CN110453542A - A kind of transit railway soft rock heavy cut arch Deformation control structure and construction method - Google Patents
A kind of transit railway soft rock heavy cut arch Deformation control structure and construction method Download PDFInfo
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- CN110453542A CN110453542A CN201910426294.7A CN201910426294A CN110453542A CN 110453542 A CN110453542 A CN 110453542A CN 201910426294 A CN201910426294 A CN 201910426294A CN 110453542 A CN110453542 A CN 110453542A
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- 239000011435 rock Substances 0.000 title claims abstract description 83
- 238000010276 construction Methods 0.000 title claims abstract description 23
- 239000011150 reinforced concrete Substances 0.000 claims abstract description 33
- 230000003014 reinforcing effect Effects 0.000 claims abstract description 12
- 239000000758 substrate Substances 0.000 claims description 17
- 239000004567 concrete Substances 0.000 claims description 14
- 230000002787 reinforcement Effects 0.000 claims description 12
- 229910000831 Steel Inorganic materials 0.000 claims description 11
- 238000013461 design Methods 0.000 claims description 11
- 239000010959 steel Substances 0.000 claims description 11
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 11
- 239000004746 geotextile Substances 0.000 claims description 6
- 239000004576 sand Substances 0.000 claims description 6
- 239000003245 coal Substances 0.000 claims description 4
- 239000012634 fragment Substances 0.000 claims description 4
- 239000010410 layer Substances 0.000 claims description 4
- 239000004575 stone Substances 0.000 claims description 4
- 238000004140 cleaning Methods 0.000 claims description 3
- 239000000945 filler Substances 0.000 claims description 3
- 230000010412 perfusion Effects 0.000 claims description 3
- 150000001875 compounds Chemical class 0.000 claims description 2
- 239000002344 surface layer Substances 0.000 claims description 2
- 238000000034 method Methods 0.000 description 6
- 239000002689 soil Substances 0.000 description 5
- 210000003781 tooth socket Anatomy 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 238000009826 distribution Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 230000008961 swelling Effects 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000005520 cutting process Methods 0.000 description 2
- 201000010099 disease Diseases 0.000 description 2
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 2
- 230000003447 ipsilateral effect Effects 0.000 description 2
- 230000007774 longterm Effects 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 238000009412 basement excavation Methods 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
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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
- E01B1/00—Ballastway; Other means for supporting the sleepers or the track; Drainage of the ballastway
- E01B1/002—Ballastless track, e.g. concrete slab trackway, or with asphalt layers
- E01B1/005—Ballastless track, e.g. concrete slab trackway, or with asphalt layers with sleeper shoes
-
- 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)
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- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Railway Tracks (AREA)
Abstract
A kind of transit railway soft rock heavy cut arch Deformation control structure and construction method are persistently arched up deformation with effectively controlling Soft Rock Area high-speed railway heavy cut, and adjustable rock mass stress is distributed and reinforcing closes on side slope, to advantageously reduce project cost.Including constructing the ballastless track roadbed on soft rock bedding, in right side drag stake, left side drag stake is arranged along line direction interval respectively in right side slopes, left side slopes, bedding absolute altitude following certain depth is goed deep into right side drag stake, left side drag stake for the two sides of the ballastless track roadbed.The reinforced concrete radial plate symmetrical and recessed along roadbed center line is set on the top surface of soft rock bedding, and the both lateral sides of the reinforced concrete radial plate are integrated with right side drag stake, left side drag stake rigid connection respectively；Waterproof cushion is set on the reinforced concrete radial plate top surface, and ballastless track roadbed fills on the waterproof cushion.
Description
Technical field
The present invention relates to high-speed railway subgrade, especially a kind of transit railway soft rock heavy cut arch Deformation control structure and
Construction method.
Background technique
In recent years, China express railway is quickly grown, and for high-speed railway there are a large amount of soft rock heavy cuts, soft rock intensity is low, tool
There are certain dilatancy and rheological characteristic, and as engineering construction is constructed, original environmental effect changes, the various mechanical property of soft rock
The degradation phenomena of timeliness can occur, so as to cause the arch disease of high-speed railway heavy cut.High-speed railway becomes arch
Shape is extremely sensitive, and it is low that deformability is adjusted in fastener, and later period regulation is abnormal difficult, it is therefore necessary to pass through effective engineering measure
Control the arch deformation of roadbed.
Two methods are used currently, main for the arch control of soft rock heavy cut: one is excavating the rock of certain depth range
The soil body changes and fills out the preferable Rock And Soil of mechanical property, then constructing roadbed；Be for second in substrate certain depth driven pile or
Anchor cable, anchor pole, form compound foundation structure are then constructing roadbed.But the design of both methods all must be based on to substrate
The Accurate Prediction of phase arch deformation total amount is arched up rock mass depth (or perhaps Depth of Influence for Unloading) and runs, once to fundamental rock
Body arches up influence depth and arch deflection prediction fault, will face the railroad embankment phase and transfinites deformation, and the risk of reworked processing.
In view of the complexity of soft rock mechanics performance, and high-speed railway, as century-old engineering, the service time is long, can not also accomplish at present
Roadbed arch formation depth and the Accurate Prediction for runing phase arch deflection.To realize for a long time have by both methods
Effect control roadbed arch deformation, project amount will very huge and reliability it is poor.
Research according to inventor to soft rock engineering arch mechanism, the inherence for causing transit railway soft rock roadbed persistently to arch up
The reason is that the dilatancy and rheological characteristic of soft rock, i.e., after route construction disturbance, stress field and underground water in originally stable rock mass
Distribution changes, and soft rock generates expansion-rheology Coupling Deformation under new stress and water environment effect, and roadbed arch is caused to become
Shape；Meanwhile it is this deformation have significant timeliness, within a very long time railroad embankment phase all be difficult convergence and can not
Prediction.In view of currently to the deficiency of transit railway soft rock roadbed arch control, based on causing soft rock engineering persistently to arch up for a long time
Inherent mechanism, the present invention propose a kind of structure for capableing of permanently effective control soft rock engineering arch deformation, and project cost it is low,
It is easy for construction, have both to reinforce simultaneously and close on the function of side slope.
Summary of the invention
Technical problem to be solved by the invention is to provide a kind of transit railway soft rock heavy cut arch up Deformation control structure,
It is persistently arched up deformation with effectively controlling Soft Rock Area high-speed railway heavy cut, and adjustable rock mass stress distribution and reinforcing close on side
Slope, to advantageously reduce project cost.
It is as follows that the present invention solves the technical solution that above-mentioned technical problem is taken:
A kind of transit railway soft rock heavy cut arch Deformation control structure of the invention, including construct on soft rock bedding
Ballastless track roadbed, it is characterized in that: the two sides of the ballastless track roadbed in right side slopes, left side slopes respectively along route
The setting right side drag stake of direction interval, left side drag stake, bedding absolute altitude an or less depthkeeping is goed deep into right side drag stake, left side drag stake
Degree；The reinforced concrete radial plate symmetrical and recessed along roadbed center line, the armored concrete are set on the top surface of soft rock bedding
The both lateral sides of arc panel are integrated with right side drag stake, left side drag stake rigid connection respectively；The reinforced concrete radial
Waterproof cushion is set on plate top surface, and ballastless track roadbed fills on the waterproof cushion.
The both lateral sides of the reinforced concrete radial plate are in the comb teeth-shaped that extends along line direction, increment and the corresponding right side
Side drag stake, left side drag stake rigid connection；Tooth socket between adjacent two tooth is in rectangle, and length is not more than 3.0m, and not into
Enter ballastless track roadbed range.
Another technical problem to be solved by this invention is to provide a kind of above-mentioned transit railway soft rock heavy cut arch deformation
The construction method of control structure.
The construction method includes the following steps:
1. soft rock bedding of constructing, excavating cut slope side slope is mixed to apart from the soft rock bedding top surface position 2.0m absolute altitude according to reinforcing bar
Solidifying soil arc panel design size and position, by soft rock foundation surfacing at arc compatible with reinforced concrete radial board bottom face
Face；
2. drag stake of constructing, excavates downwards rectangle stake holes to stake bottom designed elevation in right side slopes, left side slopes, and
With lateral connection reinforcing bar is arranged at reinforced concrete radial plate link position, steel reinforcement cage is put into after borehole cleaning, by lateral connection reinforcing bar
It is connect with steel reinforcement cage longitudinal reinforcement, concrete perfusion, forms right side drag stake, left side drag stake；
3. construction reinforced bar concrete arc-shaped plate, builds forming panel on soft rock bedding top surface, assembling reinforcement, and in two sides
It reserves transverse steel with drag stake to connect, then primary concreting concrete, forms complete reinforced concrete radial plate, coagulation
Native intensity is not less than C30；
4. waterproof cushion is constructed, water proof geotextiles, medium-sand seam are successively laid on reinforced concrete radial plate top surface；
5. ballastless track roadbed of constructing, the placement in layers filler on waterproof cushion form ballastless track roadbed, and at it
Both lateral sides construction drainage ditch, the height that draining trench floor is located at waterproof cushion or more are typically no less than 0.5m.
The beneficial effects are mainly reflected as follows following aspects:
One, the feature that arc panel stiffness is big, resistance capacity to deformation is strong is made full use of, substrate soft rock longterm expansion is effectively controlled
The arch deformation generated with creep；
Two, using the ability of arc panel transmitting load, it is arc panel axle power by soft rock arch pressure conversion, is transmitted to two sides
Drag stake avoids road structure from generating the diseases such as deformation or cracking destruction that transfinite due to arch；
Three, arc panel is transmitted to the thrust of drag stake, acts on slope rock mass by drag stake, harmful soft rock is arched up
Pressure conversion is to be beneficial to the resistance of stability of slope, plays the role of slope retaining；
Four, the resistance that drag stake acts on slopes can effectively adjust the stress state of slopes, reduce since cutting is opened
Substrate rock mass horizontal stress caused by off-load is dug, to slow down in the vertical creep that substrate rock mass generates under horizontal stress effect
Arch deformation.
Five, the deformation generated by soft rock water swelling can be effectively shifted in the rectangle tooth socket that arc panel two sides are reserved, it will
Substrate rock mass dilatancy is transferred to unconfined rectangle tooth slot position, allows rock mass in tooth slot position bulging, it is swollen to reduce substrate
Swelling pressure power and deformation；
Six, compared with existing control measure, the present invention is without arch rock mass depth bounds (or the off-load of Accurate Prediction substrate
Coverage) and operation phase roadbed finally arch up deflection, but by control arch, the principle of shift pressure, adjustment stress,
While effectively reducing roadbed arch deformation, realizes Rock mass stress redistribution, achieve the purpose that steady in a long-term；
Seven, arch control structure is simple, and construction aspect, project cost is low, and arch Deformation control is highly reliable, and can be with
Realize precast assembly rapid construction, being very suitable for substrate, there are dilatancy and rheological characteristic Soft Rock Area high-speed railway subgrade work
Journey has a extensive future.
Detailed description of the invention
The present invention includes following four width attached drawing:
Fig. 1 is a kind of stereoscopic schematic diagram of transit railway soft rock heavy cut arch Deformation control structure of the present invention；
Fig. 2 is drag stake-reinforced concrete in a kind of transit railway soft rock heavy cut arch Deformation control structure of the present invention
The stereoscopic schematic diagram of native arc panel assembly；
Fig. 3 is a kind of sectional schematic diagram of transit railway soft rock heavy cut arch Deformation control structure of the present invention；
Fig. 4 is D partial enlarged view in Fig. 3.
Component, toponym and corresponding label: right side slopes A, left side slopes B, soft rock bedding C, the right side are shown in figure
Side drag stake 11, left side drag stake 12, reinforced concrete radial plate 20, water proof geotextiles 21, medium-sand seam 22, tooth socket 23, nothing
Tiny fragments of stone, coal, etc. track bed 30, gutter 31.
Specific embodiment
A specific embodiment of the invention is further elaborated with reference to the accompanying drawings and embodiments.
Referring to FIG. 1, FIG. 2 and FIG. 3, a kind of transit railway soft rock heavy cut of the invention arch Deformation control structure, including
Construct the ballastless track roadbed 30 on soft rock bedding C.The two sides of the ballastless track roadbed 30 are in right side slopes A, left side
Right side drag stake 11, left side drag stake 12, right side drag stake 11, left side drag are set along line direction interval respectively on slopes B
Bedding absolute altitude following certain depth is goed deep into stake 12.The steel symmetrical and recessed along roadbed center line is set on the top surface of soft rock bedding C
Reinforced concrete arc panel 20, the both lateral sides of the reinforced concrete radial plate 20 respectively with right side drag stake 11, left side drag stake
12 rigid connections are integrated.Waterproof cushion is set on 20 top surface of reinforced concrete radial plate, ballastless track roadbed 30 fills
On the waterproof cushion.
Referring to Figure 1 and Figure 3, technical principle of the invention is to bear substrate soft rock bedding by reinforced concrete radial plate 20
The upper arch pressure of C, plays the big feature of 20 rigidity of reinforced concrete radial plate, effectively controls substrate arch deformation.Meanwhile passing through
Upper arch pressure is transferred to drag stake 11, left side drag stake 12 on the right side of two sides by the arcuate structure of reinforced concrete radial plate 20, right
Side drag stake 11, left side drag stake 12 generate the sliding force into the intracorporal thrust in ipsilateral slope and right side slopes A, left side slopes B
It resists, play stable side slope and adjusts the effect of slopes stress distribution, further slow down the arch deformation of substrate rock mass.Therefore, originally
Invention can effectively control Soft Rock Area high-speed railway heavy cut and persistently arch up deformation, and adjustable rock mass stress distribution and reinforce
Side slope is closed on, to advantageously reduce project cost.
Referring to Fig. 2, the both lateral sides of the reinforced concrete radial plate 20 are in the comb teeth-shaped extended along line direction, increment
It is rigidly connected with corresponding right side drag stake 11, left side drag stake 12.Tooth socket 23 between adjacent two tooth is in rectangle, and length is not
Greater than 3.0m, and 30 range of ballastless track roadbed is not entered.Rectangle tooth socket 23 can effectively shift the change of soft rock water swelling generation
Shape further decreases the substrate bulbs of pressure and deformation.
Referring to Fig. 3, gutter 31 is set, right side drag stake 11, left side are anti-outside 30 both lateral sides of ballastless track roadbed
Power stake 12 is laid in the outside in ipsilateral gutter 31, and respectively apart from right side slopes A, the left side position slopes B slope foot 2.0-5.0m
Place.Referring to Fig. 2, the right side drag stake 11,12 section of left side drag stake are rectangle, and sectional dimension is not less than 1.5m*1.5m, edge
The stake spacing of line direction is not more than 8.0m, gos deep into bedding absolute altitude depth below not less than 15.0m.The armored concrete arc
Shape plate 20 is formed by vertically and horizontally distributing bar and concreting, and thickness is determined according to arch pressure on substrate soft rock, thickness one
As be not less than 1.0m.
Referring to Fig. 4, the waterproof cushion is usually answered by the water proof geotextiles 21 that are successively laid with from below to up, medium-sand seam 22
It closes and constitutes.
Referring to Figure 1 and Figure 3, the construction party of a kind of transit railway soft rock heavy cut of the invention arch Deformation control structure
Method includes the following steps:
1. construct soft rock bedding C, excavating cut slope side slope is extremely apart from the top surface the soft rock bedding C position 2.0m absolute altitude, according to reinforcing bar
20 design size of concrete arc-shaped plate and position mutually fit soft rock foundation surfacing at 20 bottom surface of reinforced concrete radial plate
The cambered surface matched；
2. drag stake of constructing, excavates downwards rectangle stake holes to stake bottom designed elevation on right side slopes A, left side slopes B, and
With 20 link position of reinforced concrete radial plate at arrange lateral connection reinforcing bar, steel reinforcement cage is put into after borehole cleaning, by lateral connection
Reinforcing bar is connect with steel reinforcement cage longitudinal reinforcement, concrete perfusion, forms side drag stake 11, left side drag stake 12；
3. construction reinforced bar concrete arc-shaped plate 20, builds forming panel on soft rock bedding top surface, assembling reinforcement, and two
Side is reserved transverse steel with drag stake and is connect, and then primary concreting concrete, forms complete reinforced concrete radial plate 20, mixes
Solidifying soil intensity is not less than C30；
4. waterproof cushion is constructed, water proof geotextiles 21, medium coarse sand are successively laid on 20 top surface of reinforced concrete radial plate
Layer 22；
5. ballastless track roadbed 30 of constructing, the placement in layers filler on waterproof cushion form ballastless track roadbed 30, and
In its both lateral sides construction drainage ditch 31.The height that 31 bottom plate of gutter is located at waterproof cushion or more is typically no less than 0.5m.
Roadbed design and arch control structure design are carried out before construction.Roadbed design according to high-speed railway route design requirement,
Determine Cutting Excavation of Expressway position, 30 range of range, depth and ballastless track roadbed, size, position.The control structure that arches up design
According to 30 design position of ballastless track roadbed and size, 20 buried depth of reinforced concrete radial plate and span are determined, reinforcing bar is mixed
Solidifying soil arc panel 20 is placed in the surface layer soft rock bedding C, horizontal distance of the span between right side drag stake 11, left side drag stake 12,
20 thickness of reinforced concrete radial plate is determined according to arch pressure on substrate soft rock.And according to slope height and lithology condition, design
Right side drag stake 11,12 sectional dimension of left side drag stake, stake spacing and go deep into bedding absolute altitude depth below.
Construction is simple of the present invention, project cost is low, and arch Deformation control is highly reliable, and it is fast that precast assembly may be implemented
Speed construction, is very suitable for substrate there are dilatancy and rheological characteristic Soft Rock Area high-speed railway subgrade engineering, has a extensive future.
The above is explain through diagrams a kind of transit railway soft rock roadbed arch control structure of the present invention and construction party
Some principles of method are not intended to for the present invention being confined in shown and described specific structure and the scope of application, therefore all institutes
It is possible that the corresponding modification being utilized and equivalent, belong to the applied the scope of the patents of the present invention.
Claims (6)
- The Deformation control structure 1. a kind of transit railway soft rock heavy cut arches up, including construct on soft rock bedding (C) without the tiny fragments of stone, coal, etc. Track bed (30), it is characterized in that: the two sides of the ballastless track roadbed (30) are in right side slopes (A), left side slopes (B) points Right side drag stake (11), left side drag stake (12), right side drag stake (11), left side drag stake are not set along line direction interval (12) go deep into bedding absolute altitude following certain depth；It is arranged on the top surface of soft rock bedding (C) symmetrical and recessed along roadbed center line Reinforced concrete radial plate (20), the both lateral sides of the reinforced concrete radial plate (20) respectively with right side drag stake (11), left Side drag stake (12) rigid connection is integrated；Waterproof cushion, no tiny fragments of stone, coal, etc. rail are set on reinforced concrete radial plate (20) top surface Road Base (30) is filled on the waterproof cushion.
- The Deformation control structure 2. a kind of transit railway soft rock heavy cut as described in claim 1 arches up, it is characterized in that: the nothing It is arranged gutter (31) outside tiny fragments of stone, coal, etc. track bed (30) both lateral sides, right side drag stake (11), left side drag stake (12) are laid in together The outside in side gutter (31), and respectively at right side slopes (A), the position left side slopes (B) slope foot 2.0-5.0m.
- The Deformation control structure 3. a kind of transit railway soft rock heavy cut as claimed in claim 2 arches up, it is characterized in that: the right side Side drag stake (11), left side drag stake (12) section are rectangle, and sectional dimension is not less than 1.5m*1.5m, along the stake of line direction Spacing is not more than 8.0m, gos deep into bedding absolute altitude depth below not less than 15.0m.
- The Deformation control structure 4. a kind of transit railway soft rock heavy cut as described in claim 1 arches up, it is characterized in that: the steel Reinforced concrete arc panel (20) is formed by vertically and horizontally distributing bar and concreting, and thickness is according to arch pressure on substrate soft rock It determines, thickness is not less than 1.0m.
- The Deformation control structure 5. a kind of transit railway soft rock heavy cut as described in claim 1 arches up, it is characterized in that: it is described every Water subfill by be successively laid with from below to up water proof geotextiles (21), medium-sand seam (22) is compound constitutes.
- 6. a kind of construction method of transit railway soft rock heavy cut arch Deformation control structure as described in claim 1 to 5, including Following steps:1. constructing soft rock bedding (C), excavating cut slope side slope is extremely apart from the top surface position 2.0m soft rock bedding (C) absolute altitude, according to reinforcing bar Concrete arc-shaped plate (20) design size and position, by soft rock foundation surfacing at reinforced concrete radial plate (20) bottom surface Compatible cambered surface；2. drag stake of constructing, excavates downwards rectangle stake holes to stake bottom designed elevation in right side slopes (A), left side slopes (B), and With reinforced concrete radial plate (20) link position at arrange lateral connection reinforcing bar, be put into steel reinforcement cage after borehole cleaning, will laterally connect It connects reinforcing bar to connect with steel reinforcement cage longitudinal reinforcement, concrete perfusion, forms the stake of side drag (11), left side drag stake (12)；3. construction reinforced bar concrete arc-shaped plate (20), builds forming panel on soft rock bedding top surface, assembling reinforcement, and in two sides Transverse steel is reserved with drag stake to connect, then primary concreting concrete, forms complete reinforced concrete radial plate (20), Concrete strength is not less than C30；4. waterproof cushion is constructed, water proof geotextiles (21), medium coarse sand are successively laid on reinforced concrete radial plate (20) top surface Layer (22)；5. constructing ballastless track roadbed (30), the placement in layers filler on waterproof cushion is formed ballastless track roadbed (30), and In its both lateral sides construction drainage ditch (31), the height that gutter (31) bottom plate is located at waterproof cushion or more is typically no less than 0.5m。
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111118970A (en) * | 2020-01-17 | 2020-05-08 | 中铁二院工程集团有限责任公司 | High-speed railway expansive rock-soil deep cutting 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 |
| CN114687253A (en) * | 2022-03-03 | 2022-07-01 | 中国土木工程集团有限公司 | Ballastless track railway roadbed waterproof structure and construction method |
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