CN111042222B - Test device for simulating influence of shield secondary grouting process on horizontal loaded pile - Google Patents

Test device for simulating influence of shield secondary grouting process on horizontal loaded pile Download PDF

Info

Publication number
CN111042222B
CN111042222B CN201911310171.3A CN201911310171A CN111042222B CN 111042222 B CN111042222 B CN 111042222B CN 201911310171 A CN201911310171 A CN 201911310171A CN 111042222 B CN111042222 B CN 111042222B
Authority
CN
China
Prior art keywords
sleeve
horizontal
pile
shield
box body
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.)
Active
Application number
CN201911310171.3A
Other languages
Chinese (zh)
Other versions
CN111042222A (en
Inventor
袁炳祥
李子豪
陈鹏辉
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Guangdong University of Technology
Original Assignee
Guangdong University of Technology
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Guangdong University of Technology filed Critical Guangdong University of Technology
Priority to CN201911310171.3A priority Critical patent/CN111042222B/en
Publication of CN111042222A publication Critical patent/CN111042222A/en
Application granted granted Critical
Publication of CN111042222B publication Critical patent/CN111042222B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • EFIXED CONSTRUCTIONS
    • E02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02DFOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D33/00Testing foundations or foundation structures

Abstract

The invention discloses a test device for simulating the influence of a shield secondary grouting process on a horizontal loaded pile, which comprises a transparent box body, a sleeve, a model pile and a horizontal tension adjusting device, wherein transparent soil is filled in the transparent box body; a plurality of water outlets are uniformly formed in the outer wall of the sleeve along the axis and the diameter direction, the water outlets are externally connected with a grouting machine, and a sleeve is slidably mounted on the sleeve; the driving device drives the sleeve to slide to open or close the water outlets so as to control the number and the positions of the water outlets for grouting into the transparent soil; the upper part and the side surface of the transparent box body are provided with cameras. The method can be used for researching the mechanical property change of the horizontal loaded pile and the displacement of the soil body around the pile in the secondary grouting process of the shield, so that the result of the model test can provide reference for the influence of the grouting process in real construction on the adjacent pile foundation and the adjacent soil body, and is particularly beneficial to researching the deformation and the displacement of the horizontal loaded pile and the displacement of the adjacent soil body, and the safety accident in the construction process of the urban shield penetrating through the high-rise building is avoided.

Description

Test device for simulating influence of shield secondary grouting process on horizontal loaded pile
Technical Field
The invention relates to a test device, in particular to a test device for simulating the influence of a shield secondary grouting process on a horizontal loaded pile.
Background
With the vigorous development of tunnel engineering construction, the shield method becomes the mainstream tunnel construction method in China, especially in the urban subway construction process. In the shield tunneling process, grouting is carried out between the duct piece and the surrounding soil body so as to fill the gap between the duct piece and the surrounding soil body and prevent the soil body from generating excessive deformation. In the central zone of a city, a high-rise building stands, the pile foundation bears non-negligible horizontal load, and once the soil body around the pile foundation deforms too much, the mechanical property of the horizontal load bearing pile is affected. However, in the process of building urban subways, shield tunnels inevitably pass through the high-rise buildings, and the secondary grouting process of the shield inevitably disturbs soil around the horizontal loaded piles to influence the mechanical properties of the horizontal loaded piles. Therefore, the safety and stability of the shield tunnel when passing through the existing horizontal loaded pile are influenced by the pile-soil interaction in the secondary grouting process of the shield. In the process of soil deformation, due to the opacity of the real soil, observation and quantitative calculation are often difficult in the actual engineering. And the mechanical property of the existing pile foundation is difficult to obtain due to the limitation of field conditions, so that the visual and quantifiable model test has guiding significance for the actual engineering.
Disclosure of Invention
Aiming at the problems, the invention provides a test device which is simple in structure, convenient to operate and flexible in test and can simulate the influence of the secondary grouting process of the shield on a horizontal loaded pile.
The purpose of the invention can be achieved by adopting the following technical scheme:
a test device for simulating the influence of a shield secondary grouting process on a horizontal loaded pile comprises a transparent box body, a sleeve, a model pile and a horizontal tension adjusting device, wherein transparent soil is filled in the transparent box body, the sleeve is arranged in the transparent box body, the model pile is inserted into the transparent soil and is provided with a strain gauge, and the horizontal tension adjusting device is used for applying horizontal tension to the upper end of the model pile; a plurality of water outlets are uniformly formed in the outer wall of the sleeve along the axis and the diameter direction, the water outlets are externally connected with a grouting machine, a sleeve is slidably mounted on the sleeve, and the sleeve is externally connected with a driving device; the driving device drives the sleeve to slide to open or close corresponding water outlets in the axial direction of the sleeve so as to control the number and the positions of the water outlets for grouting into the transparent soil; cameras for acquiring displacement images of the transparent soil in the horizontal and vertical directions are arranged above and on the side surface of the transparent box body
As a preferable scheme, a water delivery port of the grouting machine is communicated with the water outlet through a delivery pipe, a plurality of through holes corresponding to the water outlet are uniformly formed in the outer wall of the delivery pipe along the axial direction and the diameter direction, and the through holes are hermetically connected with the corresponding through holes through connecting pipes.
As a preferable scheme, the driving device is a hydraulic device, one end of the sleeve extends into the transparent box body and is slidably sleeved in the sleeve, and the other end of the sleeve is connected with a piston rod of a hydraulic cylinder of the hydraulic device.
As a preferred scheme, the horizontal tension adjusting device comprises a connecting rope, a pulley and a weight, the pulley is rotatably connected to the transparent box body, one end of the connecting rope is wound on the pulley and is fixedly connected with the upper end of the model pile, and the other end of the connecting rope is connected with the weight.
As a preferable scheme, a ring sleeve is fixedly installed in the transparent box body, and the sleeve is slidably sleeved in the ring sleeve.
As a preferable scheme, five rows of water outlets are arranged along the axial direction, and eight water outlets are uniformly arranged along the radial direction.
Preferably, the two cameras are respectively arranged right above and at the front of the transparent box body.
Preferably, the sleeve, sleeve and collar are circular in cross-section.
Preferably, two of the cameras are in communication with the computer.
The implementation of the invention has the following beneficial effects:
the invention can simulate grouting to the corresponding position in the transparent soil by controlling the sleeve to gradually close or open each row of water outlets in the axial direction of the sleeve, can adjust different grouting pressures by changing the grouting pressure of a grouting machine according to requirements, and can also adjust the horizontal load of the model pile by changing the weight of the weight, thereby establishing a test model which can simulate the influence of the secondary grouting process of the shield on the horizontal loaded pile and the surrounding soil body in the real construction process; the test model can be used for researching the mechanical property change of the horizontal loaded pile and the displacement of soil mass around the pile in the secondary grouting process of the shield, so that the test result of the model can provide reference for the influence of the grouting process in real construction on the adjacent pile foundation and the adjacent soil mass, and is particularly beneficial to researching the deformation and displacement of the horizontal loaded pile and the displacement of the adjacent soil mass, and the safety accident in the construction process of the urban shield penetrating through the high-rise building is avoided.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic structural diagram of a test device for simulating the influence of a shield secondary grouting process on a horizontal loaded pile.
FIG. 2 is a schematic diagram of a connection structure between an internal structure of a transparent box body and a driving device of the test device for simulating the influence of a shield secondary grouting process on a horizontal loaded pile.
FIG. 3 is a schematic structural diagram of a driving device of the test device for simulating the influence of the secondary grouting process of the shield on the horizontal loaded pile.
FIG. 4 is a schematic diagram of a connecting structure of a conveying pipe and a connecting pipe of the test device for simulating the influence of the secondary grouting process of the shield on the horizontal loaded pile and a grouting machine.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Examples
Referring to fig. 1 to 3, the embodiment relates to a test device for simulating the influence of a shield secondary grouting process on a horizontal loaded pile, which comprises a transparent box body 1 filled with transparent soil, a sleeve 2 arranged in the transparent box body 1, a model pile 3 inserted in the transparent soil and provided with a strain gauge, and a horizontal tension adjusting device 4 for applying horizontal tension to the upper end of the model pile 3; a plurality of water outlets 21 are uniformly formed in the outer wall of the sleeve 2 along the axial direction and the diameter direction, the water outlets 21 are externally connected with a grouting machine 5, a sleeve 6 is slidably mounted on the sleeve 2, and the sleeve 6 is externally connected with a driving device 7; the driving device 7 drives the sleeve 6 to slide to open or close the corresponding water outlets 21 in the axial direction of the sleeve 2 so as to control the number and the positions of the water outlets 21 for grouting into the transparent soil; cameras 8 used for acquiring displacement images of the transparent soil in the horizontal and vertical directions are arranged above and on the side surfaces of the transparent box body 1. The two cameras 8 are high-definition cameras.
The test device can simulate grouting to the corresponding position in the transparent soil by gradually closing or opening each row of water outlets 21 in the axial direction of the sleeve 2 through the control sleeve 6, can adjust different grouting pressures by changing the grouting pressure of the grouting machine 5 according to needs, and can also adjust the horizontal load borne by the model pile 3 by changing the weight of the weight, thereby establishing a test model which can simulate the influence of the secondary grouting process of the shield on the horizontal loaded pile and the surrounding soil body in the real construction process; the test model can be used for researching the mechanical property change of the horizontal loaded pile and the displacement of soil mass around the pile in the secondary grouting process of the shield, so that the test result of the model can provide reference for the influence of the grouting process in real construction on the adjacent pile foundation and the adjacent soil mass, and is particularly beneficial to researching the deformation and displacement of the horizontal loaded pile and the displacement of the adjacent soil mass, and the safety accident in the construction process of the urban shield penetrating through the high-rise building is avoided.
As shown in fig. 1 and 4, the grouting machine 5 is communicated with the water outlet 21 through a delivery pipe 51, a plurality of through holes corresponding to the water outlet 21 are uniformly formed in the outer wall of the delivery pipe 51 along the axial direction and the diameter direction, and the through holes are hermetically connected with the corresponding through holes through connecting pipes 52. The delivery tube 51 is inserted into the cannula 2. The grouting machine 5 horizontally transfers grouting liquid into the casing 2 through the transfer pipe 51 and longitudinally transfers grouting liquid into the water outlet 21 through the connection pipe 52, so that the grouting machine 5 can stably grout into the transparent soil through the water outlet 21.
The driving device 7 is a hydraulic device, one end of the sleeve 6 extends into the transparent box body 1 and is sleeved in the sleeve 6 in a sliding manner, and the other end of the sleeve 6 is connected with a piston rod of a hydraulic cylinder of the hydraulic device. The hydraulic device controls the sleeve 6 to gradually close or open each row of water outlets 21 in the axial direction of the casing 2 by controlling the extension or retraction of the piston rod of the hydraulic cylinder, and has simple, flexible and convenient control.
Horizontal tension adjusting device 4 is including connecting rope 41, pulley 42 and weight 43, pulley 42 rotatable coupling is on transparent box 1, connects the one end of rope 41 around connect on pulley 42 and with the upper end fixed connection of model pile 3, connect the other end of rope 41 and be connected with weight 43. The structure can adjust the horizontal load of the model pile 3 by changing the weight of the weight 43 according to the requirement.
The transparent box body 1 is internally and fixedly provided with a ring sleeve 9, and the sleeve 6 is sleeved in the ring sleeve 9 in a sliding way. The ring sleeve 9 plays a limiting role, so that the sleeve 6 can slide conveniently and smoothly along the axis of the ring sleeve 9.
Five rows of water outlets 21 are arranged along the axis direction, and eight water outlets 21 are uniformly arranged along the radial direction. Of course, the number of the water outlets 21 in the axial direction may be more or less than five, and similarly, the number of the water outlets 21 in the radial direction may be more or less than eight.
The two cameras 8 are respectively right above and at the front of the transparent box body 1, so that the two cameras 8 can acquire displacement images of the transparent soil in the horizontal and vertical directions.
The cross-section of the sleeve 6, the sleeve 2 and the collar is circular in shape. Of course, other shapes are possible, such as square.
Two of the cameras 8 are communicatively connected to a computer 10. The computer 10 collects and stores the displacement images of the transparent soil in the horizontal and vertical directions through the camera 8.
The working principle of the invention is as follows:
as shown in fig. 1 and 2, before the test is started, transparent soil is filled into the transparent box body 1, and then the model pile 3 is inserted into the transparent soil; one end of the connecting rope is connected through a fixed pulley model pile 3, and the other end of the connecting rope is connected with a weight, so that the model pile 3 bears horizontal load; the size of the horizontal tension force applied to the model pile 3 can be adjusted by changing the weight of the weight, so that the overall mechanical performance of the model pile 3 is tested when the model pile is subjected to different horizontal loads; in addition, the strain gauge on the model pile 3 can be used for acquiring the strain information of the model pile 3 in real time. The high-definition camera 8 collects displacement images of the transparent soil in the horizontal and vertical directions. When the test is started, the hydraulic device drives the sleeve 6 to move forward towards the interior of the transparent box body 1, so that the sleeve 6 gradually closes each row of water outlets 21 in the axial direction of the sleeve 2; when each row of water outlets 21 is closed, the grouting machine 5 pours the slurry into the transparent soil once through the rest water outlets 21, collects strain information of the strain gauge on the primary model pile 3 and shoots and records displacement images of the transparent soil in the horizontal and vertical directions.
While the invention has been described in connection with what is presently considered to be the most practical and preferred embodiment, it is to be understood that the invention is not to be limited to the disclosed embodiment, but on the contrary, is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims.

Claims (8)

1. A test device for simulating the influence of a shield secondary grouting process on a horizontal loaded pile is characterized by comprising a transparent box body, a sleeve, a model pile and a horizontal tension adjusting device, wherein transparent soil is filled in the transparent box body, the sleeve is arranged in the transparent box body, the model pile is inserted into the transparent soil and is provided with a strain gauge, and the horizontal tension adjusting device is used for applying horizontal tension to the upper end of the model pile; a plurality of water outlets are uniformly formed in the outer wall of the sleeve along the axis and the diameter direction, the water outlets are externally connected with a grouting machine, a sleeve is slidably mounted on the sleeve, and the sleeve is externally connected with a driving device; the driving device drives the sleeve to slide to open or close corresponding water outlets in the axial direction of the sleeve so as to control the number and the positions of the water outlets for grouting into the transparent soil; cameras for acquiring displacement images of the transparent soil in the horizontal direction and the vertical direction are arranged above and on the side face of the transparent box body.
2. The test device for simulating the influence of the secondary grouting process of the shield on the horizontal loaded pile according to claim 1, wherein the driving device is a hydraulic device, one end of the sleeve extends into the transparent box body and is slidably sleeved in the sleeve, and the other end of the sleeve is connected with a piston rod of a hydraulic cylinder of the hydraulic device.
3. The test device for simulating the influence of the secondary grouting process of the shield on the horizontal loaded pile according to claim 1, wherein the horizontal tension adjusting device comprises a connecting rope, a pulley and a weight, the pulley is rotatably connected to the transparent box body, one end of the connecting rope is wound on the pulley and is fixedly connected with the upper end of the model pile, and the other end of the connecting rope is connected with the weight.
4. The test device for simulating the influence of the secondary grouting process of the shield on the horizontally loaded pile according to any one of claims 1 to 3, wherein a ring sleeve is fixedly arranged in the transparent box, and the sleeve is slidably sleeved in the ring sleeve.
5. The test device for simulating the influence of the secondary grouting process of the shield on the horizontal loaded piles according to claim 1, wherein five rows of water outlets are arranged along the axial direction, and eight water outlets are uniformly arranged along the radial direction.
6. The test device for simulating the influence of the secondary grouting process of the shield on the horizontal loaded pile according to claim 1, wherein the two cameras are respectively arranged over and on the front surface of the transparent box body.
7. The apparatus of claim 4, wherein the cross-section of the sleeve, sleeve and collar is circular.
8. The test device for simulating the influence of the secondary grouting process of the shield on the horizontally loaded pile according to claim 1, wherein the two cameras are in communication connection with a computer.
CN201911310171.3A 2019-12-18 2019-12-18 Test device for simulating influence of shield secondary grouting process on horizontal loaded pile Active CN111042222B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201911310171.3A CN111042222B (en) 2019-12-18 2019-12-18 Test device for simulating influence of shield secondary grouting process on horizontal loaded pile

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201911310171.3A CN111042222B (en) 2019-12-18 2019-12-18 Test device for simulating influence of shield secondary grouting process on horizontal loaded pile

Publications (2)

Publication Number Publication Date
CN111042222A CN111042222A (en) 2020-04-21
CN111042222B true CN111042222B (en) 2022-01-28

Family

ID=70237586

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201911310171.3A Active CN111042222B (en) 2019-12-18 2019-12-18 Test device for simulating influence of shield secondary grouting process on horizontal loaded pile

Country Status (1)

Country Link
CN (1) CN111042222B (en)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2851520B2 (en) * 1993-12-22 1999-01-27 三菱重工業株式会社 Shaft
CN202578708U (en) * 2012-03-13 2012-12-05 湖北省产品质量监督检验研究院 Effectiveness evaluation simulation device for shield tunnel synchronous grouting in soft foundation dynamic water stratum
CN103558044A (en) * 2013-11-05 2014-02-05 上海理工大学 Indoor model testing apparatus for analyzing influences of shield tunnel grouting construction on adjacent pile foundations
CN108868801A (en) * 2018-08-27 2018-11-23 郑州大学 A kind of model shielding machine that can simulate slip casting
CN109440843A (en) * 2018-12-24 2019-03-08 西安建筑科技大学 A kind of Model Pile laboratory test combined load bringing device and method
CN109799327A (en) * 2019-03-08 2019-05-24 西南交通大学 A kind of visual shield tunnel construction detection of grouting effects experimental rig and method

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2851520B2 (en) * 1993-12-22 1999-01-27 三菱重工業株式会社 Shaft
CN202578708U (en) * 2012-03-13 2012-12-05 湖北省产品质量监督检验研究院 Effectiveness evaluation simulation device for shield tunnel synchronous grouting in soft foundation dynamic water stratum
CN103558044A (en) * 2013-11-05 2014-02-05 上海理工大学 Indoor model testing apparatus for analyzing influences of shield tunnel grouting construction on adjacent pile foundations
CN108868801A (en) * 2018-08-27 2018-11-23 郑州大学 A kind of model shielding machine that can simulate slip casting
CN109440843A (en) * 2018-12-24 2019-03-08 西安建筑科技大学 A kind of Model Pile laboratory test combined load bringing device and method
CN109799327A (en) * 2019-03-08 2019-05-24 西南交通大学 A kind of visual shield tunnel construction detection of grouting effects experimental rig and method

Also Published As

Publication number Publication date
CN111042222A (en) 2020-04-21

Similar Documents

Publication Publication Date Title
CN108124460B (en) Intelligent numerical control super-pressure is very three-dimensional non-homogeneous plus unloads and pressure stabilizing model assay systems
CN105547721B (en) Double-end sealing leak detection integration observation procedure
CN105372410B (en) Double-end sealing leak detection combined geometry
CN107478512B (en) A kind of detection device and detection method of sleeve grouting quality
CN106226497B (en) Test device and method for simulating influence of shield tunnel synchronous grouting on stratum settlement
CN106644306A (en) Segmented observation system for floor mining destruction zone
CN105386752B (en) Multistage blocks both-end observation system
CN107045044A (en) A kind of pullout type model test apparatus and method for simulating Shield Tunneling mortar depositing construction
CN106546484B (en) Deep tunnel Dynamic Excavation Load Relief System and experimental method
CN108489892A (en) Seabed Shield Tunneling experimental rig and method under the conditions of a kind of seepage flow
CN111042222B (en) Test device for simulating influence of shield secondary grouting process on horizontal loaded pile
CN110441159A (en) The simulation test device and method of borehole wall bearer properties under hydraulic coupling action
CN105628335A (en) Quasi-rectangular shield synchronous grouting test equipment
CN109681229B (en) Tunnel water stop assembly
CN108896736A (en) A kind of vertical physical model and test method for wearing Landslide Hazards of oil-gas pipeline
CN207439823U (en) A kind of soil body test for tensile strength device
CN104278677B (en) A kind of device and method for A/C in antiseepage wall chase section casting process
CN110118084A (en) A kind of ultra-deep shaft shaft construction method
CN102926414B (en) Bedrock extensometer suitable for being installed in hole and installing and embedding method of bedrock extensometer
CN207761693U (en) One kind being used for coal mine excavation operation face suspension device
CN110763183A (en) Model test device and test method for simulating concentrated stacking load in existing tunnel
CN206905955U (en) Dry hole relief valve and hydrofracturing detecting earth stress device
CN109668747A (en) Mechanical Method service channel development machine receives model test platform and its test method
CN212272203U (en) Shield constructs and wears existing subway tunnel simulation settlement control device down
CN214426961U (en) Centrifugal simulation device for pipe jacking construction of assembled pipeline structure

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