CN104652279B - Existing structure of the subway box culvert jacking construction method is worn on a kind of newly-built frame bridge - Google Patents
Existing structure of the subway box culvert jacking construction method is worn on a kind of newly-built frame bridge Download PDFInfo
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- CN104652279B CN104652279B CN201310602973.8A CN201310602973A CN104652279B CN 104652279 B CN104652279 B CN 104652279B CN 201310602973 A CN201310602973 A CN 201310602973A CN 104652279 B CN104652279 B CN 104652279B
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- box culvert
- jacking
- subway
- counterweight
- frame bridge
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D21/00—Methods or apparatus specially adapted for erecting or assembling bridges
Abstract
The invention discloses and on a kind of newly-built frame bridge, wear existing structure of the subway box culvert jacking construction method, including: plan to build the side excavation jacking working pit of frame bridge position above existing structure of the subway；Prefabricated box culvert in jacking working pit, box culvert inner bottom part is set up counterweight, balance weight and box culvert weight sum and is fallen soil body weight equal to excavation；Jacking box culvert；After box culvert advancing puts in place, limit is removed counterweight limit and is performed accessory structure, removes counterweight and is equal in weight with the accessory structure performed, and completes frame bridge construction.The present invention is a kind of construction method using the box culvert advancing mode setting up counterweight to deform to control structure of the subway to float above existing structure of the subway during newly-built frame bridge, during utilizing box culvert advancing, use the form increasing counterweight, make up excavation by the weight of counterweight Yu box culvert and fall the weight of the soil body, the lower section soil body is made not unload, control structure of the subway deflection, reduce the impact that existing subway line operation is produced by construction to greatest extent, it is ensured that metro safety operation.
Description
Technical field
The present invention relates to utilize box culvert jacking construction when one builds frame bridge above operated subway circuit, come
Control the construction method of structure of the subway floating deformation, belong to underground engineering field.
Background technology
Along with extensive development and the development construction of urban operating mechanism of urban track traffic, current urban road
And the engineering worn on Box-shaped Drainage Culvert etc. and operated subway crossing elimination gets more and more, in these engineerings, absolutely
Great majority use box culvert open-cut method easily, but inevitably produce surrounding soil during construction and disturb
Dynamic, make the lower section soil body produce resilience, and then operating line malformation can be driven, train fortune can be affected
Line speed, even jeopardizes the operation safety of train.
Specifically, at present, above existing subway line, build box culvert many employings open-cut grouting and reinforcing
Measure, although this Technical comparing is ripe, construction is simple, has wide adaptability in underground engineering, but
For track traffic, there is certain problem in it:
First, along with the web development of rail line, passenger flow is great to be increased, Train Interval pole
Tool shortens, and especially at the route of heavy traffic or higher to Operational requirements, builds during open-cut
Train speed limit or stoppage in transit that box culvert may cause will produce large effect to track traffic.
Second, open-cut can cause the unloading of the lower section soil body at excavation of foundation pit, and then can make the lower section soil body
Deformation of floating occurs, and this deformation is the most uncontrollable, and the track structure of track traffic need to keep higher
Ride comfort, with safety and the requirement of comfortableness of satisfied driving.
As can be seen here, work out a kind of can reduction to greatest extent to construct to existing subway line Influence to operation
Reasonable construction method is current urgent problem.
Summary of the invention
It is an object of the invention to provide and on a kind of newly-built frame bridge, wear existing structure of the subway box culvert jacking construction
Method, the method, during utilizing box culvert advancing, uses the form increasing counterweight, with counterweight and box culvert
Weight makes up excavation and falls the weight of the soil body so that the soil body does not occur unloading effect below, thus controls subway
The floating deflection of structure, reduces construction impact produced on the operation of existing subway line to greatest extent,
The safety and the stationarity that make train operation are guaranteed.
To achieve these goals, present invention employs techniques below scheme:
Existing structure of the subway box culvert jacking construction method is worn, it is characterised in that its bag on a kind of newly-built frame bridge
Include following steps: step one: above existing structure of the subway, plan to build the side of frame bridge position, excavate jacking
Working pit；Step 2: prefabricated box culvert in this jacking working pit, is additionally arranged at the bottom of counterweight in this box culvert, should
The weight of counterweight is equal to, with the weight sum of this box culvert, the soil body weight that excavation falls, to make up excavation jacking work
The weight of the soil body is lost during hole；Step 3: this box culvert of jacking, wherein: in the process of this box culvert of jacking
In, gradually dig the soil body in jacking direction, in order to complete box culvert advancing operation；Step 4: when this box culvert top
After entering position, remove this counterweight, while performing accessory structure, this counterweight of dismounting with perform this is attached
Belong to construction weight equal, make this accessory structure substitute this counterweight, it is ensured that the existing structure of the subway periphery soil body keeps
Stress equilibrium, completes the construction of newly-built frame bridge above existing structure of the subway.
Described counterweight is steel ingot or concrete slab.
Along described box culvert by end face install steel plate, bar-mat reinforcement can be set between this steel plate and described box culvert, will
This bar-mat reinforcement is banded on the reinforcing bar of described concrete slab.
Before performing described step 3, calculate maximum top power and jacking institute that box culvert described in jacking is allowed
State the top journey of box culvert.
If described box culvert size is relatively big, the most described box culvert segmentation is prefabricated and merogenesis jacking.
The invention have the advantage that
The present invention is the box culvert using during newly-built frame bridge above existing structure of the subway and setting up counterweight
Jacking mode controls a kind of construction method of structure of the subway floating deformation, compared with traditional open-cut,
The inventive method, during utilizing box culvert advancing, uses the form increasing counterweight, with the weight of counterweight Yu box culvert
Amount makes up excavation and falls the weight of the soil body so that the lower section soil body does not occur unloading effect, thus controls structure of the subway
Deflection, reduce construction impact produced on the operation of existing subway line to greatest extent so that train
Safety and the stationarity run are guaranteed.Rephrasing the statement, the present invention is a kind of box culvert jacking construction method,
But they are different from traditional box culvert jacking construction method, the present invention is at the base of traditional box culvert jacking construction method
Add counterweight on plinth, make up, by the weight of counterweight Yu box culvert, the soil body weight that excavation falls, serve suppression
The effect of lower section soil body floating deformation, takes full advantage of the principle of stress equilibrium.
Compared with traditional open-cut, train operation will not be caused any shadow in work progress by the present invention
Ringing, train is without speed limit or stoppage in transit.
The composite can be widely applied to road or other urban operating mechanism is built and worn operated subway circuit on box culvert
In construction, it is effective to ensure that the safety of existing subway line, reduces what existing subway line was runed by construction
Impact, is particularly suited for runing busier or higher to track malformation requirement location, can produce
Raw preferable economic benefit and social benefit.
Accompanying drawing explanation
Fig. 1 is the implementing procedure figure of the present invention.
Fig. 2 is box culvert advancing schematic diagram.
Fig. 3 is as viewed from the side of Fig. 2, and the accessory structure after frame bridge has been constructed illustrates figure.
Detailed description of the invention
Include as it is shown in figure 1, wear existing structure of the subway box culvert jacking construction method on the newly-built frame bridge of the present invention
Following steps:
Step one: plan to build the side of frame bridge position above existing structure of the subway, excavates jacking working pit；
Step 2: prefabricated box culvert in this jacking working pit, is additionally arranged at the bottom of counterweight in this box culvert, this counterweight
The soil body weight fallen equal to excavation of the weight sum of weight and this box culvert (refer to excavate in whole work progress
The soil body gross weight fallen), to lose the weight of the soil body during making up excavation jacking working pit；
Step 3: this box culvert of jacking, wherein: during this box culvert of jacking, gradually dig jacking direction
The soil body of (referring to the direction of jacking box culvert), i.e. excavation front, the limit jacking limit soil body, forbids to backbreak, in order to complete
Become box culvert advancing operation；
Step 4: after this box culvert advancing puts in place, while remove this counterweight, while perform accessory structure, dismounting
This counterweight is equal in weight with this accessory structure performed, and makes this accessory structure substitute this counterweight, existing to ensure
The structure of the subway periphery soil body keeps stress equilibrium, thus completes newly-built frame bridge above existing structure of the subway
Construction.
In reality is implemented, counterweight is chosen as steel ingot or concrete slab, depending on concrete condition according to calculating decision.
In jack-in process, protective measure can be taked, such as, by end face, steel plate is installed along box culvert, should
Bar-mat reinforcement is set between steel plate and box culvert, this bar-mat reinforcement is banded on the reinforcing bar of concrete slab, to prevent top
Box culvert is damaged during entering.
In reality is implemented, performing before step 3, should calculate maximum top power that jacking box culvert allowed with
And the top journey of jacking box culvert, control top power and top journey with strict in jack-in process.
If box culvert size is relatively big, then box culvert sectional is prefabricated and merogenesis jacking.
It is preferred that the slide plate of beneficially jacking can be built in jacking working pit, prefabricated box culvert on this slide plate.
In the present invention, the maximum top that the excavation of jacking working pit, the making of box culvert, jacking box culvert are allowed
Power and the top calculating of journey, the making of slide plate, the performing and traditional box culvert jacking construction method of accessory structure
The technology such as the such as jacking involved by are technology known in the art, are not described in detail.
The present invention is the box culvert using during newly-built frame bridge above existing structure of the subway and setting up counterweight
Jacking mode controls a kind of construction method of structure of the subway floating deformation, compared with traditional open-cut,
The inventive method, during utilizing box culvert advancing, uses the form increasing counterweight, with the weight of counterweight Yu box culvert
Amount makes up excavation and falls the weight of the soil body so that the lower section soil body does not occur unloading effect, thus controls structure of the subway
Deflection, reduce construction impact produced on the operation of existing subway line to greatest extent so that train
Safety and the stationarity run are guaranteed.
Rephrasing the statement, the present invention is a kind of box culvert jacking construction method, but itself and traditional box culvert jacking construction
Method is different, present invention is different in that it increases on the basis of traditional box culvert jacking construction method
Counterweight, makes up, by the weight of counterweight Yu box culvert, the soil body weight that excavation falls, thus serves below suppression
The effect of soil body floating deformation, this is to wear in existing structure of the subway construction work never to make on newly-built frame bridge
Used.
Compared with traditional open-cut, train operation will not be caused any shadow in work progress by the present invention
Ringing, train is without speed limit or stoppage in transit.
With an example, the present invention will be described below.
Intend at the newly-built frame bridge in an existing structure of the subway (subway tunnel 10 as shown in Figure 2) top,
Cause the unloading of the underground tunnel upper soil body to make soil body generation resilience to prevent from constructing, make tunnel 10
With the soil body about, deformation of floating occurring, building of frame bridge uses box culvert jacking construction method of the present invention, keeps away
Exempt from train operation is impacted.
Design top board thickness 0.8m of this frame bridge, base plate thickness 1.0m, side wall, middle wall thickness 0.8m, frame bridge
Clear height 6.09～6.56m, height overall 7.89～8.36m, along alignment direction overall length 25.4m, bridge top is laid
Pavement structure.
The detailed process using the inventive method to carry out frame bridge construction building is:
Before construction, take traffic to lead measures such as changing according to practical situation, be beneficial to being smoothed out of construction；
Above existing structure of the subway, plan to build the side, position of frame bridge, excavate jacking working pit 20, in reality
In enforcement, jacking working pit 20 can use 1:1 to put slope excavation, can arrange gutter and sump in hole；
The slide plate (such as armored concrete slide plate) 30 being beneficial to jacking is built in this jacking working pit 20,
Back beam 60 after prefabricated box culvert (i.e. frame bridge base structure) 40 on this slide plate 30, and build, at this back
Banketing in beam 60 rear, forms back 70 (such as armored concrete back), and back bankets gradient form can root
(after jacking completes, back needs to remove) is made the appropriate adjustments according to field condition；
Being additionally arranged at the bottom of counterweight in this box culvert 40, this counterweight elects steel ingot 50 as, and steel ingot 50 is at box culvert 40
The most successively putting on inner bottom plating, gross thickness is 0.5m, and its weight and box culvert 40 weight sum are equal to opening
The soil body gross weight dug up, to lose the weight of the soil body during making up excavation jacking working pit, makes the soil body unload
Carrying capacity is minimum, makes the soil body around structure of the subway lie substantially in virgin state of stress, makes uplift of soil deform
It is down to minimum, fundamentally reduces the probability of deformation of floating；
Use this box culvert 40 of relay well method jacking, during this box culvert 40 of jacking, gradually dig jacking
The soil body in front, i.e. limit excavation front soil body limit jacking, every time excavation drilling depth must not exceed setpoint distance (as
Cannot be greater than 0.4m), need if desired ground is processed, before jacking, it is considered to various frictional force are (no
Consider frontal drag), calculating the maximum top power that box culvert allowed is 82858KN, pushes up journey about 49m；
After this box culvert 40 jacking puts in place, removing this steel ingot 50, while performing accessory structure, removing
Steel ingot 50 weight equal to the weight of accessory structure performed so that this accessory structure substitutes this steel ingot 50,
Ensure that the existing structure of the subway periphery soil body keeps stress equilibrium, such as, perform the waterproof construction at structural joint and case
Contain the pavement structure (bridge floor railing 81 as shown in Figure 3 etc.) above 40, thus complete existing
The construction operation of newly-built frame bridge above iron construction.
In reality is implemented, during jacking, the two sides that box culvert 40 is pushed up can be provided with cold gluing emulsion waterproof layer,
Additionally, 1:3 machine oil Pulvis Talci also can be coated with, to reduce jacking frictional force.
In reality is implemented, slide plate 30 surface requirements is smooth, and, during for preventing box culvert 40 jacking
Pricking head, slide plate 30 end face can be provided with and face upward slope accordingly, and slide plate 30 bottom front can be provided with fore slope, the gradient
It is 1 ‰～5 ‰.
Reality implement in, except arranging slide plate 30, also can relative set crushed stone concrete bed course, reinforcing bar mix
Solidifying soil base plate, lubricating layer (smearing machine oil, Pulvis Talci on it), plastic bottom board sealing coat etc., these all may be used
Need and respective design according to practical situation, belong to techniques well known.
In reality is implemented, can set up corresponding appurtenant work according to practical situation in work progress, these are attached
Belonging to the accessory structure building related in engineering is all technology known in the art, is exemplified below.Such as,
The armored concrete basil 41 can be set in box culvert (frame bridge base structure) 40 front ends, to prevent side soil
Body caves in, when box culvert 40 jacking rear cutout in place is removed.The most such as, can be in jacking construction, in box culvert 40 side
The basil and bottom front arrange steel side edge angle and steel shear blade angle, to ensure to cut soil and the entering smoothly of jacking
OK, remove after box culvert 40 jacking is in place.The most such as, after frame bridge construction, can be to its both sides one
The soil body in the range of Ding processes, and can perform transition slab at bridge head 82 accordingly, with improve driving safety and
Comfortableness.The most such as, after frame bridge has been constructed, if the built position of frame bridge is in river course, then need
The structures such as the original river course barricade etc. removed before constructing recovers, the river course barricade of recovery see in Fig. 3
Part shown in label 90.
The composite can be widely applied to road or other urban operating mechanism is built and worn operated subway circuit on box culvert
In construction, it is effective to ensure that the safety of existing subway line, reduces what existing subway line was runed by construction
Impact, is particularly suited for runing busier or higher to track malformation requirement location, can produce
Raw preferable economic benefit and social benefit.
The above is presently preferred embodiments of the present invention and the know-why used thereof, for the skill of this area
For art personnel, without departing from the spirit and scope of the present invention, any based on the technology of the present invention side
Equivalent transformation on the basis of case, simple replacement etc. obviously change, belong to scope it
In.
Claims (4)
1. wear existing structure of the subway box culvert jacking construction method on a newly-built frame bridge, it is characterised in that
It comprises the steps:
Step one: plan to build the side of frame bridge position above existing structure of the subway, excavates jacking working pit；
Step 2: prefabricated box culvert in this jacking working pit, is additionally arranged at the bottom of counterweight in this box culvert, this counterweight
The soil body weight fallen equal to excavation of the weight sum of weight and this box culvert, to make up excavation jacking working pit mistake
Journey is lost the weight of the soil body；
Step 3: this box culvert of jacking, wherein: during this box culvert of jacking, gradually dig jacking direction
The soil body, in order to complete box culvert advancing operation；
Step 4: after this box culvert advancing puts in place, removes this counterweight, while performing accessory structure, tears open
This counterweight removed is equal in weight with this accessory structure performed, and makes this accessory structure substitute this counterweight, it is ensured that both
There is the structure of the subway periphery soil body to keep stress equilibrium, complete executing of above existing structure of the subway newly-built frame bridge
Work.
Existing structure of the subway box culvert jacking construction method is worn on newly-built frame bridge the most as claimed in claim 1,
It is characterized in that:
Described counterweight is steel ingot or concrete slab.
Existing structure of the subway box culvert jacking construction method is worn on newly-built frame bridge the most as claimed in claim 1,
It is characterized in that:
Before performing described step 3, calculate maximum top power and jacking institute that box culvert described in jacking is allowed
State the top journey of box culvert.
Existing structure of the subway box culvert jacking construction method is worn on newly-built frame bridge the most as claimed in claim 1,
It is characterized in that:
If described box culvert size is relatively big, the most described box culvert segmentation is prefabricated and merogenesis jacking.
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| CN201310602973.8A CN104652279B (en) | 2013-11-25 | 2013-11-25 | Existing structure of the subway box culvert jacking construction method is worn on a kind of newly-built frame bridge |
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|---|---|---|---|
| CN201310602973.8A CN104652279B (en) | 2013-11-25 | 2013-11-25 | Existing structure of the subway box culvert jacking construction method is worn on a kind of newly-built frame bridge |
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| CN104652279A CN104652279A (en) | 2015-05-27 |
| CN104652279B true CN104652279B (en) | 2016-08-17 |
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