CS217451B1 - Method of and apparatus for testing on-the spot made piles - Google Patents

Method of and apparatus for testing on-the spot made piles Download PDF

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Publication number
CS217451B1
CS217451B1 CS203380A CS203380A CS217451B1 CS 217451 B1 CS217451 B1 CS 217451B1 CS 203380 A CS203380 A CS 203380A CS 203380 A CS203380 A CS 203380A CS 217451 B1 CS217451 B1 CS 217451B1
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CS
Czechoslovakia
Prior art keywords
pile
foot
testing
shaft
jacks
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CS203380A
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Czech (cs)
Slovak (sk)
Inventor
Boris Cernak
Juraj Hlavacek
Alojz Pospis
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Boris Cernak
Juraj Hlavacek
Alojz Pospis
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Application filed by Boris Cernak, Juraj Hlavacek, Alojz Pospis filed Critical Boris Cernak
Priority to CS203380A priority Critical patent/CS217451B1/en
Priority to DE19813108492 priority patent/DE3108492C2/en
Priority to YU59681A priority patent/YU59681A/en
Priority to GB8107834A priority patent/GB2072247B/en
Priority to AT134981A priority patent/AT391505B/en
Priority to DD22867481A priority patent/DD160782A3/en
Priority to HU73981A priority patent/HU181292B/en
Publication of CS217451B1 publication Critical patent/CS217451B1/en

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Description

Vynález rieši spósob a zariadenie na skúšanie na mieste zhotovených pilot.The present invention provides a method and apparatus for on-site testing of piles.

DOteraz* používané sposoby iskúšania na mieste (zhotovených pilot majú nevýhody v tom, že vyžadujú vybudovanie kotveného zaťažovacieho mosta, zaťažovacieho mostia s protizáťažou alebo inej nadzemnej konštrukeie pre zaohytenie reakcie skúšobného zaťaženia, čo si vyžaduje zvýšenie nákladov, zvyšuje pracnost a oasovú náročnost. Dalšou nevýhodou doteraz používaných spósobov skiúšania je, že pre oddělené stánovenie odporu na pate a plástového trenia vyžadujú použitie tenzometrickej techniky, čím sa zvyšujú náklady a náročnost skúšok.On-site test methods used so far (piles made have the disadvantage of requiring the construction of an anchored load bridge, a load bridge with a counter-load or other above-ground structure to accommodate the test load response, requiring increased cost, labor and time consuming. The methods of skiing used hitherto are that they require the use of strain gauge technology to separately determine the heel resistance and the honeycomb friction, thereby increasing the cost and difficulty of the tests.

Uvedené nevýhody odstraňuje s}pósob a zariadenie na skúšanie na mieste zhotovených pilot podía vynálezu, ktorého podstata spóisobu spočívá v tom, že sia oddělená pata piloty zatláča dole v smere osi piloty konštantného prierezu pri siúčasnom vytláčaní alebo vytahovaní hoře drieku piloty, ipričom sila pósobiaca na oddelenú patu piloty jev rovnováhe so silou posobiacou na driek piloty. Plášťové trenie a tiaž drieku piloty sa využívá (ako reakcia pre vyvodenie skúšobného zaťaiženia na patu piloty. Odpor na pate piloty sa využívá ako reakcia pre vyvodenie skúšobného zaťaženia na driek piloty konštantného prierezu. Tým sa pri skúšaní oddelene zisťuje odpor na pate piloty v závislosti na posune paty piloty a plášťové trenie drieku piloty v závislosti na posune drieku piloty. Podstatou zariadenia podíia vynálezu je delený skúšobný válec, v ktorom sú uložené zdviháky a predlžovacia rúira, v ktorej je posuvné uložená tyč. V predlžovacej rúre je tiež uložené vedenie, které je zaústěné do zdvihákov. Pata piloty je pevne spojená s ityčou, na ktorej je indikovaný posun paty.These disadvantages are overcome by the method and the on-site pile testing apparatus of the present invention, which consists in pushing the separate pile foot down in the direction of the pile axis of a constant cross-section while simultaneously pushing or pulling the pile shaft upwards. the separate pile heel is in equilibrium with the force imparting to the pile shaft. Jacket friction and pile shaft weight is used (as a reaction to apply a test load to the pile heel. Resistance to the pile foot is used as a reaction to apply a test load to the pile shaft of a constant cross-section. According to the invention, there is a split test cylinder in which jacks and an extension tube are mounted, in which the rod is displaceably mounted, in the extension tube there is also a guide, which is disposed in the extension tube. The heel of the pile is firmly connected to a string on which the heel displacement is indicated.

Spósob a zariadenie na skúšanie na mieste zhotovených pilot podía vynálezu má výhody v tom, že je vylúčená potřeba postavenia zaťažovacieho mosta, čím sa ušetria náklady na žhotovenie kotevných pilot, (přepravu, montáž a demontáž kotveného zaťiažovacieho mosta alebo sa ušetria náklady na přepravu, montáž a demontáž zaťažovacieho mosta s protizáťažoiu. Súčasne je možné sa zaobísť bez vysokých nárokov na nedostatkové dopravné a zdvíhacie mechanizmy a podstatné skrátiť čas přípravy zaťažovacej skúšky. Dalšími výhodami spósobu a zariadenia na skúšanie na mieste zhotovenýdh pilot podía vynálezu je oddělené stanovenie odporu na pate a plášťového trenia bez použitia tenzometrickej techniky, dimenzovanie zdvihákov na poloviůné sklúšobné zaťaženie oproti doteraz používaným spósobom skúšania a možnost opátovného použitia váčšej časti zariadenia na skúšanie.The method and apparatus for on-site testing of piles according to the invention has the advantage of eliminating the need to build a load bridge, thereby saving the cost of making the anchor piles (transporting, assembling and dismantling the anchored load bridge) or saving transport, assembly At the same time, it is possible to dispense with the inadequate demands for inadequate conveying and lifting mechanisms and to substantially reduce the time of preparation of the load test Other advantages of the method and apparatus for on-site testing according to the invention friction without the use of strain-gauge technology, sizing of jacks to half-test load compared to previously used test methods and the possibility of reuse of a larger part of the test equipment.

Na připojených výkresech je uvedená schéma spóisobu a příklad vyhotovenia zariadenia na (skúšanie na mieste zhotovených pilot podía vynálezu a jeho umiestenie v pilote.The accompanying drawings show a schematic diagram and an example of an embodiment of a device for (on-site testing of piles according to the invention and its placement in the pile).

Na dbr. 1 je schematicky vyznačený spólsolb skúšania poldía vynálezu. Na obr. 2 je uvedený příklad zatažovacieho diagramu, ktorý :sa stanoví spósobom skúšania podía vynálezu. Na obr. 3 je schematicky vyznačený zvislý rez pilotou a skúšobným zariadením na skúšanie podía vynálezu, na obr. 4 je priečny rez pilotou a iskúšobným zariadením v rovině I—I a na obr. 5 je priečny rez skúšobným zariadením v rovině II—II.Na dbr. 1 is a schematic drawing of a test pole according to the invention. In FIG. 2 is an example of a load diagram which is determined by a test method according to the invention. In FIG. 3 is a schematic vertical cross-sectional view of a pilot and a test apparatus according to the invention; FIG. 4 is a cross-sectional view of the pile and test device in the plane I-I and FIG. 5 is a cross-sectional view of the test apparatus in plane II-II.

Spósob skúšania podía vynálezu znázorněný na olbr. 1 sa vykoná tak, že oddělená pata piloty 1 uložená na dne běžného vrtu sa zatláča dole v (smere Osi piloty konštantného prierezu pri isúčiasnom vytláčaní alebo vytahovaní drieku 2 piloty 1 hoře. Sila 18 pósobiaoa na oddelenú patu piloty 1 je v rovnováhe so silou 17 póísobiaoou na driek 2 pilotyThe test method of the invention shown in FIG. 1, the separate pile foot 1 located at the bottom of a conventional borehole is pushed downward (in the direction of the Pile Axis of constant cross-section while simultaneously pushing or pulling the pile shaft 1 upwards). 2 piles

1. Na pósobenie sily 18 reaguje pata piloty 1 odporom na pate 20. Na pósobenie sily 17 reaguje spočiatku vlastná itiaž drieku 2 piloty 1 a neskór plášťové trenie 19 drieku 2 piloty 1.1. For the force multiplication 18, the pile foot 1 responds to the foot 20. Resistance to the force 17 is initially reacted by the actual gravity of the shaft 2 of the pile 1 and the lateral friction 19 of the shaft 2 of the pile 1.

Spósobom skúšania podía vynálezu sa zaťažovací diagram 15, (znázorněný na óbr. '2, skonštruuje ako súčtový diagram 14 křivky odporu na pate a křivky 13 plášťového tréma. Křivka 14 odporu na pate sa vykreslí ako spojnica ibodov, získaných pri jednotlivýóh zaťažovacích stupňodh, pričom v smere vodorovné j osi 11 sa vynáša sila 18, znázorněná na obr. 1 a v smere zvislej osi 12 sa vynáša zodpovedajúci posun paty piloty 1. Podobme sa vykreslí křivka 13 plášťového trenia. V smere vodorovnej osi 11 sa v tomto případe vynáša skúšobná sila 17, znázorněná nia obr. 1, zmenšená o tiaž 16 drieku 2 piloty 1.In the test of the invention, the load diagram 15 (shown in FIG. 2) is constructed as a summation diagram 14 of the foot resistance curve and mantle curve 13. The foot resistance curve 14 is plotted as the line of ibods obtained at each load stage. in the direction of the horizontal axis 11, the force 18 shown in FIG. 1 is plotted and in the direction of the vertical axis 12 the corresponding displacement of the pile foot 1 is plotted. Similarly, the envelope friction curve 13 is plotted. 1, reduced by the weight 16 of the shaft 2 of the pile 1.

Zariadenie na skúšanie na mieste zhotovených (pilot podťa vynálezu, vykreslené na 'dbr. 3, obr. 4 a olbr. 5, pozostáva z děleného .skúšobného valca 3, v ktorom sú uložené zdviháky 4 a z predlžovacej rúry 5, v ktorej je posuvné uložená tyč 9 a vedenie 10, zaústěné do zdvihákov 4. So zariadením podía vynálezu sa pracuje tak, že po zhotovení paty 20 piloty 1 sa do běžného vrtu uloží delený válec 3 s predlžovacou rúrou 5 a medzera 8 medzi deleným valcom 3 a stěnou běžného vrtu sa vyplní pieskom alebo iným materiálem. Potom sa izhotoví driek 2 piloty 1.The on-site testing device (pilot according to the invention illustrated in Fig. 3, Fig. 4 and Fig. 5) consists of a split test cylinder 3 in which jacks 4 are supported and an extension tube 5 in which it is slidably mounted The device according to the invention is operated in such a way that after making the base 20 of the pile 1, a split cylinder 3 with an extension tube 5 is inserted into a conventional borehole and the gap 8 between the split cylinder 3 and the wall of the conventional borehole is inserted. it is filled with sand or other material.

So zariadením podía vynálezu znázornenom na obr. 3, sa pracuje tak, že sa v zdvihákoch 4 vyvodí sila 17 a sila 18, ktoré zátláčaijú páitu piloty 1 v smere osi piloty 1 zvisle alebo šikmo dole ;a driek 2 piloty 1 smerom hoře. Posun paty piloty 1 sa meria pomocou tyče 9 v mieste 6, posun drieku 2 piloty 1 sa meria priamo na hlavě piloty 1 v miestach 7 známým spósobom.With the device according to the invention shown in FIG. 3, work is carried out in the jacks 4 to exert a force 17 and a force 18 which push the pile 1 in the direction of the pile axis 1 vertically or at an angle downwards and the pile 2 of the pile 1 upwards. The displacement of the pile foot 1 is measured by means of a rod 9 at position 6, the displacement of the shaft 2 of pile 1 is measured directly on the pile head 1 at places 7 in a known manner.

V uvedenom příklade sú použité tri zdviháky 4. V závislosti na priemere paty piloty 1 a drieku 2 piloty 1, priemere zdvihákov 4 a velkosti sily 17 a sily 18 možno použit iný počet zdvihákov 4, připadne len jeden. Pri vyšších požiadavkách na přesnost stanovenia sily 17 ia sily 18 sa móže každý zdvihák 4 oipatriť běžným dynamometrem.In the above example, three jacks 4 are used. Depending on the diameter of the pile foot 1 and the shaft 2 of the pile 1, the diameter of the jacks 4 and the magnitude of the force 17 and force 18, a different number of jacks 4 may be used. With higher accuracy requirements for the determination of force 17 and force 18, each jack 4 may be fitted with a conventional dynamometer.

Claims (3)

l.Spósob skúšania na mieste zhotovených piiló-t, vyznaičujúci sa tým, že sa oddělená pata ipilóty (1) izatláča hydraulicky, mechanicky alebo pneumaticky v .smere osi piloty .(I) konštantného prierezu pri súčasnom výtláčaní alebo vytahovaní drieku (2) piloty (1), pričom sila (18) pósobiaca ismerom dole na odděl enú patu piloty (1) je v rovnovah e íso sadou (17), posobiacou smerom hoře na driek (2) piloty (1).A method of in-situ piilot testing, characterized in that a separate ipilot foot (1) is depressed hydraulically, mechanically or pneumatically in the direction of the pile axis (I) of constant cross-section while extruding or withdrawing the pile shaft (2) (1), wherein the downward force (18) on the separated pile foot (1) is in equilibrium with the set (17) pushing upwardly on the pile shaft (2) of the pile (1). 2. Sposob skúšania na mieste zhotovených pilát ipodTa bodu 1, vyznačuj úci sa tým, že sa pri sklúšaní oddelene zisťuje odpor na pate i(20) a plášťové trenie (19) 'drieku {2) piloty (1), ako aj odpovedajúci posun paty piloty (1) a posun drieku <(2) piloty (1).2. A method of on-site testing of pilate piles (1), characterized in that the pile (20) and shear friction (19) of the pile (2) of the pile (1) as well as the corresponding displacement pile foot (1) and shank displacement <(2) of pile (1). 3. Zariadenie na skúšanie na mieste 'zhotovených pilot, vyznačuj úce sa 'tým, že je vytvořené deleným skúšobným valcom (3), v ktorom sú uloižené zdviháky (4) a predlžovacou rúrou (5), v ktorej je posuvné uložená tyč 1(9) pre pevné spojenie s patou piloty :(1) a vedenie (10) zaústěné do zdvihákov (4).3. On-site pile testing device, characterized in that it is formed by a split test cylinder (3), in which jacks (4) and an extension tube (5) are accommodated, in which the rod 1 ( 9) for a fixed connection to the pile foot: (1) and a guide (10) opening into the jacks (4).
CS203380A 1980-03-24 1980-03-24 Method of and apparatus for testing on-the spot made piles CS217451B1 (en)

Priority Applications (7)

Application Number Priority Date Filing Date Title
CS203380A CS217451B1 (en) 1980-03-24 1980-03-24 Method of and apparatus for testing on-the spot made piles
DE19813108492 DE3108492C2 (en) 1980-03-24 1981-03-06 Procedure and arrangement for test loading of poured bored piles
YU59681A YU59681A (en) 1980-03-24 1981-03-09 Method of testing rods made in the field
GB8107834A GB2072247B (en) 1980-03-24 1981-03-12 Method and an arrangement for the testing of pile behaviour in situ
AT134981A AT391505B (en) 1980-03-24 1981-03-23 METHOD AND DEVICE FOR CHECKING Piles PRODUCED AT THE SITE
DD22867481A DD160782A3 (en) 1980-03-24 1981-03-24 METHOD AND APPARATUS FOR CHECKING THE PENCIL PRINT BY MEANS OF A SAMPLE LOAD
HU73981A HU181292B (en) 1980-03-24 1981-03-24 Method and apparatus for load testing piles produced in situ

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Application Number Priority Date Filing Date Title
CS203380A CS217451B1 (en) 1980-03-24 1980-03-24 Method of and apparatus for testing on-the spot made piles

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CS217451B1 true CS217451B1 (en) 1983-01-28

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CS203380A CS217451B1 (en) 1980-03-24 1980-03-24 Method of and apparatus for testing on-the spot made piles

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DD (1) DD160782A3 (en)

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DD160782A3 (en) 1984-03-07

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