CN109707118B - Pre-buried arrangement mode and method for downpipe used as demolition blast hole in building periphery column - Google Patents

Pre-buried arrangement mode and method for downpipe used as demolition blast hole in building periphery column Download PDF

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Publication number
CN109707118B
CN109707118B CN201910048114.6A CN201910048114A CN109707118B CN 109707118 B CN109707118 B CN 109707118B CN 201910048114 A CN201910048114 A CN 201910048114A CN 109707118 B CN109707118 B CN 109707118B
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downpipe
building
column
peripheral
roof
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CN109707118A (en
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叶建军
陈飞
肖建庄
张晋
舒大强
程大春
吴巍
陈得良
尹仲
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Hubei University of Technology
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Hubei University of Technology
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Abstract

The invention relates to a pre-buried arrangement mode and a method of a downpipe which is also used as a demolition blast hole in a building peripheral column, wherein the downpipe of a flat roof or a sloping roof building is pre-buried in the peripheral column, the middle section of the downpipe is parallel to a long axis of the building peripheral column, the lower end of the downpipe extends out of the top of the column or the outer side surface of the column through a connecting pipe of an elbow, the upper end of the downpipe is connected with a floor drain arranged at the bottom of a gutter or an eave ditch through a funnel, and the lower end of the downpipe is connected with a pipeline extending out of the outer. During construction, erecting a reinforcement cage of a peripheral column of a building, erecting a first section of downpipe in the reinforcement cage, exposing the lower end of the downpipe, and pouring concrete by using a supporting template; repeating the above construction; and erecting a downpipe until a reinforcement cage of the peripheral column of the top-storey building is erected, wherein the upper end of the downpipe is connected with a floor drain arranged on the roof. The invention improves the appearance of the building, prolongs the service time of the downpipe and avoids the later maintenance; the blast hole can be used as a blast hole for breaking and removing the building peripheral column in the future.

Description

Pre-buried arrangement mode and method for downpipe used as demolition blast hole in building periphery column
Technical Field
The invention relates to the technical field of water falling systems and the field of blasting engineering, in particular to a pre-buried arrangement mode and a pre-buried arrangement method of a water falling pipe which is also used as a demolition blast hole in a peripheral column of a building
Background
In the process of blasting and dismantling the reinforced concrete column, the technology of dismantling the blast hole by using the pre-buried PVC pipe is utilized, for example: CN105091682B discloses a demolition blasting method for axial embedded blast holes of reinforced concrete columns. The technology can avoid drilling, reduce blasting demolition cost, has little influence on environment and has wide application prospect. The technology only considers the pre-buried hole as a blasting blast hole, does not describe the construction of the pre-buried pipe in detail, and does not consider the multi-purpose of the pre-buried pipe, and if the technology is used as a rainwater downpipe, the technology has little advantage in popularization and application.
In engineering construction, a downpipe (with a diameter of about 110 mm) of a building is usually arranged on the side surface of an outer wall and fixed on the outer wall through a connecting piece. This arrangement has a number of disadvantages:
1. the downpipe is arranged on the side surface of the outer wall, and is easy to weather and have short service life when being blown by wind and sun; the air temperature is low in winter and is easy to freeze;
2. the downpipe connecting piece is easy to be corroded; the fixed block at the tail end of the connecting piece is easy to weather and corrode; being arranged on the outer wall is inconvenient for maintenance.
3. The downpipe is arranged on the side face of the outer wall, so that convenience is brought to lawless persons, thieves can climb up from the downpipe, and great potential safety hazards exist.
4. The downpipe is arranged on the side surface of the outer wall to influence the overall appearance.
If 40-60mm downpipe is pre-buried in the peripheral column, the method not only can solve the disadvantages, but also can be used as a blast hole for blasting demolition of reinforced concrete columns in the future, and can generate great economic benefit and social benefit.
Disclosure of Invention
The invention aims to provide a pre-buried arrangement mode and a method for a downpipe which is also used as a demolition blast hole in a peripheral column of a building, aiming at the current situation, wherein the pre-buried pipe can improve the appearance of the building, has long service life, does not need maintenance in the later period, can be used as a demolition blast hole in the future, and can obviously reduce demolition cost and influence on the environment.
The invention aims to realize that the downpipe which is also used as a demolition blast hole is pre-embedded in a building peripheral column, the middle section of the downpipe of a flat roof or a sloping roof building is pre-embedded in the building peripheral column, the middle section of the downpipe is parallel to the long axis of the building peripheral column, the upper end of the downpipe extends out of the top of the column or the outer side surface of the column through a pipe connected with two elbows and is connected with a floor drain arranged at the bottom of a downpipe ditch or a sloping roof eaves ditch on the flat roof through a funnel, and the lower end of the downpipe is connected with a pipeline extending out of the outer side surface of the column through a 135-degree elbow.
The method for pre-embedding the downpipe which is also used for dismantling blast holes in the peripheral columns of the building comprises the following steps of:
1) erecting a reinforcement cage of a peripheral column of a building, erecting a first section of downpipe in the reinforcement cage, connecting the lower end of the downpipe with a 135-degree elbow, binding the downpipe with thin iron wires at intervals of 1m along the height of the downpipe, and fixing the downpipe on a column longitudinal bar or a column hoop bar after tensioning to form a cross shape; then, a template is supported, and the lower end of the 135-degree elbow extends out of the template; the upper end of the downpipe is 20-30 cm higher than the top of the building peripheral column template, and an upper end opening is sealed by a plastic bag;
3) pouring concrete to the top of the column formwork around the first-floor building;
3) erecting a reinforcement cage with two layers of columns; uncovering the upper end seal of the downpipe, connecting a second section of downpipe by using a direct joint, fixing the downpipe by using a thin iron wire according to the step 1), and sealing the upper end opening of the second section of downpipe by using a plastic bag, wherein the upper end opening is 20-30 cm higher than the top of a peripheral column template of a second-storey building;
4) pouring concrete to the top of the column formwork around the second-storey building;
5) repeating the steps 2), 3) and 4), and finishing the construction of each layer to the top of the peripheral column of the building;
6) erecting a reinforcement cage of a column at the periphery of a top-storey building; and (2) uncovering the upper end seal of the downpipe, connecting the second section of downpipe to the top end of the peripheral column of the top-storey building by using a straight-through joint 5, fixing the downpipe by using a thin iron wire according to the step 1), connecting two 90-degree elbows or 135-degree elbows at the upper end of the downpipe, extending out of the top or side of the peripheral column of the building, and connecting the downpipe with a floor drain arranged at the bottom of a flat roof gutter or a sloping roof gutter through a funnel.
The arrangement of the downpipe is considered at the beginning of the design of the peripheral column, and particularly, the PVC pipe is pre-embedded to be used as the downpipe during the construction of the column, so that the downpipe is prevented from being hung on an outer wall and blown by wind and sun, and the service time of the downpipe is greatly prolonged; adverse factors such as easy corrosion and corrosion of the connecting piece are avoided, and maintenance and repair are not needed in the later period; anti-climbing measures are omitted, and safety is greatly improved; the pre-buried downpipe can be used as a blast hole for blasting demolition of surrounding columns of a building in the future, so that noise and dust pollution caused by drilling are avoided; has obvious economic benefit and social benefit.
By adopting the invention, the exposed hanging downpipe is changed into the embedded downpipe, so that the integral aesthetic effect of the building is improved.
Drawings
Figure 1 is an overall schematic view of the pre-buried arrangement of the flat roof downpipe,
figure 2 is a longitudinal section view of a flat roof downspout pre-embedded in a column,
figure 3 is an overall schematic view of the pre-buried arrangement of the downpipe of the pitched roof,
figure 4 is a longitudinal section view of the pipe in the column pre-buried in the pitched roof,
figure 5 is a plan layout view of a flat roof gutter floor drain,
figure 6 is a plan view of a slope roofing gutter floor drain,
figure 7 is a cross-sectional view of a downspout tie,
fig. 8 is a down pipe lashing diagram.
Detailed Description
The invention discloses a pre-buried arrangement mode of a downpipe which is also used as a demolition blast hole in a building peripheral column, wherein the middle section of the downpipe of a flat roof or a slope roof building is pre-buried in the building peripheral column, the middle section of the downpipe is parallel to a long shaft of the building peripheral column, the upper end of the downpipe extends out of the top of the column or the outer side surface of the column through a pipe connected with two elbows, the lower end of the downpipe is connected with a floor drain arranged at the bottom of a downpipe ditch or a slope roof eaves ditch on the flat roof through a funnel, and the lower end of the downpipe is connected with a pipeline extending out of.
The present invention is described in detail below with reference to the accompanying drawings.
Referring to fig. 1, 2 and 5, the pre-buried arrangement mode of the downpipe which is also used as a demolition blast hole in the building surrounding column 8 is that the middle section of the downpipe 4 of the flat roof is pre-buried along the axial direction of the central axis of the building surrounding column 8, the middle section of the downpipe is parallel to the long axis of the building surrounding column, the upper end of the downpipe extends out of the top of the column through the pipe connected with two 90-degree elbows 3, the downpipe is connected with a floor drain 1 arranged at the bottom of a gutter 7 through a funnel 2, and the flat section part between the two 90-degree elbows 3 is pre-buried in the roof panel of the flat roof and. The lower end of the downpipe is connected with a pipe extending out of the outer side surface of the column by a 135-degree elbow.
The beam 10 and the floor 11 are arranged in the middle of the building peripheral column.
Referring to fig. 3, 4 and 6, the pre-buried arrangement mode of the downpipe which is also used as a demolition blast hole in the peripheral column 8 of the building is that the middle section of the downpipe 4 of the pitched roof is pre-buried along the axial direction of the central axis of the peripheral column 8 of the building, the middle section of the downpipe is parallel to the long axis of the peripheral column of the building, the upper end of the downpipe extends out of the outer side surface of the column through two pipes connected by 135-degree elbows 6, and is connected with a floor drain 1 arranged at the bottom of a gutter 16 through a funnel 2, and the lower end of the downpipe is connected with the pipe extending.
The embedded downpipe is a PVC plastic pipe with the pipe diameter of 40-60 mm.
The method for pre-embedding the downpipe which is also used for dismantling blast holes in the peripheral columns of the building comprises the following steps of:
1) erecting a reinforcement cage of a peripheral column of a building, erecting a first section of downpipe in the reinforcement cage, connecting the lower end of the downpipe with a 135-degree elbow, binding the downpipe with thin iron wires at intervals of 1m along the height of the downpipe, and fixing the downpipe on a column longitudinal bar or a column hoop bar after tensioning to form a cross shape; then, a template is supported, and the lower end of the 135-degree elbow extends out of the template; the upper end of the downpipe is 20-30 cm higher than the top of the building peripheral column template, and an upper end opening is sealed by a plastic bag;
4) pouring concrete to the top of the column formwork around the first-floor building;
3) erecting a reinforcement cage with two layers of columns; uncovering the upper end seal of the downpipe, connecting a second section of downpipe by using a direct joint, fixing the downpipe by using a thin iron wire according to the step 1), and sealing the upper end opening of the second section of downpipe by using a plastic bag, wherein the upper end opening is 20-30 cm higher than the top of a peripheral column template of a second-storey building;
4) pouring concrete to the top of the column formwork around the second-storey building;
5) repeating the steps 2), 3) and 4), and finishing the construction of each layer to the top of the peripheral column of the building; the middle section of the downpipe is parallel to the long axis of the surrounding columns of the building.
6) Erecting a reinforcement cage of a column at the periphery of a top-storey building; and (2) uncovering the upper end seal of the downpipe, connecting the second section of downpipe to the top end of the peripheral column of the top-storey building by using a straight-through joint 5, fixing the downpipe by using a thin iron wire according to the step 1), connecting two 90-degree elbows or 135-degree elbows at the upper end of the downpipe, extending out of the top or side of the peripheral column of the building, and connecting the downpipe with a floor drain arranged at the bottom of a flat roof gutter or a sloping roof gutter through a funnel.
The thin iron wire is used for binding the downpipe in the step 1) by two methods: one is as shown in fig. 8, two thin iron wires are respectively wound on the pipe body for a plurality of circles and are wound on the longitudinal bars or the stirrups at two sides after being tensioned to form a cross shape, and the thin iron wires are bound once at intervals of 1m along the height of the pipe body. The other type is as shown in figure 7, four thin iron wires are respectively bound and tensioned with the pipe body and then fixed on four longitudinal bars or stirrups to form a cross shape, and the binding is carried out once every 1m along the height of the pipe body.
The cross section of the gutter 7 in the step 6) is U-shaped, and the gutter is arranged on the inner side of the parapet 9 along the periphery of the roof panel to collect and allocate rainwater. The cross section of the eaves gutter 16 is U-shaped, and the eaves gutter is arranged on two sides of the outer side of the eaves to collect and allocate rainwater.
The present invention is described in detail below with reference to specific examples.
Example 1
A certain three-storey building with the height of 9.8m and the storey height of 3m, a flat roof 17, a parapet 9 arranged on the roof, a gutter 7 arranged on the roof, and reinforced concrete columns at the periphery of the building with the size of 0.4m multiplied by 9 m. The concrete steps of pre-burying and arranging the downpipe which is also used for removing blast holes in the surrounding columns of the building are as follows:
1) erecting a reinforcement cage of a peripheral column of a building, erecting a first section of downpipe 4 with the diameter of 40mm in the reinforcement cage frame, connecting the lower end of the downpipe with a 135-degree elbow 6, binding the downpipe with thin iron wires 15 at intervals of 1m along the height of the downpipe (see figure 8), and fixing the downpipe on four longitudinal columns 14 or column hoops 13 after tensioning to form a cross shape. Then, a template is supported, and the lower end of the 135-degree elbow extends out of the template; the upper end of the downpipe is 20-30 cm higher than the top of the building peripheral column template, and an upper end opening is sealed by a plastic bag;
2) pouring concrete to the top of the column formwork around the first-floor building;
3) erecting a reinforcement cage with two layers of columns; uncovering the upper end seal of the downpipe, connecting a second section of downpipe by using a direct joint 5, fixing the downpipe by using fine iron wires according to the step 1), and sealing the upper end opening of the second section of downpipe by using a plastic bag, wherein the upper end opening is 20-30 cm higher than the top of a peripheral column template of a second-storey building;
4) pouring concrete to the top of the column formwork around the second-storey building; the middle section of the downpipe is parallel to the long axis of the surrounding columns of the building.
5) Erecting reinforcement cages of peripheral columns of a three-storey building; and (2) uncovering the upper end seal of the downpipe, connecting a third section of the downpipe to the top end of a peripheral column of the three-storey building by using a straight-through joint 5, fixing the downpipe by using a thin iron wire according to the step 1), connecting the upper end of the downpipe with two 90-degree elbows 3, extending out of the top of the peripheral column of the building, connecting the downpipe with a floor drain 1 arranged at the bottom of a gutter 7 through a funnel 2, and embedding a straight section between the two 90-degree elbows 3 in a roof panel of a flat roof 17 in parallel with the roof panel.
Example 2, a building with a height of 9.8m and a height of 3m on a certain three-storey, a sloping roof 12, and eaves 16 arranged outside eaves, wherein the size of reinforced concrete columns around the building is 0.4m multiplied by 9 m.
1) Erecting a reinforcement cage of a building peripheral column, erecting a first section of downpipe 4 with the diameter of 40mm in the reinforcement cage, connecting the lower end of the downpipe with a 135-degree elbow 6, binding the downpipe with thin iron wires at intervals of 1m along the height of the building peripheral pipe body, and fixing the downpipe on four column longitudinal ribs 14 or column hoop ribs 13 after tensioning to form a cross shape; then, a template is supported, and the lower end of the 135-degree elbow extends out of the template; the upper end of the downpipe is 20-30 cm higher than the top of the building peripheral column template, and an upper end opening is sealed by a plastic bag;
2) pouring concrete to the top of the column formwork around the first-floor building;
3) erecting reinforcement cages of peripheral columns of a two-storey building; uncovering the upper end seal of the downpipe, connecting a second section of downpipe by using a direct joint 5, fixing the downpipe by using fine iron wires according to the step 1), and sealing the upper end opening of the second section of downpipe by using a plastic bag, wherein the upper end opening is 20-30 cm higher than the top of a peripheral column template of a second-storey building;
4) pouring concrete to the top of the column formwork around the second-storey building;
5) erecting reinforcement cages of peripheral columns of a three-storey building; uncovering the upper end seal of the downpipe, connecting a third section of the downpipe by using a straight-through joint, fixing the downpipe by using a thin iron wire according to the mode of the step 1), erecting the downpipe until the top end of the three-layer column is 20-30 cm below, connecting the upper end of the downpipe by using two 135-degree elbows, extending out of the side face of the column, and connecting the upper end of the downpipe with a floor drain 1 arranged at the bottom of the eaves gutter 16 through a funnel.
The arrangement of the downpipe is considered at the beginning of the design of the peripheral column, and particularly, the PVC pipe is pre-embedded to be used as the downpipe during the construction of the column, so that the downpipe is prevented from being hung on an outer wall and blown by wind and sun, and the service time of the downpipe is greatly prolonged; adverse factors such as easy corrosion and corrosion of the connecting piece are avoided, and maintenance and repair are not needed in the later period; anti-climbing measures are omitted, and safety is greatly improved; the pre-buried downpipe can be used as a blast hole for breaking and removing the peripheral columns of the building in the future, so that noise and dust pollution caused by drilling are avoided; has obvious economic benefit and social benefit.
By adopting the invention, the exposed hanging downpipe is changed into the embedded downpipe, so that the integral aesthetic effect of the building is improved.

Claims (5)

1. The method is also used as a pre-buried arrangement mode of the downpipe for removing blast holes in the surrounding columns of the building, and is characterized in that: the middle section of a downpipe of a flat roof or slope roof building is embedded in a peripheral column of the building, the middle section of the downpipe is parallel to a long shaft of the peripheral column of the building, the upper end of the downpipe extends out of the outer side surface of the column top or the outer side surface of the column through a pipe connected with two elbows and is connected with a floor drain arranged at the bottom of a downpipe ditch or a slope roof eaves ditch of the flat roof by a funnel, and the lower end of the downpipe is connected with a pipeline extending out of the outer side surface of the column by adopting a 135-;
the downpipe is embedded in a segmented manner according to the construction progress of surrounding columns of the building, and the method comprises the following specific steps:
1) erecting a reinforcement cage of a peripheral column of a building, erecting a first section of downpipe in the reinforcement cage, connecting the lower end of the downpipe with a 135-degree elbow, binding the downpipe with thin iron wires at intervals of 1m along the height of the downpipe, and fixing the downpipe on a column longitudinal bar or a column hoop bar after tensioning to form a cross shape; then, a template is supported, and the lower end of the 135-degree elbow extends out of the template; the upper end of the downpipe is 20-30 cm higher than the top of the building peripheral column template, and an upper end opening is sealed by a plastic bag;
2) pouring concrete to the top of the column formwork around the first-floor building;
3) erecting a reinforcement cage with two layers of columns; uncovering the upper end seal of the downpipe, connecting a second section of downpipe by using a direct joint, fixing the downpipe by using a thin iron wire according to the step 1), and sealing the upper end opening of the second section of downpipe by using a plastic bag, wherein the upper end opening is 20-30 cm higher than the top of a peripheral column template of a second-storey building;
4) pouring concrete to the top of the column formwork around the second-storey building;
5) repeating the steps 2), 3) and 4), and finishing the construction of each layer to the top of the peripheral column of the building;
6) erecting a reinforcement cage of a column at the periphery of a top-storey building; and (2) uncovering the upper end seal of the downpipe, connecting the second section of downpipe to the top end of the peripheral column of the top-storey building by using a straight-through joint 5, fixing the downpipe by using a thin iron wire according to the step 1), connecting two 90-degree elbows or 135-degree elbows at the upper end of the downpipe, extending out of the top or side of the peripheral column of the building, and connecting the downpipe with a floor drain arranged at the bottom of a flat roof gutter or a sloping roof gutter through a funnel.
2. The pre-buried arrangement mode of the downpipe doubling as a demolition blast hole in the building perimeter column according to claim 1 is characterized in that: the straight section part between two 90-degree elbows at the upper end of the downpipe is pre-embedded in the flat roof panel and is parallel to the roof panel.
3. The pre-buried arrangement mode of the downpipe doubling as a demolition blast hole in the building perimeter column according to claim 1 is characterized in that: the downpipe is a PVC plastic pipe with the pipe diameter of 40-60 mm.
4. The pre-buried arrangement mode of the downpipe doubling as a demolition blast hole in the building perimeter column according to claim 1 is characterized in that: the cross section of the gutter of the flat roof in the step 6) is U-shaped and is arranged along the periphery of the roof board on the inner side of the parapet.
5. The pre-buried arrangement mode of the downpipe doubling as a demolition blast hole in the building perimeter column according to claim 1 is characterized in that: and 6) arranging the eaves gutter of the sloping roof in the step 6) at two sides of the outer side of the eaves, wherein the cross section of the eaves gutter is U-shaped.
CN201910048114.6A 2019-01-18 2019-01-18 Pre-buried arrangement mode and method for downpipe used as demolition blast hole in building periphery column Active CN109707118B (en)

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Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN201381592Y (en) * 2009-01-06 2010-01-13 贵阳铝镁设计研究院 Concrete column structure with pre-embedded rainfall pipe
CN201347603Y (en) * 2009-01-08 2009-11-18 山东科技大学 Hollow concrete-filled tubular column
CN105091682B (en) * 2015-07-01 2016-11-16 叶建军 The axial pre-buried big gun hole of reinforced column and demolition blasting method
CN104964623B (en) * 2015-07-01 2017-01-11 叶建军 Large-area or large-volume concrete pre-buried blast hole arrangement method and blasting demolition method
CN104964624B (en) * 2015-07-01 2018-05-22 湖北工业大学 Reinforced beam axially pre-buried blasthole and demolition blasting method

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