CN111198096A - Soil anchor rod drawing test device and test method considering grouting pressure - Google Patents
Soil anchor rod drawing test device and test method considering grouting pressure Download PDFInfo
- Publication number
- CN111198096A CN111198096A CN201911250894.9A CN201911250894A CN111198096A CN 111198096 A CN111198096 A CN 111198096A CN 201911250894 A CN201911250894 A CN 201911250894A CN 111198096 A CN111198096 A CN 111198096A
- Authority
- CN
- China
- Prior art keywords
- grouting
- sample
- test
- soil
- slurry
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M13/00—Testing of machine parts
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
- G01N1/286—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q involving mechanical work, e.g. chopping, disintegrating, compacting, homogenising
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
- G01N1/36—Embedding or analogous mounting of samples
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/08—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0014—Type of force applied
- G01N2203/0016—Tensile or compressive
- G01N2203/0017—Tensile
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/025—Geometry of the test
- G01N2203/0252—Monoaxial, i.e. the forces being applied along a single axis of the specimen
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/06—Indicating or recording means; Sensing means
- G01N2203/067—Parameter measured for estimating the property
- G01N2203/0676—Force, weight, load, energy, speed or acceleration
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Sampling And Sample Adjustment (AREA)
- Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The invention discloses a soil anchor rod drawing test device and a test method considering grouting pressure, wherein the test device comprises a test base, a sample base is arranged on the test base, a soil sample container for containing a test soil sample is arranged on the sample base, a sample upper cover/a sample cap is arranged at the upper end of the soil sample container, an electric lifting cylinder is arranged on the test base, a cross beam with a force sensor is arranged on the electric lifting cylinder, and the sensor is connected with a dowel bar/an anchor rod clamp. The test method comprises the following steps: preparing an indoor soil sample, installing the soil sample, installing a reinforcing steel bar, preparing anchoring body slurry, grouting the anchoring body, applying pressure to the slurry, performing a drawing test, disassembling a sample and a device, and cleaning the device. In the process of manufacturing the anchor rod sample indoors, the grouting pressure is considered, the seepage of slurry in a soil body and the compaction process in the grouting process can be well simulated, the grouting quality can be effectively controlled and monitored, and the method has the advantages of simplicity and convenience in test operation, small test error and the like.
Description
Technical Field
The invention belongs to the field of rock and soil anchoring engineering, and particularly relates to a soil anchor rod drawing test device and a test method considering grouting pressure.
Background
With the vigorous development of urban construction in China, the anchoring technology plays an important role in the supporting and reinforcing process of geotechnical engineering. The soil layer anchor rod has the advantages of short construction period, small pollution, low cost, high flexibility and the like, and is widely applied to the fields of buildings, municipal administration, water conservancy, traffic and the like.
The shear strength of the earth-earth interface of the earth anchor rod determines the anchoring capability of the anchoring system, and the grouting pressure has a great influence on the shear strength of the anchor-earth interface. If the soil body has bad cracks, the bad cracks can be continuously expanded when the grouting pressure is large, the soil body generates large deformation, and the anchoring effect is influenced; if the soil body is compact, and the grouting pressure is low, the permeability of the slurry is poor, and at the moment, the bonding strength of the slurry and the soil body cannot be ensured, so that the expected anchoring strength cannot be achieved.
If a field test is used for carrying out analysis and test on the anchoring performance of the anchor rod when the grouting pressure is changed, the problems of high test cost, poor repeatability operation, difficult control of field-independent factors and the like exist, the indoor test operation is relatively simple, the test variable is controllable, the interference of external factors is small, and the test variable can be randomly arranged. Based on the pertinence, a soil anchor rod drawing test device and a test method considering grouting pressure are provided.
Disclosure of Invention
The invention is provided for solving the problems in the prior art, and aims to provide a soil anchor rod drawing test device and a test method considering grouting pressure.
The technical scheme of the invention is as follows: the utility model provides a consider grouting pressure's soil property stock and draw testing arrangement, includes experimental frame, be provided with detachable sample base on the experimental frame, be provided with the soil sample container that holds experimental soil sample on the sample base, soil sample container upper end is provided with the sample upper cover at grouting in-process, and soil sample container upper end is provided with the sample cap drawing the test in-process, still be provided with on the experimental frame and carry out lift driven electric lift jar, be provided with the crossbeam on the electric lift jar, the crossbeam lower extreme is provided with force sensor, the sensor links to each other with the dowel steel at grouting in-process, and the sensor links to each other with the stock anchor clamps drawing the test in-process, be provided with the anchor preformed hole in the sample upper cover, anchor preformed hole department is provided with the plug that the slip casting was used.
Further, the plug links to each other with the slip casting hard tube, slurry flow rate regulator, slurry flow controller have set gradually on the slip casting hard tube, and slip casting hard tube tip inserts grouting pump department, the grouting pump is through fortune thick liquid pipe and storage thick liquid room intercommunication.
Furthermore, the slurry storage chamber is communicated with a cement mortar stirring box through a slurry outlet pipe, a material collecting box and a water collecting box are arranged on the cement mortar stirring box, an electric stirrer and a stirring chamber base are arranged in the cement mortar stirring box, and a pneumatic pump is further arranged on the cement mortar stirring box.
Furthermore, the cement mortar stirring box is also provided with a cleaning assembly, the cleaning assembly comprises a cleaning water pump communicated with the grout outlet pipe, and the water outlet end of the cleaning water pump is communicated with the water collecting tank through a cleaning water outlet pipe and a cleaning water outlet valve.
Furthermore, a waste recovery assembly is arranged at the grouting hard pipe and comprises a waste recovery pipe communicated with the grouting hard pipe, and the other end of the waste recovery pipe is communicated with the waste recovery chamber.
Furthermore, a grouting body is formed after grouting in the test soil sample, and a pressurizing block which is jacked upwards to pressurize the grouting body is arranged in the test machine base.
Furthermore, a steel bar fixing bracket for supporting the steel bar inserted into the test soil sample is arranged at the electric lifting cylinder.
A test method of a soil anchor rod drawing test device considering grouting pressure comprises the following steps:
preparation of an indoor soil sample
Assembling a sample bottom cover, a soil sample cavity and an anchoring body reserved steel pipe of a soil sample container, then preparing a sample by adopting a layered compaction method, and finally drawing out the anchoring body reserved steel pipe under the condition of ensuring the surface of the soil sample to be smooth and covering an upper sample cover;
ii, mounting a soil sample
Fixing a soil sample container filled with a test soil sample and a sample base on a test machine base by using a fixing bolt, and placing a latex film or filter paper around a central groove of the sample base;
iii-installing the reinforcing bar
Placing a rubber plug with a grouting hard tube at a preformed hole part of an anchoring body of an upper cover of a test sample; fixing the reinforcing steel bars by using a reinforcing steel bar fixing support, and finally sequentially installing a dowel bar and a force sensor on the upper part of the rubber plug and fixing the force sensor on the cross beam;
iv. preparation of anchor slurry
Opening a material conveying valve, pouring prepared sand and cement into a material collecting box in sequence, closing the material conveying valve after all the sand and the cement fall into a cement mortar stirring box, starting an electric stirring machine to stir the batch materials in the cement mortar stirring box to be uniform, closing the electric stirring machine, then pouring tap water with corresponding mass into a water collecting box, opening a water delivery valve, and closing the water delivery valve after all the water falls into the cement mortar stirring box; starting the electric stirrer again, continuously stirring for 10 minutes, finally opening a slurry outlet valve, and pressing cement mortar into the slurry storage chamber through a pneumatic pump;
v. grouting of anchoring body
Opening a first grouting valve, a grouting inlet valve, a grouting outlet valve and a second grouting valve during grouting, starting a grouting pump and a grouting pump, adjusting a slurry flow rate regulator and a slurry flow controller for grouting, after grouting is finished, pulling out a grouting hard pipe, inserting the grouting hard pipe into a waste recovery chamber, then inserting a telescopic vibrating rod for vibration compaction, and sealing a rubber plug after compaction is finished;
vi, pressure application of the slurry
The device is characterized in that a pressurizing block is started through a master control dial plate of the device to perform static pressurization on grouting bodies, a static pressure value is transmitted to a force sensor through a force transmission rod, when the static pressure value meets the requirement of a test, a system automatically stops pressurization and starts an automatic compensation mechanism, the system stands for 20min, the system ensures that the pressure applied to the grouting bodies is always kept at a set value, and then the system is closed;
vii drawing test
The method comprises the following steps of carrying out an indoor drawing test after a test piece reaches a maintenance age, firstly, sequentially disassembling a dowel bar, a steel bar fixing support, a rubber plug and a sample upper cover, simultaneously replacing the sample upper cover with a sample cap with a large central preformed hole, then, connecting a steel bar, an anchor rod clamp and a force sensor, adjusting an adjustable support to enable the steel bar to be just contacted with the anchor rod clamp, and carrying out the drawing test;
viii disassembling sample and device
Stopping the test after the sample is damaged, storing data, and disassembling the instrument components according to a correct sequence;
ix cleaning device
The device is integrally cleaned, so that the device is convenient to use in next test.
Preferably, a latex film or filter paper should be placed on the pressurizing block and the side wall of the prepared hole before grouting to prevent the slurry from bonding with the pressurizing block during the coagulation process.
Preferably, the bottom of the steel bar is flush with the upper part of the sample base, and the marking adjustment can be realized through a steel bar fixing support; and a part of the grouting material is poured during grouting, so that the formed anchoring body is prevented from being insufficient in height under the action of static pressure.
In the process of manufacturing the anchor rod sample indoors, the grouting pressure is considered, the penetration of slurry in a soil body in the grouting process can be well simulated, and the compaction process is realized, so that the indoor test is closer to the engineering practice. The grouting quality monitoring method can effectively control and monitor grouting quality, and has the advantages of simple and convenient test operation, small test error and the like. The anchor rod drawing test considering the grouting pressure has wide application range, and is also suitable for the seepage grouting of a sand layer, the compaction grouting of cohesive soil and the like.
Drawings
FIG. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is a schematic structural view of a soil sample cavity according to the present invention;
FIG. 3 is a schematic view of the construction of the circular compaction hammer of the present invention;
FIG. 4 is a schematic view showing the construction of a cement mortar mixing chamber according to the present invention;
FIG. 5 is a schematic view showing the connection of a slurry storage chamber according to the present invention;
FIG. 6 is a schematic view of the structure of a sample holder according to the present invention;
FIG. 7 is a side view of the circular compaction hammer of the present invention;
fig. 8 is a schematic structural view of a reinforcing bar fixing bracket according to the present invention;
FIG. 9 is a schematic view of the connection of the test stand according to the present invention;
FIG. 10 is a drawing schematic of the anchor rod clamp of the present invention;
wherein:
1 aggregate case 2 cement mortar agitator tank
3 electric mixer 4 mixing chamber base
5 pneumatic pump 6 water collecting tank
7 clean outlet valve 8 goes out thick liquid valve
9 play thick liquid pipe 10 washs outlet pipe
Clean water injection valve of 11 clean water pump 12
13 pulp storage chamber 14 vent hole
15 first slip casting valve 16 fortune thick liquid pipe
17 grouting pump and 18 grouting pump
19 slurry flow rate regulator 20 slurry flow controller
21 grouting hard pipe 22 waste recovery valve
23 waste recovery pipe 24 waste recovery chamber
25 second grouting valve 26 force sensor
27 dowel bar 28 steel bar fixing support
29 rubber plug 30 grouting body
31 reinforcing steel bar 32 fixing screw
33 sealing ring 34 soil sample container
35 test soil sample 36 fixing bolt
37 sample base 38 emulsion film or filter paper
39 pressurizing block 40 device master control dial plate
41 leveling nut 42 crossbeam
43 adjustable support 44 electric lifting cylinder
45 test stand 46 data connecting line
47 computer 48 anchor rod clamp
49 sample cap 50 telescopic vibrating rod
51 annular compaction hammer
1-1 material conveying pipe 1-2 material conveying valve
6-1 water delivery pipe 6-2 water delivery valve
18-1 pulp inlet valve 18-2 pulp outlet valve
34-1 sample bottom cover 34-2 soil sample cavity
34-3 sample upper cover 34-4 anchoring body reserved steel pipe
37-1 fool-proof buckle 37-2 central hole
48-1 are connected with the joint.
Detailed Description
The present invention is described in detail below with reference to the accompanying drawings and examples:
as shown in fig. 1 to 10, a soil anchor rod drawing test device considering grouting pressure comprises a test machine base 45, the test bed 45 is provided with a detachable sample base 37, the sample base 37 is provided with a soil sample container 34 for containing a test soil sample 35, the upper end of the soil sample container 34 is provided with a sample upper cover 34-3 in the grouting process, the upper end of the soil sample container 34 is provided with a sample cap 49 in the drawing test process, the test machine base 45 is also provided with an electric lifting cylinder 44 for lifting drive, the electric lifting cylinder 44 is provided with a beam 42, the lower end of the beam 42 is provided with a force sensor 26, the sensor 26 is connected with the dowel bar 27 during grouting, the sensor 26 is connected with the anchor rod clamp 48 during drawing test, an anchoring reserved hole is formed in the sample upper cover 34-3, and a rubber plug 29 for grouting is arranged at the anchoring reserved hole.
The plug 29 links to each other with the grout hard tube 21, set gradually slurry flow rate regulator 19, slurry flow controller 20 on the grout hard tube 21, grout pump 18 department is connected into to the 21 tip of grout hard tube, grout pump 18 communicates with storage slurry chamber 13 through fortune thick liquid pipe 16.
The slurry storage chamber 13 is communicated with a cement mortar stirring box 2 through a slurry outlet pipe 9, a material collecting box 1 and a water collecting box 6 are arranged on the cement mortar stirring box 2, an electric stirrer 3 and a stirring chamber base 4 are arranged in the cement mortar stirring box 2, and a pneumatic pump 5 is further arranged on the cement mortar stirring box 2.
The cement mortar stirring box 2 is further provided with a cleaning assembly, the cleaning assembly comprises a cleaning water pump 11 communicated with a grout outlet pipe 9, and the water outlet end of the cleaning water pump 11 is communicated with the water collecting tank 6 through a cleaning water outlet pipe 10 and a cleaning water outlet valve 7.
Slip casting hard tube 21 department still is provided with the waste recycling subassembly, the waste recycling subassembly includes the waste recycling pipe 23 with slip casting hard tube 21 intercommunication, the waste recycling pipe 23 other end and waste recycling room 24 intercommunication.
The test soil sample 35 is grouted to form a grouting body 30, and a pressurizing block 39 which jacks up to pressurize the grouting body 30 is arranged in the test machine base 45.
The electric lifting cylinder 44 is further provided with a steel bar fixing bracket 28 for supporting the steel bar 31 inserted into the test soil sample 35.
As shown in FIG. 2, the soil sample container 34 comprises a sample bottom cover 34-1, a soil sample cavity 34-2, a sample upper cover 34-3 and an anchor body reserved steel pipe 34-4, wherein the soil sample is filled in an annular space between the inner wall of the soil sample cavity 34-2 and the outer wall of the anchor body reserved steel pipe 34-4.
As shown in FIG. 3, the outer wall of the annular compaction hammer 51 slides along the inner wall of the soil sample cavity 34-2, the inner hole of the annular compaction hammer 51 is sleeved outside the reserved steel pipe 34-4 of the anchoring body to slide, and two holding parts can compact the soil sample layer by layer.
As shown in fig. 4, a delivery end of the collecting chamber 1 is provided with a delivery valve 1-2, a delivery end of the water collecting tank 6 is provided with a delivery valve 6-2, and a slurry outlet valve 8 is further arranged at the slurry outlet pipe 9, so that the output control of the slurry is facilitated.
As shown in fig. 5, a vent hole 14 is arranged at the top of the slurry storage chamber 13, a first grouting valve 15 is arranged at the output end of the slurry storage chamber 13, a slurry inlet valve 18-1 is arranged at the input end of the grouting pump 18, and a slurry outlet valve 18-2 is arranged at the output end of the grouting pump 18.
The grouting hard pipe 21 is provided with a second grouting valve 25, and the waste recovery pipe 23 is provided with a waste recovery valve 22.
As shown in fig. 6, a center hole 37-2 is formed in the middle of the sample base 37, and a through hole is formed in the outer circumference of the soil sample container 34 and fixed by a fixing bolt 36.
The mounting position of the sample base 37 and the test machine base 45 is also provided with a fool-proof buckle 37-1, so that the sample base 37 can be conveniently positioned and mounted.
A test method of a soil anchor rod drawing test device considering grouting pressure comprises the following steps:
preparation of an indoor soil sample
Assembling a sample bottom cover 34-1 of the soil sample container 34, a soil sample cavity 34-2 and an anchoring body reserved steel pipe 34-4, then preparing a sample by adopting a layered compaction method, finally drawing out the anchoring body reserved steel pipe 34-4 under the condition of ensuring the surface of the soil sample to be flat, and covering a sample upper cover 34-3;
ii, mounting a soil sample
Fixing a soil sample container 34 filled with a test soil sample and a sample base 37 on a test machine base 45 by using a fixing bolt 36, and placing an emulsion film or filter paper 38 around a central groove of the sample base 37;
iii-installing the reinforcing bar
Placing a rubber plug 29 with a grouting hard tube 21 at the position of a reserved hole of an anchoring body of the upper cover 34-3 of the sample; then, the reinforcing steel bar 31 is fixed by using a reinforcing steel bar fixing support 28, finally, the dowel bar 27 and the force sensor 26 are sequentially arranged on the upper part of the rubber plug 29, and the force sensor 26 is fixed on the cross beam 42;
iv. preparation of anchor slurry
Opening a material conveying valve 1-2, pouring prepared sand and cement into a material collecting box 1 in sequence, closing the material conveying valve 1-2 after all the sand and the cement fall into a cement mortar stirring box 2, starting an electric stirrer 3 to stir the batch materials in the cement mortar stirring box 2 to be uniform, closing the electric stirrer 3, then pouring tap water with corresponding mass into a water collecting box 6, opening a water delivery valve 6-2, and closing the water delivery valve 6-2 after all the water falls into the cement mortar stirring box 2; starting the electric stirrer 3 again, continuously stirring for 10 minutes, finally opening the slurry outlet valve 8, and pressing cement mortar into the slurry storage chamber 13 through the pneumatic pump 5;
v. grouting of anchoring body
When grouting, opening a first grouting valve 15, a grouting inlet valve 18-1, a grouting outlet valve 18-2 and a second grouting valve 25, starting a grouting pump 17 and a grouting pump 18, adjusting a slurry flow rate regulator 19 and a slurry flow controller 20 for grouting, after grouting is finished, pulling out a grouting hard pipe 21 and inserting the grouting hard pipe into a waste recovery chamber 24, then inserting a telescopic vibrating rod 50 for vibration compaction, and after compaction is finished, sealing a rubber plug 29;
vi, pressure application of the slurry
The device main control dial 40 starts the pressurizing block 39 to perform static pressurization on the grouting body 30, the static pressure value is transmitted to the force sensor 26 through the dowel bar 27, when the static pressure value meets the requirement of the test, the system automatically stops pressurization and starts an automatic compensation mechanism, the system stands for 20min, and the system ensures that the pressure applied to the grouting body 30 always keeps a set value and then is closed;
vii drawing test
After the test piece reaches the maintenance age, performing an indoor drawing test, firstly, sequentially disassembling the dowel bar 27, the steel bar fixing support 28, the rubber plug 29 and the sample upper cover 34-3, simultaneously replacing the sample upper cover 34-3 with a sample cap 49 with a larger central preformed hole, then connecting the steel bar 31, the anchor rod clamp 48 and the force sensor 26, and adjusting the adjustable support 43 to ensure that the steel bar 31 is just contacted with the anchor rod clamp 48 to perform the drawing test;
viii disassembling sample and device
Stopping the test after the sample is damaged, storing data, and disassembling the instrument components according to a correct sequence;
ix cleaning device
The device is integrally cleaned, so that the device is convenient to use in next test.
Before grouting, a latex film or filter paper 38 should be placed on the pressurizing block 39 and the side wall of the prepared hole to prevent the slurry from bonding with the pressurizing block 39 during the coagulation process.
The bottom of the steel bar 31 is flush with the upper part of the sample base 37, and the marking adjustment can be realized through the steel bar fixing support 28; and a part of the grouting material is poured during grouting, so that the formed anchoring body is prevented from being insufficient in height under the action of static pressure.
Example one
Preparation of an indoor soil sample
When a sample is manufactured, firstly, assembling a sample bottom cover 34-1, a soil sample cavity 34-2 and an anchoring body reserved steel pipe 34-4; secondly, after the compaction container is assembled, a layered compaction method is adopted, a set amount of soil is placed into the compaction container and compacted by using an annular compaction hammer 51, compaction is stopped after the set depth of current compaction is reached, and a hair scraping tool is used for scraping the surface of a compacted soil sample; and pouring a certain amount of soil, and repeating the operation until the preparation of the soil sample is finished. And finally, drawing out the anchoring body reserved steel pipe 34-4 under the condition of ensuring the surface of the soil sample to be flat, and covering the upper cover 34-3 of the sample. In addition, in order to ensure that the steel pipe 34-4 can be smoothly drawn out without damaging the soil sample, the outer wall of the reserved steel pipe 34-4 of the anchoring body is coated with proper vaseline before the soil sample compaction test is started.
Ii, mounting a soil sample
Emulsion film or filter paper 38 is placed around the pressurized part of the sample base 37 to avoid the slurry from being bonded with the sample base and influencing the test result; placing the soil sample on a sample base 37, and centering by using a fool-proof buckle 37-1 arranged between the sample base 37 and the soil sample cavity 34-2; after centering, the soil sample container 34, the sample base 37 and the press base 45 are tightly connected by the fixing bolt 36. Wherein, the size of the reserved holes of the sample upper cover 34-3 and the sample base 37 is consistent with the diameter of the anchoring body. In addition, the sample base 37 should be ensured to be dry and clean during the installation process of the soil sample.
Iii-installing the reinforcing bar
Firstly, a rubber plug 29 with a grouting hard tube 21 is placed at the position of the reserved hole of the anchor body of the sample upper cover 34-3. Secondly, the arrangement of inserting and fixing reinforcing bar 31, reinforcing bar fixed bolster 28 and plug 29 centre bore has guaranteed that reinforcing bar 31 is in vertical state all the time, and reinforcing bar fixed bolster 28 still has in addition to prevent that reinforcing bar 31 from taking place the displacement effect because of external force exists. Finally, the dowel bar 27 and the force sensor 26 are installed. Note that the dowel 27 is just in contact with the force sensor 26 but does not produce a contact force. In addition, in order to prevent the slurry from seeping out, sealing rings 33 are arranged at the connecting part of the grouting hard tube 21 and the rubber plug 29 and the contact part of the rubber plug 29 and the sample upper cover 34-3.
Iv. preparation of anchor slurry
Preparing grouting proportioning raw materials, pouring weighed sand and cement into a material collecting box 1 in sequence, opening a material conveying valve 1-2, enabling the raw materials to enter a cement mortar stirring box 2 through a material conveying pipe 1-1, closing the material conveying pipe valve 1-2 after all the raw materials fall into the cement mortar stirring box 2, opening an electric stirrer 3, uniformly stirring the cement and the sand, and then closing the electric stirrer 3; and secondly, pouring tap water with corresponding mass into the water collecting tank 6, opening the water delivery valve 6-2, closing the water delivery valve 6-2 after all water in the water collecting tank 6 flows into the cement mortar stirring tank 2, starting the electric stirring machine 3 again, and continuously stirring for 10 minutes. Note that all the valve switches in the apparatus should be closed before the slurry is prepared, and the electric mixer 3 should be turned on in advance, the rotation speed thereof is adjusted to be medium, and the electric mixer is closed after preheating for 3 minutes, and then the slurry preparation is performed.
V. grouting of anchoring body
The slurry outlet valve 8 and the slurry storage chamber vent 14 are opened, the slurry in the stirring tank 2 is pumped into the slurry storage chamber 13 by the pneumatic pump 5, then the slurry storage chamber vent 14 and the slurry outlet valve 8 are closed, the first grouting valve 15 is opened, the grouting pump 17 and the grouting pump 18 are started, and grouting is started. It should be noted that if the slurry in the stirring tank 2 is surplus, in order to prevent the slurry from solidifying, the slurry outlet valve 8 should be closed, and the electric stirrer 3 should be opened to keep the slurry making system in a continuous working state; in addition, the grouting system is also provided with a slurry flow rate regulator 19 and a slurry flow controller 20, so that the flow rate and flow of slurry in the whole grouting process can be conveniently monitored in real time, and the grouting quality of the anchoring body can be ensured. And (3) after grouting, closing the grouting system, pulling out the grouting hard tube 21, inserting the telescopic vibrating rod 50 for vibration, taking out the telescopic vibrating rod 50 after compaction is finished, and sealing the rubber plug.
Vi, pressure application of the slurry
And (3) opening a pressurizing system, setting a pressure condition, automatically pressurizing the system and monitoring static pressure, gradually increasing the pressure applied to the slurry along with the rising of a pressurizing block 39, automatically stopping pressurizing the system after the pressure reaches a target value, starting an automatic compensation mechanism, keeping the pressure applied to the grouting body at a set value, and unloading the pressure after standing for 20min (the pressurizing time can be designed according to test requirements). The process can better simulate the penetration and compaction process of the slurry in the soil body in the grouting process.
Vii drawing test
And carrying out indoor drawing test after the test piece reaches the maintenance age. Firstly, sequentially disassembling a dowel bar 27, a reinforcing steel bar fixing support 28, a rubber plug 29 and a sample upper cover 34-3, and simultaneously replacing the sample upper cover 34-3 with a sample cap 49 with a larger central preformed hole; secondly, connecting the steel bar 31, the anchor rod clamp 48 and the force sensor 26, and adjusting the adjustable bracket 43 to ensure that the steel bar 31 is just contacted with the anchor rod clamp 48; after the installation is finished, the electric lifting cylinders 44 on the two sides of the adjustable support 43 are started, the adjustable support 43 is given a certain speed, the electric lifting cylinders drive the cross beam 42 to ascend at a constant speed, the cross beam 42 drives the steel bars 31 to move upwards through the force sensor 26 and the steel bar clamp 48, and therefore the soil layer anchor rod drawing process is achieved. Meanwhile, the testing machine is connected with the computer 47 through the data line 46, and data in the whole drawing test process are collected through the data collector and finally transmitted to the computer 47 for later data processing and analysis.
Viii disassembling sample and device
After the sample was destroyed, the test was stopped and the data was saved. First, the electric cylinder 44 is started, the adjustable support 43 is lowered, and the electric cylinder 44 is closed after the reinforcing bars 31 and the connector 48-1 are loosened. The force sensor 26, anchor clamps 48 and the broken sample are removed in sequence. The sample can be demoulded by using an electric demould instrument after being taken down, so that later photographing and evidence obtaining are facilitated.
Ix cleaning device
In order to prevent the slurry from solidifying, blocking a test pipeline and causing the waste of a test device, the invention is also provided with a cleaning system. The cleaning system and the cement mortar stirring box 2 share one water collecting tank 6, when the cleaning device works, corresponding valve switches of the pulping system and the grouting system are opened, the air vent 14 is closed, the slurry flow rate regulator 19 and the slurry flow controller 20 are regulated to be maximum, the water suction pump 11, the slurry suction pump 17 and the grouting pump 18 are opened, and cleaning is started.
The main function of the pneumatic pump 5 is to send the cement mortar which is stirred uniformly into the mortar storage chamber 13 through the mortar outlet pipe 9, and also to take the drainage function into consideration. After the cleaning process is completed, a part of water remains in the apparatus, and in order to avoid the influence on the next operation, the water in the slurry making system, the slurry injection system and the slurry flow control system can be discharged to the waste recovery chamber 24 by using the pneumatic pump 5.
The anchor rod sample is prepared by taking care that the ratio of the diameter of the sample to the diameter of the anchoring body used in the test is not less than 5 in order to reduce the influence of the boundary constraint effect.
In order to reduce the influence of the test sample cap 49 on the test result when the anchor rod is pulled, a hole must be reserved in the test sample cap 49, and the diameter of the hole is designed according to the test requirement.
Before grouting, a latex film or filter paper (38) is placed on the pressurizing block 39 and the side wall of the reserved hole to prevent the slurry from being bonded with the pressurizing block 39 in the solidification process; the bottom of the steel bar 31 is flush with the upper part of the sample base 37, and the marking adjustment can be carried out through the steel bar fixing bracket 28; and during grouting, a part of the grouting material is poured to prevent the formed anchoring body from being insufficient in height under the action of static pressure.
The static pressure applying system is attached with an automatic compensation mechanism for ensuring that the pressure borne by the grouting body is always maintained at a set value and ensuring the accuracy and uniqueness of the test variable.
The rebar fixation bracket 28 is rigid, ensuring that the rebar 31 does not rock during the application of static pressure.
In the process of manufacturing the anchor rod sample indoors, the grouting pressure is considered, the penetration of slurry in a soil body in the grouting process can be well simulated, and the compaction process is realized, so that the indoor test is closer to the engineering practice. The grouting quality monitoring method can effectively control and monitor grouting quality, and has the advantages of simple and convenient test operation, small test error and the like. The anchor rod drawing test considering the grouting pressure has wide application range, and is also suitable for the seepage grouting of a sand layer, the compaction grouting of cohesive soil and the like.
Claims (10)
1. The utility model provides a consider soil property stock of slip casting pressure and draw testing arrangement, includes experimental frame (45), its characterized in that: the test machine base (45) is provided with a detachable sample base (37), the sample base (37) is provided with a soil sample container (34) for containing a test soil sample (35), the upper end of the soil sample container (34) is provided with a sample upper cover (34-3) in the grouting process, the upper end of the soil sample container (34) is provided with a sample cap (49) in the drawing test process, the test machine base (45) is further provided with an electric lifting cylinder (44) and an adjustable bracket (43) which are driven to lift, the adjustable bracket (43) is provided with a cross beam (42), the lower end of the cross beam (42) is provided with a force sensor (26), the sensor (26) is connected with a force transmission rod (27) in the grouting process, the sensor (26) is connected with an anchor rod clamp (48) in the drawing test process, the sample upper cover (34-3) is provided with an anchor reserved hole, and a rubber plug (29) for grouting is arranged at the anchoring reserved hole.
2. The soil anchor rod drawing test device and the test method considering grouting pressure according to claim 1, characterized in that: plug (29) link to each other with slip casting hard tube (21), set gradually slurry flow rate regulator (19), slurry flow controller (20) on slip casting hard tube (21), slip casting hard tube (21) tip is inserted into slip casting pump (18) department, slip casting pump (18) are through transporting thick liquid pipe (16) and store up thick liquid room (13) intercommunication.
3. The soil anchor rod drawing test device and the test method considering grouting pressure according to claim 2, characterized in that: store up thick liquid room (13) and communicate through grout outlet pipe (9) and cement mortar agitator tank (2), be provided with on cement mortar agitator tank (2) case (1) and header tank (6) that gather materials, be provided with electric mixer (3), teeter chamber frame (4) in cement mortar agitator tank (2), still be provided with pneumatic pump (5) on cement mortar agitator tank (2).
4. The soil anchor rod drawing test device and the test method considering grouting pressure according to claim 3, characterized in that: cement mortar agitator tank (2) still are provided with the washing subassembly, wash the subassembly and include clean suction pump (11) with play thick liquid pipe (9) intercommunication, clean suction pump (11) play water end is through wasing outlet pipe (10), clean outlet valve (7) and header tank (6) intercommunication.
5. The soil anchor rod drawing test device and the test method considering grouting pressure according to claim 4, characterized in that: the grouting hard pipe (21) is further provided with a waste recovery assembly, the waste recovery assembly comprises a waste recovery pipe (23) communicated with the grouting hard pipe (21), and the other end of the waste recovery pipe (23) is communicated with a waste recovery chamber (24).
6. The soil anchor rod drawing test device and the test method considering grouting pressure according to claim 5, characterized in that: and a grouting body (30) is formed after grouting in the test soil sample (35), and a pressurizing block (39) which is upwards jacked to pressurize the grouting body (30) is arranged in the test machine base (45).
7. The soil anchor rod drawing test device and the test method considering grouting pressure according to claim 1, characterized in that: and a steel bar fixing support (28) for supporting a steel bar (31) inserted into the test soil sample (35) is further arranged at the position of the adjustable support (43).
8. The utility model provides a consider grouting pressure's soil property stock and draw testing arrangement's test method which characterized in that: the method comprises the following steps:
preparation of an indoor soil sample
Assembling a sample bottom cover (34-1) of a soil sample container (34), a soil sample cavity (34-2) and an anchoring body reserved steel pipe (34-4), then preparing a sample by adopting a layered compaction method, finally drawing out the anchoring body reserved steel pipe (34-4) under the condition of ensuring the surface of the soil sample to be flat, and covering a sample upper cover (34-3);
(ii) installing a soil sample
Fixing a soil sample container (34) filled with a test soil sample and a sample base (37) on a test machine base (45) by using a fixing bolt (36), and placing a latex film or filter paper (38) around a central groove of the sample base (37);
(iii) installing the reinforcing bar
Placing a rubber plug (29) with a grouting hard tube (21) at a reserved hole part of an anchoring body of a sample upper cover (34-3); then, fixing the steel bar (31) by using a steel bar fixing support (28), finally, sequentially installing a dowel bar (27) and a force sensor (26) on the upper part of the rubber plug (29), and fixing the sensor (26) on the cross beam (42);
(iv) preparation of Anchor slurry
Opening a material conveying valve (1-2), pouring prepared sand and cement into a material collecting box (1) in sequence, closing the material conveying valve (1-2) after all the sand and cement fall into a cement mortar stirring box (2), starting an electric stirrer (3) to stir the batch in the cement mortar stirring box (2) to be uniform, closing the electric stirrer (3), then pouring tap water with corresponding mass into a water collecting box (6), opening a water conveying valve (6-2), and closing the water conveying valve (6-2) after all the water falls into the cement mortar stirring box (2); the electric stirrer (3) is started again, stirring is continued for 10 minutes, finally, the slurry outlet valve (8) is opened, and cement mortar is pressed into the slurry storage chamber (13) through the pneumatic pump (5);
(v) grouting of the anchors
When grouting, opening a first grouting valve (15), a grouting valve (18-1), a grout outlet valve (18-2) and a second grouting valve (25), starting a grouting pump (17) and a grouting pump (18), adjusting a slurry flow rate regulator (19) and a slurry flow controller (20) for grouting, after grouting, pulling out a grouting hard pipe (21) and inserting the grouting hard pipe into a waste recovery chamber (24), then inserting a telescopic vibrating rod (50) for vibration compaction, and sealing a rubber plug (29) after compaction is completed;
(vi) application of pressure to the slurry
A pressurizing block (39) is started through a device main control dial (40) to perform static pressurization on the grouting body (30), a static pressure value is transmitted to a force sensor (26) through a dowel bar (27), when the static pressure value meets the requirement of a test, the system automatically stops pressurization and starts an automatic compensation mechanism, the system stands for 20min, and the system ensures that the pressure borne by the grouting body (30) always keeps a set value and then is closed;
(vii) drawing test
After the test piece reaches the maintenance age, an indoor drawing test is carried out, firstly, a dowel bar (27), a steel bar fixing support (28), a rubber plug (29) and a sample upper cover (34-3) are sequentially disassembled, meanwhile, the sample upper cover (34-3) is replaced by a sample cap (49) with a large central preformed hole, then, a steel bar (31), an anchor rod clamp (48) and a force sensor (26) are connected, and the steel bar (31) is just contacted with the anchor rod clamp (48) by adjusting an adjustable support (43) to carry out the drawing test;
(viii) dismantle sample and device
Stopping the test after the sample is damaged, storing data, and disassembling the instrument components according to a correct sequence;
(ix) washing apparatus
The device is integrally cleaned, so that the device is convenient to use in next test.
9. The test method of the soil anchor rod drawing test device considering grouting pressure according to claim 8, characterized in that: before grouting, a latex film or filter paper (38) is placed on the pressurizing block (39) and the side wall of the reserved hole to prevent the slurry from being bonded with the pressurizing block (39) in the coagulation process.
10. The test method of the soil anchor rod drawing test device considering grouting pressure according to claim 8, characterized in that: the bottom of the steel bar (31) is flush with the upper part of the sample base (37), and the marking adjustment can be realized through the steel bar fixing bracket (28); and a part of the grouting material is poured during grouting, so that the formed anchoring body is prevented from being insufficient in height under the action of static pressure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911250894.9A CN111198096B (en) | 2019-12-09 | 2019-12-09 | Soil anchor rod drawing test device and test method considering grouting pressure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911250894.9A CN111198096B (en) | 2019-12-09 | 2019-12-09 | Soil anchor rod drawing test device and test method considering grouting pressure |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111198096A true CN111198096A (en) | 2020-05-26 |
| CN111198096B CN111198096B (en) | 2022-01-14 |
Family
ID=70744341
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911250894.9A Active CN111198096B (en) | 2019-12-09 | 2019-12-09 | Soil anchor rod drawing test device and test method considering grouting pressure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111198096B (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111503082A (en) * | 2020-06-10 | 2020-08-07 | 中国十九冶集团有限公司 | Quick disassembling and assembling equipment for pneumatic anchor rod |
| CN111751209A (en) * | 2020-06-10 | 2020-10-09 | 广州建筑产业研究院有限公司 | Testing device and method for simulating internal defects of grouting connecting sleeve |
| CN111794293A (en) * | 2020-06-06 | 2020-10-20 | 同济大学 | Novel compaction grouting soil nail and drawing test device thereof |
| CN112281853A (en) * | 2020-12-11 | 2021-01-29 | 深圳市中景生态环境科技有限公司 | High-efficient slip casting pipe is used to foundation engineering with prevent blockking up function |
| CN112683630A (en) * | 2021-01-25 | 2021-04-20 | 浙江科技学院 | Calcareous sand hollow cylindrical sample in-situ curing sample preparation instrument and sample preparation method |
| CN113029738A (en) * | 2021-03-05 | 2021-06-25 | 中铁四局集团第三建设有限公司 | Anchor rod drawing test sample manufacturing and intelligent maintenance system and use method thereof |
| CN114878337A (en) * | 2022-06-01 | 2022-08-09 | 中国矿业大学 | Method and device for testing fracture anchoring rock anchor rod drawing and interface shear resistance characteristics |
| CN117804891A (en) * | 2024-03-01 | 2024-04-02 | 山西诚达工程质量检测有限公司 | Mechanical property test equipment for steel pipe scaffold fastener |
Citations (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH1048112A (en) * | 1996-08-02 | 1998-02-20 | Fujita Corp | Test of pull-out strength of anchor bolt for machinery |
| EP2192395A1 (en) * | 2008-11-28 | 2010-06-02 | Frank Roch | Method of checking the pulling load of an anchor fixed in a wall or ceiling |
| CN103512805A (en) * | 2013-10-22 | 2014-01-15 | 安徽理工大学 | Pressurizing device for anchor rod pull-out test for simulating surrounding rock stress of anchoring body |
| CN103698215A (en) * | 2013-12-31 | 2014-04-02 | 中国地质大学（北京） | Pull-out test device for anchor cable |
| US20160202232A1 (en) * | 2015-01-12 | 2016-07-14 | University Of Dammam | Pullout apparatus and system for testing of anchor bolts/bars |
| CN206015658U (en) * | 2016-08-25 | 2017-03-15 | 中铁十一局集团第二工程有限公司 | It is applied to the grouting device of sand soil foundation ditch |
| CN106969979A (en) * | 2017-03-27 | 2017-07-21 | 长安大学 | A kind of rockbolt stress characteristic research pull-out test device |
| CN206656920U (en) * | 2017-03-27 | 2017-11-21 | 长安大学 | A kind of rockbolt stress characteristic research pull-out test device |
| CN206876498U (en) * | 2017-06-20 | 2018-01-12 | 中国矿业大学(北京) | The indoor test device of anchor stress loss |
| CN108169005A (en) * | 2018-01-05 | 2018-06-15 | 河北建筑工程学院 | A kind of anchor pole dynamic pull-out test device for the soil body |
| CN108252341A (en) * | 2018-04-03 | 2018-07-06 | 广州市建筑科学研究院有限公司 | A kind of bag pressure formula enlarging anchor rod model test apparatus and method |
| CN109056848A (en) * | 2018-06-27 | 2018-12-21 | 安徽理工大学 | A kind of Full-size Grouted Bolt Pullout Test device and test method |
| CN109269743A (en) * | 2018-08-21 | 2019-01-25 | 河北建筑工程学院 | A kind of ground seismic wave function lower bolt dynamic pull-out test device and test method |
| CN109297810A (en) * | 2018-07-17 | 2019-02-01 | 安徽理工大学 | A kind of simulation deep formation anchor rod drawing experimental rig and test method |
| CN109540788A (en) * | 2018-12-03 | 2019-03-29 | 湖南大学 | Simulation ground pressure acts on the test method and system of lower ground and anchoring body adhesive property |
| CN110186760A (en) * | 2019-06-13 | 2019-08-30 | 河北建筑工程学院 | A kind of soil property anchor rod drawing test method for considering to change confining pressure condition |
| CN110186770A (en) * | 2019-06-20 | 2019-08-30 | 宁夏王洼煤业有限公司 | It is a kind of for restoring the mechanical property experiment device of grouting cable anchor practical application scene |
| CN110261202A (en) * | 2019-07-25 | 2019-09-20 | 泉州装备制造研究所 | A kind of grouting sample preparation device |
-
2019
- 2019-12-09 CN CN201911250894.9A patent/CN111198096B/en active Active
Patent Citations (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH1048112A (en) * | 1996-08-02 | 1998-02-20 | Fujita Corp | Test of pull-out strength of anchor bolt for machinery |
| EP2192395A1 (en) * | 2008-11-28 | 2010-06-02 | Frank Roch | Method of checking the pulling load of an anchor fixed in a wall or ceiling |
| CN103512805A (en) * | 2013-10-22 | 2014-01-15 | 安徽理工大学 | Pressurizing device for anchor rod pull-out test for simulating surrounding rock stress of anchoring body |
| CN103698215A (en) * | 2013-12-31 | 2014-04-02 | 中国地质大学（北京） | Pull-out test device for anchor cable |
| US20160202232A1 (en) * | 2015-01-12 | 2016-07-14 | University Of Dammam | Pullout apparatus and system for testing of anchor bolts/bars |
| CN206015658U (en) * | 2016-08-25 | 2017-03-15 | 中铁十一局集团第二工程有限公司 | It is applied to the grouting device of sand soil foundation ditch |
| CN106969979A (en) * | 2017-03-27 | 2017-07-21 | 长安大学 | A kind of rockbolt stress characteristic research pull-out test device |
| CN206656920U (en) * | 2017-03-27 | 2017-11-21 | 长安大学 | A kind of rockbolt stress characteristic research pull-out test device |
| CN206876498U (en) * | 2017-06-20 | 2018-01-12 | 中国矿业大学(北京) | The indoor test device of anchor stress loss |
| CN108169005A (en) * | 2018-01-05 | 2018-06-15 | 河北建筑工程学院 | A kind of anchor pole dynamic pull-out test device for the soil body |
| CN108252341A (en) * | 2018-04-03 | 2018-07-06 | 广州市建筑科学研究院有限公司 | A kind of bag pressure formula enlarging anchor rod model test apparatus and method |
| CN109056848A (en) * | 2018-06-27 | 2018-12-21 | 安徽理工大学 | A kind of Full-size Grouted Bolt Pullout Test device and test method |
| CN109297810A (en) * | 2018-07-17 | 2019-02-01 | 安徽理工大学 | A kind of simulation deep formation anchor rod drawing experimental rig and test method |
| CN109269743A (en) * | 2018-08-21 | 2019-01-25 | 河北建筑工程学院 | A kind of ground seismic wave function lower bolt dynamic pull-out test device and test method |
| CN109540788A (en) * | 2018-12-03 | 2019-03-29 | 湖南大学 | Simulation ground pressure acts on the test method and system of lower ground and anchoring body adhesive property |
| CN110186760A (en) * | 2019-06-13 | 2019-08-30 | 河北建筑工程学院 | A kind of soil property anchor rod drawing test method for considering to change confining pressure condition |
| CN110186770A (en) * | 2019-06-20 | 2019-08-30 | 宁夏王洼煤业有限公司 | It is a kind of for restoring the mechanical property experiment device of grouting cable anchor practical application scene |
| CN110261202A (en) * | 2019-07-25 | 2019-09-20 | 泉州装备制造研究所 | A kind of grouting sample preparation device |
Non-Patent Citations (4)
| Title |
|---|
| ZHENG, XG 等: "Relation of Bolt"s Pre-tightening Force and Anchoring Force in Deep Mines", 《DISASTER ADVANCES》 * |
| 唐延贵 等: "软岩地层多段扩体锚杆施工工艺及拉拔试验", 《岩土工程技术》 * |
| 李宝平 等: "深基坑土钉墙和预应力锚杆支护分析对比", 《四川建材》 * |
| 毕全超 等: "围压对锚杆砂浆锚固力影响的试验研究", 《河北建筑工程学院学报》 * |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111794293A (en) * | 2020-06-06 | 2020-10-20 | 同济大学 | Novel compaction grouting soil nail and drawing test device thereof |
| CN111503082A (en) * | 2020-06-10 | 2020-08-07 | 中国十九冶集团有限公司 | Quick disassembling and assembling equipment for pneumatic anchor rod |
| CN111751209A (en) * | 2020-06-10 | 2020-10-09 | 广州建筑产业研究院有限公司 | Testing device and method for simulating internal defects of grouting connecting sleeve |
| CN112281853A (en) * | 2020-12-11 | 2021-01-29 | 深圳市中景生态环境科技有限公司 | High-efficient slip casting pipe is used to foundation engineering with prevent blockking up function |
| CN112683630A (en) * | 2021-01-25 | 2021-04-20 | 浙江科技学院 | Calcareous sand hollow cylindrical sample in-situ curing sample preparation instrument and sample preparation method |
| CN112683630B (en) * | 2021-01-25 | 2024-05-24 | 浙江科技学院 | In-situ solidification sample preparation instrument and sample preparation method for calcareous sand hollow cylindrical sample |
| CN113029738A (en) * | 2021-03-05 | 2021-06-25 | 中铁四局集团第三建设有限公司 | Anchor rod drawing test sample manufacturing and intelligent maintenance system and use method thereof |
| CN114878337A (en) * | 2022-06-01 | 2022-08-09 | 中国矿业大学 | Method and device for testing fracture anchoring rock anchor rod drawing and interface shear resistance characteristics |
| CN114878337B (en) * | 2022-06-01 | 2023-02-28 | 中国矿业大学 | Method and device for testing fracture anchoring rock anchor rod drawing and interface shear resistance characteristics |
| CN117804891A (en) * | 2024-03-01 | 2024-04-02 | 山西诚达工程质量检测有限公司 | Mechanical property test equipment for steel pipe scaffold fastener |
| CN117804891B (en) * | 2024-03-01 | 2024-05-10 | 山西诚达工程质量检测有限公司 | Mechanical property test equipment for steel pipe scaffold fastener |
Also Published As
| Publication number | Publication date |
|---|---|
| CN111198096B (en) | 2022-01-14 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN111198096B (en) | Soil anchor rod drawing test device and test method considering grouting pressure | |
| CN201464456U (en) | High-pressure crack grouting simulation test bed | |
| CN210104818U (en) | Intelligent construction model test device for cement mixing pile | |
| CN114718218A (en) | Connecting structure and connecting method of cast-in-place concrete wall and PC member wall | |
| CN111006951A (en) | Indoor grouting test device and simulated grouting test method | |
| CN114150873B (en) | Grouting method for sleeve grouting | |
| CN111678754A (en) | Static pressure and hammering combined sample preparation method and triaxial test device | |
| CN211221340U (en) | Concrete mixing, molding and cleaning integrated device | |
| CN209794174U (en) | Caching type injection equipment for grouting material | |
| CN107102106A (en) | Flow pressure two controls formula laboratory test grouting device | |
| CN101831910B (en) | Construction method of reinforced concrete flange reaming type filling pile | |
| CN106988703B (en) | A kind of consolidation device and consolidation method of chemical sand control agent | |
| CN212254973U (en) | Polyurethane rheological property testing device | |
| CN212904276U (en) | Concrete strength detection device for building construction safety detection | |
| CN111070403B (en) | Manufacturing method of construction solid waste extrusion pile | |
| CN206930645U (en) | A kind of flow pressure two controls formula laboratory test grouting device | |
| CN2232454Y (en) | Sinking pipe casting pile device | |
| CN111829923A (en) | Device and method for testing rheological property of polyurethane | |
| CN217352482U (en) | Large-crack thick slurry drilling and grouting device | |
| CN217212737U (en) | High strength concrete slump testing arrangement | |
| CN209194537U (en) | The underwater anti-isolation self-compaction equipment of cast-in-place concrete pile | |
| CN207295721U (en) | A kind of back taper basic foundation pours support device | |
| CN219528449U (en) | Concrete vibrating device | |
| CN217461364U (en) | Building construction cement terrace is pour and is leveled device | |
| CN221095132U (en) | Grouting device for water conservancy construction |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |