CN-118166816-B - Assembled open caisson construction device and method

CN118166816BCN 118166816 BCN118166816 BCN 118166816BCN-118166816-B

Abstract

The application discloses an assembled open caisson construction device and method, and relates to the technical field of open caisson construction. The assembled open caisson construction device comprises a sinking control device and a prestressed anchor bar, wherein the prestressed anchor bar is used for being embedded in a prefabricated pipe piece, and the sinking control device is used for being connected with the prestressed anchor bar to lift or press down the prefabricated pipe piece. According to the assembled open caisson construction device, when the assembled open caisson construction device is used for construction, the sinking control device is connected with the prestressed anchor bars in the prefabricated pipe piece, so that the vertical displacement of a well wall structure can be restrained, the active adjustment and accurate control of sinking time, single sinking amplitude and sinking speed of the well wall are realized, the purpose of adjusting the sinking coefficient of the open caisson in the sinking process is achieved, the problems of sinking in a sudden manner, blocking manner and the like of the open caisson are effectively solved, and the sinking stability of the open caisson is improved.

Inventors

YANG CHAO
LI YANSONG
LIU WEIHUA
NIU ZHIXIANG
ZENG LINLIN
LUO LI
CHEN QI
WANG JIALIN

Assignees

中国五冶集团有限公司

Dates

Publication Date: 20260512
Application Date: 20240320

Claims (3)

1. The assembled open caisson construction device is characterized by comprising a sinking control device (1) and a pre-stress anchor bar (2), wherein the pre-stress anchor bar (2) is used for being pre-buried in a prefabricated pipe piece (3), and the sinking control device (1) is used for being connected with the pre-stress anchor bar (2) so as to lift or press down the prefabricated pipe piece (3); The lower end of the prefabricated pipe piece (3) is provided with a hand hole groove (31), the lower end of the prestress anchor rib (2) extends into the hand hole groove (31), and the upper end of the prestress anchor rib (2) extends out of the upper end of the prefabricated pipe piece (3) and forms a connecting end; The sinking control device (1) comprises a fixing frame (11), a lifting steel frame (12) and a lifting oil cylinder (13), wherein the lifting oil cylinder (13) is arranged between the fixing frame (11) and the lifting steel frame (12) and is used for driving the lifting steel frame (12) to move up and down, and the lifting steel frame (12) is used for being connected with the prestress anchor bars (2); The fixing frame (11) comprises a base (111), a chute column (112) fixed on the base (111) and a sliding rod (113) arranged on the chute column (112) and capable of moving up and down, the lifting oil cylinder (13) is arranged between the base (111) and the lifting steel frame (12), and the lifting steel frame (12) is connected with the sliding rod (113); a diagonal brace (114) is arranged between the base (111) and the chute column (112); The sinking control device (1) further comprises an oil cylinder protection barrel (14) which is vertically arranged and is provided with an opening at the lower end, a cylinder body of the lifting oil cylinder (13) is connected with the fixing frame (11), and a piston rod of the lifting oil cylinder (13) extends into the oil cylinder protection barrel (14) and is connected with the barrel bottom of the oil cylinder protection barrel (14); The pressure-lifting steel frame (12) is detachably connected with the prestress anchor bars (2) through a connecting seat (15); the connecting seat (15) comprises a lifting ring (151), an ear plate (152), an anchor backing plate (153) and an inserting rod (154), wherein the lifting ring (151) is sleeved with the ear plate (152) on the inserting rod (154), the lifting ring (151) is connected with the lifting steel frame (12), the ear plate (152) is connected with the anchor backing plate (153), and an anchor hole for the prestressed anchor bar (2) to pass through is formed in the anchor backing plate (153).
2. The fabricated open caisson construction device according to claim 1, wherein the fixture (11) further comprises a weight seat (115), the weight seat (115) being connected with the base (111).
3. An assembled open caisson construction method, characterized in that the assembled open caisson construction device according to claim 1 or 2 is used, comprising the following steps: s1, excavating first-layer soil, pouring a reinforced concrete ring beam (4) after the excavation is completed, hoisting a prefabricated cutting edge (5) to a preset position, and installing a plurality of sinking control devices (1) on the reinforced concrete ring beam (4) along the circumferential direction of the reinforced concrete ring beam; s2, installing a first section of prefabricated pipe piece (3) on the prefabricated cutting edge (5), connecting the prestressed anchor bars (2) in the prefabricated cutting edge (5) with the prestressed anchor bars (2) in the prefabricated pipe piece (3), connecting the sinking control device (1) with the upper ends of the prestressed anchor bars (2) in the prefabricated pipe piece (3), excavating a soil layer to a specified depth, and sinking the first section of well wall to the specified depth by using the sinking control device (1); S3, dismantling a connection structure between the sinking control device (1) and the prestressed anchor bars (2), controlling the sinking control device (1) to reset, installing the next prefabricated segment (3), connecting the prestressed anchor bars (2) between the two adjacent prefabricated segments (3), connecting the sinking control device (1) with the upper ends of the prestressed anchor bars (2) in the prefabricated segment (3) at the uppermost layer, excavating a soil layer to a specified depth, and sinking the next well wall to the specified depth by using the sinking control device (1); S4, repeating the step S3 until the construction of the well wall is completed.

Description

Assembled open caisson construction device and method Technical Field The application relates to the technical field of open caisson construction, in particular to an assembled open caisson construction device and method. Background The sinking coefficient of the open caisson is influenced by dead weight, side friction resistance and blade foot counter force, the sinking coefficient is too large, the problems of sudden sinking, deflection and the like are easy to occur, and the conditions of blocking and sinking difficulty are also likely to occur when the sinking coefficient is too small. In actual construction, the uncertainty of side friction resistance and blade foot counter force is larger due to complex and changeable stratum, and the sinking stability of the sinking well is directly affected. The conventional method for preventing the sinking of the open caisson is to arrange a transverse beam, a piece of stone and the like on the cutting edge to increase the counter force of the cutting edge, and the conventional method for preventing the sinking of the open caisson is to adopt sinking-assisting measures such as variable cross section, slurry cover, weight, air curtain and the like. Although the conventional auxiliary measures can realize the effective sinking of the open caisson, the accurate control of the sinking opportunity, the single sinking amplitude and the sinking speed cannot be realized, and the sinking instability of the open caisson is still large. Disclosure of Invention The application aims to provide an assembled open caisson construction device and method, which solve the problem of large instability of open caisson sinking. The technical scheme adopted for solving the technical problems is as follows: In a first aspect, an assembled open caisson construction device is provided, including sinking controlling means and prestressing force anchor muscle, prestressing force anchor muscle is used for pre-buried in prefabricated section of jurisdiction, sinking controlling means be used for with prestressing force anchor muscle is connected in order to carry or push down prefabricated section of jurisdiction. Further, a hand hole groove is formed in the lower end of the prefabricated pipe piece, the lower end of the prestress anchor rib extends into the hand hole groove, and the upper end of the prestress anchor rib extends out of the upper end of the prefabricated pipe piece and forms a connecting end. Further, the sinking control device comprises a fixing frame, a lifting steel frame and a lifting oil cylinder, wherein the lifting oil cylinder is arranged between the fixing frame and the lifting steel frame and used for driving the lifting steel frame to move up and down, and the lifting steel frame is used for being connected with the prestress anchor bars. Further, the fixing frame comprises a base, a runner column fixed on the base and a sliding rod arranged on the runner column and capable of moving up and down, the lifting oil cylinder is arranged between the base and the lifting steel frame, and the lifting steel frame is connected with the sliding rod. Further, a diagonal bracing is arranged between the base and the chute column. Further, the sinking control device further comprises an oil cylinder protection barrel which is vertically arranged and is provided with an opening at the lower end, a cylinder body of the lifting oil cylinder is connected with the fixing frame, and a piston rod of the lifting oil cylinder extends into the oil cylinder protection barrel and is connected with the barrel bottom of the oil cylinder protection barrel. Furthermore, the lifting steel frame is detachably connected with the prestress anchor bars through a connecting seat. Further, the connecting seat comprises a lifting ring, an ear plate, an anchor backing plate and a plug rod, wherein the lifting ring is sleeved with the ear plate and arranged on the plug rod, the lifting ring is connected with the lifting steel frame, the ear plate is connected with the anchor backing plate, and an anchor hole for the prestressed anchor bar to pass through is formed in the anchor backing plate. Further, the fixing frame further comprises a counterweight seat, and the counterweight seat is connected with the base. In a second aspect, there is provided a construction method of an assembled open caisson, which adopts the construction device of an assembled open caisson provided in the first aspect, comprising the following steps: s1, excavating first-layer soil, pouring a reinforced concrete ring beam after excavation, hoisting prefabricated cutting edges to preset positions, and installing a plurality of sinking control devices on the reinforced concrete ring beam along the circumferential direction of the reinforced concrete ring beam; S2, installing a first section of prefabricated pipe piece on the prefabricated cutting edge, connecting the prestressed anchor bars in the prefabricated cutting edge with the