CN111175475B

CN111175475B - Self-sinking circular foundation pit excavation simulation device

Info

Publication number: CN111175475B
Application number: CN202010106053.7A
Authority: CN
Inventors: 木林隆; 林剑鸿; 黄茂松; 钱建固
Original assignee: Tongji University
Current assignee: Tongji University
Priority date: 2020-02-20
Filing date: 2020-02-20
Publication date: 2021-09-03
Anticipated expiration: 2040-02-20
Also published as: CN111175475A

Abstract

The invention relates to a self-sinking circular foundation pit excavation simulation device which is characterized by comprising a model box filled with a soil body (7), wherein the model box comprises a model box body (6), a steel rod (1), a two-way motor (2), a controller and a plurality of sinking control rings (4), the two-way motor (2) is connected to the controller, the steel rod (1) is welded at the bottom of the model box body (6), the two-way motor (2) is in sliding connection with the steel rod (1), a soil cutting blade (3) is arranged on the two-way motor (2), a fixing hole (5) is formed in each sinking control ring (4), and the soil cutting blade (3) is placed in the fixing hole (5). Compared with the prior art, the invention has the advantages of high stability of fixed motion track, reduced error influence and the like.

Description

Self-sinking circular foundation pit excavation simulation device

Technical Field

The invention relates to the field of underground buildings, in particular to a self-sinking circular foundation pit excavation simulation device.

Background

With the accelerated development of the urbanization process in China, the contradiction between the continuously increasing demand of urban space and limited land resources is increasingly prominent, the development and utilization of urban underground space become one of the key points of the current urban basic construction, and more deep foundation pit projects are appearing in the urban construction process. Therefore, two problems in deep foundation pit construction are highly valued by the geotechnical engineering community: firstly, the movement of the surrounding stratum caused by the construction of a deep foundation pit is economically and effectively controlled while the safe construction of the foundation pit is ensured, and the safety of the adjacent building is protected; and secondly, the influence of the development and utilization of the adjacent underground space on the existing foundation pit is controlled as much as possible, and the safety of the foundation pit enclosure structure is protected. Therefore, the excavation of the foundation pit is conveniently and effectively simulated, and various disturbance errors are reduced, so that the higher precision is still achieved under the condition of smaller deformation.

Disclosure of Invention

The invention aims to provide a self-sinking circular foundation pit excavation simulation device for overcoming the defect that the construction precision of a deep foundation pit is greatly influenced by errors in the prior art.

The purpose of the invention can be realized by the following technical scheme:

the utility model provides a from circular foundation ditch excavation analogue means that sinks, is including the mold box that is equipped with the soil body, the mold box includes mold box body, steel pole, two-way motor, controller and a plurality of control ring that sinks, two-way motor is connected to the controller, the steel pole welding is in the bottom of mold box body, two-way motor and steel pole sliding connection, be equipped with on the two-way motor and cut the native blade, it is equipped with the fixed orifices on the control ring to sink, cut native blade place in the fixed orifices.

And the sinking control rings are stacked from top to bottom in an overlapping manner.

Preferably, the length of the soil cutting blade is greater than the diameter of the sinking control ring.

The height of the soil cutting blade is equal to the height of the fixing hole.

The structure of the bidirectional motor is an annular structure.

The steel rod is nested in the bidirectional motor.

The structure of the model box body is a cylindrical structure.

Preferably, the fixing holes of the plurality of sinking control rings are staggered.

Compared with the prior art, the invention has the following beneficial effects:

1. according to the invention, the plurality of sinking control rings are combined and stacked, the bidirectional motor drives the soil cutting blade to rotate to cut the soil layer, and meanwhile, the design of the fixing hole enables the soil cutting blade to automatically fall down when reaching the fixing hole of the sinking control ring below, so that the soil cutting blade automatically moves down to dig the deep foundation pit.

2. The height of the soil cutting blade is equal to that of the fixed hole, so that the soil cutting blade is not hindered by other sinking control rings when the current sinking control ring rotates.

3. The length of the soil cutting blade is larger than the diameter of the sinking control ring, so that the sinking control ring can be randomly placed in the range of the steel rod, and the influence of the deviation of the placing position on the digging progress is avoided.

4. According to the invention, the fixing holes of the plurality of sinking control rings are staggered, and two adjacent fixing holes are not positioned on the same straight line, so that the soil cutting blade is prevented from directly moving downwards and missing the adjacent sinking control rings.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a front view of the present invention;

FIG. 3 is a top view of the present invention;

fig. 4 is a side view of the present invention.

Reference numerals:

1-a steel rod; 2-a bidirectional motor; 3-a soil cutting blade; 4-a sinking control loop; 5-fixing holes; 6-model box body; 7-soil body.

Detailed Description

The invention is described in detail below with reference to the figures and specific embodiments. The present embodiment is implemented on the premise of the technical solution of the present invention, and a detailed implementation manner and a specific operation process are given, but the scope of the present invention is not limited to the following embodiments.

As shown in fig. 1, a from circular foundation ditch excavation analogue means that sinks, including the model case that is equipped with the soil body 7, the model case includes model case body 6, steel pole 1, two-way motor 2, controller and a plurality of control ring 4 that sinks, two-way motor 2 is connected to the controller, steel pole 1 welds the bottom at model case body 6, two-way motor 2 and steel pole 1 sliding connection, be equipped with on two-way motor 2 and cut native blade 3, be equipped with fixed orifices 5 on the control ring 4 that sinks, it places in fixed orifices 5 to cut native blade 3.

The steel rod 1, the model box body 6 and the soil cutting blade 3 are made of steel structures.

As shown in fig. 3, the sinking control rings 4 are stacked one on top of the other.

As shown in fig. 2, the length of the soil cutting blades 3 is greater than the diameter of the subsidence control ring 4.

The height of the earth-scraping blades 3 is equal to the height of the fixing holes 5.

The structure of the bidirectional motor 2 is a ring structure.

As shown in fig. 4, the steel rod 1 is nested in the bidirectional motor 2.

The structure of the model box body 6 is a cylindrical structure.

The fixing holes 5 of the plurality of sinking control rings 4 are staggered.

Example one

Soil 7 needing to be simulated is placed in the model box body 6, the sinking control rings 4 are pressed to the bottom of the model box body in a mode that the steel rods 1 are positioned in the rings, the subsequent sinking control rings 4 are sequentially placed according to the track of the first sinking control ring 4, and the fixing holes 5 of the adjacent sinking control rings 4 need to be arranged in a staggered mode. The bidirectional motor 2 is nested on the steel rod 1, the soil cutting blade 3 is placed in a fixing hole 5 of the sinking control ring 4 at the top end, and the controller controls the bidirectional motor 2 to drive the soil cutting blade 3 to rotate. When the soil cutting blade approaches the fixed hole 5 of the sinking control ring 4 of the next layer, the soil cutting blade rotates reversely, and when the soil cutting blade rotates reversely and passes through the fixed hole 5 of the sinking control ring 4 of the next layer, the soil cutting blade 3 automatically moves downwards to cut the next soil layer until the sinking control ring 4 at the bottom, and the automatic excavation of the deep foundation pit is completed.

In addition, it should be noted that the specific embodiments described in the present specification may have different names, and the above descriptions in the present specification are only illustrations of the structures of the present invention. Minor or simple variations in the structure, features and principles of the present invention are included within the scope of the present invention. Various modifications or additions may be made to the described embodiments or methods may be similarly employed by those skilled in the art without departing from the scope of the invention as defined in the appending claims.

Claims

1. The self-sinking circular foundation pit excavation simulation device is characterized by comprising a model box filled with a soil body (7), wherein the model box comprises a model box body (6), a steel rod (1), a two-way motor (2), a controller and a plurality of sinking control rings (4), the two-way motor (2) is connected to the controller, the steel rod (1) is welded at the bottom of the model box body (6), the two-way motor (2) is in sliding connection with the steel rod (1), a soil cutting blade (3) is arranged on the two-way motor (2), a fixing hole (5) is formed in each sinking control ring (4), and the soil cutting blade (3) is placed in the fixing hole (5);

the sinking control rings (4) are stacked from top to bottom in an overlapping manner;

the fixing holes (5) of the sinking control rings (4) are arranged in a staggered mode.

2. The self-sinking circular foundation pit excavation simulation device according to claim 1, wherein the length of the earth cutting blade (3) is greater than the diameter of the sinking control ring (4).

3. The simulation apparatus for excavation of a self-sinking circular foundation pit according to claim 1, wherein the height of the earth cutting blade (3) is equal to the height of the fixing hole (5).

4. The self-sinking circular foundation pit excavation simulation device according to claim 1, wherein the structure of the bidirectional motor (2) is an annular structure.

5. The self-sinking circular foundation pit excavation simulation device according to claim 4, wherein the steel rod (1) is nested in the bidirectional motor (2).

6. The self-sinking circular foundation pit excavation simulation device according to claim 1, wherein the structure of the model box body (6) is a cylindrical structure.