CN109847252B

CN109847252B - Temporary fire-fighting construction method in large public building construction

Info

Publication number: CN109847252B
Application number: CN201910037966.5A
Authority: CN
Inventors: 王志强; 陈明宝
Original assignee: China MCC17 Group Co Ltd
Current assignee: China MCC17 Group Co Ltd
Priority date: 2019-01-16
Filing date: 2019-01-16
Publication date: 2021-04-09
Anticipated expiration: 2039-01-16
Also published as: CN109847252A

Abstract

The invention relates to the field of building construction, in particular to a construction method for temporary fire protection in large public building construction. Synchronously installing fire-fighting pipes during raft foundation construction, and changing conventional open construction into pre-buried fire-fighting pipes; raft foundation outside installation fire pump station, direct and bury the fire control in raft foundation plate in person in charge and be connected, vertically with transversely lay the main line, stretch out raft foundation's vertical branch pipe installation gate valve, horizontal branch pipe sets up the tee bend, gate valve and fire hose, install the vertical branch pipe of fire control earlier before the construction of concrete floor platform, through concrete stair, the interior space of barrel or shaft is as the strong point of vertical fire hose, every layer is horizontal branch pipe respectively and sets up tee bend and gate valve and fire hose, every layer is accomplished the upper portion construction in proper order. The invention is simple and practical, saves the space of a construction site, can be repeatedly used for many times, saves working hours and reduces the cost.

Description

Temporary fire-fighting construction method in large public building construction

Technical Field

The invention relates to the field of building construction, in particular to a construction method for temporary fire protection in large public building construction.

Background

In 6-9 months of the summer of the Kowitt, the construction is usually carried out under the conditions of high temperature, no rain and dry construction, the projects which are easy to cause fire hazard are not few in the field welding in the construction process, a floor platform is usually erected by DOKA and PERI supporting frames in the construction of the structure above a raft foundation, and I-shaped wood and plywood are adopted for the construction of the platform and a column template; in the construction process, the temporary fire fighting system lags behind the stage of a main structure, particularly the periphery of a basement structure is closed and has small space, the template construction of structural concrete is neglected slightly, and a fire easily occurs, once the fire occurs, the temporary fire fighting pipe is not installed or the covering structure construction is not updated, the use of fire fighting facilities and the passing of fire fighting vehicles are influenced, and the fire can not be extinguished at the first time and can not enter the rescue; when the fire engine enters a construction site, the fire spread is caused, the fire cannot be effectively controlled, and only after people are evacuated urgently, the fire is automatically extinguished, so that huge economic loss and construction period loss are caused to engineering projects.

Disclosure of Invention

Aiming at the technical problems in the prior art, the invention aims to provide a temporary fire-fighting construction method in large-scale public building construction. In order to achieve the purpose, the technical scheme adopted by the invention is as follows:

a construction method for temporary fire protection in large public building construction comprises the following specific steps:

step 1, designing pipe diameter and distribution points, and calculating and determining pipe diameter and water pump parameters of a fire-fighting system according to fire-fighting specifications and by combining with the characteristics of project floors; selecting diameters of a main pipe and a branch pipe, arranging a pipeline plane, arranging a fire box and a fire pump station plane, and reporting approval of an authority department;

step 2, synchronously embedding a fire-fighting main pipe during the concrete pouring construction of the raft foundation, and changing the conventional open construction into the embedded fire-fighting main pipe; the fire control is responsible for and installs in concrete raft foundation structure, and the fire control is responsible for and is connected with vertical branch pipe, and the fire control is responsible for and places between concrete raft foundation upper strata and lower floor's reinforcing bar, is close to upper reinforcing bar, installation steel support, will reserve during concrete raft foundation block construction and extend the end pipe and adopt the steel flange blind plate to seal, makes the mark, stretches out concrete raft foundation 800mm department installation gate valve and horizontal branch pipe and set up tee bend, gate valve and fire control box at vertical branch pipe.

Step 3, arranging vertical fire fighting pipe supporting points in gaps among the concrete stairs, the barrel and the vertical shaft of the structure above the basement concrete raft foundation, extending fire fighting vertical branch pipes and installing gate valves during upper structure construction each time, and arranging a tee joint, a gate valve and a fire fighting box on each layer of horizontal branch pipe; the lower part is fixed with a connecting platform or a wall at the position of a poured concrete stair, a cylinder and a vertical shaft, and a horizontally arranged pipeline is hung below a concrete floor platform or on a concrete column which is locally provided with no concrete stair, cylinder and vertical shaft.

And 4, extending the fire main pipe and the vertical branch pipes out of the raft foundation surface and the platform surface of each concrete floor, installing gate valves on the vertical branch pipes, arranging tee joints, gate valves and fire boxes on the horizontal branch pipes, connecting the horizontal branch pipes by flanges, installing the gate valves containing flanges on the assembled vertical branch pipes on the floor, and lifting and installing the gate valves by a tower crane.

Step 5, combining fixed and movable modular designs of the fire pump station, connecting the fixed fire pump with a fire main pipe pre-embedded in a concrete raft foundation, determining the basic capacity of a water tank of the fire pump station, and ensuring that the fire pump is always in an emergency state; the movable standby fire pump is additionally arranged, fire pipelines of each independent building are connected in series to play a supplementary role when the movable standby fire pump is added along with floors or under the condition of rapidly assembling fire pump sites and a multi-head fire pump station, and a main power supply and a standby generator are adopted as a power supply of the fire pump station, and the main power supply and the standby generator can be automatically switched.

Step 6, performing pressure test on the fire pipeline, and performing subsection pressure test check on the pre-buried pipeline before pouring concrete on the raft foundation to ensure that no leakage exists; after the distribution pipe is installed, the loop is subjected to pipeline pressure testing, water pump test operation and system load drilling, and whether the outlet pressure of the tail-end fire hydrant meets the design requirements is checked.

And 7, combining the temporary fire protection system and the permanent fire protection system after the construction of the upper part is finished, removing the fire protection pipes above the concrete raft foundation in a sectional and layered manner, and performing pressure filling on fine stone concrete in the concrete raft foundation.

Preferably, in step 2, the main fire fighting pipe is connected with the vertical branch pipe by welding or screwing.

Preferably, in the step 2, the steel brackets are fixedly bound at intervals of 2.5 m.

The whole construction process is simple, convenient and practical, the temporary fire fighting pipe can be installed to perform vertical cross parallel construction operation, the space of a construction site is saved, the single group of fire fighting branch pipes of the standard layer are assembled on the floor surface once and repeatedly used for many times, the working time is saved, the cost is reduced, the template construction and concrete pouring fire fighting safety is guaranteed, the engineering quality is guaranteed, and the construction is safe and reliable.

Drawings

FIG. 1 is a schematic diagram of temporary fire-fighting arrangement in raft foundation

FIG. 2 is a sectional view of a vertical supporting pipe

In fig. 1 and 2: 1. a concrete cushion; 2. reinforcing steel bars; 3. a steel bracket; 4. a fire chief; 5. a horizontal branch pipe 6, a gate valve; 7. a vertical branch pipe; 8. a concrete column; 9. a raft foundation; 10. a concrete floor platform; 11. a water tank of a fire pump station; 12. a fire pump station; 13. connecting the platform; 14. concrete stairs

Detailed Description

To further describe the construction method for temporary fire protection in large public building construction according to the present invention, the following description will be made with reference to the accompanying drawings.

In fig. 1 and 2, a construction method for temporary fire protection in large-scale public building construction specifically includes the following steps:

step 2, synchronously embedding a fire-fighting main pipe 4 on the concrete cushion layer 1 when the raft foundation 9 is cast with concrete, and changing the conventional open construction into the embedded fire-fighting main pipe; the fire control is responsible for and installs in raft foundation 9 structure that the concrete was built, fire control is responsible for 4 and is connected with vertical branch 7 and adopts welding or screw thread, fire control is responsible for 4 and places between raft foundation 9 upper strata and lower floor's reinforcing bar 2, be close to upper reinforcing bar 2, every 2.5m fixed mounting steel support 3, raft foundation 9 piecemeal construction will be reserved and extend the end pipe and adopt the steel flange blind plate to seal, make the mark, 800mm department installation gate valve 6 and horizontal branch 5 and set up the tee bend that stretch out raft foundation 9 at vertical branch 7, gate valve 6 and fire hose.

Step 3, arranging vertical fire-fighting pipe supporting points in gaps among the concrete stairs 14, the barrel and the vertical shaft in the structure above the basement raft foundation 9, firstly extending a fire-fighting vertical branch pipe 7 and installing a gate valve 6 during each upper structure construction, and arranging a tee joint, the gate valve 6 and a fire-fighting box on each layer of horizontal branch pipe; the lower part is fixed with a connecting platform or a wall at the position of a poured concrete stair 14, a cylinder and a vertical shaft to form a vertical branch pipe 7, and a horizontally arranged pipeline is hung below a concrete floor platform 10 or on a concrete column 8 without the concrete stair 14, the cylinder and the vertical shaft locally.

Step 4, the fire-fighting main pipe 4 and the vertical branch pipes 7 extend out of the raft foundation surface and the platform surface of each concrete floor, the gate valves 6 are installed on the vertical branch pipes 7, the horizontal branch pipes are provided with tee joints, gate valves and fire-fighting boxes, the tee joints, the gate valves 6 containing flanges are installed on the building ground assembled vertical branch pipes 7, and the building ground assembled vertical branch pipes are lifted and installed by a tower crane.

Step 5, combining a fixed modular design and a movable modular design of a fire pump station 12, connecting the fixed fire pump with a fire main pipe 4 pre-embedded in a raft foundation 9, determining the basic capacity of a water tank 11 of the fire pump station, and ensuring that the fire pump is always in an emergency state; the movable standby fire pump is additionally arranged, fire pipelines of each independent building are connected in series to play a supplementary role when the number of floors is increased or the fire pump is rapidly assembled on site and under the condition of a multi-head fire pump station, and a power supply of the fire pump station 12 adopts a main power supply and two power supplies of a standby generator, and the main power supply and the standby generator can be automatically switched.

Step 6, performing pressure test on the fire pipeline, and performing subsection pressure test on the pre-buried pipeline before pouring concrete on the raft foundation 9 to ensure that no leakage exists; after the distribution pipe is installed, the loop is subjected to pipeline pressure testing, water pump test operation and system load drilling, and whether the outlet pressure of the tail-end fire hydrant meets the design requirements is checked.

And 7, combining the temporary fire protection system and the permanent fire protection system after the construction of the upper part is finished, removing the fire protection pipes above the raft foundation 9 in a sectional and layered manner, and performing pressure filling on fine stone concrete in the raft foundation 9.

The working principle is as follows: synchronously installing fire-fighting pipes during raft foundation construction, and changing conventional open construction into pre-buried fire-fighting pipes; raft foundation outside installation fire pump station, direct and bury the fire control in raft foundation plate in person in charge and be connected, vertically with transversely lay the main line, stretch out raft foundation's vertical branch pipe installation gate valve, horizontal branch pipe sets up the tee bend, gate valve and fire hose, install the vertical branch pipe of fire control earlier before the construction of concrete floor platform, through concrete stair, the interior space of barrel or shaft is as the strong point of vertical fire hose, every layer is horizontal branch pipe respectively and sets up the tee bend, gate valve and fire hose, exceed template construction platform 800mm, the vertical branch pipe installation gate valve of fire control contains the ring flange and accomplishes at building ground equipment, promote the installation by the tower crane, every layer is accomplished the upper portion construction in proper order.

The foregoing is merely exemplary and illustrative of the principles of the present invention and various modifications, additions and substitutions of the specific embodiments described herein may be made by those skilled in the art without departing from the principles of the present invention or exceeding the scope of the claims set forth herein.

Claims

1. A construction method for temporary fire protection in large public building construction is characterized by comprising the following steps:

step 1, designing pipe diameter and distribution points, and calculating and determining pipe diameter and water pump parameters of a fire-fighting system according to fire-fighting specifications and by combining with the characteristics of project floors; selecting diameters of a fire main pipe, a vertical branch pipe and a horizontal branch pipe, arranging a pipeline plane, arranging a fire box and arranging a fire pump station plane, and reporting approval of an authority department;

step 2, synchronously embedding a fire-fighting main pipe during the concrete pouring construction of the raft foundation, and changing the conventional open construction into the embedded fire-fighting main pipe; the main fire fighting pipe is arranged in the raft foundation structure and is connected with the vertical branch pipe, the main fire fighting pipe is placed between the upper layer reinforcing steel bars and the lower layer reinforcing steel bars of the raft foundation and is close to the upper layer reinforcing steel bars, the steel support is arranged, the reserved extension end head pipe is sealed by adopting a steel flange blind plate during the block construction of the raft foundation, the mark is made, and a gate valve and a horizontal branch pipe are arranged at the position where the vertical branch pipe extends out of the concrete raft foundation by 800mm, and a tee joint, a gate valve and a fire box are arranged;

step 3, arranging vertical fire-fighting pipe supporting points in gaps among the concrete stairs, the barrel and the vertical shaft, extending the vertical branch pipes and installing gate valves during upper structure construction each time, and arranging a tee joint, a gate valve and a fire-fighting box on each layer of horizontal branch pipe; the lower part is fixed with a connecting platform or a wall at the position of a poured concrete stair, a cylinder and a vertical shaft, and a horizontally arranged pipeline is hung under a concrete floor platform or on a concrete column which is locally provided with no concrete stair, cylinder and vertical shaft;

step 4, the fire-fighting main pipe and the vertical branch pipes extend out of the raft foundation surface and the platform surface of each layer of concrete floor, the vertical branch pipes are provided with gate valves, the horizontal branch pipes are provided with tee joints, gate valves and fire boxes, the tee joints, the gate valves and the fire boxes are connected through flanges, the gate valves containing the flanges are installed after the vertical branch pipes are assembled on the floor surface, and the gate valves are lifted and installed through a tower crane;

step 5, combining a fixed modular design and a movable modular design of the fire pump station, connecting the fixed fire pump with a fire main pipe pre-embedded in a raft foundation, determining the basic capacity of a water tank of the fire pump station, and ensuring that the fire pump is always in an emergency state; a mobile standby fire pump is additionally arranged, fire pipelines of all buildings are connected in series and communicated to play a supplementary role when the number of floors is increased or under the condition that a fire pump is rapidly assembled on site with a multi-head fire pump station, and a fire pump station power supply adopts two power supplies, namely a main power supply and a standby generator, and can be automatically switched between the main power supply and the standby generator;

step 6, performing pressure test on the fire main pipe, the vertical branch pipe and the horizontal branch pipe, and performing segmented pressure test check on the pre-buried fire main pipe before pouring concrete on the raft foundation to ensure that no leakage exists; after the vertical branch pipe and the horizontal branch pipe are installed, the loop is subjected to pipeline pressure test, a water pump is operated in a trial mode, system load is exercised, and whether the outlet pressure of the tail-end fire hydrant meets the design requirement is checked;

and 7, combining the temporary fire protection with the permanent fire protection after the construction of the upper part is finished, dismantling the vertical branch pipes and the horizontal branch pipes above the raft foundation in a sectional and layered manner, and performing pressure filling on fine stone concrete in the raft foundation.

2. The construction method for temporary fire protection in large-scale public building construction according to claim 1, wherein in step 2, the main fire hose is connected with the vertical branch pipe by welding or screwing.

3. The construction method for temporary fire protection in large public building construction according to claim 1, wherein the steel brackets are fixedly bound every 2.5m in the step 2.