 2;
C. the support column 3 of reinforced concrete is constructed by standing a mould, the steel bars of the support column 3 are fixedly connected with the exposed steel bars of the connecting foundation 2, and the exposed steel bars are arranged at the top of the support column 3;
D. Constructing all grouting anchor rods 4 on the basis of a rock foundation 01, wherein the grouting anchor rods 4 are embedded into the rock foundation 01, and the surface of the rock foundation 01 exposed from the top of the grouting anchor rods is equal to or larger than 30cm;
E. Constructing the cantilever retaining wall 5 of reinforced concrete, wherein the reinforcing steel bars of the cantilever retaining wall 5 are fixedly connected with exposed reinforcing steel bars of the grouting anchor rods 4;
F. Filling the upper width filling body 6 in layers;
G. After the upper width filling body 6 is placed and deformed stably, constructing the reinforced concrete plate 7, wherein the steel bars of the reinforced concrete plate 7 are fixedly connected with the exposed steel bars of the support columns 3 and the reserved steel bars of the cantilever retaining wall 5 respectively;
H. And constructing a track structure 8 on the top surface of the reinforced concrete slab 7.
By applying the construction method for filling the embankment wide structure with the rock foundation existing high-speed rail fine-grained soil, the micro pile 1 structure is arranged at intervals through the slope of the existing high-speed rail fine-grained soil filling body, and the connecting foundation 2 and the supporting columns 3 are arranged to provide supporting force for the reinforced concrete slab 7 of the banquette roadbed, so that large disturbance to the existing filling body 02 is avoided, adverse load is not increased, the micro pile 1 is constructed step by adopting a small-diameter geological drilling machine, the influence on the existing high-speed rail is small, and the micro pile 1 arranged at intervals can provide required supporting force for the reinforced concrete slab 7; the connecting foundation 2 can enhance the integrity of the micro pile 1 and intensively exert the provided beneficial support; the support column 3 transmits the advantageous supporting force of the micro pile 1 to the reinforced concrete slab 7; the grouting anchor rods 4 can provide great anti-overturning and anti-sliding capabilities for the cantilever retaining wall 5, so that the cantilever retaining wall 5 has high safety and generates small deformation, the upper width filling body 6 adopts high-speed rail common roadbed filling materials, investment can be saved, the grouting anchor rods also serve as a supporting foundation of the reinforced concrete slab 7, the cantilever retaining wall 5 is used for carrying out slope retraction on the upper width filling body 6, and therefore the new upper width filling body 6 can not influence the existing filling body 02, and meanwhile, the cantilever retaining wall 5 can provide supporting force for the reinforced concrete slab 7; the reinforced concrete slab 7 has the functions of high strength, reduced transverse uneven settlement, no great influence on the existing filling body 02 and the like as a bearing foundation of the existing high-speed rail upper-width structure. The construction method has the characteristics of good deformation control effect, quick and convenient construction, safety, economy, reliability, environmental protection and the like, and is favorable for popularization and application.
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the invention.
Claims (8)
1. A construction method for filling a embankment side width structure by rock foundation existing high-speed railway fine-grained soil is characterized in that the embankment side width structure by rock foundation existing high-speed railway fine-grained soil comprises the following steps:
the pile foundation supports are arranged on the side slope of the existing filling body (02) at intervals, and the bottoms of the pile foundation supports penetrate into the rock foundation (01);
The grouting anchor rods (4) are arranged in the rock foundation (01) at the outer side of the slope toe of the existing filling body (02) at intervals;
The cantilever retaining wall (5) is arranged on the rock foundation (01) outside the toe of the existing filling body (02), and all grouting anchor rods (4) are connected to the bottom of the cantilever retaining wall (5);
The upper width filling body (6) and the existing filling body (02) are respectively positioned at two sides of the cantilever retaining wall (5), and the upper width filling body (6) is filled from the inner side of the cantilever retaining wall (5) to the outside;
The reinforced concrete plate (7) is arranged at the tops of the pile foundation support piece, the cantilever retaining wall (5) and the upper width filling body (6), and is fixedly connected with the tops of the pile foundation support piece and the cantilever retaining wall (5), one end of the reinforced concrete plate (7) is arranged on a road shoulder structure of the existing filling body (02), and the top surface of the reinforced concrete plate (7) is flush with the top surface of the existing filling body (02);
each pile foundation support piece comprises a micro pile (1), a connecting foundation (2) and support columns (3), wherein the micro piles (1) are arranged on an existing filling body (02) side slope at intervals, the bottoms of the micro piles are inserted into a rock foundation (01), the connecting foundation (2) is arranged at the tops of the micro piles (1), the support columns (3) are connected to the tops of the connecting foundation (2), and the tops of the support columns (3) are connected to the bottoms of reinforced concrete plates (7);
the construction method comprises the following steps:
A. Constructing a plurality of micro piles (1) on the side slope of the existing filling body (02), wherein all the micro piles (1) are arranged in a matrix array, and the long edges of the matrix are longitudinally arranged along the line;
B. Constructing the connection foundation (2) of reinforced concrete at the top of the micro pile (1), wherein the steel bars of the connection foundation (2) are fixedly connected with the steel bars of the micro pile (1), and the exposed steel bars are arranged at the top of the connection foundation (2);
C. The support column (3) is used for vertical formwork construction of reinforced concrete, steel bars of the support column (3) are fixedly connected with exposed steel bars of the connecting foundation (2), and exposed steel bars are arranged at the top of the support column (3);
D. Constructing all grouting anchor rods (4) on the basis of a rock foundation (01), wherein the grouting anchor rods (4) are embedded into the rock foundation (01), and the tops of the grouting anchor rods are exposed out of the surface of the rock foundation (01);
E. the cantilever retaining wall (5) of reinforced concrete is constructed, and the steel bars of the cantilever retaining wall (5) are fixedly connected with exposed steel bars of the grouting anchor rods (4);
F. Filling the upper width filling body (6);
G. After the upper width filling body (6) is placed and deformed stably, the reinforced concrete plate (7) is constructed, and the reinforcing steel bars of the reinforced concrete plate (7) are fixedly connected with the exposed reinforcing steel bars of the support columns (3) and the reserved reinforcing steel bars of the cantilever retaining wall (5) respectively.
2. Construction method according to claim 1, characterized in that the top surface of the reinforced concrete slab (7) is used for arranging a track structure (8).
3. Construction method according to claim 1, characterized in that the grouting anchor (4) is inserted into the rock foundation (01) to a depth equal to or greater than 4m.
4. The construction method according to claim 1, characterized in that the upper width filler (6) is a layered earth filler structure.
5. The construction method according to claim 1, wherein all the pile foundation supports form a group pile having a cross-sectional dimension equal to or greater than 3m in length and equal to or greater than 2m in width.
6. Construction method according to claim 1, characterized in that the depth of insertion of the micropile (1) into the rock foundation (01) is equal to or greater than 1m.
7. Construction method according to claim 1, characterized in that the upper width filler (6) is filled in layers.
8. The method of construction according to any one of claims 1-7, wherein after step G, a track structure (8) of the top surface of the reinforced concrete slab (7) is constructed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911231962.7A CN110761126B (en) | 2019-12-04 | 2019-12-04 | Rock foundation existing high-speed railway fine soil filling embankment side width structure and construction method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201911231962.7A CN110761126B (en) | 2019-12-04 | 2019-12-04 | Rock foundation existing high-speed railway fine soil filling embankment side width structure and construction method |
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| CN110761126A CN110761126A (en) | 2020-02-07 |
| CN110761126B true CN110761126B (en) | 2024-05-24 |
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