Underground pipe gallery construction protection device

Abstract

The invention belongs to the technical field of civil engineering, and particularly relates to an underground pipe gallery construction protection device. The technology comprises a supporting frame, and a formwork assembly is arranged on the outer side of the supporting frame; the construction method of the protection device comprises the following steps: S1, building a working pit; s2, a protection groove used for insertion of the supporting frame is excavated; s3, the supporting frame is mounted in the protection groove, and a mounting groove is dug in the outer side of the protection groove; s4, a concrete protection plate is poured; s5, the soil body in the supporting frame is excavated; s6, the formwork assembly and the supporting frame are disassembled; and S7, the steps from S1 to S6 are repeated according to the excavation direction until the designed length of the underground pipe gallery is reached. According to the construction method, a temporary protection is constructed firstly through the supporting frame, then the concrete protection plate is poured, in the hardening process of the concrete protection plate, the soil body in the supporting frame can be excavated, time is reasonably utilized, and the construction period of a shallow-buried excavation method is shortened.

Description

Technical Field

[0001] The invention belongs to the technical field of civil engineering, and in particular relates to a protective device for underground pipe gallery construction. Background Art

[0002] With the progress of society and technology, people's living standards and quality are constantly improving. Pipelines need to be laid in various facilities, such as electricity, communications (including monitoring lines), radio and television, water supply, drainage, heat, gas, fire-fighting pipelines, traffic signals, emergency optical cables, etc.; in order to effectively avoid the problem of repeated road excavation due to the burial or maintenance of pipelines, underground pipeline corridors are generally set up on the ground in the city, and the pipelines are laid in the underground pipeline corridors. The underground pipeline corridors can greatly facilitate the maintenance and inspection of municipal pipelines, effectively utilize the space under the road, save urban land, and beautify the urban environment. At the same time, underground pipeline corridors are waterproofed to prevent the pipelines from directly contacting the soil and groundwater, thereby avoiding soil corrosion to the pipelines and extending the service life of the pipelines.

[0003] At present, the construction methods of underground utility corridors include shield method, open-cut cast-in-place method, open-cut prefabrication method, and shallow buried underground excavation method. Among them, open-cut cast-in-place method and open-cut prefabrication method are suitable for construction in new cities, while shallow buried underground excavation method and shield method are suitable for construction in existing cities. The shield method is relatively expensive. Among them, shallow buried underground excavation method is more widely used in the construction of underground utility corridors in existing cities because of its flexibility, small impact on roads, underground pipelines, and road environment, small demolition area, and no disturbance to residents.

[0004] The first step of the shallow buried tunnel excavation method is to build a working pit, the second step is advance support, the third is tunnel excavation construction, and the fourth is corridor construction; among them, advance support is to allow slurry (cement or chemical slurry, etc.) to enter the top of the excavated tunnel through a conduit to harden it, and then carry out tunnel excavation construction; this method of hardening by slurry, first, because after the slurry is injected into the top of the excavated tunnel, it takes time to harden, and excavation can only be carried out after hardening, and after excavation, it is necessary to pour concrete for protection, and after the concrete hardens, repeat the advance support, and then carry out tunnel excavation construction. In this way, construction can only be carried out step by step, and in one step, it is necessary to wait for hardening time twice (hardening of the excavated tunnel top in advance support and hardening of the side wall protection concrete in tunnel excavation construction), and the slurry for hardening the excavated tunnel top in advance support is located in the soil, and its hardening time is relatively long. The waiting time for hardening is a major influencing factor for the relatively long construction period of the shallow buried tunnel excavation method. Summary of the invention

[0005] The purpose of the present invention is to provide an underground pipe gallery construction protection device to reduce the construction period of the shallow buried dark excavation method.

[0006] The described construction protection device for an underground pipe gallery includes a support frame. The overall structure of the support frame is in an inverted "U" shape, and a formwork assembly for pouring a concrete protection board is arranged on the outer side of the support frame;

[0007] The construction method of this protection device is as follows:

[0008] S1. According to the design plan, construct a working pit;

[0009] S2. Excavate a protection groove for inserting the support frame in the soil in the excavation direction. The protection groove is in an inverted "U" shape with an open bottom;

[0010] S3. Install the support frame in the protection groove, and excavate an installation groove for installing the formwork assembly on the outer side of the protection groove;

[0011] S4. Install the formwork assembly into the installation groove and pour concrete to form a protection board;

[0012] S5. Excavate the soil inside the support frame;

[0013] S6. Dismantle the formwork assembly and the support frame;

[0014] S7. Then, repeat the steps from S1 to S6 according to the excavation direction until the designed length of the underground pipe gallery is reached.

[0015] Furthermore, the support frame is made of steel plates.

[0016] Furthermore, the formwork assembly includes two vertically arranged first formworks and one horizontally arranged second formwork. On one side of each first formwork, there are two parallel first baffles perpendicular to the length of the first formwork. On the top of the second formwork, there are two parallel second baffles parallel to the length direction of the second formwork;

[0017] The length of the second formwork is less than the length of the second baffle, and the width of the first baffle plus the thickness of the first formwork is equal to the difference between the second formwork and the second baffle;

[0018] An independent first support assembly for supporting the first formwork is arranged between the support frame and the first formwork, and a second support assembly for supporting the second formwork is arranged between the support frame and the second formwork.

[0019] Furthermore, the first support assembly includes several first support blocks. At both ends of each first support block, there are fixed first sliders. On both the first formwork and the support frame, there are first chutes for the first sliders to insert and slide horizontally.

[0020] Furthermore, at the bottom of the side of the first formwork away from the first baffle, a fourth slider is fixed, and the fourth slider can slide in the first chute.

[0021] Furthermore, the second support assembly includes a plurality of second support blocks, both ends of the second support blocks are fixed with second sliders, and the support frame and the second template are provided with second slide grooves for the second sliders to be inserted and slide horizontally.

[0022] Furthermore, a roller is installed at the bottom of one side of the second template.

[0023] Furthermore, one end of the second supporting block and the first supporting block is provided with a through hole along the thickness direction thereof.

[0024] Furthermore, in step S2, the excavation of the protection groove is firstly performed by continuous drilling through a drilling device, and then manually trimmed.

[0025] Furthermore, in step S6, after the formwork assembly and the support frame are removed, temporary supports are added to support the top of the protective plate.

[0026] Compared with the prior art, the present invention has the following beneficial effects:

[0027] The present invention first constructs a temporary protection through a support frame, and then digs an installation groove and casts a concrete protection plate through a template. During the hardening process of the concrete protection plate, the soil in the support frame can be excavated, and most of the soil excavation work is placed in the time waiting for the concrete to harden, which makes reasonable use of time. In addition, in the early stage, since the support frame is pre-set, there is no need to harden the top of the excavated soil, which also saves time, thereby reducing the construction period of the shallow buried dark excavation method. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a structural schematic diagram of the present invention;

[0029] Figure 2 for Figure 1 A schematic diagram of a top view structure;

[0030] Figure 3 for Figure 1 Schematic diagram of the cross-sectional structure of AA;

[0031] Figure 4 for Figure 1 A schematic diagram of the enlarged structure at B in the middle;

[0032] Figure 5 The use of the present invention is shown in FIG. Figure 1 ;

[0033] Figure 6 The use of the present invention is shown in FIG. Figure 2 ;

[0034] Figure 7 The use of the present invention is shown in FIG. Figure 3 ;

[0035] Figure 8 Schematic diagram of the use of the present invention Figure 4 ;

[0036] Fig. 9 Schematic diagram of the use of the present invention Figure 5 ;

[0037] Fig.10 Schematic diagram of the use of the present invention Figure 6 ;

[0038] Fig.11 Schematic diagram of the use of the present invention Figure 7 ;

[0039] Fig.12 Schematic diagram of the use of the present invention Figure 8 ;

[0040] Names of each component in the figure: 1. Support frame; 2. First slider; 3. First support block; 4. Fourth slider; 5. First template; 6. First baffle; 7. Third slider; 8. Second baffle; 9. Second template; 10. Fixed plate; 11. Roller; 12. Second support block; 13. Second slider. Detailed implementation manners

[0041] The present invention will be further described below through specific embodiments with reference to the accompanying drawings, but it is not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

[0042] An underground pipe gallery construction protection device described in this embodiment, as Figure 1 , Figure 2 , Figure 3 and Figure 4 shown, includes a support frame 1. The support frame 1 is integrally in a "C" - shaped structure. The support frame 1 is made of steel plates and is integrally formed. The support frame 1 is a steel plate. One is that it is not easily damaged, increasing its service life. The other is that its strength is relatively large under the same thickness, so that the thickness of the support frame 1 can be reduced, thereby reducing the excavation size of the pre - protection groove; of course, the support frame 1 can also be formed by concrete pouring.

[0043] On the outside of the support frame 1, two vertically arranged first templates 5 and one horizontally arranged second template 9 are independently provided. On one side of each of the first templates 5, two first baffles 6 that are parallel to each other and perpendicular to the length of the first template 5 are provided. On the left side of the left first template 5, two front-back parallel first baffles 6 are provided. On the right side wall of the right first template 5, two front-back parallel first baffles 6 are provided. On the top of the second template 9, two second baffles 8 that are parallel to each other and parallel to the length direction of the second template 9 are provided. The two second baffles 8 are front-back parallel; the length of the second template 9 is less than the length of the second baffle 8, and the width of the first baffle 6 plus the thickness of the first template 5 is equal to the difference between the second template 9 and the second baffle 8. The lengths by which the left and right ends of the second baffle 8 extend beyond the left and right ends of the second template 9 are the same. The thickness of the first template 5 plus the width of the first baffle 6 is equal to the distance by which the left end of the second baffle 8 extends beyond the left end of the second template 9, so that the two first templates 5 and the second template 9 form a "C"-shaped structure; the front first baffle 6 and the first template 5 are in a detachable fit, and the front second baffle 8 and the second template 9 are in a detachable fit. When the second concrete protection board is poured, since the protection board poured for the first time can serve as the function of the front first baffle 6 and the second baffle 8, the second-poured concrete protection board is directly poured together with the first-poured concrete protection board. The subsequent pouring of the concrete protection board is the same; of course, in some embodiments, when the second concrete protection board is poured, a gap can be left between it and the first protection board. After the second concrete protection board hardens, concrete is poured into the gap between the two protection boards. The whole of this paragraph constitutes a template assembly for pouring a concrete protection board.

[0044] Between the first template 5 and the support frame 1, several first support blocks 3 are provided. Preferably, 3 first support blocks 3 are provided. At both ends of each first support block 3, a first slider 2 is fixed. First chutes for the first sliders 2 to insert and slide horizontally are opened on both the first template 5 and the support frame 1. The first slider 2 is located in the first chute, which can prevent the first support block 3 from sliding up and down, so as to better support the first template 5. Moreover, after the first template 5 and the first baffle 6 are placed in place, the first slider 2 is aligned with the first chute, so as to facilitate pushing the first support block 3 between the first template 5 and the support frame 1 and also prevent the first support block 3 from shifting; of course, in some embodiments, the first support block 3 can be a hollow fixed block, and the height of the first support block 3 is about the same as the height of the side wall of the support frame 1. The whole of it is placed between the first template 5 and the support frame 1 to support the first template 5. The whole of this paragraph constitutes a first support assembly for supporting the first template 5.

[0045] A fourth slider 4 is fixed to the bottom of the first template 5 on the side away from the first baffle 6, and the fourth slider 4 can slide in the first slide groove. The thickness of the fourth slider 4 is consistent with the thickness of the first slider 2. When the first template 5 and the first baffle 6 are placed in the installation groove, the fourth slider 4 is located in the first slide groove at the lower left, and then the first template 5 and the first baffle 6 are pushed, and then the fourth slider 4 is moved out of the first slide groove, so that the first template 5 and the first baffle 6 are located in the installation groove, which makes it easier to place the first template 5 and the first baffle 6.

[0046] A plurality of second support blocks 12 are arranged between the support frame 1 and the second template 9. The second support blocks 12 are arranged in sequence from left to right. Second sliders 13 are fixed at both ends of the second support blocks 12. The top of the support frame 1 and the bottom of the second template 9 are provided with second slide grooves for inserting and horizontally sliding the second slider 13. The content of this paragraph as a whole constitutes a second support assembly for supporting the second template 9.

[0047] When installing the first template 5 and the second template 9, as Figure 8 As shown, the first template 5 and the first baffle 6 are installed first, and then the second template 9 and the second baffle 8 are pushed to the top of the support frame 1 for installation. The second template 9 can also support the tops of the two first templates 5. Of course, in order to make the support effect at both ends of the second template 9 good and to reduce the displacement of the second template 9 during the pushing process, third sliders 7 are fixed at both ends of the second template 9. The thickness of the third slider 7 is less than that of the second template 9, and the top of the first template 5 is provided with a third slide groove for the third slider 7 to be inserted and slide back and forth.

[0048] A roller 11 is installed at the bottom of one side of the second template 9. The roller 11 is a directional wheel. Two rollers 11 are installed, and the two rollers 11 are installed at the bottom of the rear side of the second template 9. When the second template 9 and the second baffle 8 are pushed, the rear side of the second template 9 is inserted first. At this time, the roller 11 can support the rear side of the second template 9, so that the pushing of the second template 9 is smoother. Of course, the pushing of the second template 9 and the pushing of the first support block 3 and the second support block 12 are all completed by using a hammer or a pushing mechanism, such as a hydraulic cylinder; when pouring concrete, a gap is made between the second baffle 8 and the top of the mounting groove, and then the concrete is transported into the template through a pump pipe.

[0049] The second support block 12 and one end of the first support block 3 are provided with through holes along their thickness direction, that is, the through holes on the first support block 3 are connected vertically, and the through holes on the second support block 12 are connected left to right, and the through holes on the first support block 3 and the second support block 12 are both located on the front side. After the concrete protective plate hardens, a rope can be passed through the through hole, and the first support block 3 and the second support block 12 can be pulled out by a traction mechanism for easy disassembly.

[0050] The construction method of the protection device is as follows:

[0051] S1. According to the design plan, construct a working pit; the construction of the working pit is the same as that of the working pit in the existing shallow tunneling method.

[0052] S2. As shown in Figure 5 , excavate a protection groove on the soil body in the excavation direction for inserting the support frame 1. The protection groove is in a "C" - shaped structure with the opening facing downwards.

[0053] In step S2, the excavation of the protection groove is first carried out by a drilling device to make continuous holes, and then manually trimmed. The drilling device can be the existing equipment for drilling anchor holes or the existing equipment for drilling conduit insertion holes in the shallow tunneling method. By using the drilling device to make continuous holes to form a "C" - shaped structure with the opening facing downwards, and then manually using a flat shovel for trimming. The flat shovel is a handle with a flat shovel surface at the front end. When trimming, the trimmed soil can be put into the side wall of the protection groove and then removed, making the excavation of the protection groove relatively easy.

[0054] S3. As shown in Figure 6 , install the support frame 1 in the protection groove, as shown in Figure 7 , and excavate an installation groove for installing the template assembly on the outside of the protection groove.

[0055] S4. Install the template assembly into the installation groove and pour concrete to form a protection plate; the installation of the template assembly is as shown in Figure 8 and Fig. 9 . First, insert the first template 5 and the first baffle 6 into the installation groove and support them by the first support block 3. Then, install the second template 9 and the second baffle 8 on the top of the first template 5 and the first baffle 6, so that the two first templates 5 and the second template 9 as a whole are in a "C" - shaped structure with the opening facing downwards. Of course, when pouring the concrete protection plate, a steel mesh is tied in the concrete protection plate. The installation of the steel mesh in the first template 5 and the first baffle 6 can be pre - fabricated, then vertically attached to the side wall of the installation groove, and then install the first baffle 6. The steel mesh on the top can be placed on the top of the second template 9 and enter together with the second baffle 8 and the second template 9.

[0056] S5. As shown in Fig.10 , excavate the soil in the support frame 1.

[0057] S6. As shown in Fig.11 , disassemble the template assembly and the support frame 1.

[0058] In step S6, after removing the formwork assembly and the support frame 1, a temporary support is added to support the top of the protective plate. The temporary support is a steel beam or a steel pipe, which can reduce the force on the top of the concrete protective plate and increase the initial stability of the concrete protective plate.

[0059] S7, such as Fig.12 As shown, then repeat steps S1 to S6 according to the excavation direction to the designed length of the underground pipe gallery; that is, continuous construction in sections. After the tunnel excavation is completed, the bottom plate is laid and the gallery is constructed by laying the bottom plate and constructing the gallery in the existing shallow buried dark excavation method.

[0060] By using the support frame 1, there is no need to perform advance support to harden the soil in front, and after pouring concrete to form a protective plate in step S4, the soil in the support frame 1 can be excavated while waiting for the concrete to harden in step S4. This is equivalent to constantly excavating the soil. First, the number of hardening times is reduced, and second, the soil is also being excavated during the hardening process, which makes full and reasonable use of time, thereby reducing the construction period of the shallow buried tunneling method.

[0061] At the same time, when the height of the installation trench to be excavated is relatively high, its construction method is consistent with the existing shallow buried dark excavation method. The formwork assembly and the support frame 1 are equivalent to constructing the top of the protective device. During the continued construction process, the soil below the protective plate that has been cast and hardened can be excavated, and then concrete connected to the protective plate can be poured on the side wall to deepen the height of the installation trench. Of course, this construction method is suitable for relatively stable soil.

Claims

1. A protective device for underground pipe gallery construction, comprising a support frame (1), characterized in that: The support frame (1) is integrally in a "C" - shaped structure, and a formwork assembly for pouring a concrete protection plate is arranged on the outer side of the support frame (1); The construction method of this protection device is as follows: S1. Build a working pit according to the design plan; S2. Excavate a protection groove for inserting the support frame (1) in the soil body in the excavation direction. The protection groove is in a "C" - shaped structure with the opening facing downwards; S3. Install the support frame (1) in the protection groove, and excavate an installation groove for installing the formwork assembly on the outer side of the protection groove; S4. Install the formwork assembly into the installation groove and pour concrete to form a protection plate; S5. Excavate the soil body inside the support frame (1); S6. Dismantle the formwork assembly and the support frame (1); S7. Then repeat the steps from S1 to S6 according to the excavation direction until reaching the designed length of the underground pipe gallery.

2. The underground pipe gallery construction protection device according to claim 1 is characterized in that: The support frame (1) is made of steel plates.

3. The underground pipe gallery construction protection device according to claim 2 is characterized in that: The formwork assembly includes two vertically arranged first formworks (5) and one horizontally arranged second formwork (9). On one side of each first formwork (5), there are two parallel first baffles (6) perpendicular to the length of the first formwork (5). On the top of the second formwork (9), there are two parallel second baffles (8) parallel to the length direction of the second formwork (9); The length of the second formwork (9) is less than the length of the second baffle (8), and the width of the first baffle (6) plus the thickness of the first formwork (5) is equal to the difference between the second formwork (9) and the second baffle (8); An independent first support assembly for supporting the first formwork (5) is arranged between the support frame (1) and the first formwork (5), and a second support assembly for supporting the second formwork (9) is arranged between the support frame (1) and the second formwork (9).

4. The underground pipe gallery construction protection device according to claim 3 is characterized in that: The first support assembly includes several first support blocks (3). At both ends of each first support block (3), there are first sliders (2) fixed. First chutes for the first sliders (2) to insert and slide horizontally are opened on both the first formwork (5) and the support frame (1).

5. The underground pipe gallery construction protection device according to claim 4 is characterized in that: At the bottom of the side of the first formwork (5) away from the first baffle (6), a fourth slider (4) is fixed, and the fourth slider (4) can slide in the first chute.

6. The underground pipe gallery construction protection device according to claim 5 is characterized in that: The second support assembly includes several second support blocks (12). At both ends of each second support block (12), there are second sliders (13) fixed. Second chutes for the second sliders (13) to insert and slide horizontally are opened on both the support frame (1) and the second formwork (9).

7. The underground pipe gallery construction protection device according to claim 6 is characterized in that: On one side of the bottom of the second formwork (9), a roller (11) is installed.

8. The underground pipe gallery construction protection device according to claim 7 is characterized in that: One end of the second support block (12) and the first support block (3) is provided with a through - hole along its thickness direction.

9. The underground pipe gallery construction protection device according to claim 1 or 8, characterized in that: In step S2, the excavation of the protection groove is first carried out by a drilling device for continuous drilling, and then manually trimmed.

10. The underground pipe gallery construction protection device according to claim 9 is characterized in that: In step S6, after removing the formwork assembly and the support frame (1), additional temporary supports are added to support the top of the protection plate.

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