CN109914432A - A kind of execavated rockmass pre-reinforcement piling wall supporting construction and method - Google Patents
A kind of execavated rockmass pre-reinforcement piling wall supporting construction and method Download PDFInfo
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- CN109914432A CN109914432A CN201910294079.6A CN201910294079A CN109914432A CN 109914432 A CN109914432 A CN 109914432A CN 201910294079 A CN201910294079 A CN 201910294079A CN 109914432 A CN109914432 A CN 109914432A
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Abstract
The invention discloses a kind of execavated rockmass pre-reinforcement piling wall supporting construction and methods, including several soil blocking piles being arranged in side slope, several rotary churning piles are set along the inter-pile soil line of apsides between two neighboring soil blocking pile, wherein the rotary churning pile on rear side of face soil blocking pile is rotary churning pile after stake, remaining rotary churning pile is rotary churning pile between stake, rotary churning pile axis vertical after the stake, it further include the retaining wall between two soil blocking piles, the front side of the retaining wall is face slope, and rotary churning pile is adjacent between the rear side of the retaining wall and each stake.The purpose of the present invention is to provide a kind of execavated rockmass pre-reinforcement piling wall supporting construction and methods; to solve the problems, such as that retaining wall is easy to cause piling wall support system partial failure in the prior art, realizes the purpose excavated before reducing stake and inter-pile soil intensity is disturbed and protected to inter-pile soil.
Description
Technical field
The present invention relates to slope supporting fields, and in particular to a kind of execavated rockmass pre-reinforcement piling wall supporting construction and method.
Background technique
When execavated rockmass uses friction pile supporting and retaining system, after pile concrete reaches design requirement intensity, rock before stake can be excavated
Soil, construction inter-pile soil supporting and retaining system.Inter-pile soil retaining structure is frequently with breast boards or retaining wall.
Breast boards generally uses preceding hanging hang structure.Front hanging construction need to generally be planted using epoxy resin in pile body built-in connection
Muscle, there are following Railway Projects in bar planting hanging plate technique: first is that main reinforcement arrangement in pile body surface side is closeer, bar planting drilling is inevitable
Meeting damage stress main reinforcement, reduce pile structural strength；Second is that main reinforcement surface side protective layer is generally 5~7cm, bar planting drilling is easy
Damage cover concrete；Third is that the positioning accuracy of steel planting is difficult to ensure, it be easy to cause cladding panel height uneven, vision effect
Fruit is poor.
And for the retaining structure using retaining wall, since retaining wall need to be excavated to barricade substrate design altitude by soil before stake
It could construct later, when inter-pile soil intensity is insufficient or meets with rainfall, easily cause inter-pile soil unstability to collapse, and then lead to piling wall
Support system partial failure.
Summary of the invention
The purpose of the present invention is to provide a kind of execavated rockmass pre-reinforcement piling wall supporting construction and methods, to solve existing skill
Retaining wall is easy to cause the problem of piling wall support system partial failure in art, realizes that excavation is disturbed and protected to inter-pile soil before reducing stake
Protect the purpose of inter-pile soil intensity.
The present invention is achieved through the following technical solutions:
A kind of execavated rockmass pre-reinforcement piling wall supporting construction, it is two neighboring including several soil blocking piles being arranged in side slope
Several rotary churning piles are set along the inter-pile soil line of apsides between soil blocking pile, wherein the rotary churning pile on rear side of face soil blocking pile be rotary churning pile after stake,
Remaining rotary churning pile rotary churning pile between stake, rotary churning pile axis vertical after the stake further include the earth-retaining between two soil blocking piles
The front side of wall, the retaining wall is face slope, and rotary churning pile is adjacent between the rear side of the retaining wall and each stake.
Aiming at the problem that retaining wall in the prior art is easy to cause piling wall support system partial failure, the present invention proposes one kind
Execavated rockmass pre-reinforcement piling wall supporting construction, soil blocking pile is laid out in side slope according to conventional design, two neighboring
Several rotary churning piles are set before soil blocking pile.Wherein, the rear side of soil blocking pile is stake next to the rotary churning pile that the position of soil blocking pile is arranged
Rotary churning pile afterwards, remaining is located at the rotary churning pile between stake of the rotary churning pile between two soil blocking piles.Several rotary churning piles are set along the inter-pile soil line of apsides
It sets, therefore rotary churning pile is linked to be arcuate structure between rotary churning pile, stake after the stake between two neighboring soil blocking pile, between all soil blocking piles
Rotary churning pile is distributed in continuous M type.The name of rotary churning pile is simply facilitated in different positions between rotary churning pile, stake after stake in the application
The rotary churning pile set distinguishes, and the structure of rotary churning pile or whirl spraying technique have difference between rotary churning pile, stake after restriction stake.Whirl spraying
Stake is that rotary jet grouting pipe and spray head brill are placed in a bottom design altitude using drilling machine, and preparatory prepared slurries are passed through high pressure
After generating apparatus makes liquid stream obtain huge energy, is ejected from the nozzle high speed of slip casting tube edge, form one energy height collection
In liquid stream, the direct destruction soil body, in course of injection, drilling rod is promoted in rotation, be thoroughly mixed slurries with the soil body,
The column induration that certain diameter is formed in soil, so that ground be made to be reinforced.Although rotary churning pile is the prior art, digging
It yet there are no utilization in the field of square Anti-sliding Pile supporting and retaining system.Retaining wall is arranged between two neighboring soil blocking pile the present invention, gear
The front side of cob wall is the face slope with constant slope like the prior art, and the rear side of retaining wall rotary churning pile directly between each stake
It is adjacent, so that surveying template without vertical back when retaining wall is poured, only needs outside formwork erection cast-in-place, ensure that alien invasion
Smooth surface is clean and tidy, has good visual effect compared to traditional front hanging breast boards.The present invention is based on pile-soil interaction theory and
Loading characteristic, by arc be distributed several rotary churning piles to after stake and inter-pile soil carry out pre-reinforcement, stake holes can be reduced to a certain degree
The pressure of retaining wall soil when pore-forming plays the interim supporting and retaining system protective action of inter-pile soil after soil excavates before soil blocking pile cantilever segment stake, maximum
Disturbance of the excavation to inter-pile soil before reducing stake of limit, protects the intensity of inter-pile soil.Further, since soil blocking pile is necessarily vertical
Distribution, therefore the axis that rotary churning pile after stake is arranged is also vertical, it is ensured that rotary churning pile can be whole close to, it is ensured that stake with soil blocking pile after stake
Rotary churning pile is to the reliable reinforcement effect of soil stabilization after stake afterwards.
Preferably, the rotary churning pile between two neighboring soil blocking pile in the horizontal plane along and the consistent curve distribution of the native line of apsides,
The concave surface of the curve is towards the front side of soil blocking pile.The front side of soil blocking pile is soil blocking pile towards the side below side slope, similarly
The rear side of soil blocking pile is the side being directed towards above side slope.In this programme rotary churning pile it is curved be distributed in two neighboring soil blocking pile it
Between, and the concave surface of curve can more be bonded the stress condition of inter-pile soil towards the front side of soil blocking pile, the energy after soil before excavating stake
Better bracing reinforcement effect is enough provided.
Preferably, the axis vertical of rotary churning pile or inclination between the stake: when the axis vertical of rotary churning pile between stake, the gear
The trailing flank of cob wall is also distributed vertically；When the axis inclination of rotary churning pile between stake, the trailing flank of the retaining wall is also tilted, and keeps off
The inclined degree of cob wall trailing flank is identical as the axis of rotary churning pile between stake.Be between stake rotary churning pile can be set to it is vertical, can also
With inclination.Rotary churning pile difficulty in constructing operation is bigger between inclined stake, and needing to prepare in advance inclined pedestal can pass through
Whirl spraying drilling is constructed.Between selecting inclined stake when rotary churning pile, the volume of required retaining wall is revolved compared between vertical stake
It is significantly reduced for spray stake, therefore pour concrete raw material consumed by retaining wall to substantially reduce, advantageously reduces this hair
Bright construction cost.
Preferably, when the axis inclination of rotary churning pile between stake, axis is parallel to the face slope.The axis of rotary churning pile between stake
It is parallel to the face slope, and the back side due to retaining wall is adjacent with rotary churning pile between stake, the back side of retaining wall is necessarily parallel to
Slope surface on front side of its own reduces cement dehydration point in casting process so that retaining wall front and rear sides are parallel, compound with regular structure
The risk of layer.
It preferably, further include the drain hole for running through the rotary churning pile.
A kind of execavated rockmass pre-reinforcement piling wall method for protecting support, comprising the following steps:
(a) soil blocking pile position is determined in side slope, the native line of apsides between two neighboring soil blocking pile carries out jet grouting pile construction；
(b) soil blocking pile is dug；
(c) soil body before excavation soil blocking pile cantilever segment stake；
(d) template on front side of setting retaining wall, cast-in-place retaining wall.
Preferably, the rotary churning pile between two neighboring soil blocking pile is parabolically distributed, the parabolical concave surface direction gear
The front side of native stake.
Preferably, the rotary churning pile on rear side of face soil blocking pile is rotary churning pile after stake, remaining rotary churning pile is rotary churning pile between stake, described
Rotary churning pile axis vertical after stake, the axis vertical of rotary churning pile or inclination between the stake；The casting area of the retaining wall is two sides
Soil blocking pile, the rotary churning pile between the soil blocking pile of two sides and front side template surround made of region.
Preferably, the diameter of all rotary churning piles is d, and when DESIGN OF RETAINING WALLS, whirl spraying pile body is equivalent to barricade by 0.8d
A part of thickness.The engineering of thickness tool in to(for) retaining wall there are certain requirements, and be with a thickness of D with retaining wall needed for certain engineering
Example, according to the present invention, then the thickness of practical retaining wall need to only be set as (D-0.8d), can according to the thickness of (D-0.8d) come
The front side template of retaining wall is set.Therefore the setting of rotary churning pile can be assisted further between retaining wall reinforcement stake in the present invention
Soil, and the construction cost of retaining wall is reduced accordingly.
Preferably, further include step (e): after retaining wall wall intensity is up to standard, being drilled with the drain hole for penetrating rotary churning pile.
Compared with prior art, the present invention having the following advantages and benefits:
1, a kind of execavated rockmass pre-reinforcement piling wall supporting construction of the present invention and method, based on pile-soil interaction it is theoretical and by
Power feature, by arc be distributed several rotary churning piles to after stake and inter-pile soil carry out pre-reinforcement, can reduce to a certain degree stake holes at
The pressure of retaining wall soil when hole plays the interim supporting and retaining system protective action of inter-pile soil after soil excavates before soil blocking pile cantilever segment stake, maximum limit
Disturbance of the excavation to inter-pile soil before reducing stake of degree, protects the intensity of inter-pile soil.Further, since inevitable vertical point of soil blocking pile
Cloth, therefore the axis that rotary churning pile after stake is arranged is also vertical, it is ensured that after stake rotary churning pile can with soil blocking pile it is whole close to, it is ensured that after stake
Rotary churning pile is to the reliable reinforcement effect of soil stabilization after stake.
2, a kind of execavated rockmass pre-reinforcement piling wall supporting construction of the present invention and method, when retaining wall is poured without vertical tested
Template only needs outside formwork erection cast-in-place, ensure that the smooth surface of alien invasion is clean and tidy, has compared to traditional front hanging breast boards fine
Visual effect.
3, a kind of execavated rockmass pre-reinforcement piling wall supporting construction of the present invention and method, rotary churning pile diameter size can be according to live feelings
Condition needs to adjust.Rotary churning pile can be as needed using vertical pile or inclination pile between stake.
Detailed description of the invention
Attached drawing described herein is used to provide to further understand the embodiment of the present invention, constitutes one of the application
Point, do not constitute the restriction to the embodiment of the present invention.In the accompanying drawings:
Fig. 1 disposes schematic diagram for breast boards in excavation soil blocking pile in the prior art；
Fig. 2 is the plan view of the specific embodiment of the invention；
Fig. 3 is schematic diagram when rotary churning pile is vertically arranged between stake in the specific embodiment of the invention；
Fig. 4 is schematic diagram when rotary churning pile is obliquely installed between stake in the specific embodiment of the invention.
Label and corresponding parts title in attached drawing:
1- soil blocking pile, rotary churning pile after 2-, rotary churning pile between 3-, 4- retaining wall, the face 5- slope, 6- soil blocking pile front hanging, outside 7-
The native line of apsides, the native line of apsides, 9- excavate datum level in 8-.
Specific embodiment
To make the objectives, technical solutions, and advantages of the present invention clearer, below with reference to embodiment and attached drawing, to this
Invention is described in further detail, and exemplary embodiment of the invention and its explanation for explaining only the invention, are not made
For limitation of the invention.
Embodiment 1:
A kind of execavated rockmass pre-reinforcement piling wall supporting construction as shown in Figure 2, including several earth-retainings being arranged in side slope
Stake 1, which is characterized in that several rotary churning piles are set along the inter-pile soil line of apsides between two neighboring soil blocking pile 1, wherein face soil blocking pile 1
The rotary churning pile of rear side is rotary churning pile 2 after stake, remaining rotary churning pile is rotary churning pile 3 between stake, 2 axis vertical of rotary churning pile after the stake, also
Including the retaining wall 4 being located between two soil blocking piles 1, the front side of the retaining wall 4 is face slope 5, the rear side of the retaining wall 4 with
Rotary churning pile 3 is adjacent between each stake.
Embodiment 2:
A kind of execavated rockmass pre-reinforcement piling wall supporting construction as shown in Figures 2 to 4 is on the basis of embodiment 1, adjacent
Rotary churning pile between two soil blocking piles 1 is parabolically distributed, and the parabolical concave surface is towards the front side of soil blocking pile 1.The stake
Between rotary churning pile 3 axis vertical or inclination: when the axis vertical of rotary churning pile 3 between stake, the trailing flank of the retaining wall 4 is also vertical
Distribution；When the axis inclination of rotary churning pile 3 between stake, the trailing flank of the retaining wall 4 also tilted, and 4 trailing flank of retaining wall is inclined
Oblique degree is identical as the axis of rotary churning pile 3 between stake.When the axis inclination of rotary churning pile 3 between stake, axis is parallel to the face slope
5.It further include the drain hole through the rotary churning pile.
The present embodiment is made of soil blocking pile, rotary churning pile, retaining wall three parts.Soil blocking pile is the stake of conventional rectangular section, is used
Hand excavation's pore-forming.It is distributed with soil blocking pile back edge in continuous N type in rotary churning pile plane, is distributed between adjacent studs along the inter-pile soil line of apsides,
Substantially parabolically.Rotary churning pile is that rotary jet grouting pipe and spray head brill are placed in a bottom design altitude using drilling machine, will be prepared in advance
After good slurries make liquid stream obtain huge energy by high-voltage generator, ejected from the nozzle high speed of slip casting tube edge,
Form the liquid stream of one energy height concentration, directly the destruction soil body, in course of injection, drilling rod is promoted in rotation, make slurries and
The soil body is thoroughly mixed, and the column induration of certain diameter is formed in soil, so that ground be made to be reinforced.
Rotary churning pile preferably uses voluntarily crawler type rotary jetting apparatus construction.Rotary churning pile is vertical sprayed construction after soil blocking pile stake, between stake
Whirl spraying stake body can be used and obliquely or vertically spray according to soil blocking pile cantilever segment height, tilt the tilt angle of rotary churning pile preferably with
Earth-retaining metope slope is identical.
Whirl spraying stake body is cement soil structure, itself can undertake certain soil pressure, can be incited somebody to action when DESIGN OF RETAINING WALLS calculates
Whirl spraying pile body is equivalent to a part of barricade thickness by 0.8d.
Piling wall system construction sequence are as follows: wall between soil excavation → stake before jet grouting pile construction → earth-retaining pile driving construction → cantilever segment stake
Construction → drain hole aperture.
Embodiment 3:
(a) 1 position of soil blocking pile is determined in side slope, the native line of apsides between two neighboring soil blocking pile 1 carries out rotary churning pile and applies
Work；
(b) soil blocking pile 1 is dug；
(c) soil body before excavation 1 cantilever segment stake of soil blocking pile；
(d) 4 front side template of retaining wall, cast-in-place retaining wall 4 are set.
The present embodiment has the following beneficial effects: compared to the prior art
(1) based on pile-soil interaction is theoretical and loading characteristic, using rotary churning pile to after stake and inter-pile soil carries out pre-reinforcement,
Retaining wall soil pressure when can reduce stake holes pore-forming to a certain degree provides the interim supporting and retaining system protection of inter-pile soil after soil excavates before cantilever segment stake
Effect, excavation disturbs inter-pile soil and protects inter-pile soil intensity before reducing stake to greatest extent.
(2) rotary churning pile setting angle is flexible, and in addition to rotary churning pile uses vertical arrangement after stake, rotary churning pile can be as needed between stake
Using vertical pile or inclination pile.Rotary churning pile diameter size can need to adjust according to field condition.
(3) retaining wall between piles are arranged close to rotary churning pile, and back side is not necessarily to shuttering, only need outside formwork erection cast-in-place, ensure that outer
The smooth surface of facade is clean and tidy, good visual effect.
Embodiment 4:
A kind of execavated rockmass pre-reinforcement piling wall method for protecting support, on the basis of embodiment 3, between two neighboring soil blocking pile 1
Rotary churning pile be parabolically distributed, the parabolical concave surface is towards the front side of soil blocking pile 1.The whirl spraying of 1 rear side of face soil blocking pile
Stake is rotary churning pile 2 after stake, remaining rotary churning pile is rotary churning pile 3 between stake, 2 axis vertical of rotary churning pile after the stake, whirl spraying between the stake
The axis vertical of stake 3 or inclination；The casting area of the retaining wall 4 is the rotation between the soil blocking pile 1 of two sides, two sides soil blocking pile 1
Region made of spray stake and front side template surround.The diameter of all rotary churning piles is d, when retaining wall 4 designs, by rotary churning pile
Body is equivalent to a part of barricade thickness by 0.8d.Further include step (e): after 4 wall intensity of retaining wall is up to standard, being drilled with and penetrate rotation
Spray the drain hole of stake.
Above-described specific embodiment has carried out further the purpose of the present invention, technical scheme and beneficial effects
It is described in detail, it should be understood that being not intended to limit the present invention the foregoing is merely a specific embodiment of the invention
Protection scope, all within the spirits and principles of the present invention, any modification, equivalent substitution, improvement and etc. done should all include
Within protection scope of the present invention.
Claims (10)
1. a kind of execavated rockmass pre-reinforcement piling wall supporting construction, including several soil blocking piles (1) being arranged in side slope, feature exists
In along several rotary churning piles of inter-pile soil line of apsides setting, the wherein rotation on rear side of face soil blocking pile (1) between two neighboring soil blocking pile (1)
Spraying stake is rotary churning pile (2), remaining rotary churning pile rotary churning pile (3) between stake after stake, and rotary churning pile (2) axis vertical, is also wrapped after the stake
The retaining wall (4) being located between two soil blocking piles (1) is included, the front side of the retaining wall (4) is face slope (5), the retaining wall (4)
Rear side and each stake between rotary churning pile (3) it is adjacent.
2. a kind of execavated rockmass pre-reinforcement piling wall supporting construction according to claim 1, which is characterized in that two neighboring gear
Rotary churning pile between native stake (1) in the horizontal plane along and the consistent curve distribution of the native line of apsides, the concave surface of the curve is towards earth-retaining
The front side of stake (1).
3. a kind of execavated rockmass pre-reinforcement piling wall supporting construction according to claim 1, which is characterized in that revolved between the stake
Spray axis vertical or the inclination of stake (3): when the axis vertical of rotary churning pile (3) between stake, the trailing flank of the retaining wall (4) is also erected
Straight distribution；When the axis inclination of rotary churning pile (3) between stake, the trailing flank of the retaining wall (4) is also tilted, and after retaining wall (4)
The inclined degree of side is identical as the axis of rotary churning pile between stake (3).
4. a kind of execavated rockmass pre-reinforcement piling wall supporting construction according to claim 3, which is characterized in that when whirl spraying between stake
When the axis inclination of stake (3), axis is parallel to the face slope (5).
5. a kind of execavated rockmass pre-reinforcement piling wall supporting construction according to claim 1, which is characterized in that further include running through
The drain hole of the rotary churning pile.
6. a kind of execavated rockmass pre-reinforcement piling wall method for protecting support, which comprises the following steps:
(a) soil blocking pile (1) position is determined in side slope, the native line of apsides between two neighboring soil blocking pile (1) carries out rotary churning pile and applies
Work；
(b) soil blocking pile (1) is dug；
(c) soil body before excavation soil blocking pile (1) cantilever segment stake；
(d) template on front side of setting retaining wall (4), cast-in-place retaining wall (4).
7. a kind of execavated rockmass pre-reinforcement piling wall method for protecting support according to claim 6, which is characterized in that two neighboring gear
Rotary churning pile between native stake (1) is parabolically distributed, front side of the parabolical concave surface towards soil blocking pile (1).
8. a kind of execavated rockmass pre-reinforcement piling wall method for protecting support according to claim 6, which is characterized in that face soil blocking pile
(1) rotary churning pile on rear side of is rotary churning pile (2), remaining rotary churning pile rotary churning pile (3) between stake after stake, rotary churning pile (2) axis after the stake
Line is vertical, the axis vertical of rotary churning pile (3) or inclination between the stake；The casting area of the retaining wall (4) is the earth-retaining of two sides
Region made of rotary churning pile and front side template between stake (1), two sides soil blocking pile (1) surround.
9. a kind of execavated rockmass pre-reinforcement piling wall method for protecting support according to claim 6, which is characterized in that all rotary churning piles
Diameter be d, when retaining wall (4) designs, whirl spraying pile body is equivalent to a part of barricade thickness by 0.8d.
10. a kind of execavated rockmass pre-reinforcement piling wall method for protecting support according to claim 6, which is characterized in that further include step
Suddenly (e): after retaining wall (4) wall intensity is up to standard, being drilled with the drain hole for penetrating rotary churning pile.
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| CN203782682U (en) * | 2014-01-23 | 2014-08-20 | 深圳市工勘岩土工程有限公司 | Guide slot assembly type pile-intermediate plate device |
| CN104863177A (en) * | 2015-06-11 | 2015-08-26 | 云南建工基础工程有限责任公司 | Composite retaining wall structure and construction method thereof |
| CN204780990U (en) * | 2015-06-11 | 2015-11-18 | 云南建工基础工程有限责任公司 | Combined type retaining wall structure |
| CN205805546U (en) * | 2016-06-13 | 2016-12-14 | 中交第一公路勘察设计研究院有限公司 | A kind of drift-sand stratum highway tunnel structure |
| CN107419729A (en) * | 2017-05-18 | 2017-12-01 | 中国建筑第八工程局有限公司 | A kind of foundation pit stope support device and method |
| CN207211165U (en) * | 2017-09-21 | 2018-04-10 | 武汉市政工程设计研究院有限责任公司 | A kind of compound antiskid piling wall retaining structure suitable for reservoir stability |
| CN109183809A (en) * | 2018-10-16 | 2019-01-11 | 北京建工国际投资有限责任公司 | A kind of construction method of Muddy Bottoms clay deep-foundation pit engineering composite support support replacement |
| CN209798771U (en) * | 2019-04-12 | 2019-12-17 | 四川省交通勘察设计研究院有限公司 | Excavation side slope pre-reinforcing pile wall supporting structure |
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