CN105350584A - Construction method of anti-floating anchor rod - Google Patents
Construction method of anti-floating anchor rod Download PDFInfo
- Publication number
- CN105350584A CN105350584A CN201510759125.7A CN201510759125A CN105350584A CN 105350584 A CN105350584 A CN 105350584A CN 201510759125 A CN201510759125 A CN 201510759125A CN 105350584 A CN105350584 A CN 105350584A
- Authority
- CN
- China
- Prior art keywords
- anchor rod
- bolthole
- red sandstone
- grouting
- float anchor
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Classifications
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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
-
- 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
-
- 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
- E02D5/80—Ground anchors
- E02D5/808—Ground anchors anchored by using exclusively a bonding material
-
- 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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- 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)
- Environmental & Geological Engineering (AREA)
- Hydrology & Water Resources (AREA)
- Foundations (AREA)
- Piles And Underground Anchors (AREA)
Abstract
The invention belongs to the field of anti-floating anchor rod construction in the building industry and particularly relates to a construction method of an anti-floating anchor rod. The method includes the steps that after a cushion layer is constructed, concrete, at the pile position of the anti-floating anchor rod, of the cushion layer is cut off through a water drill; a cofferdam is piled up on the periphery of an anchor rod hole in the cushion layer through red sandstone, and the red sandstone is then used for laying a channel used for connecting the cofferdam with the interior of a nearest post cap pit; the anchor rod hole is drilled in a red sandstone natural foundation through an anchor rod rotary-jetting drilling rig; prestressed concrete is adopted, a twisted steel bar is used as a rod body of the anti-floating anchor rod, and the two ends of the twisted steel bar are connected through square steel cushion plates and prestressed nuts; a grouting pipe is placed in the anchor rod hole together with the rod body of the anti-floating anchor rod; a two-time grouting method is adopted for grouting; an opening of the anchor rod hole is blocked through modified asphalt grease, and a waterproof layer is constructed above the opening; and the upper end of the rod body of the anti-floating anchor rod is anchored in a foundation mat. The construction method solves the problems existing in structure anti-floating construction in red sandstone geology with the high underground water level.
Description
Technical field
The invention belongs to anti-float anchor rod construction field in building trade, be specifically related to a kind ofly adopt indented bars for prestressed concrete as the anchor connection construction technology of anti-float anchor rod and sole plate.
Background technology
In recent years, Super High synthesis is increasing, and the exploitation of podium and basement are more and more extensive, and according to different geological conditionss, partial high-level, Super High can adopt direct foundation according to designing requirement, and podium adopts the form of anti-float anchor rod.In western part along areas such as the Yellow River, it is weathered sandstone that underground exists a large amount of 3rd, is also called Red Sandstone, and its density is comparatively large, and structure belongs to densifie state, and inactive state intensity is large, has good bearing capacity of foundation soil.In Red Sandstone, water content is larger, and one meets water softening, and easy disintegrating, sharply reduces by intensity after disturbance.How well utilizing Red Sandstone direct foundation and adopt anti-float anchor rod, affect minimum on basis and waterproof, reaching designing requirement, is a great problem simultaneously.
Summary of the invention
Under present invention is directed at red sandstone geology, the anchor connection of anti-float anchor rod and sole plate is constructed and is provided a kind of new way: i.e. a kind of construction method of anti-float anchor rod.
A construction method for anti-float anchor rod, is characterized in that comprising the following steps:
After S1, bed course of having constructed on Red Sandstone direct foundation, water drilling is adopted to be cut by the blinding concrete at anti-float roof bolt stump position place;
On S2, bed course water drilling cut after bolthole surrounding Red Sandstone pile up a cofferdam, then lay a conduit by Red Sandstone, for connecting cofferdam in nearest cap hole;
The Red Sandstone direct foundation of S3, employing anchor pole jet drill rig blinding concrete cutting section in step sl gets out bolthole;
S4, adopt indented bars for prestressed concrete as the anti-float anchor rod body of rod, two termination is all connected with prestressing nut with square steel backing plate;
S5, Grouting Pipe is put into bolthole with the pre-anti-float anchor rod body of rod;
S6, the slip casting of employing secondary injection slurry processes; After slip casting completes, carry out the inspection of uplift resistance acceptance test according to specification;
S7, bolthole opening part adopt modified bitumen ointment to carry out shutoff, then carry out the construction of waterproofing course above it;
S8, anti-float anchor rod body of rod upper end anchor are in sole plate, and end is that square steel backing plate Prestressing nut connects anchoring, simultaneously additional spiral stirrup and hang muscle and be connected with the baseplate reinforcing bar of sole plate.
The concrete steps of secondary injection slurry processes slip casting are adopted to be in described step S5: 1. common pressure grouting adopts at the bottom of hole and returns slurry processes first time, Grouting Pipe is inserted 100mm place at the bottom of distance bolthole, injected at the bottom of bolthole by Grouting Pipe by cement paste with grouting pump, cement paste is outwards full of successively from mouth at the bottom of bolthole and is extruded by the water and air in bolthole; 2. after first time slip casting completes, Twice High Pressure Splitting Grouting is carried out again in 24 to 48 hours.
In described step S8 anti-float anchor rod body of rod upper end square steel backing plate under spiral stirrup is installed, and arrange and two-wayly hang muscle, hang muscle through spiral stirrup together with the base plate steel bar binding of sole plate.
To hole in described step S3 and step S6 and cement in slip casting process gives up to starch and flows into during cap cheats along the conduit laid by Red Sandstone, extract out with slush pump.
The present invention has following beneficial effect:
1, the present invention solves the problem of structural anti-buoyancy construction problem, anti-float anchor rod and sole plate anchor connection problem and anti-float anchor rod place Slab Waterproof Construction in the red sandstone geology that groundwater table enriches simultaneously;
2, the present invention adopts indented bars for prestressed concrete as the anti-float anchor rod body of rod, and use the easy construction of this kind of anti-float anchor rod body of rod, anchoring is safe and reliable;
3, construction method of the present invention farthest avoids the disturbance to ground, reduces the impact on bearing capacity of foundation soil;
4, the anchoring way at anti-float anchor rod two ends in the present invention, can shorten the anchorage length of indented bars for prestressed concrete, reduces steel using amount, contributes to energy-saving and emission-reduction;
5, construction method of the present invention simplifies working procedure, ensure that construction quality, shortens the construction period.
Accompanying drawing explanation
Fig. 1 be in the present invention anti-float anchor rod constructed after integrated connection elevational schematic view.
Fig. 2 is the useless slurry in bolthole place flow guiding structure floor map in the present invention.
Fig. 3 is the useless slurry in bolthole place flow guiding structure generalized section in the present invention.
Fig. 4 is anti-float anchor rod upper end and sole plate anchor connection floor map in the present invention.
In figure: 1-indented bars for prestressed concrete; 2-square steel backing plate; 3-prestressing nut; 4-spiral stirrup; 5-baseplate reinforcing bar; 6-hangs muscle; 7-Grouting Pipe; 8-modified bitumen ointment; 9-bed course; 10-waterproofing course; 11-bolthole; 12-Red Sandstone direct foundation; 13-conduit; 14-cap is cheated; 15-sole plate; 16-cofferdam.
Detailed description of the invention
For a better understanding of the present invention, below in conjunction with specific embodiments and the drawings, technical scheme of the present invention is further illustrated (as shown in Figure 1,2,3, 4).
A construction method for anti-float anchor rod, is characterized in that comprising the following steps:
After S1, bed course 9 of having constructed on Red Sandstone direct foundation 12, water drilling is adopted to be cut by the blinding concrete at anti-float roof bolt stump position place (ensureing bolthole eleven-punch and aperture);
On S2, bed course 9 water drilling cut after bolthole 11 surrounding Red Sandstone pile up a cofferdam 16, then lay a conduit 13 by Red Sandstone, for connecting in cofferdam 16 to nearest cap hole 14 (as Suo Shi Fig. 2, Fig. 3);
The Red Sandstone direct foundation 12 of S3, employing anchor pole jet drill rig blinding concrete cutting section in step sl gets out bolthole 11(and namely on the Red Sandstone direct foundation 12 at anti-float roof bolt stump position place, gets out bolthole 11, bolthole 11 degree of depth, aperture reach designing requirement; In boring procedure, the useless slurry of cement flows in cap hole 14 along conduit 13, extracts out with slush pump);
S4, adopt indented bars 1 for prestressed concrete as the anti-float anchor rod body of rod, two termination is all connected with prestressing nut 3 with square steel backing plate 2 that (square steel backing plate 2 is enclosed within indented bars 1 for prestressed concrete, again prestressing nut 3 is screwed in indented bars 1 for prestressed concrete to break end position, finally square steel backing plate 2 is welded with prestressing nut 3; One end is stretched in bolthole 11, and the other end anchors in sole plate 15);
S5, Grouting Pipe 7 is put into bolthole 11 with the pre-anti-float anchor rod body of rod;
S6, the slip casting of employing secondary injection slurry processes; After slip casting completes, carry out the inspection of uplift resistance acceptance test according to specification;
S7, bolthole 11 opening part (i.e. blinding concrete cutting section in step S1) adopt modified bitumen ointment 8 to carry out shutoff, then carry out the construction (namely waterproofing course 10 is laid on bed course 9) of waterproofing course 10 above it;
S8, anti-float anchor rod body of rod upper end anchor are in sole plate 15, end is that square steel backing plate 2 Prestressing nut 3 connects anchoring, simultaneously additional spiral stirrup 4 and hang muscle 6 and connect with the baseplate reinforcing bar 5 of sole plate 15 (by spiral stirrup together with hanging muscle and being anchored at sole plate 15).
The concrete steps of secondary injection slurry processes slip casting are adopted to be in described step S5: 1. common pressure grouting adopts at the bottom of hole and returns slurry processes first time, Grouting Pipe 7 is inserted apart from bolthole 11 end 100mm place, with grouting pump, cement paste is injected bolthole 11 end by Grouting Pipe 7, cement paste is outwards full of successively from bolthole 11 end mouth and is extruded by the water and air in bolthole 11; 2. after first time slip casting completes, carry out Twice High Pressure Splitting Grouting (control well time of fracture grouting and pressure) in 24 to 48 hours again.
In described step S8, spiral stirrups 4 installed by the square steel backing plate 2 times of anti-float anchor rod body of rod upper end, and arrange and two-wayly hang muscle 6, hang muscle 6 through spiral stirrup 4 together with baseplate reinforcing bar 5 colligation of sole plate 15 (as shown in Figure 4).
To hole in described step S3 and step S6 and cement in slip casting process gives up to starch and flows into cap along the conduit 13 laid by Red Sandstone and cheat in 14, extract out with slush pump.
Above embodiment is only the preferred version of the present invention; but not limitation of the present invention; person skilled in the relevant technique; without departing from the spirit and scope of the present invention; various conversion or modification can also be made; therefore all equivalent technical schemes, all fall into protection scope of the present invention.
Claims (3)
1. a construction method for anti-float anchor rod, is characterized in that comprising the following steps:
After S1, bed course (9) of having constructed on Red Sandstone direct foundation (12), water drilling is adopted to be cut by the blinding concrete at anti-float roof bolt stump position place;
Bolthole (11) surrounding Red Sandstone after the upper water drilling of S2, bed course (9) cuts piles up a cofferdam (16), then lays a conduit (13) by Red Sandstone, for connecting cofferdam (16) in nearest cap hole (14);
The Red Sandstone direct foundation (12) of S3, employing anchor pole jet drill rig blinding concrete cutting section in step sl gets out bolthole (11);
S4, adopt indented bars for prestressed concrete (1) as the anti-float anchor rod body of rod, two termination is all connected with prestressing nut (3) with square steel backing plate (2);
S5, Grouting Pipe (7) is put into bolthole (11) with the pre-anti-float anchor rod body of rod;
S6, the slip casting of employing secondary injection slurry processes; After slip casting completes, carry out the inspection of uplift resistance acceptance test according to specification;
S7, bolthole (11) opening part adopt modified bitumen ointment (8) to carry out shutoff, then carry out the construction of waterproofing course (10) above it;
S8, anti-float anchor rod body of rod upper end anchor are in sole plate (15), and end is that square steel backing plate (2) Prestressing nut (3) connects anchoring, simultaneously additional spiral stirrup (4) and hang muscle (6) and be connected with the baseplate reinforcing bar (5) of sole plate (15).
2. the construction method of a kind of anti-float anchor rod according to claim 1, it is characterized in that: in described step S5, adopt the concrete steps of secondary injection slurry processes slip casting to be: 1. common pressure grouting adopts at the bottom of hole and returns slurry processes first time, Grouting Pipe (7) is inserted apart from bolthole (11) end 100mm place, with grouting pump, cement paste is injected bolthole (11) end by Grouting Pipe (7), cement paste is outwards full of successively from bolthole (11) end mouth and is extruded by the water and air in bolthole (11); 2. after first time slip casting completes, Twice High Pressure Splitting Grouting is carried out again in 24 to 48 hours.
3. the construction method of a kind of anti-float anchor rod according to claim 1, it is characterized in that: in described step S8 anti-float anchor rod body of rod upper end square steel backing plate (2) under spiral stirrup (4) is installed, and arrange and two-wayly hang muscle (6), hang muscle (6) through spiral stirrup (4) together with baseplate reinforcing bar (5) colligation of sole plate (15).
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510759125.7A CN105350584B (en) | 2015-11-10 | 2015-11-10 | A kind of construction method of anti-float anchor rod |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510759125.7A CN105350584B (en) | 2015-11-10 | 2015-11-10 | A kind of construction method of anti-float anchor rod |
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| CN105350584A true CN105350584A (en) | 2016-02-24 |
| CN105350584B CN105350584B (en) | 2017-10-17 |
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Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106193615A (en) * | 2016-08-30 | 2016-12-07 | 安徽建工集团有限公司 | A kind of glass fiber-reinforced polymer prestressed anti-floating anchor rod charger and construction method thereof |
| CN108560613A (en) * | 2018-05-28 | 2018-09-21 | 青岛理工大学 | Integrated anti-floating method for open prestressed high-strength concrete pipe pile and anti-floating anchor rod |
| CN108677945A (en) * | 2018-05-28 | 2018-10-19 | 青岛理工大学 | Integrated anti-floating device of open prestressed high-strength concrete pipe pile and anti-floating anchor rod |
| CN109469010A (en) * | 2018-11-21 | 2019-03-15 | 中国电建集团成都勘测设计研究院有限公司 | Flow turbulence area prestressed anchor Cable Structure |
| CN109518689A (en) * | 2019-01-09 | 2019-03-26 | 甘肃第六建设集团股份有限公司 | Sandstone layer is long to expand the high-strength single reinforcement anti-float anchor rod construction method of body |
| CN110359451A (en) * | 2019-06-27 | 2019-10-22 | 中国五冶集团有限公司 | A kind of anti-float anchor rod water-impervious construction method |
| CN110939161A (en) * | 2018-09-21 | 2020-03-31 | 中冶集团武汉勘察研究院有限公司 | Construction method of large-diameter socketed anti-floating anchor rod and drilling tool used in method |
| CN111074953A (en) * | 2020-01-16 | 2020-04-28 | 沈阳促晋科技有限公司 | Underground building anti-floating control device |
| CN111501855A (en) * | 2020-04-27 | 2020-08-07 | 中国一冶集团有限公司 | Ground anchor anti-floating structure and construction method thereof |
| CN113186988A (en) * | 2021-03-09 | 2021-07-30 | 武大巨成结构股份有限公司 | Construction method of reaming self-locking type prestress anti-floating anchor rod |
| CN113482063A (en) * | 2021-06-29 | 2021-10-08 | 武大巨成结构股份有限公司 | Anti-floating construction method for newly-built basement |
| CN114482141A (en) * | 2022-02-14 | 2022-05-13 | 青岛理工大学 | Construction method of large-diameter finish-rolled deformed steel bar anti-floating anchor rod |
| CN114482142A (en) * | 2022-02-14 | 2022-05-13 | 青岛理工大学 | Major diameter finish rolling screw-thread steel anti-floating anchor rod |
| CN115059069A (en) * | 2022-08-18 | 2022-09-16 | 中建八局发展建设有限公司 | Prestress loading type bag type expanded anchor rod for building anti-floating and construction method |
| CN115404859A (en) * | 2022-08-12 | 2022-11-29 | 中建八局第一建设有限公司 | Novel pressure type prestress anti-floating anchor rod and construction method thereof |
| GB2620017A (en) * | 2022-05-12 | 2023-12-27 | Univ Qingdao Technology | Preload application device and method for large-diameter pretensioned glass fiber reinforced polymer anti-floating anchor |
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| CN202559345U (en) * | 2012-02-23 | 2012-11-28 | 山东同圆设计集团有限公司 | Bottom-expanded pre-stress anti-floating anchor rod |
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Cited By (21)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106193615A (en) * | 2016-08-30 | 2016-12-07 | 安徽建工集团有限公司 | A kind of glass fiber-reinforced polymer prestressed anti-floating anchor rod charger and construction method thereof |
| CN108560613B (en) * | 2018-05-28 | 2020-05-12 | 青岛理工大学 | Integrated anti-floating method for open prestressed high-strength concrete pipe pile and anti-floating anchor rod |
| CN108560613A (en) * | 2018-05-28 | 2018-09-21 | 青岛理工大学 | Integrated anti-floating method for open prestressed high-strength concrete pipe pile and anti-floating anchor rod |
| CN108677945A (en) * | 2018-05-28 | 2018-10-19 | 青岛理工大学 | Integrated anti-floating device of open prestressed high-strength concrete pipe pile and anti-floating anchor rod |
| CN110939161A (en) * | 2018-09-21 | 2020-03-31 | 中冶集团武汉勘察研究院有限公司 | Construction method of large-diameter socketed anti-floating anchor rod and drilling tool used in method |
| CN110939161B (en) * | 2018-09-21 | 2021-06-25 | 中冶集团武汉勘察研究院有限公司 | Construction method of large-diameter socketed anti-floating anchor rod and drilling tool used in method |
| CN109469010A (en) * | 2018-11-21 | 2019-03-15 | 中国电建集团成都勘测设计研究院有限公司 | Flow turbulence area prestressed anchor Cable Structure |
| CN109518689A (en) * | 2019-01-09 | 2019-03-26 | 甘肃第六建设集团股份有限公司 | Sandstone layer is long to expand the high-strength single reinforcement anti-float anchor rod construction method of body |
| CN110359451A (en) * | 2019-06-27 | 2019-10-22 | 中国五冶集团有限公司 | A kind of anti-float anchor rod water-impervious construction method |
| CN111074953A (en) * | 2020-01-16 | 2020-04-28 | 沈阳促晋科技有限公司 | Underground building anti-floating control device |
| CN111501855A (en) * | 2020-04-27 | 2020-08-07 | 中国一冶集团有限公司 | Ground anchor anti-floating structure and construction method thereof |
| CN113186988A (en) * | 2021-03-09 | 2021-07-30 | 武大巨成结构股份有限公司 | Construction method of reaming self-locking type prestress anti-floating anchor rod |
| CN113482063A (en) * | 2021-06-29 | 2021-10-08 | 武大巨成结构股份有限公司 | Anti-floating construction method for newly-built basement |
| CN113482063B (en) * | 2021-06-29 | 2022-09-02 | 武大巨成结构股份有限公司 | Anti-floating construction method for newly-built basement |
| CN114482141A (en) * | 2022-02-14 | 2022-05-13 | 青岛理工大学 | Construction method of large-diameter finish-rolled deformed steel bar anti-floating anchor rod |
| CN114482142A (en) * | 2022-02-14 | 2022-05-13 | 青岛理工大学 | Major diameter finish rolling screw-thread steel anti-floating anchor rod |
| GB2620017A (en) * | 2022-05-12 | 2023-12-27 | Univ Qingdao Technology | Preload application device and method for large-diameter pretensioned glass fiber reinforced polymer anti-floating anchor |
| GB2620017B (en) * | 2022-05-12 | 2024-09-25 | Univ Qingdao Technology | Preload application device and method for large-diameter pretensioned glass fiber reinforced polymer anti-floating anchor |
| CN115404859A (en) * | 2022-08-12 | 2022-11-29 | 中建八局第一建设有限公司 | Novel pressure type prestress anti-floating anchor rod and construction method thereof |
| CN115404859B (en) * | 2022-08-12 | 2023-07-11 | 中建八局第一建设有限公司 | Novel pressure type prestress anti-floating anchor rod and construction method thereof |
| CN115059069A (en) * | 2022-08-18 | 2022-09-16 | 中建八局发展建设有限公司 | Prestress loading type bag type expanded anchor rod for building anti-floating and construction method |
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| CN105350584B (en) | 2017-10-17 |
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