CN105839608A - Hammering method for dynamic penetration test and in-hole hammering device thereof - Google Patents
Hammering method for dynamic penetration test and in-hole hammering device thereof Download PDFInfo
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- CN105839608A CN105839608A CN201610184026.5A CN201610184026A CN105839608A CN 105839608 A CN105839608 A CN 105839608A CN 201610184026 A CN201610184026 A CN 201610184026A CN 105839608 A CN105839608 A CN 105839608A
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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
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- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Soil Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
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- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
Abstract
The invention discloses a hammering method for dynamic penetration test and an in-hole hammering device thereof. The in-hole hammering device is arranged between a penetration rod and a standard penetrator or a dynamic probe; the device is provided with a center penetrating hammer promoted by a linear motor and capable of automatically hammering, and a drive for receiving mud pulse to control starting of the linear motor; the lifting of the center penetrating hammer, an automatic hammering mechanism and the drive are arranged in a sealing structure; the hammering force of the center penetrating hammer is transferred to the standard penetrator or the dynamic probe through a hammer pad; and the gravitational potential energy of an in-hole center penetrating hammer is the same with the gravitational potential energy of the center penetrating hammer operated on the ground. The in-hole hammering device solves the hammering energy loss caused by bending or friction of the penetration rod more thoroughly, guarantees accuracy of testing data, and needs no rod length correction in later data arrangement process. Because of setting of the sealing structure, the in-hole hammering device needs no correction of underground water for the testing data when performing the dynamic penetration test below a underground water level.
Description
Technical field
The invention belongs to dynamic sounding in situ, particularly relate to the hammering of a kind of dynamic penetration test
Hammering device in method and hole thereof.
Background technology
It is the method for testing that dynamic sounding is conventional in situ that standard penetration test (SPT) and circular cone move trial and error test,
Its capital equipment includes standard penetrometer or dynamic probe, sounding rod and punching hammer, conventional punching hammer
Hammer weight 63.5kg, freely falls away from 76cm.
Above-mentioned dynamic penetration test generally uses ground free-falling hammer mode, punching in operation process
Hammer is all the time more than ground, and hammering energy is delivered to standard penetrometer or dynamic spy by sounding rod
Head.
When MTD is deeper, due to sounding rod bending or sounding rod and hole wall friction
The loss of hammering energy will be caused, cause the energy being delivered to standard penetrometer or dynamic probe with
Ground hammering energy changes, and causes test data inaccurate, therefore at later data
Need during arrangement to carry out bar length correction.If standard penetration test (SPT) or circular cone move trial and error test
Carry out below level of ground water, then also need to carry out the correction of influence on groundwater.
In addition, current specifications only specifies above-mentioned dynamic penetration test be applicable to 20 meters deep
In the range of degree, significantly limit the range of application of dynamic penetration test.
Summary of the invention
The present invention is directed to above-mentioned the deficiencies in the prior art and disclose the hammer of a kind of dynamic penetration test
Hit hammering device in method and hole thereof.
The hammering method of the dynamic penetration test of the present invention, including: at sounding rod and Standard piercing
Hammering device in providing holes between device or dynamic probe, in described hole, hammering device is arranged by straight-line electric
Motivation promote and can in the hole of automatic drop hammer punching hammer and reception mud-pulse and control straight-line electric
The driver that motivation starts, mud-pulse is transmitted in the driving of hammering device in hole by sounding rod
Device, in described hole, lifting, automatic drop hammer mechanism and the driver of punching hammer arrange sealing structure,
The hammer force that in hole, punching hammer drops hammer is transmitted to standard penetrometer or dynamic probe by pallet, in hole
The gravitional force of punching hammer is identical with the gravitional force operating in ground above punching hammer respectively.
The device that described mud-pulse is made up of slush pump, mud pulse generator and Pressure gauge produces
Raw.
The described hammer operating in ground above punching hammer is heavily respectively 10kg and 63.5kg.
Hammering device in the hole of the present invention, including: sounding rod, the mud being sequentially connected with by pipeline
Pump, mud pulse generator and Pressure gauge, feature is, mud pulse generator output pipe with
Sounding rod connects, and in hole, hammering device is by outer cylinder body, the sounding rod joint of connection outer cylinder body upper end
The overcoat constituted with the base with centre bore of connector drum lower end, base supports inner barrel
With the pallet being positioned in inner barrel, pallet upper surface center is provided with guide rod, and pallet lower surface is provided with
The dowel steel being connected mutually with centre hole of base, dowel steel lower end and standard penetrometer or dynamic probe phase
Connect, inner barrel, guide rod and dowel steel concentric, described guide rod be by the major diameter bar of bottom,
The reducing bar of the smaller diameter rods on top and connection major diameter bar and smaller diameter rods is constituted, and pallet supports
Porose interior punching is hammered into shape, and in promoting the hole of the state that puts in place, punching hammers its hammer end into shape to leading corresponding to pallet
Pole length be its freely fall away from, periphery and the inner barrel inwall sliding fit of punching hammer, institute in hole
State inner barrel top and be from top to bottom sequentially provided with driver, battery and linear motor, described interior
Being provided with sealing ring between cylinder upper end and driver edge edge, driver control end is connected to straight-line electric
Power line between motivation and battery, linear motor lower end is provided with the suspension ring of wire rope hanging,
It is provided with interval, described suspension ring circumference between convex edge in the centre bore upper end of punching hammer in suspension ring and hole
Symmetrical pair of automatic kayser of ball-type, unlocking mechanism, decline put in place state time suspension ring its from
Dynamic kayser, outside ball and the bottom side of convex edge in punching hammer centre bore upper end in hole of unlocking mechanism
Engaging, inner side ball engages with the major diameter bar part of guide rod, the suspension ring under lifting state
With the smaller diameter rods part of guide rod to its automatic kayser time corresponding, unlocking mechanism inner side ball with
The smaller diameter rods part of guide rod engages, outside ball and convex edge in punching hammer centre bore upper end
Bottom side is separated.
In the hole of the present invention, hammering device may also take on techniques below measure:
Described inner barrel bottom fixes with the annular ledge of base, and its junction surface is provided with sealing
Circle.
Being provided with water ring between outer cylinder body and the inner barrel of described overcoat, base is provided with water hole.
In described hole, punching hammer hammer weight 10kg, freely falls away from 0.5 meter.
In described hole, punching hammer hammer weight 15kg, freely falls away from 3.217 meters.
Beneficial effects of the present invention and advantage be: the present invention is to hammer into shape in hammering method in hole and hole thereof
Hit device and substitute ground free-falling hammer mode and the device thereof of existing conventional dynamic penetration test.By
Being limited in the linear motor pulling force factor by interior use of holing, its pulling force maximum only has
15kg, for this present invention according to gravitional force expression formula: Ep=mgh, make in hole punching hammer with
It is operated in the wearing in addition to superduty dynamic sounding punching hammer (hammer weight 120kg) on more than ground
Heart hammer gravitional force is identical, and in formula, Ep is gravitional force, and conventional m is punching hammer quality (kg),
G be gravity coefficient (N/kg), h be punching hammer distance pallet height (m).
On ground, the conventional punching hammer hammer in addition to superduty dynamic sounding punching is hammered into shape is heavily respectively
Light-duty 10kg and heavy 63.5kg.
If punching hammer hammer is heavily 10kg in hole, tests it for GCO probe GCO and freely fall
Away from being still 0.5 meter.
If punching hammer hammer is heavily 15kg in hole, move for standard penetration test (SPT) and heavy cone
During trial and error test, calculate it according to gravitional force expression formula and freely fall away from should be 3.217 meters.
The sounding rod of the present invention does not transmit hammer force, solving because sounding rod deformation is curved more thoroughly
The hammering energy loss that bent or sounding rod causes with hole wall friction, it is ensured that the standard of test data
Really, therefore during later data arranges, it is made without bar length correction.
In the hole of the present invention, hammering device arranges the sealing structure for punching hammer hoisting mechanism, because of
When this carries out dynamic penetration test below level of ground water, its test data are also without carrying out ground
The correction of lower water impact.The present invention is using existing mud-pulse device as the opening of hammering device in hole
Dynamic signal, has the feature of convenient and reliable operation.The present invention has simple in construction, easy to operate
With test data outstanding advantages accurately and reliably.
Accompanying drawing explanation
Accompanying drawing 1 is embodiment of the present invention structural representation.
Accompanying drawing 2 is one of hammering device structural representation in hole.
Accompanying drawing 3 is in hole the two of hammering device structural representation.
Accompanying drawing 4 is the suspension ring double automatic kayser of ball, unlocking mechanism structural representations.
Labelling in figure: 1 dynamic probe, hammering device in 2 holes, 2-1 sounding rod joint, outside 2-2
Cylinder, 2-3 base, 2-3-1 water hole, 2-3-2 annular ledge, 2-4 dowel steel, 2-5
Pallet, 2-6 punching hammer, 2-7 guide rod, 2-8 inner barrel, 2-9 suspension ring, the double ball of 2-9-1
The automatic kayser of formula, unlocking mechanism, 2-9-1a position-limiting tube, ball inside 2-9-1b, 2-9-1c
Outside ball, 2-9-1d hole slot, 2-10 steel wire rope, 2-11 linear motor, 2-12 battery,
2-13 driver, 2-14 sealing ring, 2-15 crosses water ring, 3 sounding rods, 4 slush pumps, 5 mud
Slurry pulse generator, 6 Pressure gauges, 7 faucet, 8 blow count devices, 9 depth-registering devices.
Detailed description of the invention
The present invention is further illustrated below in conjunction with embodiment and accompanying drawing thereof.
As it is shown in figure 1, hammering device is to arrange on ground to be connected successively by pipeline in the hole of the present invention
Slush pump 4, mud pulse generator 5 and the Pressure gauge 6 connect, mud pulse generator 5 is defeated
Go out pipeline to be connected with sounding rod 3 by faucet 7.
Hammering device 2 in providing holes between sounding rod 3 and dynamic probe 1 or standard penetrometer.
Base 2-3 supports inner barrel and the pallet 2-5 being positioned in inner barrel, on pallet 2-5
Surface is provided with guide rod 2-7, and pallet 2-5 lower surface is provided with the power transmission being connected mutually with centre hole of base
Bar 2-4, dowel steel lower end threadeds with dynamic probe 1 or standard penetrometer, inner barrel 2-8,
Guide rod 2-7 and dowel steel 2-4 concentric.
Guide rod 2-7 is by the major diameter bar of bottom, the smaller diameter rods on top and to connect major diameter bar
Constituting with the reducing bar of smaller diameter rods, pallet 2-5 supports has punching to hammer 2-6 into shape, outside punching hammer
Disc and inner barrel 2-8 inwall sliding fit also are allowed to move vertically.
Inner barrel 2-8 top is from top to bottom sequentially provided with driver 2-13, battery 2-12 and straight
Interior convex edge and driver 2-13 edge that line motor 2-11, inner barrel 2-8 upper end is arranged it
Between be provided with sealing ring 2-14.Driver 2-13 controls end and is connected to linear motor 2-11 and electricity
Power line between the 2-12 of pond.
Linear motor 2-11 lower end is provided with by the suspension ring of symmetrically arranged steel wire rope 2-10 hanging
It is provided with interval between convex edge in the centre bore upper end of 2-9, suspension ring 2-9 and punching hammer 2-6.
As shown in Figure 3,4, symmetrical four of the prior art pair of suspension ring 2-9 periphery
The automatic kayser of ball-type, unlocking mechanism 2-9-1, this mechanism is by double balls i.e. inner side ball 2-9-1b
The hole slot 2-9-1d composition of balls double with outside ball 2-9-1c and receiving, hole slot external port
Width is less than outside ball diameter, and inner side ball is spacing by position-limiting tube 2-9-1a.At Fig. 1 mud
When pulse generator 5 is closed mode, the smaller diameter rods part pair of suspension ring 2-9 and guide rod 2-7
Should, outside ball is positioned at the hole slot 2-9-1d bottom land outside the ball of inner side.
After mud pulse generator 5 starts, suspension ring 2-9 declines, inner side during declining
Ball 2-9-1b is contacted with major diameter bar by the reducing bar of guide rod 2-7 and makes outside ball 2-9-1c
The centre bore upper end being partially larger than suspension ring and punching hammer 2-6 moved outside outer shifting, and outside ball
Spacing distance between interior convex edge.When suspension ring 2-9 continues to lower into punching hammer 2-6 centre bore,
Outside ball 2-9-1c by punching hammer centre bore upper end in convex edge stop and at hole slot 2-9-1d
Move to the position of c ' in, make suspension ring enter punching hammer centre bore smoothly.As outside ball 2-9-1c
Declined after putting in place by the i.e. suspension ring in convex edge in the centre bore upper end of punching hammer 2-6, this interior convex edge
Bottom is fallen after rise for outside ball and is provided space, the automatic kayser of the most double ball-types, unlocking mechanism
Become card lock status, i.e. suspension ring to be connected for kayser with punching hammer by double balls.At straight line electric
Machine 2-11 automatic reverse motion time suspension ring drive punching hammer enter lifting state, when suspension ring with lead
The smaller diameter rods part of bar is to the inner side ball 2-9-1b of its automatic kayser, unlocking mechanism during correspondence
Engaging with the smaller diameter rods part of guide rod 2-7, outside ball 2-9-1c is hammered into shape centre bore by punching
The extruding of convex edge in upper end and depart from its bottom side, now punching hammer 2-6 automatic unlocking falls.
In the hole of embodiment, punching hammer hammer is heavily 10kg, when moving trial and error test for light-duty circular cone,
Promoting punching in the hole that puts in place and hammering its hammer end into shape is that it freely falls to the guide rod length corresponding to pallet
Away from, freely fall away from for 0.5 meter.
Hammer be heavily 15kg hole in punching hammer, for the dynamic spy of standard penetration test (SPT) and heavy cone
During test, promoting punching in the hole that puts in place and hammering its hammer end into shape is it to the guide rod length corresponding to pallet
Freely fall away from, freely fall away from for 3.217 meters.
The using method of present invention embodiment as shown in Figure 1 is as follows:
S1: utilize drilling tool to be drilled at the test above 15cm of soil layer absolute altitude, remove surflaes；Clear hole
Time, should avoid testing soil layer and be disturbed.
S2: check criteria penetrator or dynamic probe and hammering device in hammering device, hole in hole with
Whether sounding rod connects, and is then put into by hammering device in standard penetrometer or dynamic probe and hole
In hole, it is to avoid at the bottom of impact opening, and keep the perpendicularity of described connection；Standard penetrometer or dynamic spy
After head is put at the bottom of hole, deep by depth-registering device 9 bioassay standard penetrator or dynamic probe place
Degree, and ensure that at the bottom of hole, surflaes thickness is not more than 10cm.
S3: open slush pump, regulates pulse generator, and in hole, the driver in hammering device connects
Receiving pulse signal and i.e. connect linear motor battery supply, punching is hammered into shape by linear motor etc.
Structure carries out standard penetration test (SPT) or circular cone moves trial and error test, records hammering by blow count device 8
Number, records the degree of depth after hammering by depth-registering device 9.Blow count device 8 and depth-registering device
The connection of 9 uses and is same as prior art.
S4: after being completed, closes mud pulse generator and slush pump, proposes hammering in hole
Device and standard penetrometer or dynamic probe.
S5: repeat S1～S4 step, the standard penetration test (SPT) or the circular cone that carry out next degree of depth move
Trial and error test, until desired depth.
Below it is only presently preferred embodiments of the present invention, not the present invention is done any restriction.
Claims (8)
1. the hammering method of a dynamic penetration test, it is characterised in that including: at sounding rod
And hammering device in providing holes between standard penetrometer or dynamic probe, in described hole, hammering device sets
Put promoted by linear motor and can in the hole of automatic drop hammer punching hammer and reception mud-pulse and
Controlling the driver that linear motor starts, mud-pulse is transmitted in hammering in hole by sounding rod
The driver of device, in described hole, lifting, automatic drop hammer mechanism and the driver of punching hammer are arranged
Sealing structure, the hammer force that in hole, punching hammer drops hammer is transmitted to standard penetrometer or dynamic by pallet
Probe, in hole the gravitional force of punching hammer respectively with the gravitational potential operating in ground above punching hammer
Can be identical.
The hammering method of dynamic penetration test the most according to claim 1, its feature exists
In: the device that described mud-pulse is made up of slush pump, mud pulse generator and Pressure gauge produces
Raw.
The hammering method of dynamic penetration test the most according to claim 1, its feature exists
In: described in operate in the hammer of ground above punching hammer and be heavily respectively 10kg and 63.5kg.
Hammering device in hole the most according to claim 1, including sounding rod, by pipeline
Slush pump, mud pulse generator and the Pressure gauge being sequentially connected with, it is characterised in that: mud arteries and veins
Rushing generator output pipe to connect with sounding rod, in hole, hammering device is by outer cylinder body, connection urceolus
Outside the sounding rod joint of body upper end and the base with centre bore of connector drum lower end are constituted
Set, base supports inner barrel and the pallet being positioned in inner barrel, and pallet upper surface center is provided with
Guide rod, pallet lower surface is provided with the dowel steel being connected mutually with centre hole of base, dowel steel lower end with
Standard penetrometer or dynamic probe are connected, inner barrel, guide rod and dowel steel concentric, described in lead
Bar is by the major diameter bar of bottom, the smaller diameter rods on top and to connect major diameter bar and smaller diameter rods
Reducing bar constitute, pallet support porose interior punching hammer, promote put in place state hole in punching hammer
Its hammer the end to guide rod length corresponding to pallet be its freely fall away from, in hole punching hammer into shape periphery
With inner barrel inwall sliding fit, described inner barrel top is from top to bottom sequentially provided with driver, electricity
Pond and linear motor, be provided with sealing ring between described inner barrel upper end and driver edge edge, drive
Dynamic device controls the power line that end is connected between linear motor and battery, linear motor lower end
It is provided with in the suspension ring of wire rope hanging, suspension ring and hole in the centre bore upper end of punching hammer between convex edge
It is provided with interval, described suspension ring circumference symmetrical pair of automatic kayser of ball-type, unlocking mechanism, under
Its automatic kayser of suspension ring when dropping to state, outside ball and the punching hammer in hole of unlocking mechanism
In centre bore upper end, the bottom side of convex edge engages, the major diameter bar part phase of inner side ball and guide rod
Engage, the smaller diameter rods part of the suspension ring under lifting state and guide rod to its automatic kayser time corresponding,
The inner side ball of unlocking mechanism engages with the smaller diameter rods part of guide rod, outside ball and punching
In hammer centre bore upper end, the bottom side of convex edge is separated.
Hammering device in hole the most according to claim 4, it is characterised in that: in described
Cylinder bottom fixes with the annular ledge of base, and its junction surface is provided with sealing ring.
Hammering device in hole the most according to claim 4, it is characterised in that: outside described
Being provided with water ring between outer cylinder body and the inner barrel of set, base is provided with water hole.
Hammering device in hole the most according to claim 4, it is characterised in that: described hole
Interior punching hammer hammer weight 10kg, freely falls away from 0.5 meter.
Hammering device in hole the most according to claim 4, it is characterised in that: described hole
Interior punching hammer hammer weight 15kg, freely falls away from 3.217 meters.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610184026.5A CN105839608B (en) | 2016-03-28 | 2016-03-28 | Hammering device in a kind of hammering method of dynamic penetration test and its hole |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610184026.5A CN105839608B (en) | 2016-03-28 | 2016-03-28 | Hammering device in a kind of hammering method of dynamic penetration test and its hole |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105839608A true CN105839608A (en) | 2016-08-10 |
| CN105839608B CN105839608B (en) | 2017-10-27 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610184026.5A Active CN105839608B (en) | 2016-03-28 | 2016-03-28 | Hammering device in a kind of hammering method of dynamic penetration test and its hole |
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Cited By (9)
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|---|---|---|---|---|
| CN107152018A (en) * | 2017-07-05 | 2017-09-12 | 中冶集团武汉勘察研究院有限公司 | A kind of safe standard penetration test (SPT) device and method of testing |
| CN108375395A (en) * | 2018-03-22 | 2018-08-07 | 中国铁路设计集团有限公司 | The underground acquisition component of power and speed signal in standard penetration test (SPT) |
| CN109555099A (en) * | 2019-01-07 | 2019-04-02 | 大连理工大学 | A kind of novel sea soil is complete to flow penetration sounding system and test method |
| CN110042823A (en) * | 2019-05-28 | 2019-07-23 | 南京南大岩土工程技术有限公司 | A kind of multifunction dynamic feeler inspection automatic production record and test method based on Internet of Things |
| CN110284485A (en) * | 2019-07-27 | 2019-09-27 | 山东路达试验仪器有限公司 | A kind of new type power cone penetrometer |
| CN110295582A (en) * | 2019-07-29 | 2019-10-01 | 广东省地质装备中心 | A kind of dynamic sounding hammer and dynamic penetrometer |
| CN112229742A (en) * | 2020-09-30 | 2021-01-15 | 广东省高速公路有限公司 | Standard penetration test simulation equipment in centrifugal model test |
| CN113533098A (en) * | 2021-06-22 | 2021-10-22 | 中国化学工程第三建设有限公司 | Automatic portable soil penetration test device |
| CN113969572A (en) * | 2020-07-24 | 2022-01-25 | 中航天建设工程集团有限公司 | Detection device is visited to foundation construction borer |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107152018A (en) * | 2017-07-05 | 2017-09-12 | 中冶集团武汉勘察研究院有限公司 | A kind of safe standard penetration test (SPT) device and method of testing |
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| CN110042823A (en) * | 2019-05-28 | 2019-07-23 | 南京南大岩土工程技术有限公司 | A kind of multifunction dynamic feeler inspection automatic production record and test method based on Internet of Things |
| CN110042823B (en) * | 2019-05-28 | 2024-03-12 | 南京南大岩土工程技术有限公司 | Multifunctional dynamic sounding automatic recording system and test method based on Internet of things |
| CN110284485A (en) * | 2019-07-27 | 2019-09-27 | 山东路达试验仪器有限公司 | A kind of new type power cone penetrometer |
| CN110295582A (en) * | 2019-07-29 | 2019-10-01 | 广东省地质装备中心 | A kind of dynamic sounding hammer and dynamic penetrometer |
| CN110295582B (en) * | 2019-07-29 | 2024-01-26 | 广东省地质装备中心 | Hammering device for dynamic sounding and dynamic sounding instrument |
| CN113969572A (en) * | 2020-07-24 | 2022-01-25 | 中航天建设工程集团有限公司 | Detection device is visited to foundation construction borer |
| CN113969572B (en) * | 2020-07-24 | 2023-03-31 | 中航天建设工程集团有限公司 | Detection device is visited to foundation construction borer |
| CN112229742B (en) * | 2020-09-30 | 2023-06-20 | 广东省高速公路有限公司 | Standard penetration test simulation equipment in centrifugal model test |
| CN112229742A (en) * | 2020-09-30 | 2021-01-15 | 广东省高速公路有限公司 | Standard penetration test simulation equipment in centrifugal model test |
| CN113533098B (en) * | 2021-06-22 | 2023-08-04 | 中国化学工程第三建设有限公司 | Automatic portable soil touch test device |
| CN113533098A (en) * | 2021-06-22 | 2021-10-22 | 中国化学工程第三建设有限公司 | Automatic portable soil penetration test device |
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| CN105839608B (en) | 2017-10-27 |
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