Abercrombie Nederland Construction quality of some of the multiple problems of t

Construction quality of some of the multiple problems of the objective factors and prevention recommendations 4m grid points located around joints, (slit depth ≥ 2 / 3 thickness),Burberry Outlet, steel mesh to be broken in the sub-frame joints, sealing with a waterproof ointment, the entire building floor should be polished using mechanical magma construction technology, not block should be approved. Based upon the structure of the surface of the slope surface, the location is no need to do in a small ditch and the whole building barrier layer. Above will not only set a practical and durable surface, while the bottom set siphon drainage (hydraulic conductivity) layer, can be more effective in protecting underground floor surface drying effect. 2.2 Case 2 - steel angle support deep foundation is difficult to guarantee the quality of the node connected deep foundation pit current form, the steel piles supporting and retaining wall system is a combination of supporting the more common form of support,goedkope Abercrombie Architectural review methods, as support with a lightweight, high strength steel, reusable, use the shortcut, etc., in a large number of foundation support has been widely used, especially in the subway station project in the most widely used,Abercrombie Nederland, often used as a standard section steel support on the support, the two expand the client-side device using the supporting method of gusset increases,Abercrombie Nederland, but the last two years due to the location of steel gusset support subsidence caused by excessive deformation of the incidents occurred from time to time, the main reason is to ignore the node angle support caused by the construction quality. Construction quality of the main difficulties of nodes around the purlin and steel pile retaining (wall) of the connection and the steel support and steel purlin around the connection, is to support an engineering foundation design of the steel angle support the actual construction of an example difficult. Guangzhou Construction GUANGZHOUARCHITECTURE2004 No. 4 of the project for an underground station close by end of pit row q) 1200 punching piles, diaphragm walls in both sides, ends with steel angle support, both ends of the purlin are surrounded by steel stays in the pile and diaphragm wall punching, the node connector shown in Figure 2, Figure 3. Figure 2 Circuit purlin surface bulk sample (punch pile) _-If. Dish the outline of core column C, Man o · 5o2l. , Ic 32, three towel bar ,---- T, l good transcripts. , II-dL: 120 ~ u | {■ J 'a bolt of a IL-550 0 Hong Figure 3 gusset punch pile sections of the gusset design as follows: (1) gusset end with the retaining structure contact points should be closely integrated with the cutting surface of the post in the punching hair, wiping MIO rapidly solidified early strength mortar bedding. (2) 3m each angle support within the support with q) 32 reinforced the underside of the steel plate and pile around purlin connection, arranged in the same vertical distance between two 32-bar level for the 200mm, the length of each bar anchorage is not less than 32d . In the note,Abercrombie and Fitch, the level spacing of 200mm required to play q) 32 bar two, in fact, impossible to hit in the back filled reinforced cement mortar, and can only play in and around purlin vertical tangent to the core concrete piles, but in Punching the length of nearly l200mm drilled pile holes is more difficult, and the screw either embedded or after the first drill holes are difficult to meet the design requirements of the depth and precision. And the requirements of steel surrounded by 3m sub-purlin construction, welding is more difficult in the field, around the purlin and steel support is difficult to differentiate the quality of welding seam quality with the naked eye, but in the scene around the bottom purlin Yang welding, construction difficult, supervision and inspection more difficult. For punching the side of the gusset pile, as only 6 per 3m within the gusset reinforced to withstand the shear produced by horizontal component, which usually contribute to the design level of the pile by the wall that bear not to do checking. Therefore, during the actual construction of retaining the deformation is difficult to control. In another project, retaining structure for the underground continuous wall of steel angle support, the design requirements of steel around the bottom purlin and the diaphragm wall longitudinal reinforcement and steel welded and filled with expansion bolt (see Figure 4), but the actual , the construction is even more difficult, mainly underground continuous wall by the levels of the main longitudinal reinforcement steel barrier outside, only in the outer edge of the spot, and the bolt hole location will be met and to change the location bar, find a place in the vicinity spot welding and steel purlin and then around a fixed, it is difficult to meet the design requirements, thus planting the security risk. Figure 4 underground continuous wall of steel gusset connecting node diagram can be seen above the node of steel gusset support either welded or bolted construction site has its operational test of feasibility and objective aspects of the problem, I propose in this duration, subject, priority is considered as the foundation of reinforced concrete gusset gusset end of the support that the use of reinforced concrete, in terms of construction and testing are relatively simple, and easy to ensure the construction quality, ensure a solid node, which can effectively the level of support to withstand the shear angle. 3 Conclusion In summary, some of the problems are multiple construction quality and construction site environment and conditions are closely related, through the above analysis and processing of objective factors, that is the only practice the sole criterion for testing truth, to ensure quality, design and construction aspects from the scientific, rigorous and feasible direction of improvement in order to effectively stop the construction quality problems.