CN109706921A - The double casing construction technologies of bored concrete pile - Google Patents

The double casing construction technologies of bored concrete pile Download PDF

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Publication number
CN109706921A
CN109706921A CN201910087227.7A CN201910087227A CN109706921A CN 109706921 A CN109706921 A CN 109706921A CN 201910087227 A CN201910087227 A CN 201910087227A CN 109706921 A CN109706921 A CN 109706921A
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China
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casing
steel pile
pile casting
sliding
fixing groove
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CN201910087227.7A
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CN109706921B (en
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杨佳岩
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China Harbour Engineering Co Ltd
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China Harbour Engineering Co Ltd
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Abstract

The invention discloses a kind of double casing construction technologies of bored concrete pile, comprising the following steps: Step 1: the outer casing of installation, the low side of the outer casing are located at 4~5m of layer of sand;Step 2: being co-axially mounted interior casing in outer casing, the low side of interior casing is located at 2~3m of medium ground;Step 3: the perfusion mortar in interior casing, tamps, stand, obtain screed, wherein the height of screed is 1~2m;Continue to creep into Step 4: passing through screed, until forming pore-forming;After outer casing installation, external casing carries out retaining wall processing, retaining wall processing method particularly includes: remove the boring mud and seawater in outer casing, fresh water is then added in outside casing, add the bentonite of 0.2 times of fresh water gross mass amount and stir uniform with mixing of fresh water to bentonite.Casing spillage problem has been effectively relieved by casing and outer casing in being arranged in the present invention, meanwhile, by the perfusion mortar in interior casing, further improve mortar leakage prevention effect.

Description

The double casing construction technologies of bored concrete pile
Technical field
The present invention relates to filling pile construction technical fields.It is more particularly related to a kind of shallow overburden bored concrete pile Double casing construction technologies.
Background technique
With the propulsion of Urbanization in China, coastal area harbour, highway bridge construction demand increasingly increase.Existing water Upper filling pile construction generally uses steel pile casting construction technology, but as coating at construction is shallower, steel pile casting embedded depth is inadequate, It is easy to cause spillage, currently, by the casing that follows up in punching, pouring mortar or using concrete to sealing at spillage It is stifled, it not can solve casing spillage problem.
Summary of the invention
It is an object of the invention to solve at least the above problems, and provide the advantages of at least will be described later.
It is a still further object of the present invention to provide a kind of bored concrete pile pair casing construction technologies, by casing in being arranged and outside Casing spillage problem has been effectively relieved in casing, meanwhile, by the perfusion mortar in interior casing, further improve mortar leakage prevention effect Fruit.
In order to realize these purposes and other advantages according to the present invention, a kind of double casing construction works of bored concrete pile are provided Skill, comprising the following steps:
Step 1: the outer casing of installation, the low side of the outer casing are located at 4~5m of layer of sand;
Step 2: being co-axially mounted interior casing in outer casing, the low side of interior casing is located at 2~3m of medium ground;
Step 3: the perfusion mortar in interior casing, to tamp, stands, obtain screed, wherein the height of screed is 1~ 2m;
Continue to creep into Step 4: passing through screed, until forming pore-forming.
Preferably, after outer casing installation, external casing carries out retaining wall processing, retaining wall processing method particularly includes: The boring mud and seawater in outer casing are removed, fresh water is then added in outside casing, adds the swelling of 0.2 times of fresh water gross mass amount Soil simultaneously stirs uniform with mixing of fresh water to bentonite.
Preferably, clay is filled between interior casing and outer casing.
Preferably, after pore-forming carry out borehole cleaning processing, borehole cleaning processing specifically includes the following steps:
S1, a borehole cleaning: a borehole cleaning is carried out using mud pump line;
S2, secondary pile hole cleaning: steel reinforcement cage and concrete perfusion conduit are installed in pore-forming, carried out using concrete perfusion conduit Recycle borehole cleaning.
Preferably, pore-forming uses concreting after carrying out borehole cleaning processing, forms bored concrete pile.
Preferably, the interior casing and outer casing are made of more piece steel pile casting, in which:
The affixed cylindric positioning tube in the steel pile casting bottom end being located above in two section steel pile casting of arbitrary neighborhood, the positioning tube Internal diameter is greater than the internal diameter of the steel pile casting, outer diameter is less than the outer diameter of the steel pile casting, and the steel pile casting is located at the positioning tube two The bottom end of side is recessed respectively forms two annular grooves, and two sliding slots are coaxially disposed with the steel pile casting, edge in two sliding slots The steel pile casting is circumferentially-spaced to be equipped with multiple groups driving assembly jointly, and the positioning tube is interior to fix group along its circumferentially-spaced multiple groups that are equipped with Part, multiple groups driving assembly are arranged in a one-to-one correspondence with multiple groups positioning component, the structure of the driving component and positioning component specifically:
Every group of driving assembly includes two and corresponds sealing respectively and slide up and down drive block in two sliding slots, use Correspond the fixed pulley for being fixedly arranged on two sliding slot bottoms, the driving respectively in the through hole of two sliding slots of connection and two The end of block is installed with the first spring, and the free end of first spring and sliding slot bottom end corresponding thereto are affixed, described to pass through The upper end of perforation is flushed with the bottom end of the sliding slot;
Every group of fixation kit includes multiple sliding chambers of the side wall through setting of the positioning tube, and multiple sliding chambers are between the upper and lower every setting It sets, the intracavitary sliding of each cunning is set there are two sliding block, is connected with second spring, any phase between two sliding blocks of bottom Two adjacent sliding chambers are communicated with slide opening, and sliding is equipped with connecting rod in the slide opening, and the upper end connection of the connecting rod is disposed thereon The sliding block of side, lower end connect the sliding block being disposed below, wherein run through between the cunning chamber and the through hole of bottom and set There is threading hole, is installed with the first wirerope positioned at the end of two sliding blocks of bottom, the centre of the first wirerope is installed with The free end of two wirerope, the second wirerope passes through the threading hole, and connect with third wirerope, the third wirerope Both ends are each passed through two fixed pulleys, and affixed with two drive blocks corresponding thereto respectively, in same fixation kit, by upper Vertical extension to the lower sliding block successively increases;
The underlying downward concave shape in steel pile casting top circularizes fixing groove in two section steel pile casting of arbitrary neighborhood, described solid Determine slot and the steel pile casting is coaxially disposed, accommodates component, multiple groups receiving group along its circumferentially-spaced multiple groups that are equipped in the fixing groove Part is arranged in a one-to-one correspondence with multiple groups fixation kit, and every group of receiving component includes that the sidewall spacers recess of the fixing groove is formed by Multipair holding tank, multipair holding tank is between the upper and lower every setting, and two holding tanks in each pair of holding tank are located at the fixation In the two side walls of slot, to accommodate two intracavitary sliding blocks of same cunning, each appearance in a pair of of holding tank of bottom respectively Receiving the bottom end of slot runs through equipped with mounting hole, is removably connected with push rod in the mounting hole, wherein the steel pile casting is located at institute The end for stating fixing groove two sides is installed with circular orientation block, and two locating pieces are coaxially disposed with the steel pile casting, described solid Determine slot to be adapted with the positioning region, the mounting hole is equipped with sealing cover far from the end of fixing groove corresponding thereto;
Wherein, the depth of the fixing groove is the 1/8 of the steel pile casting length, and the upper end of the locating piece is covered with first Diaphragm seal, the drive block are covered with the second diaphragm seal far from the end of first spring, and two section steel pile casting of arbitrary neighborhood connects Before connecing: the drive block part protrudes from outside the sliding slot, and it is intracavitary that the sliding block is located at its corresponding cunning, and described second Spring contraction, the push rod are separated with the mounting hole, and when any two sections steel pile casting connects: the locating piece is located at the sliding slot Interior, the sliding block, which corresponds, to be located in the holding tank, the bottom end for the steel pile casting being located above and is located below steel pile casting Top abuts, and the bottom end of the positioning tube for the steel pile casting being located above is abutted with the low side for the fixing groove being located below in steel pile casting.
The present invention is include at least the following beneficial effects:
The first, on the one hand the present invention can effectively reduce interior casing and outer by being used in combination in outer casing with interior casing On the other hand casing side wall spillage by the perfusion mortar in interior casing and is tamped, mortar can be made to be filled in bottom hole medium ground, Casing bottom spillage in reducing, and then the collapsing of interior casing and outer casing circumferential direction layer of sand and medium ground is avoided, guarantee perfusion Pile driving construction is normally carried out.
The second, the steel pile casting designed by the present invention, on the one hand plays positioning action to upper and lower two sections steel pile casting, effectively avoids Upper and lower two sections steel pile casting deviates during the installation process, the accuracy of steel pile casting installation is improved, on the other hand compared to existing Using welding, the present invention's two section steel pile castings is more convenient for the separation of upper and lower two sections steel pile casting up and down in technology, is conducive to steel pile casting It recycles, at the same time it can also reduce from junction spillage, guarantees being normally carried out for filling pile construction.
Third is located in the fixing groove by the positioning tube, is not only effectively prevented two section steel pile castings up and down and is occurred Dislocation, and it is possible to prevente effectively from spillage phenomenon occurs in junction, meanwhile, it can by the first diaphragm seal of setting, the second diaphragm seal The leakproofness of junction is further increased, spillage is reduced;By the way that locating piece is arranged, the stability of junction can be improved.
4th, by setting locating piece, the stability of junction can be improved;Driving assembly and fixation kit are set, led to Overdrive block, second spring drive the movement of the sliding block, realize the fixation to upper and lower two sections steel pile casting, by the way that mounting hole is arranged And push rod, the separation of sliding block with holding tank corresponding thereto is realized, to realize the separation of two section steel pile castings, compared with prior art By welding, not only separation method is simple and convenient for method of the invention, but also damage when separation to two section steel pile castings is smaller, prolongs Long steel pile casting uses the time.
Further advantage, target and feature of the invention will be partially reflected by the following instructions, and part will also be by this The research and practice of invention and be understood by the person skilled in the art.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of outer casing described in the one of technical solution of the present invention;
Fig. 2 is the structural schematic diagram of steel pile casting described in the one of technical solution of the present invention;
Fig. 3 is the enlarged drawing of part A in Fig. 2;
Fig. 4 is the structural schematic diagram of steel pile casting described in the one of technical solution of the present invention;
Fig. 5 is the enlarged drawing of part B in Fig. 4.
Specific embodiment
The present invention will be further described in detail below with reference to the embodiments, to enable those skilled in the art referring to specification Text can be implemented accordingly.
It should be noted that experimental method described in following embodiments is unless otherwise specified conventional method, institute Reagent and material are stated, unless otherwise specified, is commercially obtained;In the description of the present invention, term " transverse direction ", " vertical To ", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", the instructions such as "outside" side Position or positional relationship are to be based on the orientation or positional relationship shown in the drawings, and are merely for convenience of description of the present invention and simplification of the description, It is not that the device of indication or suggestion meaning or element must have a particular orientation, be constructed and operated in a specific orientation, because This is not considered as limiting the invention.
In the project of Namibia's Bay of Whales oil jetty, since steel pile casting coating is shallower, using conventional method to bored concrete pile It constructs, spillage is serious in pore forming process, to solve the problems, such as spillage, therefore implements the double casings of bored concrete pile of the present invention and applies Work technique.
As shown in Figure 1, the double casing construction technologies of bored concrete pile, comprising the following steps:
Step 1: being punched out drilling using the first pile monkey in design stake position, and outer casing 3 is installed, the outer casing 3 Low side is located at layer of sand 1 (upper end) 4~5m, wherein outer casing 3 is formed by connecting by more piece, the outer casing 3 of two sections in docking guiding ruler into Performing check, the junction of the outer casing 3 of two sections choose three points by equilateral triangle point and test, the straightness of the outer casing 3 of two sections Deviation d should be met less than 1.33cm, outer 3 top of casing is higher by bored concrete pile designed elevation 1m, to guarantee in casting concrete process In anti-slurry thoroughly, and then guarantee concreting quality;
Step 2: being punched out drilling using the second pile monkey in outer casing 3, boring mud is removed using fishing inder pot, and is measured Then bottom hole absolute altitude is co-axially mounted interior casing 4 (interior 4 top of casing is flushed with outer 3 top of casing), interior casing 4 in outer casing 3 Low side be located at 2 2~3m of medium ground, wherein 4 junction test stone of casing is with reference to step 1 China and foreign countries casing 3 in two sections Detection method;
Step 3: the perfusion mortar in interior casing 4, is pulled and pushed repeatedly using vibration hammer, tamp so that mortar is filled in bottom hole It in the gap of medium ground 2 and is filled between interior 4 bottom of casing and medium-hard rock on the outside of it, reduces spillage, stand 1d, Obtain screed, wherein the height of screed is 1~2m;
Continue to creep into Step 4: passing through screed using the second pile monkey, until forming pore-forming (as reaches bored concrete pile absolute altitude It is required that hole).
In this technical solution, the diameter of the first pile monkey drill bit is greater than the diameter of the second pile monkey drill bit.Using the technology On the one hand scheme, the present invention can effectively reduce interior casing 4 and outer casing 3 by being used in combination in outer casing 3 with interior casing 4 On the other hand side wall spillage by the perfusion mortar in interior casing 4 and is tamped, mortar can be made to be filled in bottom hole medium ground 2, subtracted 4 bottom spillage of casing in few, and then the collapsing of interior casing 4 and outer casing 3 circumferential layer of sand 1 and medium ground 2 is avoided, guarantee to fill Note pile driving construction is normally carried out.
In another technical solution, after outer casing 3 is installed, external casing 3 carries out retaining wall processing, retaining wall processing Method particularly includes: the boring mud and seawater in outer casing 3 are removed, then adds fresh water in outside casing 3, fresh water in outer casing 3 Height adds again lower than sea level height and higher than the height of layer of sand 1 (according to the depth of fresh water, calculating the total amount of fresh water in outer casing 3) Enter the bentonite of 0.2 times of fresh water gross mass amount and is stirred up and down using the second pile monkey uniform with mixing of fresh water to bentonite.Using The technical solution can be effectively reduced by outer 3 side wall spillage of casing.
In another technical solution, clay is filled between interior casing 4 and outer casing 3.Using the technical solution, not only may be used The stability for effectively improving interior casing 4 is prevented the interior casing 4 when being crept into using the second pile monkey from shifting, on the other hand can subtracted Spillage occurs for the side wall of casing 4 and outer casing 3 in few.
In another technical solution, after pore-forming carry out borehole cleaning processing, borehole cleaning processing specifically includes the following steps:
S1, a borehole cleaning: it is by the second pile monkey pull-up to steel platform top surface, mud pump line and the first pile monkey is affixed, then By the second pile monkey lower section to bottom hole, and the second pile monkey is moved up and down, net slurry is directed into pore-forming by mud pump line, until pore-forming Sand factor≤4% of interior mud, and pore-forming bottom hole sediment thickness≤5cm, one time borehole cleaning is completed;
S2, secondary pile hole cleaning: first installing steel reinforcement cage in pore-forming, and then the axis direction along the interior casing 4 is gradually transferred Tremie, tremie bottom are 25~30cm at a distance from bottom hole, are imported net slurry by concrete perfusion conduit Pore-forming bottom hole makes the mud of bottom hole float, and forms circulation borehole cleaning, until pore-forming bottom hole, without sediment, secondary pile hole cleaning is completed.Using the skill Art scheme is realized and carries out borehole cleaning to pore-forming, convenient for the concrete perfusion into pore-forming.
In another technical solution, pore-forming uses concreting after carrying out borehole cleaning processing, forms bored concrete pile, concrete It pours and direct pipe method is taken to pour.Using the technical solution, bored concrete pile is made.
In another technical solution, as shown in Figure 2-5, the interior casing 4 and outer casing 3 are by 5 groups of more piece steel pile casting At, in which:
The affixed cylindric positioning tube 6 in 5 bottom end of steel pile casting being located above in two section steel pile casting 5 of arbitrary neighborhood, the positioning The internal diameter of cylinder 6 is greater than the internal diameter of the steel pile casting 5, outer diameter is less than the outer diameter of the steel pile casting 5, and the steel pile casting 5 is located at described The bottom end of 6 two sides of positioning tube is recessed respectively forms two annular grooves 801, and two sliding slots 801 are coaxially set with the steel pile casting 5 It sets, circumferentially-spaced jointly equipped with multiple groups driving assembly along the steel pile casting 5 in two sliding slots 801, the positioning tube 6 is interior along its week To multiple groups fixation kit is equipped at intervals with, multiple groups driving assembly is arranged in a one-to-one correspondence with multiple groups positioning component, the driving component and The structure of positioning component specifically:
Every group of driving assembly corresponds to seal to slide up and down respectively including two and (seals a kind of realization slided specifically may be used Are as follows: the two side walls of the sliding slot 801 are equipped with slideway along its depth direction, are symmetrical arranged two cunnings on the drive block 804 Motion block, two sliding shoes correspond sliding and are set in two slideways, and the side wall that the slideway is located at the slideway two sides is equipped with Rubber layer, the drive block 804 are abutted with the rubber layer, to realize that the drive block 804 is slided with the sliding slot 801 sealing Connection) it is set to the drive block 804 in two sliding slots 801, through hole 802 and two difference one for being connected to two sliding slots 801 The one corresponding fixed pulley 805 for being fixedly arranged on two 801 bottoms of sliding slot, the end of the drive block 804 are installed with the first spring 803, The free end of first spring 803 and 801 bottom end of sliding slot corresponding thereto are affixed, the upper end of the through hole 802 and institute The bottom end for stating sliding slot 801 flushes;
Every group of fixation kit includes the sidewall horizontal of the positioning tube 6 above and below the multiple sliding chambers being arranged, multiple sliding chambers Interval setting, the intracavitary sliding of each cunning are set there are two sliding block 601, and the is connected between two sliding blocks 601 of bottom Two springs 604, the sliding chamber of two of arbitrary neighborhood is communicated with slide opening 602, and (length of 602 horizontal direction of slide opening is slightly less than described The length of 601 horizontal direction of sliding block), the interior sliding of the slide opening 602 is equipped with connecting rod 603, and the upper end of the connecting rod 603 connects The sliding block 601 being positioned above, lower end connect the sliding block 601 being disposed below, by the mobile driving of lower section sliding block 601 The movement of square sliding block 601, wherein through equipped with threading hole 607, position between the cunning chamber and the through hole 802 of bottom It is installed with the first wirerope 605 in the end of two sliding blocks 601 of bottom, the centre of the first wirerope 605 is installed with second Wirerope 606, the free end of the second wirerope 606 passes through the threading hole 607, and connect with third wirerope 807, and described the The both ends of three wirerope 807 are each passed through two fixed pulleys 805, and affixed with two drive blocks 804 corresponding thereto respectively, In same fixation kit, from top to bottom the vertical extension of the sliding block 601 is successively increased, and not can enter it to avoid sliding block 601 In corresponding holding tank 702;
The downward concave shape in underlying 5 top of steel pile casting circularizes fixing groove 701 in two section steel pile casting 5 of arbitrary neighborhood, The fixing groove 701 is coaxially disposed with the steel pile casting 5, circumferentially-spaced equipped with multiple groups receiving group along its in the fixing groove 701 Part, multiple groups accommodate component and are arranged in a one-to-one correspondence with multiple groups fixation kit, and every group of receiving component includes the side wall of the fixing groove 701 Spaced depressions are formed by multipair holding tank 702, and multipair holding tank 702 is between the upper and lower every setting, and two in each pair of holding tank 702 A holding tank 702 is located in the two side walls of the fixing groove 701 (notch of each pair of holding tank 702 is opposite), with respectively Two intracavitary sliding blocks 601 of same cunning are accommodated, the bottom end of each holding tank 702 is equal in a pair of of holding tank 702 of bottom Through mounting hole 703 is equipped with, be removably connected in the mounting hole 703 push rod (a kind of implementation being detachably connected are as follows: The diameter of the mounting hole 703 is slightly larger than the diameter of the push rod, to realize the detachable of the push rod and the mounting hole 703 Connection), wherein the end that the steel pile casting 5 is located at 701 two sides of fixing groove is installed with circular orientation block 704, and two are fixed Position block 704 is coaxially disposed with the steel pile casting 5, and the fixing groove 701 is adapted with the positioning region, the mounting hole 703 End far from fixing groove 701 corresponding thereto is equipped with sealing cover, to close the mounting hole 703 when transferring steel pile casting 5, Avoid mud enter mounting hole 703 and cunning it is intracavitary, influence normal use;
Wherein, the depth of the fixing groove 701 is the 1/8 of 5 length of steel pile casting, and the upper end of the locating piece 704 is covered It is stamped the first diaphragm seal, the drive block 804 is covered with the second diaphragm seal, any phase far from the end of first spring 803 Before adjacent two section steel pile castings 5 connection: 804 part of drive block protrudes from outside the sliding slot 801, and the sliding block 601 is located at Its corresponding cunning is intracavitary, and first spring 803, second spring 604 are in contraction state, the push rod and the installation Hole 703 separates, and when any two sections steel pile casting 5 connects: the locating piece 704 is located in the sliding slot 801, the sliding block 601 1 One corresponds in the holding tank 702, and the bottom end for the steel pile casting 5 being located above is abutted with the top for being located below steel pile casting 5, The bottom end of the positioning tube 6 for the steel pile casting 5 being located above is abutted with the low side for the fixing groove 701 being located below in steel pile casting 5.At this In technical solution, when two section steel pile castings 5 are connected to, the push rod is separated with the mounting hole 703, is dismantling two section steel pile castings 5 When, push rod is inserted into mounting hole 703, and it is intracavitary by push rod promotion sliding block 601 to be moved to the cunning, realizes the sliding block 601 with the separation of holding tank 702 corresponding thereto, when the upper end for the locating piece 704 being located above is contacted with the drive block 804 When, the cunning chamber positioned at bottom is located in the fixing groove 701, in use process, connect two section steel pile castings 5 when: steel pile casting 5 to Lower movement, the locating piece 704 are abutted with the drive block 804, and the drive block 804 is pushed to move up, when described fixed Position cylinder 6 bottom end is moved to when abutting with the bottom of the fixing groove 701, and the driving of second spring 604 is positioned at bottom sliding block 601 is mobile, and bottom sliding block 601 successively drives the sliding block 601 part that is moved to of top sliding block 601 to enter corresponding thereto In the holding tank 702 answered, two section steel pile castings 5 are fixed;When two section steel pile castings 5 separate: opening sealing cover, the push rod is inserted into institute It states in mounting hole 703, and push rod is pushed to separate to the sliding block 601 with holding tank 702 corresponding thereto, move up section Steel pile casting 5 moves down lower section steel pile casting 5, and two section steel pile castings 5 separation, first spring 803 drives the drive block 804, which are moved downward to 804 part of drive block, protrudes from outside the sliding slot 801, and the sliding block 601 is located at its corresponding cunning It is intracavitary.Using the technical solution, on the one hand steel pile casting 5 designed by the present invention plays positioning to upper and lower two sections steel pile casting 5 and makees With, effectively avoid upper and lower two section steel pile castings 5 from deviating during the installation process, the accuracy that raising steel pile casting 5 is installed, another party Face compared with the prior art in using welding, the present invention's two section steel pile castings 5 is more convenient for the separation of upper and lower two sections steel pile casting 5 up and down, Be conducive to the recycling of steel pile casting 5, at the same time it can also reduce from junction spillage, guarantee being normally carried out for filling pile construction; It is located in the fixing groove 701 by the positioning tube 6, not only effectively prevents two section steel pile castings 5 up and down and misplace, but also It is possible to prevente effectively from there is spillage phenomenon in junction, meanwhile, it can further improve by the first diaphragm seal of setting, the second diaphragm seal The leakproofness of junction reduces spillage;By the way that locating piece 704 is arranged, the stability of junction can be improved;Driving assembly is set And fixation kit, the movement of the sliding block 601 is driven by drive block 804, second spring 604, realizes and upper and lower two sections steel is protected The fixation of cylinder 5 realizes the separation of sliding block 601 with holding tank 702 corresponding thereto by setting mounting hole 703 and push rod, thus Realize the separation of two section steel pile castings 5, compared with prior art by welding, not only separation method is simple and convenient for method of the invention, And damage when separating to two section steel pile castings 5 is smaller, and extend steel pile casting 5 uses the time.
Number of devices and treatment scale described herein are for simplifying explanation of the invention.It is double to bored concrete pile of the present invention The application of casing construction technology, modifications and variations will be readily apparent to persons skilled in the art.
Although the embodiments of the present invention have been disclosed as above, but its is not only in the description and the implementation listed With it can be fully applied to various fields suitable for the present invention, for those skilled in the art, can be easily Realize other modification, therefore without departing from the general concept defined in the claims and the equivalent scope, the present invention is simultaneously unlimited In specific details and legend shown and described herein.

Claims (6)

1. the double casing construction technologies of bored concrete pile, which comprises the following steps:
Step 1: the outer casing of installation, the low side of the outer casing are located at 4~5m of layer of sand;
Step 2: being co-axially mounted interior casing in outer casing, the low side of interior casing is located at 2~3m of medium ground;
Step 3: the perfusion mortar in interior casing, tamps, stand, obtain screed, wherein the height of screed is 1~2m;
Continue to creep into Step 4: passing through screed, until forming pore-forming.
2. the double casing construction technologies of bored concrete pile as described in claim 1, which is characterized in that after outer casing installation, externally Casing carries out retaining wall processing, retaining wall processing method particularly includes: the boring mud and seawater in outer casing are removed, then in outside casing Fresh water is added, the bentonite of 0.2 times of fresh water gross mass amount is added and is stirred uniform with mixing of fresh water to bentonite.
3. the double casing construction technologies of bored concrete pile as described in claim 1, which is characterized in that filled between interior casing and outer casing Clay.
4. the double casing construction technologies of bored concrete pile as described in claim 1, which is characterized in that carry out borehole cleaning processing after pore-forming, clearly Hole processing specifically includes the following steps:
S1, a borehole cleaning: a borehole cleaning is carried out using mud pump line;
S2, secondary pile hole cleaning: steel reinforcement cage and concrete perfusion conduit are installed in pore-forming, recycled using concrete perfusion conduit Borehole cleaning.
5. the double casing construction technologies of bored concrete pile as claimed in claim 4, which is characterized in that pore-forming uses after carrying out borehole cleaning processing Concreting forms bored concrete pile.
6. the double casing construction technologies of bored concrete pile as described in claim 1, which is characterized in that the interior casing and outer casing by More piece steel pile casting composition, in which:
The affixed cylindric positioning tube in the steel pile casting bottom end being located above in two section steel pile casting of arbitrary neighborhood, the internal diameter of the positioning tube Greater than the outer diameter that internal diameter, the outer diameter of the steel pile casting are less than the steel pile casting, the steel pile casting is located at the positioning tube two sides Bottom end is recessed respectively forms two annular grooves, and two sliding slots are coaxially disposed with the steel pile casting, along described in two sliding slots Steel pile casting is circumferentially-spaced to be equipped with multiple groups driving assembly jointly, in the positioning tube along its it is circumferentially-spaced be equipped with multiple groups fixation kit, Multiple groups driving assembly is arranged in a one-to-one correspondence with multiple groups positioning component, the structure of the driving component and positioning component specifically:
Every group of driving assembly includes two and corresponds sealing respectively and slide up and down drive block in two sliding slots, for connecting The through hole of logical two sliding slots and two correspond the fixed pulley for being fixedly arranged on two sliding slot bottoms respectively, the drive block End is installed with the first spring, and the free end of first spring and sliding slot bottom end corresponding thereto are affixed, the through hole Upper end flushed with the bottom end of the sliding slot;
Every group of fixation kit includes multiple sliding chambers of the side wall through setting of the positioning tube, multiple sliding chambers between the upper and lower every setting, The intracavitary sliding of each cunning is set there are two sliding block, is connected with second spring, arbitrary neighborhood between two sliding blocks of bottom Two sliding chambers be communicated with slide opening, sliding is equipped with connecting rod in the slide opening, and the upper end connection of the connecting rod is positioned above Sliding block, lower end connects the sliding block that is disposed below, wherein through being equipped between the cunning chamber and the through hole of bottom Threading hole is installed with the first wirerope positioned at the end of two sliding blocks of bottom, and the centre of the first wirerope is installed with second The free end of wirerope, the second wirerope passes through the threading hole, and connect with third wirerope, the two of the third wirerope End is each passed through two fixed pulleys, and affixed with two drive blocks corresponding thereto respectively, in same fixation kit, by up to Under the vertical extension of the sliding block successively increase;
The underlying downward concave shape in steel pile casting top circularizes fixing groove, the fixing groove in two section steel pile casting of arbitrary neighborhood Be coaxially disposed with the steel pile casting, accommodate component along its circumferentially-spaced multiple groups that are equipped in the fixing groove, multiple groups accommodate component with Multiple groups fixation kit is arranged in a one-to-one correspondence, every group of receiving component include the fixing groove sidewall spacers recess be formed by it is multipair Holding tank, multipair holding tank is between the upper and lower every setting, and two holding tanks in each pair of holding tank are located at the fixing groove In two side walls, to accommodate two intracavitary sliding blocks of same cunning, each holding tank in a pair of of holding tank of bottom respectively Bottom end run through equipped with mounting hole, be removably connected with push rod in the mounting hole, wherein the steel pile casting be located at it is described solid The end for determining slot two sides is installed with circular orientation block, and two locating pieces are coaxially disposed with the steel pile casting, the fixing groove It is adapted with the positioning region, the mounting hole is equipped with sealing cover far from the end of fixing groove corresponding thereto;
Wherein, the depth of the fixing groove is the 1/8 of the steel pile casting length, and the upper end of the locating piece is covered with the first sealing Piece, the drive block is covered with the second diaphragm seal far from the end of first spring, before the connection of two section steel pile casting of arbitrary neighborhood: The drive block part protrudes from outside the sliding slot, and it is intracavitary that the sliding block is located at its corresponding cunning, the second spring It shrinking, the push rod is separated with the mounting hole, and when any two sections steel pile casting connects: the locating piece is positioned in the chute, The sliding block, which corresponds, to be located in the holding tank, the bottom end for the steel pile casting being located above and the top for being located below steel pile casting It abuts, the bottom end of the positioning tube for the steel pile casting being located above is abutted with the low side for the fixing groove being located below in steel pile casting.
CN201910087227.7A 2019-01-29 2019-01-29 Construction process for double pile casings of cast-in-place pile Active CN109706921B (en)

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CN110485414A (en) * 2019-08-26 2019-11-22 中建五局第三建设有限公司 A kind of double casing rotary digging stake techniques in drift sand stratum
CN111809616A (en) * 2020-07-30 2020-10-23 江苏师范大学 Self-locking mechanical connecting device and connecting method
CN111851478A (en) * 2020-07-13 2020-10-30 深圳市工勘岩土集团有限公司 Pile-forming construction method for light corrugated steel pile casing isolation non-filling karst cave filling pile

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CN106149683A (en) * 2015-04-23 2016-11-23 五冶集团上海有限公司 A kind of cast-in-place pile construction method using double casing to pass through deep metalling
CN108408636A (en) * 2018-02-01 2018-08-17 重庆恒佳工程技术咨询有限公司 A kind of two-way jacking component of intelligent tensioning

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CN101761072A (en) * 2008-12-24 2010-06-30 上海市基础工程公司 Construction process for bored pile close to flood wall through riprap layer
CN103967032A (en) * 2014-04-16 2014-08-06 青岛理工大学 Double-protective-cylinder cast-in-situ bored pile used for highly-corrosive salty soil and construction method of double-protective-cylinder cast-in-situ bored pile
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CN111851478A (en) * 2020-07-13 2020-10-30 深圳市工勘岩土集团有限公司 Pile-forming construction method for light corrugated steel pile casing isolation non-filling karst cave filling pile
CN111809616A (en) * 2020-07-30 2020-10-23 江苏师范大学 Self-locking mechanical connecting device and connecting method

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