CN109778867A - A kind of self-supporting Composite Enclosure Structure and its construction method - Google Patents
A kind of self-supporting Composite Enclosure Structure and its construction method Download PDFInfo
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Abstract
A kind of self-supporting Composite Enclosure Structure of the invention and its construction method have that displacement deformation is bigger than normal, space occupied is wider and support system influences efficiency of being unearthed existing pattern of going along with sb. to guard him.It includes: Cement-soil Gravity enclosure wall, is made of multiple rows of grill-shaped cement mixing method；Multiple rigid members are arranged at intervals at and meet pitted surface and meet at least two rows of cement mixing methods in native face；Top beam, be set at the top of rigid member and with the cover board of Cement-soil Gravity enclosure wall is whole pours, and the linking beam being arranged at intervals between top beam.Construction method: in foundation pit surrounding construction Cement-soil Gravity enclosure wall, rigid member is beaten along the centreline space spacer for meeting pitted surface and at least two rows of cement mixing methods for meeting native face；Pour top beam at the top of rigid member, between two top beams interval setting linking beam and with cover board is whole pours；Rigid member is pulled out after the completion of construction, it is closely knit using compaction grouting or plain earthen backfill to pull out gap.
Description
Technical field
The present invention relates to geotechnical engineering design and technical field of construction, in particular to a kind of self-supporting Composite Enclosure Structure and
Its construction method.
Background technique
Cement-soil Gravity enclosure wall (gravity dam) system is formed with certain thickness after reinforcing by curing agent to the soil body
With the gravity wall of building-in depth, water after wall, soil pressure can be born and have both water proof effect.Cement-soil Gravity enclosure wall is nothing
Self-supporting soil-baffling structure is supported, since foundation pit inside is open, has the advantages that cost is relatively low and construction is convenient, while there is also positions
It moves and deforms the bigger than normal and wider disadvantage of dam body space occupied, the base pit engineering of 7m is usually no more than suitable for cutting depth, but adjacent
It is used with caution when closely to the buildings or structures of deformation sensitive.
Fashioned iron Soil-cement Wall (SMW engineering method) is a kind of to be inserted into H-type in the triaxial cement mixing pile being continuously socketed
The compound earth-retaining that steel is formed intercepts water structure.This structure has given full play to the mechanical characteristic of soil cement mixture and fashioned iron, and H-type
Steel recoverable has many advantages, such as good Deformation control ability, short time limit, intercepting water property of height, applicable depth small to surrounding environment influence
It spends up to 15m；But it need to be used in conjunction in conjunction with support system, influence the unearthed efficiency of foundation pit, when foundation pit area reaches certain scale,
Largely the setting and dismounting of temporary supports are not only constructed cumbersome, but also project cost greatly increases.
Currently, with the extension of China city depth and the underground space, the scale of foundation pit is increasing, digs deeply increasingly
Also more sophisticated is sensitive for deep, periphery environment, therefore, based on above-mentioned existing the characteristics of going along with sb. to guard him pattern, maximizes favourable factors and minimizes unfavourable ones, carries out novel
The research and development of enclosing Technique have important practical significance.
Summary of the invention
Pattern is gone along with sb. to guard him there are displacement deformations that bigger than normal, dam body space occupied is wider and support system influences to be unearthed for existing
The problem of efficiency.The object of the present invention is to provide a kind of self-supporting Composite Enclosure Structure and its construction methods, in soil cement gravity
Increase gantry type stress system in formula enclosure wall, complex stiffness is big, deformation control effect is good, and occupied area is small, construct it is convenient, can
Strong operability, and the use of inner support system has been reduced or remitted, improve the convenience and economy of foundation pit construction.
The technical solution adopted by the present invention to solve the technical problems is: a kind of self-supporting Composite Enclosure Structure, comprising: water
Soil gravity type enclosure wall is made of, wherein meeting pitted surface the cement mixing method for the multiple rows of grill-shaped being arranged along foundation pit surrounding
At least two rows of parallel cement mixing methods are respectively provided with native face is met, with arranging between the adjacent cement mixing method and phase
It is mutually engaged, is met between pitted surface and at least two rows of cement mixing methods for meeting native face between adjacent two rows of cement mixing methods
Multiple mixing pile column are arranged in longitudinal gap, and the mixing pile is arranged by multiple cement mixing method groups being laterally mutually twisted
At meeting pitted surface for connecting and meet described in native face at least two rows of cement mixing methods；
Multiple rigid members, longitudinal direction and are arranged at intervals at meeting for the Cement-soil Gravity enclosure wall and pitted surface and meet native face
In at least two rows of cement mixing methods, and in the center of the rigid member and at least two rows of cement mixing methods
The heart is overlapped；
Top beam, be set at the top of the rigid member and with the cover board of the Cement-soil Gravity enclosure wall is whole pours, with
And；
Linking beam in parallel and is arranged at intervals between two adjacent top beams.
Preferably, the rigid member is reinforced concrete sheet pile or fashioned iron, the cross section of the reinforced concrete sheet pile
For I-shaped, rectangle, cross or round.
Preferably, the clear distance D at the rigid member and Cement-soil Gravity enclosure wall edge is not less than 200mm.
Preferably, the Cement-soil Gravity enclosure wall meets pitted surface and meets at least two rows of cement mixing methods in native face
Interior rigid member position is corresponding or is staggered, the linking beam with meet pitted surface or/and meet the described at least two rows of of native face
The center of rigid member in cement mixing method is corresponding.
Preferably, the cross section of the reinforced concrete sheet pile is in I-shaped, is internally provided with multiple longitudinally through notes
Hole is starched, is connected between the two neighboring injected hole by the water passage of multiple horizontal distributions, and each injected hole is logical
The horizontal channel for crossing multiple horizontal distributions is connected to outside.
Preferably, one or more combinations of reinforcing bar, steel pipe, moso bamboo are set in the mixing pile column.
In addition, steps are as follows the present invention also provides a kind of construction method of self-supporting Composite Enclosure Structure:
S1: foundation pit surrounding construct multiple rows of grill-shaped cement mixing method formed Cement-soil Gravity enclosure wall, wherein
Meet pitted surface with meet native face and construct respectively at least two rows of parallel cement mixing methods, with arrange the adjacent cement mixing method it
Between and the adjacent two rows cement mixing method between be mutually engaged, meeting pitted surface and meeting described in native face at least two drainings
Multiple mixing pile column are arranged in interval between soil mixing pile, and the mixing pile is arranged by multiple soil cements being laterally mutually twisted
Mixing pile composition；
S2: rigid member is beaten along the centreline space spacer for meeting pitted surface and at least two rows of cement mixing methods for meeting native face；
S3: pouring top beam at the top of the rigid member, and linking beam, and institute are poured between the two neighboring top beam
The cover board for stating top beam and the Cement-soil Gravity enclosure wall whole pours；
S4: after the completion of foundation pit construction, pulling out the rigid member, and it is close using compaction grouting or plain earthen backfill to pull out gap
It is real.
Preferably, in the step S2, after at least two rows of cement-soil stirring pile constructions in 7 days, described at least two
It is covered in row's cement mixing method using the jump mode of beating and beats the construction rigid member, and the construction of adjacent two rigid members
Interval no less than 2 days.
Preferably, in the step S2, the rigid member uses cross section for I-shaped, rectangle, cross or round
Reinforced concrete sheet pile, wherein the cross section of the reinforced concrete sheet pile in it is I-shaped when, be internally provided with multiple longitudinal directions
The injected hole of perforation is connected between the two neighboring injected hole by the water passage of multiple horizontal distributions, and each described
Injected hole is connected to by the horizontal channel of multiple horizontal distributions with outside；In the step S4, after the completion of foundation pit construction, from described
Injected hole injects high pressure water flow splitting and separates the reinforced concrete sheet pile and the Cement-soil Gravity enclosure wall.
Preferably, in the step S2, the rigid member uses fashioned iron, in fashioned iron insertion at least two draining
Before soil mixing pile, the preparatory brushing antifriction material in fashioned iron surface；In the step S4, after the completion of foundation pit construction, pull out
The fashioned iron.
Effect of the invention is that:
Self-supporting Composite Enclosure Structure of the invention, including being arranged along foundation pit surrounding and being stirred by the soil cement of multiple rows of grill-shaped
The Cement-soil Gravity enclosure wall for mixing stake composition is flat in at least two rows of Cement-soil Gravity enclosure wall met pitted surface and meet native face
The spaced multiple rigid members in the center of capable cement mixing method are set to rigid member top and and soil cement
The whole top beam poured of the cover board of gravity type enclosure wall, and it is parallel and be arranged at intervals at linking between two neighboring top beam
Beam, Cement-soil Gravity enclosure wall, rigid member, top beam and linking beam collectively form the gantry type beaer of complex stiffness
System, the self-supporting Composite Enclosure Structure have given full play to the mechanical property of material, and complex stiffness is big, deformation control effect is good, accounts for
Ground area is small, has accomplished the reasonable disposition of resource；Self-supporting Composite Enclosure Structure is safe and reliable, convenient, strong operability of constructing；
Self-supporting Composite Enclosure Structure has reduced or remitted the use of inner support system, improves the convenience and economy of foundation pit construction；In base
After the construction of hole, interpolation rigid member can extract recycling, reduce construction cost.
The construction method of self-supporting Composite Enclosure Structure of the invention, firstly, constructing multiple rows of grill-shaped in foundation pit surrounding
Cement mixing method forms Cement-soil Gravity enclosure wall, in meeting pitted surface and at least two rows of cement mixing methods for meeting native face
Heart location interval set beats rigid member, and top beam is poured at the top of rigid member, pours linking beam between two neighboring top beam,
And top beam and Cement-soil Gravity enclosure wall cover board it is whole pour, after conserving up to age, Cement-soil Gravity enclosure wall, rigidity
Component, top beam and linking beam collectively form the gantry type stress system of complex stiffness, the construction method strong operability, convenient
Fast；The mechanical property of material is given full play to, complex stiffness is big, deformation control effect is good, and occupied area is small, has accomplished resource
Reasonable disposition；The use for having reduced or remitted inner support system improves the convenience and economy of foundation pit construction；It is complete in foundation pit construction
Bi Hou, interpolation rigid member can extract recycling, further embody the economy of technique, present invention is particularly suitable for
Medium digging is deep and has certain base pit engineering for controlling and requiring to deformation is gone along with sb. to guard him.
Detailed description of the invention
Fig. 1 is the sectional view of one embodiment of self-supporting Composite Enclosure Structure of the invention；
Fig. 2 is the plan view of one embodiment of self-supporting Composite Enclosure Structure of the invention；
Fig. 3 is the connection relationship of top beam and linking beam signal in one embodiment of self-supporting Composite Enclosure Structure of the invention
Figure；
Fig. 4 is the knot of the water passage of reinforced concrete sheet pile in one embodiment of self-supporting Composite Enclosure Structure of the invention
Structure schematic diagram；
Fig. 5 is the A-A sectional view of Fig. 4.
Figure label is as follows:
Basement structure 1；Self-supporting Composite Enclosure Structure 10；Cement-soil Gravity enclosure wall 11；Cement mixing method
11a；Mixing pile column 11b；Rigid member 12；Injected hole 12a；Horizontal channel 12b；Top beam 14；Linking beam 15；Cover board 16；Steel
Muscle 17；Steel pipe 18.
Specific embodiment
The present invention is described in further detail below in conjunction with the drawings and specific embodiments.It should be noted that attached drawing is adopted
With very simplified form and using non-accurate ratio, only to facilitate, lucidly aid in illustrating the embodiment of the present invention
Purpose.For sake of convenience, "upper" described below, "lower" are consistent with the upper and lower direction of attached drawing, but this can't be this hair
The limitation of bright technical solution.
The foundation depth of the present embodiment about 5m moves back boundary apart from limited because of main structure and land red-line, causes to go along with sb. to guard him knot
Structure construction site is limited, the Cement-soil Gravity enclosure wall 11 for enough width that is not enough to construct, therefore uses in Cement-soil Gravity
The technical solution for increasing the foundation pit Composite Enclosure Structure of gantry type stress system in enclosure wall 11, illustrates below with reference to Fig. 1 to Fig. 5
Self-supporting Composite Enclosure Structure 10 of the invention, it includes:
Cement-soil Gravity enclosure wall 11, by the cement mixing method 11a group for the multiple rows of grill-shaped being arranged along foundation pit surrounding
At, wherein the present embodiment Cement-soil Gravity enclosure wall 11 meet pitted surface with native face is met that inside and outside two rows are laterally arranged is parallel
Cement mixing method 11a (being interior close to foundation pit side, be outer far from foundation pit side), the adjacent cement mixing method 11a with row
Between and adjacent two rows of cement mixing method 11a between be mutually engaged, meet pitted surface and meet two rows of parallel cement in native face
Multiple mixing pile column 11b are arranged in longitudinal gap between native mixing pile 11a, and mixing pile column 11b is by multiple water being laterally mutually twisted
Soil mixing pile 11a composition, for connecting the two rows of cement mixing method 11a for meeting pitted surface and meeting native face；
Multiple rigid members 12, longitudinal direction and are arranged at intervals at meeting for Cement-soil Gravity enclosure wall 11 and pitted surface and meet native face
In two rows of cement mixing method 11a, and the center of rigid member 12 is overlapped with the center of two rows of cement mixing method 11a；
Top beam 14, be set to the top of rigid member 12 and with the cover board of Cement-soil Gravity enclosure wall 11 16 is whole pours, with
And；
Linking beam 15 in parallel and is arranged at intervals between two adjacent top beams 14.
The form of above-mentioned cement mixing method 11a can be for single shaft, twin shaft, three axis, five axis etc., the content of the present embodiment and attached
For figure by taking more typical dual spindle soil-cement mixing pile as an example, Cement-soil Gravity enclosure wall 11 uses the twin shaft water of 700@500 of φ
Soil mixing pile construction, fender body wide 3.7m, embedded depth 6m, the mixing pile ratio of mud 0.6, cement mixing content 15%, soil cement weight
The cover board 16 of 200mm thickness pea gravel concreten arrangement of reinforcement, the top beam being arranged at the top of rigid member 12 are set at the top of power formula enclosure wall 11
14 sectional dimension 1000mm × 700mm (long × wide), sectional dimension 700mm × 600mm (long × wide) of linking beam 15.
Self-supporting Composite Enclosure Structure 10 of the invention, including being arranged along foundation pit surrounding and by the soil cement of multiple rows of grill-shaped
The Cement-soil Gravity enclosure wall 11 of mixing pile 11a composition, meeting pitted surface and meet native face in Cement-soil Gravity enclosure wall 11
The spaced multiple rigid members 12 in center of at least two rows of parallel cement mixing method 11a, are set to rigid structure
The top of part 12 and with the whole top beam 14 poured of the cover board of Cement-soil Gravity enclosure wall 11 16, and it is parallel and be arranged at intervals at phase
Linking beam 15 between adjacent two top beams 14, Cement-soil Gravity enclosure wall 11, rigid member 12, top beam 14 and linking beam
15 collectively form the gantry type stress system of complex stiffness, which has given full play to the mechanics of material
Performance, complex stiffness is big, deformation control effect is good, and occupied area is small, has accomplished the reasonable disposition of resource；Self-supporting is compound to go along with sb. to guard him
Structure 10 is safe and reliable, convenient, strong operability of constructing；Self-supporting Composite Enclosure Structure 10 has reduced or remitted making for inner support system
With improving the convenience and economy of foundation pit construction；After foundation pit construction, interpolation rigid member 12 can extract recycling and follow
Ring uses, and reduces construction cost.
Above-mentioned rigid member 12 is reinforced concrete sheet pile or fashioned iron, to improve at least two drainings met pitted surface and meet native face
The lateral pressure resistant ability of soil mixing pile 11a, wherein the cross section of reinforced concrete sheet pile be I-shaped, rectangle, it is cross or circle
Shape controls with specific reference to building enclosure stress deformation and requires to determine.
As shown in Fig. 2, to guarantee water proof effect, the clear distance D of rigid member 12 and 11 edge of Cement-soil Gravity enclosure wall
Not less than 200mm.
Rigidity in at least two rows cement mixing method 11a for meeting pitted surface and meeting native face of Cement-soil Gravity enclosure wall 11
12 position of component is corresponding or is staggered, the situation being staggered described in Fig. 2 for rigid member 12, linking beam 15 and meets pitted surface
Or/and meet rigid member 12 at least two rows of cement mixing method 11a in native face center it is corresponding, advantageously form stabilization
Gantry type stress system, improve the entire compression ability of building enclosure.
Gap caused by above-mentioned rigid member 12 is pulled out afterwards is closely knit using compaction grouting or plain earthen backfill.
Above-mentioned fashioned iron, in fashioned iron external coating antifriction material, is convenient for before at least two rows of cement mixing method 11a of insertion
Later period extracts recycling and recycles.
As shown in Figure 4 and Figure 5, the cross section of the reinforced concrete sheet pile of the present embodiment is in I-shaped, is internally provided with more
It is connected between a longitudinally through injected hole 12a, two neighboring injected hole 12a by the water passage of multiple horizontal distributions, and
Each injected hole 12a is connected to by the horizontal channel 12b of multiple horizontal distributions with outside.Using high pressure water injection mode, high pressure water
Flow through injected hole 12a and water passage, by multiple horizontal channel 12b outflow high pressure water can by 17 concrete sheet-piling of reinforcing bar with
Double Double shaft stirring stake splitting separation, pulls out construction convenient for 17 concrete sheet-piling of reinforcing bar, more preferably, water passage connects with outside
Logical hole surface coating closing, avoids hole from blocking.
As shown in Fig. 2, longitudinal and spaced mixing pile column 11b in setting reinforcing bar 17, steel pipe 18, moso bamboo one kind or
A variety of combination, to reinforce the structural strength of mixing pile column 11b, in addition, adjacent two at least two rows of cement mixing method 11a
It may also set up one or more combinations of reinforcing bar 17, steel pipe 18, moso bamboo between root rigid member 12.
Illustrate the construction method of self-supporting Composite Enclosure Structure of the invention below with reference to Fig. 1 to Fig. 5, specific steps are such as
Under:
S1: foundation pit surrounding construct multiple rows of grill-shaped cement mixing method 11a formed Cement-soil Gravity enclosure wall 11,
Wherein, meet pitted surface with meet native face and construct respectively at least two rows of parallel cement mixing method 11a, with arranging adjacent Soil-cement
It is mutually engaged between stake 11a and between adjacent two rows of cement mixing method 11a, is meeting pitted surface and meeting at least two rows of of native face
Multiple mixing pile column 11b are arranged in interval between parallel cement mixing method 11a, and mixing pile column 11b is mutually stung by multiple transverse directions
The cement mixing method 11a of conjunction is formed；
S2: rigid member is beaten along the centreline space spacer for meeting pitted surface and at least two rows of cement mixing method 11a for meeting native face
12；
S3: pouring top beam 14 at the top of rigid member 12, linking beam 15 is poured between two neighboring top beam 14, and push up
The cover board 16 of collar tie beam 14 and Cement-soil Gravity enclosure wall 11 is whole to be poured；
S4: after the completion of foundation pit construction, pulling out rigid member 12, and it is closely knit using compaction grouting or plain earthen backfill to pull out gap.
The construction method of self-supporting Composite Enclosure Structure of the invention, firstly, constructing multiple rows of grill-shaped in foundation pit surrounding
Cement mixing method 11a forms Cement-soil Gravity enclosure wall 11, is meeting pitted surface and is meeting at least two rows of Soil-cements in native face
The center spacer sleeve of stake 11a beats rigid member 12, and top beam 14, two neighboring top beam are poured at the top of rigid member 12
Pour linking beam 15 between 14, and top beam 14 and Cement-soil Gravity enclosure wall 11 cover board 16 it is whole pour, reach age in maintenance
Afterwards, Cement-soil Gravity enclosure wall 11, rigid member 12, top beam 14 and linking beam 15 collectively form the gantry type of complex stiffness
Stress system, the construction method strong operability are convenient and efficient；The mechanical property of material is given full play to, complex stiffness is big, becomes
Shape control effect is good, and occupied area is small, has accomplished the reasonable disposition of resource；The use for having reduced or remitted inner support system, improves base
Cheat the convenience and economy of construction；After foundation pit construction, interpolation rigid member 12 can extract recycling, into one
Step embodies the economy of technique, deep present invention is particularly suitable for medium digging and to the base gone along with sb. to guard him deformation and have certain control to require
Cheat engineering.
In step S2, after at least two rows cement mixing method 11a construction in 7 days, at least two rows of cement mixing method 11a
Inner sleeve beats rigid member 12, is covered when set beats rigid member 12 using the jump mode of beating and plays construction, and the construction of adjacent rigid elements 12
Interval preferably greater than 2 days, the spacing of two neighboring rigid member 12 according to rigidity it needs to be determined that, adjacent two rigidity in the present embodiment
The interval of component 12 is less than or equal to 2m, avoids at least two rows cement mixing method 11a from being in bending stress state, prevents curved
Song destroys.
In step S2, rigid member 12 uses cross section for I-shaped, rectangle, cross or circular armoured concrete slab
Stake, the present embodiment advantageous cross sections be in I-shaped reinforced concrete sheet pile, cross sectional dimensions 700mm × 400mm, web and
Wing plate thickness is 100mm, the long 12m of stake, 14 sectional dimension 1000mm × 700mm of top beam that reinforced concrete sheet pile top is arranged
(long × wide), sectional dimension 600mm × 700mm (long × wide) of linking beam 15, after excavation, reinforced concrete sheet pile and soil cement
Gravity type enclosure wall 11 and cover board 16 is whole pours is equipped with multiple longitudinally through injected hole 12a inside reinforced concrete sheet pile, adjacent
It is connected between two injected hole 12a by the water passage of multiple horizontal distributions, and each injected hole 12a passes through multiple horizontal points
The horizontal channel 12b of cloth is connected to outside, after the completion of foundation pit construction, cleaves rebar separator from injected hole 12a injection high pressure water flow
Concrete sheet-piling and Cement-soil Gravity enclosure wall 11 are extracted so as to reinforced concrete sheet pile and are recycled.
In step S2, rigid member 12 uses fashioned iron, before squeezing at least two rows of cement mixing method 11a, fashioned iron table
The preparatory brushing antifriction material in face；In step S4, after the completion of foundation pit construction, fashioned iron is pulled out.
In step S3, at least two rows of cement mixing methods of Cement-soil Gravity enclosure wall 11 met pitted surface and meet native face
12 position of rigid member in 11a is corresponding or is staggered, linking beam 15 with meet pitted surface or/and meet native face at least two draining
The center of rigid member 12 in soil mixing pile 11a is corresponding, advantageously forms stable gantry type stress system, and raising is enclosed
The entire compression ability of protection structure.
Foregoing description is only the description to present pre-ferred embodiments, not to any restriction of the scope of the invention, this hair
Any change, the modification that the those of ordinary skill in bright field does according to the disclosure above content, belong to scope of the claims.
Claims (10)
1. a kind of self-supporting Composite Enclosure Structure characterized by comprising
Cement-soil Gravity enclosure wall is made of the cement mixing method for the multiple rows of grill-shaped being arranged along foundation pit surrounding, wherein
It meets pitted surface and is respectively provided at least two rows of parallel cement mixing methods with native face is met, with row between the adjacent cement mixing method
And it is mutually engaged between the adjacent two rows cement mixing method, meets pitted surface and meets at least two rows of Soil-cements in native face
Multiple mixing pile column are arranged in longitudinal gap between stake, and the mixing pile is arranged by multiple Soil-cements being laterally mutually twisted
Stake composition meets pitted surface for connection and meets at least two rows of cement mixing methods described in native face；
Multiple rigid members, longitudinal direction and are arranged at intervals at meeting for the Cement-soil Gravity enclosure wall and pitted surface and meet the described of native face
In at least two rows of cement mixing methods, and the center weight at the center of the rigid member and at least two rows of cement mixing methods
It closes；
Top beam, be set at the top of the rigid member and with the cover board of the Cement-soil Gravity enclosure wall is whole pours, and；
Linking beam in parallel and is arranged at intervals between two adjacent top beams.
2. self-supporting Composite Enclosure Structure according to claim 1, it is characterised in that: the rigid member is reinforced concrete
Native sheet pile or fashioned iron, the cross section of the reinforced concrete sheet pile is I-shaped, rectangle, cross or round.
3. self-supporting Composite Enclosure Structure according to claim 1, it is characterised in that: the rigid member and the cement
The clear distance D at native gravity type enclosure wall edge is not less than 200mm.
4. self-supporting Composite Enclosure Structure according to claim 1, it is characterised in that: the Cement-soil Gravity enclosure wall
It is corresponding with the rigid member position in at least two rows of cement mixing methods for meeting native face or be staggered to meet pitted surface, it is described
Linking beam is corresponding with meeting pitted surface or/and meeting the center of rigid member at least two rows of cement mixing methods in native face.
5. self-supporting Composite Enclosure Structure according to claim 2, it is characterised in that: the cross of the reinforced concrete sheet pile
Section is internally provided with multiple longitudinally through injected holes, passes through multiple water between the two neighboring injected hole in I-shaped
Divide the water passage connection of cloth equally, and each injected hole is connected to by the horizontal channel of multiple horizontal distributions with outside.
6. self-supporting Composite Enclosure Structure according to claim 1, it is characterised in that: steel is arranged in the mixing pile column
One or more combinations of muscle, steel pipe, moso bamboo.
7. a kind of construction method of self-supporting Composite Enclosure Structure, which is characterized in that steps are as follows:
S1: foundation pit surrounding construct multiple rows of grill-shaped cement mixing method formed Cement-soil Gravity enclosure wall, wherein meet hole
Face with meet native face and construct respectively at least two rows of parallel cement mixing methods, with arrange between the adjacent cement mixing method with
And be mutually engaged between the adjacent two rows cement mixing method, it is meeting pitted surface and is meeting at least two rows of soil cements described in native face
Multiple mixing pile column are arranged in interval between mixing pile, and the mixing pile is arranged by multiple Soil-cements being laterally mutually twisted
Stake composition；
S2: rigid member is beaten along the centreline space spacer for meeting pitted surface and at least two rows of cement mixing methods for meeting native face；
S3: pouring top beam at the top of the rigid member, and linking beam, and the top are poured between the two neighboring top beam
The cover board of collar tie beam and the Cement-soil Gravity enclosure wall is whole to be poured；
S4: after the completion of foundation pit construction, pulling out the rigid member, and it is closely knit using compaction grouting or plain earthen backfill to pull out gap.
8. construction method according to claim 7, it is characterised in that: in the step S2, at least two rows of soil cements
After mixing pile construction in 7 days, is covered at least two rows of cement mixing methods using the jump mode of beating and beat the construction rigid structure
Part, and the construction interval of adjacent two rigid members is no less than 2 days.
9. construction method according to claim 7, it is characterised in that: in the step S2, the rigid member is using horizontal
Section is I-shaped, rectangle, cross or circular reinforced concrete sheet pile, wherein the reinforced concrete sheet pile it is transversal
When face is in I-shaped, multiple longitudinally through injected holes are internally provided with, pass through multiple water between the two neighboring injected hole
Divide the water passage connection of cloth equally, and each injected hole is connected to by the horizontal channel of multiple horizontal distributions with outside；Institute
It states in step S4, after the completion of foundation pit construction, separates the reinforced concrete sheet pile from injected hole injection high pressure water flow splitting
With the Cement-soil Gravity enclosure wall.
10. construction method according to claim 7, it is characterised in that: in the step S2, the rigid member uses type
Steel, before fashioned iron insertion at least two rows of cement mixing methods, the preparatory brushing antifriction material in fashioned iron surface；Institute
It states in step S4, after the completion of foundation pit construction, pulls out the fashioned iron.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110468850A (en) * | 2019-08-29 | 2019-11-19 | 天津大学 | A kind of oblique cement mixing method foundation pit supporting system and method for protecting support |
| CN113389206A (en) * | 2021-07-05 | 2021-09-14 | 中国建筑第八工程局有限公司 | Foundation pit enclosure system and construction method thereof |
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| CN113389206A (en) * | 2021-07-05 | 2021-09-14 | 中国建筑第八工程局有限公司 | Foundation pit enclosure system and construction method thereof |
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