CN111794218A - Construction quality control device for solidified soil pile and construction method thereof - Google Patents
Construction quality control device for solidified soil pile and construction method thereof Download PDFInfo
- Publication number
- CN111794218A CN111794218A CN202010564208.1A CN202010564208A CN111794218A CN 111794218 A CN111794218 A CN 111794218A CN 202010564208 A CN202010564208 A CN 202010564208A CN 111794218 A CN111794218 A CN 111794218A
- Authority
- CN
- China
- Prior art keywords
- pile
- solidified soil
- soil
- construction
- casing
- 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
Images
Classifications
-
- 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
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D33/00—Testing foundations or foundation structures
Landscapes
- Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Piles And Underground Anchors (AREA)
Abstract
The invention discloses a construction quality control device and a construction method of a solidified soil pile.A drill rod and a pile casing of a mixing pile machine or a rotary spraying pile machine automatically adjust the lifting speed of the drill rod, the stirring or rotary spraying speed and the slurry spraying amount in real time under the control of a variable frequency control device according to different soil layer information, the temperature of solidified soil and the pressure condition of the inner wall of the pile casing, and fully and uniformly mix an in-situ soil body in the pile casing with a curing agent to form the solidified soil pile in a foundation. The construction parameters are automatically optimized through the variable frequency control device, and the pile forming quality of the solidified soil pile is ensured. The mixing uniformity of the upper part of the pile body and the lower part solidified soil can be effectively ensured in a complex stratum, the pile body strength and the quality of the solidified soil pile can be effectively controlled, and the quality detection is convenient. The resources are utilized on site, and the method is environment-friendly without residue soil; construction parameters are monitored in the whole process and are optimized in an automatic frequency conversion mode, man-machine interaction is strong, construction quality is guaranteed, and convenience is greatly improved.
Description
Technical Field
The invention belongs to the technical field of foundation treatment and deep foundation pit support, and particularly relates to a construction quality control device for a solidified soil pile and a construction method thereof.
Background
Mixing cement or lime curing agent into the soft foundation to cure the soft foundation into cured soil with certain strength, which is one of important methods for foundation treatment and deep foundation pit support; the main construction processes include a deep stirring method, a high-pressure jetting method and a grouting method. The most common form at present is that the solidified soil forms a columnar pile body form (such as a cement mixing pile and a high-pressure jet grouting pile) in the foundation, and the pile body form is used as a composite foundation to bear the upper load. However, the existing cement mixing pile or high-pressure jet grouting pile generally has the problems of insufficient and uneven vertical mixing or injection, so that the pile body strength of the solidified soil is low and uneven, and the actual strength value of part of the solidified soil is only about 0.3MPa and is far lower than the design value of 3-4 MPa; the mechanical guniting capacity of the existing cement mixing pile is 0.6-0.8 MPa, and the mechanical guniting capacity of part of cement mixing piles is weak and is only 0.5 MPa. The upper part and the lower part of a soil layer of a traditional cement mixing pile or a high-pressure rotary jet pile have the same jet pressure in the construction process, the lower part soil layer has limited influence range of guniting due to large constraint, and the upper part soil layer has small constraint, so that grout is discharged and wasted and influences the environment; in addition, the drilling speed is slow in hard soil layers, the guniting amount is large, the drilling speed is fast in soft soil layers, the guniting amount is small on the contrary, the requirement for foundation reinforcement is not met, and the problems that the pile body is not uniformly stirred and the strength difference is large are caused.
Aiming at the problems of low strength of pile body solidified soil and uneven stirring of a curing agent and a soil body, a pile forming operation method of a pile casing type cement-soil mixing pile (patent No. ZL201611014698.8) discloses a method for arranging a casing in a foundation soil layer and constructing a traditional cement mixing pile in the casing to ensure that cement grout is mixed with the soil body in the casing, improve the uniformity and strength of the pile body solidified soil and avoid the diffusion and the passing of the curing agent grout; the method saves cement slurry materials and improves the pile body strength, but the problem of uneven mixing between the traditional cement mixing pile construction process and the soil body in the upper soil layer and the lower soil layer is not effectively overcome. An adaptive monitoring system for construction quality of a mixing pile based on the technology of the internet of things (application number: 201810827324.0) discloses a construction method which is characterized in that a sensor and the adaptive monitoring system are additionally arranged on a pile machine of a cement mixing pile, construction parameters are corrected in real time through a computer, and the grouting quantity is controlled to meet design requirements; the amount of the grout needed by curing different soil layers is one of the most important links of soil body curing construction, however, the method only uses the soil layer distribution in the geological survey report as the construction basis, and the soil layer distribution condition at the actual piling position may be different from the geological survey report. Aiming at the hidden property of the construction of the solidified soil pile and the uncertainty of the soil layer distribution, a stiff composite pile intelligent construction system (patent number: ZL201710095673.3) discloses a method for setting a static force contact probe and an earth taking device on a drill rod or a drill bit of a cement mixing pile, grasping soil layer information and pile forming conditions in time by analyzing a static force contact probe result, an earth taking result and motor current and intelligently adjusting construction parameters of rotating speed and guniting pressure by a cloud platform; however, the static touch probe is positioned at the lower end of the drill rod and is close to the grout spraying opening, so that the static touch probe is easily wrapped by grout to influence the measurement accuracy of the static touch probe, and the pile body strength is influenced to a certain extent.
Disclosure of Invention
The invention provides a method for mixing a curing agent with a soil body, which solves the technical problems of low strength of the pile body cured soil and uneven mixing of the curing agent and the soil body.
In order to solve the technical problems, the technical scheme adopted by the invention is as follows: a construction method of a solidified soil pile construction quality control device comprises the following steps:
s1, leveling the tee joint, measuring and lofting, moving the pile frame of the pile machine to a specified position, centering and installing a pile casing;
s2, starting the pile driver, and cutting and drilling the pile casing under the action of the power head; the static sounding measurement analyzer wirelessly receives measurement data of a static sounding probe at the bottom of a pile casing and wirelessly transmits the measurement data to a control module of a variable frequency control host;
s3, the control module sends an instruction to a power head of the pile driver, and the drill rod and the pile casing sink under the action of the power head; during construction, the variable frequency control host sends an adjusting instruction to the power head and the flow controller according to soil layer change, the detection conditions of the section pressure and the section temperature of the solidified soil pile, and automatically adjusts the sinking speed, the stirring or rotary spraying speed and the guniting quantity of the drill rod in real time so as to meet the construction requirements of the corresponding soil layer;
s4, the frequency conversion control host machine judges whether repeated guniting or stirring sinking is needed to reach a corresponding depth according to data read by the pressure sensor and the temperature sensor on the inner wall of the pile casing, if so, the step S3 is returned, and if not, the drill rod is lifted to a preset grout stopping surface until solidified soil with uniform mixing and high strength is formed;
and S5, before the solidified soil is initially set, pulling out the pile casing, and closing the pile machine to finish the construction of a solidified soil pile.
Further, in step S3, monitoring the pressure uniformity of the solidified soil pile cross section: when the guniting quantity meets the design requirement, an analysis module of the variable frequency control host calculates theoretical pressure increment according to the inner diameter of the pile casing, the guniting quantity and the slurry density, when the ratio of the theoretical pressure increment to the pressure difference read by the pressure sensor on the inner wall of the pile casing is larger than 1.2-1.5, the analysis module judges that the solidified soil pile is too small in local section, the control module sends an instruction to a power head and a flow controller of the pile machine, and the sinking speed, the stirring or rotary spraying speed and the guniting quantity of the drill rod are automatically adjusted until the corresponding requirement is met.
And further, after the drill rod sinks to the corresponding depth, closing the power head, and continuously mixing for 1-2 min.
Further, in the step S3, monitoring the temperature uniformity of the solidified soil pile cross section: the temperature of the solidified soil is raised due to heat release of cement hydration, the monitoring module and the analysis module of the variable frequency control host read and analyze the distribution condition of radial temperature according to the temperature sensor on the inner wall of the casing, when the maximum temperature difference at the same depth is greater than the design requirement, the analysis module judges that the cement slurry in the solidified soil is not uniformly distributed, the control module sends an instruction to the power head, and the lifting speed and the stirring or rotary spraying speed of the drill rod are automatically adjusted to meet the corresponding requirement until the drill rod is lifted to a preset slurry stop surface.
Further, in the step S4, the compressive strength of the solidified soil is 5-6 MPa. The function of ensuring that the bearing capacity meets the requirement is achieved.
Further, the pile machine is a mixing pile machine or a jet grouting pile machine.
Furthermore, the solidified soil is obtained by fully mixing the in-situ soil in the pile casing and a curing agent in a stirring or spraying device, and 5-10% of sand and stones are mixed when the soil is stirred or sprayed to the mucky soil or the soft clay layer.
A construction quality control device for a solidified soil pile comprises a pile machine, wherein the pile machine comprises a pile frame, a power head, a drill rod, a drill bit, a stirring blade, a curing agent storage device and a pile casing, the drill rod is connected with the curing agent storage device through a curing agent conveying pipe, the bottom of the pile casing is provided with a static touch probe, and the inner wall of the pile casing is provided with a temperature sensor and a pressure sensor; a flow controller and a density sensor are arranged on the curing agent conveying pipe; the variable frequency control host is used for sending an adjusting instruction to the power head and the flow controller and automatically adjusting the sinking or lifting speed, the stirring or rotary spraying speed and the guniting amount of the drill rod in real time; the variable frequency management cloud platform is used for checking and controlling the variable frequency control host; the variable frequency control host is wirelessly connected with the static sounding measurement analyzer and the sensor data recorder; the static sounding measurement analyzer is used for wirelessly receiving measurement data of the static sounding head, and the sensor data recorder is used for wirelessly receiving the measurement data of each sensor.
Further, the frequency conversion control host comprises a monitoring module, an analysis module and a control module; the monitoring module monitors different soil layer information, the temperature of solidified soil and the pressure condition of the inner wall of the pile casing; the analysis module is used for analyzing the working data of the pile machine and the pile casing according to the monitoring condition; and the control module is used for receiving the analysis data of the analysis module and controlling the sinking or pulling speed, the stirring or rotary spraying speed and the guniting amount of the drill rod according to the analysis data.
Furthermore, the frequency conversion management cloud platform is information management software, is used for monitoring and recording construction parameters, progress and change of a site in real time, and can remotely check and control frequency conversion construction conditions in real time. The platform is used for real-time cooperation, cost reduction and efficiency improvement are achieved, and the construction quality of the solidified soil pile is improved.
Preferably, the reinforced body is further arranged in the solidified soil pile according to design requirements, the reinforced body is made of geogrid, geotextile, reinforcement cage or steel wire mesh, and the concrete operation method for arranging the reinforced body in the solidified soil pile comprises the following steps:
(1) and attaching the reinforcement body to the inner wall of the pile casing and penetrating into the drill hole along with the pile casing.
(2) When the protective cylinder is pulled out, the reinforcement body is separated from the protective cylinder and is left in the drill hole, and the arrangement of the reinforcement body is completed.
Furthermore, a heat exchange pipe is arranged in the solidified soil pile according to design requirements to form energy pile construction based on the solidified soil pile, and the specific operation method comprises the following steps:
(1) and heat exchange tubes are bound on the inner wall of the reinforcement body.
(2) And (3) attaching the reinforcement body with the heat exchange tube on the inner wall of the pile casing and penetrating into the drill hole along with the pile casing.
(3) When the protective cylinder is pulled out, the reinforced body with the heat exchange tube is separated from the protective cylinder and is left in the drill hole, and the arrangement of the heat exchange tube is completed.
In addition, coring detection needs to be carried out on the solidified soil pile, and pile forming quality is detected, and the concrete operation method comprises the following steps:
(1) and drilling and coring at any position of the top surface of the solidified soil pile within 24 hours after the construction of the solidified soil pile is completed.
(2) And detecting the strength of the core sample, and calculating the strength of the pile in the age of 28 days according to a formula to finish pile quality detection.
The invention achieves the following beneficial effects: under the control of a variable frequency control device, a drill rod and a pile casing of a mixing pile machine or a rotary spraying pile machine automatically adjust the lifting speed of the drill rod, the mixing or rotary spraying speed and the slurry spraying amount in real time according to different soil layer information, the temperature of solidified soil and the pressure condition of the inner wall of the pile casing, fully and uniformly mix an in-situ soil body in the pile casing with a curing agent, and form a solidified soil pile in a foundation. The construction parameters are automatically optimized through the variable frequency control device, and the pile forming quality of the solidified soil pile is ensured. The mixing uniformity of the upper part of the pile body and the lower part solidified soil can be effectively ensured in a complex stratum, the pile body strength and the quality of the solidified soil pile can be effectively controlled, and the quality detection is convenient. The resources are utilized on site, and the method is environment-friendly without residue soil; construction parameters are monitored in the whole process and are optimized in an automatic frequency conversion mode, man-machine interaction is strong, construction quality is guaranteed, and convenience is greatly improved.
Drawings
FIG. 1 is a schematic diagram of the apparatus of the present invention;
FIG. 2 is a schematic view of a pod of the present invention;
fig. 3 is a flow chart of the operation of the variable frequency control system of the present invention.
In the figure: 1-pile machine; 2-pile frame; 3, a power head; 4-a drill pipe; 5-protecting the cylinder; 6-a drill bit; 7-stirring blades; 8-a curing agent delivery pipe; 9-a flow controller; 10-a density sensor; 11-a curing agent reservoir; 12-a static touch probe; 13-a temperature sensor; 14-a pressure sensor; 15-static cone penetration measurement analyzer; 16-sensor data recorder; 17-a variable frequency control host; 18-a variable frequency management cloud platform; 19-a monitoring module; 20-an analysis module; 21-control module.
Detailed Description
The invention is further described below. The following examples are only for illustrating the technical solutions of the present invention more clearly, and the protection scope of the present invention is not limited thereby.
As shown in fig. 1 to 3, a construction quality control device for a solidified soil pile comprises a pile machine 1, wherein the pile machine 1 comprises a pile frame 2, a power head 3, a drill rod 4, a drill bit 6, a stirring blade 7, a curing agent storage 11 and a pile casing 5, which are the prior art. The drill rod 4 is connected with a curing agent storage 11 through a curing agent conveying pipe 8. The bottom of the pile casing 5 is provided with a static contact probe 12, and the inner wall of the pile casing 5 is provided with a temperature sensor 13 and a pressure sensor 14; a flow controller 9 and a density sensor 10 are arranged on the curing agent conveying pipe 8; the system further comprises a frequency conversion control host 17 and a frequency conversion management cloud platform 18.
In the embodiment, 2-4 rows of temperature sensors 13 and pressure sensors 14 which are long in the depth direction are uniformly arranged on the inner wall of the pile casing 5. The curing agent storage 11 stores a curing agent which is cement, lime or geopolymer material.
And the frequency conversion control host 17 is used for sending an adjusting instruction to the power head 3 and the flow controller 9 and automatically adjusting the drill rod 4 in real time. The frequency conversion management cloud platform 18 is used for checking and controlling the frequency conversion control host 17. The variable frequency control host 17 is wirelessly connected with the static sounding measurement analyzer 15 and the sensor data recorder 16. The static cone penetration measurement analyzer 15 is used for wirelessly receiving measurement data of the static cone penetration head 12; the sensor data recorder 16 is used for wirelessly receiving the measurement data of each sensor.
The frequency conversion control host 17 comprises a monitoring module 19, an analysis module 20 and a control module 21. The monitoring module 19 is used for monitoring different soil layer information and pressure and temperature conditions of solidified soil; the analysis module 20 is used for analyzing the working data of the pile machine 1 and the pile casing 5 according to the monitoring condition; the control module 21 receives the analysis data of the analysis module 20 and controls the sinking speed, the stirring or rotary spraying speed and the guniting amount of the drill rod 4 according to the analysis data.
In this embodiment, the frequency conversion management cloud platform 18 is information management software for frequency conversion control of construction quality of the solidified soil pile, and is used for monitoring and recording construction parameters, progress and changes of a site in real time, so that a constructor can remotely check and control frequency conversion construction conditions in real time. The owner, each of the construction and supervision parties can utilize the platform to perform real-time cooperation, cost reduction and efficiency improvement are realized, and the construction quality of the solidified soil pile is improved.
Examples 1,
The embodiment provides a construction method of a solidified soil pile construction quality control device, which comprises the following steps:
step one, tee joint leveling, measurement lofting, and positioning of the pile machine 1, the curing agent 12, the variable-frequency control host 17 and the variable-frequency management cloud platform 18. Pile frame 2 is moved to a designated position and centered, and pile casing 5 is installed. In this embodiment, the pile machine 1 is a cement mixing pile machine.
And step two, starting the cement mixing pile machine, cutting and drilling the pile casing 5 under the action of the power head 3, wirelessly receiving measurement data of a static contact probe 12 at the bottom of the pile casing 5 by a static sounding measurement analyzer 15, judging soil layer properties by the static contact measurement analyzer 15 in combination with a ground survey report, and wirelessly transmitting the measurement data to a control module 21 of a variable frequency control host 17 by the static contact measurement analyzer 15.
And step three, the control module 21 sends an instruction to the power head 3 of the pile driver 1, and the drill rod 4 and the pile casing 5 sink under the action of the power head 3. During construction, the variable frequency control host 17 sends an adjusting instruction to the power head 3 and the flow controller 9 according to the change of soil layers, and automatically adjusts the sinking speed, the stirring speed and the guniting amount of the drill rod 4 in real time so as to meet the construction requirements of corresponding soil layers.
And step four, monitoring the pressure uniformity of the section of the solidified soil pile, calculating a theoretical pressure increase amount by an analysis module 20 of the variable frequency control host 17 according to the inner diameter of the pile casing 5, the slurry spraying amount and the slurry density after the slurry spraying amount meets the design requirement, judging that the solidified soil pile is too small in local section by the analysis module 20 when the ratio of the theoretical pressure increase amount to the pressure difference read by the pile casing inner wall pressure sensor 14 is more than 1.2-1.5, sending an instruction to the power head 3 and the flow controller 9 by the control module 21, and automatically adjusting the sinking speed, the stirring speed and the slurry spraying amount of the drill rod 4 until the corresponding requirement is met. And after the drill rod 4 is stirred and sunk to the corresponding depth, closing the power head 3 and continuously stirring for 1 minute.
Monitoring the temperature uniformity of the section of the solidified soil pile, reading and analyzing the radial temperature distribution condition by a monitoring module 19 and an analysis module 20 of a frequency conversion control host 17 according to a temperature sensor 13 on the inner wall of a casing 5, when the maximum temperature difference at the same depth is larger than the design requirement, judging that the cement slurry in the solidified soil is not uniformly distributed by the analysis module 20, sending an instruction to a power head 3 by a control module 21, and automatically adjusting the lifting speed and the stirring speed of a drill rod 4 to meet the corresponding requirements until the drill rod 4 is lifted to a preset slurry stop surface.
And step five, judging whether repeated guniting is needed or only stirring sinking is needed to reach a corresponding depth according to the mixing uniformity degree of the solidified soil pile read by the pressure sensor 14 and the temperature sensor 13 on the inner wall of the pile casing 5 by the frequency conversion control host 17, and lifting the drill rod to a preset grout stopping surface if not needed until the solidified soil with good uniformity and high strength is formed. In the embodiment, the compressive strength of the solidified soil reaches 5MPa, and the bearing capacity is ensured to meet the requirement.
And step six, before the initial setting of the solidified soil, pulling out the pile casing 5, closing the cement mixing pile machine, completing the construction of one solidified soil pile, and moving to the next pile.
The construction process can be remotely checked and controlled in real time through the variable-frequency management cloud platform 18.
Examples 2,
The embodiment provides a construction method of a solidified soil pile construction quality control device, which comprises the following steps:
step one, tee joint leveling, measurement lofting, and positioning of the pile machine 1, the curing agent 12, the variable-frequency control host 17 and the variable-frequency management cloud platform 18. Pile frame 2 is moved to a designated position and centered, and pile casing 5 is installed. In this embodiment, the pile machine 1 is a jet grouting pile machine.
And step two, starting the jet grouting pile driver, cutting and drilling the pile casing 5 under the action of the power head 3, wirelessly receiving measurement data of a static sounding probe 12 at the bottom of the pile casing 5 by a static sounding measurement analyzer 15, judging soil layer properties by the static sounding measurement analyzer 15 in combination with a ground survey report, and wirelessly transmitting the measurement data to a control module 21 of a variable frequency control host 17 by the static sounding measurement analyzer 15.
And step three, the control module 21 sends an instruction to the power head 3 of the pile driver 1, and the drill rod 4 and the pile casing 5 sink under the action of the power head 3. During construction, the variable frequency control host 17 sends an adjusting instruction to the power head 3 and the flow controller 9 according to the change of soil layers, and automatically adjusts the sinking speed, the rotary spraying speed and the guniting quantity of the drill rod 4 in real time so as to meet the construction requirements of corresponding soil layers.
And step four, monitoring the pressure uniformity of the section of the solidified soil pile, calculating a theoretical pressure increase amount by an analysis module 20 of the variable frequency control host 17 according to the inner diameter of the pile casing 5, the slurry spraying amount and the slurry density after the slurry spraying amount meets the design requirement, judging that the solidified soil pile is too small in local section by the analysis module 20 when the ratio of the theoretical pressure increase amount to the pressure difference read by the pile casing inner wall pressure sensor 14 is more than 1.2-1.5, sending an instruction to the power head 3 and the flow controller 9 by the control module 21, and automatically adjusting the sinking speed, the rotary spraying speed and the slurry spraying amount of the drill rod 4 until corresponding requirements are met. And after the drill rod 4 is stirred and sunk to the corresponding depth, closing the power head 3 and continuously stirring for 2 minutes.
The temperature uniformity of the section of the solidified soil pile is monitored, the temperature of the solidified soil is raised due to heat release of cement hydration, the monitoring module 19 and the analysis module 20 of the variable frequency control host 17 read and analyze the distribution condition of radial temperature according to the temperature sensor 13 on the inner wall of the pile casing 5, when the maximum temperature difference at the same depth is larger than the design requirement, the analysis module 20 judges that cement slurry in the solidified soil is not uniformly distributed, the control module 21 sends an instruction to the power head 3, and the lifting speed and the rotary spraying speed of the drill rod 4 are automatically adjusted to meet the corresponding requirements until the drill rod 4 is lifted to a preset slurry stop surface.
And step five, judging whether the drilling rod needs to be repeatedly sprayed or stirred to sink to a corresponding depth according to the mixing uniformity of the solidified soil pile read by the pressure sensor 14 and the temperature sensor 13 on the inner wall of the pile casing 5 by the frequency conversion control host 17, and lifting the drilling rod to a preset slurry stopping surface if the drilling rod does not need to be lifted until uniform solidified soil is formed. In the embodiment, the compressive strength of the solidified soil reaches 6MPa, and the bearing capacity is ensured to meet the requirement.
And step six, before the initial setting of the solidified soil, pulling out the pile casing 5, closing the jet grouting pile machine, completing the construction of one solidified soil pile, and moving to the next pile.
The construction process can be remotely checked and controlled in real time through the variable-frequency management cloud platform 18.
Examples 3,
Step one, tee joint leveling, measurement lofting, and positioning of the pile machine 1, the curing agent 12, the variable-frequency control host 17 and the variable-frequency management cloud platform 18. Pile frame 2 is moved to a designated position and centered, and pile casing 5 is installed.
And step two, starting the pile driver, cutting and drilling the pile casing 5 under the action of the power head 3, wirelessly receiving measurement data of a static sounding probe 12 at the bottom of the pile casing 5 by a static sounding measurement analyzer 15, judging soil layer properties by the static sounding measurement analyzer 15 in combination with a ground survey report, and wirelessly transmitting the measurement data to a control module 21 of a variable frequency control host 17 by the static sounding measurement analyzer 15.
And step three, the control module 21 sends an instruction to the power head 3 of the pile driver 1, and the drill rod 4 and the pile casing 5 sink under the action of the power head 3. During construction, the variable frequency control host 17 sends an adjusting instruction to the power head 3 and the flow controller 9 according to the change of soil layers, and automatically adjusts the sinking speed, the stirring or rotary spraying speed and the slurry spraying amount of the drill rod 4 in real time so as to meet the construction requirements of corresponding soil layers.
And step four, monitoring the pressure uniformity of the section of the solidified soil pile, calculating a theoretical pressure increase amount by an analysis module 20 of the variable frequency control host 17 according to the inner diameter of the pile casing 5, the slurry spraying amount and the slurry density after the slurry spraying amount meets the design requirement, judging that the solidified soil pile is too small in local section by the analysis module 20 when the ratio of the theoretical pressure increase amount to the pressure difference read by the pile casing inner wall pressure sensor 14 is more than 1.2-1.5, sending an instruction to the power head 3 and the flow controller 9 by the control module 21, and automatically adjusting the sinking speed, the stirring or rotary spraying speed and the slurry spraying amount of the drill rod 4 until the corresponding requirement is met. And after the drill rod 4 is stirred and sunk to the corresponding depth, closing the power head 3 and continuously stirring for 1 minute.
Monitoring the temperature uniformity of the section of the solidified soil pile, reading and analyzing the radial temperature distribution condition by a monitoring module 19 and an analysis module 20 of a frequency conversion control host 17 according to a temperature sensor 13 on the inner wall of a pile casing 5, when the maximum temperature difference at the same depth is larger than the design requirement, judging that the cement slurry in the solidified soil is not uniformly distributed by the analysis module 20, sending an instruction to a power head 3 by a control module 21, and automatically adjusting the lifting speed and the stirring or rotary spraying speed of a drill rod 4 to meet the corresponding requirement until the drill rod 4 is lifted to a preset slurry stop surface.
And step five, judging whether repeated guniting or stirring sinking is needed to reach a corresponding depth according to the mixing uniformity degree of the solidified soil pile read by the pressure sensor 14 and the temperature sensor 13 on the inner wall of the pile casing 5 by the frequency conversion control host 17, and lifting the drill rod to a preset grout stopping surface if not needed until uniform solidified soil is formed. In the embodiment, the compressive strength of the solidified soil reaches 5-6 MPa, and the bearing capacity is ensured to meet the requirement.
The solidified soil is obtained by fully mixing in-situ soil in the pile casing and a curing agent in a stirring or spraying device, and when the solidified soil is stirred or sprayed to mucky soil or a soft clay layer, 5-10% of gravel or crushed construction waste is mixed.
And step six, before the initial setting of the solidified soil, pulling out the pile casing 5, closing the pile machine 1, completing the construction of one solidified soil pile, and shifting to the next pile.
The construction process can be remotely checked and controlled in real time through the variable-frequency management cloud platform 18.
Particularly, a reinforcement body is further arranged in the solidified soil pile according to design requirements, the reinforcement body is made of geogrid, geotextile, a reinforcement cage or a steel wire mesh, and the concrete operation method for arranging the reinforcement body in the solidified soil pile comprises the following steps:
(1) and attaching the reinforcement body to the inner wall of the pile casing and penetrating into the drill hole along with the pile casing.
(2) When the protective cylinder 5 is pulled out, the reinforcing rib body is separated from the protective cylinder 5 and is left in the drill hole, and the arrangement of the reinforcing rib body is completed.
Furthermore, heat exchange pipes are arranged in the solidified soil piles according to design requirements, and energy pile construction based on the solidified soil piles is formed.
The specific operation method comprises the following steps:
(1) and heat exchange tubes are bound on the inner wall of the reinforcement body.
(2) And (3) attaching a reinforcement body with a heat exchange tube on the inner wall of the casing 5 and penetrating into the drill hole along with the casing 5.
(3) When the protective cylinder 5 is pulled out, the reinforcement body with the heat exchange tube is separated from the protective cylinder 5 and is left in the drill hole, and the arrangement of the heat exchange tube is completed.
In addition, coring detection needs to be carried out on the solidified soil pile, and pile forming quality is detected. The specific operation method comprises the following steps:
(1) and drilling and coring at any position of the top surface of the solidified soil pile within 24 hours after the construction of the solidified soil pile is completed.
(2) And detecting the strength of the core sample, and calculating the strength of the pile in the age of 28 days according to a formula to finish pile quality detection.
The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, several modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the protection scope of the present invention.
Claims (10)
1. A construction method of a solidified soil pile construction quality control device is characterized by comprising the following steps:
s1, leveling the tee joint, measuring and lofting, moving the pile frame of the pile machine to a specified position, centering and installing a pile casing;
s2, starting the pile driver, and cutting and drilling the pile casing under the action of the power head; the static sounding measurement analyzer wirelessly receives measurement data of a static sounding probe at the bottom of a pile casing and wirelessly transmits the measurement data to a control module of a variable frequency control host;
s3, the control module sends an instruction to a power head of the pile driver, and the drill rod and the pile casing sink under the action of the power head; during construction, the variable frequency control host sends an adjusting instruction to the power head and the flow controller according to soil layer change, the detection conditions of the section pressure and the section temperature of the solidified soil pile, and automatically adjusts the sinking speed, the stirring or rotary spraying speed and the guniting quantity of the drill rod in real time so as to meet the construction requirements of the corresponding soil layer;
s4, the frequency conversion control host machine judges whether repeated guniting or stirring sinking is needed to reach a corresponding depth according to data read by the pressure sensor and the temperature sensor on the inner wall of the pile casing, if so, the step S3 is returned, and if not, the drill rod is lifted to a preset grout stopping surface until solidified soil with uniform mixing and high strength is formed;
and S5, before the solidified soil is initially set, pulling out the pile casing, and closing the pile machine to finish the construction of a solidified soil pile.
2. The method of claim 1, wherein in step S3, the pressure uniformity of the solidified soil pile cross section is monitored by: when the guniting quantity meets the design requirement, an analysis module of the variable frequency control host calculates theoretical pressure increment according to the inner diameter of the pile casing, the guniting quantity and the slurry density, when the ratio of the theoretical pressure increment to the pressure difference read by the pressure sensor on the inner wall of the pile casing is larger than 1.2-1.5, the analysis module judges that the solidified soil pile is too small in local section, the control module sends an instruction to a power head and a flow controller of the pile machine, and the sinking speed, the stirring or rotary spraying speed and the guniting quantity of the drill rod are automatically adjusted until the corresponding requirement is met.
3. The construction method of the device for controlling the construction quality of the solidified soil pile according to claim 2, wherein after the drill rod is sunk to a corresponding depth, the power head is closed, and the mixing is continued for 1-2 min.
4. The method of claim 1, wherein in step S3, the temperature uniformity of the solidified soil pile cross section is monitored by: the temperature of the solidified soil is raised due to heat release of cement hydration, the monitoring module and the analysis module of the variable frequency control host read and analyze the distribution condition of radial temperature according to the temperature sensor on the inner wall of the casing, when the maximum temperature difference at the same depth is greater than the design requirement, the analysis module judges that the cement slurry in the solidified soil is not uniformly distributed, the control module sends an instruction to the power head, and the lifting speed and the stirring or rotary spraying speed of the drill rod are automatically adjusted to meet the corresponding requirement until the drill rod is lifted to a preset slurry stop surface.
5. The method of claim 1, wherein in step S4, the compressive strength of the solidified soil is 5-6 MPa.
6. The device for controlling construction quality of a solidified soil pile according to claim 1, wherein the pile machine is a mixing pile machine or a jet grouting pile machine.
7. The device for controlling the construction quality of the solidified soil pile as claimed in claim 1, wherein the solidified soil is obtained by fully mixing in-situ soil in the pile casing with a curing agent in a stirring or spraying device, and 5-10% of sand and stones are mixed when the solidified soil is stirred or sprayed to mucky soil or soft clay layers.
8. A construction quality control device for a solidified soil pile comprises a pile machine, wherein the pile machine comprises a pile frame, a power head, a drill rod, a drill bit, a stirring blade, a curing agent storage device and a pile casing, the drill rod is connected with the curing agent storage device through a curing agent conveying pipe, and the construction quality control device is characterized in that a static touch probe is arranged at the bottom of the pile casing, and a temperature sensor and a pressure sensor are arranged on the inner wall of the pile casing; a flow controller and a density sensor are arranged on the curing agent conveying pipe; the variable frequency control host is used for sending an adjusting instruction to the power head and the flow controller and automatically adjusting the sinking or lifting speed, the stirring or rotary spraying speed and the guniting amount of the drill rod in real time; the variable frequency management cloud platform is used for checking and controlling the variable frequency control host; the variable frequency control host is wirelessly connected with the static sounding measurement analyzer and the sensor data recorder; the static sounding measurement analyzer is used for wirelessly receiving measurement data of the static sounding head, and the sensor data recorder is used for wirelessly receiving the measurement data of each sensor.
9. The device for controlling construction quality of the solidified soil pile as claimed in claim 8, wherein the variable frequency control host comprises a monitoring module, an analysis module and a control module;
the monitoring module monitors different soil layer information, the temperature of solidified soil and the pressure condition of the inner wall of the pile casing;
the analysis module is used for analyzing the working data of the pile machine and the pile casing according to the monitoring condition;
and the control module is used for receiving the analysis data of the analysis module and controlling the sinking or pulling speed, the stirring or rotary spraying speed and the guniting amount of the drill rod according to the analysis data.
10. The device for controlling the construction quality of the solidified soil pile as claimed in claim 8, wherein the variable frequency management cloud platform is information management software for monitoring and recording construction parameters, progress and change of a site in real time, and remotely checking and controlling the variable frequency construction condition in real time.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010564208.1A CN111794218A (en) | 2020-06-19 | 2020-06-19 | Construction quality control device for solidified soil pile and construction method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010564208.1A CN111794218A (en) | 2020-06-19 | 2020-06-19 | Construction quality control device for solidified soil pile and construction method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111794218A true CN111794218A (en) | 2020-10-20 |
Family
ID=72803545
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010564208.1A Pending CN111794218A (en) | 2020-06-19 | 2020-06-19 | Construction quality control device for solidified soil pile and construction method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111794218A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112553992A (en) * | 2020-12-01 | 2021-03-26 | 谭晓雷 | Roadbed earth-stone square reinforcing method for highway engineering |
| CN112627175A (en) * | 2020-12-18 | 2021-04-09 | 中铁第五勘察设计院集团有限公司 | Cement mixing pile construction system and method |
| CN114753361A (en) * | 2022-04-29 | 2022-07-15 | 深圳市交通公用设施建设中心 | Pile foundation steel casing capable of controlling stratum deformation and construction method thereof |
| CN116658068A (en) * | 2023-06-06 | 2023-08-29 | 江苏省送变电有限公司 | High-pressure rotary jet drilling machine adaptive to stratum and construction method thereof |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101831909A (en) * | 2010-05-11 | 2010-09-15 | 河海大学 | Cement mixing pile construction slurry flow real-time control device |
| CN106368214A (en) * | 2016-11-17 | 2017-02-01 | 安徽理工大学 | Pile forming operation method for protection barrel type cement soil mixing pile |
| CN106869119A (en) * | 2017-02-22 | 2017-06-20 | 沙焕焕 | Stiff composite pile intelligence construction system |
| CN110453679A (en) * | 2019-08-20 | 2019-11-15 | 宁波科探基础工程有限公司 | A kind of cement mixing pile monitoring system |
| AU2017416947A1 (en) * | 2017-06-01 | 2019-12-19 | Hebei Research Institute Of Construction And Geotechnical Investigation Co. Ltd. | Cast-in-place geopolymer pile with heating system |
-
2020
- 2020-06-19 CN CN202010564208.1A patent/CN111794218A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101831909A (en) * | 2010-05-11 | 2010-09-15 | 河海大学 | Cement mixing pile construction slurry flow real-time control device |
| CN106368214A (en) * | 2016-11-17 | 2017-02-01 | 安徽理工大学 | Pile forming operation method for protection barrel type cement soil mixing pile |
| CN106869119A (en) * | 2017-02-22 | 2017-06-20 | 沙焕焕 | Stiff composite pile intelligence construction system |
| AU2017416947A1 (en) * | 2017-06-01 | 2019-12-19 | Hebei Research Institute Of Construction And Geotechnical Investigation Co. Ltd. | Cast-in-place geopolymer pile with heating system |
| CN110453679A (en) * | 2019-08-20 | 2019-11-15 | 宁波科探基础工程有限公司 | A kind of cement mixing pile monitoring system |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112553992A (en) * | 2020-12-01 | 2021-03-26 | 谭晓雷 | Roadbed earth-stone square reinforcing method for highway engineering |
| CN112553992B (en) * | 2020-12-01 | 2022-04-05 | 谭晓雷 | Roadbed earth-stone square reinforcing method for highway engineering |
| CN112627175A (en) * | 2020-12-18 | 2021-04-09 | 中铁第五勘察设计院集团有限公司 | Cement mixing pile construction system and method |
| CN114753361A (en) * | 2022-04-29 | 2022-07-15 | 深圳市交通公用设施建设中心 | Pile foundation steel casing capable of controlling stratum deformation and construction method thereof |
| CN114753361B (en) * | 2022-04-29 | 2024-04-30 | 深圳市交通公用设施建设中心 | Pile foundation steel pile casing capable of controlling stratum deformation and construction method thereof |
| CN116658068A (en) * | 2023-06-06 | 2023-08-29 | 江苏省送变电有限公司 | High-pressure rotary jet drilling machine adaptive to stratum and construction method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN111794218A (en) | Construction quality control device for solidified soil pile and construction method thereof | |
| CN109371974A (en) | A kind of PHC tubular pole implantation construction method suitable for hard geology | |
| CN106917409A (en) | A kind of rock lid weight consolidation grouting construction method | |
| CN107653889B (en) | Construction method of section steel pressure-grouting cement soil curtain support pile | |
| CN107299633A (en) | A kind of utilization High-pressure Spiral Spray Technology improves the construction method of the bearing capacity of stake | |
| CN106812149A (en) | A kind of construction method of pile foundation | |
| CN112195924A (en) | Method for reinforcing foundation pit base of silt silty clay layer | |
| CN102296588B (en) | Construction process of underwater sand compaction pile | |
| CN108005682A (en) | A kind of shield tunnel reinforcement means | |
| CN111395348B (en) | Method for controlling upward floating of existing tunnel striding on foundation pit by adopting hydraulic servo system | |
| CN107587502B (en) | Construction method for rotary drilling hole-forming pressure-grouting cement soil occlusion curtain pile | |
| CN102966088B (en) | Discontinuous combined pile for reinforcing hard soil interlayer-containing soft soil foundation and construction method of discontinuous combined pile | |
| CN104329020A (en) | Reinforced long-screw rock-socketed construction equipment and process thereof | |
| Chen et al. | Element nail pullout tests for prediction of soil nail pullout resistance in expansive clays | |
| CN112144514A (en) | Simple method for forming hole and pile in sand and pebble stratum easy to collapse during rotary drilling machine | |
| CN216239904U (en) | Existing building underpins and consolidates connection structure | |
| CN107829422B (en) | Method for nondestructively identifying terrace diseases and rapidly repairing terrace diseases in micro-damage mode | |
| CN114059527A (en) | Large-diameter mixing pile construction method suitable for high-groundwater-level hard soil layer | |
| CN111502672B (en) | Construction method for stratum reinforcement before opening of shield cutter head | |
| CN103806444A (en) | Soft soil layer rotary excavating pile construction method | |
| CN106759296A (en) | Drainable irregular-section bamboo joint pipe pile and root planting type construction method thereof | |
| CN113174991B (en) | Pile periphery stratum collapse grouting reinforcement method for ocean deepwater inclined piles | |
| CN113931236A (en) | Construction process for shaping and seepage prevention of garbage mountain | |
| CN113174992A (en) | Comprehensive treatment and reinforcement method for collapse of stratum around marine deep-water inclined pile | |
| CN204530683U (en) | A kind of pile making device ramming expansion CFG stake for spiral pore-forming |
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 |
Application publication date: 20201020 |
|
| RJ01 | Rejection of invention patent application after publication |