Formwork device for fixing ballast bed base through subway shield segment sliding groove

Abstract

The utility model provides a formwork device for fixing a ballast bed base through a subway shield segment sliding groove. The formwork device comprises two formwork sets and a plurality of formwork fixing devices, wherein the two formwork sets and the formwork fixing devices are vertically and symmetrically arranged on the inner wall of the subway shield segment sliding groove in the axial direction of the subway shield segment sliding groove. Each template group comprises a plurality of rectangular template units; each set of formwork fixing device comprises a first bolt used for fixing the lower end face of the formwork unit, a second bolt arranged on the inner wall of the subway shield segment sliding groove and a tightening basket with one end fixedly connected with the second bolt and the other end connected with the upper end face of the formwork unit in a hooked mode. The formwork device is stable in structure, the formwork is prevented from floating upwards in the base pouring process, the accuracy of the elevation of the base is guaranteed, meanwhile, the effective width of the base and the straightness of the side edge of the base are effectively controlled, and more favorable construction conditions are provided for later-period prefabricated track slab ballast bed ditch pouring.

Description

TECHNICAL FIELD

[0001] The utility model relates to prefabricated track slab basement construction technical field, concretely relates to a template device of fixed ballast bed basement by subway shield segment chute. BACKGROUND

[0002] With the rapid development of domestic high-speed railway slab track and the use of advanced measurement control technology, a new thought and mode are provided for the construction and development of subway track engineering. However, subway track is different from high-speed railway, and there are differences in design technical standards, working condition boundary conditions and the like. Whether the technology can be used in subway construction needs to be combined with the characteristics of subway track construction, to overcome the technical bottlenecks such as narrow environment mechanical assembly of track construction on the basis of digesting and absorbing high-speed railway track construction technology, and to form a new subway prefabricated track construction process and matching tooling.

[0003] Due to the characteristics of subway tunnel construction environment, the subway circular tunnel prefabricated track slab ballast bed construction generally needs to install side formwork, and the holes need to be punched and implanted with steel bars at the position of the edge module line connected by the offset points of the basement to fix the formwork without displacement left and right or forward and backward. First, the implantation of the steel bar pile head is required for fixing the formwork, which will cause a large amount of waste of steel bar raw materials; second, some areas have special regulations that punching is prohibited in the tunnel shield wall, which leads to insecure fixing of the formwork; third, punching increases the labor intensity of workers and is time-consuming and laborious, and electric drills and 220-volt voltage are used, and the steel bars and formwork on site are metal conductors, and in addition to the tunnel construction environment, it is humid and the space is narrow, which will bring great hidden dangers to construction safety. UTILITY MODEL CONTENTS

[0004] The utility model aims at providing a template device for fixing ballast bed basement by subway shield segment chute to solve the above-mentioned problems of prior art.

[0005] To achieve the above-mentioned purpose, the utility model adopts the following technical scheme:

[0006] A template device for fixing ballast bed basement by subway shield segment chute, comprising two template groups and a plurality of template fixing devices which are vertically and symmetrically arranged on the inner wall of the subway shield segment chute along the axial direction of the subway shield segment chute; each template group comprises a plurality of rectangular template units; each template fixing device comprises a first bolt for fixing the lower end surface of the template unit, a second bolt arranged on the inner wall of the subway shield segment chute, and a tightening basket having one end fixedly connected with the second bolt and the other end hooked with the upper end surface of the template unit.

[0007] Further, screw holes are formed on the contact surfaces of adjacent template units and are fixedly connected by third bolts.

[0008] Further, the tightening basket is arranged vertically with the template unit.

[0009] Further, the inner side of the template group is provided with a elevation line for pouring base concrete.

[0010] From the above technical solutions, the utility model has the following technical advantages compared with the prior art:

[0011] The utility model cancels the use of 220-volt voltage, not only energy saving and environmental protection saves a large amount of electric power energy, and more effectively improves the safety factor of worker;

[0012] The utility model cancels the punching operation of the original high-strength shield segment, effectively protects the integrity and safety of the shield segment, greatly reduces the construction labor intensity, saves time and effort, and improves the construction efficiency of template installation;

[0013] The utility model does not use reinforcing steel bars as raw materials for template installation and fixation, avoids waste of reinforcing steel bars on site, improves the utilization rate of reinforcing steel bars, promotes energy saving and emission reduction, improves project management level, and realizes the management concept of cost reduction and benefit increase;

[0014] The reliable connection mode of the template group fixed on the shield segment sliding groove and the triangular structure after installation in the preferred embodiment make the template group more structurally stable, avoid the template group from floating up during base pouring, better control the accuracy of base elevation, provide guarantee for the design requirement of the self-compacting layer filling thickness of the prefabricated track plate, the template group does not appear crooked in the line direction, effectively control the effective width of the base and the straightness of the base side, and provide more favorable construction conditions for later base pouring of the prefabricated track plate. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 It is a whole structure schematic view of the utility model;

[0016] Figure 2 It is a side view of the whole structure of the utility model;

[0017] In the drawing: 1, template unit;2, first bolt;3, second bolt;4, tightening basket;5, third bolt. DETAILED DESCRIPTION

[0018] The preferred embodiment of the utility model will be described in detail below with reference to the drawings.

[0019] As Figure 1 And 2The template device for fixing the track bed base of the subway shield segment chute shown comprises two template groups and several template fixing devices which are vertically and symmetrically arranged on the inner wall of the subway shield segment chute along the axial direction of the subway shield segment chute; each template group comprises several rectangular template units 1; each template fixing device comprises a first bolt 2 for fixing the lower end surface of the template unit 1, a second bolt 3 arranged on the inner wall of the subway shield segment chute and a tightening basket 4 having one end fixedly connected with the second bolt 3 and the other end hooked with the upper end surface of the template unit 1, wherein the tightening basket 4 is arranged perpendicularly to the template unit 1.

[0020] The reliable connection mode of the template group fixed in the shield segment chute and the triangular structure presented after installation and fixation of the preferred embodiment make the template group more structurally stable, avoid the template group from floating up during the base pouring process, better control the accuracy of the base elevation, provide guarantee for the self-compacting layer filling thickness of the prefabricated track slab to meet the design requirements, and the template group does not appear crooked in the line direction, which well controls the effective width of the base and the straightness of the side edge of the base, and provides more favorable construction conditions for the track bed pouring of the prefabricated track slab in the later period.

[0021] The contact surface of the adjacent template unit 1 is provided with a threaded hole and is fixedly connected through a third bolt 5; the detachable connection mode makes the template unit 1 more convenient to transport and disassemble, increases the application range and the service life.

[0022] The inner side surface of the template group is provided with an elevation line of the poured base concrete, which is used as a reference for pouring the base concrete; in the specific construction, the following steps are included:

[0023] S1, according to the design to provide elevation and coordinates and provide the base width of the prefabricated slab, calculate the offset distance of the base of the prefabricated slab on both sides by using the design track center line, then use the arbitrary station control network results to freely set the station, and mark the offset distance points on both sides of the base, and collect the tunnel wall base elevation; then calculate the elevation difference by subtracting the base finished surface to the design track elevation from the design track elevation, and then subtract the base elevation from the elevation difference to obtain the base thickness value;

[0024] S2, connect the base offset distance points on both sides into a line as the edge mold line of the template group by using the ink bucket line method, and after the edge mold line is completed, the base reinforcement can be bound according to the design drawing;

[0025] S3, after the base steel bar binding is finished, the formwork unit is fixedly connected with the inner wall of the subway shield segment chute by using the formwork fixing device, and meanwhile, the formwork unit is adjusted to keep a vertical state; the multiple formwork units are connected and reinforced by the formwork fixing device according to a fixed interval along the line direction;

[0026] S4, after the prefabricated track slab base formwork device is assembled and fixed, the base thickness value is calculated by using the offset distance points on both sides of the lofting base, so that the elevation points of the base pouring thickness can be measured by using a right-angle ruler against the formwork, and the elevation points are marked; the elevation points of the thickness are connected into a line by using the ink bucket to draw a line, that is, the elevation line, which is used as a reference when the base concrete is poured.

[0027] The above-described embodiments are merely preferred embodiments of the present application, and are not intended to limit the scope of the present application. Various modifications and improvements to the technical solutions of the present application made by those skilled in the art without departing from the design spirit of the present application shall fall within the protection scope of the present application as defined by the claims.

Claims

1. A formwork device for fixing a ballast bed substrate using a subway shield segment chute, characterized by, Two groups of formworks and several groups of formwork fixing devices are symmetrically arranged along the axial direction of the subway shield segment chute and on the inner wall of the subway shield segment chute; Each group of formworks comprises several rectangular formwork units; Each group of formwork fixing devices comprises a first bolt for fixing the lower end surface of the formwork unit, a second bolt arranged on the inner wall of the subway shield segment chute, and a tightening basket having one end fixedly connected with the second bolt and the other end hooked with the upper end surface of the formwork unit.

2. The formwork device for fixing the ballast bed substrate using the subway shield segment chute according to claim 1, wherein Screw holes are formed on the contact surfaces of adjacent formwork units and are fixedly connected by a third bolt.

3. The formwork device for fixing the ballast bed substrate using the subway shield segment chute according to claim 1, wherein The tightening basket is arranged perpendicularly to the formwork unit.

4. The formwork device for fixing the ballast bed substrate using the subway shield segment chute according to claim 1, wherein An elevation line for pouring base concrete is arranged on the inner side surface of the group of formworks.

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