CN218322892U

CN218322892U - Model test box for researching bridge pile deformation caused by shield crossing construction

Info

Publication number: CN218322892U
Application number: CN202222660812.1U
Authority: CN
Inventors: 王京涛
Original assignee: Anhui Agricultural University AHAU
Current assignee: Anhui Agricultural University AHAU
Priority date: 2022-10-10
Filing date: 2022-10-10
Publication date: 2023-01-17
Anticipated expiration: 2032-10-10

Abstract

The utility model provides a research shield constructs to pass through construction and arouses model test case that bridge stake warp, including upper end open-ended box, the miscellaneous soil is equipped with in the box, the through-hole is all seted up to the side of box, be convenient for shield structure equipment to walk, the top of box sets up the overpass bridge floor, the below of overpass bridge floor stands in the top of miscellaneous soil through the pier, fixed connection between overpass bridge floor and the pier, the equal fixed connection bridge stake of lower extreme of pier, the stake all stretches into the inside of miscellaneous soil, the top of overpass bridge floor sets up mechanical displacement sensor and laser displacement sensor, the equal electric connection control computer of mechanical displacement sensor and laser displacement sensor, mechanical displacement sensor can detect the displacement volume of pier, laser displacement sensor can detect the displacement volume on overpass bridge floor and miscellaneous soil surface, can follow directly perceived the shield and pass through the relevant parameter change condition of bridge stake that the bridge crowd arouses through this device model test.

Description

Model test box for researching bridge pile deformation caused by shield penetration construction

Technical Field

The utility model relates to a model test device field, concretely relates to research shield constructs and passes through construction and arouses model test case that the bridge pier warp.

Background

When shield construction meets complex geological conditions, such as crossing dense pedestrian flow places in downtown areas like existing overpasses, viaduct pile foundation groups and the like, if the control is improper, serious safety accidents can be caused, and serious losses are caused to people safety and property.

The utility model discloses a utility model with publication number CN213398529U discloses a shield tunnel model test box, including top open-ended box, a round hole is seted up in the front of box, be equipped with a horizontal first sleeve pipe in the box, the rear end of first sleeve pipe passes through bearing and box's back inner wall swing joint, the round hole is passed through to the front end of first sleeve pipe, a horizontal second sleeve pipe is equipped with above the first sleeve pipe, second sleeve pipe and first sleeve pipe are mutually perpendicular, the second sleeve pipe comprises a plurality of tube sheet rings, eight first through-holes are all seted up to one side of each tube sheet ring; the device can simulate shield operation and detect the influence on the existing tunnel, but the device test is difficult to provide test data help for the construction of the shield equipment passing through the bridge pile foundation group, and model test design and research are lacked in the aspects of researching the key technical implementation condition of the shield passing through the bridge pile foundation group under the complex geological condition and effective stratum deformation control technical measures.

SUMMERY OF THE UTILITY MODEL

For solving the not enough of prior art existence, the utility model provides a research shield constructs and passes through the model test case that the construction arouses the bridge pier to warp.

The technical scheme of the utility model is that: the utility model provides a research shield constructs to pass through construction and arouses model test case that bridge stake warp, including upper end open-ended box, the miscellaneous soil is equipped with in the box, the through-hole is all seted up to the side of box, the shield structure equipment of being convenient for walks, the top of box sets up the overpass bridge floor, the below of overpass bridge floor is through the pier and stand in the top of miscellaneous soil, fixed connection between overpass bridge floor and the pier, the equal fixed connection bridge stake of lower extreme of pier, the bridge stake all stretches into the inside of miscellaneous soil, the top of overpass bridge floor sets up mechanical displacement sensor and laser displacement sensor, the equal electric connection control computer of mechanical displacement sensor and laser displacement sensor, mechanical displacement sensor can detect the displacement volume of pier, laser displacement sensor can detect the displacement volume on overpass bridge floor and miscellaneous soil surface.

Furthermore, the positions, corresponding to the piers, above the overpass bridge floor are provided with mechanical displacement sensors, a plurality of laser displacement sensors which are uniformly distributed in a matrix are arranged above the mechanical displacement sensors, the mechanical displacement sensors and the laser displacement sensors are installed above the box body through supports, detection rods of the mechanical displacement sensors penetrate through the overpass bridge floor to be connected with the top surfaces of the corresponding piers, and laser emitted by the laser displacement sensors irradiates the surface of the miscellaneous soil or the overpass bridge floor.

Further, the support include the bracing piece, wherein equal fixed mounting bracing piece on two relative sides of box, two relative bracing pieces between and be located the equal fixed mounting of top of overpass bridge floor with the horizontal pole, mechanical displacement sensor's upper end fixed mounting respectively on the horizontal pole that corresponds, the top of horizontal pole sets up the backup pad, the upper end fixed connection of backup pad and bracing piece, laser displacement sensor all install in the backup pad.

Furthermore, the miscellaneous soil can fully simulate the soil layer structure in reality.

Furthermore, the side of the box body is provided with two through holes, and the positions of the through holes on the opposite side surfaces correspond to each other.

Furthermore, the bridge piers and the bridge piles are all vertically arranged.

Furthermore, the bridge piles, the piers, the overpass deck and the shield equipment are all manufactured by reducing the actual parts in equal proportion.

The utility model provides a research shield constructs to pass through construction and arouses model test case that the bridge pile warp, and the beneficial effect of this device is: the device can detect the displacement of the piers, the overpass and the ground in the tunnel shield process through the displacement sensor by arranging models such as the miscellaneous soil, the piers, the bridge piles, the overpass and the like in the box body and then arranging the displacement sensor above the box body, thereby being capable of calculating the displacement conditions of the piers, the overpass and the ground in the actual tunnel shield process, playing a reference role in the actual tunnel construction, aiming at the technical difficulties such as complex crossing stratum, large shield tunneling risk and the like, being capable of simply and effectively developing the key technical research of the shield construction under the complex geological condition, designing an indoor model test according to the similarity ratio, intuitively knowing the bridge pile related parameter change condition caused by the shield penetrating through the bridge pile group foundation in a short distance through the model test, simulating the reduction of the safety risk potential in the construction process to the maximum extent through the technical measures, providing reference for the similar engineering model test of the shield construction penetrating through the overpass pile group, and further being capable of designing the model test of the similar shield penetrating through the complex stratum according to the actual working conditions, and researching the construction safety control and related technical measures.

Drawings

Fig. 1 is a schematic structural diagram of one embodiment of the present invention;

FIG. 2 is a schematic view of the reinforced bridge pile of the present embodiment;

fig. 3 is a side view of the present embodiment.

Detailed Description

To facilitate understanding of the present invention for those skilled in the art, embodiments of the present invention will be described below with reference to the accompanying drawings.

In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present application, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.

The utility model provides a research shield constructs to pass through construction and arouses model test case that bridge pier warp, as shown in fig. 1 ~ 3 do the utility model discloses an embodiment, including upper end open-ended rectangle box 1, box 1 is inside to be filled with miscellaneous soil 2, miscellaneous soil 2 includes the clay, sand and soil, the soil or the grit of different grade type such as morals and manners argillaceous sandstone, a soil layer structure for in the abundant simulation reality, two through-holes 3 have all been seted up on box 1's the side, and the position of through-hole 3 on the relative side corresponds each other, make shield structure equipment 4 can get into inside the box through the through-hole, as shown in fig. 1, wherein two relative through-holes 3 on right side correspond for the uplink, two relative through-holes 3 on left side correspond for the downlink.

As shown in fig. 1, 2 and 3, an overpass 5 is arranged above the box 1, the lower part of the overpass 5 is erected above the miscellaneous soil 2 through two rows of vertical piers 6, the overpass 5 is fixedly connected with the piers 6, the lower ends of the piers 6 are fixedly connected with vertical bridge piles 7, and the bridge piles 7 all extend into the miscellaneous soil 2, so that the overpass can be stably erected above the box.

As shown in fig. 1, vertical support rods 8 are fixedly installed at positions corresponding to two rows of piers 6 on left and right side surfaces of the box body 1, the same horizontal cross rod 9 is fixedly installed between the support rods 8 on the opposite side surfaces and above the overpass 5, mechanical displacement sensors 10 are arranged at positions corresponding to the piers 6 above the overpass 5, the upper ends of the mechanical displacement sensors 8 are respectively and fixedly installed on the corresponding cross rods 9, detection rods of the mechanical displacement sensors 8 penetrate through the overpass 5 to be connected with the top surfaces of the corresponding piers 6, and the mechanical displacement sensors are electrically connected with a control computer, so that the mechanical displacement sensors can detect vertical or horizontal displacement of the piers (in the prior art, which is not described in detail herein) and transmit the displacement to the control computer.

As shown in fig. 1, a horizontal rectangular supporting plate 11 is disposed above the cross bar 9, the supporting plate 11 is fixedly connected with the upper end of the supporting rod 8, a plurality of laser displacement sensors 12 are disposed on the bottom surface of the supporting plate 11, the laser displacement sensors 12 are uniformly distributed in a matrix, the laser displacement sensors 12 are all electrically connected to a control computer, and the laser emitted by the laser displacement sensors 12 irradiates the surface of the miscellaneous soil 2 or the overpass 5, so that the displacement condition of the miscellaneous soil or the overpass can be detected (the prior art, which is not described in detail herein) and the data can be transmitted to the control computer.

As shown in fig. 2 and 3, the lower end of the bridge pile was reinforced by wrapping it with concrete 13 and used for comparative tests of the amount of displacement with the unreinforced bridge pile.

The bridge piles, the piers, the overpass deck, the shield equipment and the like are manufactured by reducing actual parts in equal proportion, the shapes of the bridge piles, the piers, the overpass deck and the shield equipment are all consistent with real parts, and the actual construction displacement can be calculated conveniently according to test data.

In summary, when the device is used, the shield equipment 4 enters the box body through one through hole corresponding to the ascending line on one side, shield operation of the ascending line of the tunnel in the direction is carried out, then the box body extends out of the other corresponding through hole, then the box body enters the box body through the through hole corresponding to the descending line, shield operation of the descending line of the tunnel in the direction is carried out, then the actions are repeated to shield the ascending line of the other tunnel and the descending line of the tunnel which are perpendicular to the actions, in the whole shield operation process and after the whole shield operation process, the transverse or vertical displacement of the bridge pier is detected through the mechanical displacement sensor, the displacement of the overpass bridge floor and the miscellaneous soil surface is detected through the laser displacement sensor, and after the detection is completed, a user can reinforce or change the distance between the bridge pile and the tunnel to be shielded through mixed soil wrapping at the lower end of the bridge pile, and tests are carried out again, and test data are compared, so that the best shield scheme of the tunnel is found out.

The device can detect the displacement of the piers, the overpass and the ground in the tunnel shield process through the displacement sensor by arranging models such as the miscellaneous soil, the piers, the bridge piles, the overpass and the ground in the box body and then arranging the displacement sensor above the box body, thereby being capable of calculating the displacement conditions of the piers, the overpass and the ground in the tunnel shield process in reality, playing a reference role in actual tunnel construction, aiming at the technical difficulties such as complex crossing stratum, large shield tunneling risk and the like, being capable of simply and effectively developing the key technical research of shield construction under complex geological conditions, designing an indoor model test according to the similarity ratio, intuitively knowing the bridge pile related parameter change condition caused by the shield penetrating through the bridge pile group foundation in a short distance through the model test, simulating the reduction of safety risk hidden danger in the construction process to the maximum extent through the technical measures, being capable of providing reference for the similar engineering model test of penetrating through the overpass pile group in the shield construction, and further being capable of designing the model test of similar shield penetrating through the complex stratum according to the actual working conditions, and researching the safety control and related technical measures.

The above-mentioned embodiments of the present invention do not limit the scope of the present invention. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The utility model provides a research shield constructs to pass through construction and arouses model test case that bridge pile warp, includes upper end open-ended box (1), its characterized in that: miscellaneous soil (2) are equipped with in box (1), through-hole (3) are all seted up to the side of box (1), the shield of being convenient for equipment (4) is walked, the top of box (1) sets up overpass bridge floor (5), the below of overpass bridge floor (5) is stood in the top of miscellaneous soil (2) through pier (6), fixed connection between overpass bridge floor (5) and pier (6), the equal fixed connection bridge pile (7) of lower extreme of pier (6), bridge pile (7) all stretches into the inside of miscellaneous soil (2), the top of overpass bridge floor (5) sets up mechanical displacement sensor (10) and laser displacement sensor (12), mechanical displacement sensor (10) and laser displacement sensor (12) equal electric connection control computer, mechanical displacement sensor (10) can detect the displacement volume of bridge pile (7), laser displacement sensor (12) can detect the displacement volume on overpass and miscellaneous soil (2) surface.

2. The model test box for researching bridge pile deformation caused by shield crossing construction according to claim 1, characterized in that: the top of overpass bridge floor (5) correspond pier (6) department and all set up mechanical displacement sensor (10), mechanical displacement sensor's top sets up several matrix evenly distributed's laser displacement sensor (12), mechanical displacement sensor (10) and laser displacement sensor (12) all pass through the support mounting in the top of box (1), the test bar of mechanical displacement sensor (10) all passes the top surface that overpass bridge floor (5) connect corresponding pier (6), the laser irradiation of laser displacement sensor (12) transmission is on the surface of miscellaneous soil (2) or overpass bridge floor (5).

3. The model test box for researching bridge pile deformation caused by shield crossing construction according to claim 2, characterized in that: the support include bracing piece (8), wherein two relative sides of box (1) on equal fixed mounting bracing piece (8), between two relative bracing pieces (8) and be located the same horizontal pole of the equal fixed mounting in top (9) of overpass bridge floor (5), the upper end of mechanical displacement sensor (10) respectively fixed mounting on horizontal pole (9) that correspond, the top of horizontal pole (9) sets up backup pad (11), the upper end fixed connection of backup pad (11) and bracing piece (8), laser displacement sensor (12) all install in backup pad (11).

4. The model test box for researching bridge pile deformation caused by shield crossing construction according to claim 1, characterized in that: the miscellaneous soil (2) can fully simulate the real soil layer structure.

5. The model test box for researching bridge pile deformation caused by shield crossing construction according to claim 1, characterized in that: the side of the box body (1) is provided with two through holes (3), and the positions of the through holes (3) on the opposite sides correspond to each other.

6. The model test box for researching bridge pile deformation caused by shield traversing construction according to any one of claims 1 to 5, characterized in that: the bridge pier (6) and the bridge pile (7) are both vertically arranged.

7. The model test box for researching bridge pile deformation caused by shield crossing construction according to claim 1, characterized in that: the bridge piles (7), the piers (6), the overpass deck (5) and the shield equipment (4) are all manufactured by reducing actual components in equal proportion.