CN113216174A - Combined MJS pile machine and construction method thereof - Google Patents
Combined MJS pile machine and construction method thereof Download PDFInfo
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- CN113216174A CN113216174A CN202110425590.2A CN202110425590A CN113216174A CN 113216174 A CN113216174 A CN 113216174A CN 202110425590 A CN202110425590 A CN 202110425590A CN 113216174 A CN113216174 A CN 113216174A
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- mjs
- drill rod
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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
- E02D7/00—Methods or apparatus for placing sheet pile bulkheads, piles, mouldpipes, or other moulds
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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
- E02D5/34—Concrete or concrete-like piles cast in position ; Apparatus for making same
- E02D5/46—Concrete or concrete-like piles cast in position ; Apparatus for making same making in situ by forcing bonding agents into gravel fillings or the soil
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- Structural Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
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- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Earth Drilling (AREA)
Abstract
The invention discloses a combined MJS pile driver and a construction method thereof, wherein the MJS pile driver comprises a three-axis frame, a guide frame, a winch, an MJS power head, an MJS drill rod and an MJS host; the three-axis frame is obtained by removing a drill rod of the three-axis mixer, the MJS drill rod and the MJS power head are connected and then installed on the guide frame, the guide frame is installed on the three-axis frame through an installation frame, and the three-axis frame is also provided with a winch, an operation platform and an MJS host; the MJS host is in communication connection with an operating platform of the three-axis mixer. Compared with the prior art, the construction method is a micro-disturbance grouting construction technology, can quickly penetrate through underground complex geology, avoids the influence of hole collapse and the like on drilling, has high construction efficiency, saves the construction period, has the advantages of the conventional MJS construction method, has small influence on peripheral buildings and structures, has strong controllability, and can effectively ensure the safety of the peripheral buildings and municipal facilities.
Description
Technical Field
The invention belongs to the technical field of constructional engineering, and particularly relates to a combined MJS pile machine and a construction method thereof.
Background
In the urban construction process, the underground space develops towards ultra-deep and ultra-large directions, the water stopping of the enclosure structure is more and more important, and high-pressure jet grouting piles or compaction grouting are generally adopted to stop water at joints; however, when the surrounding environment of a construction area is complex and a sensitive area with high grouting pressure control requirement needs to adopt a micro-disturbance control technology, the MJS construction method pile has a better effect as a waterproof curtain. The MJS is influenced by the height of the equipment, so that the number of sections is too large, generally 2.5m, in the construction process, the construction efficiency is influenced by frequent lengthening, and the cost is higher. In order to solve the problems, the invention provides a combined MJS pile machine structure and a construction method thereof, which improve the assembly speed of a drill rod of a drilling machine and enhance the construction efficiency.
Disclosure of Invention
The invention aims to provide a combined MJS pile driver and a construction method thereof.
The purpose of the invention can be realized by the following technical scheme:
a combined MJS pile driver comprises a three-shaft frame, a guide frame, a winch, an MJS power head, an MJS drill rod and an MJS host;
the three-axis frame is obtained by removing a drill rod of the three-axis mixer, the MJS drill rod and the MJS power head are connected and then installed on the guide frame, the guide frame is installed on the three-axis frame through an installation frame, and the three-axis frame is also provided with a winch, an operation platform and an MJS host;
the power head is provided with a drill bit which is in communication connection with the underground pressure monitoring display;
the winch is used for controlling the lifting and lowering of the guide frame;
the MJS host is in communication connection with an operating platform of the three-axis mixer.
The construction method of the combined MJS pile driver comprises the following steps:
firstly, assembling a combined MJS pile driver, and then debugging equipment;
marking the position of the MJS to obtain coordinates, and guiding holes by adopting a geological drilling machine;
thirdly, after the hole leading of the geological drilling machine is finished, the combined MJS pile driver is immediately shifted to a pile forming position, a drill rod is vertically aligned to the center of the hole, and the stability and the verticality of the pile driver are guaranteed in the process;
fourthly, splicing the first section of drill rod on the guide frame for about 35m in advance, splicing the rest drill rods into 9m sections on the ground, connecting the drill bit and the underground pressure monitoring display after the combined MJS pile driver is in place, and resetting under the condition that the drill bit is free of load; the drill rod is placed, after the first section is placed, the second section is rapidly installed on the guide frame according to the lengthened section of 9m, and the drill rod is placed to the designed and designated position within 20 minutes;
fifthly, setting each process parameter after the drill bit reaches the preset depth;
sixthly, opening a backflow gas and a backflow high-pressure pump, opening a mud discharge valve after confirming that the mud discharge is normal, starting a high-pressure cement slurry pump and a main air compressor, and starting the slurry spraying and lifting after reaching the specified pressure and confirming that the underground pressure is normal;
and seventhly, spraying grout to the designed pile top elevation to finish pile forming.
As a further scheme of the invention, the assembling method of the combined MJS pile driver in the first step is as follows: the method comprises the steps of dismantling a drill rod of the three-axis mixer, dismantling the drill rod and a power head of the MJS machine, installing the drill rod and the power head of the MJS machine on a guide frame of the three-axis mixer, synchronously connecting a host of the MJS machine to a control platform of the three-axis mixing pile machine, and lengthening the MJS drill rod in advance.
As a further aspect of the invention, in the second step, a circulating slurry is used to protect the walls during the perforation.
As a further scheme of the invention, in the second step, the coordinates are marked by lime or red flags.
As a further scheme of the invention, the process parameters comprise a swing angle, a lifting speed and a revolution number, cement slurry pressure, cement slurry flow, an underground pressure, a back suction pressure, main air pressure, pile-forming angle error, a lifting speed, background slurry proportion and the like;
as a further aspect of the present invention, the lifting speed of the guniting in the sixth step is 25 min/m.
The invention has the beneficial effects that:
compared with the prior art, the construction method is a micro-disturbance grouting construction technology, can quickly penetrate through underground complex geology, avoids the influence of hole collapse and the like on drilling, has high construction efficiency, saves the construction period, has the advantages of the conventional MJS construction method, has small influence on peripheral buildings and structures, has strong controllability, and can effectively ensure the safety of the peripheral buildings and municipal facilities.
Drawings
The invention is described in further detail below with reference to the figures and specific embodiments.
Fig. 1 is a schematic structural diagram of a combined MJS pile driver according to the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
A combined MJS pile driver is shown in figure 1, and comprises a three-axis frame 1, a guide frame 6, a winch 2, an MJS power head 3, an MJS drill rod 5 and an MJS host machine 9;
the three-axis frame 1 is obtained by removing a drill rod of a three-axis mixer, a drill rod 5 and a power head 3 of the MJS machine are connected and then installed on a guide frame 6, the guide frame 6 is installed on the three-axis frame 1 through an installation frame 7, and a winch 2, an operation platform 4 and an MJS host machine 9 are further installed on the three-axis frame 1;
a drill bit 10 is arranged on the power head 3, and the drill bit 10 is in communication connection with an underground pressure monitoring display;
the winch 2 is used for controlling the lifting and lowering of the guide frame 6;
the MJS host 9 is in communication connection with the operating platform 4 of the three-axis mixer;
the construction method of the combined MJS pile driver comprises the following steps:
firstly, removing a drill rod of a three-axis mixer, removing the drill rod 5 and a power head 3 of the MJS machine, then installing the drill rod and the power head on a guide frame 6 of the three-axis mixer, synchronously connecting a host machine 9 of the MJS machine to a control platform 4 of the three-axis mixing pile machine, lengthening the MJS drill rod 5 in advance, and then completing equipment debugging;
marking the position of the MJS to obtain a coordinate 8, guiding holes by using a geological drilling machine, and protecting walls by using circulating slurry;
marking the coordinate 8 by lime or red flag;
thirdly, after the hole leading of the geological drilling machine is finished, the combined MJS pile driver is immediately shifted to a pile forming position, the drill rod 5 is vertically aligned to the center of the hole, and the stability and the verticality of the pile driver are ensured in the process;
fourthly, splicing the first section of drill rod 5 on the guide frame 6 for about 35m in advance, splicing the rest drill rods 5 into 9m sections on the ground, connecting the drill bit 10 and the underground pressure monitoring display after the combined MJS pile driver is in place, and resetting under the condition that the drill bit is free of load; and (3) starting to lower the drill rod 5, after the first section is lowered, quickly installing the second section on the guide frame 6 according to the lengthened section of 9m, and lowering the drill rod 5 to the designed and appointed position within 20 minutes.
Fifthly, setting various process parameters including a swing angle, a lifting speed and a revolution number after the drill 10 reaches a preset depth;
the technological parameters include cement slurry pressure, cement slurry flow, underground pressure, back suction pressure, main air pressure, pile-forming angle error, lifting speed, background slurry proportion and the like;
sixthly, opening a return gas and a return high-pressure pump, opening a mud discharge valve after confirming that the mud discharge is normal, starting a high-pressure cement slurry pump and a main air compressor, and starting the slurry spraying and lifting after reaching the specified pressure and confirming that the underground pressure is normal, wherein the lifting speed is 25 min/m;
and seventhly, after the slurry is sprayed to the designed pile top elevation, the pile is formed, and the lower drill rod 5 is detached and washed and maintained in time.
The foregoing is merely exemplary and illustrative of the present invention and various modifications, additions and substitutions may be made by those skilled in the art to the specific embodiments described without departing from the scope of the invention as defined in the following claims.
Claims (7)
1. A combined MJS pile driver is characterized by comprising a three-shaft frame (1), a guide frame (6), a winch (2), an MJS power head (3), an MJS drill rod (5) and an MJS host (9);
the three-axis machine frame (1) is obtained by removing a drill rod of a three-axis mixer, the MJS drill rod (5) and the MJS power head (3) are connected and then are installed on a guide frame (6), the guide frame (6) is installed on the three-axis machine frame (1) through an installation frame (7), and a winch (2), an operation platform (4) and an MJS host machine (9) are further installed on the three-axis machine frame (1);
a drill bit (10) is installed on the power head (3), and the drill bit (10) is in communication connection with the underground pressure monitoring display;
the winch (2) is used for controlling the lifting and lowering of the guide frame (6);
the MJS host (9) is in communication connection with an operation platform (4) of the three-axis mixer.
2. The construction method of the combined MJS pile machine as recited in claim 1, comprising the steps of:
firstly, assembling a combined MJS pile driver, and then debugging equipment;
marking the position of the MJS to obtain a coordinate (8), and guiding holes by adopting a geological drilling machine;
thirdly, after the hole leading of the geological drilling machine is finished, the combined MJS pile machine is immediately shifted to a pile forming position, a drill rod (5) is vertically aligned to the center of the hole, and the stability and the verticality of the pile machine are ensured in the process;
fourthly, splicing the first section of drill rod (5) on the guide frame (6) for 35m in advance, splicing the rest drill rods (5) into 9m sections on the ground, connecting the drill bit (10) and the underground pressure monitoring display after the combined MJS pile driver is in place, and resetting under the condition that the drill bit (10) has no load; the drill rod (5) begins to be lowered, after the first section is lowered, the drill rod (5) which is connected into a section of 9m is quickly installed on the guide frame (6), and the drill rod (5) is lowered to a designed and designated position within 20 minutes;
fifthly, setting each process parameter after the drill bit (10) reaches the preset depth;
sixthly, opening a backflow gas and a backflow high-pressure pump, opening a mud discharge valve after confirming that the mud discharge is normal, starting a high-pressure cement slurry pump and a main air compressor, and starting the slurry spraying and lifting after reaching the specified pressure and confirming that the underground pressure is normal;
and seventhly, spraying grout to the designed pile top elevation to finish pile forming.
3. The construction method of the combined MJS pile driver as claimed in claim 2, wherein the method of assembling the combined MJS pile driver in the first step is: the method comprises the steps of dismantling a drill rod of the three-axis mixer, dismantling the drill rod (5) and a power head (3) of the MJS machine and then installing the drill rod and the power head on a guide frame (6) of the three-axis mixer, synchronously connecting a host (9) of the MJS machine to a control platform (4) of the three-axis mixing pile machine, and lengthening the MJS drill rod (5) in advance.
4. The construction method of the combined MJS pile machine as claimed in claim 2, wherein the second step is to use a circulating mud dado in the hole-guiding.
5. The construction method of the combined MJS pile machine as claimed in claim 2, wherein the coordinates (8) in the second step are marked with lime or red flags.
6. The construction method of the combined MJS pile machine as recited in claim 2, wherein the process parameters include swing angle, lifting speed and number of turns, cement slurry pressure, cement slurry flow rate, underground pressure, suck-back water pressure, main air pressure, pile-forming angle error, lifting speed and background slurry proportion.
7. The construction method of the combined MJS pile machine as claimed in claim 2, wherein the lifting speed of the guniting in the sixth step is 25 min/m.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110425590.2A CN113216174A (en) | 2021-04-20 | 2021-04-20 | Combined MJS pile machine and construction method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110425590.2A CN113216174A (en) | 2021-04-20 | 2021-04-20 | Combined MJS pile machine and construction method thereof |
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| Publication Number | Publication Date |
|---|---|
| CN113216174A true CN113216174A (en) | 2021-08-06 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202110425590.2A Pending CN113216174A (en) | 2021-04-20 | 2021-04-20 | Combined MJS pile machine and construction method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114086544A (en) * | 2021-11-29 | 2022-02-25 | 上海隧道工程有限公司 | Ultra-deep MJS construction device and construction method thereof |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2543770A1 (en) * | 2011-07-06 | 2013-01-09 | GuD Geotechnik und Dynamik GmbH | Method and device for measuring nozzle beams underground |
| CN103074892A (en) * | 2013-01-17 | 2013-05-01 | 上海城地建设股份有限公司 | Two-shaft, four-shaft and six-shaft interchanging type cement and soil stirring pile device and construction method thereof |
| CN109322623A (en) * | 2018-10-19 | 2019-02-12 | 广州市第二建筑工程有限公司 | A kind of pile machine equipment and construction method of major diameter rotary churning pile |
| CN110185035A (en) * | 2019-05-31 | 2019-08-30 | 武汉江钻恒立工程钻具股份有限公司 | A kind of pile making method of the MJS engineering method suitable for hardpan |
-
2021
- 2021-04-20 CN CN202110425590.2A patent/CN113216174A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2543770A1 (en) * | 2011-07-06 | 2013-01-09 | GuD Geotechnik und Dynamik GmbH | Method and device for measuring nozzle beams underground |
| CN103074892A (en) * | 2013-01-17 | 2013-05-01 | 上海城地建设股份有限公司 | Two-shaft, four-shaft and six-shaft interchanging type cement and soil stirring pile device and construction method thereof |
| CN109322623A (en) * | 2018-10-19 | 2019-02-12 | 广州市第二建筑工程有限公司 | A kind of pile machine equipment and construction method of major diameter rotary churning pile |
| CN110185035A (en) * | 2019-05-31 | 2019-08-30 | 武汉江钻恒立工程钻具股份有限公司 | A kind of pile making method of the MJS engineering method suitable for hardpan |
Non-Patent Citations (1)
| Title |
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| 孙克钦: "《浅析MJS工法桩施工质量控制要点》", 《城市道桥与防洪》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114086544A (en) * | 2021-11-29 | 2022-02-25 | 上海隧道工程有限公司 | Ultra-deep MJS construction device and construction method thereof |
| CN114086544B (en) * | 2021-11-29 | 2022-12-20 | 上海隧道工程有限公司 | Ultra-deep MJS construction device and construction method thereof |
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Application publication date: 20210806 |
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