CN102409667B - Construction device and construction process of extruded and expanded cast-in-place pile - Google Patents
Construction device and construction process of extruded and expanded cast-in-place pile Download PDFInfo
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Abstract
The invention discloses a construction device and a construction process of an extruded and expanded cast-in-place pile. The construction device is a holding-pressing type static-pressure pile machine, wherein a hydraulic cylinder connected with the holding-pressing type static-pressure pile machine is clamped by a holding-pressing device and drives a protective barrel and an inner pipe; the lower end of the protective barrel is provided with a pile shoe; the lower end of the inner pipe is provided with a flat-head sealing plug; the length of the inner pipe is less than that of the protective barrel; and the position of the static-pressure pile machine corresponding to the protective barrel is provided with a through hole through which the protective barrel penetrates. The protective barrel is provided with a vibrating device and the side wall of the protective barrel is provided with a feeding port. The construction process of the extruded and expanded cast-in-place pile is mainly characterized in that concrete with certain slump is poured from the feeding port of the protective barrel, the inner pipe is pressed downwards by using the hydraulic cylinder, and a part of concrete in the protective barrel is extruded from the lower end of the protective barrel to form a pile-end expanding head; the protective barrel is lifted to form a plurality of middle bosses at different heights of a pile body; and the inner pipe is lifted, a steel-bar cage is put in, the concrete is poured, and the pile is formed by vibration. The invention has the characteristics that the length of the pile is not limited by the mechanical height of the static-pressure pile machine and the construction efficiency is high.
Description
Technical field
The present invention relates to construction equipment and the construction technology of the squeezed castinplace pile of concrete that a kind of building field Foundation Design uses.
Background technology
Stake in construction work at present has a variety of, and what wherein static pressure pipe pile and long screw auger pressure deposited castinplace pile were used is more.Static pressure pipe pile is to shift to an earlier date prefabricated concrete tubular pile, aligns the installation site of layout design when use, pile tube is slowly pressed in soil with static pressure machine.Because the reason of transportation and lifting, pile tube can not be accomplished the same long with the stake designing, can only be than some short pipe nipple pile tubes of the degree of depth of design stake, pipe nipple pile tube is made in advance according to certain length and diameter dimension, two ends are designed with the flange of steel, in the time of the piling of construction site, then pipe nipple pile tube one welding together successively, owing to being subject to place and artificial effects limit, welding quality is difficult to guarantee.Several years ago static pressure pipe pile is subject to everybody favor soon with its speed of application, but As time goes on, it is found that it has following shortcoming: 1, the joint area between every joint of pile tube is too weak, easy fracture under lateral forces.Sometimes, because soil compaction will squeeze off the stake of having constructed in construction at joint area.Joint area also can corrosion in addition.2, cost is high, and static pressure pipe pile is due to transportation, lifting and embrace the intensity that the reason pile tubes such as pressure must do with hydraulic cylinder very high, conventionally requires to be greater than C50; The end resistance of static pressure pipe pile is also little, wants to improve bearing capacity, must add timber pile long.Long screw auger pressure deposited castinplace pile is underground to get out the hole identical with pile body with the drill bit of spiral what need pile, then in hole, loads concrete, forms pile body.This method application is also very extensive, but there is following shortcoming in it: 1, because its stake end (being the bottom of pile body) is the same with the size of pile body, the resistance of its end is very little, the support force that the bottom surface of stake can provide is very little, only have by pile body frictional force around bearing capacity is provided, be subject to the restriction of equipment because stake is long, so the bearing capacity of long screw auger pressure deposited castinplace pile is also restricted; 2, during due to concrete perfusion, there is no casing protection concrete, in the time of the construction operation of soft clay area, concrete can flow with loose soil, easily occurs the defect such as undergauge and broken pile; In sandy soil, concrete mobile row is larger, and when construction, because the disturbance to the soil body makes liquefaction of soil mass, the concrete of the stake that the stake of hot work in progress and just having constructed is not also solidified may connect together, and easily occurs string hole, even causes and can not construct.Therefore long screw auger pressure deposited castinplace pile can not meet the requirement that workmanship improves day by day.
Chinese patent CN101126239A discloses a kind of construction equipment and construction technology of concrete pipe base, its construction equipment comprises top-pressed static-pressure piling machine tool and is connected with manometric hydraulic cylinder, also comprise casing and inner tube, the length of inner tube is greater than the length of casing, and the lower end of inner tube is provided with tack shutoff.When use, static pressed pile machinery support good after, casing and inner tube are placed on to the stake position place below static pressed pile machinery, then by the pressure of hydraulic cylinder, casing and inner tube are pressed in soil layer.On casing, be provided with shaking device and have charge door on the sidewall of casing.The main points of its construction technology are to be pressed onto after design attitude at casing and inner tube, inner tube is mentioned, in the charge door of casing, in casing, add the first-class building waste of building brick, form stake end prose style free from parallelism force-bearing table in the bottom of casing with building waste, then on stake end prose style free from parallelism force-bearing table, form stake end solid force-bearing table with harsh concrete, and on the differing heights of stake, form multiple middle boss; Mention inner tube, put into reinforcing cage, concrete perfusion, vibrations pile.
The major advantage of above-mentioned patented technology is: 1, because formed the solid force-bearing table of building waste prose style free from parallelism force-bearing table and harsh concrete at stake end, so other castinplace pile of bearing capacity ratio equal length improves greatly.2, replace heavy tamping with hydraulic cylinder static pressure, eliminated vibrations and noise pollution.3,, by the quality of pressure meter control stake, reduced the error that artificially judges by rule of thumb bearing capacity.Therefore this patented technology is widely used in building pile foundation field.But in engineering practice, also find that there is following shortcoming: 1, this technology adopts top swaging formula, it is long that the height of equipment must be greater than stake, in other words the long restriction that is subject to equipment of stake, stake is long can not be made very longly, but sometimes because the needs of engineering, it is very dark that possibility stake designs, and this construction equipment just can not meet the requirement of design like this.2, when this technology forms stake end solid force-bearing table, be with harsh concrete, because harsh concrete poor fluidity is especially not easy to form enlarged footing in the time that the regional soil property of piling is harder.And enlarged footing and pile body combination that harsh concrete forms are also bad.3, the length of inner tube is greater than the length of casing, because the position that exceeds casing charge door must be mentioned in inner tube bottom when at every turn reinforced, when the long stake of construction, inner tube deduction distance is large, and the time that at every turn promotes inner tube is all very long, so efficiency of construction is too low.
Summary of the invention
The technical issues that need to address of the present invention are to provide a kind of construction equipment and construction technology of the squeezed castinplace pile that can make dark stake, large bearing capacity.
For solving the problems of the technologies described above, the technical solution adopted in the present invention is:
A kind of construction equipment of squeezed castinplace pile, comprise that the casing that is provided with base and is provided with shoe with the hydraulic cylinder that is fixedly mounted on the static pressed pile machinery of the support on base, be connected with support, lower end, the lower end coordinating with casing internal diameter arrange the inner tube of tack shutoff, described static pressed pile machinery is contracting static-pressure piling machine tool, on the support of static pressed pile machinery above casing, be provided with the through hole passing for casing, one end of hydraulic cylinder is provided with the pressure device that clamps and drive casing or inner tube, is respectively arranged with the block coordinating with pressure device on the outer wall of inner tube and casing; The length of described inner tube is less than the length of casing.
The further improvement of this construction equipment is: the outer wall of described inner tube upper end arranges one group of block coordinating with pressure device; On casing outer wall, be arranged at intervals with the block that many groups coordinate with pressure device, the distance between every group of block of casing outer wall is corresponding with the stroke of hydraulic cylinder.
The further improvement of this construction equipment is: on the sidewall of described casing, have charge door, be also provided with the concrete shaking device of vibrations on casing.
The further improvement of this construction equipment is: the shoe of described casing is flap valve shoe or concrete shoe.
A construction technology for squeezed castinplace pile, described processing step comprises:
A, static pressed pile machinery is moved to stake position place, and lower end is arranged on the casing of shoe in the hole of support of static pressed pile machinery and makes casing be erected at stake position place, pressure device on hydraulic cylinder is arranged on casing and with one group of block on casing and is coordinated, primer fluid cylinder pressure is by the soil at casing pressure pile position place, then unclamp and promote pressure device, make pressure device and coordinate at another upper group block, and again press down casing, until arrive have bearing capacity higher, the projected depth of metastable soil layer;
B, pressure device is installed on inner pipe and make it to coordinate with the block in inner tube;
C, then mention inner tube and pour into and there is the concrete of certain slump until fill up casing from the charge door of casing; Primer fluid cylinder pressure, to pressing down inner tube, makes the part concrete in casing extrude from the lower end of casing;
D, repeating step C are until the concrete that extrude casing lower end reaches design quantity, while forming the stake end enlarged footing of designing requirement in the soil layer of specifying in design, stop extruded concrete;
E, proposition inner tube are placed reinforcing cage in casing, perfusion pile concrete, and limit shakes and smashes pile with shock club after carrying casing limit shaking device vibrations casing or mentioning casing.
The further improvement of construction method of the present invention is, when having in the depth bounds of stake, multiple bearing capacities are higher, when metastable soil layer, in order to improve the bearing capacity of stake, complete above-mentioned processing step A after D, proceed technological operation below:
F, mention casing and inner tube to another design height, this design height is higher, the metastable soil layer of bearing capacity, and fixing casing;
G, mention inner tube, in casing, inject the concrete with certain slump;
H, with hydraulic cylinder to pressing down inner tube, the concrete part in casing is extruded from the lower end of casing;
I, repeating step G, H are until the concrete of extruding reaches the middle boss of a concrete on design quantity, formation pile body;
J, repeating step F, G, H, I, on the differing heights of stake is different higher, the metastable soil layer of bearing capacity, form multiple in the middle of boss;
K, proposition inner tube are placed reinforcing cage in casing, perfusion pile concrete, and limit shakes and smashes pile with shock club after carrying casing limit shaking device vibrations casing or mentioning casing.
The further improvement of construction technology of the present invention is: the described concrete slump is greater than 10 centimetres, is less than 20 centimetres, and concrete data are long according to stake, stake footpath and geological conditions are determined.
Owing to having adopted technique scheme, the technological progress that the present invention obtains is:
The present invention arranges the through hole that casing can freely be come in and gone out on the support of static pressed pile machinery, adopt pressure device to coordinate the block in casing and inner tube to carry out piling, the long restriction that is not subject to static pressed pile machinery height of stake, more can utilize higher, the metastable soil layer of darker bearing capacity, more can make the stake of large bearing capacity.The casing of use with shoe, adopt the concrete that the slump is larger to replace building waste and harsh concrete to make enlarged footing, just can adopt shorter inner tube, the concrete on extruding casing top, by the concrete power transmission at casing middle part, the concrete of casing bottom is squeezed out to casing from the lower end of casing.Inner tube is shorter, and the time of at every turn putting forward inner tube is just short, so speed of application has been accelerated.Due to this concrete good fluidity, in hard soil layer, more easily form enlarged footing, and enlarged footing can do very large, bearing capacity is also with regard to corresponding raising; Also because good fluidity, enlarged footing can and pile body combination better; Even if pile body bottom arrives lithosphere, the concrete of good fluidity also can well be connected to form one with rock.Moreover the whole process of construction method of the present invention all completes with hydraulic pressure, avoid ramming and expanded the vibrations that bring, avoid the impact that completed stake and Adjacent Buildings to adjacent, its pile quality is evenly reliable, and otherness is little.
The block that many groups and pressure device match is set on the differing heights of casing, when pressing casing and carrying casing, does not directly contact casing, block is passed to casing power, avoids pressure device directly to contact casing and damages casing.Many group blocks are set facilitates hydraulic cylinder to pass through pressure device substep in the soil at casing pressure pile position place.On the sidewall of casing, open charge door, can be when reinforced, inner tube needn't be proposed outside casing completely, just can be reinforced at the charge door of side, not only rapidly reinforced, and the complex operations that need to again align while having avoided inner tube to propose again to enter casing behind casing outside, make the easy construction rapid.The concrete shaking device of vibrations is set on casing, after concrete perfusion, promotes in the process of casing, can shake casing in lifting limit, limit, thereby by the concrete ram-jolt in casing.
To sum up, even if the present invention has stake, the long restriction that is not subject to static pressed pile machinery height also can form at hard soil layer the high feature of enlarged footing, efficiency of construction that bearing capacity is high.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention;
Fig. 2 is main construction techniques process schematic diagram of the present invention to Fig. 5;
Fig. 6 is the structural representation of the dark stake of large bearing capacity.
Wherein, 1, support, 2, hydraulic cylinder, 3, pressure device, 4, block, 5, shaking device, 6, charge door, 7, casing, 8, inner tube, 9, shoe, 10, stake end enlarged footing, 11, reinforcing cage, 12, middle boss.
The specific embodiment
Below in conjunction with embodiment, the present invention is described in further details:
The construction equipment of the squeezed castinplace pile of the present invention adopts contracting static-pressure piling machine tool, and static pressed pile machinery comprises base, is arranged on the support 1 on base.The pair of hydraulic cylinders that can move up and down 2 that on support, connected symmetrical dendrimer is arranged, the lower end of hydraulic cylinder arranges pressure device 3.The construction equipment of squeezed castinplace pile also comprises inner tube 8 and casing 7.The external diameter of inner tube coordinates with the internal diameter of casing, and the length of inner tube is less than the length that expands cylinder.The lower end of casing is provided with the shoe 9 of being convenient to piling, and the lower end of inner tube is provided with tack shutoff.The outer wall of inner tube upper end arranges one group of block coordinating with pressure device 4, and the outer wall interval of casing arranges the block that many groups coordinate with pressure device, and the distance between every group of block of casing outer wall is corresponding with the stroke of hydraulic cylinder.Pressure device clamping casing or inner tube, hydraulic cylinder by pressure device to pressing down or upwards mentioning casing or inner tube.The position of the corresponding casing of described support arranges the through hole passing for casing, and casing can pass from through hole, and the length of casing is not just subject to the restriction of support height like this, i.e. the long restriction that is not subject to static pressed pile machinery height of stake, can do dark stake.On the sidewall of described casing, have charge door 6, on casing, be also provided with the concrete shaking device 5 of vibrations.
Embodiment 1
A, static pressed pile machinery is moved to stake position place, and lower end is arranged on the casing of shoe in the hole of support of static pressed pile machinery and makes casing be erected at stake position place, pressure device on hydraulic cylinder is arranged on casing and with one group of block on casing and is coordinated, primer fluid cylinder pressure is by the soil at casing pressure pile position place, then unclamp and promote pressure device, make pressure device and coordinate at another upper group block, and again press down casing, until arrive have bearing capacity higher, the projected depth of metastable soil layer.Under normal circumstances, the diameter of stake is 50 centimetres of left and right, and the degree of depth of stake is 20 meters of left and right.
B, pressure device is installed on inner pipe and make it to coordinate with the block in inner tube;
C, then mention inner tube and inject and there is the concrete of certain slump until fill up casing from the charge door of casing; Primer fluid cylinder pressure, to pressing down inner tube, makes the part concrete in casing extrude from the lower end of casing; This concrete slump is generally greater than 10 centimetres, is less than 20 centimetres, and concrete data are long according to stake, stake footpath and geological conditions are determined.
D, repeating step C are until the concrete that extrude casing lower end reaches design quantity, while forming the stake end enlarged footing of designing requirement in the soil layer of specifying in design, stop extruded concrete, as shown in Figure 4.
E, proposition inner tube are placed reinforcing cage as shown in Figure 5 in casing, perfusion pile concrete, and limit shakes and smashes pile with shock club after carrying casing limit shaking device vibrations casing or mentioning casing.
When having in the depth bounds of stake, multiple bearing capacities are higher, when metastable soil layer, in order to improve the bearing capacity of stake, complete above-mentioned processing step A after D, proceed technological operation below:
F, mention casing and casing to another design height, this design height is higher, the metastable soil layer of bearing capacity, and fixing casing.
G, mention inner tube and inner tube arrives, in casing, perfusion has the concrete of certain slump; The standard of this concrete slump is identical with step C.
H, with hydraulic cylinder to pressing down inner tube, the concrete part in casing is extruded from the lower end of casing.
I, repeating step G, H are until the concrete of extruding reaches a middle boss on design quantity, formation pile body.
J, repeating step F, G, H, I, on the differing heights of stake is different higher, the metastable soil layer of bearing capacity, form multiple in the middle of boss.
K, proposition inner tube as shown in Figure 6, are placed reinforcing cage in casing, perfusion pile concrete, and limit shakes and smashes pile with shock club after carrying casing limit shaking device vibrations casing or mentioning casing.
Claims (3)
1. the construction technology of the construction equipment of a squeezed castinplace pile, it is characterized in that: the construction equipment of squeezed castinplace pile, comprise static pressed pile machinery, and static pressed pile machinery is provided with base and is fixedly mounted on the support (1) on base, the hydraulic cylinder (2) being connected with support (1), also comprise that lower end is provided with the casing of shoe (9) (7), the lower end coordinating with casing internal diameter arranges the inner tube (8) of tack shutoff, described static pressed pile machinery is contracting static-pressure piling machine tool, on the support (1) of static pressed pile machinery above casing, be provided with the through hole passing for casing, one end of hydraulic cylinder (2) is provided with the pressure device (3) that clamps and drive casing (7) or inner tube (8), on the outer wall of inner tube and casing, be respectively arranged with the block (4) coordinating with pressure device, the length of described inner tube is less than the length of casing, the outer wall of described inner tube upper end arranges one group of block coordinating with pressure device (4), on casing outer wall, be arranged at intervals with the block that many groups coordinate with pressure device, the distance between every group of block (4) of casing outer wall is corresponding with the stroke of hydraulic cylinder, the shoe of described casing is flap valve shoe or concrete shoe, on the sidewall of described casing, have charge door (6), on casing, be also provided with the concrete shaking devices of vibrations (5),
Described processing step comprises:
A, static pressed pile machinery is moved to stake position place, and lower end is arranged on the casing of shoe in the hole of support of static pressed pile machinery and makes casing be erected at stake position place, pressure device on hydraulic cylinder is arranged on casing and with one group of block on casing and is coordinated, primer fluid cylinder pressure is by the soil at casing pressure pile position place, then unclamp and promote pressure device, make pressure device and coordinate at another upper group block, and again press down casing, until arrive projected depth;
B, pressure device is installed on inner pipe and make it to coordinate with the block in inner tube;
C, then mention inner tube and inject and there is the concrete of certain slump until fill up casing from the charge door of casing; Primer fluid cylinder pressure, to pressing down inner tube, makes the part concrete in casing extrude from the lower end of casing;
D, repeating step C are until the concrete that extrude casing lower end reaches design quantity, while forming the stake end enlarged footing of designing requirement in the soil layer of specifying in design, stop extruded concrete;
E, proposition inner tube are placed reinforcing cage in casing, perfusion pile concrete, and limit shakes and smashes pile with shock club after carrying casing limit shaking device vibrations casing or mentioning casing.
2. the construction technology of the construction equipment of a kind of squeezed castinplace pile according to claim 1, is characterized in that: complete above-mentioned processing step A after D, proceeding technological operation below:
F, mention casing and inner tube to another design height, and fixing casing;
G, mention inner tube, in casing, inject the concrete with certain slump;
H, with hydraulic cylinder to pressing down inner tube, the concrete part in casing is extruded from the lower end of casing;
I, repeating step G, H are until the concrete of extruding reaches a middle boss on design quantity, formation pile body;
J, repeating step F, G, H, I, on the differing heights of stake is different higher, the metastable soil layer of bearing capacity, form multiple in the middle of boss;
K, proposition inner tube are placed reinforcing cage in casing, perfusion pile concrete, and limit shakes and smashes pile with shock club after carrying casing limit shaking device vibrations casing or mentioning casing.
3. according to the construction technology of the construction equipment of a kind of squeezed castinplace pile described in claim 1 or 2, it is characterized in that: the described concrete slump is greater than 10 centimetres, is less than 20 centimetres.
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| CN201110214591.9A CN102409667B (en) | 2011-07-29 | 2011-07-29 | Construction device and construction process of extruded and expanded cast-in-place pile |
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| CN201110214591.9A CN102409667B (en) | 2011-07-29 | 2011-07-29 | Construction device and construction process of extruded and expanded cast-in-place pile |
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| CN102409667B true CN102409667B (en) | 2014-06-18 |
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Families Citing this family (7)
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| CN103114579B (en) * | 2013-02-22 | 2015-01-07 | 建基建设集团有限公司 | Dynamic compaction vibration compound base-expanded pile machine and construction method of dynamic compaction vibration compound base-expanded pile |
| CN105649074B (en) * | 2016-03-22 | 2019-09-03 | 沙焕焕 | The squeezed concrete stiff composite pile of tubular pole and its construction method |
| CN105926621B (en) * | 2016-04-28 | 2018-05-29 | 王继忠 | A kind of construction method of static pressure carrier pile |
| CN105887812B (en) * | 2016-04-29 | 2017-07-28 | 朱龙 | A kind of single casing construction method of static pressure, immersed tube carrier bored concrete pile |
| CN105926594A (en) * | 2016-04-29 | 2016-09-07 | 朱龙 | Double-pipe construction method for static pressure pipe-sinking carrier cast-in-place pile |
| CN110016909B (en) * | 2019-04-26 | 2021-04-09 | 中煤长江基础建设有限公司 | Construction method for expanding reinforced bored pile by hydraulic squeezing and expanding combined bag grouting pile body |
| CN113802544B (en) * | 2021-10-28 | 2023-04-07 | 福建省兴岩建设集团有限公司 | Concrete pouring pile foundation anti-broken pile processor and construction method thereof |
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