CN2635739Y

CN2635739Y - Vertical pressure-resisting static loading tester for pile base

Info

Publication number: CN2635739Y
Application number: CN 03272132
Authority: CN
Inventors: 柳建国; 钟冬波; 邹东峰
Original assignee: Individual
Current assignee: China Metallurgy Architecture Research Institute Co Ltd; China Jingye Engineering Corp Ltd
Priority date: 2003-06-12
Filing date: 2003-06-12
Publication date: 2004-08-25
Anticipated expiration: 2013-06-12

Abstract

The utility model discloses a vertical static bearing resistance testing device for pile foundations, which comprises a testing pile, a bearing disc, an anchorage beam, pulling posts and an anchorage pile; wherein the testing pile is provided vertically to the horizontal plane, with a hydraulic jack provided at the center of the top end of the testing pile; the bearing disc is provided right above the hydraulic jack; at least three anchorage piles are distributed evenly along the circle with the testing pile to be the axis and are vertical to the horizontal plane, while the horizontal height of the testing pile is higher than that of the anchorage piles; every two anchorage piles adjacent along the circle are arranged to an anchorage beam; each anchorage pile is connected to the disc via the pulling post. The utility model has the advantages of simple structure, fast and agile assembly and striking lower testing cost, which is particularly applicable to working area with small space and poor working conditions.

Description

Pile foundation vertical compressive static load test device

Technical field

The utility model relates to the dead load test on pile foundation device in a kind of building field, particularly a kind of pile foundation vertical compressive static load test device.

Background technology

In building field, dead load test on pile foundation is the most basic requirement and the method for pile foundation engineering design and construction quality inspection.At present, the experimental rig that adopts in the test mainly contains three kinds of forms: 1) anchoring pile reaction beam device; 2) ballast platform counterforce device; 3) anchoring pile ballast associating counterforce device.Usually adopt anchoring pile reaction beam device for the large-tonnage pile foundation test, referring to China Construction Industry Press's " technical code for building pile foundation " the 130th page of disclosed content in the nineteen ninety-five publication, this pile foundation vertical compressive static load test device adopts the heavy in section girder steel to set up platform or freely-supported device, the jack pair girder load-bearing position of being located on the test pile applies pile driving pressure load, by the primary and secondary steel beam structure pile driving pressure load is delivered to secondary beam by girder, be delivered to anchoring pile by secondary beam again, measure related data by other aid and draw result of the test.

The shortcoming that above-mentioned pile foundation vertical compressive static load test device of the prior art exists is: owing to will bear the counter-force load of hundreds of tons even thousands of tons of at the dead load test on pile foundation middle girder, the moment of flexure that it produced is huge, so very big with the size design of girder often, cause operational difficulties to its transportation and installation, strengthened material cost, very high to the space requirement of test site simultaneously.

The utility model content

The purpose of this utility model is to overcome above-mentioned the deficiencies in the prior art, provide a kind of simple in structure, install and use fast pile foundation vertical compressive static load test device flexibly.

The technical solution adopted in the utility model is: a kind of pile foundation vertical compressive static load test device, include test pile and anchoring pile, and this test pile is perpendicular to the horizontal plane setting, and its center, upper surface is provided with jack, and this device also includes carrier, anchor beam and pull bar; Described carrier be located at described jack directly over, having three described anchoring piles at least is that the axle center is along circumferentially evenly arranging perpendicular to horizontal plane with described test pile, and the level height of described test pile is higher than the level height of described anchoring pile, fixedly connected between the circumferentially adjacent described anchoring pile in per two edges with anchor beam, be connected with described pull bar between every described anchoring pile and the described carrier.

After adopting the technical solution of the utility model, fixedly connected between the anchoring pile with anchor beam, form the horizontal drag system of anchoring pile, its horizontal component makes anchoring pile only bear the effect of vertical force, like this by the system balance that forms between the anchor beam, simplified pile foundation vertical compressive static load test device greatly and made its more reasonable stress, simultaneously, every anchoring pile all participates in stressed work in process of the test, has improved the safety and the globality of test.In addition,, need not participate in installing by large tonnage crane, make easy to installly, quick, reduced job costs owing to replaced huge heavy girder.

Description of drawings

Fig. 1 is the structural representation of first kind of embodiment of the utility model pile foundation vertical compressive static load test device;

Fig. 2 is the sectional view along A-A line among Fig. 1;

Fig. 3 is the structural representation of second kind of embodiment of the utility model pile foundation vertical compressive static load test device.

The specific embodiment

First kind of embodiment of the utility model pile foundation vertical compressive static load test device, referring to Fig. 1, Fig. 2, include test pile 1, the center, upper end of test pile 1 is provided with jack 6, be provided with carrier 4 directly over the jack 6, with test pile 1 is that four anchoring piles 2 are arranged along circumferentially even in the axle center, and the level height of test pile 1 is higher than the level height of described anchoring pile 2.Along fixedly connected with anchor beam 3 between circumferentially adjacent per two anchoring piles 2, anchor beam 3 can adopt cast-in-site reinforced concrete beam or prefabricated girder steel, and anchoring pile 2 and anchor beam 3 are become one structure.Between every anchoring pile 2 and carrier 4, be connected, adopt welding manner to be connected respectively between pull bar 5 and anchoring pile 2 and the carrier 4 in the present embodiment with pull bar 5.

Second kind of embodiment of the utility model pile foundation vertical compressive static load test device, referring to Fig. 3, the difference of itself and first kind of embodiment is: with test pile 1 is that the axle center is along circumferentially being evenly distributed with three anchoring piles 2.According to above-mentioned principle, in the utility model the quantity of anchoring pile 2 be no less than three and with test pile 1 be the axle center along circumferentially evenly distribution can satisfy the requirement of this technical characterictic of the present utility model.

In technique scheme,, be formed with certain angle between pull bar 5 and the horizontal plane because the level height of test pile 1 is higher than the level height of described anchoring pile 2.In the test, when 6 pairs of carriers 4 of jack apply vertically upward power, carrier 4 passes to pull bar 5 with power, pull bar 5 passes to described anchoring pile 2 with power, owing to exist above-mentioned angle, this power to be broken down into vertically upward a component and a horizontal component, wherein horizontal component is offset by the integrative-structure that described anchor beam 3 forms, make 2 of described anchoring piles bear vertically upward a power, can reach good test effect.Bigger in order to guarantee the suffered in test power vertically upward of above-mentioned anchoring pile 2, take all factors into consideration space, place and material cost simultaneously, the level height 2.5-3.5 rice that makes the level height of test pile 1 be higher than anchoring pile 2 can reach best implementation result.

In addition,, can make to adopt between pull bar 5 and anchoring pile 2 and the carrier 4 to be threaded in order further to improve the convenient, flexible property that the utility model is installed, before installing with work after the placement that can be separated from each other.

Claims

1, a kind of pile foundation vertical compressive static load test device includes test pile and anchoring pile, and this test pile is perpendicular to the horizontal plane setting, and its center, upper surface is provided with jack, it is characterized in that: this device also includes carrier, anchor beam and pull bar; Described carrier be located at described jack directly over, having three described anchoring piles at least is that the axle center is along circumferentially evenly arranging perpendicular to horizontal plane with described test pile, and the level height of described test pile is higher than the level height of described anchoring pile, fixedly connected between the circumferentially adjacent described anchoring pile in per two edges with anchor beam, be connected with described pull bar between every described anchoring pile and the described carrier.

2, pile foundation vertical compressive static load test device as claimed in claim 1, it is characterized in that: the quantity of described anchoring pile is four.

3, pile foundation vertical compressive static load test device as claimed in claim 1, it is characterized in that: the level height of described test pile is higher than the level height 2.5-3.5 rice of described anchoring pile.

4, as claim 1,2 or 3 described pile foundation vertical compressive static load test devices, it is characterized in that: adopt between described pull bar and described anchoring pile and the described carrier to be threaded.