CN114086590B - Pre-reinforcing device for repairing pile foundation of transmission terminal tower and construction method thereof - Google Patents
Pre-reinforcing device for repairing pile foundation of transmission terminal tower and construction method thereof Download PDFInfo
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- CN114086590B CN114086590B CN202111344443.9A CN202111344443A CN114086590B CN 114086590 B CN114086590 B CN 114086590B CN 202111344443 A CN202111344443 A CN 202111344443A CN 114086590 B CN114086590 B CN 114086590B
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D27/00—Foundations as substructures
- E02D27/32—Foundations for special purposes
- E02D27/42—Foundations for poles, masts or chimneys
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D15/00—Handling building or like materials for hydraulic engineering or foundations
- E02D15/02—Handling of bulk concrete specially for foundation or hydraulic engineering purposes
- E02D15/04—Placing concrete in mould-pipes, pile tubes, bore-holes or narrow shafts
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D27/00—Foundations as substructures
- E02D27/10—Deep foundations
- E02D27/12—Pile foundations
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D27/00—Foundations as substructures
- E02D27/10—Deep foundations
- E02D27/12—Pile foundations
- E02D27/14—Pile framings, i.e. piles assembled to form the substructure
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
- E02D5/22—Piles
- E02D5/223—Details of top sections of foundation piles
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
- E02D5/22—Piles
- E02D5/64—Repairing piles
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D7/00—Methods or apparatus for placing sheet pile bulkheads, piles, mouldpipes, or other moulds
- E02D7/20—Placing by pressure or pulling power
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Abstract
The invention relates to the technical field of pile foundation reinforcement, in particular to a pre-reinforcing device for repairing a transmission terminal tower pile foundation and a construction method thereof. The pre-reinforcing device comprises a bamboo joint pipe pile, a bearing platform supporting structure and grouting equipment. The bamboo joint pipe pile comprises a pile cap, a pile head, a pile body and a pile tip, and grouting holes are formed in the joint of the pile head and the pile body, so that the strength of the joint can be enhanced, and the pulling resistance can be improved; the pile toe is provided with the convex edge groove, so that the soil breaking effect can be enhanced, the slurry discharge is facilitated, and the bearing capacity of a pile foundation is improved. The bearing platform supporting structure comprises the buttress, the distribution beam, the surface type jack and the cushion block, can reduce the damage to the bearing platform and is convenient to recycle. The pre-reinforcing device and the construction method thereof can improve the bearing capacity of the foundation before drilling and grouting, effectively reduce the disturbance of subsequent drilling and grouting reinforcement on the transmission terminal tower, and ensure the safety and stability of the pile foundation repair operation of the transmission terminal tower.
Description
Technical Field
The invention relates to the technical field of pile foundation reinforcement, in particular to a pre-reinforcing device for repairing a transmission terminal tower pile foundation and a construction method thereof.
Background
With the rapid development of economy in China, the electricity consumption in China is larger and larger, people have stronger and stronger dependence on electricity, and the number of transmission terminal towers is increased gradually. However, as time goes on, under the influence of groundwater erosion, earthquake action and the like, the bearing capacity of the pile foundation of the original transmission terminal tower is gradually reduced, if the transmission terminal tower is dismantled and rebuilt, large-scale power failure is inevitably caused, and a large amount of manpower and material resources are consumed, so that the pile foundation of the original transmission terminal tower is reinforced urgently.
Traditional pile foundation consolidates and adopts artifical or mechanical slip casting mode, need drill in the surface of original pile foundation at the in-process that carries out the slip casting and consolidate, can produce great disturbance to upper portion building or structure among the drilling process, then probably lead to electric tower upper portion electric wire to produce bad consequences such as lax, fracture, cause casualties and economic loss, consequently before carrying out the slip casting and consolidating, should carry out the pre-consolidation to it.
Disclosure of Invention
The invention aims to provide a pre-reinforcing device for repairing a pile foundation of a transmission terminal tower and a construction method thereof, which can improve the bearing capacity of the pile foundation before grouting reinforcement through pre-reinforcement, effectively reduce the disturbance of subsequent grouting reinforcement on the transmission terminal tower and ensure the safety and stability of subsequent operation.
In order to achieve the purpose, the invention adopts the following technical scheme:
a pre-reinforcing device for repairing a pile foundation of a power transmission terminal tower comprises bamboo joint pipe piles and a bearing platform supporting structure.
The bamboo joint pipe pile comprises a pile cap, a pile head, a pile body and a pile tip which are arranged in sequence; the pile head and the pile body are both provided with a plurality of grouting holes; and the outer side wall of the pile tip is provided with a plurality of convex edge grooves.
The bearing platform supporting structure comprises a distribution beam, a surface jack positioned above the distribution beam and a buttress positioned below the distribution beam; the buttress comprises a limiting groove, an adjusting rod, a pressure bracket, a pressure spring and a bottom plate which are sequentially arranged from top to bottom; pier feet with adjustable heights are arranged at the end corners of the bottom plate; and a shell is arranged on the outer sides of the pressure bracket and the pressure spring. The bottom of the limiting groove is connected with the upper part of the adjusting rod, and the lower part of the adjusting rod is connected with the top of the pressure bracket; the bottom of the pressure bracket is connected with the upper end of the pressure spring; the lower end of the pressure spring is connected with the bottom plate.
Furthermore, the device still includes grouting equipment, grouting equipment includes grouting pump and the slip casting pipe that is arranged in to the slip joint tubular pile slip casting that links to each other with the slip casting pump export.
Further, the pile tip comprises a tubular connecting part I and a conical connecting part II welded at the lower end of the connecting part I; the convex edge grooves are formed along the bus direction of the second connecting part, the number of the convex edge grooves is four, and the convex edge grooves are uniformly distributed along the periphery of the second connecting part; the convex edge groove is in a triangular pyramid structure with a narrow outer side caliber and a wide inner side caliber.
Furthermore, the grouting hole on the pile head is positioned at the lower end of the pile head; the grouting holes in the pile body are respectively arranged at the upper end and the lower end of the pile body; the quantity of pile body is at least one, and when the quantity of pile body was greater than one, each slip casting hole staggered distribution of adjacent pile body junction.
Furthermore, the limiting groove is arranged corresponding to the distribution beam.
The invention also relates to a construction method of the pre-reinforcing device for repairing the pile foundation of the transmission terminal tower, which comprises the following steps:
s1, preparation: determining a pre-reinforcing position according to design requirements, and excavating a proper trapezoidal groove at the arrangement position of the bearing platform supporting structure according to requirements; after the trapezoid-shaped groove is dug, the excavated surface is subjected to guniting and plastering reinforcement, the stability of the working surface is enhanced, and the smoothness of the working surface is ensured.
S2, pile toe prepressing: manually pre-pressing the pile tip according to the pre-fixing point determined in the step S1 to enable the pile tip to be vertical to the ground, and stopping pre-pressing after the pile tip is pressed into 3/4 of the ground; digging grooves on two sides of the pile body, installing support piers in the grooves, arranging the distribution beam in the limiting groove, placing a meter type jack on the distribution beam, and respectively adjusting the heights of pier feet and the meter type jack so as to enable the jack to be in contact with the bottom of the bearing platform.
S3, pile pressing: placing a pile body above the pile tip, welding and connecting the pile body and the pile tip, and then adjusting the height of a jack to enable the distribution beam to be in contact with the top of the pile body; pile pressing operation is carried out by using the gauge type jack, and after pile pressing is finished, the height of the gauge type jack is adjusted to be restored to an initial state; according to the reading of a pressure gauge, when the requirement of the upper bearing capacity is not met, pile extension and pile pressing are continued until the requirement of the upper load is met, finally, a pile head and a pile body are welded, and pile pressing is stopped after the pile head is pressed into 1/3 of the pile body; it is necessary to correct the perpendicularity of the pile at the beginning of the pressurization of each pile.
S4, grouting reinforcement: after the pile body is placed, the grouting pipe is placed from the pile head, and cement grout which is prepared in advance is injected for pressurized grouting.
S5, pouring and backfilling: after grouting, recovering the bearing platform supporting structure, and covering a pile cap on the top of the pile head; building a template in the pile head area, and pouring concrete to connect the pile head with a bearing platform; and after the pouring is finished, backfilling the tamped trapezoidal groove and cleaning the site.
And S6, repeating the steps S1-S5, and performing pre-reinforcing operation symmetrically around the bearing platform, wherein the surface jacks, the buttresses, the distribution beams and the grouting equipment are operated in a turnover mode.
S7, pile foundation drilling grouting repair: and after the pre-reinforcement is finished and the strength of the bamboo joint pipe pile is exerted to 80%, drilling, grouting and repairing are carried out on the pile foundation of the bearing platform.
Compared with the prior art, the invention has the advantages that:
(1) The method can perform pre-reinforcement before grouting reinforcement, and can reduce the damage of the transmission terminal tower caused by grouting drilling disturbance while increasing the bearing capacity of the foundation. The invention provides counter force by using the original foundation, does not need large-scale mechanical equipment, can reduce potential safety hazard, and lays a good foundation for grouting reinforcement of the transmission terminal tower.
(2) According to the invention, the outer wall of the pile tip is provided with the plurality of convex edge grooves, so that the pile tip soil breaking capacity can be effectively improved, the pile pressing resistance is reduced, and the damage to the upper bearing platform is reduced; meanwhile, soil bodies can be prevented from entering the pile pressing process, and during grouting, slurry can be smoothly discharged to a near soil layer, so that the bearing capacity of the pile foundation is improved. According to the invention, the grouting holes are formed in the pile bodies, and particularly the grouting holes which are distributed in a staggered manner are formed in the joints of the adjacent pile bodies, so that an annular reinforcing body can be formed, the strength of the joints is increased, and the pulling resistance of the bamboo joint pipe pile can be improved.
(3) According to the invention, the distribution beam is fixed by adopting the limiting groove, so that the displacement of the distribution beam can be limited, the distribution beam is kept horizontal, the pressure of the jack is uniformly applied to the bamboo joint pipe pile, and the pressing-in of the bamboo joint pipe pile vertical to the ground is ensured.
(4) According to the pre-reinforcement measure adopted in the early-stage operation of the transmission terminal tower pile foundation repair, the specially-made small-diameter bamboo joint pipe pile pressing process has small disturbance on the pile foundation of the bearing platform, the bearing capacity of the foundation can be improved on the premise of drilling and grouting, the disturbance of the follow-up drilling and grouting reinforcement on the transmission terminal tower is effectively reduced, and the safety and stability of the transmission terminal tower pile foundation repair operation are ensured.
(5) The buttress provided by the invention can realize the pile pressing operation by pressing the adjusting rod into the shell when the upper part is loaded; when the upper load is reduced, the adjusting rod can automatically recover to the initial state under the action of the elastic force of the pressure spring, and an operation space is provided for installing and welding the next pile body.
(6) In order to realize the pre-reinforcement operation of repairing the pile foundation of the transmission tower bearing platform, the small-diameter bamboo joint pipe pile pressing construction needs to be carried out, but the traditional large-scale pile pressing equipment cannot adapt to the pre-reinforcement operation, and the upper electric tower structure can be damaged due to too large construction disturbance.
Drawings
FIG. 1 is a schematic view of a pre-emphasis apparatus according to the present invention;
FIG. 2 is a schematic view of the pier;
FIG. 3 is a schematic structural view of a bamboo joint pipe pile;
FIG. 4 is a schematic view of the construction of the stake point;
FIG. 5 is a schematic cross-sectional view of a grouting stage during a grouting operation using the present invention;
FIG. 6 is a schematic illustration of the pre-consolidation effect of the pre-consolidation operation performed using the present invention.
Wherein:
1. bearing platform, 2, table jack, 3, bamboo joint tubular pile, 31, pile cap, 32, pile head, 33, grouting hole, 34, pile body, 35, pile tip, 4, buttress, 41, limiting groove, 42, pressure bracket, 43, pressure spring, 44, pier foot, 45, adjusting rod, 46, shell, 47, bottom plate, 5, distribution beam, 6, cushion block, 7, grouting pump, 8, grouting pipe, 9 and trapezoid groove.
Detailed Description
The invention is further described with reference to the accompanying drawings:
as shown in fig. 1 and 5, the pre-reinforcing device for repairing the pile foundation of the transmission terminal tower and the construction method thereof comprise a bamboo joint pipe pile 3, a bearing platform supporting structure and grouting equipment. And (4) excavating a trapezoidal groove 9 at the arrangement position of the bearing platform supporting structure for placing the bearing platform supporting structure. The grouting equipment comprises a grouting pump 7 and a grouting pipe 8.
As shown in fig. 3, the bamboo tube pile 3 includes a pile cap 31, a pile head 32, a pile body 34, and a pile tip 35. The lower end of the pile head 32 is provided with a grouting hole 33, and the upper end is not provided with the grouting hole 33. And grouting holes 33 are formed in the upper end and the lower end of the pile body 34. The number of shaft 34 is at least 1. When the number of the pile bodies is more than 1, two rows of mutually staggered grouting holes 33 are arranged at the joint of the adjacent pile bodies 34. When the pile bodies 34 are connected, the grouting holes 33 of the two pile bodies are arranged in a staggered mode. During grouting, cement slurry flows out of the grouting holes 33 at the joints to form annular reinforcing bodies, so that the strength of the joints can be effectively increased.
As shown in fig. 4, the pile tip 35 is formed by welding a section of conical structure (i.e., the second connecting part) and a section of tubular structure (i.e., the first connecting part). Four rib grooves 37 which are uniformly distributed and extend along the direction of the second bus of the connecting part are formed in the outer wall of the second connecting part. The convex edge groove 37 is a triangular pyramid structure with a narrow outer diameter and a wide inner diameter. Convex edge groove 37 can improve pile toe ability of breaking ground effectively, reduces the pile driving resistance, can prevent simultaneously that the pile driving in-process soil body from getting into, is favorable to the slip casting process thick liquid to be discharged to closing on the soil layer, improves pile foundation bearing capacity.
As shown in fig. 1 and 2, the cap support structure includes a buttress 4, a jack-watch 2, a distribution beam 5, and a spacer 6. Two buttresses 4 are symmetrically arranged in the trapezoidal groove 9; the distribution beam 5 is placed at the upper part of the buttress 4; the meter type jacks 2 are symmetrically distributed on the distribution beam 5, and the upper ends of the meter type jacks are connected with the bottom surface of the bearing platform 1. The buttress 4 comprises a shell 46, a buttress foot 44, a pressure spring 43, an adjusting rod 45, a pressure bracket 42 and a limiting groove 41. Pier 4 arranges 4 pier feet 44 that are used for adjusting the pier height, and pier foot 44 includes screw rod and bolt, through changing bottom plate and the hookup location of screw rod, can adjust the height of whole pier. The bottom plate 47 is connected to the lower portion of the housing 46. The upper end of the pressure spring 43 is connected to the bottom of the pressure bracket 42, and the lower end is connected to the bottom of the housing 46. The top of the pressure bracket is connected with an adjusting rod 45. The upper part of the adjusting rod 45 is connected with the limiting groove 41. The limiting groove 41 comprises two parallel vertical plates for fixing the distribution beam 5. Between the distribution beam 5 and the pile head 31, a spacer block 6 is arranged. And the cushion block 6 is used for protecting the pile head so as to reduce local deformation. In the pre-reinforcing process, the limiting groove supports the upper structure to limit the displacement of the distribution beam. The pressure bracket is used for connecting the adjusting rod and the pressure spring. The pressure spring can provide elasticity to support the upper structure, and the loaded compression can realize pile pressing operation by adjusting the length of the adjusting rod exposed out of the shell.
The invention also relates to a construction method of the pre-reinforcing device for repairing the pile foundation of the transmission terminal tower, which comprises the following steps:
s1, preparation: determining a pre-reinforcing position according to design requirements, and excavating a proper trapezoidal groove 9 according to requirements; and after the excavation is finished, the excavated surface is subjected to guniting and plastering reinforcement, so that the stability of the working surface is enhanced, and the smoothness of the working surface is ensured.
S2, pile toe prepressing: manually pre-pressing the pile toe 34 according to the pre-fixing point determined in the step S1, enabling the pile toe 34 to be vertical to the ground, and stopping pre-pressing after the pile toe is pressed into 3/4 of the ground; grooves are dug in two sides of the pile body, supporting piers 3 are installed in the grooves, the distribution beam is arranged in the limiting groove 41, the meter type jacks 2 are symmetrically placed on the distribution beam 5, and the heights of the meter type jacks 2 and the pier feet 44 are respectively adjusted, so that the jacks are in contact with the bottom of the bearing platform 1.
S3, pile pressing: placing a pile body 35 above the pile tip 34, welding the pile body 35 and the pile tip 34, and then adjusting the height of the watch jack 2 to enable the distribution beam 5 to be in contact with the top of the pile body 35; pile pressing operation is carried out by using the gauge type jack 2, and after pile pressing is finished, the height of the gauge type jack 2 is adjusted to be restored to an initial state; according to the reading of a pressure gauge, when the requirement of the upper bearing capacity is not met, pile extension and pile pressing are continued until the requirement of the upper load is met, finally the pile head 32 and the pile body 34 are welded, and pile pressing is stopped when the pile head 32 is pressed into 1/3 of the pile body; it is necessary to correct the perpendicularity of the pile at the beginning of the pressurization of each pile.
S4, grouting reinforcement: after the pile body is placed, the grouting pipe 8 is placed from the pile head 32, and cement slurry prepared in advance is injected for pressurization grouting.
S5, pouring and backfilling: after grouting, recovering the bearing platform supporting structure, and covering the top of the pile head 32 with a pile cap 31; building a template in the pile head area, and pouring concrete to connect the pile head 32 with the bearing platform 1; and after pouring is finished, backfilling the tamped trapezoidal groove 9, and cleaning the site.
And S6, repeating the steps S1-S5, and performing pre-reinforcing operation symmetrically on the periphery of the bearing platform, wherein the surface type jacks 2, the buttresses 4, the distribution beams 5 and the grouting equipment can be used in a turnover mode.
S7, pile foundation drilling grouting repair: and after the pre-reinforcement is finished and the strength of the bamboo joint pipe pile is exerted to 80%, drilling, grouting and repairing are carried out on the pile foundation of the bearing platform.
The above-mentioned embodiments are merely illustrative of the preferred embodiments of the present invention, and do not limit the scope of the present invention, and various modifications and improvements of the technical solution of the present invention by those skilled in the art should fall within the protection scope defined by the claims of the present invention without departing from the spirit of the present invention.
Claims (6)
1. The utility model provides a be used for prosthetic pre-reinforcing apparatus of transmission terminal shaft tower pile foundation which characterized in that: comprises bamboo joint pipe piles and a bearing platform supporting structure;
the bamboo joint pipe pile comprises a pile cap, a pile head, a pile body and a pile tip which are arranged in sequence; the pile head and the pile body are both provided with a plurality of grouting holes; the outer side wall of the pile tip is provided with a plurality of convex edge grooves;
the bearing platform supporting structure comprises a distribution beam, a surface jack positioned above the distribution beam and a buttress positioned below the distribution beam; the buttress comprises a limiting groove, an adjusting rod, a pressure bracket, a pressure spring and a bottom plate which are sequentially arranged from top to bottom; pier feet with adjustable heights are arranged at the end corners of the bottom plate; a shell is arranged on the outer sides of the pressure bracket and the pressure spring;
the bottom of the limiting groove is connected with the upper part of the adjusting rod, and the lower part of the adjusting rod is connected with the top of the pressure bracket; the bottom of the pressure bracket is connected with the upper end of the pressure spring; the lower end of the pressure spring is connected with the bottom plate.
2. The pre-reinforcing device for repairing the pile foundation of the transmission terminal tower according to claim 1, characterized in that: the device still includes slip casting equipment, slip casting equipment includes slip casting pump and the slip casting pipe that is arranged in to slip casting in the bamboo joint tubular pile that links to each other with the slip casting pump export.
3. The pre-reinforcing device for repairing the pile foundation of the transmission terminal tower according to claim 1, wherein: the pile tip comprises a tubular connecting part I and a conical connecting part II welded at the lower end of the connecting part I; the four convex edge grooves are uniformly distributed along the periphery of the second connecting part; the convex edge groove is in a triangular pyramid structure with a narrow outer diameter and a wide inner diameter.
4. The pre-reinforcing device for repairing the pile foundation of the transmission terminal tower according to claim 1, wherein: the grouting hole on the pile head is positioned at the lower end of the pile head; the grouting holes in the pile body are respectively arranged at the upper end and the lower end of the pile body; the quantity of pile body is at least one, and when the quantity of pile body was greater than one, each slip casting hole staggered distribution of adjacent pile body junction.
5. The pre-reinforcing device for repairing the pile foundation of the transmission terminal tower according to claim 1, characterized in that: the limiting groove is arranged corresponding to the distribution beam.
6. The construction method of the pre-reinforcing device for repairing the pile foundation of the transmission terminal tower according to any one of claims 1 to 5, wherein: the method comprises the following steps:
s1, preparation: determining a pre-reinforcing position according to design requirements, and excavating a trapezoidal groove at the arrangement position of the bearing platform supporting structure according to requirements; after the trapezoidal groove is dug, carrying out guniting and plastering reinforcement on the dug surface;
s2, pile toe prepressing: manually pre-pressing the pile toe according to the pre-fixing point determined in the step S1 to enable the pile toe to be vertical to the ground, and stopping pre-pressing after the pile toe is pressed into 3/4 of the ground; digging grooves on two sides of the pile body, mounting buttresses in the grooves, arranging the distribution beam in the limiting groove, placing a meter type jack on the distribution beam, and respectively adjusting the heights of a pier foot and the meter type jack so as to enable the jack to be in contact with the bottom of the bearing platform;
s3, pile pressing: placing a pile body above the pile tip, welding and connecting the pile body and the pile tip, and then adjusting the height of a jack to enable the distribution beam to be in contact with the top of the pile body; carrying out pile pressing operation by using a gauge type jack, and after pile pressing is finished, adjusting the height of the gauge type jack to recover to an initial state; according to the reading of a pressure gauge, when the requirement of the upper bearing capacity is not met, pile extension and pile pressing are continued until the requirement of the upper load is met, finally, a pile head and a pile body are welded, and pile pressing is stopped after the pile head is pressed into 1/3 of the pile body; correcting the verticality of each pile when each pile begins to be pressurized;
s4, grouting reinforcement: after the pile body is placed, the grouting pipe is placed from the pile head, and cement slurry prepared in advance is injected for pressurized grouting;
s5, pouring and backfilling: after grouting, recovering the bearing platform supporting structure, and covering a pile cap on the top of the pile head; building a template in the pile head area, and pouring concrete to connect the pile head with a bearing platform; after pouring is finished, backfilling the tamped trapezoidal groove, and cleaning the site;
s6, repeating the steps S1-S5, and symmetrically performing pre-reinforcing operation on the periphery of the bearing platform, wherein the surface jacks, the buttresses, the distribution beams and the grouting equipment are in turnover operation;
s7, pile foundation drilling grouting repair: and (3) after pre-reinforcement is completed, when the bamboo joint pipe pile strength is exerted to 80%, drilling, grouting and repairing operation is carried out on the pile foundation of the bearing platform.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111344443.9A CN114086590B (en) | 2021-11-15 | 2021-11-15 | Pre-reinforcing device for repairing pile foundation of transmission terminal tower and construction method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111344443.9A CN114086590B (en) | 2021-11-15 | 2021-11-15 | Pre-reinforcing device for repairing pile foundation of transmission terminal tower and construction method thereof |
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| CN114086590A CN114086590A (en) | 2022-02-25 |
| CN114086590B true CN114086590B (en) | 2023-01-24 |
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| CN109356210A (en) * | 2018-11-21 | 2019-02-19 | 兰州理工大学 | A kind of pile foundation building inclination rectification cuts stake and underpins position limiting structure and its construction method |
| CN110004998A (en) * | 2019-05-14 | 2019-07-12 | 中国五冶集团有限公司 | A kind of bored concrete pile test pile apparatus and its pile testing method |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA2963531A1 (en) * | 2017-04-05 | 2017-08-15 | Francis Boucher | Building foundation lifting and stabilization device |
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2021
- 2021-11-15 CN CN202111344443.9A patent/CN114086590B/en active Active
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105220720A (en) * | 2015-10-20 | 2016-01-06 | 西安科技大学 | Building foundation, Collapsible Loess District reinforcing pile and pressing pile construction method thereof |
| CN107190768A (en) * | 2017-06-06 | 2017-09-22 | 西安科技大学 | A kind of static pressure pile structure and its construction method for building strengthening of foundation |
| CN206928294U (en) * | 2017-07-01 | 2018-01-26 | 杭州圣基建筑特种工程有限公司 | A kind of counter-force seals stake loading system |
| CN108999227A (en) * | 2018-10-17 | 2018-12-14 | 中核四达建设监理有限公司 | A kind of ruggedized construction and its construction method on building basis |
| CN109356210A (en) * | 2018-11-21 | 2019-02-19 | 兰州理工大学 | A kind of pile foundation building inclination rectification cuts stake and underpins position limiting structure and its construction method |
| CN110004998A (en) * | 2019-05-14 | 2019-07-12 | 中国五冶集团有限公司 | A kind of bored concrete pile test pile apparatus and its pile testing method |
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| CN114086590A (en) | 2022-02-25 |
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