CN107246016A - A kind of suspension type inner support system and foundation ditch construction method suitable for base pit engineering - Google Patents
A kind of suspension type inner support system and foundation ditch construction method suitable for base pit engineering Download PDFInfo
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- CN107246016A CN107246016A CN201710648025.6A CN201710648025A CN107246016A CN 107246016 A CN107246016 A CN 107246016A CN 201710648025 A CN201710648025 A CN 201710648025A CN 107246016 A CN107246016 A CN 107246016A
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- suspension rod
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- vertical suspension
- bracing members
- foundation ditch
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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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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D2300/00—Materials
- E02D2300/0026—Metals
- E02D2300/0029—Steel; Iron
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D2600/00—Miscellaneous
- E02D2600/20—Miscellaneous comprising details of connection between elements
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- General Engineering & Computer Science (AREA)
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Abstract
The invention discloses a kind of suspension type inner support system and foundation ditch construction method suitable for base pit engineering, belong to construction engineering technical field, including two row's fender posts/wall and its between multiple top supporting mechanisms, top Guan Liang, in shaft-like bracing members, multiple vertical spaced vertical suspension rods, the linking beam of square bar under oblique drawbar and each bracing members, wherein horizontal support is provided by top supporting mechanism and bracing members for foundation ditch, and use vertical suspension rod, oblique drawbar and linking beam to provide vertical supporting for horizontal support, form suspension type inner support system.The base pit engineering that is applied to of the present invention needs to set the suspension type inner support system of vertical supporting, it effectively prevent the construction of the neutral stanchion of existing base pit engineering and interim column, improve the efficiency of foundation pit construction, reduce the construction cost of foundation pit construction, and the waterproof effect and durability of Structural Engineering in base pit engineering are improved indirectly, improve the economy of base pit engineering.
Description
Technical field
The invention belongs to construction engineering technical field, and in particular to a kind of suspension type inner support system suitable for base pit engineering
System and foundation ditch construction method.
Background technology
Foundation ditch (foundation pit) is excavated in basic engineering position by substrate absolute altitude and basic plane size
Heatable adobe sleeping platform, base pit engineering mainly includes foundation pit supporting system design and construction and earth excavation, is a comprehensive very strong system
Engineering.Base pit engineering is to excavate a underground space downwards by ground, to ensure the stability of base pit engineering, and it is logical that it cheats interior surrounding
It is standing to be equipped with horizontal support structure.
In existing Foundation Pit Construction, especially for the base pit engineering that excavation width is larger, in foundation ditch inner bay
If during horizontal support structure, in order to reduce the compression computational length of supporting member, it is ensured that the stability safety of horizontal support structure,
Bear the loads such as the deadweight of horizontal support elements simultaneously, reduce moment of flexure that the vertical load such as support span and support deadweight produces and
Shearing is, it is necessary to set vertical supporting system.
The vertical supporting system set in existing base pit engineering is generally in the form of steel column insertion column pile foundation, with steel
Column realizes the inside vertical supporting of foundation ditch, although the vertical supporting system of above-mentioned form can play inside to a certain extent
The effect of support, but can not substantially ensure that horizontal support structure stability safety, its there are problems that as follows some：1. steel is stood
Post belongs to elongated compression member, and bearing capacity fails to give full play to the tensile and compressive strength of steel mainly by resistance to overturning control；2. steel
Column needs construction column pile foundation and inserts pile body certain length, causes extra stand column pile engineering cost, not economical enough；3.
In excavation of foundation pit, soil body unloading easily causes hole bottom resilience or hole bottom artesian water causes bottom heave, and then drives on steel column
It is floating, cause foundation ditch support bends to be pressurized, cause support additional bending moment and column extra normal force, easily cause support system and go along with sb. to guard him
Structural instability, influence structure safety；4. the presence of steel column so that space is split in foundation ditch, big machinery needs to avoid steel to stand
Post is cut the earth, muck haulage in influence earth excavation efficiency and hole；5. steel column passes through waterproof roll laying under bottom plate, bottom plate to interrupt, wear
Welding steel plate for sealing water is needed to carry out special water-proofing treatment at bottom plate, waterproof effect is difficult to ensure that；6. steel column pass through bottom plate, in
Plate, top plate, set up, reinforcing bar colligation and concreting have influence on its support, template；7. strip foundation pit structure is often
Twin spans symmetrical structure, beam (wall) cylinder system is located on foundation ditch axis, is not influence beam (wall) post to return to build, steel column and stand column pile
Need to avoid beam (wall) post and deviate foundation ditch axis line position, cause to support the asymmetry of support system, to structure stress not
Profit；8., it is necessary to set up scaffold and operation platform on floor after the completion of main structure construction, work high above the ground is carried out to steel column
Segmentation is cut and transported, and existing to recycle after potential safety hazard, and steel column cutting needs secondary multi-segment extension, and welding quality is difficult to
Ensure, be unfavorable for its recycling.The presence of drawbacks described above causes existing steel column formula inner support system in foundation pit construction
Greatly limited using receiving, have impact on the stable security construction of base pit engineering, reduce the efficiency of construction of base pit engineering.
The content of the invention
For the disadvantages described above or Improvement requirement of prior art, the invention provides a kind of hanging suitable for base pit engineering
Formula inner support system and foundation ditch construction method, wherein by setting oblique drawbar and vertical suspension rod to hang horizontal supporting system
Support is hung, first the concrete support structure at the top of two oblique drawbars and foundation ditch forms the triangle stress system of closing, from
And oblique drawbar tension, concrete support structure compression, the high pressure resistance for giving full play to concrete material can be with oblique drawbar
High tensile energy, then by setting vertical suspension rod to hang it, vertical constraint is provided for horizontal supporting system, effectively increase interior
The stability of strutting system of support system, reduces construction cost, improves the efficiency of foundation pit construction.
To achieve the above object, there is provided a kind of suspension type inner support suitable for base pit engineering for one aspect of the present invention
System, it is characterised in that including
Guan Liang, it is two, is respectively arranged at the top of the relative both sides fender post of foundation ditch/wall；
It is arranged at multiple top branch that between two Guan Liangs and two ends are each fixedly connected with Guan Liang one of them described respectively
Support mechanism, each top supporting mechanism spacing parallel arranging on the horizontal plane at the top of foundation ditch is arranged；
Bracing members, it is in shaft-like, and in the foundation ditch below the top supporting mechanism, wherein, the bracing members edge
Foundation ditch length direction horizontal interval arrange, each bracing members as between two opposite side fender posts/wall to support, for corresponding
Horizontal supporting force is provided in depth to the foundation pit enclosure stake/wall to maintain the stabilization of foundation ditch and control deformation；
Multiple vertical suspension rods being arranged at intervals in foundation ditch, the vertical suspension rod one end is fixedly installed on the top braces machine
Structure lower surface, the bracing members that the other end vertically stretches into foundation ditch as free end and the end is located in respective depth
Lower section, the free end end is connected respectively by two oblique drawbars, and the respective other end of two oblique drawbars is fixed respectively
In the Guan Liang at the top of the foundation ditch, so that the vertical suspension rod is tensed to carry the vertical suspension rod by two oblique drawbars
The hanging pulling force fed to；And
The bar shaped linking beam being fixed on the vertical suspension rod lower free end, it is arranged at below each bracing members,
When being tensed for the oblique drawbar described in two in the vertical suspension rod and restraining force vertically upward being provided, realize to the steel branch
Support and the vertical hanging of the linking beam.
As a further improvement on the present invention, be provided with the foundation ditch on multiple different depths many it is spaced apart
The bracing members, correspondingly, each vertical suspension rod are corresponding more piece, wherein the upper end and upper one of next vertical suspension rod of section
The vertical downrod lower end of section is is removably secured connection, and the linking beam corresponds to multiple and is respectively placed in correspondence depth
Each bracing members bottom simultaneously is fixedly connected to form vertical supporting to it with the bracing members.
As a further improvement on the present invention, connected between the linking beam and the bracing members by flute profile fixture.
As a further improvement on the present invention, each spaced apart vertical suspension rod is arranged at the sky between the bracing members
In gap.
As a further improvement on the present invention, axisymmetrical of two oblique drawbars along the vertical suspension rod is set.
As a further improvement on the present invention, the vertical suspension rod is connected with the top supporting mechanism by segmented head,
The lower section of the top supporting mechanism is fixed in one end of the segmented head, and one end of its other end and the vertical suspension rod is fastened
Connection, for only transmission pressure not to transmit pulling force to realize the steel between the vertical suspension rod and the top supporting mechanism
The stabilization of support vertically upward.
As a further improvement on the present invention, bridging, the scissors are additionally provided between the adjacent vertical suspension rod
Support includes two strut and ties arranged in a crossed manner, and the two ends of the strut and tie arranged in a crossed manner connect a vertical suspension rod respectively
Top and the bottom of a vertical suspension rod adjacent thereto be used to prevent the vertical suspension rod vertical misalignment to be formed
Scissors supporting construction.
As a further improvement on the present invention, the linking beam is two, is symmetrically arranged in the bottom of the vertical suspension rod
Both sides.
Another aspect of the present invention carries out base there is provided a kind of suspension type inner support system using suitable for base pit engineering
The method for cheating engineering construction, its method and step is as follows：
S1：Foundation ditch top is carried out to be excavated to after the absolute altitude of top supporting mechanism bottom, applied at the top of foundation ditch both sides fender post/wall
Work Guan Liang and its between top supporting mechanism, and in Guan Liang pre-buried connection oblique drawbar one end connector, in top branch
The horizontal steel plate of the pre-buried spacing steel cap in support mechanism midpoint bottom；
S2：After Guan Liang and top supporting mechanism reach the intensity of design requirement, continue downward excavation pit, and in level
Vertical spacing steel plate is welded under steel plate, spacing steel cap is formed；
S3：Continue excavation pit to lower one of support phase to answer after the absolute altitude of bottom, set up the vertical suspension rod of first segment and oblique drawbar,
Segmented head is set to be placed in spacing steel cap at the top of the vertical suspension rod of first segment, oblique drawbar top is connected by connector and Guan Liang
Connect, bottom is connected by connecting plate with vertical suspension rod；
S4：On the connecting plate of the vertical suspension rod bottom of first segment first of linking beam, first of company are longitudinally set up along foundation ditch
Binder is welded to connect with the vertical suspension rod of first segment and connecting plate；
S5：Bracing members are lifted, is erected on first of linking beam and two ends holds out against foundation ditch side, bracing members and first of company
Binder is fixed with flute profile fixture, and sets bridging between adjacent two vertical suspension rods；
S6：Continue to be excavated to down one of support phase and answer after the absolute altitude of bottom, erected in the vertical suspension rod bottom connection second section of first segment
Steel supporting plate is welded to suspension rod, and in its underpart；
S7：Welding second linking beam is set up on the steel supporting plate of vertical suspension rod bottom both sides, lifting sets up second steel branch
Support, and be connected with linking beam, bridging is set between adjacent two vertical suspension rods；When it is lower multiple tracks support, according to
Secondary repeat step S6-S7；
S8：Continue to be excavated to bottom of foundation ditch, carried out back building construction upwards by bottom of foundation ditch, carried out in bottom substrate bed course,
The construction of bottom plate, part side wall and structural column；
S9：Every one of the support phase of Hui Zhuzhi is answered after absolute altitude, is segmented the bracing members removed successively on each correspondence bottom absolute altitude, is linked
Beam, vertical suspension rod, carry out the side wall waterproof layer laying in corresponding height, and side wall, middle plate and the structure pile for completing correspondence absolute altitude are applied
Work；
S10：Top supporting mechanism is removed, Foundation Pit Construction is completed.
In general, by the contemplated above technical scheme of the present invention compared with prior art, with following beneficial effect
Really：
(1) the suspension type inner support system suitable for base pit engineering of the invention, the shape hung by using vertical suspension rod
Formula is used as the inner support system to the vertical supporting of base pit engineering horizontal support structure, and the closing triangle of power is used in top layer
Rule, by two oblique drawbars and the stress system of top supporting mechanism formation closing, gives full play to the characteristic of material；
(2) the suspension type inner support system suitable for base pit engineering of the invention, by setting suspension type inner support system,
The construction of stand column pile and interim column is effectively prevent, the step of enormously simplify foundation pit construction improves the effect of foundation pit construction
Rate, reduces the construction cost of foundation pit construction；
(3) the suspension type inner support system suitable for base pit engineering of the invention, by setting suspension type inner support system,
Due to there is no the barrier of interim column in digging process, the efficiency of construction excavation and muck haulage is further improved, work is shortened
Phase, reduce construction cost；
(4) the suspension type inner support system suitable for base pit engineering of the invention, can by layered arrangement inner support system
Further lift the inner support stability of a system during foundation pit construction, it is ensured that the security of Foundation Pit Construction, and can return
Build in work progress layering and remove inner support system in the range of pre- construction height, it is ensured that inner support system unit it is complete
Property, the repeatable utilization attribute of inner support system unit is improved, the economy of Foundation Pit Construction is further improved；
(5) the suspension type inner support system suitable for base pit engineering of the invention, effectively prevent stand column pile and interim vertical
Post builds the adverse effect of each plank frame in work progress to returning, it is ensured that the stability of Structural Engineering in foundation ditch, improves base
The waterproof effect and durability of Structural Engineering in hole, reduce the increased Maintenance and Repair expense because of structural failure, indirectly lifting
The economy of base pit engineering.
Brief description of the drawings
Fig. 1 is the overall structure diagram of the suspension type inner support system suitable for base pit engineering of the embodiment of the present invention；
Fig. 2 is the floor plan when suspension type inner support system of the embodiment of the present invention is arranged in strip foundation ditch；
Fig. 3 is the longitudinal sectional view when suspension type inner support system of the embodiment of the present invention is arranged in strip foundation ditch；
Fig. 4 be the embodiment of the present invention suspension type inner support system structure diagram in local I enlarged diagram；
Fig. 5 be the embodiment of the present invention suspension type inner support system in C-C directions sectional view in local I enlarged drawing；
Fig. 6 be the embodiment of the present invention suspension type inner support system structure diagram in local II enlarged diagram；
Fig. 7 be the embodiment of the present invention suspension type inner support system structure diagram in local III enlarged diagram；
Fig. 8 is the top support structure of the suspension type inner support system suitable for base pit engineering in the embodiment of the present invention two
Schematic diagram；
Fig. 9 is the top support structure of the suspension type inner support system suitable for base pit engineering in the embodiment of the present invention three
Schematic diagram；
Figure 10 is the top braces knot of the suspension type inner support system suitable for base pit engineering in the embodiment of the present invention four
Structure schematic diagram；
In all of the figs, same reference represents identical technical characteristic, is specially：1. fender post/wall, 2. hats
Beam, 3. top supporting mechanisms, 4. connectors, 5. spacing steel caps, 501. horizontal steel plates, 502. vertical spacing steel plates, 6. segmented heads,
7. vertical suspension rod, 8. oblique drawbars, 9. connecting plates, 10. linking beams, 11. bracing members, 12. steel supporting plates, 13. bottom plate underlayers and
Waterproof layer, 14. bottom plates, 15. side walls, plate, 17. top plates, 18. bridgings, 19. flute profile fixtures in 16..
Embodiment
In order to make the purpose , technical scheme and advantage of the present invention be clearer, it is right below in conjunction with drawings and Examples
The present invention is further elaborated.It should be appreciated that specific embodiment described herein is only to explain the present invention, not
For limiting the present invention.
As long as in addition, technical characteristic involved in each embodiment of invention described below is each other not
Constituting conflict can just be mutually combined.
Fig. 1~7 show the structure of the suspension type inner support system suitable for base pit engineering in a preferred embodiment
Schematic diagram.Wherein, Fig. 1 is the overall structure signal of the suspension type inner support system suitable for base pit engineering of the embodiment of the present invention
Figure；Fig. 2 is the floor plan when suspension type inner support system of the embodiment of the present invention is arranged in strip foundation ditch；Fig. 3 is this
The suspension type inner support system of inventive embodiments is arranged in longitudinal sectional view during strip foundation ditch；Fig. 4 is the embodiment of the present invention
Suspension type inner support system structure diagram in local I enlarged diagram；Fig. 5 is propped up in the suspension type of the embodiment of the present invention
C-C directions sectional view in support system in local I enlarged drawing；Fig. 6 is the suspension type inner support system architecture of the embodiment of the present invention
Local II enlarged diagram in schematic diagram；Fig. 7 be the embodiment of the present invention suspension type inner support system structure diagram in office
The enlarged diagram in portion III；Fig. 8 is the top of the suspension type inner support system suitable for base pit engineering in the embodiment of the present invention two
Portion's supporting construction schematic diagram；Fig. 9 is the top of the suspension type inner support system suitable for base pit engineering in the embodiment of the present invention three
Portion's supporting construction schematic diagram；Figure 10 is the top of the suspension type inner support system suitable for base pit engineering in the embodiment of the present invention four
Portion's supporting construction schematic diagram.Further, Fig. 1 can press direction A-A sectional view for the schematic construction in Fig. 2, and Fig. 3 can be
Schematic construction in Fig. 2 presses direction B-B sectional view.
Further specifically, the foundation pit structure in a preferred embodiment is elongated horizontal foundation ditch, base pit engineering
Longitudinal cross-section be preferably rectangle, the both sides of base pit engineering be provided with the fender post of the insertion side bottom certain depth of foundation ditch two/
Wall 1；Further, on the longitudinal profile of foundation pit structure, preferably layered arrangement has and its two ends and base parallel with foundation ditch bottom surface
The bracing members 11 that the both sides fender post/wall 1 in hole is held out against, the two ends of bracing members 11 are vertical preferably with the both sides crater wall face of foundation pit structure
Set, bracing members 11 in a preferred embodiment have two layers on the longitudinal direction of foundation pit structure, between two layers of bracing members 11
Interval is not specifically limited, and it controls to calculate and specifically determined according to the bearing capacity of foundation pit enclosure.
Further, it is preferable to which the both sides at the top of foundation pit structure in embodiment are provided with two Guan Liangs along foundation ditch is longitudinally asymmetric
2, Guan Liang 2 is preferably disposed on the top braces machine being provided between the top of fender post/wall 1, Guan Liang 2 for supporting foundation pit structure
Top supporting mechanism 3 in structure 3, a preferred embodiment supports for concrete, as concrete support mechanism；Further specifically,
On the horizontal section of foundation pit structure, the junction of Guan Liang 2 positioned at top supporting mechanism 3 with foundation pit structure both sides is preferably provided with
Connector 4, connector 4 further preferably can nuzzle in Guan Liang 2 in advance.
Further, the middle part correspondence both sides connector 4 of the top supporting mechanism 3 in a preferred embodiment is symmetrical arranged
Limited location steel cap 5, as shown in Figures 4 and 5.Spacing steel cap 5 is preferably arranged at concrete in pre-buried form and supports 3 span centre bottoms, is used for
The horizontal displacement of vertical suspension rod 7 of suspension is limited, and spacing steel cap 5 specifically includes pre- concrete support of nuzzling in a preferred embodiment
In horizontal steel plate 501 and vertically disposed for vertical spacing to vertical suspension rod 7 of in the vertical direction with horizontal steel plate 501
Spacing steel plate 502, the vertical spacing steel plate 502 is preferably tubular, and it is on horizontal steel plate 501；Further, vertical limit
Segmented head 6 is provided with the steel plate 502 of position, vertical suspension rod 7 is connected with below, upper end is inserted in spacing steel cap and withstands top braces
The bottom of mechanism 3；Specifically, the two ends of vertical suspension rod 7 are provided with connector, for many vertical suspension rods 7 matching connections and/
Or be fastenedly connected with segmented head 6.
Further, the quantity and length of the vertical suspension rod 7 in a preferred embodiment preferably correspond to bracing members 11
The number of plies and vertical spacing, and on the longitudinal cross-section of base pit engineering, vertical suspension rod 7 is arranged under correspondence top supporting mechanism 3
Side, it is preferably passed through from same layer steel support structure between two bracing members 11, as shown in Figures 1 to 3.Further, preferred
In embodiment, the setting number of plies of bracing members 11 is two layers, corresponding, it is necessary to construct back what is built below 11 in top bracing members
Plank frame is also two layers, i.e., plate 16 and bottom plate 14 in being respectively from top to bottom, further, the vertical suspension rod 7 being correspondingly arranged
Quantity be also two, on the longitudinal cross-section of base pit engineering, the upper end of first vertical suspension rod 7 connects segmented head 6, is placed in limit
In position steel cap 5, its lower end and the upper end of second vertical suspension rod 7 are fastenedly connected, overall vertical with bottom of foundation ditch plane.
Vertical suspension rod 7 and Guan Liang 2 are connected further, it is preferable to be provided with oblique drawbar 8 in embodiment, oblique drawbar 8
It can be more preferably reinforcing pull rod.Specifically as shown in Figure 6, in the bottom preferred pair of the vertical suspension rod 7 of basipetal first segment
Claim to be provided with the connecting plate 9 for connecting the lower end of oblique drawbar 8, the upper end connection of oblique drawbar 8 is located at both sides hat at the top of foundation ditch
Default connector 4 on beam 2, then vertical suspension rod 7, two oblique drawbars 8 and concrete support 3 is collectively forming two with vertical suspension rod
7 symmetrical triangle load-carrying construction, two oblique drawbars 8 and concrete support 3 form a stable triangle load-carrying construction, realize
To the inside suspended support of foundation ditch top horizontal supporting construction；Further, the cross sectional shape of connecting plate 9 is preferably to be trapezoidal
And/or it is square, linking beam 10 is provided with its upper surface, the setting quantity of its every vertical suspension rod 7 of correspondence is preferably two, point
Not She Yu vertical suspension rod 7 both sides, arranged with the axisymmetrical of vertical suspension rod 7, linking beam 10 in the present embodiment is preferably
Channel-section steel, and the side of channel-section steel abuts the periphery wall of vertical suspension rod 7, below channel-section steel side on the upper surface of connecting plate 9,
Another side of channel-section steel is preferably contacted close to the lower surface of bracing members 11 between bracing members 11 and linking beam 10, linking beam 10
It is provided for sharing bracing members 11 to conduct oneself with dignity and strengthen its stability；Further, it is preferable to be connected below the vertical suspension rod 7 of second section
The bottom of vertical suspension rod 7 be provided with steel supporting plate 12, for setting linking beam 10 on the top of steel supporting plate 12, steel supporting plate 12 is preferred
The both sides of vertical suspension rod 7 are arranged at the axisymmetrical of vertical suspension rod 7, that is, are arranged at the linking beam 10 on steel supporting plate 12 also with perpendicular
Set to the axisymmetrical of suspension rod 7；Consolidate it is further preferred that the place that bracing members 11 are corresponded on linking beam 10 is provided with flute profile
Determine part 19, flute profile fixture 19 is preferably square frame-shaped flute profile fixture, and its two ends connects linking beam along the axial restraint of linking beam 10
On 10, and bracing members 11 are radially confined within flute profile fixture 19, as shown in Figure 3, flute profile fixture 19 is with connecting
Binder 10 constitute closed collar structure, for prevent bracing members 11 in the horizontal direction with vertical direction occur flexing unstability, enter
Preferably, flute profile fixture 19 is preferably channel-section steel, groove of the bracing members 11 axially across channel steel shape flute profile fixture 19 to one step.
Further, on the longitudinal cross-section of base pit engineering, the vertical suspension rod 7 on sustained height is linked by perpendicular
The stable connection of beam 10, to ensure the longitudinal stability of inner support system, and exists with the vertical suspension rod 7 with the bracing members 11 that layer is arranged
On the premise of two ends and foundation ditch side are held out against, longitudinal load-bearing on linking beam 10, prevent bracing members 11 due to Gravitative Loads
Shifted in vertical direction and unstability；It is further preferred that in order to further ensure that vertical suspension rod 7 is not sent out on foundation ditch longitudinal direction
Raw vertical misalignment, sets bridging 18 preferably between the adjacent vertical suspension rod 7 of same layer, and the bridging 18 is set by two intersections
Put strut and tie composition, by taking adjacent No. one vertical suspension rod 7 and No. two vertical suspension rods 7 as an example, wherein one end of a pull bar and
The top connection of a number vertical suspension rod 7, its other end is connected with the bottom of adjacent No. two vertical suspension rods 7, correspondingly, Ling Yigen
Pull bar and above-mentioned strut and tie are arranged in a crossed manner, and its one end connects the bottom of a vertical suspension rod 7, and the other end connects No. two vertical suspension rods
7 top, two strut and ties form bridgings 18 to ensure that oscillation in the pitch mode skew does not occur for vertical suspension rod 7 on foundation ditch longitudinal direction.
It is further preferred that the length of oblique drawbar 8, size, material etc. are not specifically limited, it can be according to base pit engineering
Concrete condition be preferably provided with, correspondingly, size, material of vertical suspension rod 7 etc. are also not specifically limited, connector 4, even
The cross sectional shape and/or construction of fishplate bar 9 and the grade part of steel supporting plate 12 also can be specifically chosen according to stressing conditions, in present invention implementation
It is not specifically limited in example.It is further preferred that when first of support top has the truss structures such as Bailey beam (such as across station
Road surface bedding structure), its bearing capacity is met when bearing vertical reinforcing pull rod concentrated force, can also be mixed in truss frame structure with first
Vertical suspension rod is directly set between solidifying soil support, vertical hanging pulling force is passed into the truss structures such as Bailey beam, vertical lifting is formed
Hanging body system, as shown in figs. 8-10.
One preferred embodiment base pit engineering needs two layers of underground structure of constructing, that is, needs to set one of concrete to support and two layers
Bracing members, its construction procedure for carrying out strip Foundation Pit Construction with above-mentioned suspension type inner support system is preferably as follows：
S1：Traffic data process is carried out, construction guard fender is built, and applied after corresponding pipeline is changed into shifting, smooth construction site
Work leads the construction of wall and fender post/wall 1.
S2：Foundation ditch top is carried out to be excavated to after concrete support 3 (i.e. first support) bottom absolute altitude, Guan Liang 2 and concrete branch is carried out
The construction of support 3, and the built-in connection 4 in Guan Liang 2, and support the pre-buried spacing grade of steel cap 5 part in 3 span centre bottoms in concrete.
S3：Continuing excavation pit, (such as second support is default to first layer bracing members 11 (i.e. second is supported) bottom absolute altitude
The bottom 1m of position) after, set the vertical suspension rod 7 of first segment that connecting plate 9 simultaneously is set in its bottom, connector 4 and connecting plate 9 it
Between oblique drawbar 8 is set, first group of linking beam 10 is set in the bottom of the vertical suspension rod 7 of first segment, first layer bracing members 11 are set up
(i.e. second is supported) simultaneously sets flute profile fixture 19, and bridging 18 is set between adjacent vertical suspension rod 7.
S4：Continuing excavation pit, (support of such as the 3rd road is default to second layer bracing members 11 (i.e. the 3rd road support) bottom absolute altitude
The bottom 1m of position) set up afterwards, the vertical suspension rod 7 of second section is set and steel supporting plate 10 is set in its bottom, and on steel supporting plate 10
Second group of linking beam 10 is set, second layer bracing members 11 (i.e. the 3rd road support) is set up and corresponding flute profile fixture 19 is set,
Bridging 18 is set between adjacent vertical suspension rod 7.
S5：Continue to be excavated to bottom of foundation ditch, carried out back building construction upwards by bottom of foundation ditch, substrate bed course is carried out in bottom
13rd, the construction of bottom plate 14, part side wall, bottom girder and structural column.
S6：Second layer bracing members 11 (i.e. the 3rd road support), second group of linking beam 10, the vertical suspension rod of second section are removed successively
The structures such as 7, carry out the side wall waterproof layer laying of subbasement, complete subbasement side wall, middle plate 16 and structure pile driving construction,
And the form that middle plate 16 is preferably poured by armored concrete is set up.
S7：First layer bracing members 11 (i.e. second is supported), first group of linking beam 10, the vertical suspension rod of first segment are removed successively
The structure such as 7 and oblique drawbar 8, carries out the side wall waterproof layer laying of underground first layer, completes underground first layer side wall and structure pile,
And the top plate 17 at the top of B1 is constructed, the form that top plate 17 is preferably poured by armored concrete is set up.
S8：Concrete support 3 (i.e. first support) is removed, backfill earthing is carried out and recovers respective lines, Demolition Construction leads wall
And construction guard fender, recover earth surface area and normally use, complete Foundation Pit Construction.
Above-mentioned construction procedure carries out underground suitable for foundation ditch and constructed for two layers, if base pit engineering has three layers or three layers with Shangdi
The construction requirement of lower structure, can repeat to add S4 construction procedure between S4 and S5, set up corresponding supporting construction, and do phase
The pattern handling answered, further, can also increase between S5 and S6 equivalent layer plank frame return build, supporting construction remove etc.
Step, step content is carried out with reference to S6, is finally completed the overall process construction of base pit engineering；Further, as art technology
Personnel for the bracing members 11 that Foundation Pit Construction provides horizontal support it should be understood that also can completely or partially replace with other level
Supporting construction, such as concrete supporting construction, and bracing members 11 can be steel pipe or H profile steel/I-steel etc. in specific select
Other steel materials.
When using suspension type inner support system of the invention and carrying out Foundation Pit Construction according to above-mentioned steps, it is being excavated
Initial stage, (such as step S1) need not carry out the construction of stand column pile and/or interim column, simplify construction procedure, improve construction effect
Rate, reduces in construction cost, digging process (such as step S2~S5) corresponding influence also without interim column, excavation, muck haulage
Efficiency further lifted, the construction period of base pit engineering is greatly shortened, and constructed in top plate 17, middle plate 16 and bottom plate 14
Journey (such as step S5~S7), also eliminates the threading influence of interim column, improves the integrality of foundation ditch internal structure.
As it will be easily appreciated by one skilled in the art that the foregoing is merely illustrative of the preferred embodiments of the present invention, it is not used to
The limitation present invention, any modifications, equivalent substitutions and improvements made within the spirit and principles of the invention etc., it all should include
Within protection scope of the present invention.
Claims (9)
1. a kind of suspension type inner support system suitable for base pit engineering, it is characterised in that including
Guan Liang (2), it is two, is respectively arranged at the top of the relative both sides fender post of foundation ditch/wall (1)；
It is arranged at multiple tops that between two Guan Liangs (2) and two ends are each fixedly connected with Guan Liang one of them described (2) respectively
Supporting mechanism (3), each top supporting mechanism (3) spacing parallel arranging on the horizontal plane at the top of foundation ditch is arranged；
Bracing members (11), it is in shaft-like, and in the foundation ditch below the top supporting mechanism (3), wherein, the bracing members
(11) arranged along foundation ditch length direction horizontal interval, each bracing members (11) are used as pair between two opposite side fender posts/wall (1)
Support, for maintaining stabilization and the control of foundation ditch to the foundation pit enclosure stake/wall (1) offer horizontal supporting force in respective depth
Deformation；
Multiple vertical suspension rods (7) being arranged at intervals in foundation ditch, vertical suspension rod (7) one end is fixedly installed on the top braces
Mechanism (3) lower surface, the other end vertically stretches into foundation ditch as free end and the end is located at described in respective depth
Below bracing members (11), the free end end is connected respectively by two oblique drawbars (8), and two oblique drawbar (8) is each
The other end be individually fixed in the Guan Liang (2) at the top of foundation ditch Nei so that the vertical suspension rod (7) is by two oblique drawbars
(8) tense to provide upward hanging pulling force to the vertical suspension rod (7)；And
The bar shaped linking beam (10) being fixed on vertical suspension rod (7) lower free end, it is arranged at each bracing members
(11) lower section, tenses for the oblique drawbar (8) described in two in the vertical suspension rod (7) and provides restraining force vertically upward
When, realize the vertical hanging to the bracing members (11) and the linking beam (10).
2. the suspension type inner support system according to claim 1 suitable for base pit engineering, wherein, it is multiple in the foundation ditch
The many spaced apart bracing members (11) are provided with different depth, correspondingly, each vertical suspension rod (7) for pair
The more piece answered, wherein the upper end of next vertical suspension rod (7) of section and vertical suspension rod (7) lower end of upper one section are the company of being removably secured
Connect, and the linking beam (10) correspond to it is multiple and be respectively placed in correspondence depth each bracing members (11) bottom and with it is described
Bracing members (11) are fixedly connected to form vertical supporting to it.
3. the suspension type inner support system according to claim 1 or 2 suitable for base pit engineering, wherein, the linking beam
(10) connected between the bracing members (11) by flute profile fixture (19).
4. according to the suspension type inner support system according to any one of claims 1 to 3 suitable for base pit engineering, wherein, respectively
Spaced apart vertical suspension rod (7) is arranged in the space between the bracing members (11).
5. according to the suspension type inner support system according to any one of claims 1 to 4 suitable for base pit engineering, wherein, two
Axisymmetrical of the individual oblique drawbar (8) along the vertical suspension rod (7) is set.
6. according to the suspension type inner support system according to any one of claims 1 to 5 suitable for base pit engineering, wherein, institute
State vertical suspension rod (7) to be connected by segmented head (6) with the top supporting mechanism (3), one end of active (6) head is fixed on
The lower section of the top supporting mechanism (3), its other end and one end of the vertical suspension rod (7) are fastenedly connected, for described
Vertically only transmission pressure does not transmit pulling force to realize the bracing members (11) between suspension rod (7) and the top supporting mechanism (3)
Stabilization vertically upward.
7. according to the suspension type inner support system according to any one of claims 1 to 6 suitable for base pit engineering, wherein, phase
Bridging (18) is additionally provided between the adjacent vertical suspension rod (7),
The bridging (18) includes two strut and ties arranged in a crossed manner, and the two ends of the strut and tie arranged in a crossed manner are connected respectively
The top of piece vertical suspension rod (7) and the bottom of a vertical suspension rod (7) adjacent thereto are used to prevent to be formed
The only scissors supporting construction of vertical suspension rod (7) vertical misalignment.
8. according to the suspension type inner support system according to any one of claims 1 to 7 suitable for base pit engineering, wherein, institute
Linking beam (10) is stated for two, the two bottom sides of the vertical suspension rod (7) are symmetrically arranged in.
9. a kind of method that Foundation Pit Construction is carried out using the suspension type inner support system suitable for base pit engineering, its method step
It is rapid as follows：
S1：Foundation ditch top is carried out to be excavated to after the absolute altitude of top supporting mechanism (3) bottom, in foundation ditch both sides at the top of fender post/wall (1)
Guan Liang of constructing (2) and its between top supporting mechanism (3), and in Guan Liang (2) pre-buried connection oblique drawbar one end connection
Part (4), in the horizontal steel plate (501) of the pre-buried spacing steel cap (5) in top supporting mechanism (3) span centre bottom；
S2：After Guan Liang (2) and top supporting mechanism (3) reach the intensity of design requirement, continue downward excavation pit, and in water
Vertical spacing steel plate (502) is welded under plain plate (501), spacing steel cap (5) is formed；
S3：Continue excavation pit to lower one of support phase to answer after the absolute altitude of bottom, set up the vertical suspension rod of first segment (7) and oblique drawbar
(8), segmented head (6) is set to be placed in spacing steel cap (5) at the top of the vertical suspension rod of first segment (7), oblique drawbar (8) top passes through
Connector (4) is connected with Guan Liang (2), and bottom is connected by connecting plate (9) with vertical suspension rod (7)；
S4：First of linking beam (10) is longitudinally set up along foundation ditch on the connecting plate (9) of the vertical suspension rod of first segment (7) bottom, the
One of linking beam (10) is welded to connect with the vertical suspension rod of first segment (7) and connecting plate (9)；
S5：Lift bracing members (11), be erected on first of linking beam (10) and two ends hold out against foundation ditch side, bracing members (11) with
First of linking beam (10) is fixed with flute profile fixture (19), and the setting bridging (18) between adjacent two vertical suspension rods；
S6：Continue to be excavated to down one of support phase and answer after the absolute altitude of bottom, connection second section is vertical in the vertical suspension rod of first segment (7) bottom
Suspension rod (7), and in its underpart welding steel supporting plate (12)；
S7：Welding second linking beam (10), mast-up are set up on second vertical suspension rod (7) bottom both sides steel supporting plate (12)
If second bracing members (11), it is connected with linking beam (10) with flute profile fixture (19), and in adjacent two vertical suspension rods
(7) bridging (18) is set between；When it is lower multiple tracks support, repeat step S6-S7；
S8：Continue to be excavated to bottom of foundation ditch, carried out back building construction upwards by bottom of foundation ditch, bottom carry out substrate bed course (13),
The construction of bottom plate (14), part side wall and structural column；
S9：Every one of the support phase of Hui Zhuzhi is answered after absolute altitude, is segmented the bracing members (11) removed successively on each correspondence bottom absolute altitude, is linked
Beam (10), vertical suspension rod (7), carry out the side wall waterproof layer laying in corresponding height, complete side wall, the middle plate (16) of correspondence absolute altitude
With structure pile driving construction；
S10：Top supporting mechanism is removed, Foundation Pit Construction is completed.
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| CN201710648025.6A CN107246016B (en) | 2017-08-01 | 2017-08-01 | Hanging type inner support system suitable for foundation pit engineering and foundation pit construction method |
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| CN201710648025.6A CN107246016B (en) | 2017-08-01 | 2017-08-01 | Hanging type inner support system suitable for foundation pit engineering and foundation pit construction method |
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| CN108193695A (en) * | 2018-01-25 | 2018-06-22 | 中铁第六勘察设计院集团有限公司 | A kind of enclosure structure of foundation pit of subway station support and construction method |
| CN108316315A (en) * | 2018-03-29 | 2018-07-24 | 中铁第四勘察设计院集团有限公司 | It is a kind of to exempt to set up the vertical stability structure of stanchion suitable for foundation pit |
| CN110230317A (en) * | 2019-06-13 | 2019-09-13 | 杜希田 | A kind of subway foundation pit support construction |
| CN110306594A (en) * | 2019-07-02 | 2019-10-08 | 武汉立诚岩土工程有限公司 | Support system is gone along with sb. to guard him applied to open cut backfill formula constructing tunnel |
| CN111335321A (en) * | 2020-03-12 | 2020-06-26 | 广东省建筑构件工程有限公司 | Deep foundation pit structure above subway tunnel and construction method thereof |
| CN115405759A (en) * | 2022-08-19 | 2022-11-29 | 浙江交工集团股份有限公司 | Pile foundation rotary digging pore-forming underground gas pipeline in-situ isolation protection system and construction method |
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| CN115405759A (en) * | 2022-08-19 | 2022-11-29 | 浙江交工集团股份有限公司 | Pile foundation rotary digging pore-forming underground gas pipeline in-situ isolation protection system and construction method |
| CN115405759B (en) * | 2022-08-19 | 2024-05-24 | 浙江交工集团股份有限公司 | In-situ isolation protection system for pile foundation rotary digging pore-forming underground gas pipeline and construction method |
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