CN112144586B - Elevation detection device and cast-in-place pile concrete elevation detection equipment - Google Patents

Elevation detection device and cast-in-place pile concrete elevation detection equipment Download PDF

Info

Publication number
CN112144586B
CN112144586B CN202011001287.1A CN202011001287A CN112144586B CN 112144586 B CN112144586 B CN 112144586B CN 202011001287 A CN202011001287 A CN 202011001287A CN 112144586 B CN112144586 B CN 112144586B
Authority
CN
China
Prior art keywords
concrete
piece
main body
elevation
leakage preventing
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.)
Expired - Fee Related
Application number
CN202011001287.1A
Other languages
Chinese (zh)
Other versions
CN112144586A (en
Inventor
王子航
赵慧斌
刘硕
黄瑞
卢春华
张涛
王荣璟
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.)
China University of Geosciences
Original Assignee
China University of Geosciences
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 China University of Geosciences filed Critical China University of Geosciences
Priority to CN202011001287.1A priority Critical patent/CN112144586B/en
Publication of CN112144586A publication Critical patent/CN112144586A/en
Application granted granted Critical
Publication of CN112144586B publication Critical patent/CN112144586B/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • EFIXED CONSTRUCTIONS
    • E02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02DFOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D33/00Testing foundations or foundation structures
    • EFIXED CONSTRUCTIONS
    • E02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02DFOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D5/00Bulkheads, piles, or other structural elements specially adapted to foundation engineering
    • E02D5/22Piles
    • E02D5/34Concrete or concrete-like piles cast in position ; Apparatus for making same

Landscapes

  • Engineering & Computer Science (AREA)
  • Structural Engineering (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)
  • On-Site Construction Work That Accompanies The Preparation And Application Of Concrete (AREA)
  • Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)

Abstract

The invention is suitable for the technical field of building pile foundations, and provides an elevation detection device, which comprises: the main body plays a role in supporting and mounting; the concrete leakage preventing piece is arranged at the end part of the main body and is provided with a leakage hole; the display piece is connected to the end part of the main body far away from the concrete leakage preventing piece and is used for displaying the height of an interface; wherein, the leak hole on the concrete leakage-proof piece is larger than the upper layer material and smaller than the particle diameter of the lower layer material. When the concrete leakage-proof piece is inserted between an upper layer substance and a lower layer substance, the lower layer substance has a barrier effect on the concrete leakage-proof piece, and the insertion depth of the main body can be checked through the display piece, so that the elevation of the substance to be measured can be measured, and the invention has the advantages that: simple structure, convenient and quick measurement, accurate detection, low production cost and convenient popularization and implementation.

Description

Elevation detection device and cast-in-place pile concrete elevation detection equipment
Technical Field
The invention belongs to the technical field of building pile foundations, and particularly relates to an elevation detection device and cast-in-place pile concrete elevation detection equipment.
Background
Along with the rapid development of economy in China, the foundation construction process is continuously accelerated, and the cast-in-situ bored pile is widely applied to engineering construction of industrial buildings, high-rise buildings, water conservancy and hydropower, bridge wharfs and the like due to the characteristics of wide adaptability, large bearing capacity of a single pile, low engineering cost, good earthquake resistance and the like. The design theory and the construction process of the cast-in-situ bored pile quickly tend to be mature, but the hidden characteristic is strong, and particularly when concrete is poured underwater, the elevation of a concrete interface cannot be measured accurately, so that the over-grouting phenomenon occurs, the construction cost is increased, the pile body quality is directly caused to have potential safety hazards, and the quality of the whole engineering quality problem can be involved in serious situations.
Disclosure of Invention
The embodiment of the invention aims to provide an elevation detection device and aims to solve the problem of poor accuracy.
The embodiment of the present invention is implemented as follows, in which an elevation detection apparatus includes:
the main body plays a role in supporting and mounting;
the concrete leakage preventing piece is arranged at the end part of the main body and is provided with a leakage hole;
the display piece is connected to the end part of the main body far away from the concrete leakage preventing piece and is used for displaying the height of an interface;
wherein, the leak hole on the concrete leakage-proof piece is larger than the upper layer material and smaller than the particle diameter of the lower layer material.
In the embodiment of the invention, the end of the main body with the concrete leakage preventing piece is inserted into the non-solidified object with the elevation to be measured, wherein a density interface is formed in the non-solidified object, the concrete leakage preventing piece is inserted between the density interfaces, the particles of the substance on the upper density interface can pass through the leakage holes on the concrete leakage preventing piece, the particles of the substance on the lower density interface can not pass through and can not move downwards or be inserted into the main body, when the concrete leakage preventing piece is inserted between the substance on the upper layer and the substance on the lower layer, the particles of the substance on the lower layer can not pass through the leakage holes on the concrete leakage preventing piece, the concrete leakage preventing piece can not enter the substance on the lower layer, the substance on the lower layer has the effect of obstructing the concrete leakage preventing piece, the main body is stopped from being inserted downwards by an induction device or artificially inducing and sensing resistance, the insertion depth of the main body can be checked by the display piece, low production cost and convenient popularization and implementation.
Another object of an embodiment of the present invention is to provide a bored concrete pile elevation detection apparatus, including:
the storage battery is used for providing power supply;
the density detection piece is arranged at the end part of the main body close to the concrete leakage blocking piece and is used for measuring the density of a substance in real time; and the number of the first and second groups,
the elevation detection device;
the storage battery is arranged at the end part of the main body far away from the concrete leakage-resisting piece; the density detection piece is electrically connected with a second alarm signal lamp.
In the embodiment of the invention, according to the concrete cast-in-place pile being cast in, the media in the hole from top to bottom are as follows: mud → laitance → concrete interface. The main body is provided with a concrete leakage-resisting piece end and is inserted into a concrete material, wherein slurry, a floating slurry layer and a concrete interface are formed inside the concrete material, particles of the slurry and the floating slurry layer are smaller than the diameter of a leakage hole of the concrete leakage-resisting piece, the slurry and the floating slurry pass through the leakage hole in the concrete leakage-resisting piece, when the concrete interface reaches a designed elevation, the diameter and the density of concrete stones are larger than those of the slurry and the floating slurry layer, the concrete leakage-resisting piece intercepts stone materials at the concrete interface, a density detecting piece continuously measures density changes in the hole, and when the detected density is stable and tends to the concrete density, a second alarm signal lamp is triggered to work. The depth of insertion of main part can be looked over through the demonstration piece to this elevation that can measure concrete bored concrete pile, measure convenient and fast, detect the accuracy, simple structure, low in production cost, the facilitate promotion is implemented. The intelligent degree of equipment is high, simple structure, and easily operation, through two alarm system mechanism, monitoring result reliability is strong, but wide application in engineering construction such as industrial building, high-rise building, water conservancy and hydropower and bridge pier. The invention has the advantages that: simple structure, convenient and quick measurement, accurate detection, low production cost and convenient popularization and implementation.
Drawings
Fig. 1 is a perspective structural view of an elevation detection apparatus according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a cast-in-place pile concrete elevation detection apparatus according to an embodiment of the present invention;
in the drawings: the device comprises a control button 1, a control chip 2, an elevation display 3, a circuit control loop 4, a telescopic probe rod 5, a spring shell 6, a pressure spring 7, a spring positioning ring 8, a spring end cover 9, a pressure push rod 10, a first alarm signal lamp 11, a second alarm signal lamp 12, a storage battery 13, an electric motor 14, a displacement sensor 15, a transmission shaft 16, a concrete blocking funnel 17 and a density detection rod 18.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Specific implementations of the present invention are described in detail below with reference to specific embodiments.
As shown in fig. 1, a structure diagram of an elevation detection apparatus according to an embodiment of the present invention includes:
the main body plays a role in supporting and mounting;
the concrete leakage preventing piece is arranged at the end part of the main body and is provided with a leakage hole;
the display piece is connected to the end part of the main body far away from the concrete leakage preventing piece and is used for displaying the height of an interface;
wherein, the leak hole on the concrete leakage-proof piece is larger than the upper layer material and smaller than the particle diameter of the lower layer material.
In the embodiment of the invention, the end of the main body with the concrete leakage preventing piece is inserted into the non-solidified object with the elevation to be measured, wherein a density interface is formed in the non-solidified object, the concrete leakage preventing piece is inserted between the density interfaces, the particles of the substance on the upper density interface can pass through the leakage holes on the concrete leakage preventing piece, the particles of the substance on the lower density interface can not pass through and can not move downwards or be inserted into the main body, when the concrete leakage preventing piece is inserted between the substance on the upper layer and the substance on the lower layer, the particles of the substance on the lower layer can not pass through the leakage holes on the concrete leakage preventing piece, the concrete leakage preventing piece can not enter the substance on the lower layer, the substance on the lower layer has the effect of obstructing the concrete leakage preventing piece, the main body is stopped from being inserted downwards by an induction device or artificially inducing and sensing resistance, the insertion depth of the main body can be checked by the display piece, low production cost and convenient popularization and implementation.
In an example of the invention, the main body can be of a rod-shaped structure or a telescopic structure, the concrete leakage preventing pieces can be detachably fixed at the end parts of the main body, different types of concrete leakage preventing pieces can be replaced according to different detection substances, the different types of concrete leakage preventing pieces are provided with leakage holes with different apertures, so that the detection substances on different interfaces can be limited, the detection of different substances can be carried out, and the concrete leakage preventing pieces can be connected to the main body through threads, so that the connection is convenient and stable. The display member may be a graduation mark, a position display, etc., and will not be described herein. The weep holes are grid holes so as to facilitate the passing of the particulate matter.
As a preferred embodiment of the invention, the main body is of a telescopic structure, so that the occupied space of the main body is reduced, and the main body is convenient to carry and store. The main part includes electric motor 14, transmission shaft 16 and flexible probe 5, and flexible probe 5 is by the nested tubular structure of a plurality of screw threads, and electric motor 14 installs the tip at the main part, and transmission shaft 16 is connected at electric motor 14's output shaft and flexible probe 5, rotates through electric motor 14 drive transmission shaft 16 to this makes flexible probe 5 relative rotation, makes flexible probe 5 flexible, with the flexible of this control main part. The electric motor 14 is used for controlling, so that manual operation is avoided, and the operation is convenient and quick. Inside displacement sensor 15 that is provided with of extending structure to be connected with control chip 2 and elevation display 3, through the flexible length of displacement sensor 15 response main part, and show on elevation display 3, show the main part height with this. The displacement sensor 15 may be provided on the electric motor 14 and the driving shaft 16 to sense the telescopic length by sensing the number of rotations of the driving shaft 16. The control button 1 is connected to the electric motor 14, and the control button 1 controls the on/off and the rotation speed of the electric motor 14.
As a preferred embodiment of the invention, an elastic telescopic structure is arranged between the concrete leakage-resisting piece and the main body, a circuit switch is arranged in the elastic telescopic structure, the circuit switch is connected with a first alarm which can be a first alarm signal lamp 11, when the concrete leakage-resisting piece is inserted into the interior of a detected material, the elastic telescopic structure is compressed and forms displacement when the concrete leakage-resisting piece is subjected to resistance, the circuit switch forms a closed structure, and signals are transmitted to the first alarm through the control chip 2 to alarm, so that the alarm is given out, the operator is warned, the test technical experience dependence is avoided, the operation error is avoided, and the detection accuracy is improved. The electric motor 14, the control chip 2, the elevation display 3, the displacement sensor 15 and the first alarm inside the main body are connected through the circuit control loop 4.
As a preferred embodiment of the invention, the concrete leakage-resisting piece is in a structure of a concrete leakage-resisting funnel 17, when the concrete leakage-resisting piece is subjected to the supporting force, the stressed area of the concrete leakage-resisting piece is increased so as to support, and when the main body is pulled out, the concrete leakage-resisting piece is in a conical structure, so that the pulling-out is convenient, and the pulling-out resistance is reduced.
As a preferred embodiment of the invention, the elastic telescopic structure comprises a spring shell 6, a pressure spring 7 and a pressure push rod 10, wherein the pressure spring 7 is nested in the spring shell 6, the pressure push rod 10 is connected to the pressure spring 7 and is nested in the spring shell 6 in a sliding manner, a concrete leakage preventing piece is connected to the pressure push rod 10 at the moment, the spring shell 6 is connected to the main body through threads, when the concrete leakage preventing piece is subjected to resistance, force is applied to the pressure push rod 10, the pressure push rod 10 pushes the pressure spring 7 to contract, and when the force disappears, the pressure spring 7 returns under the action of the pressure spring, so that the telescopic structure is realized, at the moment, the main body internal control chip 2 and the first alarm are connected in series through the circuit control loop 4, and the circuit control loop 4 is installed on the pressure spring 7 and forms a switch, so that the circuit switch can be. The pressure push rod 10 has a T-shaped structure, thereby facilitating installation. The end part of the pressure push rod 10 is nested between the inside of the spring shell 6 and the pressure spring 7, a spring positioning ring 8 is arranged inside the spring shell 6 in a sliding mode, and the spring positioning ring 8 is matched with the pressure push rod 10 to realize displacement and facilitate sliding of the pressure push rod 10. One end of the spring shell 6 close to the concrete leakage-proof piece is detachably connected with a spring end cover 9, and the spring end cover 9 is connected to the spring shell 6, so that the pressure push rod 10, the pressure spring 7 and the spring positioning ring 8 can be conveniently installed.
As shown in fig. 2, a cast-in-place pile concrete elevation detection apparatus provided in an embodiment of the present invention further includes:
a storage battery 13 for supplying power;
the density detection piece is arranged at the end part of the main body close to the concrete leakage blocking piece and is used for measuring the density of a substance in real time; and the number of the first and second groups,
the elevation detection device;
wherein, the storage battery 13 is arranged at the end part of the main body far away from the concrete leakage-resistant piece; the density detecting element is electrically connected with a second alarm which can be a second alarm signal lamp 12.
In the embodiment of the invention, according to the concrete cast-in-place pile being cast in, the media in the hole from top to bottom are as follows: mud → laitance → concrete interface. The main body is provided with a concrete leakage-resisting piece end and is inserted into a concrete material, wherein slurry, a floating slurry layer and a concrete interface are formed inside the concrete material, particles of the slurry and the floating slurry layer are smaller than the diameter of a leakage hole of the concrete leakage-resisting piece, the slurry and the floating slurry pass through the leakage hole in the concrete leakage-resisting piece, when the concrete interface reaches a designed elevation, the diameter and the density of concrete stones are larger than those of the slurry and the floating slurry layer, the concrete leakage-resisting piece intercepts stone materials at the concrete interface, a density detecting piece continuously measures density changes in the hole, and when the detected density is stable and tends to the concrete density, a second alarm is triggered to work. The depth of insertion of main part can be looked over through the demonstration piece to this elevation that can measure concrete bored concrete pile, measure convenient and fast, detect the accuracy, simple structure, low in production cost, the facilitate promotion is implemented. The density detection piece is a density detection rod 18, and the measurement resistance is reduced.
As a preferred embodiment of the invention, the density detecting piece is installed in the circuit control loop 4 in parallel and connected through the inner hole of the pressure push rod 10, and is used for measuring the density of the concrete in real time and transmitting the density to the control chip 2 through the circuit control loop 4 for processing, and the second alarm works after the density set value of the system is reached.
The elevation detection device is provided in the embodiment of the invention, and the cast-in-place pile concrete elevation detection equipment is provided based on the elevation detection device, when the concrete leakage preventing piece is inserted between the upper-layer substance and the lower-layer substance, particles of the lower-layer substance cannot penetrate through the leakage hole on the concrete leakage preventing piece, the concrete leakage preventing piece can enter the lower-layer substance, the lower-layer substance has a blocking effect on the concrete leakage preventing piece, the downward insertion of the main body is stopped through a sensing device or manual sensing and resistance sensing, the insertion depth of the main body can be checked through the display piece, and therefore, the elevation of the substance to be detected can be measured. Through extending structure, improved measuring capability and reduced occupation space, be convenient for transport and storage. Through elastic telescopic structure and alarm, improved measuring capability, avoided experience to rely on.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.

Claims (9)

1. The elevation detection apparatus, characterized in that, the elevation detection apparatus includes:
a main body;
the concrete leakage preventing piece is arranged at the end part of the main body and is provided with a leakage hole;
the display piece is connected to the end part of the main body far away from the concrete leakage preventing piece and is used for displaying the height of an interface;
the leak hole on the concrete leakage preventing piece is larger than the upper layer substance to be detected and smaller than the particle diameter of the lower layer substance;
an elastic telescopic structure is arranged between the concrete leakage preventing piece and the main body, a circuit switch is arranged in the elastic telescopic structure, and the circuit switch is connected with a first alarm;
the method comprises the following steps that a main body is provided with a concrete leakage preventing piece end, the concrete leakage preventing piece end is inserted into a non-solidified object with an elevation to be measured, the concrete leakage preventing piece is inserted between density interfaces, particles of substances on the upper density interface penetrate through a leakage hole in the concrete leakage preventing piece, particles of substances on the lower density interface cannot penetrate through the leakage hole, and the lower layer substances have a blocking effect on the concrete leakage preventing piece; the elastic telescopic structure is compressed and forms displacement, the circuit switch forms a closed structure, and the first alarm gives an alarm.
2. The elevation sensing apparatus of claim 1, wherein the body is a telescoping structure.
3. The level detecting device of claim 2, wherein the main body comprises an electric motor, a transmission shaft, and a telescopic probe, the telescopic probe is a tubular structure with a plurality of threads nested in each other, the electric motor is mounted at an end of the main body, and the transmission shaft is connected to an output shaft of the electric motor and the telescopic probe.
4. The elevation sensing apparatus of claim 3, wherein a displacement sensor is disposed inside the telescopic structure, and a control chip and an elevation display are connected thereto.
5. The elevation testing device of claim 1, wherein the concrete leakage preventing member is a concrete leakage preventing funnel structure.
6. The level detecting device according to claim 1, wherein the resilient telescoping structure comprises a spring housing, a pressure spring nested inside the spring housing, and a pressure ram connected to the pressure spring and slidably nested inside the spring housing.
7. The elevation testing device of claim 6, wherein a spring retaining ring is disposed at an end of the pressure ram nested between an interior of the spring housing and the pressure spring, the spring retaining ring being slidably disposed within the spring housing.
8. The level sensing device of claim 6, wherein a spring end cap is attached to the spring housing.
9. The utility model provides a bored concrete pile concrete elevation check out test set which characterized in that, bored concrete pile concrete elevation check out test set includes:
the storage battery is used for providing power supply;
the density detection piece is used for measuring the density of the substance in real time; and the number of the first and second groups,
an elevation sensing apparatus according to any one of claims 1 to 8;
the density detection piece is arranged at the end part of the main body close to the concrete leakage prevention piece and is electrically connected with a second alarm.
CN202011001287.1A 2020-09-22 2020-09-22 Elevation detection device and cast-in-place pile concrete elevation detection equipment Expired - Fee Related CN112144586B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202011001287.1A CN112144586B (en) 2020-09-22 2020-09-22 Elevation detection device and cast-in-place pile concrete elevation detection equipment

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202011001287.1A CN112144586B (en) 2020-09-22 2020-09-22 Elevation detection device and cast-in-place pile concrete elevation detection equipment

Publications (2)

Publication Number Publication Date
CN112144586A CN112144586A (en) 2020-12-29
CN112144586B true CN112144586B (en) 2021-05-25

Family

ID=73892645

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202011001287.1A Expired - Fee Related CN112144586B (en) 2020-09-22 2020-09-22 Elevation detection device and cast-in-place pile concrete elevation detection equipment

Country Status (1)

Country Link
CN (1) CN112144586B (en)

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100483081C (en) * 2005-03-10 2009-04-29 上海昌吉地质仪器有限公司 Underwater concrete pouring level position indicator
CN202194122U (en) * 2011-07-31 2012-04-18 杭州宏扬基础工程有限公司 Pile top concrete pouring controlling, sampling and warning device
CN202672149U (en) * 2012-05-30 2013-01-16 甘肃省建设投资(控股)集团总公司 Height controller for underwater concrete grouting pile
CN203256733U (en) * 2013-05-06 2013-10-30 中国建筑第八工程局有限公司 Device for detecting pile top concrete elevation of cast-in-place pile
CN104018507B (en) * 2014-06-25 2015-09-09 中冶集团武汉勘察研究院有限公司 A kind of underwater concrete filling pile elevation control device and using method thereof
CN108824504A (en) * 2018-07-10 2018-11-16 长江岩土工程总公司(武汉) The superfilled height detecting device of drill-pouring pile concrete and method
CN111236238A (en) * 2020-01-19 2020-06-05 中国十七冶集团有限公司 Cast-in-place pile top concrete elevation control device and installation and recovery method thereof
CN111395323A (en) * 2020-04-13 2020-07-10 中北大学 Pressure sensor-based super-irrigation prevention control device and application method thereof

Also Published As

Publication number Publication date
CN112144586A (en) 2020-12-29

Similar Documents

Publication Publication Date Title
CN106638719B (en) Bored pile piling quality automatic monitoring controller and method
CN105676308B (en) A kind of underground water in single well seepage velocity flow directional detection method and measuring instrument
CN111442713A (en) Soil body 3D displacement measuring device
US20200278473A1 (en) Borehole inspecting and testing device and method of using the same
CN102645288B (en) Fast press-in type real-time deep underground water temperature monitoring device
CN110146939B (en) Deep groundwater flow velocity determination method
US20150233230A1 (en) Borehole inspecting and testing device and method of using the same
CN110736422B (en) Prefabricated magnetic field layout system and deformation state response method
CN103643703A (en) Intelligent monitoring device and method for underwater concrete pouring elevation
CN103147432A (en) Spherical hole-pressure static cone penetration probe for detecting sludge
CN208845167U (en) A kind of inclinometer reconnoitred for creep deformation stage sliding surface
CN103046524A (en) Piezocone penetration test probe for probing underground magnetic field intensity
CN210166018U (en) Subway station foundation pit underground water level real-time supervision device
WO2016178684A1 (en) Borehole inspecting and testing device and method of using the same
CN115573397B (en) Evaluation model design and evaluation method for soil plug compaction effect of offshore wind power pile foundation
KR20180007596A (en) Device for measuring suspension in borehole stability fluids and a slime thickness at the bottom of a pile borehole
CN114136824B (en) Soil erosion test device and method
CN112144586B (en) Elevation detection device and cast-in-place pile concrete elevation detection equipment
CN111042223B (en) Super-irrigation detection device
CN108469236A (en) A kind of intelligent column buried depth probe suitable for guardrail movement inspection platform
CN102520134A (en) Environmental probe capable of in-situ testing pH value of soil body
CN108254293B (en) Offshore anti-liquefying ability in-situ measurement device
CN111562289B (en) In-situ testing method for sludge solidification
CN115015041A (en) Test device for density test of cement concrete core sample and use method thereof
CN209243791U (en) A kind of foundation pit construction parameter detection device

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
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20210525

CF01 Termination of patent right due to non-payment of annual fee