CN100585094C - Construction method of circular deep foundation pit support - Google Patents
Construction method of circular deep foundation pit support Download PDFInfo
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- CN100585094C CN100585094C CN200810120096A CN200810120096A CN100585094C CN 100585094 C CN100585094 C CN 100585094C CN 200810120096 A CN200810120096 A CN 200810120096A CN 200810120096 A CN200810120096 A CN 200810120096A CN 100585094 C CN100585094 C CN 100585094C
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Abstract
The invention provides a method for constructing the circular deep foundation support, comprising the following steps that: firstly, a circular pool wall I (6) is constructed by a segment topdown construction method, wherein, the first segment of the circular pool wall I constructed by the segment topdown construction method is taken as a supporting ring beam, after the digging depth is up to the needed degree, a lower cushion coat (9) and base plate (8) of the pool base plate are cast with concrete, and the pool wall II (7) of the remaining part is constructed by the regular construction method upwards from the base plate (8). Compared with the prior art, the method has the characteristics that the construction degree of advancement is rapid, the cost is low, the deformation is easy to control, the engineering quality is good, the foundation ditch has a high degree of safety, and the method is applicable to circular foundation ditches with any digging depths.
Description
The method field:
The invention belongs to the realm of building construction, particularly relate to a kind of job practices of circular deep foundation pit support.
Background method:
At present, the method to circular concrete basin deep foundation pit support has combined type soil nailing wall, cement mixing pile to form gravity retaining wall, fender post (tube-sinking cast-in-situ pile, bored pile, prestressed concrete pipe pile) in conjunction with horizontal support, column, ring beam.Adopt combined type soil nailing wall or cement mixing pile to form the method for gravity retaining wall, its construction speed slow (firm time is long), cost is higher, the difficult control of distortion promptly influences the degree of safety that workmanship influences foundation ditch again, so and because the bigger foundation ditch of the difficult control limited inapplicable cutting depth of bearing capacity of distortion; Adopt fender post in conjunction with horizontal support, column, ring beam, its support space enclosing structures such as ring beam and stand column pile the cost height, need layering that the support replacement band is set and after construction, need to remove to support, so construction speed is slow, raw materials consumption is big, cost is high.
Summary of the invention:
The present invention is directed to that above problem provides that a kind of construction speed is fast, cost is low, distortion is easy to control, good engineering quality, the foundation ditch degree of safety is high and the job practices of circular deep foundation pit support that the circular foundation ditch of any cutting depth all is suitable for.
The present invention overcomes the above problems used technical scheme: the job practices that a kind of circular deep foundation pit support is provided, the pool wall I of the circular pool wall of segmentation reverse construction at first, wherein with first section of the circular pool wall I of segmentation reverse construction as the supporting ring beam, after excavating the required degree of depth, fluid concrete pond base plate underlayer and base plate, from base plate begin the to make progress pool wall II of positive practice construction remaining part, the pool wall I of the circular pool wall of described segmentation reverse construction may further comprise the steps again:
1) according to geologic report and the actual cutting depth of foundation ditch, calculate stake type, length, diameter, arrangement of reinforcement and the spacing of the soldier pile determine to go along with sb. to guard him usefulness, and the thickness of definite pool wall;
When 2) the thickness segmentation of calculating pool wall 2/3～4/5 is constructed from top to bottom, bearing capacity during double as circle supporting ring beam and required arrangement of reinforcement; During the pool wall I of the circular concrete-pool-wall of described 2/3～4/5 thickness of section construction from top to bottom, the bar planting that is provided with the straight screw sleeve that is used to connect perpendicular muscle, load-bearing among the pool wall I is in the suspension muscle and the waterstop of soldier pile, and be provided with the fine-stone concrete sand finish in the soldier pile inboard, and be provided with the Screw arbor with nut at both-ends that is used for fixing inner formword, inner formword is provided with the funnel shaped concrete mouth of building, and carries out casting and compacting of concrete in building the concrete mouth;
3), determine stake type, diameter and the length of the water-stop curtain stake in the soldier pile outside according to geologic report and the actual cutting depth of foundation ditch;
4) measure the stake position that unwrapping wire is decided soldier pile and water-stop curtain stake;
5) construction supporting stake and water-stop curtain stake;
6) earthwork in the foundation ditch is excavated in layering, and each layer digs dark 3m～4m;
7) the circular supporting ring beam and the bank protection concrete of construction supporting stake stake roof pressure top double as pool wall;
8) cooperate excavating of the earthwork, the pool wall I of the circular concrete-pool-wall of 2/3～4/5 thickness of section construction from top to bottom simultaneously.
Above technical scheme also can be regarded as: a kind of job practices of circular deep foundation pit support may further comprise the steps:
1) according to geologic report and the actual cutting depth of foundation ditch, calculate stake type, length, diameter, arrangement of reinforcement and the spacing of the soldier pile determine to go along with sb. to guard him usefulness, and the thickness of definite pool wall;
When 2) the thickness segmentation of calculating pool wall 2/3～4/5 is constructed from top to bottom, bearing capacity during double as circle supporting ring beam and required arrangement of reinforcement; During the pool wall I of the circular concrete-pool-wall of described 2/3～4/5 thickness of section construction from top to bottom, the bar planting that is provided with the straight screw sleeve that is used to connect perpendicular muscle, load-bearing among the pool wall I is in the suspension muscle and the waterstop of soldier pile, and be provided with the fine-stone concrete sand finish in the soldier pile inboard, and be provided with the Screw arbor with nut at both-ends that is used for fixing inner formword, inner formword is provided with the funnel shaped concrete mouth of building, and carries out casting and compacting of concrete in building the concrete mouth;
3), determine stake type, diameter and the length of the water-stop curtain stake in the soldier pile outside according to geologic report and the actual cutting depth of foundation ditch;
4) measure the stake position that unwrapping wire is decided soldier pile and water-stop curtain stake;
5) construction supporting stake and water-stop curtain stake;
6) earthwork in the foundation ditch is excavated in layering, and each layer digs dark 3m～4m;
7) the circular supporting ring beam and the bank protection concrete of construction supporting stake stake roof pressure top double as pool wall;
What 8) cooperate cubic metre of earth excavates, the pool wall I of the circular concrete-pool-wall of 2/3～4/5 thickness of section construction from top to bottom simultaneously, wherein with first section of the circular pool wall I of segmentation reverse construction as the supporting ring beam;
9) excavate the required degree of depth after, fluid concrete pond base plate underlayer and base plate;
10) again from base plate begin the to make progress pool wall II of positive practice construction remaining part.
After adopting above method, the present invention compared with prior art owing to adopted reverse construction and the job practices that positive practice construction combines, has following advantage:
1, foundation ditch degree of safety height, the easy to control and good engineering quality of distortion: because behind foundation pit supporting pile and water-stop curtain pile driving construction, adopt the contrary formula section construction pool wall of doing, form the ring beam of annular, under the native water lateral pressure effect of the soldier pile outside, ring beam mainly bears axial compression, help giving full play to the high advantage of concrete material compressive property, after so the foundation ditch layering is cut the earth, pool wall ring beam and soldier pile form whole common stressed work, therefore foundation ditch degree of safety height is out of shape easy to control and good engineering quality.
2, cost is low and the engineering construction progress is fast: since with adopt foundation ditch in horizontal support and ring beam, column (stake) be set tradition go along with sb. to guard him job practices and compare, the present invention can save horizontal support, ring beam, column (stake), only utilize the pool wall of segmentation reverse construction to replace ring beam, thereby saved the cost of foundation pit supporting construction, and accelerated programming to a certain extent.And because circular deep foundation ditch do not have horizontal support, carry out mechanical type and dig haul volume so help foundation ditch, the top earthwork of circular deep foundation ditch is standing puts muck haulage ramp in the hole, and dump truck directly descend foundation ditch to load and transport the earthwork, so cost is low and the engineering construction progress is fast.
Description of drawings:
Fig. 1 is a sectional structure schematic diagram of the present invention.
Fig. 2 is along the sectional structure schematic diagram of A-A line among Fig. 1.
Fig. 3 is the structural representation of segmentation reverse construction pool wall template of the present invention.
Fig. 4 builds the structural representation of concrete figure for the infundibulate of segmentation reverse construction pool wall template of the present invention.
Fig. 5 is the structural representation of the positive practice construction of the present invention pool wall template.
As shown in the figure: 1, soldier pile, 1.2, hang muscle, 2, the water-stop curtain stake, 3, the supporting ring beam, 4, the bank protection concrete, 5, the gutter, 6, pool wall I, 6.1, the fine-stone concrete sand finish, 6.2, Screw arbor with nut at both-ends.6.3, inner formword, 6.4, annular horizontal steel tube clamp bar, 6.5, waterstop, 6.6, build the concrete mouth, 7, pool wall II, 7.1, the treatment of construction joints layer, 7.2, inner formword, 7.3, the tongue and groove constuction joint, 8, base plate, 9, the base plate underlayer, 10, the precipitation well.
Concrete embodiment:
Below in conjunction with accompanying drawing and concrete embodiment, the present invention is described further:
Job practices as Fig. 1, Fig. 2, Fig. 3, Fig. 4 and a kind of circular deep foundation pit support shown in Figure 5, the pool wall I6 of the circular pool wall of segmentation reverse construction at first, wherein with first section of the circular pool wall I6 of segmentation reverse construction as supporting ring beam 3, after excavating the required degree of depth, fluid concrete pond base plate underlayer 9 and base plate 8, from base plate 8 begin the to make progress pool wall II7 of positive practice construction remaining part, the circular pool wall of described segmentation reverse construction may further comprise the steps again:
1) according to geologic report and the actual cutting depth of foundation ditch, calculate stake type, length, diameter, arrangement of reinforcement and the spacing of the soldier pile 1 determine to go along with sb. to guard him usefulness, and the thickness of definite pool wall;
2) calculate when the thickness segmentation of pool wall 2/3 is contrary constructs as formula bearing capacity during the circular supporting ring beam 3 of double as and required arrangement of reinforcement from top to bottom; During the pool wall I6 of the circular concrete-pool-wall of described 2/3 thickness of section construction from top to bottom, the bar planting that is provided with the straight screw sleeve that is used to connect perpendicular muscle, load-bearing among the pool wall I6 is in the suspension muscle 1.2 and the waterstop 6.5 of soldier pile 1, and be provided with fine-stone concrete sand finish 6.1 in soldier pile 1 inboard, and be provided with the Screw arbor with nut at both-ends 6.2 that is used for fixing inner formword 6.3, inner formword 6.3 is provided with the funnel shaped concrete mouth 6.6 of building, and carries out casting and compacting of concrete in building concrete mouth 6.6;
3), determine stake type, diameter and the length of the water-stop curtain stake 2 in soldier pile 1 outside according to geologic report and the actual cutting depth of foundation ditch;
4) measure the stake position that unwrapping wire is decided soldier pile 1 and water-stop curtain stake 2;
5) double soldier pile 1 is adopted in construction supporting stake 1 and water-stop curtain stake 2, lays the soldier pile 1 of row's circle distribution again in the outside of water-stop curtain 2;
6) earthwork in the foundation ditch is excavated in layering, and each layer digs dark 3m;
7) the circular supporting ring beam 3 and the bank protection concrete 4 of 1 roof pressure top of construction supporting stake double as pool wall, circular supporting ring beam 3 is embedded with joint bar, bank protection concrete 4 is provided with gutter 5, and in the gutter 5 arranged outside precipitation well 10;
8) cooperate excavating of the earthwork, the pool wall I 6 of the circular concrete-pool-wall of 2/3 thickness of section construction from top to bottom simultaneously, wherein with first section of pool wall I6 as supporting ring beam 3, perpendicular muscle among the pool wall I6 between each section adopts straight screw sleeve to connect, and be provided with the suspension muscle 1.2 that be used for load-bearing and the waterstop 6.5 of bar planting in soldier pile 1, simultaneously during formwork erection earlier with the soldier pile 1 inboard pea gravel concreten that sprays, the back becomes fine-stone concrete sand finish 6.1 with the floating camber face of cement mortar, one end bar planting of split bolt 6.2 is in the soldier pile 1 of going along with sb. to guard him, the other end is welded with the detent rail of inner formword 6.3, and be provided with fixedly inner formword 6.3 of annular horizontal steel tube clamp bar 6.4, split bolt 6.2 answers length in reserve to be used for just doing the pool wall construction, and every section sidewall inner formword 6.3 suitable for reading makes the funnel shaped concrete mouth 6.6 of building, to in building concrete mouth 6.6, carry out during disturbing concrete, after the moulding with the concrete chisel removal of ledge.
Described fluid concrete pond base plate underlayer 9 and base plate 8 are meant lays base plate underlayer 9 earlier, base plate underlayer 9 adopts " five limit methods " (cut the earth in the limit, shop, limit hardcore bed, limit are made the concrete bed course, fetal membrane, limit cutter engineering piles are laid bricks in the limit) assault construction, to stablize foundation pit enclosure structure and preliminary sealing, after carry out colligation base plate reinforcing bar, and setting is erected joint and the waterstop that muscle is connected with contrary sequence method with positive practice pool wall, carry out concreting at last, and form the tongue and groove constuction joint in the position of positive practice pool wall.
The horizontal construction joint of positive practice pool wall II7 and the horizontal construction joint of contrary sequence method pool wall I6 stagger.Vertical constuction joint cutter hair between positive practice pool wall II7 and the contrary sequence method pool wall I6 is cleaned, and brush cementing agent or cement paste becomes treatment of construction joints layer 7.1 on pool wall I6, at Screw arbor with nut at both-ends 6.2 away from the end of the pool wall I6 detent rail of burn-oning, and, carry out casting and compacting of concrete at last with the fixing inner formword 7.2 of annular horizontal steel tube clamp bar 6.4.
A kind of job practices of circular deep foundation pit support, the pool wall I6 of the circular pool wall of segmentation reverse construction at first, wherein with first section of the circular pool wall I6 of segmentation reverse construction as supporting ring beam 3, after excavating the required degree of depth, fluid concrete pond base plate underlayer 9 and base plate 8, from base plate 8 begin the to make progress pool wall II7 of positive practice construction remaining part, the circular pool wall of described segmentation reverse construction may further comprise the steps again:
1) according to geologic report and the actual cutting depth of foundation ditch, calculate stake type, length, diameter, arrangement of reinforcement and the spacing of the soldier pile 1 determine to go along with sb. to guard him usefulness, and the thickness of definite pool wall;
When 2) the thickness segmentation of calculating pool wall 4/5 is constructed from top to bottom, bearing capacity during double as circle supporting ring beam 3 and required arrangement of reinforcement; During the pool wall I6 of the circular concrete-pool-wall of described 4/5 thickness of section construction from top to bottom, the bar planting that is provided with the straight screw sleeve that is used to connect perpendicular muscle, load-bearing among the pool wall I6 is in the suspension muscle 1.2 and the waterstop 6.5 of soldier pile 1, and be provided with fine-stone concrete sand finish 6.1 in soldier pile 1 inboard, and be provided with the Screw arbor with nut at both-ends 6.2 that is used for fixing inner formword 6.3, inner formword 6.3 is provided with the funnel shaped concrete mouth 6.6 of building, and carries out casting and compacting of concrete in building concrete mouth 6.6;
3), determine stake type, diameter and the length of the water-stop curtain stake 2 in soldier pile 1 outside according to geologic report and the actual cutting depth of foundation ditch;
4) measure the stake position that unwrapping wire is decided soldier pile 1 and water-stop curtain stake 2;
5) double soldier pile 1 is adopted in construction supporting stake 1 and water-stop curtain stake 2, lays the soldier pile 1 of row's circle distribution again in the outside of water-stop curtain 2;
6) earthwork in the foundation ditch is excavated in layering, and each layer digs dark 4m;
7) the circular supporting ring beam 3 and the bank protection concrete 4 of 1 roof pressure top of construction supporting stake double as pool wall, circular supporting ring beam 3 is embedded with joint bar, bank protection concrete 4 is provided with gutter 5, and in the gutter 5 arranged outside precipitation well 10;
8) cooperate excavating of the earthwork, the pool wall I6 of the circular concrete-pool-wall of 4/5 thickness of section construction from top to bottom simultaneously, wherein with first section of pool wall I6 as supporting ring beam 3, perpendicular muscle among the pool wall I6 between each section adopts straight screw sleeve to connect, and be provided with the suspension muscle 1.2 that be used for load-bearing and the waterstop 6.5 of bar planting in soldier pile 1, simultaneously during formwork erection earlier with the soldier pile 1 inboard pea gravel concreten that sprays, the back becomes fine-stone concrete sand finish 6.1 with the floating camber face of cement mortar, one end bar planting of split bolt 6.2 is in the soldier pile 1 of going along with sb. to guard him, the other end is welded with the detent rail of inner formword 6.3, and be provided with fixedly inner formword 6.3 of annular horizontal steel tube clamp bar 6.4, split bolt 6.2 answers length in reserve to be used for just doing the pool wall construction, and every section sidewall inner formword 6.3 suitable for reading makes the funnel shaped concrete mouth 6.6 of building, to in building concrete mouth 6.6, carry out during disturbing concrete, after the moulding with the concrete chisel removal of ledge.
Described fluid concrete pond base plate underlayer 9 and base plate 8 are meant lays base plate underlayer 9 earlier, base plate underlayer 9 adopts " five limit methods " (cut the earth in the limit, shop, limit hardcore bed, limit are made the concrete bed course, fetal membrane, limit cutter engineering piles are laid bricks in the limit) assault construction, to stablize foundation pit enclosure structure and preliminary sealing, after carry out colligation base plate reinforcing bar, and setting is erected joint and the waterstop that muscle is connected with contrary sequence method with positive practice pool wall, carry out concreting at last, and form the tongue and groove constuction joint in the position of positive practice pool wall.
The horizontal construction joint of positive practice pool wall II7 and the horizontal construction joint of contrary sequence method pool wall I6 stagger.Vertical constuction joint cutter hair between positive practice pool wall II7 and the contrary sequence method pool wall I6 is cleaned, and brush cementing agent or cement paste becomes treatment of construction joints layer 7.1 on pool wall I6, at Screw arbor with nut at both-ends 6.2 away from the end of the pool wall I6 detent rail of burn-oning, and, carry out casting and compacting of concrete at last with the fixing inner formword 7.2 of annular horizontal steel tube clamp bar 6.4.
Above embodiment only is a preferable embodiment of the present invention, and the present invention is not limited to above embodiment, also allow other change as: according to geological conditions the precipitation well can be set, also single soldier pile etc. can be set.
Claims (3)
1, a kind of job practices of circular deep foundation pit support, it is characterized in that: the pool wall I (6) of the circular pool wall of segmentation reverse construction at first, wherein with first section of the circular pool wall I of segmentation reverse construction as supporting ring beam (3), after excavating the required degree of depth, fluid concrete pond base plate underlayer (9) and base plate (8), from base plate (8) begin the to make progress pool wall II (7) of positive practice construction remaining part, the pool wall I (6) of the circular pool wall of described segmentation reverse construction may further comprise the steps again:
1) according to geologic report and the actual cutting depth of foundation ditch, calculate stake type, length, diameter, arrangement of reinforcement and the spacing of the soldier pile (1) of determining to go along with sb. to guard him usefulness, and the thickness of definite pool wall;
When 2) the thickness segmentation of calculating pool wall 2/3～4/5 is constructed from top to bottom, bearing capacity during the circular supporting ring beam of double as (3) and required arrangement of reinforcement; During the pool wall I (6) of the circular concrete-pool-wall of described 2/3～4/5 thickness of section construction from top to bottom, the bar planting that is provided with the straight screw sleeve that is used to connect perpendicular muscle, load-bearing among the pool wall I (6) is in the suspension muscle (1.2) and the waterstop (6.5) of soldier pile (1), and be provided with fine-stone concrete sand finish (6.1) in soldier pile (1) inboard, and be provided with the Screw arbor with nut at both-ends (6.2) that is used for fixing inner formword (6.3), inner formword (6.3) is provided with the funnel shaped concrete mouth (6.6) of building, and carries out casting and compacting of concrete in building concrete mouth (6.6);
3), determine stake type, diameter and the length of the water-stop curtain stake (2) in soldier pile (1) outside according to geologic report and the actual cutting depth of foundation ditch;
4) measure the stake position that unwrapping wire is decided soldier pile (1) and water-stop curtain stake (2);
5) construction supporting stake (1) and water-stop curtain stake (2);
6) earthwork in the foundation ditch is excavated in layering, and each layer digs dark 3m～4m;
The circular supporting ring beam (3) and the bank protection concrete (4) of 7) construction supporting stake (1) stake roof pressure top double as pool wall;
8) cooperate excavating of the earthwork, the pool wall I (6) of the circular concrete-pool-wall of 2/3～4/5 thickness of section construction from top to bottom simultaneously.
2, the job practices of circular deep foundation pit support according to claim 1 is characterized in that: described circular supporting ring beam (3) is embedded with joint bar when construction.
3, the job practices of circular deep foundation pit support according to claim 1, it is characterized in that: described fluid concrete pond base plate underlayer (9) and base plate (8) are meant lays base plate underlayer (9) earlier, back assembling reinforcement, and setting is erected joint and the waterstop that muscle is connected with contrary sequence method with positive practice pool wall, build at last, and form the tongue and groove constuction joint in the position of positive practice pool wall.
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| CN200810120096A CN100585094C (en) | 2008-07-18 | 2008-07-18 | Construction method of circular deep foundation pit support |
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| CN200810120096A CN100585094C (en) | 2008-07-18 | 2008-07-18 | Construction method of circular deep foundation pit support |
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| CN100585094C true CN100585094C (en) | 2010-01-27 |
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