CN-121976711-A - Foundation pit dust-raising dynamic protection construction method of self-adaptive working face

CN121976711ACN 121976711 ACN121976711 ACN 121976711ACN-121976711-A

Abstract

The invention belongs to the technical field of building construction, and particularly relates to a foundation pit dust-raising dynamic protection construction method of a self-adaptive working face. According to the invention, the coverage area can be dynamically adjusted according to the construction progress and the operation area, the dynamic self-adaptive protection of the foundation pit operation surface is realized, the dust prevention and control refinement degree and the wind resistance reliability of the system are improved, and the foundation pit construction requirements of different spans can be adapted.

Inventors

SHEN GANG
Yang Fanghu
SHAO CHANGXIANG
ZHU XIAORUI
XU FENGXIA
WANG YONG
YANG JILIANG
TAN JUNLIANG
ZHAO WENYU
MA ZHIQIANG
ZHANG YANG
WANG MIAOMIAO
ZHANG SHUAI

Assignees

山东金城建设有限公司
淄博市住房和城乡建设保障服务中心

Dates

Publication Date: 20260505
Application Date: 20260408

Claims (10)

1. The foundation pit dust-raising dynamic protection construction method of the self-adaptive working face is characterized by comprising the following steps of: s1, erecting a supporting system The method comprises the steps that supporting frames (1) are erected on two longitudinal sides of a foundation pit, the supporting frames (1) on two sides are reinforced through inclined-pulling steel wire ropes (2) taking grouting anchor points as foundation anchor points, and a hydraulic pre-tightening force sensor and an adjusting oil cylinder are arranged between the inclined-pulling steel wire ropes (2) and the grouting anchor points; S2 load bearing guide system arrangement A first telescopic arch-shaped bearing beam (3) and a second telescopic arch-shaped bearing beam (4) which are parallel to each other are respectively erected between the longitudinal head end and the longitudinal tail end of a support frame body (1) at two sides, a longitudinal bearing guide rail (5) is erected between the first telescopic arch-shaped bearing beam (3) and the second telescopic arch-shaped bearing beam (4), two ends of the longitudinal bearing guide rail (5) are respectively fixedly connected with the first telescopic arch-shaped bearing beam (3) and the second telescopic arch-shaped bearing beam (4), a flexible solar cell panel is paved outside the first telescopic arch-shaped bearing beam (3) and the second telescopic arch-shaped bearing beam (4), and a diagnosis lamp is arranged on the support frame body (1); S3, transversely sliding and dustproof cloth hanging Along the axial direction of the longitudinal bearing guide rail (5), dividing the longitudinal length of the foundation pit into a plurality of independent monitoring protection partitions, and configuring a set of independent scissor type electric expansion bracket units and corresponding linkage spraying branches for each monitoring protection partition; the scissor type electric telescopic frame unit comprises a left telescopic frame body (6), a right telescopic frame body (7), dustproof and rainproof cloth (8) and an electric driving module (9), wherein the left telescopic frame body (6) and the right telescopic frame body (7) are transversely and symmetrically arranged along a foundation pit, the dustproof and rainproof cloth (8) is fully paved and attached on the left telescopic frame body (6) and the right telescopic frame body (7), the electric driving module (9) drives the left telescopic frame body (6) and the right telescopic frame body (7) to transversely do scissor type telescopic movement along the foundation pit, each monitoring protection partition is internally provided with an independent dust concentration sensor, the dust concentration sensor is independently controlled in a linkage manner with a spraying branch corresponding to the monitoring protection partition, and the scissor type electric telescopic frame unit is provided with a wind speed and direction sensor which covers the whole foundation pit; S4, self-adaptive coverage Through each monitoring protection subregion's electric drive module (9), the horizontal flexible stroke of left flexible support body (6) and right flexible support body (7) of independent control correspondence adjusts the horizontal coverage of foundation ditch, realizes the dynamic self-adaptation adjustment of the totally closed protection of foundation ditch operation area nimble opening, non-operation area.
2. The foundation pit dust dynamic protection construction method of the self-adaptive working face according to claim 1, wherein in the step S1, the whole support frame body (1) is arranged in a double-row frame body, the support frame body (1) comprises vertical rods and horizontal rods, the height of the vertical rods is 1000-4500mm, the vertical distance of the horizontal rods is 1000-1600mm, the transverse distance of the vertical rods is 1000-1500mm, and the longitudinal distance of the vertical rods is 1200-1800mm.
3. The construction method for dynamically protecting foundation pit dust on self-adaptive working surface according to claim 1, wherein in step S1, the grouting anchoring point comprises grouting flower pipes (10), the length of each grouting flower pipe (10) is 1000-2000mm, and the longitudinal distance between every two adjacent grouting flower pipes (10) is 1200-1800mm.
4. The construction method for dynamically protecting the dust raising of the foundation pit of the self-adaptive working face according to claim 1, wherein three longitudinal bearing guide rails (5) are arranged, namely a left longitudinal guide rail, a middle longitudinal guide rail and a right longitudinal guide rail, and the left longitudinal guide rail, the middle longitudinal guide rail and the right longitudinal guide rail are arranged at equal intervals along the transverse direction of the foundation pit.
5. The construction method for dynamically protecting the dust raising of the foundation pit of the self-adaptive working face according to claim 4, wherein the left telescopic frame body (6) and the right telescopic frame body (7) are respectively a plane scissor mechanism formed by hinging a plurality of groups of scissor connecting rods in sequence, the electric driving module (9) comprises a driving motor and a transmission screw rod, the transmission screw rod is transversely arranged along the foundation pit, and the driving motor is fixed on a middle longitudinal guide rail.
6. The construction method for dynamically protecting foundation pit dust on self-adaptive working surface according to claim 5, wherein the surfaces of the scissor connecting rods of the left telescopic frame body (6) and the right telescopic frame body (7) are respectively provided with an anti-corrosion coating.
7. The foundation pit dust-raising dynamic protection construction method of the self-adaptive working face according to claim 1, wherein the dustproof and waterproof cloth (8) is made of polyethylene, polyvinyl chloride or nylon oxford, and an anti-aging coating is arranged on the surface of the dustproof and waterproof cloth (8).
8. The construction method for dynamically protecting foundation pit dust on an adaptive working surface according to claim 1, wherein the dust concentration sensor is fixed on a longitudinal bearing guide rail (5).
9. The construction method for dynamically protecting the dust raising of the foundation pit of the self-adaptive working face according to claim 1, wherein a spray nozzle is arranged on the spray branch, the spray nozzle is arranged on the support frame body (1), and the spray direction of the spray nozzle faces the inner side of the foundation pit.
10. The construction method for dynamically protecting foundation pit dust on self-adaptive working surface according to claim 1, wherein the diagnosis lamp, the dust concentration sensor and the wind speed and direction sensor are electrically connected with the flexible solar panel.

Description

Foundation pit dust-raising dynamic protection construction method of self-adaptive working face Technical Field The invention belongs to the technical field of building construction, and particularly relates to a foundation pit dust-raising dynamic protection construction method of a self-adaptive working face. Background Along with the large-scale development of urban underground space, the number and scale of large-span and ultra-deep foundation pit projects continuously increase, dust pollution generated in the foundation pit construction process becomes one of important sources of urban atmospheric pollution, and the requirements of environmental protection departments on the refinement and normalization of building construction dust management and control are continuously improved. At present, the control of foundation pit construction raise dust in the trade mainly relies on traditional technical means such as watering dust fall, cover dust screen, portable fog gun machine and fixed spraying system, has appeared partly taking slide rail formula dust screen as the foundation ditch cover device of core simultaneously, but prior art scheme all has the technical defect that is difficult to overcome, can't satisfy the core demand of full flow, the refinement of large-span foundation pit engineering raise dust, self-adaptation prevention and control. The fixed spraying system has the advantages that the cost of the covering dust screen is low, the covering dust screen can not be adapted to the protection requirement of a dynamic working surface, the fixed covering dust screen can only be used for the fixed covering of a non-working area, the material is easy to age and damage, the dust suppression effect is greatly attenuated in windy weather, secondary pollution is easily caused by damaged waste materials, the movable fog gun machine is mostly dependent on manual whole-course operation, the coverage area of a single machine is limited, the problems of incapacity of scheduling, overlapping or omission of the dust suppression area are easily caused during multi-machine collaborative operation, the uniform prevention and control of a whole foundation pit can not be realized, the fixed spraying system has the basic automatic start-stop capability, the covering mode is stiff, the dust suppression inequality and the periphery water accumulation of the foundation pit can not be easily caused under the influence of wind power according to real-time dust distribution and environmental parameter and working surface change self-adaption adjustment. In addition, the traditional technical means have core pain points with poor adaptive capacity of the dynamic working face, the dust protection range cannot be synchronously adjusted according to dynamic propulsion of working procedures such as excavation, supporting and soil discharging in a foundation pit, dynamic balance of flexible open working area and totally-closed protection of non-working area cannot be realized, and construction efficiency and dust prevention and control effects cannot be considered. Meanwhile, the universality of the traditional technical scheme is extremely poor, and foundation pit engineering with different spans and different excavation depths cannot be adapted. Chinese patent CN209324009U discloses a foundation pit dust-proof device, comprising a plurality of support posts, longitudinal slide rails, pulleys, hanging ropes and dust-proof nets. The vertical foundation pit that is fixed in of a plurality of support posts, vertical slide rail level are fixed on the support post, pulley and slide rail sliding fit, hang rope both ends and fix on two relative pulleys, and the dust screen passes through the slip ring slip setting on hanging the rope. The device can cover the foundation ditch in a flexible way under the prerequisite that does not influence vertical transportation, reduces the repeated cover time of raise dust net. However, the device relies on manual operation completely, and the opening, closing and moving of the dustproof net all need manual pushing of the pulley and the sliding ring, so that the efficiency is low. In addition, the supporting structure of the patent adopts a fixed I-steel upright post, the whole structure is lighter, shaking and dust screen damage are easy to occur in windy weather, and the reliability and durability of the system are insufficient. Meanwhile, because the coverage mode depends on manual pushing, large-scale rapid full coverage or local accurate coverage is difficult to realize. Disclosure of Invention The invention aims to provide a foundation pit dust-raising dynamic protection construction method of a self-adaptive working face, which can dynamically adjust coverage according to construction progress and a working area and solve the problems that a traditional fixed coverage scheme is rigid in coverage mode and can not realize large-scale rapid full-closed protection and local accurate opening an