CN112281819A - Highway soft soil foundation prefabricated friction type pile and method - Google Patents
Highway soft soil foundation prefabricated friction type pile and method Download PDFInfo
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- CN112281819A CN112281819A CN202011222104.9A CN202011222104A CN112281819A CN 112281819 A CN112281819 A CN 112281819A CN 202011222104 A CN202011222104 A CN 202011222104A CN 112281819 A CN112281819 A CN 112281819A
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- pile
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
- E02D5/22—Piles
- E02D5/24—Prefabricated piles
- E02D5/30—Prefabricated piles made of concrete or reinforced concrete or made of steel and concrete
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D3/00—Improving or preserving soil or rock, e.g. preserving permafrost soil
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D33/00—Testing foundations or foundation structures
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- General Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Agronomy & Crop Science (AREA)
- Environmental & Geological Engineering (AREA)
- Soil Sciences (AREA)
- Piles And Underground Anchors (AREA)
Abstract
The invention provides a friction type pile and a method for prefabricating a soft soil foundation on a highway, which comprises the following steps: the pile body, dynamometer and spacing pipe connected with the pile body; the limiting pipe is internally used for placing a limiting sheet, the dynamometer passes through the limiting pipe to enable a force measuring point to be in a region to be measured, and the dynamometer is limited or opened by adjusting the position of the limiting sheet; piles need to be buried in an danger zone, but whether the piles provide required stress cannot be determined, the precast piles can be monitored and repaired in time, and the safety factor of a foundation pit is greatly improved; compared with the traditional method for measuring the pile body stress, the method has the advantages that the measuring depth can be greatly deepened by arranging the sensor inside, and the installation is convenient without the guidance of technicians on workers; the problems of breakage and the like of the pile body can be analyzed in advance through data so as to prevent engineering disasters.
Description
Technical Field
The disclosure belongs to the field of constructional engineering, and particularly relates to a method for online monitoring a precast pile and determining the working state of the precast pile for a soft soil foundation of a road.
Background
The method for monitoring the strength of the friction type pile and determining most of the working state of the friction type pile on the site of the existing highway soft soil foundation engineering is to use an additional sensor, and the technology has the following defects:
(1) the requirement on construction workers is high by adopting an additional sensor;
(2) the damage of an additional sensor is easily caused in the construction process, and the condition of a pile below the underground pile after the prefabricated pile is welded and inserted in a field combined mode cannot be well reflected;
(3) in the prior art, the contact between the soil body and the pile body is poor due to the position of the sensor, and data errors are easily caused due to the difficulty in signal transmission.
Disclosure of Invention
According to the defects of the prior art, the method for prefabricating the friction type pile on the soft soil foundation of the road and determining the working state of the friction type pile can effectively solve the problem that the soil pressure on the side surface of the precast pile is measured or whether the working condition of the whole precast pile exists in the prior art, and is simple for construction workers and does not need to be guided by additional technical personnel.
In a first aspect, the present disclosure provides a friction-type precast pile for a soft soil foundation of a road, including: the pile body, dynamometer and spacing pipe connected with the pile body; spacing intraductal being used for placing spacing piece, the dynamometer passes and makes the force measuring point be in the region of awaiting measuring behind the spacing pipe, realizes carrying on spacingly or opening the dynamometer through adjusting spacing piece position.
In a second aspect, the present disclosure provides a method for manufacturing a friction type pile prefabricated on a soft soil foundation of a road according to the first aspect, comprising:
putting the prefabricated specific reinforcing steel pipe and other reinforcing steel bars into a model of the pile body, and adding concrete below a set depth for stirring and vibrating;
after the vibration is finished, assembling the dynamometer and the sensor, placing the dynamometer and the sensor in a model of the pile body, inserting the steel sheet into a specific steel pipe, and installing the spring dynamometer combination device; and pouring concrete above the pile body and stirring to form the prefabricated friction type pile.
In a third aspect, the present disclosure also provides a method for determining the working state of the friction type pile prefabricated on the soft soil foundation of the road according to the first aspect, which includes the following steps:
conveying the formed prefabricated friction type pile to a construction site for assembling and splicing;
the steel sheet is drawn out from the reserved opening at the upper part, the spring dynamometer in the pile body pushes the steel bar to probe the soil body, the lateral pressure given by the soil body received by the pile body can be obtained, and the lateral pressure is transmitted to a ground monitoring center through the sensor, so that whether the working state of the pile body achieves the expected effect or not is monitored in real time.
Compared with the prior art, this disclosure possesses following beneficial effect:
1. the method adopts a dynamometer and a limit pipe which are connected with a pile body; spacing intraductal being used for placing spacing piece, the dynamometer passes and makes the force measuring point be in the region of awaiting measuring behind the spacing pipe, realizes carrying on spacingly or opening the dynamometer through adjusting spacing piece position, has solved and has buried the stake underground in danger area, but can not confirm whether the stake provides required stress problem, can in time monitor and mend and establish the precast pile, has improved foundation ditch factor of safety greatly.
2. According to the method, the steel sheet is pulled out from the reserved opening above, the spring dynamometer in the pile body pushes the steel bar to touch the soil body, the lateral pressure given by the soil body received by the pile body can be obtained, compared with the conventional method for measuring the stress of the pile body, the sensor is arranged in the pile body, the measuring depth can be greatly increased, and the method is convenient to install and does not need a technician to guide workers.
3. This openly passes to the surveillance center on ground through the sensor, and whether real-time supervision pile body's operating condition reaches the expectancy effect, can go out the pile body through data analysis in advance and whether can take place the rupture scheduling problem to prevent the emergence of engineering disaster.
Advantages of additional aspects of the disclosure will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the disclosure.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the application and, together with the description, serve to explain the application and are not intended to limit the application.
FIG. 1 is a state of the present disclosure before a steel sheet is extracted;
FIG. 2 is a state of the present disclosure after a steel sheet is extracted;
FIG. 3 is a top view of the present disclosure;
FIG. 4 is a view of the present disclosure where upper and lower stakes meet;
fig. 5 is a view of the butt joint of upper and lower specific steel pipes and steel sheets of the present disclosure;
in the figure: 1-1, a spring; 1-2, a sensor; 1-3, steel bars; 1-4, steel sheet; 1-5, special steel bar pipes; 1-6, pile body; 3-1, a built-in sensor; 3-2, steel pipes; 3-3, arranging a pipeline (placing a steel bar and a spring); 4-1, special steel bar pipes; 4-2, pile body; 4-3, steel bar(s); 4-4, steel sheets; 4-5, a groove capable of being inserted with a steel bar; 5-1, steel sheet; 5-2, special steel bar pipes; 5-3, overlapping the steel sheets; 5-4, welding the steel sheet; 5-5, arranging a steel sheet inside; 5-6, sealing the opening of the black adhesive tape.
The specific implementation mode is as follows:
the present disclosure is further described with reference to the following drawings and examples.
It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the disclosure. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.
Example 1
As shown in fig. 1, a friction type pile for prefabricating a soft soil foundation on a road comprises: the pile body, dynamometer, sensor and spacing pipe connected with the pile body; the dynamometer passes through the limiting pipe to enable the force measuring point to be located in the area to be measured, and the limiting pipe limits or opens the dynamometer by adjusting the position of the limiting piece, so that the force measuring point is stretched out to perform force measuring on the area to be measured when the dynamometer reaches the area to be measured.
Furthermore, one side of the pile body is provided with a groove, and the groove is used for mounting a dynamometer and a sensor; the one end vertically of recess sets up the through hole, and the spacing pipe of through hole in-mounting, spacing pipe are used for the spacing piece of holding, and spacing piece restricts the position of dynamometer, is in operating position when prefabricated friction type stake, carries out the dynamometry with the dynamometer to the work area through taking out spacing piece to through the sensor with measured data transmission to the surveillance center on ground.
Further, the through hole penetrates through two sides of the pile body through the groove, so that a plurality of prefabricated friction type piles can be spliced and combined to prolong the working size of the pile body.
Furthermore, the dynamometer can be an anchor cable dynamometer, a pore water pressure gauge, a steel wire type reinforcing steel bar dynamometer or a spring dynamometer; as one embodiment, the dynamometer is a spring dynamometer, one end of the spring dynamometer is connected with the sensor, the other end of the spring dynamometer is connected with one end of the steel rod, and the other end of the steel rod is a free end and can be limited through a limiting sheet or is positioned in a working area and used for transmitting soil pressure to the spring dynamometer; specifically, as shown in fig. 3, one end of the sensor is connected with the built-in pipeline, and a steel bar and a spring dynamometer are installed in the built-in pipeline.
Furthermore, the limiting pipe is a specific steel pipe, and the limiting sheet is a steel sheet.
Further, the pile body includes pile body and lower pile body, and upper and lower pile body all is connected with dynamometer, sensor and spacing pipe. Specifically, as shown in fig. 4, a steel bar is arranged on the upper pile body at the contact position of the upper pile body and the lower pile body, and a groove matched with the steel bar is formed on the lower pile body; the limiting pipe of the upper pile body can be superposed with the limiting pipe of the lower pile body and can be sealed by a black adhesive tape, welded or fixed by bolts; the limiting sheet of the upper pile body can be coincided with the limiting sheet of the lower pile body and can be fixed by welding.
Further, as shown in fig. 5, a steel sheet overlapping process is schematically illustrated, and a steel sheet overlapping portion 5-3 is formed by overlapping, then a welded steel sheet portion 5-4 is formed by welding, and a specific steel pipe is overlapped and sealed by a black adhesive tape, so that a black adhesive tape sealing portion 5-6 is formed.
Example 2
The present disclosure also provides a method for manufacturing a friction type pile prefabricated on a soft soil foundation of a road according to embodiment 1, including:
putting the prefabricated specific reinforcing steel pipe and other reinforcing steel bars into a model of the pile body, and adding concrete below a set depth for stirring and vibrating;
after the vibration is finished, assembling the dynamometer and the sensor, placing the dynamometer and the sensor in a model of the pile body, inserting the steel sheet into a specific steel pipe, and installing the spring dynamometer combination device; and pouring concrete above the pile body and stirring to form the prefabricated friction type pile.
Example 3
The present disclosure also provides a method for determining the working state of a friction type pile prefabricated on a soft soil foundation of a road as described in the above embodiments, comprising the following steps:
conveying the formed prefabricated friction type pile to a construction site for assembling and splicing;
the steel sheet is drawn out from the reserved opening at the upper part, the spring dynamometer in the pile body pushes the steel bar to probe the soil body, the lateral pressure given by the soil body received by the pile body can be obtained, and the lateral pressure is transmitted to a ground monitoring center through the sensor, so that whether the working state of the pile body achieves the expected effect or not is monitored in real time.
Further, the concrete steps of conveying the formed prefabricated friction type pile to a construction site for assembling and splicing comprise,
transporting the piles to a construction site, assembling according to a set label sequence, removing adhesive tapes at the upper openings of the piles to be combined according to a design label, and welding and combining steel sheets of the upper piles and the lower piles to be combined;
then winding and sealing the specific steel pipe by using a black adhesive tape;
finally, aligning and inserting the reserved holes of the upper pile and the lower pile with the reserved steel bars, determining that the whole is on the same vertical axis according to the design, and pouring concrete to combine the upper pile and the lower pile;
and sequentially splicing all parts of the precast pile according to preset marks according to the steps.
Specifically, the method for determining the working state of the friction type pile prefabricated on the soft soil foundation of the highway comprises the following steps of:
(1) before factory construction, assembling the spring dynamometer and the sensor;
(2) putting the prefabricated specific reinforcing steel pipe and other reinforcing steel bars into a pile model, and adding concrete below a set depth for stirring and vibrating;
(3) after the vibration is finished, inserting the steel sheet into a specific steel pipe, and installing the finished spring dynamometer combination device; and after the installation and fixation are finished, pouring concrete above the pile body and stirring to finish the pile body.
Because the position of spring dynamometer composite set installation is higher, whole work progress is after the installation of main part stake is accomplished, can guarantee like this that the bulk strength of stake can not influenced.
(4) Transporting the piles to a construction site, assembling according to a set label sequence, (the steel sheet adopts a mode that the lower opening is not sealed, the upper opening is sealed by a black adhesive tape, and the steel sheet is prevented from sliding out), firstly removing the adhesive tape of the upper opening of the pile to be combined according to a design label, welding and combining the steel sheets of the upper pile and the lower pile to be combined, then winding and sealing a specific steel bar pipe by the black adhesive tape (preventing cement from entering and influencing the work of the steel sheet), finally aligning and inserting reserved holes of the upper pile and the lower pile and reserved steel bars, determining that the whole is on the same vertical axis according to the design, and pouring concrete to combine the upper pile and the lower pile;
(5) splicing all parts of the precast pile according to preset marks in sequence according to the steps;
(6) after splicing is completed, the pile body is embedded in a construction position dug in advance, the steel sheet is drawn out from a reserved opening above, and because the steel sheet of the whole pile body is uniformly drawn out, a spring dynamometer in the pile body pushes a steel bar to probe a soil body, so that the side pressure given by the soil body received by the pile body can be obtained and is transmitted to the ground through a sensor;
(7) the monitoring center can monitor whether the working state of the pile body achieves the expected effect or not in real time through remote control, if the abnormal data is found, the problem of pile body breakage can occur, and the data should be processed in time, so that the problem in the construction process or the later use process is prevented.
Piles need to be buried in an danger zone, but whether the piles provide required stress cannot be determined, the precast piles can be monitored and repaired in time, and the safety factor of a foundation pit is greatly improved; compared with the traditional method for measuring the pile body stress, the method has the advantages that the measuring depth can be greatly deepened by arranging the sensor inside, and the installation is convenient without the guidance of technicians on workers; the problems of breakage and the like of the pile body can be analyzed in advance through data so as to prevent engineering disasters.
Although the present disclosure has been described with reference to specific embodiments, it should be understood that the scope of the present disclosure is not limited thereto, and those skilled in the art will appreciate that various modifications and changes can be made without departing from the spirit and scope of the present disclosure.
Claims (10)
1. The utility model provides a highway soft soil foundation prefabricated friction type stake which characterized in that includes: the pile body, dynamometer and spacing pipe connected with the pile body; spacing intraductal being used for placing spacing piece, the dynamometer passes and makes the force measuring point be in the region of awaiting measuring behind the spacing pipe, realizes carrying on spacingly or opening the dynamometer through adjusting spacing piece position.
2. A pre-fabricated friction type pile as claimed in claim 1, characterised in that the pile body is further connected to a sensor, the sensor being connected to a load cell.
3. The prefabricated friction type pile of claim 2, wherein the pile body is provided with a groove on one side for mounting a load cell and a sensor; one end of the groove is vertically provided with a through hole, and a limiting pipe is arranged in the through hole.
4. A pre-fabricated friction-type pile as claimed in claim 2, wherein the load cell is a spring load cell, one end of the spring load cell is connected to the sensor, the other end is connected to one end of the steel rod, the other end of the steel rod is a free end, and the free end of the steel rod can be limited or located in the working area by a limiting piece.
5. The prefabricated friction type pile of claim 1, wherein the pile body comprises an upper pile body and a lower pile body, and a load cell, a sensor and a limit pipe are connected to each of the upper pile body and the lower pile body.
6. The prefabricated friction type pile as claimed in claim 5, wherein the upper pile body is provided with a steel bar at a contact portion, and the lower pile body is provided with a groove engaged with the steel bar; the limiting pipe of the upper pile body can be superposed with the limiting pipe of the lower pile body; the limiting sheet of the upper pile body can also coincide with the limiting sheet of the lower pile body.
7. A pre-fabricated friction-type pile as defined in claim 1, wherein the sensor is connected at one end to an inner pipe, and a steel rod and a spring force gauge are installed in the inner pipe.
8. A method of manufacturing a pre-fabricated friction pile for a soft soil foundation on a road according to any one of claims 1 to 7, comprising:
putting the prefabricated specific reinforcing steel pipe and other reinforcing steel bars into a model of the pile body, and adding concrete below a set depth for stirring and vibrating;
after the vibration is finished, assembling the dynamometer and the sensor, placing the dynamometer and the sensor in a model of the pile body, inserting the steel sheet into a specific steel pipe, and installing the spring dynamometer combination device; and pouring concrete above the pile body and stirring to form the prefabricated friction type pile.
9. A method of determining the operational condition of a pre-fabricated friction-type pile for a soft soil foundation on a road according to any one of claims 1 to 7, comprising the steps of:
conveying the formed prefabricated friction type pile to a construction site for assembling and splicing;
the steel sheet is drawn out from the reserved opening at the upper part, the spring dynamometer in the pile body pushes the steel bar to probe the soil body, the lateral pressure given by the soil body received by the pile body can be obtained, and the lateral pressure is transmitted to a ground monitoring center through the sensor, so that whether the working state of the pile body achieves the expected effect or not is monitored in real time.
10. A method of determining the operational condition of a pre-fabricated friction-type pile according to claim 9, wherein said step of transporting the shaped pre-fabricated friction-type pile to a construction site for assembly and splicing includes,
transporting the piles to a construction site, assembling according to a set label sequence, removing adhesive tapes at the upper openings of the piles to be combined according to a design label, and welding and combining steel sheets of the upper piles and the lower piles to be combined;
then winding and sealing the specific steel pipe by using a black adhesive tape;
finally, aligning and inserting the reserved holes of the upper pile and the lower pile with the reserved steel bars, determining that the whole is on the same vertical axis according to the design, and pouring concrete to combine the upper pile and the lower pile;
and sequentially splicing all parts of the precast pile according to preset marks according to the steps.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011222104.9A CN112281819B (en) | 2020-11-05 | 2020-11-05 | Highway soft soil foundation prefabricated friction type pile and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011222104.9A CN112281819B (en) | 2020-11-05 | 2020-11-05 | Highway soft soil foundation prefabricated friction type pile and method |
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| Publication Number | Publication Date |
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| CN112281819A true CN112281819A (en) | 2021-01-29 |
| CN112281819B CN112281819B (en) | 2022-07-15 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202011222104.9A Active CN112281819B (en) | 2020-11-05 | 2020-11-05 | Highway soft soil foundation prefabricated friction type pile and method |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101851915A (en) * | 2010-06-13 | 2010-10-06 | 万凌志 | Force measurement pipe pile |
| CN202730804U (en) * | 2012-06-08 | 2013-02-13 | 交通运输部公路科学研究所 | Compressometer |
| CN207419447U (en) * | 2017-10-31 | 2018-05-29 | 西南石油大学 | Soil pressure cell fixing device after a kind of bored concrete pile |
| CN109487784A (en) * | 2018-10-15 | 2019-03-19 | 沈阳建筑大学 | A kind of civil engineering built pile |
| CN209040117U (en) * | 2018-10-16 | 2019-06-28 | 山东科技大学 | The prefabricated sliceable anti-corrosion steel sleeve soil compaction of one kind pierces stake |
-
2020
- 2020-11-05 CN CN202011222104.9A patent/CN112281819B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101851915A (en) * | 2010-06-13 | 2010-10-06 | 万凌志 | Force measurement pipe pile |
| CN202730804U (en) * | 2012-06-08 | 2013-02-13 | 交通运输部公路科学研究所 | Compressometer |
| CN207419447U (en) * | 2017-10-31 | 2018-05-29 | 西南石油大学 | Soil pressure cell fixing device after a kind of bored concrete pile |
| CN109487784A (en) * | 2018-10-15 | 2019-03-19 | 沈阳建筑大学 | A kind of civil engineering built pile |
| CN209040117U (en) * | 2018-10-16 | 2019-06-28 | 山东科技大学 | The prefabricated sliceable anti-corrosion steel sleeve soil compaction of one kind pierces stake |
Non-Patent Citations (2)
| Title |
|---|
| 夏才初等: "《地下工程测试理论与监测技术》", 31 August 1999, 同济大学出版社 * |
| 王永洪等: "黏性土中单桩灌入桩-土界面超孔压和土压测试现场试验", 《岩土工程学报》 * |
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| CN112281819B (en) | 2022-07-15 |
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