CN-121976616-A - Geotechnical centrifuge base and connection structure thereof with civil foundation

CN121976616ACN 121976616 ACN121976616 ACN 121976616ACN-121976616-A

Abstract

The invention relates to the field of geotechnical engineering, and discloses a geotechnical centrifuge base and a connection structure thereof with a civil foundation, wherein the geotechnical centrifuge base comprises at least one combined base, and the combined base is composed of a plurality of detachably connected parts and is used for installing a bearing and supporting a main shaft; the bottom of the combined machine base is provided with an axial anchoring assembly connected with a civil engineering foundation, and the side part of the combined machine base is provided with a radial constraint assembly connected with the civil engineering foundation. The radial constraint assembly has the beneficial effects that the shearing and bending composite load borne by the foundation bolts originally and completely is changed into the foundation embedded plate directly transmitted to the civil foundation through the radial connecting piece, so that the foundation bolts only bear axial load, and the directional optimization of the rigidity of the machine base is realized through detachable connection, and the unbalanced force resistance of the whole machine in the limited space height is improved.

Inventors

CHEN LIANGJUN
LI XINYAO
CHEN LEI
ZHAO SHIPENG
ZHANG JIANQUAN

Assignees

中国工程物理研究院总体工程研究所

Dates

Publication Date: 20260505
Application Date: 20260331

Claims (10)

1. The geotechnical centrifuge base and the connection structure thereof with the civil foundation are characterized by comprising at least one combined base, wherein the combined base is composed of a plurality of detachably connected components and is used for installing bearings and supporting a main shaft, an axial anchoring component connected with the civil foundation is arranged at the bottom of the combined base, and a radial constraint component connected with the civil foundation is arranged at the side of the combined base.
2. The geotechnical centrifuge base and the connection structure thereof with the civil foundation according to claim 1, wherein the combined base comprises a bearing seat, a plurality of supporting legs and reinforcing rings, one end of each supporting leg is detachably connected with the outer wall of the bearing seat, the reinforcing rings are positioned on the periphery of the bearing seat, the other end of each supporting leg is detachably connected with the reinforcing rings, and the supporting legs are integrally connected.
3. The geotechnical centrifuge base and the connection structure with the civil foundation according to claim 2, wherein the bearing seat comprises an inner cylinder body, a plurality of rib plates and an outer cylinder body, an accommodating space for installing a bearing is formed inside the inner cylinder body, the outer cylinder body is arranged outside the inner cylinder body, the plurality of rib plates are uniformly distributed and fixedly connected between the inner cylinder body and the outer cylinder body along the circumferential direction, and each rib plate extends along the radial direction to support and connect the inner cylinder body and the outer cylinder body.
4. The geotechnical centrifuge base and the connection structure thereof with the civil foundation according to claim 3, wherein the supporting legs are of a box-shaped structure formed by welding steel plates, a plurality of supporting legs are uniformly distributed along the circumferential direction of the bearing seat, and one end far away from the reinforcing ring is connected to the outer wall of the outer cylinder.
5. The geotechnical centrifuge base and the connection structure thereof with the civil foundation according to claim 2, wherein the reinforcing rings are of a box structure welded by steel plates, the number of the reinforcing rings is the same as that of the supporting legs, and the reinforcing rings are integrally connected with the supporting legs through screws.
6. The geotechnical centrifuge base and the connection structure with the civil foundation according to claim 2, wherein the radial constraint component comprises a radial screw rod, a radial connecting piece and a transition plate, the tail end of the supporting leg is provided with a radial end face, one end of the radial connecting piece is in fit connection with the transition plate and is detachably connected with the radial end face of the supporting leg after sequentially penetrating through the radial connecting piece and the transition plate through screws, the radial screw rod penetrates through the radial connecting piece and extends in the radial direction, the end part of the radial screw rod is abutted to a foundation embedded plate in the civil foundation and is used for adjusting and locking the radial position of the base, and the radial connecting piece is welded and fixed with the foundation embedded plate after the radial position adjustment is completed.
7. The geotechnical centrifuge base and the connection structure thereof with the civil foundation according to claim 6, wherein the transition plate comprises a transition plate body and a wedge portion arranged on the outer side of the transition plate body, the wedge portion is inclined from one side of the transition plate body to the other side, so that the radial connecting piece is tightly attached to the supporting leg through the wedge portion when the geotechnical centrifuge base is installed, and a disassembly gap is formed between the radial connecting piece and the supporting leg after the transition plate is disassembled.
8. The geotechnical centrifuge base and connection structure with a civil foundation according to claim 7, wherein the transition plate further comprises a horizontal portion, the horizontal portion is located at one end far away from the radial connecting piece and horizontally extends along the top of the transition plate body, in the working state, the horizontal portion is attached to the top surface of the supporting leg, and the inner side of the transition plate body is attached to the radial end surface of the supporting leg.
9. The geotechnical centrifuge base and the connection structure thereof with the civil foundation according to claim 2, wherein the axial anchoring assembly comprises an end surface connection plate and an anchor bolt, the end surface connection plate is mounted on the bottom end surface of the support leg by a screw and is connected with the civil foundation by the anchor bolt.
10. The geotechnical centrifuge base and connection structure with civil foundation according to claim 9, wherein the bottom of the end face connecting plate is provided with sizing blocks for adjusting the levelness and elevation of the base.

Description

Geotechnical centrifuge base and connection structure thereof with civil foundation Technical Field The invention relates to the field of geotechnical engineering, in particular to a geotechnical centrifuge base and a connection structure of the geotechnical centrifuge base and a civil foundation. Background The geotechnical centrifuge is an experimental device which utilizes high-speed rotation to form a stable centrifugal acceleration field to simulate a hypergravity environment, and is widely applied to the fields of geotechnical engineering, deep sea engineering, earthquake resistance assessment, high-energy explosion research and the like. The typical structure mainly comprises a rotating arm, a main shaft, a bearing, a machine base and the like, wherein the machine base is used as a key bearing component for connecting a civil engineering foundation and a rotating system, generally adopts a conical welding integral structure, is fixed on the civil engineering foundation in a secondary grouting mode through foundation bolts uniformly distributed on the circumference of the bottom, and is used for transmitting various loads generated in the running process of equipment. The connection between the prior geotechnical centrifuge base and the civil foundation is realized only by virtue of the bottom foundation bolts, and in the running process of equipment, unbalanced force generated on the rotating arm is transmitted to the base through the main shaft and the bearing and finally is completely borne by the foundation bolts, so that the foundation bolts bear the periodically stretching, bending and shearing composite load, and the stress working condition is very harsh. Because the foundation bolts belong to weak links relative to the base body and other large structural members, the strength and the rigidity of the foundation bolts become the bottleneck of the unbalance force resistance of the whole machine, the fatigue failure risk is easy to be caused, and the development of the geotechnical centrifuge in the directions of high rotating speed, large capacity and large unbalance force resistance is restricted. In addition, the structural size of the existing integral welding type base is increased sharply along with the increase of the capacity of the equipment, the difficulty of manufacturing, transporting and field installation is obviously improved, and the engineering application and performance improvement space of the equipment is further limited. Disclosure of Invention In order to solve the technical problems, the invention aims to provide a geotechnical centrifuge base and a connection structure of the geotechnical centrifuge base and a civil foundation, and the radial constraint component changes shearing and bending composite load which is completely born by foundation bolts originally into a foundation embedded plate which is directly transmitted to the civil foundation through a radial connecting piece, so that the foundation bolts only bear axial load, and the foundation rigidity is directionally optimized through detachable connection, and the unbalance force resistance of the whole geotechnical centrifuge is improved in limited space height. The invention is realized by the following technical scheme: the geotechnical centrifuge base and the connection structure thereof with the civil foundation comprise at least one combined base, wherein the combined base is composed of a plurality of detachably connected components and is used for installing bearings and supporting a main shaft, an axial anchoring component connected with the civil foundation is arranged at the bottom of the combined base, and a radial constraint component connected with the civil foundation is arranged at the side of the combined base. The invention has the beneficial effects that the combined type stand formed by a plurality of detachably connected parts is adopted, so that the large stand which is originally limited by an integral welding structure and can not be disassembled and transported can be decomposed into a plurality of units for being transported and assembled on site respectively, thereby thoroughly solving the difficulties in manufacturing, transporting and installing caused by the increase of the capacity of equipment; meanwhile, an axial anchoring assembly is arranged at the bottom of the combined type base, and a radial constraint assembly is arranged at the side part, so that the unbalanced force which is originally only singly borne by the foundation bolts is decomposed into two independent force transmission paths of an axial load and a radial load, wherein the radial constraint assembly changes the shearing and bending composite load which is originally borne by the foundation bolts into a foundation embedded plate which is directly transmitted to a civil foundation through a radial connecting piece, so that the foundation bolts only bear the axial load, the stress state of the foundation bolts is c