CN110117959A - One kind closing on rivers base pit stand construction - Google Patents
One kind closing on rivers base pit stand construction Download PDFInfo
- Publication number
- CN110117959A CN110117959A CN201910419699.8A CN201910419699A CN110117959A CN 110117959 A CN110117959 A CN 110117959A CN 201910419699 A CN201910419699 A CN 201910419699A CN 110117959 A CN110117959 A CN 110117959A
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- construction
- crown beam
- concrete
- steel sheet
- sheet pile
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- 238000010276 construction Methods 0.000 title claims abstract description 64
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 61
- 239000010959 steel Substances 0.000 claims abstract description 61
- 239000002689 soil Substances 0.000 claims abstract description 20
- 238000009412 basement excavation Methods 0.000 claims abstract description 7
- 239000004568 cement Substances 0.000 claims abstract description 7
- 238000005266 casting Methods 0.000 claims abstract description 4
- 230000003014 reinforcing effect Effects 0.000 claims abstract description 4
- 239000004576 sand Substances 0.000 claims description 16
- 238000000034 method Methods 0.000 claims description 15
- 238000009434 installation Methods 0.000 claims description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 7
- 229920000742 Cotton Polymers 0.000 claims description 3
- -1 and length 6m Substances 0.000 claims description 3
- 230000005611 electricity Effects 0.000 claims description 3
- 239000003673 groundwater Substances 0.000 claims description 3
- 238000003780 insertion Methods 0.000 claims description 3
- 230000037431 insertion Effects 0.000 claims description 3
- 239000000463 material Substances 0.000 claims description 3
- 230000002265 prevention Effects 0.000 claims description 3
- 230000002787 reinforcement Effects 0.000 claims description 3
- 230000011218 segmentation Effects 0.000 claims description 3
- 238000003466 welding Methods 0.000 claims description 3
- 230000015572 biosynthetic process Effects 0.000 claims description 2
- 239000004575 stone Substances 0.000 claims description 2
- 230000018109 developmental process Effects 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 230000001133 acceleration Effects 0.000 description 1
- 210000001367 artery Anatomy 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D17/00—Excavations; Bordering of excavations; Making embankments
- E02D17/02—Foundation pits
- E02D17/04—Bordering surfacing or stiffening the sides of foundation pits
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Revetment (AREA)
- Bulkheads Adapted To Foundation Construction (AREA)
Abstract
The present invention discloses one kind and closes on rivers base pit stand construction, comprising the following steps: (1) construction of steel sheet pile；(2) crown beam position soil cement is abolished and crown beam periphery earth excavation；(3) crown beam and retaining wall construction；(4) concrete tiltedly throws support bracket construction under crown beam: after the completion of support, support bracket position is tiltedly thrown to concrete under crown beam locally unloads soil to oblique throwing support bracket bottom -500mm, dabbing is carried out to the concrete at interface, rebar surface is cleaned out, mechanical splice connects reinforcing bar, built-in fitting is installed, set up scaffold fixed form, pass through pre-buried pvc pipe casting concrete, concrete is poured using slightly expanded concrete to pre-buried pvc pipe tube top, after the completion of the concrete setting for tiltedly throwing support, removes scaffold fixed form and complete and close on rivers foundation pit support construction.Construction method of the present invention greatly improves work efficiency, and shortens the construction period, and reduces foundation pit risk, evades phenomenon of doing over again, improves supporting construction quality.
Description
Technical field
The present invention relates to the technical fields of construction, and in particular to one kind closes on rivers base pit stand construction.
Background technique
With the continuous development of China's economy and the acceleration of urbanization process, each big city starts to build Large Underground one after another
Engineering.Play a significant role using the underground space, the development underground space to promotion urban economy and Community health's development.Deep basal pit
It is an important component part in underground engineering, how ensures deep pit monitor in the construction process, solves leakage and ensure week
Unaffected side structures are must be taken into consideration and solve the problems, such as in construction.
The higher and higher foundation pit sideline of land utilization ratio apart from red line it is more and more compacter in the case where, deep basal pit is in city
In excavated, and surrounding situations such as there are traffic main artery, built construction, rivers, periphery supporting, supporting are carried out using fender post
There are height differences for top mark height and natural ground elevation.Difficulty of construction is big, and safety coefficient requires high.Southern water source is plentiful, and soil property is mostly
Sandy silt, soil property meets aquation sand, and permeability is very high.Subsequent supporting process is solved using slope above supporting before to apply
The problem of work, often occur the gradient not enough, collapse, leak, impeded drainage phenomena such as, the drift sand in the case of high water level leads to crown beam
The problems such as can not constructing with retaining wall.
Summary of the invention
Goal of the invention: present invention aims in view of the deficiencies of the prior art, provide one kind and close on rivers pattern foundation pit supporting structure to apply
Work method, the method for the invention can be used closing on the plentiful soft clay area of rivers or water source.
Technical solution: one kind of the present invention closes on rivers base pit stand construction, comprising the following steps:
(1) construction of steel sheet pile: cause crown beam and retaining wall that can not construct to solve the drift sand in the case of rivers high water level
Problem carries out prevention drift sand using steel sheet pile, and steel sheet pile uses 28a channel steel, and length 6m, steel sheet pile is away from concrete retaining wall
300mm, steel sheet pile are inserted into stake position using manipulator, complete in crown beam and retaining wall construction, concrete retaining wall intensity reaches 70%
Afterwards, steel sheet pile is pulled out；
(2) crown beam position soil cement is abolished and crown beam periphery earth excavation: after the completion of steel sheet pile construction, abolishing crown beam position immediately
The earthwork on the inside of soil cement and excavation pit within the scope of 10 ~ 15m, absolute altitude are excavated to crown beam bottom, inwardly slope, on the outside of crown beam
Bright gutter is arranged in side 5m；And be arranged in crown beam bottom and tiltedly throw support bracket, the oblique throwing support is in this step without excavating, wait prop up
Secondary construction is carried out after the completion of support；
(3) crown beam and retaining wall construction: in the higher situation of level of ground water, steel sheet pile mainly plays earth-retaining, steel sheet pile gap
There are drift sand situations；Construction personnel, material in this construction procedure and face electricity construction element and make adequate preparation in advance, has construction
It after condition, constructs immediately, construction segmentation carries out, every segment length 40m, reduces the shadow that drift sand constructs to crown beam and retaining wall
It rings；
Crown beam pours in two times with retaining wall concrete, first pours crown beam, the processing of intersection dabbing；To retaining wall concrete strength
After reaching 70%, steel sheet pile is extracted, after steel sheet pile is extracted, carries out graded sand and stone backfill, base of constructing after backfill to position soil layer is extracted
Cheat perimeter gutter and hardening；
It throws in the support bracket position reserved steel bar insertion soil body in crown beam work progress oblique, before concreting process, is tiltedly throwing
Bracket position is supportted, is stayed every 0.5m in crown beam and sets the pre-buried pvc pipe of a DN100, the pre-buried pvc pipe, which extends to, tiltedly throws support ox
Leg position；
Install steel purlin: before installation steel purlin, backfill after first fluting installation steel shelf bracket, steel purlin is combined as with template
Crown beam template, it is whole with crown beam formation one after concreting with reinforcement welding when steel purlin connect bolt installation with crown beam
Body；
(4) concrete tiltedly throws support bracket construction under crown beam: after the completion of support, support bracket position part is tiltedly thrown to concrete under crown beam
It unloads soil and throws support bracket bottom -500mm to oblique, dabbing is carried out to the concrete at interface, rebar surface is cleaned out, mechanical splice
Reinforcing bar is connected, built-in fitting is installed, scaffold fixed form is set up, by pre-buried pvc pipe casting concrete, concrete is using micro- swollen
Swollen concreting after the completion of the concrete setting for tiltedly throwing support, is removed scaffold fixed form and is completed to pre-buried pvc pipe tube top
Close on rivers foundation pit support construction.
Preferably, in the step (1), pearl cotton, extruded sheet or sheathing piece are used between crown beam, retaining wall and steel sheet pile
It is isolated, reduces influence of the pile pulling in the process to retaining wall.
Preferably, in the step (4), the oblique preparatory embedded bar in both ends and straight thread I grades reserved for throwing support
Connector.
The utility model has the advantages that (1) construction method of the present invention is in the construction process, can be solved by the way that steel sheet pile is arranged in advance
Foundation pit sideline and red line apart from it is short can not slope, situations such as soil body collapses, leakage, impeded drainage causes what supporting can not construct to ask
Topic, greatly improves working efficiency, shortens the construction period.
(2) construction method of the present invention supports oblique throwing and is configured pre-buried pvc pipe and its before carrying out oblique throwing support construction
Both ends carry out embedded bar, then the later period pour by pre-buried pvc pipe the concrete for tiltedly throwing support, this construction method is fast square
Just, the speed of application for tiltedly throwing support can be accelerated, the present invention can be effectively to closing on the plentiful Soft Deep Foundation Pit of rivers or water source
Supporting is constructed, meanwhile, foundation pit risk is reduced, evades phenomenon of doing over again, improve supporting construction quality, certain safety is brought to protect
Card and economic benefit.
Detailed description of the invention
Fig. 1 is the supporting construction schematic diagram of construction method of the present invention；
Fig. 2 is the oblique position view for throwing support and pre-buried pvc pipe of the present invention.
In figure, 1- steel sheet pile, 2- crown beam, 3- retaining wall, the pre-buried pvc pipe of 4-, 5- embedded bar, 6- steel purlin, 7- tiltedly thrown
Support.
Specific embodiment
Technical solution of the present invention is described in detail below by attached drawing, but protection scope of the present invention is not limited to
The embodiment.
Embodiment: one kind closing on rivers base pit stand construction, comprising the following steps:
(1) construction of steel sheet pile 1: cause crown beam 2 that can not construct with retaining wall 3 to solve the drift sand in the case of rivers high water level
The problem of, prevention drift sand is carried out using steel sheet pile 1, steel sheet pile 1 uses 28a channel steel, and length 6m, steel sheet pile 1 is away from concrete earth-retaining
Wall 3300mm, steel sheet pile 1 are inserted into stake position using manipulator, complete in crown beam 2 and the construction of retaining wall 3,3 intensity of concrete retaining wall
After reaching 70%, steel sheet pile 1 is pulled out；
(2) 2 position soil cement of crown beam is abolished and 2 periphery earth excavation of crown beam: after the completion of steel sheet pile 1 is constructed, abolishing crown beam 2 immediately
The earthwork on the inside of position soil cement and excavation pit within the scope of 10 ~ 15m, absolute altitude are excavated to 2 bottom of crown beam, and slope, is being preced with inwardly
Bright gutter is arranged in 2 outer side edges 5m of beam；And be arranged in 2 bottom of crown beam and tiltedly throw 7 brackets of support, oblique throwings support 7 in this step not into
Row excavates, and secondary construction is carried out after the completion of to be supported；
(3) crown beam 2 and retaining wall 3 are constructed: in the higher situation of level of ground water, steel sheet pile 1 mainly plays earth-retaining, steel sheet pile 1
There are drift sand situations in gap；Construction personnel, material in this construction procedure and face electricity construction element and make adequate preparation in advance, has
It after execution conditions, constructs immediately, construction segmentation carries out, every segment length 40m, reduces drift sand and constructs to crown beam 2 and retaining wall 3
Influence；
It is isolated between crown beam 2, retaining wall 3 and steel sheet pile 1 using pearl cotton, extruded sheet or sheathing piece, reduces pile pulling process
In influence to retaining wall 3, crown beam 2 pours in two times with 3 concrete of retaining wall, first pours crown beam 2, the processing of intersection dabbing；
After 3 concrete strength of retaining wall reaches 70%, steel sheet pile 1 is extracted, after steel sheet pile 1 is extracted, carries out gradation to position soil layer is extracted
Sandstone backfill, construction foundation pit perimeter gutter and hardening after backfill；
It is thrown in the support 7 bracket position reserved steel bars insertion soil body in 2 work progress of crown beam oblique, before concreting process, oblique
7 bracket positions of support are thrown, is stayed every 0.5m in crown beam 2 and sets the pre-buried pvc pipe 4 of a DN100, the pre-buried pvc pipe 4 extends to tiltedly
Throw 7 bracket positions of support；
Install steel purlin 6: before installation steel purlin 6, backfill after first fluting installation steel shelf bracket, steel purlin 6 is in conjunction with template
As 2 template of crown beam, when steel purlin 6 connect bolt installation with crown beam 2, with reinforcement welding, formed after concreting with crown beam 2
One entirety；
(4) the lower concrete of crown beam 2 tiltedly throws support 7 brackets construction: after the completion of support, tiltedly throwing 7 bracket positions of support to the lower concrete of crown beam 2
Part unloads soil and throws 7 bracket bottom -500mm of support to oblique, carries out dabbing to the concrete at interface, rebar surface is cleaned out, machine
Tool connector connects reinforcing bar, installs built-in fitting, sets up scaffold fixed form, the oblique preparatory embedded bar 5 in both ends for throwing support 7
And reserved straight thread I grades of connectors, by pre-buried 4 casting concrete of pvc pipe, concrete is poured using slightly expanded concrete to pre-
4 tube top of pvc pipe is buried, after the completion of the concrete setting for tiltedly throwing support 7, scaffold fixed form is removed and completes and close on rivers foundation pit
Supporting construction.
As described above, must not be explained although the present invention has been indicated and described referring to specific preferred embodiment
For the limitation to invention itself.It without prejudice to the spirit and scope of the invention as defined in the appended claims, can be right
Various changes can be made in the form and details for it.
Claims (3)
1. one kind closes on rivers base pit stand construction, which comprises the following steps:
(1) construction of steel sheet pile: cause crown beam and retaining wall that can not construct to solve the drift sand in the case of rivers high water level
Problem carries out prevention drift sand using steel sheet pile, and steel sheet pile uses 28a channel steel, and length 6m, steel sheet pile is away from concrete retaining wall
300mm, steel sheet pile are inserted into stake position using manipulator, complete in crown beam and retaining wall construction, concrete retaining wall intensity reaches 70%
Afterwards, steel sheet pile is pulled out；
(2) crown beam position soil cement is abolished and crown beam periphery earth excavation: after the completion of steel sheet pile construction, abolishing crown beam position immediately
The earthwork on the inside of soil cement and excavation pit within the scope of 10 ~ 15m, absolute altitude are excavated to crown beam bottom, inwardly slope, on the outside of crown beam
Bright gutter is arranged in side 5m；And be arranged in crown beam bottom and tiltedly throw support bracket, the oblique throwing support is in this step without excavating, wait prop up
Secondary construction is carried out after the completion of support；
(3) crown beam and retaining wall construction: in the higher situation of level of ground water, steel sheet pile mainly plays earth-retaining, steel sheet pile gap
There are drift sand situations；Construction personnel, material in this construction procedure and face electricity construction element and make adequate preparation in advance, has construction
It after condition, constructs immediately, construction segmentation carries out, every segment length 40m, reduces the shadow that drift sand constructs to crown beam and retaining wall
It rings；
Crown beam pours in two times with retaining wall concrete, first pours crown beam, the processing of intersection dabbing；To retaining wall concrete strength
After reaching 70%, steel sheet pile is extracted, after steel sheet pile is extracted, carries out graded sand and stone backfill, base of constructing after backfill to position soil layer is extracted
Cheat perimeter gutter and hardening；
It throws in the support bracket position reserved steel bar insertion soil body in crown beam work progress oblique, before concreting process, is tiltedly throwing
Bracket position is supportted, is stayed every 0.5m in crown beam and sets the pre-buried pvc pipe of a DN100, the pre-buried pvc pipe, which extends to, tiltedly throws support ox
Leg position；
Install steel purlin: before installation steel purlin, backfill after first fluting installation steel shelf bracket, steel purlin is combined as with template
Crown beam template, it is whole with crown beam formation one after concreting with reinforcement welding when steel purlin connect bolt installation with crown beam
Body；
(4) concrete tiltedly throws support bracket construction under crown beam: after the completion of support, support bracket position part is tiltedly thrown to concrete under crown beam
It unloads soil and throws support bracket bottom -500mm to oblique, dabbing is carried out to the concrete at interface, rebar surface is cleaned out, mechanical splice
Reinforcing bar is connected, built-in fitting is installed, scaffold fixed form is set up, by pre-buried pvc pipe casting concrete, concrete is using micro- swollen
Swollen concreting after the completion of the concrete setting for tiltedly throwing support, is removed scaffold fixed form and is completed to pre-buried pvc pipe tube top
Close on rivers foundation pit support construction.
2. one kind according to claim 1 closes on rivers base pit stand construction, which is characterized in that the step (1)
In, it is isolated between crown beam, retaining wall and steel sheet pile using pearl cotton, extruded sheet or sheathing piece, it is right during reduction pile pulling
The influence of retaining wall.
3. one kind according to claim 1 closes on rivers base pit stand construction, which is characterized in that the step (4)
In, the oblique preparatory embedded bar in both ends and reserved straight thread I grades of connectors for throwing support.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910419699.8A CN110117959B (en) | 2019-05-20 | 2019-05-20 | Construction method for foundation pit support near river |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910419699.8A CN110117959B (en) | 2019-05-20 | 2019-05-20 | Construction method for foundation pit support near river |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110117959A true CN110117959A (en) | 2019-08-13 |
| CN110117959B CN110117959B (en) | 2020-11-03 |
Family
ID=67522853
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910419699.8A Active CN110117959B (en) | 2019-05-20 | 2019-05-20 | Construction method for foundation pit support near river |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110117959B (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115125963A (en) * | 2022-06-24 | 2022-09-30 | 中建八局南方建设有限公司 | Enclosure structure for soft soil foundation and construction method thereof |
| CN115217162A (en) * | 2022-08-22 | 2022-10-21 | 北京建工集团有限责任公司 | Protection structure of foundation pit excavation pipeline and construction method thereof |
| CN116122299A (en) * | 2023-01-03 | 2023-05-16 | 中国十九冶集团有限公司 | A support system and construction method for large and small foundation pits in basements |
| CN116122303A (en) * | 2023-03-15 | 2023-05-16 | 中国建筑第八工程局有限公司 | Bracket structure for replacing support in large-scale group pit construction and construction method thereof |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101420374B1 (en) * | 2013-06-26 | 2014-07-16 | 부산교통공사 | Bracket |
| CN105756091A (en) * | 2016-03-16 | 2016-07-13 | 山东理工大学 | Metro station foundation pit construction method for controlling deformation of neighboring buildings |
| CN208088281U (en) * | 2018-03-13 | 2018-11-13 | 中铁第四勘察设计院集团有限公司 | One kind being used for deep sandy soil deep pit digging structure |
-
2019
- 2019-05-20 CN CN201910419699.8A patent/CN110117959B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101420374B1 (en) * | 2013-06-26 | 2014-07-16 | 부산교통공사 | Bracket |
| CN105756091A (en) * | 2016-03-16 | 2016-07-13 | 山东理工大学 | Metro station foundation pit construction method for controlling deformation of neighboring buildings |
| CN208088281U (en) * | 2018-03-13 | 2018-11-13 | 中铁第四勘察设计院集团有限公司 | One kind being used for deep sandy soil deep pit digging structure |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115125963A (en) * | 2022-06-24 | 2022-09-30 | 中建八局南方建设有限公司 | Enclosure structure for soft soil foundation and construction method thereof |
| CN115217162A (en) * | 2022-08-22 | 2022-10-21 | 北京建工集团有限责任公司 | Protection structure of foundation pit excavation pipeline and construction method thereof |
| CN115217162B (en) * | 2022-08-22 | 2023-04-28 | 北京建工集团有限责任公司 | Protection structure of foundation pit excavation pipeline and construction method thereof |
| CN116122299A (en) * | 2023-01-03 | 2023-05-16 | 中国十九冶集团有限公司 | A support system and construction method for large and small foundation pits in basements |
| CN116122303A (en) * | 2023-03-15 | 2023-05-16 | 中国建筑第八工程局有限公司 | Bracket structure for replacing support in large-scale group pit construction and construction method thereof |
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| Publication number | Publication date |
|---|---|
| CN110117959B (en) | 2020-11-03 |
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