阅读说明：本技术 一种pc工法桩围堰监测装置及安装监测方法 (Monitoring device and installation monitoring method for pile cofferdam in PC construction method ) 是由 秦尚进 杨世涛 陈雨 黄伟 袁艳涛 孙岩龙 高昌伦 白虎祥 李纪涛 王宜豪 王清 于 2021-08-30 设计创作，主要内容包括：本发明公开了一种PC工法桩围堰监测装置,由箍环、橡胶垫、荧光贴、锁死把手、高强螺栓、沉降钉、拉杆、固定支架、倾斜监测盘组成。箍环、橡胶垫、荧光贴、锁死把手、固定支架、倾斜监测盘为一体结构,锁死把手设有高强螺栓,箍环中部设有拉杆；倾斜监测盘由上监测盘、下支撑盘、调节螺帽、升降螺杆组成,上监测盘内部设有凹槽、水准气泡、环形刻度线。本发明同时提供了一种安装监测方法,由八个步骤组成,本发明结构及方法简单、监测精度高,弥补了PC工法桩围堰倾斜监测技术空白,极具推广价值。(The invention discloses a monitoring device for a pile cofferdam in a PC construction method, which consists of a hoop, a rubber pad, a fluorescent sticker, a locking handle, a high-strength bolt, a settlement nail, a pull rod, a fixed support and an inclination monitoring disc. The hoop, the rubber pad, the fluorescent sticker, the locking handle, the fixed support and the inclination monitoring disc are integrated into a whole, the locking handle is provided with a high-strength bolt, and the middle of the hoop is provided with a pull rod; the slope monitoring disc comprises last monitoring disc, lower supporting disk, adjusting nut, lifting screw, goes up inside recess, level bubble, the annular scale mark of being equipped with of monitoring disc. The invention also provides an installation monitoring method, which consists of eight steps, has simple structure and method and high monitoring precision, makes up for the blank of the cofferdam inclination monitoring technology of the pile under the PC construction method, and has great popularization value.)

1. The utility model provides a monitoring devices in PC worker method stake cofferdam, by hoop (1), rubber pad (2), fluorescence paste (3), lock dead handle (4), high strength bolt (5), subside nail (6), pull rod (7), fixed bolster (8), slope monitoring disk (9) and constitute its characterized in that: the hoop (1), the rubber pad (2), the fluorescent sticker (3), the locking handle (4), the fixed support (8) and the inclination monitoring disc (9) are of an integrated structure; the locking handle (4) is provided with 4 high-strength bolt holes (10) which correspond to each other in pairs, and the high-strength bolts (5) penetrate through the high-strength bolt holes (10) to restrain the locking handle (4); the surface of the hoop (1) is provided with a fluorescent sticker (3), the middle of the hoop (1) is provided with 2 corresponding pull rod holes (11), and the pull rod (7) can restrict the hoop (1) through the pull rod holes (11); the pull rod (7) consists of a counter-pull screw rod (701), a gasket (702) and a pull rod nut (703), a circular groove (12) is formed in the middle of the pull rod (7), and a settling nail (6) can be installed and fixed in the circular groove (12); the inclination monitoring disc (9) consists of an upper monitoring disc (901), a lower supporting disc (902), an adjusting nut (903) and a lifting screw (904), and the upper monitoring disc (901) is connected with the lower supporting disc (902) through the lifting screw (904); go up monitoring dish (901) central point and put and be equipped with recess (9001), recess (9001) inside is equipped with level bubble (9002), and recess (9001) bottom is equipped with annular scale mark (9003).

2. The cofferdam monitoring device for piles in PC construction method according to claim 1, wherein the inner diameter of the rubber pad (2) is consistent with the outer diameter of the steel pipe pile used in the field.

3. The monitoring device for the pile cofferdam in the PC construction method according to claim 1, wherein the hoop (1), the locking handle (4), the sedimentation nail (6), the pull rod (7), the fixing support (8), the upper monitoring disc (901), the lower supporting disc (902) and the lifting screw (903) are all made of stainless steel.

4. The cofferdam monitoring device for piles under PC construction method as claimed in claim 1, wherein said upper monitoring plate (901) and lower supporting plate (902) are identical in size and are all in the shape of equilateral triangle with side length of 20cm and thickness of 3 cm.

5. The cofferdam monitoring device for the piles in the PC construction method according to claim 1, wherein the groove (9001) is of a cylindrical structure with a closed upper part, the diameter is 10cm, the depth is 2cm, the bottom of the groove (9001) is provided with 7 layers of annular scale marks (9003) from inside to outside, the centers of the annular scale marks (9003) are the centers of the groove (9001), and the vertical distance between adjacent annular scale marks (9003) is 1 cm.

6. The method for installing and monitoring the pile cofferdam in the PC construction method according to the claims 1-5, which is characterized by comprising the following technical steps:

the method comprises the following steps: selection of monitoring points

Arranging monitoring points at intervals of 10-15 m along the length direction of the cofferdam, wherein relatively weak positions such as the corners of the cofferdam need to be arranged in an encrypted manner;

step two: cleaning of steel pipe pile surface layer

The device is arranged at the top of the steel pipe pile of the pile cofferdam in the PC construction method, after the position of a monitoring point is determined, the top of the steel pipe pile needs to be derusted before the monitoring device is arranged, and the derusting of the steel pipe pile can be carried out by sand blasting;

step three: positioning of monitoring devices

After the surface layer of the steel pipe pile is cleaned, positioning a monitoring device, sleeving a hoop (1) at a position which is 5-10 cm away from a top opening plane outside the steel pipe pile, continuously adjusting the position of the hoop (1), enabling a leveling bubble (9002) to be located in a second layer of annular scale mark (9003) area and be close to the center as far as possible, and marking the position of the hoop (1) and the position of a pull rod hole (11) on the steel pipe pile by chalk at the moment;

step four: drilling of draw bar hole

After the positions of the hoop (1) and the pull rod hole (11) are marked, taking down the hoop (1) sleeved at the top of the steel pipe pile, drilling at the marked position of the pull rod hole (11) by using an electric drill, wherein the diameter of the drilled hole is matched with that of the counter-pull screw (701);

step five: mounting of monitoring devices

Uniformly coating a layer of epoxy resin glue on the inner surface of a rubber pad (2), installing a hoop (1) at the position of the hoop (1) marked in the third step, enabling a pull rod hole (11) in the hoop (1) to correspond to a hole in a steel pipe pile, screwing down a high-strength bolt (5) on a locking handle (4), enabling a monitoring device to be firmly nested at the top of the steel pipe pile, then enabling a counter-pull screw (701) to penetrate through the pull rod hole (11), adopting a pull rod nut (703) and a gasket (702) to restrain, realizing secondary fixing of the monitoring device, and finally uniformly coating a layer of epoxy resin glue at the bottom of a settlement nail (6), inserting the epoxy resin glue into a circular groove (12) in the middle of a pull rod (7), and completing installation work of the monitoring device;

step six: leveling of monitoring devices

After the monitoring device is installed, the monitoring device is accurately leveled, and the height of the lifting screw rod (904) is controlled by adjusting three adjusting screw caps (903) so that the leveling bubble (9002) is positioned at the most central position of 7 layers of annular scale marks (9003);

step seven: inspection and protection of monitoring devices

After the monitoring device is installed, the fixing support (8) is shaken, whether the fixing of the hoop (1) is firm or not and whether the leveling bubble (9002) moves or not are observed, if the situation that the fixing is not firm and the leveling bubble (9002) moves is found, the locking handle (4) and the pull rod (7) are further reinforced after re-leveling is needed until the monitoring device is installed stably, and after the installation, a warning device needs to be placed in the range of 1m of the monitoring device, so that the monitoring device is prevented from being damaged in the field construction process;

step eight: acquisition and processing of monitoring data

Monitoring the pile level and settlement in the PC construction method: the horizontal and vertical displacement of the settlement nail (6) can be monitored by adopting other monitoring instruments such as an RTK measuring instrument and the like;

monitoring the inclination of the pile in the PC construction method: observing the position of the leveling bubble (9002) to judge the inclination condition of the pile in the PC construction method, and establishing different early warning levels represented by 7 layers of annular scale lines (9003) according to different practical engineering conditions; if the field inclination deformation condition exceeds the range of 7 layers of annular scale marks (9003), leveling the device again after recording the current monitoring data, and calculating and collecting the inclination monitoring data by adopting an accumulative method;

when the early warning condition appears in the monitoring data of the levelness, the settlement and the inclination of the pile cofferdam in the PC construction method, the construction is immediately stopped, and appropriate measures are adopted to eliminate potential safety hazards.

Technical Field

The invention belongs to the field of cofferdam deformation monitoring, and particularly relates to a cofferdam monitoring device and an installation monitoring method for piles in a PC construction method.

Background

The cofferdam is a temporary maintenance structure constructed for building some hydraulic engineering facilities on rivers and lakes, the pile cofferdam structure of the PC construction method is a novel cofferdam structure appearing in recent years, the pile cofferdam of the PC construction method consists of Larsen steel sheet piles and steel pipe piles, and the pile cofferdam of the PC construction method has the advantages of good waterproof effect, strong stability, convenience in construction, recyclability and the like, and is widely applied to various support fields.

The safety and stability of the cofferdam is the key for guaranteeing whether hydraulic engineering can be smoothly carried out, but the technology of the existing deformation monitoring aspect of the cofferdam as a novel high-efficiency supporting structure is not perfect, and the monitoring efficiency and the monitoring precision are reduced when the traditional monitoring technology is applied to the cofferdam of the pile in the PC construction method, so that the safety construction of the engineering is greatly influenced. Therefore, a novel cofferdam monitoring device and method for piles in a PC construction method are needed to meet the requirement of modern safe construction.

Disclosure of Invention

The utility model provides a monitoring devices in PC worker method stake cofferdam, by hoop, rubber pad, fluorescence subsides, lock dead handle, high strength bolt, subside nail, pull rod, fixed bolster, slope monitoring dish and constitute its characterized in that: the hoop, the rubber pad, the fluorescent sticker, the locking handle, the fixed bracket and the inclination monitoring disc are of an integrated structure; the locking handle is provided with 4 high-strength bolt holes corresponding to each other in pairs, and the high-strength bolts penetrate through the high-strength bolt holes to restrain the locking handle; the surface of the hoop is provided with a fluorescent sticker, the middle part of the hoop is provided with 2 corresponding pull rod holes, and the pull rod can restrain the hoop through the pull rod holes; the pull rod consists of a counter-pull screw rod, a gasket and a pull rod nut, a circular groove is formed in the middle of the pull rod, and a fixed settlement nail can be installed in the circular groove; the inclination monitoring disc consists of an upper monitoring disc, a lower supporting disc, an adjusting nut and a lifting screw rod, and the upper monitoring disc is connected with the lower supporting disc through the lifting screw rod; go up monitoring dish central point and put and be equipped with the recess, the inside level bubble that is equipped with of recess, the recess bottom is equipped with annular scale mark.

Preferably, the inner diameter of the rubber pad is consistent with the outer diameter of the steel pipe pile adopted on site.

Preferentially, the hoop, the dead handle of lock, the nail that subsides, pull rod, fixed bolster, go up monitoring disc, lower supporting disk, lifting screw all adopt stainless steel.

Preferably, the upper monitoring disc and the lower supporting disc are identical in size and are in an equilateral triangle shape, the side length is 20cm, and the thickness is 3 cm.

Preferably, the groove is of a cylindrical structure with a closed upper part, the diameter of the groove is 10cm, the depth of the groove is 2cm, 7 layers of annular scale marks are arranged at the bottom of the groove from inside to outside, the circle centers of the annular scale marks are the centers of the grooves, and the vertical distance between the adjacent annular scale marks is 1 cm.

A method for installing and monitoring a pile cofferdam in a PC construction method comprises the following technical steps:

the method comprises the following steps: selection of monitoring points

Arranging monitoring points at intervals of 10-15 m along the length direction of the cofferdam, wherein relatively weak positions such as the corners of the cofferdam need to be arranged in an encrypted manner;

step two: cleaning of steel pipe pile surface layer

The device is arranged at the top of the steel pipe pile of the pile cofferdam in the PC construction method, after the position of a monitoring point is determined, the top of the steel pipe pile needs to be derusted before the monitoring device is arranged, and the derusting of the steel pipe pile can be carried out by sand blasting;

step three: positioning of monitoring devices

After the surface layer of the steel pipe pile is cleaned, positioning a monitoring device, sleeving a hoop on the outer portion of the steel pipe pile at a position 5-10 cm away from a top opening plane, continuously adjusting the position of the hoop to enable the leveling bubble to be located in the second layer of annular scale mark area and to be close to the center as much as possible, and marking the position of the hoop and the position of a pull rod hole on the steel pipe pile by using chalk at the moment;

step four: drilling of draw bar hole

After the positions of the hoop and the pull rod hole are marked, the hoop sleeved at the top of the steel pipe pile is taken down, drilling is carried out at the marked position of the pull rod hole by using an electric drill, and the diameter of the drilled hole is matched with that of the counter-pull screw;

step five: mounting of monitoring devices

Uniformly coating a layer of epoxy resin glue on the inner surface of the rubber pad, installing a hoop at the position of the hoop marked in the third step, enabling a pull rod hole in the hoop to correspond to a hole in the steel pipe pile, screwing a high-strength bolt tightly locked on a handle, enabling the monitoring device to be firmly nested at the top of the steel pipe pile, then enabling a counter-pull screw to penetrate through the pull rod hole, restraining by adopting a pull rod nut and a gasket, realizing secondary fixing of the monitoring device, and finally, uniformly coating a layer of epoxy resin glue at the bottom of a settlement nail and inserting the epoxy resin glue into a circular groove in the middle of a pull rod to finish the installation work of the monitoring device;

step six: leveling of monitoring devices

After the monitoring device is installed, the monitoring device is accurately leveled, and the heights of the lifting screws are controlled by adjusting three adjusting nuts, so that leveling air bubbles are positioned at the most central position of 7 layers of annular scale marks;

step seven: inspection and protection of monitoring devices

After the monitoring device is installed, the fixing support is shaken to observe whether the hoops are firmly fixed or not and whether the leveling bubbles move or not, if the situation that the fixing is not firm and the leveling bubbles move is found, the locking handle and the pull rod are further reinforced after the leveling is needed again until the monitoring device is installed stably, and after the installation is finished, a warning device needs to be placed within 1m of the monitoring device, so that the monitoring device is prevented from being damaged in the field construction process;

step eight: acquisition and processing of monitoring data

Monitoring the pile level and settlement in the PC construction method: the horizontal and vertical displacement of the settlement nail can be monitored by adopting other monitoring instruments such as an RTK measuring instrument and the like;

monitoring the inclination of the pile in the PC construction method: observing the position of the leveling bubble to judge the inclination condition of the pile in the PC construction method, and formulating different early warning levels represented by 7 layers of annular scale lines according to different practical engineering conditions; if the field inclination deformation condition exceeds the range of 7 layers of annular scale lines, the device is leveled again after the current monitoring data are recorded, and the inclination monitoring data are calculated and collected by adopting an accumulative method;

when the early warning condition appears in the monitoring data of the levelness, the settlement and the inclination of the pile cofferdam in the PC construction method, the construction is immediately stopped, and appropriate measures are adopted to eliminate potential safety hazards.

Compared with the prior art, the invention has the following beneficial effects:

(1) the arrangement of the dead locking handle, the rubber pad, the pull rod and the high-strength bolt realizes the stable connection of the monitoring device and the steel pipe pile, and effectively ensures the measurement precision in the monitoring process.

(2) Due to the arrangement of the inclination monitoring disc, the inclination condition of the pile cofferdam in the PC construction method is effectively monitored, and the defect that the inclination condition of the pile cofferdam in the PC construction method cannot be effectively monitored by the traditional monitoring method is overcome.

(3) The arrangement of the settlement nails in the middle of the pull rod solves the problem that the pile top level and settlement monitoring points are not easy to arrange in the pile cofferdam in the PC construction method, standardizes the arrangement of the monitoring points in the construction site, and meets the requirement of modern safety monitoring.

(4) The level, subside and slope monitoring integral type setting has avoided the redundancy of a lot of stationing work, has saved the cost greatly, has improved monitoring efficiency.

(5) The hoops, the locking handles, the upper monitoring disc, the lower supporting disc, the sedimentation nails, the upper monitoring disc, the lower supporting disc and the lifting screw are all made of stainless steel materials, so that the durability of the structure is greatly improved; the arrangement of the fluorescent sticker and the placement of the warning device in the step seven greatly reduce the damage of the monitoring device; the durability and the warning performance of the monitoring device effectively guarantee the continuity of field monitoring work.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a top view of the inventive structure;

FIG. 3 is a schematic view of the tilt monitoring plate of the present invention;

FIG. 4 is a schematic view of a pull rod structure according to the present invention;

FIG. 5 is a schematic view of the hoop and deadlocking handle of the present invention;

FIG. 6 is a schematic flow chart of an installation monitoring method of the present invention;

fig. 7 is a schematic view of the present invention after installation.

The device comprises a hoop 1, rubber pads 2, a fluorescent sticker 3, a locking handle 4, a high-strength bolt 5, a settlement nail 6, a pull rod 7, a split screw 701, a gasket 702, a pull rod nut 703, a fixed support 8, an inclined monitoring disc 9, an upper monitoring disc 901, a lower supporting disc 902, a lifting screw 903, an adjusting nut 904, a 9001 groove, a 9002 leveling bubble, a 9003 scale mark, a high-strength bolt hole 10, a pull rod hole 11 and a circular groove 12.

Detailed description of the invention

The invention is described in detail below with reference to the accompanying drawings:

the utility model provides a monitoring devices in PC worker method stake cofferdam, by hoop 1, rubber pad 2, fluorescence paste 3, lock dead handle 4, high strength bolt 5, subside nail 6, pull rod 7, fixed bolster 8, slope monitoring disk 9 and constitute its characterized in that: the hoop 1, the rubber pad 2, the fluorescent sticker 3, the locking handle 4, the fixed support 8 and the inclination monitoring disc 9 are of an integral structure; the locking handle 4 is provided with 4 high-strength bolt holes 10 corresponding to each other in pairs, and the high-strength bolts 5 penetrate through the high-strength bolt holes 10 to restrain the locking handle 4; the surface of the hoop 1 is provided with a fluorescent sticker 3, the middle part of the hoop 1 is provided with 2 corresponding pull rod holes 11, and the pull rod 7 can restrain the hoop 1 through the pull rod holes 11; the pull rod 7 consists of a counter-pull screw 701, a gasket 702 and a pull rod nut 703, a circular groove 12 is formed in the middle of the pull rod 7, and a fixed sedimentation nail 6 can be installed in the circular groove 12; the inclination monitoring disc 9 consists of an upper monitoring disc 901, a lower supporting disc 902, an adjusting nut 903 and a lifting screw 904, and the upper monitoring disc 901 and the lower supporting disc 902 are connected through the lifting screw 904; go up monitoring dish 901 central point and put and be equipped with recess 9001, recess 9001 is inside to be equipped with level bubble 9002, and recess 9001 bottom is equipped with annular scale mark 9003.

As shown in fig. 7, the inner diameter of the rubber mat 2 is matched with the outer diameter of the steel pipe pile used in the field.

As shown in fig. 1, 3 and 4, the hoop 1, the locking handle 4, the settling nail 6, the pull rod 7, the fixing bracket 8, the upper monitoring disc 901, the lower supporting disc 902 and the lifting screw 903 are all made of stainless steel.

As shown in fig. 3, the upper monitoring disc 901 and the lower supporting disc 902 are identical in size and are in the shape of an equilateral triangle, the side length is 20cm, and the thickness is 3 cm.

As shown in fig. 2, the groove 9001 is a cylindrical structure with a sealed upper portion, the diameter is 10cm, the depth is 2cm, 7 layers of annular scale marks 9003 are arranged at the bottom of the groove 9001 from inside to outside, the circle center of each annular scale mark 9003 is the center of the groove 9001, and the vertical distance between every two adjacent annular scale marks 9003 is 1 cm.

As shown in fig. 6 and 7, a method for installing and monitoring a cofferdam of a pile in a PC construction method comprises the following technical steps:

the method comprises the following steps: selection of monitoring points

Arranging monitoring points at intervals of 10-15 m along the length direction of the cofferdam, wherein relatively weak positions such as the corners of the cofferdam need to be arranged in an encrypted manner;

step two: cleaning of steel pipe pile surface layer

The device is arranged at the top of the steel pipe pile of the pile cofferdam in the PC construction method, after the position of a monitoring point is determined, the top of the steel pipe pile needs to be derusted before the monitoring device is arranged, and the derusting of the steel pipe pile can be carried out by sand blasting;

step three: positioning of monitoring devices

After the surface layer of the steel pipe pile is cleaned, positioning a monitoring device, sleeving a hoop 1 outside the steel pipe pile at a position 5-10 cm away from a top opening plane, and continuously adjusting the position of the hoop 1 to enable a leveling bubble 9002 to be positioned in the area of a second layer of annular scale marks 9003 and to be close to the center as much as possible, wherein the position of the hoop 1 and the position of a pull rod hole 11 are marked on the steel pipe pile by chalk;

step four: drilling of draw bar hole

After the positions of the hoop 1 and the pull rod hole 11 are marked, the hoop 1 sleeved at the top of the steel pipe pile is taken down, drilling operation is carried out at the marked position of the pull rod hole 11 by using an electric drill, and the diameter of a drilled hole is matched with the diameter of the counter-pull screw 701;

step five: mounting of monitoring devices

Uniformly coating a layer of epoxy resin glue on the inner surface of a rubber pad 2, installing a hoop 1 at the position of the hoop 1 marked in the third step, enabling a pull rod hole 11 in the hoop 1 to correspond to an eyelet on a steel pipe pile, screwing down a high-strength bolt 5 on a locking handle 4, enabling a monitoring device to be firmly nested at the top of the steel pipe pile, then enabling a counter-pull screw 701 to penetrate through the pull rod hole 11, adopting a pull rod nut 703 and a gasket 702 to restrain, and realizing secondary fixing of the monitoring device, and finally, uniformly coating a layer of epoxy resin glue at the bottom of a settlement nail 6, inserting the epoxy resin glue into a circular groove 12 in the middle of a pull rod 7, and completing the installation work of the monitoring device;

step six: leveling of monitoring devices

After the monitoring device is installed, the monitoring device is accurately leveled, and the height of the lifting screw 904 is controlled by adjusting three adjusting nuts 903, so that the leveling bubble 9002 is positioned at the most central position of the 7-layer annular scale mark 9003;

step seven: inspection and protection of monitoring devices

After the monitoring device is installed, the fixing support 8 is shaken, whether the hoop 1 is fixed firmly or not and whether the leveling bubble 9002 moves or not are observed, if the situation that the leveling bubble 9002 moves due to the fact that the fixing is not firm is found, the locking handle 4 and the pull rod 7 are further reinforced after the leveling needs to be conducted again until the monitoring device is installed stably, and after the installation is completed, a warning device needs to be placed in the range of 1m of the monitoring device, so that the monitoring device is prevented from being damaged in the field construction process;

step eight: acquisition and processing of monitoring data

Monitoring the pile level and settlement in the PC construction method: the horizontal and vertical displacement of the settlement nail 6 can be monitored by adopting other monitoring instruments such as an RTK measuring instrument and the like;

monitoring the inclination of the pile in the PC construction method: observing the position of the leveling bubble 9002 to judge the inclination condition of the pile in the PC construction method, and formulating different early warning levels represented by 7 layers of annular scale lines 9003 according to different practical engineering conditions; if the field inclination deformation condition exceeds the range of 7 layers of annular scale marks 9003, the device is leveled again after the current monitoring data are recorded, and the inclination monitoring data are calculated and collected by an accumulative method;

when the early warning condition appears in the monitoring data of the levelness, the settlement and the inclination of the pile cofferdam in the PC construction method, the construction is immediately stopped, and appropriate measures are adopted to eliminate potential safety hazards.

It is to be understood that the above description is not intended to limit the present invention, and the present invention is not limited to the above examples, and those skilled in the art may make modifications, alterations, additions or substitutions within the spirit and scope of the present invention.