CN115094880B - Reinforcing method for fracture of support filling pile in pile anchor support structure - Google Patents
Reinforcing method for fracture of support filling pile in pile anchor support structure Download PDFInfo
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- CN115094880B CN115094880B CN202210961704.XA CN202210961704A CN115094880B CN 115094880 B CN115094880 B CN 115094880B CN 202210961704 A CN202210961704 A CN 202210961704A CN 115094880 B CN115094880 B CN 115094880B
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- 238000000034 method Methods 0.000 title claims abstract description 24
- 230000003014 reinforcing effect Effects 0.000 title claims abstract description 22
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 26
- 239000010959 steel Substances 0.000 claims abstract description 26
- 238000010276 construction Methods 0.000 claims abstract description 18
- 238000004873 anchoring Methods 0.000 claims abstract description 8
- 239000004567 concrete Substances 0.000 claims abstract description 7
- 239000004576 sand Substances 0.000 claims description 10
- 230000035515 penetration Effects 0.000 claims description 3
- 239000011150 reinforced concrete Substances 0.000 claims description 3
- 238000003756 stirring Methods 0.000 claims description 3
- 230000002787 reinforcement Effects 0.000 abstract description 7
- 239000002689 soil Substances 0.000 description 6
- 230000000149 penetrating effect Effects 0.000 description 5
- 239000010438 granite Substances 0.000 description 3
- 239000010802 sludge Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
Classifications
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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
- E02D15/00—Handling building or like materials for hydraulic engineering or foundations
-
- 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
- E02D5/74—Means for anchoring structural elements or bulkheads
- E02D5/76—Anchorings for bulkheads or sections thereof in as much as specially adapted therefor
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/20—Hydro energy
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- Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- Piles And Underground Anchors (AREA)
Abstract
The invention discloses a method for reinforcing a support filling pile fracture in a pile anchor support structure, which relates to the technical field of support filling pile fracture reinforcement, and solves the problems that the support filling pile fracture in the existing pile anchor support structure needs foundation pit backfill for construction again, the engineering quantity is huge and the construction period is long, and the method comprises the following steps: backfilling back-pressure earthwork in the foundation pit of the broken area of the support pile; constructing and arranging a first anchor cable, and excavating earthwork in layers after arranging the first anchor cable; a second anchor cable is additionally arranged in construction, and the upper half part of the high waist beam is poured; after the first anchor rope anchoring body reaches strength and is tensioned, excavating earthwork in a layered and partitioned mode, binding the steel bars of the lower half part of the high waist beam, connecting the steel bars with the steel bars of the upper half part, and pouring concrete of the lower half part; and tensioning the second anchor cable. The method has the characteristics of small utilization space, no influence on the construction of the main structure, low engineering cost, and capability of forming a whole with the original supporting structure during supporting, thereby achieving the function of supporting the foundation pit.
Description
Technical Field
The invention relates to the technical field of support filling pile fracture reinforcement, in particular to a reinforcement method for support filling pile fracture in a pile anchor support structure.
Background
The foundation pit adopts a support type of 'upper slope placing, filling piles, two pre-stressed anchor cables with enlarged heads and stirring pile reinforcement in a passive area', wherein the first anchor cable is positioned at the position of a crown beam, and the second anchor cable is positioned at the position of a waist beam. Due to factors such as construction overexcavation, the second anchor cable of the original design of a part of the support section breaks off and fails, the waist beam falls off, a plurality of support piles are broken, the appearance forms are that the cast-in-place pile concrete is cracked, part of pile longitudinal ribs are exposed, and the longitudinal ribs and the stirrups are not obviously damaged. In particular, in: in geology such as plain filled soil, silt, fine sand, powdery clay, medium sand, mucky soil, sandy cohesive soil, fully weathered granite layers, strong weathered granite layers, medium weathered granite layers and the like, and in the geology, cast-in-place pile concrete cracking easily occurs.
The damaged supporting structure needs to be repaired and reinforced, if the traditional foundation pit backfilling is adopted for re-construction, the project pile reconstruction scheme is damaged, the project amount is huge, and the construction period is long; if the foundation pit is adopted, the inner side of the foundation pit is close to the original pile position edge and is additionally provided with the filling pile for reinforcement, the construction of the main basement is affected, and the construction is difficult and the cost is high. Therefore, a method for reinforcing the fracture of the support filling pile in the pile anchor support structure is provided.
Disclosure of Invention
The invention aims to provide a method for reinforcing a broken support filling pile in a pile anchor support structure, which solves the problems that the broken support filling pile in the existing pile anchor support structure needs to be subjected to foundation pit backfill and re-construction, and the project pile reconstruction scheme is damaged, so that the project amount is huge and the construction period is long.
In order to achieve the above purpose, the present invention provides the following technical solutions: a method for reinforcing a broken support filling pile in a pile anchor support structure comprises the following steps:
s1: backfilling back-pressure earthwork to 4.5m elevation in a foundation pit of a support pile fracture area, wherein the foundation pit adopts: the foundation pit is in a supporting type of upper slope placing, filling piles, two expanded head prestressed anchor cables and stirring piles in a passive area, the elevation of the top of the foundation pit is 7.5m, the elevation of the bottom of the foundation pit is-1.5 m, the upper slope placing height is 1m, the slope bottom is a crown beam, the foundation pit supporting piles are broken at the elevation of 2.5m of the foundation pit, and 3m high reinforced concrete high waist beams are arranged at the broken positions of the supporting piles;
s2: the first anchor cable is additionally arranged in construction, earthwork is excavated to 3.5m elevation in a layered mode after the first anchor cable is additionally arranged, and the first anchor cable is positioned at the upper half part of the high waist beam;
s3: a second anchor cable is additionally arranged in construction, the upper half part of the high waist beam is poured, connecting steel bars of the lower half part of the high waist beam are reserved, and the second anchor cable is positioned at the lower half part of the high waist beam;
s4: after the first anchor rope anchoring body added reaches the strength and is tensioned, excavating earthwork to 1.5m elevation in a layered and partitioned mode, binding the steel bars of the lower half part of the high waist beam, connecting the steel bars with the steel bars of the upper half part, and pouring concrete of the lower half part;
s5: stretching the second anchor cable, excavating earth to the bottom of the foundation pit in layers, and constructing the basement structure.
Preferably, in the step S1, when the foundation pit is excavated in plain filling soil and silt, the foundation pit bottom is located in the silt layer.
Preferably, the upper half part of the high waist beam in S3 corresponds to the lower half part of the high waist beam in size, the overall size of the high waist beam is 3000 x 500mm, and the upper half part of the high waist beam is 200mm apart from the lower half part of the high waist beam.
Preferably, the first anchor cable in the step S2 is a 3*7 phi 5mm steel strand, the axial tension standard value is 360KN, the prestress is 300KN, the length is 41m, @2800, the length of the enlarged head section is 7m, the aperture of the enlarged head section is 500mm, and the penetrating sludge enters a middle sand layer and is not less than 3.0m and the total weathering is not less than 3.0m.
Preferably, the second anchor cable in the step S3 is a 3*7 phi 5mm steel strand, the axial tension standard value is 330KN, the prestress is 300KN, the length is 38m, @2800, the length of the enlarged head section is 7m, the aperture of the enlarged head section is 500mm, and the penetration of the sludge into the middle sand layer is not less than 3.0m and the total weathering is not less than 3.0m.
Compared with the related art, the method for reinforcing the breakage of the support filling pile in the pile anchor support structure has the following beneficial effects:
1. the invention provides a method for reinforcing a support filling pile fracture in a pile anchor support structure, which is characterized in that an upper anchor rope and a lower anchor rope are used for fixing a high waist beam, so that the effect of reinforcing the support pile is achieved, and meanwhile, the support filling pile and the original support structure can form a whole, and the foundation pit support effect is achieved.
2. The invention provides a method for reinforcing the fracture of a support filling pile in a pile anchor support structure, which has the advantages of small utilization space, no influence on the construction of a main basement structure and low engineering cost.
Drawings
Fig. 1 is a schematic structural view of a high waist beam and two anchor cables of a method for reinforcing a broken support cast-in-place pile in a pile-anchor support structure according to the present invention.
Fig. 2 is an expanded view of a reinforcement area of a method for reinforcing a break of a cast-in-place pile in a pile-anchor supporting structure according to the present invention.
Fig. 3 is a schematic sectional view of a reinforced area of a method for reinforcing a break of a cast-in-place pile in a pile-anchor supporting structure according to the present invention.
Fig. 4 is an enlarged view at a in fig. 3.
Fig. 5 is a structural view of a high wale of a method for reinforcing a break of a cast-in-place pile in a pile anchor supporting structure according to the present invention.
Fig. 6 is a schematic diagram of a reinforcement structure in a high-waist beam for a method for reinforcing a broken pile in a pile anchor supporting structure according to the present invention.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the invention; all other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Embodiment one:
referring to fig. 1-6, the present invention provides a technical solution: a method for reinforcing a broken support filling pile in a pile anchor support structure comprises the following steps:
s1: backfilling back-pressure earthwork in a foundation pit of a broken area of the support pile to 4.5m elevation;
s2: constructing and arranging a first anchor rope, and excavating earthwork to 3.5m elevation in layers after arranging the first anchor rope;
s3: a second anchor cable is additionally arranged in construction, the upper half part of the high waist beam is poured, and connecting steel bars of the lower half part of the high waist beam are reserved;
s4: after the first anchor rope anchoring body added reaches the strength and is tensioned, excavating earthwork to 1.5m elevation in a layered and partitioned mode, binding the steel bars of the lower half part of the high waist beam, connecting the steel bars with the steel bars of the upper half part, and pouring concrete of the lower half part;
s5: stretching the second anchor cable, excavating earth to the bottom of the foundation pit in layers, and constructing the basement structure.
In S1, the foundation pit adopts: the top of the foundation pit is 7.5m, the bottom elevation of the foundation pit is-1.5 m, the upper slope is 1m, the slope bottom is a crown beam, the first anchor cable is positioned at the position of the crown beam, and the top elevation of the crown beam is 6.5m; the second anchor cable is positioned at the waist beam position, the elevation of the top of the waist beam is 2.5m, and the foundation pit supporting pile is broken at the elevation of 2.5 m.
And S1, excavating plain filling soil and silt in the foundation pit, wherein the bottom of the foundation pit is positioned in a silt layer.
And S3, the upper half part of the high waist beam and the lower half part of the high waist beam are correspondingly consistent in size, the overall size of the high waist beam is 3000 x 500mm, and the upper half part of the high waist beam and the lower half part of the high waist beam are 200mm apart.
In S2, the first anchor cable is a 3*7 phi 5mm steel strand, the axial tension standard value is 360KN, the prestress is 300KN, the length is 41m (the non-anchoring section is a free section), @2800, the length of the enlarged head section is 7m, the aperture of the enlarged head section is 500mm, and the penetrating mud enters a middle sand layer to be not less than 3.0m and the total weathering is not less than 3.0m.
And S3, the second anchor cable is a 3*7 phi 5mm steel strand, the axial tension standard value is 330KN, the prestress is 300KN, the length is 38m (the non-anchoring section is a free section), @2800, the length of the enlarged head section is 7m, the aperture of the enlarged head section is 500mm, and the penetrating mud enters a middle sand layer to be not less than 3.0m and the total weathering is not less than 3.0m.
In the embodiment, according to the original supporting mode and the current condition of the foundation pit, two pre-stressed anchor cables and a high waist beam are adopted to repair and strengthen the supporting structure of the foundation pit. The fracture of the support pile is provided with a 3m high reinforced concrete waist beam, as shown in the attached figure 1 of the specification, a row of anchor cables are respectively arranged at the top and the bottom of the high waist beam, the heights of the two rows of anchor cables are 2m, and the high waist beam is connected with the cast-in-place pile through the planted bars.
Embodiment two:
referring to fig. 1-6, the present invention provides a technical solution: a method for reinforcing a broken support filling pile in a pile anchor support structure comprises the following steps: when the foundation pit is excavated in plain filling soil and silt, the foundation pit bottom is positioned in a silt layer, and the foundation pit structure is as follows: the top of the foundation pit is 7.5m, the bottom elevation of the foundation pit is-1.5 m, the upper slope is 1m, the slope bottom is a crown beam, the first anchor cable is positioned at the position of the crown beam, and the top elevation of the crown beam is 6.5m; the second anchor cable is positioned at the waist beam position, the elevation of the top of the waist beam is 2.5m, and the foundation pit supporting pile is broken at the elevation of 2.5 m.
Backfilling earthwork to 4.5m elevation in a certain range in a foundation pit, constructing an additional first anchor rope at the elevation, excavating earthwork to 3.5m elevation in a layered and partitioned manner, constructing an additional second anchor rope, pouring the upper half part of the high waist beam, reserving connecting steel bars of the lower half part of the high waist beam, excavating earthwork to 1.5m elevation in a layered and partitioned manner after tensioning the additional first anchor rope, binding steel bars of the lower half part of the high waist beam and connecting the steel bars of the upper half part, pouring concrete of the lower half part, tensioning the additional second anchor rope, and finally excavating a construction basement structure at the bottom of the foundation pit.
The upper half part of the high waist beam is correspondingly consistent with the lower half part of the high waist beam in size, wherein the overall size of the high waist beam is 3000 x 500mm, and the upper half part of the high waist beam is 200mm away from the lower half part of the high waist beam; the first anchor cable is a 3*7 phi 5mm steel strand, the axial tension standard value is 360KN, the prestress is 300KN, the length is 41m (the non-anchoring sections are all free sections), @2800, the length of the enlarged head section is 7m, the aperture of the enlarged head section is 500mm, and the penetrating sludge enters a middle sand layer and is not less than 3.0m and the total weathering is not less than 3.0m; the first anchor cable is a 3*7 phi 5mm steel strand, the axial tension standard value is 330KN, the prestress is 300KN, the length is 38m (the non-anchoring sections are all free sections), @2800, the length of the enlarged head section is 7m, the aperture of the enlarged head section is 500mm, and the penetrating mud enters a middle sand layer to be not less than 3.0m and the total weathering is not less than 3.0m.
Claims (5)
1. The method for reinforcing the breakage of the support filling pile in the pile anchor support structure is characterized by comprising the following steps of:
s1: backfilling back-pressure earthwork to 4.5m elevation in a foundation pit of a support pile fracture area, wherein the foundation pit adopts: the foundation pit is in a supporting type of upper slope placing, filling piles, two expanded head prestressed anchor cables and stirring piles in a passive area, the elevation of the top of the foundation pit is 7.5m, the elevation of the bottom of the foundation pit is-1.5 m, the upper slope placing height is 1m, the slope bottom is a crown beam, the foundation pit supporting piles are broken at the elevation of 2.5m of the foundation pit, and 3m high reinforced concrete high waist beams are arranged at the broken positions of the supporting piles;
s2: the first anchor cable is additionally arranged in construction, earthwork is excavated to 3.5m elevation in a layered mode after the first anchor cable is additionally arranged, and the first anchor cable is positioned at the upper half part of the high waist beam;
s3: a second anchor cable is additionally arranged in construction, the upper half part of the high waist beam is poured, connecting steel bars of the lower half part of the high waist beam are reserved, and the second anchor cable is positioned at the lower half part of the high waist beam;
s4: after the first anchor rope anchoring body added reaches the strength and is tensioned, excavating earthwork to 1.5m elevation in a layered and partitioned mode, binding the steel bars of the lower half part of the high waist beam, connecting the steel bars with the steel bars of the upper half part, and pouring concrete of the lower half part;
s5: stretching the second anchor cable, excavating earth to the bottom of the foundation pit in layers, and constructing the basement structure.
2. The method for reinforcing a broken pile in a pile anchor supporting structure according to claim 1, wherein the foundation pit bottom is located in a silt layer when the foundation pit is excavated in the S1.
3. The method for reinforcing a broken pile according to claim 1, wherein the upper half of the high wale in S3 corresponds to the lower half of the high wale in size, the overall size of the high wale is 3000 x 500mm, and the upper half of the high wale is 200mm apart from the lower half of the high wale.
4. The method for reinforcing a broken cast-in-place pile in a pile anchor supporting structure according to claim 1, wherein the first anchor cable in the step S2 is a 3*7 phi 5mm steel strand, the axial tension standard value is 360KN, the prestress is 300KN, the length is 41m, @2800, the length of the enlarged head section is 7m, the aperture of the enlarged head section is 500mm, and the penetration of silt into a middle sand layer is not less than 3.0m and the total weathering is not less than 3.0m.
5. The method for reinforcing a broken pile in a pile-anchor supporting structure according to claim 1, wherein the second anchor cable in the step S3 is a 3*7 Φ5mm steel strand, the axial tension standard value is 330KN, the prestress is 300KN, the length is 38m, @2800, the length of the enlarged head section is 7m, the aperture of the enlarged head section is 500mm, and the penetration of silt into a middle sand layer is not less than 3.0m and the total weathering is not less than 3.0m.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210961704.XA CN115094880B (en) | 2022-08-11 | 2022-08-11 | Reinforcing method for fracture of support filling pile in pile anchor support structure |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210961704.XA CN115094880B (en) | 2022-08-11 | 2022-08-11 | Reinforcing method for fracture of support filling pile in pile anchor support structure |
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| CN115094880B true CN115094880B (en) | 2023-11-17 |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106223334A (en) * | 2016-07-31 | 2016-12-14 | 中国电建集团贵阳勘测设计研究院有限公司 | The restorative procedure of a kind of broken pile and ruggedized construction thereof |
| KR101822175B1 (en) * | 2017-08-23 | 2018-01-25 | 케이투건설 주식회사 | Retaining Wall using Precast Piles and Constructing Method thereof |
| CN114293600A (en) * | 2021-12-22 | 2022-04-08 | 珠海华发人居生活研究院有限公司 | Method for processing broken pile defect of precast pile in weak soil area |
-
2022
- 2022-08-11 CN CN202210961704.XA patent/CN115094880B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106223334A (en) * | 2016-07-31 | 2016-12-14 | 中国电建集团贵阳勘测设计研究院有限公司 | The restorative procedure of a kind of broken pile and ruggedized construction thereof |
| KR101822175B1 (en) * | 2017-08-23 | 2018-01-25 | 케이투건설 주식회사 | Retaining Wall using Precast Piles and Constructing Method thereof |
| CN114293600A (en) * | 2021-12-22 | 2022-04-08 | 珠海华发人居生活研究院有限公司 | Method for processing broken pile defect of precast pile in weak soil area |
Non-Patent Citations (2)
| Title |
|---|
| 复杂环境中深基坑加固技术综合应用;王永华;;施工技术(12);第62-65、106页 * |
| 索道建筑基于桩锚共同作用的悬臂桩加固设计;魏鹏飞;汪子奇;邵远爻;张磊;;探矿工程(岩土钻掘工程)(12);第79-83页 * |
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