CN103243723A - Retaining and protecting method for deep foundation pits - Google Patents
Retaining and protecting method for deep foundation pits Download PDFInfo
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- CN103243723A CN103243723A CN2013101601059A CN201310160105A CN103243723A CN 103243723 A CN103243723 A CN 103243723A CN 2013101601059 A CN2013101601059 A CN 2013101601059A CN 201310160105 A CN201310160105 A CN 201310160105A CN 103243723 A CN103243723 A CN 103243723A
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- round steel
- retaining
- rods
- cushion block
- steel rods
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Abstract
The invention discloses a retaining and protecting method for deep foundation pits. The retaining and protecting method includes: 1),forming holes for row piles; 2), putting round steel rods into the holes to serve as the row piles, where in rectangular grooves are arranged on the lateral portions of the round steel rods and square timber bars are embedded in the rectangular grooves between adjacent round steel rods; 3), forming holes for anchor rods, and putting rebars or steel strands into the holes to serve as first anchor rods; 4), grouting cement, arranging cushion blocks matched with the shapes of the round steel rods outside the round steel rods after the cement is solidified to designed strength, arranging transverse beams on the outer sides of the cushion blocks to enable the rebars or the steel strands to penetrate through the cushion blocks and the transverse beams, and then applying prestress; 5), digging foundation pits to the position 500mm below second anchoring rods and then repeating the above steps; 6), continue to dig until designed depth is reached; and 7), backfilling the foundation pits, and dismounting the round steel rods, the transverse beams and the rectangular timber bars in the retaining and protecting structure in a reversely sequence of the above steps. With the retaining and protecting method, the rectangular timber bars, the round steel rods and the cushion blocks can be dismounted to be reused after the retaining and protecting construction is finished, so that materials are saved.
Description
Technical field
The present invention relates to a kind of deep pit support maintaining method, especially a kind of reusable, deep pit support maintaining method of saving material.
Background technology
Present foundation pit supporting method is directly to squeeze into slope protection pile (deposited reinforced concrete pile) then along with the excavation of foundation pit certain intervals arranges girder steel at the edge before the excavation of foundation pit.Its campshed and girder steel all can't reuse behind pit backfill, cause waste.
Summary of the invention
The technical problem to be solved in the present invention provides the deep pit support maintaining method that a kind of part material can be saved construction material.
For solving the problems of the technologies described above, the technical solution used in the present invention is: a kind of deep pit support maintaining method, and it may further comprise the steps: 1) campshed pore-forming, diameter 400mm～500mm;
2) put into round steel as campshed in the hole, described round steel sidepiece is provided with rectangular recess, is embedded with lumps of wood bar in the rectangular recess of adjacent two round steel;
3) anchor pole pore-forming, diameter 100mm～150mm puts into reinforcing bar or steel strand as the first road anchor pole in the hole;
4) cement grouting after waiting to be solidified to design strength, at the cushion block of the outside installation of round steel with its form fit, and at cushion block arranged outside crossbeam, makes reinforcing bar or steel strand pass cushion block and crossbeam, applies prestressing force then;
5) excavation pit 500mm under the anchor pole position, second road repeats above-mentioned steps and carries out supporting;
6) continue excavation, and repeat above-mentioned construction sequence, until reaching projected depth;
7) pit backfill is by round steel, crossbeam and the lumps of wood bar (or channel-section steel) in the opposite sequence dismounting supporting and protection structure of above-mentioned steps, recycling.
Described cushion block is provided with the deep-slotted chip breaker that is complementary with the round steel cylindrical.
The beneficial effect that adopts technique scheme to produce is: the present invention is provided with groove as the round steel of campshed, be embedded with many lumps of wood bars in the groove and form supporting, the reinforcing bar or the steel strand that arrange pass cushion block and the after-applied prestressing force of crossbeam, after supporting construction is finished, lumps of wood bar (or channel-section steel), round steel and cushion block can disassemble repeated use, thereby have saved material; Supporting and protection structure of the present invention is reasonable, and support system is stable, can improve working security.
Description of drawings
Fig. 1 is the structural representation of job practices of the present invention;
Fig. 2 is the schematic diagram of round steel of the present invention;
Fig. 3 is the schematic diagram of cushion block of the present invention;
Wherein, 1, round steel; 2, the soil body; 3, crossbeam; 4, anchor pole; 5, groove; 6, cushion block; 7, deep-slotted chip breaker.
The specific embodiment
The present invention is further detailed explanation below in conjunction with the drawings and specific embodiments.
Referring to accompanying drawing 1-accompanying drawing 3, construction sequence of the present invention is as follows:
1) campshed pore-forming, diameter 400mm～500mm;
2) put into round steel 1 as campshed in the hole, round steel 1 sidepiece is provided with rectangular recess 5, is embedded with a plurality of lumps of wood bars in the rectangular recess 5 of adjacent two round steel 1, and this lumps of wood bar plays protective action;
3) beat bolthole then, diameter 100mm～150mm;
4) put into reinforcing bar or steel strand in above-mentioned bolthole, this reinforcing bar or steel strand are as anchor pole 4;
5) cement grouting at twice after waiting to reach design strength, is installed cushion block 6, cushion block 6 arranged outside crossbeams 3, and apply prestressing force; Referring to accompanying drawing 3, described cushion block 6 is provided with the deep-slotted chip breaker 7 with round steel 1 cylindrical form fit;
6) excavation pit about 500mm (designing according to actual needs), repeats above-mentioned steps and carries out supporting under the anchor pole position, second road;
7) continue excavation and repetition said process, until reaching projected depth;
8) pit backfill, the opposite sequence of pressing said sequence is removed round steel, crossbeam and lumps of wood bar or the channel-section steel in the support system, recycling.
The present invention is provided with the round steel 1 that can reuse at the supporting wall of foundation ditch, be provided with many lumps of wood bars on round steel campshed plane, anchor pole 4 is rearward extended in the soil body 2 by round steel 1 side direction, link to each other with round steel 1 by cushion block 6, crossbeam 3 at anchor pole 4 front ends, and apply prestressing force, repeat said process by designing requirement and get final product, treat pit backfill layering simultaneously dismounting, recycling.
The present invention adopts round steel to add the anchor structure system generally, and special round steel 1 is put into as campshed in boring back in the hole, beat bolthole again, puts into reinforcing bar or steel strand, cement grouting, treat that intensity meets the demands after, add special cushion block 6, crossbeam 3, apply prestressing force.Excavation pit adds lumps of wood bar or channel-section steel between two round steel 1 while excavating, make a call to second row's bolthole after the arrival design at interval again, put into reinforcing bar or steel strand, cement groutings etc. repeat above process and reach projected depth, form the support system of many horizontal rows beam 3 and anchor pole.Along with pit backfill, cushion block 6, crossbeam 3, round steel 1 are dismantled from bottom to top, can repeat repeatedly to use.
There is advantage significantly foundation ditch safety of the present invention, stability, workmanship, work progress, economy, environmental benefit and social benefit aspect, are a kind of foundation pit supporting methods of novel environment friendly.
Claims (2)
1. deep pit support maintaining method is characterized in that: may further comprise the steps:
1) campshed pore-forming, diameter 400mm～500mm;
2) put into round steel (1) as campshed in the hole, described round steel (1) sidepiece is provided with rectangular recess (5), is embedded with some blocks of lumps of wood bar or the channel-section steels that are used for protection in the rectangular recess (5) of adjacent two round steel (1);
3) anchor pole pore-forming, diameter 100mm～150mm puts into reinforcing bar or steel strand as the first road anchor pole (4) in the hole, and reinforcing bar or steel strand are obliquely installed in the soil body (2) in the rear;
4) cement grouting, after waiting to be solidified to design strength, at the cushion block (6) of the outside installation of round steel with its form fit, and at cushion block 6) arranged outside crossbeam (3), make reinforcing bar or steel strand pass cushion block and crossbeam, apply prestressing force then;
5) excavation pit 500mm under the anchor pole position, second road repeats above-mentioned steps and carries out supporting;
6) continue excavation, and repeat above-mentioned construction sequence, until reaching projected depth;
7) pit backfill is by round steel (1), crossbeam (3) and the lumps of wood bar in the opposite sequence dismounting supporting and protection structure of above-mentioned steps, recycling.
2. according to the described a kind of deep pit support maintaining method of claim 1, it is characterized in that: described cushion block (6) is provided with the deep-slotted chip breaker (7) that is complementary with the round steel cylindrical.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013101601059A CN103243723A (en) | 2013-05-03 | 2013-05-03 | Retaining and protecting method for deep foundation pits |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013101601059A CN103243723A (en) | 2013-05-03 | 2013-05-03 | Retaining and protecting method for deep foundation pits |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103243723A true CN103243723A (en) | 2013-08-14 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2013101601059A Pending CN103243723A (en) | 2013-05-03 | 2013-05-03 | Retaining and protecting method for deep foundation pits |
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| CN (1) | CN103243723A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104264683A (en) * | 2014-09-16 | 2015-01-07 | 泛华建设集团有限公司 | Concave ultra-deep foundation pit zoned supporting method for three-side surrounded cultural protection building |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1204714A (en) * | 1997-07-04 | 1999-01-13 | 李宪奎 | Method for forming retaining wall |
| CN201125387Y (en) * | 2007-11-22 | 2008-10-01 | 赵慧丽 | Middle beam pad iron assembly in anchor rod construction |
| CN201826869U (en) * | 2010-10-16 | 2011-05-11 | 山东科技大学 | Soft rock roadway anchored steel pipe concrete anti-floor heave device |
| KR20110129657A (en) * | 2010-05-26 | 2011-12-02 | 이득근 | Retaining wall using frame structure and method of making retaining wall using thereof |
-
2013
- 2013-05-03 CN CN2013101601059A patent/CN103243723A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1204714A (en) * | 1997-07-04 | 1999-01-13 | 李宪奎 | Method for forming retaining wall |
| CN201125387Y (en) * | 2007-11-22 | 2008-10-01 | 赵慧丽 | Middle beam pad iron assembly in anchor rod construction |
| KR20110129657A (en) * | 2010-05-26 | 2011-12-02 | 이득근 | Retaining wall using frame structure and method of making retaining wall using thereof |
| CN201826869U (en) * | 2010-10-16 | 2011-05-11 | 山东科技大学 | Soft rock roadway anchored steel pipe concrete anti-floor heave device |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104264683A (en) * | 2014-09-16 | 2015-01-07 | 泛华建设集团有限公司 | Concave ultra-deep foundation pit zoned supporting method for three-side surrounded cultural protection building |
| CN104264683B (en) * | 2014-09-16 | 2015-11-18 | 泛华建设集团有限公司 | Building concave shape ultra-deep foundation pit subregion supporting method is protected for three around literary composition |
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Application publication date: 20130814 |