CN108301401B - Construction method for treating defect section of cast-in-place pile by utilizing water grinding drill - Google Patents
Construction method for treating defect section of cast-in-place pile by utilizing water grinding drill Download PDFInfo
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- CN108301401B CN108301401B CN201810022237.8A CN201810022237A CN108301401B CN 108301401 B CN108301401 B CN 108301401B CN 201810022237 A CN201810022237 A CN 201810022237A CN 108301401 B CN108301401 B CN 108301401B
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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
- E02D5/34—Concrete or concrete-like piles cast in position ; Apparatus for making same
Abstract
The invention relates to the technical field of cast-in-place piles, and discloses a construction method for treating a defective section of a cast-in-place pile by using a water mill drill, which comprises the following steps: 1) excavating to the top of the cast-in-place pile; 2) constructing an outer ring groove which is vertically arranged and surrounds the periphery of the middle pile by using a water mill drilling machine, and forming a plurality of cross grooves of the middle pile, wherein the middle pile is divided into middle pile blocks by the plurality of cross grooves, and the middle pile blocks are chiseled out for outward transportation; 3) constructing a plurality of separation seams in the outer ring pile, dividing the outer ring pile into outer ring pile blocks by the plurality of separation seams, and cutting off the stirrups and the reinforcing ribs; 4) constructing a separation seam at the bottom of the outer ring pile, cutting off the exposed main ribs, and chiseling the outer ring pile block for outward transportation; 5) repeating the steps 1) to 4) and breaking layer by layer downwards until the pile body is a defect section; 6) the construction method comprises the following steps of cleaning a defect section of a pile body, lengthening a reinforcement cage, pouring concrete, completing construction treatment of the defect section of the cast-in-place pile, and obtaining the treated cast-in-place pile with good quality, high construction efficiency and low construction cost.
Description
Technical Field
The invention relates to the technical field of cast-in-place piles, in particular to a construction method for treating a defective section of a cast-in-place pile by using a water mill drill.
Background
In the construction process of the cast-in-place pile, common quality problems such as pile body concrete dispersion, pile breakage and the like easily occur due to improper operation of the working procedures, and when the cast-in-place pile is detected and judged to be an unqualified pile, methods such as grouting method reinforcement, re-construction on the original pile position, pile supplement and the like are required to be adopted for treatment.
At present, when the defect position of the pile body is buried deeply or the section is large, the grouting method is difficult to effectively ensure the treatment quality, and the secondary inspection and maintenance time is long; the original pile position is reworked for construction again, and because the concrete strength of the pile body is high and the content of the steel bars is large, the impact drilling consumes long time and high cost, and the construction site is often limited due to the operation with slurry during impact; if the pile repairing scheme is adopted, two piles are needed to replace the original pile, so that the construction progress is slow and the cost is high.
Disclosure of Invention
The invention aims to provide a construction method for treating a defective section of a cast-in-place pile by using a water mill drill, and aims to solve the problems of poor construction quality, low construction efficiency and high construction cost of the traditional construction method in the prior art when a defective section exists in a pile body of the cast-in-place pile.
The invention is realized in this way, utilize the water mill to bore the construction method to process the defective section of the bored concrete pile, the pile body of the bored concrete pile includes the middle part pile located in steel reinforcement cage enclosure and surrounds the outer ring pile in the middle part pile periphery, the said steel reinforcement cage is placed in the said outer ring pile, including the following construction steps:
1) excavating the retaining wall step by step to the top of the cast-in-place pile;
2) utilizing a water mill drilling machine to perform construction drilling between the middle pile and the outer ring pile to form a vertically-arranged outer ring groove surrounding the periphery of the middle pile, wherein the middle pile and the outer ring pile are separated by the outer ring groove; utilizing a water mill drilling machine to construct and drill holes on the middle pile to form a plurality of crossed grooves which are arranged in a crossed mode and are arranged vertically, wherein the crossed grooves are communicated with an outer ring groove, and a steel wedge is embedded into the crossed grooves downwards, so that the middle pile block is pulled apart along a vertical surface, sheared and broken from the bottom of the middle pile block, and the middle pile block is chiseled and transported outwards;
3) the concrete on two sides of the outer ring pile is chiseled by adopting an artificial pneumatic pick to form a partition seam with the width larger than 20cm, the partition seam is arranged in a staggered manner with the main reinforcement of the reinforcement cage, the outer ring pile is divided into a plurality of outer ring pile blocks which are arranged at intervals by the plurality of partition seams, and the stirrups and the reinforcing ribs of the reinforcement cage are exposed through the partition seams to cut off the stirrups and the reinforcing ribs;
4) constructing a horizontally arranged separation seam at the bottom of the outer ring pile, wherein the separation seam is arranged around the circumference of the outer ring pile, and a main reinforcement of a reinforcement cage is exposed through the separation seam, cutting the exposed main reinforcement, and chiseling the outer ring pile block for outward transportation;
5) repeating the steps 1) to 4) and breaking layer by layer downwards until the pile body is a defect section;
6) and cleaning the defect section of the pile body, lengthening the reinforcement cage, pouring concrete, and finishing the construction treatment of the defect section of the cast-in-place pile.
Furthermore, the lengthened reinforcement cage and the original reinforcement cage in the pile body are arranged in a staggered mode.
Further, in the step 2), the isolated middle pile block is squeezed and chiseled off by a method of squeezing the middle pile block.
Further, a plurality of the cross grooves are arranged in a cross shape.
Compared with the prior art, the construction method for processing the defect section of the cast-in-place pile by using the water mill drill provided by the invention has the advantages that the pile body of the cast-in-place pile is broken layer by layer until the defect section is reached, the water mill drill is used for occluding, drilling and coring, the pile body is taken out section by section in the breaking process until the pile body is dug to the position of the defect section, the defect section is removed, and then the pile connecting method is adopted to complete the processing of the defect pile, so that the quality of the cast-in-place pile after the construction processing is better, the construction efficiency is high and the construction cost.
Drawings
FIG. 1 is a schematic flow chart of a construction method for treating a defective section of a cast-in-place pile by using a water mill drill according to an embodiment of the present invention;
FIG. 2 is a schematic top view of an outer ring groove formed between a middle pile and an outer ring pile according to an embodiment of the present invention;
FIG. 3 is a schematic top view of an embodiment of the present invention after construction of a cross slot in a center pile;
FIG. 4 is a schematic top view of a middle pile removed by chiseling in accordance with an embodiment of the present invention;
fig. 5 is a schematic front view of an outer ring pile after a separation seam and a separation seam are constructed according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
The following describes the implementation of the present invention in detail with reference to specific embodiments.
Referring to fig. 1-5, preferred embodiments of the present invention are provided.
The construction method for processing the defect section of the cast-in-place pile by using the water mill drill is used for processing the defect section in the pile body 107 of the cast-in-place pile.
The construction method for processing the defect section of the cast-in-place pile by utilizing the water grinding drill, wherein a pile body 107 of the cast-in-place pile comprises a middle pile 104 positioned in the surrounding of a steel reinforcement cage 103 and an outer ring pile 101 surrounding the periphery of the middle pile 104, and the steel reinforcement cage 103 is formed in the outer ring pile 101; the construction method for treating the defect section of the cast-in-place pile by using the water grinding drill comprises the following construction steps:
1) excavating the retaining wall step by step to the top of the cast-in-place pile in a manual hole digging pile mode;
2) utilizing a water mill drilling machine to perform construction drilling between the middle pile 104 and the outer ring pile 101 to form an outer ring groove 102 which is vertically arranged and surrounds the periphery of the middle pile 104, wherein the outer ring groove 102 separates the middle pile 104 from the outer ring pile 101, so that an empty full section is formed on the periphery of the middle pile 104; utilizing a water mill drilling machine to construct and drill holes on the middle pile 104 to form a plurality of crossed grooves 105 which are arranged in a crossed mode and are arranged vertically, wherein the crossed grooves 105 are communicated with the outer ring groove 102, and the middle pile 104 is divided into a plurality of middle pile blocks 106 which are separated from each other through the plurality of crossed grooves 105; chiseling the middle pile block 106 for outward transportation;
3) constructing a plurality of partition seams 109 which are arranged at intervals and are vertically arranged in the outer ring pile 101, wherein the partition seams 109 and a main reinforcement 110 of the reinforcement cage 103 are arranged in a staggered manner, the outer ring pile 101 is divided into a plurality of outer ring pile blocks which are arranged at intervals by the plurality of partition seams 109, and stirrups 111 and reinforcing ribs of the reinforcement cage 103 are exposed through the partition seams 109 to cut the stirrups 111 and the reinforcing ribs;
4) constructing a horizontally-arranged separation seam 108 at the bottom of the outer ring pile 101, wherein the separation seam 108 is arranged around the circumference of the outer ring pile 101, main reinforcements 110 of the reinforcement cage 103 are exposed through the separation seam 108, the exposed main reinforcements 110 are cut off, an outer ring pile block is removed by chiseling and is transported outwards, and the first layer of pile body 107 of the cast-in-place pile is removed;
5) repeating the steps, and breaking layer by layer downwards until the defect section of the pile body 107 is reached;
6) and cleaning the defect section of the pile body 107, lengthening the reinforcement cage 103 and pouring concrete to finish the construction treatment of the defect section of the cast-in-place pile.
According to the construction method for processing the defect section of the cast-in-place pile by using the water mill drill, the pile body 107 of the cast-in-place pile is broken layer by layer until the defect section is reached, in the breaking process, the water mill drill is used for occluding, drilling and coring, the pile body 107 is taken out section by section in a layering mode until the position of the defect section is dug, the defect section is removed, and then the pile splicing method is used for completing the processing of the defect pile, so that the cast-in-place pile after construction processing is good in quality, high in construction efficiency and low in construction cost.
In the above step 2), by constructing a plurality of first vertical holes between the middle pile 104 and the outer ring pile 101, the plurality of first vertical holes are arranged around the periphery of the middle pile 104, and the adjacent first vertical holes are nested with each other, and the plurality of first vertical holes are formed around the outer ring groove 102, so that the construction of the outer ring groove 102 is facilitated, and the outer ring pile 101 is better isolated from the middle pile 104.
In the above step 2), by constructing a plurality of second vertical holes on the middle pile 104, the plurality of second vertical holes are arranged in a row, and adjacent second vertical holes are nested with each other, and the plurality of second vertical holes are arranged to form the above-mentioned cross groove 105, so that the construction of the cross groove 105 is facilitated. A plurality of crossing grooves 105 are formed in the middle pile by constructing a plurality of second vertical holes a plurality of times, the plurality of crossing grooves 105 being arranged in a crossing manner.
In this embodiment, the separated middle pile blocks 106 are broken by squeezing and chiseling off the middle pile blocks 106.
As a preferred embodiment, a steel wedge is embedded in the cross groove 105, and the steel wedge is embedded downwards, so that the middle pile blocks 106 are subjected to vertical pulling force and horizontal shearing force simultaneously; when the extrusion force is larger than the sum of the ultimate tensile force and the ultimate shearing force, the middle pile block 106 is pulled apart along the vertical surface and is sheared and broken from the bottom, so that the middle pile block 106 is separated from the pile body 107.
In this embodiment, the cross grooves 105 drilled by the water mill drilling machine in the middle pile 104 are arranged in a cross shape, so that the middle pile 104 forms four equally-divided middle pile blocks 106, which is convenient for taking out the middle pile blocks 106.
The steel wedge is arranged in the cross groove 105 in a conical mode, the steel wedge is hammered to extrude the middle pile block 106, the middle pile block 106 is enabled to be simultaneously under the action of lead vertical pulling force and horizontal shearing force, when the extrusion force is larger than the sum of ultimate tensile force and ultimate shearing force, the middle pile block 106 is vertically pulled apart and is sheared and broken from the bottom, a plurality of middle pile blocks 106 on the layer are separated from the bottom pile body 107, then the middle pile block 106 after chiseling is hoisted out of a pile hole by a winch, and the middle pile 104 on the first layer is completely broken.
Through setting up the partition seam 109, divide into six equally outer loop pile 101, use six partition seams 109 as the center, both sides respectively extend 10cm, chiseling the both sides concrete that separates partition seam 109 with artifical pneumatic pick, form six wide 20cm and vertical arrangement's partition seam 109, expose stirrup 111 and the strengthening rib of steel reinforcement cage 103.
The reinforcing ribs and the stirrups 111 of the reinforcement cage 103 exposed out of the outer ring pile 101 are cut by using oxyacetylene, so that the outer ring pile 101 is in a block shape to be taken out individually.
Chiseling a circle of 20cm wide concrete at the bottom of the outer ring pile 101 along the periphery of the outer ring pile 101 to form a separation seam 108, breaking off a main rib 110 exposed in the separation seam 108 by welding to break off the concrete of the outer ring pile 101 and a reinforcement cage 103 from a pile body 107, and transporting out of a pile hole by using a winch; and by analogy, excavating layer by layer to the defect position of the pile body 107.
The method comprises the following steps of sequentially carrying out cyclic working procedures of coring, breaking and concrete block taking according to layering and sectioning until the middle pile 104 and the outer ring pile 101 at the position of a defect section and the upper part of the defect section are removed and transported outwards in sections, removing the defect section, carrying out steel reinforcement cage 103 lengthening and pile body 107 concrete pouring after acceptance, staggering 50% of lengthened main reinforcements 110 when the steel reinforcement cage 103 is lengthened, improving the concrete strength of the pile body 107 by one grade compared with the concrete strength of the originally designed pile body 107, and leaving the pile body 107 concrete test block for detection after the concrete pouring of the pile body 107 is finished, so that the whole defect pile is treated.
In this embodiment, the elongated reinforcement cage 103 and the original reinforcement cage in the pile body 107 are arranged in a staggered manner. In addition, the main reinforcement of the lengthened reinforcement cage 103 is mainly arranged in a staggered manner with the original main reinforcement in the pile body 107.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (4)
1. The construction method for treating the defect section of the cast-in-place pile by using the water mill drill is characterized in that a pile body of the cast-in-place pile comprises a middle pile located in the surrounding of a reinforcement cage and an outer ring pile surrounding the periphery of the middle pile, the reinforcement cage is arranged in the outer ring pile, and the construction method comprises the following construction steps:
1) excavating the retaining wall step by step to the top of the cast-in-place pile;
2) utilizing a water mill drilling machine to perform construction drilling between the middle pile and the outer ring pile to form a vertically-arranged outer ring groove surrounding the periphery of the middle pile, wherein the middle pile and the outer ring pile are separated by the outer ring groove; utilizing a water mill drilling machine to construct and drill holes on the middle pile to form a plurality of crossed grooves which are arranged in a crossed mode and are arranged vertically, wherein the crossed grooves are communicated with an outer ring groove, and a steel wedge is embedded into the crossed grooves downwards, so that the middle pile block is pulled apart along a vertical surface, sheared and broken from the bottom of the middle pile block, and the middle pile block is chiseled and transported outwards;
3) the concrete on two sides of the outer ring pile is chiseled by adopting an artificial pneumatic pick to form a partition seam with the width larger than 20cm, the partition seam is arranged in a staggered manner with the main reinforcement of the reinforcement cage, the outer ring pile is divided into a plurality of outer ring pile blocks which are arranged at intervals by the plurality of partition seams, and the stirrups and the reinforcing ribs of the reinforcement cage are exposed through the partition seams to cut off the stirrups and the reinforcing ribs;
4) constructing a horizontally arranged separation seam at the bottom of the outer ring pile, wherein the separation seam is arranged around the circumference of the outer ring pile, and a main reinforcement of a reinforcement cage is exposed through the separation seam, cutting the exposed main reinforcement, and chiseling the outer ring pile block for outward transportation;
5) repeating the steps 1) to 4) and breaking layer by layer downwards until the pile body is a defect section;
6) and cleaning the defect section of the pile body, lengthening the reinforcement cage, pouring concrete, and finishing the construction treatment of the defect section of the cast-in-place pile.
2. The construction method for processing the defective section of the cast-in-place pile by using the water mill drill as claimed in claim 1, wherein the lengthened reinforcement cage is arranged in a staggered manner with the original reinforcement cage in the pile body.
3. The construction method for processing the defective section of the cast-in-place pile by using the water mill drill as claimed in claim 2, wherein in the step 2), the isolated middle pile block is broken and removed by breaking the middle pile block.
4. The construction method for processing the defective section of the cast-in-place pile by using the water mill drill according to any one of claims 1 to 3, wherein a plurality of the cross grooves are poorly arranged in a cross shape.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810022237.8A CN108301401B (en) | 2018-01-10 | 2018-01-10 | Construction method for treating defect section of cast-in-place pile by utilizing water grinding drill |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810022237.8A CN108301401B (en) | 2018-01-10 | 2018-01-10 | Construction method for treating defect section of cast-in-place pile by utilizing water grinding drill |
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| CN108301401A CN108301401A (en) | 2018-07-20 |
| CN108301401B true CN108301401B (en) | 2019-12-24 |
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| CN114277790B (en) * | 2021-12-16 | 2023-08-25 | 深圳市工勘岩土集团有限公司 | Repairing and processing method for defect filling pile |
| CN114319360B (en) * | 2021-12-16 | 2023-05-23 | 深圳市工勘岩土集团有限公司 | Method for chiseling middle part of defect filling pile |
| CN114277789B (en) * | 2021-12-16 | 2023-05-23 | 深圳市工勘岩土集团有限公司 | Pile-in-pile structure formed based on defect filling pile construction |
| CN114561951A (en) * | 2022-03-21 | 2022-05-31 | 陈政杰 | Method for excavating and breaking middle part of defective cast-in-place pile |
| CN115198750B (en) * | 2022-06-21 | 2023-09-19 | 中交二公局铁路建设有限公司 | Cast-in-place pile head blocking and cutting device and method |
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| JP4373824B2 (en) * | 2004-03-16 | 2009-11-25 | 東日本旅客鉄道株式会社 | Joining method of cast-in-place pile and steel pipe column |
| CN102926385A (en) * | 2012-11-21 | 2013-02-13 | 江苏省交通工程集团有限公司 | Method for treating pile-forming mud-clamping defect of large-diameter filling pile of bridge |
| CN103452114A (en) * | 2013-09-23 | 2013-12-18 | 甘肃路桥建设集团有限公司 | Bridge cast-in-place pile head chiseling method |
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| 高速铁路大直径超深钻孔灌注桩缺陷处理;王亚国;《铁道建筑》;20171031;第57卷(第10期);第31-32页第3节 * |
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