CN116732986A - Construction method for realizing rock entering of anchor rod static pressure pile - Google Patents
Construction method for realizing rock entering of anchor rod static pressure pile Download PDFInfo
- Publication number
- CN116732986A CN116732986A CN202310804723.6A CN202310804723A CN116732986A CN 116732986 A CN116732986 A CN 116732986A CN 202310804723 A CN202310804723 A CN 202310804723A CN 116732986 A CN116732986 A CN 116732986A
- Authority
- CN
- China
- Prior art keywords
- pile
- anchor rod
- rock
- static pressure
- construction method
- 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
- 239000011435 rock Substances 0.000 title claims abstract description 28
- 230000003068 static effect Effects 0.000 title claims abstract description 27
- 238000010276 construction Methods 0.000 title claims abstract description 21
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 28
- 239000010959 steel Substances 0.000 claims abstract description 28
- 238000005553 drilling Methods 0.000 claims abstract description 10
- 238000003825 pressing Methods 0.000 claims description 21
- 238000003466 welding Methods 0.000 claims description 9
- 238000007789 sealing Methods 0.000 claims description 6
- 239000000463 material Substances 0.000 claims description 5
- 238000005265 energy consumption Methods 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 claims 1
- 238000000034 method Methods 0.000 abstract description 7
- 230000002787 reinforcement Effects 0.000 abstract description 7
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000007667 floating Methods 0.000 description 1
- 238000004062 sedimentation Methods 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- 238000009424 underpinning Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D7/00—Methods or apparatus for placing sheet pile bulkheads, piles, mouldpipes, or other moulds
- E02D7/20—Placing by pressure or pulling power
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D13/00—Accessories for placing or removing piles or bulkheads, e.g. noise attenuating chambers
- E02D13/04—Guide devices; Guide frames
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D13/00—Accessories for placing or removing piles or bulkheads, e.g. noise attenuating chambers
- E02D13/08—Removing obstacles
-
- 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
- E02D15/00—Handling building or like materials for hydraulic engineering or foundations
- E02D15/08—Sinking workpieces into water or soil inasmuch as not provided for elsewhere
-
- 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
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D9/00—Removing sheet piles bulkheads, piles, mould-pipes or other moulds or parts thereof
- E02D9/005—Removing sheet piles bulkheads, piles, mould-pipes or other moulds or parts thereof removing the top of placed piles of sheet piles
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D2600/00—Miscellaneous
- E02D2600/30—Miscellaneous comprising anchoring details
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 for realizing rock entering of a static pressure pile of an anchor rod. After the static pressure pile of the anchor rod reaches the top surface of the rock layer, a drill bit is put into the rock layer, and a concrete filled steel tube pile integrally embedded into the rock is poured. On the basis of the existing advantages of the static pressure pile, the invention not only reduces the disturbance of the existing building reinforcement by adopting the whole-process drilling pile to the surrounding environment, but also solves the problem that the anchor rod static pressure pile can not be pressed into rock, improves the single pile bearing capacity of the static pressure pile, and provides a novel reinforcement method for the existing building foundation reinforcement with complex environment and limited operation space.
Description
Technical Field
The invention relates to the technical field of buildings, in particular to a construction method for realizing rock entering of a static pressure pile of an anchor rod.
Background
In the existing building foundation reinforcement, anchor rod static pressure piles are often adopted for foundation treatment or foundation underpinning. The pile pressing frame is fixed by embedding anchor rods on a foundation, dead weight load exerted by a building is used as pile pressing counter force, pile sections are pressed into soil section by section from pile pressing holes reserved or cut in the foundation by using a jack, and then piles and the foundation are connected together, so that the purposes of improving the bearing capacity of the foundation and controlling sedimentation are achieved. Compared with the bored pile, the method has the advantages of light and flexible construction machine, convenient construction, small working surface, indoor construction, low energy consumption, no vibration, no noise, no pollution, no workshop stop during construction, no relocation of residents and the like. However, the anchor rod static pressure pile cannot enter continuously when being pressed to a rock layer or hit a stone, and cannot be used as a rock-socketed pile, so that the single pile bearing capacity of the small-diameter or medium-diameter friction pile is small.
Disclosure of Invention
The invention aims at providing a construction method of an anchor rod static pressure pile which has small disturbance to surrounding environment following foundation and can be embedded into rock aiming at the construction technology of the existing anchor rod static pressure pile.
In order to achieve the above object, the technical solution of the present invention is: the construction method for realizing rock entering of the anchor rod static pressure pile is characterized by comprising the following steps of:
step one, determining a pile position hole and positioning;
step two, drilling a pile hole, and burying an anchor rod;
step three, installing a pile pressing frame;
fourthly, positioning and correcting the first pile section, pressing the pile, and recording the depth and the pressure value;
fifthly, positioning and correcting the next pile, welding the pile, pressing the pile, and recording depth and pressure values. Repeating the step until the pile bottom reaches the top surface of the rock layer;
and step six, a drill bit and a drill rod are arranged in the steel pipe, and a rock layer is drilled to the designed depth. Pouring grouting material into the bottom;
and seventh, filling ordinary concrete into the pile, and sealing the pile.
In the first step, the pile position hole is lofted and positioned on site according to the design drawing, and the plane deviation between the pile position hole and the design position is not more than +/-20 mm.
In the second step, if the pile is pressed on the existing foundation, a pile hole is needed to be drilled; and if the pile is a newly built pile cap, reserving pile pressing holes. The anchor rod is preferably made of finish rolled deformed steel bar.
And thirdly, the pile pressing frame is kept vertical, and nuts of the anchor bolts are uniformly screwed.
And in the fourth step, the pile tip of the first pile is a plain concrete pile tip. The pile section must be held in place vertically so that the jack is held on the same vertical line as the pile section axis and is not biased.
And in the fifth step, the welding pile should remove the rust on the surface, and full welding is carried out to ensure the welding quality.
And in the step six, the lower part of the drill rod is a small steel sleeve slightly smaller than the steel pipe pile, and the range of the small steel sleeve extends from the drill bit to 1.5m in the steel pipe pile. The top of the small steel sleeve is provided with a mechanical rotary locking device which is connected with the small-diameter drill rod. And after drilling into the rock layer to the designed depth, reversely rotating the small-diameter drill rod until the small-diameter drill rod is separated from the small steel sleeve, and taking out the drill rod. The drill bit and small steel casing remain in the hole as part of the steel pipe pile embedded in the rock. Then, pouring inorganic grouting material to the top of the small steel pipe.
The pile head exposed in the step seven must be cut after the design unit agrees. Before pile sealing, sundries in pile pressing holes must be cleaned, and then micro-expansion concrete pile sealing is poured.
The construction method for realizing rock entering of the anchor rod static pressure pile has the following beneficial effects:
according to the construction method for realizing rock entering of the anchor rod static pressure pile, the anchor rod static pressure pile is drilled, so that the anchor rod static pressure pile can be embedded into rock, disturbance of the surrounding environment and the building caused by the whole process of drilling pile adopted in existing building reinforcement is reduced on the basis of the existing advantages of the static pressure pile, the problem that the anchor rod static pressure pile cannot be pressed into the rock is solved, the single pile bearing capacity of the static pressure pile is improved, and a novel reinforcement method is provided for the existing building foundation reinforcement with complex environment and limited operation space.
Drawings
In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the following description will briefly explain the drawings used in the embodiments or the description of the prior art, and it is obvious that the drawings in the following description are only some embodiments of the invention, and that other drawings can be obtained according to these drawings without inventive effort to a person skilled in the art.
FIG. 1 is a schematic diagram of a step of realizing rock entering of a pile end of a static pressure pile of an anchor rod;
Detailed Description
The following description of the embodiments of the present invention will clearly and fully describe the technical aspects of the embodiments of the present invention, and it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present invention without making any inventive effort, are intended to fall within the scope of the present invention.
The present invention will be further described with reference to the accompanying drawings, in order to make the objects, technical solutions and advantages of the present invention more apparent.
Step one, determining pile position holes and positioning. According to the on-site lofting and positioning of the design drawing, the plane deviation between the pile position hole and the design position is not more than +/-20 mm;
and step two, cutting a pile hole, and burying an anchor rod. If the pile is pressed on the existing foundation, a pile hole is needed to be cut; and if the pile is a newly built pile cap, reserving pile pressing holes. The anchor rod is preferably made of finish-rolled deformed steel bar, and the screw thread at the top of the finish-rolled deformed steel bar is more convenient for fixing the pile pressing frame;
and step three, installing a pile pressing frame. The pile pressing frame is kept vertical and the nuts of the anchor bolts are uniformly screwed. The loose screw cap should be screwed at any time in the pile pressing construction process;
and fourthly, positioning and correcting the first pile section 1, pressing the pile, and recording depth and pressure values. The first pile tip adopts a plain concrete pile tip 2. The pile section 1 must be kept in position vertically, the vertical deviation must not exceed 1.5% of the pile section length, so that the jack and the pile section 1 axis remain on the same vertical line and must not be biased. When pile is pressed, a plurality of pile presses are not suitable to be simultaneously constructed on the same independent column base. The sum of pile pressing force should not exceed the dead weight sum of the foundation and the upper structure, so as to prevent the foundation from being damaged by the structure caused by lifting. The middle pause is avoided, and the process should be completed once;
fifthly, positioning and correcting the next pile, welding the pile, pressing the pile, and recording depth and pressure values. This step is repeated until the pile bottom reaches the top surface of the rock layer 3. The preliminary criterion for whether the rock layer 3 is reached is that the jack pressure gauge suddenly increases and the pile body is no longer displaced downwards. At this time, the actual pile length and the design and prospecting data should be combined together. The welding pile should remove the surface rust, carry out full-scale welding, ensure welding quality.
And step six, a drill bit 4 and a drill rod are arranged in the steel pipe pile 1. The drilling machine generally adopts a small geological drilling machine. The lower part of the drill rod is a small steel sleeve 5 slightly smaller than the steel pipe pile, which extends from the drill bit 4 to 1.5m inside the steel pipe pile 1. The top of the small steel sleeve 5 is provided with a mechanical rotary locking device 6 which is connected with a small-diameter drill rod 7. After the drill bit 4 drills through the plain concrete pile tip 2 into the rock layer 3 to a designed depth, the small-diameter drill rod 7 is reversely rotated until the small-diameter drill rod 7 is separated from the small steel sleeve 5, and the small drill rod 7 is taken out. The drill bit 4 and the small steel casing 5 remain in the hole as part of the rock embedding of the steel pipe pile 1. Subsequently, the inorganic grouting material 8 is poured on top of the small steel pipe 5.
And seventhly, cutting the exposed pile head after the pile head is agreed by a design unit, and enabling the pile head to be embedded into the bearing platform to be larger than 50mm. Before cutting the pile head, the pile should be fixed by wedges so as to remove the pile head, and the pile head is forbidden to be randomly cut under the condition of a cantilever. And filling ordinary concrete 9 into the pile body. Before pile sealing, sundries in pile pressing holes must be cleaned, accumulated water is removed, floating slurry on hole walls and pile faces is cleaned, and then micro-expansion concrete pile sealing is poured.
Finally, it should be noted that the foregoing is merely a preferred embodiment of the present invention, and the present invention has been described in detail with reference to the embodiment, but it should be understood that modifications, equivalents, improvements and modifications to the technical solution described in the foregoing embodiments or equivalents of some of the technical features may be made within the spirit and principles of the present invention.
Claims (5)
1. The construction method for realizing rock entering of the anchor rod static pressure pile is characterized by comprising the following steps of:
step one, determining a pile position hole and positioning;
step two, drilling a pile hole, and burying an anchor rod;
step three, installing a pile pressing frame;
fourthly, positioning and correcting the first pile section, pressing the pile, and recording the depth and the pressure value;
fifthly, positioning and correcting the next pile, welding the pile, pressing the pile, and recording depth and pressure values. Repeating the step until the pile bottom reaches the top surface of the rock layer;
and step six, a drill bit and a drill rod are arranged in the steel pipe, and a rock layer is drilled to the designed depth. Pouring grouting material into the bottom;
and seventh, filling ordinary concrete into the pile, and sealing the pile.
2. A construction method for realizing rock-entering of a static pile of an anchor rod according to claim 1, wherein: the pile tip is embedded in the rock.
3. A construction method for realizing rock-entering of a static pile of an anchor rod according to claim 1, wherein: the construction machine is light and flexible, convenient to construct, small in working area, capable of being constructed indoors, low in energy consumption, free of pollution, free of production stopping in workshops and free of movement of residents during construction.
4. A construction method for realizing rock-entering of a static pile of an anchor rod according to claim 1, wherein: the pile driver adopts a small geological drilling machine, and the drill bit and part of drill rods are not taken out after the drilling is completed.
5. A construction method for realizing rock-entering of a static pile of an anchor rod according to claim 1, wherein: the steel pipe pile consists of a static pressure steel pipe pile section and a drilling steel pipe pile section, and inorganic grouting material and common concrete are poured into the steel pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310804723.6A CN116732986A (en) | 2023-06-30 | 2023-06-30 | Construction method for realizing rock entering of anchor rod static pressure pile |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310804723.6A CN116732986A (en) | 2023-06-30 | 2023-06-30 | Construction method for realizing rock entering of anchor rod static pressure pile |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116732986A true CN116732986A (en) | 2023-09-12 |
Family
ID=87918429
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310804723.6A Pending CN116732986A (en) | 2023-06-30 | 2023-06-30 | Construction method for realizing rock entering of anchor rod static pressure pile |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116732986A (en) |
-
2023
- 2023-06-30 CN CN202310804723.6A patent/CN116732986A/en active Pending
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| 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 | ||
| CB02 | Change of applicant information |
Address after: Jucheng Building, No. 4 Wudayuan Road, Donghu New Technology Development Zone, Wuhan City, Hubei Province, 430223 Applicant after: Wuhan Jucheng Structure Group Co.,Ltd. Address before: Jucheng Building, No. 4 Wudayuan Road, Donghu New Technology Development Zone, Wuhan City, Hubei Province, 430223 Applicant before: WUDA JUCHENG STRUCTURE Co.,Ltd. |
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| CB02 | Change of applicant information |