CN109339126B - Pile forming simulation device for indoor solidified pile body - Google Patents

Abstract

The invention discloses a pile-forming simulation device for indoor solidified piles, comprising a bracket, a stirring part, a test box part and a material injection pump; the test box part is located at the inner lower part of the bracket, the stirring part is located at the upper part of the test box part, The bracket includes bracket I, bracket II, bracket III, limit pipe, and support rod. The stirring components include grouting pipe, trifurcated pipe, rocker, handle, drill pipe, blade, shotcrete port and drill bit. The test box components include test box, more than one clamp, base, the invention is small in size, can practically simulate the solidification of the pile body in engineering practice, and can be carried out indoors. The invention solves the difficulties that the solidified pile body needs many materials, the equipment is bulky, and the environment is easily polluted in engineering practice, and a better curing agent formula can be developed through the device. The design defects caused by insufficient data to the engineering design are reduced.

Description

A pile-forming simulation device for indoor solidified piles

technical field

The invention relates to a pile-forming simulation device for indoor solidified pile bodies, belonging to the field of geotechnical engineering.

Background technique

Various soft soils are widely distributed in my country, and their main characteristics are high natural moisture content, high compressibility, low shear strength, low water permeability, thixotropy and rheology. Soft soil has significant structure, once disturbed, its strength is significantly reduced, and it has obvious rheological properties, which can produce large secondary consolidation settlement. Buildings on soft soil foundations have a large amount of settlement and a long period of settlement stability. The engineering properties of soft soil are quite special. If it is not handled or handled improperly during construction, a series of problems such as building cracking, building collapse, and building tilting caused by the settlement of building foundations will often occur, which seriously threatens people's Therefore, the solidification of soft soil foundation is particularly important.

Due to the large amount of curing agent required for soft soil curing in actual engineering, the strength of the final cured soft soil is not easy to predict and determine, the soft soil with insufficient strength after curing is not easy to rework, and the curing agent formula is not suitable. In order to better develop a curing agent and construction process more suitable for soft soil curing, and to predict the strength of soft soil after curing in advance, we urgently need a pile-forming simulation device for indoor curing of piles.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide a piling simulation device for indoor solidified piles, so as to solve the problems of inappropriate solidifying agent and construction technology for soft soil solidification in engineering practice, and to predict information such as the strength of soft soil after solidification in advance, so that the engineering The actual data is more abundant.

The technical scheme of the present invention is: a pile-forming simulation device for indoor solidified piles, comprising a bracket, a stirring part, a test box part and an injection pump;

The bracket includes a bracket I, a bracket II, a bracket III, a limit tube, and a support rod. Both the bracket I and the bracket III are hollow cuboid structures, and the bracket II is located between the bracket I and the bracket III. II includes 4 inclined rods, the four inclined rods respectively fixedly connect the four vertices at the top of the bracket I and the four vertices at the bottom of the bracket III, and the horizontal and vertical directions of the upper and lower surfaces of the cuboid structure of the bracket III are respectively. Two support rods are fixed, and the intersection of the two horizontal and two vertical fixed support rods is a rectangular gap, the limit tube is a hollow cylindrical tube, and the top and bottom ends of the limit tube are respectively fixed on the bracket III cuboid At the intersection of the horizontal and vertical fixed support rods on the upper and lower surfaces of the structure, the cleaning plate is installed in the bracket II;

The stirring part includes a grouting pipe, a trifurcated pipe, a rocker, a handle, a drill pipe, a blade, a spray port and a drill bit; the drill pipe is sleeved in the limit pipe, and the top of the drill pipe passes through the top of the limit pipe It is connected with the bottom of the grouting pipe through the trifork pipe, the top of the trifork pipe is connected with the bottom of the grouting pipe, the bottom of the trifork pipe is connected with the top of the drill pipe, and the side of the trifork pipe is connected with one end of the rocker. The handle is sleeved on the outside of the other end of the rocker, the top of the grouting pipe is connected to the grouting pump, the bottom end of the drill pipe passes through the limit pipe, the cleaning plate and extends into the test box in turn, and the bottom end of the drill pipe is connected to the test box. The drill bit is connected, the drill pipe and the drill bit are hollow inside, the bottom of the drill bit is provided with a shotcrete port, the lower part of the drill bit is provided with a blade, and the blade is located above the shotcrete port;

The test box components include a test box, one or more clamps, and a base; the test box is installed under the stirring part, the test box is a cylindrical structure without a top cover and a bottom, and the sides of the test box are two. The side walls of the semi-cylindrical body are obtained by splicing the side walls of the cylinder, the side of the test box is provided with a drain hole, the outer side of the test box is provided with more than one clamp, and the lower end of the test box is fixed on the base.

The lower part of the drill bit is provided with two rows of blades, each row includes two blades, each blade is perpendicular to the drill rod, and the cross section of each blade forms an angle of 45° with the drill rod.

The bottom end of the drill bit is conical.

A clamp is also provided on the outer surface of the base.

The rocker is provided with a protrusion for limiting the up and down displacement of the handle.

The cleaning plate is used to clean mud and slurries from the drill pipe.

The limit pipe ensures the up and down movement of the drill pipe in the vertical direction.

The top of the trifork pipe and the bottom of the grouting pipe are detachably connected, and the bottom of the trifork pipe and the top of the drill pipe are detachably connected.

The beneficial effects of the present invention are:

(1) The present invention solves the problem of unsuitable curing agent and construction technology for soft soil solidification in engineering practice, and predicts information such as the strength of soft soil after solidification in advance, so that the data in engineering practice is more sufficient.

(2) The present invention provides a large amount of reliable data for engineering practice, and greatly reduces the design defects caused by insufficient data to the engineering design.

(3) The small size of the present invention can realistically simulate the solidified pile body in engineering practice, and can be carried out indoors.

(4) The present invention solves the difficulties that the solidified pile body needs many materials, the equipment is bulky, and the environment is easily polluted in engineering practice, and a better curing agent formula is developed through this device.

Description of drawings

Fig. 1 is the side view of the device of the present invention;

Fig. 2 is the top view of the bracket of the present invention;

Fig. 3 is the side view of the test chamber of the present invention;

Fig. 4 is the side view of the stirring member of the present invention;

Fig. 5 is the front view of the drill bit of the present invention;

Each label in the figure: 1-support I; 2-support II; 3-support III; 4-drill; 5-oblique rod; 6-limiting pipe; 7-support rod; 8-cleaning plate; 9-grouting pipe ; 10- fork pipe; 11- rocker; 12- handle; 13- drill pipe; 14- blade; 15- spray port; 16- test box; 17- drain hole; 18- clamp; 19- base .

Detailed ways

The present invention will be further described below with reference to the accompanying drawings and embodiments, but the content of the present invention is not limited to the scope.

Embodiment 1: As shown in Figures 1 to 5, a piling simulation device for indoor solidified piles includes a bracket, a stirring part, a test box part and an injection pump;

The brackets include brackets I1, brackets II2, brackets III3, limit tubes 6, and support rods 7. The brackets I1 and brackets III3 are both hollow cuboid structures, and the brackets II2 are located between the brackets I1 and the brackets III3. The bracket II2 includes four oblique rods 5, which respectively connect the four vertices at the top of the bracket I1 with the four vertices at the bottom of the bracket III3, and the horizontal direction of the upper and lower surfaces of the cuboid structure of the bracket III3 2. Two support rods 7 are fixed vertically respectively, and the intersection of the two horizontal and two vertically fixed support rods 7 is a rectangular gap, the limit tube 6 is a hollow cylindrical tube, and the top of the limit tube 6, The bottom ends are respectively fixed at the intersection of the horizontally and vertically fixed support rods 7 on the upper and lower surfaces of the cuboid structure of the bracket III3, and the cleaning plate 8 is installed in the bracket II2;

The stirring component includes a grouting pipe 9, a trifurcated pipe 10, a rocker 11, a handle 12, a drill pipe 13, a blade 14, a spray port 15 and a drill bit 4; the drill pipe 13 is sheathed in the limit pipe 6, The top of the drill pipe 13 passes through the top of the limit pipe 6 and communicates with the bottom of the grouting pipe 9 through the branch pipe 10. The top of the branch pipe 10 communicates with the bottom of the grouting pipe 9. The top of the drill pipe 13 is connected, the side of the trifurcated pipe 10 is connected to one end of the rocker 11, the handle 12 is sleeved on the outside of the other end of the rocker 11, the top of the grouting pipe 9 is communicated with the grouting pump, and the drill pipe 13 The bottom end of the drill rod 13 is connected to the drill bit 4 through the limit pipe 6 and the cleaning plate 8 and extends into the test box 16. The drill rod 13 and the drill bit 4 are hollow inside, and the bottom of the drill bit 4 There are two jetting ports 15, the lower part of the drill bit 4 is provided with a blade 14, and the blade 14 is located above the jetting port 15;

The test box components include a test box 16, three clamps 18, and a base 19; the test box 16 is installed under the stirring part, the test box 16 is a cylindrical structure without a top cover and a bottom, and the test box 16 The side of the test box 16 is a cylindrical side obtained by splicing two semi-cylindrical side walls, the side of the test box 16 is provided with a drain hole 17, the outer side of the test box 16 is provided with three clamps 18, and the lower end of the test box 16 is fixed. on the base 19.

The lower part of the drill bit 4 is provided with two rows of blades 14 , each row includes two blades 14 , each blade 14 is perpendicular to the drill rod 13 , and the cross section of each blade 14 forms an angle of 45° with the drill rod 13 .

The bottom end of the drill bit 4 is conical.

A clamp 18 is also provided on the outer surface of the base 19 .

Embodiment 2: The structure of this embodiment is the same as that of Embodiment 1, the difference is that the rocker 11 is provided with a protrusion, which is used to limit the up and down displacement of the handle.

The specific operation steps of the pile-forming simulation device of the indoor solidified pile body of the present embodiment are as follows:

Place the test box on the base 19, hoop the clamp 18, cut out a sufficient amount of soil samples from the undisturbed soil sample and place them in the test box 16 for layering and compaction according to the needs of the project, adjust the position of the base 19 and the drill bit 20, determine For the hole position (1, 2, 3), write the chain number (1, 2, 3), the hole number (1, 2, 3), and the serial number (1, 2, 3);

Mixing pile construction: set out the "1" pile position, and determine the specific pile position; drill bit 4 is in place, check the length of the drill pipe 13 and the diameter of the drill bit 4, move the drill bit 4 to the designated position to align the pile position, and the drill bit 4 reaches the calibration hole After positioning, align, level and correct the verticality to ensure that the drill bit 4 and the drill pipe 13 are at 90 degrees to the ground, and ensure that the pile verticality error is within 1.0%; check and level the drill bit 4 and the drill pipe 13; stir the curing agent , Mix the curing agent according to the technical parameters, the curing agent should be fully stirred evenly, pour the slurry into the injection pump before grouting, and connect the injection pump to the grouting pipe 9; drilling to the design depth in a positive circulation, hold the handle 12. Rotate the rocker 11 to make the drill bit 4 cut the soil along the limit pipe 6, stir and sink; turn on the injection pump; reverse circulation while spraying and lift it to 0.05m above the design pile surface, after the drill bit 4 sinks to the design depth, Turn on the injection pump, and keep its outlet pressure at 0.4-0.6Mpa, so that the curing agent is continuously injected, and the speed of the drill bit 4 is controlled. When the lifting reaches the design elevation, it should be stopped and stirred for a few seconds to ensure that the pile head is uniform and compact; repeat When drilling under stirring, in order to fully mix the solidifying agent sprayed into the soil with the soil, repeat the stirring and sinking until the required depth is reached, then stir and lift, and re-spray along the pile body in a range of 0.05 meters up and down the lower part. After the construction is completed, inject an appropriate amount of water into the injection pump, turn on the injection pump, clean the residual curing agent in the pipeline, and remove the soil adhered to the drill bit 4 at the same time; reverse the circulation to lift the drill to the surface of the pile top and then lift the ground; the pile formation is completed;

The construction of "2" and "3" mixing piles is the same as the construction of "1" mixing piles.

The grouting of the pile should be done in one go without interruption. Each pile should be filled with grouting once and sprayed and stirred.

When the slurry is stopped for some reason during the construction process, it is advisable to sink the mixer to 5cm below the slurry stop point, restore the slurry supply, and then stir and lift. The construction process of "three sprays and three stirrings" is adopted during mixing.

Three sprays and three stirrings: drill down and spray, lift up, repeat once to complete three sprays.

When the device is in operation, hold the handle 12 and rotate the rocker 11 to make the drill bit 4 cut and agitate and sink (or rise) along the limit pipe 6 . And the forward and reverse circulation of the drill 4. The curing agent is pumped into the test chamber 16 from the grouting pipe 9 , the drill pipe 13 and the drill bit 4 by the injection pump. The hole position can be changed by moving the position of the base 19 .

The specific embodiments of the present invention have been described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above-mentioned embodiments, and can also be made within the scope of knowledge possessed by those of ordinary skill in the art without departing from the purpose of the present invention. Various changes.

Claims (5)

1. A pile-forming simulation device for an indoor solidified pile body is characterized by comprising a support, a stirring part, a test box part and a material injection pump;

the support comprises a support I (1), a support II (2), a support III (3), a limiting pipe (6) and support rods (7), wherein the support I (1) and the support III (3) are hollow cuboid structures, the support II (2) is located between the support I (1) and the support III (3), the support II (2) comprises 4 inclined rods (5), the 4 inclined rods (5) respectively fixedly connect four top points at the top of the support I (1) with four top points at the bottom of the support III (3), the two support rods (7) are respectively fixed on the upper surface and the lower surface of the cuboid structure of the support III (3) in the horizontal and vertical directions, the intersection of the two horizontal and vertical fixed support rods (7) is a rectangular gap, the limiting pipe (6) is a hollow cylindrical pipe, and the top end and the bottom end of the limiting pipe (6) are respectively fixed on the cuboid structure of the support III (3), The cleaning plate (8) is arranged in the bracket II (2) at the intersection of the supporting rods (7) which are fixed transversely and vertically on the lower surface;

the stirring component comprises a grouting pipe (9), a three-branch pipe (10), a rocker (11), a handle (12), a drill rod (13), blades (14), a guniting port (15) and a drill bit (4); the drilling rod (13) is sleeved in the limiting pipe (6), the top end of the drilling rod (13) penetrates through the top end of the limiting pipe (6) and is communicated with the bottom of the grouting pipe (9) through the Y-pipe (10), the top of the Y-pipe (10) is communicated with the bottom of the grouting pipe (9), the bottom of the Y-pipe (10) is communicated with the top of the drilling rod (13), the side face of the Y-pipe (10) is connected with one end of the rocker (11), the handle (12) is sleeved on the outer side of the other end of the rocker (11), the top of the grouting pipe (9) is communicated with a grouting pump, the bottom end of the drilling rod (13) sequentially penetrates through the limiting pipe (6) and the cleaning plate (8) and extends into the test box (16), the bottom end of the drilling rod (13) is connected with the drill bit (4), the drilling rod (13) and the drill bit (4) are hollow, the bottom of the drill bit (4) is provided with a grouting port (15), and the lower part of the, the blade (14) is positioned above the guniting port (15);

the test box component comprises a test box (16), more than one clamp (18) and a base (19); the test box (16) is installed below the stirring component, the test box (16) is of a cylinder structure without a top cover and a bottom, the side face of the test box (16) is a cylinder side face obtained by splicing two semi-cylinder side walls, a water drainage hole (17) is formed in the side face of the test box (16), more than one hoop (18) is arranged on the outer side face of the test box (16), and the lower end of the test box (16) is fixed on a base (19).

2. The pile-forming simulation device for the indoor solidified pile body of claim 1, wherein: two rows of blades (14) are arranged at the lower part of the drill bit (4), each row comprises two blades (14), each blade (14) is perpendicular to the drill rod (13), and the cross section of each blade (14) forms an angle of 45 degrees with the drill rod (13).

3. The pile-forming simulation device for the indoor solidified pile body of claim 1, wherein: the bottom end of the drill bit (4) is conical.

4. The pile-forming simulation device for the indoor solidified pile body of claim 1, wherein: the outer surface of the base (19) is also provided with a clamp (18).

5. The pile-forming simulation device for the indoor solidified pile body of claim 1, wherein: the rocker (11) is provided with a bulge.

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