CN103195450B - Hydraulic pressure tunnel invert operation trolley and inverted arch construction method - Google Patents

Abstract

The invention discloses a hydraulic tunnel inverted arch operation trolley and an inverted arch construction method. The hydraulic tunnel inverted arch operation trolley includes a main beam, a plurality of templates and at least three rows of screw rods, and each template includes a first template and The second formwork, the first formwork and the second formwork are hinged, and the plurality of formworks are connected into a whole in a hinged manner; the upper end of the main beam is provided with two tailstocks, and the two ends of each tailstock are respectively connected to a lift The upper end of the oil cylinder is hinged, the lower ends of the two lifting oil cylinders are respectively hinged with the corresponding formwork, and two control frames are arranged on the main beam corresponding to the two tailstocks, the control frame is hinged with one end of the translation oil cylinder, and the other end of the translation oil cylinder is connected with the The lifting oil cylinders at the same end of the two tailstocks are hinged, the lower ends of the three rows of screw rods are respectively hinged at both ends and the middle of the template, and the upper ends are hinged on the main beam. The invention has simple operation, speeds up the construction progress of the tunnel invert and improves the construction quality of the invert.

Description

Hydraulic tunnel inverted arch operation trolley and inverted arch construction method

technical field

The invention relates to a hydraulic tunnel inverted arch operation trolley and an inverted arch construction method used in highway, water conservancy, and railway tunnel projects.

Background technique

The inverted arch is one of the main components of the tunnel structure, and it is the lining foundation commonly used in tunnel construction at present. On the one hand, it must effectively transmit the pressure of the upper formation of the tunnel and the load on the road surface to the underground through the tunnel side wall structure, and on the other hand, it must also effectively resist the reaction force from the lower formation, so the inverted arch has a great impact on the stability of the entire tunnel It plays a vital role. Therefore, the inverted arch construction of the tunnel has become an important link in the entire tunnel construction process, and in the inverted arch construction process, the inverted arch operation trolley is an indispensable construction equipment.

In the existing tunnel construction, the commonly used inverted arch operation trolley includes a truss beam, a number of formwork and screw rods, and each formwork is fixedly connected to each other to form a whole. In one piece, the vertical support stands on the ground or on the completed inverted arch to support and carry the entire inverted arch formwork. The two ends of the screw rod are respectively fixedly connected with the beam and the formwork, so that the entire formwork supports the formwork through the screw rod . Before the inverted arch formwork is installed, corresponding steel bars are placed at the position of the inverted arch, then the inverted arch formwork is installed, and the construction of the inverted arch is completed by pouring concrete below the template.

When using the above-mentioned inverted arch operation trolley to construct the inverted arch, since the various formworks are connected and integrated in a fixed connection, the formwork is difficult to locate when in use, and after the invert arch is constructed once, the formwork It needs to be disassembled and assembled as a whole to facilitate the next construction operation, so the labor input is large and the efficiency is low; in addition, the bearing capacity of the existing inverted arch formwork is not large enough, so that the length of the inverted arch in one construction is shorter and the extension The construction time of the inverted arch is shortened; and because the bearing capacity is not large enough, the entire inverted arch formwork is easily deformed during the inverted arch construction process, which greatly reduces the supporting effect on the formwork and easily causes the formwork to shift, thereby affecting the construction of the inverted arch after the quality.

Contents of the invention

In order to solve the above-mentioned technical problems, the present invention provides a hydraulic tunnel inverted arch operation trolley and an inverted arch construction method with simple operation, which not only improves the construction progress of the tunnel, but also improves the construction quality of the tunnel.

The technical solution adopted by the present invention is: a hydraulic tunnel inverted arch operation trolley, comprising a main beam, a plurality of templates and at least three rows of screw mandrels, each template includes a first template and a second template, the first template and the second template The second formwork is hinged, and a plurality of formworks are hingedly connected to form a whole; the main beam includes a crossbeam and a vertical support, and the crossbeam and the vertical support are fixedly connected as a whole; the upper end of the main beam is provided with two two tailstocks, the two ends of each tailstock are respectively hinged to the upper end of a lift cylinder, the lower ends of the two lift cylinders are respectively hinged to the corresponding formwork, and two control frames are arranged on the main beam corresponding to the two tailstocks, The control frame is hinged to one end of the translation cylinder, and the other end of the translation cylinder is hinged to the lifting cylinder at the same end of the two tailstocks. The lower ends of the three rows of screw rods are respectively hinged to the two ends and the middle of the template, and the upper ends are hinged to the main beam.

In the above-mentioned hydraulic tunnel inversion trolley, a through-beam is provided at the joint between the template and the screw rod, and the length of the through-beam is the sum of the lengths of all the templates.

In the hydraulic tunnel inverted arch operation trolley mentioned above, a front foot is provided on both sides of the front end of the main beam, each front foot includes an outrigger and a support, the outrigger is fixed on the front end of the main beam, and the support is set on the On the outside, pin holes are provided on the outriggers and the support, and are connected by pins; the lower end of the support is provided with a threaded base.

In the above-mentioned hydraulic tunnel inverted arch work trolley, a rear foot assembly is provided on both sides of the rear end of the main beam, and each rear foot assembly includes two outriggers, an outrigger cylinder and a roller; the two outriggers and the outrigger cylinder are fixed At the rear end of the main beam; the outrigger oil cylinder is located between the two outriggers, and the lower end of the outrigger oil cylinder is connected with the roller through a shoulder pole.

In the above-mentioned hydraulic tunnel inversion trolley, the upper end of the template is equipped with a waterstop clamping piece, the waterstop clamping piece includes a clamping body and a clamp head, and the clamp head is hinged on the clamping body.

The inverted arch construction method utilizing hydraulic tunnel inverted arch operation trolley comprises the following steps:

1) Excavate the foundation pit at the place where the inverted arch is to be installed, and the virtual slag, sundries, accumulated water, etc. in the foundation pit must be cleaned; then install the inverted arch steel frame in the foundation pit;

2) Put the hydraulic tunnel invert trolley in place, ensure that the hydraulic tunnel invert trolley is parallel to the centerline of the tunnel foundation pit, start the hydraulic system, retract the outrigger cylinders and adjust the level of the main beam;

3) Operate the hydraulic system to lower the lifting cylinder and adjust the formwork to make the formwork close to the predetermined height, and install the two rows of screw rods at both ends of the formwork;

4) Operate the hydraulic system so that the translation cylinder moves to adjust the template to the elevation of the inverted arch. After the operation is completed, tighten the two rows of screw rods at both ends of the template and the row of screw rods in the middle of the installation template;

5) Release all the oil cylinders, and then fill the gap between the lining position tunnel and the formwork with concrete, and complete the pouring at one time;

6) Remove the screw rod of the hydraulic tunnel inverted arch operation trolley, operate the hydraulic system, make the lifting cylinder move, lift the formwork, and demould;

7) Operate the hydraulic system to extend the outrigger cylinder, prop up the outriggers of the rear foot assembly, lift the front end of the hydraulic tunnel inversion trolley, and move it to the next construction position.

The beneficial effects of the present invention are: the template of the present invention is connected with the main beam through the lifting cylinder, the structure is simple, the "floating" of the template can be realized, and the positioning is fast; after the construction of the inverted arch is completed, the lifting cylinder can be retracted and taken off formwork, it is no longer necessary to carry out the next construction operation for the overall formwork disassembly and assembly operation, which reduces the labor intensity of workers, and separates the construction of the second lining or side wall connected with the inverted arch, ensuring that the second lining, side wall The connection between the wall and the bottom plate of the inverted arch is smooth and will not be misplaced, which improves the quality of the construction of the inverted arch; in addition, the formwork is put away to carry out the construction of the second lining or the side wall, even if the construction operation of the inverted arch and the second lining or the side wall It is carried out separately without affecting the speed of the entire tunnel construction, which improves the progress of the inverted arch construction.

Description of drawings

Fig. 1 is a front view of the present invention.

Fig. 2 is a left side view of the present invention.

Fig. 3 is a structural diagram of the demoulding state of the present invention.

Detailed ways

The present invention will be further described below in conjunction with the accompanying drawings.

As shown in Figures 1 and 2, the present invention includes a main beam 1, a plurality of templates 2 and three rows of screw mandrels 3, and each template 2 includes a first template 21 and a second template 22, and the first template 21 and the second template The formwork 22 is hinged, and a plurality of formworks 2 are hingedly connected as a whole; the main beam 1 includes a crossbeam 12 and a vertical support 11, and the crossbeam 12 and the vertical support 11 are fixedly connected as one; the main beam The upper end of 1 is provided with two tailstocks 4, and the two ends of each tailstock 3 are respectively hinged with the upper end of a lifting cylinder 41, and the lower end of the lifting cylinder 41 is hinged with the corresponding template 2 respectively. The main beam 1 is also provided with two control frames 13 corresponding to the two tailstocks 4, the control frame 13 is hinged with one end of the translation cylinder 14, and the other end of the translation cylinder 14 is hinged with the lift cylinder 41 at the same end of the two tailstocks 4, The lower ends of the three rows of screw rods 3 are respectively hinged to the two ends and the middle of the template 2, and the upper ends are hinged to the main beam 1.

Both sides of the front end of the main beam 1 are provided with a front foot 5, each front foot 5 includes two legs 61 and two supports 62, the legs 61 are fixed on the front end of the main beam 1, and the supports 52 are sleeved on the legs. The outside of 61, supporting leg 61 and bearing 62 are all provided with pin hole 64, and the spacing between adjacent pin hole 64 is equal, and supporting leg 61 and bearing 62 are connected by pin; The lower end of described bearing 62 is provided with Threaded base 63 is provided.

Both sides of the rear end of the main beam 1 are provided with a rear foot assembly 5, and each rear foot assembly 5 includes two legs 54, a leg oil cylinder 53 and a roller 51; the two legs 54 and the leg oil cylinder 53 are fixed on the main beam The rear end of 1; Outrigger oil cylinder 53 is positioned between two supporting legs 54, and the lower end of outrigger oil cylinder 53 is connected with roller 51 by pole 52.

A through-beam 23 is provided at the joint between the template 2 and the screw rod 3 , and the length of the through-beam 23 is the sum of the lengths of all the templates 2 . The upper end of the template 2 is equipped with a waterstop clamp 24 , the waterstop clamp 24 includes a clamp body 241 and a clamp head 242 , and the clamp head 242 is hinged on the clamp body 241 .

Use the step that the present invention carries out inverted arch construction as follows:

1) Excavate the foundation pit at the place where the inverted arch is to be installed, and the virtual slag, sundries, accumulated water, etc. in the foundation pit must be cleaned; then install the inverted arch steel frame in the foundation pit;

2) Put the hydraulic tunnel invert trolley in place, ensure that the hydraulic tunnel invert trolley is parallel to the center line of the tunnel foundation pit, start the hydraulic system, retract the outrigger cylinder 53 and adjust the level of the main beam 1;

3) Operate the hydraulic system to lower the lifting cylinder 41 and adjust the template 2 so that the template 2 is close to the predetermined height, and install the two rows of screw rods 3 at both ends of the template 2;

4) Operate the hydraulic system so that the translation cylinder 14 moves to adjust the template 2 to reach the elevation of the inverted arch. After the operation is completed, tighten the two rows of screw rods 3 at both ends of the template 2 and the row of screw rods 3 in the middle of the installation template 2;

5) Depressurize all oil cylinders, and then fill the gap between the lining position tunnel and the formwork with concrete;

6) Remove the screw rod 3 of the hydraulic tunnel inversion trolley, operate the hydraulic system, make the lifting cylinder 41 move, lift the formwork 2, and demould;

7) Operate the hydraulic system to extend the outrigger cylinder 53, prop up the outrigger 54 of the rear foot assembly, lift the front end of the hydraulic tunnel inversion trolley, and move it to the next construction position.

Claims (6)

1. A hydraulic tunnel inverted arch operation trolley is characterized in that: it comprises a main girder, a plurality of templates and at least three rows of screw mandrels, each of the templates includes a first template and a second template, and the first template and the second template The formwork is hinged, and multiple formworks are hinged to form a whole; the main beam includes a crossbeam and a vertical support, and the crossbeam and the vertical support are fixedly connected as a whole; the upper end of the main beam is provided with two tails The two ends of each tailstock are respectively hinged with one end of a lift cylinder, and the other ends of the two lift cylinders are respectively hinged with the corresponding formwork. The main beam is also provided with two control frames corresponding to the two tailstocks. The frame is hinged to one end of the translation cylinder, and the other end of the translation cylinder is hinged to the lifting cylinder at the same end of the two tailstocks. The lower ends of the three rows of screw rods are respectively hinged to the two ends and the middle of the template, and the upper ends are hinged to the main beam. 2. The hydraulic tunnel inverted arch operation trolley according to claim 1, characterized in that: a through-beam is provided at the hinge joint between the formwork and the screw rod, and the length of the through-beam is the sum of the lengths of all formworks. 3. The hydraulic tunnel inverted arch operation trolley according to claim 1, characterized in that: both sides of the front end of the main beam are provided with a front foot, each front foot includes a leg and a support, and the leg is fixed on the main beam. At the front end of the beam, the support is set on the outside of the support leg, and pin holes are provided on the support leg and the support, and are connected by pins; the lower end of the support is provided with a threaded base. 4. The hydraulic tunnel inverted arch operation trolley according to claim 1, wherein a rear foot assembly is provided on both sides of the rear end of the main beam, and each rear foot assembly includes two outriggers, an outrigger cylinder and a roller The two outriggers and the outrigger oil cylinder are fixedly mounted on the rear end of the main beam; the outrigger oil cylinder is located between the two outriggers, and the lower end of the outrigger oil cylinder is connected with the roller through a shoulder pole. 5. The hydraulic tunnel inverted arch operation trolley according to claim 1, characterized in that: the upper end of the formwork is equipped with a waterproof cloth clamp, and the waterproof cloth clamp includes a clamp body and a clamp head, and the clamp head is hinged on the holder. 6. A tunnel inverted arch construction method, comprising the steps of: 1) Excavate the foundation pit at the position where the inverted arch is to be installed, and the virtual slag, sundries and accumulated water in the foundation pit must be cleaned; then install the inverted arch steel frame in the foundation pit; 2) Put the hydraulic tunnel invert trolley in place, ensure that the hydraulic tunnel invert trolley is parallel to the centerline of the tunnel foundation pit, start the hydraulic system, retract the outrigger cylinders and adjust the level of the main beam; 3) Operate the hydraulic system to lower the lifting cylinder and adjust the formwork to make the formwork close to the predetermined height, and install the two rows of screw rods at both ends of the formwork; 4) Operate the hydraulic system so that the translation cylinder moves to adjust the template to the elevation of the inverted arch. After the operation is completed, tighten the two rows of screw rods at both ends of the template and the row of screw rods in the middle of the installation template; 5) Release all the oil cylinders, and then fill the gap between the lining position tunnel and the formwork with concrete, and complete the pouring at one time; 6) Remove the screw rod of the hydraulic tunnel inverted arch operation trolley, operate the hydraulic system, make the lifting cylinder move, lift the formwork, and demould; 7) Operate the hydraulic system to extend the outrigger cylinder, prop up the outriggers of the rear foot assembly, lift the front end of the hydraulic tunnel inversion trolley, and move it to the next construction position.