CN104405417A - Inverted arch construction trolley for self-propelled tunnel - Google Patents

Abstract

A self-propelled tunnel inverted arch construction trolley, comprising an inverted arc formwork of the trolley, the inverted arch formwork of the trolley is connected to a longitudinal main beam through a hydraulic cylinder and several adjustable rods, and one end of the longitudinal main beam Connect the "L"-shaped walking system and the counterweight platform. The walking system and the counterweight platform are equipped with walking wheels at the bottom, and the walking system and the counterweight platform are equipped with walking control devices and counterweights. It solves the problems of slow construction of the tunnel invert, integral one-time formwork, difficult installation of the formwork and easy "running of the formwork" after installation, speeds up the construction progress of the tunnel invert, and effectively controls the step distance between the invert and the red line of the tunnel face. The simultaneous pouring of the inverted arch and the small side wall is realized, which ensures the construction quality of the tunnel inverted arch, and has the characteristics of easy operation and fast construction.

Description

A self-propelled tunnel inverted arch construction trolley

technical field

The invention relates to a self-propelled tunnel inverted arch construction trolley.

Background technique

At present, the construction of tunnel inverts mostly adopts the combination of small templates and manual installation on site, and then pours the concrete for the inverts. The cycle of the inverts is about 4 to 5 days. There are many formworks and supporting rods, and it is difficult to fix the wooden boards. The time is long, the construction efficiency is low, and the quality control effect is poor.

Contents of the invention

The purpose of the present invention is to provide a self-propelled tunnel inverted arch construction trolley, which solves the problems of slow construction of the tunnel inverted arch, integral one-time formwork, difficult installation of the formwork, and easy "running of the formwork" after installation, and speeds up the construction of the tunnel inverted arch. The construction progress of the arch effectively controls the step distance between the inverted arch and the red line of the tunnel face, realizes the simultaneous pouring of the inverted arch and the small side wall, ensures the construction quality of the tunnel inverted arch, and has the characteristics of easy operation and fast construction.

The technical solution adopted to achieve the above purpose includes the trolley inverted arch formwork, the trolley inverted arch formwork is connected to the longitudinal main beam through a hydraulic cylinder and several adjustable rods, and one end of the longitudinal main beam is connected to " L”-shaped walking system and counterweight platform. The bottom of the walking system and counterweight platform is equipped with walking wheels. The walking system and counterweight platform are equipped with walking control devices and counterweights.

Compared with the prior art, the present invention has the following advantages.

1) The designed self-propelled hydraulic inverted arch trolley increases the construction speed of the inverted arch from the original 4 days/cycle (the inverted arch has no reinforcement) to 2.5 days/cycle, which greatly improves the efficiency of the inverted arch construction;

2) The design of the self-propelled hydraulic inverted arch trolley adopts the hydraulic automatic adjustment of the overall formwork, the appearance quality of the concrete has been improved, and the phenomenon of "running mold" of the small side wall has been solved. The speeding up of the inverted arch construction has ensured the overall construction progress of the tunnel, which not only ensures the construction period of the tunnel, but also saves a large cost with a small investment.

Description of drawings

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

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

Fig. 2 is a schematic side view of the structure of the device;

Figure 3 is a schematic diagram of the working cross-section of the device during construction.

Detailed ways

Including trolley inverted arc formwork 5, as shown in Figure 1 and Figure 2, said trolley inverted arch formwork 5 is connected with longitudinal main girder 1 through hydraulic cylinder 3 and several adjustable rods 4, and said longitudinal One end of the main girder 1 is connected to an "L" shaped walking system and a counterweight platform 2, and the bottom of the walking system and the counterweight platform 2 is provided with a walking wheel 9, and the walking system and the counterweight platform 2 are provided with a walking control device and a counterweight.

The longitudinal girder 1 is provided with a front lifting point 13 and a rear lifting point 14, the front lifting point 13 is hinged to the trolley inverted arch formwork 5 through the hydraulic cylinder 3, and the rear lifting point 14 is hinged to the trolley through the adjustable rod 4 Inverted arc formwork 5; both sides of the lower end of the longitudinal main beam 1 are provided with front hanging points 12 and rear hanging points 11, and the front hanging points 12 are hinged to the inverted arch of the trolley through the hydraulic cylinder 3 and the adjustable rod 4 The circular arc formwork 5, the rear hanging point 11 is hinged to the inverted arc formwork 5 of the trolley through the adjustable rod 4.

Example

The device includes a longitudinal main beam 1, and one end of the longitudinal main beam 1 is provided with a walking system and a counterweight platform 2, as shown in Figures 1 and 2, two sets of hydraulic cylinders 3 and several Adjustable rods 4, trolley inverted arch formwork 5 are connected to longitudinal main beam 1 through hydraulic cylinder 3 and several adjustable rods 4, inverted arch lining end formwork 6 is installed in place before the trolley moves forward, after installation After the lower layer of the inverted arch lining end formwork 6 is installed in place, the buried waterstop 7 is installed, and then the upper formwork of the inverted arch lining end formwork 6 is installed. The two-layer formwork is fixed by clamps. After the inverted arch end formwork is installed in place, Push the trolley forward through the walking system and the counterweight platform 2. After moving to the design position, adjust the elevation through the adjustable support system to ensure that the front and rear are at the same elevation, and anchor with anchor rods. The hydraulic cylinder 3 works to adjust the inverted arc formwork 5 in place according to the design requirements and reinforce it with the adjustable rod 4.

The self-propelled hydraulic invert trolley adopts profiled steel on one side to make the longitudinal main girder 1, and the longitudinal main girder 1 adds a surplus length according to the construction length of each plate invert to ensure the installation of the end formwork and the installation of the support system. The oil cylinder positioning slot and the adjustable screw positioning slot are set on the beam 1 to ensure the easy disassembly of the oil cylinder and the adjustable screw; The support system can be directly supported on the initial support after being in place to ensure the stability of the trolley; the other end of the hydraulic cylinder 3 and the adjustable rod 4 is connected to the inverted arc formwork 5, and the hydraulic cylinder 3 and the adjustable rod 4 are connected according to The length of the stroke is designed. There are two sets of hydraulic cylinders 3 at both ends of the unilateral inverted arch trolley. The hydraulic cylinder is mainly used to lift the formwork to ensure the distance between the arc formwork and the backfill top surface of the inverted arch, which is convenient for later construction. The long-distance hydraulic cylinder lifts the template; the walking system walks on the top surface of the poured inverted arch backfill through four steel wheels driven by the motor. Arrive at the design formulation position.

After the trolley moves forward to the design position, the support system of the front section falls, and it is lifted according to the design elevation position, and the elevation position of the trolley is adjusted. The synchronous walking of the inverted arch arc formwork is pushed to the design position, and then the formwork is reinforced through adjustable rods, and the front and rear of the trolley are anchored, and the vertical waterstop on the small side wall is installed to carry out the concrete For pouring, the arc formwork of this tooling is an integral formwork, which is adjusted by the hydraulic system, and there is no need to manually install the loose formwork. From this aspect, it saves personnel and improves construction efficiency. The entire inverted arch construction reduces manual labor. Speed up the construction, but also ensure the overall construction quality.

(1) The self-propelled hydraulic invert trolley is divided into left and right sections, as shown in Figure 3, each independent trolley, the two sides of the invert are constructed simultaneously, and the trolleys move forward to the design position, and then carry out precise positioning. The trolley travels mainly on the rear walking system and counterweight platform (prefabricated concrete blocks are placed on the counterweight platform according to design requirements).

(2) The longitudinal main girder is welded by section steel, the front section is small, and the rear section is large (to reduce the weight of the front end, reduce the counterweight at the back, and facilitate walking), and the rear end is pinned together with the walking system and the counterweight platform , the total length of the longitudinal main girder is 12.5m, the length of the walking system and the counterweight platform is 6m, the longitudinal length of the inverted arch formwork is 11.9m (corresponding to the construction length of the lining trolley), the inverted arch formwork is processed according to the large formwork, each section The length is 2.975m, with a total of 4 sections, which are assembled into a whole on site. The arc length of the inverted arch arc formwork is 1.915m;

(3) After the pin connection between the longitudinal main girder and the walking system and the counterweight platform is completed, the hydraulic system is installed and debugged, and the inverted arch arc formwork is installed, and the construction section is constructed during walking after the assembly and debugging outside the cave;

(4) Before the self-propelled hydraulic inverted arch trolley moves, the position of the center line, the position of the end of the inverted arch and the elevation of the top surface of the small side wall must be determined, so as to facilitate the adjustment of the position during the movement of the trolley; The type waterstop is installed in place before the trolley goes out of shape

(5) After the self-propelled hydraulic inverted arch trolley walks to the design position, conduct a review. After confirming that it is correct, anchor the front and rear of the trolley. parts and longitudinal girders are reinforced.

(6) After the trolley is in place and the reinforcement is completed, install the longitudinal waterstop of the small side wall, and then pour the concrete after checking that it is correct;

(7) After pouring the concrete and waiting for the initial setting, the concrete level is covered with wet geotextiles for maintenance. After the concrete strength reaches 2.5Mpa, remove and lift the inverted arch arc formwork, and then install the inverted arch backfill end formwork for inverted arch backfill construction.

Claims (2)

1. A self-propelled tunnel inverted arch construction trolley, comprising a trolley inverted arch formwork (5), characterized in that the trolley inverted arch formwork (5) passes through a hydraulic cylinder (3) and several movable The adjusting rod (4) is connected to the longitudinal main beam (1), and one end of the longitudinal main beam (1) is connected to the "L" shaped walking system and the counterweight platform (2), and the bottom of the walking system and the counterweight platform (2) is set Walking wheels (9) are arranged, and a walking control device and a counterweight are arranged on the walking system and the counterweight platform (2). 2. A self-propelled tunnel inverted arch construction trolley according to claim 1, characterized in that, the longitudinal main girder (1) is provided with a front lifting point (13) and a rear lifting point (14), and the front The lifting point (13) is hinged to the trolley inverted arch formwork (5) through the hydraulic cylinder (3), and the rear lifting point (14) is hinged to the trolley inverted arch formwork (5) through the adjustable rod (4); There are front hanging points (12) and rear hanging points (11) on both sides of the lower end of the longitudinal main beam (1), and the front hanging points (12) are hinged by hydraulic cylinders (3) and adjustable rods (4) The trolley inverted arc formwork (5), the rear hanging point (11) is hinged to the trolley inverted arch formwork (5) through the adjustable bar (4).