Aerial view of the cultural center (weakened in greening, beautiful and occupying less land) 2 engineering methods in this project, the shaft is divided into 6 layers along the height, the bottom layer is the blade foot layer, and the other 5 layers are the standard layer, each layer is divided into 10 pieces, and each inner and outer wall is consolidated with each other through connecting ribs.

and China Railway Science and Technology Construction Co., Ltd.

The single depot covers an underground area of 380m2 and a ground area of 120m2.

Therefore, the research and development purpose of precast caisson type underground mechanical parking garage is to build underground parking garage by using the narrow plots around the old urban community, park green space, business district and other surrounding corners, so as to solve the parking problem in some cities.

5) The prefabrication of warehouse components in the factory can maximally improve the common quality problems such as concrete cracking and leakage, and improve the overall safety grade, fire resistance and durability of the garage.

After the precast blocks are spliced into rings and stacked layers, the “staggered pouring of inner cavity self compacting concrete” is the most core structural waterproof design.

It is the first underground parking garage constructed by precast assembly + open caisson method and rational use of corner green space underground space in Fujian Province.

The caisson type underground mechanical parking garage project around Haicang District administrative center consists of two independent garages, which are respectively built in Haicang District Culture and Art Center and administrative service center of Xiamen city.

During assembly, not only the verticality of the shaft and the stability of the block shall be ensured, but also the vertical joints of adjacent layers shall not be in the same vertical line.

The main construction period is 5 months.

has applied for an invention patent, which can be produced and has strong reproducibility.

In particular, it plays a role in assembly design, matching design of steel structure and equipment structure, material procurement, cost control, review of use function, control of construction period and so on.

In the process, BIM Technology is adopted to timely adjust and correct the problems of component assembly and construction collision of various disciplines, simulate the use process of vehicles of various specifications, and check parking errors.

has been completed, The following describes the project in detail from four aspects: R & D background and overview, engineering methods, BIM Technology Application and innovation advantages.

2) The open caisson sinking method is used to integrate the foundation pit support with the double walls of the external wall of the structure, which belongs to the reverse construction method, reducing the process and saving materials.

Fixing Socket Cross Pin Nail Plate

China Railway Kejian Co., Ltd.

4) The cylinder is divided into double skin cavity structure for prefabrication.

The cross field application of large-diameter open caisson combined with precast assembly is the first successful practical project.

The on-site construction steps are as follows: 1) splice the foot block into a cylindrical foot layer.

The contradiction between supply and demand is more serious.

7) It is conducive to environmental protection, land saving and energy saving..

All inner and outer walls are precast in the factory with high-precision large shaped steel formwork, which has a high degree of standardization and modularization The foot block standard block will be transported to the site for assembly, and reinforced concrete will be poured in the inner cavity between the inner and outer walls to ensure the connectivity and safety of the cast shaft.

Before assembly, first make preparations for setting out and setting up tooling rack to ensure the accuracy of assembly; 2) Pour reinforced concrete into the inner cavity of the blade foot layer at one time, and then excavate the ground around the blade foot layer to make the blade foot layer sink in place; 3) The hoisting standard blocks are spliced with the installed shaft top, and the adjacent standard blocks are spliced in turn to form the upper layer of the shaft.

At present, it has been completed.

There are few supporting parking spaces in the old community built in the city, the demand for residents’ parking is huge, the surrounding buildings are dense, and it is impossible to realize large-scale excavation for the construction of large parking garage.

Perspective view of garage structure the garage body adopts precast technology combined with open caisson sinking technology to complete the construction.

Application of 3bim technology for installation of sinking back sealing equipment the project has a small volume but complete internal organs.

4) Pour reinforced concrete into the inner cavity of the standard layer at one time and continue to excavate until the shaft of this layer sinks in place; 5) Repeat steps 3) and 4) to install other layers of the shaft until the shaft sinks to the preset depth of 17.05m layer by layer; The bottom of the caisson is plain concrete bottom sealing, reinforced concrete bottom plate and ballast concrete respectively; 7) Main steel structure and equipment installation.

6) The progress of the project is fast, and the progress of the precast open caisson garage is about 50% faster than that of the traditional way.

Authorized source: Xiamen precast building development promotion platform ID: xmzpjz is invested and constructed by Xiamen Haicang Urban Construction Group Co., Ltd.

1.

First, the number of motor vehicles has increased, and the contradiction between supply and demand of parking spaces is prominent; Second, the planned parking spaces are seriously insufficient; Third, there is a shortage of land resources and it is difficult to provide land for parking facilities; Fourth, the parking management system is lack of overall planning.

1 R & D background and overview in recent years, the number of motor vehicles has increased rapidly, which has a prominent contradiction with the lagging construction of urban parking facilities.

Therefore, making full use of underground space scientifically and reasonably will inevitably become a trend and effective way to solve the “parking difficulty”.

It is a practical project to study and solve the parking problems of old communities and commercial blocks.

During assembly, they are continuously welded to form closed joints.

the first precast caisson underground mechanical parking garage in China jointly contracted by Xiamen Haitou Engineering Construction Co., Ltd., Xiamen Municipal Engineering Design Institute Co., Ltd.

BIM application 4 innovative advantages this project is invested and constructed by Haicang urban construction group.

Steel plates are embedded at the edge of each component.

As a pilot project, each depot is designed with 10 parking spaces, 5 floors underground and 50 parking spaces.

3) The cylindrical structure is adopted, with uniform stress, reinforced concrete pouring in the inner cavity, good integrity, safe structure, no support, improved excavation efficiency and convenient for construction personnel to work in the well.

The combination of the two construction methods is innovative [precast + open caisson sinking method] 1) open caisson sinking is generally used in the bridge field, and usually adopts cast-in-situ construction, with small warehouse receipts.