CN2263664Y

CN2263664Y - Deep flat loading test device

Info

Publication number: CN2263664Y
Application number: CN 96239035
Authority: CN
Inventors: 王文臣; 吴银柱; 杨国春; 王彪; 杜兆成
Original assignee: 王文臣
Priority date: 1996-11-05
Filing date: 1996-11-05
Publication date: 1997-10-01
Anticipated expiration: 2006-11-05

Abstract

The utility model relates to a deep flat loading test device, belonging to the in-situ testing device class of ground bearing capacity and deformation rate. The deep flat loading test device is composed of a counter-force fixer composed of a ground anchor fixed on the ground and an inverse force beam, an orifice plate positioned on an orifice, two displacement supporters and displacement sensors which are fixed on the orifice plate, a hydraulic ram at the bottom of the orifice, and a bearing plate. The hydraulic ram is fixed on the bearing plate, an inverse force sleeve suit is fixed on the top of the hydraulic ram. A centralizer is arranged at the outside of an inverse force sleeve. The top of the inverse force sleeve suit is fixed to the bottom of the inverse force beam. A displacement transfer mechanism is connected with the bearing plate. The utility model has the advantages of simple structure and high testing precision.

Description

Deep layer planar loading testing arrangement

The utility model belongs to the in-situ testing device class of ground bearing capacity and deflection.

High rise building foundation bottom surface buried depth can reach 7-15 rice; The bearing capacity of foundation bed foundation soil (bearing stratum) and the foundation soil mechanics parameter of deflection are the basic foundations of foundation design, and the design of foundation is directly connected to the cost and the security reliability of whole building.Yet, can not measure the bearing capacity of underground deep layer foundation soil in the past, how to provide data such as bearing capacity indirectly with method of testings such as laboratory test, dynamic sounding and standard injection; Because the diversity of soil property makes the data deviation that provides bigger, consequently causes construction costs to increase sometimes; Sometimes make building produce, even topple over.For direct test underground deep layer substrate bearing stratum bearing capacity device, new through looking into, domestic have only a kind of dark basic static load instrument (patent No. ZL93 2 45749.5), because of it adopts ground loading power transmission pillar, but do not make its certainty of measurement high and the depth measurement degree is limited.

The purpose of this utility model is: provide a kind of to deep foundation soil bearing capacity and the high novel flat-plate load test device of deflection test precision.

Technical measures of the present utility model are: with by the earth anchor that is fixed on ground, aperture, the counter-force fastening devices that reaction beam is formed, be located in the orifice plates on the aperture, be fixed on two displacement supports and displacement transducer on the orifice plates, the testing arrangement that the bearing plate of hydraulic jack and bottom surface, aperture is formed is the basis, hydraulic jack is fixed on the bearing plate, end face at hydraulic jack is fixed with counter-force cover group, there is centralizer counter-force cover outside, the end face of counter-force cover group and the dark bottom surface of counter-force fix, be connected with the displacement transmission mechanism of being made up of displacement bar and assembly on bearing plate, the top of displacement transmission mechanism contacts with displacement transducer.

The displacement transmission mechanism that displacement bar and assembly are formed, be by being fixed on left and right connecting plates on the bearing plate, being fixed on the junction plate upper end and stretching into displacement bar base in the counter-force cover, be connected the displacement bar in base centre, be fixed on displacement bar upper end and stretch out that counter-force cover and the contacted displacement rest of sensor form.

The displacement transmission mechanism that displacement bar and assembly are formed can also be by two displacement bars about being fixed on the bearing plate, are fixed on that displacement bar upper end and the contacted displacement rest of sensor form.

Testing arrangement of the present utility model has measuring accuracy height, good effect relatively simple for structure.

Fig. 1 is a structural representation of the present utility model;

Fig. 2 is the schematic diagram of another kind of structure of the present utility model.

Drawing explanation and embodiment are described below: see Fig. 1,16 is two earth anchors among the figure, the 17th, reaction beam and earth anchor 16 fix as the counter-force fastening devices, be located in an orifice plates 13 in the aperture, on orifice plates 13, be fixed with two displacement poles 14 and displacement transducer 15, the utility model is that hydraulic jack 3 and 4 is fixed on the bearing plate 1 of well head bottom surface, end face at hydraulic jack is fixed with counter-force cover group 11, fixed outside at counter-force cover 11 has centralizer 12 in case tilt, the end face of counter-force cover group 11 and the bottom surface of reaction beam 17 fix, be connected with the displacement transmission mechanism of being made up of displacement plate 9 and assembly on bearing plate 1, the top of displacement transmission mechanism contacts with displacement transducer 15.Above-mentioned displacement transmission mechanism can be by the displacement bar 9 that is fixed on left and right connecting plates 2 on the bearing plate 1, is fixed on junction plate 2 upper ends and stretches into displacement bar base 8 in the counter-force cover 11, is connected base 8 centres, be fixed on displacement bar 9 upper ends and stretch out that counter-force cover 11 and sensor 15 contacted displacement rests form.For the convenience that connects, the base 8 of displacement bar 9 can interfix with junction plate 2 and bearing plate 1 by T-connecting piece 7 and shell-like flange 6, and 3 is cylinder sleeves among the figure, and the 4th, piston rod, both form hydraulic jack.The 10th, the guide hole plate of the displacement bar 9 between the counter-force cover group 11, the 5th, the flange at oil cylinder top, the 18th, the cable of displacement transducer 15, the 22nd, displacement display system, the 19th, high-pressure oil pipe, the 20th, loading system (oil pump).The 21st, the pressure sensing cable.Also can adopt short-cut method, directly read shift value from displacement transducer 15, directly read force value from loading system, during use, the effect of the counter-force fastening devices that earth anchor 16 and reaction beam 17 and counter-force cover group 11 are formed to the hydraulic jack oiling oil cylinder stretched by loading 20 and oil pipe 9, owing to can only stretch oil cylinder 3 and 4 downwards, make bearing plate 1 and drive displacement bar 9 and assembly to bottom offset, make displacement transducer 15 show the numerical value of displacements.The displacement transmission mechanism that displacement bar of the present utility model and assembly are formed, can also adopt the form of structure of Fig. 2, promptly adopt by two displacement bars 9 about being fixed on the bearing plate 1, be fixed on displacement bar 9 upper ends and sensor 15 contacted displacement rests are formed, if adopt this form of structure, cylinder sleeve 3 fixed outside that are preferably in oil cylinder have guide flange 24 and oil cylinder, be added with guide peg 23 between the flange 5 at top, on the whole, deep layer planar loading testing arrangement of the present utility model is relatively simple for structure, the ratio of precision of test is higher, reliable.

Claims

1, a kind of deep layer planar loading testing arrangement, the counter-force fastening devices of forming by the earth anchor that is fixed on ground, aperture, reaction beam, be located in orifice plates on the aperture, be fixed on two displacement supports and displacement transducer on the orifice plates, the bearing plate of hydraulic jack and bottom surface, hole is formed, and it is characterized in that:

A, hydraulic jack are fixed on the bearing plate, are fixed with counter-force cover group at the end face of hydraulic cylinder, and there is centralizer counter-force cover outside; The end face of counter-force cover group and the bottom surface of reaction beam fix;

B, be connected with the displacement transmission mechanism of being made up of displacement bar and assembly on bearing plate, the top of displacement transmission mechanism contacts with displacement transducer.

2, by the described load test device of claim 1, it is characterized in that: the displacement transmission mechanism that displacement bar and assembly are formed, be by being fixed on left and right connecting plates on the bearing plate, being fixed on the junction plate upper end and stretching into displacement base in the counter-force cover, be connected the base centre displacement bar, be fixed on the displacement bar upper end and stretch out that counter-force cover and the contacted displacement rest of sensor form.

3, by the described load test device of claim 1, it is characterized in that: the displacement transmission mechanism that displacement bar and assembly are formed by two displacement bars about being fixed on the bearing plate, is fixed on that displacement bar upper end and the contacted displacement rest of sensor form.