CN209923995U - Auxiliary device for detecting inclination of bored pile - Google Patents
Auxiliary device for detecting inclination of bored pile Download PDFInfo
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- CN209923995U CN209923995U CN201920201090.9U CN201920201090U CN209923995U CN 209923995 U CN209923995 U CN 209923995U CN 201920201090 U CN201920201090 U CN 201920201090U CN 209923995 U CN209923995 U CN 209923995U
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Abstract
The utility model discloses an auxiliary device that becomes hole bored concrete pile gradient detected, its inclination of being applied to pore-forming bored concrete pile under the dry job condition detects, including entablature, bottom end rail and anchor clamps, entablature and bottom end rail are at central point coincide and swivelling joint, and the both ends of entablature and the both ends of bottom end rail have all set firmly anchor clamps for become hole bored concrete pile gradient and examine time measuring with entablature and bottom end rail horizontal fixation to pre-buried protecting on the section of thick bamboo. The utility model discloses an auxiliary device for detecting inclination of a bored concrete pile, which comprises an upper crossbeam, a lower crossbeam and a clamp, has simple structure, low manufacturing cost and light weight, only needs to fix the upper crossbeam and the lower crossbeam on a pre-buried pile casing through the clamp during detection, and is convenient to install and disassemble; the hole forming depth detection is carried out once every time a circulation section is constructed for the cast-in-place pile, the inclination condition of the cast-in-place pile can be preliminarily judged according to the detection result of each circulation section, and the purpose of guiding construction while detecting is achieved.
Description
Technical Field
The utility model relates to a city infrastructure construction underground works structural body excavation supporting fender pile engineering construction technical field, in particular to, relate to an auxiliary device that becomes hole bored concrete pile gradient and detect.
Background
The underground engineering foundation pit support is used for ensuring the safety and smooth operation of foundation pit excavation and foundation structure construction, ensuring the normal use of a foundation pit close to a building or an underground pipeline and preventing the occurrence of ground collapse and pit bottom piping; it plays the roles of retaining soil and water and controlling the deformation of the side slope.
The excavation depth of engineering foundation pits of underground comprehensive pipe galleries, underground rail transit, diversion underdrains, box culverts and the like is often 15.0-25.0 m, and the nearest distance between the enclosure structure and an adjacent building is only 0.40 m. The enclosure row pile is one type of foundation pit pile wall type enclosure system, the enclosure pile is usually formed by pouring, and the inclination of the pile body is one of important factors causing the limitation of the geometrical dimension of an underground engineering structure. If the pile body of the fender pile inclines towards the inside of the underground engineering structure, the serious person can reduce the geometric dimension of the underground engineering structure, reduce the bearing capacity and durability of the structure, seriously influence the stability and the service life of the underground engineering structure, and bring permanent potential safety hazard for long-term operation of the underground engineering structure.
The traditional cast-in-place pile inclination detection device usually adopts phi 28mm or phi 32mm hot-rolled ribbed steel bars, and the steel bars are processed and welded into a flat-bottom small steel bar cage hole detector with the outer diameter determined according to the hole diameter of the cast-in-place pile and the height of 3.0m or a steel bar bent ball (the diameter of the ball is slightly smaller than the diameter of a drilled hole). During detection, a special hoisting device is needed to be used for matched detection due to the fact that a hole detector or a round ball is heavy, and the detection device is complex to enter and exit and high in cost; or the hole detector or the round ball has insufficient rigidity and deforms due to poor welding quality of the hole detector or the round ball in the detection process, so that the hole wall of the cast-in-place pile is damaged; or the detection time of the inclination of the cast-in-place pile is long; or because of the hard irregularity of bored concrete pile pore wall cause the hole detection ware or ball to be blocked and can not accomplish whole bored concrete pile gradient detection etc. many aspect defects in the testing process, bored concrete pile gradient detects still in the detection after the bored concrete pile pore-forming in addition, can't in time control and guide the effect to bored concrete pile pore-forming construction.
The control and detection of the construction quality of the inclination of the pile body of the cast-in-place pile become key controllability detection contents of the construction of the structural body fender pile project, and the inclination detection equipment which is simple, portable, easy and quick to operate and capable of realizing detection and construction guidance is urgently needed.
SUMMERY OF THE UTILITY MODEL
The utility model provides an auxiliary device that becomes hole bored concrete pile gradient detected, its inclination of being applied to under the dry job condition of pore-forming bored concrete pile detects, and this auxiliary device cooperation pore-forming degree of depth detection device can carry out the gradient detection to the hole-forming bored concrete pile, has solved that traditional bored concrete pile gradient detection device equipment is heavy, complex operation is consuming time, can not detect the technical problem of limit guidance construction.
According to the utility model discloses an aspect provides an auxiliary device that pore-forming bored concrete pile gradient detected, its inclination of being applied to pore-forming bored concrete pile under the dry job condition detects, including entablature, bottom end rail and anchor clamps, the entablature is connected with the bottom end rail at central point coincide and rotation, the both ends of entablature with the both ends of bottom end rail all have set firmly anchor clamps for pore-forming bored concrete pile gradient is examined time measuring will entablature and bottom end rail horizontal fixation are to pre-buried on protecting a section of thick bamboo.
Further, the clamp is an inverted U-shaped member.
Furthermore, the inverted U-shaped component is formed by bending an integral stainless steel sheet or a metal sheet into an inverted U shape, or three stainless steel sheets or metal sheets are welded into an inverted U shape.
Further, the clamp is a clip member.
Furthermore, the upper cross beam and the lower cross beam are both provided with strip-shaped grooves distributed along the length direction, and the clamp is fixed on the upper cross beam through a fixing piece penetrating through the strip-shaped grooves of the upper cross beam; the clamp is fixed on the lower cross beam through a fixing piece penetrating through the elongated groove of the lower cross beam.
Furthermore, length dimension scales are marked on the upper cross beam and the lower cross beam.
Furthermore, a plurality of through holes distributed along the length direction are formed in the upper cross beam and the lower cross beam, and the clamp is fixed on the upper cross beam through a fixing piece penetrating through the through holes of the upper cross beam; the clamp is fixed on the lower cross beam through a fixing piece penetrating through the through hole of the lower cross beam.
Furthermore, the upper cross beam and the lower cross beam are made of stainless steel plates, metal plates or wood plates.
The utility model discloses following beneficial effect has:
the utility model discloses an auxiliary device that pore-forming bored concrete pile gradient detected, its inclination of being applied to pore-forming bored concrete pile under the dry job condition detects, including entablature and bottom end rail and anchor clamps, simple structure, low in manufacturing cost, light in weight only needs to pass through anchor clamps with entablature when detecting and fixes to pre-buried protecting a section of thick bamboo on, the installation with dismantle all very conveniently. Through entablature and bottom end rail level fixed to pre-buried protect a section of thick bamboo on, set up a plurality of pore-forming degree of depth check points on entablature and bottom end rail, cooperation pore-forming degree of depth detection device can obtain the pore-forming degree of depth condition of bored concrete pile on two different perpendiculars to can tentatively and judge the incline direction more directly perceivedly, can in time guide the construction of bored concrete pile effectively. And the bored concrete pile just once constructs a circulation section, just carries out pore-forming degree of depth detection once, and the setting of entablature and bottom end rail makes the position that can guarantee the check point of each circulation section all the same.
In addition to the above-described objects, features and advantages, the present invention has other objects, features and advantages. The present invention will be described in further detail with reference to the drawings.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification. In the drawings:
fig. 1 is a schematic structural diagram of an auxiliary device for inclination detection of a bored pile according to a preferred embodiment of the present invention;
fig. 2a is a schematic view of a cross-beam of an auxiliary device for inclination detection of a bored pile; fig. 2b is a schematic view of another construction of a cross-beam of an auxiliary device for inclination detection of a bored pile; 2c is another structure schematic diagram of the beam of the auxiliary device for detecting the inclination of the cast-in-situ bored pile;
fig. 3 is a schematic structural view of a jig of an auxiliary device for inclination detection of a bored pile;
FIG. 4 is a schematic diagram of inclination detection performed by an auxiliary device for inclination detection of a bored pile;
FIG. 5 is a histogram of hole depth and inclination of an A1-A2 cast-in-place pile;
FIG. 6 is a bar graph of hole depth and inclination of a B1-B2 bored concrete pile.
Illustration of the drawings:
1. pre-burying a protective cylinder; 2. a lower cross beam; 3. an upper cross beam; 4. a butterfly nut; 5. a screw; 6. a clamp; 7. detecting points; 8. a bolt; 9. a nut; 10. a disc-shaped gasket.
Detailed Description
The embodiments of the invention will be described in detail below with reference to the drawings, but the invention can be implemented in many different ways, which are defined and covered below.
As shown in fig. 1, the auxiliary device for inclination detection of a bored concrete pile according to the present embodiment is applied to inclination detection of a bored concrete pile under a dry working condition, and includes an upper beam 3, a lower beam 2, and clamps 6, wherein the upper beam 3 and the lower beam 2 are overlapped at a central point and rotatably connected, and the clamps 6 are fixedly arranged at both ends of the upper beam 3 and both ends of the lower beam 2, and are used for horizontally fixing the upper beam 3 and the lower beam 2 to an embedded casing 1 during inclination detection of the bored concrete pile.
The auxiliary device that pore-forming bored concrete pile gradient of this embodiment detected, its inclination that is applied to pore-forming bored concrete pile under the dry job condition detects, including entablature and bottom end rail and anchor clamps, simple structure, low in manufacturing cost, light in weight, only need pass through anchor clamps with entablature when detecting and fix to pre-buried protecting a section of thick bamboo on, the installation with dismantle all very conveniently. Embedding the pile casing is an important construction step for the construction of the cast-in-situ bored pile, the embedding depth of the pile casing is determined according to the geological and hydrological conditions of a construction site, and the pile casing mainly plays roles in positioning, drilling guiding, protecting orifices, isolating water on the outer surface layer of the inner hole of the hole and the like. Through entablature and bottom end rail level fixed to pre-buried protecting on the section of thick bamboo, set up a plurality of pore-forming degree of depth check points on entablature and bottom end rail, can obtain the pore-forming degree of depth condition of bored concrete pile on two different perpendicular planes to can tentatively and judge the incline direction more directly perceivedly, can in time guide the construction of bored concrete pile effectively. And the bored concrete pile just once constructs a circulation section, just carries out pore-forming degree of depth detection once, and the setting of entablature and bottom end rail makes the position that can guarantee the check point of each circulation section all the same.
In practical applications, the upper cross member 3 and the lower cross member 2 are made of a plate having a certain rigidity capable of being kept horizontal, such as a stainless steel plate, a metal plate, or a wood plate. The upper cross beam 3 and the lower cross beam 2 are made into long strips by stainless steel plates, metal plates or wood plates, and the length can be determined according to the maximum diameter of the embedded protection cylinder in practical application. The upper cross beam and the lower cross beam have certain rigidity, and the structural form of the beams, the adjusting method for adjusting the cross beam to be kept horizontal and the judging method for judging whether the cross beam is horizontal are more visual and convenient compared with the leveling and horizontal judgment of a disc, and the positions of two ends of the cross beam are only required to be ensured to be at the same height position.
The rotation connection mode of the crossing position of the upper cross beam 3 and the lower cross beam 2 can adopt a bolt 8 and a nut 9 for fastening connection, for the convenience of installation, the fastening nut is preferably a butterfly-shaped nut 4, the convenience of screwing and disassembling is realized, and for ensuring the fastening effect, at least one disc-shaped gasket 10 is arranged at the fastening position of the nut.
As shown in fig. 3, in the present embodiment, the clamp 6 is an inverted U-shaped member, and the inverted U-shaped member is fixed to the upper beam 3 and the lower beam 2 by a screw 5 and a butterfly nut 4. During installation, the inverted U-shaped component is buckled at the top end of the embedded protective cylinder 1, a screw hole is formed in at least one vertical baffle of the inverted U-shaped component, and the fixture is fixed to the embedded protective cylinder 1 through a fastener.
In practical application, the inverted-U-shaped component is made of stainless steel sheets or metal sheets, and can be bent into an inverted-U shape by adopting an integral stainless steel sheet or metal sheet, or welded into an inverted-U shape by adopting three stainless steel sheets or metal sheets.
In other embodiments, the clamps 6 may also be selected as clamp members, which are fixed to both ends of the upper and lower beams 3 and 2 and are clamped on the embedded casing 1 by the clamp members, so that the upper and lower beams 3 and 2 are horizontally fixed to the top end of the embedded casing 1.
As shown in fig. 2a, in this embodiment, the upper beam 3 and the lower beam 2 are provided with elongated grooves along the length direction, and the fastener screw 5 penetrates through the elongated grooves to fix the clamp 6 on the upper beam 3 and the lower beam 2.
The upper part of the inverted U-shaped component is provided with a screw hole, and the screw passes through the screw hole and the strip-shaped groove on the cross beam to fix the cross beam and the embedded casing 1. Whole crossbeam is equipped with rectangular shape groove along length direction, when the central skew of the center of protecting a section of thick bamboo and bored concrete pile, can control, front and back position adjustment with the auxiliary device that the gradient detected, in addition, when being applied to the bored concrete pile in different apertures, also can be suitable for through adjusting the position of fastener on rectangular shape groove, and the in-service use length of entablature and bottom end rail is adjustable promptly. As shown in fig. 2a, the elongated slot may be a whole slot along the length direction of the beam, as shown in fig. 2b, a shorter slot may be disposed at the center of the beam for adjusting the connection position of the upper beam and the lower beam, and two longer slots are disposed at two sides of the shorter slot for adjusting the fixing position of the clamp on the beam. For ease of installation, the fastening nut is preferably a butterfly nut 4, at least one disc washer 10 being provided at the fastening location of the nut in order to ensure the fastening effect and to facilitate the levelling of the upper and lower beams.
In another embodiment, as shown in fig. 2c, a plurality of through holes are formed in the upper beam 3 and the lower beam 2, and the screw 5 penetrates through the through holes to fix the clamp 6 on the upper beam 3 and the lower beam 2. In this embodiment, the installation position of the inclination detection auxiliary device is adjusted by the through holes at different positions.
The auxiliary device for detecting the inclination of the cast-in-situ bored pile is used for detecting the inclination of the cast-in-situ bored pile under the dry working condition, and comprises the following operation steps:
s1, respectively arranging 5-10 hole-forming depth detection points 7 on the upper cross beam 3 and the lower cross beam 2, presetting four fixture fixing positions on the embedded pile casing 1, and enabling the deviation between the central line of the embedded pile casing 1 and the central line of the cast-in-place pile to be not more than 50 mm; the deviation control of the center line of the embedded pile casing 1 and the center of the cast-in-place pile can adopt a total station coordinate lofting positioning and cross pile casing stay wire positioning rechecking method, the position of the pile casing is adjusted through movement, and the deviation of the embedded pile casing 1 and the center line of the cast-in-place pile is strictly controlled to be not more than 50 mm.
S2, after the cast-in-place pile is formed to a set circulation depth, fixing a clamp 6 of an auxiliary device for detecting the inclination of the formed-in-place pile to a clamp fixing position, installing a lower cross beam 2 and an upper cross beam 3, and adjusting to enable the upper cross beam 3 and the lower cross beam 2 to be kept horizontal; the leveling method can be divided into a manual leveling method and an automatic leveling method, wherein the manual leveling method can realize the adjustment of the installation height of the two ends of the upper cross beam 3 and the lower cross beam 2 by screwing the screw 5 of the fixture fixing part and/or setting the disc-shaped gaskets 10 with different thicknesses or numbers; the automatic leveling is that fine adjustment devices are arranged at two ends of the upper cross beam 3 and the lower cross beam 2, each fine adjustment device comprises a sensor and a controller, the distance value between the cross beam and the top end of the embedded casing 1 is preset in the sensor according to the actual situation of site construction, the vertical distance between the two end parts of the cross beam and the top end of the embedded casing 1 is measured through the sensors, and if one end of the cross beam is detected to be higher than a set value, the controller sends out an instruction to enable the fastener to be screwed down in a rotating mode, and the installation height of the end of the cross beam. Because the distance value between the cross beam and the embedded casing 1 is relatively small, in order to ensure the precision and reduce the error, the sensitivity of the sensor is relatively high. The connection mode and the control mode between the controller and the executing device for the rotary tightening of the fastener are carried out by using related control modules in the prior art.
S3, performing hole forming depth detection at the detection point 7 respectively, and recording detection data; the depth detection of the formed hole can adopt a laser range finder, and can also adopt the method that a weight is arranged on a long rope, and the release length of the long rope is measured after the weight touches the bottom, and other depth detection devices can also be adopted.
S4, removing the auxiliary device for detecting the inclination of the cast-in-situ bored pile, and constructing the cast-in-situ bored pile in the next circulation section;
s5, repeating the steps S2, S3 and S4 until the construction of the cast-in-place pile is completed;
s6, drawing the hole forming depth and inclination histogram of the cast-in-place pile according to all the detection data, and judging the hole forming inclination direction, the hole forming inclination depth position and the hole forming inclination of the cast-in-place pile according to the hole forming depth and inclination histogram of the cast-in-place pile.
The method for detecting the inclination of the bored concrete pile under the dry working condition of the embodiment utilizes the auxiliary device for detecting the inclination of the bored concrete pile, the installation and the disassembly are simple, each circulating section is constructed by the bored concrete pile, the detection of the depth of the formed hole is carried out once, the inclination condition of the bored concrete pile can be preliminarily judged according to the detection result of each circulating section, the hole forming construction of the bored concrete pile at the next circulating section can be controlled and guided in time, the purpose of detecting and guiding the construction is really realized, after the construction is completed, all detection data are drawn into a hole forming depth and inclination histogram, the hole forming inclination direction of the bored concrete pile, the hole forming inclination depth position and the hole forming inclination can be further judged and calculated from the histogram.
In this embodiment, preset four anchor clamps fixed positions on pre-buried casing, determined the drilling depth of two perpendiculars, in practical application, can change the measured perpendicular through rotating one of them crossbeam to obtain the drilling depth data of more check points, can judge the incline direction of bored concrete pile more accurately.
In this embodiment, in step S1, the inclination of the embedded casing 1 in the vertical direction is not greater than 0.5%. The inclination of the embedded pile casing 1 in the vertical direction can be rechecked by adopting a cross horizontal height difference measurement of the top surface of the pile casing and a measurement of an included angle between a pile casing top hanging hammer line and a pile casing retaining wall, the horizontal position of the pile casing top is adjusted and leveled, and the inclination of the pile casing 1 in the vertical direction is strictly controlled. The auxiliary device for inclination detection is arranged on the embedded protective cylinder 1 through the clamp, if the inclination of the embedded protective cylinder 1 is too large, an error occurs in inclination detection leveling, and therefore the accuracy of detection data is affected.
In this embodiment, in step S1, the four fixture fixing positions are uniformly distributed on the circumference of the embedded casing 1.
The clamp fixing positions are set for ensuring that each circulation section is detected, the upper cross beam and the lower cross beam are all installed to the same position, the detected data are the hole forming depth of the same face of the cast-in-place pile, the upper cross beam and the lower cross beam are vertically intersected, the four clamp fixing positions are evenly distributed on the circumference of the embedded casing, the measured hole forming depth data are the depth of a group of vertical faces of the hole forming cast-in-place pile, and the judgment on the inclination condition of the cast-in-place pile is more visual and representative. Of course, the upper and lower cross members may be intersected at an angle according to the practical application, and the vertical intersection is not necessarily required.
In this embodiment, in step S1, 5 to 10 hole-forming depth detection points are symmetrically disposed on both sides of the center point of the upper beam or the lower beam. The detection points are symmetrically arranged on two sides of the central point of the upper cross beam or the lower cross beam, so that the inclination direction can be conveniently and preliminarily judged according to detection data in the follow-up process. To the selection of pore-forming depth detection point on entablature and bottom end rail, can mark length dimension scale on the crossbeam, confirm pore-forming depth detection point through the scale position, convenient and fast. For the cross beam with a plurality of through holes on the upper cross beam and the lower cross beam, the detection points can also be directly positioned at different through holes.
In this embodiment, in step S3, a laser range finder is used for detecting the depth of the formed hole. The laser range finder is a relatively common instrument for measuring the drilling depth, is simple and convenient to operate, and preferably measures continuously 3 times at the same detection point in order to ensure the accuracy of detection data, and takes the arithmetic mean value of the 3 measured values as the detection data of the detection point to be used as a histogram of the depth and the gradient of the bored concrete pile. Preferably, the measured data is directly transmitted to the computer for recording by connecting the laser range finder with the computer. In step S6, a histogram of the hole forming depth and inclination of the cast-in-place pile is drawn, which may be manually drawn on a metric paper or computer-based drawing.
In this embodiment, according to the pore-forming depth detection data in step S3, the detection data of the different detection points of the front and rear two circulation segments and the same circulation segment are compared, the inclination direction of the cast-in-place pile is preliminarily determined, and the pore-forming construction of the cast-in-place pile of the next circulation segment is adjusted according to the inclination direction.
The detection data of the different check points of two circulation sections and same circulation section before and after the contrast can tentatively judge bored concrete pile pore-forming incline direction, according to the construction of the next circulation section of incline direction adjustment. The specific operation comprises the steps of adopting a backfill filling pile to fill the same soil sample in the inclined depth range, leveling the same soil sample through a deposition compact surface, then re-drilling, and adopting a total station to correct the verticality of a drill rod of the drilling machine.
Example 1
Preparing before construction of a pore-forming cast-in-place pile under dry operation conditions:
the diameter of the cast-in-place pile is 1000mm, a steel casing with the inner diameter of 1200mm, the wall thickness of 20mm and the length of 3000 mm is selected, the position of the central point of the cast-in-place pile is accurately positioned on the leveled dry land ground, and the embedded casing 1 is accurately positioned according to the position of the central point of the cast-in-place pile, so that the top of the embedded casing 1 is 300mm higher than the ground and the embedded part thereof is 2700mm below the ground. The deviation between the central line of the embedded pile casing and the central line of the cast-in-place pile is not more than 50mm, and the inclination of the embedded pile casing 1 in the vertical direction is not more than 0.5%.
After a measurement technician rechecks that the plane position and the vertical gradient of the central point of the embedded pile casing 1 are accurate, the bored concrete pile hole forming construction under the dry operation condition can be carried out.
S1, respectively arranging 6 hole-forming depth detection points 7 on the upper cross beam 3 and the lower cross beam 2, and uniformly presetting four fixture fixing positions on the circumference of the embedded pile casing 1;
according to the diameter of the embedded protective cylinder 1, the upper cross beam 3 and the lower cross beam 2 are respectively formed by 1 stainless steel plate with the length of 1300mm, the width of 60mm and the thickness of 10mm and 3 sections of strip-shaped holes with the width of 12mm and the lengths of 490mm, 490mm and 180mm, which are formed by drilling at the two end parts and the middle part of the steel plate in the length direction in the middle part of the steel plate width. The distance between the adjacent strip-shaped holes is 50mm, and the distance between the strip-shaped holes at the two end parts and the two ends of the steel plate is 20 mm.
The fixture 6 is an inverted U-shaped component formed by welding two stainless steel plate baffles with vertical length of 50mm, width of 50mm and thickness of 10mm and a stainless steel plate top cover plate with horizontal length of 60mm, width of 50mm and thickness of 10 mm.
As shown in FIG. 4, 6 hole-forming depth detection points 7 are arranged at positions 490mm, 250mm and 150mm from the center point on both sides of the center point of the top surface A1-A2 of the lower beam 2, and the detection points are respectively numbered AC1, AC2, AC3, AC4, AC5 and AC 6. And 6 hole-forming depth detection points 7 are arranged at positions 490mm, 250mm and 150mm away from the center point on two sides of the center point of the top surface of the B2-B1 of the upper cross beam 3, and the detection points are numbered BC1, BC2, BC3, BC4, BC5 and BC 6.
And S2, when the hole of the cast-in-place pile is formed to the depth of the 1 x 5.000m circulation section below the top surface of the embedded pile casing 1, detecting the inclination of the cast-in-place pile for the first time.
S201: on the anchor clamps fixed position of pre-buried casing 1 was fixed with auxiliary device's that becomes hole bored concrete pile gradient detected anchor clamps 6, concrete installation procedure was: installing a transverse baffle on the top of the clamp 6 above the top of the embedded protective sleeve 1; installing a vertical baffle with a round hole at the inner side of the embedded pile casing 1, and reserving a certain distance gap with the inner side wall surface of the embedded pile casing 1; and installing another vertical baffle without a round hole outside the embedded protection cylinder 1 and tightly attaching the vertical baffle to the outer side wall surface of the embedded protection cylinder 1. One end of a screw rod 5 with the length of 60mm and the diameter of 10mm transversely extends into a nut 9 which is provided with 2 disc-shaped gaskets 10 with the outer side of the round hole vertical baffle and the outer side of which is placed, the outer diameter of the screw rod is 28mm multiplied by the inner diameter of 12.2mm multiplied by the thickness of 1.50mm multiplied by the free height of 2.40mm, the round hole of the vertical baffle and the inner side wall of a clamp 6 to be connected with the vertical baffle, so that the end surface of one end of the screw rod 5 is contacted with the inner side wall surface of the embedded protection cylinder 1, and the other end of. The butterfly nut 4 is screwed up by rotation, so that the clamp 6 is tightly attached to the inner and outer side wall surfaces of the embedded protection cylinder 1 and is fixed.
S202: 5 disc-shaped gaskets 10 with the outer diameter of 28mm, the inner diameter of 12.2mm, the thickness of 1.50mm and the free height of 2.40mm are respectively arranged at the screw rods 5 above the transverse baffle plate on the top of the 4 sets of clamps 6. Lay 2 lower beam in pre-buried protect 1 top surface of a section of thick bamboo 2 sets of anchor clamps 6 top relatively, make 2 bottom surface both ends of lower beam and dish packing ring 10 in close contact with, make 2 sets of anchor clamps 6 top transverse baffle top and length be 60mm phi 10mm screw rod 5, pass 5 dish packing ring 10 respectively, 2 tip rectangular holes of lower beam, 2 top surface of lower beam rectangular hole screw rods 5 punishment 2 dish packing ring 10 that lay respectively of punishment of 2 top surface rectangular hole screw rods, and 2 top surface both ends of 2 top surfaces of lower beam 10 top surfaces 30mm are connected with phi 10mm butterfly nut 4 to the outer exposure.
S203: the upper crossbeam 3 is placed above 2 sets of clamps 6 relative to the top surface of the embedded protective cylinder 1, two ends of the bottom surface of the upper crossbeam 3 are in close contact with the disc-shaped gaskets 10, screws 5 with the length of 60mm phi 10mm are placed above the transverse baffle plate of the 2 sets of clamps 6, the screws 5 respectively penetrate through the 5 disc-shaped gaskets 10, the strip-shaped holes at two ends of the upper crossbeam 3 and the strip-shaped holes at two ends of the top surface of the upper crossbeam 3, the 2 disc-shaped gaskets 10 placed at the screw 5 are respectively placed, and the top surfaces of the 2 disc-shaped gaskets 10 at two ends of the top surface of the upper crossbeam 3 are exposed for 30mm and.
S204: at the vertical intersection of the lower cross beam 2 and the upper cross beam 3, 1 bolt 8 with the length of 60mm phi 10mm is used, 2 disc-shaped gaskets 10 with the outer diameter of 28mm, the inner diameter of 12.2mm, the thickness of 1.50mm and the free height of 2.40mm are placed in the central strip-shaped hole of the bottom surface of the lower cross beam 2, the central strip-shaped hole of the upper cross beam 3 and the central strip-shaped hole of the top surface of the upper cross beam 3 upwards and penetrate through the central strip-shaped hole of the bottom surface of the lower cross beam 2, the central strip-shaped hole of the upper cross beam 3 and the central strip-shaped hole of the top surface of the upper cross beam 3, and 35.
S205: and a level ruler which is qualified by the national legal measurement department is used and placed on the top surfaces of the lower cross beam 2 and the upper cross beam 3, and whether the lower cross beam 2 and the upper cross beam 3 are installed in a horizontal state or not is checked. The top surfaces of the lower cross beam 2 and the upper cross beam 3 are leveled and respectively in a horizontal state and fixed by respectively screwing the two ends of the lower cross beam 2, the two ends of the upper cross beam 3, a screw 5 at the vertical intersection of the lower cross beam 2 and the upper cross beam 3 and a butterfly nut 4 on a bolt 8.
S3, performing hole forming depth detection at the detection point 7 respectively, and recording detection data;
the front end (top) of a laser head of the laser range finder faces downwards to a hole of the cast-in-place pile and is respectively arranged on a detection point 7 on the top surface of the lower cross beam 2 and the top surface of the upper cross beam 3 by using a 70m UT395B type handheld laser range finder which is qualified by the verification of the national legal metrological department. A laser range finder detection step:
s301: before detection, the 'start/measure' key of the distance measuring instrument is pressed to start the instrument. Firstly, a starting picture is seen, and a single measurement interface is automatically entered at a later time; pressing down a 'lofting/unit' key of the distance meter to reset the current measurement unit, wherein the measurement unit is set to be 0.000 m; in the default state, the rangefinder "reference/timing measurement" key is pressed 2 times for a short time, the rangefinder changing from back reference to front reference (the starting point of the measurement at this time is the top of the rangefinder).
In a mode to be tested, a 'starting up/measuring' key is pressed for a short time, and the distance measuring instrument emits laser; locking the measuring target, pressing the 'starting up/measuring' key for a short time, measuring the distance once by the distance measuring instrument, displaying the distance in the main display area of the screen, and displaying the historical data measured for the last 3 times in the auxiliary display area. And continuously measuring 3 times at each detection point 7, making observation data records in time, and taking the arithmetic mean value of the 3 measurement values as the observation data of the observation point.
After the observation data is recorded, a 'shutdown/clear' key is pressed for a short time, and historical data measured in the last 3 times is cleared.
S302: and recording the observed data.
According to the detection step of S301, hole forming depth observation data of detection points of the top surface AC1, AC2, AC3, AC4, AC5 and AC6 of the lower cross beam 2 are measured in sequence, and detection data are recorded in time. The detection shows that the measured values of the pore-forming depth are 5.023m, 5.035m, 5.002m, 4.978m, 4.996m and 5.013m respectively.
According to the detection step of S301, hole forming depth observation data of detection points BC1, BC2, BC3, BC4, BC5 and BC6 on the top surface of the upper cross beam 3 are measured in sequence, and detection data are recorded in time. The measured values of the pore-forming depth are 4.980m, 5.000m, 5.026m, 5.012m, 5.022m and 5.023m respectively.
S4, removing the auxiliary device for detecting the inclination of the cast-in-situ bored pile, and constructing the cast-in-situ bored pile in the next circulation section;
and after the measurement is finished, immediately removing the auxiliary device for detecting the inclination on the top surface of the embedded pile casing 1. And continuing to carry out hole forming construction of the next 5.000m circulation section of the cast-in-place pile.
S5, repeating the steps S2, S3 and S4 until the construction of the cast-in-place pile is completed;
and when the hole of the cast-in-place pile is formed to the depth of the 2 x 5.000m circulation section below the top surface of the embedded pile casing 1, the inclination detection of the cast-in-place pile can be carried out for the second time. During detection, according to the same installation position and the same detection point position of the auxiliary device for detecting the inclination of the cast-in-place pile for the first time, the detection step of S3 is repeated, the pore-forming depth observation data of the detection points 7 on the top surfaces of the lower cross beam 2 and the upper cross beam 3 are completed, and the detection data record is made in time.
Through detection, the measured values of the hole forming depths of detection points of the top surfaces AC1, AC2, AC3, AC4, AC5 and AC6 of the lower cross beam 2 are 9.935m, 9.990m, 10.008m, 10.034m, 10.005m and 10.065m respectively; the measured values of the hole forming depths of the detection points BC1, BC2, BC3, BC4, BC5 and BC6 on the top surface of the upper cross beam 3 are 10.035m, 10.000m, 10.048m, 10.044m, 10.085m and 10.105m respectively.
And when the hole of the cast-in-place pile is formed to the depth of the 3 x 5.000m circulation section below the top surface of the embedded pile casing 1, the inclination detection of the cast-in-place pile can be carried out for the third time. During detection, according to the same installation position and the same detection point position of the auxiliary device for detecting the inclination of the cast-in-place pile for the first time, the detection step of S3 is repeated, the pore-forming depth observation data of the detection points on the top surfaces of the lower cross beam 2 and the upper cross beam 3 are completed, and the observation data record is made in time.
Through detection, the measured values of the hole forming depths of detection points of the top surfaces AC1, AC2, AC3, AC4, AC5 and AC6 of the lower cross beam 2 are 11.135m, 14.990m, 15.028m, 15.088m, 15.006m and 15.089m respectively; the measured values of the hole forming depths of the top surfaces BC1, BC2, BC3, BC4, BC5 and BC6 of the upper cross beam 3 are 15.035m, 15.186m, 15.248m, 15.244m, 15.185m and 12.335m respectively.
And when the hole of the cast-in-place pile is formed to the depth of the 4 multiplied by 5.000m circulation section below the top surface of the embedded pile casing 1, the inclination detection of the cast-in-place pile can be carried out for the fourth time. During detection, according to the same installation position and the same observation point position of the auxiliary device for detecting the inclination of the cast-in-place pile for the first time, the detection step of S3 is repeated, the pore-forming depth detection data of the detection points on the top surfaces of the lower cross beam 2 and the upper cross beam 3 are completed, and the detection data record is made in time.
Through detection, the measured values of the hole forming depths of detection points of the top surfaces AC1, AC2, AC3, AC4, AC5 and AC6 of the lower cross beam 2 are 11.135m, 18.990m, 20.128m, 20.288m, 20.056m and 20.009m respectively; the measured values of the hole forming depths of the top surfaces BC1, BC2, BC3, BC4, BC5 and BC6 of the upper cross beam 3 are 20.165m, 20.086m, 20.148m, 20.044m, 18.085m and 12.335m respectively.
And (3) repeating the detection step of operation S3 according to the same installation position and the same detection point position of the auxiliary device for detecting the inclination of the cast-in-place pile for the first time, sequentially completing the observation data of the pore-forming depth of the detection points on the top surfaces of the lower cross beam 2 and the upper cross beam 3 when the depth of the pore-forming of the cast-in-place pile reaches the depth of the 5 x 5.000m circulation section below the top surface of the embedded pile casing 1 and the depth of the pore-forming section … … reaches the design depth, and.
S6, drawing the hole forming depth and inclination histogram of the cast-in-place pile according to all the detection data, and judging the hole forming inclination direction, the hole forming inclination depth position and the hole forming inclination of the cast-in-place pile according to the hole forming depth and inclination histogram of the cast-in-place pile.
And after the field gradient detection is finished, collecting the detection data acquired on the field in time. And drawing a histogram of the hole forming depth and the inclination of the cast-in-place pile on the metric paper, as shown in fig. 5 and 6.
S601: and judging the inclined direction and the inclined depth position of the formed hole.
According to the fig. 5 and 6, when the hole forming depth of the cast-in-place pile reaches the 3 × 5.000m circulation section, the measured values of detection points of AC1 in the a1-a2 direction of the lower cross beam 2 are 11.135m and less than the measured values of detection points of AC2, AC3, AC4, AC5 and AC6 respectively, and the measured values of detection points of AC2, AC3, AC4, AC5 and AC6 are all about 15.000m, and it is preliminarily inferred that the cast-in-place pile starts to deviate from the a1 direction and deviates from the a2 direction when the hole forming depth approaches 11.135 m; the measured values of detection points BC6 in the direction from B2 to B1 of the upper cross beam 3 are 12.335m smaller than those of detection points BC1, BC2, BC3, BC4 and BC5, and the measured values of the detection points BC1, BC2, BC3, BC4 and BC5 are all about 15.000m, so that the cast-in-place pile is initially deduced to deviate from the direction B1 and deviate to the direction B2 when the hole forming depth is nearly 12.335 m.
According to fig. 5 and 6, when the hole forming depth of the cast-in-place pile reaches the 4 × 5.000m circulation section, the measured values of detection points of AC1 and AC2 in the directions from a1 to a2 of the lower cross beam 2 are 11.135m and 18.990m are smaller than the measured values of detection points of AC3, AC4, AC5 and AC6 respectively, the measured values of the detection points of AC3, AC4, AC5 and AC6 are about 20.000m respectively, and the cast-in-place pile is deduced to deviate from the direction of a1 and deviate from the direction of a2 when the hole forming depth is close to 11.135m again; the measured values of detection points BC5 and BC6 in the directions B2-B1 of the upper cross beam 3 are 18.085m and 12.335m which are smaller than those of detection points BC1, BC2, BC3 and BC4, the measured values of the detection points BC1, BC2, BC3 and BC4 are about 20.000m, and the cast-in-place pile is estimated to deviate from the direction B1 and deviate from the direction B2 when the hole forming depth approaches 12.335m again.
According to the above inference, the cast-in-place pile is finally judged to deviate from the A1-B1 direction and deviate from the B2-A2 direction when the hole forming depth is close to 11.135 m-12.335 m.
S602: and (5) judging the inclination of the formed hole.
According to fig. 5 and 6, the inclination θ (unit:%) when the hole forming depth of the cast-in-place pile reaches the 4 × 5.000m circulation section is: the inclination θ in the a1-a2 direction of the lower cross beam 2 is (horizontal distance between two detection points AC1 and AC 2)/(absolute value of difference between measurement values of hole forming depths at two detection points AC1 and AC 2) × 100%, (0.490-0.250 m)/(18.990m-11.135m) × 100%, (0.240m/7.855m) × 100%, (3.1%); the inclination θ of the upper beam 3 in the direction from B2 to B1 is (horizontal distance between BC6 and BC 5)/(absolute value of difference between measured hole-forming depths at BC6 and BC 5) × 100%, (0.490m-0.250m)/(18.085m-12.335m) × 100%, (0.240m/5.750m) × 100%, (4.2%).
S603: according to the calculation principle and method of S602, the inclination theta (unit:%) when the hole forming depth of the cast-in-place pile reaches the 5 x 5.000m circulation section, … … and the nth x 5.000m circulation section or the design depth is sequentially calculated as follows: the inclination θ in the a1-a2 direction of the lower cross beam 2 is (horizontal distance between AC1 and AC3 or AC 4)/(absolute value of difference between measurement values of the hole forming depth at AC1 and AC3 or AC 4) × 100%; the inclination θ of the upper beam 3 in the direction from B2 to B1 is (the horizontal distance between two detection points BC6 and BC4 or BC 3)/(the absolute value of the difference between the measurement values of the hole-forming depths at two detection points BC6 and BC4 or BC 3) × 100%.
By the detection method, the following steps can be detected: the inclined direction, inclined depth and inclination of the formed hole when the depth of the formed hole of the cast-in-place pile reaches a certain circulation section or designed depth. According to the detection result of each circulation section, the hole forming construction of the cast-in-place pile of the next circulation section can be controlled and guided in time, and the final purpose of guiding the construction while detecting is really realized.
The inclination cyclic detection method of the bored pile under the single dry operation condition is described above. When the pore-forming bored concrete pile is a plurality of or different pore diameters under the dry operation condition, the inclination of the pore-forming bored concrete pile can be detected according to the detection method.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (8)
1. An auxiliary device for detecting the inclination of a bored pile, which is applied to the inclination detection of the bored pile under dry operation conditions, is characterized in that,
comprises an upper beam (3), a lower beam (2) and a clamp (6),
the upper beam (3) and the lower beam (2) are overlapped at the central point and are connected in a rotating way,
the two end parts of the upper cross beam (3) and the two end parts of the lower cross beam (2) are fixedly provided with the clamp (6) and used for horizontally fixing the upper cross beam (3) and the lower cross beam (2) to the embedded pile casing (1) during inclination detection of the bored pile.
2. Auxiliary device for inclination detection of a bored pile according to claim 1,
the clamp (6) is an inverted U-shaped component.
3. Auxiliary device for inclination detection of a bored pile according to claim 2,
the inverted U-shaped component is formed by bending an integral stainless steel sheet or a metal sheet into an inverted U shape, or three stainless steel sheets or metal sheets are welded into an inverted U shape.
4. Auxiliary device for inclination detection of a bored pile according to claim 1,
the clamp (6) is a clamp component.
5. Auxiliary device for inclination detection of a bored pile according to any one of claims 1 to 4,
the upper beam (3) and the lower beam (2) are both provided with strip-shaped grooves distributed along the length direction,
the clamp (6) is fixed on the upper cross beam (3) through a fixing piece penetrating through a long groove of the upper cross beam (3);
the clamp (6) is fixed on the lower cross beam (2) through a fixing piece penetrating through the long-strip-shaped groove of the lower cross beam (2).
6. Auxiliary device for inclination detection of a bored pile according to claim 5,
the upper cross beam (3) and the lower cross beam (2) are marked with length scale marks.
7. Auxiliary device for inclination detection of a bored pile according to any one of claims 1 to 4,
the upper beam (3) and the lower beam (2) are both provided with a plurality of through holes which are distributed along the length direction,
the clamp (6) is fixed on the upper cross beam (3) through a fixing piece penetrating through a through hole of the upper cross beam (3);
the clamp (6) is fixed on the lower cross beam (2) through a fixing piece penetrating through a through hole of the lower cross beam (2).
8. Auxiliary device for inclination detection of a bored pile according to any one of claims 1 to 4,
the upper cross beam (3) and the lower cross beam (2) are made of stainless steel plates, metal plates or wood plates.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109680736A (en) * | 2019-02-15 | 2019-04-26 | 中建五局土木工程有限公司 | The auxiliary device and inclination checking method of pore-creating filling pile gradient detection |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109680736A (en) * | 2019-02-15 | 2019-04-26 | 中建五局土木工程有限公司 | The auxiliary device and inclination checking method of pore-creating filling pile gradient detection |
| CN109680736B (en) * | 2019-02-15 | 2024-05-10 | 中建五局土木工程有限公司 | Auxiliary device for detecting inclination of hole-forming cast-in-place pile and inclination detection method |
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