CN105155478A - Novel barrier dam reinforcing utilization method - Google Patents

Abstract

The invention discloses a novel barrier dam reinforcing utilization method. The novel barrier dam reinforcing utilization method comprises following steps that siphons are arranged on the top surface of a barrier dam, the diameter of each siphon is in a range from 10cm to 30cm; the siphons absorb water and generate a siphonic effect; the top surface of the barrier dam is tamped and leveled by a vibrating rammer; drill holes are arranged in the top surface of the barrier dam along the longitudinal axis; grouting pipes are arranged in the drill holes; a high-pressure grouting pump is used for pouring consolidating materials into the drill holes; prefabricated reinforced concrete open tubes are buried in two end portions of the barrier dam; concrete is poured on the top surface of the barrier dam; the downstream face slope angle is ballasted; the upstream face and the downstream face of the barrier dam are repaired to form slope protection; drainage trenches are excavated; and the siphons are removed, and the dam body is formed. The novel barrier dam reinforcing utilization method is simple in process, and good in implementation effect, and is economical and efficient, and has a wide application prospect, and materials are saved.

Description

A kind of novel damming dam reinforces Application way

Technical field

The invention belongs to hydraulic engineering technical field, particularly one novel damming dam strengthening Application way.

Background technology

Western China is mountain area, topographic and geologic complicated condition, ravines and guillies criss-cross, and rainfall enriches, and the region that western China is seismic activity to take place frequently.In seismic process, usually can with heavy rain, massif easily causes landslide.Landslide easily forms barrier lake, such as, the Wenchuan earthquake of 2008, defines 34 place's barrier lakes altogether, wherein Tangjiashan barrier lake is maximum, the most dangerous barrier lake formed in earthquake, its Peak sink is 3.2 billion cubic meters, and peak level is 743.1 meters, and upstream and downstream peak level difference reaches 79 meters, the situation is desperate at that time, once the collapse of damming body, will big flood be caused, cause flooding of Beichuan county town, downstream.Final People's Armed Police is by the help of heavy-duty machinery, adopt heavy-duty machinery excavation and explosion combine technology mining overflow big vast groove dismounting damming dam, consume a large amount of human and material resources and financial resources, for the armed police troops participating in removing damming body, there is very large danger simultaneously, and the utilization of blasting technique, the stable of damming dam self is also had a great impact.

On the other hand, because China's hydraulic power potentials deposit enriches, although a lot of Hydraulic and Hydro-Power Engineerings has been built in western China, the utilization rate of hydraulic power potentials is still very low.Checkdam common in current engineering much all adopts earth and rockfill dam type, and the construction of earth and rockfill dam needs a large amount of natural materialss.How being used on existing damming dam, making it to become the available dam of engineering, possess the ability of retaining, generating, is the problem needing to solve.

Summary of the invention

The object of the invention is to, overcome existing process damming dam method, need labor intensive, material resources, financial resources, and the dangerous defect of tool, and when building earth and rockfill dam, need to excavate a large amount of natural materialss, invent a kind of novel damming dam strengthening Application way, turned waste into wealth in damming dam and utilized.

A kind of novel damming dam strengthening Application way, comprises the following steps:

(1) be the syphon of 10cm ~ 30cm in damming dam crest face placement diameter, the spacing between syphon is 2 ~ 5m;

(2) syphon water suction, makes upper water be discharged to downstream along syphon, produces siphonic effect;

(3) dam crest face megalith is moved to downstream Ba Jiao, form slope angle ballast, then with vibrating rammer, compacting leveling is carried out to damming dam crest face;

(4) in damming dam crest face along longitudinal axis drill hole of drilling machine, and go deep into bottom damming dam, the spacing between boring is 0.8 ~ 1.5m, and is blossom type distribution in dam crest face;

(5) under, Grouting Pipe is to foot of hole, lays high-pressure injection pump in dam crest face, is communicated with Grouting Pipe and high-pressure injection pump;

(6) in boring, pour into cementing material with high-pressure injection pump, Grouting Pipe is pulled out on limit to marginal not slurry, until fill up boring, in slip casting process, cementing material penetrates in surrounding soil, and the soil body is solidified, and plays antiseepage effect;

(7) syphon continues to discharge water, and makes upper pond level distance dam crest face more than 5m;

(8) within the scope of damming dam two ends 5 ~ 10m, the groove that 3 ~ 5m is high is excavated;

(9) install the prefabricated reinforced concrete hollow section that diameter is 1 ~ 2m, top is backfill again, and compacting;

(10) ordinary concrete of C10 ~ C30 is built in damming dam crest face, and thickness is 30cm ~ 50cm;

(11) unnecessary earth and stone material is stacked into downstream slope angle and carries out ballast;

(12) upstream face and downstream face carry out repairing to form dam slope;

(13) in the front of dam body downstream face prefabricated reinforced concrete hollow section, excavate width and be equal to prefabricated reinforced concrete pipe diameter, the degree of depth is the gutter of 0.5m ~ 1m;

(14) build the ordinary concrete of C10 at gutter inner surface, thickness is 10cm ~ 20cm, forms bank protection at downstream face stone block building;

(15) remove syphon, erection & lift is at the watertight shutter of prefabricated reinforced concrete hollow section water inlet;

(16) finally dam body is formed.

The present invention is compared with existing barrier lake administering method, and its advantage is:

(1) difficult problem that remote mountain areas big machinery cannot be marched into the arena is overcome, and the difficult problem that after overcoming disaster, main equipment cannot be carried.Because syphon is easily carried, after there is disaster, at damming dam upper surface, syphon can be installed immediately, utilize siphon principle to discharge upper water, the height of upper pond level can be controlled, maintain the stable of damming body self, eliminate the threat to downstream;

(2) good economy performance.Compared with the checkdam of routine, do not need the natural soil stone material that a large amount of excavation is a large amount of, only need to build a small amount of cementing material and concrete;

(3) safety is high.Because damming dam is the accumulation body that massif HIGH-SPEED LANDSLIDE is formed, the soil body has higher density through high speed impact, can keep stable behind landslide, illustrate that it has certain safety factor, by build cementing material in damming dam after, improve the stability of dam body, enhance impermeable ability;

(4) little to downstream influences.The water that syphon is derived and the water that gutter is discharged are all slowly flow to downstream, on downstream without impact, overcome blast working dam bursting flood and jeopardize downstream security;

(5) syphon can be recycled;

(6) social value is large.The method of current process barrier lake is all need consumption of natural resource, social value can not be created simultaneously, and damming body is become the administering method on damming dam, only need to consume a small amount of resource, both huge social value can be created, natural disaster is become a kind of present, realizes the target that the mankind and natural harmony are got along.

Accompanying drawing explanation

Fig. 1---drawing in side sectional elevation after damming dam installation syphon

Fig. 2---damming dam borehole pattern

Fig. 3---dam body boring cross-sectional drawing

Cross-sectional drawing after cementing material is built on Fig. 4---damming dam

Fig. 5---final damming dam drawing in side sectional elevation

Fig. 6---damming dam graphics

In figure: 1 upper pond level, 2 filter screens, 3 damming dams, 4 syphons, 5 levels of tail water, 6 borings, 7 high-pressure injection pumps, 8 cementing materials, 9 ordinary concretes, 10 blocks of stones, 11 slope angle ballasts, 12 prefabricated reinforced concrete hollow sections, 13 gutters.

Detailed description of the invention

Below in conjunction with drawings and Examples, the invention will be further described, but should not be construed the above-mentioned subject area of the present invention and be only limitted to following embodiment.Without departing from the idea case in the present invention described above, according to ordinary skill knowledge and customary means, make various replacement and change, all should be included in protection scope of the present invention.

The method that this enforcement is disposed carrys out specific implementation (with reference to figure 1 ~ Fig. 6) by following steps:

(1) in damming dam 3 end face placement diameter be the syphon 4 of 10cm ~ 30cm, syphon 4 one end is positioned at upper pond level less than 1, with upper pond level 1 at a distance of 3 ~ 5m, the other end is in the level of tail water more than 5, with the level of tail water 5 at a distance of 1 ~ 3m, syphon 4 water inlet band filter screen 2, the spacing between syphon 4 is 2m ~ 5m, as shown in Figure 1;

(2) syphon 4 absorbs water, and makes upper water be discharged to downstream along syphon, produces siphonic effect;

(3) dam crest face megalith is moved to downstream Ba Jiao, form slope angle ballast 11, then with vibrating rammer, compacting leveling is carried out to damming dam 3 end face;

(4) at damming dam 3 end face along longitudinal axis drill hole of drilling machine, and go deep into bottom damming dam 3, the spacing between boring 6 is 0.8m ~ 1.5m, and be that blossom type distributes in dam crest face, as shown in Figure 2;

(5) under bottom Grouting Pipe to boring 6, lay high-pressure injection pump 7 in dam crest face, be communicated with Grouting Pipe and high-pressure injection pump 7, as shown in Figure 3;

(6) in boring 6, pour into cementing material 8 with high-pressure injection pump 7, cementing material 8 can be the material such as cement paste or high polymer.Grouting Pipe is pulled out on limit to marginal not slurry, and within the scope of distance damming dam 3 two ends 5 ~ 10m, when slip casting is to distance dam crest face 3 ~ 5m, stop slip casting, in all the other position slip castings until fill up boring 6, in slip casting process, cementing material 8 penetrates in surrounding soil, and the soil body is solidified.Play antiseepage effect, shown in institute Fig. 4;

(7) syphon 4 continues draining, makes upper pond level 1 apart from dam crest face more than 5m;

(8) within the scope of damming dam 3 two ends 3 ~ 5m, the groove that 3 ~ 5m is high is excavated;

(9) install the prefabricated reinforced concrete hollow section 12 that diameter is 1 ~ 2m, hollow section 12 wall thickness is 100 ~ 200mm, and top is backfill again, and compacting;

(10) damming dam 3 end face builds the ordinary concrete 9 of C10 ~ C30, and thickness is 30cm ~ 50cm;

(11) unnecessary earth and stone material is stacked into downstream slope angle and carries out ballast 11;

(12) upstream face and downstream face carry out repairing to form dam slope;

(13) below prefabricated reinforced concrete hollow section 12, excavate width and be equal to prefabricated reinforced concrete pipe diameter, the degree of depth is the gutter 13 of 0.5 ~ 1m;

(14) build the ordinary concrete 9 of C10 at gutter inner surface, thickness is 10cm ~ 20cm, builds formation bank protection by laying bricks or stones, as shown in Figure 5 at downstream face block stone 10;

(15) remove syphon 4, erection & lift is at the watertight shutter of prefabricated reinforced concrete hollow section 12 water inlet;

(16) final formation dam body 3, as shown in Figure 6.

Claims (2)

1. novel damming dam reinforces an Application way, and it is characterized in that, damming dam method of disposal is realized by following steps:

(1) be the syphon of 10cm ~ 30cm in damming dam crest face placement diameter, the spacing between syphon is 2m ~ 5m;

(2) syphon is absorbed water by siphonic effect, makes upper water be discharged to downstream along syphon;

(3) with vibrating rammer, compacting leveling is carried out to damming dam crest face;

(4) bore several holes in damming dam crest face along dam axis rig, each hole depth reaches original riverbed, and the spacing between boring is 0.8m ~ 1.5m;

(5) under, Grouting Pipe is to foot of hole, lays high-pressure injection pump in dam crest face, is communicated with Grouting Pipe and high-pressure injection pump;

(6) in boring, pour into cementing material with high-pressure injection pump, Grouting Pipe is pulled out on limit to marginal not slurry, until fill up boring, in slip casting process, cementing material penetrates in surrounding soil, and the soil body is solidified, and forms impervious body;

(7) syphon continues to discharge water, and makes upper pond level distance dam crest face more than 5m;

(8) within the scope of distance damming dam two sides 5 ~ 10m, excavate the dark groove of 3 ~ 5m at dam crest, the depth direction of groove is deep into dam body inside;

(9) install the prefabricated reinforced concrete hollow section that diameter is 1m ~ 2m, concrete pipe embeds among the groove of step (8), and top is backfill again, and compacting;

(10) ordinary concrete of C10 ~ C30 is built in damming dam crest face, and thickness is 30cm ~ 50cm;

(11) the unnecessary earth and stone material that step (3) and step (8) produce is stacked into downstream slope angle and carries out ballast;

(12) upstream face and downstream face carry out repairing to form dam slope;

(13) in the below of the dam body downstream face prefabricated reinforced concrete hollow section mouth of pipe, excavate width and be equal to prefabricated reinforced concrete pipe diameter, the degree of depth is the gutter of 0.5m ~ 1m;

(14) build the ordinary concrete of C10 at gutter inner surface, thickness is 10cm ~ 20cm, forms bank protection at downstream face stone block building;

(15) remove syphon, erection & lift is at the watertight shutter of prefabricated reinforced concrete hollow section water inlet;

(16) dam body is formed.

2. method according to claim 1, is characterized in that: step 3) in, during compacting leveling, dam crest face megalith is moved to downstream Ba Jiao.