Cast-in-place formwork device of vertical shaft heading machine

Abstract

The utility model discloses a cast-in-place formwork device of a vertical shaft heading machine, which comprises a derrick arranged above a vertical shaft and a formwork erecting operation platform arranged inside the vertical shaft, the formwork erecting operation platform is an annular platform and is fixed on surrounding rock of the vertical shaft through a plurality of hydraulic supporting shoes, and the derrick is connected with the formwork erecting operation platform through a traction assembly. A cast-in-place steel formwork is erected on the formwork erecting operation platform around the well wall by a circle, the cast-in-place steel formwork is divided into two disconnected parts, the two parts are blocked through a strip-shaped air bag and connected through a demolding oil cylinder, the demolding oil cylinder is in a complete stretching-out state, a pouring window is reserved in the cast-in-place steel formwork, and a circle of edge sealing air bag is further arranged at the bottom of the outer side of the cast-in-place steel formwork. The edge sealing air bag is plugged between the cast-in-place steel formwork and the shaft surrounding rock. Supporting concrete is poured through the pouring window, after a concrete supporting layer is formed, the strip-shaped air bag can be taken down, and the cast-in-place steel formwork is separated from the concrete supporting layer by recycling the demolding oil cylinder, so that rapid demolding is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of shaft excavation, in particular to a cast-in-place template device of a shaft boring machine. Background Art

[0002] Existing shaft excavation technology and equipment have various deficiencies such as poor adaptability to rock formations, high safety risks, high construction costs, and complex construction techniques. Especially in the construction of shaft support, the existing shaft surrounding rock support layer mostly adopts the form of segment assembly, and there are two ways to assemble the segments: one is to complete the shaft first and then assemble the segments, which will greatly delay the construction progress; the other is to assemble the segments while excavating the shaft, and the segment assembly is carried out through a large amount of support, which has high labor intensity and low efficiency for construction workers. The existing shaft surrounding rock support layer also adopts cast-in-place concrete, but the existing cast-in-place structure is inconvenient to demould and has a complex structure. Utility Model Content

[0003] In view of the problems existing in the above-mentioned prior art, the utility model aims to provide a cast-in-place formwork device for a shaft boring machine, so as to solve the problems of high labor intensity, low construction efficiency and inconvenient demoulding in the existing shaft support construction.

[0004] In order to achieve the above-mentioned purpose, the utility model proposes a cast-in-place formwork device for a shaft boring machine, comprising a derrick arranged above the shaft, and also comprising a formwork working platform arranged inside the shaft, wherein the formwork working platform is an annular platform, which is fixed to the surrounding rock of the shaft by multiple hydraulic support shoes, and the derrick is connected to the formwork working platform by a pulling assembly, and a cast-in-place steel formwork is set up on the formwork working platform around the shaft wall, and the cast-in-place steel formwork is divided into two disconnected parts, which are sealed by a strip air bag and connected by a demoulding cylinder, and the demoulding cylinder is in a fully extended state, and a casting window is reserved on the cast-in-place steel formwork, and a circle of edge-sealing air bags is also provided on the outer bottom of the cast-in-place steel formwork, and the edge-sealing air bags are sealed between the cast-in-place steel formwork and the surrounding rock of the shaft.

[0005] In the above scheme: a demoulding telescopic sleeve is also provided between the two parts of the cast-in-place steel formwork, the demoulding telescopic sleeve and the demoulding oil cylinder are both arranged on the inner side wall of the cast-in-place steel formwork, and the demoulding telescopic sleeve plays a guiding role.

[0006] In the above scheme: a circle of protective railings is provided at the inner end of the formwork operation platform to ensure construction safety.

[0007] In the above scheme: the two parts of the cast-in-place steel formwork are assembled from a number of arc-shaped formworks, and a single arc-shaped formwork is small in size, light in weight, and convenient to transport.

[0008] In the above scheme: when the demoulding cylinder is fully extended, the cast-in-place steel formwork is opened to the casting state, and its size is 5-10cm smaller than the shaft opening; when the demoulding cylinder is fully retracted, the cast-in-place steel formwork is retracted to the demoulding state. The cast-in-place steel formwork is first in the casting state. When the concrete is formed, the strip airbag is removed. At this time, the demoulding cylinder is recovered, so that the cast-in-place steel formwork is in the demoulding state, and demoulding is achieved. The edge sealing airbag is removed after the formwork operation platform steps downward.

[0009] In the above scheme: a steel bar binding frame is set up on the formwork operation platform inside the cast-in-place steel formwork. The steel bar binding frame is a ring-shaped steel frame structure. A stabilizing structure is set up inside the steel bar binding frame. The stabilizing structure is inscribed on the steel bar binding frame. The stabilizing structure can be a rectangular structure composed of four stabilizing rods. A scaffolding board can be set up on the steel bar binding frame to facilitate workers to bind the cast steel bars thereon. The size of the steel bar binding frame is slightly smaller than the size of the cast-in-place steel formwork in the demoulding state, and has a certain anti-dumping effect. When the formwork operation platform rises, it can prevent the cast-in-place steel formwork from over-dumping.

[0010] The beneficial effects of the utility model are: 1. Concrete is poured into the space surrounded by the edge-sealing air bag, the cast-in-place steel formwork and the surrounding rock of the shaft through the pouring window to form a concrete support layer. When the concrete support layer is formed, the strip air bag can be removed, and the cast-in-place steel formwork is separated from the concrete support layer by recovering the demoulding cylinder to achieve demoulding; 2. The edge-sealing air bag is used as a bottom mold to adapt to the uneven initial spraying surface of the surrounding rock of the shaft to avoid leakage; in short, the utility model has a simple structure, high construction efficiency, and convenient and fast demoulding. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0012] Figure 2 It is a structural diagram of cast-in-place steel formwork.

[0013] Figure 3 It is a schematic diagram of the cast-in-place steel formwork being opened to the pouring state.

[0014] Figure 4 It is a schematic diagram of the cast-in-place steel formwork being retracted to the demoulding state.

[0015] Figure 5 It is a schematic diagram of the layout of the steel bar binding rack. DETAILED DESCRIPTION

[0016] like Figure 1 As shown in FIG. 5 , a cast-in-place formwork device for a shaft boring machine is mainly composed of a derrick 2 arranged above the shaft and a formwork operation platform 1 arranged inside the shaft.

[0017] The formwork operation platform 1 is an annular platform, which is fixed on the surrounding rock of the shaft through a plurality of hydraulic support shoes, and the derrick 2 is connected to the formwork operation platform 1 through a pulling assembly.

[0018] A cast-in-place steel formwork 3 is set up around the shaft wall on the formwork operation platform 1. The cast-in-place steel formwork 3 is divided into two parts, which are blocked by a strip airbag 4 and connected by a demoulding cylinder 5. The demoulding cylinder 5 is in a fully extended state. A casting window 6 is reserved on the cast-in-place steel formwork 3. A circle of edge-sealing airbags 7 are also provided on the outer bottom of the cast-in-place steel formwork 3. The edge-sealing airbags 7 are blocked between the cast-in-place steel formwork 3 and the surrounding rock of the shaft.

[0019] Preferably, a demoulding telescopic sleeve 8 is provided between the two parts of the cast-in-place steel formwork 3. The demoulding telescopic sleeve 8 and the demoulding oil cylinder 5 are both provided on the inner side wall of the cast-in-place steel formwork 3, and the demoulding telescopic sleeve 8 plays a guiding role.

[0020] Preferably, a circle of guardrails (not shown) is provided at the inner side end of the formwork operation platform 1 to ensure construction safety.

[0021] Preferably, the two parts of the cast-in-place steel formwork 3 are assembled from a plurality of arc-shaped formworks, and a single arc-shaped formwork is small in size, light in weight, and convenient to transport.

[0022] Preferably, when the demoulding cylinder 5 is fully extended, the cast-in-place steel formwork 3 is opened to the casting state, and its size is 5-10 cm smaller than the shaft opening; when the demoulding cylinder 5 is fully retracted, the cast-in-place steel formwork 3 is retracted to the demoulding state. The cast-in-place steel formwork 3 is first in the casting state, and when the concrete is formed, the strip airbag 4 is removed, and the demoulding cylinder 5 is recovered at this time, so that the cast-in-place steel formwork 3 is in the demoulding state, and demoulding is achieved, and the edge sealing airbag 7 is removed after the formwork work platform 1 steps downward.

[0023] Preferably, a steel bar binding frame 9 is set up on the formwork platform 1 inside the cast-in-place steel formwork 3. The steel bar binding frame 9 is a ring-shaped steel frame structure. A stabilizing structure is set up inside the steel bar binding frame 9, and the stabilizing structure is inscribed on the steel bar binding frame 9. The stabilizing structure can be a rectangular structure composed of four stabilizing rods 10; a scaffolding board can be set up on the steel bar binding frame 9 to facilitate workers to bind the cast steel bars thereon; the size of the steel bar binding frame 9 is slightly smaller than the size of the cast-in-place steel formwork 3 in the demoulding state, and has a certain anti-dumping effect. When the formwork platform 1 rises, it can prevent the cast-in-place steel formwork 3 from over-dumping.

Claims

1. A cast-in-place formwork device for a shaft boring machine, comprising a derrick (2) arranged above the shaft, characterized in that: The invention also comprises a formwork operation platform (1) arranged inside the shaft, the formwork operation platform (1) being an annular platform, which is fixed on the shaft surrounding rock by a plurality of hydraulic support shoes, the derrick (2) being connected to the formwork operation platform (1) by a pulling assembly, a cast-in-place steel formwork (3) being arranged on the formwork operation platform (1) around the shaft wall, the cast-in-place steel formwork (3) being divided into two disconnected parts, the two parts being sealed by a strip air bag (4) and connected by a demoulding cylinder (5), the demoulding cylinder (5) being in a fully extended state, a casting window (6) being reserved on the cast-in-place steel formwork (3), a circle of edge-sealing air bags (7) being arranged on the outer bottom of the cast-in-place steel formwork (3), the edge-sealing air bags (7) being sealed between the cast-in-place steel formwork (3) and the shaft surrounding rock.

2. The cast-in-place formwork device for a shaft boring machine according to claim 1, characterized in that: A demoulding telescopic sleeve (8) is also provided between the two parts of the cast-in-place steel formwork (3), and the demoulding telescopic sleeve (8) and the demoulding oil cylinder (5) are both provided on the inner side wall of the cast-in-place steel formwork (3).

3. The cast-in-place formwork device for a shaft boring machine according to claim 1, characterized in that: The inner end of the formwork operation platform (1) is provided with a circle of protective railings.

4. The cast-in-place formwork device for a shaft boring machine according to claim 1, characterized in that: The two parts of the cast-in-place steel formwork (3) are both assembled from a number of arc-shaped formworks.

5. The cast-in-place formwork device for a shaft boring machine according to claim 1, characterized in that: When the demoulding cylinder (5) is fully extended, the cast-in-place steel formwork (3) is opened to a casting state, and its size is 5-10 cm smaller than the shaft opening; when the demoulding cylinder (5) is fully retracted, the cast-in-place steel formwork (3) is retracted to a demoulding state.

6. The cast-in-place formwork device for a shaft boring machine according to claim 5, characterized in that: A steel bar binding frame (9) is set up on the formwork operation platform (1) inside the cast-in-place steel formwork (3). The steel bar binding frame (9) is a ring-shaped steel frame structure. A stabilizing structure is set up inside the steel bar binding frame (9). The stabilizing structure is inscribed in the steel bar binding frame (9).

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