Special composite concrete segment for mechanical communication channel and construction method

Abstract

The present invention provides a special composite concrete pipe segment and construction method for a mechanical communication channel, including a non-hole area pipe segment and a hole area pipe segment; the non-hole area pipe segment is a reinforced concrete pipe segment; the hole area pipe segment includes a non-cutting part, a cutting part, and an embedded steel plate, the hole area non-cutting part is a reinforced concrete structure, the hole area cutting part is a steel cellulose concrete structure, the embedded steel plate is arranged at the connection position of the hole area non-cutting part and the hole area cutting part, and the steel skeleton of the hole area non-cutting part is welded and fixed with the embedded steel plate; glass fiber reinforcement is arranged at the edge of the hole area cutting part, and the glass fiber reinforcement passes through the embedded steel plate and is anchored in the hole area non-cutting part, so that the hole area non-cutting part and the hole area cutting part become a whole. The present invention optimizes the block structure of the hole area pipe segment, saves construction time and reduces construction cost under the premise of simplifying pipe segment production and facilitating construction.

Description

Technical Field

[0001] The invention belongs to the technical field of shield segments, and in particular relates to a special composite concrete segment for a mechanical communication channel and a construction method. Background Art

[0002] At present, the connecting channel is mainly constructed by mining method. In recent years, with the development of prefabricated construction technology, the construction of connecting channels by mechanical method has gradually become popular. At present, in the project of connecting channel construction by mechanical method, the special lining segment of the main tunnel is composed of 3 rings, each ring is composed of 4 reinforced concrete segments and 2 steel-glass fiber reinforced concrete composite segments. Among them, the steel-glass fiber reinforced concrete composite segment is composed of steel segments and glass fiber reinforced concrete segments cast and spliced ​​as a whole. The production process of steel-glass fiber reinforced concrete composite segment: the steel structure manufacturer produces the steel segment part → the steel segment part is transported to the concrete segment manufacturer → the glass fiber reinforcement is tied and fixed on the steel segment → the tied glass fiber reinforcement and steel segment are cast into the mold as a whole → the steel-glass fiber reinforced concrete composite segment is formed.

[0003] It is not difficult to see from the above steel-glass fiber reinforced concrete composite pipe segment production process that the production of steel pipe segments and concrete pipe segments need to be processed by two suppliers, which will cause a certain amount of construction period waste, and the deformation of steel structure welding often leads to difficulties in entering the mold later. The pipe segment production process is relatively cumbersome and the cost is higher than that of traditional reinforced concrete pipe segments. In addition, since the steel-glass fiber reinforced concrete composite pipe segment is made of two different materials, and the two parts of different materials are irregular in shape, it is difficult to determine the center of gravity and hanging point of the steel-glass fiber reinforced concrete composite pipe segment, which makes on-site hoisting difficult. Summary of the invention

[0004] In order to solve the above technical problems, the present invention provides a special composite concrete segment and a construction method for a mechanical communication channel. On the premise of meeting the construction requirements and structural safety of the mechanical communication channel, the problems of complex segment production process, difficulty in determining the center of gravity during lifting, and welding deformation are solved, thereby ultimately achieving the purpose of facilitating on-site lifting, saving construction time and reducing construction costs.

[0005] In order to achieve the above object, the technical solution adopted by the present invention is as follows:

[0006] In the first aspect, the present invention provides a special composite concrete pipe segment for mechanical communication channel construction, including non-hole area segments and hole area segments; the non-hole area segments are reinforced concrete segments; the hole area segments include non-cutting parts of the hole area, cutting parts of the hole area, and embedded steel plates, the non-cutting parts of the hole area are reinforced concrete structures, the cutting parts of the hole area are steel-cellulose concrete structures, the embedded steel plates are arranged at the connection position of the non-cutting parts of the hole area and the cutting parts of the hole area, and the steel skeleton of the non-cutting parts of the hole area is welded and fixed to the embedded steel plates; glass fiber reinforcements are arranged at the edges of the cutting parts of the hole area, and the glass fiber reinforcements pass through the embedded steel plates and are anchored in the non-cutting parts of the hole area, so that the non-cutting parts of the hole area and the cutting parts of the hole area become a whole.

[0007] Preferably, the single-ring special composite concrete segment is assembled from four non-hole area segments and two hole area segments; the mechanical communication channel is provided with three-ring special composite concrete segments on the left and right lines respectively.

[0008] Preferably, adjacent single-ring special composite concrete segments are assembled and connected by means of bolt hand holes reserved in the annular seams in combination with bent bolts; the non-opening area segments and the non-opening area segments, the non-opening area segments and the opening area segments, and the opening area segments and the opening area segments in the single-ring special composite concrete segments are assembled and connected by means of bolt hand holes reserved in the longitudinal seams in combination with bent bolts.

[0009] Preferably, two water-swellable waterstop strips are provided on both sides of the embedded steel plate, and a grouting pipe is embedded between the two water-swellable waterstop strips; grouting holes are provided around the cutting part of the opening area for the reinforcement grouting of the soil layer around the opening in the later stage.

[0010] Preferably, the embedded steel plate is a galvanized steel plate.

[0011] In a second aspect, the present invention further provides a construction method for a special composite concrete segment for mechanically constructing a communication channel, the method comprising the following steps:

[0012] Step S1, producing segments according to the location of the segments in the opening area and the non-opening area, and using reinforced concrete segments in the non-opening area according to the conventional reinforced concrete segment production process and flow;

[0013] Step S2, producing the segment in the hole area, where the segment in the hole area includes a non-cutting portion in the hole area, a cutting portion in the hole area and a pre-buried steel plate;

[0014] The steel skeleton in the non-cutting part of the opening area is tied on the jig, and glass fiber reinforcement is arranged at the edge of the cutting part of the opening area, and the glass fiber reinforcement is passed through the embedded steel plate and anchored in the non-cutting part of the opening area, so that the non-cutting part of the opening area and the cutting part of the opening area become a whole, and the steel skeleton close to the embedded steel plate in the non-cutting part of the opening area is welded and fixed to the embedded steel plate, so that the steel skeleton and the glass fiber reinforcement skeleton are tied and fixed to the embedded steel plate, so that the steel skeleton, the embedded steel plate, and the glass fiber reinforcement form a complete skeleton form;

[0015] Step S3, two water-swellable waterproofing strips are respectively arranged on both sides of the embedded steel plate, and a grouting pipe is embedded between the two water-swellable waterproofing strips, and the grouting pipe is fixed;

[0016] Step S4, after checking the size deviation and quality of the steel skeleton, embedded steel plate, and glass fiber reinforcement skeleton, hoist them into the mold for segment casting construction, the non-cutting part of the opening area is cast with ordinary concrete, and the cutting part of the opening area is cast with steel cellulose concrete;

[0017] Step S5, the prefabricated non-hole area segments and hole area segments are divided into blocks for cutting, bending resistance, drawing, impermeability and three-ring test assembly tests to ensure that the products are qualified and meet the on-site implementation requirements;

[0018] Step S6, assembling the segments in the non-hole-opening area and the segments in the hole-opening area at the construction site by using the bolt hand holes reserved in the longitudinal seams and the bolt hand holes reserved in the circumferential seams in combination with bent bolts;

[0019] Step S7, after the pipe segments are assembled, the opening area is cut mechanically, and the mechanical communication channel construction is carried out.

[0020] Preferably, in step S4, the pouring quality of the non-cutting part of the opening area and the cutting part of the opening area is controlled during pouring, and steam curing and water curing are carried out to meet the quality requirements of the prefabricated segments, and cement-based penetrating crystalline coating is applied to the inner and outer surfaces of the segments at the joints where the embedded steel plates are located.

[0021] The present invention has the following beneficial effects:

[0022] The special composite concrete pipe segment and construction method for mechanical communication channels provided by the present invention optimize the block structure of the pipe segment in the opening area, save construction time and reduce construction costs while simplifying pipe segment production and facilitating construction.

[0023] The segment structure of the opening area used for the mechanical method communication channel is simple, all of which adopt the concrete structure form, and there is no steel segment structure, which avoids the risk of steel segment welding deformation and difficulty in casting in the mold in the later stage. At the same time, it avoids the cumbersome processing of steel segment production and concrete segment production by two suppliers, making the segment production routine, simple to operate, saving prefabrication time, and reducing construction costs. In addition, since the entire ring of the special lining segment adopts the concrete structure form, the center of gravity and the position of the lifting point of the segment block are relatively easy to determine, which is convenient for on-site lifting and installation. The present invention is suitable for the special segment structure form of the main tunnel required for the implementation of the mechanical method communication channel, and can also be used for underground structures such as comprehensive pipeline corridors with side channels. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for describing the embodiments are briefly introduced below. Obviously, the drawings described below are only some embodiments of the embodiments of the present invention.

[0025] Figure 1 It is a schematic plan view of the special composite concrete segment structure used for the mechanical communication channel according to an embodiment of the present invention;

[0026] Figure 2 It is a schematic elevation diagram of the opening position of the special lining segment in the embodiment of the present invention;

[0027] Figure 3 This is a plan view of the hole-dividing blocks in an embodiment of the present invention;

[0028] Figure 4 This is a schematic elevation diagram of the opening blocks in an embodiment of the present invention;

[0029] Figure 5 This is a schematic plan view of the block reinforcement with holes opened in an embodiment of the present invention;

[0030] Figure 6 It is a schematic diagram of the waterproof plane of the joints of the divided steel plates with holes in an embodiment of the present invention.

[0031] Description of reference numerals:

[0032] 1. Pipe segments in non-opening areas; 2. Non-cutting parts in opening areas; 3. Cutting parts in opening areas; 4. Embedded steel plates; 5. Longitudinal seams of pipe segments; 6. Circumferential seams of pipe segments; 7. Grouting holes; 8. Hand holes reserved for bolts in longitudinal seams; 9. Hand holes reserved for bolts in circumferential seams; 10. Steel bar skeleton; 11. Fiberglass bars; 12. Grouting pipes; 13. Water-expandable waterstop strips; 14. Cement-based penetrating crystalline coating; 15. Elastic sealing pads. DETAILED DESCRIPTION

[0033] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention is described in detail below with reference to the accompanying drawings and specific embodiments.

[0034] This embodiment provides a special composite concrete segment for mechanical construction of communication channels, such as Figures 1 to 6 As shown, it includes a non-hole area segment 1 and a hole area segment; the non-hole area segment 1 is a reinforced concrete segment; the hole area segment includes a hole area non-cutting part 2, a hole area cutting part 3, and an embedded steel plate 4. The hole area non-cutting part 2 is a reinforced concrete structure, and the hole area cutting part 3 is a steel-cellulose concrete structure. The embedded steel plate 4 is arranged at the connection position of the hole area non-cutting part 2 and the hole area cutting part 3. The steel skeleton 10 of the hole area non-cutting part 2 is welded and fixed to the embedded steel plate 4. The hole area segment is composed of reinforced concrete, embedded steel plate 4, and steel-cellulose concrete. Glass fiber reinforcement 11 is arranged at the edge of the hole area cutting part 3. The glass fiber reinforcement 11 passes through the embedded steel plate 4 and is anchored in the hole area non-cutting part 2, so that the hole area non-cutting part 2 and the hole area cutting part 3 become a whole. After the steel skeleton 10 of the non-cutting part 2 of the opening area is tied, the embedded steel plate 4 and the glass fiber reinforcement 11 are fixed, the non-cutting part 2 of the opening area (reinforced concrete structure) and the cutting part 3 of the opening area (steel cellulose concrete structure) can be cast on a set of molds at the same time, and cast in one time. The steel cellulose concrete structure is mixed with a certain proportion of steel fiber and plain concrete, and is used to cast the structure of the opening area of ​​the pipe segment to meet the requirements of later cutting and opening.

[0035] The single-ring special composite concrete segment is composed of four non-hole area segments 1 and two hole area segments, with a ring width of 1.5m; three rings of special composite concrete segments are set on the left and right lines of the mechanical communication channel. The adjacent single-ring special composite concrete segments are assembled and connected through the reserved bolt hand holes 9 in the ring seam with bent bolts; the non-hole area segments 1 and non-hole area segments 1, the non-hole area segments 1 and the hole area segments, and the hole area segments and the hole area segments in the single-ring special composite concrete segments are assembled and connected through the reserved bolt hand holes 8 in the longitudinal seam with bent bolts.

[0036] Two water-swellable waterproofing strips 13 are respectively arranged on both sides of the embedded steel plate 4, and a grouting pipe 12 is pre-buried between the two water-swellable waterproofing strips 13; grouting holes 7 are arranged around the cutting part 3 of the opening area for the reinforcement grouting of the soil layer around the opening in the later stage. The inner and outer surfaces of the pipe segments at the joint position of the embedded steel plate 4 are painted with cement-based penetrating crystalline coating 14; the embedded steel plate 4 is a galvanized steel plate.

[0037] The groove on the end face of the special composite concrete segment is provided with an elastic sealing pad 15. The segment annular seam 6 of the special composite concrete segment is provided with a concave and convex tenon, and a reinforcing steel bar is provided in the concave and convex tenon, and a positioning rod is provided in the segment longitudinal seam 5. These two items are universal requirements for segment design.

[0038] The special composite concrete segments used for mechanical communication channel construction are all processed and produced by segment manufacturers. According to the designed size specifications of the segments, molds, molds, materials and other production requirements are prepared.

[0039] This embodiment also provides a construction method for a special composite concrete segment for mechanically constructing a communication channel, the method comprising the following steps:

[0040] Step S1, differentiated segment production is performed according to whether the segment is located in the opening area or the non-opening area. The segment 1 in the non-opening area adopts reinforced concrete segments and is implemented according to conventional reinforced concrete segment production technology and process.

[0041] Step S2, production of the hole area segment, the hole area segment includes the hole area non-cutting part 2, the hole area cutting part 3 and the embedded steel plate 4; binding of the steel skeleton 10 in the hole area non-cutting part 2 is performed on the jig, glass fiber reinforcement 11 is arranged at the edge of the hole area cutting part 3, and the glass fiber reinforcement 11 is passed through the embedded steel plate 4 and anchored in the hole area non-cutting part 2, so that the hole area non-cutting part 2 and the hole area cutting part 3 become a whole, and the steel skeleton 10 in the hole area non-cutting part 2 close to the embedded steel plate 4 is welded and fixed to the embedded steel plate 4, so that the steel skeleton 10 and the glass fiber reinforcement skeleton 11 are completed and fixed to the embedded steel plate 4, so that the steel skeleton 10, the embedded steel plate 4 and the glass fiber reinforcement 11 form a complete skeleton form.

[0042] Step S3, two water-swellable waterproofing strips 13 are respectively arranged on both sides of the embedded steel plate 4, and a grouting pipe 12 is embedded between the two water-swellable waterproofing strips 13, and the grouting pipe 12 is fixed.

[0043] Step S4, after checking the size deviation and quality of the steel skeleton 10, the embedded steel plate 4, and the glass fiber reinforcement 11, they are hoisted into the mold for segment casting construction. The non-cutting part 2 of the opening area is cast with ordinary concrete, and the cutting part 3 of the opening area is cast with steel cellulose concrete. During the casting process, the casting quality is controlled, and necessary steam curing and water curing are carried out to meet the quality requirements of the prefabricated segment, and cement-based penetrating crystalline coating 14 is applied to the inner and outer surfaces of the segment at the joint position of the embedded steel plate 4.

[0044] Step S5, the prefabricated non-hole area segments 1 and hole area segments are divided into blocks for cutting, bending resistance, pulling, seepage resistance and three-ring test assembly tests to ensure that the products are qualified and meet the on-site implementation requirements.

[0045] Step S6, after meeting various test and inspection indicators, a factory certificate is issued, and the pipe segments are transported to the site. At the construction site, the pipe segments 1 in the non-hole area and the pipe segments in the hole area are assembled through the longitudinal seam reserved bolt hand holes 8 and the circumferential seam reserved bolt hand holes 9 in combination with bent bolts.

[0046] Step S7, after the segment assembly is completed and all preparatory work is completed, the cutting part 3 of the opening area is mechanically cut to carry out the mechanical communication channel construction.

[0047] It can be seen from the above technical solutions that the special composite concrete segments and construction methods for the mechanical communication channel provided in this embodiment optimize the segment block structure in the opening area, and save construction time and reduce construction costs under the premise of simplifying segment production and facilitating construction. The segment structure in the opening area of ​​the mechanical communication channel is simple, and all adopts a concrete structure. There is no steel segment structure, which avoids the risk of steel segment welding deformation and difficulty in casting in the mold in the later stage. At the same time, it avoids the cumbersome processing of steel segment production and concrete segment production by two suppliers, making segment production routine, simple to operate, saving prefabrication time and reducing construction costs. In addition, since the entire ring of the special lining segment adopts a concrete structure, the center of gravity and the position of the lifting point of the segment block are relatively easy to determine, which is convenient for on-site lifting and installation. The present invention is suitable for the special segment structure of the main tunnel required for the implementation of the mechanical communication channel, and can also be used for underground structures such as comprehensive pipeline corridors with side channels.

[0048] The above embodiments of the present invention are described in detail through examples, but the contents described are only exemplary embodiments of the embodiments of the present invention and cannot be considered to limit the scope of implementation of the embodiments of the present invention. The protection scope of the embodiments of the present invention is defined by the claims. Anyone who utilizes the technical solutions described in the embodiments of the present invention, or who, inspired by the technical solutions of the embodiments of the present invention, designs similar technical solutions within the essence and protection scope of the embodiments of the present invention to achieve the above technical effects, or who makes equal changes and improvements to the scope of application, shall still fall within the scope of protection covered by the patent of the embodiments of the present invention.

Claims

1. A construction method for a special composite concrete segment for mechanical communication channel construction, It is characterized in that The special composite concrete pipe segment for mechanical method communication channel construction comprises a non-hole area pipe segment (1) and a hole area pipe segment; the non-hole area pipe segment (1) is a reinforced concrete pipe segment; the hole area pipe segment comprises a hole area non-cutting part (2), a hole area cutting part (3), and a pre-buried steel plate (4); the hole area non-cutting part (2) is a reinforced concrete structure; the hole area cutting part (3) is a steel fiber concrete structure; the pre-buried steel plate (4) is arranged at the connection position of the hole area non-cutting part (2) and the hole area cutting part (3); the steel bar skeleton (10) of the hole area non-cutting part (2) is welded and fixed to the pre-buried steel plate (4); glass fiber ribs (11) are arranged at the edge of the hole area cutting part (3); the glass fiber ribs (11) pass through the pre-buried steel plate (4) and are anchored in the hole area non-cutting part (2), so that the hole area non-cutting part (2) and the hole area cutting part (3) become a whole; The method comprises the following steps: Step S1, producing segments according to the location of the segments in the opening area and the non-opening area, wherein the segments in the non-opening area (1) are reinforced concrete segments, and are produced according to conventional reinforced concrete segment production processes and procedures; Step S2, producing the segment in the hole area, the segment in the hole area comprising a non-cutting portion in the hole area (2), a cutting portion in the hole area (3) and a pre-buried steel plate (4); The steel skeleton (10) in the non-cutting portion (2) of the opening area is tied on the jig, and glass fiber tendons (11) are arranged at the edge of the cutting portion (3) of the opening area, and the glass fiber tendons (11) are passed through the embedded steel plate (4) and anchored in the non-cutting portion (2) of the opening area, so that the non-cutting portion (2) of the opening area and the cutting portion (3) of the opening area become a whole, and the steel skeleton (10) in the non-cutting portion (2) of the opening area close to the embedded steel plate (4) is welded and fixed to the embedded steel plate (4), so that the steel skeleton (10) and the glass fiber tendons (11) are tied and fixed to the embedded steel plate (4), so that the steel skeleton (10), the embedded steel plate (4), and the glass fiber tendons (11) form a complete skeleton form; Step S3, two water-swellable waterproofing strips (13) are respectively arranged on both sides of the embedded steel plate (4), and a grouting pipe (12) is pre-buried between the two water-swellable waterproofing strips (13), and the grouting pipe (12) is fixed; grouting holes (7) are arranged around the cutting part (3) of the opening area; Step S4, after checking the size deviation and quality of the steel skeleton (10), the embedded steel plate (4), and the glass fiber reinforcement (11), they are hoisted into the mold for segment casting construction, the non-cutting part (2) of the opening area is cast with ordinary concrete, and the cutting part (3) of the opening area is cast with steel cellulose concrete.

2. A construction method for a special composite concrete segment for mechanical communication channel construction according to claim 1, It is characterized in that After completing step S4, the prefabricated non-hole area segments (1) and hole area segments are divided into blocks for cutting, bending resistance, pulling, water-resistance and three-ring trial assembly tests to ensure that the products are qualified and meet the requirements of on-site implementation; then, the non-hole area segments (1) and hole area segments are assembled at the construction site; after the segment assembly is completed, the hole area cutting part (3) is mechanically cut to carry out mechanical connection channel construction.

3. A construction method for a special composite concrete segment for mechanical communication channel construction according to claim 2, It is characterized in that The single-ring special composite concrete segment is assembled from four non-hole area segments (1) and two hole area segments; the mechanical method communication channel is provided with three rings of special composite concrete segments on the left and right lines respectively.

4. A construction method for a special composite concrete segment for mechanical communication channel construction according to claim 3, It is characterized in that Adjacent single-ring special composite concrete segments are assembled and connected by bolt hand holes (9) reserved in the annular seams in combination with bent bolts; non-hole area segments (1) and non-hole area segments (1), non-hole area segments (1) and hole area segments, and hole area segments and hole area segments in the single-ring special composite concrete segments are assembled and connected by bolt hand holes (8) reserved in the longitudinal seams in combination with bent bolts.

5. The construction method of a special composite concrete segment for mechanical communication channel construction according to claim 1, It is characterized in that In step S4, the pouring quality of the non-cutting portion (2) of the opening area and the cutting portion (3) of the opening area is controlled during pouring, and steam curing and water curing are performed to meet the quality requirements of the prefabricated pipe segment, and a cement-based penetrating crystalline coating (14) is applied to the inner and outer surfaces of the pipe segment at the joint position where the embedded steel plate (4) is located.

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