CN204457426U - A kind of a complete set of equipment large-section in-situ concrete pile under existing building being carried out to drilling core checking - Google Patents

Abstract

The utility model discloses a complete set of equipment for core-drilling detection of large-diameter cast-in-place piles under existing buildings, comprising a base, a drilling rig and a hoisting system, the drilling rig is provided with a drilling tool, and the drilling tool includes an active drill Rod and several driven drill rods, coring barrels and drill bits for increasing the length of the drilling tool. The winch system includes a tower and a winch hinged on the base; the base is provided with an adjustment mechanism for adjusting its inclination angle , the two sides of the base are provided with guide rails, and the base is also provided with a base screw for moving the drilling rig and winch system, one end of the base screw is connected with a drive motor, and the base screw drives the drilling rig and the winch The system slides along rails. The utility model adopts the screw rod to adjust the inclination angle of the drilling rig, and the spherical groove of the foot support cooperates with the bottom of the bolt to adjust the inclination angle of the drill rod with high precision. Core-pulling work of cast-in-place piles in existing buildings.

Description

A complete set of equipment for core-drilling detection of large-diameter cast-in-situ piles under existing buildings

technical field

The utility model belongs to the technical field of building construction, in particular to a complete set of equipment for core-drilling detection of large-diameter cast-in-place piles under existing buildings.

Background technique

Existing building foundations need to be inspected for the following reasons:

(1) During the rapid development of the reform and opening-up economy, due to the relative lag in planning and construction management, there have been a large number of construction projects that have not been officially submitted for construction in many places, and project quality inspection and identification are required;

(2) For the renovation and appraisal of old buildings, due to historical reasons, the data is lost and the foundation is unknown

(3) Under the action of natural factors such as earthquakes, typhoons, seawater erosion, and human factors such as overloading and ship collision, the foundation may have deteriorated and been damaged, and the foundation also needs to be identified;

(4) For some newly built buildings, the superstructure is tilted and cracked due to foundation problems, and the foundation needs to be re-tested and appraised.

For the pile foundation under the existing building, because it is connected with the superstructure, the working space is narrow, and the current drilling equipment, such as XY-1 and XY-1A, cannot completely drill the pile foundation under the existing building due to structural reasons. For pile foundations, the existing problems mainly include: ① For the drilling rig that needs to open the gyrator, the shortest distance between the opening position and the column (wall) is generally only about 60cm, and it cannot be close to the top surface of the pile. The complete core sample of the whole pile; ②For the base sliding drilling rig, although it can be close to the column (wall), the installation and disassembly of the drill pipe cannot be completed due to the obstacle of the column (wall); ③The control ability of the drilling angle is not enough. In the case of drilling inclined holes at small angles (the angle with the plumb line is within 5 ^° ), the existing drilling rigs cannot accurately control the required inclination angle because they do not have precise leveling and measuring devices.

Utility model content

In order to solve the technical problem that the existing building space is narrow and it is difficult to take out the complete cast-in-place pile core sample, the utility model provides an angle-adjustable, inclined drilling, which can take out the complete core sample in the narrow space. A complete set of equipment for core drilling testing of large diameter cast-in-place piles.

In order to solve the above problems, the utility model is realized according to the following technical solutions:

The complete set of equipment for core drilling detection of large-diameter cast-in-situ piles under existing buildings described in the utility model includes a base, a drilling rig and a hoisting system. The drill pipe and the driven drill pipe, coring barrel and drill bit that enter the borehole, the winch system includes a tower and a winch hinged on the base; the base is provided with an adjustment mechanism for adjusting its inclination angle, so Both sides of the base are provided with guide rails, and the base is also provided with a base screw rod for moving the drilling machine. One end of the base screw rod is connected with a drive motor, and the base screw rod drives the drilling machine to slide along the guide rails.

Further, the adjustment mechanism includes an adjustment bolt hole arranged on the base, a screw matched with the adjustment bolt hole, and a locking mechanism for locking the screw; the bottom of the screw is a spherical end, and the bottom of the screw is provided with a A foot support matched with the spherical end, the foot support is provided with a concave spherical groove matched with the spherical end.

Further, the locking mechanism includes a locking seat arranged on the base corresponding to the adjusting bolt hole and a locking nut matched with the locking seat, and the locking nut is provided with a mounting hole for a screw rod, so A locking plane is provided at one end of the screw rod and the mounting hole of the locking nut, the cross section of the mounting hole matches the cross section of the screw rod, the locking seat is provided with positioning teeth, and the locking nut is provided with As for the fixed tooth cooperating with the positioning tooth of the locking seat, the locking nut is radially provided with a bolt hole, and the bolt hole is provided with a locking bolt.

Further, the drilling rig is a vertical shaft rotary drilling rig, which drives the drilling tool to rotate. The active drill rod is connected with the driven drill rod by a screw, the active drill rod is provided with a through hole, and the drilling rig is also provided with a water inlet pipe, and the water inlet pipe is connected with the through hole of the active drill rod .

Further, the length of the active drill rod L ₃ ≤ U-L' ₁ -L ₂ , when opening the hole, the sum of the length of the coring barrel and the length of the drill bit L ₄ ≤ L'₁; each drilling depth K ≤ UL ₁ -L ₂ , during normal drilling, the length of the core barrel L ₅ ≥ K, the length of the driven drill pipe is an integral multiple of the designed secondary footage during normal drilling, where U is the height of the working space, L ₁ is the height of the top of the rig head from the ground, L ₁ ' is the height of the bottom of the rig head from the ground, and L ₂ is the distance between the water inlet pipe and the active drill pipe joint.

Further, an inclinometer for measuring the inclination angle of the vertical axis of the drilling rig is arranged on the base to detect the inclination angle of the vertical axis of the drilling rig.

Further, a circular level is provided on the base to detect the horizontal state of the base.

Further, the drilling rig is provided with a low-speed high-torque reverse gear, which is used to assist in removing the driven drill rod.

A method for core-drilling testing of large-diameter cast-in-place piles under existing buildings, comprising:

(1) Install the drilling rig so that the opening position is as close as possible to the column (wall) above the top of the pile, and determine the inclination angle α required for drilling, and its maximum value is Where D is the diameter of the pile, d is the distance between the center of the borehole and the side of the pile, H is the length of the pile, and h is the height of the cap;

(2) Adjust the screw rod on the base so that the base is set horizontally. Suppose the initial inclination angle of the active drill pipe is θ at this time, and its projection θ ₁ in the vertical plane passing through the longitudinal axis of the base is The inclination angle is θ ₂ ;

(3) Eliminate the included angle θ ₂ of the drilling tool on the horizontal axis along the vertical plane, place the inclinometer vertically on the base at the side of the vertical axis of the drilling rig, and adjust the screw on the base until the inclinometer indicates that the active drill pipe is passing through the base The inclination angle of the horizontal axis along the vertical plane is 0; the number of turns N ₂ of the rotating support c screw can be estimated by the formula: Among them, δ is the adjustable inclination angle of the horizontal axis of the base when the screw rotates one circle, X is the pitch of the screw, and B is the distance between the horizontal axis of the base and the screw;

(4) Eliminate the included angle θ ₁ of the drilling tool along the vertical axis on the vertical axis, and adjust the active drill rod to the required inclination angle α; place the inclinometer on the base horizontally at the front of the vertical axis of the drilling rig, and adjust the screw until the inclination meter Indicates that the inclination angle of the active drill rod passing through the longitudinal axis of the base along the vertical plane is α; the number of turns N ₁ of the rotating screw can be estimated by the formula: Among them, α is the maximum inclination angle of the drilling rig, β is the adjustable inclination angle of the longitudinal axis of the base when the screw rotates one circle, X is the pitch of the screw, and L is the distance between the front and rear screws of the base;

(5) After adjusting the active drill pipe to the specified inclination angle α, the lock nut is engaged with the base and fixed, and the screw rod is locked by radial bolts;

(6) Driven active drill pipe, coring barrel and drill bit are installed, and the drill rig drives the drilling tool to drill obliquely into the large-diameter cast-in-place pile;

(7) After the drilling tool is drilled until the length of the core sample is the depth _L5 of the coring barrel, stop drilling; lift the drilling tool through the winch system, loosen the connection between the active drill pipe and the driven drill pipe, and use the drilling rig The low-speed high-torque reverse gear completely unloads the active drill pipe and the driven drill pipe; the screw rod at the base of the drilling rig drives the drill to move backward along the slide rail, and the hoisting system takes out the driven drill pipe and takes out the core sample;

(8) Use the hoist to reconnect the driven drill pipe of appropriate length and put it into the drill hole, the screw rod drives the drill to move forward along the slide rail, connect the active drill pipe and the driven drill pipe, and start the drill to take core samples;

(9) Steps (7), (8) are repeated until the core-pulling sampling of the whole pile is completed.

Further, in the step (5), the bottom of the lock nut is provided with fixed teeth, and the position of the base mounting screw is provided with a locking seat that cooperates with the fixed teeth of the lock nut.

Further, in the step (3), the included angle θ ₂ of the horizontal axis along the vertical plane is eliminated, and the screw rod of the support c is adjusted through the suspended support b, so that the inclinometer indicates that the active drill rod passes through the base horizontal axis along the vertical plane. The inclination angle is 0; the step (4) eliminates the vertical axis angle θ ₁ along the vertical plane, and adjusts the screw rod of the support a through the suspended support b, so that the inclinometer indicates that the active drill rod passes through the base longitudinal axis along the vertical plane. The inclination angle in the plane is α.

Compared with the prior art, the beneficial effects of the utility model are:

The utility model adopts the screw to adjust the inclination angle of the drilling rig, and the spherical groove of the foot support cooperates with the spherical end of the bottom of the bolt, which has strong adaptability to the site and can adjust the inclination angle of the drilling rig with high precision. Move back and forth along the guide rail, so that the drilling rig can be fully close to the column (wall), and it is convenient to load and unload drill pipes. The height of the tower is suitable for low spaces such as basements. The space can also complete the complete core sample extraction of the cast-in-place pile foundation. The utility model has the advantages of simple structure, convenient operation and installation, safety and reliability, and can well carry out the work of extracting core samples of cast-in-situ piles of existing buildings.

Description of drawings

Below in conjunction with accompanying drawing, the specific embodiment of the present utility model is described in further detail, wherein:

Fig. 1 is the front view of the complete set of equipment for core drilling detection of large-diameter cast-in-place piles under existing buildings described in the utility model;

Fig. 2 is the top view of the complete set of equipment for core drilling detection of large-diameter cast-in-situ piles under existing buildings described in the utility model;

Fig. 3 is a schematic diagram of the active drill pipe inclination angle of the complete set of equipment for core-drilling detection of large-diameter cast-in-place piles under existing buildings according to the utility model;

Fig. 4 is a schematic diagram of the base structure of the complete set of equipment for core-drilling detection of large-diameter cast-in-situ piles under existing buildings described in the utility model.

In the figure: 1-drilling machine, 2-tower, 21-bracket, 22-support rod, 3-base, 31-lock seat, 4-base screw, 5-guide rail, 6-lock nut, 61-fix Teeth, 62-bolt hole, 7-screw, 71-ball end, 72-locking plane, 8-foot support, 81-inner concave spherical groove, 9-locking bolt, 10-inclinometer, 11 -circular level, 12-hoisting system, 13-steel wire rope, 14-drill pipe, 15-cast-in-place pile, 16-wall, 17-inlet pipe.

Detailed ways

The preferred embodiments of the present utility model are described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described here are only used to illustrate and explain the present utility model, and are not intended to limit the present utility model.

As shown in Figures 1 to 4, the complete set of equipment for core-drilling detection of large-diameter cast-in-place piles under existing buildings according to the present invention includes a base 3, a drilling rig and a hoisting system 12 arranged on the base 3, the described The winch system 12 includes a winch arranged on the drilling rig and a tower 2 hinged on the base, and the wire rope 13 of the winch is connected with the drilling tool 14 of the drilling rig through the fixed pulley on the tower 2 .

The drilling rig is equipped with a low-speed high-torque reverse gear; the drilling rig is a vertical shaft rotary drilling rig, which drives the drilling tool to rotate.

Described drilling tool 14 comprises driving drill rod, some driven drill rods that enter in borehole, coring barrel and drill bit, and described active drill rod and driven drill rod are connected by screw thread, and described active drill rod is connected by the described active drill rod. The drilling rig is driven by a vertical shaft, the driving drill rod is provided with a through-hole, and the drilling rig is also provided with a water inlet pipe 17, and the water inlet pipe 17 is connected with the through-hole of the driving drill rod. The length L ₃ of the active drill rod 141 ≤ U-L' ₁ -L ₂ , when opening the hole, the sum of the length of the core barrel and the length of the drill bit L ₄ ≤ L'₁; each drilling depth K ≤ UL ₁ -L ₂ , during normal drilling and coring, the length of the core barrel is L ₅ ≥ K, and the length of the driven drill pipe is an integer multiple of the secondary footage during the designed normal drilling, where U is the height of the working space , L ₁ is the height of the top of the rig head from the ground, L ₁ ' is the height of the bottom of the rig head from the ground, and L ₂ is the distance between the water inlet pipe and the active drill pipe joint.

As shown in Figure 4, the base 3 is provided with an adjustment mechanism for adjusting the inclination angle of the base 3, and the adjustment mechanism includes a bolt hole arranged on the base 3, a screw rod 7 matched with the bolt hole and a lock for fixing the screw rod 7 Tightening mechanism, the bottom of the screw 7 is a spherical end 71, the other end is provided with a locking plane 72, the cross-section of which is polygonal, the bottom of the screw 7 is provided with a foot support 8 cooperating with its spherical shape 71, the bottom The foot support 8 is provided with a concave spherical groove 81 that matches the bottom spherical shape 71 of the screw rod 7 .

The locking mechanism includes a locking seat 31 arranged on the base 3 corresponding to the bolt hole and a locking nut 6 cooperating with the locking seat 31. The locking seat 31 is provided with positioning teeth, and the locking seat 31 is provided with positioning teeth. The nut 6 is provided with a fixed tooth 61 cooperating with the positioning teeth, and the lock nut 6 is provided with a mounting hole for the passage of the screw rod, the cross section of the mounting hole matches the cross section of the screw rod 7, and the lock nut 6 Bolt holes 62 are arranged in the upper radial direction, and locking bolts 9 are arranged on the bolt holes 62. The locking bolts 9 compress the locking plane 72 of the screw rod 7 to prevent the screw rod 7 from rotating radially. Since the cross-section of the mounting hole matches the cross-section of the screw rod 7, the rotating lock nut 6 adjusts the rotation of the screw rod 7 to make the base tilt or level. The positioning teeth on the 31 are meshed, and then the screw rod 7 is locked by the radial locking bolt 9.

Described base 3 is provided with guide rail 5, and base 3 is also provided with base screw mandrel 4, and base screw mandrel 4 is connected with driving motor, and base screw mandrel 4 is connected with drilling machine head 1, and under the effect of driving motor, base screw mandrel 4 Drive the bull head 1 of the drilling rig to move back and forth along the guide rail 5 .

A circular level 11 is also arranged horizontally on the base 3 for detecting the horizontal state of the base 3 .

The tower 2 includes a bracket 21 and a support rod 22. One end of the bracket 21 is hinged to the base 3, and the other end is provided with a fixed pulley. The two ends of the bracket 21 form an included angle of 90° to 170°. The support rod 22 is hinged to the base 3, and the other end is hinged to the bracket 21.

A method for performing core-drilling detection on large-diameter cast-in-situ piles under existing buildings, comprising the following steps:

(1) Install the drilling rig so that the opening position is as close as possible to the column (wall) above the pile top, and determine the maximum value of the inclination angle α required for drilling, where D is the diameter of the pile, d is the distance between the center of the borehole and the edge of the pile, H is the length of the pile, and h is the height of the cap. When it is located within the top surface of the pile, the drilling inclination angle can be reduced as appropriate.

(2) Adjust the screw rods 7 on the base, and observe the circular level 11 at the same time, so that the air bubbles are centered, so as to achieve the purpose of leveling the base. Let the initial inclination angle of the active drill pipe be θ at this time, and when it passes through the vertical axis of the base, it will The inclination angle in the vertical plane is θ ₁ , and the inclination angle in the vertical plane passing through the transverse axis of the base is θ ₂ .

(3) First eliminate the included angle θ ₂ of the drilling tool 14 on the vertical plane of the horizontal axis, place the inclinometer 10 vertically on the base on the side of the vertical axis of the drilling rig, suspend the support b, and adjust the screw 7 of the support c until the inclinometer 10 indicates that the inclination angle of the active drill rod in the vertical plane passing through the base transverse axis is 0. The number of turns N ₂ of the rotating support c screw can be estimated by the formula: Among them, δ is the adjustable inclination angle of the horizontal axis of the base when the screw rotates one revolution, X is the pitch of the screw, and B is the distance between the horizontal axis of the base and the screw.

(4) Secondly, eliminate the included angle θ ₁ of the drilling tool on the vertical axis of the vertical axis, and adjust the active drill pipe 14 to the required inclination angle α, place the inclinometer 10 horizontally on the position where the base is located in front of the vertical axis of the drilling rig, and the suspended support b , adjust the screw 7 of the support a until the inclinometer 10 indicates that the inclination angle of the active drill rod in the vertical plane passing through the longitudinal axis of the base is α. The number of turns N ₁ of the screw of the rotating support a can be estimated by the formula: Among them, α is the maximum inclination angle of the drill head 1, β is the adjustable inclination angle of the longitudinal axis of the base when the screw rotates one revolution, X is the pitch of the screw 7, and L is the distance between the front and rear screws of the base.

(5) After adjusting the active drill pipe to the specified inclination angle α, the screw rod 7 is locked through the lock nut 6, and the fixed teeth 61 at the bottom of the lock nut 6 mesh with the positioning teeth of the lock seat 31. A mounting hole for cooperating with the screw rod 7 is provided, and the cross section of the mounting hole matches the cross section of the screw rod 7. A locking plane 72 is provided at the end of the screw rod 7 that cooperates with the lock nut 6, and a fixed tooth is provided at the bottom of the lock nut 6. 61, the base 3 is provided with a locking seat 31 that cooperates with the fixed teeth 61, and the screw 7 is fixed by the locking bolt 9 on the radial bolt hole 62 of the locking nut 6 to prevent the screw 7 from rotating radially;

(6) Install the active drill pipe, the coring barrel and the drill bit, and the bull head 1 of the drilling rig drives the drilling tool to drill obliquely into the large-diameter cast-in-situ pile 15 .

(7) After the drilling tool is drilled until the length of the core sample reaches the depth _L5 of the core barrel, stop drilling, and after the active drill pipe stroke reaches K, use the hydraulic pressure of the drilling rig to lift the drilling tool 14, and use the ratchet wrench to loosen the active drill The connection between the rod and the driven drill rod, and then use the low-speed high-torque reverse gear of the drill head 1 to completely disassemble the active drill rod and the driven drill rod. The screw rod 4 at the base of the drilling rig drives the bull head 1 of the drilling rig to move backward along the slide rail, and the winch system 12 takes out the drilling tool 14 and takes out the core sample.

(8) Use the hoist to re-connect the drilling tool with a suitable length and put it into the drilling hole. The screw rod 4 drives the drill head 1 to move forward along the slide rail, connect the active drill pipe and the driven drill pipe, and start the drill to drill core samples.

(9) Steps (7) and (8) are repeated until the core-pulling sampling work of the whole pile is completed.

The utility model can extract core samples in a relatively small space, has a small and simple structure, is convenient to operate and install, is safe and reliable, and can well carry out the core-pulling work of the cast-in-place piles of existing buildings.

For other structures of the system for extracting core samples from cast-in-place piles in existing buildings described in this embodiment, refer to the prior art.

The above is only a preferred embodiment of the utility model, and does not limit the utility model in any form, so if it does not depart from the technical solution content of the utility model, the above embodiments are made according to the technical essence of the utility model Any amendments, equivalent changes and modifications still belong to the scope of the technical solution of the present utility model.

Claims (7)

1. one kind is carried out a complete set of equipment of drilling core checking to large-section in-situ concrete pile under existing building, comprise base, rig and hoisting system, it is characterized in that: described rig is provided with drilling tool, described drilling tool comprises kelly and for entering driven drilling rod, coring tube and the drill bit in boring, and described hoisting system comprises and is hinged on pylon on base and hoist engine; Described base is provided with the governor motion regulating its angle of inclination, described base both sides are provided with guide rail, described base is also provided with the base screw mandrel for mobile drill, described base screw mandrel one end is connected with drive motors, and described base screw mandrel drives rig along slide.

2. according to claim 1 large-section in-situ concrete pile under existing building is carried out to a complete set of equipment of drilling core checking, it is characterized in that: described governor motion comprises the adjusting bolt hole be arranged on base, the screw rod coordinated with adjusting bolt hole and the retaining mechanism for tie down screw; The bottom of described screw rod is spheric end, is provided with the footing bearing coordinated with described spheric end bottom described screw rod, and described footing bearing settlement has the indent spherical groove coordinated with described spheric end.

3. according to claim 2 large-section in-situ concrete pile under existing building is carried out to a complete set of equipment of drilling core checking, it is characterized in that: described retaining mechanism comprises the locking nut being arranged on locking bed corresponding with adjusting bolt hole on base and coordinating with described locking bed, described locking nut is provided with the installing hole installing screw rod, one end that described screw rod coordinates with the installing hole of locking nut is provided with locking plane, match with the cross section of screw rod in the cross section of described installing hole, described locking bed is provided with positioning tooth, described locking nut is provided with the fixed teeth coordinated with the positioning tooth of described locking bed, described locking nut radial direction is provided with bolt hole, described bolt hole is provided with lock bolt.

4. according to claim 2 large-section in-situ concrete pile under existing building is carried out to a complete set of equipment of drilling core checking, it is characterized in that: described rig is provided with the slow-speed of revolution high torque reversal shelves.

5. according to claim 1 large-section in-situ concrete pile under existing building is carried out to a complete set of equipment of drilling core checking, it is characterized in that: described kelly length L ₃≤ U-L' ₁-L ₂, during perforate, perforate coring tube length and the length of the bit sum L ₄≤ L' ₁; Each round trip drilling depth K≤U-L ₁-L ₂, when normally creeping into, described coring tube length L ₅>=K, described driven run of steel is design the integral multiple of footage per round trip when normally creeping into, and wherein U is working space height, L ₁for rig ox head top terrain clearance, L ₁' be height liftoff bottom rig ox head, L ₂for water inlet pipe and kelly joint distance.

6. according to claim 1 large-section in-situ concrete pile under existing building being carried out to a complete set of equipment of drilling core checking, it is characterized in that: described base being provided with the inclinator for measuring rig vertical shaft angle of slope.

7. large-section in-situ concrete pile under existing building is carried out to a complete set of equipment of drilling core checking according to any one of Claims 1-4, it is characterized in that: described base is provided with circular bubble.