CN113123339B - Quick breaking structure for super-grouting part of pile top of cast-in-place pile - Google Patents
Quick breaking structure for super-grouting part of pile top of cast-in-place pile Download PDFInfo
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- CN113123339B CN113123339B CN202110484456.XA CN202110484456A CN113123339B CN 113123339 B CN113123339 B CN 113123339B CN 202110484456 A CN202110484456 A CN 202110484456A CN 113123339 B CN113123339 B CN 113123339B
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D9/00—Removing sheet piles bulkheads, piles, mould-pipes or other moulds or parts thereof
- E02D9/005—Removing sheet piles bulkheads, piles, mould-pipes or other moulds or parts thereof removing the top of placed piles of sheet piles
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D33/00—Testing foundations or foundation structures
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Abstract
The invention discloses a rapid breaking structure of a pile top super-irrigation part of a cast-in-place pile, which comprises a pile top super-irrigation part and a normal pile section below the pile top super-irrigation part, wherein each longitudinal main rib of the super-irrigation part is sleeved with a longitudinal sleeve with a downward opening; one side of each longitudinal sleeve is correspondingly provided with a transverse sleeve and a heat fusion block; the cross section of the transverse sleeve is in a flat eye shape, and the transverse sleeve comprises an upper cambered surface, a lower cambered surface and a left sharp corner and a right sharp corner; one side of each transverse sleeve is opened outwards, the outer opening of each transverse sleeve is positioned on the side surface of the cast-in-place pile, water is filled in each transverse sleeve, and a plug is arranged at each outer opening; the bottom cambered surface of the hot-melt block is fixed with the upper cambered surface of the transverse sleeve in a hot-melting mode, and the side cambered surface of the hot-melt connecting block is fixed with the outer wall of the longitudinal sleeve in a hot-melting mode; the bottom ring surface of the longitudinal sleeve is flush with the height interface of the transverse sleeve. The quick breaking structure is quick, efficient and labor-saving in operation, the fracture is smooth, and the elevation of the fracture surface can be effectively controlled.
Description
Technical Field
The invention relates to the technical field of foundation pile construction, in particular to a rapid breaking structure for a pile top super-grouting part of a cast-in-place pile.
Background
The cast-in-place pile is a common foundation pile form, and the construction steps are roughly as follows: and forming a hole by using a pile machine, adopting slurry to protect the wall until the hole is drilled to the elevation of the bottom of the hole, then lowering a reinforcement cage, then inserting a guide pipe downwards and pouring concrete. In order to ensure the quality of pile foundation, the concrete is required to be over-poured, i.e. the height is higher than the designed elevation of pile top by a certain height, such as 1 m. After the concrete is excessively poured and before the concrete bearing platform and the bottom plate are poured and tamped in the later period, the concrete at the excessively poured part of the pile top is knocked off and leaks out of the longitudinal main reinforcement of the reinforcement cage, then the leaked longitudinal main reinforcement is bound with the reinforcement in the bearing platform, and then the concrete of the bearing platform is poured and tamped. And in the construction process, the residual pile head is required to be ensured to extend into the bearing platform to meet the design requirement after the super-irrigation part is broken, for example, the pile head extends into the bearing platform by 10 cm.
However, the following drawbacks exist in the prior art operation. Firstly, the pile top super-irrigation part is hammered and crushed by workers holding hammerheads, the efficiency is low, the speed is low, the operation is laborious, the labor cost is high, the labor cost for knocking off the super-irrigation part of a single cast-in-place pile is as high as four hundred to five hundred, the number of cast-in-place piles in a construction site is large, the huge labor cost is generated by knocking off the concrete of the super-irrigation part of the pile top of all cast-in-place piles, and the economy is poor; moreover, because the manual knocking is non-standard operation, the randomness is high, the longitudinal main reinforcement of the over-irrigation part and the concrete of the rest pile head below the over-irrigation part are likely to be damaged, and the quality and the performance of the pile body are influenced; and, because the randomness of manual knocking also can lead to the fracture unevenness of the pile body, namely the height of the damaged pile body is inconsistent, the top elevation of the residual pile head is difficult to control, and the height of the residual pile head extending into the bearing platform can not be ensured to meet the design requirement naturally.
Disclosure of Invention
The invention aims to solve the technical problem of providing a rapid breaking structure of a pile top super-irrigation part of a cast-in-place pile, which has the advantages of rapid, efficient and labor-saving operation, capability of obviously reducing the labor cost, smooth fracture, no damage to a longitudinal main rib of the super-irrigation part and the concrete of the rest pile head below the super-irrigation part, and capability of effectively controlling the elevation of the fracture surface and enabling the height of the rest pile head extending into a bearing platform to meet the design requirement.
The technical scheme of the invention is that the invention provides a rapid breaking structure of a pile top over-grouting part of a cast-in-place pile, which comprises the pile top over-grouting part and a normal pile section below the pile top over-grouting part, wherein a reinforcement cage of the cast-in-place pile comprises a plurality of stirrups and a plurality of longitudinal main reinforcements in the normal pile section, and the reinforcement cage only comprises a plurality of longitudinal main reinforcements in the over-grouting part; each longitudinal main rib of the super irrigation part is sleeved with a longitudinal sleeve with a downward opening; one side of each longitudinal sleeve is correspondingly provided with a transverse sleeve and a hot melt block; the cross section of the transverse sleeve is in a flat eye shape, and the transverse sleeve comprises an upper cambered surface, a lower cambered surface and a left sharp corner and a right sharp corner; one side of each transverse sleeve is opened outwards, the outer opening of each transverse sleeve is positioned on the side surface of the cast-in-place pile, water is filled in each transverse sleeve, and a plug is arranged at each outer opening; the hot melting block is provided with a bottom arc surface and a side arc surface, the bottom arc surface of the hot melting block is fixed with the upper arc surface of the transverse casing pipe in a hot melting mode, and the side arc surface of the hot melting connecting block is fixed with the outer wall of the longitudinal casing pipe in a hot melting mode; the bottom ring surface of the longitudinal sleeve is flush with the height interface of the transverse sleeve.
Compared with the prior art, the rapid breaking structure for the pile top super-grouting part of the cast-in-place pile has the following advantages.
Firstly, analyzing the working process of the structure: after the concrete pouring process is finished, excavating peripheral soil to enable the over-poured part of the pile top to be exposed, and exposing an outer opening of a circle of transverse sleeve on the side face of the poured pile; a worker pulls out the plug to enable water in the transverse sleeve to flow out, then holds the hydraulic splitting machine, inserts a middle wedge block of the splitting machine into an outer opening of the transverse sleeve, hydraulically drives the middle wedge block to advance, and struts the transverse sleeve towards the upper side and the lower side to generate cracks; and because the cross section of the transverse sleeve is eye-shaped, the left sharp corner and the right sharp corner play a role in stress release and crack guide, and two cracks extending left and right are ensured to be approximately positioned on the same horizontal plane, namely the interface of the super-irrigation part and the normal pile section; and (3) repeatedly operating the hydraulic splitting machine to prop open the transverse sleeves one by one so that the cracks are mutually diffused and connected to form a section between the super-irrigation part and the normal pile section, and finally, lifting the cracked super-irrigation part by using the lifting ring.
There are several bright spots in this structure. Firstly, the transverse sleeve and the longitudinal sleeve are connected by the hot melting block, and the side surface and the bottom surface of the hot melting block are cambered surfaces corresponding to the cambered walls of the transverse sleeve or the longitudinal sleeve, so that the contact area is large, the hot melting adhesion is firm, namely the problem of connection and fixation of the transverse sleeve and the longitudinal sleeve is solved, and the longitudinal sleeve is sleeved on the longitudinal main rib, so that the problem of installation and positioning in the height direction of the transverse sleeve and the longitudinal sleeve is solved, and the moving height of the two sleeves under pressure during concrete pouring is avoided; meanwhile, the arrangement that the transverse sleeves are arranged at intervals along one circle of the circumference of the pile body is realized, so that the over-irrigation parts are propped open one by one, the splitting is uniform, the splitting effect is good, and the pile is smooth and labor-saving; moreover, the hot melting block serving as a connecting part of the two sleeves is positioned above the transverse sleeve, so that a splitting plane in the middle of the height of the transverse sleeve is just avoided, and the problem that the connection interference of the transverse sleeve and the longitudinal sleeve hinders the development and diffusion of interface cracks is avoided; moreover, the longitudinal sleeve sleeves the longitudinal main rib, so that the longitudinal main rib and the concrete material of the super-irrigation part are just separated, the bonding between the longitudinal main rib and the concrete material is reduced, the longitudinal main rib and the concrete material are easy to separate, and in any case, the bottom ring surface of the longitudinal sleeve is also accurately arranged on the interface, so that the condition that the longitudinal sleeve per se blocks the development and diffusion of cracks is further avoided; still because during the pouring concrete, fill water and the end cap is established to outer opening in the horizontal sleeve pipe, like this, can not only avoid the concrete material to get into horizontal sleeve pipe and effectively resisted pouring pressure, effectively support horizontal sleeve pipe and avoid it to be shriveled at the pouring in-process.
The analysis shows that the structure is rapid, efficient and labor-saving in operation, the labor cost is obviously reduced, and the labor cost of removing the over-irrigation part of a single cast-in-place pile is reduced to be within 50, so that a great deal of labor cost is saved for construction enterprises, and the economic benefit is obvious; moreover, the fracture of the cast-in-place pile is smooth and regular, and the splitting is directionally developed, so that the longitudinal main rib of the over-cast part and the concrete of the residual pile head below the over-cast part are effectively avoided and protected; moreover, the elevation of the section is accurate and controllable, and the height of the residual pile head extending into the bearing platform can meet the design requirement after the over-irrigation part is broken.
Preferably, one side of each transverse sleeve is welded with a fan-shaped annular filter screen, and the other side of each transverse sleeve is provided with a clamping groove; the transverse sleeve, the fan-shaped annular filter screen welded with the transverse sleeve and the longitudinal sleeve fixed by the transverse sleeve in a hot melting way form a group; the outer wall of each transverse sleeve is provided with an inner wire groove and an outer wire groove; one side of the fan-shaped filter screen is directly welded with the same group of transverse sleeves, the other side of the fan-shaped filter screen is welded with a side straight rib, the inner end of the fan-shaped filter screen is welded with an inner annular rib, and the outer end of the fan-shaped filter screen is welded with an outer annular rib; the straight side rib of each fan-shaped filter screen is clamped into the clamping groove of the other adjacent group of transverse sleeves, the straight side rib is bound and fixed with the adjacent transverse sleeves through two iron wires, and the two iron wires are wound in the inner wire grooves and the outer wire grooves of the adjacent transverse sleeves; the sector annular filter screen is hollowed with holes for the longitudinal sleeves in the same group to pass through, and the bottom surface of the sector annular filter screen is flush with the bottom ring surface of the longitudinal sleeve and the height interface of the transverse sleeve.
The advantages of the above preferred structure are as follows. The structure is essentially characterized in that the fan-shaped annular filter screen is used for connecting and fixing all the transverse sleeves, so that the problem of horizontal positioning of all the transverse sleeves is solved, the transverse sleeves are prevented from moving horizontally under the pressure of concrete during pouring, the transverse sleeves are uniformly distributed along the circumferential direction of a pile body and indicate the position of a pile core directly, the initial cracking positions of all cracks are uniform, and the smooth and neat fracture surfaces formed by mutual diffusion of all the cracks are ensured; moreover, a plurality of fan-shaped annular filter screens are connected end to form an integral filter screen, the filter screen allows cement slurry to pass through but blocks coarse aggregate, so that no coarse aggregate exists on the upper part of the filter screen, and the coarse aggregate on the lower part of the filter screen is accumulated, thus an interface with suddenly reduced strength is formed between the super-irrigation part and the normal pile section, the longitude and latitude are clear, the gradient is obvious, the development and extension of each crack are objectively guided, the crack is further ensured to be concentrated on the interface, and the smooth and neat split surface between the super-irrigation part and the normal pile section of the pile body is further ensured; moreover, one side of the fan-shaped filter screen is welded, the other side of the fan-shaped filter screen is provided with a side straight rib, and the inner end and the outer end of the fan-shaped filter screen are respectively provided with an inner ring rib and an outer ring rib, so that the strength of the filter screen is ensured, each transverse sleeve is firmly positioned, the assembling process is convenient and quick, only the side straight rib on one side needs to be clamped into the clamping groove of the adjacent transverse sleeve, and then the side straight rib and the transverse sleeve are bound by two steel wire ropes, and the double-line groove design of the transverse sleeve not only facilitates the binding process, but also ensures the binding firmness; in addition, the inner ring rib at the inner end of the fan-shaped ring-shaped filter screen strengthens the strength of the filter screen, strengthens the support of the transverse sleeve, just hollows out the position of the pile core, is convenient for arranging a conduit and ensures the concrete pouring process; moreover, the bottom surface of the filter screen is flush with the splitting plane, namely, the filter screen is highly just avoided from the splitting plane on the premise of realizing the effect of connecting the transverse sleeve and filtering aggregate to form a strength drop gradient, so that the development and the expansion of each crack are not interfered.
Preferably, the fan-shaped filter screen is provided with a pressure sensor; firstly, the pressure sensor is fixed on the existing filter screen, the installation position is convenient and reasonable, and more importantly, the pressure sensor can detect the pressure of coarse aggregate at the lower part of the filter screen in time, so that a worker can properly set a critical value, grouting is stopped when the pressure value reaches the critical value, at the moment, the bottom surface of the filter screen is taken as a boundary, the pressure value reaches the critical value, the difference between the upper pressure and the lower pressure is large enough, the difference between the upper gradient and the lower gradient is obvious, and further, the extending development guiding effect of each crack is obvious, so that the smoothness and the neatness of the fracture surface are further ensured.
Drawings
Fig. 1 is a schematic structural view of a rapid breaking structure of a pile top super-grouting part of a cast-in-place pile before concrete pouring.
Fig. 2 is a schematic view of the structure of fig. 1 after being deflected by a certain angle.
Fig. 3 is an enlarged structural schematic diagram of the transverse sleeve, the longitudinal sleeve, the sector annular filter screen and the hot melt block of the rapid breaking structure of the pile top super-grouting part of the cast-in-place pile.
Fig. 4 is a schematic view of the structure of fig. 3 after being deflected by a certain angle.
Fig. 5 is a schematic structural diagram of a rapid demolition structure of a pile top super-grouting part of a cast-in-place pile of the invention.
Fig. 6 is a schematic structural view of the cast-in-place pile top super-grouting part of the present invention, after the structure is cracked, the super-grouting part is lifted away.
Fig. 7 is an enlarged structural schematic view of a super-irrigation part of the rapid breaking structure of the super-irrigation part of the pile top of the cast-in-place pile of the invention.
Shown in the figure are 1, a super-irrigation part, 2, a normal pile section, 3, a longitudinal main rib, 4, a longitudinal sleeve, 5, a transverse sleeve, 6, hot melt blocks, 7, a bottom arc surface, 8, a side arc surface, 9, a fan-shaped annular filter screen, 10, a clamping groove, 11, an inner wire groove, 12, an outer wire groove, 13, a side straight rib, 14, an inner annular rib, 15, an outer annular rib, 16, a hole, 17, a conduit, 18 and a hanging ring.
Detailed Description
The invention is further described with reference to the following figures and specific examples.
As shown in fig. 1 to 7, the structure for rapidly breaking the pile top excess irrigation part of the cast-in-place pile of the present invention includes a pile top excess irrigation part 1 to be broken and a normal pile section 2 located below the pile top excess irrigation part 1 and left after being broken, wherein a reinforcement cage of the cast-in-place pile includes a plurality of stirrups and a plurality of longitudinal main reinforcements 3 in the normal pile section 2, and the reinforcement cage includes only the plurality of longitudinal main reinforcements 3 in the excess irrigation part 1 without the stirrups.
Each longitudinal main rib 3 of the super irrigation part 1 is sleeved with a longitudinal sleeve 4 with a downward opening; the longitudinal casing 4 is coated with isolating substances such as butter or asphalt, and has the functions of preventing cement paste from entering the longitudinal casing 4 during pouring and facilitating separation of the over-poured part 1 and the longitudinal main rib 3 anchored in the normal pile section 2 during hoisting after cracking.
Each longitudinal sleeve 4 is provided on one side with a transverse sleeve 5 and a hot melt block 6. The cross section of the transverse sleeve 5 is in a flat eye shape, and the transverse sleeve 5 comprises an upper cambered surface, a lower cambered surface and a left sharp corner and a right sharp corner. Each transverse sleeve 5 is provided with an outward opening at one side, the outer opening of each transverse sleeve 5 is positioned on the side surface of the cast-in-place pile, water is filled in each transverse sleeve 5, and a plug is arranged at the outer opening. That is, before concrete is poured, water needs to be filled into the transverse sleeve 5 and the outer opening of the transverse sleeve 5 needs to be sealed by a plug, so that the water pressure in the transverse sleeve 5 can resist the pouring pressure; after the super-irrigation part 1 is poured and tamped, digging soil on the side of the pile, leaking the super-irrigation part 1, and removing the plug of the outer opening of the transverse sleeve 5.
The hot melting block 6 is provided with a bottom arc surface 7 and a side arc surface 8, the bottom arc surface 7 of the hot melting block 6 is fixed with the upper arc surface of the corresponding transverse sleeve 5 in a hot melting mode, and the side arc surface 8 of the hot melting connecting block 6 is fixed with the outer wall of the corresponding longitudinal sleeve 4 in a hot melting mode.
The bottom annulus of the longitudinal sleeve 4 is flush with the level of the level interface of the transverse sleeve 5, i.e. half the level of the transverse sleeve 5.
Every 5 side welding of horizontal sleeve pipe have a fan-shaped filter screen 9, and this 5 opposite sides of horizontal sleeve pipe are equipped with joint groove 10 one. The transverse sleeve 5, the fan-shaped annular filter screen 9 welded with the transverse sleeve 5 and the longitudinal sleeve 4 fixed with the transverse sleeve 5 in a hot melting mode form a group. The outer wall of each transverse sleeve 5 is provided with an inner wire groove 11 and an outer wire groove 12; one side of the fan-shaped filter screen 9 is directly welded with the transverse sleeves 5 in the same group, the other side of the fan-shaped filter screen is welded with a side straight rib 13, the inner end of the fan-shaped filter screen 9 is welded with an inner annular rib 14, and the outer end of the fan-shaped filter screen is welded with an outer annular rib 15; the side straight rib 13 of each fan-shaped annular filter screen 9 is clamped into the clamping groove 10 of the other adjacent group of the transverse sleeves 5, the side straight rib 13 is bound and fixed with the adjacent transverse sleeves 5 through two iron wires, and the two iron wires are wound in the inner wire groove 11 and the outer wire groove 12 of the adjacent transverse sleeves 5; each fan-shaped ring-shaped filter screen 9 is hollowed with a hole 16 for the longitudinal sleeve 4 of the same group to pass through, and the bottom surface of the fan-shaped ring-shaped filter screen 9 is flush with the bottom ring surface of the longitudinal sleeve 4 and the height interface of the transverse sleeve 5.
The fan-shaped filter screens 9 are connected end to form a complete filter screen, and the inner ring ribs 14 are also connected end to form a complete inner ring, which not only reinforces the connection of the inner ends of the transverse sleeves 5, but also vacates the position of the pile core and leaves space for inserting the guide pipes 17.
The fan-shaped filter screen 9 is provided with a pressure sensor. As known in the art, the pressure sensor is connected to a display located at the pile top by a data line, and transmits the pressure value to the display.
In the application, need use the hydraulic pressure splitting machine of hand-held type, this hydraulic pressure splitting machine is ripe prior art, and therefore concrete structure is no longer repeated.
Certainly, after the super irrigation part 1 is split, the hanging ring 18 fixed to the anchor is embedded in the top of the super irrigation part 1. Facilitating subsequent lifting.
Claims (2)
1. A rapid breaking structure of a pile top over-grouting part of a cast-in-place pile comprises a pile top over-grouting part (1) and a normal pile section (2) below the pile top over-grouting part, wherein a reinforcement cage of the cast-in-place pile comprises a plurality of stirrups and a plurality of longitudinal main reinforcements (3) in the normal pile section (2), and the reinforcement cage only comprises the plurality of longitudinal main reinforcements (3) in the over-grouting part (1); the method is characterized in that: each longitudinal main rib (3) of the super irrigation part (1) is sleeved with a longitudinal sleeve (4) with a downward opening; one side of each longitudinal sleeve (4) is correspondingly provided with a transverse sleeve (5) and a heat fusion block (6); the cross section of the transverse sleeve (5) is in a flat eye shape, and the transverse sleeve (5) comprises an upper cambered surface, a lower cambered surface, a left sharp corner and a right sharp corner; one side of each transverse sleeve (5) is opened outwards, the outer opening of each transverse sleeve (5) is positioned on the side surface of the cast-in-place pile, water is filled in each transverse sleeve (5), and a plug is arranged at each outer opening; the hot melt block (6) is provided with a bottom cambered surface (7) and a side cambered surface (8), the bottom cambered surface (7) of the hot melt block (6) is in hot melting fixation with the upper cambered surface of the transverse sleeve (5), and the side cambered surface (8) of the hot melt block (6) is in hot melting fixation with the outer wall of the longitudinal sleeve (4); the bottom ring surface of the longitudinal sleeve (4) is flush with the height interface of the transverse sleeve (5);
one side of each transverse sleeve (5) is welded with a fan-shaped annular filter screen (9), and the other side of each transverse sleeve (5) is provided with a clamping groove (10); the transverse sleeve (5), a fan-shaped annular filter screen (9) welded on the transverse sleeve (5) and a longitudinal sleeve (4) fixed by the transverse sleeve (5) through hot melting form a group; the outer wall of each transverse sleeve (5) is provided with an inner wire groove (11) and an outer wire groove (12); one side of the fan-shaped filter screen (9) is directly welded with the transverse sleeve (5) in the same group, the other side of the fan-shaped filter screen is welded with a side straight rib (13), the inner end of the fan-shaped filter screen (9) is welded with an inner annular rib (14), and the outer end of the fan-shaped filter screen is welded with an outer annular rib (15); the side straight rib (13) of each fan-shaped annular filter screen (9) is clamped into the clamping groove (10) of the other adjacent group of transverse sleeves (5), the side straight rib (13) is bound and fixed with the adjacent transverse sleeves (5) through two iron wires, and the two iron wires are wound in the inner wire groove (11) and the outer wire groove (12) of the adjacent transverse sleeves (5); the fan-shaped annular filter screen (9) is hollowed with holes (16) for the longitudinal sleeves (4) in the same group to pass through, and the bottom surface of the fan-shaped annular filter screen (9) is flush with the bottom annular surface of the longitudinal sleeves (4) and the height interface of the transverse sleeves (5).
2. The rapid demolition structure of a cast-in-place pile cap super-grouting part according to claim 1, characterized in that: the fan-shaped ring-shaped filter screen (9) is provided with a pressure sensor.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110484456.XA CN113123339B (en) | 2021-04-30 | 2021-04-30 | Quick breaking structure for super-grouting part of pile top of cast-in-place pile |
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| CN202110484456.XA CN113123339B (en) | 2021-04-30 | 2021-04-30 | Quick breaking structure for super-grouting part of pile top of cast-in-place pile |
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| GB0523404D0 (en) * | 2004-11-18 | 2005-12-28 | Shanks John | Method for breaking down concrete piles |
| CN108547303A (en) * | 2018-04-11 | 2018-09-18 | 云南建投基础工程有限责任公司 | A kind of filling pile head abolishes auxiliary device and pile crown restructuring bankrupt |
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| CN110306537A (en) * | 2019-07-23 | 2019-10-08 | 中国一冶集团有限公司 | Filling pile head construction method |
| CN111395342A (en) * | 2020-03-26 | 2020-07-10 | 中国一冶集团有限公司 | Construction method for cast-in-place pile broken pile head, auxiliary isolation net and preparation method of auxiliary isolation net |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4366597B2 (en) * | 2004-09-28 | 2009-11-18 | 吉夫 松本 | Cutting and removing existing piles |
| CN207263088U (en) * | 2017-09-08 | 2018-04-20 | 无锡市交通工程有限公司 | A kind of drill-pouring pile concrete absolute altitude measurement device |
| CN109989393A (en) * | 2017-12-30 | 2019-07-09 | 广州协安建设工程有限公司 | Bored concrete pile and its pile crown breaking construction method |
| CN110847171B (en) * | 2019-10-31 | 2021-06-18 | 安徽建筑大学 | Construction method for integrally cutting off unset concrete pile head |
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2021
- 2021-04-30 CN CN202110484456.XA patent/CN113123339B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB0523404D0 (en) * | 2004-11-18 | 2005-12-28 | Shanks John | Method for breaking down concrete piles |
| CN108547303A (en) * | 2018-04-11 | 2018-09-18 | 云南建投基础工程有限责任公司 | A kind of filling pile head abolishes auxiliary device and pile crown restructuring bankrupt |
| CN208668423U (en) * | 2018-08-07 | 2019-03-29 | 南京市裕和建设有限公司 | The superfilled control device of drill-pouring pile underwater concrete |
| CN110306537A (en) * | 2019-07-23 | 2019-10-08 | 中国一冶集团有限公司 | Filling pile head construction method |
| CN111395342A (en) * | 2020-03-26 | 2020-07-10 | 中国一冶集团有限公司 | Construction method for cast-in-place pile broken pile head, auxiliary isolation net and preparation method of auxiliary isolation net |
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| CN113123339A (en) | 2021-07-16 |
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