CN212047814U

CN212047814U - Simple working platform for shallow sea geology CPT test

Info

Publication number: CN212047814U
Application number: CN202020532023.8U
Authority: CN
Inventors: 张嵩; 冉小荣; 刘辉喜; 李保军; 黄伟军
Original assignee: Shenzhen Traffic Utility Construction Center
Current assignee: Shenzhen Traffic Utility Construction Center
Priority date: 2020-04-13
Filing date: 2020-04-13
Publication date: 2020-12-01
Anticipated expiration: 2030-04-13

Abstract

The utility model relates to a shallow sea geology CPT experimental simple and easy work platform. The simple working platform comprises a ship anchor, a transverse connecting steel pipe, a longitudinal connecting steel pipe, an iron bucket, a static sounding platform frame, a probe rod, a counter-force system and a hole-protecting sleeve; the iron bucket is fixed with transverse connection steel pipe and longitudinal connection steel pipe and is formed marine showy operation platform, marine showy operation platform four corners is equipped with the ship anchor, the central point department of floating at marine operation platform leaves the through-hole, through-hole department installation static sounding equipment frame, be fixed with reaction system at static sounding platform frame, the hole protection sleeve pipe passes marine showy operation platform central authorities through-hole and fixes in hole static sounding platform frame, reaction system connection probe rod upper portion, probe rod sub-unit connection probe, the probe rod is located the hole protection sleeve pipe, through the extension of reaction system operation probe rod in the hole protection sleeve pipe, the probe passes through data line connection digital display appearance, form shallow sea geology CPT test system.

Description

Simple working platform for shallow sea geology CPT test

Technical Field

The utility model relates to a belong to ocean observation technical field, particularly, relate to an experimental simple and easy work platform of shallow sea geology CPT.

Background

The marine geological exploration is used as an early working link of marine engineering and aims to explore marine geological conditions, judge and determine soil body properties and the like, so that reliable and accurate exploration data are provided for marine engineering construction, and accurate reference is provided for determining a construction scheme. In terms of the current situation, marine geological exploration measures are abundant and various, and mainly include engineering geophysical prospecting, radar detection, in-situ testing, on-site drilling sampling and the like. The in-situ test is taken as a survey means for directly reflecting the properties of the soil body, and has the advantages of high accuracy, strong reference and the like.

Static sounding devices for water areas began to appear in the last 60 years, and through the development of 70 and 80 years, various types of marine static sounding equipment such as small self-elevating platforms, sleeve-type platforms, seabed sinking type, shallow hole drilling type and diving cabin type are put into test and use in shallow sea areas nowadays.

The static Cone Penetration Test (CPT for short) is an important soil body in-situ Test method for reflecting soil property change characteristics, and is a field Test method which is characterized by that a static Cone Penetration probe embedded with a special sensor is penetrated into the seabed soil body at a constant speed by means of hydraulic drive, at the same time the resistance force received by the probe in the course of Penetration is measured and recorded, and according to the measured Penetration resistance force the physical and mechanical properties of soil can be indirectly judged. With the rapid development of ocean development, the CPT technology is more and more commonly used in the field of ocean engineering at home and abroad, and plays an increasingly important role in the geological survey of ocean engineering.

The sea area CPT test differs from the land area CPT test the most: when the marine CPT is tested, the equipment cannot be in direct contact with the seabed soil body, and cannot provide stable counter force; the ocean CPT test can be influenced by factors such as sea stormy waves, tides and the like, and the working platform can be displaced in the horizontal direction, so that the test precision is reduced.

The coastal sea area has shallow seawater, and the common medium and large ships cannot meet the requirement of ship body draught and are easy to put shallow; the width of a common small ship is not enough to provide a wide operation platform, and the ship is easily influenced by wind and waves to swing left and right, so that the stability is poor, and the operation and result precision are influenced.

In the prior art, the CPT often needs stable working platforms to fix the CPT equipment in complex and various marine environments, the working platforms are often large and heavy, and the cost is very high.

Disclosure of Invention

The utility model aims to provide a: aiming at the technical problems that the existing working platform is large and heavy and the cost is very high, the simple working platform for the CPT test in the shallow sea area is designed, which has short manufacturing period, low cost and easy disassembly and assembly, can provide CPT test equipment with the advantages of overcoming sea stormy waves, providing stable counter force and greatly reducing the cost of the experimental platform under the condition of not changing the CPT test precision in the offshore sea area.

The utility model provides an above-mentioned technical problem's technical scheme as follows: a simple working platform for shallow sea geology CPT test,

the device comprises a ship anchor, a transverse connection steel pipe, a longitudinal connection steel pipe, an iron bucket, a static sounding platform frame, a probe rod, a counter-force system and a hole-protecting sleeve. The iron bucket forms marine showy operation platform after fixing with transverse connection steel pipe and longitudinal tie steel pipe with the iron drum, and transverse connection steel pipe and longitudinal tie steel pipe are connected fixedly through steel pipe fastener or iron wire ligature in the node, and the iron drum passes through iron wire ligature with the steel pipe to be connected, and marine showy operation platform four corners is equipped with the ship anchor, and the ship anchor should have sufficient gravity to reduce work platform's horizontal displacement. A flat plate is laid on a steel pipe grid formed by longitudinal connecting steel pipes and transverse connecting steel pipes, a through hole is reserved at the central position of the offshore floating operation platform, a static sounding equipment rack is installed at the through hole, the through hole is rectangular, 2 pieces of profile steel are welded on four sides of the rectangular through hole in a transverse and longitudinal mode, and the static sounding platform rack is fixed on the profile steel; a counter-force system is fixed on a frame of the static sounding platform, a hole-protecting sleeve penetrates through a central through hole of the offshore floating operation platform and is fixed on the frame of the hole-pressure static sounding platform, the counter-force system is a winch lifting mechanism, the counter-force system is connected with the upper portion of a probe rod, the lower portion of the probe rod is connected with a probe, the probe rod is located in the hole-protecting sleeve, the probe rod extends and retracts in the hole-protecting sleeve through the operation of the counter-force system, and the probe is connected with a digital display instrument through a data line to form a CPT (continuous phase testing.

The utility model has the advantages that: the utility model can reach the designated operation sea area through manual rowing, and has convenient operation, time saving, labor saving and cost saving; meanwhile, the platform is made of low-cost materials, is convenient to find, can be freely disassembled and assembled, and is convenient to operate; compared with a rented ship, the cost is low, fossil fuel is not needed in the whole operation process, and the environment is not polluted. The operating platform is about 25m²The operation space of (2) is convenient for carry out each experimental activity, and the draft of each iron bucket 60% has also increased the stability of platform, compares general small-size ship and resists the ability that stormy waves sways stronger, provides a stable operation platform for the experiment, improves experimental quality. The method is suitable for shallow sea areas with smaller stormy waves and water depth not more than 4 m.

Drawings

Fig. 1 is a plan view of the present invention;

FIG. 2 is a front view of the present invention;

fig. 3 is a left side view of the present invention;

fig. 4 is a diagram of the testing system of the present invention.

In the figure, 1-ship anchor, 2-transverse connecting steel pipe, 3-longitudinal connecting steel pipe, 4-iron barrel, 5-static sounding platform frame, 6-probe rod, 7-counter force system, 8-hole protecting sleeve, 9-probe, 10-data line and 11-digital display instrument.

Detailed Description

The present invention will be further explained with reference to the accompanying drawings.

As shown in figures 1-4, the simple working platform for the CPT test of shallow sea geology comprises a ship anchor 1, a transverse connecting steel pipe 2, a longitudinal connecting steel pipe 3, an iron bucket 4 and a pore pressure static sounding platform machine

The device comprises a frame 5, a probe rod 6, a counter-force system 7 and a hole-protecting sleeve 8, wherein the diameter of an iron barrel 4 is 50cm, the height of the iron barrel is 90cm, the diameter of a steel pipe is 48mm, and the mass of each ship anchor is 10 kg. The iron bucket is fixed by a transverse connecting steel pipe 2 and a longitudinal connecting steel pipe 3 to form the whole offshore floating operation platform, a flat plate is laid on a steel pipe grid formed by the longitudinal connecting steel pipe 3 and the transverse connecting steel pipe 2, and the transverse connecting steel pipe 2 and the longitudinal connecting steel pipe 3 are connected at a node by a fastener (or bound and fixed by an iron wire); the four ship anchors 1 are thrown to the seabed mud surface in the four corner directions of the whole offshore floating operation platform, and can better resist the influence of adverse sea conditions such as wind waves, tides and the like on the CPT test. A through hole (the same as the external size of one iron drum) is reserved at the center of the offshore floating operation platform, the through hole is rectangular, 2 steel sections are welded on four sides of the rectangular through hole in a transverse and longitudinal mode respectively, and a static sounding platform frame 5 is welded and fixed on the steel sections; thereby ensuring the stability of the piezocone penetration test platform; a counter-force system is fixed on the static sounding platform frame 5, and the hole-protecting sleeve 8 penetrates through a cavity in the center of the platform and is fixed on the pore static sounding platform frame, and is pressed below the seabed mud surface through external force and kept vertical; after the probe rod 6 is inserted into the hole-protecting sleeve 8, the top end of the probe rod 6 is connected with a counter-force system 7, the counter-force system 7 is a winch lifting mechanism, and the bottom end (including a probe 9) of the probe rod is penetrated into a seabed soil layer under the action of the counter-force system 7; a data line 10 passes through the hollow probe rod 6 to connect the probe 9 with a digital display control instrument 11.

The utility model discloses a concrete operation flow as follows:

1. laying a bottom layer steel pipe (comprising a transverse connecting steel pipe 2 and a longitudinal connecting steel pipe 3) on the land, connecting the bottom layer steel pipe and the longitudinal connecting steel pipe by using a fastener, and simultaneously carrying out preparation work such as CPT probe calibration, pore pressure element saturation and the like.

2. According to the arrangement requirement of 5 multiplied by 11, the iron buckets 4 are laid on the bottom layer steel pipe, but a space (rectangular shape) of one iron bucket 4 is required to be reserved in the right middle position, namely, the number of the iron buckets 4 is only 54 finally. Then, the top steel pipe is laid and connected and fixed with the bottom steel pipe through a fastener, and finally the foundation working platform is formed. It is worth noting that the fasteners between the steel pipes are firmly connected to ensure that the iron barrels can be tightly arranged without looseness.

3. 2 pieces of profile steel are welded at the rectangular through hole of the offshore floating operation platform, and are used for fixing the frame 5 of the piezocone penetration test platform.

4. The basic working platform is transferred to the offshore side of the shallow sea area through a wheel crane or other hoisting equipment, and then the basic working platform is driven to the area to be subjected to the CPT test in a manual operation mode.

5. When no wind wave or tide comes back, the CPT test hole is positioned, a hole site buoy is thrown to the hole site under the command of a measurer through manual paddle rowing, then a working platform is led to the hole site buoy, and boat anchors 1 are thrown at four corners respectively, so that the aim of stabilizing the platform is fulfilled, and then the hole site is corrected by the measurer until the position of a vertical shaft of the drilling machine and the position of a designed hole site are within an allowable error.

6. And vertically penetrating the hole-protecting sleeve 8 through the center of the rectangular hole in the center of the platform by using lifting equipment such as a winch and the like, inserting the hole-protecting sleeve below the mud surface of the seabed, drilling to a fixed depth according to a rule, cleaning the hole, and fixing the hole-protecting sleeve 8 on the frame 5 of the piezocone penetration test platform.

7. A static sounding platform frame 5 is fixed on the H-shaped steel, a probe 9 which is ready to work is connected with a data line 10 in a probe rod 6 by utilizing lifting equipment such as a winch and the like and extends into a hole protecting sleeve 8, the upper part of the probe rod 5 is connected with a counter-force system, and the other end of the data line 10 in the probe rod is connected with a digital display instrument 11 on the bank.

8. After the CPT simple working platform is completed, a CPT test experiment is performed next, test parameters and a debugging system are set, and data is acquired in a trial mode to determine the validity of data so that the CPT is in a normal operation state.

9. After debugging all parameters of the piezocone penetration test equipment, the probe 9 is penetrated into the seabed soil layer according to the standard speed under the action of the counterforce system 7, the normal penetration speed is kept within the range of 20 mm/s +/-5 mm/s, the probe is propelled by using a winch, and a group of data is taken every 5cm of penetration.

10. To facilitate later data collection and real-time monitoring, the data line 10 may be extended and the digital display 11 may be installed in a workstation or an office to prevent the data collection from being inconvenient by the harsh environment.

11. And stopping penetration at the depth position where the pore pressure dissipation experiment needs to be carried out, and recording the time dissipation process of the pore pressure in real time until the pore pressure is close to the hydrostatic pressure.

12. And after the preset depth is reached, stopping the experiment, sequentially pulling out the probe rods 6 through the counterforce system 7, and pulling out the hole-protecting sleeve from the mud surface by using lifting equipment such as a winch and the like.

It will be understood that modifications and variations can be made by persons skilled in the art in light of the above teachings and all such modifications and variations are intended to be included within the scope of the invention as defined in the appended claims.

Claims

1. A simple working platform for a CPT test in shallow sea geology is characterized by comprising a ship anchor, a transverse connecting steel pipe, a longitudinal connecting steel pipe, an iron bucket, a static sounding platform frame, a probe rod, a counter-force system and a hole-protecting sleeve; the iron bucket is fixed with transverse connection steel pipe and longitudinal connection steel pipe and is formed marine showy operation platform, marine showy operation platform four corners is equipped with the ship anchor, the central point department of floating at marine operation platform leaves the through-hole, through-hole department installation static sounding equipment frame, be fixed with reaction system at static sounding platform frame, the hole protection sleeve pipe passes marine showy operation platform central authorities through-hole and fixes in hole static sounding platform frame, reaction system connection probe rod upper portion, probe rod sub-unit connection probe, the probe rod is located the hole protection sleeve pipe, through the extension of reaction system operation probe rod in the hole protection sleeve pipe, the probe passes through data line connection digital display appearance, form shallow sea geology CPT test system.

2. The simple working platform for the CPT test of the shallow sea geology according to claim 1, characterized in that the transverse connecting steel pipe and the longitudinal connecting steel pipe are fixedly connected at the node through steel pipe fasteners or iron wire binding, and the iron bucket is connected with the steel pipe through iron wire binding.

3. The simple working platform for the CPT test of the shallow sea geology according to claim 1, characterized in that a flat plate is paved on a steel pipe grid formed by the longitudinal connecting steel pipes and the transverse connecting steel pipes.

4. The simple working platform for the CPT test of the shallow sea geology according to claim 1, characterized in that the through hole is rectangular, 2 steel bars are welded on four sides of the rectangular through hole respectively in the transverse direction and the longitudinal direction, and a frame of the static sounding platform is fixed on the steel bars.

5. The shallow sea geology CPT test simple work platform of claim 1, characterized in that, the reaction system is hoist elevating system.