CN110067267A - Load the whirl spraying steel pipe combination stake simulating lab test device and method of various modes - Google Patents
Load the whirl spraying steel pipe combination stake simulating lab test device and method of various modes Download PDFInfo
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- CN110067267A CN110067267A CN201910397990.XA CN201910397990A CN110067267A CN 110067267 A CN110067267 A CN 110067267A CN 201910397990 A CN201910397990 A CN 201910397990A CN 110067267 A CN110067267 A CN 110067267A
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 109
- 239000010959 steel Substances 0.000 title claims abstract description 109
- 238000005507 spraying Methods 0.000 title claims abstract description 17
- 238000000034 method Methods 0.000 title claims abstract description 16
- 238000009533 lab test Methods 0.000 title description 2
- 229910000754 Wrought iron Inorganic materials 0.000 claims abstract description 89
- 239000004568 cement Substances 0.000 claims abstract description 84
- 230000007704 transition Effects 0.000 claims abstract description 61
- 230000006835 compression Effects 0.000 claims abstract description 49
- 238000007906 compression Methods 0.000 claims abstract description 49
- 239000011888 foil Substances 0.000 claims abstract description 36
- 238000006073 displacement reaction Methods 0.000 claims abstract description 30
- 238000004088 simulation Methods 0.000 claims abstract description 17
- 238000002474 experimental method Methods 0.000 claims abstract description 16
- 230000002093 peripheral effect Effects 0.000 claims abstract description 10
- 230000007423 decrease Effects 0.000 claims abstract description 5
- 239000002689 soil Substances 0.000 claims description 32
- 238000012545 processing Methods 0.000 claims description 8
- 239000004576 sand Substances 0.000 claims description 6
- 230000003447 ipsilateral effect Effects 0.000 claims description 3
- 239000010721 machine oil Substances 0.000 claims description 3
- 238000012423 maintenance Methods 0.000 claims description 3
- 238000003825 pressing Methods 0.000 claims description 3
- 230000000630 rising effect Effects 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 2
- 239000000203 mixture Substances 0.000 abstract description 2
- 238000010276 construction Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 238000009434 installation Methods 0.000 description 3
- 238000005259 measurement Methods 0.000 description 3
- 240000002853 Nelumbo nucifera Species 0.000 description 2
- 235000006508 Nelumbo nucifera Nutrition 0.000 description 2
- 235000006510 Nelumbo pentapetala Nutrition 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000012937 correction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 235000000396 iron Nutrition 0.000 description 1
- 230000008447 perception Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D33/00—Testing foundations or foundation structures
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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Piles And Underground Anchors (AREA)
- Placing Or Removing Of Piles Or Sheet Piles, Or Accessories Thereof (AREA)
Abstract
The present invention discloses a kind of pair of whirl spraying steel pipe combination stake indoor simulation and loads the experimental provision and experimental method of a variety of load modes, the device include for simulating the rod iron of miniature steel pipe pile, cement earth pile and shell for simulating rotary churning pile, foil gauge is posted in the side of rod iron and cement earth pile；Compression bar, the first drag-line, counterweight, leads power block, transition bracket, pressure sensor and First Transition steel plate composition vertical compression charging assembly at briquetting；The key of this method is: pressure sensor obtains compressive load, and dial gauge obtains decline displacement, and then obtains stake top and push load and displacement curve；The each foil gauge for being mounted on rod iron side can obtain the ess-strain value of different depth on rod iron and cement earth pile interface；The each foil gauge for being mounted on cement earth pile side can obtain the ess-strain value of different depth on cement earth pile and pile peripheral earth interface.The device and method can simulate the ess-strain situation of two interfaces, and size is small, convenient for disposed within.
Description
Technical field
It is especially that a kind of pair of rotary churning pile-is miniature the present invention relates to the pile foundation load test technical field in civil engineering
The assembly indoor simulation of steel-pipe pile and the experimental provision and method for loading a variety of load modes.
Background technique
Rotary churning pile-miniature steel pipe pile assembly is a kind of new pile foundation form occurred in stiffening basic ground engineering,
Abbreviation whirl spraying steel pipe combination stake in the application, the pile-type are mainly used for preventing and treating building settlement correction.Its work progress substantially,
First construction soil cement high-pressure rotary jet grouting pile is inserted into miniature steel pipe pile after initial set.Since whirl spraying steel pipe combination stake is by two kinds of piles with different
Type is composed, and power transmission mechanism has differences with traditional pile-type naturally, therefore needs to load it load of multiple directions, to survey
Vertical displacement amount under different load modes, horizontal displacement, on different type pile interface different depth measurement point stress
The parameters such as strain value carry out comprehensive analysis to its working mechanism and stress performance to establish model, are subsequent reality
Construction and design application provide foundation.
The conventional thinking for carrying out load loading experiment is to carry out the simulation of construction site, i.e., reaction frame and just is arranged on ground
Reversed installation jack, driving jack pair miniature steel pipe pile upper end apply lower pressure or uplift force or horizontal direction installation thousand
Jin top makes it provide horizontal thrust to miniature steel pipe pile side, and sets up dial framework installation dial gauge on ground, and make dial gauge
Contact is resisted against stake top or stake side, to obtain vertical displacement amount, horizontal displacement etc.；And steel-pipe pile is inserted into pre-hardening soil cement
Before, muti-piece foil gauge first is sticked in each height in steel-pipe pile surface, in this way, tester can be according to each after being further applied load
The strain value of measurement point converses the stress value of different height on miniature steel pipe pile and rotary churning pile interface, and is based on above-mentioned difference
The stress value analysis of height converses the numerical value such as side friction, moment of flexure, establishes overall model.
However, the simulated experiment of above-mentioned construction site have the following deficiencies: firstly, above-mentioned experiment can only obtain steel-pipe pile with
Ess-strain situation on rotary churning pile interface, and the ess-strain situation of rotary churning pile and soil body interface is answered due to being difficult to lay
Become piece and can not obtain, the data of ess-strain acquire imperfect, the subsequent pile body stress distribution curve thus established, pile body axis
The models such as power distribution curve are naturally also not perfect, it is difficult to accurately react the working mechanism of its stress transmitting.Moreover, scene is real
It tests, pile body size is big, and experimental situation is complicated, and experiment condition is poor, cumbersome laborious.
Summary of the invention
The invention solves a technical problem be to provide one kind and can simulate steel-pipe pile and rotary churning pile interface and rotation
The ess-strain situation of stake and soil body interface is sprayed, and reduces overall dimensions, convenient for disposed within and easy to operate to whirl spraying
Steel pipe combination stake indoor simulation and the experimental provision for loading a variety of load modes.
A technical solution of the invention is to provide a kind of pair of whirl spraying steel pipe combination stake indoor simulation and loads a variety of
The experimental provision of load mode,
It include for simulating the rod iron of miniature steel pipe pile, the shell of the cement earth pile for simulating rotary churning pile and upper opening
Body,
Muti-piece foil gauge is posted in the side of rod iron, and muti-piece foil gauge is also posted in the side of cement earth pile；
Shell is made of four blocks of steel side plates and one piece of bottom plate, and left steel side plate is equipped with a steel column, is cut with scissors on the steel column
It is connected to compression bar, compression bar middle section is equipped with briquetting, and lateral adjustment device is equipped between compression bar and briquetting；The non-articulated end of compression bar is equipped with
Via hole, via hole are equipped with the first drag-line, and the first drag-line bottom end is equipped with counterweight；
The experimental provision further includes leading power block, leads power block and passes through for adjusting the transition bracket and steel for leading power block horizontal direction position
Side plate connection；Lead power block top surface be equipped be used for and briquetting against upper hemisphere, lead power block bottom equipped with lower hemisphere；
It is removable at the top of rod iron to be connected with First Transition steel plate, it is shelved on First Transition steel plate for against lower hemisphere
Pressure sensor；Steel side plate is adsorbed with magnet stand, and magnet stand is equipped with vertical dial gauge, and the contact of dial gauge is pressed in
On First Transition steel plate；
Above-mentioned compression bar, the first drag-line, counterweight, leads power block, transition bracket, pressure sensor and First Transition steel at briquetting
Plate constitutes vertical compression charging assembly.
The invention solves another technical problem be to provide one kind can simulate steel-pipe pile and rotary churning pile interface and
The ess-strain situation of rotary churning pile and soil body interface, and overall dimensions are reduced, convenient for disposed within and easy to operate to rotation
Spray the experimental method of steel pipe combination stake indoor simulation.
Another technical solution of the invention is to provide the experiment side of a kind of pair of whirl spraying steel pipe combination stake indoor simulation
Method, step include:
Pvc pipe is half-and-half splitted and smears machine oil to inside pipe wall, the PVC that the soil cement being stirred filling two halves are splitted
Pipe posts muti-piece foil gauge, and the rod iron top stretching soil cement by rod iron main body embedment soil cement in the side of a rod iron,
Two pvc pipes partly splitted are re-closed again, maintenance of then vibrating, the demoulding after soil cement is stiff, and in the side of cement earth pile
The a lot of block foil gauges of face paste, form cement earth pile-rod iron assembly；
It is laid with sand bedding course in shell and inserts weak soil, vertical hole is then dug in weak soil, combines cement earth pile-rod iron
Body is placed in vertical hole, and shelves pressing plate to the gap back-up sand between vertical hole and cement earth pile, then on weak soil surface, perpendicular to it
It is pressed downward keeping weak soil closely knit；
Dial gauge and vertical compression charging assembly are installed on shell, apply vertical pushing load to it；
Pressure sensor can obtain cement earth pile-rod iron assembly compressive load, and dial gauge can obtain cement earth pile-
Two parameters are reported and carry out data processing to master controller by the decline displacement of rod iron assembly, to obtain stake top pushing
Load and displacement curve；
The each foil gauge for being mounted on rod iron side can obtain the stress of different depth on rod iron and cement earth pile interface
Strain value；The each foil gauge for being mounted on cement earth pile side can obtain different depth on cement earth pile and pile peripheral earth interface
Ess-strain value.
The present invention compared with prior art, has following the experimental provision and method of whirl spraying steel pipe combination stake indoor simulation
Remarkable advantage and beneficial effect.
Firstly, successfully being realized with the cement earth pile of small size-rod iron assembly to large-sized rotary churning pile-miniature steel pipe
The indoor simulation of the assembly of stake improves the intensity and performance of cement earth pile especially by the height-regulating ratio of mud, keeps it very big
Degree has approached the mechanical property of rotary churning pile, and has selected intensity and hardness and the close solid rod iron of miniature steel pipe pile, in turn
Ensure the reasonability and accuracy simulated；Moreover, said combination body overall dimensions significantly reduce, operation indoor convenient for merging
It is convenient；Moreover it can be bonded foil gauge in stiff cement earth pile side, cement earth pile and soil can not be known by compensating for the prior art
The defect of the ess-strain situation of body interface, that is to say, that being capable of complete perception rod iron and cement earth pile and cement earth pile
With the ess-strain situation of two interfaces of pile peripheral earth, it is ensured that data acquisition is complete, establishes complete two points so as to subsequent
The pile body stress distribution curve and pile shaft force distribution curve model at interface, and then more perfect reflect pile body stress transmitting
Mechanism；Moreover, above-mentioned briquetting and lead power block be adjustable lateral position and the two lateral adjustments in place after and can be held firmly in place,
Ensure briquetting, lead power block and be respectively positioned on right above rod iron, and two hemispheroidal presence up and down due to leading power block, it is ensured that any feelings
Pressure is all stable delivery straight down under condition；It is undersized which solves rod irons, and the problem that jack can not load makes
It obtains on the metastable disc for acting on rod iron top 10mm diameter of vertical load essence, and ensures that the reading of pressure sensor can essence
The size of the quasi- reaction practical Compression of assembly；And the First Transition steel plate for the magnet stand and rod iron top added, it is ensured that
Dial gauge can precisely react the decline displacement of assembly, obtain accurately pile top load and sinking displacement curve convenient for the later period.
Lateral adjustment device between compression bar and briquetting is preferably that compression bar middle section is equipped with the first lateral long hole, and briquetting is equipped with
First circular hole, briquetting and compression bar pass through the bolt locking across the first lateral long hole and the first circular hole；In this way, unscrewing bolt, so that it may
Easily to adjust the lateral position of briquetting, it is ensured that it is located at right above rod iron, screwing bolts, so that it may lock the transverse direction of briquetting
Position, unstability when avoiding being pressurized.
Transition bracket is preferably that it includes two transition beams and two screw rods, and every transition beam both ends are welded with one end respectively
Plate, each end plate are equipped with second circular hole, and left steel side plate is equipped with corresponding two second lateral long holes, also sets on the steel plate of right side
There are a corresponding two second lateral long holes, every piece of end plate and ipsilateral side steel plate are passed through across the second lateral long hole and the second circular hole
Bolt locking；It is set on every transition beam there are two third transverse direction long hole, every screw rod both ends pass through two of two transition beams the
It three lateral long holes and is locked by nut；Two screw rods and two transition beams form groined type, the box banding among the groined type
Lead power block；In this way, passing through the second lateral long hole and bolt, so that it may the x of flexible modulation two end plates and two transition beams to position and
Spacing, by the third transverse direction long hole and screw rod of transition beam can flexible modulation two screw rods y to position and spacing so that two
Root screw rod and two transition beams form groined types, and power block is led in internal orifice clamping, while also achieving to leading power block lateral position
It adjusts.
Preferably, the experimental provision includes the second drag-line；
A steel column also is provided on right steel side plate, which is equipped with third circular hole, and right section of compression bar is equipped with the
Four circular holes, compression bar is horizontally disposed and right section of compression bar and right side steel column are passed through and locked across the bolt of third circular hole and the 4th circular hole,
The via hole of compression bar right end is bolted with avris fixed pulley；
The lateral long hole of the first of compression bar middle section has been bolted central fixed pulley, is equipped with dynamic slide below the first lateral long hole
Wheel, the second drag-line principal piece head end are fixed with the first lateral long hole, the second drag-line principal piece successively bypass movable pulley, center fixed pulley and
Avris fixed pulley, the second drag-line principal piece tail end are equipped with tension sensor, and tension sensor is through the second drag-line secondary segment and with reconnection；
Removable at the top of rod iron to be connected with the second transition steel plate, the second transition steel plate is equipped with the extension hooked with movable pulley
Part；The contact of dial gauge is pressed in the second transition steel plate；
Above-mentioned the second drag-line, avris fixed pulley, central fixed pulley, movable pulley, counterweight, tension sensor and the second transition
Steel plate constitutes vertically pulling-resistant charging assembly.
The operating process of above-mentioned experimental provision are as follows:
Vertically pulling-resistant charging assembly is installed on shell, applies vertical uplift load to it；
Twice of the reading of tension sensor is cement earth pile-rod iron assembly uplift force load, and dial gauge can obtain
Cement earth pile-rod iron assembly rising displacement is taken, two parameters are reported and carry out data processing to master controller, to obtain
Obtain stake top uplift load and displacement curve；
The each foil gauge for being mounted on rod iron side can obtain the stress of different depth on rod iron and cement earth pile interface
Strain value；The each foil gauge for being mounted on cement earth pile side can obtain different depth on cement earth pile and pile peripheral earth interface
Ess-strain value.
Above-mentioned apparatus and method, gain effect are as follows: central fixed pulley is installed using the existing first lateral long hole, utilizes pressure
The existing via hole of bar right end installs avris fixed pulley, utilizes existing magnet stand and dial gauge, enhancing structure utilization rate, an object
It is dual-purpose；And pulley blocks are laid rationally, and the lateral position of central fixed pulley is adjusted using the first lateral long hole, movable pulley is made to be located at steel
Right above stick, guarantee vertical pull-up, to ensure tension sensor measurement precisely, and utilizes movable pulley, keep tension load double；It is complete
U.S.A solves the problems, such as to apply uplift load at the top of the rod iron to small size.
As further preferably, which further includes third drag-line, the 4th drag-line and the 5th drag-line；
A piece steel column is connected with horizontally upper dial gauge and lower dial gauge through upper and lower two magnet stands respectively, up and down
Head end of the contact of two dial gauges respectively with third drag-line and the 4th drag-line is fixed, and the tail end of third drag-line and the 4th drag-line is equal
Rod iron is entangled through rope sling；
Another steel column is equipped with vertical long hole, and vertical long hole has been bolted commutation fixed pulley, the 5th drag-line master
Duan Shouduan entangles rod iron through rope sling, and the 5th drag-line principal piece is equipped with pull sensing around commutation fixed pulley, the 5th drag-line principal piece tail end
Device, tension sensor is through the 5th drag-line secondary segment and with reconnection；
Above-mentioned third drag-line, the 4th drag-line, the 5th drag-line, commutation fixed pulley, tension sensor and with being reconstructed into level
Charging assembly.
The operating process of above-mentioned experimental provision are as follows: upper dial gauge, lower dial gauge and horizontal addload group are installed on shell
Part applies lateral pull load to it；
Tension sensor can obtain cement earth pile-rod iron assembly lateral pull load, and upper dial gauge can obtain rod iron
The upper horizontal displacement at top, lower dial gauge can obtain the lower horizontal displacement of rod iron upper section, by above three parameter report to
Master controller carries out data processing, to obtain horizontal loading and pile body drift angle curve；
The each foil gauge for being mounted on rod iron side can obtain compression-side and tension side on rod iron and cement earth pile interface
Different depth ess-strain value；The each foil gauge for being mounted on cement earth pile side can obtain cement earth pile and pile peripheral earth
The ess-strain value of the different depth of tension side and compression-side on interface.
Above-mentioned apparatus and method, gain effect are as follows: using two dial gauges and drag-line of different height, precisely measure up and down
Two specific horizontal displacements, and the average value of two displacements are exactly the average level displacement of assembly, and utilize two
The level error and difference in height of a displacement are divided by, so that it may be obtained the drift angle of rod iron, and then be obtained horizontal loading and drift angle curve；
The problem to the rod iron horizontal addload of microsize has been solved perfectly in above structure.
Detailed description of the invention
Fig. 1 is the positive structure diagram of the vertical compression charging assembly of experimental provision of the invention.
Fig. 2 is the configuration schematic diagram of the vertical compression charging assembly of experimental provision of the invention.
Fig. 3 is the positive structure diagram of the vertically pulling-resistant charging assembly of experimental provision of the invention.
Fig. 4 is the positive structure diagram of the horizontal addload component of experimental provision of the invention.
As shown in the figure 1, rod iron, 2, cement earth pile, 3, shell, 3.1, steel side plate, 4, steel column, 5, compression bar, 6, briquetting, 7,
Via hole, the 8, first drag-line, 9, counterweight, 10, lead power block, 11, upper hemisphere, 12, lower hemisphere, 13, First Transition steel plate, 14,
First lateral long hole, the 15, first circular hole, 16, transition beam, 17, screw rod, 18, end plate, the 19, second circular hole, 20, second is laterally long
Hole, 21, third transverse direction long hole, the 22, second drag-line, 23, third circular hole, the 24, the 4th circular hole, 25, avris fixed pulley, 26, center
Fixed pulley, 27, movable pulley, 28, tension sensor, the 29, second transition steel plate, 30, pendant, 31, dial gauge, 32, third drag-line,
33, the 4th drag-line, the 34, the 5th drag-line, 35, magnet stand, 36, vertical long hole, 37, commutation fixed pulley, 38, inner thread sleeve,
39, pressure sensor.
Specific embodiment
The present invention will be further explained below with reference to the attached drawings and specific examples.
As shown in Figure 1, Figure 2, Figure 3, Figure 4, the present invention to whirl spraying steel pipe combination stake indoor simulation and loads a variety of load moulds
The experimental provision of formula, it include for simulating the rod iron 1 of miniature steel pipe pile, the cement earth pile 2 for simulating rotary churning pile and top
The shell 3 of opening.
Muti-piece foil gauge is posted in the side of rod iron 1, and muti-piece foil gauge is also posted in the side of cement earth pile 2.
Shell 3 is made of four blocks of steel side plates 3.1 and one piece of bottom plate, and left steel side plate 3.1 is equipped with a steel column 4, certainly,
The steel column 4 may be also secured on right, forward and backward three blocks of steel side plates 3.1.Be hinged with compression bar 5 on the steel column 4, compression bar 5 it is non-
Hinged end is equipped with via hole 7, and via hole 7 is equipped with the first drag-line 8, and 8 bottom end of the first drag-line is equipped with counterweight 9.5 middle section of compression bar is equipped with pressure
Block 6 is equipped with lateral adjustment device between compression bar 5 and briquetting 6；Specifically, 5 middle section of compression bar is equipped with the first lateral long hole 14, pressure
Block 6 is equipped with the first circular hole 15, briquetting 6 and compression bar 5 through the bolt locking across the first lateral long hole 14 and the first circular hole 15.
The experimental provision further includes leading power block 10, lead 10 top surface of power block be equipped with for briquetting 6 against upper hemisphere 11,
10 bottom of power block is led equipped with lower hemisphere 12.Power block 10 is led through for adjusting transition bracket and a left side for leading 10 horizontal direction position of power block
Right two steel side plates 3.1 connect.Specifically, transition bracket includes two transition beams 16 and two screw rods 17, every transition beam
16 both ends are welded with end plate 18 respectively, and each end plate 18 is equipped with second circular hole 19, and left steel side plate 3.1 is equipped with corresponding two
Second lateral long hole 20 also is provided with corresponding two second lateral long holes 20, every piece of end plate 18 and ipsilateral side on the steel plate of right side
Steel plate passes through the bolt locking across the second lateral long hole 20 and the second circular hole 19；Third is lateral there are two setting on every transition beam 16
Long hole 21, every 17 both ends of screw rod pass through two third transverse direction long holes 21 of two transition beams 16 and are locked by nut；Two spiral shells
Bar 17 and two transition beams 16 form groined type, and the box banding among the groined type leads power block 10.Certainly, above-mentioned transition bracket
It can also be connect with former and later two steel side plates 3.1.
The top of rod iron 1 is removable to be connected with First Transition steel plate 13, specifically, is equipped with external screw thread at the top of rod iron 1, and first
13 bottom surface of transition steel plate is welded with inner thread sleeve 38, and inner thread sleeve 38 is screwed with 1 tip male thread of rod iron.
It is shelved on First Transition steel plate 13 for the pressure sensor 39 against lower hemisphere 12；Steel side plate 3.1 adsorbs
Be magnetic dial framework 35, and magnet stand 35 is equipped with vertical dial gauge 31, and the contact of dial gauge 31 is pressed in First Transition steel plate 13
On.
Above-mentioned compression bar 5, the first drag-line 8, counterweight 9, leads power block 10, transition bracket, pressure sensor 39 and at briquetting 6
One transition steel plate 13 constitutes vertical compression charging assembly.
The experimental provision further includes the second drag-line 22.
A steel column 4 also is provided on right steel side plate 3.1, which is equipped with third circular hole 23, the right side of compression bar 5
Section is equipped with the 4th circular hole 24, and compression bar 5 is horizontally disposed and 5 right sections of compression bar and right side steel column 4 are through across third circular hole 23 and the 4th
The bolt of circular hole 24 is locked, and the via hole 7 of 5 right end of compression bar is bolted with avris fixed pulley 25.
The lateral long hole 14 of the first of 5 middle section of compression bar has been bolted central fixed pulley 26, the first lateral 14 lower section of long hole
Equipped with movable pulley 27,22 principal piece head end of the second drag-line and the first lateral long hole 14 are fixed, and 22 principal piece of the second drag-line successively bypasses dynamic
Pulley 27, central fixed pulley 26 and avris fixed pulley 25,22 principal piece tail end of the second drag-line are equipped with tension sensor 28, pull sensing
Device 28 is connect through 22 secondary segment of the second drag-line with counterweight 9.
1 top of rod iron is removable to be connected with the second transition steel plate 29, i.e. 29 bottom surface of the second transition steel plate is again provided with and steel
The inner thread sleeve 38 that 1 tip male thread of stick screws.
Second transition steel plate 29 is equipped with the pendant 30 hooked with movable pulley 27；Such as on movable pulley 27 be equipped with link and
Second transition steel plate, 29 top surface welding hook.
The contact of dial gauge 31 is pressed in the second transition steel plate 29.
Above-mentioned the second drag-line 22, avris fixed pulley 25, central fixed pulley 26, movable pulley 27, counterweight 9, tension sensor
28 and second transition steel plate 29 constitute vertically pulling-resistant charging assembly.
The experimental provision further includes third drag-line 32, the 4th drag-line 33 and the 5th drag-line 34.
A piece steel column 4 in left side is connected with through upper and lower two magnet stands 35 horizontally goes up dial gauge 31 under respectively
Dial gauge 31, head end of the contact of upper and lower two dial gauges 31 respectively with third drag-line 32 and the 4th drag-line 33 are fixed, and third is drawn
The tail end of rope 32 and the 4th drag-line 33 entangles rod iron 1 through rope sling.
A piece steel column 4 on right side is equipped with vertical long hole 36, and vertical long hole 36 has been bolted commutation fixed pulley 37,
5th drag-line, 34 principal piece head end entangles rod iron 1 through rope sling, and for 34 principal piece of the 5th drag-line around commutation fixed pulley 37, the 5th drag-line 34 is main
Section tail end is equipped with tension sensor 28, and tension sensor 28 is connect through 34 secondary segment of the 5th drag-line with counterweight 9.5th drag-line 34 is located at
Between 33 height of third drag-line 32 and the 4th drag-line.
Above-mentioned third drag-line 32, the 4th drag-line 33, the 5th drag-line 34, commutation fixed pulley 37, tension sensor 28 and match
Weigh 9 composition horizontal addload components.
As shown in Figure 1, Figure 2, Figure 3, Figure 4, to whirl spraying steel pipe combination stake indoor simulation and a variety of lotuses are loaded using the present invention
The method that the experimental provision of load mode is tested, step include.
Pvc pipe is half-and-half splitted and smears machine oil to inside pipe wall, the PVC that the soil cement being stirred filling two halves are splitted
Pipe posts muti-piece foil gauge, and 1 top of the rod iron stretching cement by 1 main body of rod iron embedment soil cement in the side of a rod iron 1
Soil, then two pvc pipes partly splitted are re-closed, maintenance of then vibrating, the demoulding after soil cement is stiff, and in cement earth pile 2
Side post muti-piece foil gauge, form 1 assembly of cement earth pile 2- rod iron.
It is laid with sand bedding course in shell 3 and inserts weak soil, vertical hole is then dug in weak soil, by cement earth pile 2- rod iron 1
Assembly is placed in vertical hole, and shelves pressing plate to the gap back-up sand between vertical hole and cement earth pile 2, then on weak soil surface,
Keep weak soil closely knit its vertical pushing.
Dial gauge 31 and vertical compression charging assembly are installed on shell 3, apply vertical pushing load to it.
Pressure sensor 39 can obtain the compressive load of 1 assembly of cement earth pile 2- rod iron, and dial gauge 31 can obtain water
Two parameters are reported and carry out data processing to master controller, to obtain by the decline displacement of 1 assembly of soil stake 2- rod iron
Stake top pushes load and displacement curve.
The each foil gauge for being mounted on 1 side of rod iron can obtain rod iron 1 and answer with different depth on 2 interface of cement earth pile
Stress-strain value；Being mounted on each foil gauge of 2 side of cement earth pile, to obtain cement earth pile 2 different from pile peripheral earth interface
The ess-strain value of depth.It specifically, is exactly to be answered using the strain value of each foil gauge multiplied by Hooke coefficient with obtaining it
Force value.And subtracted each other according to the stress value of different height, the side friction of the pile body of this section of height is obtained, the side of different height is utilized
Frictional resistance, further analysis obtains pile body axle power, etc..
The experimental method is further comprising the steps of.
Vertically pulling-resistant charging assembly is installed on shell 3, applies vertical uplift load to it；
Twice of the reading of tension sensor 28 is the uplift force load of 1 assembly of cement earth pile 2- rod iron, and dial gauge
31 can obtain the rising displacement of 1 assembly of cement earth pile 2- rod iron, and two parameters are reported and are carried out at data to master controller
Reason, to obtain stake top uplift load and displacement curve；
The each foil gauge for being mounted on 1 side of rod iron can obtain rod iron 1 and answer with different depth on 2 interface of cement earth pile
Stress-strain value；Being mounted on each foil gauge of 2 side of cement earth pile, to obtain cement earth pile 2 different from pile peripheral earth interface
The ess-strain value of depth.
The experimental method is further comprising the steps of.
Upper dial gauge 31, lower dial gauge 31 and horizontal addload component are installed on shell 3, apply lateral pull lotus to it
It carries.
Tension sensor 28 can obtain the lateral pull load of 1 assembly of cement earth pile 2- rod iron, and upper dial gauge 31 can obtain
The upper horizontal displacement at 1 top of rod iron is taken, lower dial gauge 31 can obtain the lower horizontal displacement of 1 upper section of rod iron, by above three
Parameter, which is reported, carries out data processing to master controller, to obtain horizontal loading and pile body drift angle curve.
The each foil gauge for being mounted on 1 side of rod iron can obtain compression-side and tension on rod iron 1 and 2 interface of cement earth pile
The ess-strain value of the different depth of side；The each foil gauge for being mounted on 2 side of cement earth pile can obtain cement earth pile 2 and stake week
The ess-strain value of the different depth of tension side and compression-side on soil body interface.
Claims (8)
1. a kind of pair of whirl spraying steel pipe combination stake indoor simulation and the experimental provision for loading a variety of load modes, it is characterised in that: it
Shell including the rod iron (1) for simulating miniature steel pipe pile, cement earth pile (2) and upper opening for simulating rotary churning pile
(3),
Muti-piece foil gauge is posted in the side of rod iron (1), and muti-piece foil gauge is also posted in the side of cement earth pile (2)；
Shell (3) is made of four pieces of steel side plates (3.1) and one piece of bottom plate, and left steel side plate (3.1) is equipped with a steel column (4),
It is hinged with compression bar (5) on the steel column (4), compression bar (5) middle section is equipped with briquetting (6), is equipped between compression bar (5) and briquetting (6)
Lateral adjustment device；The non-articulated end of compression bar (5) is equipped with via hole (7), and via hole (7) is equipped with the first drag-line (8), the first drag-line
(8) bottom end is equipped with counterweight (9)；
The experimental provision further includes leading power block (10), leads power block (10) through for adjusting the transition for leading power block (10) horizontal direction position
Bracket is connect with steel side plate (3.1)；Lead power block (10) top surface be equipped with for briquetting (6) against upper hemisphere (11), lead power
Block (10) bottom is equipped with lower hemisphere (12)；
It is removable at the top of rod iron (1) to be connected with First Transition steel plate (13), be shelved on First Transition steel plate (13) for against
The pressure sensor (39) of lower hemisphere (12)；Steel side plate (3.1) is adsorbed with magnet stand (35), and magnet stand (35) is equipped with
Vertical dial gauge (31), the contact of dial gauge (31) are pressed on First Transition steel plate (13)；
Above-mentioned compression bar (5), the first drag-line (8), counterweight (9), leads power block (10), transition bracket, pressure sensor at briquetting (6)
(39) and First Transition steel plate (13) constitutes vertical compression charging assembly.
2. it is according to claim 1 to whirl spraying steel pipe combination stake indoor simulation and load a variety of load modes experiment fill
It sets, it is characterised in that: compression bar (5) middle section is equipped with the first lateral long hole (14), and briquetting (6) is equipped with the first circular hole (15), briquetting (6)
With compression bar (5) through the bolt locking across the first lateral long hole (14) and the first circular hole (15).
3. it is according to claim 1 to whirl spraying steel pipe combination stake indoor simulation and load a variety of load modes experiment fill
It sets, it is characterised in that: transition bracket includes two transition beam (16) He Lianggen screw rods (17), every transition beam (16) both ends difference
It is welded with end plate (18), each end plate (18) is equipped with second circular hole (19), and left steel side plate (3.1) is equipped with corresponding two the
Two lateral long holes (20), also are provided with corresponding two second lateral long holes (20) on the steel plate of right side, every piece of end plate (18) and ipsilateral
Side steel plate pass through the bolt across the second lateral long hole (20) and the second circular hole (19) and lock；Every transition beam (16) is equipped with two
A third transverse direction long hole (21), every screw rod (17) both ends pass through two third transverse direction long holes (21) of two transition beams (16) and
It is locked by nut；Two screw rod (17) He Lianggen transition beams (16) form groined type, and the box banding among the groined type leads power
Block (10).
4. it is according to claim 1 to whirl spraying steel pipe combination stake indoor simulation and load a variety of load modes experiment fill
It sets, it is characterised in that:
It includes the second drag-line (22)；
A steel column (4) also is provided on right steel side plate (3.1), which is equipped with third circular hole (23), compression bar
(5) right section is equipped with the 4th circular hole (24), and compression bar (5) is horizontally disposed and right section of compression bar (5) and right side steel column (4) are through across the
The locking of the bolt of three circular holes (23) and the 4th circular hole (24), the via hole (7) of compression bar (5) right end are bolted with avris fixed pulley (25)；
The lateral long hole (14) of the first of compression bar (5) middle section has been bolted central fixed pulley (26), the first lateral long hole (14)
Lower section is equipped with movable pulley (27), and the second drag-line (22) principal piece head end and the first lateral long hole (14) are fixed, and the second drag-line (22) is main
Duan Yici is equipped with around movable pulley (27), central fixed pulley (26) and avris fixed pulley (25), the second drag-line (22) principal piece tail end
Tension sensor (28), tension sensor (28) are connect through the second drag-line (22) secondary segment with counterweight (9)；
Removable at the top of rod iron (1) to be connected with the second transition steel plate (29), the second transition steel plate (29) is equipped with and movable pulley
(27) pendant (30) hooked；The contact of dial gauge (31) is pressed on the second transition steel plate (29)；
Above-mentioned the second drag-line (22), avris fixed pulley (25), central fixed pulley (26), movable pulley (27), counterweight (9), pulling force
Sensor (28) and the second transition steel plate (29) constitute vertically pulling-resistant charging assembly.
5. it is according to claim 4 to whirl spraying steel pipe combination stake indoor simulation and load a variety of load modes experiment fill
It sets, it is characterised in that: it includes third drag-line (32), the 4th drag-line (33) and the 5th drag-line (34)；
A piece steel column (4) is connected with horizontally upper dial gauge (31) and lower percentage through upper and lower two magnet stands (35) respectively
Table (31), head end of the contact of upper and lower two dial gauges (31) respectively with third drag-line (32) and the 4th drag-line (33) are fixed, the
The tail end of three drag-lines (32) and the 4th drag-line (33) entangles rod iron (1) through rope sling；
Another steel column (4) is equipped with vertical long hole (36), and vertical long hole (36) has been bolted commutation fixed pulley (37),
5th drag-line (34) principal piece head end entangles rod iron (1) through rope sling, and the 5th drag-line (34) principal piece, which bypasses, to commutate fixed pulley (37), and the 5th
Drag-line (34) principal piece tail end is equipped with tension sensor (28), and tension sensor (28) is through the 5th drag-line (34) secondary segment and counterweight (9)
Connection；
Above-mentioned third drag-line (32), the 4th drag-line (33), the 5th drag-line (34), commutation fixed pulley (37), tension sensor
(28) and counterweight (9) constitutes horizontal addload component.
6. to whirl spraying steel pipe combination stake indoor simulation and loading the realities of a variety of load modes using described in any one of 1~5
The method that experiment device is tested, it is characterised in that: its step includes:
Pvc pipe is half-and-half splitted and smears machine oil to inside pipe wall, the pvc pipe that the soil cement being stirred filling two halves are splitted,
The side of a piece rod iron (1) posts muti-piece foil gauge, and rod iron (1) the top stretching water by rod iron (1) main body embedment soil cement
Soil, then two pvc pipes partly splitted are re-closed, maintenance of then vibrating, the demoulding after soil cement is stiff, and in cement earth pile
(2) side posts muti-piece foil gauge, forms cement earth pile (2)-rod iron (1) assembly；
It is laid with sand bedding course in shell (3) and inserts weak soil, vertical hole is then dug in weak soil, by cement earth pile (2)-rod iron
(1) assembly is placed in vertical hole, and is shelved to the gap back-up sand between vertical hole and cement earth pile (2), then on weak soil surface
Pressing plate keeps weak soil closely knit its vertical pushing；
Dial gauge (31) and vertical compression charging assembly are installed on shell (3), apply vertical pushing load to it；
Pressure sensor (39) can obtain cement earth pile (2)-rod iron (1) assembly compressive load, and dial gauge (31) can obtain
Cement earth pile (2)-rod iron (1) assembly decline displacement is taken, two parameters are reported and carry out data processing to master controller,
Load and displacement curve are pushed to obtain stake top；
The each foil gauge for being mounted on rod iron (1) side can obtain different depth on rod iron (1) and cement earth pile (2) interface
Ess-strain value；The each foil gauge for being mounted on cement earth pile (2) side can obtain cement earth pile (2) and pile peripheral earth interface
The ess-strain value of upper different depth.
7. the method for experiment according to claim 6, it is characterised in that:
Vertically pulling-resistant charging assembly is installed on shell (3), applies vertical uplift load to it；
Twice of the reading of tension sensor (28) is the uplift force load of cement earth pile (2)-rod iron (1) assembly, and percentage
Table (31) can obtain cement earth pile (2)-rod iron (1) assembly rising displacement, by two parameters report to master controller into
Row data processing, to obtain stake top uplift load and displacement curve；
The each foil gauge for being mounted on rod iron (1) side can obtain different depth on rod iron (1) and cement earth pile (2) interface
Ess-strain value；The each foil gauge for being mounted on cement earth pile (2) side can obtain cement earth pile (2) and pile peripheral earth interface
The ess-strain value of upper different depth.
8. the method for experiment according to claim 6, it is characterised in that:
Upper dial gauge (31), lower dial gauge (31) and horizontal addload component are installed on shell (3), and lateral pull is applied to it
Load；
Tension sensor (28) can obtain cement earth pile (2)-rod iron (1) assembly lateral pull load, upper dial gauge (31)
The upper horizontal displacement at the top of rod iron (1) can be obtained, lower dial gauge (31) can obtain the lower horizontal displacement of rod iron (1) upper section,
Above three parameter is reported and carries out data processing to master controller, to obtain horizontal loading and pile body drift angle curve；
Be mounted on rod iron (1) side each foil gauge can obtain on rod iron (1) and cement earth pile (2) interface compression-side and by
Draw the ess-strain value of the different depth of side；The each foil gauge for being mounted on cement earth pile (2) side can obtain cement earth pile (2)
With the ess-strain value of the different depth of tension side and compression-side on pile peripheral earth interface.
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