阅读说明：本技术 一种弹射式t型全流贯入装置 (A kind of ejection type T-type flows perforation device entirely ) 是由 乔欢欢 蔡国军 荣琦 刘东明 武猛 于 2019-08-19 设计创作，主要内容包括：本发明是一种弹射式T型全流贯入装置,该装置的由三部分组成：第一部分的弹射装置(1)位于上部,第二部分的导弹式尾翼(2)位于中部,第三部分的T型全流探头(3)位于下部。通过弹射装置提供T型全流贯入仪的初始动能,能够有效提高贯入仪的贯入深度,四页导弹式尾翼能够提高贯入仪的稳定性和贯入点精度,增加加速度传感器、力传感器、倾斜传感器,孔压传感器可以进一步提高T型全流贯入仪水下原位测试精度。该贯入装置用于水下超软土强度特性测试,具有有快捷、经济、易操作、准确率高等优点,是评价水下超软土强度特强有力的原位测试工具。(The present invention is that a kind of ejection type T-type flows perforation device entirely, the device consists of three parts: the catapult-launching gear (1) of first part is located at top, the guided missile formula empennage (2) of second part is located at middle part, and the T-type of Part III flows probe (3) entirely and is located at lower part.The initial kinetic energy that T-type flows penetrometer entirely is provided by catapult-launching gear, the depth of penetration of penetrometer can be effectively improved, the guided missile formula empennages of page four can be improved the stability and injection point precision of penetrometer, increase acceleration transducer, force snesor, inclination sensor, sensor for pore water pressure can be further improved T-type and flow penetrometer underwater in-situ measuring accuracy entirely.The perforation device is tested for underwater ultra-soft soil strength characteristics, there is quick, economic, easy to operate, high accuracy for examination, is the special strong in-situ test tool of the underwater ultra-soft soil intensity of evaluation.)

1. a kind of ejection type T-type flows perforation device entirely, it is characterised in that: the device consists of three parts:

First part is catapult-launching gear (1), including launching cradle (1a), and elastic force ring (1b) launches pedestal (1c), is launched slip pipe (1d) With elastic sensor (1e)；Wherein, elastic force ring (1b) is located at the top of ejection pedestal (1c), launches slip pipe (1d) and elastic force sensing Device (1e) is located on the central axes of catapult-launching gear (1)；

Second part is the guided missile formula empennage (2) for stablizing penetrometer injection direction, and tail portion is four page empennages (2a), and inside is equipped with Coaxial cable (2b) transmits signal and data, and coaxial cable (2b) connects internal Digital To Analog converter (2c), and lower bottom part connects for screw thread Head (2d)；

Part III is that T-type flows probe (3) entirely, and the connecting rod (3a) including connecting guided missile formula empennage (2), connecting rod bottom is furnished with Slant angle sensor (3b), acceleration transducer (3c) and sensor for pore water pressure (3d)；

The catapult-launching gear (1) of first part is located at top, and the guided missile formula empennage (2) of second part is located at middle part, the T of Part III Type flows probe (3) entirely and is located at lower part.

2. a kind of ejection type T-type as described in claim 1 flows perforation device entirely, it is characterised in that: catapult-launching gear (1) is according to just Initiating energy demand configures the elastic force ring (1b) of different number.

3. a kind of ejection type T-type as described in claim 1 flows perforation device entirely, it is characterised in that: the elastic force ring (1b) It is connect with ejection pedestal (1c) using hook and loop type.

4. a kind of ejection type T-type as described in claim 1 flows perforation device entirely, it is characterised in that: the ejection slip pipe The tail portion of (1d) and guided missile formula empennage (2) is using the embedded connection that can be popped up.

5. a kind of ejection type T-type as described in claim 1 flows perforation device entirely, it is characterised in that: the guided missile formula empennage (2) tail portion uses four page empennages (2a), and single empennage is right angled triangle.

6. a kind of ejection type T-type as described in claim 1 flows perforation device entirely, it is characterised in that: the second part is led Bullet formula empennage (2) is connect with nipple (2d) with the connecting rod (3a) that Part III T-type flows probe (3) entirely.

7. a kind of ejection type T-type as described in claim 1 flows perforation device entirely, it is characterised in that: the T-type flows probe entirely (3), long 100-500mm, diameter 10-80mm, projected area 10-400cm²。

Technical field

The present invention relates to a kind of ejection type T-types to flow perforation device entirely, is strong for evaluating underwater ultra-soft soil intensity extra-heavy In-situ test tool, belong to rock-soil engineering in-situ testing field.

Background technique

Coastal and lacustrine deposit area is widely present a large amount of ultra-soft soil, and this ultra-soft soil water content is high (being greater than 100%), In liquid-plastic state, have the characteristics that high-compressibility, extremely low intensity and high sensitivity, and have structural, such ultra-soft soil is almost It can not be sampled and laboratory test, existing prospecting measuring technology are difficult to evaluate its intensity and deformation behaviour, original position can only be passed through Test method.Including vane shear test, the test of CPTU static sounding, ball-type and T-type flow full static sounding test and from It is tested by falling body type injection.And weak soil intensive action inconvenience is tested in vane shear test under water and test value is discontinuous；By Under high confining pressure stress condition under water, measurement of traditional CPTU instrument probe load cell in penetration process for ultra-soft soil Accuracy greatly reduces；Simultaneously can not correctly quantitative description cladding earth pressure effect, wanted so being unable to satisfy engineering design It asks.Randolph etc. is proposed based on full-flow theory a kind of novel complete by the way of increasing penetrometer projected area Cone penetrometer (ball-type and T-type flow static sounding entirely) is flowed to solve the above problems.When full stream cone penetrometer is by passing through underwater ultra-soft soil, The soil flow for being similar to viscous fluid state is generated around probe around detecting head surface, is obtained by the friction of detecting head surface and soil flow Obtain the undrained shear strength of ultra-soft soil.But static sounding requires loading device to measure, and scene is surveyed on the water The exploration vessel of profession is needed during surveying, it is costly.And free fall type injection test is by freely falling body mode power The penetrometer that injection is measured under water, without other loading devices.Mainly there is free fall type taper injection at present Two kinds of forms of instrument and formula spherical shape penetrometer, but current free fall type penetrometer depth of penetration is limited, and cannot be fine The stress of simulation bottom pipeline.

Summary of the invention

Technical problem: the object of the present invention is to provide a kind of ejection type T-types to flow perforation device entirely, which passes through ejection dress Set and T-type is provided flows the initial kinetic energy of penetrometer entirely, carry out dynamic driving, can simulation submerged pipe line very well stress, And the depth of penetration of penetrometer can be effectively improved, the guided missile formula empennages of page four can be improved the stability and injection point of penetrometer Precision increases acceleration transducer, sensor for pore water pressure can be further improved T-type and flow penetrometer underwater in-situ measuring accuracy entirely. The perforation device is tested for underwater ultra-soft soil strength characteristics, is had quick, economic, easy to operate, high accuracy for examination, is to comment The strong in-situ test tool of the underwater ultra-soft soil strength characteristics of valence.

Technical solution: to solve the shortcomings of the prior art, the present invention provides a kind of ejection type T-types to flow injection dress entirely It sets, which consists of three parts:

First part is catapult-launching gear, including launching cradle, and elastic force ring launches pedestal, launches slip pipe and elastic sensor；Its In, elastic force ring is located at the top of ejection pedestal, launches slip pipe and elastic sensor is located on the central axes of catapult-launching gear；

Second part is the guided missile formula empennage for stablizing penetrometer injection direction, and tail portion is four page empennages, and inside is equipped with same Shaft cable transmits signal and data, and coaxial cable connects internal Digital To Analog converter, and lower bottom part is nipple；

Part III is that T-type flows probe entirely, and the connecting rod including connecting guided missile formula empennage, connecting rod bottom is furnished with inclination angle Sensor, acceleration transducer and sensor for pore water pressure；

The catapult-launching gear of first part is located at top, and the guided missile formula empennage of second part is located at middle part, the T-type of Part III Full stream probe is located at lower part.

Catapult-launching gear configures the elastic force ring of different number according to initial kinetic energy demand.

The elastic force ring is connect with ejection pedestal using hook and loop type.

The tail portion of the ejection slip pipe and guided missile formula empennage is using the embedded connection that can be popped up.

The tail portion of the guided missile formula empennage uses four page empennages, and single empennage is right angled triangle.

The second part guided missile formula empennage is connect with nipple with the connecting rod that Part III T-type flows probe entirely.

The T-type flows probe, long 100-500mm, diameter 10-80mm, projected area 10-400cm entirely²。

The speed v that ejection type T-type flows perforation device entirely can be integrated to obtain by the acceleration a that acceleration transducer measures:

Depth of penetration z can be integrated to obtain by speed v:

Existing research shows to flow injection probe entirely due to T-type in acceleration (or deceleration) motion process, will drive periphery soil Body accelerates (or slow down) movement, it is therefore desirable to the effect for considering additional mass m*, by following formula (calculated:

m^*=C_mm_soil (3)

Wherein, C_mFor mass coefficient；m_soilFlow injection probe entirely for T-type and arrange the quality of the soil body, according to formula (4) into Row calculates

m_soil=V_T-barρ_soil (4)

Wherein, V_T-barFlow the volume that injection probe arranges the soil body, ρ entirely for T-type_soilFor the density of the soil body.

So the effective mass m that T-type flows injection probe entirely can be calculated by following formula:

M=m^*+m_soil (5)

Penetration resistance q_t,,dThe effective mass m that injection probe can be flowed entirely according to T-type is obtained multiplied by the acceleration a of measurement:

Wherein, v is the speed that ejection type T-type flows perforation device entirely；Z is depth of penetration；W_bInjection is flowed entirely for ejection type T-type The buoyant weight of device in water；M is the effective mass that T-type flows injection probe entirely；F_DFor towrope resistance (because soil body inertia generates)；F_b It is equal to the effective weight for arranging soil for buoyancy；R_f,ipThe strain rate coefficient of penetration resistance；N_k,T-barFlow injection probe entirely for T-type Bearing capacity coefficient；As is that ejection type T-type flows the projected area that perforation device T-type flows probe entirely entirely.

The calculation method of soil body towrope resistance is identical as the calculation method of fluid drag resistance.

Wherein, ρ_sFor soil body saturated density；C_dFor drag coefficient.

The strain rate coefficients R of penetration resistance_f,tip, it is calculated by following formula:

Wherein, γ & be strain rate,It is strain rate parameter for the reference strain rate of undrained shear strength, β.

The undrained shear strength s of the soil body_uIt needs to deduct towrope resistance and soil strength is generated because of strain rate effect Reduction, can be calculated as follows:

Wherein, q_c,dFor the penetration resistance of measurement；u₂To measure or estimate the pore pressure at cone shoulder；α_cone: it is unequal The area ratio；σ_v0For overlying stress；q_D(it is equal to F for towrope resistance_D/As)；R_{F, tip}For the strain rate coefficient of penetration resistance； N_k,T-barFlow injection probe coefficient of bearing caoacity entirely for T-type；q_net,dFlow the net injection of power of perforation device generation entirely for ejection type T-type Resistance；q_net,sFlow the net penetration resistance of static(al) injection entirely for T-type.

The utility model has the advantages that compared with prior art, present invention has the advantage that

It is to evaluate underwater ultra-soft in exploration of geotechnical engineering practice that a kind of ejection type T-type provided by the invention flows perforation device entirely Native strength characteristics provides strong in-situ test tool.The initial kinetic energy that T-type flows penetrometer entirely, energy are provided by catapult-launching gear The depth of penetration of penetrometer is enough effectively improved, the guided missile formula empennages of page four can be improved the stability and injection point precision of penetrometer, Increase acceleration transducer, force snesor, inclination sensor, sensor for pore water pressure can be further improved T-type and flow penetrometer water entirely Lower in-situ test precision is for evaluating the special strong in-situ test tool of underwater ultra-soft soil intensity.

It is provided by the invention that the strong in-situ test tool of underwater ultra-soft soil strength characteristics, apparatus structure letter can be evaluated Well, easy to use, test speed is fast, and testing efficiency is high, and test result is accurate and reliable, reproducible for single, quality control.

Detailed description of the invention

Fig. 1 is the organigram that a kind of ejection type T-type provided by the invention flows perforation device component arrangement entirely；

Have in figure: catapult-launching gear 1, launching cradle 1a, elastic force ring 1b launch pedestal 1c, launch slip pipe 1d and elastic sensor 1e；Guided missile formula empennage 2, four page empennage 2a, coaxial cable 2b, digital analog converter 2c and nipple 2d；T-type flows probe 3 entirely, Including connecting rod 3a, slant angle sensor 3b, acceleration transducer 3c and sensor for pore water pressure 3d.

Specific embodiment