WO2018076489A1

WO2018076489A1 - Comprehensive bamboo composite pipe gallery

Info

Publication number: WO2018076489A1
Application number: PCT/CN2016/110006
Authority: WO
Inventors: 叶柃; 殷建学; 赵柱石
Original assignee: 浙江鑫宙竹基复合材料科技有限公司; 叶柃
Priority date: 2016-10-31
Filing date: 2016-12-15
Publication date: 2018-05-03
Also published as: CN108018876B; CN108018876A

Abstract

A comprehensive bamboo composite pipe gallery. A pipe body constituting the pipe gallery successively comprises, from inside to outside, a liner layer, a structural layer, and an outer protective layer along the radial direction of the pipe body; the liner layer is obtained by curing raw materials comprising a liner layer resin and bamboo fiber nonwoven fabric; the structural layer is obtained by curing the raw materials comprising a structural layer resin, bamboo strips, and a bio-based filler; the bamboo strips are wound while the structural layer resin to which the bio-based filler is added is impregnated; the inner diameter of the pipe body at least is 2,000mm, and a stiffness level at least is 5,000/m².

Description

Bamboo composite integrated pipe gallery

[Technical Field]

The invention belongs to the technical field of municipal facilities, and more particularly to a bamboo composite integrated pipe gallery, which is a kind of stress-free pipe gallery.

【Background technique】

The pipe gallery is a municipal facility built on the underground of the city for the laying of municipal pipelines. It integrates various municipal pipelines such as electric power, communication, radio and television, gas, water supply and drainage, and heat, effectively utilizing the space under the road, conserving underground space resources, and eliminating irregular excavation of various professional pipelines. The impact of the passage and the surrounding environment completely solved the problems of “road zipper” and “air spider web”.

At present, most of the pipe corridors are cast-in-place or prefabricated, and most of them use reinforced concrete structures. However, this structure consumes a lot of materials, has a large amount of construction work, has a long construction period, and is expensive, making it more and more difficult to adapt to the needs of modern urban construction.

Bamboo materials are renewable green materials. In recent years, with the increasing maturity of bamboo-wound composite technology (for example, Chinese patent documents CN105546230A, CN101571213A, CN202327397U, CN 104033724A, etc.), bamboo-wound related products are low in production cost and products. The characteristics of good performance and green preparation of environmental protection have been paid more and more attention by manufacturers and consumers, and the market share has been continuously improved. Bamboo-wound composite products, such as bamboo-wound composite pipes, utility poles, pipe porches, silos, and high-speed rail casings, can be widely used in various industries.

Bamboo composite pipe gallery (bamboo composite integrated pipe gallery) as a new type of pipe gallery (such as Chinese patent application CN105042213A, CN105064399A, etc.), due to its use of bio-based materials, especially bamboo materials, such renewable green materials, low cost It is green and environmentally friendly. Although the bamboo composite pipe gallery has the advantages of green environmental protection, due to the large diameter of the pipe gallery and the characteristics buried in the ground, the internal stress and external pressure are large when applied, how to improve the bamboo composite pipe gallery Strength and stability, and prolonged service life are still issues that cannot be ignored in the application of bamboo composite pipe gallery.

[Summary of the Invention]

In view of the above defects or improvement requirements of the prior art, an object of the present invention is to provide a bamboo composite integrated pipe gallery, wherein the structural arrangement of the key pipe trunk body and the corresponding materials and processes used for each layer structure are provided. The improvement can effectively solve the problem of low stability and short life of the bamboo composite pipe gallery compared with the prior art, and the bamboo composite integrated pipe gallery has no stress and high strength, and is very suitable for the harsh underground environment of the pipe gallery. Can greatly extend the service life of the pipe gallery.

In order to achieve the above object, according to the present invention, a bamboo composite integrated pipe gallery is provided, characterized in that the pipe gallery comprises a pipe body, and the pipe body comprises an inner lining layer and a structural layer in order from the inside to the outside in the pipe diameter direction. And outer protective layer;

The inner liner layer is obtained by curing a raw material including an inner liner resin and a bamboo fiber nonwoven fabric;

The structural layer is obtained by curing a raw material including a structural layer resin, a bamboo raft, and a bio-based filler; the structural layer is formed by winding the bamboo raft, and the bamboo raft is added while being entangled. The structural layer resin having the bio-based filler;

Further, the inner diameter of the pipe body is not less than 2000 mm, and the rigidity level is at least 5000 N/m ² .

As a further preferred embodiment of the present invention, for the inner liner layer, the bamboo fiber nonwoven fabric satisfies: bamboo fiber content: ≥98%; areal density: 40-50 g/m ² ; tensile breaking strength: longitudinal direction ≥120N; Horizontal ≥ 30N; water content: 8 ~ 15%; water soaking rate at 25 ° C: ≤ 12s;

For the structural layer,

The structural layer resin satisfies the post-cure: impact strength a _cu ≥ 50KJ / m ² ; tensile strength ≥ 20MPa; Barcol hardness ≥ 50HBa; water absorption ≤ 0.5%;

The bio-based filler has a particle size of from 60 mesh to 80 mesh.

As a further preferred embodiment of the present invention, the raw material in the structural layer further includes a mesh cloth wrapped around the outside of the bamboo raft; the mesh cloth satisfies: areal density: 30-40 g/m ² ; tensile breaking strength: longitudinal ≥ 200N; latitude ≥ 150N; elongation at break: ≤ 5%; acid retention: ≥ 90%.

Further preferably, in the structural layer, the bamboo rafts satisfy: a radial tensile strength of 60 MPa to 100 MPa; a bamboo fiber content of 35% to 45%; and a water content of 8% to 12%;

Preferably, the bamboo raft is a bamboo drapes, and the bamboo drapes are formed by a plurality of bamboo slabs connected by a braiding line, wherein the bamboo rafts are arranged in parallel at equal intervals in the width direction of the bamboo raft, and the bamboo curtain comprises an axial direction. a bamboo curtain and a circular bamboo curtain, wherein a length direction of the axial bamboo curtain is consistent with a width direction of the bamboo sheet, and a length direction of the circular bamboo curtain is consistent with a longitudinal direction of the bamboo sheet; The tensile strength of the circumferential bamboo strip is 1400N-1600N, and the tensile strength of the axial bamboo strip is 180N-220N.

Further preferably, the inner liner layer has a thickness of from 4.5 mm to 5.5 mm.

As a further preferred embodiment of the present invention, an inner waterproof layer is further disposed on the inner liner, and when the tubular body is horizontally placed, the inner waterproof layer covers a surface of the inner liner having a height smaller than a predetermined height value. .

As a further preferred embodiment of the present invention, the bamboo composite integrated pipe gallery is further provided with an in-line supporting member, the supporting member is embedded in the inner portion of the pipe body, and includes a plurality of supporting units having the same structure, wherein:

Each support unit includes a load-bearing steel ring and a detachable frame assembly mounted within the load-bearing steel ring, including horizontal support beams each lying in a plane perpendicular to the axial direction of the pipe gallery, a vertical support column and a horizontal beam, wherein the horizontal support beam is horizontally disposed at a bottom of the load-bearing steel ring; the vertical support column includes two main support columns and a plurality of sub-support columns, the two main The support column is vertically arranged between the load-bearing steel ring and the horizontal support beam, and the distance L between the two main support columns is set to be ≥1.0 m; the horizontal beam is horizontally arranged on both sides of the load-bearing steel ring and located at Between the main support column and the load-bearing steel ring, the auxiliary support column is arranged between the upper and lower horizontal beams, thereby passing through the main support column, the auxiliary support column and the upper and lower horizontal beams or the main support column and the auxiliary support The column, the horizontal beam and the horizontal support beam constitute a compartment for arranging the pipe, the net distance b _{d of the} four faces of the compartment and the pipe to be arranged is set to ≥100 mm;

The plurality of support units are arranged along the axial direction of the pipe gallery, and the spacing L _d between adjacent two support units is set to ≤ 2 m, and the upper ends of the corresponding vertical support columns on the two support units Connected by connecting rods, the horizontal support beams on the two supporting units are provided with a bottom plate, and the bottom plate is provided with a drainage hole, and a space formed between the bottom wall and the inner wall of the pipe gallery is used for arranging the largest pipe diameter or the heaviest pipe. .

As a further preferred embodiment of the present invention, the load-bearing steel ring has a thickness of 10-20 mm and a width of 200-400 mm, which is connected by a plurality of curved components to each other through a curved connecting plate to have two open ends. An annular connecting member, the two open ends are connected by a fastener, and at least one of the curved connecting plates is provided with an elongated fastening hole.

As a further preferred embodiment of the present invention, the inner surface of the pipe body is provided with a circumferential groove matching the load-bearing steel ring, so that the load-bearing steel ring can be tightened and embedded in the circumferential groove to adhere to The inner surface of the tube.

As a further preferred embodiment of the present invention, two bottom pillars are disposed under the horizontal support beam, and a reinforcing beam is disposed between the bottom pillar and the horizontal support beam.

According to the above technical solution conceived by the present invention, since the nominal diameter of the pipe trunk body is set to be more than 2000 mm (for example, 3000 mm to 10000 mm), the composition and structure of each layer of the pipe body are controlled by the prior art. And optimize the materials used in each layer (especially the inner liner and the structural layer) and the corresponding preparation process, so that the bamboo composite integrated pipe gallery has the advantages of large diameter, no stress, and high strength, which is very suitable. It is used underground as a comprehensive pipe gallery and can effectively ensure the service life of the pipe gallery. According to the mechanical design model of the bamboo winding material, the invention formulates a bamboo winding material processing technology adapted to a large-diameter, stress-free pipe gallery, taking the intermediate structure layer as an example, by controlling the winding process (for example, the bamboo raft and the mesh cloth) The layers are entangled together, and the bamboo raft and the mesh cloth are structural layer resin which is added with a bio-based filler while being entangled; and the bamboo raft is also arranged in two ways, namely, an axial bamboo curtain and a circular bamboo raft. Curtain can further improve the strength), and select and modify the raw materials used in the layer structure (such as bamboo raft, mesh cloth, adhesive, such as structural layer resin, filler, etc.), so that the final The integrated pipe gallery has a large inner diameter, And no stress effect.

The stress-free bamboo composite pipe gallery of the present invention is a high-strength composite material whose rigidity and strength can withstand the required load, including the weight of the structure and equipment, the self-weight of the pipeline inside the pipe gallery, the earth pressure, the groundwater pressure and buoyancy, the vehicle load, And other ground dynamic loads; and need to meet the anti-cracking waterproof and seismic requirements. The design of the stress-free bamboo composite pipe gallery is 100 years, the structural important coefficient is 1.1, the seismic intensity is 7 degrees, the impermeability grade is P6, and the anti-corrosion grade is the highest level. It can be applied to the harsh underground environment and ensure the service life. .

[Description of the Drawings]

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a schematic view showing the structure of a stress-free bamboo composite pipe gallery of the present invention.

Figure 2 is a structural view of an in-line support member for a pipe gallery of the present invention;

Figure 3 is a schematic cross-sectional structural view of an in-line support member for a pipe gallery of the present invention;

Figure 4 is an assembled view of the in-line support member and the pipe gallery of the present invention;

Figure 5 is a schematic view showing the structure of a load bearing steel ring of the present invention.

【detailed description】

The present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It is understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention. Further, the technical features involved in the various embodiments of the present invention described below may be combined with each other as long as they do not constitute a conflict with each other.

Example 1

The stress-free bamboo composite pipe gallery in the present invention can be formed by mutual connection between a plurality of pipe bodies. As shown in FIG. 1 , any one pipe body includes an inner liner layer and a structure in order from the inside to the outside in the pipe diameter direction. Layer and outer protective layer;

The inner liner is obtained by curing a raw material including an inner liner resin and a bamboo fiber nonwoven fabric;

The structural layer is composed of structural layer resin, bamboo raft, bio-based filler, and mesh cloth. The raw material is obtained by curing; the structural layer is formed by winding the bamboo raft, and the bamboo raft is a structural layer resin which is added with a bio-based filler while being entangled, and the structural layer can be superposed by the bamboo raft and the mesh cloth. Wrapped, the bamboo raft and the mesh cloth are structural layer resin which is added with a bio-based filler while being entangled.

The inner and outer diameter dimensions of the bamboo composite composite pipe gallery without stress in the present invention can be controlled according to Table 1.

Table 1 Diameter and deviation of inner diameter of bamboo composite integrated pipe gallery (unit: mm)

The verticality of the end face of the pipe can be controlled according to Table 2.

Table 2 End face vertical deviation (unit: mm)

In the present embodiment, the total thickness of the inner liner of the pipe gallery can be 5±0.5mm, and the preparation method can be referred to the preparation of the inner liner layer in the bamboo-wound composite pipe, and can be wound by the bamboo fiber nonwoven fabric impregnated with the resin. The inner lining resin used for the inner liner layer may be a water-soluble resin, such as a modified urea-formaldehyde resin, an aqueous polyurethane resin, a polyester resin, a modified silicone; in order to make the inner liner layer have weather resistance, fire resistance, mechanical properties, As well as water resistance, for bamboo fiber nonwovens:

Bamboo fiber content: ≥98%;

Area density: 40 ~ 50g / m ² ;

Tensile breaking strength: longitudinal direction ≥ 120N; transverse direction ≥ 30N;

Water content: 8 to 15%;

Water soak rate (25 ° C): ≤ 12 s.

The structural layer can also be prepared by referring to the preparation of a structural layer (also referred to as a reinforcing layer) in a bamboo-wound composite pipe, that is, comprising a structural layer resin, bamboo raft, bio-based filler, and mesh cloth. The raw material is obtained by curing; the structural layer is formed by stacking bamboo rafts and mesh cloth, and the bamboo raft and the mesh cloth are structural layer resin which is added with a bio-based filler while being entangled.

The structural resin may be an amino resin, and a filler may be added to the resin. The matrix resin should also meet the requirements of Table 3 after curing.

Table 3 Performance requirements after curing of matrix resin

性能performance	要求Claim
冲击强度a_cu(悬臂梁法)KJ/m² Impact strength a _cu (cantilever method) KJ/m ²	≥50≥50
拉伸强度MPaTensile strength MPa	≥20≥20
巴氏硬度Barcol hardness	≥40≥40
吸水率％Water absorption rate%	≤0.5≤0.5

The filler contained in the matrix resin is a biomass powder, and the properties are to comply with the requirements of Table 4.

Table 4 filler performance requirements

性能performance	要求Claim
杂质含量％Impurity content%	≤2.0≤2.0
纤维素含量％Cellulose content%	≥40≥40
细度P(目)Fineness P (mesh)	60≤P≤8060≤P≤80

The bamboo raft can adopt the ring-shaped bamboo raft belt and the axial bamboo raft belt, that is, the bamboo raft can be woven into the bamboo quilt curtain first, that is, the plurality of bamboo rafters are connected by the knitting line to form a bamboo curtain, wherein each bamboo raft is in the bamboo. The crotch curtains are arranged in parallel at equal intervals, and the bamboo curtain comprises an axial bamboo curtain and a circular bamboo curtain, wherein the axial direction of the axial bamboo curtain is consistent with the width direction of the bamboo sheet therein. The length direction of the ring-to-bamboo curtain is consistent with the length of the bamboo raft in it, and requires:

The radial tensile strength of the bamboo rafters is 80±20 MPa; the bamboo fiber content is 40±5%; and the water content is 10±2%. Tensile strength: 1500±100N for the ring bamboo raft and 200±20N for the axial bamboo raft.

When the bamboo raft is wrapped, the mesh cloth should be wrapped. The performance of the mesh fabric should meet the following requirements:

Material: polyester polyester;

Center distance of the mesh: 4mm × 4mm (that is, the distance between the center of the longitudinal mesh is 4mm, and the distance from the center of the latitudinal mesh is 4mm);

Area density: 30 ~ 40g / m ² ;

Tensile breaking strength: longitudinal direction ≥ 200N; latitudinal direction ≥ 150N;

Elongation at break (latitude and longitude): ≤5%;

Acid and strong retention rate (warp and weft): ≥90%.

The outer protective layer can be obtained by coating a gel coat resin adhesive, or using a polyurethane or polyurea waterproof paint, etc., so that the outer anticorrosive material has anti-aging, medium resistance, waterproof, impact resistance and puncture performance, and can refer to the standard "polyurethane". Waterproof coatings GB/T 19250, "spray polyurea protective materials" HG/T 3831 provisions.

The bamboo-wound composite pipe gallery of the invention has good heat and fire resistance (see Table 5, according to the standard "Classification Standard for Combustion Performance of Building Materials" GB 8624) and impermeability (see Table 6).

Table 5 Burning grades of various parts of bamboo-wound composite pipe gallery

材料material	防火等级Fire-proof level
管廊Pipe gallery	B1B1
内部支撑Internal support	AA
附属结构Subsidiary structure	AA
外防护External protection	B1B1

Table 6 Impermeability grade and surface water absorption of bamboo-wound composite pipe gallery

管廊埋置深度H(m)Pipe gallery depth H (m)	抗渗等级Impermeability rating
H＜10H<10	P6 P6
10≤H＜2010≤H<20	P8P8
20≤H＜3020≤H<30	P10P10
H≥30H≥30	P12P12

The stiffness grade SN of the bamboo composite integrated pipe corridor of the invention is divided into 5000N/m ² , 8000N/m ² , 10000N/m ² , 15000N/m ² , 20000N/m ² , 25000N/m ² , 30000N/m ² , initial The ring stiffness S ₀ should be no less than the corresponding ring stiffness rating. The compressive strength f _cc should satisfy:

Buried depth H≤3m, should satisfy f _c ≥50MPa; buried depth 3m<H<5m, should satisfy f _c ≥60MPa; buried depth H≥5, should satisfy f _c ≥80MPa.

The impact strength a _{i of the} bamboo-wound composite pipe gallery material should satisfy: vertical lamination direction, a _i ≥35KJ/m ² ; parallel lamination direction, a _i ≥25KJ/m ² . Axial strength, such as the axial tensile strength of the pipe wall, as shown in Table 7, the axial tensile strain at break should be not less than 1.5% (Table 7 also shows the data of the hoop tensile strength).

Table 7 tensile strength minimum (in megapascals)

Flexibility, such as the bamboo-wound composite pipe joint deflection level A and the deflection level B, is based on a maximum deflection of 3% for long-term use after installation, as shown in Table 8, for example.

Table 8 Radial Deformation Rate and Requirements for Initial Flexibility

The hoop bending strength, that is, the hoop bending strength F _{tm of the} pipe wall should be calculated according to the engineering design.

In the present invention, the inner waterproof layer in the tube body may be located at the innermost layer of the bottom end of the pipe gallery (ie, on the surface of the inner liner layer, especially covering the surface of the inner liner layer below the preset height by a predetermined height, as shown in the figure. 1)), for waterproofing when draining, waterproof coating can be used; inner liner function: guaranteed inside The surface is smooth and flat, rich in resin, good in aging resistance, otherwise the bamboo raft is exposed, but also resistant to impact and external force; the outer protective layer function: should have anti-aging, medium resistance, waterproof, impact resistance and puncture performance, can be used Anti-corrosion coating.

As shown in FIG. 2 to FIG. 5, the pipe body can also be provided with an in-line support member, the support member comprises two support units of the same structure, wherein each support unit comprises a load-bearing steel ring 1 and a detachable type. The frame assembly, the load-bearing steel ring 1 is used for connecting other structures such as an internal pipe bracket to provide sufficient bearing capacity, and the load-bearing steel ring 1 can be fixed in any shape by bonding, riveting or the like to the pipe body. Inner surface, in the present embodiment, the load-bearing steel ring 1 is preferably a tensionable annular connecting member, which is directly fixed to the inner surface of the pipe body by tightening the annular connecting member, and no need to bond or Riveting, easy to install, and able to not damage the structure of the pipe.

The structure of the load-bearing steel ring 1 can be various, as long as the zoom can be achieved. One specific embodiment is shown in FIG. 4. FIG. 4 is a schematic structural view of a load-bearing steel ring according to an embodiment of the present invention, and the thickness thereof. b is 10-20mm, width is 200-400mm, so as to ensure long-term stable support of the inner pipe filled with medium on the support frame, which is connected by two curved components 1-1 and two through the curved connecting plate 1-2 The open bearing steel ring 1 has two open ends 1-3 at the opening, and the two open ends 1-3 are connected by fasteners such as a bolt and nut assembly, at least in the curved connecting plate 1-2 One is provided with elongated fastening holes 1-4. The curved assembly 1-1 and the curved connecting plate 1-2 are connected by fasteners such as bolts and nuts, and bolts or screws are passed through the elongated fastening provided on the curved connecting plate 1-2. Holes 1-4, when the fasteners of the open ends 1-3 are adjusted, bolts or screws or the like in the elongated fastening holes 1-4 can be moved in the elongated fastening holes 1-3 to achieve tension adjustment. . The total bearing capacity of each load-bearing steel ring 1 is less than or equal to 2000 kgf.

In order to reduce the thickness of the pipe wall so that the steel ring can also share a part of the ring stiffness, the load-bearing steel ring can be designed as a double-layer sandwich structure, that is, the steel ring section has an I-shaped structure, and the inner and outer two-layer steel ring and the intermediate steel The ribbed plate is assembled and welded. The thickness of the steel ring is 10-20 mm and the width is 200-400 mm. The thickness of the rib is 10-20 mm and the width is 50-100 mm. The structure can be used as both an internal frame connection structure and a pipe gallery reinforcement structure, which greatly improves the bearing performance of the pipe gallery. In order to improve the horizontal support The supporting strength of the supporting beam is provided with two bottom pillars 6 below the horizontal supporting beam 2, and a reinforcing beam is arranged between the bottom pillar 6 and the horizontal supporting beam 2.

In order to make the fixing method more reliable, in the embodiment, the inner surface of the pipe gallery tube is provided with a circumferential groove matching the bearing steel ring 1, so that the bearing steel ring 1 can be tightened and embedded in the circumferential concave The inside of the tank is thus attached to the inner surface of the tube. The load-bearing steel ring 1 is preferably directly installed after the pipe body is finished in the factory. After the installation, the pipe joint is made, and then the pipe joint is transported to the project site for pipe joint connection. After the connection is completed, the load-bearing steel ring 1 is connected to the inside such as the pipe. Other structures such as brackets.

In the present embodiment, the detachable frame assembly is installed in the load-bearing steel ring 1, which is assembled by the horizontal support beam 2, the vertical support column 3 and the horizontal beam 4, the horizontal support beam 2, the vertical support column 3 and the horizontal the cross member 4 are located in a plane perpendicular to the axial direction of the pipe rack, between the bolts and nuts connecting the beams, wherein the horizontal support beams 2 arranged horizontally, and at a distance from the bottom of the bearing steel ring positions. 1 h _k, h _k from the inside of the Pipe arrangement design (based on space considerations) and rainwater displacement determination; vertical support column 3 includes two main support columns 3-1 and several sub-support columns 3-2, two main support columns 3-1 are vertically arranged Between the load-bearing steel ring 1 and the horizontal support beam 2, the space between the two main support columns 3-1 serves as an access passage, and the distance between the two is ≥ 1.0 m, thereby facilitating the maintenance of the inside of the pipe gallery and When the pipelines inside the pipe gallery are transported, when the inspection vehicle or the transport vehicle is required for maintenance and pipeline transportation, the distance L needs to be ≥2.2m; the horizontal beam 4 is horizontally arranged on both sides of the load-bearing steel ring 1 and located at the main support column 3 Between the -1 and the load-bearing steel ring 1, a sub-support column 3-2 is disposed between the upper and lower horizontal beams 4, Thus, the main support column 3-1, the sub-support column 3-2 and the upper and lower horizontal beams 4 form a compartment for arranging the pipeline or the main support column 3-1, the sub-support column 3-2, the horizontal beam 4 and the horizontal support beam 2 constitutes a compartment for arranging the pipeline, and each compartment is located on both sides of the pipe trunk body, and the net distance b _d ≥ 100 mm of the four faces of the compartment and the pipe to be arranged is ensured that there is sufficient The space accommodates pipe compensators, pressure valves and other accessories, and can be connected to internal pipes. Each detachable frame assembly has a bearing capacity of 500 kgf or less.

Specifically, a plurality of supporting units are arranged along the axial direction of the pipe gallery, and a distance L _d between adjacent two supporting units is _≤ 2 m, thereby ensuring that the bearing capacity of each supporting unit does not exceed the maximum that can be withstood Carrying capacity to ensure safety. The upper ends of the corresponding vertical support columns 3 on two adjacent support units are connected by a connecting rod to ensure the connection strength between the support units, between the upper ends of the two vertical support columns 3 on the single support unit A connecting rod is provided to ensure the support strength of the support column.

In the embodiment, the horizontal support beam 2 on the two adjacent support units is provided with a bottom plate 5, and the bottom plate 5 is provided with a drainage hole, and a space formed between the bottom plate 5 and the inner wall of the pipe gallery can serve as a drainage channel, and Can be used to arrange the largest pipe diameter or the heaviest pipe, and the drainage channel below the bottom plate can make full use of the pipe space, so that the pipe gallery has the function of timely drainage, and the largest pipe diameter or the heaviest pipe is arranged at the bottom, which can be reduced The requirement for the overall support strength of the support member. The inner surface of the pipe below the bottom plate 5 is provided with a waterproof layer made of a waterproof material. The waterproof material of the waterproof layer may be one selected from the group consisting of an unsaturated polyester resin, a polyurea resin, a polyester resin, a polyurethane resin, an epoxy resin, an asphalt, and a waterproof roll.

In the present invention, the bamboo composite integrated pipe gallery can be formed by interconnecting a plurality of pipe bodies, and the length of the single pipe body can be set to 3 to 8 meters. The inner surface of the bamboo compound pipe should be smooth and flat, without cracks, delamination, impurities, gel-in areas, bubbles, etc.; the pipe ends should be flush; the edges should be free of burrs; the outer surface has no obvious defects. .

Those skilled in the art will appreciate that the above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and scope of the present invention, All should be included in the scope of protection of the present invention.

Claims

The utility model relates to a bamboo composite integrated pipe gallery, characterized in that the pipe gallery comprises a pipe body, and the pipe body comprises an inner lining layer, a structural layer and an outer protective layer in order from the inside to the outside in the pipe diameter direction; wherein

The inner liner layer is obtained by curing a raw material including an inner liner resin and a bamboo fiber nonwoven fabric;

The structural layer is obtained by curing a raw material including a structural layer resin, a bamboo raft, and a bio-based filler; the structural layer is formed by winding the bamboo raft, and the bamboo raft is added while being entangled. The structural layer resin having the bio-based filler;

Further, the inner diameter of the pipe body is not less than 2000 mm, and the rigidity level is at least 5000 N/m 2 .
The bamboo composite integrated pipe gallery according to claim 1, wherein, for the inner liner layer, the bamboo fiber nonwoven fabric satisfies: bamboo fiber content: ≥98%; surface density: 40-50 g/m 2 ; Tensile breaking strength: longitudinal ≥ 120N; transverse ≥ 30N; water content: 8 ~ 15%; water soaking rate at 25 ° C: ≤ 12s;

For the structural layer,

The structural layer resin satisfies the post-cure: impact strength a cu ≥ 50KJ / m 2 ; tensile strength ≥ 20MPa; Barcol hardness ≥ 50HBa; water absorption ≤ 0.5%;

The bio-based filler has a particle size of from 60 mesh to 80 mesh.
The bamboo composite integrated pipe gallery according to claim 1, wherein said raw material in said structural layer further comprises a mesh cloth wrapped around said bamboo raft; said mesh cloth satisfies : areal density: 30 ~ 40g / m 2 ; tensile breaking strength: longitudinal ≥ 200N; latitudinal ≥ 150N; elongation at break: ≤ 5%; acid retention rate: ≥ 90%.
The bamboo composite integrated pipe gallery according to claim 1, wherein, for the structural layer, the bamboo raft meets: a radial tensile strength of 60 MPa to 100 MPa; a bamboo fiber content of 35% to 45%; and a water content. 8% to 12%;

Preferably, the bamboo raft is a bamboo curtain, and the bamboo curtain is connected by a plurality of bamboo rafts through a knitting line. Forming, wherein each of the bamboo rafters is arranged in parallel at equal intervals in the width direction of the bamboo raft, and the bamboo drapes comprises an axial bamboo drapes and a circular bamboo curtain, wherein the axial direction of the axial bamboo drapes and The bamboo rafts have the same width direction, and the length direction of the ring-shaped bamboo drapes coincides with the longitudinal direction of the bamboo rafts; in addition, the tensile strength of the circumferential bamboo rafts is 1400N-1600N, and the axial bamboo rafts The tensile strength of the belt is 180N to 220N.
The bamboo composite integrated pipe gallery according to claim 1, wherein said inner liner has a thickness of 4.5 mm to 5.5 mm.
The bamboo composite integrated pipe gallery according to claim 1, wherein an inner waterproof layer is further disposed on the inner liner, and when the tubular body is horizontally placed, the inner waterproof layer covers a height less than a preset height. The surface of the inner liner.
The bamboo composite integrated pipe gallery according to claim 1, wherein the bamboo composite integrated pipe gallery is further provided with an in-line supporting member, and the supporting member is embedded in the inner portion of the pipe body, and includes a plurality of structures Support unit, where:

Each support unit includes a load-bearing steel ring and a detachable frame assembly mounted within the load-bearing steel ring, including horizontal support beams each lying in a plane perpendicular to the axial direction of the pipe gallery, a vertical support column and a horizontal beam, wherein the horizontal support beam is horizontally disposed at a bottom of the load-bearing steel ring; the vertical support column includes two main support columns and a plurality of sub-support columns, the two main The support column is vertically arranged between the load-bearing steel ring and the horizontal support beam, and the distance L between the two main support columns is set to be ≥1.0 m; the horizontal beam is horizontally arranged on both sides of the load-bearing steel ring and located at Between the main support column and the load-bearing steel ring, the auxiliary support column is arranged between the upper and lower horizontal beams, thereby passing through the main support column, the auxiliary support column and the upper and lower horizontal beams or the main support column and the auxiliary support The column, the horizontal beam and the horizontal support beam constitute a compartment for arranging the pipe, the net distance b d of the four faces of the compartment and the pipe to be arranged is set to ≥100 mm;

The plurality of support units are arranged along the axial direction of the pipe gallery, and the spacing L d between adjacent two support units is set to ≤ 2 m, and the upper ends of the corresponding vertical support columns on the two support units Connected by connecting rods, the horizontal support beams on the two supporting units are provided with a bottom plate, and the bottom plate is provided with a drainage hole, and a space formed between the bottom wall and the inner wall of the pipe gallery is used for arranging the largest pipe diameter or the heaviest pipe. .
The bamboo composite integrated pipe gallery according to claim 7, wherein the load-bearing steel ring has a thickness of 10 to 20 mm and a width of 200 to 400 mm, which is formed by connecting a plurality of curved components to each other through a curved connecting plate. An expandable annular connecting member having two open ends, the two open ends being connected by fasteners, at least one of which is provided with an elongated fastening hole.
The bamboo composite integrated pipe gallery according to claim 8, wherein the inner surface of the pipe body is provided with a circumferential groove matching the load-bearing steel ring, so that the load-bearing steel ring can be tightened and embedded in The annular groove is attached to the inner surface of the tube.
The bamboo composite integrated pipe gallery according to claim 9, wherein two bottom pillars are disposed under the horizontal support beam, and a reinforcing beam is disposed between the bottom pillar and the horizontal support beam.