CN113338362A - Construction method of cage core bag bottom-expanding grouting anchor rod static pressure steel pipe pile - Google Patents
Construction method of cage core bag bottom-expanding grouting anchor rod static pressure steel pipe pile Download PDFInfo
- Publication number
- CN113338362A CN113338362A CN202110620015.8A CN202110620015A CN113338362A CN 113338362 A CN113338362 A CN 113338362A CN 202110620015 A CN202110620015 A CN 202110620015A CN 113338362 A CN113338362 A CN 113338362A
- Authority
- CN
- China
- Prior art keywords
- pile
- bag
- anchor rod
- steel pipe
- grouting
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 48
- 239000010959 steel Substances 0.000 title claims abstract description 48
- 238000010276 construction Methods 0.000 title claims abstract description 31
- 230000003068 static effect Effects 0.000 title claims abstract description 27
- 238000003825 pressing Methods 0.000 claims abstract description 39
- 239000004568 cement Substances 0.000 claims abstract description 20
- 239000002689 soil Substances 0.000 claims abstract description 12
- 238000007789 sealing Methods 0.000 claims abstract description 7
- 238000004140 cleaning Methods 0.000 claims abstract description 6
- 239000000463 material Substances 0.000 claims abstract description 6
- 238000005553 drilling Methods 0.000 claims abstract description 4
- 239000002002 slurry Substances 0.000 claims description 40
- 238000000034 method Methods 0.000 claims description 14
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 12
- 238000003466 welding Methods 0.000 claims description 8
- 238000004873 anchoring Methods 0.000 claims description 5
- 238000007599 discharging Methods 0.000 claims description 5
- 238000002347 injection Methods 0.000 claims description 4
- 239000007924 injection Substances 0.000 claims description 4
- 238000005507 spraying Methods 0.000 claims description 4
- 239000004575 stone Substances 0.000 abstract description 2
- 238000009435 building construction Methods 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- GOLXNESZZPUPJE-UHFFFAOYSA-N spiromesifen Chemical compound CC1=CC(C)=CC(C)=C1C(C(O1)=O)=C(OC(=O)CC(C)(C)C)C11CCCC1 GOLXNESZZPUPJE-UHFFFAOYSA-N 0.000 description 2
- 230000005856 abnormality Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000003631 expected effect Effects 0.000 description 1
- 230000004927 fusion Effects 0.000 description 1
- 239000011440 grout Substances 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D37/00—Repair of damaged foundations or foundation structures
-
- 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
- E02D5/22—Piles
- E02D5/34—Concrete or concrete-like piles cast in position ; Apparatus for making same
- E02D5/38—Concrete or concrete-like piles cast in position ; Apparatus for making same making by use of mould-pipes or other moulds
-
- 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
- E02D5/38—Concrete or concrete-like piles cast in position ; Apparatus for making same making by use of mould-pipes or other moulds
- E02D5/44—Concrete or concrete-like piles cast in position ; Apparatus for making same making by use of mould-pipes or other moulds with enlarged footing or enlargements at the bottom of the pile
-
- 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
Landscapes
- 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 construction method of a cage core bag bottom-expanding grouting anchor rod static pressure steel pipe pile, which comprises the following steps: 1) embedding an anchor rod: arranging an anchor rod hole on the foundation slab, and pouring by adopting high-strength grouting material; 2) pile pressing holes are formed in the existing foundation bottom plate; 3) installing a pile pressing frame; 4) pile sinking; 5) cleaning a soil plug; 6) adopting a special drilling machine to carry out rotary jet reaming at the pile end, and 7) connecting the grouting pipe and the exhaust pipe into a bag grouting opening, and inserting the bag into the pile end; 8) grouting a bag; 9) and (5) filling a long core in the steel pipe, and loading and sealing the pile. The invention forms a steel wire cage cement stone block expanded head at the pile end by grouting the cage core bag so as to greatly improve the bearing capacity of the pile end, thereby enabling the resistance provided by the soil layer to be matched with the strength of the pile body, exerting the advantage of high strength of the steel pipe, having high performance ratio, saving the construction cost and having wide application prospect.
Description
Technical Field
The invention belongs to the technical field of building construction, and particularly relates to a construction method of a cage core bag bottom-expanding grouting anchor rod static pressure steel pipe pile.
Background
The anchor rod static pressure steel pipe pile is often applied to accident prevention and remedy, structure storey-adding reconstruction and expansion and new construction caused by overlarge uneven deformation of a foundation, adjacent building construction and deep foundation pit engineering.
Considering the soil penetrating capability and the soil squeezing effect, an open pile tip is usually adopted in practical application, and because the soil plug is squeezed upwards along the pipe in the pile sinking process, the incomplete blocking reduction causes the end resistance to be reduced, so that the strength advantage of the steel pipe cannot be exerted, and the method is uneconomical.
Disclosure of Invention
Aiming at the problems in the prior art, the invention aims to provide a construction method of a cage core bag bottom-expanding grouting anchor rod static pressure steel pipe pile.
The invention is realized by the following technical scheme:
the construction method of the cage core bag bottom-expanding grouting anchor rod static pressure steel pipe pile is characterized by comprising the following steps of:
1) embedding an anchor rod: the foundation slab is provided with an anchor rod hole, high-strength grouting material is adopted for pouring, the hole is arranged to be perpendicular to the anchor rod embedding, the hole is flushed cleanly, and the anchor rod embedding is stable and firm;
2) pile pressing holes are formed in the existing foundation slab: forming a pile pressing hole by using a static pressure water drill micro-inclination coring process;
3) installing a pile pressing frame: the pile pressing frame needs to be kept vertical, the screw caps of the anchoring screw rods should be screwed up evenly, and the loosened screw caps should be screwed up at any time in the pile pressing construction process;
4) pile sinking: pile section sinking and pressing are carried out section by section, and pile section sinking and pressing and pile section welding are carried out in a staggered mode;
5) cleaning a soil plug;
6) a special drilling machine is adopted to carry out rotary spraying and reaming at the pile end;
7) connecting the grouting pipe and the exhaust pipe to a bag grouting opening, and inserting the bag into the pile end;
8) grouting a bag: injecting relatively thick cement slurry into the bag through the grouting pipe, placing the slurry into the bag to displace and discharge air in the bag from the exhaust pipe, expanding the bag by the slurry after the air in the bag is discharged completely so as to extrude the slurry in the anchor hole outside the bag, and discharging the slurry from the orifice of the steel pipe; the bag is not expanded after being expanded to the maximum size, the slurry outlet from the orifice of the steel pipe is gradually stopped, the slurry outlet of the exhaust pipe is started, and when the exhaust pipe does not contain bubbles or water, the bag is filled, and the slurry injection is finished;
9) and (5) pouring a core in the steel pipe, and loading and sealing the pile.
The construction method of the cage core bag bottom-expanding grouting anchor rod static pressure steel pipe pile is characterized in that the aperture of an anchor rod hole in the step 1) is 65 mm.
The construction method of the cage core bag bottom expanding grouting anchor rod static pressure steel pipe pile is characterized in that in the step 2), the size of the pile pressing hole is +50mm of the upper opening pile diameter, and the size of the lower opening pile diameter is +100mm, and the pile pressing hole is approximately horn-shaped.
The construction method of the cage core bag bottom-expanding grouting anchor rod static pressure steel pipe pile is characterized in that anchor rod holes are located around a pile pressing hole.
The construction method of the cage core bag bottom expanding grouting anchor rod static pressure steel pipe pile is characterized in that in the pile section sinking process in the step 4), the front three sections are slowly pressed in, good verticality must be kept, the inclination rate is less than 1%, and two infrared ray cast-in-line instruments are adopted to control the verticality of each section of the pile in real time during pile sinking.
The construction method of the cage core bag bottom expanding grouting anchor rod static pressure steel pipe pile is characterized in that in the step 7), the bag is inserted into the pile end as soon as possible after the cement slurry hole expanding is completed, and the initial setting time of the cement slurry cannot be exceeded at the latest.
The construction method of the cage core bag bottom-expanding grouting anchor rod static pressure steel pipe pile is characterized in that the thicker cement paste in the step 8) is water cement ratio of 0.4-0.6.
The invention forms a steel wire cage cement stone block expanded head at the pile end by grouting the cage core bag so as to greatly improve the bearing capacity of the pile end, thereby enabling the resistance provided by the soil layer to be matched with the strength of the pile body, exerting the advantage of high strength of the steel pipe, having high performance ratio, saving the construction cost and having wide application prospect.
Drawings
FIG. 1 is a schematic view of the overall structure of the present invention;
in the figure, 1-foundation slab, 2-anchor rod, 3-pile pressing hole, 4-bag, 5-grouting pipe, 6-exhaust pipe and 7-steel pipe.
Detailed Description
The invention is described in further detail below with reference to the accompanying drawings, and specific embodiments are given.
As shown in fig. 1, the construction method of the cage core bag bottom-expanding grouting anchor rod static pressure steel pipe pile of the invention comprises the following steps:
the method comprises the following steps: embedding an anchor rod: the foundation slab is provided with a phi 65 anchor rod hole, high-strength grouting material is adopted for pouring, the hole is arranged to be perpendicular to the anchor rod embedding, the hole is flushed cleanly, and the anchor rod embedding is stable and firm.
Step two: the existing foundation plate is provided with a pile pressing hole: and forming a pile pressing hole by using a static pressure water drill micro-inclination coring process. The diameter of the upper opening pile of the pore-forming size is plus 50mm, and the diameter of the lower opening pile is plus 100mm, and the shape is approximately horn-shaped.
Step three: and installing a pile pressing frame, wherein the pile pressing frame is kept vertical, the screw caps of the anchoring screw rods are screwed up in a balanced manner, and the loosened screw caps are screwed up at any time in the pile pressing construction process.
Step four: pile sinking: pile section sinking is carried out section by section, and pile section sinking and pressing and pile section welding are carried out in a staggered mode. The front three sections are slowly pressed in, good verticality must be kept, the inclination rate is less than 1%, and the verticality of each section of pile is controlled in real time by two infrared ray demarcation devices when the pile is sunk and pressed.
Step five: and (5) clearing the soil plug.
Step six: a special drilling machine is adopted to carry out rotary spraying and reaming at the pile end;
step seven: the grouting pipe is connected to the grouting opening of the bag, and the bag is inserted into the pile end. The bag should be inserted as soon as possible after the cement slurry is reamed, and the initial setting time of the cement slurry should not be exceeded at the latest.
Step eight: grouting a bag: injecting thick cement slurry (water-cement ratio is 0.4-0.6) into the bag through the grouting pipe, placing the slurry into the bag to replace and discharge the air-filled and air-discharged pipe in the bag, expanding the bag by the slurry after the air in the bag is discharged completely so as to extrude the slurry in the anchor hole outside the bag, and discharging the slurry from the orifice of the steel pipe; the bag is not expanded after being expanded to the maximum size, the slurry outlet of the opening of the steel pipe is gradually stopped, the slurry outlet of the exhaust pipe is started, and when the exhaust pipe does not contain bubbles or water, the bag is filled, and the slurry injection is completed.
Step nine: and (5) pouring a core in the steel pipe, and loading and sealing the pile.
Example (b):
the foundation settlement control project of a certain high-rise residential building is a shear wall structure with 33 layers above the ground and 1 layer below the ground, the total building area is 14470 square meters, a PHC pipe pile and a raft foundation are adopted, and a 5-fine sand layer is taken as a bearing layer. Before the main building is delivered, the difference settlement caused by the large settlement rate of the building is found, so that the bearing capacity of the pile foundation is supplemented by the cage core bag bottom-expanding grouting anchor rod static pressure steel pipe pile, and the settlement is controlled. After the pile is supplemented for 3 months, the settlement rate of the house is less than 0.04mm/d, the settlement is stable, and the expected effect of the design is achieved. A construction method of a cage core bag bottom-expanding grouting anchor rod static pressure steel pipe pile specifically comprises the following steps:
processing the steel pipe pile:
the length of the standard pile section is 1.5-2.0 m/section, each pile section is numbered, and the cut of the steel pipe requires that the blanking is smooth and has no burrs. The end opening of the steel pipe pile is provided with a reinforcing sleeve with the thickness of 10mm, and the steel pipe with the same diameter is cut in half and welded outside the pile wall.
Embedding an anchor rod:
the bottom plate is provided with a phi 65 anchor rod hole with the depth of 600mm, C60 grouting material is high in strength and free of shrinkage for anchoring, and after grouting material grouting is completed, water spraying and covering maintenance are carried out in time, and the maintenance time is not less than 4 days.
Pile pressing hole forming:
when pile pressing holes are formed in an existing foundation slab, the pile pressing holes are formed by adopting a static pressure water drill micro-inclination core hole forming process, the number of the core holes is 14, the diameter of the upper opening of each pile hole is 400mm, the diameter of the lower opening of each pile hole is 450mm, the depth of each hole is 1000mm, and the wall of each pile pressing hole needs to be roughened before pile sealing.
Pile sinking construction:
(1) checking an anchor rod and a pile machine, cleaning a pile hole, and cleaning the wall of the pile hole;
(2) the pile pressing frame needs to be kept vertical, the screw caps of the anchoring screw rods should be screwed up evenly, and the loosened screw caps should be screwed up at any time in the pile pressing construction process;
(3) the pile section is in place and must be kept vertical, so that the jack is overlapped with the pile section and the axial line of the pile pressing hole and cannot be biased;
(4) pile section sinking is carried out section by section, and pile section sinking and pressing and pile section welding are carried out in a staggered mode. The first three sections are slowly pressed in, and good verticality must be kept, and the inclination rate is less than 1%;
(5) subsequent connection must guarantee that the pile body is straight from top to bottom, forbid rectifying pile pressing, forbid the overlap joint of filling pieces, the pile pressing construction must stop midway, should put in place once.
(6) The pile section welding quality is particularly important, and each set of pile pressing machinery is specially provided with 1 professional welder and is responsible for the welding operation construction of the steel pipe pile. After the upper pile section and the lower pile section are vertically aligned, the semi-automatic gas protection butt fusion welding connection of the inner lining ring groove is adopted, and the quality grade of a welding line is 2 grade.
(7) In the pile pressing process, a specially-assigned person is required to be responsible for commanding operation, the specially-assigned person carries out pressure gauge reading recording and pressure curve drawing, and related recording conditions are reported to a technician immediately when abnormality is found so as to judge whether pile sinking quality meets requirements.
Cleaning a soil plug:
the high-pressure air and water are used to flush the soil plug in the steel pipe.
Reaming the pile end:
and (3) a high-pressure jet pile machine is adopted to carry out rotary jet on the pile end soil by using slurry, and the diameter is not less than 1.0 m.
Inserting the pile end into the sac:
and (3) connecting the grouting pipe to a grouting port of the bag, inserting the bag into the pile end, and inserting the bag into the pile end as soon as possible after the hole expansion of the cement paste is completed, wherein the initial setting time of the cement paste must not be exceeded at the latest.
Grouting by a grout bag:
injecting thick cement slurry (water-cement ratio is 0.4-0.6) into the bag through the grouting pipe, placing the slurry into the bag to replace and discharge the air-filled and air-discharged pipe in the bag, expanding the bag by the slurry after the air in the bag is discharged completely so as to extrude the slurry in the anchor hole outside the bag, and discharging the slurry from the orifice of the steel pipe; the bag is not expanded after being expanded to the maximum size, the slurry outlet of the opening of the steel pipe is gradually stopped, the slurry outlet of the exhaust pipe is started, and when the exhaust pipe does not contain bubbles or water, the bag is filled, and the slurry injection is completed.
And (5) filling cores and sealing piles.
And pouring concrete into the steel pipe in a through-length mode, and preloading and pile sealing.
Claims (7)
1. A construction method of a cage core bag bottom-expanding grouting anchor rod static pressure steel pipe pile is characterized by comprising the following steps:
1) embedding an anchor rod: an anchor rod hole is formed in the foundation slab (1), high-strength grouting material is adopted for pouring, the hole is formed to be perpendicular to the embedding of the anchor rod (2), and the anchor rod (2) is flushed cleanly, so that the embedding stability and firmness of the anchor rod (2) are ensured;
2) the existing foundation slab (1) is provided with a pile pressing hole (3): forming a pile pressing hole by using a static pressure water drill micro-inclination coring process;
3) installing a pile pressing frame: the pile pressing frame needs to be kept vertical, the screw caps of the anchoring screw rods should be screwed up evenly, and the loosened screw caps should be screwed up at any time in the pile pressing construction process;
4) pile sinking: pile section sinking and pressing are carried out section by section, and pile section sinking and pressing and pile section welding are carried out in a staggered mode;
5) cleaning a soil plug;
6) a special drilling machine is adopted to carry out rotary spraying and reaming at the pile end;
7) connecting the grouting pipe and the exhaust pipe to a bag grouting opening, and inserting a bag (4) into the pile end;
8) grouting a bag: injecting relatively thick cement slurry into the bag through the grouting pipe (5), discharging air in the bag from the exhaust pipe (6) by replacing the slurry into the bag, expanding the bag (4) by the slurry after the air in the bag is discharged completely so as to extrude the slurry in the anchor hole outside the bag, and discharging the slurry from the orifice of the steel pipe; the bag (4) is not expanded after being expanded to the maximum size, the slurry outlet from the orifice of the steel pipe is gradually stopped, the slurry outlet of the exhaust pipe (6) is started, and when the slurry is discharged and does not contain bubbles or water, the bag is filled, and the slurry injection is finished;
9) and (5) filling a long core in the steel pipe, and loading and sealing the pile.
2. The construction method of the cage core bag bottom-expanding grouting anchor rod static pressure steel pipe pile as claimed in claim 1, wherein the diameter of the anchor rod hole in the step 1) is 65 mm.
3. The construction method of the cage core bag bottom-expanding grouting anchor rod static pressure steel pipe pile according to claim 1, characterized in that in the step 2), the size of the pile hole (3) is +50mm of the upper opening pile diameter, and the size of the lower opening pile diameter is +100mm, and the pile hole is approximately horn-shaped.
4. The construction method of the cage core bag bottom-expanding grouting anchor rod static pressure steel pipe pile according to claim 1, characterized in that the anchor rod holes are positioned around the pile pressing hole (3).
5. The construction method of the cage core bag bottom-expanding grouting anchor rod static pressure steel pipe pile according to claim 1, characterized in that in the pile section sinking process in the step 4), the first three sections are slowly pressed in and must maintain good verticality, the inclination rate is less than 1%, and two infrared ray demarcation devices are adopted to control the verticality of each section of the pile in real time when the pile is sunk.
6. The construction method of the cage core bag bottom-expanding grouting anchor rod static pressure steel pipe pile according to the claim 1, characterized in that in the step 7), the bag (4) should be inserted into the pile end as soon as possible after the cement slurry hole-expanding is completed, and the initial setting time of the cement slurry should not be exceeded at the latest.
7. The construction method of the cage core bag bottom-expanding grouting anchor rod static pressure steel pipe pile as claimed in claim 1, wherein the thicker cement paste in the step 8) is water cement ratio of 0.4-0.6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110620015.8A CN113338362A (en) | 2021-06-03 | 2021-06-03 | Construction method of cage core bag bottom-expanding grouting anchor rod static pressure steel pipe pile |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110620015.8A CN113338362A (en) | 2021-06-03 | 2021-06-03 | Construction method of cage core bag bottom-expanding grouting anchor rod static pressure steel pipe pile |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113338362A true CN113338362A (en) | 2021-09-03 |
Family
ID=77473508
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110620015.8A Pending CN113338362A (en) | 2021-06-03 | 2021-06-03 | Construction method of cage core bag bottom-expanding grouting anchor rod static pressure steel pipe pile |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113338362A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113818500A (en) * | 2021-09-14 | 2021-12-21 | 杭州圣基建筑特种工程有限公司 | Integral lifting and inclination-correcting construction method for high-rise building foundation and structure |
| CN113914378A (en) * | 2021-11-11 | 2022-01-11 | 杭州圣基建筑特种工程有限公司 | Method suitable for preventing water leakage during post-opening pile pressing hole pile sealing |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108265718A (en) * | 2018-03-12 | 2018-07-10 | 中国建筑第八工程局有限公司 | Grouting steel pipe pile foundation stabilization system and its construction method |
-
2021
- 2021-06-03 CN CN202110620015.8A patent/CN113338362A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108265718A (en) * | 2018-03-12 | 2018-07-10 | 中国建筑第八工程局有限公司 | Grouting steel pipe pile foundation stabilization system and its construction method |
Non-Patent Citations (1)
| Title |
|---|
| 靖向党: "《高等专科学校数学用书钻孔工程》", 28 February 1992, 冶金工业出版社 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113818500A (en) * | 2021-09-14 | 2021-12-21 | 杭州圣基建筑特种工程有限公司 | Integral lifting and inclination-correcting construction method for high-rise building foundation and structure |
| CN113914378A (en) * | 2021-11-11 | 2022-01-11 | 杭州圣基建筑特种工程有限公司 | Method suitable for preventing water leakage during post-opening pile pressing hole pile sealing |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110230309B (en) | Karst area bridge karst cave pile foundation construction method | |
| CN111576403B (en) | Pile splicing structure and bearing platform anchoring structure using PHC tubular pile | |
| CN113338362A (en) | Construction method of cage core bag bottom-expanding grouting anchor rod static pressure steel pipe pile | |
| CN111364532B (en) | Existing pile foundation reinforcement method based on slurry control | |
| CN114215042A (en) | Miniature steel pipe pile for reinforcing foundation and construction method thereof | |
| CN111455973A (en) | Composite foundation structure of prefabricated solid CFG pile and construction method thereof | |
| CN113756278B (en) | Construction method of prestressed pipe pile | |
| CN112855029B (en) | Goaf drilling external pipe expansion construction method | |
| CN110735642A (en) | shield originating end combined type reinforcing structure and construction method thereof | |
| CN111535305A (en) | Construction method of cast-in-situ bored pile for air well | |
| CN216339582U (en) | Combined inclined support for foundation pit support | |
| CN216664152U (en) | Water sealing structure for anchorage support | |
| CN113914378A (en) | Method suitable for preventing water leakage during post-opening pile pressing hole pile sealing | |
| CN212452659U (en) | A diagonal bracing screw thread pile supporting construction for foundation ditch enclosure | |
| CN115012955A (en) | Construction method for large pipe shed at inlet of multi-arch tunnel | |
| CN108729938B (en) | Large-size restraint rod for enhancing stability of tunnel primary support structure | |
| CN210797604U (en) | Manual hole digging pile water stopping structure | |
| CN113266019A (en) | Construction method of foundation pit steel pipe support system | |
| CN101713198B (en) | Method and equipment for repairing flaws of clamped sand, splits and defect sites of underground building curtain | |
| CN112095616A (en) | Construction method of replaceable type inserted steel fender post based on MJS construction method | |
| CN220365040U (en) | Foundation system suitable for building soft sandwich foundation | |
| CN218090818U (en) | PHC tubular pile with special pile shoe | |
| CN218027734U (en) | Embedded type isolation pile embedded into grouting pipe | |
| CN218437006U (en) | Self-drilling high-pressure jet grouting pile | |
| CN215758995U (en) | High-pressure jet grouting bottom-expanding prefabricated combined pile |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20210903 |