CN206034461U - Subway foundation pit large -span support system - Google Patents

Subway foundation pit large -span support system Download PDF

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Publication number
CN206034461U
CN206034461U CN201621046726.XU CN201621046726U CN206034461U CN 206034461 U CN206034461 U CN 206034461U CN 201621046726 U CN201621046726 U CN 201621046726U CN 206034461 U CN206034461 U CN 206034461U
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CN
China
Prior art keywords
support
truss
foundation pit
horizontal
support unit
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Expired - Fee Related
Application number
CN201621046726.XU
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Chinese (zh)
Inventor
王辉
魏倩
周环宇
巴鑫
慕冬冬
吴全龙
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China Construction Third Engineering Bureau Co Ltd
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China Construction Third Engineering Bureau Co Ltd
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Priority to CN201621046726.XU priority Critical patent/CN206034461U/en
Application granted granted Critical
Publication of CN206034461U publication Critical patent/CN206034461U/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

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Abstract

The utility model provides a subway foundation pit large -span support system, this system of includes the horizontal truss support unit of horizontal support between foundation ditch underground continuous wall, horizontal truss support unit along the length and the parallel interval evenly distributed of direction of height of foundation ditch, horizontal truss support unit include plane truss support, plane truss support and vertical connection be at between the two connecting rod down. The utility model discloses in the work progress, earlier install the horizontal support unit in designed elevation 1, the corresponding soil body of layered excavation then, it drops to designed elevation 2 with the horizontal support unit through lift power device to recycle the guide rail, the corresponding soil body of layered excavation once more, analogize with this like this, to bottom construction completion, high construction efficiency, be applicable to the earthwork excavation construction of deep basal pit, additionally, the horizontal support unit adopts space truss formula structure, high in structural strength, adopt this kind of support system when satisfying subway foundation pit stability and being out of shape the control requirement, the characteristics that still have the large -span.

Description

A kind of subway foundation pit large span support system
Technical field
This utility model is related to subway foundation pit construction field, particularly a kind of supporter.
Background technology
At present, for the main support system that subway foundation pit is adopted is mainly armored concrete and steel pipe to supportting, particularly Steel pipe support therein, its horizontally disposed spacing are often less than 3m, but with the further development in subway field, foundation ditch Width is also increasing, and traditional support strength can not meet the demand of subway foundation pit large span, additionally, narrow based on subway station Long, the flat shape feature of rectangle, the method that subway foundation pit earth excavation typically moves back digging relay using step are carried out.Due to water Flat to support the spacing for arranging too closely, operation side is little, and earth excavation machinery often adopts the less excavating equipment of dipper capacity, Earth excavation is completed by way of step relay, earth excavation work efficiency is greatly reduced;On the other hand, in steel pipe support When lifting by root, because closeer horizontal support spacing, it is necessary to avoid the mutual collision supported when lifting, still need after lifting is in place It is supported end and is welded and fixed and supports pre-stress construction, supports installation difficulty, efficiency of construction underground.
It is well known that the principle that pit earthwork excavation must comply with " first support and dig afterwards " is carried out, found by investigating, even if adopting Earth excavation is carried out with the less digging machine of the relatively low dipper capacity of work efficiency, and the installation efficiency of support far can not also meet earth excavation will Ask, earth excavation and support install no matter both temporally and spatially cannot realize mutually satisfaction, cause horizontal support Installation often lags behind earth excavation, is that base pit engineering buries huge potential safety hazard.
To sum up, for the subway foundation pit engineering of current sleeve configuration rule, opened using existing horizontal struts system and the earthwork Excavation method, causes certain difficulty on duration and safety to engineering construction.
Utility model content
The purpose of this utility model is to provide a kind of subway foundation pit large span support system, solve existing foundation ditch support across Spend the low technical problem of little, structural strength;And solve the problems, such as low construction efficiency.
For achieving the above object, this utility model is adopted the following technical scheme that:
A kind of subway foundation pit large span support system, including the horizontal truss being horizontally supported between foundation ditch diaphram wall Support unit, the horizontal truss support unit are uniformly distributed along the length and short transverse parallel interval of foundation ditch, the water Plane frame work support unit includes plane girder support, lower plane truss support and vertical connection connecting rod therebetween.
The upper plane girder support include two along foundation ditch width arrange to supportting steel truss, being connected to support steel Fringe truss between truss two ends is supportted to the Chinese lute supportted on the two sides of steel truss two ends with being connected to.
The lower plane truss support is identical with upper plane girder supporting construction, and parallel interval arrange.
The described pair of support steel truss include it is parallel to support mobile jib and be connected to support between mobile jib to supportting web member.
The fringe truss includes the fringe truss web member between parallel fringe truss mobile jib and connection fringe truss mobile jib.
The Chinese lute support includes angularly disposed to supportting the Chinese lute support mobile jib between steel truss and fringe truss and connection Chinese lute Support mobile jib and the Chinese lute to supportting between steel truss and fringe truss support web member.
Lifting drive mechanism is connected between the fringe truss and foundation ditch diaphram wall of the horizontal truss support unit.
At least four groups of the lifting drive mechanism, it is symmetrically distributed in horizontal truss support unit both sides.
The lifting drive mechanism includes being connected to the jack of horizontal truss support unit end, be connected to jack before The cradle head at end, the rolling wheel support being hinged on cradle head and the roller being hinged on rolling wheel support.
The rolling wheel support is triangular plate or bends strip board at an acute angle, its drift angle and cradle head be hinged, Two base angles are symmetrically hinged with a roller.
This utility model has the characteristics that and beneficial effect compared with prior art:
This utility model subway foundation pit construction different from the past, but by the rectangle rule subway foundation pit of sleeve configuration is drawn It is divided into some units, each unit is meeting subway foundation pit stability and Deformation control requirement by arranging level support unit On the premise of, with assembled, large span, liftable feature so that subway foundation pit working space is big, and efficiency of construction is more Height, be that subway foundation pit construction field proposes a kind of new support system and construction method, is that low-carbon (LC), green, quick, safety are applied Work technology, can accelerate earth excavation work efficiency, shorten the engineering construction duration, while the integral elevating by level support unit, Traditional subway foundation pit is avoided first to support deep pit monitor hidden danger caused by the principle dug afterwards because barbarous construction can not be followed.
In work progress, level support unit is arranged on into designed elevation 1 first, then the corresponding soil body of stage excavation, then Level support unit is dropped to into designed elevation 2 by lifting power plant using guide rail, again the corresponding soil body of stage excavation, this Sample by that analogy, is completed to bottom construction, and efficiency of construction is high, it is adaptable to the earth excavation construction of deep basal pit, in addition, horizontal support Unit adopts space truss type structure, and structural strength is high, is meeting subway foundation pit stability and deformation using this support system Control is while require, also with large span the characteristics of, 18m is respectively with the size of subway foundation pit both direction, as a example by 23m, The headroom of about 13m × 16m in the range of support system, is defined, large-scale work surface can be provided and made for backacter machine Industry space, and the lifting of level support unit is completed using lifting drive unit matching guide rail, than installing more conventional coagulation Soil or steel pipe inner supporting are more efficient, and safety coefficient is more preferable, structure is more stable.
Description of the drawings
The utility model is described in more detail below in conjunction with the accompanying drawings.
Fig. 1 is the structural representation of this utility model horizontal truss support unit.
Fig. 2 is design structure schematic diagram before this utility model construction.
Fig. 3 is the view of step 5 of the present utility model.
Fig. 4 is the view of step 7 of the present utility model.
Fig. 5 is the view of step 11 of the present utility model.
Fig. 6 is the view of step 12 of the present utility model.
Fig. 7 is the structural representation of this utility model lifting drive mechanism.
Reference:1- is to supportting steel truss, 2- fringe trusses, the support of 3- Chinese lute, 4- subway foundation pits, the first undergrounds of 5- company Continuous wall, the second diaphram walls of 6-, the first Guan Liangs of 7-, the second Guan Liangs of 8-, 9- ground floor horizontal truss support units, 10- Lifting drive mechanism, the first layer soil bodies of 11-, 12- second layer horizontal truss support units, the first layer soil bodies of 13-, 14- rollers, 15- jack, 16- cradle heads, 17- rolling wheel supports.
Specific embodiment
Embodiment is shown in Figure 1, and in this example, the size of subway foundation pit both direction is respectively 18m, 23m;In supporter In the range of system, define the headroom of about 13m × 16m, medium-sized backacter can direct operation within this range, relatively arrange Conventional inner support, expands excavation scope, can improve subway foundation pit efficiency of construction.After fortune is dug in the earthwork, by lifting drive mechanism Horizontal truss support system is dropped quickly to into designed elevation, support installation effectiveness is improve.
This subway foundation pit large span support system, including the horizontal truss being horizontally supported between foundation ditch diaphram wall Support unit, the horizontal truss support unit are uniformly distributed along the length and short transverse parallel interval of foundation ditch, the water Plane frame work support unit includes plane girder support, lower plane truss support and vertical connection connecting rod therebetween.
It is shown in Figure 1, the upper plane girder support include two along foundation ditch width arrange to support steel truss 1st, it is connected to the fringe truss 2 to supportting between 1 two ends of steel truss and is connected to supportting the Chinese lute support 3 on 1 two ends two sides of steel truss; The lower plane truss support is identical with upper plane girder supporting construction, and parallel interval arrange.
The described pair of support steel truss 1 include it is parallel to support mobile jib and be connected to support between mobile jib to supportting web member;It is described Fringe truss 2 includes the fringe truss web member between parallel fringe truss mobile jib and connection fringe truss mobile jib;The Chinese lute support 3 is included tiltedly To be arranged on to support the Chinese lute support mobile jib between steel truss 1 and fringe truss 2 and connection Chinese lute support mobile jib with to support steel truss 1 and side Chinese lute support web member between truss 2.
It is shown in Figure 7, liter is connected between the fringe truss 2 and foundation ditch diaphram wall of the horizontal truss support unit Drop actuating unit 10;Between the upper plane girder support of the horizontal truss support unit, the both ends of lower plane truss support Interval is connected with connecting plate, the lifting drive mechanism 10 have 12 groups, correspondence be welded on horizontal truss support unit both sides On connecting plate, connect six groups per side;The lifting drive mechanism 10 includes being connected to the very heavy of horizontal truss support unit end Push up the 15, cradle head 16 for being connected to jack front end, the rolling wheel support 17 being hinged on cradle head 16 and be hinged on roller Roller 14 on support 17;The rolling wheel support 17 is triangular plate or bends strip board at an acute angle, its drift angle with turn Movable joint 16 is hinged, two base angles are symmetrically hinged with a roller 14.
A kind of construction method of the large span support system of subway foundation pit as mentioned, it is characterised in that comprise the following steps that:
Step one, to supportting mobile jib, to supportting web member assembling to supportting steel truss.
Step 2, truss mobile jib, fringe truss web member assembling fringe truss.
Step 3, Chinese lute support mobile jib, Chinese lute support web member assembling Chinese lute support.
Step 4, to supportting steel truss, fringe truss and Chinese lute support assembly connection successively, is assembled into horizontal truss support unit.
Step 5, it is shown in Figure 3, horizontal truss support unit is integrally hung into into subway foundation pit 4 designed elevation 1 Place is put as ground floor horizontal truss support unit 9.
Step 6, accurate 9 plan-position of adjustment ground floor horizontal truss support unit and perpendicularity are simultaneously fixed.How to adjust It is whole?
Step 7, shown in Figure 4, the first layer soil body 11 of excavation is to 2 position of designed elevation.
Step 8, repeat step one to step 4 integrally hang another horizontal truss support unit into subway foundation pit 4 As second layer horizontal truss support unit 12 at 1 position of designed elevation.
Step 9, accurate 12 plan-position of adjustment second layer horizontal truss support unit and perpendicularity are simultaneously fixed.
Ground floor horizontal truss support unit 9 is dropped to 2 position of designed elevation using lifting drive mechanism 10 by step 10 Place.
Step 11, it is shown in Figure 5, accurate 9 plan-position of adjustment ground floor horizontal truss support unit and perpendicularity, And it is fixed.
Step 12, it is shown in Figure 6, excavate the second layer soil body 13.
Step 13, repeat step eight to step 12, until complete the earth excavation construction of subway foundation pit 4.
In the step 6, the two ends of ground floor horizontal truss support unit 9 correspondence is fixed at the top of subway foundation pit the In one Guan Liang 7 and the second Guan Liang 8.

Claims (8)

1. a kind of subway foundation pit large span support system, props up including the horizontal truss being horizontally supported between foundation ditch diaphram wall Support unit, the horizontal truss support unit are uniformly distributed along the length and short transverse parallel interval of foundation ditch, and its feature exists In:The horizontal truss support unit include plane girder support, lower plane truss support and be vertically connected to both it Between connecting rod;
The upper plane girder support include two along foundation ditch width arrange to support steel truss(1), be connected to support steel Truss(1)Fringe truss between two ends(2)Be connected to support steel truss(1)Chinese lute support on the two sides of two ends(3);
The lower plane truss support is identical with upper plane girder supporting construction, and parallel interval arrange.
2. subway foundation pit large span support system according to claim 1, it is characterised in that:Described pair of support steel truss(1) Including it is parallel to support mobile jib and be connected to support between mobile jib to supportting web member.
3. subway foundation pit large span support system according to claim 1, it is characterised in that:The fringe truss(2)Including Fringe truss web member between parallel fringe truss mobile jib and connection fringe truss mobile jib.
4. subway foundation pit large span support system according to claim 1, it is characterised in that:The Chinese lute support(3)Including It is angularly disposed to support steel truss(1)And fringe truss(2)Between Chinese lute support mobile jib and connection Chinese lute support mobile jib with to support steel truss Frame(1)And fringe truss(2)Between Chinese lute support web member.
5. the subway foundation pit large span support system according to Claims 1-4 any one, it is characterised in that:The water The fringe truss of plane frame work support unit(2)Lifting drive mechanism is connected between foundation ditch diaphram wall(10).
6. subway foundation pit large span support system according to claim 5, it is characterised in that:The lifting drive mechanism (10)At least four groups, be symmetrically distributed in horizontal truss support unit both sides.
7. subway foundation pit large span support system according to claim 6, it is characterised in that:The lifting drive mechanism (10)Including the jack for being connected to horizontal truss support unit end(15), be connected to the cradle head of jack front end (16), be hinged on cradle head(16)On rolling wheel support(17)Be hinged on rolling wheel support(17)On roller(14).
8. subway foundation pit large span support system according to claim 7, it is characterised in that:The rolling wheel support(17)For Triangular plate or bending strip board at an acute angle, its drift angle and cradle head(16)It is hinged, two base angles are symmetrically hinged with one Individual roller(14).
CN201621046726.XU 2016-09-09 2016-09-09 Subway foundation pit large -span support system Expired - Fee Related CN206034461U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201621046726.XU CN206034461U (en) 2016-09-09 2016-09-09 Subway foundation pit large -span support system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201621046726.XU CN206034461U (en) 2016-09-09 2016-09-09 Subway foundation pit large -span support system

Publications (1)

Publication Number Publication Date
CN206034461U true CN206034461U (en) 2017-03-22

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106436718A (en) * 2016-09-09 2017-02-22 中建三局集团有限公司 Subway foundation pit large-span support system and construction method thereof

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106436718A (en) * 2016-09-09 2017-02-22 中建三局集团有限公司 Subway foundation pit large-span support system and construction method thereof

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C14 Grant of patent or utility model
GR01 Patent grant
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20170322

Termination date: 20200909

CF01 Termination of patent right due to non-payment of annual fee