CN206279537U - For the pre-groove of deep foundation pit reinforced concrete support beam demolition blasting - Google Patents
For the pre-groove of deep foundation pit reinforced concrete support beam demolition blasting Download PDFInfo
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- CN206279537U CN206279537U CN201621385956.9U CN201621385956U CN206279537U CN 206279537 U CN206279537 U CN 206279537U CN 201621385956 U CN201621385956 U CN 201621385956U CN 206279537 U CN206279537 U CN 206279537U
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- groove
- reinforced concrete
- support beam
- foundation pit
- concrete support
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Abstract
The utility model is related to a kind of pre-groove for deep foundation pit reinforced concrete support beam demolition blasting.Its technical scheme is：In the deep foundation pit reinforced concrete support beam of dismounting to be blasted（1）The basement rock of underface（3）One demolition blasting pre-groove of middle excavation（2）, the demolition blasting pre-groove（2）Longitudinal centre line and the dismounting to be blasted deep foundation pit reinforced concrete support beam（1）Longitudinal centre line it is parallel, the demolition blasting pre-groove（2）Longitudinal centre line and the dismounting to be blasted deep foundation pit reinforced concrete support beam（1）Longitudinal centre line be located at same vertical guide on.The demolition blasting pre-groove（2）Cross section be inverted trapezoidal, wherein：The top width of inverted trapezoidala 1=a+Δa 1, the bottom width of inverted trapezoidala 2=a+Δa 2, the height of inverted trapezoidalb 1=Δb；The demolition blasting pre-groove（2）LengthL 1=L+ΔL.The utility model has the characteristics of constructing good convenient, explosion and crushing effect, low explosive specific charge and small blasting vibration intensity.
Description
Technical field
The utility model belongs to deep foundation pit reinforced concrete support beam demolition blasting preconditioning technique field.Specifically related to one
Plant the pre-groove for deep foundation pit reinforced concrete support beam demolition blasting.
Background technology
With continuing to develop for Process of Urbanization Construction, various large deep foundation pits also increase therewith, Brace in Deep Footing Groove beam dismounting amount
Also constantly increase.Current supporting removal method mainly has following several：Artificial pneumatic pick dismounting method, static crushing method, big machinery
(pick machine) dismounting method, demolition blasting method etc..Artificial pneumatic pick remove for a large amount of, big cross section reinforced concrete member the duration compared with
It is long；The static crushing concrete higher to amount containing muscle, crushing effect is poor；Big machinery (pick machine) though the broken safety of dismounting method
And efficiency high, but limited by span height, it is difficult to construct, and basement bottom board and floor strength be not enough to bear machinery from
Weight and powerful impulsive force.
Demolition blasting method have remove short time limit, fast, the recyclable waste steel bar and the characteristics of economize on resources of slagging tap, exist at present
Reinforced concrete brace is most widely used when removing.But, when reinforced concrete brace is removed using blasting procedure, such as
If without rational demolition blasting pretreatment measure, meticulous design and construction and strict safeguard procedures, it will produce stronger
Explosion negative effect, jeopardize foundation ditch itself and close to buildings stabilization, or even can lead to and personal safety accident and cause huge
Economic loss.
The content of the invention
The utility model is intended to overcome prior art defect, it is therefore intended that provide a kind of convenient, explosion and crushing effect of constructing
The good, pre-groove for deep foundation pit reinforced concrete support beam demolition blasting that explosive specific charge is low and blasting vibration intensity is small.
To realize above-mentioned task, the technical solution adopted in the utility model is：In the deep foundation pit reinforced mixed of dismounting to be blasted
Excavate a demolition blasting pre-groove in basement rock immediately below solidifying soil support beam, the demolition blasting pre-groove it is vertical
, the demolition blasting parallel with the longitudinal centre line of the deep foundation pit reinforced concrete support beam of the dismounting to be blasted to center line
With the longitudinal centre line position of the longitudinal centre line of pre-groove and the deep foundation pit reinforced concrete support beam of the dismounting to be blasted
In on same vertical guide.
The longitudinal length of the deep foundation pit reinforced concrete support beam of the dismounting to be blasted isL, the width of cross section × a height ofa × b 。
The cross section of the demolition blasting pre-groove is inverted trapezoidal, wherein：
The top width of inverted trapezoidal isa 1
a
1= a +Δa 1（1）
The bottom width of inverted trapezoidal isa 2
a
2= a +Δa 2（2）
Inverted trapezoidal it is a height ofb 1
b
1=Δb（3）
The length of the demolition blasting pre-groove isL 1
L
1=L +ΔL（4）
In formula (1), formula (2), formula (3) and formula (4)：
LRepresent the longitudinal length of the deep foundation pit reinforced concrete support beam of dismounting to be blasted, m；
aRepresent the cross-sectional width of the deep foundation pit reinforced concrete support beam of dismounting to be blasted, m；
bRepresent the cross-sectional height of the deep foundation pit reinforced concrete support beam of dismounting to be blasted, m；
ΔLRepresent that explosion is disassembled and used the length accentuation of pre-groove, ΔL=0.1~0.5m；
Δa 1Represent that explosion is disassembled and used the top width accentuation in pre-groove inverted trapezoidal section, Δa 1=0.2~0.7m；
Δa 2Represent that explosion is disassembled and used the bottom width accentuation in pre-groove inverted trapezoidal section, Δa 2=0.1~0.4m；
ΔbRepresent that explosion is disassembled and used the height in pre-groove inverted trapezoidal section, Δb=0.15~0.35m.
Due to using above-mentioned technical proposal, the utility model has following good effect compared with prior art：
The utility model before deep foundation pit reinforced concrete support beam demolition blasting, the deep basal pit steel according to dismounting to be blasted
The size of reinforced concrete support beam, the in advance basement rock immediately below the deep foundation pit reinforced concrete support beam of the dismounting to be blasted
In take a demolition blasting pre-groove so that the underface of the deep foundation pit reinforced concrete support beam for dismounting to be blasted
Free face is created that, the clamping action that basement rock treats the deep foundation pit reinforced concrete support beam of demolition blasting is reduced, beneficial to carrying
The demolition blasting effect of the deep foundation pit reinforced concrete support beam of dismounting to be blasted high；Explosive specific charge and blasthole can be reduced simultaneously
Number, reduces explosive cost, shortens the demolition blasting duration；
Demolition blasting pre-groove can take basement rock (3) and complete pretreatment work by machinery, and simple to operate, construction is just
It is prompt；Demolition blasting pre-groove can cut off Explosive stress wave towards the propagation path of basement rock (3), can effectively reduce explosion earthquake
Intensity, it is ensured that foundation ditch inner member and close to buildings are safe and stable.
Therefore, convenient, explosion and crushing effect is good, explosive specific charge is low and blasting vibration intensity is small with constructing for the utility model
The characteristics of.
Brief description of the drawings
Fig. 1 is a kind of schematic cross-section of the utility model；
Fig. 2 is the enlarged diagram of the A-A sections of Fig. 1.
Specific embodiment
The utility model will be further described with reference to the accompanying drawings and detailed description, not to its protection domain
Limitation.
Embodiment 1
A kind of pre-groove for deep foundation pit reinforced concrete support beam demolition blasting.
As shown in figure 1, excavating one in the basement rock 3 of the underface of deep foundation pit reinforced concrete support beam 1 of dismounting to be blasted
Bar demolition blasting pre-groove 2, the demolition blasting longitudinal centre line of pre-groove 2 and the depth of the dismounting to be blasted
The longitudinal centre line of foundation pit reinforced concrete support beam 1 is parallel, longitudinal centre line and institute of the demolition blasting with pre-groove 2
The longitudinal centre line for stating the deep foundation pit reinforced concrete support beam 1 of dismounting to be blasted is located on same vertical guide.
The longitudinal length of the deep foundation pit reinforced concrete support beam 1 of dismounting to be blasted described in the present embodiment isL,L=15m；
The width of cross section × a height of a × b, a × b=0.8 × 1.0m.
As shown in Fig. 2 the cross section of the demolition blasting pre-groove 2 is inverted trapezoidal, wherein：
The top width of inverted trapezoidal isa 1
a
1=a +Δa 1（1）
The bottom width of inverted trapezoidal isa 2
a
2=a +Δa 2（2）
Inverted trapezoidal it is a height ofb 1
b
1=Δb（3）
The length of the demolition blasting pre-groove 2 isL 1
L
1=L +ΔL（4）
In formula (1), formula (2), formula (3) and formula (4)：
LThe longitudinal length of the deep foundation pit reinforced concrete support beam 1 of dismounting to be blasted is represented, the present embodimentL=15m；
aThe cross-sectional width of the deep foundation pit reinforced concrete support beam 1 of dismounting to be blasted is represented, the present embodimenta =
0.8m；
ΔLRepresent that explosion is disassembled and used the length accentuation of pre-groove, the Δ of the present embodimentL=0.1m；
Δa 1Represent that explosion is disassembled and used the top width accentuation in pre-groove inverted trapezoidal section, the Δ of the present embodimenta 1=0.2m；
Δa 2Represent that explosion is disassembled and used the bottom width accentuation in pre-groove inverted trapezoidal section, the Δ of the present embodimenta 2=0.1m；
ΔbRepresent that explosion is disassembled and used the height in pre-groove inverted trapezoidal section, the Δ of the present embodimentb =0.15m。
Then：
The demolition blasting inverted trapezoidal section top width of pre-groove 2a 1=a +Δa 1=0.8+0.2=1.0；
The demolition blasting bottom width in the inverted trapezoidal section of pre-groove 2a 2=a +Δa 2=0.8+0.1=0.9m；
The demolition blasting height in the inverted trapezoidal section of pre-groove 2b 1=Δb=0.15m；
The demolition blasting length of pre-groove 2L 1=L +ΔL =15+0.1=15.1m。
Embodiment 2
A kind of pre-groove for deep foundation pit reinforced concrete support beam demolition blasting.
As shown in figure 1, excavating one in the basement rock 3 of the underface of deep foundation pit reinforced concrete support beam 1 of dismounting to be blasted
Bar demolition blasting pre-groove 2, the demolition blasting longitudinal centre line of pre-groove 2 and the depth of the dismounting to be blasted
The longitudinal centre line of foundation pit reinforced concrete support beam 1 is parallel, longitudinal centre line and institute of the demolition blasting with pre-groove 2
The longitudinal centre line for stating the deep foundation pit reinforced concrete support beam 1 of dismounting to be blasted is located on same vertical guide.
The longitudinal length of the deep foundation pit reinforced concrete support beam 1 of dismounting to be blasted described in the present embodiment isL,L=20m；
The width of cross section × a height of a × b, a × b=1.0 × 1.2m.
As shown in Fig. 2 the cross section of the demolition blasting pre-groove 2 is inverted trapezoidal, wherein：
The top width of inverted trapezoidal isa 1
a
1=a +Δa 1（1）
The bottom width of inverted trapezoidal isa 2
a
2=a +Δa 2（2）
Inverted trapezoidal it is a height ofb 1
b
1=Δb（3）
The length of the demolition blasting pre-groove 2 isL 1
L
1=L +ΔL（4）
In formula (1), formula (2), formula (3) and formula (4)：
LThe longitudinal length of the deep foundation pit reinforced concrete support beam 1 of dismounting to be blasted is represented, the present embodimentL=20m；
aThe cross-sectional width of the deep foundation pit reinforced concrete support beam 1 of dismounting to be blasted is represented, the present embodimenta =
1.0m；
ΔLRepresent that explosion is disassembled and used the length accentuation of pre-groove, the Δ of the present embodimentL=0.3m；
Δa 1Represent that explosion is disassembled and used the top width accentuation in pre-groove inverted trapezoidal section, the Δ of the present embodimenta 1=0.4m；
Δa 2Represent that explosion is disassembled and used the bottom width accentuation in pre-groove inverted trapezoidal section, the Δ of the present embodimenta 2=0.2m；
ΔbRepresent that explosion is disassembled and used the height in pre-groove inverted trapezoidal section, the Δ of the present embodimentb =0.25m。
Then：
The demolition blasting inverted trapezoidal section top width of pre-groove 2a 1=a +Δa 1=1.0+0.4=1.4；
The demolition blasting inverted trapezoidal section bottom width of pre-groove 2a 2=a +Δa 2=1.0+0.2=1.2m；
The demolition blasting inverted trapezoidal depth of section of pre-groove 2b 1=Δb=0.25m；
The demolition blasting length of pre-groove 2L 1=L +ΔL =20+0.3=20.3m。
Embodiment 3
A kind of pre-groove for deep foundation pit reinforced concrete support beam demolition blasting.
As shown in figure 1, excavating one in the basement rock 3 of the underface of deep foundation pit reinforced concrete support beam 1 of dismounting to be blasted
Bar demolition blasting pre-groove 2, the demolition blasting longitudinal centre line of pre-groove 2 and the depth of the dismounting to be blasted
The longitudinal centre line of foundation pit reinforced concrete support beam 1 is parallel, longitudinal centre line and institute of the demolition blasting with pre-groove 2
The longitudinal centre line for stating the deep foundation pit reinforced concrete support beam 1 of dismounting to be blasted is located on same vertical guide.
The longitudinal length of the deep foundation pit reinforced concrete support beam 1 of dismounting to be blasted described in the present embodiment isL,L=16m；
The width of cross section × a height of a × b, a × b=1.4 × 1.4m.
As shown in Fig. 2 the cross section of the demolition blasting pre-groove 2 is inverted trapezoidal, wherein：
The top width of inverted trapezoidal isa 1
a
1=a +Δa 1（1）
The bottom width of inverted trapezoidal isa 2
a
2=a +Δa 2（2）
Inverted trapezoidal it is a height ofb 1
b
1=Δb（3）
The length of the demolition blasting pre-groove 2 isL 1
L
1=L +ΔL（4）
In formula (1), formula (2), formula (3) and formula (4)：
LThe longitudinal length of the deep foundation pit reinforced concrete support beam 1 of dismounting to be blasted is represented, the present embodimentL=16m；
aThe cross-sectional width of the deep foundation pit reinforced concrete support beam 1 of dismounting to be blasted is represented, the present embodimenta =
1.4m；
ΔLRepresent that explosion is disassembled and used the length accentuation of pre-groove, the Δ of the present embodimentL=0.5m；
Δa 1Represent that explosion is disassembled and used the top width accentuation in pre-groove inverted trapezoidal section, the Δ of the present embodimenta 1=0.7m；
Δa 2Represent that explosion is disassembled and used the bottom width accentuation in pre-groove inverted trapezoidal section, the Δ of the present embodimenta 2=0.4m；
ΔbRepresent that explosion is disassembled and used the height in pre-groove inverted trapezoidal section, the Δ of the present embodimentb =0.35m。
Then：
The demolition blasting inverted trapezoidal section top width of pre-groove 2a 1=a +Δa 1=1.4+0.7=2.1
The demolition blasting bottom width in the inverted trapezoidal section of pre-groove 2a 2=a +Δa 2=1.4+0.4=1.8m；
The demolition blasting height in the inverted trapezoidal section of pre-groove 2b 1=Δb=0.35m；
The demolition blasting length of pre-groove 2L 1=L +ΔL =16+0.5=16.5m。
This specific embodiment has following good effect compared with prior art：
This specific embodiment before the demolition blasting of deep foundation pit reinforced concrete support beam 1, according to the depth of dismounting to be blasted
The size of foundation pit reinforced concrete support beam 1, in advance in the underface of deep foundation pit reinforced concrete support beam 1 of dismounting to be blasted
Take a demolition blasting pre-groove 2 in basement rock 3, so as to be the deep foundation pit reinforced concrete support beam 1 of dismounting to be blasted
Underface be created that free face, reduce basement rock 3 treat demolition blasting deep foundation pit reinforced concrete support beam 1 clipping make
With beneficial to the demolition blasting effect of the deep foundation pit reinforced concrete support beam 1 for improving dismounting to be blasted；Can reduce explosive specific charge and
Blasthole number, while reducing explosive cost, shortens the demolition blasting duration.
Demolition blasting pre-groove 2 can take basement rock (3) and complete pretreatment work by machinery, simple to operate, construction
It is convenient；Demolition blasting pre-groove 2 can cut off Explosive stress wave towards the propagation path of basement rock (3), can effectively reduce explosion
Earthquake intensity, it is ensured that foundation ditch inner member and close to buildings are safe and stable.
Therefore, convenient, explosion and crushing effect is good, explosive specific charge is low and blasting vibration is strong with constructing for this specific embodiment
The characteristics of spending small.
Claims (1)
1. a kind of pre-groove for deep foundation pit reinforced concrete support beam demolition blasting, it is characterised in that：Torn open to be blasted
The deep foundation pit reinforced concrete support beam removed（1）The basement rock of underface（3）One demolition blasting pre-groove of middle excavation（2）,
The demolition blasting pre-groove（2）Longitudinal centre line and the dismounting to be blasted deep foundation pit reinforced concrete support beam
（1）Longitudinal centre line it is parallel, the demolition blasting pre-groove（2）Longitudinal centre line and the dismounting to be blasted depth
Foundation pit reinforced concrete support beam（1）Longitudinal centre line be located at same vertical guide on；
The deep foundation pit reinforced concrete support beam of the dismounting to be blasted（1）Longitudinal length be L, width × a height of a × b of cross section；
The demolition blasting pre-groove（2）Cross section be inverted trapezoidal, wherein：
The top width of inverted trapezoidal isa 1
a1=a+Δa1（1）
The bottom width of inverted trapezoidal isa 2
a2=a+Δa2（2）
Inverted trapezoidal it is a height ofb 1
b
1=Δb（3）
The demolition blasting pre-groove（2）Length beL 1
L
1=L+ΔL（4）
In formula (1), formula (2), formula (3) and formula (4)：
LRepresent the deep foundation pit reinforced concrete support beam of dismounting to be blasted（1）Longitudinal length, m；
aRepresent the deep foundation pit reinforced concrete support beam of dismounting to be blasted（1）Cross-sectional width, m；
bRepresent the deep foundation pit reinforced concrete support beam of dismounting to be blasted（1）Cross-sectional height, m；
ΔLRepresent that explosion is disassembled and used the length accentuation of pre-groove, ΔL=0.1~0.5m；
Δa 1Represent that explosion is disassembled and used the top width accentuation in pre-groove inverted trapezoidal section, Δa 1=0.2~0.7m；
Δa 2Represent that explosion is disassembled and used the bottom width accentuation in pre-groove inverted trapezoidal section, Δa 2=0.1~0.4m；
ΔbRepresent that explosion is disassembled and used the height in pre-groove inverted trapezoidal section, Δb=0.15~0.35m.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621385956.9U CN206279537U (en) | 2016-12-16 | 2016-12-16 | For the pre-groove of deep foundation pit reinforced concrete support beam demolition blasting |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621385956.9U CN206279537U (en) | 2016-12-16 | 2016-12-16 | For the pre-groove of deep foundation pit reinforced concrete support beam demolition blasting |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206279537U true CN206279537U (en) | 2017-06-27 |
Family
ID=59072483
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621385956.9U Withdrawn - After Issue CN206279537U (en) | 2016-12-16 | 2016-12-16 | For the pre-groove of deep foundation pit reinforced concrete support beam demolition blasting |
Country Status (1)
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| CN (1) | CN206279537U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106592602A (en) * | 2016-12-16 | 2017-04-26 | 武汉科技大学 | Prefabricated groove for deep foundation pit reinforced concrete support beam to be subjected to blasting demolition |
-
2016
- 2016-12-16 CN CN201621385956.9U patent/CN206279537U/en not_active Withdrawn - After Issue
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106592602A (en) * | 2016-12-16 | 2017-04-26 | 武汉科技大学 | Prefabricated groove for deep foundation pit reinforced concrete support beam to be subjected to blasting demolition |
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| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20170627 Effective date of abandoning: 20180703 |