CN107191203A - It is a kind of it is adjustable control tunnel surrounding convergent deformation false stull device and apply method - Google Patents

Abstract

An adjustable temporary cross-bracing device and construction method for controlling the convergence and deformation of the tunnel surrounding rock, including a supporting steel pipe, a working chamber, a cylindrical jack, a wedge-shaped top angle, a longitudinal round steel, a reinforcing steel plate inside the pipe, a bolt, a fixed support, The U-shaped support, the lugs, and the studio are composed of upper and lower parts, the upper part is the top cover, and the cylindrical jack sliding in the fixed track is placed in the studio, and the cylindrical jack is supported by the U-shaped support for sliding; the studio Holes are opened at both ends, and the size of the opening is determined according to the size of the supporting steel pipe; the studio is made into a unit box, and each unit box is connected as a whole through the pin through the lug; the fixed support in the unit box supports the supporting round steel; The steel pipes on both sides are prestressed by the jack, and the two ends of the steel pipes support the foot of the tunnel steel arch frame, and the wedge-shaped top angle steel pipes are in good contact with the steel arch frame; in order to control the subsidence, longitudinal round steel is welded on the steel arch frame, Make it stuck; there is a reinforced steel plate inside the supporting steel pipe.

Description

An adjustable temporary cross-bracing device for controlling the convergent deformation of the surrounding rock of the tunnel and its construction method

technical field

The invention relates to an adjustable temporary cross-brace device and construction method for controlling the convergent deformation of the surrounding rock of the tunnel, and is especially suitable for the convergent deformation control of the large-deformed soft rock tunnel.

Background technique

With the rapid development of our country in the field of transportation construction, a large number of railway and highway tunnels have appeared. At the same time, more and more tunnels with high difficulty and high confining pressure have appeared in tunnel construction. The deformation control in construction is particularly important. important. For the control of convergent deformation, the three-step temporary inverted arch method is currently used more frequently in tunnel construction. The structure of the existing temporary inverted arch is to build arc-shaped steel frames on the steps according to a certain distance after the tunnel steps are formed, to support the foot of the steel frame for the initial support of the tunnel, and to seal it with shotcrete at the same time. The lateral convergence plays the role of supporting the top, and at the same time increases the stress area of the bottom, so that the control convergence has a good effect. However, because the tunnel construction requires fast circulation and fast closure, the temporary inverted arch method cannot be used for rapid construction with mechanical equipment, and the demolition process is relatively cumbersome. After construction, it is impossible to achieve fast conversion, and the steel after demolition is partially scrapped and cannot be used. This makes It is necessary to further improve it.

Contents of the invention

In order to solve the deficiencies in the above-mentioned background technology, an adjustable temporary brace device and construction method for controlling the convergence deformation of the surrounding rock of the tunnel are provided, which can effectively replace the temporary inverted arch to control the convergence deformation, increase the construction speed, and save materials .

The technical scheme adopted to realize the present invention is:

An adjustable temporary brace device and construction method for controlling the convergent deformation of the surrounding rock of the tunnel, including a supporting steel pipe (1), a working chamber (2), a cylindrical jack (3), a wedge-shaped top angle (4), a longitudinal circle steel (5), reinforced steel plate (6), latch (7), fixed support (8), U-shaped support (9), lugs (10), it is characterized in that: the studio (2) consists of two upper and lower The upper part is the top cover, and the cylindrical jack (3) sliding in the fixed track is placed in the working room (2). The cylindrical jack (3) is supported by a U-shaped support (9), and the jack can move along the track Sliding parallel to the working room (2); holes are opened at both ends of the working room, and the size of the opening is determined according to the size of the supporting steel pipe (1); the working room is made into a unit box, and each unit box passes through the lug through the pin (7) (10) Connected into a whole, easy to disassemble; the fixed support (8) in the unit box supports the supporting round steel (1); the jack applies prestress to the steel pipes on both sides, and the two ends of the steel pipe support the bottom of the tunnel steel arch At the foot, the steel pipe is in good contact with the steel arch frame through the wedge-shaped top angle (4); in order to control the sinking, a longitudinal round steel (5) is welded on the steel arch frame to make it stuck; the supporting steel pipe (1) is equipped with The steel plate (6) is reinforced inside the tube to ensure that it has a certain rigidity.

Compared with the existing temporary braces, the advantages and effects of the temporary braces are as follows:

1. The invention is easy to assemble and disassemble, and can be circulated quickly, which can improve the construction progress.

2. The invention has good integrity, applies prestress to the initial support and surrounding rock through step-by-step pressurization and force transfer, and achieves the effect of adjusting the pressure of the cross brace and controlling the convergent deformation of the surrounding rock of the tunnel.

3. The invention is more economical and reasonable, replaces the phenomenon that the existing structure cannot be recycled after being dismantled after use, not only reduces the engineering cost, but also saves construction time.

Description of drawings

Fig. 1 adjusts the front elevation of the present invention;

Fig. 2 elevation view after adjustment of the present invention;

Fig. 3 is the structural representation inside the control room of the present invention;

Fig. 4 Fig. 2A-A section view

detailed description

An adjustable temporary brace device and construction method for controlling the convergent deformation of the surrounding rock of the tunnel, including a supporting steel pipe (1), a working chamber (2), a cylindrical jack (3), a wedge-shaped top angle (4), a longitudinal circle steel (5), reinforced steel plate (6), bolt (7), fixed support (8), U-shaped support (9), lug (10), it is characterized in that: working room (2) consists of upper and lower two The upper part is the top cover, and the cylindrical jack (3) sliding in the fixed track is placed in the working room (2). The cylindrical jack (3) is supported by a U-shaped support (9), and the jack can move along the track Sliding parallel to the working room (2); holes are opened at both ends of the working room, and the size of the opening is determined according to the size of the supporting steel pipe (1); the working room is made into a unit box, and each unit box passes through the lugs through bolts (7) (10) Connected into a whole, easy to disassemble; the fixed support (8) in the unit box supports the supporting round steel (1); the jack applies prestress to the steel pipes on both sides, and the two ends of the steel pipe support the bottom of the tunnel steel arch At the foot, the steel pipe is in good contact with the steel arch frame through the wedge-shaped top angle (4); in order to control the sinking, a longitudinal round steel (5) is welded on the steel arch frame to make it stuck; the supporting steel pipe (1) is equipped with The steel plate (6) is reinforced inside the tube to ensure that it has a certain rigidity.

Working principle: the studio is made into a unit box, and each unit box is connected as a whole by bolts, which is easy to disassemble; through the studio, the jack and the supporting steel pipe are well combined into a whole; pressurized by the jack, so that both ends of the steel pipe are supported At the foot of the steel arch of the tunnel; through the wedge-shaped top angle, the steel pipe is in good contact with the steel arch; in order to control the subsidence, a longitudinal round steel is welded on the steel arch to lock the steel pipe; the tunnel is controlled by adjusting the pressure of the jack Convergent deformation of surrounding rock.

Claims (1)

1. An adjustable temporary cross bracing device and construction method for controlling the convergence and deformation of tunnel surrounding rock, including supporting steel pipes (1), working chambers (2), cylindrical jacks (3), wedge-shaped top angles (4), Longitudinal round steel (5), reinforced steel plate (6), bolt (7), fixed support (8), U-shaped support (9), lugs (10), characterized in that: the studio (2) consists of It consists of upper and lower parts, the upper part is the top cover, and the cylindrical jack (3) is placed in the working room (2) and slides in the fixed track. The cylindrical jack (3) is supported by the U-shaped support (9). The jack can Slide along the track parallel to the working room (2); holes are opened at both ends of the working room, and the size of the opening is determined according to the size of the supporting steel pipe (1); the working room is made into a unit box, and each unit box passes through the bolt (7) The lugs (10) are connected as a whole, which is easy to disassemble; the fixed support (8) in the unit box supports the supporting round steel (1); the jack applies prestress to the steel pipes on both sides, and the two ends of the steel pipe support the tunnel steel arch At the foot of the frame, the steel pipe is in good contact with the steel arch through the wedge-shaped top angle (4); in order to control the subsidence, a longitudinal round steel (5) is welded on the steel arch to make it stuck; the inside of the supporting steel pipe (1) A reinforced steel plate (6) is provided in the pipe to ensure that it has a certain rigidity.