CN107217679B - A kind of megalith mixture landslide micro combination pile group buttress reinforcement means - Google Patents

A kind of megalith mixture landslide micro combination pile group buttress reinforcement means Download PDF

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Publication number
CN107217679B
CN107217679B CN201710654077.4A CN201710654077A CN107217679B CN 107217679 B CN107217679 B CN 107217679B CN 201710654077 A CN201710654077 A CN 201710654077A CN 107217679 B CN107217679 B CN 107217679B
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China
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buttress
pile
landslide
mini
micro combination
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CN201710654077.4A
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Chinese (zh)
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CN107217679A (en
Inventor
殷跃平
闫金凯
王文沛
张楠
李滨
朱赛楠
魏云杰
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中国地质环境监测院
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    • EFIXED CONSTRUCTIONS
    • E02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02DFOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D17/00Excavations; Bordering of excavations; Making embankments
    • E02D17/20Securing of slopes or inclines
    • E02D17/207Securing of slopes or inclines with means incorporating sheet piles or piles

Abstract

The present invention discloses a kind of megalith mixture landslide micro combination pile group buttress reinforcement means, includes the following steps:A, the position of setting micro combination pile group buttress is determined according to landslide actual conditions and execution conditions;The combining form of micro combination pile group layout area and miniature pile group;B, the size and spacing of buttress are determined;C, Thrust of Landslide and gliding mass drag are calculated, determines the residual pushing force of setting buttress position;D, the skid resistance of buttress is calculated, determines the skid resistance that mini pile should bear;E, the area of reinforcement of mini pile in single buttress is calculated, determines the quantity of mini pile in single buttress, stake diameter and combining form;F, the anchorage depth of mini pile is calculated;G, drilling machine pore-forming hangs steel reinforcement cage, slip casting;H, stake holes is backfilled;Thrust of Landslide is resisted using the shearing resistance of micro combination pile group buttress;Prevent the megalith mixture on leading edge surface layer from deforming movement.

Description

A kind of megalith mixture landslide micro combination pile group buttress reinforcement means

Technical field

The present invention relates to a kind of megalith mixture landslide micro combination pile group buttress reinforcement means.

Background technology

Megalith mixture refers to the accumulation body being made of larger-size block of stone.Due to megalith mixture by megalith accumulate and Into, there are gap between megalith, cause common preventing land slide method in construction there are larger difficulty, as in preventing land slide often It is big to landslide disturbance there are excavation supporting difficulty is big when manually digging hole friction pile is applied to megalith mixture landslide control The shortcomings that.Therefore, a kind of Prevention Technique for being relatively suitable for megalith mixture landslide need to be explored.Megalith in megalith mixture landslide Between inlay mutually, be engaged, the shearing strength for leading to megalith mixture itself is higher, has certain self-stability, therefore megalith Mixture comes down when whole slide occurs, and is generally slided along the contact surface of megalith mixture and basement rock, and the block stone of forepart The block stone of after deformation so that the rear part has the space of amoeboid movement, can induce the deformation of rear block stone.Therefore, to this kind of cunning When slope is prevented, it should be noted that the following:First, preferably use the control method of non-excavating construction;Second is that emphasis is to Ji Fumianchu Gliding mass reinforced;Third, the megalith at leading edge position to be prevented to be locally deformed with.At present in preventing land slide, friction pile is most Common Anti-sliding stopping structure.It during anti-slide pile design, is calculated friction pile as bending resistance component, determines its cross section ruler Very little, arrangement of reinforcement etc., and carry out anti-shear check.Generally use manually digging hole-making steel reinforcement cage-concrete perfusion during construction Mode carries out.It has the following disadvantages:(1) since megalith mixture is accumulated by megalith, manually digging hole pore-forming difficulty is big, work Phase is long;(2) construction personnel is in underground construction, and there are larger security risks;(3) according to blast working during pore-forming, to gliding mass It disturbs larger;(4) larger into pore size, when pore-forming, easily reduces Landslide Stability, and landslide is promoted to slide.

Invention content

The technical problem to be solved in the present invention is to provide a kind of megalith mixture landslide micro combination pile group buttress reinforcing sides Method squeezes into more mini piles in megalith mixture, using the construction method of slip casting by mini pile and the common shape of megalith mixture Buttress near Cheng Ji clad cans resists Thrust of Landslide using the shearing resistance of micro combination pile group buttress;It is slided in megalith mixture The leading edge on slope carries out shotcrete with steel bar nets, prevents the megalith mixture on leading edge surface layer from deforming movement.

To solve the above problems, the present invention adopts the following technical scheme that:

A kind of megalith mixture landslide micro combination pile group buttress reinforcement means, includes the following steps:

A, the position of setting micro combination pile group buttress is determined according to landslide actual conditions and execution conditions;Micro combination stake The combining form of group's layout area and miniature pile group;

B, the size and spacing of buttress are determined;

C, Thrust of Landslide and gliding mass drag are calculated, determines the residual pushing force of setting buttress position;

D, the skid resistance of buttress is calculated, determines the skid resistance that mini pile should bear;

E, the area of reinforcement of mini pile in single buttress is calculated, determines the quantity of mini pile in single buttress, stake diameter and group Conjunction form;

F, the anchorage depth of mini pile is calculated;

G, drilling machine pore-forming hangs steel reinforcement cage, slip casting;

H, stake holes is backfilled;

I, shotcrete with steel bar nets and osculum construction are carried out.

Preferably, squeezing into multiple rows of mini pile in megalith mixture, mini pile is using drilling, strong arrangement of reinforcement, Cementer Skill construction small-bore bored concrete pile, due to construction when using slip casting construction method, can be by the hole between block stone in megalith mixture Gap is filled, and a certain range of mini pile and megalith mixture is made to form an entirety, i.e. micro combination pile group buttress, by It mutually inlays in the block stone of megalith mixture, be engaged, shear resistance is stronger, therefore does not consider to generate sliding surface inside megalith mixture Possibility, only certain thickness gliding mass near base clad can is reinforced, i.e., micro combination pile group buttress do not have to extend to Earth's surface, the leading edge on megalith mixture landslide carry out shotcrete with steel bar nets, prevent the block stone on leading edge surface layer from deforming movement.

Preferably, its design principle is:

Thrust of Landslide is resisted by the shearing resistance of buttress.The shearing resistance of buttress is made of two parts, first, buttress and bedrock surface Shearing resistance, first, the shearing resistance of mini pile.

Utilize τ=τsAsCalculate the shearing resistance of micro combination pile group in single buttress;Wherein, τ is miniature group in single buttress Close the shearing resistance of pile group;τsShearing strength for the longitudinal reinforcement of mini pile in single buttress;AsFor micro combination in single buttress The cross-sectional area of all longitudinal reinforcements of pile group.

Preferably, it utilizesCalculate the shearing resistance between single buttress and bedrock surface;Wherein, τ ' is Shearing resistance between single buttress and bedrock surface;G is the weight of single buttress and upper part megalith mixture;AcFor single buttress Cross-sectional area;Angle of friction between buttress and bedrock surface.

It needs to meet

In formula, K is design safety factor (DSF);T is setting buttress position per linear meter(lin.m.) residual pushing force;D is buttress center spacing.

Buttress highly can be taken as the 1/3 of thickness of sliding body, i.e. arrangement of reinforcement length of the mini pile more than sliding surface is thickness of sliding body 1/3.Mini pile can be calculated in the building-in depth of the following fixed section of sliding surface by following formula:Wherein, L1For Mini pile build-in segment length;τ is the shearing resistance of micro combination pile group in single buttress;N is the quantity of mini pile in single buttress; D is the stake diameter of mini pile;qtAdhesion strength for mini pile pile concrete and its all Rock And Soil.

Preferably, the leading edge on megalith mixture landslide carries out the measure of shotcrete with steel bar nets, set in shotcrete with steel bar nets body Osculum most descends the osculum of row preferably close to bedrock surface.

Preferably, the materials such as gravelly soil can be used during backfill stake holes, preferably gather materials on the spot, reduce cost.

Preferably, steel reinforcement cage, tendon, steel pipe, shaped steel etc. can be used in the arrangement of reinforcement of mini pile.

Preferably, shotcrete with steel bar nets can be substituted with active protecting net, setting osculum is not needed at this time.

Beneficial effects of the present invention are:(1) megalith mixture landslide is reinforced using micro combination pile group buttress, filled The antiskid performance of megalith mixture itself is waved in distribution, reduces project cost;(2) using drilling machine pore-forming when constructing, gliding mass is disturbed Small, easy for construction, degree of safety is high;(3) speed of application is fast, can quick on-slip.

Description of the drawings

Fig. 1 reinforces megalith mixture landslide sectional view for micro combination pile group buttress of the present invention;

Fig. 2 reinforces megalith mixture landslide plan view for micro combination pile group buttress of the present invention.

In figure label for:1- mini piles, 2- buttresses, 3- shotcrete with steel bar nets, 4- osculums, 5- megalith mixtures.

Specific embodiment

As depicted in figs. 1 and 2, a kind of megalith mixture landslide micro combination pile group buttress reinforcement means, mixes in megalith Multiple rows of mini pile 1 is squeezed into body 5, mini pile 1 is the small-bore bored concrete pile constructed using drilling, strong arrangement of reinforcement, grouting process, due to Using the construction method of slip casting during construction, the hole between block stone in megalith mixture 5 can be filled, made a certain range of Mini pile 1 and megalith mixture 5 form an entirety, i.e. micro combination pile group buttress 2, play the role of reinforcing landslide.Due to The block stone of megalith mixture 5 is mutually inlayed, is engaged, and shear resistance is stronger, therefore does not consider that 5 inside of megalith mixture generates sliding surface Possibility, only certain thickness gliding mass near base clad can is reinforced, i.e., micro combination pile group buttress do not have to extend to Reinforcing bar and concrete material is greatly saved in earth's surface in this way, reduces cost.Meanwhile megalith mixture 5 come down leading edge into Row shotcrete with steel bar nets 3 prevents the block stone on leading edge surface layer from deforming movement.

Micro combination pile group buttress of the present invention reinforces the design principle on megalith mixture landslide:

Thrust of Landslide is resisted by the shearing resistance of buttress.The shearing resistance of buttress is made of two parts, first, buttress and bedrock surface Shearing resistance, first, the shearing resistance of mini pile.

Utilize τ=τsAsCalculate the shearing resistance of micro combination pile group in single buttress;Wherein, τ is miniature group in single buttress Close the shearing resistance of pile group;τsShearing strength for the longitudinal reinforcement of mini pile in single buttress;AsFor micro combination in single buttress The cross-sectional area of all longitudinal reinforcements of pile group.

It utilizesCalculate the shearing resistance between single buttress and bedrock surface;Wherein, τ ' is single buttress Shearing resistance between bedrock surface;G is the weight of single buttress and upper part megalith mixture 5;AcCross section for single buttress Product;Angle of friction between buttress and bedrock surface.

It needs to meet

In formula, K is design safety factor (DSF);T is setting buttress position per linear meter(lin.m.) residual pushing force;D is buttress center spacing.

Buttress highly can be taken as the 1/3 of thickness of sliding body, i.e. arrangement of reinforcement length of the mini pile more than sliding surface is thickness of sliding body 1/3.Mini pile can be calculated in the building-in depth of the following fixed section of sliding surface by following formula:Wherein, L1For Mini pile build-in segment length;τ is the shearing resistance of micro combination pile group in single buttress;N is the quantity of mini pile in single buttress; D is the stake diameter of mini pile;qtAdhesion strength for mini pile pile concrete and its all Rock And Soil.

Block stone to prevent leading edge surface layer deforms, and the leading edge on megalith mixture landslide carries out arranging for shotcrete with steel bar nets 3 It applies.The design and construction of specific shotcrete with steel bar nets 3 can be determined that the present invention does not limit the specific reality of shotcrete with steel bar nets 3 by relevant regulations Applying method.Simultaneously for the water in slip mass is made to discharge in time, osculum 4 in shotcrete with steel bar nets body is set, most descends the osculum 4 of row Preferably close to bedrock surface (sliding surface), the quantity of specific osculum and aperture size can according to local rainfall size with reference to related Regulation determines.

The present invention implementation steps be:

A, the position of setting micro combination pile group buttress is determined according to landslide actual conditions and execution conditions;Micro combination stake The combining form of group's layout area and miniature pile group;

B, the size and spacing of buttress are determined;

C, Thrust of Landslide and gliding mass drag are calculated, determines the residual pushing force of setting buttress position;

D, the skid resistance of buttress is calculated, determines the skid resistance that mini pile should bear;

E, the area of reinforcement of mini pile in single buttress is calculated, determines the quantity of mini pile in single buttress, stake diameter and group Conjunction form;

F, the anchorage depth of mini pile is calculated;

G, drilling machine pore-forming hangs steel reinforcement cage, slip casting;

H, stake holes is backfilled.

I, shotcrete with steel bar nets and osculum construction are carried out.

Using micro combination pile group is set in megalith mixture, slurry when passing through slip casting fills the sky of megalith mixture Gap so as to form micro combination pile group buttress, gives full play to the antiskid performance of megalith mixture itself, reduces project cost, and It can realize quick on-slip;

By the measure for the leading edge progress shotcrete with steel bar nets that comes down in megalith mixture, prevent the deformation of localized mass stone from inducing rear portion huge The a wide range of unstability of rock mixture, and take into account drainage measure.

The above description is merely a specific embodiment, but protection scope of the present invention is not limited thereto, any The change or replacement expected without creative work, should be covered by the protection scope of the present invention.

Claims (2)

  1. The micro combination pile group buttress reinforcement means 1. a kind of megalith mixture comes down, it is characterised in that:Include the following steps:
    A, the position of setting micro combination pile group buttress is determined according to landslide actual conditions and execution conditions;Micro combination pile group cloth Put the combining form of region and miniature pile group;
    B, the size and spacing of buttress are determined;
    C, Thrust of Landslide and gliding mass drag are calculated, determines the residual pushing force of setting buttress position;
    D, the skid resistance of buttress is calculated, determines the skid resistance that mini pile should bear;
    E, the area of reinforcement of mini pile in single buttress is calculated, determines the quantity of mini pile in single buttress, stake diameter and combination shape Formula;
    F, the anchorage depth of mini pile is calculated;
    G, drilling machine pore-forming hangs steel reinforcement cage, slip casting;
    H, stake holes is backfilled;
    I, shotcrete with steel bar nets and osculum construction are carried out;
    A mini pile more than row is squeezed into megalith mixture, mini pile is constructed using drilling, strong arrangement of reinforcement, grouting process Small-bore bored concrete pile, due to construction when using slip casting construction method, the hole between block stone in megalith mixture can be filled It fills out, a certain range of mini pile and megalith mixture is made to form an entirety, i.e. micro combination pile group buttress, since megalith mixes Fit block stone is mutually inlayed, is engaged, and shear resistance is stronger, therefore does not consider to generate the possibility of sliding surface inside megalith mixture, Only certain thickness gliding mass near base clad can be reinforced, i.e., micro combination pile group buttress does not have to extend to earth's surface, The leading edge on megalith mixture landslide carries out shotcrete with steel bar nets, prevents the block stone on leading edge surface layer from deforming movement;
    Its design principle is:
    Thrust of Landslide is resisted by the shearing resistance of buttress, and the shearing resistance of buttress is made of two parts, first, buttress and bedrock surface is anti- Shearing, first, the shearing resistance of mini pile;
    Utilize τ=τsAsCalculate the shearing resistance of micro combination pile group in single buttress;Wherein, τ is micro combination stake in single buttress The shearing resistance of group;τsShearing strength for the longitudinal reinforcement of mini pile in single buttress;AsFor micro combination pile group in single buttress The cross-sectional area of all longitudinal reinforcements;
    It utilizesCalculate the shearing resistance between single buttress and bedrock surface;Wherein, τ ' is single buttress and base Shearing resistance between scar;G is the weight of single buttress and upper part megalith mixture;AcCross-sectional area for single buttress;For Angle of friction between buttress and bedrock surface;
    It needs to meet
    In formula, K is design safety factor (DSF);T is setting buttress position per linear meter(lin.m.) residual pushing force;D is buttress center spacing;
    Buttress highly takes the 1/3 of thickness of sliding body, i.e. arrangement of reinforcement length of the mini pile more than sliding surface is the 1/3 of thickness of sliding body;It is miniature Stake is calculated in the building-in depth of the following fixed section of sliding surface by following formula:Wherein, L1For mini pile build-in Segment length;τ is the shearing resistance of micro combination pile group in single buttress;N is the quantity of mini pile in single buttress;D is mini pile Stake diameter;qtAdhesion strength for mini pile pile concrete and its all Rock And Soil.
  2. The micro combination pile group buttress reinforcement means 2. megalith mixture as described in claim 1 comes down, it is characterised in that:Huge The leading edge on rock mixture landslide carries out the measure of shotcrete with steel bar nets, and osculum is set in shotcrete with steel bar nets body, most descends the osculum of row Close to bedrock surface.
CN201710654077.4A 2017-08-02 2017-08-02 A kind of megalith mixture landslide micro combination pile group buttress reinforcement means CN107217679B (en)

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101220597A (en) * 2008-01-31 2008-07-16 中铁二院工程集团有限责任公司 Skid resistant composite structure of miniature pile and method for reinforcing side slope
CN102493464A (en) * 2011-11-23 2012-06-13 中国地质科学院地质力学研究所 Landslide control method based on micropile groups
CN204456145U (en) * 2015-02-22 2015-07-08 中国地质环境监测院 Flush type micro combination pile group
CN205712144U (en) * 2016-06-13 2016-11-23 贵州正业工程技术投资有限公司 A kind of karst talus anchor pole reinforcement retaining structure
CN106245629A (en) * 2016-09-13 2016-12-21 大连理工大学 A kind of anti-skid uplift pile in mountain area and method for designing thereof
CN206233249U (en) * 2016-07-01 2017-06-09 深圳市金世纪工程实业有限公司 Complicated precipitous precipice depth side slope comprehensive support structure

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4316941B2 (en) * 2003-06-20 2009-08-19 株式会社大林組 Masonry wall reinforcement method

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101220597A (en) * 2008-01-31 2008-07-16 中铁二院工程集团有限责任公司 Skid resistant composite structure of miniature pile and method for reinforcing side slope
CN102493464A (en) * 2011-11-23 2012-06-13 中国地质科学院地质力学研究所 Landslide control method based on micropile groups
CN204456145U (en) * 2015-02-22 2015-07-08 中国地质环境监测院 Flush type micro combination pile group
CN205712144U (en) * 2016-06-13 2016-11-23 贵州正业工程技术投资有限公司 A kind of karst talus anchor pole reinforcement retaining structure
CN206233249U (en) * 2016-07-01 2017-06-09 深圳市金世纪工程实业有限公司 Complicated precipitous precipice depth side slope comprehensive support structure
CN106245629A (en) * 2016-09-13 2016-12-21 大连理工大学 A kind of anti-skid uplift pile in mountain area and method for designing thereof

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