CN202175939U

CN202175939U - Soil body compactness detection device

Info

Publication number: CN202175939U
Application number: CN2011202422809U
Authority: CN
Inventors: 常方强
Original assignee: Huaqiao University
Current assignee: Huaqiao University
Priority date: 2011-07-08
Filing date: 2011-07-08
Publication date: 2012-03-28
Anticipated expiration: 2021-07-08

Abstract

The utility model discloses a soil body compactness detection device, which comprises a sleeve and a contact probe rod. The length of the sleeve is the same as the length of the contact probe rod. The contact probe rod is arranged in the sleeve in clearance fit mode, and a conical contact probe head is positioned at the bottom end of the contact probe rod. The diction device further comprises a support, wherein a punched hole is arranged on the support, the bottom of the sleeve is arranged in the punched hole in penetrating mode, and the bottom end of the sleeve is abreast with the lower surface of the support. The sleeve and the support are fixed together in perpendicular mode, the length of the contact probe rod is 1.25m, the diameter of a reinforcing steel bar is 20mm, and scale marks are arranged on the contact probe rod at the 0.7-meter length position form the top to the bottom. The soil body compactness detection device is simple in structure, convenient in operation and low in cost. Soil body disturbance is avoided in detecting, thereby providing a new way of testing soil body compactness.

Description

Soil body compactness checkout gear

Technical field

The utility model is a kind of compactness and test of bearing capacity device, specifically is meant a kind of device that compactnesss such as structure foundation rubble or sand bed course, bed course, embankment filled soil detect that is used for.

Background technology

In the construction of fill constructions such as structure foundation rubble or sand bed course, bed course and embankment filled soil; The compactness of the soil body is one of important parameter of control construction quality; When soil body compactness acquires a certain degree; Bearing capacity of foundation soil just can meet the demands, and deflection just can be controlled in certain scope.The common method that detects for the ground compactness at present comprises core cutter method, California Bearing Ratio method (CBR) and Pu Shi penetrometer method (PPT); For core cutter method and CBR method; Need the soil body be taken out from original position; Put into cutting ring or CBR test box and measure, the process that fetches earth produces disturbance to the soil body unavoidably, makes the result that deviation arranged; The PPT method need could realize by the Pu Shi penetrometer, this method for compactness bigger banket the time, injection sometimes is difficult, when meeting coarse-grained soil this method with inapplicable, complex equipments, cost is higher.Therefore it is very necessary not have soil disturbance, structure letter and soil body compactness checkout gear easy and simple to handle when developing a kind of the detection.

The utility model content

There are not soil disturbance, low cost of manufacture and soil body compactness checkout gear easy and simple to handle when in view of this, the purpose of the utility model is a kind of the detection is provided.

In order to reach above-mentioned purpose, the solution of the utility model is:

A kind of soil body compactness checkout gear comprises the sleeve pipe and the sounding rod of equal in length, and this sounding rod is located in this sleeve pipe with the mode of matched in clearance; The bottom of this sounding rod has the contact probe of taper; Wherein: checkout gear also comprises bearing, has perforation on this bearing, and the bottom of said sleeve pipe is located in this perforation and the soffit flush of the bottom of said sleeve pipe and this bearing; Said sleeve pipe and this bearing are fixed together with orthogonal mode; Said sounding rod is that length is 1.25m, and diameter is the reinforcing bar of 20mm, and 0.7m length place from top to bottom indicates scale mark at said sounding rod.

The cone angle of said contact probe is 60 degree.

Said sleeve pipe is a lucite tube, and length is 1.25m, and internal diameter is 25mm, and wall thickness is 3mm.

After adopting said structure, the utility model soil body compactness checkout gear has following beneficial effect:

When one, detecting, bearing lies in a horizontal plane on the soil body surface that will test, and sleeve pipe is perpendicular to soil body surface; Sounding rod is vertically put in the sleeve pipe, during concrete operations, sounding rod is mentioned; And be promoted to the mark of 0.7m, make that 0.7m scale place is concordant with cannula tip, this moment sounding rod the bottom far from ground 0.7m; Keep vertically making its freely falling body then, in the soil body that following backward injection is tested; Measure the depth of penetration of sounding rod, be scaled soil body compactness according to the depth of penetration of the variety classes soil body and the rule-of-thumb relation of compactness; Therefore the utility model has been avoided the sampling disturbance and the expensive problem of PPT method of traditional core cutter method, CBR method, has simple in structure, cost, effect easy and simple to handle, for the test of soil body compactness provides a kind of new approach;

Two, casing length is 1.25m, during detection, after sounding rod is promoted to the mark freely falling body of 0.7m, only needs to measure the distance between the top of top and sleeve pipe of sounding rod, can record the depth of penetration of sounding rod, and its operation is more simple and easy to do.

Description of drawings

Fig. 1 is the structural representation of the utility model soil body compactness checkout gear;

Fig. 2 is the working state schematic representation of the utility model soil body compactness checkout gear.

Among the figure:

Sounding rod 1 contact probe 11

Sleeve pipe 2 bearings 3

The specific embodiment

In order further to explain the technical scheme of the utility model, come the utility model is set forth in detail through specific embodiment below.

Shown in Fig. 1-2, the utility model soil body compactness testing arrangement comprises sounding rod 1, sleeve pipe 2 and bearing 3.

It is 1.25m that sounding rod 1 adopts length, and diameter is the reinforcing bar of 20mm, and the bottom of sounding rod 1 has the contact probe 11 of taper, and the cone angle of contact probe 11 is 60 degree; Sleeve pipe 2 is a lucite tube, and length is identical with reinforcing bar, also is 1.25m, and internal diameter is 25mm, and wall thickness is 3mm, and 0.7m length place from top to bottom indicates scale mark at sounding rod 1, and sleeve pipe 2 plays the sounding rod 1 vertical all the time effect in dropping process that keeps; Bearing 3 is circular steel plate, and its circle centre position is provided with perforation, the bottom of sleeve pipe 2 be located in this perforation and with bearing 3 mutual vertical fixing together, and the soffit flush of the bottom of sleeve pipe 2 and bearing 3.

During detection, bearing 3 is lain in a horizontal plane on the soil body surface that will test, sleeve pipe 2 is perpendicular to soil body surface; Sounding rod 1 is vertically put in the sleeve pipe 2, and be promoted to the above-mentioned mark of 0.7m, keep vertically; Letting go then makes its freely falling body, in the soil body that following backward injection is tested, and the distance between the top of measurement sounding rod 1 and the top of sleeve pipe 2; Be the depth of penetration of sounding rod 1, be scaled soil body compactness according to the depth of penetration of the variety classes soil body and the rule-of-thumb relation of compactness.

Wherein, standard depth of penetration and the compactness in silt, middle cobble sand and the gravelly soil is respectively:

Silt: λ=-5.2z+162;

Middle cobble sand: λ=-8.9z+156;

Gravelly soil: λ=-8.8z+125;

In the formula: λ is soil body compactness (%), and z is depth of penetration (cm).

The utility model makes full use of the degree of depth of sounding rod 1 injection soil body in dropping process, is scaled soil body compactness.Therefore the utility model has been avoided the sampling disturbance and the expensive problem of PPT method of traditional core cutter method, CBR method, has characteristic simple in structure, easy and simple to handle, cost, for the test of soil body compactness provides a kind of new approach.

The product form and the style of the foregoing description and accompanying drawing and non-limiting the utility model, the those of ordinary skill of any affiliated technical field all should be regarded as not breaking away from the patent category of the utility model to its suitable variation or modification of doing.

Claims

1. soil body compactness checkout gear comprises the sleeve pipe and the sounding rod of equal in length, and this sounding rod is located in this sleeve pipe with the mode of matched in clearance; The bottom of this sounding rod has the contact probe of taper; It is characterized in that: checkout gear also comprises bearing, has perforation on this bearing, and the bottom of said sleeve pipe is located in this perforation and the soffit flush of the bottom of said sleeve pipe and this bearing; Said sleeve pipe and this bearing are fixed together with orthogonal mode; Said sounding rod is that length is 1.25m, and diameter is the reinforcing bar of 20mm, and 0.7m length place from top to bottom indicates scale mark at said sounding rod.

2. soil body compactness checkout gear as claimed in claim 1 is characterized in that: the cone angle of said contact probe is 60 degree.

3. soil body compactness checkout gear as claimed in claim 1 is characterized in that: said sleeve pipe is a lucite tube, and length is 1.25m, and internal diameter is 25mm, and wall thickness is 3mm.