CN116927164A - Protective tube probe linkage penetration static cone penetration test device and method - Google Patents

Protective tube probe linkage penetration static cone penetration test device and method Download PDF

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Publication number
CN116927164A
CN116927164A CN202210345110.6A CN202210345110A CN116927164A CN 116927164 A CN116927164 A CN 116927164A CN 202210345110 A CN202210345110 A CN 202210345110A CN 116927164 A CN116927164 A CN 116927164A
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CN
China
Prior art keywords
probe
probe rod
penetration
rod
protective tube
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.)
Pending
Application number
CN202210345110.6A
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Chinese (zh)
Inventor
王鹏
范红申
饶猛
张祖国
金忠良
梁正峰
郭增卿
徐高峰
张昆
王振红
胡治高
霍禹光
徐佳斌
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Zhejiang Huadong Construction Engineering Co Ltd
Original Assignee
Zhejiang Huadong Construction Engineering Co Ltd
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Filing date
Publication date
Application filed by Zhejiang Huadong Construction Engineering Co Ltd filed Critical Zhejiang Huadong Construction Engineering Co Ltd
Priority to CN202210345110.6A priority Critical patent/CN116927164A/en
Publication of CN116927164A publication Critical patent/CN116927164A/en
Pending legal-status Critical Current

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    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D1/00—Investigation of foundation soil in situ
    • E02D1/02—Investigation of foundation soil in situ before construction work
    • E02D1/022—Investigation of foundation soil in situ before construction work by investigating mechanical properties of the soil
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E30/00—Energy generation of nuclear origin
    • Y02E30/30—Nuclear fission reactors

Abstract

The invention relates to a protective tube probe linkage penetration static cone penetration test device and a method, which are mainly applied to offshore platform type static cone penetration test and are applicable to the field of offshore in-situ test. The invention mainly aims at special stratum of Zhejiang sea area in China, reduces complicated procedures of lifting and lowering probe rod, protective pipe, drill rod and the like in the traditional operation method, can improve the penetration depth of the CPT first section of the platform, shortens single-hole operation time and improves the platform operation efficiency; on the other hand, as the hole is not swept by a drilling machine, a methane leakage channel is not formed before static detection penetration, the problem that methane blowout affects operation in the operation process can be solved, and the method is safe and reliable and convenient to use.

Description

Protective tube probe linkage penetration static cone penetration test device and method
Technical Field
The invention relates to a protective tube probe linkage penetration static cone penetration test device and a method, which are mainly applied to offshore platform type static cone penetration test and are applicable to the field of offshore in-situ test.
Background
The platform type static sounding is characterized in that a static sounding penetration meter is fixed on an offshore platform, and the platform is used for providing counter force for static sounding, namely a platform CPT. The method is widely applied to the field of in-situ testing of ocean engineering.
When the platform type static cone penetration test is carried out, a set of large sleeve is firstly required to be installed, the bottom of the sleeve is inserted into the seabed surface, and the top of the sleeve is fixed in the platform moon pool and used for isolating seawater so as to avoid the influence of water flow impact; and then a set of small protective pipes are arranged, the lower part of each small protective pipe is inserted into a relatively hard soil layer, the upper part of each small protective pipe is fixed on the platform, lateral support is provided for the probe rod, and the probe rod is prevented from being bent too much when being pressed in water or soft soil layers such as silt, mucky soil and the like, so that the accident of breaking the probe rod is caused.
According to the water depth and stratum condition of each sea area, the penetration depth of a static probe single section is generally 30-45 m, when deep hole static probe is carried out (more than 70-80 m), the static probe single section can be completed by dividing into 2-3 sections, after the single section penetration is finished, the probe rod is firstly required to be pulled out completely, then the protection pipe is pulled out completely, the drill rod and the drilling tool are lowered to clear holes until the penetration depth of the upper section is finished, the protection pipe and the probe rod are lowered to the bottom of the holes again, the lower section test can be carried out, a large amount of operation time is wasted for lifting and lowering the probe rod, the protection pipe and the drill rod each time, and the probe can be used for a second time after being taken out along with the probe rod and being required to be saturated again in vacuum, so that the whole hole operation time is longer.
The stratum is special in the Zhejiang sea area of China due to geographic reasons, the upper part is soft and hard, the upper part is a soft soil layer such as 30-50 m sludge, mucky soil and the like, the lower part is a relatively hard clay and sandy soil layer, the upper part has small penetrating friction, and the possibility of using a thicker protective tube (the surface area is 2.5 times of that of a probe rod) for penetrating is provided; and the sand soil in the local sea area contains methane, when a drilling machine sweeps holes to expose a methane layer, an overflow channel is formed, and the methane drives sediment and slurry layer to blow out along drilling holes for 1-2 days in short time and longer time for more than a month, so that the operation progress and safety are affected.
Disclosure of Invention
The first aim of the invention is to research a static cone penetration test device for the linkage penetration of a protective pipe probe aiming at the special stratum of the Zhejiang sea area in China, improve the traditional operation procedure, further improve the operation efficiency and solve the problem that the operation is influenced by methane blowout.
For this purpose, the above object of the present invention is achieved by the following technical solutions:
a protective tube probe linkage penetration static cone penetration test device is characterized in that: the static penetration test device comprises an offshore platform, wherein a static penetration instrument is arranged on the offshore platform, an automatic rod clamping device and a slip arranged in the automatic rod clamping device are arranged above the static penetration instrument, the slip comprises a protection pipe slip and a probe rod slip so as to be replaced when the protection pipe and the probe rod penetrate downwards, a large sleeve is erected on the offshore platform, a probe rod with protection pipe is sleeved in the large sleeve, the upper end of the protection pipe is erected on the large sleeve, a probe rod clamp is arranged at the lower end of the protection pipe and used for clamping a first-joint expanding probe rod in the lower end of the protection pipe, a probe is arranged at the bottom of the probe rod and is positioned below the probe rod clamp, a cable is arranged in the probe rod in a penetrating mode, the lower end of the cable is connected with the probe, and the upper end of the cable is connected with static penetration test equipment;
the probe rod hug device has a pressure limit value: when the downward pressure of the probe rod is larger than the pressure limit value of the probe rod enclasping device, the first-section expanding probe rod is separated from the enclasping device, and the probe rod is in a downward free movement state; when the upper pulling force of the probe rod is larger than the pressure limit value of the probe rod clasper, the first-section expanding probe rod returns to the original position, and the probe rod is clamped again.
The invention can also adopt or combine the following technical proposal when adopting the technical proposal:
as a preferable technical scheme of the invention: and a sleeve gasket is inserted between the large sleeve and the offshore platform and is used for clamping the top of the large sleeve and fixing the large sleeve to the offshore platform.
As a preferable technical scheme of the invention: the automatic rod clamping device is characterized in that a quick clamp is arranged above the automatic rod clamping device and used for clamping the upper part of the probe rod so as to prevent the probe rod and the probe from falling into sea water when the probe rod clamping device suddenly fails.
As a preferable technical scheme of the invention: a protective tube pad is inserted between the upper end of the protective tube and the large sleeve, and the protective tube pad is used for preventing the protective tube and the probe rod from falling into seawater together.
As a preferable technical scheme of the invention: and pile legs are arranged below the offshore platform.
As a preferable technical scheme of the invention: and pile shoes are arranged at the bottoms of the pile legs.
As a preferable technical scheme of the invention: the protective tube is formed by splicing multiple sections.
As a preferable technical scheme of the invention: the probe rod is formed by splicing multiple sections.
As a preferable technical scheme of the invention: the pressure limit value of the probe rod enclasping device is larger than twice of the self weight of the probe rod.
The invention also aims to provide a linkage penetration method of the protective tube probe rod of the static cone penetration test device, aiming at the defects in the prior art.
For this purpose, the above object of the present invention is achieved by the following technical solutions:
a linkage penetration method of a protective tube probe rod of a static cone penetration test device is characterized by comprising the following steps of: the protective tube probe linkage penetration method of the static cone penetration test device is based on the protective tube probe linkage penetration static cone penetration test device and comprises the following steps:
s1, calculating the service length of a protective tube according to the sea water depth, arranging a section of protective tube according to the sequence of sleeving a section of the probe rod, and after the length of the protective tube is enough, independently arranging the probe rods which independently penetrate into the section, and sequentially penetrating cables through all the probe rods and the protective tube;
s2, positioning an offshore platform, installing a large sleeve on the offshore platform, and inserting a sleeve gasket between the large sleeve and the offshore platform;
s3, hoisting a static penetration tester on the offshore platform, and leveling;
s4, installing a probe and a probe rod hugger, alternately installing a probe rod and a protective tube, and slowly lowering the probe rod by a probe rod lifting hook and a protective tube lifting hook until the probe enters an upper soft soil layer; before each time the protective tube hanging hook is released, a protective tube pad is inserted between the upper end of the protective tube and the large sleeve, so that the protective tube and the probe rod are prevented from falling into sea water; before each time the probe rod lifting hook is released, a quick clamp is arranged in time to clamp the upper part of the probe rod so as to prevent the probe rod and the probe from falling into the sea water when the probe rod clasper suddenly fails;
s5, installing an inner core of the automatic rod clamping device and a protective pipe slip to clamp the protective pipe and start to penetrate into the soft soil layer at a certain speed;
s6, when the probe rod hugger at the lower end of the protection pipe enters a hard soil layer and cannot continuously penetrate, the protection pipe is inserted and clamped by the protection pipe pad, the probe rod slips are replaced, the probe rod is clamped and pressed down, so that the pressure for pressing down the probe rod is larger than the pressure limit value of the probe rod hugger and is separated from the probe rod hugger, and the penetration is continuously performed at a certain speed, and at the moment, linkage penetration is changed into independent penetration of the probe rod until the penetration reaches the design depth.
Aiming at special stratum of Zhejiang sea area in China, the invention provides a probe rod linkage penetration static sounding test device and method for a protective pipe, which reduces complicated procedures of lifting and lowering the probe rod, the protective pipe, a drill rod and the like in the traditional operation method, can improve the penetration depth of the CPT first section of a platform, shortens the single-hole operation time and improves the platform operation efficiency; on the other hand, as the hole is not swept by a drilling machine, a methane leakage channel is not formed before static detection penetration, the problem that methane blowout affects operation in the operation process can be solved, and the method is safe and reliable and convenient to use.
Drawings
FIG. 1 is a schematic illustration of a linkage penetration process of a probe of a protective tube.
FIG. 2 is a schematic illustration of the probe rod independent penetration process.
Fig. 3 is a schematic view of the arrangement of the protective tube and the probe.
Fig. 4 is a schematic diagram of the installation of a large sleeve, a protective tube and a probe rod.
Detailed Description
The invention will be described in further detail with reference to the drawings and specific embodiments.
The utility model provides a pillar probe linkage penetration static sounding testing arrangement, including offshore platform 4, be equipped with static sounding penetration meter 5 on the offshore platform 4, static sounding penetration meter 5 top is equipped with automatic card pole ware 51 and the slips 52 that set up in automatic card pole ware 51, slips 52 include pillar slips and probe rod slips in order to change when pillar 81 and probe rod 91 run in downwards, erect big sleeve pipe 7 on the offshore platform 4, big sleeve pipe 7 endotheca is equipped with the probe rod 91 that has the protection of pillar 81, the upper end of pillar 81 is erect on big sleeve pipe 7, the lower extreme of pillar 81 is equipped with probe rod hugger 82, probe rod hugger 82 is used for hugging the probe rod 91 in the pillar 81 lower extreme, the bottom of probe rod 91 is equipped with probe 92, the probe 92 is located the below of probe rod hugger 82, wear to establish cable 6 in the probe rod 91, the lower extreme and the probe 92 of cable 6 is connected, the upper end and the static sounding testing equipment of cable 6 are connected;
the probe rod hugger 82 has a pressure limit: when the downward pressure of the probe rod 91 is larger than the pressure limit value of the probe rod enclasping device 82, the first-section expanding probe rod is separated from the enclasping device 82, and the probe rod is in a downward free movement state; when the upward pulling force of the probe rod 91 is larger than the pressure limit value of the probe rod gripper 82, the first-section expanding probe rod returns to the original position, and the probe rod 91 is clamped again.
A sleeve gasket 71 is inserted between the large sleeve 7 and the offshore platform 4, the sleeve gasket 71 being used to catch the top of the large sleeve 7 and to fix the large sleeve 7 to the offshore platform 4.
The upper part of the automatic rod clamping device 51 is provided with a quick clamp 93, and the quick clamp 93 is used for clamping the upper part of the probe rod 91 so as to prevent the probe rod 91 and the probe 92 from falling into the sea water when the probe rod clasping device 82 suddenly fails.
A protective tube pad insert 83 is inserted between the upper end of the protective tube 81 and the large sleeve 7, and the protective tube pad insert 83 is used for preventing the protective tube 81 and the probe 91 from falling into the sea water together.
The lower part of the offshore platform 4 is provided with a pile leg 41, and the bottom of the pile leg 41 is provided with a pile shoe 42.
The protective tube 81 is formed by multi-section splicing, and the probe rod 91 is formed by multi-section splicing.
The pressure limit of the probe rod hugger 82 is greater than twice the weight of the probe rod 91.
The pipe-protecting probe linkage penetration method of the static sounding test device is based on the pipe-protecting probe linkage penetration static sounding test device and comprises the following steps of:
s1, calculating the reasonable use length of the protective tube 81 according to the water depth, orderly arranging the protective tubes 81 according to the sequence of sleeving the protective tube 81 on one probe rod 91 (sleeve protective tube linkage penetration section), and independently arranging the probe rods 91 (probe rod independent penetration sections) after the length of the protective tube 81 is enough, so that the cable 6 sequentially passes through all the probe rods 91 and the protective tube 81.
S2, positioning the platform 4, installing the large sleeve 7, inserting the sleeve gasket 71 and fixing.
S3, hoisting the static detection penetrometer 5 and leveling.
S4, installing the probe 92 and the probe rod hugger 82, alternately installing the probe rod 91 and the protective tube 81 and slowly lowering until the probe 92 enters the upper soft soil layer 2. Note that: before the lifting hook of the protective tube 81 is loosened each time, the protective tube pad plug 83 is inserted into the concave slot of the protective tube 81 and is arranged at the top of the large sleeve 7, so that the protective tube pad plug and the large sleeve are prevented from falling into the sea water 1; before the lifting hook of the probe rod 91 is loosened, the quick clamp 93 is installed in time, and the probe rod 91 and the probe 92 are prevented from falling into the sea water 1 when the probe rod clasper 82 suddenly fails as a safety measure.
S5, installing an inner core of the automatic rod clamping device 51 and a protective tube slip, and clamping the protective tube 81 to start to penetrate into the soft soil layer 2 such as silt, mucky soil and the like at the speed of 2 cm/S.
S6, when the probe rod hugger 82 enters a relatively hard soil layer 3 such as silt, clay and silt and the like and cannot continuously penetrate, the protective tube 81 is clamped by the protective tube pad plug 83, the probe rod slip is replaced, the probe rod 91 is clamped and pressed down, the probe rod 91 is separated from the probe rod hugger 82, the penetration starts at the speed of 2 cm/S, and at the moment, linkage penetration is converted into independent penetration of the probe rod 91 until the penetration reaches the design depth.
And S7, sequentially pulling the probe rod 91 until the first-section expanding probe rod approaches the probe rod enclasping device 82, and increasing the pulling force of the penetrometer 5 to restore the first-section expanding probe rod 91, wherein the probe rod enclasping device 82 enclasps the probe rod 91 again.
S8, replacing the probe rod and the protective tube 81 with protective tube slips, starting to pull out the protective tube 81, and pulling out the probe rod 91 and the protective tube 81 in a linkage manner until all the probe rod and the protective tube 81 are recovered and are orderly arranged for the next use.
And S9, taking out the large sleeve 7, and moving the platform pile leg 41 and the pile shoe 42 to the next hole site.
The above detailed description is intended to illustrate the present invention by way of example only and not to limit the invention to the particular embodiments disclosed, but to limit the invention to the precise embodiments disclosed, and any modifications, equivalents, improvements, etc. that fall within the spirit and scope of the invention as defined by the appended claims.

Claims (10)

1. A protective tube probe linkage penetration static cone penetration test device is characterized in that: the static penetration test device comprises an offshore platform, wherein a static penetration instrument is arranged on the offshore platform, an automatic rod clamping device and a slip arranged in the automatic rod clamping device are arranged above the static penetration instrument, the slip comprises a protection pipe slip and a probe rod slip so as to be replaced when the protection pipe and the probe rod penetrate downwards, a large sleeve is erected on the offshore platform, a probe rod with protection pipe is sleeved in the large sleeve, the upper end of the protection pipe is erected on the large sleeve, a probe rod clamp is arranged at the lower end of the protection pipe and used for clamping a first-joint expanding probe rod in the lower end of the protection pipe, a probe is arranged at the bottom of the probe rod and is positioned below the probe rod clamp, a cable is arranged in the probe rod in a penetrating mode, the lower end of the cable is connected with the probe, and the upper end of the cable is connected with static penetration test equipment;
the probe rod hug device has a pressure limit value: when the downward pressure of the probe rod is larger than the pressure limit value of the probe rod enclasping device, the first-section expanding probe rod is separated from the enclasping device, and the probe rod is in a downward free movement state; when the upper pulling force of the probe rod is larger than the pressure limit value of the probe rod clasper, the first-section expanding probe rod returns to the original position, and the probe rod is clamped again.
2. The pipe-protecting probe linkage penetration static penetration test device according to claim 1, wherein: and a sleeve gasket is inserted between the large sleeve and the offshore platform and is used for clamping the top of the large sleeve and fixing the large sleeve to the offshore platform.
3. The pipe-protecting probe linkage penetration static penetration test device according to claim 1, wherein: the automatic rod clamping device is characterized in that a quick clamp is arranged above the automatic rod clamping device and used for clamping the upper part of the probe rod so as to prevent the probe rod and the probe from falling into sea water when the probe rod clamping device suddenly fails.
4. The pipe-protecting probe linkage penetration static penetration test device according to claim 1, wherein: a protective tube pad is inserted between the upper end of the protective tube and the large sleeve, and the protective tube pad is used for preventing the protective tube and the probe rod from falling into seawater together.
5. The pipe-protecting probe linkage penetration static penetration test device according to claim 1, wherein: and pile legs are arranged below the offshore platform.
6. The pipe-protecting probe linkage penetration static penetration test device according to claim 5, wherein: and pile shoes are arranged at the bottoms of the pile legs.
7. The pipe-protecting probe linkage penetration static penetration test device according to claim 1, wherein: the protective tube is formed by splicing multiple sections.
8. The pipe-protecting probe linkage penetration static penetration test device according to claim 1, wherein: the probe rod is formed by splicing multiple sections.
9. The pipe-protecting probe linkage penetration static penetration test device according to claim 1, wherein: the pressure limit value of the probe rod enclasping device is larger than twice of the self weight of the probe rod.
10. A linkage penetration method of a protective tube probe rod of a static cone penetration test device is characterized by comprising the following steps of: the pipe-protecting probe linkage penetration method of the static cone penetration test device is based on the pipe-protecting probe linkage penetration static cone penetration test device according to any one of claims 1-9, and comprises the following steps:
s1, calculating the service length of a protective tube according to the sea water depth, arranging a section of protective tube according to the sequence of sleeving a section of the probe rod, and after the length of the protective tube is enough, independently arranging the probe rods which independently penetrate into the section, and sequentially penetrating cables through all the probe rods and the protective tube;
s2, positioning an offshore platform, installing a large sleeve on the offshore platform, and inserting a sleeve gasket between the large sleeve and the offshore platform;
s3, hoisting a static penetration tester on the offshore platform, and leveling;
s4, installing a probe and a probe rod hugger, alternately installing a probe rod and a protective tube, and slowly lowering the probe rod by a probe rod lifting hook and a protective tube lifting hook until the probe enters an upper soft soil layer; before each time the protective tube hanging hook is released, a protective tube pad is inserted between the upper end of the protective tube and the large sleeve, so that the protective tube and the probe rod are prevented from falling into sea water; before each time the probe rod lifting hook is released, a quick clamp is arranged in time to clamp the upper part of the probe rod so as to prevent the probe rod and the probe from falling into the sea water when the probe rod clasper suddenly fails;
s5, installing an inner core of the automatic rod clamping device and a protective pipe slip to clamp the protective pipe and start to penetrate into the soft soil layer at a certain speed;
s6, when the probe rod hugger at the lower end of the protection pipe enters a hard soil layer and cannot continuously penetrate, the protection pipe is inserted and clamped by the protection pipe pad, the probe rod slips are replaced, the probe rod is clamped and pressed down, so that the pressure for pressing down the probe rod is larger than the pressure limit value of the probe rod hugger and is separated from the probe rod hugger, and the penetration is continuously performed at a certain speed, and at the moment, linkage penetration is changed into independent penetration of the probe rod until the penetration reaches the design depth.
CN202210345110.6A 2022-03-31 2022-03-31 Protective tube probe linkage penetration static cone penetration test device and method Pending CN116927164A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202210345110.6A CN116927164A (en) 2022-03-31 2022-03-31 Protective tube probe linkage penetration static cone penetration test device and method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202210345110.6A CN116927164A (en) 2022-03-31 2022-03-31 Protective tube probe linkage penetration static cone penetration test device and method

Publications (1)

Publication Number Publication Date
CN116927164A true CN116927164A (en) 2023-10-24

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ID=88376081

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202210345110.6A Pending CN116927164A (en) 2022-03-31 2022-03-31 Protective tube probe linkage penetration static cone penetration test device and method

Country Status (1)

Country Link
CN (1) CN116927164A (en)

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