CN110144767B - Side-width roadbed structure and construction method - Google Patents
Side-width roadbed structure and construction method Download PDFInfo
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- CN110144767B CN110144767B CN201910267776.2A CN201910267776A CN110144767B CN 110144767 B CN110144767 B CN 110144767B CN 201910267776 A CN201910267776 A CN 201910267776A CN 110144767 B CN110144767 B CN 110144767B
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- 238000010276 construction Methods 0.000 title claims abstract description 22
- 238000004873 anchoring Methods 0.000 claims abstract description 42
- 229910000831 Steel Inorganic materials 0.000 claims description 26
- 239000010959 steel Substances 0.000 claims description 26
- 238000005259 measurement Methods 0.000 claims description 19
- 241000209094 Oryza Species 0.000 claims description 11
- 235000007164 Oryza sativa Nutrition 0.000 claims description 11
- 239000000463 material Substances 0.000 claims description 11
- 235000009566 rice Nutrition 0.000 claims description 11
- 230000003014 reinforcing effect Effects 0.000 claims description 8
- 239000002689 soil Substances 0.000 claims description 8
- 238000005429 filling process Methods 0.000 claims description 3
- 238000000034 method Methods 0.000 abstract description 5
- 230000002787 reinforcement Effects 0.000 description 6
- 230000000903 blocking effect Effects 0.000 description 3
- 238000006073 displacement reaction Methods 0.000 description 3
- 239000004743 Polypropylene Substances 0.000 description 2
- XECAHXYUAAWDEL-UHFFFAOYSA-N acrylonitrile butadiene styrene Chemical compound C=CC=C.C=CC#N.C=CC1=CC=CC=C1 XECAHXYUAAWDEL-UHFFFAOYSA-N 0.000 description 2
- 239000004676 acrylonitrile butadiene styrene Substances 0.000 description 2
- 229920000122 acrylonitrile butadiene styrene Polymers 0.000 description 2
- 239000004567 concrete Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000000945 filler Substances 0.000 description 2
- 239000004417 polycarbonate Substances 0.000 description 2
- 239000004800 polyvinyl chloride Substances 0.000 description 2
- 229920000915 polyvinyl chloride Polymers 0.000 description 2
- 230000009466 transformation Effects 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 238000009530 blood pressure measurement Methods 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 239000010881 fly ash Substances 0.000 description 1
- 239000011381 foam concrete Substances 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 229920000515 polycarbonate Polymers 0.000 description 1
- -1 polypropylene Polymers 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 239000011150 reinforced concrete Substances 0.000 description 1
- 238000004062 sedimentation Methods 0.000 description 1
Classifications
-
- 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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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Devices Affording Protection Of Roads Or Walls For Sound Insulation (AREA)
- Pit Excavations, Shoring, Fill Or Stabilisation Of Slopes (AREA)
Abstract
The invention discloses a side-width roadbed structure and a construction method, wherein the side-width roadbed structure comprises a bearing platform, an inclined plate, a supporting structure, a pressure gauge and an anchoring structure, wherein the bearing platform is adjacent to the slope foot of a business line embankment, the anchoring structure is used for reducing deformation of the inclined plate to the slope surface of the business line embankment, and the inclined plate is rigidly connected to the bearing platform in an upward inclined manner towards the slope surface direction of the business line embankment; the support structure is rigidly connected to the bearing platform and is arranged opposite to the sloping plate; two ends of the anchoring structure are respectively arranged on the sloping plate and the supporting structure; the pressure gauge is positioned between the sloping plate and the slope of the business line embankment. The pressure gauge and the anchoring structure cooperate to monitor the influence on the business line in the construction process of the upper wide roadbed structure, dynamically adjust the internal force of the upper wide roadbed structure and control and basically eliminate the influence on the business line.
Description
Technical Field
The invention relates to a road or railway building, in particular to a wide roadbed structure and a construction method.
Background
With the completion of a high-speed railway, particularly a high-speed railway, a line expansion transformation, a new line introduction, a secondary line establishment and the like are inevitably required to be designed and constructed in the range of an adjacent business line. The business line has strict requirements on smoothness of the line, the high-speed railway has very high requirements on deformation control, and how to construct wide roadbed adjacent to the business line while ensuring normal and safe operation of the business line is still a main subject of engineering community. If in soft soil area, when the wide road bed strand is close to business line strand, the load of the wide road bed body and the newly added rail train will directly act on the bank slope of business line, causing additional deformation of the business line road bed body and the foundation, exceeding the control standard of business line safety management and even endangering the operation safety of business line. Therefore, the influence of the wide roadbed on the business line should be fully considered in the design and construction of the adjacent business line, and the stability and sedimentation control are well performed.
At present, roadbed structures adjacent to business lines have a great influence on side slopes of the business lines, and potential safety hazards exist for operation of the business lines.
Disclosure of Invention
In order to solve the technical problems, the embodiment of the invention provides a side-width roadbed structure and a construction method.
In order to achieve the above purpose, the technical scheme of the invention is realized as follows:
The embodiment of the invention provides a side-width roadbed structure, which comprises a bearing platform, an inclined plate, a supporting structure, a pressure gauge and an anchoring structure, wherein the bearing platform is adjacent to the slope foot of a business line embankment; the support structure is rigidly connected to the bearing platform and is arranged opposite to the sloping plate; two ends of the anchoring structure are respectively arranged on the sloping plate and the supporting structure; the pressure gauge is positioned between the sloping plate and the slope of the business line embankment.
In the scheme, the side-width roadbed structure further comprises reinforcing piles extending into the foundation, and the reinforcing piles are rigidly connected below the bearing platform.
In the above scheme, the support structure is a panel;
or the supporting structure is a supporting column;
Or the supporting structure comprises at least two supporting columns and a soil retaining plate for connecting the adjacent two supporting columns, and the anchoring structure is arranged on the supporting columns;
or the support structure comprises a panel and a buttress connected with the panel, and the anchoring structure is mounted on the panel or/and the buttress.
In the above scheme, the anchoring structure comprises steel strands, and two ends of each steel strand are anchored on the sloping plate and the supporting structure respectively; the steel strand wires are a plurality of, and a plurality of steel strand wires layering sets up.
In the scheme, the pressure gauge is positioned between the two steel strands in the transverse direction or/and the longitudinal direction.
In the above scheme, the anchoring structure further comprises a sleeve sleeved outside the steel strand, and the sleeve corresponds to the steel strand one by one.
In the above scheme, the height of the sloping plate or the supporting structure is calculated by the following formula:
H＝(X+B/2.0+Ytanθ)/(m+tanθ)
wherein, H is the height of the sloping plate or the supporting structure, and the unit is: rice; x is the horizontal distance between the slope toe point of the business line embankment and the central line of the line width of the slope, and the unit is: rice; taking a positive value when the upper wide line load center is in the slope of the business line embankment, or taking a negative value; y is the difference between the slope foot point of the business line embankment and the elevation of the line shoulder with the width, and the unit is: rice; b is the load distribution width of the upper wide line, and the unit is: rice; θ is the load spread angle of the upper-width line, unit: radian; m is the slope coefficient of the slope of the business line embankment, and when multi-line load is distributed on the wide line, the line nearest to the business line is selected to calculate and determine the height H.
In the scheme, the slope rate of the sloping plate is larger than or equal to the slope rate of the slope surface of the business line embankment.
In the above scheme, the pressure gauge is arranged on one side of the sloping plate facing the slope of the business line embankment, or is buried in the slope of the business line embankment.
The embodiment of the invention also provides a construction method, which comprises the following steps:
s10, constructing and forming any side-width roadbed structure;
s20, adjusting the prestress of the anchoring structure to enable the measurement result of the pressure gauge to be zero;
S30, filling roadbed materials above the bearing platform, and enabling the measurement result of the pressure gauge to meet a preset measurement value in the filling process;
and S40, tensioning the anchoring structure to a design load after filling.
In the above solution, the step S30 includes: and when the filling height is increased by a preset height, adjusting the prestress of the anchoring structure according to the measurement result of the pressure gauge, so that the measurement result of the pressure gauge meets the preset measurement value.
The invention provides a wide roadbed structure and a construction method, wherein the wide roadbed structure is designed and constructed adjacent to business lines, and a bearing platform is used for bearing roadbed materials filled on the bearing platform and new line loads. The anchoring structure and the supporting structure are both positioned on the outer side of the slope surface of the business line embankment, and the inclined plate is designed in an inclined manner, so that newly filled roadbed materials and new line loads are reduced by the aid of the wide roadbed structure and transferred to the business line embankment and the corresponding foundation. In the construction process, the anchoring structure can control the deformation of the inclined plate, and the influence of the side-width roadbed structure and the new line load on business lines is reduced. The cooperation of the pressure gauge and the anchoring structure can monitor the effect of the transmission to the business line through the slope in the construction process, and further control and basically eliminate the influence on the business line.
Drawings
FIG. 1 is a schematic view of an alternative structure of a wide roadbed structure according to an embodiment of the present invention;
FIG. 2 is a schematic cross-sectional plan view of a wide subgrade structure and business lines according to an embodiment of the present invention.
Reference numerals: a wide roadbed structure 100; a base 110; a swash plate 120; a support structure 130; support columns 131; a soil blocking plate 132; an anchor structure 140; a pressure gauge 150; reinforcing piles 160; a roadbed material 170; business line 200; business circuit bed 210; business line bank slope 211; business line foundation reinforcement area 220.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention more clear, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. It will be apparent that the described embodiments are some, but not all, embodiments of the invention. All other embodiments obtained by a person skilled in the art based on the described embodiments of the invention fall within the scope of protection of the invention.
In the description of the present invention, it is to be understood that the terms "longitudinal", "transverse", "horizontal", "vertical", "bottom", "inner", "outer", etc. indicate an orientation or positional relationship based on the orientation or positional relationship shown in fig. 1, wherein the horizontal direction is parallel to the transverse direction. "plurality" means two or more.
The embodiment of the invention provides a wide roadbed structure, wherein the wide roadbed structure 100 comprises a bearing platform 110, an inclined plate 120, a pressure gauge 150 and an anchoring structure 140, wherein the bearing platform 110 is adjacent to the slope foot of a embankment of a business line 200, the anchoring structure 140 is used for reducing deformation of the inclined plate 120 to the slope 211 of the embankment of the business line, and the inclined plate 120 is rigidly connected to the bearing platform 110 in an upward inclined manner towards the slope 211 of the embankment of the business line 200; the supporting structure 130 is rigidly connected to the bearing platform 110 and is arranged opposite to the sloping plate 120; two ends of the anchoring structure 140 are respectively mounted on the swash plate 120 and the support structure 130; the manometer 150 is located between the inclined plate 120 and the bank slope 211 of the business circuit.
As shown in fig. 2, in each dotted line on the roadbed in fig. 2, a represents the central line of the upper line, and b represents the central line of the business line; below the subgrade of the business line 200 is a business line foundation reinforcement area 220, two sides of the embankment of the business line 200 are business line embankment slopes 211, and the wide subgrade structure 100 is arranged outside the business line embankment slopes 211. The single side edge width may be performed on one side of the business line 200, or the double side edge widths may be performed on both sides of the business line 200 as shown in fig. 2; the wider line on each side can be distributed with multi-line load, i.e. a plurality of wider line centers a. The platform 110 is adjacent to the bank toe of the business line 200, and the platform 110 may be a frame type or a plate type, and fig. 1 and 2 exemplarily show the plate type platform 110 horizontally arranged. A newly filled subgrade material 170 is positioned over the cap 110. The sloping plate 120 is rigidly connected to the platform 110 and extends upwardly from the foot point of the business line 200 along the bank slope 211 of the business line.
Preferably, the slope rate of the sloping plate 120 is equal to or greater than the slope rate of the business road bank slope surface 211, so that the sloping plate 120 does not load the business road 200 roadbed or the load of the sloping plate 120 to the business road 200 roadbed is within a preset range. The anchor structure 140 may further reduce or even eliminate the deformation effect of the newly added load on the bank slope 211 of the business line through the sloping plate 120 during construction.
Specifically, the deformation of the sloping plate 120 can be reduced or even eliminated by adjusting the prestress of the anchoring structure 140, so as to reduce or even eliminate the influence of the side-width roadbed structure 100 on the roadbed of the business line 200, particularly on the business line embankment slope 211. The anchoring structure 140 may be a prestressed anchoring structure or a pull-anchored supporting structure, which are well known to those skilled in the art. The pressure gauge 150 can further monitor the influence of the wider roadbed structure 100 on the business line 200, and ensure that the deformation of the business line 200 is within a controllable range.
As shown in fig. 1, in some embodiments of the present invention, the wide roadbed structure 100 further includes reinforcement piles 160 extending into the foundation, and the reinforcement piles 160 are rigidly connected below the pile caps 110. The newly filled roadbed material and the newly added load are transferred to the reinforcing piles 160 through the cap 110 to further improve the stability of the wide roadbed structure 100. The reinforcement piles 160 extend into the foundation below the wide roadbed and are used for improving the bearing capacity of the natural foundation, avoiding lateral extrusion of the newly built wide roadbed to the business line 200 and improving the stability of the wide roadbed. The reinforced pile 160 can be selected from a cast-in-place pile, a plain concrete pile, a CFG (cement fly ash gravel) pile and the like according to foundation conditions, bearing capacity and other factors, and the direction of the reinforced pile 160 can be downward along the vertical direction or can be designed to form an included angle with the vertical direction according to different geological conditions.
More than two reinforcing piles 160 are arranged below each bearing platform 110, and adjacent reinforcing piles 160 are arranged at intervals. Taking a cast-in-place pile as an example, as shown in fig. 1, four cast-in-place piles downward along the vertical direction are arranged at intervals below the bearing platform 110, the four cast-in-place piles are arranged at four corners of a rectangle, and the pile diameter of each cast-in-place pile is generally 0.6-1.2 m, for example: the pile diameter is 0.6m, 0.8m, 0.9m, 1.0m and 1.2m. The pile spacing is generally 3-5 times of pile diameter, and the pile length is determined according to settlement control standard.
In some embodiments of the present invention, the anchoring structure 140 includes steel strands (not shown), both ends of which are anchored to the swash plate 120 and the support structure 130, respectively; the steel strand wires are a plurality of, and a plurality of steel strand wires layering sets up. As shown in fig. 2, four steel strands between the support structure 130 and the inclined plate 120 are arranged in two layers in the vertical direction, wherein each layer includes two oppositely arranged layers. It will be appreciated that the specific number and specific distribution locations of the steel strands may be adjusted as desired.
Further, the anchoring structure 140 further includes a sleeve (not shown) sleeved outside the steel strand, and the sleeve corresponds to the steel strand one by one. The sleeve includes, but is not limited to, PVC (Polyvinyl chloride) sleeve, PC (Polycarbonate) sleeve, PP (polypropylene) sleeve, ABS (Acrylonitrile Butadiene Styrene ) sleeve, and the like. The sleeve is sleeved outside the steel strand, the pipe diameter is 60-90 mm, and the layer spacing of each layer of sleeve is 3-6 m along the longitudinal direction. The sleeve improves the corrosion protection of the steel strand, reduces the friction loss of prestress in the tensioning process, and improves the fatigue resistance of the steel strand.
The support structure 130 is used to secure the anchoring structure 140, and the support structure 130 includes, but is not limited to, the following: first kind: the support structure 130 is a support column, for example: two support columns are vertically arranged on the bearing platform 110 at intervals, one end of a part of the anchoring structure 140 is anchored between one support column and the inclined plate 120, and the other part of the anchoring structure 140 is anchored between the other support column and the inclined plate 120. Second kind: the support structure 130 includes at least two support columns 131 and a soil blocking plate 132 connecting adjacent two support columns 131, and the anchor structure 140 is mounted on the support columns 131. The structure of the support column 131 may be the same as in the first case. As shown in fig. 1, a plurality of retaining plates 132 may be disposed between two adjacent support columns 131, and as construction proceeds, the retaining plates 132 are sequentially stacked upward in the vertical direction, the longitudinal widths of the cross sections of the support columns 131 may be 1.0 to 1.5m, the spacing is 2 to 3 times the longitudinal widths of the cross sections, the plate thickness of the retaining plates 132 may be 0.3 to 0.5m, and the plate height is preferably 0.5 m. The retaining plate 132 is used for retaining soil and collecting slopes, so that the roadbed material 170 is prevented from being wasted during filling, and the filling amount of the slope width is reduced. In such a supporting structure 130, two supporting columns 131 may be respectively located at both ends of the soil blocking plate 132. Third, the support structure 130 is a panel, i.e., the support structure 130 is designed as a unitary panel that serves both as a soil guard, a slope, and to secure the anchor structure 140. Fourth kind: the support structure 130 includes a panel and buttresses connected to the panel, and the anchor structure 140 is mounted to the panel or/and buttresses.
The deck 110 is rigidly connected to the inclined plate 120, the support structure 130 and the reinforcement piles 160. For example, reinforced concrete structures are adopted among the bearing platform 110, the inclined plates 120, the support columns 131 and the reinforced piles 160, and the concrete strength grade is not lower than C30. Preferably, the thickness of the bearing platform 110 is 0.5-1.0 m, and the transverse width meets the structural requirement and the line technical index requirement.
The pressure gauge 150 is used for measuring the pressure of the side-width roadbed structure 100 on the bank slope 211, and the pressure gauge 150 may be installed at the side of the inclined plate 120 facing the bank slope 211, or the pressure gauge 150 may be buried in the bank slope 211. The depth of the pressure gauge 150 is preferably not too deep so as not to interfere with the measurement. In general, the pressure gauge 150 is installed at an arbitrary position in the coverage area of the sloping plate 120 on the bank slope 211. However, in general, when the steel strand and the sloping plate 120 are anchored by the anchor head and prestress is applied to the steel strand to adjust the deformation amount of the sloping plate 120, the pressure change between the sloping plate 120 and the bank slope 211 at the position corresponding to the anchor head is sensitive and not stable enough. To ensure a more accurate and stable pressure measurement, it is preferable that the pressure gauge 150 is located between two strands in the transverse or/and longitudinal direction, whether the pressure gauge 150 is mounted on the swash plate 120 or in the bank slope 211.
The height of the swash plate 120 may be the same as the height of the support structure 130 in the longitudinal direction. Specifically, the height of the swash plate 120 or the support structure 130 is calculated by the following formula:
H＝(X+B/2.0+Ytanθ)/(m+tanθ)
Wherein, H is the height of the sloping plate 120 or the supporting structure 130, and X is the horizontal distance between the slope foot point of the business line embankment and the central line of the wider line, in units of: rice; taking a positive value when the upper wide line load center is in the slope of the business line embankment, or taking a negative value; y is the difference between the slope foot point of the business line embankment and the elevation of the line shoulder with the width, and the unit is: rice; b is the load distribution width of the upper wide line, and the unit is: rice; θ is the load spread angle of the upper-width line, unit: radian; m is the gradient coefficient of the slope of the business line embankment. When multi-line load is distributed on the upper wide line, the line closest to the business line is selected to calculate and determine the height H.
The embodiment of the invention also provides a construction method, which comprises the following steps:
S10, constructing and forming any one of the wide roadbed structures 100;
s20, adjusting the prestress of the anchoring structure 140 to enable the measurement result of the pressure gauge 150 to be zero;
s30, filling a roadbed material 170 above the bearing platform 110, wherein the measurement result of the pressure gauge 150 meets a preset measurement value in the filling process;
And S40, tensioning the anchoring structure to the design load after filling.
According to the construction method provided by the embodiment of the invention, the pressure gauge 150 and the anchoring structure 140 are matched to monitor the influence on the business line in the construction process of the wide roadbed, and dynamically adjust the internal force of the wide roadbed structure, so that the influence on the business line 200 is controlled and basically eliminated, the extra deformation of the wide roadbed structure 100 on the roadbed and the foundation adjacent to the business line 200 meets the control standard of the business safety management, and the safety of the business line is ensured. Particularly, the wide roadbed structure 100 and the construction method in the embodiment of the invention can meet the requirements of energy expansion transformation, new line introduction, two line establishment and the like of a high-speed railway line. For example: the settlement or the transverse displacement of the high-speed railway ballastless track subgrade and the bridge pile foundation is not more than 1mm; the change rate of horizontal displacement or vertical displacement of the ballast track railway subgrade is less than or equal to 2mm per day, or the accumulated horizontal (or vertical) change amount is less than or equal to 10mm.
The newly filled roadbed material 170 is preferably a light filler, and the light filler can be used for filling the wide roadbed, so that the dead weight of the wide roadbed and the additional stress of the wide roadbed on the foundation can be reduced, the compression deformation and the settlement deformation of the wide roadbed can be reduced, and the differential settlement between the new roadbed and the old roadbed can be controlled. For example, the newly filled roadbed material 170 is foam concrete, has a dry density of more than 800kg/m 3, and is comprehensively determined according to the structure inspection result.
Further, step S30 includes: and each time the filling height is increased by a preset height, according to the measurement result of the pressure gauge 150, the prestress of the anchoring structure 140 is adjusted so that the measurement result of the pressure gauge 150 meets the preset measurement value. The preset height may be 0.8m, 1.0m, 1.2m, etc. According to the construction method provided by the embodiment of the invention, the internal force of the structure is sequentially filled, monitored and adjusted, the construction is dynamically carried out until the filling is completed, and then the anchoring structure is stretched to the design load, so that the influence of the side-width roadbed and the newly added load on the business line is effectively eliminated.
Other structures and operations of the upper width subgrade structure 100 according to embodiments of the present invention will be understood and readily implemented by those skilled in the art, and will not be described in detail.
The foregoing description is only of the preferred embodiments of the present invention, and is not intended to limit the scope of the present invention.
Claims (10)
1. The slope width roadbed structure is characterized by comprising a bearing platform, an inclined plate, a supporting structure, a pressure gauge and an anchoring structure, wherein the bearing platform is adjacent to the slope foot of a business line embankment, the anchoring structure is used for reducing deformation of the inclined plate to the slope surface of the business line embankment, and the inclined plate is rigidly connected to the bearing platform in an upward inclined manner towards the slope surface of the business line embankment; the support structure is rigidly connected to the bearing platform and is arranged opposite to the sloping plate; two ends of the anchoring structure are respectively arranged on the sloping plate and the supporting structure; the pressure gauge is positioned between the sloping plate and the slope of the business line embankment;
The wide roadbed structure further comprises reinforcing piles extending into the foundation, and the reinforcing piles are rigidly connected below the bearing platform.
2. The wider base structure of claim 1, wherein the support structure is a panel;
or the supporting structure is a supporting column;
Or the supporting structure comprises at least two supporting columns and a soil retaining plate for connecting the adjacent two supporting columns, and the anchoring structure is arranged on the supporting columns;
or the support structure comprises a panel and a buttress connected with the panel, and the anchoring structure is mounted on the panel or/and the buttress.
3. The wide roadbed structure according to claim 1, wherein the anchoring structure comprises steel strands, and both ends of the steel strands are anchored on the sloping plate and the supporting structure respectively; the steel strand wires are a plurality of, and a plurality of steel strand wires layering sets up.
4. A wide roadbed structure according to claim 3, wherein the pressure gauge is located between two of the steel strands in the transverse or/and longitudinal direction.
5. The wider subgrade structure according to claim 3, wherein said anchoring structure further comprises sleeves sleeved outside said steel strands, said sleeves being in one-to-one correspondence with said steel strands.
6. The banked wide subgrade structure according to claim 1, wherein the height of said sloping plates or said support structure is calculated by the formula:
H＝(X+B/2.0+Ytanθ)/(m+tanθ)
wherein, H is the height of the sloping plate or the supporting structure, and the unit is: rice; x is the horizontal distance between the slope toe point of the business line embankment and the central line of the line width of the slope, and the unit is: rice; taking a positive value when the upper wide line load center is in the slope of the business line embankment, or taking a negative value; y is the difference between the slope foot point of the business line embankment and the elevation of the line shoulder with the width, and the unit is: rice; b is the load distribution width of the upper wide line, and the unit is: rice; θ is the load spread angle of the upper-width line, unit: radian; m is the slope coefficient of the slope of the business line embankment, and when multi-line load is distributed on the wide line, the line nearest to the business line is selected to calculate and determine the height H.
7. The wide roadbed structure of claim 1, wherein the slope rate of the sloping plate is greater than or equal to the slope rate of the slope of the business line embankment.
8. The wide roadbed structure according to claim 1, wherein the pressure gauge is installed at a side of the sloping plate facing the slope of the business embankment or buried in the slope of the business embankment.
9. A construction method, characterized in that the construction method comprises the steps of:
s10, constructing to form the upper width roadbed structure of any one of claims 1 to 8;
s20, adjusting the prestress of the anchoring structure to enable the measurement result of the pressure gauge to be zero;
S30, filling roadbed materials above the bearing platform, and enabling the measurement result of the pressure gauge to meet a preset measurement value in the filling process;
and S40, tensioning the anchoring structure to a design load after filling.
10. The construction method according to claim 9, wherein the step S30 includes: and when the filling height is increased by a preset height, adjusting the prestress of the anchoring structure according to the measurement result of the pressure gauge, so that the measurement result of the pressure gauge meets the preset measurement value.
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| CN201910267776.2A CN110144767B (en) | 2019-04-03 | 2019-04-03 | Side-width roadbed structure and construction method |
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| CN201910267776.2A CN110144767B (en) | 2019-04-03 | 2019-04-03 | Side-width roadbed structure and construction method |
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| CN110144767B true CN110144767B (en) | 2024-06-07 |
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| CN110761127A (en) * | 2019-12-04 | 2020-02-07 | 中铁二院工程集团有限责任公司 | Rock foundation existing high-speed railway embankment force balance side width structure and construction method |
| CN111945484B (en) * | 2020-08-06 | 2021-11-30 | 兰州交通大学 | Existing-newly-built parallel row pile plate wall retaining structure and construction method |
| CN114673040A (en) * | 2022-03-18 | 2022-06-28 | 中铁二院成都勘察设计研究院有限责任公司 | Roadbed supporting structure |
| CN114809037B (en) * | 2022-05-12 | 2024-04-26 | 江苏镇江路桥工程有限公司 | Slope protection counter-pressure embankment deformation control structure and construction method |
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