Precast concrete pouring jacket for strip-shaped bearing platform

Abstract

The utility model discloses a strip-shaped bearing platform precast concrete pouring jacket, which belongs to the technical field of deepwater bridge bearing platform construction and comprises a box body, a water stop belt and a support hoop, the box body is of a high-strength glass fiber fine stone reinforced concrete thin plate structure, the support hoop is arranged on a pile foundation, the box body is sleeved on the pile foundation and placed on the support hoop, and the water stop belt is arranged on the box body. The water stop belt is arranged between the box body and the pile foundation; the inner bottom and the inner wall of the box body are both provided with internal lap joint reinforcing bars which are poured together with the bearing platform. The water sealing device solves the problem of water sealing in deepwater bearing platform construction, a good closed environment is provided for a bearing platform straining beam, meanwhile, due to the design of the high-strength concrete shell, the high-strength concrete shell can be directly used as a protection device of the bearing platform without being detached, and the corrosion resistance of an underwater concrete structure is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of deep-water bridge pedestal construction and provides a strip pedestal prefabricated concrete casing. Background Art

[0002] In recent years, the transportation industry has developed rapidly, especially the large-scale infrastructure construction carried out by the country to promote consumption, and highway construction has ushered in unprecedented development. Expressways are built from north to south, from east to west, and from plains to mountainous areas. Bridges, as the main way to cross adverse terrain, account for a large proportion in highway and railway design.

[0003] When a bridge spans a long distance across a river, lake or sea, structures such as pile foundations and pedestals are mostly located below the water surface, and require structures such as cofferdams or caissons to provide space for pedestal construction. Currently, the cofferdam and caisson technologies used in deep-water pedestals and tie beams are mostly steel structures, but there are still shortcomings such as long structural construction time and greater safety risks, and two processes are required: installation and dismantling. Utility Model Content

[0004] In view of this, the purpose of the utility model is to provide a strip-shaped precast concrete casing to solve the water sealing problem of deep-water pedestal construction and provide a closed environment for the pedestal tie beams. At the same time, the design of the high-strength concrete shell improves the corrosion resistance of the underwater concrete structure.

[0005] In order to achieve the above object, the utility model provides the following technical solutions:

[0006] The utility model provides a strip-shaped precast concrete casing, including a casing, a water stop and a support hoop. The casing is a high-strength glass fiber fine stone reinforced concrete thin plate structure, which has the characteristics of light weight, high strength and corrosion resistance. The support hoop is arranged on the pile foundation, and the casing is sleeved on the pile foundation and placed on the support hoop to form a closed space, which provides a closed environment for the casing tie beam. The water stop is arranged between the casing and the pile foundation, and the water stop plays a waterproof role, which can effectively prevent water penetration and ensure the dryness and stability of the construction environment; the inner bottom and inner wall of the casing are provided with internal lap reinforcement cast together with the casing, and the internal lap reinforcement is cast together with the casing, which can increase the strength and stability of the entire structure and improve the earthquake resistance and deformation resistance of the concrete structure. The above scheme adopts a high-strength glass fiber fine stone reinforced concrete thin plate structure, and sets water stop and internal lap reinforcement, etc., to provide a reliable closed solution for deep-water casing construction.

[0007] Optionally, the concrete grade of the box body is higher than that of the cap, which means that the concrete used in the box body can have a higher strength to increase the bearing capacity and stability of the box body.

[0008] Optionally, the box is provided with hanging parts for hanging lifting ropes. These hanging parts can be specially designed metal rings or buckles, which are used to connect lifting ropes or hooks to facilitate the hanging and installation of the box, ensuring the smooth construction of the deep-water cap.

[0009] Optionally, it also includes a reinforcement steel sleeve with an axial opening, which is detachably connected to the box body through connecting bolts, and the hanger is arranged on the reinforcement steel sleeve. The reinforcement steel sleeve is detachably connected to the box body through connecting bolts to enhance the structural strength and stability of the box body to meet the requirements of deepwater cap construction.

[0010] Optionally, an internal support is provided inside the reinforced steel sleeve, and the internal support is composed of a cross arm and a diagonal brace. The two ends of the cross arm are respectively arranged on a relative inner wall of the reinforced steel sleeve; the diagonal brace is arranged at the inner corner of the reinforced steel sleeve, and at the corner between the inner wall of the reinforced steel sleeve and the cross arm. This structure can effectively enhance the overall rigidity and load-bearing capacity of the reinforced steel sleeve, thereby improving the overall stability of the box. The two ends of the cross arm are respectively arranged on the relative inner walls, which can provide lateral support and connection, making the overall structure of the reinforced steel sleeve more solid. The diagonal brace is arranged at the inner corner of the reinforced steel sleeve and at the corner between the inner wall of the reinforced steel sleeve and the cross arm, which can provide oblique support and stability to prevent the reinforced steel sleeve from tilting or deforming when subjected to external force.

[0011] Optionally, a rubber water stop pad is installed at the joint between the reinforced steel sleeve and the box body. This improves the sealing and waterproof performance of the joint. The rubber water stop pad has good softness and elasticity, can adapt to different joint shapes and sizes, and ensure a tight fit at the joint.

[0012] Optionally, the water stop strip adopts an inflatable water stop rubber structure. The air pressure makes the rubber water stop strip fit tightly between the pile foundation and the box body to ensure that there is no gap, thereby achieving a better sealing effect and effectively preventing moisture from penetrating into the joints.

[0013] Optionally, the internal lap reinforcement is densely distributed with small diameter steel bars, which can increase the strength and rigidity of the box during the pouring process with the cap, thereby improving the bearing capacity and deformation resistance of the box outside the cap.

[0014] The beneficial effects of the utility model are:

[0015] 1. Short construction period, greatly improving construction efficiency. The combined design of cofferdam and pedestal template does not require additional cofferdam and other water retaining structures, saving the time of cofferdam insertion, installation and removal, and achieving high construction efficiency.

[0016] 2. Small material requirements. Only concrete and steel bars are needed to make prefabricated casings, and no large amount of steel is needed to make cofferdams and foundation steel formwork.

[0017] 3. The structure is relatively simple and the installation speed is fast. When installing the concrete casing, it can be installed by using crawler crane + manual auxiliary adjustment.

[0018] 4. The box structure has good integrity and waterproofness. Only the water inside the box needs to be pumped out, and the amount of pumping work is small. The precast concrete box is cast in one go, with good integrity, avoiding the leakage problem that is easy to occur in steel cofferdams.

[0019] 5. The high-strength glass fiber box outside the base improves the corrosion resistance of the structure and is conducive to the durable use of the structure.

[0020] Other advantages, objectives and features of the present invention will be described in the following description to some extent, and will be apparent to those skilled in the art based on the following examination and research, or can be taught from the practice of the present invention to some extent. The objectives and other advantages of the present invention can be achieved and obtained through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to make the purpose, technical solution and advantages of the utility model clearer, the utility model will be described in detail below in conjunction with the accompanying drawings, in which:

[0022] Figure 1 This is a front structural schematic diagram of the first embodiment of the strip-shaped cap precast concrete casing of the utility model;

[0023] Figure 2 for Figure 1 A schematic diagram of the side structure of

[0024] Figure 3 for Figure 1 A schematic diagram of a top view structure;

[0025] Figure 4 It is a schematic diagram of the internal lap reinforcement structure of the precast concrete casing of the strip-shaped cap of the utility model;

[0026] Figure 5 This is a front structural schematic diagram of the second embodiment of the strip-shaped cap precast concrete casing of the utility model;

[0027] Figure 6 for Figure 5 A schematic diagram of the side structure of

[0028] Figure 7 for Figure 5 A schematic diagram of a top view structure;

[0029] Figure 8 This is a schematic diagram of the hoisting of the second embodiment of the strip-shaped cap precast concrete casing of the utility model;

[0030] Fig. 9This is a schematic diagram of the installation of the second embodiment of the strip-shaped cap precast concrete casing of the utility model;

[0031] Fig.10 This is a schematic diagram of the construction of the inner cap of the second embodiment of the strip cap precast concrete casing of the utility model;

[0032] Fig.11 This is a schematic diagram of dismantling the second embodiment of the strip cap precast concrete casing of the utility model;

[0033] Figure numerals: box body 1, water stop 2, support hoop 3, hanger 4, pedestal 5, reinforcement steel sleeve 6, inner support 7, connecting bolt 8, pile foundation 9, pier 10, internal lap reinforcement 11; cross arm 71, diagonal brace 72. DETAILED DESCRIPTION

[0034] The utility model is further described below in conjunction with specific implementation methods. The drawings are only used for exemplary descriptions, and are only schematic diagrams, not actual pictures, and cannot be understood as limitations on this patent; in order to better illustrate the embodiments of the utility model, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of the actual product; for those skilled in the art, it is understandable that some well-known structures and their descriptions in the drawings may be omitted.

[0035] Embodiment 1

[0036] like Figure 1-4 As shown, a strip-shaped prefabricated concrete casing mentioned in the utility model includes a casing 1, a water stop 2 and a support hoop 3. The casing 1 is a high-strength glass fiber fine stone reinforced concrete thin plate structure, which has the characteristics of light weight, high strength and corrosion resistance. The support hoop 3 is arranged on the pile foundation 9, and the casing 1 is mounted on the pile foundation 9 and placed on the support hoop 3 to provide vertical support force and form a closed space, providing a closed environment for the casing tie beam. The water stop 2 is arranged between the casing 1 and the pile foundation 9. The water stop 2 plays a waterproof role and can effectively prevent water penetration, ensuring the dryness and stability of the construction environment; the inner bottom and inner wall of the casing 1 are provided with internal lap reinforcement 11 cast together with the casing 5. The internal lap reinforcement 11 is cast together with the casing 5, which can increase the strength and stability of the entire structure and improve the earthquake resistance and deformation resistance of the concrete structure. The above scheme provides a reliable closed solution for deep-water pier construction by adopting high-strength glass fiber fine stone reinforced concrete thin plate structure, setting up water stop belts and internal lap reinforcement.

[0037] In this embodiment, the concrete grade of the box body 1 is higher than that of the cap 5. By using high-grade concrete, the compression, bending and corrosion resistance of the box body can be improved, so that it can withstand greater loads, forces and corrosion.

[0038] In this embodiment, the box 1 is provided with a hanger 4 for hanging a hoisting rope. By arranging the hanger on the box, the box can be conveniently hoisted to a desired position. This is especially important for deepwater cap construction, because the box usually needs to be suspended and installed underwater. The design of the hanger should take into account the weight and force it bears to ensure the safety and stability of the hoisting process.

[0039] The water stop strip 2 in this embodiment adopts an inflatable water stop rubber structure. The water stop rubber structure has good elasticity and softness, can adapt to joints of different shapes and sizes, and ensures a tight fit at the joints; and the inflatable water stop rubber structure is simple and convenient to install, and only needs to fill the rubber into the joint and inflate it through the inflator.

[0040] In this embodiment, the internal lap reinforcement 11 is densely distributed with small diameter steel bars. The small diameter steel bars can be closely arranged and form an effective bond with the concrete, which can increase the strength and rigidity of the connection between the box body and the pedestal, reduce the possibility of deformation and cracking, and maintain good mechanical properties in long-term use. Of course, in different examples, the inner wall concrete of the box body 1 can also be roughened to ensure good bonding with the newly poured concrete.

[0041] Embodiment 2

[0042] like Figure 5-7 As shown, the strip cap precast concrete casing also includes a reinforcement steel casing 6 with an axial opening, which is detachably connected to the box body 1 through connecting bolts 8, and the hanger 4 is arranged on the reinforcement steel casing 6. Through the connecting bolts, the reinforcement steel casing can be firmly fixed to the box body, providing additional reinforcement and support to increase the overall strength of the box body, so that it can withstand greater loads and forces. In addition, the hanger can be arranged on the reinforcement steel casing. In this way, the hanger can be tightly connected to the reinforcement steel casing to provide support for the suspension and installation of the box body.

[0043] In the present embodiment, the reinforced steel sleeve 6 is provided with an inner support 7, which is composed of a cross arm 71 and a diagonal support 72. The two ends of the cross arm 71 are respectively arranged on one opposite inner wall of the reinforced steel sleeve 6; the diagonal support is arranged at the inner corner of the reinforced steel sleeve 6, and at the corner between the inner wall of the reinforced steel sleeve 6 and the cross arm 71. The establishment of such an inner support structure can effectively increase the load-bearing capacity and compression resistance of the reinforced steel sleeve, so that it can withstand greater external forces and pressures, thereby enhancing the overall stability of the box. In addition, the inner support can also reduce the vibration and swing of the box during transportation and stacking, and protect the integrity and hoisting performance of the box.

[0044] In this embodiment, a rubber water-stop pad is installed at the joint between the reinforced steel sleeve 6 and the box body 1, which helps to improve the sealing and waterproof performance of the joint.

[0045] In another embodiment, the inner support 7 arranged in the reinforced steel sleeve 6 can be used as a temporary support structure, and embedded connectors can be arranged during the prefabrication process of the box 1 to set up a temporary support structure through the embedded connectors, thereby enhancing the overall stability of the box during lifting and installation.

[0046] like Figure 8-11 As shown, when in use, this prefabricated concrete casing is made according to the shape of the strip cap, and a docking interface with the pile foundation 9 is reserved. After the bridge pile foundation is poured and the strength reaches the standard, the support hoop 3 is installed on the pile foundation 9, and then the box body 1 is hoisted and sleeved on the pile foundation 9 and placed on the support hoop 3, so that the casing is lowered from the top of the pile foundation to fit the two pile foundations, and the water is gradually pumped out and the working condition of the water stop belt is checked. After the pumping is completed, the interface between the box body 1 and the pile foundation 9 is inflated for a secondary plugging to achieve a double water-stopping effect; then the pile head of the pile foundation 9 is broken and the steel bars are installed in the box body 1, and the casing wall is directly used as a concrete template to pour the cap 5 concrete and form the pier 10. After the pouring of the cap 5 concrete is completed, this prefabricated concrete casing is not dismantled and continues to play a role in protecting the cap concrete structure. When the size of the pedestal 5 is large, embedded connectors and internal support structures can be set inside the precast concrete casing to provide temporary support during construction to ensure that the casing does not suffer structural damage. When the concrete is poured to the corresponding internal support position, the internal support structure is removed and the pouring of concrete continues; alternatively, a detachable reinforcement steel casing 6 is provided on the box body 1 through connecting bolts 8 to provide additional reinforcement and support to increase the overall strength of the box body so that it can withstand greater loads and forces.

[0047] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model has been described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution, which should be included in the scope of the claims of the utility model.

Claims

1. A strip-shaped precast concrete casing, comprising a casing (1), a water stop (2) and a support hoop (3), characterized in that: The box body (1) is a high-strength glass fiber fine stone reinforced concrete thin plate structure, the support hoop (3) is arranged on the pile foundation (9), the box body (1) is mounted on the pile foundation (9) and placed on the support hoop (3), and the water stop strip (2) is arranged between the box body (1) and the pile foundation (9); the inner bottom and inner wall of the box body (1) are provided with internal lap reinforcement (11) cast together with the base (5).

2. The strip cap precast concrete casing according to claim 1 is characterized in that: The concrete grade of the box body (1) is higher than the concrete grade of the foundation (5).

3. The strip cap precast concrete casing according to claim 1 or 2, characterized in that: The box body (1) is provided with a hanging piece (4) for hanging a hanging rope.

4. The strip cap precast concrete casing according to claim 3 is characterized in that: It also comprises a reinforcing steel sleeve (6) with an axial opening, wherein the reinforcing steel sleeve (6) is detachably connected to the box body (1) via connecting bolts (8), and the hanging member (4) is arranged on the reinforcing steel sleeve (6).

5. The strip cap precast concrete casing according to claim 4 is characterized in that: The reinforcing steel sleeve (6) is provided with an inner support (7), and the inner support (7) is composed of a cross arm (71) and an oblique support (72), and the two ends of the cross arm (71) are respectively arranged on an opposite inner wall of the reinforcing steel sleeve (6); the oblique support is arranged at the inner corner of the reinforcing steel sleeve (6), and at the corner between the inner wall of the reinforcing steel sleeve (6) and the cross arm (71).

6. The strip cap precast concrete casing according to claim 4, characterized in that: A rubber water-stop pad is installed at the joint between the reinforcement steel sleeve (6) and the box body (1).

7. The strip cap precast concrete casing according to claim 1, characterized in that: The water stop strip (2) adopts an inflatable water stop rubber structure.

8. The strip cap precast concrete casing according to claim 1, characterized in that: The internal lap reinforcement (11) is densely distributed with small diameter steel bars.

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