CN105040724A - Treatment method for poor concrete dam joint foundations - Google Patents
Treatment method for poor concrete dam joint foundations Download PDFInfo
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- CN105040724A CN105040724A CN201510393700.6A CN201510393700A CN105040724A CN 105040724 A CN105040724 A CN 105040724A CN 201510393700 A CN201510393700 A CN 201510393700A CN 105040724 A CN105040724 A CN 105040724A
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Abstract
The invention relates to a treatment method for poor concrete dam joint foundations. The treatment method for the poor concrete dam joint foundations does not affect operation of railways or highways and meets the requirements of water-power engineering junction layouts. The treatment method aims at achieving the foundation strength and the seepage-proofing purpose of a concrete dam joint under poor geological conditions, guaranteeing operation safety of the highways in the flood season, reducing slope excavation, reducing waste slag fields, facilitating water and soil conservation and saving engineering investment. According to the technical scheme, the concrete dam joint is arranged on one side of a highway and comprises the concrete dam joint foundation I adjacent to the highway and the adjacent concrete dam joint foundation II; after the concrete dam joint foundation I is excavated, steep slopes are formed, plain concrete 20 cm in thickness needs to be sprayed to the steep slopes for slope fixation, it is found that a foundation weak intercalated layer is arranged below the concrete dam joint foundation I during construction with the attitude of rock slowly inclines to the downstream, and the inclination angle ranges from 20 degrees to 35 degrees. The treatment method is suitable for hydraulic and hydroelectric engineering.
Description
Technical field
The present invention relates to a kind of processing method of the bad basis of concrete dam joint, be applicable to Hydraulic and Hydro-Power Engineering.
Background technology
Hydroelectric project hinge requires higher to dam body foundation carrying and antiseepage, dam joint structure basis preferably can be located on basement rock, but run into bank and have sliding mass, artificial slag, rubble clay, when joint basis, dam has the complex foundation conditions such as weak interbed to be close to again railway or highway, side slope and dam joint foundation excavation are extremely restricted even cannot construct.Plain tract is built this problem of water conservancy and hydropower multi-purpose project very outstanding, flood season, the danger of temporary construction was just large especially, in order to ensure side slope not unstability, usually first rush construction and railway or highway adjacent concrete dam joint, to alleviate, dam joint foundation excavation difficulty is large, the construction period cuts off highway affects the difficulties such as traffic, but adjacent foundation can be brought not yet to excavate, the risk that geological conditions is not quite clear, thus affect dam foundation bearing capacity and anti-seepage effect.
Summary of the invention
The technical problem to be solved in the present invention is: for above-mentioned Problems existing, there is provided a kind of and neither affect the processing method that Rail Highway ran, met again the bad basis of concrete dam joint of hydroelectric project project playout, be intended to the underlying strength and the antiseepage problem that solve poor geology Under Concrete dam joint, ensure road travel safety in flood season, reduce slope excavation, reduce waste place, be conducive to water and soil conservation, cost saving.
The technical solution adopted in the present invention is: a kind of processing method of the bad basis of concrete dam joint, described concrete dam joint arrangement is in the side of highway, comprise No. I concrete dam joint basis of next-door neighbour's highway and No. II adjacent concrete dam joint basis, it is characterized in that the treatment step of this concrete dam joint is as follows:
A, carry out Gong Lu Cheongju slope and be close to the local excavation on No. I concrete dam joint basis of highway, the soil property formed afterwards at excavation is risen steeply in side slope and is sprayed the thick plain concrete of 20cm;
B, build No. I concrete dam joint basis, after concrete reaches and builds the length of time, carry out the excavation on No. II concrete dam joint basis, disclose the ground weak intercalated layer under No. I concrete dam joint basis, this interlayer occurrence slow tendency downstream, inclination angle is 20 ~ 35 °;
C, within the scope of No. I concrete dam joint basal perimeter, lay shot hole, draw the clay digging out ground weak intercalated layer after small pit goaf controlled blasting, and arrange trapezoidal sand drift outward in the laying scope of shot hole;
D, to drawing the ground weak intercalated layer back filled foundation concrete plug after digging process, build No. II concrete dam joint basis, curtain grouting in foundation of dam is carried out, until below basic relative water resisting layer in No. I concrete dam joint basis and No. II concrete dam joint basis.
The foundation plane width on described No. I concrete dam joint basis and No. II concrete dam joint basis is respectively 10-20m.
The invention has the beneficial effects as follows: when the present invention is to the construction and excavation process of concrete dam joint, neither affect Rail Highway and run, meet the requirement of hydroelectric project project playout again, and dam foundation treatment is simple; After disclosing unfavorable geological condition after adjacent dam body foundation excavation, by small pit goaf static blasting, draw and dig ground weak intercalated layer, fill concrete plugs and changes, foundation grout curtain, can be effectively addressed, meet dam joint basis carrying and antiseepage requirement, ensured road travel safety in flood season, decrease slope excavation, reduce waste place, be conducive to water and soil conservation, cost saving; The present invention is bad to solution next-door neighbour joint basis, highway dam, adjacent building basement rock utilizes the face discrepancy in elevation large, and flood season, Upon Slope Stability required high, and the construction period ensures that the benefit of the technical barriers such as the coast is clear requirement is obvious.
Accompanying drawing explanation
Fig. 1 is plan view of the present invention.
Fig. 2 is A-A view of the present invention.
Fig. 3 is B-B view of the present invention.
Fig. 4 is C-C view of the present invention.
Detailed description of the invention
The present embodiment is a kind of processing method of the bad basis of concrete dam joint, this concrete dam joint arrangement is in the side of highway 1, comprise No. I concrete dam joint basis 4 and adjacent No. II concrete dam joint basis 5 of next-door neighbour's highway 1, define side slope 2 of rising steeply after the excavation of No. I concrete dam joint basis 4,20cm thick plain concrete 3 Gu Po should be sprayed rising steeply in side slope 2.Construction midway finds that No. I concrete dam joint basis 4 has the ground weak intercalated layer 7 that attitude of rocks delays tendency downstream, inclination angle is 20 ~ 35 ° below, and therefore need continuing construction after this ground weak intercalated layer replacement Treatment again, concrete operation step is as follows:
1, as shown in Figure 1 and Figure 2, the local excavation on the Cheongju slope of first carrying out highway 1 and No. I concrete dam joint basis 4 being close to highway, the soil property formed afterwards at excavation is risen steeply and side slope 2 sprays the thick plain concrete of 20cm 3 is protected;
2, as shown in Figure 3, build No. I concrete dam joint basis 4, after concrete reaches and builds the length of time, carry out the excavation on No. II concrete dam joint basis 5, at this moment disclose No. I concrete dam joint basis 4 and have ground weak intercalated layer 7 below, the occurrence slow tendency downstream of this ground weak intercalated layer, inclination angle is 20 ~ 35 °;
3, as shown in Figure 4, shot hole (comprising pipe laying and explosive) 8 is laid in No. I concrete dam joint basis 4 periphery certain limits, adopt the method for small pit goaf controlled blasting to carry out explosion, the clay of explosion groundwork weak intercalated layer 7 is drawn and digs process; Can arrange outward trapezoidal sand drift 9 in the laying scope of shot hole 8 before explosion, after observation explosion, sand drift shape conversion situation, detection static blasting vibrating effect, namely detect explosion to the impact on built No. I concrete dam joint basis 4;
4, as shown in Figure 4, to drawing the ground weak intercalated layer 7 back filled foundation concrete plug 10 after digging process, build No. II concrete dam joint basis 5, curtain grouting in foundation of dam 6 is carried out, until joint basis, dam is positioned at below water barrier respectively on No. I concrete dam joint basis 4 and No. II concrete dam joint basis 5.
In the present embodiment, the foundation plane width on No. I concrete dam joint basis 4 and No. II concrete dam joint basis 5 is respectively 10m.
Claims (2)
1. the processing method on the bad basis of concrete dam joint, described concrete dam joint arrangement is in the side of highway (1), comprise No. I concrete dam joint basis (4) and adjacent No. II concrete dam joint basis (5) of next-door neighbour's highway (1), it is characterized in that the treatment step of this concrete dam joint is as follows:
A, carry out Gong Lu Cheongju slope and be close to the local excavation of No. I concrete dam joint basis (4) of highway, the soil property formed afterwards at excavation is risen steeply the thick plain concrete (3) of side slope (2) upper spray 20cm;
B, build No. I concrete dam joint basis (4), after concrete reaches and builds the length of time, carry out the excavation of No. II concrete dam joint basis (5), disclose the ground weak intercalated layer (7) under No. I concrete dam joint basis (4), this interlayer occurrence slow tendency downstream, inclination angle is 20 ~ 35 °;
C, laying shot hole (8) in No. I concrete dam joint basis (4) peripheral extent, draw the clay digging out ground weak intercalated layer (7) after small pit goaf controlled blasting, and arrange trapezoidal sand drift (9) outward in the laying scope of shot hole (8);
D, to drawing ground weak intercalated layer (7) the back filled foundation concrete plug (10) after digging process, build No. II concrete dam joint basis (5), No. I concrete dam joint basis (4) and No. II concrete dam joint basis (5) carry out curtain grouting in foundation of dam (6), until below basic relative water resisting layer.
2. the processing method on a kind of bad basis of concrete dam joint according to claim 1, is characterized in that: the foundation plane width of described No. I concrete dam joint basis (4) and No. II concrete dam joint basis (5) is respectively 10-20m.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510393700.6A CN105040724B (en) | 2015-07-02 | 2015-07-02 | A kind of bad basic processing method of concrete dam joint |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510393700.6A CN105040724B (en) | 2015-07-02 | 2015-07-02 | A kind of bad basic processing method of concrete dam joint |
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| CN105040724A true CN105040724A (en) | 2015-11-11 |
| CN105040724B CN105040724B (en) | 2017-03-01 |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20020068118A (en) * | 2001-02-20 | 2002-08-27 | (주)한석엔지니어링건축사사무소 | Protecting Structure of Concrete Caisson |
| CN200978430Y (en) * | 2006-12-07 | 2007-11-21 | 中国水电顾问集团华东勘测设计研究院 | Concrete dam joint structure |
| CN101603299A (en) * | 2009-07-02 | 2009-12-16 | 中国水电顾问集团华东勘测设计研究院 | A kind of broken line type dam joint structure and job practices thereof |
| CN201433386Y (en) * | 2009-07-02 | 2010-03-31 | 中国水电顾问集团华东勘测设计研究院 | Broken-line type dam joint structure |
| CN102619196A (en) * | 2012-04-18 | 2012-08-01 | 中国水电顾问集团中南勘测设计研究院 | Connector of concrete dam and earth dam in coastal wide river valley region |
-
2015
- 2015-07-02 CN CN201510393700.6A patent/CN105040724B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20020068118A (en) * | 2001-02-20 | 2002-08-27 | (주)한석엔지니어링건축사사무소 | Protecting Structure of Concrete Caisson |
| CN200978430Y (en) * | 2006-12-07 | 2007-11-21 | 中国水电顾问集团华东勘测设计研究院 | Concrete dam joint structure |
| CN101603299A (en) * | 2009-07-02 | 2009-12-16 | 中国水电顾问集团华东勘测设计研究院 | A kind of broken line type dam joint structure and job practices thereof |
| CN201433386Y (en) * | 2009-07-02 | 2010-03-31 | 中国水电顾问集团华东勘测设计研究院 | Broken-line type dam joint structure |
| CN102619196A (en) * | 2012-04-18 | 2012-08-01 | 中国水电顾问集团中南勘测设计研究院 | Connector of concrete dam and earth dam in coastal wide river valley region |
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| CN105040724B (en) | 2017-03-01 |
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