CN-224213394-U - Test device for simulating embedded rock and stress deformation of foundation pit support structure

CN224213394UCN 224213394 UCN224213394 UCN 224213394UCN-224213394-U

Abstract

The utility model relates to the field of foundation pit support structure tests, and discloses a test device for simulating embedded rock and stress deformation of a foundation pit support structure, which comprises a flexible test element, an embedded part, a flexible water stop part and a support structure, wherein the support structure and the flexible water stop part are respectively arranged at the upper end and the lower end of the embedded part, the embedded part is provided with a movable part capable of adjusting the height up and down for installing the support structure, the flexible test element is paved on the surface of the support structure, the flexible test element can cooperatively deform with the support structure, the flexible test element is used for collecting deformation data of the support structure, and can simulate support conditions under various geological conditions and foundation pit depths through simple adjusting bolts and the flexible water stop part, so that the test cost is effectively reduced, the test efficiency and the data accuracy are improved, and a reliable embedded rock and stress deformation test scheme is provided for similar foundation pit support model tests.

Inventors

YANG CHUNSHAN
YU ZHIYUAN
LI YADONG
LIN ZHIWEI
OU ZHENFENG
SHAN YI

Assignees

广州市市政工程设计研究总院有限公司

Dates

Publication Date: 20260508
Application Date: 20250520

Claims (9)

1. The utility model provides a test device of simulation foundation ditch building envelope embedded rock and atress deformation, its characterized in that includes flexible test element, builds in portion, flexible stagnant water portion and retaining structure, retaining structure with flexible stagnant water portion sets up respectively build in the upper and lower both ends of portion, build in portion be equipped with can adjust high moving part from top to bottom in order to be used for installing retaining structure, flexible test element lay in retaining structure's surface, flexible test element can with retaining structure is out of shape in coordination, just flexible test element is used for gathering retaining structure's deformation data.
2. The test device for simulating the deformation of the foundation pit support structure by rock embedding and stress according to claim 1, wherein the flexible test element comprises a plurality of low-rigidity linear test units, and the plurality of low-rigidity linear test units are crisscrossed on the surface of the support structure to form a grid shape.
3. The test device for simulating rock-socketed and forced deformation of a foundation pit support structure according to claim 2, wherein the built-in portion comprises angle steel, the angle steel is provided with a horizontal section and a vertical section, the movable piece comprises built-in bolts, the horizontal section is connected with a plurality of built-in bolts arranged along the length direction of the horizontal section, a clamping plate is connected between two adjacent built-in bolts, and the clamping plate is matched with the vertical section of the angle steel to clamp the retaining structure.
4. The test device for simulating the deformation of the foundation pit support structure due to the rock embedding and stress of the foundation pit support structure according to claim 3, wherein the clamping portion comprises a connecting plate and a clamping plate, the connecting plate is connected to the embedded bolt, an adjusting bolt is connected to the connecting plate in a threaded mode, and the tail end of the adjusting bolt is abutted to the clamping plate.
5. The test device for simulating the rock embedding and stress deformation of the foundation pit support structure according to claim 3, wherein the two ends of the angle steel are connected with angle codes, through holes are formed in the two ends of the vertical section of the angle steel, the through holes are in round corner rectangles, the angle codes are provided with mounting holes, and first bolts are connected between the through holes and the mounting holes.
6. The test device for simulating the deformation of the foundation pit support structure by rock embedding and stress according to claim 3, wherein scale marks are arranged on the embedded bolts.
7. The test device for simulating the deformation of the foundation pit support structure by rock embedding and stress according to claim 6, wherein a rubber layer is arranged on the inner side of the clamping plate.
8. The test device for simulating the deformation of the foundation pit support structure by rock embedding and stress according to claim 7, wherein a plurality of holes are formed in the flexible water stopping portion to change the permeability of the flexible water stopping portion.
9. The test device for simulating the deformation of the foundation pit support structure in rock embedding and stress according to claim 5, further comprising a model box, wherein the embedded part is arranged in the model box, the corner connector is provided with a second bolt, the model box is provided with a plurality of connecting holes at different heights, and the second bolt is connected with the connecting holes.

Description

Test device for simulating embedded rock and stress deformation of foundation pit support structure Technical Field The utility model relates to the field of foundation pit support structure tests, in particular to a test device for simulating embedded rock and stress deformation of a foundation pit support structure. Background In the research process of the foundation pit supporting technology, a model test is an important means for exploring the mechanical property of the foundation pit supporting structure and verifying the feasibility of a design scheme. With the continuous development of foundation pit supporting technology, higher requirements are put on the accuracy, flexibility and repeatability of model tests. The existing foundation pit support model test device has the following defects: 1. The adjustment capability is limited and the generality is not enough, namely the embedding depth of most devices is fixed, and the working conditions of different geological conditions (such as osmotic coefficient difference) and the embedding depth of the enclosure structure cannot be simulated on the same test platform. The test personnel need frequently change the whole set of device, leads to test cost to increase by a wide margin, and operation process is loaded down with trivial details, easily produces human error, seriously influences the accuracy of test data. 2. The stability of the support rock-entering and embedding is poor in that the existing device is not stable enough to be connected with a model box, when complicated load working conditions (such as soil side pressure and underground water seepage force) are simulated, the device is easy to loose, displacement and the like, the actual stress state of a foundation pit support structure is difficult to truly reflect, a sand layer is generally adopted in a foundation pit model test, the constraint of a passive area is small, the embedding effect on the support structure is insufficient, and the reliability and the effectiveness of the model test are severely restricted. 3. The stress deformation testing device has single function, the traditional device cannot meet the requirement of diversified tests, the deformation coordination of the conventional deformation monitoring element and the supporting structure is poor, the macroscopic deformation result cannot be directly obtained, the data acquisition and conversion precision is insufficient, the real space deformation form of the supporting structure is difficult to restore, and the accurate monitoring and the automatic data acquisition of the micro deformation of the supporting structure are difficult to realize. Aiming at the problems, a test device for simulating the rock embedding and stress deformation of the foundation pit support structure is developed, the embedded depth can be quickly adjusted, a model box can be stably connected, multiple geological working conditions can be adapted, and the test device has high-sensitivity deformation monitoring capability, so that the test device becomes an urgent requirement for improving the model test quality and pushing the research and development of foundation pit support technology. Disclosure of utility model The utility model aims to provide a test device for simulating the rock embedding and stress deformation of a foundation pit support structure, which solves the problems, and the specific technical scheme is as follows: The utility model provides a simulation foundation ditch building envelope inlays rock and atress deformation's test device, includes flexible test element, builds in portion, flexible stagnant water portion and fender structure, the fender structure with flexible stagnant water portion sets up respectively build in the upper and lower both ends of portion, build in the portion and be equipped with the movable part of height-adjusting in order to be used for installing the fender structure, flexible test element lay in the surface of fender structure, flexible test element can with the cooperation of fender structure is out of shape, just flexible test element is used for gathering the deformation data of fender structure. As one of the improvements of the technical scheme, the flexible test element comprises a plurality of low-rigidity linear test units, and the plurality of low-rigidity linear test units are crisscrossed on the surface of the supporting structure to form a grid shape. As one of the improvement of the technical scheme, the embedded part comprises angle steel, the angle steel is provided with a horizontal section and a vertical section, the movable part comprises embedded bolts, a plurality of embedded bolts arranged along the length direction of the horizontal section are connected to the horizontal section, a clamping plate is connected between every two adjacent embedded bolts, and the clamping plate is matched with the vertical section of the angle steel to clamp the supporting structure. As one of