CN111622272A - Post-construction process of anti-floating anchor rod - Google Patents
Post-construction process of anti-floating anchor rod Download PDFInfo
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- CN111622272A CN111622272A CN202010494527.XA CN202010494527A CN111622272A CN 111622272 A CN111622272 A CN 111622272A CN 202010494527 A CN202010494527 A CN 202010494527A CN 111622272 A CN111622272 A CN 111622272A
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- 238000007667 floating Methods 0.000 title claims abstract description 185
- 238000010276 construction Methods 0.000 title claims abstract description 81
- 238000000034 method Methods 0.000 title claims abstract description 45
- 229910001294 Reinforcing steel Inorganic materials 0.000 claims abstract description 26
- 239000002002 slurry Substances 0.000 claims abstract description 25
- 238000005553 drilling Methods 0.000 claims abstract description 23
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 15
- 238000004140 cleaning Methods 0.000 claims abstract description 14
- 238000005452 bending Methods 0.000 claims abstract description 8
- 239000010410 layer Substances 0.000 claims description 42
- 239000004568 cement Substances 0.000 claims description 18
- 238000013461 design Methods 0.000 claims description 14
- 229910000831 Steel Inorganic materials 0.000 claims description 12
- 239000010959 steel Substances 0.000 claims description 12
- 238000010586 diagram Methods 0.000 claims description 9
- 238000004873 anchoring Methods 0.000 claims description 8
- 239000000853 adhesive Substances 0.000 claims description 6
- 239000011248 coating agent Substances 0.000 claims description 6
- 238000000576 coating method Methods 0.000 claims description 6
- 238000009412 basement excavation Methods 0.000 claims description 5
- 239000000463 material Substances 0.000 claims description 5
- 239000011241 protective layer Substances 0.000 claims description 5
- 238000007789 sealing Methods 0.000 claims description 4
- 238000005259 measurement Methods 0.000 claims description 3
- 238000005498 polishing Methods 0.000 claims description 3
- 239000004575 stone Substances 0.000 claims description 3
- 238000012360 testing method Methods 0.000 claims description 3
- 230000001502 supplementing effect Effects 0.000 claims description 2
- 238000005406 washing Methods 0.000 claims description 2
- 239000011435 rock Substances 0.000 abstract description 7
- 230000008901 benefit Effects 0.000 abstract description 5
- 230000000694 effects Effects 0.000 abstract description 5
- 238000002791 soaking Methods 0.000 abstract description 5
- 239000002689 soil Substances 0.000 abstract description 5
- 230000002349 favourable effect Effects 0.000 abstract description 2
- 239000011440 grout Substances 0.000 description 4
- 238000011049 filling Methods 0.000 description 3
- 238000009933 burial Methods 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 230000003014 reinforcing effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000009435 building construction Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000003673 groundwater Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000010422 painting Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D31/00—Protective arrangements for foundations or foundation structures; Ground foundation measures for protecting the soil or the subsoil water, e.g. preventing or counteracting oil pollution
- E02D31/10—Protective arrangements for foundations or foundation structures; Ground foundation measures for protecting the soil or the subsoil water, e.g. preventing or counteracting oil pollution against soil pressure or hydraulic pressure
- E02D31/12—Protective arrangements for foundations or foundation structures; Ground foundation measures for protecting the soil or the subsoil water, e.g. preventing or counteracting oil pollution against soil pressure or hydraulic pressure against upward hydraulic pressure
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D31/00—Protective arrangements for foundations or foundation structures; Ground foundation measures for protecting the soil or the subsoil water, e.g. preventing or counteracting oil pollution
- E02D31/02—Protective arrangements for foundations or foundation structures; Ground foundation measures for protecting the soil or the subsoil water, e.g. preventing or counteracting oil pollution against ground humidity or ground water
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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
- E02D5/74—Means for anchoring structural elements or bulkheads
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D2250/00—Production methods
- E02D2250/003—Injection of material
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D2300/00—Materials
- E02D2300/0004—Synthetics
- E02D2300/0018—Cement used as binder
- E02D2300/0023—Slurry
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- Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Hydrology & Water Resources (AREA)
- Piles And Underground Anchors (AREA)
Abstract
The invention discloses an anti-floating anchor post-construction process, which comprises the following steps: pouring a cushion layer in the foundation pit, drilling an anti-floating anchor rod hole, placing an anti-floating anchor rod in the anti-floating anchor rod hole, pouring the anti-floating anchor rod hole, performing anti-floating anchor rod hole waterproof engineering construction, bending the anti-floating anchor rod, binding anti-floating plate reinforcing steel bars, and enabling the anti-floating anchor rod reinforcing steel bars to be located in a space formed by binding the anti-floating plate reinforcing steel bars. The invention has the advantages that: the method is suitable for all soil bodies and rock masses; the method is suitable for residential basement garage foundations, commercial complex underground garages, underground shopping malls, basement equipment house foundations, subway tunnels, subway stations, underwater structures and underwater tunnels; the bottom is picked up before the anti-floating anchor rod construction, so that the slurry cleaning is reduced, the soaking and the damage of water and slurry brought by the anti-floating anchor rod construction to a foundation bearing layer are reduced, the construction period is shortened, and the concrete replacement amount is reduced by 50%; the concrete pouring and forming effects of the cushion layer are facilitated; is favorable for the forming of the anti-floating anchor rod reinforcing steel bar.
Description
Technical Field
The invention relates to the technical field of construction of foundations and foundations of building construction engineering, in particular to a construction technology of an anti-floating anchor rod.
Background
In recent years, urban construction is more crowded, and in order to better solve the problem of utilization of longitudinal space of a building and save floor space of the building, underground space of the building is more and more widely applied. Large underground structures such as underground large basements, large underground structures, large equipment foundations and the like with shallow underground water levels occur in underground engineering, and underground burial is deep. Because the underground structures have large building area and deeper foundation burial, the number of building layers is increased day by day. Under the condition of the historical highest underground water level, the self weight of the structure is not enough to resist the buoyancy of underground water, and the anti-floating problem of underground structures is increasingly prominent.
The anti-floating anchor rod is one of the anti-floating measures for underground structure in building engineering. In the anti-floating design, the underground structures are mostly in the form of anti-floating anchor rods or anti-floating piles (uplift piles). The upward displacement of the building on the pressure pile is resisted, and the pressure pile is opposite to the stress direction related to the height and the change of the underground water level. The rock mass anti-floating anchor rod has high uplift resistance, simple and convenient construction, high speed, economy, environmental protection and no space occupation, and has extremely high economic benefit and social benefit. The construction of traditional anti-floating anchor rod is before the bed course is pour, and anti-floating anchor rod is under construction earlier, then pours the bed course, and the anti-floating plate reinforcing bar of ligature again pours anti-floating plate, nevertheless if under the circumstances that groundwater is abundant or has rock stratum fracture water, the construction anti-floating anchor rod very easily causes disturbance, soaking to the foundation soil layer, can form the secondary simultaneously and pick up the end.
Disclosure of Invention
The invention aims to provide an anti-floating anchor post-construction process to solve the problems of disturbance, soaking and secondary bottom picking of a foundation soil layer.
In order to achieve the purpose, the anti-floating anchor rods are adopted for construction, the foundation pit is excavated and then the foundation bed is constructed to seal the substrate, when the strength of the bed reaches the designed strength, the anti-floating anchor rods are constructed, and then the anti-floating plate reinforcing steel bars are bound.
The specific technical scheme is as follows:
a post-construction process of an anti-floating anchor rod,
the method comprises the following steps:
(1) manually matching with a mechanical foundation to pick up the foundation to the foundation pit cushion foundation elevation;
(2) pouring a cushion layer;
(3) positioning and paying off are carried out according to the construction position of the design point diagram of the anti-floating anchor rod, and the position of the anti-floating anchor rod is marked;
(4) after drilling and hole cleaning are finished, an anti-floating anchor rod and a grouting pipe which are made of steel bars are put into an anti-floating anchor rod hole, the part of the anti-floating anchor rod, which is positioned in the anti-floating anchor rod hole, is an anchoring section, and the part, which is exposed out of the anti-floating anchor rod hole, is an exposed section;
(5) grouting into the anti-floating anchor rod hole;
(6) after grouting, performing waterproof construction;
(7) and after the strength of the anti-floating anchor rod hole meets the requirement, bending the exposed section of the anti-floating anchor rod to enable the exposed section of the anti-floating anchor rod to be located in a space formed by binding the anti-floating plate steel bars.
Further, the specific process of the step (1) is as follows: specifically, positioning and paying off a foundation and measuring the elevation of the foundation; the mechanical breaking and the foundation excavation form a foundation pit, the foundation is picked up by manually matching with a mechanical foundation, the foundation pit is directly constructed to the foundation elevation of the foundation pit cushion layer, the foundation pit is provided with a water collecting pit, and open water in the foundation pit is drained and collected to remove the foundation pit.
Further, the specific process of the step (2) is as follows: installing a foundation template, pouring a concrete cushion, and well performing elevation measurement and surface press polishing in the cushion pouring process to prepare for subsequent waterproof engineering construction.
Further, the specific process of the step (3) is as follows:
a. making a mechanical inlet and outlet route of the anti-floating anchor rod;
b. the strength of the cushion layer meets the design requirement, the anti-floating anchor rod is positioned and paid off according to the construction position of the anti-floating anchor rod design point diagram, the anti-floating anchor rod is positioned and marked at the position, and the anti-floating anchor rod is uniformly arranged in a planar mode and is uniformly arranged under the basement bottom plate;
c. then, the anti-floating anchor rod drilling machine enters the field for construction: and the anti-floating anchor rod drilling machine walks on the cushion layer and performs drilling construction of the anti-floating anchor rod according to the positioning position of the anti-floating anchor rod.
Furthermore, the grouting in the step (5) is implemented by adding M30 cement slurry mixed with the pea stones, and performing reverse grouting by using hole bottom pressure, wherein the full-hole grouting is completed at one time, and the grouting pressure is 1.0 MPa.
Further, the descending depth of the anti-floating anchor rod in the step (4) and the design error are not more than 10cm, the anti-floating anchor rod completed in the same day is required to complete grouting in the operation of the step (5), and a grouting pipe is reserved in the hole.
Further, in the step (5), when the slurry overflows from the orifice and the color and the water-cement ratio of the overflowed slurry and the poured slurry are basically consistent, feeding is stopped, the filling degree of the grouting is checked for 24 hours, and if shrinkage or settlement exists, the slurry is supplemented.
Further, quantitative grouting and hole forming conditions in the drilling process are adopted in the grouting process in the step (5) for control;
and (4) if grouting is stopped for more than 30 minutes in the grouting process, repeating the step (4) at the position close to the anti-floating anchor rod, and performing drilling, hole cleaning, anti-floating anchor rod and grouting pipe releasing and grouting again.
Further, the step (6) specifically comprises the following operations:
a. washing the slurry and the cement slurry on the surface of the cushion layer;
b. and (3) waterproof engineering construction: the grouting end socket of the anti-floating anchor rod is processed to be flat or recessed by 10mm, the head-out position of the anti-floating anchor rod is filled with factice for sealing, a cement-based permeable crystalline coating waterproof layer is coated, and a cushion layer self-adhesive waterproof coiled material is constructed; constructing a waterproof protective layer;
c. and (4) carrying out a drawing test after the anti-floating anchor rod reaches the design strength, and carrying out drilling, hole cleaning, grouting, anti-floating anchor rod foundation waterproof engineering and waterproof protection engineering construction on the unqualified anti-floating anchor rod at the adjacent position again.
Further, the specific operation of the step (7) is: bending the anti-floating anchor rod reinforcing steel bars by adopting a hydraulic machine; and then carrying out foundation construction: and (3) binding the reinforcing steel bars of the anti-floating plate, installing the template, and anchoring the anti-floating anchor steel bars to the anti-floating plate reinforcing steel bars after the anti-floating plate is poured, wherein the exposed sections of the anti-floating anchor steel bars are positioned in the space formed by binding the anti-floating plate reinforcing steel bars.
The invention has the following advantages:
the method is suitable for all soil bodies and rock masses; the method is suitable for residential basement garage foundations, commercial complex underground garages, underground shopping malls, basement equipment house foundations, subway tunnels, subway stations, underwater structures and underwater tunnels; the bottom is picked up before the anti-floating anchor rod construction, so that the slurry cleaning is reduced, the soaking and the damage of water and slurry brought by the anti-floating anchor rod construction to a foundation bearing layer are reduced, the construction period is shortened, and the concrete replacement amount is reduced by 50%; the concrete pouring and forming effects of the cushion layer are facilitated; is favorable for the forming of the anti-floating anchor rod reinforcing steel bar.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the principles of the invention:
FIG. 1 is a schematic diagram of a poured bedding construction;
FIG. 2 is a schematic structural diagram of the anti-floating anchor rod after cement slurry is poured;
FIG. 3 is a schematic structural diagram of the cement-based capillary crystalline coating after waterproof layer construction;
FIG. 4 is a schematic structural view of a cushion layer self-adhesive waterproof roll after construction;
FIG. 5 is a schematic structural view of the waterproof protective layer after construction;
FIG. 6 is an enlarged view of the structure of part A;
FIG. 7 is a field diagram of hole forming of an anti-floating anchor rod hole after the cushion layer is poured;
FIG. 8 is a field view after the construction of a waterproof project;
FIG. 9 is a field view after the construction of the waterproof protection project;
FIG. 10 is a field view after the construction of the waterproof protection project;
FIG. 11 is a construction site view of the anti-floating plate reinforcement bar binding;
fig. 12 is a field view after the anti-floating plate reinforcing steel bar binding construction.
The self-adhesive waterproof coating comprises a cushion layer 1, an anti-floating anchor rod 2, an anchoring section 21, an exposed section 22, cement paste 3, factice 4, a cement-based permeable crystalline coating waterproof layer 5, a cushion layer self-adhesive waterproof coiled material 6 and a waterproof protective layer 7.
Detailed Description
The present invention will be described in detail with reference to the drawings and specific embodiments, which are illustrative of the present invention and are not to be construed as limiting the present invention.
The construction process comprises the following steps: pouring a cushion layer 1 in a foundation pit, drilling an anti-floating anchor rod hole, placing an anti-floating anchor rod 2 in the anti-floating anchor rod hole, pouring the anti-floating anchor rod hole, constructing anti-floating anchor rod hole waterproof engineering, bending the anti-floating anchor rod 2, binding anti-floating plate reinforcing steel bars, and placing the anti-floating anchor rod 2 reinforcing steel bars in a space formed by binding the anti-floating plate reinforcing steel bars.
The detailed construction process is as follows:
first, basement excavation
(1) Measurement: specifically, positioning and paying off a foundation and measuring the elevation of the foundation;
(2) mechanically breaking and excavating a base to form a foundation pit, manually matching with a mechanical base to pick up the base, and directly constructing to the base elevation of the foundation pit cushion layer;
(3) the foundation pit is provided with a water collecting pit, and open water in the base is drained, collected and discharged out of the foundation pit;
second, cushion layer (replacement and filling) construction
(1) The foundation is a differentiated mud rock layer, the mud rock is blocky, disturbance exists in the excavation and bottom picking processes, and the excavation amount is larger than the basic budget amount; because the size and the thickness of the independent foundation are different, a foundation template needs to be installed, then a concrete cushion layer 1 is poured, elevation reading and measuring and surface press polishing are carried out in the pouring process of the cushion layer 1, and preparation is made for subsequent waterproof engineering construction;
thirdly, manufacturing and processing the anti-floating anchor rod 2
(1) A mechanical inlet and outlet route of the anti-floating anchor rod 2 is made;
(2) the strength of the cushion layer 1 meets the design requirement, the anti-floating anchor rod 2 is positioned and set off according to the construction position of the design point diagram of the anti-floating anchor rod 2, the position of the anti-floating anchor rod 2 is positioned and marked, the anti-floating anchor rod is uniformly arranged in a planar manner and is uniformly arranged under the bottom plate of the basement,
(3) then, the anti-floating anchor rod drilling machine enters the field for construction: the anti-floating anchor rod drilling machine walks on the cushion layer 1, carries out anti-floating anchor rod hole drilling construction according to the positioning position of the anti-floating anchor rod 2, reduces disturbance to the basement mudstone,
(4) after drilling and hole cleaning are finished, an anti-floating anchor rod 2 and a grouting pipe which are manufactured by using steel bars are put into an anti-floating anchor rod hole and are put to a designed depth, the error is not more than 10cm, the part of the anti-floating anchor rod 2 in the anti-floating anchor rod hole is an anchoring section 21, and the part exposed out of the anti-floating anchor rod hole is an exposed section 22;
(5) grouting, namely grouting the anti-floating anchor rod 2 completed in the same day, performing reverse grouting by adopting hole bottom pressure, and completing full-hole grouting at one time, wherein the grouting pressure is 1.0 MPa.
Mixing the M30 cement paste 3 with a stirrer, adding pea stone into the M30 cement paste 3 for mixing, filling the anti-floating anchor rod hole, increasing the friction force of the anti-floating anchor rod 2, pressing and injecting the mixed cement paste 3 into the anti-floating anchor rod hole through a grouting machine, and keeping the grouting pipe in the hole. And when the grout overflows from the orifice and the color and the water cement ratio of the overflowed grout 3 and the poured grout 3 are basically consistent, stopping feeding, checking the grouting fullness within 24 hours, and if shrinkage or settlement exists, supplementing the grout. In order to ensure the grouting length of the anchoring section and avoid over-grouting or under-grouting, quantitative grouting is adopted in the grouting process to be combined with the hole forming condition in the drilling process for control. Before the slurry is not completely cured, the anti-floating anchor 2 must not be pulled and moved. In the grouting process, stopping grouting for more than 30 minutes in the midway, and if stopping grouting for more than 30 minutes, drilling, cleaning holes, placing the anti-floating anchor rod and a grouting pipe and grouting again at the position close to the anti-floating anchor rod 2;
fourth, anti-floating anchor rod foundation waterproof engineering and waterproof protection engineering construction
(1) The surface mud and the cement slurry 3 of the cushion layer 1 are washed clean;
(2) and (3) waterproof engineering construction: grouting and sealing heads of the anti-floating anchor rods 2 to be flat or concave (10mm), pouring factice 4 into the head positions of the anti-floating anchor rods 2 for sealing, painting cement-based permeable crystalline coating waterproof layers 5, and constructing self-adhesive waterproof coiled materials 6 of cushion layers;
(3) constructing a waterproof protective layer 7;
(4) and (3) carrying out a drawing test after the anti-floating anchor rod 2 reaches the design strength, and carrying out drilling, hole cleaning, anti-floating anchor rod and grouting pipe placing, grouting, anti-floating anchor rod foundation waterproof engineering and waterproof protection engineering construction on the unqualified anti-floating anchor rod 2 at the adjacent position again.
Fifthly, bending treatment of 2 reinforcing steel bars of anti-floating anchor rod
(1) Bending the exposed section of the reinforcing steel bar of the anti-floating anchor rod 2 by adopting a hydraulic machine;
(2) foundation construction: and (3) binding the reinforcing steel bars of the anti-floating plate, installing the template, and anchoring the 2 reinforcing steel bars of the anti-floating anchor rod to the anti-floating plate after the anti-floating plate is poured, wherein the exposed part of the 2 reinforcing steel bars of the anti-floating anchor rod is positioned in a space formed by binding the reinforcing steel bars of the anti-floating plate.
The process of the invention has the advantages that:
1. the method is suitable for all soil bodies and rock masses; the method is suitable for residential basement garage foundations, commercial complex underground garages, underground shopping malls, basement equipment house foundations, subway tunnels, subway stations, underwater structures and underwater tunnels;
2. the foundation bottom picking mode is generally that manual work is mainly used as auxiliary machinery, the foundation bottom picking is carried out before the anti-floating anchor rod construction, the operation is simple, the speed is high, and the mechanical labor cost is reduced by 50%;
3. the bottom picking before the anti-floating anchor rod construction reduces the cleaning of slurry, reduces the soaking and damage of water and slurry to a foundation bearing layer caused by the anti-floating anchor rod construction, reduces the secondary bottom picking, saves the construction period and reduces the concrete replacement amount by 50 percent;
4. the post-construction of the anti-floating anchor rod is beneficial to the concrete pouring and forming effects of the cushion layer;
5. after the cushion layer construction is finished, the anti-floating anchor rod construction is carried out, so that organized cleaning of anti-floating anchor rod construction slurry is facilitated, and the difficulty in site cleaning is greatly reduced;
6. after the cushion layer construction is finished, the anti-floating anchor rod construction is carried out, the hole forming effect of the anti-floating anchor rod is good, and the back flow of slurry backflow is reduced;
7. after the cushion layer construction is finished, the anti-floating anchor rod construction is carried out, the anti-floating anchor rod reinforcing steel bar forming effect is good, and the damage of mechanical construction to the anti-floating anchor rod reinforcing steel bar is reduced;
8. pouring a cushion layer, wherein the grouting end socket of the anti-floating anchor rod is processed to be flat or concave (10mm), the waterproof treatment of the base coiled material in the range of the anti-floating anchor rod is relatively flat, and the waterproof is easy to be fixed by being turned over on the surface of the steel bar;
9. the anti-floating anchor rod steel bar anchor goes into the curved anchor shaping of foundation inner steel bar effectual, reduces the artifical 30% of reinforcing bar restoration.
The technical solutions provided by the embodiments of the present invention are described in detail above, and the principles and embodiments of the present invention are explained herein by using specific examples, and the descriptions of the embodiments are only used to help understanding the principles of the embodiments of the present invention; meanwhile, for a person skilled in the art, according to the embodiments of the present invention, there may be variations in the specific implementation manners and application ranges, and in summary, the content of the present description should not be construed as a limitation to the present invention.
Claims (10)
1. The post-construction process of the anti-floating anchor rod is characterized by comprising the following steps:
the method comprises the following steps:
(1) manually matching with a mechanical foundation to pick up the foundation to the foundation pit cushion foundation elevation;
(2) pouring a cushion layer;
(3) positioning and paying off are carried out according to the construction position of the design point diagram of the anti-floating anchor rod, and the position of the anti-floating anchor rod is marked;
(4) after drilling and hole cleaning are finished, an anti-floating anchor rod and a grouting pipe which are made of steel bars are put into an anti-floating anchor rod hole, the part of the anti-floating anchor rod, which is positioned in the anti-floating anchor rod hole, is an anchoring section, and the part, which is exposed out of the anti-floating anchor rod hole, is an exposed section;
(5) grouting into the anti-floating anchor rod hole;
(6) after grouting, performing waterproof construction;
(7) and after the strength of the anti-floating anchor rod hole meets the requirement, bending the exposed section of the anti-floating anchor rod to enable the exposed section of the anti-floating anchor rod to be located in a space formed by binding the anti-floating plate steel bars.
2. The post-construction process of the anti-floating anchor rod according to claim 1, characterized in that:
the specific process of the step (1) is as follows: specifically, positioning and paying off a foundation and measuring the elevation of the foundation; the mechanical breaking and the foundation excavation form a foundation pit, the foundation is picked up by manually matching with a mechanical foundation, the foundation pit is directly constructed to the foundation elevation of the foundation pit cushion layer, the foundation pit is provided with a water collecting pit, and open water in the foundation pit is drained and collected to remove the foundation pit.
3. The post-construction process of the anti-floating anchor rod according to claim 1, characterized in that:
the specific process of the step (2) is as follows: installing a foundation template, pouring a concrete cushion, and well performing elevation measurement and surface press polishing in the cushion pouring process to prepare for subsequent waterproof engineering construction.
4. The post-construction process of the anti-floating anchor rod according to claim 1, characterized in that:
the specific process of the step (3) is as follows:
a. making a mechanical inlet and outlet route of the anti-floating anchor rod;
b. the strength of the cushion layer meets the design requirement, the anti-floating anchor rod is positioned and paid off according to the construction position of the anti-floating anchor rod design point diagram, the anti-floating anchor rod is positioned and marked at the position, and the anti-floating anchor rod is uniformly arranged in a planar mode and is uniformly arranged under the basement bottom plate;
c. then, the anti-floating anchor rod drilling machine enters the field for construction: and the anti-floating anchor rod drilling machine walks on the cushion layer and performs drilling construction of the anti-floating anchor rod according to the positioning position of the anti-floating anchor rod.
5. The post-construction process of the anti-floating anchor rod according to claim 1, characterized in that:
and (5) grouting in the step (5) is performed by adding M30 cement slurry mixed with the pea stones, and performing reverse grouting by adopting the bottom pressure of the hole, wherein the full-hole grouting is completed at one time, and the grouting pressure is 1.0 MPa.
6. The post-construction process of the anti-floating anchor rod according to claim 1, characterized in that:
and (3) the lowering depth of the anti-floating anchor rod in the step (4) is not more than 10cm from the design error, the anti-floating anchor rod completed in the same day is required to complete grouting in the operation of the step (5), and a grouting pipe is reserved in the hole.
7. The post-construction process of the anti-floating anchor rod according to claim 1, characterized in that:
and (5) stopping feeding when the slurry overflows from the orifice and the color and the water-cement ratio of the overflowed slurry and the poured slurry are basically consistent, checking the fullness degree of grouting for 24 hours, and supplementing slurry if shrinkage or settlement exists.
8. The post-construction process of the anti-floating anchor rod according to claim 1, characterized in that:
in the grouting process of the step (5), quantitative grouting is adopted to be combined with the hole forming condition in the drilling process for control;
and (4) if grouting is stopped for more than 30 minutes in the grouting process, repeating the step (4) at the position close to the anti-floating anchor rod, and performing drilling, hole cleaning, anti-floating anchor rod and grouting pipe releasing and grouting again.
9. The post-construction process of the anti-floating anchor rod according to claim 1, characterized in that:
the step (6) comprises the following specific operations:
a. washing the slurry and the cement slurry on the surface of the cushion layer;
b. and (3) waterproof engineering construction: the grouting end socket of the anti-floating anchor rod is processed to be flat or recessed by 10mm, the head-out position of the anti-floating anchor rod is filled with factice for sealing, a cement-based permeable crystalline coating waterproof layer is coated, and a cushion layer self-adhesive waterproof coiled material is constructed; constructing a waterproof protective layer;
c. and (4) carrying out a drawing test after the anti-floating anchor rod reaches the design strength, and carrying out drilling, hole cleaning, grouting, anti-floating anchor rod foundation waterproof engineering and waterproof protection engineering construction on the unqualified anti-floating anchor rod at the adjacent position again.
10. The post-construction process of the anti-floating anchor rod according to claim 1, characterized in that:
the specific operation of the step (7) is as follows: bending the anti-floating anchor rod reinforcing steel bars by adopting a hydraulic machine; and then carrying out foundation construction: and (3) binding the reinforcing steel bars of the anti-floating plate, installing the template, and anchoring the anti-floating anchor steel bars to the anti-floating plate reinforcing steel bars after the anti-floating plate is poured, wherein the exposed sections of the anti-floating anchor steel bars are positioned in the space formed by binding the anti-floating plate reinforcing steel bars.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010494527.XA CN111622272A (en) | 2020-06-03 | 2020-06-03 | Post-construction process of anti-floating anchor rod |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112252376A (en) * | 2020-10-14 | 2021-01-22 | 中积兴业建设集团有限公司 | Self-locking anti-floating anchor rod construction method in complex geological environment |
| CN113529765A (en) * | 2021-07-16 | 2021-10-22 | 中国建筑第二工程局有限公司 | Rapid precipitation construction method of anti-floating anchor rod |
| CN114892657A (en) * | 2022-05-18 | 2022-08-12 | 中建二局第四建筑工程有限公司 | Construction method of foundation slab with anti-floating anchor rod |
| CN115126015A (en) * | 2022-06-23 | 2022-09-30 | 河南省诚建检验检测技术股份有限公司 | Construction method of underground garage foundation anti-floating reinforcement comprehensive treatment system |
| CN115142482A (en) * | 2022-07-04 | 2022-10-04 | 中国十九冶集团有限公司 | Later-stage anti-floating reinforcement treatment method for basement |
| CN115163149A (en) * | 2022-06-22 | 2022-10-11 | 保利长大工程有限公司 | Anti-floating anchor rod construction process based on tunnel engineering |
| CN115182339A (en) * | 2022-08-19 | 2022-10-14 | 中国建筑第八工程局有限公司 | Construction method for anti-floating anchor rod by grouting first and then bending |
| CN116815830A (en) * | 2023-07-12 | 2023-09-29 | 安阳市高新建筑有限责任公司 | Underground engineering foundation anti-floating method and system based on two-way force system construction |
| CN116905483A (en) * | 2023-06-25 | 2023-10-20 | 中建八局第二建设有限公司 | Construction method for increasing anti-floating anchors behind basement bottom plate |
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Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112252376A (en) * | 2020-10-14 | 2021-01-22 | 中积兴业建设集团有限公司 | Self-locking anti-floating anchor rod construction method in complex geological environment |
| CN113529765A (en) * | 2021-07-16 | 2021-10-22 | 中国建筑第二工程局有限公司 | Rapid precipitation construction method of anti-floating anchor rod |
| CN113529765B (en) * | 2021-07-16 | 2024-04-26 | 中国建筑第二工程局有限公司 | Rapid water-lowering construction method for anti-floating anchor rod |
| CN114892657A (en) * | 2022-05-18 | 2022-08-12 | 中建二局第四建筑工程有限公司 | Construction method of foundation slab with anti-floating anchor rod |
| CN115163149A (en) * | 2022-06-22 | 2022-10-11 | 保利长大工程有限公司 | Anti-floating anchor rod construction process based on tunnel engineering |
| CN115163149B (en) * | 2022-06-22 | 2023-04-21 | 保利长大工程有限公司 | Anti-floating anchor construction process based on tunnel engineering |
| CN115126015A (en) * | 2022-06-23 | 2022-09-30 | 河南省诚建检验检测技术股份有限公司 | Construction method of underground garage foundation anti-floating reinforcement comprehensive treatment system |
| CN115126015B (en) * | 2022-06-23 | 2024-06-04 | 河南省诚建检验检测技术股份有限公司 | Construction method of anti-floating reinforcement comprehensive treatment system for underground garage foundation |
| CN115142482B (en) * | 2022-07-04 | 2024-02-13 | 中国十九冶集团有限公司 | Later-stage anti-floating reinforcement treatment method for basement |
| CN115142482A (en) * | 2022-07-04 | 2022-10-04 | 中国十九冶集团有限公司 | Later-stage anti-floating reinforcement treatment method for basement |
| CN115182339A (en) * | 2022-08-19 | 2022-10-14 | 中国建筑第八工程局有限公司 | Construction method for anti-floating anchor rod by grouting first and then bending |
| CN116905483A (en) * | 2023-06-25 | 2023-10-20 | 中建八局第二建设有限公司 | Construction method for increasing anti-floating anchors behind basement bottom plate |
| CN116815830B (en) * | 2023-07-12 | 2024-03-08 | 安阳市高新建筑有限责任公司 | Underground engineering foundation anti-floating method and system based on two-way force system construction |
| CN116815830A (en) * | 2023-07-12 | 2023-09-29 | 安阳市高新建筑有限责任公司 | Underground engineering foundation anti-floating method and system based on two-way force system construction |
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