CN108589738A - Half gravity dam formula foundation pit enclosure structure and its construction method - Google Patents
Half gravity dam formula foundation pit enclosure structure and its construction method Download PDFInfo
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- CN108589738A CN108589738A CN201810495315.6A CN201810495315A CN108589738A CN 108589738 A CN108589738 A CN 108589738A CN 201810495315 A CN201810495315 A CN 201810495315A CN 108589738 A CN108589738 A CN 108589738A
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- 230000005484 gravity Effects 0.000 title claims abstract description 39
- 238000010276 construction Methods 0.000 title claims abstract description 13
- 239000002689 soil Substances 0.000 claims description 49
- 238000009412 basement excavation Methods 0.000 claims description 9
- 238000003780 insertion Methods 0.000 claims description 4
- 230000037431 insertion Effects 0.000 claims description 4
- 230000009466 transformation Effects 0.000 abstract description 5
- 238000013461 design Methods 0.000 description 12
- 229910000831 Steel Inorganic materials 0.000 description 6
- 239000010959 steel Substances 0.000 description 6
- 238000007596 consolidation process Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 5
- 230000006641 stabilisation Effects 0.000 description 5
- 238000011105 stabilization Methods 0.000 description 5
- 230000008859 change Effects 0.000 description 4
- 238000001556 precipitation Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 238000004873 anchoring Methods 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 239000004568 cement Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000003014 reinforcing effect Effects 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 230000002776 aggregation Effects 0.000 description 1
- 238000004220 aggregation Methods 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000009435 building construction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 238000012407 engineering method Methods 0.000 description 1
- 238000011065 in-situ storage Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 210000003205 muscle Anatomy 0.000 description 1
- 239000011150 reinforced concrete Substances 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
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- 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
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Abstract
The present invention provides a kind of half gravity dam formula foundation pit enclosure structure and its construction methods,Including more first pile bodies and the second pile body being embedded in foundation pit,More first pile bodies are arranged along the edge interval of foundation pit,More second pile bodies are arranged and correspond in the same direction with more first pile bodies,More first pile bodies,The first Guan Liang and the second Guan Liang are connected separately at the top of second pile body,Campshed is connected between first Guan Liang and the second Guan Liang to bear down on one,It is connected with waist rail in the middle part of more first pile bodies,It is angularly disposed between waist rail and the second Guan Liang to have diagonal brace,Its first end is connected to the second Guan Liang,Its second end is inserted between two adjacent first pile bodies and is connected to the first side of waist rail,The second side of waist rail is equipped with angularly disposed tension member,It is tension member that there is an opposite anchored end and a free end,The second end contraposition setting of free end and diagonal brace tension member.The present invention solves the problems, such as the cooperative transformation energy force difference of existing Single row pillars building enclosure.
Description
Technical field
The present invention relates to technical field of building construction, and in particular to half gravity dam formula foundation pit enclosure structure of one kind and its construction
Method.
Background technology
As urban construction land becomes increasingly tense, the exploitation of the underground space is fast-developing, and base pit engineering excavates also increasingly
Deep, the retaining design formed using Single row pillars and Guan Liang has been widely used in foundation pit construction.However, the system is due to only pushing up
Portion has Guan Liang to connect Single row pillars, and rigidity is small, cooperative transformation energy force difference, and deformation is often larger, close in building and personnel
The city of collection is in use, be unable to reach deep pit monitor and environment deformation requirements.
Invention content
To overcome the defects of present in the prior art, half gravity dam formula foundation pit enclosure structure of one kind and its construction party are now provided
Method, to solve the problems, such as the cooperative transformation energy force difference of existing Single row pillars building enclosure.
To achieve the above object, a kind of half gravity dam formula foundation pit enclosure structure is provided, including is embedded in the soil body on the outside of foundation pit
The second pile body of more first pile bodies and Duo Gen, more first pile bodies along the foundation pit edge interval be arranged, more institutes
It states the second pile body and more first pile body are arranged in the same direction and first pile body is corresponded with second pile body, more
It is connected with the first Guan Liang at the top of first pile body, is connected with the second Guan Liang at the top of more second pile bodies, described
It is connected with campshed between one Guan Liang and second Guan Liang to bear down on one, waist rail is connected in the middle part of more first pile bodies, it is described
Angularly disposed between waist rail and second Guan Liang to have diagonal brace, the first end of the diagonal brace is connected to second Guan Liang, described
The second end of diagonal brace is inserted between first pile body of adjacent two and is connected to the foundation pit side backwards of the waist rail
The second side towards the foundation pit edge of first side on edge, the waist rail is equipped with angularly disposed tension member, the tension
There is part an opposite anchored end and a free end, the free end tension member and the second end contraposition of the diagonal brace to be arranged,
The anchored end tension member is embedded in the soil body on the outside of the foundation pit.
Further, the height of the waist rail to the bottom of foundation ditch is top to the foundation pit bottom of first pile body
The 1/3 of the height in portion.
Further, the waist rail includes the upper beam body being arranged along the edge of the foundation pit and lower beam body, the upper beam body
Be connected to the side close to the foundation pit edge of more first pile bodies with the lower beam body, the upper beam body and it is described under
Connection batten plate is connected between beam body, the end face of the second end of the diagonal brace is connected to the back of the body of the upper beam body and the lower beam body
To first side at the foundation pit edge, the free end tension member be installed on the upper beam body and the lower beam body towards institute
State the second side at foundation pit edge.
Further, described tension member for prestressed anchor or prestress anchorage cable.
Further, the second side of the upper beam body and the lower beam body is connected with anchor plate, is formed on the anchor plate
There are perforation, the free end tension member to be arranged in the perforation, the free end tension member extends to the remote of the anchor plate
From the side of the upper beam body and the lower beam body and it is connected with anchorage, the anchorage is connected to the anchor plate.
Further, the side far from the upper beam body and the lower beam body of the anchor plate has slope, described
Anchorage is connected to the slope, described tension member perpendicular to the slope.
Further, the waist rail is located at the side close to the edge of the foundation pit of more first pile bodies.
The present invention provides a kind of construction method of half gravity dam formula foundation pit enclosure structure, includes the following steps：
More first pile bodies and Duo Gen second are buried along the edge of the foundation pit in the soil body on the outside of the foundation pit not excavated
Body so that more first pile bodies along the setting of the edge interval of the foundation pit, more second pile bodies with more described the
One pile body is arranged in the same direction and first pile body is corresponded with second pile body；
Diagonal brace is provided, by the base of the diagonal brace between adjacent two couple first pile body and second pile body
Oblique insertion in the outside soil body in hole so that the first end of the diagonal brace is located at the top of second pile body, the diagonal brace
Second end is located at the middle part of first pile body；
The outside soil body of the foundation pit is excavated at the top of first pile body described in Yu Duogen and second pile body, in more institutes
It states and pours the first Guan Liang at the top of the first pile body, the second Guan Liang is poured at the top of the second pile body described in Yu Duogen, in described first
Campshed is poured between Guan Liang and second Guan Liang to bear down on one so that the first end of diagonal brace pours in second Guan Liang；
The soil body is to the position of the second end of the diagonal brace on the inside of excavation pit；
Waist rail is provided, the waist rail is connected to the middle part of more first pile bodies, and by the second end of the diagonal brace
It is connected to the first side backwards to the foundation pit edge of the waist rail；
There is provided it is tension member, it is described it is tension member have an opposite anchored end and a free end, by the anchoring tension member
End is embedded on the outside of the foundation pit in the soil body, described tension member in the second side installation towards the foundation pit edge of the waist rail
Free end so that the second end contraposition of the free end tension member and the diagonal brace is arranged.
The beneficial effects of the present invention are half gravity dam formula foundation pit enclosure structure of the present invention passes through in adjacent two couple first
Oblique cutting diagonal brace between pile body and the second pile body, the first end of diagonal brace is cast-in-place in the second Guan Liang, and the steel in the second Guan Liang
Muscle structure connects, and the second end of diagonal brace extends to the outer ledge of the first campshed and waist rail is welded to connect, and enhances the change of retaining design
Shape control ability.Half gravity dam formula foundation pit enclosure structure of the present invention anchors into the tension on the outside of foundation pit in stratum using waist rail as starting point
Part bears down on one with the first campshed, the second campshed, campshed, constitutes a complete coordination together with the first Guan Liang, the second Guan Liang and diagonal brace
The foundation pit system of stress.Half gravity dam formula foundation pit enclosure structure of the present invention double-row pile (the first campshed and the second campshed) it
Between increase diagonal brace and tension member, the compatibility of deformation ability of whole system can be greatly improved.Half gravity dam formula foundation pit of the present invention
On the one hand building enclosure greatly improves the effect of double-row pile (the first campshed and the second campshed) cooperative transformation, improves entire fender body
The compatibility of deformation ability of system；On the other hand, the constraint that retaining design deforms larger position is increased, when greatly reducing excavation of foundation pit
The deformation of building enclosure effectively improves the security performance of foundation pit supporting system.
Description of the drawings
Fig. 1 is the structural schematic diagram of half gravity dam formula foundation pit enclosure structure of the invention.
Fig. 2 is the vertical view of half gravity dam formula foundation pit enclosure structure of the invention.
Fig. 3 is the right view of half gravity dam formula foundation pit enclosure structure of the invention.
Specific implementation mode
Illustrate that embodiments of the present invention, those skilled in the art can be by this specification below by way of specific specific example
Disclosed content understands other advantages and effect of the present invention easily.The present invention can also pass through in addition different specific realities
The mode of applying is embodied or practiced, the various details in this specification can also be based on different viewpoints with application, without departing from
Various modifications or alterations are carried out under the spirit of the present invention.
Fig. 1 is that structural schematic diagram, Fig. 2 of half gravity dam formula foundation pit enclosure structure of the invention are half gravity dam formula base of the invention
Vertical view (not showing tension member), Fig. 3 of pit enclosure structure are the right view of half gravity dam formula foundation pit enclosure structure of the invention.
Shown in Fig. 3, the present invention provides a kind of half gravity dam formula foundation pit enclosure structures, including more first
Pile body 1 and the second pile bodies of Duo Gen 2.
More first pile bodies 1 and the second pile bodies of Duo Gen 2 are embedded in the outside soil body of foundation pit.More first pile bodies 1 are along base
The edge interval in hole is arranged.More second pile bodies 2 and more first pile bodies, 1 settings in the same direction and the first pile body 1 and the second pile body 2 one
One corresponds to.More second pile bodies 2 are set to the side at the edge of the separate foundation pit of more first pile bodies 1.
The top of more first pile bodies 1 is connected with the first Guan Liang 11.The top of more second pile bodies 2 is connected with the second Guan Liang
21.It is connected with campshed between first Guan Liang 11 and the second Guan Liang 21 and bears down on one 3.
First pile body 1 and the second pile body 2 can be the SMW engineering method stakes of interpolation shaped steel, can also be cast-in-situ bored pile.The
One Guan Liang 11, the second Guan Liang 21 and campshed bear down on one 3 as reinforced concrete structure.First Guan Liang and the first pile body are cast-in-place one
It rises, for spaced more first pile bodies to be connected first campshed of formation in a row；Second Guan Liang and the second pile body are cast-in-place
Together, it is used to spaced second pile body connecting second campshed of formation in a row.Campshed bears down on one and the first Guan Liang, second
Guan Liang is cast-in-place to link together, and the elevation of top that campshed bears down on one is consistent.Campshed bears down on one and the first campshed, the second campshed, the first hat
Beam, the second Guan Liang collectively constitute stress system.
The medium position of the side at the close foundation pit edge of more first pile bodies 1 is connected with waist rail 4.Waist rail 4 and second is preced with
It is angularly disposed between beam 21 to have diagonal brace 5.The first end of diagonal brace 5 is connected to the second Guan Liang 21.The second end of diagonal brace 5 is inserted in adjacent
Two first pile bodies 1 between, and the second end of diagonal brace 5 be connected to waist rail 4 backwards to foundation pit edge the first side.Waist rail 4
The second side towards foundation pit edge is equipped with tension member 6.Tension member 6 towards the separate foundation pit edge of more first pile bodies side
It is angularly disposed downwards.
Tension member 6 have an opposite anchored end and a free end.The second end pair of tension member 6 free end and diagonal brace 5
Position setting.Tension member 6 anchored end is embedded in the outside soil body of foundation pit.A is the bottom of foundation pit in Fig. 1.
Diagonal brace, between the first pile body of adjacent two couple of oblique cutting and the second pile body.First Guan Liang is parallel to the second Guan Liang, diagonal brace
Projection perpendicular to the first Guan Liang and the second Guan Liang.Diagonal brace uses steel diagonal brace, and the first end of diagonal brace is cast-in-place in the second Guan Liang, and
Bar construction connection in the second Guan Liang.The second end of diagonal brace extends to side and the waist rail at the close foundation pit edge of the first campshed
It is welded to connect, enhances the Deformation control ability of retaining design.
It is tension member, anchored into the stratum of the outside soil body of foundation pit using waist rail as starting point, with the first campshed, the second campshed,
Campshed bears down on one, the first Guan Liang, the second Guan Liang and diagonal brace constitute a complete foundation pit system for coordinating stress together.
Half gravity dam formula foundation pit enclosure structure of the present invention increases tiltedly between double-row pile (the first campshed and the second campshed)
It supports and tension member, the compatibility of deformation ability of whole system can be greatly improved.Half gravity dam formula foundation pit enclosure structure of the present invention, one
Aspect greatly improves the effect of double-row pile (the first campshed and the second campshed) cooperative transformation, improves the compatibility of deformation of entire retaining design
Ability；On the other hand, the constraint that retaining design deforms larger position is increased, the change of building enclosure when greatly reducing excavation of foundation pit
Shape effectively improves the security performance of foundation pit supporting system.
As a kind of preferable embodiment, the deformation of foundation pit enclosure can be effectively reduced.In order to enhance the half of the present invention
The Deformation control ability of gravity dam formula foundation pit enclosure structure, the height of waist rail 4 to bottom of foundation ditch are the top of the first pile body 1 to base
Cheat the 1/3 of the height of bottom.
Specifically, waist rail 4 includes the upper beam body 41 being arranged along the edge of foundation pit and lower beam body 42.Upper beam body 41 and lower beam body
42 be two channel steels disposed in parallel.Upper beam body 41 and lower beam body 42 are connected to the close foundation pit edge of more first pile bodies 1
Side.Connection batten plate 43 is connected between upper beam body 41 and lower beam body 42.The end face of the second end of diagonal brace 5 is connected to beam body 41
With lower beam body 42 close to the first side of the first pile body 1, tension member 6 free end is installed on the remote of beam body 41 and lower beam body 42
The second side from the first pile body 1.
Upper beam body and lower beam body are welded together composition waist rail by connection batten plate, while reinforcing structure as the stress of waist rail
Part.
As a kind of preferable embodiment, tension member 6 be prestressed anchor or prestress anchorage cable.
The stratum of the soil body is combined closely on the outside of tension member 6 anchored end and foundation pit, bears prestressing force when construction tension member,
And the pulling force transmitted when foundation pit deformation.
The second side of upper beam body 41 and lower beam body 42 is connected with anchor plate 7.Perforation is formed on anchor plate 7.Tension member 6
Free end is arranged in perforation.Tension member 6 free end extends to side and the company far from upper beam body 41 and lower beam body 42 of anchor plate 7
It is connected to anchorage 8.Anchorage 8 is connected to anchor plate 7.
The side far from upper beam body 41 and lower beam body 42 of anchor plate 7 has slope.Anchorage 8 is connected to slope.By
Draw piece 6 is perpendicular to slope.As shown in fig. 1, at trapezoidal, the thickness of the upper end of anchor plate is less than anchor pad for the cross section of anchor plate
The thickness of the lower end of plate, the i.e. thickness of anchor plate are gradually reduced from the lower part of anchor plate to the top of anchor plate.
As a kind of preferable embodiment, waist rail 4 is located at the outside of more first pile bodies 1.Tension member and diagonal brace is located at
The side at the separate foundation pit edge of more first pile bodies.
It in some embodiments, can be between the stake between the first campshed and the second campshed after diagonal brace 5 is inserted into inter-pile soil
Soil carries out precipitation consolidation or soil stabilization.Precipitation consolidates, i.e., dewatering well is bored in inter-pile soil, recycles draining pump by dewatering well
The water of middle aggregation is discharged.Soil stabilization may be used cement mixing pile and carry out consolidation process to inter-pile soil.By to the first campshed
And the second inter-pile soil between campshed is consolidated or is reinforced the intensity that can improve the inter-pile soil so that reinforcing it is described
Inter-pile soil and the first campshed, the second campshed, campshed bear down on one, diagonal brace and tension member collectively constitutes half gravity dam formula foundation pit enclosure body
System, improves the ability of entire retaining design resistance to deformation.
Gravity dam is a kind of foundation pit system, generally using mixing pile by soil stabilization, by the dead weight of soil mass consolidation
It is usually that entirety is slided to the right to support soil pressure, failure mode.The retaining design may be implemented to facilitate base without support in hole
Cheat soil excavation.
Different with above-mentioned gravity dam, half gravity dam formula foundation pit enclosure structure of the present invention passes through the first campshed, second row
Stake, reinforce inter-pile soil, campshed bear down on one, diagonal brace and it is pre- it is tension member collectively constitute, not merely rely on foundation pit system gravity
On the outside of foundation pit to support the soil body therefore the pressure of the soil body, leads to this also by the diagonal brace of setting and collective effect tension member
The failure mode and force-mechanism of stress system are inconsistent, so gravity dam formula is can't be, still, half gravity dam formula of the present invention
Foundation pit enclosure structure has the principle of gravity dam concurrently, therefore referred to as half gravity dam formula.
The present invention provides a kind of construction methods of half gravity dam formula foundation pit enclosure structure, include the following steps：
S1：In embedded more first pile bodies 1 and the second pile bodies of Duo Gen 2 in the outside soil body for the foundation pit not excavated so that more
The first pile body of root 1 is arranged along the edge interval of foundation pit, more second pile bodies 2 are arranged in the same direction with more first pile bodies 1, more second
Pile body 2 is set to the side at the separate foundation pit edge of more first pile bodies 1 and the first pile body 1 and the second pile body 2 correspond.
S2：Diagonal brace 5 is provided, by the outside of foundation pit of the diagonal brace 5 between adjacent two couple the first pile body 1 and the second pile body 2
Oblique insertion in the soil body so that the first end of diagonal brace 5 is located at the top of the second pile body 2, the second end of diagonal brace 5 is located at the first pile body
1 middle part.
S21 provides diagonal brace 5, by the outside of foundation pit of the diagonal brace 5 between adjacent two couple the first pile body 1 and the second pile body 2
Oblique insertion in the soil body (inter-pile soil) so that the first end of diagonal brace 5 is located at the top of the second pile body 2, the second end of diagonal brace 5 is located at
The middle part of first pile body 1.
S22 after diagonal brace 5 is inserted into inter-pile soil, inter-pile soil between the first campshed and the second campshed carry out precipitation consolidation or
Person's soil stabilization.Precipitation consolidates, i.e., dewatering well is bored in inter-pile soil, recycles draining pump that the water assembled in dewatering well is discharged.
Soil stabilization may be used cement mixing pile and carry out consolidation process to inter-pile soil.
S3：In the outside soil body of more first pile bodies 1 and the top down excavation pit of the second pile body 2, in more first
The top of pile body 1 pours the first Guan Liang 11, the second Guan Liang 21 is poured in the top of more second pile bodies 2, in 11 He of the first Guan Liang
Campshed is poured between second Guan Liang 21 and bears down on one 3 so that the first end of diagonal brace 5 pours in the second Guan Liang 21.
S4：The inside soil body of excavation pit is to the position of the second end of diagonal brace 5.
After the intensity that the first Guan Liang, the second Guan Liang and Guan Liang are beared down on one reaches design strength, the inside soil of excavation pit
Body is to the position of the second end of diagonal brace 5.
S5：Waist rail 4 is provided, waist rail 4 is connected to the middle part of the side at the close foundation pit edge of more first pile bodies 1, and
The second end of diagonal brace 5 is connected to the first side of close first pile body 1 of waist rail 4.
Specifically, the shaped steel or steel reinforcement cage that the upper beam body of waist rail and lower beam body are connected in more first pile bodies are welded
It connects in succession so that above beam body and lower beam body are arranged and are set to along the edge of foundation pit the close foundation pit edge of the first pile body in the same direction
Side.It is welded to connect batten plate between upper beam body and lower beam body.
S6：There is provided tension member 6, tension member 6 has an opposite anchored end and a free end, by tension member 6 anchored end
It is embedded on the outside of the foundation pit of the edge side of the separate foundation pit of the first pile body 1 in the soil body, in waist rail 4 far from the first pile body 1
The second side installs tension member 6 free end so that tension member 6 free end and the second end contraposition of diagonal brace 5 are arranged.
Specifically, providing tension member, anchor plate and anchorage.Anchor plate is welded to connect in the separate of upper beam body and lower beam body
The side of first pile body.Tension member is prestressed anchor or prestress anchorage cable, and in the present embodiment, tension member is prestressed anchor
Rope.Prestress anchorage cable has anchored end and free end.It is using drilling machine construction prestress anchorage cable, the free end of prestress anchorage cable is oblique
To the perforation being inserted between upper beam body and lower beam body and across anchor plate, the free end of anchor cable is connected to anchorage so that anchor
Tool is resisted against the slope of anchor plate.Wait for that the anchoring section of prestress anchorage cable reaches design strength, to the free end of prestress anchorage cable
(anchor cable) carries out tensioning, reaches design prestressing force requirement.
S7：Continue the inside soil body of downward excavation pit to bottom A (the design of foundation pit depths of foundation pit in waist rail position
Degree).
It should be noted that structure, ratio, size etc. depicted in this specification institute accompanying drawings, only coordinating
The bright revealed content of book is not limited to the enforceable limit of the present invention so that those skilled in the art understands and reads
Fixed condition, therefore do not have technical essential meaning, the modification of any structure, the change of proportionate relationship or the adjustment of size, not
It influences under the effect of present invention can be generated and the purpose that can reach, should all still fall and be obtained in disclosed technology contents
In the range of capable of covering.Meanwhile it is cited such as "upper", "lower", "left", "right", " centre " and " one " in this specification
Term is merely convenient to being illustrated for narration, rather than to limit the scope of the invention, the change of relativeness or tune
It is whole, in the case where changing technology contents without essence, when being also considered as the enforceable scope of the present invention.
The present invention has been described in detail with reference to the accompanying drawings, those skilled in the art can be according to upper
It states and bright many variations example is made to the present invention.Thus, certain details in embodiment should not constitute limitation of the invention, this
Invention will be using the range that the appended claims define as protection domain.
Claims (8)
1. a kind of half gravity dam formula foundation pit enclosure structure, which is characterized in that more first including being embedded in the soil body on the outside of foundation pit
The second pile body of pile body and Duo Gen, more first pile bodies are arranged along the edge interval of the foundation pit, more second pile bodies
It is arranged in the same direction with more first pile bodies and first pile body is corresponded with second pile body, more described first
It is connected with the first Guan Liang at the top of body, the second Guan Liang, first Guan Liang and institute are connected at the top of more second pile bodies
It states and is connected with campshed between the second Guan Liang and bears down on one, be connected with waist rail in the middle part of more first pile bodies, the waist rail and described
Angularly disposed between second Guan Liang to have a diagonal brace, the first end of the diagonal brace is connected to second Guan Liang, and the second of the diagonal brace
End is inserted between first pile body of adjacent two and is connected to the first side backwards to the foundation pit edge of the waist rail,
The second side towards the foundation pit edge of the waist rail be equipped with it is angularly disposed tension member, it is described it is tension member have it is opposite
One anchored end and a free end, the free end tension member and the second end contraposition of the diagonal brace are arranged, described tension member
Anchored end is embedded in the soil body on the outside of the foundation pit.
2. half gravity dam formula foundation pit enclosure structure according to claim 1, which is characterized in that the waist rail to the foundation pit
The height of bottom be first pile body top to the bottom of foundation ditch height 1/3.
3. half gravity dam formula foundation pit enclosure structure according to claim 1, which is characterized in that the waist rail includes along described
The upper beam body and lower beam body of the edge setting of foundation pit, the upper beam body and the lower beam body are connected to more first pile bodies
Side close to the foundation pit edge, is connected with connection batten plate between the upper beam body and the lower beam body, and the of the diagonal brace
The end face at two ends is connected to the first side backwards to the foundation pit edge of the upper beam body and the lower beam body, described tension member
Free end is installed on the second side towards the foundation pit edge of the upper beam body and the lower beam body.
4. half gravity dam formula foundation pit enclosure structure according to claim 3, which is characterized in that described tension member for prestressing force
Anchor pole or prestress anchorage cable.
5. half gravity dam formula foundation pit enclosure structure according to claim 4, which is characterized in that the upper beam body and it is described under
The second side of beam body is connected with anchor plate, and perforation is formed on the anchor plate, and the free end tension member is arranged in described
Perforation, the free end tension member extend to side and the connection far from the upper beam body and the lower beam body of the anchor plate
There are anchorage, the anchorage to be connected to the anchor plate.
6. half gravity dam formula foundation pit enclosure structure according to claim 5, which is characterized in that the separate institute of the anchor plate
The side for stating beam body and the lower beam body has slope, and the anchorage is connected to the slope, described tension member vertical
In the slope.
7. half gravity dam formula foundation pit enclosure structure according to claim 1, which is characterized in that the waist rail is located at more institutes
State the side close to the edge of the foundation pit of the first pile body.
8. a kind of construction method of half gravity dam formula foundation pit enclosure structure, which is characterized in that include the following steps：
The second pile body of more first pile bodies and Duo Gen is buried along the edge of the foundation pit on the outside of the foundation pit not excavated, make in the soil body
More first pile bodies are obtained along the setting of the edge interval of the foundation pit, more second pile bodies and more first pile bodies
Setting and first pile body and second pile body one-to-one correspondence in the same direction；
Diagonal brace is provided, by the foundation pit of the diagonal brace between adjacent two couple first pile body and second pile body
Oblique insertion in the soil body of outside so that the first end of the diagonal brace be located at the top of second pile body, the diagonal brace second
End is positioned at the middle part of first pile body；
The outside soil body of the foundation pit is excavated at the top of first pile body described in Yu Duogen and second pile body, described in Yu Duogen
It pours the first Guan Liang at the top of one pile body, the second Guan Liang is poured at the top of the second pile body described in Yu Duogen, in first Guan Liang
Campshed is poured between second Guan Liang to bear down on one so that the first end of diagonal brace pours in second Guan Liang；
The soil body is to the position of the second end of the diagonal brace on the inside of excavation pit；
Waist rail is provided, the waist rail is connected to the middle part of more first pile bodies, and the second end of the diagonal brace is connected
In the first side backwards to the foundation pit edge of the waist rail；
There is provided it is tension member, it is described it is tension member have an opposite anchored end and a free end, the anchored end tension member is buried
In the soil body on the outside of the foundation pit, in the second side towards the foundation pit edge of the waist rail install it is described it is tension member from
By holding so that the free end tension member and the second end contraposition of the diagonal brace are arranged.
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| CN110093933A (en) * | 2019-05-10 | 2019-08-06 | 吴永红 | A kind of foundation pit vertically draws anchor support system and its construction method |
| CN111335327A (en) * | 2020-03-31 | 2020-06-26 | 江苏东合南岩土科技股份有限公司 | Deep anchor pile supporting system and construction method thereof |
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Application publication date: 20180928 |