WO2019136867A1 - Single-compartment utility tunnel and assembled multi-compartment underground comprehensive utility tunnel - Google Patents

Abstract

A single-compartment utility tunnel (1), being formed in a box-shaped structure by assembling a top plate (102), a bottom plate (101) and two side plates (103); one side plate (103) of the single-compartment utility tunnel (1) is a straight plate, and the remaining three plates are all arched outwardly; or two side plates (103) are straight plates, and the top plate (102) and the bottom plate (101) are arched outwardly. Also disclosed is an assembled multi-compartment underground comprehensive utility tunnel, which is formed by two or more single-compartment utility tunnels (1) arranged in parallel in the horizontal direction, adjacent side plates (103) of adjacent single-compartment utility tunnels (1) are straight plates, and the top plate (102) and the bottom plate (101) of the whole utility tunnel and the outer side plates (103) of the single-compartment utility tunnels (1) at the most outside are all arched outwardly.

Description

Single cabin pipe gallery and multi-cabin underground integrated pipe gallery Technical field

The invention relates to a pipe gallery, in particular to a single cabin pipe gallery, and to a tailored multi-cabin underground integrated pipe gallery.

Background technique

The underground integrated pipe gallery mainly consists of a branch pipe gallery and a trunk pipe gallery. Among them, the branch pipe gallery is generally a single-cabin structure, and the trunk pipe gallery is basically a multi-cabin structure. The existing steel structure single-cabin pipe gallery has a circular, horseshoe shape and a rectangular shape (Fig. 1). Since the pipe gallery is a plastic structure, the thickness of the plate body can be reduced by the joint force of the pipe and the soil when buried. Therefore, the pipe slab body having a rectangular cross-sectional shape is arranged to be outwardly arched, that is, the four sides of the pipe porch are arched outwardly (Fig. 2). For multi-cabin pipe porches, there is a type of space, that is, two or more single-cabin structures are juxtaposed together; there is also a subdivision, that is, inside a relatively wide pipe gallery, with walls The body is divided into a plurality of compartments, which are generally cast in concrete.

If the above-mentioned pipe gallery is made into a multi-cabin type, in general, it can only be made into a type of space. At this time, since the side plates of adjacent pipe corridors are arched, round or horseshoe-shaped, the adjacent side plates are not only added after the connection. The spacing between the compartments, and will occupy a large span of the multi-cabin structure, and in order to utilize the principle of soil and soil, it is also necessary to leave gaps between adjacent side panels for filling gravel, coarse sand, Gravel, etc., which further increases the spacing between the compartments and the total width of the pipe gallery, increasing the cost of foundation excavation, as shown in Figure 3-4. At the same time, it has been found that depending on the actual conditions of the construction site or other restrictions or requirements, the pipe arch with a cross-sectional shape of a square arch is not suitable for all situations.

Summary of the invention

OBJECT OF THE INVENTION: The first object of the present invention is to provide a single-cabin pipe gallery that can be applied to different worksite situations; the second object of the present invention is to provide a fight for reducing the total width of the pipe gallery and reducing the cost of foundation excavation. Cabin multi-cabin underground integrated pipe gallery.

Technical Solution: The single-cabin pipe gallery of the present invention is assembled by a top plate, a bottom plate and side plates on both sides to form a box-shaped structure, one side plate of the pipe gallery is a straight plate, and the other three plates are outwardly arched; or two side plates For straight panels, the top and bottom panels are arched outward.

Wherein, when the side plates of the pipe gallery are straight plates, the straight plates are reinforced concrete structures or a combined structure of corrugated steel plates and reinforced concrete.

A tie rod is arranged between the two arching angles of the top plate of the pipe gallery, and a tie rod is arranged between the two arching angles of the bottom plate, or a tie rod is arranged between the two arched legs of the top plate and the bottom plate.

Further, the top plate, the side plate and the bottom plate are corrugated steel plates, and the corrugation direction is perpendicular to the axial direction of the single-cabin pipe gallery.

Shear nails and/or steel bars can be placed at the bottom of the bottom of the pipe gallery, and concrete can be poured on the shear pins and/or steel bars.

The multi-cabin underground integrated pipe gallery of the present invention is formed by two or more single-cabin pipe porches arranged side by side in the horizontal direction, adjacent side plates of adjacent single-cabin pipe porches are straight plates, and the multi-cabin of the cabin type The roof and floor of the underground integrated pipe gallery and the outer side panels of the outermost single-cabin pipe gallery are arched outward.

Wherein, adjacent side panels of adjacent single-cabin pipe porches are placed close to each other; or gaps are left between adjacent side panels of single-cabin pipe porches, and the gap is filled with flexible medium, or concrete, or filled with flexible medium and concrete at the same time, The adjacent side plates and the concrete in the middle form a combined structure, which may be referred to as a vertical wall at this time.

In the above case, at least one of a shear pin, a steel bar and a bolt may be disposed outside the adjacent side plate of the single-cabin pipe gallery. Further, the adjacent side plates of the single-cabin pipe gallery are filled with a flexible medium or concrete or simultaneously Fill the flexible medium and concrete.

The flexible medium is a flexible medium such as soil, gravel, coarse sand, sand, gravel or fine stone. The above concrete is a permeable concrete, and preferably, a porous water pipe is provided in the permeable concrete.

Advantageous Effects: Compared with the prior art, the present invention has the following advantages:

(1) The single-cabin pipe gallery of the present invention is suitable for different working conditions, and has space restrictions or other restrictions on the periphery of the pipe gallery, especially on the side of the pipe gallery;

(2) The total span of multi-cabin pipe gallery is reduced, the foundation excavation width is reduced, cost is saved, and land occupation is saved;

(3) The adjacent side panels of each compartment are two vertical plates carrying the top load at the same time. Although the vertical plates cannot be shared by the pipe and soil, the two plates are simultaneously reduced or not increased compared with the arched plates. The load requirement can be satisfied without increasing the thickness of the plate. In this case, the flexible medium such as sand or fine stone can be filled between the two adjacent side plates, so that the horizontal distance between adjacent chambers is shortened and the foundation excavation width is reduced. Save investment and save on the use of underground space;

(4) Between adjacent plates of each compartment, concrete and the like can be filled to form a steel-concrete composite structure with the corrugated steel plates on both sides, which increases the strength of the wall and greatly reduces the thickness of the steel plate;

(5) When the tie rods are arranged between the arch angles of the top and bottom plates of the pipe gallery, the lateral thrust of the pipe gallery is greatly reduced, and the requirements for the high-pressure solidity of the soil on both sides of the pipe gallery are also reduced. The problem of using the common structure of pipe and soil in the soft zone will be solved;

(6) The brackets on the inner side wall of the pipe gallery are easier to set up, and the space utilization rate of the gallery body is improved;

(7) The utilization rate of the internal space of the pipe gallery is improved;

(8) The present invention easily provides a communication door between the compartments.

DRAWINGS

Figure 1 is a single-chamber pipe gallery having a rectangular cross section in the prior art;

2 is a single-cabin pipe gallery having a square arch shape in the prior art;

3 and 4 are schematic structural views of a conventional multi-cabin pipe gallery;

Figure 5 (a), 5 (b) is a schematic structural view of the first single-cabin pipe gallery;

Figure 6 is a schematic structural view of a second single-cabin pipe gallery;

Figure 7 is a schematic structural view of the adjacent vertical wall panel of the present invention when it is placed close to each other;

8 is a schematic structural view of filling a flexible medium in a gap between adjacent vertical wall panels according to the present invention;

Figure 9 is a schematic view showing the structure of filling concrete in the gap between adjacent vertical wall panels according to the present invention;

Figure 10 is a schematic view showing the structure of the two compartments

Figure 11 is a schematic structural view of a combined bottom plate of the present invention;

Figure 12 is a schematic view showing a simulation experiment of the pipe gallery of the present invention.

Detailed ways

The single-cabin pipe gallery 1 of the present invention is assembled from a top plate 102, a bottom plate 101 and two side side plates 103 into a box-shaped pipe gallery structure. The single-cabin pipe gallery 1 has a side plate 103 which is a straight plate or a vertical plate. The straight plate here can be a reinforced concrete structure or a combined structure of corrugated steel plate and reinforced concrete. The other three plates are arched outwards. At this time, a three-arched pipe corridor structure can be formed, as shown in Fig. 5. As shown in (a) and 5 (b), the pipe gallery is suitable for a case where the side space is limited, and the remaining three plates can still use the joint force of the pipe and soil to increase the strength of the plate body and reduce the thickness of the plate body. Save on cost. In another case, the two side plates in the pipe gallery are straight plates, and the top plate and the bottom plate are arched outwards. At this time, a pipe arch structure is formed which is “straight to the arch”, as shown in Fig. 6, the pipe gallery is applicable. In the case where the space on both sides is limited, the top plate and the bottom plate can still use the joint force of the pipe and soil to increase the strength of the plate body, reduce the thickness of the plate body, and save the cost.

In the present invention, whether it is the top plate 102, the bottom plate 101 or the side plate 103, corrugated steel sheets may be used, and their corrugation directions are perpendicular to the axial direction of the pipe gallery.

The top plate 102 and the bottom plate 101 in the single-cabin pipe gallery are connected to the side plates 103 through the flange 108; the two arches of the top plate 102 and the two arches of the bottom plate 101 are respectively provided with a pull rod 109, at this time, the pipe gallery The lateral outward thrust is greatly reduced, and the high-pressure compactness of the soil on both sides of the pipe gallery is reduced, which is suitable for the soft soil zone.

As shown in FIG. 11, the bottom plate 101 of the pipe gallery of the present invention is outwardly arched, and a shearing nail 104, or a reinforcing bar 105, or a shearing nail 104 and a reinforcing bar may be disposed at the bottom of the bottom plate, that is, the bottom surface of the bottom plate which is in contact with the foundation. 105, and concrete 106 is poured on shear pins 104 and/or steel bars 105, thus forming a combined bottom plate. When the bottom of the bottom plate is reinforced concrete or shear nail concrete, etc., the strength of the bottom plate is increased. When the pipe is buried, the bottom plate is subjected to an upward force, and at this time, the bottom plate or the corrugated steel plate is subjected to tension, and the concrete on the bottom surface of the bottom plate is subjected to pressure. Just take advantage of the strength and stress characteristics of both. When the bottom plate is actually constructed, the bottom of the bottom plate is facing upwards, and the shearing nails 104 and/or the reinforcing bars 105 are arranged, and then the concrete 106 is poured and leveled. After the concrete 106 is solidified, the bottom plate 101 is turned over and installed downward on the pipe gallery base. And then installed with the pipe deck side panel 103.

The tailored underground integrated pipe gallery of the present invention is formed by two or more single-cabin pipe porches 1 arranged side by side in the horizontal direction, and the single-cabin pipe gallery located at the outermost side of the pipe gallery is "three arches" type, located at The single-cabin pipe gallery in the middle is of the "straight-to-arch" type. For example, Figure 7-9 is a three-cabin pipe gallery, Figure 10 is a two-cabin pipe gallery, and the side panels 103 of the adjacent single-cabin pipe gallery are straight plates, and the top plate 102 Arching outward, the bottom plate 101 is arched outwardly, and the outer side panels 103 of the outermost single cabin pipe gallery are also arched outward.

In the present invention, the adjacent side wall panels of the single-cabin integrated pipe gallery 1 are changed from the traditional arch shape to the vertical wall plate to facilitate the space utilization in the pipe gallery, thereby improving the space utilization rate; secondly, the side wall panels are Vertical, it is more conducive to the vertical pole of the pipe rack on the inner side of the side wall; in addition, the vertical wall plate reduces the processing process, without bending, saving processing costs, and finally, the vertical plate is easier to set adjacent A connecting door between the cabins.

Since the adjacent side panels 103 of the adjacent single cabin pipe gallery 1 are vertical plates, they are arranged close to each other, and the adjacent side plates 103 need not be filled with the flexible medium 107 or the concrete. The adjacent side panels of the cabin are two vertical plates carrying the top load at the same time. Although the vertical plates cannot be shared by the pipe and soil, the two plates are simultaneously stressed and reduce or increase the thickness of the plate compared with the arched plates. In the case of the load, the load requirements can be met, the spacing between adjacent single-cabin pipes is shortened, the overall span of the pipe gallery is shortened, the width of the pipe gallery foundation is reduced, the cost is reduced, and the land occupation is saved.

The invention may also leave a gap between the adjacent side panels 103 of the single cabin pipe gallery 1 and fill the gap with the flexible medium 107, or fill the concrete, or at the same time fill the flexible medium 107 and concrete, where the flexible medium may be soil , gravel, coarse sand, sand, fine stone or gravel. When the gap between the adjacent compartments is filled with concrete, the adjacent side panels and the concrete form a vertical wall of the combined structure, and the tensile performance of the vertical wall is increased, and the thickness of the side panels such as the corrugated panels can be correspondingly reduced, thereby reducing the cost. At the same time, at least one of the shear pin, the steel bar and the bolt is arranged outside the adjacent side plate 103 of the single-cabin pipe gallery 1 to enhance the strength of the side plate, and concrete can be filled between the adjacent side plates 103, where the concrete is the most It is good to use porous permeable concrete to pre-bury the porous water pipe in the permeable concrete. When a fire occurs, the water flows out from the water pipe and flows through the permeable concrete to cool the pipe wall.

Example simulation experiment report

1, model test parameters

As shown in Figure 12, the model adopts a three-cabin structure with a corrugation parameter of 75*25mm, a plate thickness of 1mm, and a clearance clearance of 0.366m*0.533 (left single-cabin pipe length*height)+0.466*0.533 (middle single cabin) The length of the pipe gallery * height) +0.583*0.533m (the length of the right single-cabin pipe gallery * height), the three single-cabin pipe gallery forms a multi-cabin pipe gallery, and the two sides are supported by the side plate support 110, which is connected with the pipe floor At a 45-degree angle, the upper part of the pipe gallery and the sides have a soil body 111, the steel material of the pipe gallery is Q345, and the concrete is C15. The thickness of the permeable concrete in the cabin is 25mm, and the top is 500mm thick, and the length of the pipe gallery is 1m.

2, the test steps

2.1. Before applying the upper load of the covering soil, measure and record each length data L1-L6 and zero the 11 stress gauges 112;

2.2. Using a press to apply compressive stress on the top surface of the overburden, apply 3 kPa compressive stress to simulate the primary load on the top of the pipe gallery, and measure and record the data and stress data of each length;

2.3. The compressive stress applied to the surface of the covering soil is gradually increased. When the maximum deflection deformation of the top and bottom plates reaches the specification allowable value, the compressive stress value applied to the surface of the covering soil is measured, and the remaining length data and stress data are recorded and measured;

2.4. Continue to apply the compressive stress on the surface of the soil until the frame material reaches the yield stress value, and record the data and stress values of each length.

Table 1 Each length data L1-L6 record table

	L1	L2	L3	L4	L5	L6
step 1	403.5	606.2	466	626.2	620.5	649.6
Step 2	404	605	466	624.5	621	647.5
Step 3	405	604	466	623.5	622	646.5
Step 4	407	600	466	620	624.5	641

Note: The unit of measure in Table 1 is mm.

Table 2 Stress Meter 1-9 Stress Record Table

Note: The dimension unit in the table is MPa, and the stress gauges 1-9 are the stresses laid on the corrugated board.

Table 3 Stress Meter 10-11 Stress Record Table

	Stress meter 10	Stress meter 11	Overburden compressive stress
step 1	0	0	0
Step 2	4.2MPa	4.5MPa	3kPa
Step 3	12.5MPa	13.8MPa	33kPa
Step 4	19.5MPa	20.8MPa	66kPa

Table 4 Test results

Working condition	Roof load (press + 0.5 m overburden)	Maximum deflection of the frame	Maximum stress of the frame	Maximum stress in the space
1	3kPa+10kPa	1.05mm	75.6MPa	4.5MPa
2	33kPa+10kPa	1.55mm	115.4MPa	13.8MPa
3	66kPa+10kPa	4.3mm	348.6MPa	20.8MPa

Note: Working condition 1 is 3 m filling condition, working condition 2 is 13 m filling condition, and working condition 3 is 23 m filling condition.

3, the test summary

From the analysis of the test results, it can be seen that when the top load of the soil is 3 kPa (simulating the actual working condition of 3 m soil cover height), the maximum deflection of the frame, the maximum stress of the frame, and the maximum stress of the space between the tanks meet the requirements of the specification, and the deflection is safe. The coefficient is 1.4, the safety factor of the steel frame is 4.5, and the safety factor of the concrete in the space is 3.3. When the maximum deflection of the frame exceeds the limit (span L/400, the deflection failure value of the beam in the reference steel design specification) is 1.45 mm, the load on the top of the cover is 33 kPa, the maximum stress of the frame does not exceed the limit Q345, and the cabin The maximum stress of the concrete does not exceed C15. When the stress value of the gallery reaches the limit allowable value Q345, the load at the top of the soil is 66 kPa.

This test is a 1:6 scaled model test. According to the test results, it can be seen that when the size of the pipe section is enlarged by 6 times, the top 3 m high cover soil, considering the primary load of the road, the deflection and material stress are both Can meet the requirements of the specification; when the top cover soil reaches 23 meters high, the stress value of the gallery material reaches the limit.

Claims (13)

1. The utility model relates to a single-cabin pipe gallery, which is assembled from a top plate (102), a bottom plate (101) and two side side plates (103) to form a box-shaped structure, characterized in that: one side plate (103) of the pipe gallery is a straight plate, and the rest The three plates are arched outwardly; or the two side plates are straight, and the top plate (102) and the bottom plate (101) are arched outward.
2. The single-cabin pipe gallery according to claim 1, characterized in that a tie rod (109) is respectively arranged between the two arching angles of the top plate (102) and/or the two arching angles of the bottom plate (101).
3. The single-cabin pipe gallery according to claim 1, wherein the top plate (102), the side plates (103) and the bottom plate (101) are corrugated steel sheets having a corrugated grain direction and a single-cabin pipe gallery (1) The axis direction is vertical.
4. The single-cabin pipe gallery according to claim 1, wherein when the side plate (103) is a straight plate, it is a reinforced concrete structure or a combined structure of corrugated steel sheets and reinforced concrete.
5. The single-cabin pipe gallery according to claim 1, characterized in that: the bottom of the bottom plate (101) is provided with shearing nails (104) and/or steel bars (105), and is provided with shearing nails (104) and/or steel bars. (105) Pouring concrete (106).
6. A type of multi-cabin underground integrated pipe gallery based on the single-cabin pipe gallery according to claim 1, which is formed by two or more single-cabin pipe porches (1) arranged side by side in a horizontal direction, characterized in that: Adjacent single-cabin pipe gallery (1) adjacent side panels (103) are straight panels, the top plate (102) and bottom plate (101) of the multi-cabin underground integrated pipe gallery, and the outer side of the outermost single-cabin pipe gallery The plate (103) arches outward.
7. The integrated pipe gallery according to claim 6, characterized in that said single-cabin pipe gallery (1) is adjacent to the adjacent side panels (103).
8. The integrated pipe gallery according to claim 6, characterized in that the single-cabin pipe gallery (1) leaves a gap between adjacent side plates (103) and fills the gap with a flexible medium (107) and/or Concrete.
9. The integrated pipe gallery according to claim 6, wherein at least one of a shear pin, a steel bar and a bolt is disposed outside the adjacent side plate (103) of the single-cabin pipe gallery (1).
10. The integrated pipe gallery according to claim 9, characterized in that the flexible material (107) and/or concrete is filled between adjacent side panels (103) of the single-cabin pipe gallery (1).
11. The integrated pipe gallery according to claim 8 or 10, wherein the flexible medium is soil, gravel, coarse sand, sand, gravel or fine stone.
12. The integrated pipe gallery according to claim 8 or 10, wherein the concrete is a permeable concrete.
13. The integrated pipe gallery according to claim 12, wherein a perforated water pipe is provided in said permeable concrete.

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