CN103452118A - Foundation pit slope soil-nailing dewatering support construction method - Google Patents
Foundation pit slope soil-nailing dewatering support construction method Download PDFInfo
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- CN103452118A CN103452118A CN201310093758XA CN201310093758A CN103452118A CN 103452118 A CN103452118 A CN 103452118A CN 201310093758X A CN201310093758X A CN 201310093758XA CN 201310093758 A CN201310093758 A CN 201310093758A CN 103452118 A CN103452118 A CN 103452118A
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- 238000010276 construction Methods 0.000 title claims abstract description 34
- 239000002689 soil Substances 0.000 claims abstract description 77
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 54
- 238000003780 insertion Methods 0.000 claims abstract description 11
- 230000037431 insertion Effects 0.000 claims abstract description 11
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 9
- 239000010959 steel Substances 0.000 claims abstract description 9
- 239000004568 cement Substances 0.000 claims abstract description 4
- 239000007921 spray Substances 0.000 claims description 31
- 238000001556 precipitation Methods 0.000 claims description 21
- 238000009412 basement excavation Methods 0.000 claims description 15
- 230000015572 biosynthetic process Effects 0.000 claims description 9
- 238000013459 approach Methods 0.000 claims description 8
- 238000002347 injection Methods 0.000 claims description 7
- 239000007924 injection Substances 0.000 claims description 7
- 238000000034 method Methods 0.000 claims description 5
- 239000011148 porous material Substances 0.000 claims description 5
- 230000005484 gravity Effects 0.000 claims description 4
- 238000004873 anchoring Methods 0.000 claims description 3
- 239000004744 fabric Substances 0.000 claims description 3
- 229920002457 flexible plastic Polymers 0.000 claims description 3
- 229920003023 plastic Polymers 0.000 claims description 3
- 238000002627 tracheal intubation Methods 0.000 claims description 3
- 238000007569 slipcasting Methods 0.000 description 7
- 238000009825 accumulation Methods 0.000 description 4
- 239000004927 clay Substances 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 230000003014 reinforcing effect Effects 0.000 description 3
- 230000007547 defect Effects 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 239000011435 rock Substances 0.000 description 2
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
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Abstract
The invention discloses a foundation pit slope soil-nailing dewatering support construction method. The construction method includes firstly, inserting a hollow insertion pipe into a soil body in a mode that the hollow insertion pipe with the end and the side wall both provided with jet holes is injected with water to jet the soil body, secondly, connecting a water pump with the hollow insertion pipe to pump water in the soil body and a foundation pit, thirdly, injecting cement paste into the hollow insertion pipe to form an anti-pulling anchor pile, and finally, connecting the anti-pulling anchor pile and a steel wire mesh into a whole prior to whitewashing and plastering to form a slope support. The construction method has the advantage of suitability for construction in rainy soft soil areas, and is shorter in construction period, low in energy and consumption, green, environmentally friendly and higher in construction cost as compared with the prior art.
Description
Technical field
The invention belongs to construction engineering technical field, relate to foundation pit dewatering side slope supporting construction method.
Background technology
The provisional mine pit excavated for building foundation is called foundation ditch.Foundation ditch belongs to temporary work, and its effect is to provide a space, makes basic building operations operation be able to carry out according to the specified position of design.
For guaranteeing the safety of Underground Construction and foundation ditch surrounding enviroment, a gear, reinforcing and safeguard measure that foundation pit side-wall and surrounding enviroment are adopted are called pattern foundation pit supporting structure.Wherein soil nailing wall foundation pit support is the most common and most important a kind of Foundation Pit.
Soil nail wall is reinforced on the spot by soil nail wall by the natural soil body and combine with spraying the concrete panel, forms a similar gravity retaining wall and carrys out the soil pressure after resistance wall with this; Thereby keep the stable of excavation face.Soil nail wall arranges by boring, joint bar, slip casting, generally claims grouting rock bolt, also can directly squeeze into bar reinforcement, angle steel, steel pipe formation soil nailing.The way that the spray anchor net that the way of soil nail wall and reinforcing tunnel, mine are used is reinforced rock mass is similar, therefore also referred to as spray anchor net reinforcing side slope or spray anchor net barricade.
Existing pattern foundation pit supporting structure adopts heavy excavation, soil-nail wall support, well-points dewatering construction more.But, in soft clay area, rainwater is more, foundation trench muddy water mixes, can't normal construction; Nail Construction, be difficult to pore-forming.Soil excavation, generally adopt side slope well-points dewatering, the bright row of excavation foundation trench plash, and place is muddy, is difficult to grooving, the difficulty of drawing water, and the mud sand gathers; Adopt dewatering measure, wait for that rain stops weather, delay soil excavation, side slope supporting construction duration, construction quality and side slope safety are difficult to guarantee.
Summary of the invention
For this reason, technical problem to be solved by this invention is to provide a kind of excavation slope soil nailing precipitation construction method for supporting that the more soft clay area of rainwater is constructed that is adapted at, in conjunction with the complex technique of foundation pit soil nailing and side slope precipitation, the deficiency existed to overcome prior art.
For solving the problems of the technologies described above, the present invention adopts following technical scheme:
A kind of excavation slope soil nailing precipitation construction method for supporting, be characterised in that, the steps include:
S1, making hollow intubate, described hollow intubate has spray-hole at tube head, and sidewall is distributed with the side spray hole with valve;
S2, in the following way successively multiple spot to inserting the hollow intubate in the soil body: the hollow intubate is connected with water pump, to water filling in the hollow intubate, water is ejected from the spray-hole of tube head, impact the soil body, on the soil body, cheat in the formation hole; Then the hollow intubate is inserted to the soil body along the hole, hole; In insertion hollow intubate process, when discovery side spray hole approaches the pit hole position of side slope, open successively the valve on the side spray hole, make the side direction soil body of water from the ejection of side spray hole, impact pit hole, form groove along the intubate direction, drainage is portalled and is cheated interior loose earth.
S3, after the hollow intubate approaches and to insert the soil body fully, stop water pump to water filling in the hollow intubate, the hollow intubate is connected to pump drainage soil body ponding, reduction side slope and Water Level in Foundation Pit with vacuum pump;
After S4, pump drainage soil body ponding, to injected water mud in the hollow intubate, anchoring hollow intubate and the soil body, make the hollow intubate form pulling resistant anchor pile;
S5, adopt steel fabric sheet and the hollow intubate of the formation pulling resistant anchor pile formation slope retaining of plastering that is connected and whitewashes.
In described step S4, after injected water mud, also in time the hollow intubate is connected with vacuum pump, continues the precipitation that draws water.
In described step S2, the hydraulic pressure of the water in described injection hollow intubate is 0.3-0.5Mpa; Perhaps, in described step S2, the hydraulic pressure of the water in described injection hollow intubate is 0.1-0.3Mpa, and coordinates the mode that adopts gravity vibratory impulse hollow intubate by the hollow intubate insertion soil body, and vibratory impulse pressure is 0.1-0.5MPa.
The pressure of the cement paste of described injection hollow intubate is 0-0.5MPa; The pressure that vacuum is drawn water is 0-0.5MPa.
In the present invention, described hollow intubate is steel pipe, hard plastic tube or flexible plastic tube.
In the present invention, the termination of described hollow intubate is only taper hole or the only hole of flat mouth or flat mouth diplopore or flat mouth three holes or four taper holes or five taper holes.
In the present invention, described side spray hole is arranged symmetrically with or is plum blossom-shaped and arranges.
The length of described hollow intubate is 6m, and diameter is 48mm, and wall thickness is 1.2mm, and the aperture of described spray-hole is 16mm, and the aperture in described side spray hole is 8mm.Described side spray hole is 600mm along the spacing of hollow intubation length direction.
Adopt technique scheme, the present invention compared with prior art has following features:
1, soil body pore-forming is impacted in the side spray hole and the ejection of tube head spray-hole that utilize water to pass through on the hollow intubate, makes the hollow intubate to insert smoothly the soil body, has overcome existing soil nailing and has been difficult to the defect of pore-forming at soft soil construction.
2,, by vibratory impulse hollow cannula distal end, accelerate hollow intubate insertion speed.
3, utilize the side spray hole of the hollow intubate of vacuum pump by inserting the soil body and tube head spray-hole exhaust pipe internal water accumulation and the soil body moisture, layering hollow intubate can reduce deep foundation ditch heavy excavation slope underground water position, make the foundation ditch internal water accumulation discharge in time, avoided the mud sandy soil muddy and can't construct in gathering, cheating.
4, slip casting hollow intubate is inserted dark, and anchored force is large, improves the firm performance of slope soil after slip casting.After slip casting, the hollow intubate still can be made excavation slope well-points dewatering pipe pump drainage precipitation.
Therefore, the present invention has advantages of that being adapted at the more soft clay area of rainwater is constructed, and adopts this job practices, compared to existing technology can the reduction of erection time, and the low energy low consumption, environmental protection, and can improve construction quality.
The accompanying drawing explanation
Below in conjunction with accompanying drawing, with concrete enforcement, the present invention is described in detail:
Fig. 1 is flow chart of steps of the present invention;
A kind of structural representation that Fig. 2 is the hollow intubate;
The another kind of structural representation that Fig. 2 A is the hollow intubate;
Fig. 3 be in Fig. 2 A-A to sectional view;
Fig. 4 is hollow intubate termination the first cross section structure form;
Fig. 4 A is hollow intubate termination the second cross section structure form;
Fig. 4 B is the third cross section structure form of hollow intubate termination;
Fig. 4 C is the 4th kind of hollow intubate termination cross section structure form;
Fig. 4 D is the 5th kind of hollow intubate termination cross section structure form;
The structural representation that Fig. 5 is valve;
Fig. 5 A is Fig. 5 side schematic view;
Fig. 6 is pattern foundation pit supporting structure side structure schematic diagram.
The specific embodiment
As shown in Figure 1, excavation slope soil nailing precipitation construction method for supporting of the present invention, it adopts following steps to be:
S1, making hollow intubate, shown in Fig. 2 and Fig. 2 A, the hollow intubate 100 of making has spray-hole 110 at tube head, and sidewall has the side spray hole 120 be distributed with valve 130.
This hollow intubate can be for steel pipe, also can be hard plastic tube or flexible plastic tube.Shown in Fig. 2 and Fig. 2 A, this hollow intubate 100 can be structure as a whole, and can be also Split type structure.For integral mechanism, comparison is simple, only hollow intubate 100 front ends need be struck flat and reserve spray-hole and get final product.For Split type structure, at the front end of hollow intubate 100, connect a termination with spray-hole 101.The termination of hollow intubate is only taper hole structure or flat mouthful of only pore structure (as shown in Figure 4) or flat mouth double-pore structure (as shown in Figure 4 A) or flat mouth three pore structures (as shown in Figure 4 B) or four taper hole structures (as shown in Figure 4 C) or five taper hole structures (as shown in Figure 4 D).The length of hollow intubate 100 is 6m, and the aperture of spray-hole 110 is 16mm.
Shown in Fig. 3, the arrangement form in side spray hole 120 can be symmetry, cross is symmetrical or be plum blossom distributes.120 aperture, side spray hole is 8mm, along hollow intubation length direction, the spacing 600mm between the side spray hole.
Shown in Fig. 5 and Fig. 5 A, valve 130 in the side spray hole is a bolt, bolt column 131 at bolt has the axial hole 133 that an end extends through bolt end face 132, the position that approaches bolt head 134 at bolt column 131 have with axial hole 133, be communicated with radially run through through hole 134.When the bolt column 131 of valve 130 all is spun on side spray hole 120, at this moment this jam pot cover is blocked the side spray hole, when valve 130 outwards screws out, exposes radially through hole 135, and at this moment current are from ejecting from through hole 135 radially through axial hole 133.
The mode of S2, the interior injection of employing hollow intubate high-pressure water jet successively multiple spot is inserted the soil body by the hollow intubate.Concrete mode is: the hollow intubate is connected with water pump, to water filling in the hollow intubate, water is ejected from the spray-hole of tube head, impact the soil body, form the hole, hole on the soil body; Then the hollow intubate is inserted to the soil body along the hole, hole; In inserting hollow intubate process, when the side spray hole approaches the pit hole position of side slope, open successively the valve on the side spray hole, make water impact the side direction soil body of pit hole from the ejection of side spray hole, form groove along the intubate direction, loose earth in the drain hole hole.
In this step, the hydraulic pressure of the water in injection hollow intubate is 0.3-0.5MPa.
In addition, the hydraulic pressure that injects the water in the hollow intubate can be also 0-0.3MPa, and coordinates the mode that adopts gravity vibratory impulse hollow intubate by the hollow intubate insertion soil body, and vibratory impulse pressure is 0-0.5MPa.
S3, after the hollow intubate approaches and to insert the soil body fully, stop water pump to water filling in the hollow intubate, the hollow intubate is connected to pump drainage soil body ponding, reduction side slope and Water Level in Foundation Pit with vacuum pump.The pressure that vacuum is drawn water is 0-0.5MPa.
After S4, pump drainage soil body ponding, to injected water mud in the hollow intubate, anchoring hollow intubate and the soil body, make the hollow intubate form pulling resistant anchor pile.The pressure that injects the cement paste of hollow intubate is 0-0.5MPa.After injected water mud, according to the soil body and foundation ditch ponding situation, can in time the hollow intubate be connected with vacuum pump again, continue the precipitation that draws water.
S5, adopt steel fabric sheet and the multiple spot hollow intubate of the formation pulling resistant anchor pile formation slope retaining of plastering that is connected and whitewashes, as shown in Figure 6.Wherein, the tail end 102 of hollow intubate 100 also exposes slope retaining 200 surfaces 201 in order to follow-up can also the connection with vacuum pump realize continuing to draw water.
Be exactly more than excavation slope soil nailing precipitation construction method for supporting of the present invention, compared with prior art there is following features:
1, soil body pore-forming is impacted in the side spray hole and the ejection of tube head spray-hole that utilize water to pass through on the hollow intubate, makes the hollow intubate to insert smoothly the soil body, has overcome existing soil nailing and has been difficult to the defect of pore-forming at soft soil construction.
2,, by vibratory impulse hollow cannula distal end, accelerate hollow intubate insertion speed.
3, utilize the side spray hole of the hollow intubate of vacuum pump by inserting the soil body and tube head spray-hole exhaust pipe internal water accumulation and the soil body moisture, layering hollow intubate can reduce deep foundation ditch heavy excavation slope underground water position, make the foundation ditch internal water accumulation discharge in time, avoided the mud sandy soil muddy and can't construct in gathering, cheating.
4, slip casting hollow intubate is inserted dark, and anchored force is large, improves the firm performance of slope soil after slip casting.After slip casting, the hollow intubate still can be made excavation slope well-points dewatering pipe pump drainage precipitation.
Therefore, the present invention has advantages of that being adapted at the more soft clay area of rainwater is constructed, and adopts this job practices, compared to existing technology can the reduction of erection time, and the low energy low consumption, environmental protection, and can improve construction quality.
Claims (10)
1. an excavation slope soil nailing precipitation construction method for supporting, be characterised in that, the steps include:
S1, making hollow intubate, described hollow intubate has spray-hole at tube head, and sidewall is distributed with the side spray hole with valve;
S2, in the following way successively multiple spot to inserting the hollow intubate in the soil body: the hollow intubate is connected with water pump, to water filling in the hollow intubate, water is ejected from the spray-hole of tube head, impact the soil body, on the soil body, cheat in the formation hole; Then the hollow intubate is inserted to the soil body along the hole, hole; In insertion hollow intubate process, when discovery side spray hole approaches the pit hole position of side slope, open successively the valve on the side spray hole, make the side direction soil body of water from the ejection of side spray hole, impact pit hole, form groove along the intubate direction, drainage is portalled and is cheated interior loose earth.
S3, after the hollow intubate approaches and to insert the soil body fully, stop water pump to water filling in the hollow intubate, the hollow intubate is connected to pump drainage soil body ponding, reduction side slope and Water Level in Foundation Pit with vacuum pump;
After S4, pump drainage soil body ponding, to injected water mud in the hollow intubate, anchoring hollow intubate and the soil body, make the hollow intubate form pulling resistant anchor pile;
S5, adopt steel fabric sheet and the hollow intubate of the formation pulling resistant anchor pile formation slope retaining of plastering that is connected and whitewashes.
2. soil nailing precipitation construction method for supporting according to claim 1, is characterized in that: in described step S4, after injected water mud, in time the hollow intubate is connected with vacuum pump, continues the precipitation that draws water.
3. soil nailing precipitation construction method for supporting according to claim 1 and 2 is characterized in that: in described step S2, the pressure of the water in described injection hollow intubate is 0.3-0.5MPa.
4. soil nailing precipitation construction method for supporting according to claim 1 and 2, it is characterized in that: in described step S2, the hydraulic pressure of the water in described injection hollow intubate is 0-0.3MPa, and coordinating the mode that adopts gravity vibratory impulse hollow intubate by the hollow intubate insertion soil body, vibratory impulse pressure is 0-0.5MPa.
5. soil nailing precipitation construction method for supporting according to claim 1 is characterized in that: the pressure that injects the cement paste of hollow intubate is 0-0.5MPa; The pressure that vacuum is drawn water is 0-0.5MPa.
6. according to the described soil nailing precipitation of the arbitrary claim of claim 1 to 4 construction method for supporting, it is characterized in that: the tail end of described hollow intubate exposes described slope retaining surface.
7. soil nailing precipitation construction method for supporting according to claim 1, it is characterized in that: described hollow intubate is steel pipe, hard plastic tube or flexible plastic tube.
8. soil nailing precipitation construction method for supporting according to claim 1 is characterized in that: the termination of described hollow intubate is only taper hole structure or flat mouthful solely holes mechanism or flat mouthful of double-pore structure or flat mouthful of three pore structure or four taper hole structures or five taper hole structures; Described side spray hole is arranged symmetrically with or is plum blossom-shaped and arranges.
9. soil nailing precipitation construction method for supporting according to claim 1, it is characterized in that: the length of described hollow intubate is 6m, diameter is 48mm, wall thickness is 1.2mm, the aperture of described spray-hole is 16mm, the aperture in described side spray hole is 8mm, and described side spray hole is 600mm along the spacing of hollow intubation length direction.
10. soil nailing precipitation construction method for supporting according to claim 1, it is characterized in that: described valve is a bolt, there is the axial hole that an end extends through the bolt end face in the bolt column of described bolt, described bolt column in the position that approaches bolt head, have with axial hole, be communicated with radially run through through hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310093758.XA CN103452118B (en) | 2013-03-22 | 2013-03-22 | A kind of excavation slope soil nailing de-watering and shoring construction method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310093758.XA CN103452118B (en) | 2013-03-22 | 2013-03-22 | A kind of excavation slope soil nailing de-watering and shoring construction method |
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| Publication Number | Publication Date |
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| CN103452118A true CN103452118A (en) | 2013-12-18 |
| CN103452118B CN103452118B (en) | 2015-10-14 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105401606A (en) * | 2015-12-14 | 2016-03-16 | 神翼航空器科技（天津）有限公司 | Deep drawing pipe type inclination correcting method and deep drawing device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1190145A (en) * | 1997-12-26 | 1998-08-12 | 北京市城市建设工程研究院 | Method for lowering level of ground water |
| CN2568815Y (en) * | 2002-05-31 | 2003-08-27 | 刘维杰 | Strengthening slip casting anchor stock |
| KR20060036673A (en) * | 2004-10-26 | 2006-05-02 | 최영근 | Multi-protector system |
| CN2869132Y (en) * | 2006-03-01 | 2007-02-14 | 冯克俊 | Intubation type vacuum base pit deep-well precipitation device |
| CN2913458Y (en) * | 2006-07-03 | 2007-06-20 | 高祥明 | Supporting anchoring construction for soil nailed wall |
| CN101560775A (en) * | 2008-04-16 | 2009-10-21 | 李志宏 | Composite soil nailing wall structure |
| CN101748734A (en) * | 2008-12-04 | 2010-06-23 | 中国二十冶建设有限公司 | Foundation pit side slope sandy soil drainage method |
| CN102051882A (en) * | 2010-11-23 | 2011-05-11 | 北京市公路桥梁建设集团有限公司 | Anchor pipe and anchor pipe type soil nailing wall support method |
| CN102392452A (en) * | 2011-11-29 | 2012-03-28 | 北京建工一建工程建设有限公司 | Construction method for forming holes on soil nail wall by water punching |
-
2013
- 2013-03-22 CN CN201310093758.XA patent/CN103452118B/en not_active Expired - Fee Related
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1190145A (en) * | 1997-12-26 | 1998-08-12 | 北京市城市建设工程研究院 | Method for lowering level of ground water |
| CN2568815Y (en) * | 2002-05-31 | 2003-08-27 | 刘维杰 | Strengthening slip casting anchor stock |
| KR20060036673A (en) * | 2004-10-26 | 2006-05-02 | 최영근 | Multi-protector system |
| CN2869132Y (en) * | 2006-03-01 | 2007-02-14 | 冯克俊 | Intubation type vacuum base pit deep-well precipitation device |
| CN2913458Y (en) * | 2006-07-03 | 2007-06-20 | 高祥明 | Supporting anchoring construction for soil nailed wall |
| CN101560775A (en) * | 2008-04-16 | 2009-10-21 | 李志宏 | Composite soil nailing wall structure |
| CN101748734A (en) * | 2008-12-04 | 2010-06-23 | 中国二十冶建设有限公司 | Foundation pit side slope sandy soil drainage method |
| CN102051882A (en) * | 2010-11-23 | 2011-05-11 | 北京市公路桥梁建设集团有限公司 | Anchor pipe and anchor pipe type soil nailing wall support method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105401606A (en) * | 2015-12-14 | 2016-03-16 | 神翼航空器科技（天津）有限公司 | Deep drawing pipe type inclination correcting method and deep drawing device |
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| CN103452118B (en) | 2015-10-14 |
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Effective date of registration: 20151223 Address after: 200135 Pudong New Area Century Avenue, Shanghai, No. 27, layer 1568 Patentee after: CHINA CONSTRUCTION EIGHTH ENGINEERING DIVISION Co.,Ltd. Address before: 200434 Shanghai city Yangpu District binlu No. 18 room 2201 Patentee before: Shanghai Branch, China State Construction Co.,Ltd. |
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