CN210439343U

CN210439343U - Honeycomb type underground pipe gallery test model

Info

Publication number: CN210439343U
Application number: CN201920867086.6U
Authority: CN
Inventors: 程雪松; 涂瑜; 李晋; 郑刚
Original assignee: Tianjin University
Current assignee: Tianjin University
Priority date: 2019-06-11
Filing date: 2019-06-11
Publication date: 2020-05-01
Anticipated expiration: 2029-06-11

Abstract

The utility model discloses a honeycomb type underground pipe gallery test model, which consists of a model pipe piece, an aluminum wire, a bolt, an aluminum wire hole and a convex part at a joint; a ring piping lane comprises six the same sections of jurisdiction, and the model section of jurisdiction is equipped with the cross-section in the department of succession and is the bellying of triangle-shaped, is equipped with the aluminium silk hole on the model section of jurisdiction as linkage channel between the section of jurisdiction, passes through aluminium silk and bolt concatenation between the section of jurisdiction. The model pipe piece of the utility model is connected by adopting the convex part, thereby ensuring that the strength and the stability of the test model are improved when the geometric similarity ratio is unchanged; the model duct piece is provided with the convex part, so that the operation feasibility is improved, and the test progress is accelerated; the model segment joint is connected by adopting bolts and is not easy to loosen, so that the connection durability is improved, and the test effect is ensured. The aluminum wire adopts the arch connecting hole, prevents to warp too big and the local condition of destroying of section of jurisdiction appears in aluminum wire hole department.

Description

Honeycomb type underground pipe gallery test model

Technical Field

The utility model belongs to the technical field of the underground works, in particular to honeycomb formula underground pipe gallery experimental model.

Background

The design sections of the existing pipe gallery and tunnel in China are mostly circular and rectangular, and the stress and the space utilization cannot be well balanced. In order to better utilize underground space, optimize construction procedures and improve overall structural performance, regular hexagonal honeycomb type underground engineering systems have been proposed in design houses.

At present, the shield tunnel lining in China basically uses bolts as connecting pieces, and grooves are required to be arranged at the connecting parts of the segments to be connected as hand holes. But when carrying out model design to single cabin hexagon section structure, there are many shortcomings in connecting the section of jurisdiction according to actual assembly method to influence section of jurisdiction experimental effect:

first, set up hand hole and can weaken section of jurisdiction intensity, make experimental data have the deviation.

Secondly, because the model size is far less than actual size, the hand hole size of undersize can increase the degree of difficulty of assembling, can't guarantee section of jurisdiction and connect the compactness. Thirdly, the deformation of the long straight bolt is relatively large, and the local damage of the pipe piece is easy to occur at the aluminum wire hole, so that the test effect is influenced.

SUMMERY OF THE UTILITY MODEL

In order to solve the problem that exists among the prior art, the utility model provides a honeycomb formula underground pipe gallery experimental model solves among the prior art single cabin hexagon section structure and sets up the above-mentioned problem that the recess exists as the hand hole when the section of jurisdiction junction carries out the model design.

The technical scheme of the utility model is that:

a honeycomb type underground pipe gallery test model is composed of a model pipe piece, aluminum wires, bolts, aluminum wire holes and a connection part protruding part; a ring piping lane comprises six the same sections of jurisdiction, and the model section of jurisdiction is equipped with the cross-section in the department of succession and is the bellying of triangle-shaped, is equipped with the aluminium silk hole on the model section of jurisdiction as linkage channel between the section of jurisdiction, passes through aluminium silk and bolt concatenation between the section of jurisdiction.

The middle of the aluminum wire keeps smooth, and both ends are carved with threads and bolt sleeve buttons.

The model segment material is polypropylene.

The connection between the ring pipes is through seam or staggered seam connection.

Compared with the prior art, the beneficial effects of the utility model are embodied in:

(1) the model pipe pieces are connected by adopting the convex parts, so that the strength and the stability of the test model are improved when the geometric similarity ratio is unchanged;

(2) the model duct piece is provided with the convex part, so that the operation feasibility is improved, and the test progress is accelerated;

(3) the model segment joint is connected by adopting bolts and is not easy to loosen, so that the connection durability is improved, and the test effect is ensured.

(4) The aluminum wire adopts the arch connecting hole, prevents to warp too big and the local condition of destroying of section of jurisdiction appears in aluminum wire hole department.

Drawings

Fig. 1 is a front view of a honeycomb type underground pipe gallery test model of the utility model;

fig. 2 is a schematic three-dimensional view of the connection of the honeycomb type underground pipe gallery test model of the utility model;

fig. 3 is a front view of the connection part of the honeycomb type underground pipe gallery test model of the utility model;

FIG. 4 is a schematic view of a honeycomb type underground pipe gallery test model through-seam pipe gallery of the present invention;

figure 5 is the utility model discloses honeycomb formula underground pipe gallery test model fissure of displacement piping lane's schematic diagram.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in detail with reference to the accompanying drawings.

As shown in fig. 1-3, the honeycomb type underground pipe gallery test model of the present invention is composed of a model segment 1, an aluminum wire 2, a bolt 3, an aluminum wire hole 5 and a joint convex part 6; a ring piping lane comprises six the same sections of jurisdiction 1, and model section of jurisdiction 1 is equipped with the cross-section in succession and is triangular bulge 6, is equipped with aluminium silk hole 5 on the model section of jurisdiction and as the interface channel between the section of jurisdiction, splices through aluminium silk 2 and bolt 3 between the section of jurisdiction. The middle of the aluminum wire 2 keeps smooth, and both ends are engraved with threads 4 which are sleeved with bolts 3.

The assembling method of the honeycomb type underground pipe gallery test model comprises the steps of firstly manufacturing 6 model pipe pieces 1 and aluminum wires 2 with corresponding lengths; and (3) passing the aluminum wires through the aluminum wire holes 5 and connecting the aluminum wires with the assembled duct pieces by using bolts 3 in a sleeved and buckled mode.

In designing and making the test model, the procedure is as follows:

firstly, determining the size and material of a test duct piece

Firstly, the geometric similarity ratio CL of the model is determined as 20 according to the relevant subway tunnel specification and the similarity theory. And then determining the elastic modulus of the pipe sheet material according to the actual load mode in the sandy soil, wherein the elastic modulus of the pipe sheet material in an ideal state is about 1.725GPa calculated from the elastic modulus (34.5GPa) of C50 concrete in actual engineering. The polypropylene (with the elastic modulus of 1.69GPa) is selected as the material of the model segment in consideration of the cost and the processability of the material, and the error between the elastic modulus and the ideal state is about 2.03 percent.

Second, making test model

Due to the model complexity, the full-ring segment was first 3D modeled using Rhinoceros software. PPP (polypropylene) was selected as the 3D printing consumable and the stamp model was tested for elastic modulus. And (4) after the result meets the geometric similarity ratio condition, manufacturing a test model by using 3D printing.

Third, test model assembly

1. After the length of the aluminum wire is determined according to the principle that the linear rigidity is unchanged, the aluminum wire with the diameter of 2.5mm is selected according to the aperture size, the middle part is kept smooth, and the cutter is used for threading the two ends. And penetrating an aluminum wire into the aluminum wire hole, putting gaskets at two ends, screwing the gaskets into the bolts, and then screwing the bolts by using tools such as pliers, a screwdriver and the like to connect the bolts in the segment rings.

2. When the pipe pieces are connected, the three modes of through joint, staggered joint and seamless joint are provided, wherein the through joint and the staggered joint are common. The through seam connection mode is that after the single ring is assembled, when the ring is spliced, the assembling seams among the ring segments are not staggered to form longitudinal through seams; and the assembling seams among the ring pipe pieces are staggered, so that the staggered joint connection is realized when the pipe gallery cannot form a through seam in the longitudinal direction. As shown in fig. 4-5.

The embodiment of the utility model provides a honeycomb formula underground pipe gallery test model and assembly method, nevertheless the utility model discloses a do not aim at the pin-connected panel mode of restriction section of jurisdiction model, technical personnel in the field can adopt other pin-connected panel modes or improve above-mentioned pin-connected panel mode to obtain better experimental effect.

Although the present invention has been described with reference to the accompanying drawings, the present invention is not limited to the above embodiments, which are only illustrative and not restrictive, and those skilled in the art can make many modifications without departing from the spirit of the present invention, and all of them fall within the protection scope of the present invention.

Claims

1. A honeycomb type underground pipe gallery test model is characterized by comprising a model pipe piece (1), aluminum wires (2), bolts (3), aluminum wire holes (5) and a joint protruding part (6); a ring piping lane comprises six the same section of jurisdiction (1), and model section of jurisdiction (1) is equipped with bulge (6) that the cross-section is triangle-shaped in the department of succession, is equipped with aluminium silk hole (5) on model section of jurisdiction (1) and splices through aluminium silk (2) and bolt (3) as connecting channel between the section of jurisdiction, between the section of jurisdiction.

2. The honeycomb type underground pipe gallery test model according to claim 1, wherein the aluminum wires (2) are kept smooth in the middle, and the two ends are provided with threads (4) and bolts (3) in a sleeved mode.

3. A honeycomb underground pipe gallery test model according to claim 1, characterized in that the model tube sheet (1) is polypropylene.

4. The honeycomb underground pipe gallery test model of claim 1, wherein the connection between the annular pipes is a through-seam or a staggered seam connection.