CN115652995A - An overall construction method for a vehicle maintenance base project - Google Patents

Abstract

The invention discloses an overall construction method for a vehicle maintenance base project, which comprises the steps of: carrying out the pile foundation construction of the vehicle base; dividing the front and back of the pile foundation into three pouring sections for pouring; After pouring belt, the three pouring sections after pouring construction form the first, second and third construction running water sections in sequence; the ground mud and poor quality soil are cleaned and leveled as a whole; in the first and third running water sections Carry out excavation and construction of caps and rafts; carry out group backfilling in the first and third running water sections, backfill to the elevation of the caps, and compact them in layers; it can improve the turnover efficiency of materials and facilitate material transportation.

Description

An overall construction method for a vehicle maintenance base project

technical field

The invention relates to the technical field of building construction, in particular to an overall construction method of a vehicle maintenance base project.

Background technique

In recent years, with the development of the city, the construction of underground space projects has developed rapidly, and there are more and more subways. Each subway line includes a vehicle maintenance base. The biggest feature of the vehicle maintenance base project is the large single area with a length of more than 400m. With a width of 200m or more, if the construction organization method of housing construction is adopted, there will be problems such as the materials cannot be transported to the working face due to the large total area, and the concrete pump truck cannot be pumped to the working face due to the distance limitation. At present, it is mainly used to transfer materials through multi-tower cranes with full-covered tower cranes, and it is solved by pouring concrete with ground pump pipelines and opening holes in section steel. However, this method brings great difficulties to the overall construction organization, affects the construction speed, and increases the input cost of manpower and machinery. .

Contents of the invention

The purpose of the present invention is to provide an overall construction method of a vehicle maintenance base project, which can improve material turnover efficiency and facilitate material transportation.

According to the overall construction method of a vehicle maintenance base project provided by the present invention, it comprises steps:

Carry out the pile foundation construction of the vehicle base;

The pile foundation is divided into three pouring sections before and after pouring, and a post-casting belt is set between two adjacent pouring sections at the same time. The three pouring sections after pouring construction form the first, second and third construction sections in sequence The running water section used;

Overall cleaning and leveling of ground mud and poor quality soil;

Excavate caps and rafts in the first and third water sections and construct caps and rafts;

Carry out group material backfilling in the first and third running water sections, backfill to the level of the cap top, and compact in layers;

Set up a wall column operation frame on the platform surface in the first and third running water sections;

Carry out the construction of the first wall column in the first and third running water sections, and simultaneously carry out the excavation and construction of the inner cap and raft in the second running water section;

In the first and third flow sections, continue to erect the column wall operation frame, carry out the second section wall column construction, and at the same time carry out the column wall operation frame erection, wall column construction and group material backfill in the second flow section;

The roof construction is carried out in the first and third flow sections, and the second column wall operation frame erection and wall column construction are carried out in the second flow section;

Complete the erection of the remaining column wall operation frame in the second flow section;

Carry out segmental roof pouring operations in the second flow section;

Check whether the strength of the floor slab meets the requirements. After meeting the requirements, remove the wall column operation frame. After the removal is completed, excavate the CFG piles and carry out pile cap and mattress construction;

Carry out maintenance pit construction and subsequent backfilling operations.

During the concrete pouring process of the pile foundation, due to design requirements or construction needs to be poured in sections, a post-pouring belt is reserved between the concrete poured first and later, and six construction flow sections are evenly divided into six construction flow sections in the pile foundation, which are carried out sequentially. Sectional construction can greatly improve the overall construction efficiency.

Further, a temporary road for material transportation is constructed and set up in the second running water section.

Temporary channels are reserved for other flow sections to carry out material transportation during construction, which can improve the efficiency of material transportation and increase the speed of overall construction.

Further, the backfilling of the group materials is backfilling with soil with a fine-grained soil content greater than 30%.

The soil with a fine-grained soil content greater than 30% is ordinary soil, which is rich in sources and easy to obtain, which can greatly reduce construction costs.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings that need to be used in the description of the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present invention. For those skilled in the art, other drawings can also be obtained based on these drawings without creative effort.

Fig. 1 is the structure plan view that the present invention is divided into three pouring sections before and after in the pile foundation and pours;

Fig. 2 is the structural plan view of the present invention after the excavation of caps and rafts in the first and third running water sections and construction of caps and rafts;

Fig. 3 is a plan view of the structure of the present invention after backfilling the first and third running water sections, backfilling to the elevation of the cap top, and compacting in layers;

Fig. 4 is the structural plan view of the present invention after carrying out the construction of the first wall column in the first and third flow sections, and simultaneously carrying out the excavation and construction of the cap platform and the raft in the second flow section;

Fig. 5 is the structure plan view of the present invention after carrying out the construction of the second section of wall columns in the first and third flow sections, and at the same time erecting the column wall operation frame, construction of the wall columns and backfilling of the group materials in the second flow section;

Fig. 6 is the structure plan view of the present invention after the roof construction is carried out in the first and third flow sections, and the second section column wall operation frame is erected and the wall column construction is carried out in the second flow section;

Fig. 7 is a structural plan view of the present invention after erecting the remaining column wall operating frame in the second flow section.

In the figure, 1-the first flow section; 2-the second flow section; 3-the third flow section; 4-cap; 5-raft; 6-column wall operation frame.

Detailed ways

The specific embodiments of the present invention will be further described below in conjunction with the accompanying drawings. It should be noted here that the descriptions of these embodiments are used to help understand the present invention, but are not intended to limit the present invention. In addition, the technical features involved in the various embodiments of the present invention described below may be combined with each other as long as they do not constitute a conflict with each other.

Referring to Fig. 1, a kind of overall construction method of vehicle overhaul base project of the present invention is shown, comprises steps:

Carry out the pile foundation construction of the vehicle base;

The pile foundation is divided into three pouring sections before and after pouring, and a post-casting belt is set between two adjacent pouring sections at the same time. The three pouring sections after pouring construction form the first, second and third construction sections in sequence The running water section used;

Overall cleaning and leveling of ground mud and poor quality soil;

Excavate caps and rafts in the first and third water sections and construct caps and rafts;

Carry out group material backfilling in the first and third running water sections, backfill to the level of the cap top, and compact in layers;

Set up a wall column operation frame on the platform surface in the first and third running water sections;

Carry out the construction of the first wall column in the first and third running water sections, and simultaneously carry out the excavation and construction of the inner cap and raft in the second running water section;

In the first and third flow sections, continue to erect the column wall operation frame, carry out the second section wall column construction, and at the same time carry out the column wall operation frame erection, wall column construction and group material backfill in the second flow section;

The roof construction is carried out in the first and third flow sections, and the second column wall operation frame erection and wall column construction are carried out in the second flow section;

Complete the erection of the remaining column wall operation frame in the second flow section;

Carry out segmental roof pouring operations in the second flow section;

Check whether the strength of the floor slab meets the requirements. After meeting the requirements, remove the wall column operation frame. After the removal is completed, excavate the CFG piles and carry out pile cap and mattress construction;

Carry out maintenance pit construction and subsequent backfilling operations.

During the pile foundation concrete pouring process, due to the design requirements or construction needs to be poured in sections, a post-casting zone is reserved between each pouring section, and the front and back are divided into the first, second, and third flow sections in turn, and the three flow sections Sectional construction can greatly improve the overall construction efficiency. In this embodiment, the total pouring length is 240 meters, and the pouring design length of each section is 40 meters. The construction of the pouring section and the last three sections is exactly the same, so the whole can be divided into two-step construction, and the first three sections and the last three sections can be constructed successively according to the above construction method. Therefore, the above construction method is not limited to dividing the three sections of flowing water and Construction is also applicable to any other scene where the above-mentioned segmented construction can be used.

A temporary road for material transportation is set up in the second flow section, and the road in the second flow section is used as a temporary passage, which can be used for material transportation in other flow sections during construction, so as to improve the efficiency of material transportation , improve the overall construction speed, as a preferred embodiment of the present invention, the temporary road adopts 20cm thick gradation, that is, a 20cm thick gradation crushed stone cushion.

The backfilling of the group materials uses soil with a fine-grained soil content greater than 30% for backfilling. The fine-grained soil content is greater than 30%, that is, ordinary soil, which has abundant sources and is easy to obtain, which can greatly reduce construction costs.

In the description of the present invention, it should be noted that unless otherwise specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection. Connected, or integrally connected; it can be directly connected, or indirectly connected through an intermediary, and it can be the internal communication of two elements. Those of ordinary skill in the art can understand the specific meanings of the above terms in the present invention in specific situations.

In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "vertical", "inner", "outer" etc. is based on the orientation or position shown in the drawings The relationship is only for the convenience of describing the present invention and simplifying the description, but does not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation of the present invention.

The terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of indicated technical features. Thus, a feature defined as "first" and "second" may explicitly or implicitly include one or more of these features.

The embodiments of the present invention have been described in detail above with reference to the accompanying drawings, but the present invention is not limited to the described embodiments. For those skilled in the art, without departing from the principle and spirit of the present invention, various changes, modifications, substitutions and modifications to these embodiments still fall within the protection scope of the present invention.

Claims (3)

1. A vehicle overhaul base engineering general construction method, is characterized in that, comprises steps: Carry out the pile foundation construction of the vehicle base; The pile foundation is divided into three pouring sections before and after pouring, and a post-casting belt is set between two adjacent pouring sections at the same time. The three pouring sections after pouring construction form the first, second and third construction sections in sequence The running water section used; Overall cleaning and leveling of ground mud and poor quality soil; Excavate caps and rafts in the first and third water sections and construct caps and rafts; Carry out group material backfilling in the first and third running water sections, backfill to the level of the cap top, and compact in layers; Set up a wall column operation frame on the platform surface in the first and third running water sections; Carry out the construction of the first wall column in the first and third running water sections, and simultaneously carry out the excavation and construction of the inner cap and raft in the second running water section; In the first and third flow sections, continue to erect the column wall operation frame, carry out the second section wall column construction, and at the same time carry out the column wall operation frame erection, wall column construction and group material backfill in the second flow section; The roof construction is carried out in the first and third flow sections, and the second column wall operation frame erection and wall column construction are carried out in the second flow section; Complete the erection of the remaining column wall operation frame in the second flow section; Carry out segmental roof pouring operations in the second flow section; Check whether the strength of the floor slab meets the requirements. After meeting the requirements, remove the wall column operation frame. After the removal is completed, excavate the CFG piles and carry out pile cap and mattress construction; Carry out maintenance pit construction and subsequent backfilling operations. 2. The overall construction method of the vehicle maintenance base project according to claim 1, characterized in that a temporary road for material transportation is set up in the second flow section. 3. The overall construction method of the vehicle maintenance base project according to claim 1, characterized in that, the backfilling of the set of materials is carried out with soil with a fine-grained soil content greater than 30%.

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