CN211598682U

CN211598682U - PBA subway station pilot tunnel inner roof longitudinal beam pouring device

Info

Publication number: CN211598682U
Application number: CN201922211433.2U
Authority: CN
Inventors: 周建军; 周国民; 杜宪武; 杨玉平; 李小雷; 曹元义; 王杰; 王志军; 卢占双; 王晶
Original assignee: China Railway Beijing Engineering Group Co Ltd; Tianjin Engineering Co Ltd of China Railway Beijing Engineering Group Co Ltd
Current assignee: China Railway Beijing Engineering Group Co Ltd; Tianjin Engineering Co Ltd of China Railway Beijing Engineering Group Co Ltd
Priority date: 2019-12-11
Filing date: 2019-12-11
Publication date: 2020-09-29
Anticipated expiration: 2029-12-11

Abstract

The utility model discloses a device is pour to top longeron in PBA subway station pilot tunnel, bottom sprag device's lower extreme butt is provided with plugging device in the bottom of pilot tunnel, the bottom sprag device upper end, be provided with in the plugging device with the parallel chamber that holds of pilot tunnel extending direction, hold the intracavity and be provided with steel reinforcement cage, be fixed with pipe and downcomer in the steel reinforcement cage, go up the pipe and be located the downcomer directly over, the length of downcomer is greater than the length of pipe. Aim at solves among the prior art problem that constructor can't pour the roof longeron in the finite space of pilot tunnel. The technical effects achieved are as follows: by adopting a long and short pipe pouring method, the problem that the top longitudinal beam concrete is poured smoothly on the premise of not enlarging the excavation area of the pilot tunnel is solved; the problem that constructors cannot enter the inner opposite-top longitudinal beam to operate in the limited space of the pilot tunnel is solved; the device has simple material manufacturing, and is convenient for material selection on a construction site; the construction period is shortened, and the construction cost is saved; the pouring effect of the poured top longitudinal beam is good.

Description

PBA subway station pilot tunnel inner roof longitudinal beam pouring device

Technical Field

The embodiment of the utility model provides a device technical field is pour to top longeron, concretely relates to device is pour to top longeron in PBA subway station pilot tunnel.

Background

In recent years, the phenomenon of ground traffic jam in many domestic cities is increasingly severe, and subway construction can relieve the phenomenon of ground traffic jam; the method is characterized in that the surface deformation caused in the foundation pit construction process of a station is strictly controlled when a subway station is built on a busy urban street, and the safety of an adjacent existing structure is seriously threatened when the surface deformation is too large; the PBA construction method is used as one of shallow-buried underground excavation methods, deformation disturbance of peripheral strata is small when the PBA construction method is used for constructing a subway station, and the PBA construction method is widely used particularly in soft soil areas; the PBA construction method is also called a hole column method, and a structural stress system of the PBA construction method mainly comprises piles, beams and arches; in the top longitudinal beam construction process, after top longitudinal beam steel bar binding and template installation are finished, constructors cannot enter the pilot tunnel to pour concrete due to the fact that the designed pilot tunnel excavation surface is small; at present, the problem can be solved only by increasing the span of the pilot tunnel in the design process, but according to research, the pilot tunnel excavation directly influences the ground surface settlement and is extremely adverse to the surrounding environment; therefore, the guide tunnel span is increased in the design process, which is not beneficial to the stability of rock and soil mass and the safety of surrounding structures.

SUMMERY OF THE UTILITY MODEL

Therefore, the embodiment of the utility model provides a device is pour to longeron in PBA subway station pilot hole to constructor can't pour the problem of longeron in the finite space of pilot hole among the solution prior art.

In order to achieve the above object, the embodiment of the present invention provides the following technical solutions:

according to the first aspect of the embodiment of the utility model, a PBA subway station pilot tunnel inner top longitudinal beam pouring device comprises a plugging device, a reinforcement cage, an upper conduit, a lower conduit and a bottom supporting device; the lower end of the bottom supporting device is abutted to the bottom of the pilot tunnel, the upper end of the bottom supporting device is provided with a plugging device, a containing cavity parallel to the extending direction of the pilot tunnel is arranged in the plugging device, a reinforcement cage is arranged in the containing cavity, an upper guide pipe and a lower guide pipe are fixed in the reinforcement cage, the upper guide pipe is positioned right above the lower guide pipe, and the length of the lower guide pipe is greater than that of the upper guide pipe.

Furthermore, the upper guide pipe and the lower guide pipe are arranged on the longitudinal symmetrical plane of the accommodating cavity, and the upper guide pipe and the lower guide pipe are parallel to each other.

Further, the length of the downcomer exceeds the length of the upper duct by 3 to 4 meters.

Further, the plugging device comprises a construction joint plugging plate, a side mold supporting arch frame and a bottom plugging plate; the bottom shutoff board sets up in the bottom that holds the chamber, and bottom shutoff board butt is on bottom strutting arrangement, and the both sides wall that the bottom shutoff board is close to the pilot tunnel is provided with the side form respectively and supports the bow member, and the bottom butt that the bow member was supported to the side form is on the bottom shutoff board, and the top bending of side form support bow member upwards is connected with construction joint shutoff board lower extreme, and the top butt of construction joint shutoff board is at the top of pilot tunnel.

Furthermore, the side die supporting arch frame further comprises longitudinal horizontal rods, and a plurality of longitudinal horizontal rods are arranged between the side die supporting arch frame and the inner side wall of the guide hole.

Further, the bottom supporting device comprises a plurality of secondary ridges, a plurality of main ridges, a plurality of transverse horizontal supporting rods and a plurality of vertical supporting rods; the secondary ridges extend along the length direction of the pilot hole, the main ridges are perpendicular to the length direction of the pilot hole, the secondary ridges are arranged on the upper sides of the main ridges, and the secondary ridges and the main ridges are transversely and longitudinally staggered to form a grid shape; the lower end face of the bottom plugging plate is abutted against the secondary ridge, and the lower end of the side mold supporting arch is abutted against the secondary ridge; the upper ends of the vertical support rods are abutted against the main ridge, and the lower ends of the vertical support rods are abutted against the bottom of the pilot tunnel; two ends of the horizontal support rods are respectively and correspondingly abutted against two side walls of the guide hole, and the horizontal support rods are fixedly connected with the vertical support rods.

Furthermore, the bottom support device also comprises a plurality of inclined support rods, and the inclined support rods are obliquely fixed on the horizontal support rods and the vertical support rod connecting bodies.

Furthermore, the bottom support device further comprises a plurality of wood springboards, the bottom of each vertical support rod is provided with the wood springboard, and the bottom of each wood springboard abuts against the bottom of the corresponding guide hole.

Further, still include the steel-pipe column, the bottom shutoff board is run through to the upper end of steel-pipe column, is provided with the lumen in the steel-pipe column, and the lumen communicates with the chamber that holds in the plugging device, and the lower extreme butt of steel-pipe column is on the longeron of end.

Further, still include the delivery pump, the export of delivery pump communicates with upper pipe and downcomer respectively, and the delivery pump is used for pumping self-compaction concrete in upper pipe and the downcomer.

The utility model has the advantages of as follows: the utility model adopts a long and short pipe pouring method, which can smoothly pour the top longitudinal beam concrete on the premise of not enlarging the excavation area of the pilot tunnel; the problem that constructors cannot enter the inner opposite-top longitudinal beam to operate in the limited space of the pilot tunnel is solved; the device has simple material manufacturing, convenient material selection on site in construction and convenient operation; the construction period is shortened, and the construction cost is saved; adopt the device to pour the roof longeron and pour respond well, all reached the concrete placement requirement.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below. It should be apparent that the drawings in the following description are merely exemplary, and that other embodiments can be derived from the drawings provided by those of ordinary skill in the art without inventive effort.

The structure, ratio, size and the like shown in the present specification are only used for matching with the content disclosed in the specification, so as to be known and read by people familiar with the technology, and are not used for limiting the limit conditions which can be implemented by the present invention, so that the present invention has no technical essential significance, and any structure modification, ratio relationship change or size adjustment should still fall within the scope which can be covered by the technical content disclosed by the present invention without affecting the efficacy and the achievable purpose of the present invention.

Fig. 1 is a cross-sectional view of a PBA subway station tunnel inner roof girder casting device provided by some embodiments of the present invention.

Fig. 2 is a sectional view of a reinforcement cage of a PBA subway station tunnel inner roof girder pouring device provided by some embodiments of the present invention.

Fig. 3 is a sectional view of the PBA subway station pilot tunnel inner roof girder pouring device provided with a steel pipe column according to some embodiments of the present invention.

In the figure: 1. the steel reinforcement cage, 2, upper guide pipe, 3, lower guide pipe, 4, pilot hole, 5, construction joint plugging plate, 6, side form support arch center, 7, bottom plugging plate, 8, longitudinal horizontal rod, 9, secondary ridge, 10, main ridge, 11, transverse horizontal support rod, 12, vertical support rod, 13, inclined support rod, 14, wood springboard, 15 and steel pipe column.

Detailed Description

The present invention is described in terms of specific embodiments, and other advantages and benefits of the present invention will become apparent to those skilled in the art from the following disclosure. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Example 1

As shown in fig. 1 to fig. 3, the device for pouring the longitudinal beam at the top of the PBA subway station pilot tunnel in the embodiment includes a plugging device, a reinforcement cage 1, an upper conduit 2, a lower conduit 3 and a bottom support device; bottom sprag device's lower extreme butt is in the bottom of pilot hole 4, the bottom sprag device upper end is provided with plugging device, be provided with in the plugging device with the parallel chamber that holds of 4 extending direction in pilot hole, it is provided with steel reinforcement cage 1 to hold the intracavity, be fixed with upper catheter 2 and downcomer 3 in the steel reinforcement cage 1, upper catheter 2 is located downcomer 3 directly over, the length of downcomer 3 is greater than upper catheter 2's length, plugging device in this embodiment refers to the cover to establish and establishes the baffle structure of placing the concrete seepage in the 1 outside of steel reinforcement cage, steel reinforcement cage 1 forms for the reinforcing bar is worked out, upper catheter 2 and downcomer 3 are the steel pipe, bottom sprag device is the support system of roof longeron.

The construction method of the embodiment comprises the following steps:

1. after the top longitudinal beam support system serving as the bottom support device and the template are erected, binding top longitudinal beam steel bars to form a steel bar cage 1;

2. after the top longitudinal beam steel bars are bound, inserting an upper guide pipe 2 and a lower guide pipe 3 into a top longitudinal beam steel bar cage 1;

3. the length of the upper guide pipe 2 is 8m, the length of the lower guide pipe 3 is 12m, the diameter of the upper guide pipe 3 and the diameter of the lower guide pipe 3 are 300mm, the distance between the upper guide pipe 2 and the top of the top longitudinal beam is 25mm, the distance between the lower guide pipe 3 and the upper guide pipe is 225mm, the upper guide pipe 2 and the lower guide pipe 3 are arranged along the longitudinal symmetrical surface of the beam, and the upper guide pipe 2 and the lower guide pipe 3 are arranged in;

4. and (3) pumping concrete into the upper guide pipe 2 and the lower guide pipe 3, and pouring the top longitudinal beam, wherein the concrete is self-compacting concrete.

The self-compacting concrete adopted in the embodiment is also called vibration-free concrete, and is concrete which is prepared by means of a high-efficiency water reducing agent, a fluidizing agent, a plasticizer and powder particles such as fly ash and slag, has high fluidity, strong separation resistance and good gap passing force and filling property, and can be used for closely filling all corners in a template without vibration only under the action of the self weight of the concrete even under the condition of dense reinforcement, so that uniform and compact high-performance concrete is formed.

The technical effect that this embodiment reaches does: in the embodiment, the long and short pipe pouring method is adopted, so that the problem that top longitudinal beam concrete is poured smoothly on the premise that the excavation area of the pilot tunnel 4 is not enlarged can be solved; the problem that constructors cannot enter the inner opposite-top longitudinal beam to operate in the limited space of the pilot tunnel 4 is solved; the device has simple material manufacturing, convenient material selection on site in construction and convenient operation; the construction period is shortened, and the construction cost is saved; adopt the device to pour the roof longeron and pour respond well, all reached the concrete placement requirement.

Example 2

As shown in fig. 1 to 3, the device for casting a longitudinal beam at the inner top of a PBA subway station guide tunnel in this embodiment includes all the technical features of embodiment 1, in addition to that, the upper conduit 2 and the lower conduit 3 are both disposed on the longitudinal symmetrical plane of the accommodating cavity of the plugging device, the upper conduit 2 and the lower conduit 3 are parallel to each other, for example, the length of the lower conduit 3 exceeds the length of the upper conduit 2 by 3 to 4 meters, and in addition, the length difference between the lower conduit 3 and the upper conduit 2 can be any value.

The beneficial effects in this embodiment are: the interval irrigation is realized by setting the length of the lower guide pipe 3 to be larger than that of the upper guide pipe 2, the longer lower guide pipe 3 irrigates the top longitudinal beam at the front end, and the shorter upper guide pipe 2 irrigates the top longitudinal beam at the rear end; through all setting up upper pipe 2 and downcomer 3 on plugging device's the vertical plane of symmetry that holds the chamber, improved the homogeneity of pouring the concrete, improved and pour the effect.

Example 3

As shown in fig. 1 to fig. 3, the device for pouring the longitudinal beam at the top of the inside of the PBA subway station pilot tunnel in the present embodiment includes all the technical features of embodiment 2, and in addition, the plugging device includes a construction joint plugging plate 5, a side mold supporting arch 6 and a bottom plugging plate 7; the side-form supporting arch centering 6 comprises a bent plate with radian and a bent plate fixing frame, the radian center of the bent plate is positioned at one side close to the inner side wall of the pilot tunnel 4, the construction joint plugging plate 5 is used for plugging by adopting a bamboo plywood at the position of a construction joint, the bottom plugging plate 7 is arranged at the bottom of the accommodating cavity, the bottom plugging plate 7 is abutted on a bottom supporting device, two side walls of the bottom plugging plate 7 close to the pilot tunnel 4 are respectively provided with a side-form supporting arch centering 6, the bottom of the side-form supporting arch centering 6 is abutted on the bottom plugging plate 7, the top end of the side-form supporting arch centering 6 is bent upwards and connected with the lower end of the side-form plugging plate 5, and the top end of the construction joint plugging plate 5 is abutted on the top of the pilot tunnel 4; the side mold supporting arch frame is characterized by further comprising longitudinal horizontal rods 8, and a plurality of longitudinal horizontal rods 8 are arranged between the side mold supporting arch frame 6 and the inner side wall of the guide hole 4; the bottom supporting device comprises a plurality of secondary ridges 9, a plurality of main ridges 10, a plurality of transverse horizontal supporting rods 11 and a plurality of vertical supporting rods 12; the secondary ridges 9 extend along the length direction of the pilot hole 4, the main ridges 10 are perpendicular to the length direction of the pilot hole 4, the secondary ridges 9 are arranged on the upper sides of the main ridges 10, and the secondary ridges 9 and the main ridges 10 are staggered transversely and longitudinally to form a grid shape; the lower end surface of the bottom plugging plate 7 is abutted against the secondary ridge 9, and the lower end of the side mold supporting arch frame 6 is abutted against the secondary ridge 9; the upper ends of the vertical support rods 12 are abutted against the main edge 10, and the lower ends of the vertical support rods 12 are abutted against the bottom of the guide hole 4; two ends of the horizontal support rods 11 are correspondingly abutted against two side walls of the guide hole 4 respectively, and the horizontal support rods 11 are fixedly connected with the vertical support rods 12; the bottom support device also comprises a plurality of inclined support rods 13, and the inclined support rods 13 are obliquely fixed on the connecting bodies of the transverse horizontal support rods 11 and the vertical support rods 12; the bottom supporting device further comprises a plurality of wood springboards 14, the bottom of each vertical supporting rod 12 is provided with the wood springboard 14, and the bottom of the wood springboard 14 abuts against the bottom of the pilot hole 4.

The beneficial effects in this embodiment are: the support of the two side surfaces of the top longitudinal beam is realized by arranging the side mold support arch 6; the longitudinal horizontal rods 8 are arranged, so that the side mold supporting arch 6 is fixed, and the position deviation of the side mold supporting arch 6 caused by concrete pouring is avoided; the woven grid structure of the main ridges 10 and the secondary ridges 9 plays a good supporting role on the top plugging device, and has a strong supporting and fixing effect; by arranging the transverse horizontal support rod 11, the vertical support rod 12 and the inclined support rod 13, a good support effect on a combination of the main edge 10 and the secondary edge 9 is achieved, and a large support force is provided; by arranging the wood springboard 14, the pressure of the vertical supporting rod 12 to the ground is reduced, and the stability of the whole bottom supporting device is enhanced.

Example 4

As shown in fig. 1 to 3, the PBA subway station pilot tunnel inner top longitudinal beam casting device in the present embodiment includes all the technical features of embodiment 3, in addition, includes a steel pipe column 15, the upper end of the steel pipe column 15 penetrates through the bottom plugging plate 7, a pipe cavity is arranged in the steel pipe column 15, the pipe cavity is communicated with a containing cavity in the plugging device, the lower end of the steel pipe column 15 abuts against the bottom longitudinal beam, and a plurality of steel pipe columns 15 are arranged between the top longitudinal beam and the bottom longitudinal beam at intervals; still include the delivery pump, the export of delivery pump communicates with upper conduit 2 and downcomer 3 respectively, and the delivery pump is used for pumping self-compaction concrete in upper conduit 2 and the downcomer 3.

The beneficial effects in this embodiment are: through setting up steel-pipe column 15, realized the supporting role between end longeron and the top longeron, through setting up the delivery pump, realized the automation of pump sending self-compaction concrete in upper conduit 2 and the downcomer 3, reduced human labor.

Although the invention has been described in detail with respect to the general description and the specific embodiments, it will be apparent to those skilled in the art that modifications and improvements can be made based on the invention. Therefore, such modifications and improvements are intended to be within the scope of the invention as claimed.

In the present specification, the terms "upper", "lower", "left", "right", "middle", and the like are used for the sake of clarity only, and are not intended to limit the scope of the present invention, and changes or adjustments of the relative relationship thereof are also considered to be the scope of the present invention without substantial changes in the technical content.

Claims

1. A PBA subway station pilot tunnel inner top longitudinal beam pouring device is characterized by comprising a plugging device, a reinforcement cage (1), an upper guide pipe (2), a lower guide pipe (3) and a bottom supporting device; the lower end of the bottom supporting device is abutted to the bottom of the pilot tunnel (4), the upper end of the bottom supporting device is provided with the plugging device, a containing cavity parallel to the extending direction of the pilot tunnel (4) is formed in the plugging device, the containing cavity is provided with the steel reinforcement cage (1), the upper guide pipe (2) and the lower guide pipe (3) are fixed in the steel reinforcement cage (1), the upper guide pipe (2) is located right above the lower guide pipe (3), and the length of the lower guide pipe (3) is greater than that of the upper guide pipe (2).

2. The PBA subway station pilot tunnel inner top longitudinal beam pouring device according to claim 1, characterized in that said upper conduit (2) and said lower conduit (3) are both arranged on the longitudinal symmetry plane of said containing cavity, said upper conduit (2) and said lower conduit (3) being parallel to each other.

3. The PBA subway station guide tunnel inner top longitudinal beam pouring device according to claim 2, characterized in that the length of said lower conduit (3) exceeds the length of said upper conduit (2) by 3 to 4 meters.

4. The PBA subway station pilot tunnel inner top longitudinal beam pouring device according to claim 1, characterized in that the plugging device comprises a construction joint plugging plate (5), a side form supporting arch (6) and a bottom plugging plate (7); bottom closure plate (7) set up hold the bottom in chamber, bottom closure plate (7) butt is in on the bottom sprag device, bottom closure plate (7) are close to the both sides wall of pilot tunnel (4) is provided with respectively side form support bow member (6), the bottom butt that the bow member (6) was supported to the side form is in on bottom closure plate (7), the top bending that the bow member (6) was supported to the side form upwards with construction joint closure plate (5) lower extreme is connected, the top butt of construction joint closure plate (5) is in the top of pilot tunnel (4).

5. The PBA subway station pilot tunnel inner top longitudinal beam pouring device according to claim 4, characterized by further comprising a longitudinal horizontal rod (8), wherein a plurality of longitudinal horizontal rods (8) are arranged between the side form supporting arch (6) and the inner side wall of the pilot tunnel (4).

6. The PBA subway station pilot tunnel inner top longitudinal beam pouring device according to claim 4, characterized in that the bottom support device comprises a plurality of secondary ridges (9), a plurality of main ridges (10), a plurality of horizontal support bars (11) and a plurality of vertical support bars (12); the secondary ridges (9) extend along the length direction of the pilot hole (4), the main ridges (10) are perpendicular to the length direction of the pilot hole (4), the secondary ridges (9) are arranged on the upper sides of the main ridges (10), and the secondary ridges (9) and the main ridges (10) are staggered transversely and longitudinally to form a grid shape; the lower end face of the bottom plugging plate (7) is abutted against the secondary ridge (9), and the lower end of the side mold supporting arch frame (6) is abutted against the secondary ridge (9); the upper ends of the vertical support rods (12) are abutted against the main edge (10), and the lower ends of the vertical support rods (12) are abutted against the bottom of the guide hole (4); two ends of the horizontal support rods (11) are respectively and correspondingly abutted against two side walls of the guide hole (4), and the horizontal support rods (11) are fixedly connected with the vertical support rods (12).

7. The PBA subway station pilot tunnel inner top longitudinal beam pouring device according to claim 6, characterized in that said bottom support device further comprises a plurality of diagonal support rods (13), said diagonal support rods (13) are obliquely fixed on said horizontal support rods (11) and said vertical support rod (12) connecting body.

8. The PBA subway station pilot tunnel inner top longitudinal beam pouring device according to claim 7, characterized in that said bottom support device further comprises a plurality of wooden springboards (14), the bottom of each said vertical support rod (12) is provided with said wooden springboard (14), and the bottom of said wooden springboard (14) abuts against the bottom of said pilot tunnel (4).

9. The PBA subway station pilot tunnel inner top longitudinal beam pouring device according to claim 4, characterized by further comprising a steel pipe column (15), wherein the upper end of the steel pipe column (15) penetrates through the bottom plugging plate (7), a pipe cavity is arranged in the steel pipe column (15), the pipe cavity is communicated with a containing cavity in the plugging device, and the lower end of the steel pipe column (15) is abutted to the bottom longitudinal beam.

10. The PBA subway station pilot tunnel inner top longitudinal beam pouring device according to claim 1, characterized by further comprising a delivery pump, the outlet of the delivery pump is respectively communicated with the upper conduit (2) and the lower conduit (3), and the delivery pump is used for pumping self-compacting concrete into the upper conduit (2) and the lower conduit (3).