CN206001106U - A kind of attachment means between underground engineering jacking construction combined type jacking steel pipe - Google Patents

Abstract

A connection device between combined jacking steel pipes for pipe jacking construction in underground engineering, comprising a jacking steel pipe, a female fastener and a sub-fastener are provided in the middle of the jacking steel pipe, and the female fastener and the sub-fastener are in the middle of the jacking steel pipe Symmetrically arranged, the female fasteners and sub-fasteners between adjacent jacking steel pipes are arranged oppositely. When the female fasteners and sub-fasteners are connected, the sub-fasteners bite each other. Set up a set of upper connecting flange plate and lower connecting flange plate, set a set of connecting holes at the upper end and lower end 2/5R of the jacking steel pipe, and connect the upper connecting rod and the lower connecting rod in the connecting hole. The bottoms of the connecting rods and the lower connecting rods are provided with erecting steel pipes arranged horizontally. It solves the effective control of connection accuracy, quantity and connection quality when the connection construction is carried out in the narrow space inside the pipe, increases the stiffness of the initial support, avoids the problem of offset phenomenon, and reduces the danger and deformation overrun. It has the characteristics of fast construction speed, simple operation and low cost.

Description

A connection device between combined jacking steel pipes for pipe jacking construction in underground engineering

technical field

The utility model relates to a connection device between combined jacking steel pipes for underground engineering pipe jacking construction.

Background technique

With the rapid development and construction of pipe jacking construction in underground engineering, new pipe jacking construction techniques are constantly emerging, and pipe jacking materials have increased significantly. It is an inevitable construction process for pipe connections in large-diameter steel pipe group pipe projects. During the construction period, the connection method, material and connection effect cannot be guaranteed. When the connection construction is carried out in the narrow space inside the pipe, it is difficult to control the connection accuracy, quantity and connection quality, and it is difficult to verify after the construction is completed, which makes it difficult to remedy the damage, which affects the later structural construction and safety, and is not conducive to the construction progress and quality. and benefit control.

Utility model content

The purpose of the utility model is to provide a combined jacking connection device between steel pipes in underground engineering pipe jacking construction, which solves the problem of effective control of connection precision, quantity and connection quality during connection construction in a small space inside the pipe, and increases the The rigidity of the initial support avoids the problem of offset phenomenon and reduces the danger and deformation overrun. It has the characteristics of fast construction speed, simple operation and low cost.

The technical solution adopted to achieve the above purpose includes jacking steel pipes, and the middle part of the jacking steel pipes is provided with female fasteners and sub-fasteners. The female fasteners and sub-fasteners are arranged in opposite directions. When the female fasteners and sub-fasteners are connected, the sub-fasteners engage with each other. A set of upper connecting flange plates are respectively set at the upper and lower ends of the jacking steel pipe at 1/5R. and the lower connecting flange plate, a set of connecting holes are respectively set at the upper end and lower end of the steel pipe at 2/5R, and the connecting holes are connected with the upper connecting rod and the lower connecting rod, and the upper connecting rod and the lower connecting rod The bottom is provided with erecting steel pipes arranged horizontally.

Beneficial effect

Compared with the prior art, the utility model has the following advantages.

1. Increase the stiffness of the initial support to control the ground settlement and control the additional impact of the temporary support removal process;

2. It can adapt to the situation of buried depth, improve the use function and reduce the overall cost of the project;

3. The materials used are simple and easy to operate. During the construction process, the procedures are simplified, the progress is accelerated, and it can be ensured that it will not be damaged in the subsequent construction, which can ensure the construction progress and ensure the construction quality at the same time, increasing safety. reliability.

Description of drawings

Below in conjunction with accompanying drawing, the utility model is described in further detail.

Figure 1 is a schematic front view of the structure of the device;

Figure 2 is a schematic top view of the structure of the device;

Figure 3 is a schematic longitudinal sectional view of the structure of the device.

detailed description

The device includes a jacking steel pipe, as shown in Figure 1, Figure 2, and Figure 3, the middle part of the jacking steel pipe is provided with a female fastener 1 and a sub-fastener 2, and the female fastener 1 and the sub-fastener 2 are installed on the jacking steel pipe. The central part is symmetrically arranged, and the female fastener 1 and the sub-fastener 2 between adjacent jacking steel pipes are arranged oppositely. A set of upper connecting flange plate 3 and a lower connecting flange plate 4 are respectively set at 1/5R, and a set of connecting holes are respectively set at the upper end and lower end of the jacking steel pipe at 2/5R, and the upper connecting rods 5 and the lower connecting rods are connected in the connecting holes. The connecting rods 6 are connected, and the bottoms of the upper connecting rod 5 and the lower connecting rod 6 are provided with erecting steel pipes 7 arranged horizontally.

The upper connecting flange plate 3 and the lower connecting flange plate 4 are welded and connected with adjacent jacking steel pipes up and down in a staggered manner, and the lap joint is firm.

Example

The device comprises a female fastener 1 , a sub-fastener 2 , an upper connecting flange 3 , a lower connecting flange 4 , an upper connecting rod 5 and a lower connecting rod 6 . As shown in Figure 1, Figure 2, and Figure 3, a female fastener 1 and a child fastener 2 are provided in the middle of the jacking steel pipe, and a set of upper connecting flange plates 3 and lower connecting flanges are respectively provided at the upper and lower ends of the jacking steel pipe at 1/5R. Flange plate 4, a set of connection holes are set at the upper end and lower end 2/5R of the jacking steel pipe, connected by upper connecting rod 5 and lower connecting rod 6, and the upper and lower connecting rods are kept horizontal by erecting steel pipe 7.

The female fasteners 1 and the sub-fasteners 2 are symmetrically arranged in the middle of the jacking steel pipes, and the adjacent jacking steel pipes are arranged oppositely, and the female fasteners and the female fasteners bite each other when connected.

The upper connecting flange plate 3 and the lower connecting flange plate 4 are welded and connected with adjacent jacking steel pipes up and down in a staggered manner, and the lap joint is firm.

The upper connecting rod 5 and the lower connecting rod 6 are connected to the adjacent steel pipes through the holes between the jacking steel pipes, and the erecting steel pipes 7 are used to maintain the level, and the connecting rods are fixed with nuts.

The upper middle part of the jacking steel pipe is provided with a female fastener 1 and a sub-fastener 2. The female fasteners of adjacent jacking steel pipes are arranged oppositely. When connecting, the female fasteners bite each other, which can effectively control the deviation accuracy.

1. Connecting rod connection

(1) A set of connecting holes are respectively set at the upper end and the lower end 2/5R of the jacking steel pipe, and the upper connecting rod 5 and the lower connecting rod 6 are used for connection. During installation, the upper connecting rod 5 and the lower connecting rod 6 should freely penetrate in the hole, and the washer of the connecting rod is arranged on one side of the nut. The connecting rod should be inserted in the same direction, and the connecting rod should be tightened with a wrench. The fastening of the connecting rod is carried out twice, and the first time is the initial screwing. The initial tightening is 60%~80% of the standard axial force of the connecting rod (i.e. the design pretension). The second tightening is the final tightening. In order to make all the connecting rods in the connecting rod group evenly stressed, the initial tightening and final tightening are carried out in a certain order, and the tightening is performed from the middle of the upper and lower connecting rod groups to the outside.

(2) When the upper connecting rod 5 and the lower connecting rod 6 are installed, the erecting steel pipe 7 is used to maintain the horizontal position to ensure that the upper and lower connecting rods are on the same level. After the connection is completed, the erecting steel pipe 7 is welded on the connecting rod ;

(3) After the upper connecting rod 5 and the lower connecting rod 6 are installed, concrete is used to block the connecting holes to prevent the loss of concrete during pouring;

2. Wing connection

(1) A set of full-length upper connecting flange plates 3 and lower connecting flange plates 4 are respectively installed at the upper and lower ends of the jacking steel pipe at 1/5R. The overlapping length of adjacent flange plates is greater than 50 mm, which can effectively guide and The role of the connection between steel pipes;

(2) During the earthwork excavation of the main structure, the connecting flange plate 4 under the pipe jacking is welded synchronously to ensure the overall stability of the support system;

Through the above method, the precision of the jacking steel pipe can be effectively controlled to prevent excessive deviation, and the construction in a narrow space is simple and convenient, and the construction progress is fast. After the concrete is poured, the effective supporting strength effect is achieved to control the ground subsidence and increase the safety and reliability.

Claims (2)

1. attachment means between a kind of underground engineering jacking construction combined type jacking steel pipe, including jacking steel pipe, it is characterised in that Mother buckle is provided with the middle part of the jacking steel pipe（1）, sub-buckle part（2）, mother buckle（1）, sub-buckle part（2）Symmetrical in the middle part of jacking steel pipe Arrangement, the mother buckle between adjacent jacking steel pipe（1）, sub-buckle part（2）Opposed, mother buckle（1）, sub-buckle part（2）During connection Snap fastener is mutually twisted, and respectively sets connection flange plate on 1 group at the jacking steel pipe top and bottom 1/5R（3）With the lower connection wing Listrium（4）, at jacking steel pipe top and bottom 2/5R, respectively set 1 group of connecting hole, connection in the hole connection upper connecting rod part（5）, lower company Extension bar part（6）Connection, the upper connecting rod part（5）, lower connecting rod part（6）Bottom is provided with horizontally disposed erection steel pipe（7）.

2. attachment means between a kind of underground engineering jacking construction combined type jacking steel pipe according to claim 1, its are special Levy and be, the upper connection flange plate（3）, lower connection flange plate（4）Stagger with adjacent jacking steel pipe up and down and be welded to connect, overlap joint Firmly.