CN109853530A - Supporting bridge structure and the Bridge Pile Foundation Construction technique for increasing pile foundation flexibility - Google Patents
Supporting bridge structure and the Bridge Pile Foundation Construction technique for increasing pile foundation flexibility Download PDFInfo
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- CN109853530A CN109853530A CN201910047704.7A CN201910047704A CN109853530A CN 109853530 A CN109853530 A CN 109853530A CN 201910047704 A CN201910047704 A CN 201910047704A CN 109853530 A CN109853530 A CN 109853530A
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Abstract
The present invention provides a kind of supporting bridge structure and the Bridge Pile Foundation Construction techniques of increase pile foundation flexibility, suitable for shallowly covering the supporting bridge of complete formation area, it includes pile foundation ontology, reaming casing and filled layer, the pile foundation ontology has the first supporting section and the second supporting section along wherein axis direction, first supporting section is plugged in the reaming casing, and the periphery wall of first supporting section is contacted with the inner tube wall of the reaming casing, second supporting section stretches out one end of the reaming casing, and second supporting section is contacted with rock stratum；The filled layer is wrapped on the outer tube wall of the reaming casing.Pile foundation structure advantages of simple, pile foundation Equalsettlement are effectively guaranteed pile foundation and adjacent pier pile foundation to the common stress of horizontal impact, so that pile foundation durability is reinforced.
Description
Technical field
The present invention relates to science of bridge building fields, in particular to a kind of supporting bridge structure and increase pile foundation flexibility
Bridge Pile Foundation Construction technique.
Background technique
For karst landform, karsts developing area and rock stratum big rise and fall, part of rock stratum good integrity, intensity are high and bury
It is deep shallower.When the region bridge construction, pile foundation top is respectively positioned in whole plate rock stratum, and pile foundation embedded depth is insufficient, pile top rigidity mistake
Greatly, when bridge top is there are when horizontal direction impact, this position stress is concentrated, and is highly vulnerable to breakage.
There are mainly two types of methods for existing processing technique:
First is that abolishing rock stratum to certain depth, the method is related to rock in foundation pit and abolishes, and safety is poor and takes time and effort；
Second is that being replaced using Extended chemotherapy to pile foundation, the method is influenced by soil layer cladding thickness, and the foundation pit depth is not
One, and pile foundation supporting cost is high, while Extended chemotherapy type of foundation different from Adjacent Pile basis category, is bound to cause sedimentation unevenness,
Influence bridge span structure quality of finished bridge.
Summary of the invention
The purpose of the present invention is to provide a kind of supporting bridge structures, shallowly cover complete rock stratum area to improve traditional being located at
The problem that the safety of pile foundation is poor when the Bridge Pile Foundation Construction of domain, cost is high.
The purpose of the present invention is to provide a kind of Bored Pile of Bridge construction technologies, are shallowly covered completely with improving traditional being located at
The problem that the safety of pile foundation is poor when formation area Bridge Pile Foundation Construction, cost is high.
The embodiment of the present invention is achieved in that
Based on above-mentioned first purpose, the present invention provides a kind of supporting bridge structures, suitable for shallowly covering complete rock stratum area
The supporting bridge in domain comprising pile foundation ontology, reaming casing and filled layer, the pile foundation ontology have along wherein axis direction
First supporting section and the second supporting section, first supporting section are plugged in the reaming casing, and first supporting section
Periphery wall is contacted with the inner tube wall of the reaming casing, and second supporting section stretches out one end of the reaming casing, and described
Second supporting section is contacted with rock stratum；The filled layer is wrapped on the outer tube wall of the reaming casing.
In preferred embodiments of the present invention, the filled layer is coarse sands layer.
In preferred embodiments of the present invention, the pile foundation ontology is circle perpendicular to the section outer contour shape of its central axes
Shape, the diameter of first supporting section are D1, and the diameter of second supporting section is D2, wherein the numerical value of the D1 is greater than institute
The numerical value of D2 is stated, and the difference of the D1 and D2 is 100mm-120mm.
In preferred embodiments of the present invention, the filled layer is annulus perpendicular to the cross sectional shape of wherein axis direction
Shape, the outer diameter of the filled layer are D3, wherein the difference of the D3 and D2 is 300mm-320mm.
Based on above-mentioned second purpose, the present invention provides a kind of Bridge Pile Foundation Construction technique for increasing pile foundation flexibility, applications
In the supporting bridge structure, the construction technology includes the following steps:
Step s100, drilling obtains filling hole,
Step s200, reaming casing is placed in the filling hole, the periphery wall of the reaming casing and the filling hole
Inner hole wall between form annular filling cavity, the internal perisporium of the reaming casing surrounds first to irrigating region,
Step s300, coarse sand is filled in the filling cavity, and add into the filling cavity water make it is described thick
Sand forms filled layer,
Step s400, bottom hole to the set depth in the filling hole forms second to irrigating region,
Step s500, concrete is successively perfused to described second to irrigating region and described first in irrigating region
To obtain pile foundation ontology.
In preferred embodiments of the present invention, in the step s100, guide protective tube is set in hole site to be drilled, it is described to lead
Internal diameter to the internal diameter of casing not less than the filling hole.
In preferred embodiments of the present invention, in the step s200, adjusting the reaming casing makes the reaming casing
It is coaxial with the filling hole.
In preferred embodiments of the present invention, in the step s200, the periphery wall of the reaming casing is bonded guiding
Face is inserted into the filling hole along the central axes direction in the filling hole.
In preferred embodiments of the present invention, in the step s300, filled out using layered mode from bottom to top described
It fills and fills coarse sand in cavity.
In preferred embodiments of the present invention, in the step s300, when filling the coarse sand of same layer, packed height is poor
No more than 300mm.
The beneficial effect of the embodiment of the present invention is:
In conclusion being carried out the embodiment of the invention provides a kind of supporting bridge structure shallowly covering complete formation area
It is thick by backfilling first in such a way that major diameter drill bit carries out reaming in conjunction with reaming casing to top rock stratum when bridge construction
Sand increase stake top flexibility, the karst landform Bridge Pile Foundation Construction shallow suitable for scar buried depth, abolished relative to traditional rock,
Change the methods of base form, it is widely used, practicability, adaptable.Meanwhile than traditional rock restructuring bankrupt, engineering is made
Valence is low, compared to the high expense that high-intensitive rock is abolished, is more applicable for shallowly covering the bridge pile foundation work of complete formation area
Journey.In the construction process, only reaming part is needed using reaming casing, compared to the large volume reinforced concrete structure of Extended chemotherapy,
Material economy is obvious.Meanwhile when Bored Pile of Bridge construction, using support construction provided in this embodiment, it can be ensured that bridge foundation
For same type, avoids base form different and cause sedimentation uneven, be effectively guaranteed pile foundation to the common of horizontal impact
Stress, so that pile foundation durability is reinforced.
Bored Pile of Bridge construction technology provided in this embodiment includes above-mentioned supporting bridge structure, has above-mentioned bridge branch
All advantages of support structure.
Detailed description of the invention
In order to illustrate the technical solution of the embodiments of the present invention more clearly, below will be to needed in the embodiment attached
Figure is briefly described, it should be understood that the following drawings illustrates only certain embodiments of the present invention, therefore is not construed as pair
The restriction of range for those of ordinary skill in the art without creative efforts, can also be according to this
A little attached drawings obtain other relevant attached drawings.
Fig. 1 is the schematic diagram of the supporting bridge structure of the embodiment of the present invention；
Fig. 2 is the schematic diagram that hole is filled in the Bridge Pile Foundation Construction of the embodiment of the present invention；
Fig. 3 be the embodiment of the present invention Bridge Pile Foundation Construction in reaming casing be installed after schematic diagram；
Fig. 4 is the schematic diagram of filled layer in the Bridge Pile Foundation Construction of the embodiment of the present invention；
Fig. 5 is the schematic diagram of the second irrigating region in the Bridge Pile Foundation Construction of the embodiment of the present invention.
Icon: 001- lithosphere；100- pile foundation ontology；The first supporting section of 110-；The second supporting section of 120-；200-
Reaming casing；300- filled layer；400- guide protective tube；500- annular fills cavity；600- first is to irrigating region；
700- second is to irrigating region；800- fills hole.
Specific embodiment
When carrying out bridge construction for karst landform region, there are two types of methods, first is that rock stratum is abolished to certain depth,
The method is related to rock in foundation pit and abolishes, and safety is poor and takes time and effort.Second is that pile foundation is replaced using Extended chemotherapy,
The method is influenced by soil layer cladding thickness, and foundation pit is deep mixed, and pile foundation supporting cost is high, while Extended chemotherapy and neighboring piles
Plinth belongs to different type of foundation, is bound to cause sedimentation unevenness, influences bridge span structure quality of finished bridge.
In consideration of it, inventor devises a kind of supporting bridge structure and Bored Pile of Bridge construction technology, pile foundation structure
Advantages of simple, pile foundation Equalsettlement are effectively guaranteed pile foundation to the common stress of horizontal impact, so that pile foundation is durable
Property reinforce.
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with the embodiment of the present invention
In attached drawing, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is
A part of the embodiment of the present invention, instead of all the embodiments.The present invention being usually described and illustrated herein in the accompanying drawings is implemented
The component of example can be arranged and be designed with a variety of different configurations.
Therefore, the detailed description of the embodiment of the present invention provided in the accompanying drawings is not intended to limit below claimed
The scope of the present invention, but be merely representative of selected embodiment of the invention.Based on the embodiments of the present invention, this field is common
Technical staff's every other embodiment obtained without creative efforts belongs to the model that the present invention protects
It encloses.
It should also be noted that similar label and letter indicate similar terms in following attached drawing, therefore, once a certain Xiang Yi
It is defined in a attached drawing, does not then need that it is further defined and explained in subsequent attached drawing.
In the description of the present invention, it should be noted that term " center ", "upper", "lower", "left", "right", "vertical",
The orientation or positional relationship of the instructions such as "horizontal", "inner", "outside" is to be based on the orientation or positional relationship shown in the drawings, or be somebody's turn to do
Invention product using when the orientation or positional relationship usually put, be merely for convenience of description of the present invention and simplification of the description, without
It is that the device of indication or suggestion meaning or element must have a particular orientation, be constructed and operated in a specific orientation, therefore not
It can be interpreted as limitation of the present invention.In addition, term " first ", " second ", " third " etc. are only used for distinguishing description, and cannot manage
Solution is indication or suggestion relative importance.
In addition, the terms such as term "horizontal", "vertical", " pendency " are not offered as requiring component abswolute level or pendency, and
It is that can be slightly tilted.It is not to indicate the structure if "horizontal" only refers to that its direction is more horizontal with respect to for "vertical"
It has to fully horizontally, but can be slightly tilted.
In the description of the present invention, it is also necessary to which explanation is unless specifically defined or limited otherwise, term " setting ",
" installation ", " connected ", " connection " shall be understood in a broad sense, for example, it may be fixedly connected, may be a detachable connection or one
Connect to body；It can be mechanical connection, be also possible to be electrically connected；It can be directly connected, it can also be indirect by intermediary
It is connected, can be the connection inside two elements.For the ordinary skill in the art, on being understood with concrete condition
State the concrete meaning of term in the present invention.
It should be noted that in the absence of conflict, the feature in embodiment and embodiment in the present invention can phase
Mutually combination.
Embodiment
Fig. 1-Fig. 5 is please referred to, a kind of supporting bridge structure is present embodiments provided, suitable for shallowly covering complete rock stratum area
The supporting bridge in domain comprising pile foundation ontology 100, reaming casing 200 and filled layer 300, pile foundation ontology 100 is along its central axes
Direction has the first supporting section 110 and the second supporting section 120, and the first supporting section 110 is plugged in reaming casing 200, and first
The periphery wall of supporting section 110 is contacted with the inner tube wall of reaming casing 200, and the second supporting section 120 stretches out the one of reaming casing 200
End, and the second supporting section 120 is contacted with rock stratum；Filled layer 300 is wrapped on the outer tube wall of reaming casing 200.
The supporting bridge structure setting completes rock stratum area in shallow covering, since the outer peripheral portion of pile foundation ontology 100 is enclosed with
Filled layer 300, filled layer 300 can be coarse sands layer, in this way, bridge receives the effect of horizontal direction in bridge use process
Power and when passing to pile foundation ontology 100, horizontal applied force passes to filled layer 300 by pile foundation ontology 100, and filled layer 300 has
There is certain deformability, so that the horizontal applied force acted on pile foundation ontology 100 is at least partly filled the absorption of layer 300, stake
The stress of basic body 100 is more reasonable, also, is digested the horizontal applied force by neighbouring 100 collective effect of pile foundation ontology
It absorbs, improves the case where stress is concentrated, avoid the case where causing pile foundation ontology 100 to damage because of stress concentration.
Meanwhile two-part is set by pile foundation ontology 100, in this way, be located at that bottom and lithosphere 001 directly contact the
Two supporting sections 120 play the role of stablizing entire pile foundation ontology 100, guarantee that pile foundation ontology 100 realizes the work for stablizing supporting bridge
With.And the periphery of superposed first supporting section 110 is filled with coarse sands layer, the rigidity of the first supporting section 110 reduces, and outside is made
It when firmly passing to pile foundation ontology 100, can be absorbed by filled layer 300, and horizontal impact power is by neighboring piles ontology 100
Share, avoid the pile foundation ontology 100 because flexibility deficiency, independent stress and damage.
It should be noted that filled layer 300 can be coarse sands layer, when filling, the stone and clod in coarse sand is cleaned up, is protected
The grains of sand for demonstrate,proving coarse sands layer are uniform.In the present embodiment, coarse sand refers to that granule content of the partial size greater than 0.5mm is more than the 50% of total amount
Sand.
Obviously, in other embodiments, filled layer 300 can also be fine sand layer.
Optional in the present embodiment, pile foundation ontology 100 is generally cylindrical body, and the first supporting section 110 is cylindrical body, and second
Support section 120 is cylindrical body.In other words, pile foundation ontology 100 is circle along the section outer contour shape perpendicular to wherein axis direction
Shape.Setting, the diameter of the first support end section are D1, and the diameter of the second supporting section 120 is D2, and the numerical value of D1 is greater than the numerical value of D2,
And the difference of D1 and D2 is 100mm-120mm.
For example, the difference that the difference of D1 and D2 can be 100mm, D1 and D2 can be 120mm or other differences,
This is without enumerating.
Optional in the present embodiment, filled layer 300 is circular ring shape, filled layer perpendicular to the cross sectional shape of wherein axis direction
300 outer diameter is D3, wherein the difference of D3 and D2 is 300mm-320mm.
For example, the difference that the difference of D3 and D2 is 300mm or D3 and D2 is 320mm, herein without enumerating.
It should be noted that reaming casing 200 can be steel pile casting.
Embodiment
A kind of Bored Pile of Bridge construction technology is present embodiments provided, the supporting bridge knot mentioned applied to above-described embodiment
Structure, the construction technology include the following steps:
Step s100, drilling obtains filling hole 800, and when drilling by the way of rotary digging drilling hole, the diameter in filling hole 800 is
D3, namely the diameter in filling hole 800 are equal with the outer diameter of filled layer 300, and the internal perisporium in filling hole 800 is that filled layer 300 is filled out
Periphery wall after the completion of filling.When filling the construction of hole 800, drilling depth is less than the depth of pile foundation ontology 100, fills the hole in hole 800
Diameter is greater than the outer diameter of pile foundation ontology 100.It should be noted that need to guarantee the verticality of drilling in boring procedure, it is final to obtain
The filling hole 800 arrived is cylindrical hole.
Optionally, guide protective tube 400 is set in hole site to be drilled, the internal diameter of guide protective tube 400 is not less than filling hole 800
Internal diameter.Guide protective tube 400 can be circular ring shape, guiding perpendicular to the cross sectional shape of its length direction with steel pile casting, guide protective tube 400
Casing 400, filling hole 800 and reaming casing 200 are coaxially disposed.
Step s200, reaming casing 200 is placed in filling hole 800, the periphery wall of reaming casing 200 and filling hole 800
Inner hole wall between form annular filling cavity 500, the internal perisporium of reaming casing 200 surrounds first to irrigating region 600.Reaming
Casing 200 is steel pile casting, and reaming casing 200 is circular ring shape perpendicular to the cross sectional shape of its length direction, and reaming casing 200 is installed
After in filling hole 800, reaming casing 200 and filling hole 800 are coaxially disposed.The internal diameter of reaming casing 200 is D1 namely first
The outer diameter of the first supporting section 110 of pile foundation ontology 100 is formed after 600 concrete perfusion of irrigating region.
Optionally, when reaming casing 200 is placed, adjustment reaming casing 200 keeps reaming casing 200 and filling hole 800 same
Axis.In the process, the periphery wall fitting guide surface of reaming casing 200 is inserted into along the central axes direction in filling hole 800 and is filled out
It fills in hole 800.For example, can circumferentially lay multiple guide pads, guide pad direction filling along it at the port in filling hole 800
The face of the center of circle side in hole 800 is set as guide surface, and guide surface can be partial cylindrical surface, and multiple guide surfaces are located at same cylinder
On face, which is the periphery wall of reaming casing 200.
Step s300, coarse sand is filled in filling cavity, and addition water makes coarse sand form filled layer into filling cavity
300, it when carrying out coarse sand filling, is filled by the way of being layered from the bottom to top, for example, cavity 500 4 can be filled in annular
Multiple filling positions are arranged in week, and multiple filling positions can be by manually carrying out back-up sand work, and multiple filling positions are filled out simultaneously
Sand operation after filling quantitative coarse sand, forms the layer of sand of certain altitude in annular filling cavity 500, and then water rams closely knit, then
Carry out the filling of next layer of coarse sand.
It should be noted that, when filling the coarse sand of same layer, packed height difference is not more than in coarse sand filling process
300mm。
Step s400, bottom hole to the set depth in filling hole 800 forms second to irrigating region 700, first to
Irrigating region 600 is cylindrical hole, and second to irrigating region 700 is cylindrical hole, and first is greater than to the diameter of irrigating region 600
Second diameter to irrigating region 700.
Step s500, concrete is successively perfused to second to irrigating region 700 and first in irrigating region 600 with
Obtain pile foundation ontology 100.It should be noted that in concrete perfusion, by steel reinforcement cage be placed in first to irrigating region 600 with
And second to after concrete perfusion, form the pile foundation ontology 100 of reinforced concrete structure in irrigating region 700.
In filling process, reaming casing 200 is stayed in filling hole 800, in this way, keeping the stable structure of filled layer 300
Property, and then guarantee the stability of entire support construction, after the completion of pile foundation ontology 100 is constructed, it is located at first in irrigating region 600
The first supporting section 110 outside there is coarse sands layer, the top rigidity of pile foundation ontology 100 reduces, shares jointly with Adjacent Pile basis
The horizontal impact force of bridge, avoid the pile foundation ontology 100 because flexibility deficiency, independent stress and damage.
It should be noted that reaming casing 200 rolls processing and fabricating, all double grooves of weld seam, every section using machinery
Production length is 2m-5m.Further, the attachment weld of every section reaming casing 200 is all made of two-sided bevel and is fully welded,
, need to also be in the reinforcement steel disc of seam crossing welding 30cmx30cm, 10 ㎜ of thickness outside the junction welding of two section casings, each interface is equal
It is even, be arranged symmetrically 4 reinforcement steel discs.
The foregoing is only a preferred embodiment of the present invention, is not intended to restrict the invention, for the skill of this field
For art personnel, the invention may be variously modified and varied.All within the spirits and principles of the present invention, made any to repair
Change, equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.
Claims (10)
1. a kind of supporting bridge structure, suitable for shallowly covering the supporting bridge of complete formation area, which is characterized in that it includes stake
Basic body, reaming casing and filled layer, the pile foundation ontology have the first supporting section and the second support along wherein axis direction
Section, first supporting section are plugged in the reaming casing, and the periphery wall of first supporting section and the reaming casing
Inner tube wall contact, second supporting section stretches out one end of the reaming casing, and second supporting section is contacted with rock stratum；
The filled layer is wrapped on the outer tube wall of the reaming casing.
2. supporting bridge structure according to claim 1, which is characterized in that the filled layer is coarse sands layer.
3. supporting bridge structure according to claim 1, which is characterized in that the pile foundation ontology is perpendicular to its central axes
Section outer contour shape is circle, and the diameter of first supporting section is D1, and the diameter of second supporting section is D2, wherein
The numerical value of the D1 is greater than the numerical value of the D2, and the difference of the D1 and D2 is 100mm-120mm.
4. supporting bridge structure according to claim 3, which is characterized in that the filled layer is perpendicular to wherein axis direction
Cross sectional shape be circular ring shape, the outer diameter of the filled layer is D3, wherein the difference of the D3 and D2 is 300mm-
320mm。
5. a kind of Bridge Pile Foundation Construction technique for increasing pile foundation flexibility, which is characterized in that be applied to any in claim 1-4
Supporting bridge structure described in, the construction technology include the following steps:
Step s100, drilling obtains filling hole,
Step s200, reaming casing is placed in the filling hole, the periphery wall of the reaming casing is interior with the filling hole
Forming annular filling cavity between hole wall, the internal perisporium of the reaming casing surrounds first to irrigating region,
Step s300, coarse sand is filled in the filling cavity, and add water into the filling cavity to make the coarse sand shape
At filled layer,
Step s400, bottom hole to the set depth in the filling hole forms second to irrigating region,
Step s500, concrete is successively perfused to described second to irrigating region and described first in irrigating region with
To pile foundation ontology.
6. the Bridge Pile Foundation Construction technique according to claim 5 for increasing pile foundation flexibility, which is characterized in that
In the step s100, guide protective tube is set in hole site to be drilled, the internal diameter of the guide protective tube is not less than the filling
The internal diameter in hole.
7. the Bridge Pile Foundation Construction technique according to claim 5 for increasing pile foundation flexibility, which is characterized in that
In the step s200, adjusting the reaming casing keeps the reaming casing and the filling hole coaxial.
8. the Bridge Pile Foundation Construction technique according to claim 7 for increasing pile foundation flexibility, which is characterized in that
In the step s200, the periphery wall fitting guide surface of the reaming casing is inserted along the central axes direction in the filling hole
Enter into the filling hole.
9. the Bridge Pile Foundation Construction technique according to claim 5 for increasing pile foundation flexibility, which is characterized in that
In the step s300, coarse sand is filled in the filling cavity using layered mode from bottom to top.
10. the Bridge Pile Foundation Construction technique according to claim 9 for increasing pile foundation flexibility, which is characterized in that
In the step s300, when filling the coarse sand of same layer, packed height difference is not more than 300mm.
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| CN201910047704.7A CN109853530B (en) | 2019-01-21 | 2019-01-21 | Bridge supporting structure and bridge pile foundation construction process for increasing pile foundation flexibility |
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Cited By (1)
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| CN112482201A (en) * | 2020-10-16 | 2021-03-12 | 中铁十九局集团第五工程有限公司 | Permanent steel casing and using method thereof |
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