CN-116733034-B - Cover-excavation reverse construction method steel pipe column construction device and construction method

CN116733034BCN 116733034 BCN116733034 BCN 116733034BCN-116733034-B

Abstract

The invention discloses a steel pipe column construction device for a cover excavation reverse construction method, which comprises a horizontal positioning plate, a steel pile casing pressure head, a vertical protection head, a frame, a steel pile casing and a steel pipe column, wherein the frame is provided with the horizontal positioning plate, a plurality of groups of steel pile casing pressure heads and the vertical protection heads are arranged on the horizontal positioning plate, the steel pipe column can be led into the steel pile casing, the steel pile casing pressure head is arranged at the circumferential position of the steel pile casing, the steel pile casing pressure head performs the operation of pulling and leading the steel pile casing, the vertical protection heads are arranged at the circumferential position of the steel pipe column, and can be close to or far from the outer wall of the steel pipe column, and can be propped against the outer wall of the steel pipe column when being close to the steel pipe column. The device has the advantages that the device can obtain a stable steel pipe column, can avoid the inclination deformation of the steel pipe column in the process of pulling out the steel casing, and ensures the verticality of the finally formed steel pipe column.

Inventors

ZHANG JUAN
YU DANNI
ZHANG YUNPING
ZHANG JIAQI
YANG TAO
LI LIN
Qin Qingsi
OU ZHIJIAN
HU JIE
MA CHUANG
ZHANG JUN
ZENG JIANHUI
WANG QINGCHENG
E Shaoyu
DENG XIAOGUO
Zhan Hongxue
Xiao Heliang
WU QILIN

Assignees

深圳市市政工程总公司

Dates

Publication Date: 20260508
Application Date: 20230704

Claims (8)

1. The steel pipe column construction device is characterized by comprising a horizontal positioning plate, a steel pile casing pressure head, a vertical protection head, a frame, a steel pile casing and a steel pipe column; The steel pipe column is led into the steel pile casing, the steel pile casing pressure head is arranged at the circumferential position of the steel pile casing, and the steel pile casing pressure head performs the operation of pulling out and leading in the steel pile casing; The steel pile casing pressure head comprises an arc-shaped combination plate, a driving block, a clamping cylinder and a pulling cylinder, wherein multiple groups of arc-shaped combination plates are arranged near the outer wall of the steel pile casing pressure head and are arranged at intervals along the length direction of the steel pile casing pressure head, the driving block is arranged on the inner side of the arc-shaped combination plate, a driving inclined plane is arranged on the driving block, a combining inclined plane is arranged on the inner side of the arc-shaped combination plate, the driving block moves in the vertical direction and enables the driving inclined plane to abut against the combining inclined plane, the clamping cylinder is arranged on the steel pile casing pressure head, the output end of the clamping cylinder is connected with the bottom end of the driving block, and the pulling cylinder is used for driving the steel pile casing pressure head to reciprocate in the vertical direction.
2. The top-down construction steel pipe column construction device according to claim 1, wherein the vertical protection head comprises a vertical protection roller, a roller frame, a vertical rail and a horizontal rail; the roller frame is provided with a vertical protection roller, and can slide on a vertical rail, the roller frame is connected with the vertical rail, and the bottom of the vertical rail is connected with a horizontal rail; one side of perpendicular protection roller and steel-pipe column outer wall contact is provided with the arc breach, and the inside straightness protection ball that is provided with of arc breach realizes supporting or separating with the steel-pipe column lateral wall through straightness protection ball.
3. The steel pipe column construction device for the top-down construction method of the cover excavation machine of claim 1, wherein an adjusting mechanism is arranged at the bottom of the steel pipe column, two ends of the steel pipe column are in a closed shape, a plurality of groups of anchor rods are arranged along the length direction of the steel pipe column, the anchor rods are arranged along the circumferential direction of the steel pipe column, one end of each anchor rod is hinged to the outer wall of the steel pipe column, the plurality of groups of anchor rods are respectively connected with the adjusting mechanism, and the adjusting mechanism drives the plurality of groups of anchor rods to be hinged; Grouting holes are formed in the pipe wall of the steel pipe column, multiple groups of grouting holes are formed in the grouting holes along the circumferential direction and the length direction of the steel pipe column, and grouting pipes are arranged in the grouting holes.
4. The steel pipe column construction device for top-down construction method of cover excavation according to claim 3, wherein a containing groove is formed in the length direction of the outer wall of the steel pipe column, one end of the anchor rod is hinged to the bottom of the containing groove, and the other end of the anchor rod extends to the upper end of the steel pipe column.
5. The steel pipe column construction device according to claim 4, wherein the adjusting mechanism comprises a poking rod and poking sliding blocks, the poking rod is arranged in the width direction of the accommodating groove and is arranged at two sides of the anchor rod, two ends of the poking rod are connected with the poking sliding blocks, The steel pipe column comprises a steel pipe column body, wherein a steel pipe column body is arranged at the upper end of the steel pipe column body, a closing pipe is arranged at the upper end of the steel pipe column body, a floating ring is arranged on the closing pipe, a poking sliding block arranged at the upper end of the steel pipe column body is arranged along the length direction of a containing groove, one end of the poking sliding block is abutted or separated from the floating ring, the closing pipe is connected with the upper end of the steel pipe column body through a conical ring, a driving inclined plane is arranged at the lower end of the floating ring, an abutting inclined plane is arranged at one end of the poking sliding block, extending out of the conical inclined plane of the conical ring, the driving inclined plane is abutted or separated from the abutting inclined plane, the driving inclined plane is abutted or separated from the conical inclined plane of the conical ring, a spring piece is arranged at one end of the poking sliding block, extending out of the conical inclined plane of the conical ring, and the other end of the spring piece is connected with the bottom of the containing groove.
6. The steel pipe column construction device for the top-down construction method of cover excavation according to claim 5, wherein an auxiliary sleeve is sleeved on the closing pipe, and the lower end of the auxiliary sleeve is abutted against the upper end of the floating ring; The inner wall of the steel pipe column body is provided with an avoidance groove, the avoidance groove is arranged along the length direction of the steel pipe column, the grouting pipe is arranged along the length direction of the avoidance groove, and the upper end of the grouting pipe extends out of the pipe orifice of the auxiliary sleeve; the lower end closing end of the steel pipe column is provided with a positioning cover which is fixed with the concrete pile table, and the frame is provided with a rotating unit which is used for driving the horizontal positioning plate to rotate.
7. The steel pipe column construction device for the top-down construction method of the cover excavation machine, which is disclosed in claim 2, is characterized in that a horizontal guide sliding rod and a horizontal synchronous screw rod are arranged on the vertical track, synchronous nuts are respectively arranged on the vertical tracks on two sides of the steel pipe column, the horizontal synchronous screw rod is matched with the synchronous nuts on the vertical track, the horizontal guide sliding rod and the horizontal synchronous screw rod are horizontally arranged in parallel with the vertical track, the screw thread screwing direction of the horizontal synchronous screw rod matched with the synchronous nuts on the vertical track is opposite, and one end of the horizontal synchronous screw rod is connected with a driving motor.
8. A top-down construction method of steel pipe column for cover-excavation, which is applied to the top-down construction method of steel pipe column for cover-excavation according to claim 6, characterized in that the top-down construction method of steel pipe column for cover-excavation comprises the following steps: S10, cleaning a construction basal plane, positioning a foundation pit position, digging a working channel, and constructing an underground continuous wall; s20, constructing the steel pipe column, determining the position of the steel pipe column, and after the horizontal positioning plate is arranged above the drilling hole, adjusting the levelness of the horizontal positioning plate and the verticality of the vertical protection head; s30, hoisting the steel pile casing into a steel pile casing pressure head, and vertically pressing the steel pile casing into a drill hole through the steel pile casing pressure head to realize installation construction of the steel pile casing; s40, cleaning sludge and water flow in the steel pile casing, then constructing a concrete pile table at the bottom of a drilled hole, guiding the steel pipe column into the steel pile casing after the concrete pile table is solidified and formed, and starting a vertical protection head to abut against the outer wall of the steel pipe column to keep the verticality of the steel pipe column; S50, hoisting the auxiliary sleeve into the steel casing, and enabling the lower end of the auxiliary sleeve to be abutted against the upper end of the floating ring so that a plurality of groups of anchor rods protrude out of the outer wall of the steel pipe column; s60, hoisting the reinforcement cage into the steel pipe column, and introducing concrete into the auxiliary sleeve; S70, when the concrete in the steel pipe column is initially set, starting a steel casing pressure head to pull out the upper end of the steel casing so as to gradually pull out the steel casing from the drill hole, and starting superfine concrete grouting equipment to inject concrete fine slurry into the grouting pipe during the pipe pulling operation so as to fill the concrete fine slurry into a gap on the outer wall and a gap inside the steel pipe column; s80, after the steel casing is pulled out until the concrete in the steel pipe column and the concrete outside are completely solidified and maintained; S90, excavating a foundation pit after all the steel pipe columns are formed, pouring a temporary supporting wall at the bottom of the foundation pit, and constructing a top plate; And S100, restoring the road above the top plate, and constructing a first layer of foundation and a second layer of foundation below the top plate according to a top-down cover-excavation reverse construction method.

Description

Cover-excavation reverse construction method steel pipe column construction device and construction method Technical Field The invention relates to the field of building construction, in particular to a steel pipe column construction device and a construction method adopting a cover-excavation reverse construction method. Background In the construction process of the subway station, the road traffic cannot be cut off for a long time due to other factors such as traffic, personnel and buildings, so that in the construction process of the subway station, a cover excavation method is generally adopted for construction operation, namely, construction of a cover plate is rapidly carried out at the position of a pit mouth of a foundation pit by constructing the foundation pit of the subway station, the traffic above the cover plate can be recovered in a short time after the construction of the cover plate is completed, and then soil excavation of each layer of the subway station and construction of a basic main body are carried out below the cover plate. The cover-excavation method is generally divided into two practical construction methods in practical application, comprising a cover-excavation reverse method and a cover-excavation forward method, wherein the main difference between the two construction methods is the difference between the construction sequence of the foundation pit excavation and the construction sequence of the main body of the building, the cover-excavation reverse method is to excavate the ground downwards to a certain depth, then seal the top, and the rest of lower engineering is constructed under the sealed top plate, namely excavating layer by layer from top to bottom and constructing the main body structure to the bottom plate. In the top-down construction method of cover excavation, the steel pipe column is used as a main stressed structural member of the cover excavation structure, vertical loads in a construction stage and a use stage can be borne, quite high requirements are put on the installation accuracy and the perpendicularity of the steel pipe column, particularly in large comprehensive transportation junction engineering, a steel pipe concrete column with large diameter and overlength is generally adopted, therefore, in subway station construction, the steel pipe column construction is the weight of the whole main body safety and construction operation safety, during actual steel pipe column construction, drilling operation is carried out through drilling equipment, drilling is supported through steel casing, hole cleaning operation is carried out in the steel casing, anti-pulling pile concrete is poured at the position of the hole bottom, the steel pipe column is inserted into the steel casing through hoisting equipment, so that the steel pipe column is abutted against a concrete table at the bottom in the drilling, then a steel reinforcement cage is hoisted into the steel pipe pile, after the concrete is solidified, the steel casing is hoisted out from the drilling through the pulling pipe equipment, and the final steel pipe column can be formed. In the construction method, in the process of guiding the actual steel pipe column into the drill hole, the requirement on the verticality of the steel pipe column is very high, in the prior art, the verticality of the steel pipe column can be generally adjusted by arranging an ultrasonic detector in the steel pipe column, however, in the actual operation process, the verticality detection of ultrasonic waves is generally carried out when the steel pipe column is guided into a steel pile casing, when a reinforcement cage is hoisted, the ultrasonic detector is required to be taken out, the verticality detection cannot be carried out, after concrete is poured into the steel pipe column, because after the steel pile casing is pulled out of the drill hole, a gap exists between the formed steel pipe column and the drill hole, the risk of incompact still exists, the collision to the steel pipe column is easily caused in the steel pile casing pulling process, the steel pipe column has a certain deflection risk, and in the deflection, because the concrete is poured, the adjustment cannot be carried out, and great hidden danger is generated for the construction of the whole steel pipe column. Disclosure of Invention In order to overcome the defects of the prior art, the invention provides a steel pipe column construction device adopting a cover-excavation reverse construction method, which can obtain a stable steel pipe column, can avoid the inclination deformation of the steel pipe column in the process of pulling out a steel casing and ensures the verticality of the finally formed steel pipe column. The technical scheme includes that the cover-digging reverse construction method steel pipe column construction device comprises a horizontal positioning plate, a steel pile casing pressure head, a vertical protection head, a frame, a steel p