CN112281867A - Deep foundation pit support based on remote force stability monitoring and construction method - Google Patents
Deep foundation pit support based on remote force stability monitoring and construction method Download PDFInfo
- Publication number
- CN112281867A CN112281867A CN202011129828.9A CN202011129828A CN112281867A CN 112281867 A CN112281867 A CN 112281867A CN 202011129828 A CN202011129828 A CN 202011129828A CN 112281867 A CN112281867 A CN 112281867A
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- support
- rod
- foundation pit
- deep foundation
- rotating shaft
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D17/00—Excavations; Bordering of excavations; Making embankments
- E02D17/02—Foundation pits
- E02D17/04—Bordering surfacing or stiffening the sides of foundation pits
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D33/00—Testing foundations or foundation structures
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D2600/00—Miscellaneous
- E02D2600/10—Miscellaneous comprising sensor means
Abstract
The invention discloses a support for a deep foundation pit based on remote force stability monitoring and a construction method, and belongs to the field of deep foundation pits, wherein two adjacent support guard plates are fixedly connected through a locking notch, four connecting cross rods are connected and fixed end to form a rectangle, a plurality of support guard plates are fixed on the outer side of each connecting cross rod, and a support guard plate which is not fixed with the connecting cross rod is arranged between the two adjacent support guard plates fixed with the connecting cross rods; the inside rotation of connecting the horizontal pole is connected with pivot detection mechanism, the pivot detection mechanism outside is provided with two conduction poles, two the middle part of conduction pole rotate connect in on the pivot detection mechanism, the one end of conduction pole articulate in support on the backplate. The deformation is amplified through the action of the conducting rod, so that the detection can be more convenient.
Description
Technical Field
The invention relates to the field of foundation pit construction, in particular to a support for a deep foundation pit based on remote force stability monitoring and a construction method.
Background
Along with the expansion of construction scales of urban subways, super high-rise buildings and the like, construction projects of deep foundation pits are more and more. In the process of deep foundation pit construction, foundation pit instability and water and mud outburst accidents occur frequently, the stress stability of the foundation pit is more and more concerned by people in the industry, and the technical regulations of foundation pit support in the industry have certain limitations when meeting special hydrogeological engineering geological conditions and dense building group environments. The method has very important practical significance in developing the remote intelligent monitoring three-dimensional early warning method for the stress stability of the deep foundation pit by considering the principle of safety and economy.
Because the soil condition of each place around the foundation ditch is different or the heavy object of stacking is different can lead to everywhere effort different, local pressure and deformation can not fine detection of current support, make local position deformation serious easily and fail in time to detect and lead to dangerous the emergence.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention aims to provide a support for a deep foundation pit based on remote force stability monitoring and a construction method, which can conveniently and accurately detect micro deformation of a local area, so that the force stability of the support can be accurately monitored.
In order to achieve the purpose, the invention adopts the following technical scheme:
the invention provides a support for a deep foundation pit based on remote force stability monitoring, which comprises a plurality of support guard plates and four connecting cross rods, wherein lock notches are formed in the edges of the support guard plates, two adjacent support guard plates are fixedly connected through the lock notches, the four connecting cross rods are fixedly connected end to form a rectangle, the support guard plates are fixed on the outer sides of the connecting cross rods, and a support guard plate which is not fixed with the connecting cross rods is arranged between the two adjacent support guard plates fixed with the connecting cross rods; connect horizontal pole inside rotation and be connected with pivot detection mechanism, the pivot detection mechanism outside is provided with two conduction poles, two the middle part of conduction pole rotate connect in on the pivot detection mechanism, the one end of conduction pole articulate in support on the backplate, so that support the deformation drive of backplate the pivot detection mechanism is rotatory or the drive the conduction pole is rotatory.
The invention preferably adopts the technical scheme that the conduction rods are connected to two sides of the same supporting guard plate or connected to two adjacent supporting guard plates.
The invention has the preferable technical scheme that the rotating shaft detection mechanism comprises a driving rotating shaft and a static torque sensor, a driving round table is arranged in the middle of the driving rotating shaft, the diameter of the driving round table is larger than that of the driving rotating shaft, a connecting lug is arranged on the outer side wall of the driving round table, and the conducting rod is rotationally connected to the connecting lug; the static torque sensor is sleeved on the driving rotating shaft to detect the acting force of the driving rotating shaft on the conducting rod.
The invention has the preferable technical scheme that a fixing sheet is arranged on the outer side wall of the driving circular truncated cone, an adjusting knob is arranged on the fixing sheet and is in threaded connection with the fixing sheet, a torsion pressure sensor is arranged on one side of the adjusting knob, which is close to the conducting rod, and the torsion pressure sensor is abutted against the other end of the conducting rod
The invention has the preferable technical scheme that the length direction of the fixing sheet is vertical to a connecting line between the circle center of the driving circular truncated cone and the circle center of the rotating shaft of the conduction rod.
The invention has the preferable technical scheme that one end of the conduction rod, which is connected with the support guard plate, is provided with a hinged joint, the hinged joint is rotatably connected with the conduction rod, and one side of the hinged joint, which is connected with the support guard plate, is provided with a mounting lug.
The invention preferably adopts the technical scheme that a plurality of mounting holes which are rotatably connected with the connecting lug pieces are formed in the conducting rod.
The invention has the preferable technical scheme that a connecting inclined rod is arranged between two adjacent connecting cross rods, one end of the connecting inclined rod is fixedly welded with the connecting cross rod, the other end of the connecting inclined rod is connected with the connecting cross rod through a screw, and a side shifting pressure sensor is arranged between one end of the connecting inclined rod provided with the screw and the supporting protective plate.
A construction method of a support for a deep foundation pit based on remote force stability monitoring comprises the following steps: step S00: determining the range of the deep foundation pit, and reserving lines at intervals of 10CM for installing supporting guard plates; step S10: the single supporting guard plates are sequentially installed and aligned with the locking notch of the previous supporting guard plate during installation; step S20: welding and fixing the connecting cross rod on the inner side of the support guard plate, then installing a connecting inclined rod at a corner, and arranging a side shifting pressure sensor between the connecting inclined rod and the connecting cross rod; step S30: a rotating shaft detection mechanism is arranged in the connecting cross rod, a conduction rod is arranged according to the position of the supporting guard plate, a proper mounting hole is selected, and then the hinge joint is fixed on the supporting guard plate; step S40: adjusting the static torque sensor to zero; step S50: and adjusting an adjusting knob of the rotating shaft detection mechanism to enable the torsion pressure sensor to be abutted against the conduction rod and to be zeroed.
The invention has the beneficial effects that:
the invention provides a support for a deep foundation pit based on remote force stability monitoring, which comprises a plurality of support guard plates and four connecting cross rods, wherein lock notches are formed in the edges of the support guard plates, two adjacent support guard plates are fixedly connected through the lock notches, the four connecting cross rods are fixedly connected end to form a rectangle, the support guard plates are fixed on the outer sides of the connecting cross rods, and a support guard plate which is not fixed with the connecting cross rods is arranged between the two adjacent support guard plates fixed with the connecting cross rods; connect horizontal pole inside rotation and be connected with pivot detection mechanism, the pivot detection mechanism outside is provided with two conduction poles, two the middle part of conduction pole rotate connect in on the pivot detection mechanism, the one end of conduction pole articulate in support on the backplate, so that support the deformation drive of backplate the pivot detection mechanism is rotatory or the drive the conduction pole is rotatory. The deformation is amplified through the action of the conducting rod, so that the detection can be more convenient.
Drawings
Fig. 1 is a schematic view of an overall structure of a support for a deep foundation pit based on remote force stability monitoring according to an embodiment of the present invention;
FIG. 2 is an enlarged schematic view of portion A of FIG. 1 provided in accordance with an embodiment of the present invention;
FIG. 3 is a schematic view of a spindle detection mechanism provided in an embodiment of the present invention;
in the figure:
1. supporting the guard plate; 2. connecting the cross bars; 3. connecting the inclined rod; 4. a rotating shaft detection mechanism; 11. locking the opening; 31. a side-shifting pressure sensor; 41. a conductive rod; 42. a static torque sensor; 43. driving the circular truncated cone; 44. connecting a lug plate; 45. a fixing sheet; 46. a torsional pressure sensor; 47. adjusting a knob; 48. driving the rotating shaft; 411. mounting holes; 412. a hinge joint; 413. and installing a lug.
Detailed Description
The technical scheme of the invention is further explained by the specific implementation mode in combination with the attached drawings.
As shown in fig. 1-3, this embodiment provides a support for deep foundation pit based on remote force stability monitoring, including a plurality of support backplate 1, four connection horizontal poles 2, a plurality of the edge of supporting backplate 1 all is provided with fore shaft 11, adjacent two support backplate 1 passes through fore shaft 11 fixed connection, four connect 2 end to end connections of horizontal pole and fix into the rectangle, a plurality of support backplate 1 is fixed in connect the outside of horizontal pole 2, adjacent two with it is fixed to connect horizontal pole 2 be provided with one between the support backplate 1 not with connect the fixed support backplate 1 of horizontal pole 2. The method is the same as the traditional Larsen steel sheet pile installation method, and a screen type installation method is adopted. Connect 2 inside rotations of horizontal pole and be connected with pivot detection mechanism 4, the 4 outsides of pivot detection mechanism are provided with two conduction poles 41, two the middle part of conduction pole 41 rotate connect in on the pivot detection mechanism 4, the one end of conduction pole 41 articulate in support on the backplate 1, so that support the deformation drive of backplate 1 the pivot detection mechanism 4 is rotatory or the drive conduction pole 41 is rotatory. The deformation generated by the supporting guard plate 1 is transmitted to the rotating shaft detection mechanism 4 through the conduction rod 41, so that the stress change condition of the supporting guard plate 1 can be conveniently detected through the rotating shaft detection mechanism 4.
Preferably, the conductive rods 41 are connected to both sides of the same support shield 1 or connected to two adjacent support shields 1. When connecting on same support backplate 1, can detect the atress situation of change of single support backplate 1, especially when detecting not connecting support backplate 1 on supporting the horizontal pole, the atress situation of change of judgement this position that can be fine, when two conduction poles 41 connect respectively on two adjacent support backplate 1, the deformation that its produced can be more obvious, and it is higher to detect the precision.
In order to transmit the acting force generated by the deformation of the supporting guard plate 1 to the rotating shaft detection mechanism 4 through the transmission rod 41 for detection, the rotating shaft detection mechanism 4 comprises a driving rotating shaft 48 and a static torque sensor 42, a driving circular truncated cone 43 is arranged in the middle of the driving rotating shaft 48, and the diameter of the driving circular truncated cone 43 is larger than that of the driving rotating shaft 48, so that the acting force arm is increased, and the generated acting force is more easily detected. The outer side wall of the driving circular truncated cone 43 is provided with a connecting lug 44, and the conduction rod 41 is rotatably connected to the connecting lug 44; the attachment tab 44 further increases the moment arm length. The static torque sensor 42 is sleeved on the driving rotating shaft 48 to detect the acting force of the driving rotating shaft 48 on the conducting rod 41. Two conduction poles 41 drive the both sides of pivot 48 respectively, and when the support produced deformation or change such as the slope is twistd reverse, the conduction pole 41 atress of both sides produced the change to produce the torsional force to drive pivot 48, can conveniently detect this change situation through static torque sensor 42, thereby can in time discover the problem.
In order to detect more accurately, a fixing plate 45 is arranged on the outer side wall of the driving circular truncated cone 43, an adjusting knob 47 is arranged on the fixing plate 45, the adjusting knob 47 is connected to the fixing plate 45 in a threaded manner, a torsional pressure sensor 46 is arranged on one side of the adjusting knob 47 close to the conducting rod 41, and the torsional pressure sensor 46 is abutted against the other end of the conducting rod 41. According to the installation angle of the conducting rod 41, the length of the adjusting knob 47 is adjusted, so that the torsion pressure sensor 46 can just abut against the conducting rod 41, and the detection can be conveniently carried out at any installation angle. The end of the conduction rod 41 connected to the support shield 1 is much longer than the end connected to the torsional pressure sensor 46, so as to form a lever, which amplifies the force generated by the support shield 1, so that the torsional pressure sensor 46 can more accurately detect the force, and the detection is more accurate.
Preferably, the length direction of the fixing plate 45 is perpendicular to a connecting line between the center of the driving circular truncated cone 43 and the center of the rotating shaft of the conducting rod 41. The conductive bar 41 is most accurately detected when it is installed to be parallel to the length direction of the fixing piece 45.
Preferably, a hinge joint 412 is arranged at one end of the conductive rod 41 connected with the support guard plate 1, the hinge joint 412 is rotatably connected with the conductive rod 41, and a mounting lug 413 is arranged at one side of the hinge joint 412 connected with the support guard plate 1. Therefore, the mounting lug piece 413 can be connected to the support guard plate 1 through a screw, and the connection is convenient.
Preferably, the conductive rod 41 is provided with a plurality of mounting holes 411 rotatably connected with the connection tabs 44. The distance from the mounting hole 411 to the joint 412 is constant, so that the amplification of the force by the conductive rod 41 can be easily calculated.
Preferably, a connecting inclined rod 3 is arranged between every two adjacent connecting cross rods 2, one end of each connecting inclined rod 3 is fixedly welded with the corresponding connecting cross rod 2, the other end of each connecting inclined rod 3 is connected with the corresponding connecting cross rod 2 through a screw, and a side shifting pressure sensor 31 is arranged between one end, provided with a screw, of each connecting inclined rod 3 and the corresponding supporting protection plate 1. The whole change value can be conveniently detected through the side-shifting pressure sensor 31, the danger level can be conveniently judged by combining the local deformation condition and the whole deformation condition, and early warning can be timely made.
A construction method of a support for a deep foundation pit based on remote force stability monitoring comprises the following steps: step S00: determining the range of the deep foundation pit, reserving lines with the interval of 10CM, and installing a supporting guard plate 1; step S10: the single supporting guard plates 1 are sequentially installed and aligned with the locking notch 11 of the previous supporting guard plate 1 during installation; step S20: welding and fixing the connecting cross rod 2 on the inner side of the support guard plate 1, then installing a connecting inclined rod 3 at a corner, and arranging a side shifting pressure sensor 31 between the connecting inclined rod 3 and the connecting cross rod 2; step S30: a rotating shaft detection mechanism 4 is arranged in the connecting cross rod 2, a conduction rod 41 is arranged according to the position of the supporting protection plate 1, a proper mounting hole 411 is selected, and then a hinge joint 412 is fixed on the supporting protection plate 1; step S40: adjust the static torque sensor 42 to zero it; after the installation is completed, the static torque sensor 42 can detect a certain value and can zero the value, so that the change value can be conveniently recorded; step S50: the adjustment knob 47 of the rotation shaft detection mechanism 4 is adjusted so that the torsional pressure sensor 46 abuts against the conductive rod 41 and the torsional pressure sensor 46 is zeroed. The torsional pressure sensor 46 and the conductive rod 41 must be set to zero after generating a certain acting force, so that the two act closely, and the change value can be detected more accurately.
While the invention has been described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes may be made and equivalents may be substituted for elements thereof without departing from the spirit and scope of the invention. The present invention is not to be limited by the specific embodiments disclosed herein, and other embodiments that fall within the scope of the claims of the present application are intended to be within the scope of the present invention.
Claims (9)
1. The utility model provides a support for deep basal pit based on long-range power stability control which characterized in that:
the supporting device comprises a plurality of supporting guard plates (1) and four connecting cross rods (2), wherein locking notches (11) are formed in the edges of the supporting guard plates (1), every two adjacent supporting guard plates (1) are fixedly connected through the locking notches (11), the four connecting cross rods (2) are connected end to end and fixed into a rectangle, the supporting guard plates (1) are fixed to the outer sides of the connecting cross rods (2), and one supporting guard plate (1) which is not fixed to the connecting cross rod (2) is arranged between every two adjacent supporting guard plates (1) which are fixed to the connecting cross rods (2);
connect horizontal pole (2) internal rotation and be connected with pivot detection mechanism (4), pivot detection mechanism (4) outside is provided with two conduction poles (41), two the middle part of conduction pole (41) rotate connect in on pivot detection mechanism (4), the one end of conduction pole (41) articulate in on supporting backplate (1), so that the deformation drive of supporting backplate (1) pivot detection mechanism (4) are rotatory or the drive conduction pole (41) are rotatory.
2. The support for the deep foundation pit based on remote force stability monitoring of claim 1, wherein:
the conduction rods (41) are connected to two sides of the same supporting protection plate (1) or connected to two adjacent supporting protection plates (1).
3. The support for the deep foundation pit based on remote force stability monitoring of claim 1, wherein:
the rotating shaft detection mechanism (4) comprises a driving rotating shaft (48) and a static torque sensor (42), a driving round table (43) is arranged in the middle of the driving rotating shaft (48), the diameter of the driving round table (43) is larger than that of the driving rotating shaft (48), a connecting lug (44) is arranged on the outer side wall of the driving round table (43), and the conducting rod (41) is rotatably connected to the connecting lug (44);
the static torque sensor (42) is sleeved on the driving rotating shaft (48) to detect the acting force of the driving rotating shaft (48) on the conducting rod (41).
4. The support for the deep foundation pit based on remote force stability monitoring of claim 3, wherein:
the outer side wall of the driving round platform (43) is provided with a fixing plate (45), an adjusting knob (47) is arranged on the fixing plate (45), the adjusting knob (47) is in threaded connection with the fixing plate (45), the adjusting knob (47) is close to one side of the conducting rod (41) is provided with a torsional pressure sensor (46), and the torsional pressure sensor (46) is abutted against the other end of the conducting rod (41).
5. The support for the deep foundation pit based on remote force stability monitoring of claim 4, wherein:
the length direction of the fixing sheet (45) is perpendicular to a connecting line between the circle center of the driving round platform (43) and the circle center of the rotating shaft of the conduction rod (41).
6. The support for the deep foundation pit based on remote force stability monitoring of claim 3 or 4, wherein:
the transmission pole (41) with the one end that supports backplate (1) and connect is provided with articulated joint (412), articulated joint (412) with transmission pole (41) rotate to be connected, articulated joint (412) with one side that supports backplate (1) and connect is provided with installation auricle (413).
7. The support for the deep foundation pit based on remote force stability monitoring of claim 3 or 4, wherein:
the conducting rod (41) is provided with a plurality of mounting holes (411) which are rotatably connected with the connecting lug plates (44).
8. The support for the deep foundation pit based on remote force stability monitoring of claim 3 or 4, wherein:
adjacent two be provided with between connecting horizontal pole (2) and connect down tube (3), the one end of connecting down tube (3) with connect horizontal pole (2) welded fastening, the other end of connecting down tube (3) with connect horizontal pole (2) screwed connection, be provided with side between the one end that connects down tube (3) and be equipped with the screw and support backplate (1) and move pressure sensor (31).
9. A construction method of a support for a deep foundation pit based on remote force stability monitoring according to any one of claims 1 to 5, comprising:
the method comprises the following steps: step S00: determining the range of the deep foundation pit, and reserving lines at intervals of 10CM for installing the supporting guard plates (1);
step S10: the single supporting guard plates (1) are sequentially installed and aligned with the locking notch (11) of the previous supporting guard plate (1) during installation;
step S20: welding and fixing the connecting cross rod (2) on the inner side of the support guard plate (1), then installing a connecting inclined rod (3) at a corner, and arranging a side shifting pressure sensor (31) between the connecting inclined rod (3) and the connecting cross rod (2);
step S30: a rotating shaft detection mechanism (4) is arranged in the connecting cross rod (2), a conduction rod (41) is arranged according to the position of the supporting guard plate (1), a proper mounting hole (411) is selected, and then a hinge joint (412) is fixed on the supporting guard plate (1);
step S40: adjusting the static torque sensor (42) to zero;
step S50: an adjusting knob (47) of the rotating shaft detection mechanism (4) is adjusted to enable the torsion pressure sensor (46) to be abutted against the conduction rod (41), and the torsion pressure sensor (46) is adjusted to be zero.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011129828.9A CN112281867B (en) | 2020-10-21 | 2020-10-21 | Construction method of deep foundation pit support based on remote force stability monitoring |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011129828.9A CN112281867B (en) | 2020-10-21 | 2020-10-21 | Construction method of deep foundation pit support based on remote force stability monitoring |
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| CN112281867A true CN112281867A (en) | 2021-01-29 |
| CN112281867B CN112281867B (en) | 2021-11-16 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202011129828.9A Active CN112281867B (en) | 2020-10-21 | 2020-10-21 | Construction method of deep foundation pit support based on remote force stability monitoring |
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| CN208533541U (en) * | 2018-06-25 | 2019-02-22 | 海东正平管廊设施制造有限公司 | A kind of supporting device and pattern foundation pit supporting structure equipment |
| KR102137045B1 (en) * | 2020-01-21 | 2020-07-23 | 임창진 | Temporary structure of sheathing having monitoring means |
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| CN200982967Y (en) * | 2006-12-12 | 2007-11-28 | 上海市第二市政工程有限公司 | Experimental device for predicting slurry performance in simulation of horizontal directional drilling construction |
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