Shield hoisting hole blocking construction method

Abstract

The invention discloses a shield hoisting hole blocking construction method which comprises the following steps: (1) erecting a top hoisting bracket system: mounting a bailey beam hoisting bracket on a top plate at a hole in a station, and then mounting a supporting hanging bar mechanism on the bailey beam hoisting bracket; (2) negative N-layer middle plate holes are blocked, specifically, a negative N-layer middle plate bottom support system is erected on the lower portions of the hanging bars, formwork system distribution beams are erected on the bottom support system, and then a negative N-layer formwork system is erected; constructing a reinforcing layer of holes of the middle plate on the negative N-layer template system; (3) negative N-1 middle plate holes are blocked, specifically, a negative N layer middle plate bottom support system is dismantled, and the hanging bars are shrunk to the positions of the negative N-1 layer holes; the steps are performed in sequence according to the method in the step (2) until a reinforcing layer is constructed; l is a natural integer greater than or equal to 0 and less than N. The influence on the rail-mounted area and electromechanical decoration construction is reduced to the maximum extent, and the construction efficiency is improved.

Description

Technical Field

[0001] The invention relates to the technical field of underground construction engineering, and in particular to a shield hoisting hole blocking construction method. Background Art

[0002] With the current increase in urbanization level and the number of urban rail transit construction lines, the shield hole sealing operation of the main structure of the station has become an indispensable step in the construction process of subway station structures.

[0003] In this context, after the shield excavation is completed, the shield holes of the existing station are sealed. Traditional construction uses secondary full-floor scaffolding for construction, and the supports and formwork are set up layer by layer from the station floor for construction. Due to the scattered sealing positions and the long construction period of formwork, the lower scaffolding cannot be removed before the upper part is capped. This will affect the driving of the track area or the electromechanical decoration construction, and this construction method will also increase the construction cost.

[0004] In view of this, this patent application is filed. Summary of the invention

[0005] The present invention provides a shield hoisting hole plugging construction method, which is used to solve the technical problems existing in the above-mentioned traditional shield hoisting hole plugging construction method, such as affecting the driving of the track area or the electromechanical decoration construction and the high construction cost.

[0006] The object of the present invention is to provide a shield hoisting hole plugging construction method, which adopts the following technical scheme:

[0007] The following steps are involved:

[0008] (1) Set up the top hanging support system:

[0009] A Bailey beam hoisting bracket is installed on the top plate of the hole in the station, and then a supporting hanging rod mechanism is installed on the Bailey beam hoisting bracket to hang the hanging rod to the lower part of the hole;

[0010] (2) Blocking of holes in the negative N-layer middle plate:

[0011] A negative N-layer middle plate bottom support system is set up at the lower part of the hanging rod, a template system distribution beam is set up on the bottom support system, and then a negative N-layer template system is set up;

[0012] Applying a reinforcement layer for the holes in the plate of the negative N layer on the template system;

[0013] (3) Negative N-1 middle plate hole plugging:

[0014] Remove the bottom support system of the negative N layer middle plate and shrink the suspension rod to the hole position of the negative N-1 layer;

[0015] According to the method in step (2), the negative N-1 layer bottom support system, the negative N-1 layer formwork system distribution beam, and the negative N-1 layer formwork system are sequentially erected until the reinforcement layer is applied;

[0016] (4) When sealing the plate holes in the negative NL layer, repeat the process in step (3) in sequence;

[0017] L is a natural integer greater than or equal to 0, and L is less than N.

[0018] In the present invention, a hoisting support system is set up at the top. In the process of plugging the holes from bottom to top, the bottom support system of the corresponding layer can be removed after the holes of each layer are plugged, and the plugging of the upper layer can be continued. This greatly reduces the impact on the driving progress of the track area and the impact on the electromechanical decoration construction progress of the corresponding layer. Construction can be carried out all day, and simultaneous construction saves construction time and reduces construction costs. In addition, the construction method of the present invention has no support, no disturbance, high erection efficiency, low dismantling difficulty, reduces the difficulty of operation in a limited space, minimizes the impact on the track area and electromechanical decoration construction, and speeds up the construction progress.

[0019] The reinforcement layer in the present invention can be steel bars and / or concrete, and L can be 0, 1 or 2.

[0020] As a preferred design, after the reinforced concrete construction of the middle slab of the first underground floor is completed, the holes in the top slab are sealed:

[0021] Remove the bottom support system of the middle plate of the first negative floor and shrink the hanging rod to the position of the hole in the top plate;

[0022] A top plate bottom support system is set up at the lower part of the hanging rod, a template system distribution beam is set up on the top plate bottom support system, and then a top plate template system is set up;

[0023] A reinforcement layer for the roof holes is applied on the roof formwork system.

[0024] As a preferred design, after the reinforcement layer of the top plate holes is constructed, the bottom support system of the top plate is removed, and the installed Bailey beam lifting bracket and supporting hanging rod mechanism are removed.

[0025] The Bailey beam hoisting bracket and the supporting hanging rod mechanism of the present invention are simple to construct, easy to dismantle, and have high construction efficiency. They can be used for carrying loads at multiple hanging points and can be appropriately adjusted according to the size of the casting hole. The construction process is safe and controllable.

[0026] As a preferred design, N is a natural integer less than or equal to 3. For example, N is 3, 2, or 1.

[0027] As a preferred design, the Bailey beam hoisting bracket includes a Bailey beam support and a Bailey beam. The Bailey beam support is installed on the top plate of the hole and the Bailey beam is erected. The Bailey beam structure is used for hoisting, and its installation and removal are simple and the construction efficiency is high. The Bailey beam support can be installed on the upper part of the hole edge ring beam, and the Bailey beam can adopt a 321 type Bailey beam.

[0028] As a preferred design, the supporting hanging bar mechanism includes an I-beam, a channel steel, and a hanging bar. The I-beam is fully welded on the upper part of the Bailey beam, and the channel steel is fully welded on the upper part of the I-beam. The channel steel is inverted on the I-beam, and the hanging bar is fixed on both sides of the lifting lugs of the channel steel. The hanging bar is hung to the lower part of the hole. The hanging bar can be a Ф32 high-strength fine-rolled hanging bar and is fixed to both sides of the lifting lugs of the No. 40 channel steel by drilling and bolting. The Ф32 high-strength fine-rolled hanging bar is hung to the lower part of the hole.

[0029] As a preferred design, the I-beam is No. 45 I-beam, and the channel steel is No. 40 channel steel;

[0030] And / or, a tensioner is installed on the suspension rod to adjust the tightness of the suspension rod, and the tensioner is installed at intervals.

[0031] The tensioner in the present invention can be a heavy-duty malleable cast iron turnbuckle screw tensioner, which is used to adjust the tightness of the suspension rod to ensure construction safety.

[0032] As a preferred design, the bottom support system includes bottom channel steel and bottom I-beam, the bottom channel steel also uses No. 40 channel steel, and the bottom I-beam uses No. 45 I-beam. The bottom channel steel is connected to the lower part of the suspension bar, the bottom I-beam is fully welded in the bottom channel steel groove, and the I-beam distribution beam is laid on the bottom I-beam as the template system distribution beam.

[0033] As a preferred design, the formwork system includes channel steel main ribs, square wood secondary ribs, and plywood. The channel steel main ribs are laid on the upper part of the bottom I-beam, the square wood secondary ribs are laid on the upper part of the channel steel main ribs, and the plywood is laid on the upper part of the square wood secondary ribs.

[0034] As a preferred design, a pre-buried pipe is arranged at the position of the hole of the suspension bar, and the pre-buried pipe is removed and poured with high-grade concrete in the later stage. Preferably, the pre-buried pipe is a conical pre-buried pipe.

[0035] In the present invention, the design of the above-mentioned Bailey beam lifting bracket, supporting hanging rod mechanism, bottom bracket system and template system replaces the traditional full-height steel pipe bracket system to carry out the blocking operation of the shield hole of the station main body, realizes the position of the lifting point and the uniform distribution of force, ensures the stability of the lifting in the whole construction process, and makes the materials dismantled, and all the materials involved can be recycled, reducing the construction cost and the waste generated by related construction, and effectively promoting environmental protection.

[0036] Compared with the prior art, the present invention has the following advantages and beneficial effects:

[0037] 1. The shield hole plugging of the present invention is carried out after the shield construction of the existing station is completed. There is no support and no disturbance, which minimizes the impact on the track area and electromechanical decoration construction. Construction can be carried out all day, and construction at the same time saves construction time.

[0038] 2. Bailey beam hoisting uses multiple lifting points to coordinate the load-bearing and is appropriately adjusted according to the size of the casting holes, ensuring a safe and controllable construction process.

[0039] 3. The hoisting is done from the second or third floor upwards layer by layer. All materials involved can be recycled, which reduces construction costs and waste generated by related construction, and effectively promotes environmental protection. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] In order to more clearly illustrate the technical solutions of the exemplary embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments. It should be understood that the following drawings only illustrate certain embodiments of the present invention and should not be regarded as limiting the scope. For those of ordinary skill in the art, other relevant drawings can be obtained based on these drawings without creative work. In the drawings:

[0041] Figure 1 It is a structural schematic diagram of the Bailey beam lifting bracket and the supporting hanging rod mechanism in the construction method of the present invention.

[0042] Figure 2 It is a transverse cross-sectional view of the hole plugging of the negative second floor middle plate in the embodiment.

[0043] Figure 3 It is a longitudinal cross-sectional view of the hole plugging of the negative second floor middle plate in the embodiment.

[0044] Figure 4 It is a transverse cross-sectional view of the hole plugging of the negative layer middle plate in the embodiment.

[0045] Figure 5 It is a longitudinal cross-sectional view of the hole plugging of the negative layer middle plate in the embodiment.

[0046] Figure 6 It is a transverse cross-sectional view of the top plate hole sealing in the embodiment.

[0047] Figure 7 It is a longitudinal cross-sectional view of the top plate hole plugging in the embodiment.

[0048] Marks and corresponding parts names in the attached drawings:

[0049] 1- Bailey beam support, 2- Bailey beam, 3- I-beam, 4- Channel steel, 5- Hanger, 6- Tensioner, 7- Bottom I-beam, 8- I-beam distribution beam, 9- Square timber secondary rib, 10- Plywood, 11- Embedded pipe, 12- Cast-in-place reinforced concrete, 13- Channel steel main rib. DETAILED DESCRIPTION

[0050] In order to make the objectives, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with embodiments and drawings. The exemplary embodiments of the present invention and their description are only used to explain the present invention and are not intended to limit the present invention.

[0051] In the following description, a large number of specific details are set forth in order to provide a thorough understanding of the present invention. However, it is apparent to one of ordinary skill in the art that these specific details are not necessarily employed to practice the present invention. In other embodiments, in order to avoid obscuring the present invention, well-known structures, circuits, materials, or methods are not specifically described.

[0052] Throughout the specification, references to "one embodiment," "an embodiment," "an example," or "an example" mean that a particular feature, structure, or characteristic described in conjunction with the embodiment or example is included in at least one embodiment of the present invention. Therefore, the phrases "one embodiment," "an embodiment," "an example," or "an example" appearing in various places throughout the specification do not necessarily all refer to the same embodiment or example. In addition, particular features, structures, or characteristics may be combined in one or more embodiments or examples in any suitable combination and / or sub-combination. In addition, it will be appreciated by those of ordinary skill in the art that the figures provided herein are for illustrative purposes and that the figures are not necessarily drawn to scale. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0053] In the description of the present invention, the directions or positional relationships indicated by terms such as “front”, “rear”, “left”, “right”, “up”, “down”, “vertical”, “horizontal”, “high”, “low”, “inside” and “outside” are based on the directions or positional relationships shown in the accompanying drawings and are only for the convenience of describing the present invention and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they should not be understood as limiting the scope of protection of the present invention.

[0054] Embodiment 1:

[0055] This embodiment takes the sealing of holes in two underground floors as an example to illustrate the specific shield hoisting hole sealing construction method.

[0056] Follow the steps below;

[0057] Step 1: After the shield tunnel construction is completed, the holes in the station are sealed according to the requirements, and the Bailey beam hoisting bracket is built on the top plate of the hole. Specifically, Bailey beam support 1 is installed on the top plate of the hole and Bailey beam 2 is erected. Bailey beam support 1 is installed on the upper part of the hole edge ring beam. Bailey beam 2 adopts 321 type Bailey beam, such as Figure 1 shown.

[0058] Step 2: Seal the holes in the middle plate of the negative second floor and build the supporting suspension rod mechanism, specifically: fully weld No. 45 I-beam 3 on the top of Bailey beam 2, fully weld No. 40 channel steel 4 on the top of I-beam 3, and channel steel 4 is inverted on I-beam 3, and Ф32 high-strength fine-rolled suspension rod 5 is fixed to both sides of the lifting ears of No. 40 channel steel 4 by drilling and bolting, and Ф32 high-strength fine-rolled suspension rod 5 is hung to the bottom of the hole, and heavy-duty malleable cast iron basket screw tensioner 6 is installed at each interval on the suspension rod 5 to adjust the tightness of the suspension rod 5 to ensure construction safety.

[0059] Construction of the bottom support system of the negative second floor middle plate: fix the No. 40 bottom channel steel 4 at the lower part of the suspension rod 5 and fix it on both sides of the lifting ears of the No. 40 bottom channel steel 4 with bolts, fully weld the No. 45 bottom I-beam 7 in the groove of the No. 40 bottom channel steel 4 as the main beam, and then lay the No. 20 I-beam distribution beam 8 on the upper part of the No. 45 bottom I-beam 7, and this distribution beam serves as the distribution beam of the formwork system.

[0060] Formwork system construction: channel steel main rib 13 is laid on the upper part of No. 20 I-beam distribution beam 8, 100*100mm square wood is laid on the upper part of channel steel main rib 13 as the secondary rib of the formwork system, which is square wood secondary rib 9, plywood 10 is laid on the upper part of square wood secondary rib 9 as the pre-formwork for concrete pouring, conical embedded pipe 11 is placed at the position of the hole of hanging bar 5 (it will be removed and high-grade concrete will be poured later), and the steel bars and concrete of the holes in the middle plate of the negative second floor are applied to form cast-in-place reinforced concrete 12, such as Figure 2 , Figure 3 shown.

[0061] Step 3: Blocking holes in the negative layer middle plate:

[0062] After the reinforced concrete construction of the middle slab of the second negative floor is completed, the bottom support system of the middle slab of the second negative floor is removed, and the hanging rod 5 is retracted to the hole position of the first negative floor;

[0063] Construction of the bottom support system of the middle plate of the first negative floor: fix the No. 40 bottom channel steel 4 on both sides of the lifting ears of the No. 40 bottom channel steel 4 with bolts at the lower part of the suspension rod 5, place and fully weld the No. 45 bottom I-beam 7 in the groove of the No. 40 bottom channel steel 4, and then fully weld the No. 20 I-beam distribution beam 8 on the upper part of the No. 45 bottom I-beam 7 as the distribution beam of the formwork system.

[0064] Formwork system construction: channel steel main rib 13 is laid on the top of No. 20 I-beam distribution beam 8, 100*100mm square wood is laid on the channel steel main rib 13 as the secondary rib of the formwork system, plywood 10 is laid on the top of the square wood secondary rib 9 as the pre-formwork for concrete pouring, conical embedded pipe 11 is placed at the position of the hole of the hanging bar 5 (it will be removed later and high-grade concrete will be poured), and the steel bars and concrete of the holes in the middle plate of the negative first floor are applied, such as Figure 4 , 5 shown.

[0065] Step 4: Sealing the holes in the roof:

[0066] After the reinforced concrete construction of the first-basement middle slab is completed, the bottom support system of the first-basement middle slab is removed, and the hanging rod 5 is retracted to the position of the top slab hole.

[0067] The bottom support system of the top plate is constructed by fixing the No. 40 bottom channel steel 4 on both sides of the lifting ears of the No. 40 bottom channel steel 4 with bolts at the lower part of the suspension rod 5, placing and fully welding the No. 45 bottom I-beam 7 in the groove of the No. 40 bottom channel steel 4, and then fully welding the No. 20 I-beam distribution beam 8 on the upper part of the No. 45 bottom I-beam 7 as the distribution beam of the formwork system.

[0068] Construction of the top plate formwork system: lay the channel steel main rib 13 on the top of the No. 20 I-beam distribution beam 8, lay 100*100mm square wood on the top of the channel steel main rib 13 as the secondary rib of the formwork system, lay plywood 10 on the square wood secondary rib 9 as the pre-formwork for concrete pouring, place conical embedded pipes 11 at the position of the holes of the hanging rod 5 (removed later and poured with high-grade concrete), and apply the steel bars and concrete of the top plate holes, such as Figure 6 , 7 shown.

[0069] Step 5: After the top plate reinforced concrete construction is completed, the bottom support system of the top plate is removed, the Bailey beam installed on the top plate and the I-beam and channel steel 4 on the top are removed, and the Bailey beam support 1 is removed. At this point, the hole plugging construction is completed.

[0070] If deeper holes need to be sealed, follow the above steps, first build a Bailey beam lifting support system on the top plate, and then build the bottom support system and formwork system from the bottom layer. After each layer of steel bars and concrete pouring is completed, the bottom support system of that layer will be removed, and the bottom support system and formwork system of the next layer will be installed. This cycle will be repeated until the holes in the top plate are sealed. After the steel bars and concrete pouring of the top plate are completed, the Bailey beam lifting support system will be finally removed.

[0071] In this embodiment, due to the Bailey beam hoisting method, after each layer of holes is blocked, the bottom bracket system of the layer can be removed, and the suspension rod 5 can be retracted to the upper layer. The completed layer can resume track operation or electromechanical decoration construction, and the upper layer can be blocked at the same time, which greatly shortens the construction period, improves construction efficiency, and can also realize the exchange of hole blocking and electromechanical decoration construction, reducing costs. In addition, after the lower layer is blocked in this embodiment, the bottom bracket system can be removed. The bottom bracket system is not a scaffolding structure. In the traditional construction method, the scaffolding cannot be removed before the upper layer is capped. The bottom bracket system of the present invention is removable and easy to set up and dismantle, and takes a short time.

[0072] The method of the present invention is best used for sealing holes on the first underground floor, the second underground floor, and the third underground floor.

[0073] The above specific implementation methods further illustrate the objectives, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above are only specific implementation methods of the present invention and are not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A shield hoisting hole plugging construction method, characterized in that: The following steps are involved: Step 1: Set up the top hanging bracket system: A Bailey beam hoisting bracket is installed on the top plate of the hole in the station, and then a supporting hanging rod mechanism is installed on the Bailey beam hoisting bracket to hang the hanging rod (5) to the lower part of the hole; Step 2: Sealing holes in the negative N-layer middle plate: A negative N-layer middle plate bottom support system is set up at the lower part of the hanger bar (5), a template system distribution beam is set up on the bottom support system, and then a negative N-layer template system is set up; Applying a reinforcement layer for the holes in the plate of the negative N layer on the template system; Step 3: Sealing the holes in the negative N-1 middle plate: Remove the bottom support system of the negative N layer middle plate and shrink the suspension rod (5) to the hole position of the negative N-1 layer; According to the method in step 2, the negative N-1 layer bottom support system, the negative N-1 layer formwork system distribution beam, and the negative N-1 layer formwork system are sequentially erected until the reinforcement layer is applied; Step 4: When plugging the plate holes in the negative NL layer, repeat the process in step 3; L is a natural integer greater than or equal to 0, and L is less than N.

2. A shield hoisting hole plugging construction method according to claim 1, characterized in that: It also includes sealing the holes in the top plate after the reinforced concrete construction of the first negative floor is completed: Remove the bottom support system of the middle plate of the first negative floor and retract the suspension rod (5) to the position of the hole in the top plate; A top plate bottom support system is set up at the bottom of the hanger bar (5), a template system distribution beam is set up on the top plate bottom support system, and then a top plate template system is set up; A reinforcement layer for the roof holes is applied on the roof formwork system.

3. A shield hoisting hole plugging construction method according to claim 2, characterized in that: It also includes removing the bottom support system of the top plate after the reinforcement layer construction of the top plate holes is completed, and removing the installed Bailey beam lifting bracket and supporting hanging rod mechanism.

4. A shield hoisting hole plugging construction method according to any one of claims 1 to 3, characterized in that: The N is a natural integer less than or equal to 3.

5. A shield hoisting hole plugging construction method according to any one of claims 1 to 4, characterized in that: The Bailey beam hoisting bracket comprises a Bailey beam support (1) and a Bailey beam (2). The Bailey beam support (1) is installed on the top plate at the hole and the Bailey beam (2) is erected.

6. A shield hoisting hole plugging construction method according to claim 1, characterized in that: The supporting suspender mechanism comprises an I-beam (3), a channel steel (4), and a suspender (5). The I-beam (3) is fully welded on the upper part of the Bailey beam (2), the channel steel (4) is fully welded on the upper part of the I-beam (3), and the channel steel (4) is inverted on the I-beam (3). The suspender (5) is fixedly installed on both sides of the lifting ears of the channel steel (4), and the suspender (5) is hung to the lower part of the hole.

7. A shield hoisting hole plugging construction method according to claim 6, characterized in that: The I-beam is a No. 45 I-beam, and the channel steel (4) is a No. 40 channel steel; And / or, a tensioner (6) is installed on the suspension rod (5) for adjusting the tightness of the suspension rod (5).

8. A shield hoisting hole plugging construction method according to claim 1, characterized in that: The bottom support system comprises a bottom channel steel (4) and a bottom I-beam (7); the lower part of the hanger bar (5) is connected to the bottom channel steel (4); the bottom I-beam (7) is fully welded in the groove of the bottom channel steel (4); and an I-beam distribution beam (8) is laid on the bottom I-beam (7) as a template system distribution beam.

9. A shield hoisting hole plugging construction method according to claim 8, characterized in that: The template system comprises a channel steel main rib (13), a square timber secondary rib (9), and a plywood (10); the channel steel main rib (13) is laid on the upper part of the bottom I-beam (7); the square timber secondary rib (9) is laid on the upper part of the channel steel main rib (13); and the plywood (10) is laid on the upper part of the square timber secondary rib (9).

10. A shield hoisting hole plugging construction method according to any one of claims 7 to 9, characterized in that: A pre-buried pipe (11) is arranged at the position of the hole of the suspension bar (5), and the pre-buried pipe (11) is removed in the later stage and high-grade concrete is poured.

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