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CN-117071613-B - Stabilizing device of tubular pile cofferdam and construction method thereof

CN117071613BCN 117071613 BCN117071613 BCN 117071613BCN-117071613-B

Abstract

The invention relates to the technical field of tubular pile cofferdams, in particular to a stabilizing device of a tubular pile cofferdam. This tubular pile cofferdam stabilising arrangement, including tubular pile, crossbeam and longeron, a plurality of tubular piles are all vertically inserted and are established on the mud face and parallel interval sets up into two rows, space between two calandria piles is cofferdam accommodation space, crossbeam parallel interval is provided with a plurality ofly, the bottom of a plurality of crossbeams is slotted along length direction and the mud face of embedding downwards of bottom notch, every crossbeam passes two rows of tubular piles simultaneously and is perpendicular with the extending direction in cofferdam accommodation space, two longerons set up respectively in cofferdam accommodation space extending direction's both sides, and the longeron extends along the extending direction of single row tubular pile, the longeron is connected with the crossbeam in the top of crossbeam, overlap joint fastener knot on the tubular pile is established at the top of longeron. The tubular pile cofferdam stabilizing device is low in cost and can enhance the stability of the cofferdam.

Inventors

  • ZHENG WEIHUA
  • HU CHUNXIA

Assignees

  • 上海勘测设计研究院有限公司

Dates

Publication Date
20260508
Application Date
20230821

Claims (9)

  1. 1. The utility model provides a stabilizing device of tubular pile cofferdam, its characterized in that includes tubular pile (1), crossbeam (2), longeron (3) and extension crossbeam (5), a plurality of tubular pile (1) are all vertically inserted and are established on mud face (7) and parallel interval sets up into two rows, and the space between two rows tubular pile (1) is cofferdam accommodation space (4), crossbeam (2) parallel interval sets up a plurality of, a plurality of the bottom of crossbeam (2) is slotted along length direction and bottom notch embedding mud face (7) downwards, every crossbeam (2) pass simultaneously two rows tubular pile (1) and with the extending direction of cofferdam accommodation space (4) is perpendicular, and two longeron (3) set up respectively in cofferdam accommodation space (4) extending direction's both sides, just longeron (3) are along the extending direction of single row tubular pile (1), longeron (3) are in the top of crossbeam (2) are connected, tubular pile fastener (1) are detained (11) and are set up in two on the crossbeam (4) are in the extending direction of two extension space (4) are in the extension space (4) is perpendicular to each (5) simultaneously, and each both ends of the length direction of the lengthened cross beam (5) are respectively connected with a steel wire rope hanging rope (6), and the free end of the steel wire rope hanging rope (6) is provided with a hanging buckle and is used as a hanging point when a grid structure formed by the longitudinal beam (3), the cross beam (2) and the lengthened cross beam (5) is lifted, and the steel wire rope hanging rope is fixed at a positioning tubular pile (8) and an enclosing purlin in a tensioning manner after the cofferdam is built.
  2. 2. A stabilizing device for a pipe pile cofferdam according to claim 1, characterized in that in a single row of said pipe piles (1), the spacing between adjacent pipe piles (1) is the same, and said cross beams (2) pass through the gaps between adjacent pipe piles (1).
  3. 3. The stabilizing device of the tubular pile cofferdam according to claim 1, characterized in that the cross beam (2) and the longitudinal beam (3) are equal in length, a plurality of mounting holes are formed in the cross beam (2) and the longitudinal beam (3) along the length direction according to the overlapping positions of the cross beam (2) and the longitudinal beam (3), and the longitudinal beam (3) is in threaded connection with the cross beam (2) through the mounting holes.
  4. 4. The stabilizing device of the tubular pile cofferdam according to claim 1, characterized in that the longitudinal beams (3) are arranged close to the tubular pile (1), and a gap is arranged between the longitudinal beams (3) and the tubular pile (1).
  5. 5. A method of constructing a tubular pile cofferdam, characterized by employing the stabilizing device of the tubular pile cofferdam as claimed in any one of claims 1 to 4, and comprising the steps of: s1, measuring topography of a cofferdam installation place, and determining the arrangement position of a tubular pile cofferdam stabilizing device according to the topography; S2, leveling the mud surface of the determined arrangement position of the tubular pile cofferdam stabilizing device, and determining the specification and the size of the tubular pile cofferdam stabilizing device according to the mud surface elevation of the leveled arrangement position; s3, manufacturing and installing the tubular pile cofferdam stabilizing device at the determined arrangement position according to the determined specification and size of the tubular pile cofferdam stabilizing device; s4, bamboo rows, impermeable films or geotextiles are paved on the two inner side walls and the inner bottoms of the cofferdam accommodating space (4), the upper part of the cofferdam accommodating space (4) is fixedly connected by an enclosing purlin and a pull rod, and then, the cofferdam is formed by filling soil into the cofferdam accommodating space (4).
  6. 6. The method of constructing a tubular pile cofferdam as set forth in claim 5, wherein in step S3, the steps of: s31, determining the depth of the pipe pile (1) inserted into the mud surface (7) according to the mud surface elevation of the arrangement position after leveling, dividing the pipe pile (1) into a mud lower section (12) and a mud upper section (13), and arranging a lap joint fastener (11) at the position of the pipe pile (1) close to the mud lower section (12); S32, arranging a plurality of cross beams (2) and two lengthened cross beams (5) in parallel at intervals, wherein two longitudinal beams (3) are symmetrically arranged at two ends of the cross beams (2), each cross beam (2) is simultaneously and vertically provided with two longitudinal beams (3), and the longitudinal beams (3) are connected with the cross beams (2) above the cross beams (2) to form a grid structure; S33, arranging the grid structure at the determined arrangement position of the tubular pile cofferdam stabilizing device, enabling the bottom of the cross beam (2) to be downwards embedded into the mud surface (7), arranging a plurality of tubular piles (1) at intervals in parallel into two rows, vertically inserting the tubular piles into the arrangement position, inserting the mud lower section (12) of each tubular pile (1) into the mud surface (7) at the arrangement position, buckling the lap joint fastener (11) at the top of the longitudinal beam (3), and enabling the single cross beam (2) to be positioned in a gap between the adjacent tubular piles (1) in the single row of tubular piles (1).
  7. 7. The method of constructing a tubular pile cofferdam according to claim 6, wherein in step S33, the arrangement position of the grid structure is determined at the determined arrangement position of the tubular pile cofferdam fixing device, four positioning tubular piles (8) are inserted diagonally on the mud surface (7) for positioning, then the grid structure is arranged at the determined arrangement position of the grid structure by using steel wire rope slings (6) and the mud surface (7) is embedded downwards in the bottom notch of the cross beam (2), and each of the elongated cross beams (5) is abutted against two of the positioning tubular piles (8) respectively, and then other tubular piles (1) are applied to the grid structure.
  8. 8. The method of constructing a tubular pile cofferdam according to claim 5, wherein in step S4, after filling the inside of the cofferdam accommodating space (4) with soil is completed, if the height of the cofferdam is lower than the design height, bagged soil is replenished on top of the cofferdam until the height of the cofferdam reaches the design height.
  9. 9. The method for constructing a tubular pile cofferdam according to claim 7, wherein in step S4, after filling the inside of the cofferdam accommodating space (4) with soil is completed, the steel wire rope sling (6) is fastened and fixed at the positioning tubular pile (8) and the surrounding purlin.

Description

Stabilizing device of tubular pile cofferdam and construction method thereof Technical Field The invention relates to the technical field of tubular pile cofferdams, in particular to a stabilizing device of a tubular pile cofferdam and a construction method of the tubular pile cofferdam by adopting the stabilizing device. Background With the rapid development of hydraulic engineering construction, more and more hydraulic buildings need to face complex construction conditions in the construction process, such as poor foundation conditions, and particularly severe conditions of deep silt layers exist at the lower parts of the buildings. And when a cofferdam is built in a large area in a lake area or a large-range cofferdam is built in a river, the influence of a deep silt stratum on the cofferdam structure is even more. The cofferdam structure is limited by various factors such as construction period, investment, flood discharge, navigation and surrounding environment requirements, the cofferdam structure not only meets the requirements of water blocking, ensures construction safety and is convenient to construct, shortens the construction time of cofferdam filling as far as possible, but also saves the investment as far as possible, occupies the area of a water area as far as possible on a section, and reduces the influence of flood discharge safety in the flood season. In the tubular pile cofferdam structure with smaller section, the cofferdam is often settled greatly because of the existence of a deep and weak silt layer on the lower foundation, and the stability requirement is difficult to meet, so that the length of the tubular pile is required to be lengthened, the section of the cofferdam is required to be increased, and a wider filling protection channel is filled in the inner side of the cofferdam to meet the stability and settlement requirement. However, the lengthening of the tubular pile length, the increase of the cofferdam section and the arrangement of the soil filling and protecting channel all increase the engineering cost of the cofferdam, and deviate from the guideline of saving investment as much as possible of the cofferdam structure. Disclosure of Invention In order to solve the technical problems, the invention provides a tubular pile cofferdam stabilizing device which is low in cost and can enhance cofferdam stability. The invention adopts the following technical scheme: The invention provides a fixing device of a tubular pile cofferdam, which comprises tubular piles, cross beams and longitudinal beams, wherein a plurality of tubular piles are vertically inserted on a mud surface and are arranged in two rows at intervals in parallel, a space between two tubular piles is a cofferdam accommodating space, the cross beams are arranged in a plurality of parallel intervals, bottoms of the cross beams are slotted along the length direction and are downwards embedded into the mud surface, each cross beam simultaneously penetrates through two rows of tubular piles and is perpendicular to the extending direction of the cofferdam accommodating space, two longitudinal beams are respectively arranged on two sides of the extending direction of the cofferdam accommodating space, the longitudinal beams extend along the extending direction of a single tubular pile, the longitudinal beams are connected with the cross beams above the cross beams, and lap fasteners on the tubular piles are buckled on the tops of the longitudinal beams. Preferably, the device further comprises two lengthened cross beams, wherein the two lengthened cross beams are symmetrically arranged at two ends of the extending direction of the cofferdam accommodating space, each lengthened cross beam simultaneously penetrates through two rows of tubular piles and is perpendicular to the extending direction of the cofferdam accommodating space, and two ends of the length direction of each lengthened cross beam are respectively connected with a steel wire rope hanging rope. Preferably, in a single row of piles, the spacing between adjacent piles is the same and the cross beam passes through the gap between adjacent piles. Preferably, the cross beam and the longitudinal beam are equal in length, a plurality of mounting holes are formed in the cross beam and the longitudinal beam along the length direction according to the lap joint positions of the cross beam and the longitudinal beam, and the longitudinal beam is in threaded connection with the cross beam through the mounting holes. Preferably, the stringers are disposed adjacent the tube stake with a gap therebetween. The invention also provides a construction method of the tubular pile cofferdam, which adopts the stabilizing device of the tubular pile cofferdam, and comprises the following steps: s1, measuring topography of a cofferdam installation place, and determining the arrangement position of a tubular pile cofferdam stabilizing device according to the topography; S2, leveling th