CN102021905A - Extruding-expanding device and method for pile foundation - Google Patents
Extruding-expanding device and method for pile foundation Download PDFInfo
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- CN102021905A CN102021905A CN 201010607154 CN201010607154A CN102021905A CN 102021905 A CN102021905 A CN 102021905A CN 201010607154 CN201010607154 CN 201010607154 CN 201010607154 A CN201010607154 A CN 201010607154A CN 102021905 A CN102021905 A CN 102021905A
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Abstract
The invention relates extruding-expanding device and method for a pile foundation. The device comprises a supporting device and an extruding-expanding arm connected with the supporting device, wherein the extruding-expanding arm comprises a telescopic expanding arm. The extruding-expanding device and method for the pile foundation overcome the defects of a single-cylinder one-way extruding-expanding device and a double-cylinder two-way extruding-expanding device and prevent the soil mass from falling in an arm with a box-shaped section; the telescopic extruding-expanding arm always contacts the soil mass, and the soil mass is fully compacted; the horizontally-projected area of an extruded disk cavity is larger; and the bearing capacity of an extruding-expanding pile is larger.
Description
Technical field
The present invention relates to a kind of pile foundation with extruding-spreading device and squeezed method, particularly a kind of hydraulic telescopic type extruding-spreading device and method.
Background technology
At present, in basic engineering construction, normally form the stake that has load dish, load trouble by squeezed equipment; The structure of existing extruding-spreading device is: be made up of head, Hydraulic Station control system and onboard system etc.Its head is made up of cylinder system, squeezed arm, pressure sensor etc.Squeezed arm is made up of last squeezed arm, following squeezed arm.Going up squeezed arm generally is stiffening member with following squeezed arm, is non-telescoping structure.The unidirectional squeezed equipment of wherein a kind of single cylinder, referring to Fig. 1, its upper arm AB, and underarm BC, A B the C movement locus as follows:
The A point, x=0, y=↓;
The B point, x=←, y=↓;
The C point, x=0, y=0;
As shown in drawings, when its unidirectional soil compaction, soil compaction underarm lower end is motionless, and soil compaction upper arm upper end is down moved by active force, makes two soil compaction limbs expand outwardly extrusion soil.Obviously, the soil compaction underarm has only rotation, and the soil compaction upper arm also has translation except rotating.Load dish upper wheels profile is a curve, and the bottom is a straight line.The soil compaction upper arm is similar to the extruding and the two-way soil compaction of pile peripheral earth, promptly along with the increase of the angle θ of soil compaction arm limb and vertical direction, breaks away near the soil compaction arm portion and the soil of pile body, and the brachium x that contacts with soil reduces gradually.And the work of soil compaction underarm the time only rotates, in whole soil compaction process, all keep in touch (x=L with the soil body, L is the length of soil compaction underarm), it is big that thereby the degree that makes the regolith compression of trying to get to the heart of a matter goes up soil than dish, this vertical carrying for stake is highly beneficial, in its brachium scope, big more from the distance of pile body, the compressed degree of the soil body is high more.But squeezed arm top produces " facing the dead zone " in the squeezing process,
Then the easy slump of the soil body should be located, and sediment can be increased.
Also having another kind is the two-way squeezed equipment of twin-tub, participates in Fig. 2, its upper arm AB, reaches underarm BC, A B the C movement locus as follows:
The A point, x=0, y=↓;
The B point, x=←, y=0;
The C point, x=0, y=↑;
During the two-way extruding of twin-tub,, throw off mutually with the soil body, can not play the effect of extrusion soil near underarm on the soil compaction of pile body along with the increase of the angle θ of soil compaction arm limb and vertical direction; After two-way soil compaction equipment was squeezed into dish, dish top and the bottom outline line is symmetry substantially, was that asteroid is a straightway away from pile body near pile body promptly.The compression situation of the soil body is also identical substantially about the dish, and wherein big away from the compressed degree of the soil body of pile body, load-carrying properties are good; And near the soil body of pile body, compressed degree is less relatively, and load-carrying properties are relatively poor relatively, and easily falls soil because compaction is low herein.For the stake of bearing vertical load, the dish character of the soil body down is the key factor of decision bearing capacity of single pile.During two-way extruding, along with the increase of angle, throw off mutually with the soil body near underarm on the soil compaction of pile body, the effect of extrusion soil is relatively poor relatively.
Therefore, its extruding degree to the soil body of present squeezed equipment is all not ideal enough, influences the supporting capacity of force bearing disc pile, and makes soil body slump produce sediment easily.
Summary of the invention
For the squeezed arm of the squeezed equipment that solves above-mentioned prior art breaks away from the soil body, its compaction is lower, the invention provides a kind of pile foundation with extruding-spreading device and squeezed method.
Technical scheme of the present invention is: a kind of pile foundation extruding-spreading device comprises catching device and the squeezed arm that is connected with described catching device; Its special character is: described squeezed arm comprises scalable expansion arm.
Above-mentioned scalable expansion arm comprises the first arm, second arm and hydraulic cylinder; Second arm is socketed in the first arm, and the first arm and second arm are by the hydraulic cylinder socket.
Above-mentioned hydraulic cylinder is arranged at the inner chamber of the first arm and second arm; Cylinder barrel one end of described hydraulic cylinder is connected with described the first arm, and its piston rod one end is connected with described second arm or cylinder barrel one end of hydraulic cylinder is connected with described second arm, and its piston rod one end is connected with described the first arm.
Above-mentioned second arm and catching device are hinged, and the first arm can be flexible along the outer wall of described second arm, and perhaps the first arm and catching device are hinged, and second arm can be flexible along the inwall of described the first arm.
The cross section of the above-mentioned the first arm and second arm is a box-type section, specifically is polygon or ellipse or rectangle or trapezoidal box-type section.
Above-mentioned squeezed arm also comprises non-telescoping expansion arm; One end and the described catching device of described non-telescoping expansion arm are hinged, and its other end is hinged by bearing pin and described scalable expansion arm; The other end of described scalable expansion arm is hinged by bearing pin and catching device.
Above-mentioned squeezed arm comprises flexible arm and the flexible down arm that expands of expanding; Described flexiblely expanded arm and flexible down to expand arm hinged by bearing pin; The described expansion arm that upward stretches is hinged with the top and bottom of catching device respectively with the other end of the expansion arm that stretches down.
Above-mentioned upper and lower flexible expansion arm number equates, and number is a plurality of.
Above-mentioned scalable squeezed arm also comprises slide block; Described slide block comprises first slide block and second slide block; Described first slide block is arranged on the first arm inside wall and the end that second arm is connected; Described second slide block is arranged on the end that the second arm lateral wall is connected with the first arm.
In order to solve the technical problem that prior art exists, the present invention also provides a kind of pile foundation squeezed method, and it mainly may further comprise the steps:
1) forms the pile body straight hole;
2) extruding-spreading device is stretched in the straight hole, driving extruding-spreading device stretches out its scalable expansion arm and drives itself and another scalable expansion arm or the pin joint of non-telescoping expansion arm hinged place extends out, make with the soil body of scalable expansion arm and/or non-telescoping expansion arm contact and outwards move, forms a load and branch off the chamber;
3) the scalable expansion arm of withdrawal, the scalable expansion arm and/or the non-telescoping expansion arm of rotation extruding-spreading device make other positions at its same absolute altitude place in straight hole squeezed;
4) repeating step 2) to step 3), finish the squeezed of a load dish chamber.
Above-mentioned steps 2) specifically realize by following method:
2.1) extruding-spreading device is stretched in the straight hole;
2.2) drive the hydraulic cylinder of scalable expansion arm, when the first arm of scalable expansion arm links to each other with catching device, then stretch out second arm, its second arm is extended out along the pin joint of itself and another scalable expansion arm or non-telescoping expansion arm hinged place; When second arm of scalable expansion arm links to each other with catching device, then stretch out the first arm, its first arm is extended out along the pin joint level of itself and another scalable expansion arm or non-telescoping expansion arm hinged place.
Also comprise the vertical mobile extruding-spreading device of step 5), repeating step 2 after the said method step 4)), form another load trouble chamber.
Also comprise the vertical mobile extruding-spreading device of step 6), repeating step 2 after the said method step 4)) to step 4), form the squeezed of another load dish chamber.
Pile foundation provided by the invention has following characteristics with extruding-spreading device and squeezed method:
1, pile foundation of the present invention has overcome the shortcoming of unidirectional extruding-spreading device of single cylinder and the two-way extruding-spreading device of twin-tub with extruding-spreading device, has absorbed their advantage again.Adopt hydraulic cylinder to realize that the flexible of squeezed arm and the flexible up and down arm cross section arm hinged end that expands seal, prevent that the soil body from dropping in the box-type section arm, it allows the second arm external part make sloping shape with squeezed arm the first arm in addition, is convenient to the moulding in hour indicator chamber in the soil body squeezing process.
2, the forms of motion that stretches out that stretches out the flexible squeezed arm of drive of hydraulic fluid cylinder pressure of the present invention, during work, the soil body that squeezed arm contacted up and down all is squeezed, can guarantee not fall after squeezed or minus soil at layer of sand or other soil layers, and flexible squeezed arm contacts with the soil body all the time, and the soil body obtains abundant compacting.If squeezed arm is telescopic arms up and down, can making up and down, squeezed arm hinge only moves horizontally and supreme motion down.
3, pile foundation of the present invention is strengthened with trouble chamber, the dish chamber soil body of squeezed method near pile body, and is favourable to the bearing capacity of pile foundation raising, also helps preventing to expand dropping of the arm and the soil body disengaging place soil body.The inventive method has absorbed unidirectional advantage when squeezed of single cylinder, its soil compaction underarm keeps in touch with the soil body all the time, therefore the advantage that the soil body can fully be pushed under coiling, remedied also that single cylinder is unidirectional to be gone up the problem that squeezed arm and the soil body disengage in squeezed and cause existing the problem of facing the dead zone, reduced the problem that the soil body caves in.
4, if catching device links to each other with inside and outside piston rod in the twin-tub two-way device respectively up and down, promptly this device combines with common twin-tub two-way device, compare if two-way cylinder and inside and outside piston rod equal in length with simple common twin-tub two-way device, it is bigger that squeezed method of the present invention is extruded into dish chamber horizontal projected area, and its extruded and extended pile bearing capacity is bigger.
Description of drawings
Fig. 1,2 is a squeezed arm movement locus in the prior art;
Fig. 3 is an apparatus structure schematic diagram of the present invention;
Fig. 4 .1～4.4 are squeezed arm configuration schematic diagram of the present invention;
Fig. 5 .1～5.5 are second kind of embodiment structural representation of the present invention;
Fig. 6 a, 6b are the third embodiment structural representation of the present invention;
Fig. 7 is the squeezed arm movement locus of the present invention.
Among the figure: the 1-catching device; The squeezed arm of 2-; The 3-the first arm; 4-second arm; The 5-hydraulic cylinder; The 6-slide block; 7-first slide block; 8-second slide block; The last flexible arm that expands of 9-; The flexible down arm that expands of 10-; The last tray of 11-; Tray under the 12-; The vertical hydraulic cylinder of 13-; 14-piston in hydraulic cylinder bar; 15-hydraulic cylinder outer piston bar; The non-telescoping expansion arm of 16-; The scalable expansion arm of 17-; The 18-bearing pin.
The specific embodiment
A kind of pile foundation extruding-spreading device involved in the present invention, its preferred embodiment is as follows:
First kind of embodiment
Referring to Fig. 3 and Fig. 4 .1～4.4, this device comprises catching device 1 and the squeezed arm 2 that is connected on the catching device 1; Catching device 1 of the present invention can adopt existing catching device 1 structure; And squeezed arm 2 of the present invention comprises scalable expansion arm 17; Wherein scalable expansion arm 17 comprises the first arm 3 and second arm 4; Second arm be socketed in the first arm and the first arm 3 and second arm 4 by the hydraulic cylinder socket, it realizes flexiblely by Driven by Hydraulic Cylinder, when second arm 4 and catching device 1 were hinged, the first arm 3 can stretch along the outer wall of second arm 4; Perhaps when the first arm 3 and catching device 1 were hinged, second arm 4 can be flexible along the inwall of the first arm 3.In addition, hydraulic cylinder 5 can be arranged at the inner chamber of the first arm 3 and second arm 4, its cylinder barrel one end is connected with second arm 4, its piston rod one end is connected with the first arm 3, shown in Fig. 4 .1,4.2, also can be with hydraulic cylinder 5 reverse grafts, promptly its cylinder barrel one end is connected with the first arm 3, its piston rod one end is connected with second arm 4, shown in Fig. 4 .3 and Fig. 4 .4.Be set to seal in the telescopic cavity of the present invention, it is the end sealing that the first arm 3 or second arm 4 are connected with catching device 1, and on the first arm 3 and second arm 4, slide block 6 is set, specifically be that the end that the inside wall at the first arm 3 is connected with second arm 4 is provided with first slide block 7, an end that is connected with the first arm on the lateral wall of second arm 4 is provided with second slide block 8; When telescopic arm is worked like this, come transfer function power by slide block effect and extruding.Hydraulic cylinder can be general common oil cylinder, also can be the oil cylinder or the multistage ram of band force-increasing mechanism.
Extruding-spreading device of the present invention can be provided with a plurality of squeezed arms 2, and a plurality of stretch expansion arm 9 and flexible down expansion arms 10 gone up promptly are set, and the upward flexible arm 9 that expands is connected by bearing pin 18 with the expansion arm 10 that stretches down; Going up the flexible arm 9 that expands is connected with the top and bottom of catching device 1 respectively with the down flexible other end that expands arm 10.Go up flexible expand arm 9 and the following flexible end sealing that arm 10 is connected with catching device respectively of expanding, prevent that the soil body from dropping in the arm.Go up the flexible arm 9 that expands and allow the second arm external part make sloping shape, be convenient to the moulding in hour indicator chamber in the soil body squeezing process with following flexible its first arm of arm 10 links that expands.
The cross section of the first arm 3 of the present invention and second arm 4 can be set to box-type section, the box-type section that specifically is hexagon, ellipse, octagon, rectangle, big round rectangle, trapezoidal or U-shaped etc. all can, also it can be designed to soil body contact side cross section be circular shape, the soil body is extruded into arcuation, more helps soil stabilization.
Catching device 1 of the present invention comprises tray 12 and last tray 11 down, promptly goes up the flexible arm 9 that expands and is connected on the tray 11, and the flexible down arm that expands is connected down on the tray 12.
The squeezed track of upper and lower flexible expansion arm 9,10 of the present invention such as the phase I in the accompanying drawing 7, upper arm AB, and underarm BC, A B the C movement locus as follows:
Phase I, hydraulic cylinder stretches out in the flexible expansion arm
The A point, x=0, y=0;
The B point, x=←, y=0;
The C point, x=0, y=0;
As seen in phase I of squeezed track, A, C point is motionless, because hydraulic oil is imported the hydraulic cylinder of scalable expansion arm 17, cylinder barrel or piston rod stretch out, drive the telescopic box-type section arm elongation of scalable expansion arm 17 simultaneously, because last flexible expansion arm 9 is with flexible expansion arm 10 is flexible simultaneously down, the B point along level to rectilinear motion, when the elongation of hydraulic jack reaches capacity, the elongation of scalable expansion arm 17 also reaches capacity, the B point reaches B ' point, because scalable expansion arm 17 contacts with the soil body all the time, the soil body obtains abundant compacting.Its hydraulic fluid port of hydraulic cylinder is arranged at equipment centre of form side in the flexible squeezed arm.
In squeezing process, in the scalable expansion arm 17, scalable box-type section arm is bent, and its inner hydraulic cylinder pressurized that is provided with.This extruding-spreading device has overcome the shortcoming of unidirectional extruding-spreading device of single cylinder and the two-way extruding-spreading device of twin-tub, has absorbed their advantage again.The forms of motion that stretches out that stretches out the scalable expansion arm 17 of drive of hydraulic fluid cylinder pressure, during work, upper and lower flexible expansion arm 9,10 hinges only move horizontally and supreme motion down, upper and lower flexible expansion arm 9,10 soil bodys that contacted all are squeezed, can guarantee not fall after squeezed or minus soil at layer of sand or other soil layers.
Second kind of embodiment
Only be the different of catching device 1 with the difference of first kind of embodiment, the catching device 1 in the present embodiment comprises tray 11 and following tray 12 and vertical hydraulic cylinder 13; Referring to Fig. 5 .1 to Fig. 5 .3, vertical hydraulic cylinder 13 has the piston in hydraulic cylinder of comprising bar 14 and hydraulic cylinder outer piston bar 15; Last tray 11 links to each other with hydraulic cylinder outer piston bar 15, and following tray 12 links to each other with piston in hydraulic cylinder bar 14; Inside and outside piston rod 14, the 15 close cylinder barrel sides of hydraulic cylinder all are arranged on the top of squeezed arm 2, and piston in hydraulic cylinder bar 14 is relative with the driving direction of hydraulic cylinder outer piston bar 15, and the flexible arm 9 that expands expands the further squeezed action of arm 10 with stretching down in the realization.
Referring to Fig. 5 .4a, Fig. 5 .4b, catching device comprises housing, two vertical hydraulic cylinders 13 up and down.Two vertical hydraulic cylinders 13 link to each other by housing up and down, and promptly one is arranged on squeezed arm 2 tops, and another is arranged on the below of squeezed arm 2, the connected mode of itself and squeezed arm 2 and above-mentioned similar.Referring to Fig. 5 .4a, after scalable expansion arm 17 abundant elongations reach capacity, the last tray 11 that vertical hydraulic cylinder 13 drives catching device 1 is done move toward one another with following tray 12, so the movement locus of squeezed arm 2 becomes A ' B by A B ' "; become C ' B by CB ' ", two-way squeezed identical in this part and the current techniques, the trouble chamber forms.When the hydraulic jack retraction, drive the retraction of scalable expansion arm 17 simultaneously, vertical hydraulic cylinder 13 is done opposite motion, and extruding-spreading device is squeezed to finish.Extruding-spreading device repeats reciprocal flow process, formation dish chamber through rotation.
Fig. 5 .4b goes up the expansion arm 9 that stretches with flexible expansion arm 10 and vertical up and down hydraulic cylinder 13 are hinged down, and housing is provided with the hole that can allow squeezed arm 2 stretch out.When flexible expansion arm extended length reached capacity, the some move toward one another that squeezed arm 2 is connected with catching device 1 was ordered about in vertical up and down hydraulic cylinder 13 effects, makes it further squeezed.The expanding-contracting action that expands flexible and two vertical hydraulic cylinders 13 of hydraulic cylinder in the arm that can also stretch replaces or carries out synchronously, and it is identical with above-mentioned operating principle to form load trouble chamber, and extruding-spreading device repeats reciprocal flow process, formation dish chamber through rotation.
Referring to Fig. 5 .5, catching device 1 can also be housing, vertical hydraulic cylinder 13, has the hole that can supply squeezed arm to stretch out on its housing.Go up flexible expand arm 9 and be arranged at housing in hydraulic cylinder directly link to each other, flexible down expansion arm 10 links to each other with the housing bottom.When stretching out of hydraulic cylinder in the scalable expansion arm reached capacity, this moment, vertical hydraulic cylinder 13 began to stretch, flexible expansion arm 9 and flexible down further squeezed action of expanding arm 10 in the realization.Can also make the expanding-contracting action of the flexible and vertical hydraulic cylinder 13 of hydraulic cylinder in the expansion arm that stretches replace or carry out synchronously.
The squeezed track such as the accompanying drawing 7 of upper and lower flexible expansion arm 9,10 rails of the present invention, upper arm AB, and underarm BC, A B the C movement locus as follows:
Phase I, hydraulic cylinder stretches out in the flexible expansion arm,
The A point, x=0, y=0;
The B point, x=←, y=0;
The C point, x=0, y=0;
Vertical 2 hydraulic cylinder synchronous of second stage are stretched out,
The A point, x=0, y=↓;
The B point, x=←, y=0;
The C point, x=0, y=↑;
The phase I action can the second stage action can replace or carry out synchronously.
The third embodiment
Referring to Fig. 6 a, 6b, squeezed arm 2 of the present invention can also be set to non-telescoping expansion arm 16 and be connected up and down with scalable expansion arm 17 and realize, specifically: an end and the catching device 1 of non-telescoping expansion arm 16 are hinged, and its other end is hinged by bearing pin 18 and scalable expansion arm 17; The other end of scalable expansion arm 17 is hinged by bearing pin 18 and catching device 1, can non-telescoping expansion arm 16 is hinged by bearing pin 18 with the last tray 11 of catching device 1, and scalable expansion arm 17 is hinged by bearing pin 18 with following tray 12; Otherwise also can, scalable expansion arm 17 is hinged with last tray 11 by bearing pin 18, and non-telescoping expansion arm 16 is hinged with the following tray 12 of bearing pin 18; And scalable expansion arm 17 is also hinged by bearing pin 18 with non-telescoping expansion arm 16, can rotate relatively.
The scalable expansion arm 17 of present embodiment and the structure of the scalable expansion arm 17 in first and second kind embodiment are identical.
Shown in accompanying drawing 6.a, if going up squeezed arm is scalable squeezed arm, squeezed arm is non-telescoping squeezed wall down, the tie point of going up squeezed arm and catching device by the tie point of Driven by Hydraulic Cylinder and time squeezed arm and catching device by Driven by Hydraulic Cylinder, two tie points are done the situation of move toward one another with identical speed, upper arm AB, and underarm BC, A B the C movement locus as follows:
Phase I, hydraulic cylinder stretches out in the flexible expansion arm,
The A point, x=0, y=0;
The B point, x=←, y=↓;
The C point, x=0, y=0;
Second stage, vertical 2 hydraulic cylinder synchronous are stretched out,
The A point, x=0, y=↓;
The B point, x=←, y=0;
The C point, x=0, y=↑;
The expanding-contracting action that expands the flexible and vertical hydraulic cylinder of hydraulic cylinder in the arm that can also stretch replaces or carries out synchronously.Be that the phase I action can the second stage action can replace or carry out synchronously.
Shown in accompanying drawing 6.b, if squeezed arm is scalable squeezed arm down, going up squeezed arm is non-telescoping squeezed arm, the tie point of going up squeezed arm and catching device is moved downward with certain speed by Driven by Hydraulic Cylinder, squeezed arm is connected with the catching device middle shell down, and the relative transfixion of tie point, upper arm AB, and underarm BC, A B the C movement locus as follows:
Phase I, hydraulic cylinder stretches out in the flexible expansion arm,
The A point, x=0, y=0;
The B point, x=←, y=↑;
The C point, x=0, y=0;
Second stage, vertical hydraulic cylinder stretches out,
The A point, x=0, y=↓;
The B point, x=←, y=↓;
The C point, x=0, y=0;
The expanding-contracting action that expands the flexible and vertical hydraulic cylinder of hydraulic cylinder in the arm that can also stretch replaces or carries out synchronously.Be that the phase I action can the second stage action can replace or carry out synchronously.
The present invention also provides a kind of pile foundation squeezed method, and it is mainly realized by following steps:
Step 1) forms the pile body straight hole;
Step 2) extruding-spreading device is stretched in the straight hole, driving extruding-spreading device stretches out its scalable expansion arm and drives itself and another scalable expansion arm or the pin joint of non-telescoping expansion arm hinged place extends out, make with the soil body of scalable expansion arm and/or non-telescoping expansion arm contact and outwards move, forms a load and branch off the chamber.Specifically comprise:
2.1) extruding-spreading device is stretched in the hole;
2.2) drive the hydraulic cylinder of scalable expansion arm, when the first arm of scalable expansion arm links to each other with catching device, then stretch out second arm, its second arm is extended out along the pin joint level of itself and another scalable expansion arm or non-telescoping expansion arm hinged place; When second arm of scalable expansion arm links to each other with catching device, then stretch out the first arm, its first arm is extended out along the pin joint level of itself and another scalable expansion arm or non-telescoping expansion arm hinged place.
The step 3) scalable expansion arm of withdrawing, the scalable expansion arm and/or the non-telescoping expansion arm of rotation extruding-spreading device make other positions at its same absolute altitude place in straight hole squeezed;
4) repeating step 2) to step 3), finish the squeezed of a load dish chamber.
If when same stake hole need be provided with a plurality of load dish chambeies and a plurality of troubles chamber, after step 4), also have step 5) and step 6), that is:
The vertical mobile extruding-spreading device of step 5), repeating step 2), form another load trouble chamber.
The vertical mobile extruding-spreading device of step 6), repeating step 2) to step 4), form the squeezed of another load dish chamber.
Be provided with a plurality of loads troubles chamber and the stake hole of coiling the chamber for needs, can make up above step and realize.
Claims (13)
1. a pile foundation extruding-spreading device comprises catching device and the squeezed arm that is connected with described catching device; It is characterized in that: described squeezed arm comprises scalable expansion arm.
2. pile foundation extruding-spreading device according to claim 1 is characterized in that: described scalable expansion arm comprises the first arm, second arm and hydraulic cylinder; Second arm is socketed in the first arm, and the first arm and second arm are by the hydraulic cylinder socket.
3. extruding-spreading device according to claim 2 is characterized in that: described hydraulic cylinder is arranged at the inner chamber of the first arm and second arm; Cylinder barrel one end of described hydraulic cylinder is connected with described the first arm, and its piston rod one end is connected with described second arm or cylinder barrel one end of hydraulic cylinder is connected with described second arm, and its piston rod one end is connected with described the first arm.
4. pile foundation extruding-spreading device according to claim 3, it is characterized in that: described second arm and catching device are hinged, the first arm can be flexible along the outer wall of described second arm, and perhaps the first arm and catching device are hinged, and second arm can be flexible along the inwall of described the first arm.
5. pile foundation extruding-spreading device according to claim 4 is characterized in that: the cross section of the described the first arm and second arm is a box-type section, specifically is polygon or ellipse or rectangle or trapezoidal box-type section.
6. pile foundation extruding-spreading device according to claim 5 is characterized in that: described squeezed arm also comprises non-telescoping expansion arm; One end and the described catching device of described non-telescoping expansion arm are hinged, and its other end is hinged by bearing pin and described scalable expansion arm; The other end of described scalable expansion arm is hinged by bearing pin and catching device.
7. pile foundation extruding-spreading device according to claim 5 is characterized in that: described squeezed arm comprises flexible arm and the flexible down arm that expands of expanding; Described flexiblely expanded arm and flexible down to expand arm hinged by bearing pin; The described expansion arm that upward stretches is hinged with the top and bottom of catching device respectively with the other end of the expansion arm that stretches down.
8. pile foundation extruding-spreading device according to claim 7 is characterized in that: described upper and lower flexible expansion arm number equates, and number is a plurality of.
9. according to claim 1 or 2 or 3 or 4 or 5 or 6 or 7 or 8 described pile foundation extruding-spreading devices, it is characterized in that: described scalable squeezed arm also comprises slide block; Described slide block comprises first slide block and second slide block; Described first slide block is arranged on the first arm inside wall and the end that second arm is connected; Described second slide block is arranged on the end that the second arm lateral wall is connected with the first arm.
10. squeezed method of pile foundation is characterized in that: may further comprise the steps:
1) forms the pile body straight hole;
2) extruding-spreading device is stretched in the straight hole, driving extruding-spreading device stretches out its scalable expansion arm and drives itself and another scalable expansion arm or the pin joint of non-telescoping expansion arm hinged place extends out, make with the soil body of scalable expansion arm and/or non-telescoping expansion arm contact and outwards move, forms a load and branch off the chamber;
3) the scalable expansion arm of withdrawal, the scalable expansion arm and/or the non-telescoping expansion arm of rotation extruding-spreading device make other positions at its same absolute altitude place in straight hole squeezed;
4) repeating step 2) to step 3), finish the squeezed of a load dish chamber.
11., it is characterized in that: described step 2) specifically realize by following method according to the squeezed method of right 10 described pile foundations:
2.1) extruding-spreading device is stretched in the straight hole;
2.2) drive the hydraulic cylinder of scalable expansion arm, when the first arm of scalable expansion arm links to each other with catching device, then stretch out second arm, its second arm is extended out along the pin joint of itself and another scalable expansion arm or non-telescoping expansion arm hinged place; When second arm of scalable expansion arm links to each other with catching device, then stretch out the first arm, its first arm is extended out along the pin joint level of itself and another scalable expansion arm or non-telescoping expansion arm hinged place.
12. according to the squeezed method of right 11 described pile foundations, it is characterized in that: described method step 4) also comprise the vertical mobile extruding-spreading device of step 5) afterwards, repeating step 2), form another load trouble chamber.
13. according to the squeezed method of right 11 described pile foundations, it is characterized in that: described method step 4) also comprise the vertical mobile extruding-spreading device of step 6) afterwards, repeating step 2) to step 4), form the squeezed of another load dish chamber.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102162246A (en) * | 2011-05-18 | 2011-08-24 | 中铁西北科学研究院有限公司 | Vibration-less compaction method of collapsible loess foundation |
| CN110700242A (en) * | 2019-10-24 | 2020-01-17 | 江苏科星电气有限公司 | Construction device for pile end bottom expanding of electric power engineering concrete cast-in-place pile |
| CN114673143A (en) * | 2022-03-22 | 2022-06-28 | 浙江恒炜建设集团有限公司 | Municipal soft foundation road reinforcing method |
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| CN201901872U (en) * | 2010-12-27 | 2011-07-20 | 李征 | Extruding and expanding device for pile foundation |
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| CN2258510Y (en) * | 1995-01-30 | 1997-07-30 | 苗凤阳 | Under water pipe file bottom extruding and expanding machine |
| JPH1193163A (en) * | 1997-09-19 | 1999-04-06 | Masakatsu Hiramatsu | End structure of steel pipe pile and steel pipe pile construction method using the same |
| CN1234471A (en) * | 1998-07-10 | 1999-11-10 | 贺德新 | All-intelligent multifunctional hydraulic extruding extender |
| CN2739232Y (en) * | 2004-11-05 | 2005-11-09 | 张宝成 | Pile hole extruding-reaming machine extruding-reaming arm |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102162246A (en) * | 2011-05-18 | 2011-08-24 | 中铁西北科学研究院有限公司 | Vibration-less compaction method of collapsible loess foundation |
| CN102162246B (en) * | 2011-05-18 | 2012-09-19 | 中铁西北科学研究院有限公司 | Vibration-less compaction method of collapsible loess foundation |
| CN110700242A (en) * | 2019-10-24 | 2020-01-17 | 江苏科星电气有限公司 | Construction device for pile end bottom expanding of electric power engineering concrete cast-in-place pile |
| CN114673143A (en) * | 2022-03-22 | 2022-06-28 | 浙江恒炜建设集团有限公司 | Municipal soft foundation road reinforcing method |
| CN114673143B (en) * | 2022-03-22 | 2024-04-02 | 浙江恒炜建设集团有限公司 | Municipal soft foundation road reinforcement method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102021905B (en) | 2013-06-19 |
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