Deep foundation pit engineering suspension protection deeply-buried pipeline and construction method

Abstract

The invention provides a deep foundation pit engineering suspension protection deeply-buried pipeline and a construction method. The construction method comprises the following steps: (1) top beam and pipeline excavation construction; (2) constructing a crown beam clamping section steel shelving bracket; (3) construction of the movable elevation-adjustable suspension bracket; (4) constructing a hoop placing device at the position of the support latticed column; (5) mounting a rail type limiting anti-rolling device at the bottom of the pipeline; (6) the pipeline is constructed by prearranging a shelving beam connecting piece through an enclosure structure; the top beam and the profile steel are tightly clamped, a stable supporting system is formed, and the construction load can be effectively borne; the lifting rod and the bottom support can move up and down by adjusting the brake control device, so that the construction flexibility is effectively improved, and rework caused by elevation deviation is reduced; the device can quickly adapt to construction sites of pipelines with different diameters, can effectively prevent the pipelines from rolling and displacing due to the precise limiting function, guarantees the stability of the pipelines during construction, and reduces the safety risk.

Description

Technical Field

[0001] The invention relates to the technical field of foundation pit engineering, and in particular to a deep foundation pit engineering suspended protection deep buried pipeline and a construction method. Background Art

[0002] With the acceleration of urbanization and the continuous advancement of construction technology, the span and depth of foundation pits have increased significantly, and more and more large-span and ultra-deep foundation pit projects have emerged. In the process of excavation and support of these deep foundation pits, it is inevitable to encounter problems with underground pipelines. If the pipelines are not properly protected, they will often cause cracking and damage to the pipelines, and even cause catastrophic consequences such as ground collapse, traffic interruption, and casualties, causing huge economic losses and serious social impacts. For large-diameter tap water pipes, rainwater and sewage pipelines, or pipelines that are closely related to the normal lives of residents and cannot be temporarily disconnected, or the cost of pipeline relocation is too high, in-situ protection measures have to be taken.

[0003] When it comes to crossing multiple sections of pipelines with a span of more than 20m and a buried depth of more than 5m, the existing technology cannot solve the contact and leakage problems between the pipe sections, and excessive suspension disturbance will affect the normal use of the pipeline. In addition, large-diameter rigid concrete pipelines have heavy weight and poor ability to resist deformation, and are prone to breakage at the joints, which significantly increases the difficulty of protection. Therefore, in order to meet the needs of engineering construction, improve the quality and efficiency of deep-buried pipeline protection construction in deep foundation pit projects, and reduce construction costs and risks, it is urgent to research and develop a construction method suitable for suspended protection of deep-buried pipelines in deep foundation pit projects. Summary of the invention

[0004] The object of the present invention is to provide a deep foundation pit engineering suspended protection deeply buried pipeline and construction method to solve the above-mentioned technical problems.

[0005] In order to solve the above technical problems, the present invention provides a construction method for suspending and protecting deeply buried pipelines in deep foundation pit engineering, comprising the following steps: Step 1: Excavation of the crown beam and pipeline: Excavate the foundation pit to the bottom of the pipeline, construct the crown beam on the top of the bored pile, and conduct partial excavation of the soil in the pit directly below the completed crown beam to form a local excavation line, excavate the pipeline and wrap the pipeline; Step 2: Construction of the crown beam clamping steel support bracket: The I-beam and the crown beam are connected and fixed by the crown beam clamping steel frame; Step 3: Construction of mobile height-adjustable suspension bracket: The support beam is hoisted to the upper part of the connecting steel plate on the I-beam, the upper part of the suspension rod is connected to the support beam through the vertically adjustable suspension rod connection device, and the lower part of the suspension rod is connected to the bottom bracket through the connecting bolts; Step 4. Construction of the hoop shelving device at the position of the supporting lattice column: A number of supporting lattice columns are symmetrically arranged as the supporting points for the supporting I-beams, and the supporting lattice columns and the I-beams are connected through the hoop connectors of the supporting lattice columns. Step 5. Installation of the track-type limit anti-rolling device at the bottom of the pipeline: Install an external protective layer for the pipeline on the periphery of the pipeline, and square protective boxes are arranged at intervals outside the external protective layer of the pipeline. The square protective boxes are installed on the bottom supports, and box limit blocks are installed on the bottom supports on both sides of the square protective boxes. Step 6. Construction of the preset shelving beam connecting piece for the pipeline through the retaining structure: The pipeline is provided with closely inserted steel profiles on both sides through the retaining structure.

[0006] The beneficial effects of the present invention are as follows: (1) The present invention adopts the technology of the crown beam clamping and fixing steel beam shelving bracket. The crown beam and the steel beam are tightly clamped to form a stable support system, which can effectively bear the construction load.

[0007] (2) The present invention adopts the technology of the mobile elevation-adjustable suspension bracket. The elevation-adjustable connecting device for the upper and lower of the suspender is connected with the supporting cross beam. The elevation-adjustable connecting device for the upper and lower of the suspender is connected with the braking control device through the connecting wire. By adjusting the braking control device, the up and down movement of the suspender and the bottom support can be realized, effectively improving the construction flexibility and reducing the rework caused by elevation deviation.

[0008] (3) The present invention adopts the track-type limit anti-rolling device at the bottom of the pipeline. The track type design is convenient for installation and movement, can quickly adapt to the construction sites of pipelines with different diameters, and the accurate limit function can effectively prevent the pipeline from rolling and displacement, ensuring the stability of the pipeline during construction, reducing the safety risk. At the same time, the device has a simple structure, is easy to operate, can be adjusted according to the pipeline specifications, has strong applicability, and greatly improves the construction efficiency and safety.

[0009] (4) The present invention adopts the hoop shelving device at the position of the supporting lattice column. 4 supporting lattice columns are symmetrically arranged as the supporting points for the supporting I-beams, and the supporting lattice columns and the I-beams are connected through the hoop connectors of the supporting lattice columns, effectively supporting the stability of the I-beam structure.

[0010] (5) The present invention adopts the preset shelving beam connecting piece for the pipeline through the retaining structure. The pipeline is provided with closely inserted steel profiles on both sides at the place where the pipeline passes through the retaining structure. The inner sides of the closely inserted steel profiles on both sides are connected through the connecting steel plates, and the outer sides of the closely inserted steel profiles are provided with 2 large-diameter construction method piles for water stop. The stable connection method enhances the integrity of the pipeline and the retaining structure, improves the structural stability, and effectively resists the external force impact. Description of the Drawings

[0011] Figure 1 It is a schematic cross-sectional structure diagram of the suspended and protected pipeline; Figure 2It is a schematic diagram of the pipeline protection structure; Figure 3 It is a schematic plan view of the suspended protection pipeline structure.

[0012] In the figure: 1 - support cross beam, 2 - I-beam, 3 - connecting steel plate on the I-beam, 4 - connecting steel plate under the I-beam, 5 - suspension rod, 6 - bottom support, 7 - connecting bolt, 8 - pipeline, 9 - external protection layer of the pipeline, 10 - square protection box, 11 - box limit block, 12 - anti-rolling arc plate, 13 - arc plate support frame, 14 - movable track of the arc plate support frame, 15 - limit block of the arc plate support frame, 16 - up and down adjustable connecting device for the elevation of the suspension rod, 17 - connecting wire, 18 - braking control device, 19 - capping beam, 20 - capping beam clamping steel frame, 21 - supporting lattice column, 22 - hoop connecting piece of the supporting lattice column, 23 - closely inserted steel section, 24 - connecting steel plate, 25 - large diameter construction method pile. Specific implementation manners

[0013] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art belong to the scope of protection of the present invention.

[0014] Those skilled in the art should understand that in the disclosure of the present invention, the orientation or positional relationship indicated by the terms "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, the above terms should not be construed as limiting the present invention.

[0015] It can be understood that the term "one" should be understood as "at least one" or "one or more". That is, in one embodiment, the number of an element can be one, while in other embodiments, the number of the element can be multiple. The term "one" should not be construed as a limitation on the number.

[0016] As Figures 1 - 3 described, the present invention provides a construction method for suspending and protecting a deeply buried pipeline in a deep foundation pit project, including the following steps: Step 1. Construction of the capping beam 19 and the excavation of the pipeline 8: The foundation pit is excavated to the bottom of the pipeline 8, the capping beam 19 is constructed on the top of the bored pile, the soil in the pit is locally excavated directly below the completed capping beam 19 to form a local excavation line, and the pipeline 8 is excavated and wrapped.

[0017] Step 2. Construction of the steel beam supporting bracket clamped by the capping beam 19: The I-beam 2 is composed of three spliced I-beams. The upper part of the I-beam 2 is connected through the upper connecting steel plate 3 of the I-beam, and the lower part of the I-beam 2 is connected through the lower connecting steel plate 4 of the I-beam. The I-beam 2 and the capping beam 19 are connected and fixed through the capping beam clamped steel frame 20.

[0018] Step 3. Construction of the mobile elevation-adjustable suspension bracket: The supporting cross beam 1 is hoisted and welded to the upper part of the upper connecting steel plate 3 of the I-beam. The upper part of the suspender 5 is connected to the supporting cross beam 1 through the up-and-down adjustable connection device 16 for the elevation of the suspender. The lower part of the suspender 5 is connected to the bottom support 6 through the connecting bolt 7. The up-and-down adjustable connection device 16 for the elevation of the suspender is connected to the braking control device 18 through the connecting wire 17. By adjusting the braking control device 18, the up-and-down movement of the suspender 5 and the bottom support 6 can be realized.

[0019] Among them, the up-and-down adjustable connection device 16 for the elevation of the suspender is internally provided with a motor. The suspender 5 passes through the position of the motor, and the output end of the motor is in threaded fit with the suspender 5, so that the output end of the motor rotates along the suspender 5 for lifting and lowering, thereby driving the bottom support 6 to move up and down by the suspender 5. The braking control device 18 can synchronously output signals to multiple up-and-down adjustable connection devices 16 for the elevation of the suspender through the connecting wire 17 to ensure that multiple suspenders 5 drive the bottom support 6 to lift and lower synchronously.

[0020] Step 4. Construction of the hoop resting device at the position of the supporting lattice column 21: 4 supporting lattice columns 21 are symmetrically arranged as the supporting points for the supporting I-beam 2, and the supporting lattice column 21 and the I-beam 2 are connected through the supporting lattice column hoop connecting piece 22.

[0021] Step 5. Installation of the bottom track type anti-rolling device for the pipeline 8: The external protective layer 9 of the pipeline is installed on the periphery of the pipeline 8. Square protective boxes 10 are arranged at intervals outside the external protective layer 9 of the pipeline. The arc plate support mobile track 14 is installed at the inner bottom of the square protective box 10. The arc plate support 13 is movably installed on the arc plate support mobile track 14. The anti-rolling arc plate 12 is installed on the arc plate support 13. The arc plate support 13 can move freely on the arc plate support mobile track 14 and is limited and fixed by the arc plate support limit block 15. The square protective box 10 is installed on the bottom support 6, and the box body limit blocks 11 are installed on the bottom support 6 on both sides of the square protective box 10.

[0022] Step 6. Construction of the preset resting beam connecting piece for the pipeline 8 through the retaining structure: The pipeline 8 is provided with closely inserted steel beams 23 on both sides of the pipeline 8 through the retaining structure. The inner sides of the two sides of the closely inserted steel beams 23 are connected through the connecting steel plate 24, and the outer sides of the closely inserted steel beams 23 are waterproofed by arranging 2 large-diameter diaphragm walls 25.

[0023] The described technology of the crown beam 19 clamping and fixing the steel beam shelving support includes: I-beam 2, upper connecting steel plate 3 of the I-beam, lower connecting steel plate 4 of the I-beam, crown beam 19, and crown beam clamping steel frame 20. The I-beam 2 is composed of three spliced I-beams 2. The upper part of the I-beam 2 is connected through the upper connecting steel plate 3 of the I-beam, and the lower part of the I-beam 2 is connected through the lower connecting steel plate 4 of the I-beam. The I-beam 2 and the crown beam 19 are connected and fixed through the crown beam clamping steel frame 20.

[0024] The described technology of the mobile elevation-adjustable suspension support includes: support crossbeam 1, upper connecting steel plate 3 of the I-beam, suspension rod 5, bottom support 6, connecting bolt 7, up-and-down elevation-adjustable connecting device 16 of the suspension rod, connecting wire 17, and braking control device 18. The support crossbeam 1 is hoisted and welded to the upper part of the upper connecting steel plate 3 of the I-beam. The upper part of the suspension rod 5 is connected to the support crossbeam 1 through the up-and-down elevation-adjustable connecting device 16 of the suspension rod. The lower part of the suspension rod 5 is connected to the bottom support 6 through the connecting bolt 7. The up-and-down elevation-adjustable connecting device 16 of the suspension rod is connected to the braking control device 18 through the connecting wire 17. Adjusting the braking control device 18 can realize the up-and-down movement of the suspension rod 5 and the bottom support 6.

[0025] The described bottom track type limit and anti-rolling device for the pipeline 8 includes: bottom support 6, pipeline 8, external pipeline protection layer 9, square protection box 10, box limit block 11, anti-rolling arc plate 12, arc plate support frame 13, movable track 14 for the arc plate support frame, and limit block 15 for the arc plate support frame. The external pipeline protection layer 9 is installed around the pipeline 8. The square protection boxes 10 are arranged at intervals outside the external pipeline protection layer 9. The movable track 14 for the arc plate support frame is installed at the inner bottom of the square protection box 10. The arc plate support frame 13 is installed on the movable track 14 for the arc plate support frame. The anti-rolling arc plate 12 is installed on the arc plate support frame 13. The arc plate support frame 13 can move freely on the movable track 14 for the arc plate support frame and is limited and fixed through the limit block 15 for the arc plate support frame. The square protection box 10 is installed on the bottom support 6, and the box limit blocks 11 are installed on the bottom support 6 on both sides of the square protection box 10.

[0026] The described hoop shelving device for the position of the support lattice column 21 includes: I-beam 2, support lattice column 21, and hoop connecting piece 22 for the support lattice column. Four support lattice columns 21 are symmetrically arranged as the support points for the support I-beam 2. The support lattice column 21 and the I-beam 2 are connected through the hoop connecting piece 22 for the support lattice column.

[0027] The described preset shelving beam connecting piece for the pipeline 8 through the retaining structure includes: pipeline 8, closely inserted steel section 23, connecting steel plate 24, and large-diameter construction method pile 25. The closely inserted steel sections 23 are arranged on both sides of the pipeline 8 at the position where the pipeline 8 passes through the retaining structure. The inner sides of the two closely inserted steel sections 23 are connected through the connecting steel plate 24, and the outside of the closely inserted steel section 23 is provided with 2 large-diameter construction method piles 25 for water stop.

[0028] The present invention is not limited to the above-described preferred embodiments. Any person can obtain other various forms of products under the inspiration of the present invention. However, no matter what changes are made in its shape or structure, as long as it has the same or similar technical solutions as this application, it falls within the protection scope of the present invention.

Claims

1. Construction method for suspending and protecting deeply buried pipelines in deep foundation pit engineering, characterized in that It includes the following steps: Step 1. Construction of the capping beam (19) and the pipeline (8): The foundation pit is excavated to the bottom of the pipeline (8), the capping beam (19) is constructed on the top of the bored cast-in-place pile, the soil in the pit is locally excavated directly below the completed capping beam (19) to form a local excavation line, and the pipeline (8) is excavated and wrapped; Step 2. Construction of the clamping steel support for the capping beam (19): The I-beam (2) and the capping beam (19) are connected and fixed through the capping beam clamping steel frame (20); Step 3. Construction of the mobile elevation-adjustable suspension support: The support cross beam (1) is hoisted and connected to the upper part of the connecting steel plate (3) on the I-beam. The upper part of the suspender (5) is connected to the support cross beam (1) through the suspender elevation up-and-down adjustable connecting device (16), and the lower part of the suspender (5) is connected to the bottom support (6) through the connecting bolt (7); Step 4. Construction of the hoop resting device at the position of the support lattice column (21): A number of support lattice columns (21) are symmetrically arranged as the support points for supporting the I-beam (2), and the support lattice column (21) and the I-beam (2) are connected through the support lattice column hoop connecting piece (22); Step 5. Installation of the track-type limit anti-rolling device at the bottom of the pipeline (8): The pipeline external protection layer (9) is installed on the periphery of the pipeline (8), square protection boxes (10) are arranged at intervals outside the pipeline external protection layer (9), the square protection boxes (10) are installed on the bottom support (6), and box body limit blocks (11) are installed on the bottom support (6) on both sides of the square protection box (10); Step 6. Construction of the preset resting beam connecting piece for the pipeline (8) through the retaining structure: The pipeline (8) is provided with closely inserted steel sections (23) on both sides of the pipeline (8) through the retaining structure; 2. The construction method for suspending and protecting deeply buried pipelines in deep foundation pit engineering according to claim 1, characterized in that: In Step 2, the I-beam (2) adopts a triple-spliced I-beam. The upper part of the I-beam (2) is connected through the upper connecting steel plate (3) of the I-beam, and the lower part of the I-beam (2) is connected through the lower connecting steel plate (4) of the I-beam; 3. The construction method for suspending and protecting deeply buried pipelines in deep foundation pit engineering according to claim 1, characterized in that: In Step 3, the suspender elevation up-and-down adjustable connecting device (16) is connected to the braking control device (18) through the connecting wire (17); 4. The construction method for suspending and protecting deeply buried pipelines in deep foundation pit engineering according to claim 1, characterized in that: In Step 5, an arc plate support mobile track (14) is installed at the inner bottom of the square protection box (10), an arc plate support (13) is movably installed on the arc plate support mobile track (14), an anti-rolling arc plate (12) is installed on the arc plate support (13), the arc plate support (13) can move freely on the arc plate support mobile track (14), and is limited and fixed through the arc plate support limit block (15); 5. The construction method for suspending and protecting deeply buried pipelines in deep foundation pit engineering according to claim 1, characterized in that: In Step 6, the inner sides of the closely inserted steel sections (23) on both sides are connected through the connecting steel plate (24), and the outside of the closely inserted steel sections (23) is provided with large-diameter construction method piles (25) for water stop; 6. The construction method for suspending and protecting deeply buried pipelines in deep foundation pit engineering according to claim 1, characterized in that: The suspender elevation up-and-down adjustable connecting device (16) is internally provided with a motor. The suspender (5) passes through the position of the motor, and the output end of the motor is in threaded fit with the suspender (5) so that the output end of the motor rotates along the suspender (5) for lifting and lowering; 7. A suspended protection deep-buried pipeline for deep foundation pit engineering, characterized in that: Obtained by constructing according to the construction method of the deep foundation pit project for suspending and protecting the deeply buried pipeline according to any one of claims 1-6.

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