Slideway device for push-out section of final joint of immersed tube

Abstract

The utility model relates to an immersed tube final joint push-out section slideway device, which comprises a plurality of slide rails arranged on a top steel plate of an expansion section bottom plate, each slide rail comprises a transverse slide rail and a longitudinal slide rail, an inflatable waterstop is arranged between the transverse slide rail and the longitudinal slide rail, each of the transverse slide rail and the longitudinal slide rail comprises a steel base plate, a slide plate and an anti-shearing barrier strip, the shear-resistant barrier strips are welded to the top of the steel base plate and divided into a plurality of square frames, and the sliding plates are embedded in the square frames and fixedly connected with the steel base plate through bolts. The overall tensile strength, the compression resistance, the shear resistance and the abrasive resistance are greatly improved, the lubricating effect is better, the adaptability to a main body structure is high, the sliding way cannot be damaged in the sliding process of the main body structure, the risk that sliding fails due to the fact that sliding way broken objects intrude into the main body structure is avoided, and the overall reliability of a system is greatly improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of waterway engineering and tunnel engineering, especially relates to a pipe jacking final joint push-out section slide device. BACKGROUND

[0002] The underwater pipe jacking tunnel push-out section final joint has the characteristics of large size, large weight and poor surface flatness. As the structural form of the pipe jacking tunnel final joint, it needs to be pushed out and pulled back multiple times on land and underwater. In order to reduce the friction between the push-out section and the pipe section, a slide needs to be set between the push-out section and the pipe section. Due to the narrow space between the pipe section and the push-out section, the size and number of the slide are limited. At the same time, the slide needs to support the push-out section and reduce friction in different environments on land and underwater, and needs to overcome the adverse effects of large load changes, seawater corrosion and aquatic organism attachment. For a steel structure pipe jacking tunnel applied in a 30-meter underwater deep sea environment, the existing slide structure has the following problems:

[0003] (1) The slide plate on the slide has a relatively low hardness and deforms greatly under the self-weight load of nearly 2000 tons of the push-out section, which easily leads to damage of other structures of the slide. For example, the slide plate of the slide rail is too thin in material thickness, and after being subjected to shear force, it is irreversibly damaged, such as edge curling and bolt breakage. These damages only cause slight damage, such as leakage, to the concrete structure pipe jacking, which can be compensated by plugging materials. However, the surface of the steel pipe jacking structure is coated with heavy-duty corrosion-resistant materials, and the damaged fragments of the slide rail may irreversibly damage the corrosion-resistant coating during repeated pushing and pulling, and the location is irreparable, which may cause rust and seriously endanger the service life of the pipe jacking structure;

[0004] (2) The polytetrafluoroethylene slide plate will change brittlely in a high-temperature state, which is not suitable for the construction process requirements of the steel structure pipe jacking tunnel, and the polytetrafluoroethylene slide plate deforms greatly, and needs to be replaced after about one pushing and pulling, which does not meet the construction requirements;

[0005] (3) The fixing measures of the slide plate on the slide are ineffective, which leads to damage of the slide plate and other structures of the slide due to deformation of the slide plate during sliding, and the broken fragments easily enter the gaps of the slide, leading to continuous increase of the damaged area of the slide and chain damage, which increases the friction and the difficulty of pushing and pulling;

[0006] (4) Due to the multiple reasons of large deformation of the slide plate, poor flatness of the push-out section and damage of the slide, the actual pushing and pulling force is greater than the theoretical friction force that needs to be overcome, the hydraulic system for pushing and pulling needs to be designed with a high rich coefficient, which leads to large selection of the hydraulic system. SUMMARY

[0007] The utility model aims at solving prior art's insufficient, and provides a pipe jacking final joint push-out section slide device.

[0008] In order to achieve the above object, the utility model discloses the following technical scheme: a pipe jacking final joint push-out section slide device, including several arrangements on the slide rail of expansion section bottom plate top steel sheet, every slide rail includes horizontal slide rail and longitudinal slide rail, and the horizontal slide rail and longitudinal slide rail are arranged with inflatable waterstop between, and the horizontal slide rail and longitudinal slide rail all include steel backing plate, slide plate, shear baffle, several shear baffles are welded on the top of steel backing plate and divide several square boxes, and the slide plate is embedded in the square box and is connected and fixed with steel backing plate through bolt;

[0009] Expansion section bottom plate top steel sheet top welding has with the steel backing plate four side edges corresponding leveling base frame of horizontal slide rail, this steel backing plate is placed in leveling base frame, and the gap between this steel backing plate and expansion section bottom plate top steel sheet is filled with first leveling base;Expansion section bottom plate top steel sheet top welding has with the steel backing plate wide side edge corresponding leveling base stop of longitudinal slide rail, and with long side edge corresponding grouting baffle, this steel backing plate is placed in leveling base stop and grouting baffle, and the gap between this steel backing plate and expansion section bottom plate top steel sheet and the gap between grouting baffle is filled with second leveling base;

[0010] The steel backing plate of horizontal slide rail two wide side edges and the steel backing plate of longitudinal slide rail two long side edges are respectively welded with several lug plates, and the expansion section bottom plate top steel sheet top welding has several corresponding shear stop frame of lug plate, and the expansion section bottom plate top steel sheet top welding has the positioning plate in shear stop frame, and the lug plate is placed in shear stop frame and is connected and fixed with positioning plate through leveling bolt, and the gap between lug plate and shear stop frame inner wall is inserted with wedge.

[0011] Particularly, the number of slide rails is four, and two are located at the two side edges of the pipe jacking, and the other two are located at the two sides of the center line of the pipe jacking.

[0012] Particularly, the first leveling base is a cement-based grouting material base or an epoxy resin base.

[0013] Particularly, the second leveling base is an epoxy resin base.

[0014] Particularly, the shear stop frame is U-shaped, and the shear stop frame has a reinforcing plate on both sides.

[0015] The utility model has the advantages that the utility model solves the reliability problem of the slide under the conditions of large load of the pipe jacking tunnel push-out section final joint, complex and changeable working conditions.

[0016] The overall tensile, compressive, shear and wear resistance of the whole is greatly improved, the lubrication effect is better, and the adaptability to the main structure is strong; the slide way will not be damaged during the sliding process of the main structure, thereby avoiding the risk of sliding failure caused by the invasion of the slide way broken into the main structure, and greatly improving the overall reliability of the system; the slide way is composed of relatively independent slide plates, the use frequency is increased, the local wear does not affect the use, and meanwhile the specification of the hydraulic system for pushing and pulling can be reduced, thereby reducing the system cost; the vertical bearing capacity of the slide rail is improved, the friction is reduced, and the slide rail can well adapt to the deformation demand of the immersed tube, the severe change of temperature and repeated use. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is a sliding rail arrangement plane schematic view of the utility model;

[0018] Figure 2 It is a Figure 1 A-A sectional view schematic view in the middle;

[0019] Figure 3 It is a Figure 1 B-B sectional view schematic view in the middle;

[0020] Figure 4 It is a single slide rail sectional view schematic view of the utility model;

[0021] Figure 5 It is a single slide rail plane schematic view of the utility model;

[0022] Figure 6 It is a longitudinal slide rail transverse sectional view schematic view of the utility model;

[0023] Figure 7 It is an ear plate and shear resisting frame connection schematic view of the utility model;

[0024] Figure 8 It is a transverse slide rail transverse sectional view schematic view of the utility model;

[0025] Figure 9 It is a push-out segment before pushing-out schematic view of the utility model;

[0026] Figure 10 It is a push-out segment after pushing-out schematic view of the utility model;

[0027] In the drawing: 1 - enlarged segment bottom plate top steel plate; 2 - transverse slide rail; 3 - longitudinal slide rail; 4 - inflatable water stop belt; 5 - steel backing plate; 6 - slide plate; 7 - shear resisting bar; 8 - leveling base frame; 9 - first leveling base; 10 - leveling base stop edge; 11 - grouting baffle; 12 - second leveling base; 13 - ear plate; 14 - shear resisting frame; 15 - positioning plate; 16 - wedge block;

[0028] The embodiments of the utility model will be described in detail below with reference to the drawings. DETAILED DESCRIPTION

[0029] The utility model will be further explained in connection with the drawings and embodiments:

[0030] As Figures 1-10 The utility model discloses a pipe jacking final joint push-out section slide device, including several slide rails arranged on the expansion section bottom plate top steel sheet 1, each slide rail includes horizontal slide rail 2 and longitudinal slide rail 3, and inflatable waterstop 4 is arranged between horizontal slide rail 2 and longitudinal slide rail 3, horizontal slide rail 2 and longitudinal slide rail 3 all include steel backing plate 5, slide plate 6, shear baffle 7, slide plate 6 is MGB high polymer plastic alloy slide plate, and several shear baffles 7 are welded on the top of steel backing plate 5 and divide several square boxes, and slide plate 6 is embedded in the square box and is connected and fixed with steel backing plate 5 through bolt, specifically, the bottom between the expansion section and the push-out section of pipe jacking has 100mm gap, and four slide rails are arranged along the pipe jacking cross section direction in narrow space, two are located at the two side edges of pipe jacking, and two are located at the two sides of pipe jacking center line, and the limiting block made of the same material is arranged in the 100mm gap of the left and right sides of expansion section inner wall. Ensure that the push-out section does not collide with the expansion section during the push-out process.

[0031] Expansion section bottom plate top steel sheet 1 top welding has with the four side edges of horizontal slide rail 2's steel backing plate 5 corresponding leveling base frame 8, this steel backing plate 5 is placed in leveling base frame 8, and the gap between this steel backing plate 5 and expansion section bottom plate top steel sheet 1 is filled with first leveling base 9;Expansion section bottom plate top steel sheet 1 top welding has with the wide side edge of longitudinal slide rail 3's steel backing plate 5 corresponding leveling base stop edge 10 and with long side edge corresponding grouting baffle 11, this steel backing plate 5 is placed in leveling base stop edge 10 and grouting baffle 11, and the gap between this steel backing plate 5 and expansion section bottom plate top steel sheet 1 and the gap between this steel backing plate 5 and grouting baffle 11 is filled with second leveling base 12, specifically, first leveling base 9 is cement-based grouting material base or epoxy resin base, second leveling base 12 is epoxy resin base, and the epoxy resin self-leveling layer is poured at the bottom of steel backing plate 5 to level, and the good bonding property of epoxy resin can not only serve as the reserve of shear capacity, but also can well adapt to the adverse effects caused by the deformation of pipe jacking structure due to the temperature change in the pipe jacking construction process (pouring concrete in the closed cavity, and the hydration heat generated in the closed cavity).

[0032] A plurality of lug plates 13 are welded on the two wide sides of the steel base plate 5 of the transverse slide rail 2 and the two long sides of the steel base plate 5 of the longitudinal slide rail 3, a plurality of shear-resistant blocking frames 14 corresponding to the lug plates 13 are welded on the top of the top steel plate 1 of the expanded section bottom plate, the shear-resistant blocking frames 14 are in U shape, reinforcing plates are arranged on the two side edges of the shear-resistant blocking frames 14, a positioning plate 15 is welded on the top of the top steel plate 1 of the expanded section bottom plate and located in the shear-resistant blocking frame 14, the lug plate 13 is located in the shear-resistant blocking frame 14 and is connected and fixed with the positioning plate 15 through a leveling bolt, and a wedge block 16 is inserted in the gap between the lug plate 13 and the inner wall of the shear-resistant blocking frame 14. Specifically, the lug plate 13 is responsible for transmitting friction to the U-shaped shear-resistant blocking frame 14, and the shear-resistant blocking frame 14 is welded with the immersed tube structure, so that the welding amount is reduced by more than 60% than directly welding the embedded steel plate on the surface of the immersed tube, and the adverse effects of welding deformation on the flatness of the immersed tube are greatly reduced.

[0033] Construction steps: first, a whole steel plate is used as a steel base plate 5 to support the slide rail, a square frame is formed on the steel base plate 5 through the shear-resistant blocking strips 7, the slide plate 6 is embedded in the square frame and is tightened with M12 internal hexagonal bolts, the epoxy mortar is self-leveling between the steel base plate 5 and the steel plate of the immersed tube structure, and the flatness is adjusted to the design requirement by using M30 special bolts, and the slide rail main body is formed. Secondly, the shear-resistant blocking frames 14 are welded on both sides of the slide rail, the lug plates 13 are welded with the steel base plate 5 as a whole and are responsible for transmitting horizontal shear, and the lug plates 13 transmit the horizontal shear to the main body of the immersed tube steel structure through the wedge blocks 16 and the shear-resistant blocking frames 14. Finally, in the construction stage, after the slide rail is assembled according to the specified position in the design, the push-out section of the final joint of the immersed tube tunnel is pushed into the immersed tube section, and multiple push-pull tests are carried out on land to verify the reliability of the final joint control system, finally the immersed tube section is floated to the installation water area, is sunk to the specified joint, the push-out section is pushed out through the jacking hydraulic system, and the final joint is butt-jointed.

[0034] The utility model modifies the force transmission system, does not bear the shear force by the bolt, but transmits the force to the shear-resistant blocking frames 14 on both sides through the lug plates 13 welded with the steel base plate 5 as a whole, the adhesive force between the epoxy resin and the immersed tube steel plate can also be used as the reserve for bearing the horizontal force between the slide rail and the immersed tube, the structure stress distribution is more uniform, and the problem of excessive stress concentration is eliminated; meanwhile, the service life of the slide rail is improved, and the influence of many adverse factors such as stress change caused by temperature change and immersed tube settlement deformation is overcome.

[0035] In the description of the utility model, need understanding is, the term "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and so on the orientation or positional relationship indicated is based on the orientation or positional relationship shown in the drawing, just is for the convenience of describing the utility model and simplifying the description, and not indicate or imply the device or element indicated must have a particular orientation, with a particular orientation configuration and operation, therefore can not be understood as the restriction of the utility model.

[0036] In addition, the terms "first", "second" are only for the purpose of description, and can not be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features. Therefore, the features defined with "first", "second" can explicitly or implicitly include at least one feature. In the description of the utility model, the meaning of "multiple" is at least two, such as two, three, etc., unless otherwise specifically limited.

[0037] In the utility model, unless otherwise specifically defined and limited, the terms "installation", "connection", "connection", "fixing" and other terms should be understood broadly, for example, it can be fixed connection, or detachable connection, or integrated; It can be mechanical connection, or electrical connection or communication with each other; It can be directly connected, or indirectly connected through intermediate medium, it can be the communication or interaction relationship between two elements, unless otherwise specifically limited. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0038] The utility model is described above in conjunction with the drawings, obviously, the specific implementation of the utility model is not limited by the above mode, as long as various improvements are made by using the method concept and technical scheme of the utility model, or directly applied to other occasions without improvement, all are within the protection scope of the utility model.

Claims

1. A tunnel final joint push-off segment ramp apparatus, characterized by, The application relates to a steel plate structure of a bottom plate of an expansion section of a pipe, which comprises several slide rails arranged on a top steel plate (1) of the bottom plate of the expansion section, each slide rail comprising a transverse slide rail (2) and a longitudinal slide rail (3), and an air inflation water stop belt (4) arranged between the transverse slide rail (2) and the longitudinal slide rail (3), wherein the transverse slide rail (2) and the longitudinal slide rail (3) each comprise a steel base plate (5), a slide plate (6) and a shear resisting baffle (7), a plurality of shear resisting baffles (7) are welded on the top of the steel base plate (5) and divide a plurality of square boxes, the slide plate (6) is embeddedly arranged in the square boxes and is connected and fixed with the steel base plate (5) through bolts. A leveling base frame (8) corresponding to four side edges of the steel base plate (5) of the transverse slide rail (2) is welded on the top of the top steel plate (1) of the bottom plate of the expansion section, the steel base plate (5) is arranged in the leveling base frame (8), and a first leveling base (9) is filled in the gap between the steel base plate (5) and the top steel plate (1) of the bottom plate of the expansion section; a leveling base baffle (10) corresponding to a wide side edge of the steel base plate (5) of the longitudinal slide rail (3) and a grouting baffle (11) corresponding to a long side edge are welded on the top of the top steel plate (1) of the bottom plate of the expansion section, the steel base plate (5) is arranged in the leveling base baffle (10) and the grouting baffle (11), and a second leveling base (12) is filled in the gap between the steel base plate (5) and the top steel plate (1) of the bottom plate of the expansion section and the gap between the steel base plate (5) and the grouting baffle (11). A plurality of lug plates (13) are welded on two wide side edges of the steel base plate (5) of the transverse slide rail (2) and two long side edges of the steel base plate (5) of the longitudinal slide rail (3), a plurality of shear resisting baffle frames (14) corresponding to the lug plates (13) are welded on the top of the top steel plate (1) of the bottom plate of the expansion section, a positioning plate (15) located in the shear resisting baffle frame (14) is welded on the top of the top steel plate (1) of the bottom plate of the expansion section, the lug plate (13) is arranged in the shear resisting baffle frame (14) and is connected and fixed with the positioning plate (15) through leveling bolts, and a wedge block (16) is arranged in the gap between the lug plate (13) and the inner wall of the shear resisting baffle frame (14).

2. A tunnel final joint push-off segment ramp apparatus as defined in claim 1, wherein, The number of the slide rails is four, and two of the slide rails are located at two side edges of the pipe, and the other two of the slide rails are located at two sides of the center line of the pipe.

3. A tunnel j oint push-off segment ramp apparatus as defined in claim 1, wherein, The first leveling base (9) is a cement-based grouting material base or an epoxy resin base.

4. A tunnel j oint push-off segment ramp apparatus as defined in claim 1, wherein, The second leveling base (12) is an epoxy resin base.

5. A tunnel j oint push-off segment ramp apparatus as defined in claim 1, wherein, The shear resisting baffle frame (14) is in a U shape, and reinforcing plates are arranged on two side edges of the shear resisting baffle frame (14).

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