CN2811974Y

CN2811974Y - Double tangent plane conical soil sampler

Info

Publication number: CN2811974Y
Application number: CN 200520097227
Authority: CN
Inventors: 陈善雄; 余飞
Original assignee: Wuhan Institute of Rock and Soil Mechanics of CAS
Current assignee: Wuhan Institute of Rock and Soil Mechanics of CAS
Priority date: 2005-07-19
Filing date: 2005-07-19
Publication date: 2006-08-30
Anticipated expiration: 2015-07-19

Abstract

The utility model discloses a double tangential plane conical soil sampler, which is composed of a soil sampler, a sampling tube and a lining tube, wherein the soil sampler is connected with the sampling tube by a pin bolt; the lining tube is directly sheathed at the upper end of the soil sampler; the lower end part of the soil sampler forms a double tangential plane conical shape; the outer diameter of the double tangential plane conical shape at the lower end of the soil sampler is slightly larger than the outer diameter of the sampling tube. The utility model has the advantages of simple structure, effectively reduces the contact face between the soil sampler and soil, eliminates the negative pressure of the end part of a sample when the sample is lifted, reduces the difficulty of penetration and lift, and enhances the collecting quality of the soil sample.

Description

The double cut-surface cone soil sample barrel

Technical field

The utility model relates to a kind of double cut-surface cone soil sample barrel, is applicable to the manual collection of undisturbed sample.

Background technology

Sampling is that the ground shop experiment is studied requisite operation.Although sampling is a regular job in geotechnical engineering investigation, some technical matterss of relevant sampling are satisfactorily resolved so far as yet.Every physico-mechanical properties and the accurate physical and mechanical parameter of grasping ground for the research ground, usually need to gather so-called " undisturbed sample " or " undisturbed soil sample ", this class sample is except the representativeness that requires solid phase components, also claimed structure is not subjected to disturbance, and density, water cut do not change.

The most frequently used soil sample barrel of rig sampling has boring penetration type soil sample barrel and rotary type soil sample barrel.The penetration type thin-wall sampler generally only is applicable to the plastic shape soil of weak soil or part.Strengthen wall thickness and can be applicable to harder great soil group, but the increasing thereupon of area ratio, level of disruption increases, and quality requirements is difficult to guarantee.Therefore to hard, closely knit great soil group so that soft rock to obtain senior soil sample and must use the rotary type soil sample barrel instead.When condition is limited, usually need carry out hand sampling.Hand sampling generally can be adopted dual mode, and a kind of is the uncovered soil sample barrel sampling of hammering, and another kind is manually to carve stripping and slicing shape soil sample.Generally should adopt a kind of method in back, the highest because block soil sample is considered to quality usually.But manually carving stripping and slicing shape soil sample destroys bigger to the place, particularly can't implement for the later stage checking property sampling of building earth structure at all, as adopt the method will directly destroy engineering structure, and it is big manually to carve stripping and slicing shape soil sample workload in addition, and sampling depth is subjected to certain limitation.The uncovered manual soil sample barrel of hammering is generally cylindrical sampler, bigger with soil body surface of contact, penetration resistance is bigger, and sampling depth is restricted or needs other means to cooperate in pan soil earth, work difficulty is big, and, when in pan soil earth, pulling out in the sampling, because sampler and surrounding soil are closely connected, the sample bottom lacks air, often easily form negative pressure in the sample bottom, the one, pull out difficulty on increasing, the 2nd, the easy damaged soil sample.

Summary of the invention

The purpose of this utility model is to provide a kind of double cut-surface cone soil sample barrel, this soil sample barrel is simple in structure, solved that the uncovered manual soil sample barrel sampling of existing hammering difficulty is big, the problem of degree of depth finite sum easy damaged soil sample, reduced injection and on pull out difficulty, strengthen sampling depth, and improved the soil sample acquisition quality.

In order to achieve the above object, the utility model adopts following technical measures: the soil sample barrel inwall is a hollow cylinder, and outer wall is the taper shape that external diameter is slightly larger than the soil sample external diameter of pipe, and symmetria bilateralis cuts into the plane.This soil sample barrel cooperates the surface of contact that can effectively reduce with soil with stopple coupon, before in pan soil earth, pulling out on the soil sampling, rotate 90 ° of soil sample barrel and stopple coupons earlier, to form the space between the two tangent planes on the soil sample barrel and the soil sample barrel periphery soil body, air can enter the sample bottom by this space, on sample end negative pressure when pulling out can eliminate thus, on pull out difficulty and be minimized, also can therefore reduce the soil sample disturbance.

The utility model compared with prior art, have the following advantages and effect: this soil sample barrel cooperates the surface of contact that has reduced soil sample barrel and soil effectively with stopple coupon, sample end negative pressure when pulling out on having eliminated, reduced injection and on pull out difficulty, improved the soil sample acquisition quality.

Description of drawings

Fig. 1 is a kind of structural representation of double cut-surface cone soil sample barrel.

Fig. 2 is a kind of planar configuration synoptic diagram of double cut-surface cone soil sample barrel;

Fig. 3 is the A-A cut-open view of Fig. 2;

Fig. 4 is the B-B cut-open view of Fig. 2;

Embodiment

With reference to the accompanying drawings the utility model is described in further detail below:

According to Fig. 1, Fig. 2, Fig. 3, Fig. 4 as can be known, the double cut-surface cone soil sample barrel of this band stopple coupon is made of soil sample barrel 1, stopple coupon 2, bushing pipe 3.Be made into the face of cylinder that external diameter 9 is slightly less than stopple coupon 2 internal diameters on soil sample barrel 1 top, soil sample barrel 1 is connected by the pin on the soil sample barrel 18 with stopple coupon 2.Bushing pipe 3 is installed in the soil sample barrel, and directly is enclosed within on the external diameter 7 of soil sample barrel 1 upper end.Soil sample barrel 1 end portion is a double cut-surface cone, and taper shape is made of soil sample barrel maximum outside diameter 5, soil sample barrel upper end external diameter 6, soil sample barrel bottom external diameter 7, and two tangent planes 4 are symmetrically arranged in soil sample barrel 1 both sides.

Claims

1, a kind of double cut-surface cone soil sample barrel, it is made of soil sample barrel (1), stopple coupon (2), bushing pipe (3), it is characterized in that: soil sample barrel (1) is connected by the pin (8) on the soil sample barrel (1) with stopple coupon (2), bushing pipe (3) is installed in the soil sample barrel (1), and directly is enclosed within on the external diameter (7) of soil sample barrel (1) upper end.

2, a kind of double cut-surface cone soil sample barrel according to claim 1 is characterized in that: soil sample barrel (1) lower end is a double cut-surface cone.

3, a kind of double cut-surface cone soil sample barrel according to claim 1 is characterized in that: conical by being soil sample barrel external diameter (5,6,7) formation, two tangent planes (4) are symmetrical in soil sample barrel (1) both sides.