CN108360555A - A kind of the ground anchor structure formula cantilever barrier wall structure and its stability calculation method of railway sunk type station - Google Patents
A kind of the ground anchor structure formula cantilever barrier wall structure and its stability calculation method of railway sunk type station Download PDFInfo
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- CN108360555A CN108360555A CN201810099084.7A CN201810099084A CN108360555A CN 108360555 A CN108360555 A CN 108360555A CN 201810099084 A CN201810099084 A CN 201810099084A CN 108360555 A CN108360555 A CN 108360555A
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- barricade
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- 230000004888 barrier function Effects 0.000 title claims abstract description 22
- 238000004364 calculation method Methods 0.000 title claims abstract description 17
- 238000000034 method Methods 0.000 claims abstract description 8
- 238000005266 casting Methods 0.000 claims abstract description 4
- 230000003014 reinforcing effect Effects 0.000 claims description 13
- 239000003224 coccidiostatic agent Substances 0.000 claims description 12
- 238000010008 shearing Methods 0.000 claims description 11
- 239000002689 soil Substances 0.000 claims description 10
- 238000013461 design Methods 0.000 claims description 9
- 238000004873 anchoring Methods 0.000 claims description 4
- 229910000831 Steel Inorganic materials 0.000 claims description 2
- 238000007596 consolidation process Methods 0.000 claims description 2
- 230000002787 reinforcement Effects 0.000 claims description 2
- 239000010959 steel Substances 0.000 claims description 2
- 238000010276 construction Methods 0.000 description 3
- 238000013459 approach Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D29/00—Independent underground or underwater structures; Retaining walls
- E02D29/02—Retaining or protecting walls
- E02D29/0225—Retaining or protecting walls comprising retention means in the backfill
- E02D29/0233—Retaining or protecting walls comprising retention means in the backfill the retention means being anchors
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
- E02D5/74—Means for anchoring structural elements or bulkheads
- E02D5/80—Ground anchors
Abstract
A kind of the ground anchor structure formula cantilever barrier wall structure and its stability calculation meter method of railway sunk type station, to effectively improve the anti-slide performance and resistance to capsizing of cantilever barricade, cantilever barricade bottom plate is avoided to generate interference with platform canopy column or other station structure bases, it is ensured that station engineering safety is reliable.It include the cantilever barricade that setting is longitudinally continuous along circuit, the cantilever barricade made of concrete one-piece casting includes wall, heel slab and toe board in structure, the surfaces ground D are wherein embedded to hereinafter, the foundation structure of station structures is located in the ground on rear side of wall by the bottom plate that heel slab and toe board are constituted.Along the longitudinally spaced laying ground anchor structure of circuit in the heel slab and ground below, along the longitudinally spaced setting antiskid key of circuit, each antiskid key is extended downwardly by toe board bottom surface for the front of the toe board.
Description
Technical field
The present invention relates to geotechnical engineering, more particularly to the ground anchor structure formula cantilever barrier wall structure of a kind of railway sunk type station
And its stability calculation meter method.
Technical background
Cantilever barricade is obtained since its light-duty, upright beautiful and closing slope effect is good in railway sunk type station engineering
A large amount of application.But sunk type station cantilever barricade bottom plate often generates with platform canopy column or other station structure bases dry
It disturbs, leads to that easily cantilever barricade need to be caused larger peace in barricade bottom plate trepanning, these trepannings when structure base is arranged
Full hidden danger.Therefore, there is an urgent need for a kind of improved cantilever barrier wall structures of proposition and design method to solve above-mentioned problem, meet under railway
Heavy formula station closing slope requirement, and the features such as ensure safe and reliable structure, easy for construction, investment reduction.
Invention content
Technical problem to be solved by the invention is to provide a kind of ground anchor structure formula cantilever barricades of railway sunk type station
Structure, to effectively improve the anti-slide performance and resistance to capsizing of cantilever barricade, avoid cantilever barricade bottom plate and platform canopy column or
Other station structure bases generate interference, it is ensured that station engineering safety is reliable.
The technical solution that the present invention solves used by above-mentioned technical problem is as follows：
A kind of ground anchor structure formula cantilever barrier wall structure of railway sunk type station of the present invention, including be longitudinally continuous along circuit
The cantilever barricade of setting, the cantilever barricade made of concrete one-piece casting in structure include wall, heel slab and toe board, wherein
The surfaces ground D are embedded to hereinafter, the foundation structure of station structures is located at the ground on rear side of wall by the bottom plate that heel slab and toe board are constituted
In base, it is characterized in that：In the heel slab and ground below before the longitudinally spaced laying ground anchor structure of circuit, the toe board
Portion is extended downwardly along the longitudinally spaced setting antiskid key of circuit, each antiskid key by toe board bottom surface.
Another technical problem to be solved by this invention is to provide a kind of ground anchor structure formula of above-mentioned railway sunk type station
The stability calculation method of cantilever barrier wall structure, this approach includes the following steps：
1. according to railway bed retaining structure design specification, cantilever barricade minimum anti-sliding stability coefficient [K is determinedc] and it is minimum
Anti-coccidia index [K0]；
2. with cantilever barricade anti-sliding stability coefficient Kc≥[Kc] and anti-coccidia index K0≥[K0] target in order to control, lead to
Cross the anti-sliding stability coefficient K that following formula calculates cantilever barricadecAnd anti-coccidia index K0：
In formula, KcFor barricade anti-sliding stability coefficient, no unit；∑ N is the total vertical force acted on bottom plate, unit kN；f
For the friction coefficient of bottom plate and foundation soil, no unit；E'xFor the horizontal component of soil pressure before barricade wall, unit kN；∑ExFor gear
The total level component of active earth pressure, unit kN after wall wall；∑FxThe shearing resistance of component, unit kN are drawn for anchor；∑FyStructure is drawn for anchor
The anchor pulling force of part, unit kN；eNFor the eccentricity of ∑ N, unit m；eFFor the eccentricity of ∑ N, unit m；exFor ∑ ExBias
Away from unit m；ex'For E'xEccentricity, unit m；
3. according to the result of calculation of the step 2. coefficient of stability, in conjunction with Kc≥[Kc] and K0≥[K0] control condition, definitely
Anchor structure formula cantilever barricade size.
The invention has the advantages that adding ground anchor structure and antiskid key on traditional cantilever barrier wall structure, not only give outstanding
Arm barricade provides skid resistance, and ground anchor structure also provides a downward anchor pulling force for cantilever barricade, so that it is guaranteed that outstanding
Arm-type barricade antiskid and resistance to capsizing, and reduce heel slab length and structure size, it is outstanding to efficiently solve railway sunk type station
Arm barricade and awning basis or the interference problem of station structure base, it is ensured that station engineering safety is reliable；It has expanded significantly outstanding
The application range of arm barricade, meets the requirement of railway sunk type station closing slope, and structure has safe and reliable, easy for construction, saving
The features such as investment.
Description of the drawings
Fig. 1 is a kind of cross-sectional view of the ground anchor structure formula cantilever barrier wall structure of railway sunk type station of the present invention；
Fig. 2 is a kind of ground anchor structure formula cantilever barrier wall structure floor plan of railway sunk type station of the present invention.
The title of main member and corresponding label are shown in figure：Wall 11, heel slab 12, toe board 13, antiskid key 14, anchor
Draw component 20, preburied component 30, station structures A, foundation structure B, ground D.
Specific implementation mode
It is further illustrated the present invention below by specific embodiment and in conjunction with attached drawing.
Referring to Figures 1 and 2, the ground anchor structure formula cantilever barrier wall structure of a kind of railway sunk type station of the invention, including
The cantilever barricade of setting is longitudinally continuous along circuit, the cantilever barricade made of concrete one-piece casting includes wall in structure
11, heel slab 12 and toe board 13, wherein being embedded to the surfaces ground D or less by the bottom plate that heel slab 12 and toe board 13 are constituted.Station structures A
Foundation structure B be located in the ground D of the rear side of wall 11.It is longitudinally spaced along circuit in the heel slab 12 and ground D below
Lay ground anchor structure.The front of the toe board 13 is along the longitudinally spaced setting antiskid key 14 of circuit, and each antiskid key 14 is by 13 bottom of toe board
Extend downwards.Ground anchor structure and antiskid key 14 are added on traditional cantilever barrier wall structure, is not only provided to cantilever barricade anti-
Sliding power, and ground anchor structure also provides a downward anchor pulling force for cantilever barricade, so that it is guaranteed that Cantilever Retaining Wall antiskid and
Resistance to capsizing, and reduce the length and structure size of heel slab 13, efficiently solve railway sunk type station cantilever barricade and rain
The interference problem of canopy basis or station structure base, it is ensured that station engineering safety is reliable.Answering for cantilever barricade has been expanded significantly
With range, the requirement of railway sunk type station closing slope is met, structure has the characteristics that safe and reliable, easy for construction, investment reduction.
Referring to Figures 1 and 2, the ground anchor structure draws component 20 and pre-buried structure by the anchor being arranged along circuit longitudinal direction equidistant interval
Part 30 is constituted, and the composition of preburied component 30 is embedded in heel slab 12 and consolidation is integrated therewith, and anchor draws component 20 to be set to ground D
It is interior, the upper end and 30 anchor connection of preburied component.
The preburied component 30 is using steel plate or the reinforcing bar of a diameter of 20~28mm, with 12 main reinforcement stagger setting of heel slab.
The anchor draws component 20 to use anchor cable or anchor pole, its underpart and the supporting course anchor connection of the lower parts ground D.Anchor cable beam number, anchor pole are straight
Diameter and spacing should be determined by the antiskid of cantilever barricade and antidumping stability Calculation
A kind of stability calculation method of the ground anchor structure formula cantilever barrier wall structure of railway sunk type station of the present invention, including
Following steps：
1. according to railway bed retaining structure design specification, cantilever barricade minimum anti-sliding stability coefficient [K is determinedc] and it is minimum
Anti-coccidia index [K0]；
2. with cantilever barricade anti-sliding stability coefficient Kc≥[Kc] and anti-coccidia index K0≥[K0] target in order to control, lead to
Cross the anti-sliding stability coefficient K that following formula calculates cantilever barricadecAnd anti-coccidia index K0：
In formula, KcFor barricade anti-sliding stability coefficient, no unit；∑ N is the total vertical force acted on bottom plate, unit kN；f
For the friction coefficient of bottom plate and foundation soil, no unit；E'xFor the horizontal component of soil pressure before barricade wall, unit kN；∑ExFor gear
The total level component of active earth pressure, unit kN after wall wall；∑FxThe shearing resistance of component, unit kN are drawn for anchor；∑FyStructure is drawn for anchor
The anchor pulling force of part, unit kN；eNFor the eccentricity of ∑ N, unit m；eFFor the eccentricity of ∑ N, unit m；exFor ∑ ExBias
Away from unit m；ex'For E'xEccentricity, unit m；
3. according to the result of calculation of the step 2. coefficient of stability, in conjunction with Kc≥[Kc] and K0≥[K0] control condition, definitely
Anchor structure formula cantilever barricade size.
The step 1. in cantilever barricade minimum anti-sliding stability coefficient [Kc]=1.3, minimum anti-coccidia index [K0]
=1.6.
The step 2. in ∑ FxThe shearing resistance that component is drawn for anchor is reinforcing bar as anchor draws component, is then the shearing resistance of reinforcing bar
Strength failure criterion；It is anchor cable as anchor draws component, then does not consider its shearing resistance.
The step 2. in ∑ FyThe anchor pulling force that component is drawn for anchor is reinforcing bar as anchor draws component, is then the tension of reinforcing bar
The minimum value of the cohesive force three of strength failure criterion, the cohesive force of reinforcing bar and anchoring body and anchoring body and the soil body；Such as it is anchor cable, then
For the stretching force design value of anchor cable.
Embodiment：
Referring to Fig.1, southern Shandong high ferro sunk type station presses the preliminary project a height of 9m of cantilever barricade, and wall is thick with bottom plate
Degree is 0.7m, the wide 1m of heel slab, the wide 2.5m of toe board, and antiskid key edge is 0.5m far from toe board edge, and antiskid key size is wide × high=
The equivalent friction angle of 0.25m × 0.25m, rolling earth behind retaining wall are 30 °, Basement surge f=0.3, wall top additional load Q=
30kPa.Anchor draws the ground anchor structure of component using the HRB400 reinforcing bars of long 6m, diameter 20mm, and ground anchor structure is away from toe of wall distance
3.4m, anchor draw the longitudinal pitch 1.5m of component.Anchor draws component that can provide shearing resistance ∑ Fx=50kN/m, anchor pulling force ∑ Fy=82kN/
m.Below according to method provided by the present invention, the ground anchor structure formula cantilever barrier wall structure of above-mentioned railway sunk type station is carried out
Stability calculation includes the following steps：
1. according to railway bed retaining structure design specification, cantilever barricade minimum anti-sliding stability coefficient [K is determinedc]=1.3
And minimum anti-coccidia index [K0]=1.6, and with cantilever barricade anti-sliding stability coefficient Kc≥[Kc], anti-coccidia index
K0≥[K0] it is used as stability calculation target；
2. and determining the anti-sliding stability coefficient K of cantilever barricade by following formulacAnd anti-coccidia index K0：
In formula, ∑ N is the total vertical force acted on bottom plate, unit kN；F is the friction coefficient of bottom plate and foundation soil；E'x
For the horizontal component of soil pressure before barricade wall, unit kN；∑ExFor the total level component of active earth pressure after barricade wall, unit
kN；∑FxThe shearing resistance of component, unit kN are drawn for anchor；∑FyThe anchor pulling force of component, unit kN are drawn for anchor；eNFor the bias of ∑ N
Away from unit m；eFFor the eccentricity of ∑ N, unit m；exFor ∑ ExEccentricity, unit m；ex'For E'xEccentricity, unit m；
Substitute into formula：Kc=(495 × 0.3+228)/325=1.16, K0=1592/1179=1.35.
3. according to the result of calculation of the step 2. coefficient of stability, K is judgedcAnd K0Whether meet the inspection of step 1. and calculates target, i.e., it is anti-
Sliding coefficient of stability Kc=1.16 ＜ 1.3, antidumping COEFFICIENT K0=1.35 ＜ 1.6, structure are unsatisfactory for code requirement, reply cantilever gear
Structure size, antiskid key and the ground anchor structure of wall are redesigned and are carried out Stability Checking.
The above is only using a kind of ground anchor structure formula cantilever barricade of railway sunk type station of the diagram illustrating present invention
Some principles of structure and its stability calculation method, be not intended to by the present invention be confined to shown in and the concrete structure and
In the scope of application, therefore every corresponding modification for being possible to be utilized and equivalent, belong to the apllied patent of the present invention
Range.
Claims (8)
1. a kind of ground anchor structure formula cantilever barrier wall structure of railway sunk type station, includes the cantilever for being longitudinally continuous setting along circuit
Barricade, the cantilever barricade made of concrete one-piece casting in structure include wall (11), heel slab (12) and toe board (13),
In the bottom plate embedment ground surface (D) that is made of heel slab (12) and toe board (13) hereinafter, station structures (A) foundation structure
(B) it is located in the ground (D) on rear side of wall (11), it is characterized in that：Along circuit in the heel slab (12) and ground (D) below
Longitudinally spaced laying ground anchor structure, the front of the toe board (13) is along the longitudinally spaced setting antiskid key (14) of circuit, each antiskid key
(14) it is extended downwardly by toe board (13) bottom surface.
2. a kind of ground anchor structure formula cantilever barrier wall structure of railway sunk type station as described in claim 1, it is characterized in that：Institute
State ground anchor structure draws component (20) and preburied component (30) to constitute by the anchor being arranged along circuit longitudinal direction equidistant interval, preburied component
(30) constitute and be embedded in heel slab (12) and consolidation is integrated therewith, anchor draws component (20) to be set in ground (D), the upper end with
Preburied component (30) anchor connection.
3. a kind of ground anchor structure formula cantilever barrier wall structure of railway sunk type station as claimed in claim 2, it is characterized in that：Institute
It is steel plate or the reinforcing bar of a diameter of 20~28mm to state preburied component (30), with heel slab (12) main reinforcement stagger setting.
4. a kind of ground anchor structure formula cantilever barrier wall structure of railway sunk type station as claimed in claim 2, it is characterized in that：Institute
Stating anchor draws component (20) for anchor cable or anchor pole, its underpart and ground (D) lower part supporting course anchor connection.
5. a kind of ground anchor structure formula cantilever barrier wall structure of railway sunk type station as described in Claims 1-4 any one
Stability calculation method, includes the following steps：
1. according to railway bed retaining structure design specification, cantilever barricade minimum anti-sliding stability coefficient [K is determinedc] and minimum anti-incline
Cover the coefficient of stability [K0]；
2. with cantilever barricade anti-sliding stability coefficient Kc≥[Kc] and anti-coccidia index K0≥[K0] target in order to control, by following
Formula calculates the anti-sliding stability coefficient K of cantilever barricadecAnd anti-coccidia index K0：
In formula, KcFor barricade anti-sliding stability coefficient, no unit；∑ N is the total vertical force acted on bottom plate, unit kN；F is bottom
The friction coefficient of plate and foundation soil, no unit；E'xFor the horizontal component of soil pressure before barricade wall, unit kN；∑ExFor barricade wall
The total level component of active earth pressure afterwards, unit kN；∑FxThe shearing resistance of component, unit kN are drawn for anchor；∑FyComponent is drawn for anchor
Anchor pulling force, unit kN；eNFor the eccentricity of ∑ N, unit m；eFFor the eccentricity of ∑ N, unit m；exFor ∑ ExEccentricity, it is single
Position m；ex'For E'xEccentricity, unit m；
3. according to the result of calculation of the step 2. coefficient of stability, in conjunction with Kc≥[Kc] and K0≥[K0] control condition, determine earth anchor knot
Structure formula cantilever barricade size.
6. a kind of stability calculation of the ground anchor structure formula cantilever barrier wall structure of railway sunk type station as claimed in claim 5
Method, it is characterized in that：The step 1. in cantilever barricade minimum anti-sliding stability coefficient [Kc]=1.3, minimum antidumping are stablized
Coefficient [K0]=1.6.
7. a kind of stability calculation of the ground anchor structure formula cantilever barrier wall structure of railway sunk type station as claimed in claim 5
Method, it is characterized in that：The step 2. in ∑ FxFor the shearing resistance of anchor structure, it is reinforcing bar as anchor draws component, is then reinforcing bar
Shearing strength design value；It is anchor cable as anchor draws component, then does not consider its shearing resistance.
8. a kind of stability calculation of the ground anchor structure formula cantilever barrier wall structure of railway sunk type station as claimed in claim 5
Method, it is characterized in that：The step 2. in ∑ FyThe anchor pulling force that component is drawn for anchor is reinforcing bar as anchor draws component, is then reinforcing bar
Tensile strength design value, the cohesive force of reinforcing bar and anchoring body and anchoring body and the soil body cohesive force three minimum value；Such as it is
Anchor cable is then the stretching force design value of anchor cable.
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|---|---|---|---|
| CN201810099084.7A CN108360555A (en) | 2018-01-31 | 2018-01-31 | A kind of the ground anchor structure formula cantilever barrier wall structure and its stability calculation method of railway sunk type station |
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| CN201810099084.7A CN108360555A (en) | 2018-01-31 | 2018-01-31 | A kind of the ground anchor structure formula cantilever barrier wall structure and its stability calculation method of railway sunk type station |
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Cited By (2)
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| CN111291492A (en) * | 2020-02-20 | 2020-06-16 | 中铁二院工程集团有限责任公司 | Method for improving anti-skid and anti-overturning safety of existing weight-balance retaining wall |
| CN111400894A (en) * | 2020-03-12 | 2020-07-10 | 中铁二院工程集团有限责任公司 | Concrete pile composite foundation stability calculation method |
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Application publication date: 20180803 |