Half-range alternate passage road-to-bridge structure for reconstruction and extension of road

Abstract

The utility model relates to a half-range alternate passage road-to-bridge structure for reconstruction and extension of a road. Comprising a double-steel-casing combined structure, an anchor cable reverse light soil embankment steel sheet pile protection structure used for half-range vertical excavation protection construction of the original road surface soil layer road-to-bridge change after bridge excavation, and a light soil embankment opposite-pull anchor cable steel sheet supporting structure used for slope protection construction of the original road surface soil layer road-to-bridge change after bridge excavation. The light soil embankment steel sheet pile protection structure has the advantages that the anchor cables are adopted for reversely building the light soil embankment steel sheet pile protection structure, a building envelope is formed through the steel sheet piles, extra supporting force is provided in combination with the anchor cables, and the stability of a foundation pit is effectively guaranteed; the light soil embankment opposite-pull anchor cable steel plate supporting structure is adopted, and the stability and the bearing capacity of a supporting system are effectively improved; the opposite-pulling anchor cables are arranged in the light soil embankment and are connected with the steel plates to form an integral stress structure, so that the soil body pressure is effectively dispersed, and the burden of the self weight of the embankment on a foundation is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to civil engineering field especially including a highway reconstruction and extension half width alternate traffic road reconstruction bridge structure. BACKGROUND

[0002] The highway reconstruction and extension half width alternate traffic road reconstruction bridge is a common construction scheme in highway reconstruction and extension engineering. The scheme enables traffic to continue during construction through half width alternate traffic, and the original bridge is reconstructed and extended to adapt to the increase of traffic demand. At present, this construction method has been applied in some projects and has achieved certain results.

[0003] However, there are still some problems to be solved in the current research. First of all, traffic safety during construction needs attention. Although half width alternate traffic can reduce the impact on traffic, it also increases the traffic safety hidden danger, and needs to strengthen the traffic management and safety measures during construction. Secondly, the influence of construction on traffic needs to be reduced. Since the construction will inevitably have some impact on traffic, effective measures need to be taken to reduce this impact, such as reasonable arrangement of construction time and traffic flow, advance traffic dredging, etc. In addition, the construction technology and process need to be continuously improved and perfected. The technology and process of the highway reconstruction and extension half width alternate traffic road reconstruction bridge structure and construction method still have some shortcomings, which need to be further researched and improved to improve the construction efficiency and quality.

[0004] In summary, in order to further promote the development and application of highway reconstruction and extension half width alternate traffic road reconstruction bridge structure, it is necessary to strengthen the relevant research and technological research, pay attention to the traffic safety during construction, reduce the influence of construction on traffic, and continuously improve and perfect the technology to provide more reliable and economic technical support for highway reconstruction and extension engineering. UTILITY MODEL CONTENT

[0005] The utility model aims at overcoming the deficiency in prior art, and provides a highway reconstruction and extension half width alternate traffic road reconstruction bridge structure.

[0006] The highway reconstruction and extension half width alternate traffic road reconstruction bridge structure comprises a pier column, an abutment, a pile body, an original road surface soil layer, a double steel casing combination structure, an anchor cable reverse construction light soil embankment steel sheet pile protection structure for vertical excavation protection construction of the original road surface soil layer road reconstruction bridge half width after bridge excavation, and a light soil embankment counter pulling anchor cable steel sheet support structure for slope protection construction of the original road surface soil layer road reconstruction bridge after bridge excavation.

[0007] The anchor cable reverse construction light soil embankment steel sheet pile protection structure is arranged below the abutment, and comprises a steel sheet pile, foam concrete filled between the steel sheet pile and a rear soil retaining wall, and anchor rods fixed to the steel sheet pile towards the foam concrete.

[0008] The double-steel-casing combined structure comprises an outer casing and an inner casing, a pile body is poured inside the outer casing, and a pier column is poured inside the inner casing.

[0009] Preferably, the anchor cable reverse construction light soil embankment steel sheet pile protection structure comprises bolts, anchor rods, a steel sheet pile, a foundation base plate and foam concrete.

[0010] Preferably, the light soil embankment anchor cable steel sheet pile support structure is used for original pavement soil slope protection, and comprises foam concrete, anchor cables, steel sheets, anchor devices and backing plates.

[0011] Preferably, the double-steel-casing combined structure is used for pier column and pile body construction, and comprises an outer casing, an inner casing, positioning rods and positioning grooves.

[0012] Preferably, the inner side of the outer casing is provided with a construction basket for pouring the pier column and the pile body.

[0013] Preferably, the anchor rods pass through the reserved holes of the steel sheet pile and are anchored outside the steel sheet pile at the end by bolts.

[0014] The anchor cable reverse construction light soil embankment steel sheet pile protection structure has the advantages that the steel sheet pile forms a support structure, additional support force is provided by the anchor cable, the stability of the foundation pit is effectively ensured, the reverse construction method is used for step-by-step downward excavation in the construction process, the risk of collapse and deformation is reduced, the half-vertical excavation method is adopted, the influence on the surrounding environment and traffic is reduced, the anchor cable reverse construction light soil embankment steel sheet pile protection structure is suitable for construction scenes in limited spaces such as underground engineering, tunnels and subway foundation pits, and has the advantages of high construction flexibility, high safety and high efficiency.

[0015] 1) The anchor cable reverse construction light soil embankment steel sheet pile protection structure has the advantages that the steel sheet pile forms a support structure, additional support force is provided by the anchor cable, the stability of the foundation pit is effectively ensured, the reverse construction method is used for step-by-step downward excavation in the construction process, the risk of collapse and deformation is reduced, the half-vertical excavation method is adopted, the influence on the surrounding environment and traffic is reduced, the anchor cable reverse construction light soil embankment steel sheet pile protection structure is suitable for construction scenes in limited spaces such as underground engineering, tunnels and subway foundation pits, and has the advantages of high construction flexibility, high safety and high efficiency.

[0016] 2) The double steel casing combined structure of the utility model is exquisite in design, can realize rapid and accurate positioning and installation of the steel casing through cooperation of the positioning rod and the positioning groove, effectively guarantees perpendicularity and stability, plays an important role in pile body and pier column connection construction, ensures efficiency and accuracy of the connection process, reduces installation error and construction difficulty, improves bearing capacity and safety of the overall structure, and has remarkable engineering application value and popularization potential.

[0017] 3) The light soil embankment counter-pulled anchor cable steel plate supporting structure effectively improves stability and bearing capacity of the supporting system; the counter-pulled anchor cable is arranged in the light soil embankment, and the anchor cable is connected with the steel plate to form an overall stress structure, thereby effectively dispersing soil pressure, reducing burden of the embankment self-weight on the foundation, and improving anti-slippage and anti-settlement performance of the embankment; the structure is not only convenient to construct and low in material cost, but also can adapt to different geological conditions, and has good practicality and economic benefits. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 is a three-dimensional schematic view of half-width vertical excavation of anchor cable reverse construction steel sheet pile protection;

[0019] Figure 2 is a vertical surface schematic view of half-width vertical excavation of anchor cable reverse construction steel sheet pile protection;

[0020] Figure 3 is a cross-sectional schematic view of highway reconstruction and expansion half-width alternate traffic road reconstruction bridge structure;

[0021] Figure 4 is a three-dimensional schematic view of highway reconstruction and expansion half-width alternate traffic road reconstruction bridge structure;

[0022] Figure 5 is a schematic view of division of reserved core soil bridge head cone slope excavation soil;

[0023] Figure 6 is a three-dimensional schematic view of counter-pulled anchor cable supporting construction;

[0024] Figure 7 is a vertical surface schematic view of counter-pulled anchor cable supporting construction;

[0025] Figure 8 is a schematic view of counter-pulled anchor cable supporting structure;

[0026] Figure 9 is a three-dimensional schematic view of roadbed lead hole pile foundation completion;

[0027] Figure 10 is a three-dimensional schematic view of roadbed lead hole pile foundation;

[0028] Figure 11This is a three-dimensional schematic diagram of a half-section of the joint of a variable-diameter steel casing protective pile;

[0029] Figure 12 This is a three-dimensional schematic diagram of the connection of the protective pile with variable diameter steel casing;

[0030] Figure 13 This is a three-dimensional schematic diagram of the outer casing structure;

[0031] Figure 14 This is a three-dimensional schematic diagram of the inner casing structure;

[0032] Figure 15 This is a schematic diagram of the inner casing structure;

[0033] Figure 16 This is a half-section plan view of the joint of the variable diameter steel casing protection pile;

[0034] Figure 17 This is a schematic diagram of the connection of the variable diameter steel casing protective pile;

[0035] Figure 18 This is a schematic diagram of the outer casing structure.

[0036] Explanation of reference numerals in the attached drawings: 1-pier, 2-construction basket, 3-bolt, 4-bridge deck, 5-anchor, 6-suspension wire rope, 7-upper soil block, 8-lower soil block, 9-sheet pile, 10-supporting groove, 11-abutment, 12-pile body, 13-rear retaining wall, 14-foundation slab, 15-foamed concrete, 16-stayed anchor cable, 17-steel plate, 18-anchor, 19-pad plate, 20-original road surface soil layer, 21-outer casing, 22-inner casing, 23-pile hole, 24-positioning rod, 25-positioning groove, 26-reserved side soil. Detailed Implementation

[0037] The present invention will be further described below with reference to embodiments. The description of the embodiments below is only for the purpose of helping to understand the present invention. It should be noted that, for those skilled in the art, several modifications can be made to the present invention without departing from the principle of the present invention, and these improvements and modifications also fall within the protection scope of the claims of the present invention.

[0038] As one example, such as Figures 1 to 18 As shown, this type of highway reconstruction and expansion project, which involves alternating half-width traffic lanes and bridges, includes: pier 1, abutment 11, pile 12, original road surface soil layer 20, double steel casing combined structure, anchor cable reverse lightweight earth embankment steel sheet pile protection structure for the vertical excavation protection construction of the original road surface soil layer 20 half-width lane for bridge reconstruction after bridge construction, and lightweight earth embankment tie-anchor cable steel sheet support structure for the slope protection construction of the original road surface soil layer 20 lane for bridge reconstruction after excavation.

[0039] like Figures 1 to 4As shown, the anchor cable reverse construction light soil embankment steel sheet pile protection structure is arranged below the abutment 11, and is used for vertical excavation protection construction of the half-width of the original road surface soil layer 20 during the "road to bridge" construction of the "bridge first and then digging"; the anchor cable reverse construction light soil embankment steel sheet pile protection structure comprises a bolt 3, an anchor rod 5, a steel sheet pile 9, a foundation bottom plate 14 and foamed concrete 15; the steel sheet pile 9 is obliquely arranged with a plurality of anchor rods 5 on the side surface, and is fixed by the bolt 3; the inner side of the bottom of the steel sheet pile 9 is provided with the foundation bottom plate 14; and the foamed concrete 15 is filled between the steel sheet pile 9 and the rear soil retaining 13.

[0040] As shown in Figures 6 to 8 , the light soil embankment counter-pulling anchor cable steel sheet supporting structure is used for the slope protection of the original road surface soil layer 20 during the "road to bridge" construction of the "bridge first and then digging"; the light soil embankment counter-pulling anchor cable steel sheet supporting structure comprises foamed concrete 15, a counter-pulling anchor cable 16, a steel sheet 17, an anchor device 18 and a pad plate 19; the steel sheets 17 are connected by the counter-pulling anchor cable 16, and the end of the counter-pulling anchor cable 16 is fixed by the anchor device 18 and the pad plate 19; the pad plate 19 is arranged between the steel sheet 17 and the anchor device 18; and the steel sheet 17 is arranged on both sides of the reserved side soil body 26.

[0041] As shown in Figures 9 to 18 , the double-steel-casing combined structure is used for the construction of the pier column 1 and the pile body 12; the double-steel-casing combined structure comprises an outer side casing 21, an inner side casing 22, a positioning rod 24 and a positioning groove 25; the inner side casing 22 is clamped in the inner side of the outer side casing 21; the inner side of the outer side casing 21 is provided with the positioning groove 25; and the outer side of the inner side casing 22 is provided with the positioning rod 24.

[0042] As shown in Figure 11 , the inner side of the outer side casing 21 is provided with the construction basket 2 for the pouring of the pier column 1 and the pile body 12; and the positioning rod 24 is placed in the positioning groove 25.

[0043] As shown in Figure 1 and Figure 2 , the anchor rod 5 passes through the reserved hole of the steel sheet pile 9, and is anchored to the outer side of the steel sheet pile 9 by the bolt 3 at the end; the counter-pulling anchor cable 16 passes through the reserved hole of the steel sheet 17 in sequence, the end of the counter-pulling anchor cable 16 passes through the pad plate 19, and then is anchored to the outer side of the steel sheet 17 by the anchor device 18.

[0044] The various embodiments in the specification are described in a progressive manner, and each embodiment focuses on the difference from other embodiments. The same or similar parts of each embodiment can be referred to each other.

Claims

1. A highway reconstruction half-alternate passage road-to-bridge structure, characterized by, The application relates to a combined structure of a pier column, an abutment, a pile body, an original road surface soil layer, double-steel casings, an anchor cable reverse construction light soil embankment steel sheet pile protection structure for a bridge construction after road excavation of the original road surface soil layer and a light soil embankment anchor cable steel sheet supporting structure for slope protection of the original road surface soil layer in a road reconstruction bridge construction. The anchor cable reverse construction light soil embankment steel sheet pile protection structure is arranged below the abutment and comprises a steel sheet pile, foam concrete filled between the steel sheet pile and a rear soil retaining wall and anchor rods fixed to the steel sheet pile towards the foam concrete. The double-steel casing combined structure comprises an outer casing and an inner casing, the pile body is cast in the inner casing and the pier column is cast in the outer casing. The anchor cable reverse construction light soil embankment steel sheet pile protection structure comprises bolts, anchor rods, a steel sheet pile, a foundation bottom plate and foam concrete, the steel sheet pile is fixed with the anchor rods through the bolts, the foundation bottom plate is arranged on the inner side of the bottom of the steel sheet pile and the foam concrete is filled between the steel sheet pile and the rear soil retaining wall.

2. The road reconstruction half-alternate passage road-to-bridge structure according to claim 1, characterized by: The light soil embankment anchor cable steel sheet supporting structure is used for slope protection of the original road surface soil layer and comprises foam concrete, anchor cables, steel sheets, anchor devices and backing plates, the steel sheets are connected through the anchor cables, the anchor cables are fixed at the ends through the anchor devices and the backing plates, the backing plates are arranged between the steel sheets and the anchor devices and the steel sheets are arranged on both sides of the reserved side soil body.

3. The road reconstruction half-alternate passage road-to-bridge structure according to claim 1, characterized by: The double-steel casing combined structure is used for pier column and pile body construction and comprises an outer casing, an inner casing, positioning rods and positioning grooves, the inner casing is clamped in the inner side of the outer casing, the inner side of the outer casing is provided with the positioning grooves and the outer side of the inner casing is provided with the positioning rods.

4. The road reconstruction half-alternate passage road-to-bridge structure according to claim 1, characterized by: The inner side of the outer casing is provided with a construction basket for pouring the pier column and the pile body, and the positioning rods are arranged in the positioning grooves.

5. The road reconstruction half-alternate passage road-to-bridge structure according to claim 4, characterized by: The anchor rods pass through the reserved holes of the steel sheet pile and are anchored on the outer side of the steel sheet pile through the bolts at the ends, the anchor cables pass through the reserved holes of the steel sheets in sequence, the ends of the anchor cables pass through the backing plates and are anchored on the outer sides of the steel sheets through the anchor devices.

6. The road reconstruction half-alternate passage road-to-bridge structure according to claim 1, characterized by: ​

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