WO2019136868A1 - Combined multi-compartment underground integrated utility tunnel - Google Patents

Abstract

A combined multi-compartment underground integrated utility tunnel, formed by arranging two or more single-compartment utility tunnel (1) having the same or different cross-sectional shapes side by side in the horizontal direction. The single-compartment utility tunnel (1) is a box structure assembled by a top plate (102), a bottom plate (101) and two side plates (103). Adjacent side plates (103) of adjacent single-compartment utility tunnels (1) are straight plates, and the remaining plates in the integrated utility tunnel are straight plates and/or plates arched outwards.

Description

Multi-cabin underground integrated pipe gallery Technical field

The invention relates to a pipe gallery, in particular to a type of 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 have an outward arching shape or an arc shape, that is, the four sides of the pipe porch are outwardly arched or arc-shaped (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 connected due to their side plates. Arching outward or curved, not only increases the spacing between the compartments, but also greatly occupies the total span of the multi-cabin structure, and also requires the need to use the principle of pipe and soil between adjacent side panels. There are gaps to fill the 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.

The study found that existing cross-sectional shape of the pipe gallery is not suitable for all situations, subject to the actual conditions of the site or other restrictions or requirements.

Summary of the invention

OBJECT OF THE INVENTION: The present invention is directed to providing a multi-cabin underground integrated pipe gallery that can be adapted to different site conditions.

Technical Solution: The multi-cabin underground integrated pipe gallery of the present invention is formed by two or more single-cabin pipe porches having the same or different cross-sectional shapes arranged side by side in a horizontal direction, and the single-cabin pipe porch is composed of a top plate and a bottom plate. The box structure is assembled with the side panels on both sides, the adjacent side panels of the adjacent single cabin pipe gallery are straight plates, and the remaining plates in the integrated pipe gallery are straight plates and/or outwardly arched plates.

At least one of the panels of the single cabin pipe gallery of the present invention is a straight plate.

Among them, three boards in a single cabin pipe arch are outwardly arched, one plate is a straight plate; or two plates are arched outward, and the other two plates are straight plates; or one plate is arched outward, and the other three plates are It is a straight board.

In the above case, when two panels are arched outward, the two panels are located adjacent or in opposite positions. For example, the top panel and its adjacent side panels are arched outwardly, the other side panels and the bottom panel are straight panels; or the top panel and its adjacent side panels are straight panels, and the other side panels and bottom panels are arched outwardly.

When a panel is arched outwardly, the arched panel is a top panel, a bottom panel or a side panel.

Adjacent side panels of the single cabin pipe gallery of the present invention are placed in close proximity. In another case, a gap is left between adjacent side panels of the single-cabin pipe gallery and the gap is filled with flexible medium and/or concrete. In the third case, at least one of shearing nails, steel bars and bolts is disposed outside the adjacent side panels of the single-cabin pipe gallery; at this time, the adjacent side plates may be filled with a flexible medium and/or concrete.

The above flexible medium is soil, gravel, coarse sand, sand, gravel or fine stone. The above concrete is permeable concrete; at this time, a porous water pipe may be provided in the permeable concrete.

The adjacent side panels of the single-cabin pipe gallery may be straight plates, which are reinforced concrete structures or a combined structure of corrugated steel plates and reinforced concrete.

The bottom plate of the pipe gallery may be a straight plate; the straight plate may be a straight corrugated steel plate or a straight concrete slab. At the same time, shear pins or steel bars are placed at the bottom of the bottom plate or shear pins and steel bars are placed at the same time, and concrete is poured on the shear pins and/or steel bars. In addition, the integrated pipe gallery of the present invention can also share a bottom plate.

The top plate, the side plate and the bottom plate of the pipe gallery of the present invention are corrugated steel plates, and the corrugated road direction of the corrugated steel plate is perpendicular to the axial direction of the single-cabin pipe gallery.

When the top and bottom plates of the pipe gallery are arched outward, a tie rod is arranged between the two arch angles, for example, a tie rod is arranged between the two arches of the top plate, or a tie rod is arranged between the two arches of the bottom plate, or between the two arches of the top plate and the bottom plate. Set the lever.

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

(1) The multi-cabin pipe gallery of the present invention can be freely combined by a single-cabin pipe gallery having the same or different cross-sections, and is suitable for various working conditions, for example, the top of the pipe gallery includes a top plate, a bottom plate, a one-sided side or Space restrictions or other restrictions on the side panels on both sides;

(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) The bottom plate of the pipe gallery can be a straight plate or an arch plate. When it is a straight plate, the degree of fit with the foundation is enhanced, which is more conducive to the overall force of the pipe gallery, the basic structure is simple, easy to construct and low in cost;

(5) When the plate body in contact with the surrounding soil in the pipe gallery is arched, the principle of common force of pipe and soil can be effectively utilized to reduce the thickness of the plate body and reduce the cost;

(6) The inner bracket of the pipe gallery is easier to set up, and the utilization rate of the interior space of the corridor is improved;

(7) 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;

(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), 5 (c), 5 (d) are schematic structural views of the first single-cabin pipe gallery;

6(a), 6(b), 6(c), and 6(d) are schematic structural views of a second single-cabin pipe gallery;

7(a) and 7(b) are schematic structural views of a third single-cabin pipe gallery;

Figure 8 is a schematic structural view of a fourth single-cabin pipe gallery;

Figure 9 is a schematic structural view of a flat-bottom integrated pipe gallery;

Figure 10 is a schematic structural view of a vaulted integrated pipe gallery;

Figure 11 is a schematic structural view of a combined flat bottom plate;

Figure 12 is a schematic structural view of a combined arch bottom plate;

Figure 13 is a schematic diagram of a simulation experiment of a flat-bottom integrated pipe gallery;

Figure 14 is a schematic diagram of the simulation experiment of the arch-integrated pipe gallery.

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, wherein adjacent side plates 103 of adjacent single-cabin pipe corridors are straight plates. The remaining plates in the integrated pipe gallery are any of straight and outwardly arched panels.

Specifically, there are four cases in the body of a single-cabin pipe gallery:

(1) Three arches are always: three plates are arched outward, and one side plate 103 is a straight plate. As shown in Figures 7(a) and 7(b), the pipe gallery is suitable for a side space limited. In the case, the remaining three plates 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.

(2) Straightening the arch: the opposite top plate 102 and the bottom plate 101 are outwardly arched, and the two side plates 103 are straight plates. As shown in Fig. 8, the pipe gallery is suitable for 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.

(3) adjacent arches are straight: the adjacent two plates are arched outwardly, for example, the top plate 102 and the adjacent side plate 103 are outwardly arched, and the other side plate 103 and the bottom plate 101 are straight plates, as shown in the figure. As shown in 5(a) and 5(b), the pipe gallery is suitable for the case where the bottom space and the side space of the bottom plate are limited. At the same time, the outer arched roof and the other side plate can still be affected by the pipe and the soil. The force acts to increase the strength of the plate body, reduce the thickness of the plate body, and save the cost; or the top plate 102 and its adjacent side plate 103 are straight plates, and the other side plate 103 and the bottom plate 101 are outwardly arched, as shown in Fig. 5(c). As shown in Fig. 5(d), the pipe gallery is suitable for the case where the space at the top of the pipe gallery is limited or the land is shallow, and the side space is limited. Similarly, the outwardly arched floor 101 and the other side plate 103 are provided. It is still possible to 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.

(4) Three straight one arch: Except that one side plate 103 is a straight plate, one of the other three plates is outwardly arched, and the arched plate may be a top plate 102, a bottom plate 101 or another side plate 103. As shown in Figures 6(a), 6(b), 6(c), and 6(d), this applies to situations where the three directions of the pipe gallery are limited by space or have other special requirements.

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 and the side plates 103 are connected by a flange 108; when the top plate and the bottom plate are outwardly arched, a tie rod 109 is respectively disposed between the two arching angles of the top plate 102 and the two arching angles of the bottom plate 101. When the lateral thrust of the pipe gallery side is greatly reduced, the high-pressure compactness of the soil on both sides of the pipe gallery is reduced, and it is suitable for the soft soil zone.

When the pipe floor 101 is a straight plate, the degree of fit with the foundation is enhanced, which is more favorable to the overall force of the pipe gallery, and the basic structure is simple, easy to construct and low in cost. At this time, the bottom plate 101 may be a flat corrugated steel plate, a flat concrete slab, or a combined structure of corrugated steel sheets and concrete. At this time, the multi-cabin underground integrated pipe gallery can share a bottom plate.

Regardless of whether the bottom plate 101 of the pipe gallery is a straight plate or an arch plate, a shearing nail 104, or a reinforcing bar 105, or a shearing nail 104 and a reinforcing bar 105 may be provided at the bottom of the bottom plate, that is, the bottom plate surface in contact with the foundation, and the shearing nail 104 and the reinforcing bar 105 are simultaneously provided. The concrete 106 is poured onto the nails 104 and/or the reinforcing bars 105, thus forming a combined bottom plate. As shown in Figures 11-12, the bottom of the bottom plate is provided with shear pins 104 and reinforcing bars 105 at the same time. 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 multi-cabin underground integrated pipe gallery of the present invention is formed by two or more single-cabin pipe porches having the same or different cross-sectional shapes arranged side by side in the horizontal direction, thereby realizing the same or different single-cabin pipe porches. Free combination, suitable for a variety of different working conditions, such as the space limit or other restrictions on the perimeter of the pipe gallery including the top plate, the bottom plate, the one-sided side or the side panels, etc. The body is made into a straight plate. 9 and 10 are schematic structural views of a flat bottom and a vault integrated pipe gallery, respectively, but the present invention is not limited to these two cases, and the above-mentioned (1)-(4) four single-cabin pipe porches can be freely combined to obtain various kinds. A multi-cabin integrated pipe gallery. Of course, in the present invention, if the plate body in contact with the soil body is outwardly arched, the pipe and the soil can be effectively utilized to reduce the thickness of the plate body itself, thereby reducing the cost.

In the present invention, 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 are not filled with the flexible medium 107 or the concrete, and it is not necessary to use the pipe and soil together. According to the principle of force, the adjacent side plates 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 stressed and reduced or not increased compared with the arched plates. The load requirement can be satisfied without increasing the thickness of the plate. 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 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.

The invention makes it easier to set the bracket on the vertical vertical side panel of the single or multi-cabin pipe gallery, thereby improving the space utilization rate of the interior of the gallery. Furthermore, the use of vertical side plates can reduce the number of processing steps without bending, saving processing costs. In addition, the riser makes it easier to set up a communication door between adjacent compartments.

Example simulation experiment report

1, model test parameters

As shown in Figure 13-14, the model adopts a three-cabin structure with a flat bottom and a vault. The corrugation parameter is 75*25mm, the plate thickness is 1mm, and the clearance of the section is 0.366m*0.533 (left single-cabin pipe length*height)+ 0.466*0.533 (middle single cabin pipe length * height) +0.583*0.533m (right single cabin pipe length * height), three single cabin pipe gallery forms a multi-cabin pipe gallery, side panels support 110 Support, which is at a 45-degree angle with the bottom of the pipe gallery, with soil 111 on the upper and sides of the pipe gallery, Q345 steel pipe and C15 concrete. 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 a pressure of 3 kPa to simulate the first-level 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 Checklist

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 (17)

1. The utility model relates to a multi-cabin underground integrated pipe gallery, which is characterized in that two or more single-cabin pipe porches (1) having the same or different cross-sectional shapes are arranged side by side in a horizontal direction, and the single-cabin pipe The gallery is assembled by the top plate (102), the bottom plate (101) and the side panels (103) to form a box structure. The adjacent side panels (103) of the adjacent single cabin pipe gallery are straight plates, and the remaining plates in the integrated pipe gallery are Straight and/or arched panels.
2. The integrated pipe gallery according to claim 1, wherein three of the single-cabin pipe porches are outwardly arched, one plate is a straight plate; or two plates are outwardly arched, and the other two plates are Straight plate; or one plate arched outward, and the other three plates are straight.
3. The integrated pipe gallery of claim 2 wherein said two panels are located adjacent or opposite when said two panels are arched outwardly.
4. The integrated pipe gallery according to claim 3, wherein the top plate (102) and its adjacent side plates (103) are outwardly arched, and the other side plate (103) and the bottom plate (101) are straight plates; or The top panel and its adjacent side panels are straight panels, and the other side panels and bottom panels are arched outwardly.
5. The integrated pipe gallery according to claim 2, wherein when the one panel is arched outwardly, the arched panel is a top panel (102), a bottom panel (101) or a side panel (103).
6. The integrated pipe gallery according to claim 1, characterized in that the adjacent side panels of the single-cabin pipe gallery (1) are placed in close proximity.
7. The integrated pipe gallery according to claim 1, characterized in that a gap is left between adjacent side plates (103) of the single-cabin pipe gallery (1), and a flexible medium (107) and/or is filled in the gap. Or concrete.
8. The integrated pipe gallery according to claim 1, characterized in that the single-cabin pipe gallery (1) is provided with at least one of a shear pin, a steel bar and a bolt outside the adjacent side plate (103).
9. The integrated pipe gallery according to claim 8, characterized in that the single tank pipe gallery (1) is filled with a flexible medium (107) and/or concrete between adjacent side panels (103).
10. The integrated pipe gallery according to claim 7 or 9, wherein the flexible medium is soil, gravel, coarse sand, sand, gravel or fine stone.
11. The integrated pipe gallery according to claim 7 or 9, wherein the concrete is a permeable concrete.
12. The integrated pipe gallery according to claim 11, wherein a perforated water pipe is provided in said permeable concrete.
13. The integrated pipe gallery according to claim 1, wherein when the adjacent side panels of the single-cabin pipe gallery are straight plates, the straight plates are reinforced concrete structures or a combined structure of corrugated steel plates and reinforced concrete.
14. The integrated pipe gallery of claim 1 wherein said bottom plate (101) is a straight plate.
15. The integrated pipe gallery according to claim 14, wherein the straight plate is a flat corrugated steel plate or a flat concrete plate.
16. The integrated pipe gallery according to claim 14, wherein said integrated pipe gallery shares a bottom plate (101).
17. The integrated pipe gallery according to claim 1, wherein said top plate (102), side plates (103) and bottom plate (101) are corrugated steel sheets having a corrugated grain direction perpendicular to an axial direction of the single-cabin pipe gallery.

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