A support structure for slope support and its support system

Abstract

The present invention provides a support structure for slope support and its support system, including a support structure, a longitudinal tie beam, a support structure, and a slope; the support structure is composed of support inclined columns, arch ribs, web members, and support foundations, wherein one end of the support inclined column is fixedly connected to the support foundation, and the other end is fixedly connected to the longitudinal tie beam of the support structure on the side of the slope; a longitudinal tie beam is built on the top of the support foundation; three longitudinal tie beams are built on the support structure; arch ribs extend from the support inclined columns, and the distance from the arch ribs to the support foundation is one-third of the length of the support inclined columns. The other end of the arch ribs is connected to the lowermost longitudinal tie beam on the support structure, and web members are hinged between the arch ribs and the support inclined columns; composite waterproof coating layers are applied to the embedded steel plates, spherical shells, and spherical hinges at the joints between the support inclined columns, arch ribs, and web members.

Description

Technical Field

[0001] The present invention relates to the field of construction, and particularly to a support structure for slope support and its support system. Background Art

[0002] When new or expanded road projects and other construction projects are carried out, a large number of slope excavation and support problems are often involved. Currently, the commonly used slope support methods mainly include: gravity retaining wall, counterfort retaining wall, cantilever support, slab rib or lattice type anchor (cable) retaining wall support, row pile type anchor (cable) retaining wall support, etc. However, due to the influence of on-site construction environment, technology, and other factors such as the prestress loss of long-term anchor (cable), the slope support is insufficient and the slope deformation is relatively large. In addition, for some high and steep slope sections of roads, the vertical high slopes will cause an obvious sense of oppression to the people in the vehicles driving on the road, the driving comfort is not enough, and the driving safety is affected.

[0003] The waterproof measure of the steel components of the slope support support system is an important factor affecting the quality and service life of the support project. Chlorinated paraffin is a chlorinated derivative of paraffin hydrocarbons, which has the advantages of low volatility, flame retardancy, good barrier property, low price, etc. It can be used as additives such as plasticizers, flame retardants, waterproof agents, and oil-resistant additives, and has been widely used in anti-corrosion and wear-resistant coatings (CN105602356B and CN 102286238B), achieving good waterproof and anti-corrosion effects. However, this direct addition method will cause insufficient compatibility between chlorinated paraffin and epoxy coating components. Over time, the uncrosslinked chlorinated paraffin will migrate to the coating surface, resulting in a deterioration of the waterproof and anti-corrosion effects of the coating, affecting the waterproof performance of the epoxy coating layer, and further affecting the service life of the metal components and the safety of the support system. Summary of the Invention

[0004] The purpose of the present invention is to provide a support structure for slope support and its support system in view of the defects and deficiencies of the prior art, effectively strengthening the support capacity of the existing slope reinforcement, reducing the excessive deformation of the slope caused by insufficient support, improving the sense of oppression of the high and steep slopes on the people in the vehicles driving on the road, enhancing the driving comfort, and at the same time, using fluorinated chlorinated paraffin-modified epoxy resin, effectively improving the service life of the slope support support system.

[0005] To achieve the above object, the technical solution adopted by the present invention is: a support structure and its support system for slope support, including a support structure, a longitudinal tie beam, a support structure, and a slope; the support structure is composed of support inclined columns, arch ribs, web members, and a support foundation, wherein the support inclined columns are reinforced concrete column structures, one end of the support inclined column is fixedly connected to the support foundation, and the other end is fixedly connected to the longitudinal tie beam of the support structure on the side of the slope; the minimum distance between the support foundation and the slope surface on the side of the slope is 8-20m, a longitudinal tie beam is built on the top of the support foundation, the side of the longitudinal tie beam is fixedly connected to the end face of the support inclined column, and steel bars extend from both end faces of the support inclined column and are buried in the longitudinal tie beams at both ends; the support structure is a reinforced concrete retaining and slope protection structure built on the side of the slope, and three longitudinal tie beams are built on the support structure, wherein the uppermost longitudinal tie beam is fixedly connected to the support inclined column; an arch rib extends from the support inclined column, the distance from the arch rib to the support foundation is one-third of the length of the support inclined column, the other end of the arch rib is connected to the lowermost longitudinal tie beam on the support structure, and a web member is built between the arch rib and the support inclined column; both the support inclined column and the arch rib are embedded with a grooved support inclined column embedded steel plate through anchor bars at the connection with the web member, and a spherical shell is installed on the support inclined column embedded steel plate; the spherical shell is divided into an upper spherical shell and a lower spherical shell, a grooved sliding box is welded and connected to the support inclined column embedded steel plate, a circle of clamping edges protrude from the edge of the sliding box, the upper spherical shell is clamped in the clamping edges, and a cavity is arranged inside the upper spherical shell, the lower spherical shell is arranged in the cavity, a spherical socket cavity is formed between the upper spherical shell and the lower spherical shell, and tetrafluoroethylene sliding plates are arranged between the upper spherical shell and the clamping edges of the sliding box and between the upper spherical shell and the lower spherical shell; a spherical hinge is arranged in the spherical socket between the upper spherical shell and the lower spherical shell, the spherical hinge extends out 1-3 limb segments, and the ends of the limb segments are welded and connected to the web member embedded steel plate embedded at the end of the web member; a composite waterproof coating layer is applied to the outside of the embedded steel plates, spherical shells, and spherical hinges at the connections between the support inclined column, arch rib, and web member, the composite waterproof coating layer is composed of two 2mm epoxy coating layers stacked in sequence, and the composite waterproof coating layer is extended and applied from the edge of the embedded steel plate to the concrete member by not less than 15mm.

[0006] Further, the longitudinal spacing between the support structures is 8-15m.

[0007] Further, a rigid shed cover structure is installed on the top surface of the support structure through chemical bolts.

[0008] Further, for the epoxy coating layer of the composite waterproof coating layer, the epoxy coating is composed of epoxy resin, polyamide resin, barium sulfate, iron oxide, nano-zinc oxide, butyl acetate, and butanol; the epoxy resin has the structure shown in formula (I):

[0009]

[0010] Among them, in formula (I), R is a chlorinated paraffin 52 chain segment.

[0011] Preparation method of fluorinated chlorinated paraffin 52 epoxy resin, comprising the following steps:

[0012] Step (1): Dissolve chlorinated paraffin 52 in methyl ethyl ketone, add a certain amount of p-hydroxybenzoic acid and potassium carbonate, and react at 85 °C for 9 h under nitrogen protection to obtain chlorinated paraffin 52 containing carboxyl groups;

[0013] Step (2): Add the chlorinated paraffin 52 containing carboxyl groups obtained in step (1) and an appropriate amount of 2,2-bis(trifluoromethyl)oxirane to a reaction kettle, and react at 90 °C for 7 h to obtain chlorinated paraffin 52 containing hydroxyl groups;

[0014] Step (3): Add the chlorinated paraffin 52 containing hydroxyl groups obtained in step (2) and trimellitic anhydride to a reaction kettle, and react at 75 °C for 8 h to obtain chlorinated paraffin 52 diacid;

[0015] Step (4): Add the chlorinated paraffin 52 diacid prepared in step (3) and epichlorohydrin to a reaction kettle, then add an appropriate amount of catalyst cetyltrimethylammonium bromide, first heat to 90 °C under stirring and react for 4 h, then cool to room temperature, dropwise add an appropriate amount of 45% NaOH solution, and continue stirring and reacting for 7 h to obtain fluorinated chlorinated paraffin 52 epoxy resin.

[0016] The beneficial effects of the present invention are: effectively strengthening the support capacity of the existing slope reinforcement, reducing the excessive deformation of the slope caused by insufficient support, improving the sense of oppression of the high-steep slope on the personnel in the vehicle driving on the road, improving the driving comfort. At the same time, using the epoxy resin modified with fluorinated chlorinated paraffin effectively improves the service life of the slope support system. Description of the Drawings

[0017] The drawings described herein are used to provide a further understanding of the present invention, form a part of this application, but do not constitute a limitation to the present invention.

[0018] Figure 1 It is a schematic diagram of the support structure, Figure 2 It is a schematic diagram of the slope support structure, Figure 3 It is an enlarged schematic diagram of part A, Figure 4 It is a schematic diagram of the consolidation connection structure, Figure 5 It is an infrared diagram of the prepared fluorinated chlorinated paraffin 52 epoxy resin.

[0019] Among them: 1 is the support structure, 11 is the support inclined column, 111 is the embedded steel plate of the support inclined column, 112 is the spherical shell, 113 is the spherical hinge, 114 is the composite waterproof coating layer, 12 is the arch rib, 13 is the web member, 131 is the embedded steel plate of the web member, 14 is the support foundation, 2 is the longitudinal tie beam, 3 is the support structure, and 4 is the slope. Specific implementation manner

[0020] In combination with the accompanying drawings, the present invention will be further described in detail.

[0021] As shown in the figure, a support structure and a support system for slope support include a support structure 1, a longitudinal tie beam 2, a support structure 3, and a slope 4; the support structure 1 is composed of a support inclined column 11, an arch rib 12, a web member 13, and a support foundation 14, wherein the support inclined column 11 is a reinforced concrete column structure, one end of the support inclined column 11 is fixedly connected to the support foundation 14, and the other end is fixedly connected to the longitudinal tie beam 2 of the support structure 3 on the side of the slope 4; the minimum distance between the support foundation 14 and the slope surface on the side of the slope 4 is 8-20m, and a longitudinal tie beam 2 is built on the top of the support foundation 14. 2 side faces are fixedly connected to the end faces of the supporting oblique columns 11, and the end faces of both ends of the supporting oblique columns 11 are provided with steel bars extending out and embedded in the longitudinal tie beams 2 at both ends; the supporting structure 3 is a reinforced concrete retaining and slope protection structure built on the side of the slope 4, and three longitudinal tie beams 2 are built on the supporting structure 3, wherein the uppermost longitudinal tie beam 2 is fixedly connected to the supporting oblique columns 11; an arch rib 12 extends from the supporting oblique columns 11, and the distance from the arch rib 12 to the supporting foundation 14 is one third of the length of the supporting oblique columns 11, and the other end of the arch rib 12 is connected to the lowest longitudinal tie beam 2 on the supporting structure 3, and the arch rib 12 is connected to the supporting foundation 14. A web member 13 is built between the supporting oblique columns 11; the supporting oblique columns 11 and the arch ribs 12 are both embedded with a groove-shaped supporting oblique column embedded steel plate 111 through anchor bars at the connection with the web member 13, and a spherical shell 112 is installed on the supporting oblique column embedded steel plate 111; the spherical shell 112 is divided into an upper spherical shell and a lower spherical shell, and a groove-shaped sliding box is welded and connected to the supporting oblique column embedded steel plate 111, and a circle of card edges protrudes from the edge of the sliding box, and the upper spherical shell is clamped in the card edge, and a cavity is provided inside the upper spherical shell, and the lower spherical shell is installed in the cavity, and a ball socket cavity is formed between the upper spherical shell and the lower spherical shell, and there is a gap between the upper spherical shell and the card edge of the sliding box, and between the upper spherical shell and the card edge of the sliding box. A polytetrafluoroethylene slide plate is provided between the upper and lower spherical shells; a ball joint 113 is installed in the ball socket between the upper and lower spherical shells, and the ball joint 113 extends 1-3 limbs, and the end of the limb is welded and connected to the web embedded steel plate 131 embedded in the end of the web 13; the embedded steel plate between the supporting inclined column 11, the arch rib 12 and the web 13 connection, the ball shell 112, and the ball joint 113 are all coated with a composite waterproof coating layer 114, and the composite waterproof coating layer 114 is formed by two layers of 2mm epoxy coating layers stacked in sequence, and the composite waterproof coating layer 114 extends from the edge of the embedded steel plate to the concrete member for not less than 15mm.

[0022] In a specific implementation, the longitudinal distance between the supporting structures 1 is 8-15m.

[0023] During specific implementation, a rigid canopy cover structure is installed on the top surface of the support structure 1 through chemical bolts.

[0024] In another embodiment, the connection between the web member 13 and the supporting inclined column 11 and the arch rib 12 adopts a fixed connection form. At this time, the web member 13 is fixedly connected to the supporting inclined column 11 and the arch rib 12. The layout form of the web member 13 divides the space between the arch rib 12, the supporting inclined rod 11 and the supporting structure 3 into six triangular spaces. The connection nodes of the web member 13 on the side facing the supporting structure 3 are fixedly connected to the longitudinal tie beam 2. The supporting inclined column 11, the arch rib 12 and the web member 13 are integrally cast. Compared with the hinged connection form, the construction period of the fixed connection form is longer, the connection between the web member 13 and the supporting inclined column 11 and the arch rib 12 is more stable, and the static load capacity is stronger.

[0025] Preparation and testing of epoxy resin waterproof coating:

[0026] Mix epoxy resin, polyamide resin, barium sulfate, iron oxide, nano-zinc oxide, chlorinated paraffin, butyl acetate and butanol according to the weight parts of the raw materials in Table 1, stir evenly, disperse at high speed and grind to a fineness of less than 30um to obtain an epoxy waterproof and anticorrosive coating. Then test the adhesion, flexibility, acid resistance and alkali resistance of the epoxy coating, and the test results are shown in Table 2.

[0027] Table 1 Formula of epoxy waterproof and anticorrosive coating

[0028]

[0029] Table 2 Performance effects of epoxy resin waterproof and anticorrosive coating:

[0030]

[0031] Obviously, introducing hydrophobic fluorine atoms into chlorinated paraffin effectively improves the water and corrosion resistance of chlorinated paraffin, and introducing it into the epoxy resin molecular chain as a side chain can not only improve the compatibility of chlorinated paraffin with the coating composition, but also participate in the curing cross-linking reaction, improve the stability and persistence of chlorinated paraffin in the cross-linked network, and effectively increase the compatibility of chlorinated paraffin with the epoxy coating layer.

[0032] In summary, the support system formed by the supporting inclined column 11, the web member 13 and the arch rib 12 of the present invention effectively strengthens the support capacity of the existing slope reinforcement, reduces the excessive deformation of the slope caused by insufficient support, improves the sense of oppression of the high and steep slope on the personnel in the vehicle driving on the road, improves the driving comfort. At the same time, using fluorinated chlorinated paraffin-modified epoxy resin enhances the waterproof performance of the metal components of the slope support system, extends the service life and reduces the maintenance cost.

Claims

1. A support structure for slope support and its support system, characterized in that: It includes a support structure, longitudinal tie beams, a support structure, and a slope; the support structure consists of support inclined columns, arch ribs, web members, and support foundations. Among them, the support inclined columns are reinforced concrete column structures. One end of the support inclined column is fixedly connected to the support foundation, and the other end is fixedly connected to the longitudinal tie beam of the support structure on the side of the slope. The minimum distance between the support foundation and the slope surface on the side of the slope is 8 - 20 m. A longitudinal tie beam is built on the top of the support foundation. The side of the longitudinal tie beam is fixedly connected to the end face of the support inclined column, and steel bars extend out from both end faces of the support inclined column and are embedded in the longitudinal tie beams at both ends. The support structure is a reinforced concrete retaining and slope protection structure built on the side of the slope. Three longitudinal tie beams are built on this support structure. The uppermost longitudinal tie beam is fixedly connected to the support inclined column. An arch rib extends from the support inclined column. The distance from the arch rib to the support foundation is one-third of the length of the support inclined column. The other end of the arch rib is connected to the lowermost longitudinal tie beam on the support structure. And a web member is built between the arch rib and the support inclined column. At the connection of the support inclined column and the arch rib with the web member, a channel-shaped support inclined column embedded steel plate is buried through anchor bars. A spherical shell is installed on the support inclined column embedded steel plate. The spherical shell is divided into an upper spherical shell and a lower spherical shell. A channel-shaped sliding box is welded and connected to the support inclined column embedded steel plate. A circle of clamping edges protrude from the edge of the sliding box. The upper spherical shell is clamped inside the clamping edges. And a cavity is arranged inside the upper spherical shell. The lower spherical shell is installed inside the cavity. A spherical socket cavity is formed between the upper spherical shell and the lower spherical shell. And tetrafluoroethylene sliding plates are arranged between the clamping edges of the upper spherical shell and the sliding box, and between the upper spherical shell and the lower spherical shell. A spherical hinge is installed in the spherical socket between the upper spherical shell and the lower spherical shell. The spherical hinge extends 1 - 3 limb segments. The end of the limb segment is welded and connected to the web member embedded steel plate embedded at the end of the web member. A composite waterproof coating layer is applied outside the embedded steel plates, spherical shells, and spherical hinges at the connections between the support inclined columns, arch ribs, and web members. The composite waterproof coating layer is composed of two 2-mm epoxy coating layers laminated in sequence. And the composite waterproof coating layer is extended and applied from the edge of the embedded steel plate to the concrete member by not less than 15 mm.

2. The support structure and its support system for slope support according to claim 1, characterized in that: The longitudinal spacing between the support structures is 8 - 15 m.

3. The support structure for slope support and its support system according to claim 1, characterized in that: A rigid shed cover structure is installed on the top surface of the support structure through chemical bolts.

4. A support structure and its support system for slope support according to claim 1, characterized in that: For the epoxy coating layer of the composite waterproof coating layer, the epoxy coating consists of epoxy resin, polyamide resin, barium sulfate, nano-calcium carbonate, butyl acetate, and isopropanol. The epoxy resin has the structure shown in formula (I): Among them, in formula (I), R is a chlorinated paraffin 52 chain segment.

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