CN111576492A - Construction method for backfilling sand gravel above subway station - Google Patents
Construction method for backfilling sand gravel above subway station Download PDFInfo
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- CN111576492A CN111576492A CN202010372119.7A CN202010372119A CN111576492A CN 111576492 A CN111576492 A CN 111576492A CN 202010372119 A CN202010372119 A CN 202010372119A CN 111576492 A CN111576492 A CN 111576492A
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D31/00—Protective arrangements for foundations or foundation structures; Ground foundation measures for protecting the soil or the subsoil water, e.g. preventing or counteracting oil pollution
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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
- E01C19/00—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving
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Abstract
The invention discloses a construction method for backfilling sand gravel above a subway station, which comprises the following steps: a. removing vegetation on the earth surface; b. dividing a square road section to be constructed into a plurality of square construction units; c. paving a first reference pavement and a second reference pavement; d. setting four staggered starting points and starting construction; e. when the interval has L to treat the square construction unit of being under construction between the square construction unit of sand gravel has been laid at same capable both ends, stop two construction routes that the construction direction is the same, two remaining construction routes keep the construction, until whole square highway section has all laid sand gravel, avoided two construction routes on the same direction to be under construction simultaneously at same row, divide into four non-block that meet with basic construction unit, it is shallow to prevent because of station tunnel roof earthing depth, destroy subway frame waterproof layer and safety structure easily when carrying out the large tracts of land construction simultaneously.
Description
Technical Field
The invention relates to the field of road construction, in particular to a construction method for backfilling sand gravel above a subway station.
Background
Newly-built construction road is directly over current operation subway station, and the coincidence completely, but station tunnel roof earthing depth is more shallow, and subway frame waterproof layer and safety structure are destroyed easily to conventional road construction mode, and the efficiency of construction of traditional one-way construction is lower.
Disclosure of Invention
The invention aims to provide a construction method for backfilling sand gravel above a subway station, which solves the problems that a waterproof layer and a safety structure of a subway frame are easy to damage in a conventional road construction mode, and the construction efficiency of the traditional one-way construction is low.
The invention is realized by the following technical scheme:
a construction method for backfilling sand and gravel above a subway station is characterized by comprising the following steps:
a. removing surface vegetation on the upper surface of the square road section to be constructed;
b. dividing a square road section to be constructed into a plurality of square construction units distributed in a matrix of two rows and N columns;
the matrix of two rows and N columns is specifically distributed as follows: dividing the long edge of the square road section into N rows of square construction units for arrangement, and dividing the wide edge of the square road section into two rows of square construction units for arrangement;
c. paving sand and gravel along M square construction units on the same row in the central axis direction of the long side of the square road section by taking two opposite angles of the square road section as starting points to form a first reference road surface positioned at the opposite angle on the square road section and a second reference road surface positioned at the opposite angle under the square road section;
d. taking the square construction unit of the first row below the first reference pavement as a first starting point, taking the square construction unit of the M +1 th row in the same row with the first reference pavement as a second starting point, taking the square construction unit of the Nth row above the second reference pavement as a third starting point, taking the square construction unit of the Nth-M row in the same row with the second reference pavement as a fourth starting point, taking the first starting point, the second starting point, the third starting point and the fourth starting point as construction starting points, taking the square construction unit as the minimum construction unit area, dividing into four construction lines, and paving sand and gravel synchronously and at the same speed along the central axis direction of the long side of the square road section;
e. when L square construction units to be constructed are arranged between the square construction units with the sand gravel laid at the two ends of the same row at intervals, two construction lines with the same construction direction are stopped, and the remaining two construction lines are kept in construction until the sand gravel is laid on the whole square road section.
In the step a, a square road section to be constructed is divided into a plurality of square construction units distributed in a matrix of two rows and N columns, a minimum construction area unit is established, each construction coordinate position is established, and accurate command during construction is facilitated.
The paving of a section of road surface is completed on two opposite angles of the square road section to be constructed in the step b, starting points of four engineering lines in the step c are staggered, two construction lines in the same direction are prevented from being constructed simultaneously in the same row, a basic construction unit is divided into four non-connected blocks, the situation that a subway frame waterproof layer and a safety structure are damaged easily when large-area construction is carried out simultaneously due to the fact that the soil covering depth of a station tunnel top plate is shallow is prevented, meanwhile, the four staggered construction lines are divided into two groups to be constructed in a modularized mode in opposite directions, and construction efficiency is greatly improved.
Furthermore, the square construction unit has an area of 50 to 80 square meters and a horizontal-vertical proportion of 1:1 to 2: 1.
Different minimum construction areas are selected according to the thickness of the tunnel roof soil covering below the road to be constructed, and the minimum construction units with different transverse-longitudinal ratios can be selected according to different road widths.
Furthermore, the numerical range of M is 3-6, and the numerical range of L is 2-5.
The staggered certain safety distance of the two construction lines at the same end is ensured, and the waterproof layer and the safety structure of the subway frame are prevented from being damaged.
Further, the sand and gravel laying method comprises the following steps:
A. the distance from the layer-by-layer downward excavation to the top of the ground iron tunnel frame body is 50 cm-80 cm;
B. carrying out rolling treatment on undisturbed soil, backfilling and rolling sand gravel layer by layer, and excavating a next square construction unit;
the undisturbed soil is a soil layer between the top of the subway tunnel frame body and the ground surface.
Further, the thickness of each layer excavated downwards in the step A is not more than 0.5 m.
Furthermore, in the step A and the step B, measuring devices are arranged to monitor the excavation depth and the deformation amount of the whole outline of the square construction unit in real time while the downward excavation and the upward backfilling are carried out in a layering mode.
Further, the backfill height of each layer in the step B is 0.3-0.4 m.
Compared with the prior art, the invention has the following advantages and beneficial effects:
1. the construction method for backfilling sand gravel above the subway station avoids two construction routes in the same direction from being constructed at the same row at the same time, divides a basic construction unit into four unconnected blocks, and prevents a waterproof layer and a safety structure of a subway frame from being easily damaged during large-area construction due to shallow soil covering depth of a tunnel top plate of the station;
2. according to the construction method for backfilling the sand gravel above the subway station, four staggered construction routes are constructed in two groups in opposite direction in a modularized mode, and the construction efficiency is greatly improved.
Drawings
The accompanying drawings, which are included to provide a further understanding of the embodiments of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the principles of the invention. In the drawings:
fig. 1 is a schematic diagram of a square road section structure according to the present invention.
FIG. 2 is a schematic view of the construction direction of the present invention.
Reference numbers and corresponding part names in the drawings:
1-square road section, 11-first reference surface, 12-second reference surface, and 111-square construction unit.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to examples and accompanying drawings, and the exemplary embodiments and descriptions thereof are only used for explaining the present invention and are not meant to limit the present invention.
Example 1
As shown in fig. 1-2, the construction method for backfilling sand and gravel above a subway station comprises the following steps:
a. removing surface vegetation on the upper surface of the square road section 1 to be constructed;
b. dividing a square road section 1 to be constructed into a plurality of square construction units 111 distributed in a matrix of two rows and N columns;
the matrix of two rows and N columns is specifically distributed as follows: dividing the long side of the square road section 1 into N rows of square construction units 111 for arrangement, and dividing the wide side of the square road section 1 into two rows of square construction units 111 for arrangement;
c. paving sand and gravel on M square construction units 111 which are positioned on the same row along the central axis direction of the long side of the square road section 1 by taking two opposite angles of the square road section 1 as starting points to form a first reference road surface 11 positioned at the opposite angle of the square road section 1 and a second reference road surface 12 positioned at the opposite angle of the square road section;
d. the method comprises the steps of taking square construction units 111 in a first row and a first column below a first reference road surface 11 as a first starting point, taking square construction units 111 in an M +1 th row in the same row as the first reference road surface 11 as a second starting point, taking square construction units 111 in an Nth row on a second reference road surface 12 as a third starting point, taking square construction units 111 in an N-M th row in the same row as the second reference road surface 12 as a fourth starting point, taking the first starting point, the second starting point, the third starting point and the fourth starting point as construction starting points, and taking the square construction units 111 as the minimum construction unit area, dividing four construction lines, and paving sand and gravel synchronously and at the same speed along the central axis direction of the long side of a square road section 1;
e. when L square construction units 111 to be constructed are arranged between the square construction units 111 with the sand gravel paved at the two ends of the same row at intervals, two construction lines with the same construction direction are stopped, and the remaining two construction lines are kept in construction until the sand gravel is paved on the whole square road section 1.
In the step a, the square road section 1 to be constructed is divided into a plurality of square construction units 111 distributed in a matrix of two rows and N columns, a minimum construction area unit is established, each construction coordinate position is established, and accurate command during construction is facilitated.
The paving of a section of road surface is completed on two opposite angles of the square road section 1 to be constructed in the step b, so that the starting points of the four engineering lines in the step c are staggered, the simultaneous construction of two construction lines in the same direction in the same row is avoided, a basic construction unit is divided into four non-connected blocks, the situation that the waterproof layer and the safety structure of the subway frame are easily damaged when large-area construction is carried out simultaneously due to shallow soil covering depth of a station tunnel top plate is prevented, meanwhile, bidirectional modular construction is carried out, and the construction efficiency is greatly improved.
The square construction unit 111 has the area of 50 to 80 square meters and the horizontal-vertical proportion of 1:1 to 2: 1.
Different minimum construction areas are selected according to the thickness of the tunnel roof soil covering below the road to be constructed, and the minimum construction units with different transverse-longitudinal ratios can be selected according to different road widths.
The numerical range of M is 3-6, and the numerical range of L is 2-5.
The staggered certain safety distance of the two construction lines at the same end is ensured, and the waterproof layer and the safety structure of the subway frame are prevented from being damaged.
Example 2
Based on the above embodiment 1, the sand and gravel laying method comprises the following steps:
A. the distance from the layer-by-layer downward excavation to the top of the ground iron tunnel frame body is 50 cm-80 cm;
B. performing rolling treatment on undisturbed soil (a mud layer between the top of a subway tunnel frame body and the ground surface), backfilling layer by layer, rolling sand gravel, and excavating a next square construction unit 111;
and B, the thickness of each layer excavated downwards in the step A is not more than 0.5 m.
And in the step A and the step B, measuring devices are arranged to monitor the excavation depth and the deformation quantity of the whole outline of the square construction unit 111 in real time while the downward excavation and the upward backfilling are carried out in a layering manner.
And B, the backfill height of each layer in the step B is 0.3-0.4 m.
Example 3
As shown in fig. 1-2, the construction method for backfilling sand and gravel above a subway station comprises the following steps:
a. removing surface vegetation on the upper surface of the square road section 1 to be constructed;
b. dividing a square road section 1 to be constructed into a plurality of square construction units 111 distributed in a two-row 20-column matrix manner;
the matrix with two rows and 20 columns is specifically distributed as follows: dividing the long side of the square road section 1 into 20 rows of square construction units 111 for arrangement, and dividing the wide side of the square road section 1 into two rows of square construction units 111 for arrangement;
c. paving sand and gravel along 3 square construction units 111 on the same row in the central axis direction of the long edge of the square road section 1 by taking the upper left corner and the lower right corner of the square road section 1 as starting points to form a first reference road surface 11 positioned at the upper diagonal of the square road section 1 and a second reference road surface 12 positioned at the lower diagonal of the square road section 1;
d. taking a square construction unit 111 with coordinates (1,4), (2,1), (1,20) and (2,17) in a matrix as a construction starting point, taking the square construction unit 111 as a minimum construction unit area, dividing four construction lines, and paving sand gravel along the central axis direction of the long side of the square road section 1 synchronously and at the same speed;
the coordinate system in the matrix of the invention is as follows: the lower left corner of the square road segment 1 is taken as the origin (0,0) of the coordinate system, the direction from the lower left corner to the right is taken as the positive direction of the X axis, and the direction from the lower left corner to the upper is taken as the positive direction of the Y axis.
e. When 3 square construction units 111 to be constructed are arranged between the square construction units 111 with the sand gravel paved at the two ends of the same row at intervals, two construction lines on the right side are stopped, and two construction lines on the left side are kept in construction until the sand gravel is paved on the whole square road section 1.
In the step a, the square road section 1 to be constructed is divided into a plurality of square construction units 111 distributed in a matrix of 20 rows and 20 columns, a minimum construction area unit is established, each construction coordinate position is established, and accurate command during construction is facilitated.
The paving of a section of road surface is completed on two opposite angles of the square road section 1 to be constructed in the step b, so that the starting points of the four engineering lines in the step c are staggered, the simultaneous construction of two construction lines in the same direction in the same row is avoided, a basic construction unit is divided into four non-connected blocks, the situation that the waterproof layer and the safety structure of the subway frame are easily damaged when large-area construction is carried out simultaneously due to shallow soil covering depth of a station tunnel top plate is prevented, meanwhile, bidirectional modular construction is carried out, and the construction efficiency is greatly improved.
The square construction unit 111 has an area of 50 square meters and a horizontal-vertical proportion of 2: 1.
Different minimum construction areas are selected according to the thickness of the tunnel roof soil covering below the road to be constructed, and the minimum construction units with different transverse-longitudinal ratios can be selected according to different road widths.
The numerical range of M is 3, and the numerical range of L is 3.
The staggered certain safety distance of the two construction lines at the same end is ensured, and the waterproof layer and the safety structure of the subway frame are prevented from being damaged.
The above-mentioned embodiments are intended to illustrate the objects, technical solutions and advantages of the present invention in further detail, and it should be understood that the above-mentioned embodiments are merely exemplary embodiments of the present invention, and are not intended to limit the scope of the present invention, and any modifications, equivalent substitutions, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (7)
1. A construction method for backfilling sand and gravel above a subway station is characterized by comprising the following steps:
a. removing surface vegetation on the upper surface of the square road section to be constructed;
b. dividing a square road section (1) to be constructed into a plurality of square construction units (111) distributed in a matrix of two rows and N columns;
c. paving sand and gravel by taking two opposite angles of the square road section as starting points and simultaneously along M square construction units (111) on the same row in the central axis direction of the long side of the square road section (1) to form a first reference road surface (11) positioned at the upper diagonal of the square road section (1) and a second reference road surface (12) positioned at the lower diagonal of the square road section (1);
d. the method comprises the steps of taking a square construction unit (111) positioned in a first row and a first column below a first reference pavement (11) as a first starting point, taking a square construction unit (111) positioned in an M +1 th row and the same row as the first reference pavement (11) as a second starting point, taking a square construction unit (111) positioned in an Nth row and a second row and the same row as a second reference pavement (12) as a third starting point, taking a square construction unit (111) positioned in an N-M th row and the same row as the second reference pavement (12) as a fourth starting point, taking the first starting point, the second starting point, the third starting point and the fourth starting point as construction starting points, taking the square construction unit (111) as a minimum construction unit area, dividing into four construction lines, and paving sand and gravel synchronously and at the same speed along the central axis direction of the long side of a square road section (1);
e. when L square construction units (111) to be constructed are arranged between the square construction units (111) with the sand gravel laid at the two ends of the same row at intervals, two construction lines with the same construction direction are stopped, and the remaining two construction lines are kept in construction until the sand gravel is laid on the whole square road section (1).
2. The construction method for backfilling sand and gravel above the subway station according to claim 1, wherein the square construction unit (111) has an area of 50 square meters to 80 square meters and a horizontal-vertical ratio of 1:1 to 2: 1.
3. The construction method for backfilling sand and gravel above a subway station according to claim 1, wherein M is 3-6 and L is 2-5.
4. The construction method for backfilling sand and gravel above a subway station according to claim 1, wherein said laying sand and gravel comprises the following steps:
A. the distance from the layer-by-layer downward excavation to the top of the ground iron tunnel frame body is 50 cm-80 cm;
B. and (3) rolling the undisturbed soil, backfilling and rolling sand gravel layer by layer, and excavating a next square construction unit (111).
5. The construction method for backfilling sand and gravel above a subway station as claimed in claim 4, wherein each thickness of said layer excavated downwards in step A is not more than 0.5 m.
6. The construction method for backfilling sand and gravel above a subway station according to claim 4, wherein in step A and step B, a measuring device is used for monitoring deformation quantity of excavation depth and overall profile of a square construction unit (111) in real time while layered downward excavation and upward backfilling are carried out.
7. The construction method for backfilling sand and gravel above a subway station according to claim 4, wherein the backfilling height of each layer in the step B, which is backfilled layer by layer, is 0.3-0.4 m.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010372119.7A CN111576492B (en) | 2020-05-06 | 2020-05-06 | Construction method for backfilling sand gravel above subway station |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010372119.7A CN111576492B (en) | 2020-05-06 | 2020-05-06 | Construction method for backfilling sand gravel above subway station |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3109723A1 (en) * | 1981-03-13 | 1982-09-23 | Rudolf N. 8034 Germering Aumiller | Method for the rapid laying of concrete paving units |
| CN103046955A (en) * | 2012-12-24 | 2013-04-17 | 河北钢铁集团矿业有限公司 | Large-range goaf group filling method |
| CN103967050A (en) * | 2014-01-29 | 2014-08-06 | 广州机施建设集团有限公司 | Construction system of subway station |
-
2020
- 2020-05-06 CN CN202010372119.7A patent/CN111576492B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3109723A1 (en) * | 1981-03-13 | 1982-09-23 | Rudolf N. 8034 Germering Aumiller | Method for the rapid laying of concrete paving units |
| CN103046955A (en) * | 2012-12-24 | 2013-04-17 | 河北钢铁集团矿业有限公司 | Large-range goaf group filling method |
| CN103967050A (en) * | 2014-01-29 | 2014-08-06 | 广州机施建设集团有限公司 | Construction system of subway station |
Non-Patent Citations (2)
| Title |
|---|
| 周厚贵等: "《海岛开发成陆工程技术》", 31 January 2015 * |
| 王芳等: "盾构隧道结合洞桩法修建地铁车站地表沉降控制标准分析", 《岩土力学》 * |
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