CN104120714B - The construction method of hand excavated pile - Google Patents

The construction method of hand excavated pile Download PDF

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Publication number
CN104120714B
CN104120714B CN201410359761.6A CN201410359761A CN104120714B CN 104120714 B CN104120714 B CN 104120714B CN 201410359761 A CN201410359761 A CN 201410359761A CN 104120714 B CN104120714 B CN 104120714B
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main body
enlarged footing
wing plate
hand excavated
excavated pile
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CN104120714A (en
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梁兴
蔺靖华
严居斌
华聪
李宇
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Become Capital Electricity Power Engineering Design Co Ltd
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Become Capital Electricity Power Engineering Design Co Ltd
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Abstract

Hand excavated pile provided by the invention, relate to power engineering field, comprise main body and wing plate, described main body is column, one end of described main body is provided with at least two wing plates, described wing plate is arranged on the sidewall of described main body, the end face of described wing plate and the end face of described main body, and described wing plate extends along the length direction of described main body.The beneficial effect of the construction method of hand excavated pile provided by the invention and hand excavated pile be the reduction of hand excavated pile diameter and buried depth, save structural meterials.

Description

The construction method of hand excavated pile
Technical field
The present invention relates to power engineering field, in particular to a kind of construction method of hand excavated pile.
Background technology
One of foundation pattern that common hand excavated pile is mountain area, hilly ground iron tower of power transmission line is conventional.The type basis belongs to raw fly ash, does not adopt heavy excavation, but adopts concrete guard wall supporting, then manually draws and digs to design buried depth, finally with soil for mould basis of formation physical dimension model, descending reinforcing cage concreting is shaping.
The top earth resistance of the hand excavated pile of raw fly ash is less, is easily subject to the interference of horizontal force, produces larger moment of flexure, causes hand excavated pile top that larger displacement occurs.For this reason, the diameter of increase hand excavated pile of having to and buried depth to improve the crystallized ability of ground to hand excavated pile, and then reduce the displacement on hand excavated pile top.
Summary of the invention
The object of the present invention is to provide a kind of construction method of hand excavated pile, to solve the above problems.
Hand excavated pile provided by the invention, comprise main body and wing plate, described main body is the column comprising two ends and a sidewall, one end of described main body is provided with the wing plate of at least two, described wing plate is arranged on the sidewall of described main body, the end face of described wing plate and the end face of described main body, described wing plate extends along the length direction of described main body.
Wing plate is arranged on one end of main body, and at least two identical wing plates are arranged on one end of described main body, and the end face of wing plate and the end face of main body simultaneously wing plate extend along the length direction of main body, and namely wing plate radial direction is extended on the sidewall of one end of main body.
Hand excavated pile as above, preferably, described main body is cylinder, and described wing plate is rectangular slab, and the width of described wing plate is 1-2 times of main diameter.The value of general width is 1-2 times of main diameter, and the value of this scope can provide enough passive earth pressures, can not waste too much material simultaneously.
Hand excavated pile as above, preferably, the length of described wing plate equals the width of described wing plate.The length of wing plate is identical with width, and the shape of described wing plate is square, and the passive earth pressure that this foursquare wing plate is subject to is more even, makes the top of hand excavated pile more stable.
Hand excavated pile as above, preferably, also comprises reinforcing cage, and described reinforcing cage is embedded in described main body and described wing plate, and the reinforcing cage in the reinforcing cage in described wing plate and described main body intersects.Reinforcing cage in wing plate and the reinforcing cage in main body intersect the bonding strength that can improve wing plate and main body, make the combination of wing plate and main body more firm.
Hand excavated pile as above, preferably, also comprise the first enlarged footing, described first enlarged footing is arranged on the other end of described main body away from described wing plate, described first enlarged footing extend out the outer profile size that size is greater than described main body, described enlarged footing end face is lower arcuate surface.Utilize the enlarged footing of the first enlarged footing lower arcuate surface can improve the foundation bearing capacity of hand excavated pile further.
Hand excavated pile as above, preferably, also comprise at least one second enlarged footing, described second enlarged footing is arranged between the two ends of described main body, described second enlarged footing extend out the outer profile size that size is greater than described main body, described second enlarged footing is frustum.Because the impact of single enlarged footing is only confined in the scope of diameter 4 ~ 10 times of more than enlarged footing, vertical bearing capacity of single pile is limited.Adopt multiple tracks enlarged footing, be all subject to the impact of enlarged footing like this in the buried depth scope of whole manually digging hole post, reduce the diameter of hand excavated pile further.
Hand excavated pile as above, preferably, described second enlarged footing is arranged on the middle part of described main body, and the diameter of described second enlarged footing is identical with the diameter of described first enlarged footing.After arranging two enlarged footing, the vertical bearing capacity of stake can be greatly improved, thus can reduce pile body diameter or buried depth, thus saves structural meterials consumption, has certain technology and economy comparison advantage.
The present invention also provides the construction method of hand excavated pile described in more than one, comprises step:
Ground is drawn the model digging body top;
The model digging wing plate is drawn in the Liang Ge side, top of main body;
The second enlarged footing is excavated at the waist of main body;
Below the second enlarged footing, continue to draw the lower model of digging main body;
The first enlarged footing is excavated in the bottom of main body;
In the model of the model and wing plate of drawing the main body of digging, place reinforcing cage, first in the model of main body, place reinforcing cage, then in the model of wing plate, place reinforcing cage;
Packing material is added in the model of main body and in the model of wing plate.
Adopt this construction method high efficiencyly can complete the construction of hand excavated pile.
The construction method of hand excavated pile as above, preferably, described enlarged footing is two, described first enlarged footing and described second enlarged footing expand measure-alike, described on ground, draw the model digging main body before, also comprise according to single manually digging hole pile vertical carrying capacity, calculate the large-sized value of expansion of the main body of single hand excavated pile, the first enlarged footing and the second enlarged footing.The value of the diameter, buried depth etc. of the first enlarged footing calculated, the expansion size of the second enlarged footing and main body, more meets the requirement of construction, can meet strength demand.
The construction method of hand excavated pile as above, preferably, described main body is cylinder, utilizes formula Q uk=u Σ ψ siq sikl si+ ψ p1q pk1a p1+ ψ p2q pk2a p2carry out the large-sized exploitation of expansion of the main body of described single hand excavated pile, the first enlarged footing and the second enlarged footing, wherein,
Q ukfor vertical ultimate bearing capacity of single pile standard value;
U is hand excavated pile perimeter of section;
ψ silarge diameter pile side resistance coefficient, experience value;
Q sikthe ultimate frictional resistance standard value that stake i-th layer, side is native, experience value;
L sithe buried depth of hand excavated pile, experience value;
ψ p1first expands head end resistance dimensions effect coefficient, experience value;
Q pk1the standard ultimate bearing capacity of the first enlarged footing, experience value;
A p1the end stake area of the first enlarged footing;
ψ p2second expands head end resistance dimensions effect coefficient, experience value;
Q pk2the standard ultimate bearing capacity of the second enlarged footing, experience value;
A p2the end stake area of the second enlarged footing;
Single hand excavated pile vertical applied force is brought into the vertical ultimate bearing capacity of single pile standard value in formula, then draw the expansion size span of the main diameter of single hand excavated pile, the first enlarged footing and the second enlarged footing.Utilize formula, the diameter span of main diameter, buried depth, the first enlarged footing and the second enlarged footing can be calculated quickly and accurately.
The beneficial effect of the construction method of hand excavated pile provided by the invention and hand excavated pile is, wing plate is set up by the one end at hand excavated pile, wing plate is arranged on the outside of main body, the bearing of trend of wing plate is the axis direction along main body, utilize wing plate, expand the contact area of hand excavated pile and ground, add the passive earth pressure on hand excavated pile top, reduce the horizontal force on hand excavated pile top, and then the moment of flexure that reduction hand excavated pile top is subject to, finally decrease the horizontal movement on hand excavated pile top, consequently reduce diameter and the buried depth of hand excavated pile simultaneously, save structural meterials.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of the hand excavated pile that first embodiment of the invention provides;
Fig. 2 is the schematic diagram of the hand excavated pile that second embodiment of the invention provides.
Detailed description of the invention
Also by reference to the accompanying drawings the present invention is described in further detail below by specific embodiment.
Fig. 1 is the hand excavated pile that first embodiment of the invention provides, as shown in Figure 1, the hand excavated pile that first embodiment of the invention provides comprises main body 1 and wing plate 2, main body 1 is the cylinder comprising two ends and a sidewall, one end of main body 1 is provided with the wing plate 2 of two identical rectangles, the wing plate 2 of rectangle is arranged on the sidewall of main body 1, the end face of wing plate 2 and the end face of main body 1, and wing plate 2 extends along the axis direction of main body 1.
Wing plate 2 is arranged on one end of main body 1, two identical wing plates 2 are arranged on one end of main body 1, the end face of the end face of wing plate 2 and one end of main body 1 simultaneously wing plate 2 extends along the axis of main body 1, and namely wing plate 2 radial direction is extended on the sidewall of one end of main body 1.Setting up of wing plate 2, mounted hand excavated pile is made to utilize ground to the clamping of wing plate 2, add the contact area of manually digging hole post top and ground, improve the passive earth pressure on hand excavated pile top, thus reduce the maximal bending moment that top is subject to, correspondingly reduce the horizontal movement on hand excavated pile top.So just not needing the buried depth of the diameter by increasing hand excavated pile or increase hand excavated pile to reduce the horizontal movement on hand excavated pile top, saving construction cost and material cost.
Fig. 2 is the hand excavated pile that second embodiment of the invention provides, and as shown in Figure 2, the hand excavated pile that second embodiment of the invention provides comprises main body 1 and wing plate 2, and main body 1 is the column comprising two ends and a sidewall, and column is cylinder.One end of main body 1 is provided with the wing plate 2 of at least two identical rectangles, and the wing plate 2 of rectangle is arranged on the sidewall of main body 1, and the end face of wing plate 2 and the end face of main body 1, wing plate 2 is along the Axis Extension of main body 1.
Further, the width of single rectangle wing plate 2 is 1.5 times of main body 1 diameter.The value that the width of wing plate and wing plate 2 extend in the diametric(al) of main body 1, the length of wing plate 2 equals the width of wing plate 2, and the length of wing plate 2 is the value that wing plate 2 extends at the axis direction of main body 1.The value of width is 1-2 times of main body 1 diameter, and the value of this scope can provide enough passive earth pressures, can not waste too much material simultaneously.
Simultaneously in hand excavated pile, also comprise reinforcing cage, reinforcing cage is embedded in main body 1 and wing plate 2, and the reinforcing cage in the reinforcing cage in wing plate 2 and main body 1 intersects.Reinforcing cage in reinforcing cage in wing plate 2 and main body 1 intersects the bonding strength that can improve wing plate 2 and main body 1, makes the combination of wing plate 2 and main body 1 more firm.
In the present embodiment, also comprise the first enlarged footing 3 and second enlarged footing 4, first enlarged footing 3 is arranged on the other end of main body 1 away from wing plate 2, the first enlarged footing 3 extend out the diameter that size is greater than main body 1, enlarged footing end face is lower arcuate surface.Second enlarged footing 4 is arranged between the two ends of main body 1, the second enlarged footing 4 extend out the diameter that size is greater than main body 1, the diameter of the second enlarged footing 4 is identical with the diameter of the first enlarged footing 3, and the second enlarged footing 4 is frustum.
First enlarged footing 3 is greater than the diameter of main body 1 owing to extending out size, when hand excavated pile is embedded in ground, the first enlarged footing 3 stretches in soil, can improve the basic supporting capacity of hand excavated pile.But, in power engineering, the buried depth of the hand excavated pile that some bearing loads are larger is all larger, draw ratio is sometimes more than ten to one simultaneously, according to the calculating of the sphere of action to enlarged footing, the part of enlarged footing can only improve enlarged footing the vertical bearing capacity of nigh hand excavated pile bottom.For the anti-pulling capacity expanding end uplift pile, the anti-pulling capacity failure mode of expanded bore pile becomes with the angle of internal friction size of soil, and angle of internal friction is larger, and the destruction cylinder affected by the expansion end is longer.Expand the above length in the end to be about within the scope of 4 ~ 10 times of diameter, the column diameter that breaks just increases to bellout diameter D; Exceed this scope with upper part, the plane of fracture is contracted to a Soil Interface.The length that the Beneficial Effect of the first namely general enlarged footing 3 is only confined to more than one end of installation first enlarged footing 3 of hand excavated pile is in diameter 4-10 scope doubly, single the first enlarged footing 3 being arranged on one end is limited for the raising of vertical bearing capacity, therefore can consider to arrange one enlarged footing again at the waist of pile body, multiple tracks enlarged footing is even set, the impact of enlarged footing is all subject to like this in the buried depth scope of whole stake, when calculating anti-pulling capacity during pile body girth, just can all by u=π D calculate (u is girth, D is enlarged footing diameter), with less cost, greatly improve anti-pulling capacity.In addition, arrange together after the second enlarged footing 4 at the waist of pile body, be equivalent to add a chuck at pile body waist, that can improve the side of hand excavated pile with drag that is ground, reduce the displacement at pile top of hand excavated pile, improve the pile body stiffness of hand excavated pile.After arranging two enlarged footing, the vertical bearing capacity of stake can be greatly improved, thus can reduce diameter or the buried depth of the shaft of main body 1, thus saves structural meterials consumption, has certain technology and economy comparison advantage.
Two enlarged footing hand excavated pile is when constructing; should be specifically noted that the verticality in the hole, hole of the first enlarged footing 3 and the second enlarged footing 4; hole, two sections hole should accurate centering; the diameter of borehole should strictly control; to ensure that reinforcing cage can hoisted in position smoothly, and to ensure that the topping of reinforcing bar meets designing requirement.First enlarged footing 3 and the second enlarged footing 4 should be drawn in strict accordance with the gradient of drawing requirement when constructing and dig, and angle of inclination must not be greater than 45 °, before lifting reinforcing cage should clearly the end clean.To when drawing the basic hole concreting of ground of the hand excavated pile dug, should build successively from bottom to top, vibration compacting, paying special attention to enlarged footing place should build closely knit, must not defect be left, ultrasonic wave test tube should be buried underground if desired, to detect manually digging hole pile integrity.
A construction method for the hand excavated pile that second embodiment provides, comprises step:
According to single manually digging hole pile vertical carrying capacity, calculate the value of main body 1, first enlarged footing 3 of single hand excavated pile and the diameter of the second enlarged footing 4;
Ground is drawn the model digging body top;
The model digging wing plate is drawn in the upper outside face of main body;
The second enlarged footing is excavated at the waist of main body;
Below the second enlarged footing, continue to draw the lower model of digging main body;
The first enlarged footing is excavated in the bottom of main body;
In the model of the model and wing plate of drawing the main body of digging, place reinforcing cage, first in the model of main body, place reinforcing cage, then in the model of wing plate, place reinforcing cage;
Packing material is added in the model of main body and in the model of wing plate.
Utilize formula Q uk=u Σ ψ siq sikl si+ ψ p1q pk1a p1+ ψ p2q pk2a p2carry out the exploitation of the diameter of the main body of described single hand excavated pile, the first enlarged footing 3 and the second enlarged footing 4, wherein,
Q ukfor vertical ultimate bearing capacity of single pile standard value;
U is hand excavated pile perimeter of section;
ψ sifor large diameter pile side resistance coefficient, experience value;
Q sikfor the ultimate frictional resistance standard value that i-th layer, stake side is native, experience value;
L sifor the buried depth of hand excavated pile, experience value;
ψ p1be the first enlarged footing 3 end resistance dimensions effect coefficient, experience value;
Q pk1be the standard ultimate bearing capacity of the first enlarged footing 3, experience value;
A p1it is the end stake area of the first enlarged footing 3;
ψ p2be the second enlarged footing 4 end resistance dimensions effect coefficient, experience value;
Q pk2be the standard ultimate bearing capacity of the second enlarged footing 4, experience value;
A p2it is the end stake area of the second enlarged footing 4;
Single hand excavated pile vertical applied force is brought into the vertical ultimate bearing capacity of single pile standard value in formula, then draw the first enlarged footing 3 of single hand excavated pile and the diameter span of the second enlarged footing 4.Utilize formula, the diameter span of the diameter of main body 1, the first enlarged footing 3 and the second enlarged footing 4 can be calculated quickly and accurately.
Two enlarged footing hand excavated pile is when constructing; should be specifically noted that the verticality in the hole, hole of the first enlarged footing 3 and the second enlarged footing 4; hole, two sections hole should accurate centering; the diameter of borehole should strictly control; to ensure that reinforcing cage can hoisted in position smoothly, and ensure that the topping of reinforcing bar meets designing requirement.First enlarged footing 3 and the second enlarged footing 4 should be drawn in strict accordance with the gradient of drawing requirement when constructing and dig, and angle of inclination must not be greater than 45 °, before lifting reinforcing cage should clearly the end clean.To when drawing ground empty of the hand excavated pile dug, should build successively from bottom to top during concreting, vibration compacting, paying special attention to enlarged footing place should build closely knit, must not defect be left, ultrasonic wave test tube should be buried underground if desired, to detect manually digging hole pile integrity.
In the present invention, the shape of the column of main body 1 is not limited to cylinder, rectangular column or triangular prism etc., and the shape of wing plate 2 is not limited to the wing plate of other shapes such as rectangle, triangle.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.

Claims (7)

1. the construction method of a hand excavated pile, described hand excavated pile comprises main body and wing plate, described main body is column, one end of described main body is provided with at least two wing plates, described wing plate is arranged on the sidewall of described main body, the end face of described wing plate and the end face of described main body, described wing plate extends along the length direction of described main body
Described hand excavated pile also comprises the first enlarged footing, and described first enlarged footing is arranged on the other end of described main body away from described wing plate, described first enlarged footing extend out the outer profile size that size is greater than described main body, described enlarged footing end face is lower arcuate surface,
Described hand excavated pile also comprises at least one second enlarged footing, and described second enlarged footing is arranged between the two ends of described main body, described second enlarged footing extend out the outer profile size that size is greater than described main body, described second enlarged footing is frustum,
It is characterized in that, comprise step:
Ground is drawn the model digging body top;
The model digging wing plate is drawn in the upper outside face of main body;
The second enlarged footing is excavated at the waist of main body;
Below the second enlarged footing, continue to draw the lower model of digging main body;
The first enlarged footing is excavated in the bottom of the bottom of main body;
In the model of the model and wing plate of drawing the main body of digging, place reinforcing cage, first in the model of main body, place reinforcing cage, then in the model of wing plate, place reinforcing cage;
Packing material is added in the model of main body and in the model of wing plate.
2. the construction method of hand excavated pile according to claim 1, is characterized in that, described wing plate is rectangular slab, and the width of described wing plate is 1-2 times of main diameter.
3. the construction method of hand excavated pile according to claim 2, is characterized in that, the length of described wing plate equals the width of described wing plate.
4. the construction method of hand excavated pile according to claim 1, is characterized in that, also comprises reinforcing cage, and described reinforcing cage is embedded in described main body and described wing plate, and the reinforcing cage in the reinforcing cage in described wing plate and described main body intersects.
5. the construction method of hand excavated pile according to claim 1, is characterized in that, described second enlarged footing is arranged on the middle part of described main body, described second enlarged footing extend out the outer profile size that size is greater than described main body.
6. the construction method of hand excavated pile according to claim 1, it is characterized in that, described enlarged footing is two, described first enlarged footing and described second enlarged footing expand measure-alike, described on ground, draw the model digging main body before, also comprise according to single manually digging hole pile vertical carrying capacity, calculate the large-sized value of expansion of the main body of single hand excavated pile, the first enlarged footing and the second enlarged footing.
7. the construction method of hand excavated pile according to claim 6, is characterized in that, described main body is cylinder, utilizes formula Q uk=u Σ ψ siq sikl si+ ψ p1q pk1a p1+ ψ p2q pk2a p2carry out the large-sized exploitation of expansion of the main body of described single hand excavated pile, the first enlarged footing and the second enlarged footing, wherein,
Q ukfor vertical ultimate bearing capacity of single pile standard value;
U is hand excavated pile perimeter of section;
ψ silarge diameter pile side resistance coefficient, experience value;
Q sikthe ultimate frictional resistance standard value that stake i-th layer, side is native, experience value;
L sithe buried depth of hand excavated pile, experience value;
ψ p1first expands head end resistance dimensions effect coefficient, experience value;
Q pk1the standard ultimate bearing capacity of the first enlarged footing, experience value;
A p1the end stake area of the first enlarged footing;
ψ p2second expands head end resistance dimensions effect coefficient, experience value;
Q pk2the standard ultimate bearing capacity of the second enlarged footing, experience value;
A p2the end stake area of the second enlarged footing;
Single hand excavated pile vertical applied force is brought into the vertical ultimate bearing capacity of single pile standard value in formula, then draw the expansion size span of the main diameter of single hand excavated pile, the first enlarged footing and the second enlarged footing.
CN201410359761.6A 2014-07-25 2014-07-25 The construction method of hand excavated pile Active CN104120714B (en)

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Publication number Priority date Publication date Assignee Title
CN111485572A (en) * 2020-03-17 2020-08-04 中国电力工程顾问集团西北电力设计院有限公司 Construction method of prefabricated root key type wing plate foundation

Citations (6)

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Publication number Priority date Publication date Assignee Title
CN1115347A (en) * 1995-06-23 1996-01-24 西诺国际顾问(武汉)有限公司 Wing disk-shape concrete casting pile and its operation method
JP2005163348A (en) * 2003-12-02 2005-06-23 Railway Technical Res Inst Steel-made driving pipe steel material, steel-made driving pile and construction method of seel-made driving pipe
CN1869338A (en) * 2005-12-02 2006-11-29 郑百翔 Manhole pile enlarged foot and its safety construction method
KR100963320B1 (en) * 2009-11-13 2010-06-11 김성수 Vertical support and frictional reinforcement structural advanced pile
CN103266602A (en) * 2013-05-15 2013-08-28 南京工程学院 Diameter-expanding pile for manual hole digging and construction method thereof
CN203960852U (en) * 2014-07-25 2014-11-26 成都城电电力工程设计有限公司 Hand excavated pile

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1115347A (en) * 1995-06-23 1996-01-24 西诺国际顾问(武汉)有限公司 Wing disk-shape concrete casting pile and its operation method
JP2005163348A (en) * 2003-12-02 2005-06-23 Railway Technical Res Inst Steel-made driving pipe steel material, steel-made driving pile and construction method of seel-made driving pipe
CN1869338A (en) * 2005-12-02 2006-11-29 郑百翔 Manhole pile enlarged foot and its safety construction method
KR100963320B1 (en) * 2009-11-13 2010-06-11 김성수 Vertical support and frictional reinforcement structural advanced pile
CN103266602A (en) * 2013-05-15 2013-08-28 南京工程学院 Diameter-expanding pile for manual hole digging and construction method thereof
CN203960852U (en) * 2014-07-25 2014-11-26 成都城电电力工程设计有限公司 Hand excavated pile

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