CN216866719U - Unilateral formwork support of shield working well inner wall concrete structure - Google Patents

Abstract

The utility model discloses a single-side formwork of a concrete structure of an inner wall of a shield working well, which relates to the field of construction of underground space structures and comprises a bottom plate, a diaphragm wall and side walls, wherein the bottom plate is arranged at the lower end inside the diaphragm wall, a plurality of enclosing purlins are arranged on the inner side wall of the diaphragm wall in a surrounding mode, the side walls are arranged inside the diaphragm wall, the top ends of the side walls extend to the top ends of the inner side walls of the diaphragm wall, and the inner side walls of the enclosing purlins extend to the inner sides of the side walls. According to the utility model, by adopting the enclosing purlin permanent temporary combined structure, reasonable process alternation is realized, and technical treatment of process connection is made, the waterproof of a high temporary hollow side wall template reinforcing system and an ultra-deep foundation pit structure is strengthened, the leakage risk is reduced, the construction efficiency is improved, the resource and labor input are reduced, a large amount of cost is reduced, related components are pre-embedded, and the construction period is reduced; meanwhile, the mode of reinforcing the template is avoided being optimized, high formwork main bodies are avoided being erected, labor cost, turnover material cost and equipment lease cost are saved, the construction period is shortened, and the construction period cost is reduced.

Description

Unilateral formwork support of shield working well inner wall concrete structure

Technical Field

The utility model relates to the field of construction of underground space structures, in particular to a single-side formwork of a concrete structure of an inner wall of a shield working well.

Background

The urban underground space is an important component of urban space resources, the coordinated development of the ground and the underground is a necessary trend, and particularly for modern cities, the utilization and the development of the underground space are continuously improved. Therefore, the depth and the area of the foundation pit in the underground space are increased, and the space structure is more complicated. The underground engineering construction has the remarkable characteristics that the connection of the process interpenetration, the risk of foundation pit deformation, the safety of high-altitude construction and the prevention and treatment of structural leakage are all difficult problems that each underground engineering needs to be mainly attacked. Particularly, the method is more important for underground engineering with complex underground environment and ultra-normal foundation pit depth, so that the deep research on the construction of the permanent temporary combination of high temporary space (deep foundation pit) and underground space structure is more important.

Although the underground space structure is widely applied, the construction technology level is still insufficient in the construction of the side wall structure of an ultra-deep foundation pit, particularly a high-altitude multi-obstacle area with the depth of more than 30 m. Under the condition of high pressure and rich water, the structure size is increased, and the difficulty of ensuring the entity quality and the impermeability performance is increased sharply by the reinforcement measure during the construction of the side wall structure.

Therefore, the utility model is necessary to solve the problems by the single-side formwork of the shield working well inner wall concrete structure.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a single-side formwork of a shield working well inner wall concrete structure to solve the problems in the background technology.

In order to achieve the purpose, the utility model provides the following technical scheme: the single-side formwork of the shield working well inner wall concrete structure comprises a bottom plate, a ground connecting wall and a side wall, wherein the bottom plate is arranged at the lower end inside the ground connecting wall, a plurality of purlins are arranged around the inner side wall of the underground diaphragm wall, side walls are arranged inside the underground diaphragm wall, the top end of the side wall extends to the top end of the inner side wall of the ground connecting wall, the inner side walls of the plurality of purlins extend to the inner side of the side wall, a supporting mould main body is arranged around the inner side of the side wall, a plurality of groups of oppositely-pulling screw rods distributed in an annular array are fixedly arranged on the supporting mould main body in a penetrating way, each group comprises a plurality of oppositely-pulling screw rods which are distributed at equal intervals, one end of each oppositely-pulling screw rod penetrates through the side wall, and extends to the inside of the ground connecting wall, the inner side of the formwork main body is provided with supporting bases which are in one-to-one correspondence with a plurality of groups of oppositely-pulled screw rods, the other end of the counter-pull screw rod is fixedly provided with an inclined strut, and one end of the inclined strut is fixedly connected with one side of the supporting base.

Preferably, one side of the formwork main body, which is far away from the side wall, is provided with a plurality of square timbers, and the plurality of square timbers are distributed at equal intervals.

Preferably, it is a plurality of the square timber all is the level setting, the setting of keeping away from the side wall of formwork main part is provided with the steel pipe that the multiunit is equidistant distribution, and every group includes the steel pipe that two vertical symmetries set up.

Preferably, the steel pipes are located on one side, away from the formwork main body, of the square timber, the other end of the opposite-pulling screw rod is provided with a bolt, and the square timber and the steel pipes are fixedly connected with the formwork main body through the bolts.

Preferably, the inside lower extreme of ground even wall is provided with the scaffold, and the top of scaffold extends to the top of ground even wall.

The utility model has the technical effects and advantages that:

according to the utility model, by adopting the enclosing purlin permanent temporary combined structure, reasonable process alternation is realized, and technical treatment of process connection is made, the waterproof of a high temporary hollow side wall template reinforcing system and an ultra-deep foundation pit structure is strengthened, the leakage risk is reduced, the construction efficiency is improved, the resource and labor input are reduced, a large amount of cost is reduced, the related components are pre-embedded, and the construction period is reduced by 30%; meanwhile, the mode of reinforcing the template is avoided being optimized, the high formwork main body erection is avoided, labor cost, turnover material cost and equipment renting cost are saved, the construction period is shortened, the construction period cost is reduced, multiple reinforcement, safety and reliability are realized, the soil pressure and water resistance are generally considered for an ultra-deep underground space structure, the thickness is thick, the concrete side pressure is large during pouring, single-side formworks are adopted for the permanently combined underground structure side wall, under the conditions of high altitude and limited operation space, the reinforcing steel bar fixing rail is adopted for reinforcement, the outer steel pipe inclined strut is adopted for reinforcement, the safety is ensured through multiple guarantee, meanwhile, the reinforcement rust prevention measure is considered before construction, the water resistance of a drilling area and the water resistance of a construction joint are considered in construction, the grouting treatment is carried out on a concrete shrinkage part after the wall is poured, and the waterproof quality of a foundation pit is ensured through multiple guarantee.

Drawings

Fig. 1 is a schematic structural view of a connection mode of a purlin and a side wall.

Fig. 2 is a schematic view of a side wall formwork structure of the present invention.

Fig. 3 is a schematic view of the formwork reinforcing structure of the present invention.

In the figure: 1. a base plate; 2. a ground connecting wall; 3. a side wall; 4. a formwork main body; 5. square wood; 6. a steel pipe; 7. a bolt; 8. a support base; 9. bracing; 10. oppositely pulling the screw rod; 11. enclosing purlins; 12. a scaffold.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The utility model provides a single-side formwork of a concrete structure of an inner wall of a shield working well as shown in figures 1-3, which comprises a bottom plate 1, a ground connecting wall 2 and side walls 3, wherein the bottom plate 1 is arranged at the lower end inside the ground connecting wall 2, a plurality of purlins 11 are arranged on the inner side wall of the ground connecting wall 2 in a surrounding manner, the side walls 3 are arranged inside the ground connecting wall 2, the top ends of the side walls 3 extend to the top ends of the inner side walls of the ground connecting wall 2, the inner side walls of the purlins 11 extend to the inner side of the side walls 3, a formwork main body 4 is arranged on the inner side of the side walls 3 in a surrounding manner, a plurality of groups of counter-pulling screws 10 distributed in an annular array are fixedly arranged on the formwork main body 4 in a penetrating manner, each group comprises a plurality of counter-pulling screws 10 distributed at equal intervals, one end of each counter-pulling screw 10 penetrates through the side wall 3 and extends to the inner side of the ground connecting wall 2, supporting bases 8 corresponding to the plurality of counter-pulling screws 10 are arranged on the inner side of the formwork main body 4, the other end of the counter-pull screw rod 10 is fixedly provided with an inclined strut 9, and one end of the inclined strut 9 is fixedly connected with one side of the supporting base 8.

Further, one side of the formwork main body 4, which is far away from the side wall 3, is provided with a plurality of square timbers 5, the square timbers 5 are distributed at equal intervals, the square timbers 5 are horizontally arranged, a plurality of groups of steel pipes 6 distributed at equal intervals are arranged on the side wall 3 of the formwork main body 4, each group comprises two vertically and symmetrically arranged steel pipes 6, the steel pipes 6 are all positioned on one side of the square timbers 5, which is far away from the formwork main body 4, the other end of the counter-pulling screw 10 is provided with a bolt 7, the square timbers 5 and the steel pipes 6 are fixedly connected with the formwork main body 4 through the bolts 7, the lower end inside the diaphragm wall 2 is provided with a construction frame 12, the top end of the construction frame 12 extends to the top end of the diaphragm wall 2, a combination structure is permanently faced by adopting an enclosing purlin, reasonable procedures are alternated, technical treatment of the procedures is well done, a high-faced side wall formwork reinforcement system and an ultra-deep foundation pit waterproof structure are strengthened, the leakage risk is reduced, the construction efficiency is improved, the resource and labor input are reduced, a large amount of cost is reduced, related components are pre-embedded, and the construction period is reduced by 30%; meanwhile, the mode of reinforcing the template is avoided being optimized, the high formwork main body 4 is avoided being erected, labor cost, turnover material cost and equipment renting cost are saved, the construction period is shortened, the construction period cost is reduced, multiple reinforcement, safety and reliability are achieved, soil pressure and water resistance are generally considered for an ultra-deep underground space structure, the thickness is thick, concrete side pressure is large during pouring, single-side formworks are adopted for the side walls of the permanently-adjacent combined underground structure, under the conditions that the height is near empty and the operation space is limited, the reinforcing steel bar is adopted for reinforcing the construction method, the outer steel pipe inclined strut is adopted for reinforcing, safety is ensured through multiple guarantee, meanwhile, reinforcement rust prevention measures are considered before construction, water resistance of a drilling area and water resistance of a construction joint are considered in construction, grouting treatment is carried out on a concrete shrinkage position after wall measurement pouring, and high-quality waterproof foundation pits are ensured through multiple guarantee.

The working principle of the utility model is as follows:

the side walls 3 between the surrounding purlins 11 are constructed in sequence from bottom to top, a single-side formwork supporting mode is adopted for reinforcement, concrete pouring and vibration are completed through pouring holes and vibration holes reserved in the surrounding purlins 11 on the upper layer, pre-buried sleeves are cleaned in advance, and reinforcing is adopted for reinforcing damaged sleeves by planting ribs; vertical steel bars are mechanically connected by long and short wires, welding is adopted when local parts cannot be aligned, the welding length is not less than 10d by single-side welding, a water swelling water stop bar and a grouting hose are longitudinally installed along the side wall 3 in a seam area below the upper-layer purlin 11 above the side wall 3 during the installation period of the steel bars, then the side wall 3 adopts a single-side 18mm thick wood template, a 100 x 100mm wood square column or a 48 x 3.0mm double steel pipe is transversely arranged on a main edge, the interval is 600mm, and the overhanging length is not more than 200 mm; the secondary ridges adopt 100 multiplied by 50mm wood purlin, the spacing between the secondary ridges is 250mm, and the overhanging length of the secondary ridges is less than or equal to 200 mm;

the template reinforcement is installed after drilling according to the embedded steel bar position, and the tie rod in the area is a wall embedded steel bar tie rod; then, calculating encrypted pull rods according to the design of a single-side formwork, welding the part of pull rods with vertical steel bars in a welding mode, and anchoring the vertical steel bars between the upper and lower layers of surrounding purlins 11; the 1/3 and 2/3 positions of the outer sides of the templates are reinforced by inclined struts 9 of steel pipes with the diameter of 48 multiplied by 3.0 mm;

pouring concrete from a pouring hole by using a top pump through a string barrel or a chute, vibrating by using an insert vibrator according to a vibrating hole position, and inserting the concrete into the pouring hole for 30-40 s by fast inserting and slow pulling; arranging a specially-assigned person to knock a mold to check in the lower template area during pouring, opening a small opening above the template to observe the pouring height, and performing supplementary pouring and vibration in time to avoid the occurrence of cavities;

and pouring is controlled by one layer of 30cm, when the last layer below the surrounding purlin 11 is poured, micro-expansion concrete and micro-expansion concrete are adopted, the mixing amount of the expanding agent is controlled to be 7% -9%, a side wall template can be disassembled after 3d of pouring, and the side wall is maintained in a spraying manner.

Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments or portions thereof without departing from the spirit and scope of the utility model.

Claims (5)

1. Shield constructs work well inner wall concrete structure unilateral formwork, its characterized in that: the formwork comprises a bottom plate (1), a ground connecting wall (2) and side walls (3), wherein the bottom plate (1) is arranged at the lower end of the inside of the ground connecting wall (2), a plurality of surrounding purlins (11) are arranged on the inner side wall of the ground connecting wall (2) in a surrounding mode, the side walls (3) are arranged inside the ground connecting wall (2), the top ends of the side walls (3) extend to the top ends of the inner side walls of the ground connecting wall (2), the inner side walls of the surrounding purlins (11) extend to the inner sides of the side walls (3), a formwork main body (4) is arranged on the inner side of each side wall (3) in a surrounding mode, a plurality of groups of oppositely-pulling screw rods (10) distributed in an annular array are fixedly arranged on the formwork main body (4) in a penetrating mode, each group comprises a plurality of oppositely-pulling screw rods (10) distributed at equal intervals, one end of each oppositely-pulling screw rod (10) penetrates through the side wall (3) and extends to the inside of the ground connecting wall (2), supporting bases (8) corresponding to the groups of the oppositely-pulling screw rods (10) one by one another are arranged on the inner side of the formwork main body (4), the other end of the counter-pull screw rod (10) is fixedly provided with an inclined strut (9), and one end of the inclined strut (9) is fixedly connected with one side of the supporting base (8).

2. The single-side formwork of the shield working well inner wall concrete structure according to claim 1, characterized in that: one side of the formwork main body (4) far away from the side wall (3) is provided with a plurality of square timbers (5), and the square timbers (5) are distributed at equal intervals.

3. The single-side formwork of the shield working well inner wall concrete structure according to claim 2, characterized in that: it is a plurality of square timber (5) all are the level setting, the setting of keeping away from side wall (3) of formwork main part (4) is provided with multiunit and is equidistant steel pipe (6) that distribute, and every group includes steel pipe (6) that two vertical symmetries set up.

4. The single-side formwork of the shield working well inner wall concrete structure according to claim 3, characterized in that: a plurality of steel pipe (6) all are located square timber (5) and keep away from one side of formwork main part (4), the other end of split screw (10) is provided with bolt (7), and a plurality of square timber (5) and steel pipe (6) are through a plurality of bolts (7) and formwork main part (4) fixed connection.

5. The single-side formwork of the shield working well inner wall concrete structure according to claim 4, characterized in that: the inside lower extreme of ground even wall (2) is provided with scaffold (12), and the top of scaffold (12) extends to the top of ground even wall (2).

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